Merge pull request #1524 from nextcloud/add-support-for-calls-in-other-browsers

Add support for calls in other browsers

15 files changed, 9688 insertions, 18582 deletions

diff --git a/.eslintignore b/.eslintignore
index dc3276491..6a71b494f 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,7 +1,7 @@
 /js/admin/*
 /js/tests/*
 /js/vendor/*
-/js/simplewebrtc.js
+/js/simplewebrtc/*
 /js/**/templates.js
 /karma.conf.js
 /tests/*
diff --git a/Makefile b/Makefile
index 1b769fcd5..9d21bbd9f 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,12 @@ install-npm-deps-dev:
 compile-handlebars-templates: dev-setup
 	bash compile-handlebars-templates.sh
 
+bundle-simplewebrtc: dev-setup
+	# webrtc-adapter uses JavaScript features not supported by browserify,
+	# so the sources need to be transformed using babel to a compatible
+	# version of JavaScript.
+	npx browserify --standalone SimpleWebRTC --transform [ babelify --global --presets [ @babel/env ] ] js/simplewebrtc/simplewebrtc.js > js/simplewebrtc/bundled.js
+
 dev-setup: install-npm-deps-dev
 
 appstore: clean install-deps
diff --git a/js/merged-files.json b/js/merged-files.json
index 6e139e1ba..79094e011 100644
--- a/js/merged-files.json
+++ b/js/merged-files.json
@@ -6,6 +6,7 @@
   "vendor/jshashes/hashes.min.js",
   "vendor/Caret.js/dist/jquery.caret.min.js",
   "vendor/At.js/dist/js/jquery.atwho.min.js",
+  "simplewebrtc/bundled.js",
   "models/chatmessage.js",
   "models/chatmessagecollection.js",
   "models/room.js",
@@ -21,7 +22,6 @@
   "views/templates.js",
   "views/videoview.js",
   "views/virtuallist.js",
-  "simplewebrtc.js",
   "webrtc.js",
   "signaling.js",
   "connection.js",
diff --git a/js/merged-guest.json b/js/merged-guest.json
index 755155f2f..2d67565b3 100644
--- a/js/merged-guest.json
+++ b/js/merged-guest.json
@@ -6,6 +6,7 @@
   "vendor/jshashes/hashes.min.js",
   "vendor/Caret.js/dist/jquery.caret.min.js",
   "vendor/At.js/dist/js/jquery.atwho.min.js",
+  "simplewebrtc/bundled.js",
   "models/chatmessage.js",
   "models/chatmessagecollection.js",
   "models/localstoragemodel.js",
@@ -30,7 +31,6 @@
   "views/templates.js",
   "views/videoview.js",
   "views/virtuallist.js",
-  "simplewebrtc.js",
   "webrtc.js",
   "signaling.js",
   "connection.js",
diff --git a/js/merged-share-auth.json b/js/merged-share-auth.json
index 567fc1f5e..11a6d21c8 100644
--- a/js/merged-share-auth.json
+++ b/js/merged-share-auth.json
@@ -6,6 +6,7 @@
   "vendor/jshashes/hashes.min.js",
   "vendor/Caret.js/dist/jquery.caret.min.js",
   "vendor/At.js/dist/js/jquery.atwho.min.js",
+  "simplewebrtc/bundled.js",
   "models/chatmessage.js",
   "models/chatmessagecollection.js",
   "models/localstoragemodel.js",
@@ -30,7 +31,6 @@
   "views/templates.js",
   "views/videoview.js",
   "views/virtuallist.js",
-  "simplewebrtc.js",
   "webrtc.js",
   "signaling.js",
   "connection.js",
diff --git a/js/merged.json b/js/merged.json
index db9906fe5..b06afba55 100644
--- a/js/merged.json
+++ b/js/merged.json
@@ -6,6 +6,7 @@
   "vendor/jshashes/hashes.min.js",
   "vendor/Caret.js/dist/jquery.caret.min.js",
   "vendor/At.js/dist/js/jquery.atwho.min.js",
+  "simplewebrtc/bundled.js",
   "models/chatmessage.js",
   "models/chatmessagecollection.js",
   "models/room.js",
@@ -29,7 +30,6 @@
   "views/templates.js",
   "views/videoview.js",
   "views/virtuallist.js",
-  "simplewebrtc.js",
   "webrtc.js",
   "signaling.js",
   "connection.js",
diff --git a/js/simplewebrtc.js b/js/simplewebrtc.js
deleted file mode 100644
index eaa7370f6..000000000
--- a/js/simplewebrtc.js
+++ /dev/null
@@ -1,18562 +0,0 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.SimpleWebRTC = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-	module.exports = after
-
-	function after(count, callback, err_cb) {
-		var bail = false
-		err_cb = err_cb || noop
-		proxy.count = count
-
-		return (count === 0) ? callback() : proxy
-
-		function proxy(err, result) {
-			if (proxy.count <= 0) {
-				throw new Error('after called too many times')
-			}
-			--proxy.count
-
-			// after first error, rest are passed to err_cb
-			if (err) {
-				bail = true
-				callback(err)
-				// future error callbacks will go to error handler
-				callback = err_cb
-			} else if (proxy.count === 0 && !bail) {
-				callback(null, result)
-			}
-		}
-	}
-
-	function noop() {}
-
-},{}],2:[function(require,module,exports){
-	/**
-	 * An abstraction for slicing an arraybuffer even when
-	 * ArrayBuffer.prototype.slice is not supported
-	 *
-	 * @api public
-	 */
-
-	module.exports = function(arraybuffer, start, end) {
-		var bytes = arraybuffer.byteLength;
-		start = start || 0;
-		end = end || bytes;
-
-		if (arraybuffer.slice) { return arraybuffer.slice(start, end); }
-
-		if (start < 0) { start += bytes; }
-		if (end < 0) { end += bytes; }
-		if (end > bytes) { end = bytes; }
-
-		if (start >= bytes || start >= end || bytes === 0) {
-			return new ArrayBuffer(0);
-		}
-
-		var abv = new Uint8Array(arraybuffer);
-		var result = new Uint8Array(end - start);
-		for (var i = start, ii = 0; i < end; i++, ii++) {
-			result[ii] = abv[i];
-		}
-		return result.buffer;
-	};
-
-},{}],3:[function(require,module,exports){
-	var adapter = require('webrtc-adapter');
-	module.exports = function (stream, el, options) {
-		var item;
-		var URL = window.URL;
-		var element = el;
-		var opts = {
-			autoplay: true,
-			mirror: false,
-			muted: false,
-			audio: false,
-			disableContextMenu: false
-		};
-
-		if (options) {
-			for (item in options) {
-				opts[item] = options[item];
-			}
-		}
-
-		if (!element) {
-			element = document.createElement(opts.audio ? 'audio' : 'video');
-		} else if (element.tagName.toLowerCase() === 'audio') {
-			opts.audio = true;
-		}
-
-		if (opts.disableContextMenu) {
-			element.oncontextmenu = function (e) {
-				e.preventDefault();
-			};
-		}
-
-		if (opts.autoplay) element.autoplay = 'autoplay';
-		if (opts.muted) element.muted = true;
-		if (!opts.audio && opts.mirror) {
-			['', 'moz', 'webkit', 'o', 'ms'].forEach(function (prefix) {
-				var styleName = prefix ? prefix + 'Transform' : 'transform';
-				element.style[styleName] = 'scaleX(-1)';
-			});
-		}
-
-		element.srcObject = stream;
-		return element;
-	};
-
-},{"webrtc-adapter":90}],4:[function(require,module,exports){
-
-	/**
-	 * Expose `Backoff`.
-	 */
-
-	module.exports = Backoff;
-
-	/**
-	 * Initialize backoff timer with `opts`.
-	 *
-	 * - `min` initial timeout in milliseconds [100]
-	 * - `max` max timeout [10000]
-	 * - `jitter` [0]
-	 * - `factor` [2]
-	 *
-	 * @param {Object} opts
-	 * @api public
-	 */
-
-	function Backoff(opts) {
-		opts = opts || {};
-		this.ms = opts.min || 100;
-		this.max = opts.max || 10000;
-		this.factor = opts.factor || 2;
-		this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
-		this.attempts = 0;
-	}
-
-	/**
-	 * Return the backoff duration.
-	 *
-	 * @return {Number}
-	 * @api public
-	 */
-
-	Backoff.prototype.duration = function(){
-		var ms = this.ms * Math.pow(this.factor, this.attempts++);
-		if (this.jitter) {
-			var rand =  Math.random();
-			var deviation = Math.floor(rand * this.jitter * ms);
-			ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
-		}
-		return Math.min(ms, this.max) | 0;
-	};
-
-	/**
-	 * Reset the number of attempts.
-	 *
-	 * @api public
-	 */
-
-	Backoff.prototype.reset = function(){
-		this.attempts = 0;
-	};
-
-	/**
-	 * Set the minimum duration
-	 *
-	 * @api public
-	 */
-
-	Backoff.prototype.setMin = function(min){
-		this.ms = min;
-	};
-
-	/**
-	 * Set the maximum duration
-	 *
-	 * @api public
-	 */
-
-	Backoff.prototype.setMax = function(max){
-		this.max = max;
-	};
-
-	/**
-	 * Set the jitter
-	 *
-	 * @api public
-	 */
-
-	Backoff.prototype.setJitter = function(jitter){
-		this.jitter = jitter;
-	};
-
-
-},{}],5:[function(require,module,exports){
-	/*
-	 * base64-arraybuffer
-	 * https://github.com/niklasvh/base64-arraybuffer
-	 *
-	 * Copyright (c) 2012 Niklas von Hertzen
-	 * Licensed under the MIT license.
-	 */
-	(function(chars){
-		"use strict";
-
-		exports.encode = function(arraybuffer) {
-			var bytes = new Uint8Array(arraybuffer),
-				i, len = bytes.length, base64 = "";
-
-			for (i = 0; i < len; i+=3) {
-				base64 += chars[bytes[i] >> 2];
-				base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
-				base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
-				base64 += chars[bytes[i + 2] & 63];
-			}
-
-			if ((len % 3) === 2) {
-				base64 = base64.substring(0, base64.length - 1) + "=";
-			} else if (len % 3 === 1) {
-				base64 = base64.substring(0, base64.length - 2) + "==";
-			}
-
-			return base64;
-		};
-
-		exports.decode =  function(base64) {
-			var bufferLength = base64.length * 0.75,
-				len = base64.length, i, p = 0,
-				encoded1, encoded2, encoded3, encoded4;
-
-			if (base64[base64.length - 1] === "=") {
-				bufferLength--;
-				if (base64[base64.length - 2] === "=") {
-					bufferLength--;
-				}
-			}
-
-			var arraybuffer = new ArrayBuffer(bufferLength),
-				bytes = new Uint8Array(arraybuffer);
-
-			for (i = 0; i < len; i+=4) {
-				encoded1 = chars.indexOf(base64[i]);
-				encoded2 = chars.indexOf(base64[i+1]);
-				encoded3 = chars.indexOf(base64[i+2]);
-				encoded4 = chars.indexOf(base64[i+3]);
-
-				bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
-				bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
-				bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
-			}
-
-			return arraybuffer;
-		};
-	})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");
-
-},{}],6:[function(require,module,exports){
-	(function (global){
-		/**
-		 * Create a blob builder even when vendor prefixes exist
-		 */
-
-		var BlobBuilder = global.BlobBuilder
-			|| global.WebKitBlobBuilder
-			|| global.MSBlobBuilder
-			|| global.MozBlobBuilder;
-
-		/**
-		 * Check if Blob constructor is supported
-		 */
-
-		var blobSupported = (function() {
-			try {
-				var a = new Blob(['hi']);
-				return a.size === 2;
-			} catch(e) {
-				return false;
-			}
-		})();
-
-		/**
-		 * Check if Blob constructor supports ArrayBufferViews
-		 * Fails in Safari 6, so we need to map to ArrayBuffers there.
-		 */
-
-		var blobSupportsArrayBufferView = blobSupported && (function() {
-				try {
-					var b = new Blob([new Uint8Array([1,2])]);
-					return b.size === 2;
-				} catch(e) {
-					return false;
-				}
-			})();
-
-		/**
-		 * Check if BlobBuilder is supported
-		 */
-
-		var blobBuilderSupported = BlobBuilder
-			&& BlobBuilder.prototype.append
-			&& BlobBuilder.prototype.getBlob;
-
-		/**
-		 * Helper function that maps ArrayBufferViews to ArrayBuffers
-		 * Used by BlobBuilder constructor and old browsers that didn't
-		 * support it in the Blob constructor.
-		 */
-
-		function mapArrayBufferViews(ary) {
-			for (var i = 0; i < ary.length; i++) {
-				var chunk = ary[i];
-				if (chunk.buffer instanceof ArrayBuffer) {
-					var buf = chunk.buffer;
-
-					// if this is a subarray, make a copy so we only
-					// include the subarray region from the underlying buffer
-					if (chunk.byteLength !== buf.byteLength) {
-						var copy = new Uint8Array(chunk.byteLength);
-						copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
-						buf = copy.buffer;
-					}
-
-					ary[i] = buf;
-				}
-			}
-		}
-
-		function BlobBuilderConstructor(ary, options) {
-			options = options || {};
-
-			var bb = new BlobBuilder();
-			mapArrayBufferViews(ary);
-
-			for (var i = 0; i < ary.length; i++) {
-				bb.append(ary[i]);
-			}
-
-			return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
-		};
-
-		function BlobConstructor(ary, options) {
-			mapArrayBufferViews(ary);
-			return new Blob(ary, options || {});
-		};
-
-		module.exports = (function() {
-			if (blobSupported) {
-				return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
-			} else if (blobBuilderSupported) {
-				return BlobBuilderConstructor;
-			} else {
-				return undefined;
-			}
-		})();
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],7:[function(require,module,exports){
-	/**
-	 * Slice reference.
-	 */
-
-	var slice = [].slice;
-
-	/**
-	 * Bind `obj` to `fn`.
-	 *
-	 * @param {Object} obj
-	 * @param {Function|String} fn or string
-	 * @return {Function}
-	 * @api public
-	 */
-
-	module.exports = function(obj, fn){
-		if ('string' == typeof fn) fn = obj[fn];
-		if ('function' != typeof fn) throw new Error('bind() requires a function');
-		var args = slice.call(arguments, 2);
-		return function(){
-			return fn.apply(obj, args.concat(slice.call(arguments)));
-		}
-	};
-
-},{}],8:[function(require,module,exports){
-
-	/**
-	 * Expose `Emitter`.
-	 */
-
-	module.exports = Emitter;
-
-	/**
-	 * Initialize a new `Emitter`.
-	 *
-	 * @api public
-	 */
-
-	function Emitter(obj) {
-		if (obj) return mixin(obj);
-	};
-
-	/**
-	 * Mixin the emitter properties.
-	 *
-	 * @param {Object} obj
-	 * @return {Object}
-	 * @api private
-	 */
-
-	function mixin(obj) {
-		for (var key in Emitter.prototype) {
-			obj[key] = Emitter.prototype[key];
-		}
-		return obj;
-	}
-
-	/**
-	 * Listen on the given `event` with `fn`.
-	 *
-	 * @param {String} event
-	 * @param {Function} fn
-	 * @return {Emitter}
-	 * @api public
-	 */
-
-	Emitter.prototype.on =
-		Emitter.prototype.addEventListener = function(event, fn){
-			this._callbacks = this._callbacks || {};
-			(this._callbacks[event] = this._callbacks[event] || [])
-				.push(fn);
-			return this;
-		};
-
-	/**
-	 * Adds an `event` listener that will be invoked a single
-	 * time then automatically removed.
-	 *
-	 * @param {String} event
-	 * @param {Function} fn
-	 * @return {Emitter}
-	 * @api public
-	 */
-
-	Emitter.prototype.once = function(event, fn){
-		var self = this;
-		this._callbacks = this._callbacks || {};
-
-		function on() {
-			self.off(event, on);
-			fn.apply(this, arguments);
-		}
-
-		on.fn = fn;
-		this.on(event, on);
-		return this;
-	};
-
-	/**
-	 * Remove the given callback for `event` or all
-	 * registered callbacks.
-	 *
-	 * @param {String} event
-	 * @param {Function} fn
-	 * @return {Emitter}
-	 * @api public
-	 */
-
-	Emitter.prototype.off =
-		Emitter.prototype.removeListener =
-			Emitter.prototype.removeAllListeners =
-				Emitter.prototype.removeEventListener = function(event, fn){
-					this._callbacks = this._callbacks || {};
-
-					// all
-					if (0 == arguments.length) {
-						this._callbacks = {};
-						return this;
-					}
-
-					// specific event
-					var callbacks = this._callbacks[event];
-					if (!callbacks) return this;
-
-					// remove all handlers
-					if (1 == arguments.length) {
-						delete this._callbacks[event];
-						return this;
-					}
-
-					// remove specific handler
-					var cb;
-					for (var i = 0; i < callbacks.length; i++) {
-						cb = callbacks[i];
-						if (cb === fn || cb.fn === fn) {
-							callbacks.splice(i, 1);
-							break;
-						}
-					}
-					return this;
-				};
-
-	/**
-	 * Emit `event` with the given args.
-	 *
-	 * @param {String} event
-	 * @param {Mixed} ...
-	 * @return {Emitter}
-	 */
-
-	Emitter.prototype.emit = function(event){
-		this._callbacks = this._callbacks || {};
-		var args = [].slice.call(arguments, 1)
-			, callbacks = this._callbacks[event];
-
-		if (callbacks) {
-			callbacks = callbacks.slice(0);
-			for (var i = 0, len = callbacks.length; i < len; ++i) {
-				callbacks[i].apply(this, args);
-			}
-		}
-
-		return this;
-	};
-
-	/**
-	 * Return array of callbacks for `event`.
-	 *
-	 * @param {String} event
-	 * @return {Array}
-	 * @api public
-	 */
-
-	Emitter.prototype.listeners = function(event){
-		this._callbacks = this._callbacks || {};
-		return this._callbacks[event] || [];
-	};
-
-	/**
-	 * Check if this emitter has `event` handlers.
-	 *
-	 * @param {String} event
-	 * @return {Boolean}
-	 * @api public
-	 */
-
-	Emitter.prototype.hasListeners = function(event){
-		return !! this.listeners(event).length;
-	};
-
-},{}],9:[function(require,module,exports){
-
-	module.exports = function(a, b){
-		var fn = function(){};
-		fn.prototype = b.prototype;
-		a.prototype = new fn;
-		a.prototype.constructor = a;
-	};
-},{}],10:[function(require,module,exports){
-
-	module.exports =  require('./lib/');
-
-},{"./lib/":11}],11:[function(require,module,exports){
-
-	module.exports = require('./socket');
-
-	/**
-	 * Exports parser
-	 *
-	 * @api public
-	 *
-	 */
-	module.exports.parser = require('engine.io-parser');
-
-},{"./socket":12,"engine.io-parser":24}],12:[function(require,module,exports){
-	(function (global){
-		/**
-		 * Module dependencies.
-		 */
-
-		var transports = require('./transports');
-		var Emitter = require('component-emitter');
-		var debug = require('debug')('engine.io-client:socket');
-		var index = require('indexof');
-		var parser = require('engine.io-parser');
-		var parseuri = require('parseuri');
-		var parsejson = require('parsejson');
-		var parseqs = require('parseqs');
-
-		/**
-		 * Module exports.
-		 */
-
-		module.exports = Socket;
-
-		/**
-		 * Noop function.
-		 *
-		 * @api private
-		 */
-
-		function noop(){}
-
-		/**
-		 * Socket constructor.
-		 *
-		 * @param {String|Object} uri or options
-		 * @param {Object} options
-		 * @api public
-		 */
-
-		function Socket(uri, opts){
-			if (!(this instanceof Socket)) return new Socket(uri, opts);
-
-			opts = opts || {};
-
-			if (uri && 'object' == typeof uri) {
-				opts = uri;
-				uri = null;
-			}
-
-			if (uri) {
-				uri = parseuri(uri);
-				opts.host = uri.host;
-				opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
-				opts.port = uri.port;
-				if (uri.query) opts.query = uri.query;
-			}
-
-			this.secure = null != opts.secure ? opts.secure :
-				(global.location && 'https:' == location.protocol);
-
-			if (opts.host) {
-				var pieces = opts.host.split(':');
-				opts.hostname = pieces.shift();
-				if (pieces.length) {
-					opts.port = pieces.pop();
-				} else if (!opts.port) {
-					// if no port is specified manually, use the protocol default
-					opts.port = this.secure ? '443' : '80';
-				}
-			}
-
-			this.agent = opts.agent || false;
-			this.hostname = opts.hostname ||
-				(global.location ? location.hostname : 'localhost');
-			this.port = opts.port || (global.location && location.port ?
-					location.port :
-					(this.secure ? 443 : 80));
-			this.query = opts.query || {};
-			if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
-			this.upgrade = false !== opts.upgrade;
-			this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
-			this.forceJSONP = !!opts.forceJSONP;
-			this.jsonp = false !== opts.jsonp;
-			this.forceBase64 = !!opts.forceBase64;
-			this.enablesXDR = !!opts.enablesXDR;
-			this.timestampParam = opts.timestampParam || 't';
-			this.timestampRequests = opts.timestampRequests;
-			this.transports = opts.transports || ['polling', 'websocket'];
-			this.readyState = '';
-			this.writeBuffer = [];
-			this.callbackBuffer = [];
-			this.policyPort = opts.policyPort || 843;
-			this.rememberUpgrade = opts.rememberUpgrade || false;
-			this.binaryType = null;
-			this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
-
-			// SSL options for Node.js client
-			this.pfx = opts.pfx || null;
-			this.key = opts.key || null;
-			this.passphrase = opts.passphrase || null;
-			this.cert = opts.cert || null;
-			this.ca = opts.ca || null;
-			this.ciphers = opts.ciphers || null;
-			this.rejectUnauthorized = opts.rejectUnauthorized || null;
-
-			this.open();
-		}
-
-		Socket.priorWebsocketSuccess = false;
-
-		/**
-		 * Mix in `Emitter`.
-		 */
-
-		Emitter(Socket.prototype);
-
-		/**
-		 * Protocol version.
-		 *
-		 * @api public
-		 */
-
-		Socket.protocol = parser.protocol; // this is an int
-
-		/**
-		 * Expose deps for legacy compatibility
-		 * and standalone browser access.
-		 */
-
-		Socket.Socket = Socket;
-		Socket.Transport = require('./transport');
-		Socket.transports = require('./transports');
-		Socket.parser = require('engine.io-parser');
-
-		/**
-		 * Creates transport of the given type.
-		 *
-		 * @param {String} transport name
-		 * @return {Transport}
-		 * @api private
-		 */
-
-		Socket.prototype.createTransport = function (name) {
-			debug('creating transport "%s"', name);
-			var query = clone(this.query);
-
-			// append engine.io protocol identifier
-			query.EIO = parser.protocol;
-
-			// transport name
-			query.transport = name;
-
-			// session id if we already have one
-			if (this.id) query.sid = this.id;
-
-			var transport = new transports[name]({
-				agent: this.agent,
-				hostname: this.hostname,
-				port: this.port,
-				secure: this.secure,
-				path: this.path,
-				query: query,
-				forceJSONP: this.forceJSONP,
-				jsonp: this.jsonp,
-				forceBase64: this.forceBase64,
-				enablesXDR: this.enablesXDR,
-				timestampRequests: this.timestampRequests,
-				timestampParam: this.timestampParam,
-				policyPort: this.policyPort,
-				socket: this,
-				pfx: this.pfx,
-				key: this.key,
-				passphrase: this.passphrase,
-				cert: this.cert,
-				ca: this.ca,
-				ciphers: this.ciphers,
-				rejectUnauthorized: this.rejectUnauthorized
-			});
-
-			return transport;
-		};
-
-		function clone (obj) {
-			var o = {};
-			for (var i in obj) {
-				if (obj.hasOwnProperty(i)) {
-					o[i] = obj[i];
-				}
-			}
-			return o;
-		}
-
-		/**
-		 * Initializes transport to use and starts probe.
-		 *
-		 * @api private
-		 */
-		Socket.prototype.open = function () {
-			var transport;
-			if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
-				transport = 'websocket';
-			} else if (0 == this.transports.length) {
-				// Emit error on next tick so it can be listened to
-				var self = this;
-				setTimeout(function() {
-					self.emit('error', 'No transports available');
-				}, 0);
-				return;
-			} else {
-				transport = this.transports[0];
-			}
-			this.readyState = 'opening';
-
-			// Retry with the next transport if the transport is disabled (jsonp: false)
-			var transport;
-			try {
-				transport = this.createTransport(transport);
-			} catch (e) {
-				this.transports.shift();
-				this.open();
-				return;
-			}
-
-			transport.open();
-			this.setTransport(transport);
-		};
-
-		/**
-		 * Sets the current transport. Disables the existing one (if any).
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.setTransport = function(transport){
-			debug('setting transport %s', transport.name);
-			var self = this;
-
-			if (this.transport) {
-				debug('clearing existing transport %s', this.transport.name);
-				this.transport.removeAllListeners();
-			}
-
-			// set up transport
-			this.transport = transport;
-
-			// set up transport listeners
-			transport
-				.on('drain', function(){
-					self.onDrain();
-				})
-				.on('packet', function(packet){
-					self.onPacket(packet);
-				})
-				.on('error', function(e){
-					self.onError(e);
-				})
-				.on('close', function(){
-					self.onClose('transport close');
-				});
-		};
-
-		/**
-		 * Probes a transport.
-		 *
-		 * @param {String} transport name
-		 * @api private
-		 */
-
-		Socket.prototype.probe = function (name) {
-			debug('probing transport "%s"', name);
-			var transport = this.createTransport(name, { probe: 1 })
-				, failed = false
-				, self = this;
-
-			Socket.priorWebsocketSuccess = false;
-
-			function onTransportOpen(){
-				if (self.onlyBinaryUpgrades) {
-					var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
-					failed = failed || upgradeLosesBinary;
-				}
-				if (failed) return;
-
-				debug('probe transport "%s" opened', name);
-				transport.send([{ type: 'ping', data: 'probe' }]);
-				transport.once('packet', function (msg) {
-					if (failed) return;
-					if ('pong' == msg.type && 'probe' == msg.data) {
-						debug('probe transport "%s" pong', name);
-						self.upgrading = true;
-						self.emit('upgrading', transport);
-						if (!transport) return;
-						Socket.priorWebsocketSuccess = 'websocket' == transport.name;
-
-						debug('pausing current transport "%s"', self.transport.name);
-						self.transport.pause(function () {
-							if (failed) return;
-							if ('closed' == self.readyState) return;
-							debug('changing transport and sending upgrade packet');
-
-							cleanup();
-
-							self.setTransport(transport);
-							transport.send([{ type: 'upgrade' }]);
-							self.emit('upgrade', transport);
-							transport = null;
-							self.upgrading = false;
-							self.flush();
-						});
-					} else {
-						debug('probe transport "%s" failed', name);
-						var err = new Error('probe error');
-						err.transport = transport.name;
-						self.emit('upgradeError', err);
-					}
-				});
-			}
-
-			function freezeTransport() {
-				if (failed) return;
-
-				// Any callback called by transport should be ignored since now
-				failed = true;
-
-				cleanup();
-
-				transport.close();
-				transport = null;
-			}
-
-			//Handle any error that happens while probing
-			function onerror(err) {
-				var error = new Error('probe error: ' + err);
-				error.transport = transport.name;
-
-				freezeTransport();
-
-				debug('probe transport "%s" failed because of error: %s', name, err);
-
-				self.emit('upgradeError', error);
-			}
-
-			function onTransportClose(){
-				onerror("transport closed");
-			}
-
-			//When the socket is closed while we're probing
-			function onclose(){
-				onerror("socket closed");
-			}
-
-			//When the socket is upgraded while we're probing
-			function onupgrade(to){
-				if (transport && to.name != transport.name) {
-					debug('"%s" works - aborting "%s"', to.name, transport.name);
-					freezeTransport();
-				}
-			}
-
-			//Remove all listeners on the transport and on self
-			function cleanup(){
-				transport.removeListener('open', onTransportOpen);
-				transport.removeListener('error', onerror);
-				transport.removeListener('close', onTransportClose);
-				self.removeListener('close', onclose);
-				self.removeListener('upgrading', onupgrade);
-			}
-
-			transport.once('open', onTransportOpen);
-			transport.once('error', onerror);
-			transport.once('close', onTransportClose);
-
-			this.once('close', onclose);
-			this.once('upgrading', onupgrade);
-
-			transport.open();
-
-		};
-
-		/**
-		 * Called when connection is deemed open.
-		 *
-		 * @api public
-		 */
-
-		Socket.prototype.onOpen = function () {
-			debug('socket open');
-			this.readyState = 'open';
-			Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
-			this.emit('open');
-			this.flush();
-
-			// we check for `readyState` in case an `open`
-			// listener already closed the socket
-			if ('open' == this.readyState && this.upgrade && this.transport.pause) {
-				debug('starting upgrade probes');
-				for (var i = 0, l = this.upgrades.length; i < l; i++) {
-					this.probe(this.upgrades[i]);
-				}
-			}
-		};
-
-		/**
-		 * Handles a packet.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.onPacket = function (packet) {
-			if ('opening' == this.readyState || 'open' == this.readyState) {
-				debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
-
-				this.emit('packet', packet);
-
-				// Socket is live - any packet counts
-				this.emit('heartbeat');
-
-				switch (packet.type) {
-					case 'open':
-						this.onHandshake(parsejson(packet.data));
-						break;
-
-					case 'pong':
-						this.setPing();
-						break;
-
-					case 'error':
-						var err = new Error('server error');
-						err.code = packet.data;
-						this.emit('error', err);
-						break;
-
-					case 'message':
-						this.emit('data', packet.data);
-						this.emit('message', packet.data);
-						break;
-				}
-			} else {
-				debug('packet received with socket readyState "%s"', this.readyState);
-			}
-		};
-
-		/**
-		 * Called upon handshake completion.
-		 *
-		 * @param {Object} handshake obj
-		 * @api private
-		 */
-
-		Socket.prototype.onHandshake = function (data) {
-			this.emit('handshake', data);
-			this.id = data.sid;
-			this.transport.query.sid = data.sid;
-			this.upgrades = this.filterUpgrades(data.upgrades);
-			this.pingInterval = data.pingInterval;
-			this.pingTimeout = data.pingTimeout;
-			this.onOpen();
-			// In case open handler closes socket
-			if  ('closed' == this.readyState) return;
-			this.setPing();
-
-			// Prolong liveness of socket on heartbeat
-			this.removeListener('heartbeat', this.onHeartbeat);
-			this.on('heartbeat', this.onHeartbeat);
-		};
-
-		/**
-		 * Resets ping timeout.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.onHeartbeat = function (timeout) {
-			clearTimeout(this.pingTimeoutTimer);
-			var self = this;
-			self.pingTimeoutTimer = setTimeout(function () {
-				if ('closed' == self.readyState) return;
-				self.onClose('ping timeout');
-			}, timeout || (self.pingInterval + self.pingTimeout));
-		};
-
-		/**
-		 * Pings server every `this.pingInterval` and expects response
-		 * within `this.pingTimeout` or closes connection.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.setPing = function () {
-			var self = this;
-			clearTimeout(self.pingIntervalTimer);
-			self.pingIntervalTimer = setTimeout(function () {
-				debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
-				self.ping();
-				self.onHeartbeat(self.pingTimeout);
-			}, self.pingInterval);
-		};
-
-		/**
-		 * Sends a ping packet.
-		 *
-		 * @api public
-		 */
-
-		Socket.prototype.ping = function () {
-			this.sendPacket('ping');
-		};
-
-		/**
-		 * Called on `drain` event
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.onDrain = function() {
-			for (var i = 0; i < this.prevBufferLen; i++) {
-				if (this.callbackBuffer[i]) {
-					this.callbackBuffer[i]();
-				}
-			}
-
-			this.writeBuffer.splice(0, this.prevBufferLen);
-			this.callbackBuffer.splice(0, this.prevBufferLen);
-
-			// setting prevBufferLen = 0 is very important
-			// for example, when upgrading, upgrade packet is sent over,
-			// and a nonzero prevBufferLen could cause problems on `drain`
-			this.prevBufferLen = 0;
-
-			if (this.writeBuffer.length == 0) {
-				this.emit('drain');
-			} else {
-				this.flush();
-			}
-		};
-
-		/**
-		 * Flush write buffers.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.flush = function () {
-			if ('closed' != this.readyState && this.transport.writable &&
-				!this.upgrading && this.writeBuffer.length) {
-				debug('flushing %d packets in socket', this.writeBuffer.length);
-				this.transport.send(this.writeBuffer);
-				// keep track of current length of writeBuffer
-				// splice writeBuffer and callbackBuffer on `drain`
-				this.prevBufferLen = this.writeBuffer.length;
-				this.emit('flush');
-			}
-		};
-
-		/**
-		 * Sends a message.
-		 *
-		 * @param {String} message.
-		 * @param {Function} callback function.
-		 * @return {Socket} for chaining.
-		 * @api public
-		 */
-
-		Socket.prototype.write =
-			Socket.prototype.send = function (msg, fn) {
-				this.sendPacket('message', msg, fn);
-				return this;
-			};
-
-		/**
-		 * Sends a packet.
-		 *
-		 * @param {String} packet type.
-		 * @param {String} data.
-		 * @param {Function} callback function.
-		 * @api private
-		 */
-
-		Socket.prototype.sendPacket = function (type, data, fn) {
-			if ('closing' == this.readyState || 'closed' == this.readyState) {
-				return;
-			}
-
-			var packet = { type: type, data: data };
-			this.emit('packetCreate', packet);
-			this.writeBuffer.push(packet);
-			this.callbackBuffer.push(fn);
-			this.flush();
-		};
-
-		/**
-		 * Closes the connection.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.close = function () {
-			if ('opening' == this.readyState || 'open' == this.readyState) {
-				this.readyState = 'closing';
-
-				var self = this;
-
-				function close() {
-					self.onClose('forced close');
-					debug('socket closing - telling transport to close');
-					self.transport.close();
-				}
-
-				function cleanupAndClose() {
-					self.removeListener('upgrade', cleanupAndClose);
-					self.removeListener('upgradeError', cleanupAndClose);
-					close();
-				}
-
-				function waitForUpgrade() {
-					// wait for upgrade to finish since we can't send packets while pausing a transport
-					self.once('upgrade', cleanupAndClose);
-					self.once('upgradeError', cleanupAndClose);
-				}
-
-				if (this.writeBuffer.length) {
-					this.once('drain', function() {
-						if (this.upgrading) {
-							waitForUpgrade();
-						} else {
-							close();
-						}
-					});
-				} else if (this.upgrading) {
-					waitForUpgrade();
-				} else {
-					close();
-				}
-			}
-
-			return this;
-		};
-
-		/**
-		 * Called upon transport error
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.onError = function (err) {
-			debug('socket error %j', err);
-			Socket.priorWebsocketSuccess = false;
-			this.emit('error', err);
-			this.onClose('transport error', err);
-		};
-
-		/**
-		 * Called upon transport close.
-		 *
-		 * @api private
-		 */
-
-		Socket.prototype.onClose = function (reason, desc) {
-			if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
-				debug('socket close with reason: "%s"', reason);
-				var self = this;
-
-				// clear timers
-				clearTimeout(this.pingIntervalTimer);
-				clearTimeout(this.pingTimeoutTimer);
-
-				// clean buffers in next tick, so developers can still
-				// grab the buffers on `close` event
-				setTimeout(function() {
-					self.writeBuffer = [];
-					self.callbackBuffer = [];
-					self.prevBufferLen = 0;
-				}, 0);
-
-				// stop event from firing again for transport
-				this.transport.removeAllListeners('close');
-
-				// ensure transport won't stay open
-				this.transport.close();
-
-				// ignore further transport communication
-				this.transport.removeAllListeners();
-
-				// set ready state
-				this.readyState = 'closed';
-
-				// clear session id
-				this.id = null;
-
-				// emit close event
-				this.emit('close', reason, desc);
-			}
-		};
-
-		/**
-		 * Filters upgrades, returning only those matching client transports.
-		 *
-		 * @param {Array} server upgrades
-		 * @api private
-		 *
-		 */
-
-		Socket.prototype.filterUpgrades = function (upgrades) {
-			var filteredUpgrades = [];
-			for (var i = 0, j = upgrades.length; i<j; i++) {
-				if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
-			}
-			return filteredUpgrades;
-		};
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./transport":13,"./transports":14,"component-emitter":8,"debug":20,"engine.io-parser":24,"indexof":44,"parsejson":52,"parseqs":53,"parseuri":23}],13:[function(require,module,exports){
-	/**
-	 * Module dependencies.
-	 */
-
-	var parser = require('engine.io-parser');
-	var Emitter = require('component-emitter');
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = Transport;
-
-	/**
-	 * Transport abstract constructor.
-	 *
-	 * @param {Object} options.
-	 * @api private
-	 */
-
-	function Transport (opts) {
-		this.path = opts.path;
-		this.hostname = opts.hostname;
-		this.port = opts.port;
-		this.secure = opts.secure;
-		this.query = opts.query;
-		this.timestampParam = opts.timestampParam;
-		this.timestampRequests = opts.timestampRequests;
-		this.readyState = '';
-		this.agent = opts.agent || false;
-		this.socket = opts.socket;
-		this.enablesXDR = opts.enablesXDR;
-
-		// SSL options for Node.js client
-		this.pfx = opts.pfx;
-		this.key = opts.key;
-		this.passphrase = opts.passphrase;
-		this.cert = opts.cert;
-		this.ca = opts.ca;
-		this.ciphers = opts.ciphers;
-		this.rejectUnauthorized = opts.rejectUnauthorized;
-	}
-
-	/**
-	 * Mix in `Emitter`.
-	 */
-
-	Emitter(Transport.prototype);
-
-	/**
-	 * A counter used to prevent collisions in the timestamps used
-	 * for cache busting.
-	 */
-
-	Transport.timestamps = 0;
-
-	/**
-	 * Emits an error.
-	 *
-	 * @param {String} str
-	 * @return {Transport} for chaining
-	 * @api public
-	 */
-
-	Transport.prototype.onError = function (msg, desc) {
-		var err = new Error(msg);
-		err.type = 'TransportError';
-		err.description = desc;
-		this.emit('error', err);
-		return this;
-	};
-
-	/**
-	 * Opens the transport.
-	 *
-	 * @api public
-	 */
-
-	Transport.prototype.open = function () {
-		if ('closed' == this.readyState || '' == this.readyState) {
-			this.readyState = 'opening';
-			this.doOpen();
-		}
-
-		return this;
-	};
-
-	/**
-	 * Closes the transport.
-	 *
-	 * @api private
-	 */
-
-	Transport.prototype.close = function () {
-		if ('opening' == this.readyState || 'open' == this.readyState) {
-			this.doClose();
-			this.onClose();
-		}
-
-		return this;
-	};
-
-	/**
-	 * Sends multiple packets.
-	 *
-	 * @param {Array} packets
-	 * @api private
-	 */
-
-	Transport.prototype.send = function(packets){
-		if ('open' == this.readyState) {
-			this.write(packets);
-		} else {
-			throw new Error('Transport not open');
-		}
-	};
-
-	/**
-	 * Called upon open
-	 *
-	 * @api private
-	 */
-
-	Transport.prototype.onOpen = function () {
-		this.readyState = 'open';
-		this.writable = true;
-		this.emit('open');
-	};
-
-	/**
-	 * Called with data.
-	 *
-	 * @param {String} data
-	 * @api private
-	 */
-
-	Transport.prototype.onData = function(data){
-		var packet = parser.decodePacket(data, this.socket.binaryType);
-		this.onPacket(packet);
-	};
-
-	/**
-	 * Called with a decoded packet.
-	 */
-
-	Transport.prototype.onPacket = function (packet) {
-		this.emit('packet', packet);
-	};
-
-	/**
-	 * Called upon close.
-	 *
-	 * @api private
-	 */
-
-	Transport.prototype.onClose = function () {
-		this.readyState = 'closed';
-		this.emit('close');
-	};
-
-},{"component-emitter":8,"engine.io-parser":24}],14:[function(require,module,exports){
-	(function (global){
-		/**
-		 * Module dependencies
-		 */
-
-		var XMLHttpRequest = require('xmlhttprequest');
-		var XHR = require('./polling-xhr');
-		var JSONP = require('./polling-jsonp');
-		var websocket = require('./websocket');
-
-		/**
-		 * Export transports.
-		 */
-
-		exports.polling = polling;
-		exports.websocket = websocket;
-
-		/**
-		 * Polling transport polymorphic constructor.
-		 * Decides on xhr vs jsonp based on feature detection.
-		 *
-		 * @api private
-		 */
-
-		function polling(opts){
-			var xhr;
-			var xd = false;
-			var xs = false;
-			var jsonp = false !== opts.jsonp;
-
-			if (global.location) {
-				var isSSL = 'https:' == location.protocol;
-				var port = location.port;
-
-				// some user agents have empty `location.port`
-				if (!port) {
-					port = isSSL ? 443 : 80;
-				}
-
-				xd = opts.hostname != location.hostname || port != opts.port;
-				xs = opts.secure != isSSL;
-			}
-
-			opts.xdomain = xd;
-			opts.xscheme = xs;
-			xhr = new XMLHttpRequest(opts);
-
-			if ('open' in xhr && !opts.forceJSONP) {
-				return new XHR(opts);
-			} else {
-				if (!jsonp) throw new Error('JSONP disabled');
-				return new JSONP(opts);
-			}
-		}
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./polling-jsonp":15,"./polling-xhr":16,"./websocket":18,"xmlhttprequest":19}],15:[function(require,module,exports){
-	(function (global){
-
-		/**
-		 * Module requirements.
-		 */
-
-		var Polling = require('./polling');
-		var inherit = require('component-inherit');
-
-		/**
-		 * Module exports.
-		 */
-
-		module.exports = JSONPPolling;
-
-		/**
-		 * Cached regular expressions.
-		 */
-
-		var rNewline = /\n/g;
-		var rEscapedNewline = /\\n/g;
-
-		/**
-		 * Global JSONP callbacks.
-		 */
-
-		var callbacks;
-
-		/**
-		 * Callbacks count.
-		 */
-
-		var index = 0;
-
-		/**
-		 * Noop.
-		 */
-
-		function empty () { }
-
-		/**
-		 * JSONP Polling constructor.
-		 *
-		 * @param {Object} opts.
-		 * @api public
-		 */
-
-		function JSONPPolling (opts) {
-			Polling.call(this, opts);
-
-			this.query = this.query || {};
-
-			// define global callbacks array if not present
-			// we do this here (lazily) to avoid unneeded global pollution
-			if (!callbacks) {
-				// we need to consider multiple engines in the same page
-				if (!global.___eio) global.___eio = [];
-				callbacks = global.___eio;
-			}
-
-			// callback identifier
-			this.index = callbacks.length;
-
-			// add callback to jsonp global
-			var self = this;
-			callbacks.push(function (msg) {
-				self.onData(msg);
-			});
-
-			// append to query string
-			this.query.j = this.index;
-
-			// prevent spurious errors from being emitted when the window is unloaded
-			if (global.document && global.addEventListener) {
-				global.addEventListener('beforeunload', function () {
-					if (self.script) self.script.onerror = empty;
-				}, false);
-			}
-		}
-
-		/**
-		 * Inherits from Polling.
-		 */
-
-		inherit(JSONPPolling, Polling);
-
-		/*
-		 * JSONP only supports binary as base64 encoded strings
-		 */
-
-		JSONPPolling.prototype.supportsBinary = false;
-
-		/**
-		 * Closes the socket.
-		 *
-		 * @api private
-		 */
-
-		JSONPPolling.prototype.doClose = function () {
-			if (this.script) {
-				this.script.parentNode.removeChild(this.script);
-				this.script = null;
-			}
-
-			if (this.form) {
-				this.form.parentNode.removeChild(this.form);
-				this.form = null;
-				this.iframe = null;
-			}
-
-			Polling.prototype.doClose.call(this);
-		};
-
-		/**
-		 * Starts a poll cycle.
-		 *
-		 * @api private
-		 */
-
-		JSONPPolling.prototype.doPoll = function () {
-			var self = this;
-			var script = document.createElement('script');
-
-			if (this.script) {
-				this.script.parentNode.removeChild(this.script);
-				this.script = null;
-			}
-
-			script.async = true;
-			script.src = this.uri();
-			script.onerror = function(e){
-				self.onError('jsonp poll error',e);
-			};
-
-			var insertAt = document.getElementsByTagName('script')[0];
-			insertAt.parentNode.insertBefore(script, insertAt);
-			this.script = script;
-
-			var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
-
-			if (isUAgecko) {
-				setTimeout(function () {
-					var iframe = document.createElement('iframe');
-					document.body.appendChild(iframe);
-					document.body.removeChild(iframe);
-				}, 100);
-			}
-		};
-
-		/**
-		 * Writes with a hidden iframe.
-		 *
-		 * @param {String} data to send
-		 * @param {Function} called upon flush.
-		 * @api private
-		 */
-
-		JSONPPolling.prototype.doWrite = function (data, fn) {
-			var self = this;
-
-			if (!this.form) {
-				var form = document.createElement('form');
-				var area = document.createElement('textarea');
-				var id = this.iframeId = 'eio_iframe_' + this.index;
-				var iframe;
-
-				form.className = 'socketio';
-				form.style.position = 'absolute';
-				form.style.top = '-1000px';
-				form.style.left = '-1000px';
-				form.target = id;
-				form.method = 'POST';
-				form.setAttribute('accept-charset', 'utf-8');
-				area.name = 'd';
-				form.appendChild(area);
-				document.body.appendChild(form);
-
-				this.form = form;
-				this.area = area;
-			}
-
-			this.form.action = this.uri();
-
-			function complete () {
-				initIframe();
-				fn();
-			}
-
-			function initIframe () {
-				if (self.iframe) {
-					try {
-						self.form.removeChild(self.iframe);
-					} catch (e) {
-						self.onError('jsonp polling iframe removal error', e);
-					}
-				}
-
-				try {
-					// ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
-					var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
-					iframe = document.createElement(html);
-				} catch (e) {
-					iframe = document.createElement('iframe');
-					iframe.name = self.iframeId;
-					iframe.src = 'javascript:0';
-				}
-
-				iframe.id = self.iframeId;
-
-				self.form.appendChild(iframe);
-				self.iframe = iframe;
-			}
-
-			initIframe();
-
-			// escape \n to prevent it from being converted into \r\n by some UAs
-			// double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
-			data = data.replace(rEscapedNewline, '\\\n');
-			this.area.value = data.replace(rNewline, '\\n');
-
-			try {
-				this.form.submit();
-			} catch(e) {}
-
-			if (this.iframe.attachEvent) {
-				this.iframe.onreadystatechange = function(){
-					if (self.iframe.readyState == 'complete') {
-						complete();
-					}
-				};
-			} else {
-				this.iframe.onload = complete;
-			}
-		};
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./polling":17,"component-inherit":9}],16:[function(require,module,exports){
-	(function (global){
-		/**
-		 * Module requirements.
-		 */
-
-		var XMLHttpRequest = require('xmlhttprequest');
-		var Polling = require('./polling');
-		var Emitter = require('component-emitter');
-		var inherit = require('component-inherit');
-		var debug = require('debug')('engine.io-client:polling-xhr');
-
-		/**
-		 * Module exports.
-		 */
-
-		module.exports = XHR;
-		module.exports.Request = Request;
-
-		/**
-		 * Empty function
-		 */
-
-		function empty(){}
-
-		/**
-		 * XHR Polling constructor.
-		 *
-		 * @param {Object} opts
-		 * @api public
-		 */
-
-		function XHR(opts){
-			Polling.call(this, opts);
-
-			if (global.location) {
-				var isSSL = 'https:' == location.protocol;
-				var port = location.port;
-
-				// some user agents have empty `location.port`
-				if (!port) {
-					port = isSSL ? 443 : 80;
-				}
-
-				this.xd = opts.hostname != global.location.hostname ||
-					port != opts.port;
-				this.xs = opts.secure != isSSL;
-			}
-		}
-
-		/**
-		 * Inherits from Polling.
-		 */
-
-		inherit(XHR, Polling);
-
-		/**
-		 * XHR supports binary
-		 */
-
-		XHR.prototype.supportsBinary = true;
-
-		/**
-		 * Creates a request.
-		 *
-		 * @param {String} method
-		 * @api private
-		 */
-
-		XHR.prototype.request = function(opts){
-			opts = opts || {};
-			opts.uri = this.uri();
-			opts.xd = this.xd;
-			opts.xs = this.xs;
-			opts.agent = this.agent || false;
-			opts.supportsBinary = this.supportsBinary;
-			opts.enablesXDR = this.enablesXDR;
-
-			// SSL options for Node.js client
-			opts.pfx = this.pfx;
-			opts.key = this.key;
-			opts.passphrase = this.passphrase;
-			opts.cert = this.cert;
-			opts.ca = this.ca;
-			opts.ciphers = this.ciphers;
-			opts.rejectUnauthorized = this.rejectUnauthorized;
-
-			return new Request(opts);
-		};
-
-		/**
-		 * Sends data.
-		 *
-		 * @param {String} data to send.
-		 * @param {Function} called upon flush.
-		 * @api private
-		 */
-
-		XHR.prototype.doWrite = function(data, fn){
-			var isBinary = typeof data !== 'string' && data !== undefined;
-			var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
-			var self = this;
-			req.on('success', fn);
-			req.on('error', function(err){
-				self.onError('xhr post error', err);
-			});
-			this.sendXhr = req;
-		};
-
-		/**
-		 * Starts a poll cycle.
-		 *
-		 * @api private
-		 */
-
-		XHR.prototype.doPoll = function(){
-			debug('xhr poll');
-			var req = this.request();
-			var self = this;
-			req.on('data', function(data){
-				self.onData(data);
-			});
-			req.on('error', function(err){
-				self.onError('xhr poll error', err);
-			});
-			this.pollXhr = req;
-		};
-
-		/**
-		 * Request constructor
-		 *
-		 * @param {Object} options
-		 * @api public
-		 */
-
-		function Request(opts){
-			this.method = opts.method || 'GET';
-			this.uri = opts.uri;
-			this.xd = !!opts.xd;
-			this.xs = !!opts.xs;
-			this.async = false !== opts.async;
-			this.data = undefined != opts.data ? opts.data : null;
-			this.agent = opts.agent;
-			this.isBinary = opts.isBinary;
-			this.supportsBinary = opts.supportsBinary;
-			this.enablesXDR = opts.enablesXDR;
-
-			// SSL options for Node.js client
-			this.pfx = opts.pfx;
-			this.key = opts.key;
-			this.passphrase = opts.passphrase;
-			this.cert = opts.cert;
-			this.ca = opts.ca;
-			this.ciphers = opts.ciphers;
-			this.rejectUnauthorized = opts.rejectUnauthorized;
-
-			this.create();
-		}
-
-		/**
-		 * Mix in `Emitter`.
-		 */
-
-		Emitter(Request.prototype);
-
-		/**
-		 * Creates the XHR object and sends the request.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.create = function(){
-			var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };
-
-			// SSL options for Node.js client
-			opts.pfx = this.pfx;
-			opts.key = this.key;
-			opts.passphrase = this.passphrase;
-			opts.cert = this.cert;
-			opts.ca = this.ca;
-			opts.ciphers = this.ciphers;
-			opts.rejectUnauthorized = this.rejectUnauthorized;
-
-			var xhr = this.xhr = new XMLHttpRequest(opts);
-			var self = this;
-
-			try {
-				debug('xhr open %s: %s', this.method, this.uri);
-				xhr.open(this.method, this.uri, this.async);
-				if (this.supportsBinary) {
-					// This has to be done after open because Firefox is stupid
-					// http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
-					xhr.responseType = 'arraybuffer';
-				}
-
-				if ('POST' == this.method) {
-					try {
-						if (this.isBinary) {
-							xhr.setRequestHeader('Content-type', 'application/octet-stream');
-						} else {
-							xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
-						}
-					} catch (e) {}
-				}
-
-				// ie6 check
-				if ('withCredentials' in xhr) {
-					xhr.withCredentials = true;
-				}
-
-				if (this.hasXDR()) {
-					xhr.onload = function(){
-						self.onLoad();
-					};
-					xhr.onerror = function(){
-						self.onError(xhr.responseText);
-					};
-				} else {
-					xhr.onreadystatechange = function(){
-						if (4 != xhr.readyState) return;
-						if (200 == xhr.status || 1223 == xhr.status) {
-							self.onLoad();
-						} else {
-							// make sure the `error` event handler that's user-set
-							// does not throw in the same tick and gets caught here
-							setTimeout(function(){
-								self.onError(xhr.status);
-							}, 0);
-						}
-					};
-				}
-
-				debug('xhr data %s', this.data);
-				xhr.send(this.data);
-			} catch (e) {
-				// Need to defer since .create() is called directly fhrom the constructor
-				// and thus the 'error' event can only be only bound *after* this exception
-				// occurs.  Therefore, also, we cannot throw here at all.
-				setTimeout(function() {
-					self.onError(e);
-				}, 0);
-				return;
-			}
-
-			if (global.document) {
-				this.index = Request.requestsCount++;
-				Request.requests[this.index] = this;
-			}
-		};
-
-		/**
-		 * Called upon successful response.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.onSuccess = function(){
-			this.emit('success');
-			this.cleanup();
-		};
-
-		/**
-		 * Called if we have data.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.onData = function(data){
-			this.emit('data', data);
-			this.onSuccess();
-		};
-
-		/**
-		 * Called upon error.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.onError = function(err){
-			this.emit('error', err);
-			this.cleanup(true);
-		};
-
-		/**
-		 * Cleans up house.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.cleanup = function(fromError){
-			if ('undefined' == typeof this.xhr || null === this.xhr) {
-				return;
-			}
-			// xmlhttprequest
-			if (this.hasXDR()) {
-				this.xhr.onload = this.xhr.onerror = empty;
-			} else {
-				this.xhr.onreadystatechange = empty;
-			}
-
-			if (fromError) {
-				try {
-					this.xhr.abort();
-				} catch(e) {}
-			}
-
-			if (global.document) {
-				delete Request.requests[this.index];
-			}
-
-			this.xhr = null;
-		};
-
-		/**
-		 * Called upon load.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.onLoad = function(){
-			var data;
-			try {
-				var contentType;
-				try {
-					contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
-				} catch (e) {}
-				if (contentType === 'application/octet-stream') {
-					data = this.xhr.response;
-				} else {
-					if (!this.supportsBinary) {
-						data = this.xhr.responseText;
-					} else {
-						data = 'ok';
-					}
-				}
-			} catch (e) {
-				this.onError(e);
-			}
-			if (null != data) {
-				this.onData(data);
-			}
-		};
-
-		/**
-		 * Check if it has XDomainRequest.
-		 *
-		 * @api private
-		 */
-
-		Request.prototype.hasXDR = function(){
-			return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
-		};
-
-		/**
-		 * Aborts the request.
-		 *
-		 * @api public
-		 */
-
-		Request.prototype.abort = function(){
-			this.cleanup();
-		};
-
-		/**
-		 * Aborts pending requests when unloading the window. This is needed to prevent
-		 * memory leaks (e.g. when using IE) and to ensure that no spurious error is
-		 * emitted.
-		 */
-
-		if (global.document) {
-			Request.requestsCount = 0;
-			Request.requests = {};
-			if (global.attachEvent) {
-				global.attachEvent('onunload', unloadHandler);
-			} else if (global.addEventListener) {
-				global.addEventListener('beforeunload', unloadHandler, false);
-			}
-		}
-
-		function unloadHandler() {
-			for (var i in Request.requests) {
-				if (Request.requests.hasOwnProperty(i)) {
-					Request.requests[i].abort();
-				}
-			}
-		}
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./polling":17,"component-emitter":8,"component-inherit":9,"debug":20,"xmlhttprequest":19}],17:[function(require,module,exports){
-	/**
-	 * Module dependencies.
-	 */
-
-	var Transport = require('../transport');
-	var parseqs = require('parseqs');
-	var parser = require('engine.io-parser');
-	var inherit = require('component-inherit');
-	var debug = require('debug')('engine.io-client:polling');
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = Polling;
-
-	/**
-	 * Is XHR2 supported?
-	 */
-
-	var hasXHR2 = (function() {
-		var XMLHttpRequest = require('xmlhttprequest');
-		var xhr = new XMLHttpRequest({ xdomain: false });
-		return null != xhr.responseType;
-	})();
-
-	/**
-	 * Polling interface.
-	 *
-	 * @param {Object} opts
-	 * @api private
-	 */
-
-	function Polling(opts){
-		var forceBase64 = (opts && opts.forceBase64);
-		if (!hasXHR2 || forceBase64) {
-			this.supportsBinary = false;
-		}
-		Transport.call(this, opts);
-	}
-
-	/**
-	 * Inherits from Transport.
-	 */
-
-	inherit(Polling, Transport);
-
-	/**
-	 * Transport name.
-	 */
-
-	Polling.prototype.name = 'polling';
-
-	/**
-	 * Opens the socket (triggers polling). We write a PING message to determine
-	 * when the transport is open.
-	 *
-	 * @api private
-	 */
-
-	Polling.prototype.doOpen = function(){
-		this.poll();
-	};
-
-	/**
-	 * Pauses polling.
-	 *
-	 * @param {Function} callback upon buffers are flushed and transport is paused
-	 * @api private
-	 */
-
-	Polling.prototype.pause = function(onPause){
-		var pending = 0;
-		var self = this;
-
-		this.readyState = 'pausing';
-
-		function pause(){
-			debug('paused');
-			self.readyState = 'paused';
-			onPause();
-		}
-
-		if (this.polling || !this.writable) {
-			var total = 0;
-
-			if (this.polling) {
-				debug('we are currently polling - waiting to pause');
-				total++;
-				this.once('pollComplete', function(){
-					debug('pre-pause polling complete');
-					--total || pause();
-				});
-			}
-
-			if (!this.writable) {
-				debug('we are currently writing - waiting to pause');
-				total++;
-				this.once('drain', function(){
-					debug('pre-pause writing complete');
-					--total || pause();
-				});
-			}
-		} else {
-			pause();
-		}
-	};
-
-	/**
-	 * Starts polling cycle.
-	 *
-	 * @api public
-	 */
-
-	Polling.prototype.poll = function(){
-		debug('polling');
-		this.polling = true;
-		this.doPoll();
-		this.emit('poll');
-	};
-
-	/**
-	 * Overloads onData to detect payloads.
-	 *
-	 * @api private
-	 */
-
-	Polling.prototype.onData = function(data){
-		var self = this;
-		debug('polling got data %s', data);
-		var callback = function(packet, index, total) {
-			// if its the first message we consider the transport open
-			if ('opening' == self.readyState) {
-				self.onOpen();
-			}
-
-			// if its a close packet, we close the ongoing requests
-			if ('close' == packet.type) {
-				self.onClose();
-				return false;
-			}
-
-			// otherwise bypass onData and handle the message
-			self.onPacket(packet);
-		};
-
-		// decode payload
-		parser.decodePayload(data, this.socket.binaryType, callback);
-
-		// if an event did not trigger closing
-		if ('closed' != this.readyState) {
-			// if we got data we're not polling
-			this.polling = false;
-			this.emit('pollComplete');
-
-			if ('open' == this.readyState) {
-				this.poll();
-			} else {
-				debug('ignoring poll - transport state "%s"', this.readyState);
-			}
-		}
-	};
-
-	/**
-	 * For polling, send a close packet.
-	 *
-	 * @api private
-	 */
-
-	Polling.prototype.doClose = function(){
-		var self = this;
-
-		function close(){
-			debug('writing close packet');
-			self.write([{ type: 'close' }]);
-		}
-
-		if ('open' == this.readyState) {
-			debug('transport open - closing');
-			close();
-		} else {
-			// in case we're trying to close while
-			// handshaking is in progress (GH-164)
-			debug('transport not open - deferring close');
-			this.once('open', close);
-		}
-	};
-
-	/**
-	 * Writes a packets payload.
-	 *
-	 * @param {Array} data packets
-	 * @param {Function} drain callback
-	 * @api private
-	 */
-
-	Polling.prototype.write = function(packets){
-		var self = this;
-		this.writable = false;
-		var callbackfn = function() {
-			self.writable = true;
-			self.emit('drain');
-		};
-
-		var self = this;
-		parser.encodePayload(packets, this.supportsBinary, function(data) {
-			self.doWrite(data, callbackfn);
-		});
-	};
-
-	/**
-	 * Generates uri for connection.
-	 *
-	 * @api private
-	 */
-
-	Polling.prototype.uri = function(){
-		var query = this.query || {};
-		var schema = this.secure ? 'https' : 'http';
-		var port = '';
-
-		// cache busting is forced
-		if (false !== this.timestampRequests) {
-			query[this.timestampParam] = +new Date + '-' + Transport.timestamps++;
-		}
-
-		if (!this.supportsBinary && !query.sid) {
-			query.b64 = 1;
-		}
-
-		query = parseqs.encode(query);
-
-		// avoid port if default for schema
-		if (this.port && (('https' == schema && this.port != 443) ||
-			('http' == schema && this.port != 80))) {
-			port = ':' + this.port;
-		}
-
-		// prepend ? to query
-		if (query.length) {
-			query = '?' + query;
-		}
-
-		return schema + '://' + this.hostname + port + this.path + query;
-	};
-
-},{"../transport":13,"component-inherit":9,"debug":20,"engine.io-parser":24,"parseqs":53,"xmlhttprequest":19}],18:[function(require,module,exports){
-	/**
-	 * Module dependencies.
-	 */
-
-	var Transport = require('../transport');
-	var parser = require('engine.io-parser');
-	var parseqs = require('parseqs');
-	var inherit = require('component-inherit');
-	var debug = require('debug')('engine.io-client:websocket');
-
-	/**
-	 * `ws` exposes a WebSocket-compatible interface in
-	 * Node, or the `WebSocket` or `MozWebSocket` globals
-	 * in the browser.
-	 */
-
-	var WebSocket = require('ws');
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = WS;
-
-	/**
-	 * WebSocket transport constructor.
-	 *
-	 * @api {Object} connection options
-	 * @api public
-	 */
-
-	function WS(opts){
-		var forceBase64 = (opts && opts.forceBase64);
-		if (forceBase64) {
-			this.supportsBinary = false;
-		}
-		Transport.call(this, opts);
-	}
-
-	/**
-	 * Inherits from Transport.
-	 */
-
-	inherit(WS, Transport);
-
-	/**
-	 * Transport name.
-	 *
-	 * @api public
-	 */
-
-	WS.prototype.name = 'websocket';
-
-	/*
-	 * WebSockets support binary
-	 */
-
-	WS.prototype.supportsBinary = true;
-
-	/**
-	 * Opens socket.
-	 *
-	 * @api private
-	 */
-
-	WS.prototype.doOpen = function(){
-		if (!this.check()) {
-			// let probe timeout
-			return;
-		}
-
-		var self = this;
-		var uri = this.uri();
-		var protocols = void(0);
-		var opts = { agent: this.agent };
-
-		// SSL options for Node.js client
-		opts.pfx = this.pfx;
-		opts.key = this.key;
-		opts.passphrase = this.passphrase;
-		opts.cert = this.cert;
-		opts.ca = this.ca;
-		opts.ciphers = this.ciphers;
-		opts.rejectUnauthorized = this.rejectUnauthorized;
-
-		this.ws = new WebSocket(uri, protocols, opts);
-
-		if (this.ws.binaryType === undefined) {
-			this.supportsBinary = false;
-		}
-
-		this.ws.binaryType = 'arraybuffer';
-		this.addEventListeners();
-	};
-
-	/**
-	 * Adds event listeners to the socket
-	 *
-	 * @api private
-	 */
-
-	WS.prototype.addEventListeners = function(){
-		var self = this;
-
-		this.ws.onopen = function(){
-			self.onOpen();
-		};
-		this.ws.onclose = function(){
-			self.onClose();
-		};
-		this.ws.onmessage = function(ev){
-			self.onData(ev.data);
-		};
-		this.ws.onerror = function(e){
-			self.onError('websocket error', e);
-		};
-	};
-
-	/**
-	 * Override `onData` to use a timer on iOS.
-	 * See: https://gist.github.com/mloughran/2052006
-	 *
-	 * @api private
-	 */
-
-	if ('undefined' != typeof navigator
-		&& /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
-		WS.prototype.onData = function(data){
-			var self = this;
-			setTimeout(function(){
-				Transport.prototype.onData.call(self, data);
-			}, 0);
-		};
-	}
-
-	/**
-	 * Writes data to socket.
-	 *
-	 * @param {Array} array of packets.
-	 * @api private
-	 */
-
-	WS.prototype.write = function(packets){
-		var self = this;
-		this.writable = false;
-		// encodePacket efficient as it uses WS framing
-		// no need for encodePayload
-		for (var i = 0, l = packets.length; i < l; i++) {
-			parser.encodePacket(packets[i], this.supportsBinary, function(data) {
-				//Sometimes the websocket has already been closed but the browser didn't
-				//have a chance of informing us about it yet, in that case send will
-				//throw an error
-				try {
-					self.ws.send(data);
-				} catch (e){
-					debug('websocket closed before onclose event');
-				}
-			});
-		}
-
-		function ondrain() {
-			self.writable = true;
-			self.emit('drain');
-		}
-		// fake drain
-		// defer to next tick to allow Socket to clear writeBuffer
-		setTimeout(ondrain, 0);
-	};
-
-	/**
-	 * Called upon close
-	 *
-	 * @api private
-	 */
-
-	WS.prototype.onClose = function(){
-		Transport.prototype.onClose.call(this);
-	};
-
-	/**
-	 * Closes socket.
-	 *
-	 * @api private
-	 */
-
-	WS.prototype.doClose = function(){
-		if (typeof this.ws !== 'undefined') {
-			this.ws.close();
-		}
-	};
-
-	/**
-	 * Generates uri for connection.
-	 *
-	 * @api private
-	 */
-
-	WS.prototype.uri = function(){
-		var query = this.query || {};
-		var schema = this.secure ? 'wss' : 'ws';
-		var port = '';
-
-		// avoid port if default for schema
-		if (this.port && (('wss' == schema && this.port != 443)
-			|| ('ws' == schema && this.port != 80))) {
-			port = ':' + this.port;
-		}
-
-		// append timestamp to URI
-		if (this.timestampRequests) {
-			query[this.timestampParam] = +new Date;
-		}
-
-		// communicate binary support capabilities
-		if (!this.supportsBinary) {
-			query.b64 = 1;
-		}
-
-		query = parseqs.encode(query);
-
-		// prepend ? to query
-		if (query.length) {
-			query = '?' + query;
-		}
-
-		return schema + '://' + this.hostname + port + this.path + query;
-	};
-
-	/**
-	 * Feature detection for WebSocket.
-	 *
-	 * @return {Boolean} whether this transport is available.
-	 * @api public
-	 */
-
-	WS.prototype.check = function(){
-		return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
-	};
-
-},{"../transport":13,"component-inherit":9,"debug":20,"engine.io-parser":24,"parseqs":53,"ws":101}],19:[function(require,module,exports){
-// browser shim for xmlhttprequest module
-	var hasCORS = require('has-cors');
-
-	module.exports = function(opts) {
-		var xdomain = opts.xdomain;
-
-		// scheme must be same when usign XDomainRequest
-		// http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
-		var xscheme = opts.xscheme;
-
-		// XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
-		// https://github.com/Automattic/engine.io-client/pull/217
-		var enablesXDR = opts.enablesXDR;
-
-		// XMLHttpRequest can be disabled on IE
-		try {
-			if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
-				return new XMLHttpRequest();
-			}
-		} catch (e) { }
-
-		// Use XDomainRequest for IE8 if enablesXDR is true
-		// because loading bar keeps flashing when using jsonp-polling
-		// https://github.com/yujiosaka/socke.io-ie8-loading-example
-		try {
-			if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
-				return new XDomainRequest();
-			}
-		} catch (e) { }
-
-		if (!xdomain) {
-			try {
-				return new ActiveXObject('Microsoft.XMLHTTP');
-			} catch(e) { }
-		}
-	}
-
-},{"has-cors":43}],20:[function(require,module,exports){
-
-	/**
-	 * This is the web browser implementation of `debug()`.
-	 *
-	 * Expose `debug()` as the module.
-	 */
-
-	exports = module.exports = require('./debug');
-	exports.log = log;
-	exports.formatArgs = formatArgs;
-	exports.save = save;
-	exports.load = load;
-	exports.useColors = useColors;
-
-	/**
-	 * Colors.
-	 */
-
-	exports.colors = [
-		'lightseagreen',
-		'forestgreen',
-		'goldenrod',
-		'dodgerblue',
-		'darkorchid',
-		'crimson'
-	];
-
-	/**
-	 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
-	 * and the Firebug extension (any Firefox version) are known
-	 * to support "%c" CSS customizations.
-	 *
-	 * TODO: add a `localStorage` variable to explicitly enable/disable colors
-	 */
-
-	function useColors() {
-		// is webkit? http://stackoverflow.com/a/16459606/376773
-		return ('WebkitAppearance' in document.documentElement.style) ||
-			// is firebug? http://stackoverflow.com/a/398120/376773
-			(window.console && (console.firebug || (console.exception && console.table))) ||
-			// is firefox >= v31?
-			// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
-			(navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
-	}
-
-	/**
-	 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
-	 */
-
-	exports.formatters.j = function(v) {
-		return JSON.stringify(v);
-	};
-
-
-	/**
-	 * Colorize log arguments if enabled.
-	 *
-	 * @api public
-	 */
-
-	function formatArgs() {
-		var args = arguments;
-		var useColors = this.useColors;
-
-		args[0] = (useColors ? '%c' : '')
-			+ this.namespace
-			+ (useColors ? ' %c' : ' ')
-			+ args[0]
-			+ (useColors ? '%c ' : ' ')
-			+ '+' + exports.humanize(this.diff);
-
-		if (!useColors) return args;
-
-		var c = 'color: ' + this.color;
-		args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));
-
-		// the final "%c" is somewhat tricky, because there could be other
-		// arguments passed either before or after the %c, so we need to
-		// figure out the correct index to insert the CSS into
-		var index = 0;
-		var lastC = 0;
-		args[0].replace(/%[a-z%]/g, function(match) {
-			if ('%%' === match) return;
-			index++;
-			if ('%c' === match) {
-				// we only are interested in the *last* %c
-				// (the user may have provided their own)
-				lastC = index;
-			}
-		});
-
-		args.splice(lastC, 0, c);
-		return args;
-	}
-
-	/**
-	 * Invokes `console.log()` when available.
-	 * No-op when `console.log` is not a "function".
-	 *
-	 * @api public
-	 */
-
-	function log() {
-		// This hackery is required for IE8,
-		// where the `console.log` function doesn't have 'apply'
-		return 'object' == typeof console
-			&& 'function' == typeof console.log
-			&& Function.prototype.apply.call(console.log, console, arguments);
-	}
-
-	/**
-	 * Save `namespaces`.
-	 *
-	 * @param {String} namespaces
-	 * @api private
-	 */
-
-	function save(namespaces) {
-		try {
-			if (null == namespaces) {
-				localStorage.removeItem('debug');
-			} else {
-				localStorage.debug = namespaces;
-			}
-		} catch(e) {}
-	}
-
-	/**
-	 * Load `namespaces`.
-	 *
-	 * @return {String} returns the previously persisted debug modes
-	 * @api private
-	 */
-
-	function load() {
-		var r;
-		try {
-			r = localStorage.debug;
-		} catch(e) {}
-		return r;
-	}
-
-	/**
-	 * Enable namespaces listed in `localStorage.debug` initially.
-	 */
-
-	exports.enable(load());
-
-},{"./debug":21}],21:[function(require,module,exports){
-
-	/**
-	 * This is the common logic for both the Node.js and web browser
-	 * implementations of `debug()`.
-	 *
-	 * Expose `debug()` as the module.
-	 */
-
-	exports = module.exports = debug;
-	exports.coerce = coerce;
-	exports.disable = disable;
-	exports.enable = enable;
-	exports.enabled = enabled;
-	exports.humanize = require('ms');
-
-	/**
-	 * The currently active debug mode names, and names to skip.
-	 */
-
-	exports.names = [];
-	exports.skips = [];
-
-	/**
-	 * Map of special "%n" handling functions, for the debug "format" argument.
-	 *
-	 * Valid key names are a single, lowercased letter, i.e. "n".
-	 */
-
-	exports.formatters = {};
-
-	/**
-	 * Previously assigned color.
-	 */
-
-	var prevColor = 0;
-
-	/**
-	 * Previous log timestamp.
-	 */
-
-	var prevTime;
-
-	/**
-	 * Select a color.
-	 *
-	 * @return {Number}
-	 * @api private
-	 */
-
-	function selectColor() {
-		return exports.colors[prevColor++ % exports.colors.length];
-	}
-
-	/**
-	 * Create a debugger with the given `namespace`.
-	 *
-	 * @param {String} namespace
-	 * @return {Function}
-	 * @api public
-	 */
-
-	function debug(namespace) {
-
-		// define the `disabled` version
-		function disabled() {
-		}
-		disabled.enabled = false;
-
-		// define the `enabled` version
-		function enabled() {
-
-			var self = enabled;
-
-			// set `diff` timestamp
-			var curr = +new Date();
-			var ms = curr - (prevTime || curr);
-			self.diff = ms;
-			self.prev = prevTime;
-			self.curr = curr;
-			prevTime = curr;
-
-			// add the `color` if not set
-			if (null == self.useColors) self.useColors = exports.useColors();
-			if (null == self.color && self.useColors) self.color = selectColor();
-
-			var args = Array.prototype.slice.call(arguments);
-
-			args[0] = exports.coerce(args[0]);
-
-			if ('string' !== typeof args[0]) {
-				// anything else let's inspect with %o
-				args = ['%o'].concat(args);
-			}
-
-			// apply any `formatters` transformations
-			var index = 0;
-			args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
-				// if we encounter an escaped % then don't increase the array index
-				if (match === '%%') return match;
-				index++;
-				var formatter = exports.formatters[format];
-				if ('function' === typeof formatter) {
-					var val = args[index];
-					match = formatter.call(self, val);
-
-					// now we need to remove `args[index]` since it's inlined in the `format`
-					args.splice(index, 1);
-					index--;
-				}
-				return match;
-			});
-
-			if ('function' === typeof exports.formatArgs) {
-				args = exports.formatArgs.apply(self, args);
-			}
-			var logFn = enabled.log || exports.log || console.log.bind(console);
-			logFn.apply(self, args);
-		}
-		enabled.enabled = true;
-
-		var fn = exports.enabled(namespace) ? enabled : disabled;
-
-		fn.namespace = namespace;
-
-		return fn;
-	}
-
-	/**
-	 * Enables a debug mode by namespaces. This can include modes
-	 * separated by a colon and wildcards.
-	 *
-	 * @param {String} namespaces
-	 * @api public
-	 */
-
-	function enable(namespaces) {
-		exports.save(namespaces);
-
-		var split = (namespaces || '').split(/[\s,]+/);
-		var len = split.length;
-
-		for (var i = 0; i < len; i++) {
-			if (!split[i]) continue; // ignore empty strings
-			namespaces = split[i].replace(/\*/g, '.*?');
-			if (namespaces[0] === '-') {
-				exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
-			} else {
-				exports.names.push(new RegExp('^' + namespaces + '$'));
-			}
-		}
-	}
-
-	/**
-	 * Disable debug output.
-	 *
-	 * @api public
-	 */
-
-	function disable() {
-		exports.enable('');
-	}
-
-	/**
-	 * Returns true if the given mode name is enabled, false otherwise.
-	 *
-	 * @param {String} name
-	 * @return {Boolean}
-	 * @api public
-	 */
-
-	function enabled(name) {
-		var i, len;
-		for (i = 0, len = exports.skips.length; i < len; i++) {
-			if (exports.skips[i].test(name)) {
-				return false;
-			}
-		}
-		for (i = 0, len = exports.names.length; i < len; i++) {
-			if (exports.names[i].test(name)) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	/**
-	 * Coerce `val`.
-	 *
-	 * @param {Mixed} val
-	 * @return {Mixed}
-	 * @api private
-	 */
-
-	function coerce(val) {
-		if (val instanceof Error) return val.stack || val.message;
-		return val;
-	}
-
-},{"ms":22}],22:[function(require,module,exports){
-	/**
-	 * Helpers.
-	 */
-
-	var s = 1000;
-	var m = s * 60;
-	var h = m * 60;
-	var d = h * 24;
-	var y = d * 365.25;
-
-	/**
-	 * Parse or format the given `val`.
-	 *
-	 * Options:
-	 *
-	 *  - `long` verbose formatting [false]
-	 *
-	 * @param {String|Number} val
-	 * @param {Object} options
-	 * @return {String|Number}
-	 * @api public
-	 */
-
-	module.exports = function(val, options){
-		options = options || {};
-		if ('string' == typeof val) return parse(val);
-		return options.long
-			? long(val)
-			: short(val);
-	};
-
-	/**
-	 * Parse the given `str` and return milliseconds.
-	 *
-	 * @param {String} str
-	 * @return {Number}
-	 * @api private
-	 */
-
-	function parse(str) {
-		var match = /^((?:\d+)?\.?\d+) *(ms|seconds?|s|minutes?|m|hours?|h|days?|d|years?|y)?$/i.exec(str);
-		if (!match) return;
-		var n = parseFloat(match[1]);
-		var type = (match[2] || 'ms').toLowerCase();
-		switch (type) {
-			case 'years':
-			case 'year':
-			case 'y':
-				return n * y;
-			case 'days':
-			case 'day':
-			case 'd':
-				return n * d;
-			case 'hours':
-			case 'hour':
-			case 'h':
-				return n * h;
-			case 'minutes':
-			case 'minute':
-			case 'm':
-				return n * m;
-			case 'seconds':
-			case 'second':
-			case 's':
-				return n * s;
-			case 'ms':
-				return n;
-		}
-	}
-
-	/**
-	 * Short format for `ms`.
-	 *
-	 * @param {Number} ms
-	 * @return {String}
-	 * @api private
-	 */
-
-	function short(ms) {
-		if (ms >= d) return Math.round(ms / d) + 'd';
-		if (ms >= h) return Math.round(ms / h) + 'h';
-		if (ms >= m) return Math.round(ms / m) + 'm';
-		if (ms >= s) return Math.round(ms / s) + 's';
-		return ms + 'ms';
-	}
-
-	/**
-	 * Long format for `ms`.
-	 *
-	 * @param {Number} ms
-	 * @return {String}
-	 * @api private
-	 */
-
-	function long(ms) {
-		return plural(ms, d, 'day')
-			|| plural(ms, h, 'hour')
-			|| plural(ms, m, 'minute')
-			|| plural(ms, s, 'second')
-			|| ms + ' ms';
-	}
-
-	/**
-	 * Pluralization helper.
-	 */
-
-	function plural(ms, n, name) {
-		if (ms < n) return;
-		if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
-		return Math.ceil(ms / n) + ' ' + name + 's';
-	}
-
-},{}],23:[function(require,module,exports){
-	/**
-	 * Parses an URI
-	 *
-	 * @author Steven Levithan <stevenlevithan.com> (MIT license)
-	 * @api private
-	 */
-
-	var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
-
-	var parts = [
-		'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
-	];
-
-	module.exports = function parseuri(str) {
-		var src = str,
-			b = str.indexOf('['),
-			e = str.indexOf(']');
-
-		if (b != -1 && e != -1) {
-			str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
-		}
-
-		var m = re.exec(str || ''),
-			uri = {},
-			i = 14;
-
-		while (i--) {
-			uri[parts[i]] = m[i] || '';
-		}
-
-		if (b != -1 && e != -1) {
-			uri.source = src;
-			uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
-			uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
-			uri.ipv6uri = true;
-		}
-
-		return uri;
-	};
-
-},{}],24:[function(require,module,exports){
-	(function (global){
-		/**
-		 * Module dependencies.
-		 */
-
-		var keys = require('./keys');
-		var hasBinary = require('has-binary');
-		var sliceBuffer = require('arraybuffer.slice');
-		var base64encoder = require('base64-arraybuffer');
-		var after = require('after');
-		var utf8 = require('utf8');
-
-		/**
-		 * Check if we are running an android browser. That requires us to use
-		 * ArrayBuffer with polling transports...
-		 *
-		 * http://ghinda.net/jpeg-blob-ajax-android/
-		 */
-
-		var isAndroid = navigator.userAgent.match(/Android/i);
-
-		/**
-		 * Check if we are running in PhantomJS.
-		 * Uploading a Blob with PhantomJS does not work correctly, as reported here:
-		 * https://github.com/ariya/phantomjs/issues/11395
-		 * @type boolean
-		 */
-		var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);
-
-		/**
-		 * When true, avoids using Blobs to encode payloads.
-		 * @type boolean
-		 */
-		var dontSendBlobs = isAndroid || isPhantomJS;
-
-		/**
-		 * Current protocol version.
-		 */
-
-		exports.protocol = 3;
-
-		/**
-		 * Packet types.
-		 */
-
-		var packets = exports.packets = {
-			open:     0    // non-ws
-			, close:    1    // non-ws
-			, ping:     2
-			, pong:     3
-			, message:  4
-			, upgrade:  5
-			, noop:     6
-		};
-
-		var packetslist = keys(packets);
-
-		/**
-		 * Premade error packet.
-		 */
-
-		var err = { type: 'error', data: 'parser error' };
-
-		/**
-		 * Create a blob api even for blob builder when vendor prefixes exist
-		 */
-
-		var Blob = require('blob');
-
-		/**
-		 * Encodes a packet.
-		 *
-		 *     <packet type id> [ <data> ]
-		 *
-		 * Example:
-		 *
-		 *     5hello world
-		 *     3
-		 *     4
-		 *
-		 * Binary is encoded in an identical principle
-		 *
-		 * @api private
-		 */
-
-		exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
-			if ('function' == typeof supportsBinary) {
-				callback = supportsBinary;
-				supportsBinary = false;
-			}
-
-			if ('function' == typeof utf8encode) {
-				callback = utf8encode;
-				utf8encode = null;
-			}
-
-			var data = (packet.data === undefined)
-				? undefined
-				: packet.data.buffer || packet.data;
-
-			if (global.ArrayBuffer && data instanceof ArrayBuffer) {
-				return encodeArrayBuffer(packet, supportsBinary, callback);
-			} else if (Blob && data instanceof global.Blob) {
-				return encodeBlob(packet, supportsBinary, callback);
-			}
-
-			// might be an object with { base64: true, data: dataAsBase64String }
-			if (data && data.base64) {
-				return encodeBase64Object(packet, callback);
-			}
-
-			// Sending data as a utf-8 string
-			var encoded = packets[packet.type];
-
-			// data fragment is optional
-			if (undefined !== packet.data) {
-				encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
-			}
-
-			return callback('' + encoded);
-
-		};
-
-		function encodeBase64Object(packet, callback) {
-			// packet data is an object { base64: true, data: dataAsBase64String }
-			var message = 'b' + exports.packets[packet.type] + packet.data.data;
-			return callback(message);
-		}
-
-		/**
-		 * Encode packet helpers for binary types
-		 */
-
-		function encodeArrayBuffer(packet, supportsBinary, callback) {
-			if (!supportsBinary) {
-				return exports.encodeBase64Packet(packet, callback);
-			}
-
-			var data = packet.data;
-			var contentArray = new Uint8Array(data);
-			var resultBuffer = new Uint8Array(1 + data.byteLength);
-
-			resultBuffer[0] = packets[packet.type];
-			for (var i = 0; i < contentArray.length; i++) {
-				resultBuffer[i+1] = contentArray[i];
-			}
-
-			return callback(resultBuffer.buffer);
-		}
-
-		function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
-			if (!supportsBinary) {
-				return exports.encodeBase64Packet(packet, callback);
-			}
-
-			var fr = new FileReader();
-			fr.onload = function() {
-				packet.data = fr.result;
-				exports.encodePacket(packet, supportsBinary, true, callback);
-			};
-			return fr.readAsArrayBuffer(packet.data);
-		}
-
-		function encodeBlob(packet, supportsBinary, callback) {
-			if (!supportsBinary) {
-				return exports.encodeBase64Packet(packet, callback);
-			}
-
-			if (dontSendBlobs) {
-				return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
-			}
-
-			var length = new Uint8Array(1);
-			length[0] = packets[packet.type];
-			var blob = new Blob([length.buffer, packet.data]);
-
-			return callback(blob);
-		}
-
-		/**
-		 * Encodes a packet with binary data in a base64 string
-		 *
-		 * @param {Object} packet, has `type` and `data`
-		 * @return {String} base64 encoded message
-		 */
-
-		exports.encodeBase64Packet = function(packet, callback) {
-			var message = 'b' + exports.packets[packet.type];
-			if (Blob && packet.data instanceof Blob) {
-				var fr = new FileReader();
-				fr.onload = function() {
-					var b64 = fr.result.split(',')[1];
-					callback(message + b64);
-				};
-				return fr.readAsDataURL(packet.data);
-			}
-
-			var b64data;
-			try {
-				b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
-			} catch (e) {
-				// iPhone Safari doesn't let you apply with typed arrays
-				var typed = new Uint8Array(packet.data);
-				var basic = new Array(typed.length);
-				for (var i = 0; i < typed.length; i++) {
-					basic[i] = typed[i];
-				}
-				b64data = String.fromCharCode.apply(null, basic);
-			}
-			message += global.btoa(b64data);
-			return callback(message);
-		};
-
-		/**
-		 * Decodes a packet. Changes format to Blob if requested.
-		 *
-		 * @return {Object} with `type` and `data` (if any)
-		 * @api private
-		 */
-
-		exports.decodePacket = function (data, binaryType, utf8decode) {
-			// String data
-			if (typeof data == 'string' || data === undefined) {
-				if (data.charAt(0) == 'b') {
-					return exports.decodeBase64Packet(data.substr(1), binaryType);
-				}
-
-				if (utf8decode) {
-					try {
-						data = utf8.decode(data);
-					} catch (e) {
-						return err;
-					}
-				}
-				var type = data.charAt(0);
-
-				if (Number(type) != type || !packetslist[type]) {
-					return err;
-				}
-
-				if (data.length > 1) {
-					return { type: packetslist[type], data: data.substring(1) };
-				} else {
-					return { type: packetslist[type] };
-				}
-			}
-
-			var asArray = new Uint8Array(data);
-			var type = asArray[0];
-			var rest = sliceBuffer(data, 1);
-			if (Blob && binaryType === 'blob') {
-				rest = new Blob([rest]);
-			}
-			return { type: packetslist[type], data: rest };
-		};
-
-		/**
-		 * Decodes a packet encoded in a base64 string
-		 *
-		 * @param {String} base64 encoded message
-		 * @return {Object} with `type` and `data` (if any)
-		 */
-
-		exports.decodeBase64Packet = function(msg, binaryType) {
-			var type = packetslist[msg.charAt(0)];
-			if (!global.ArrayBuffer) {
-				return { type: type, data: { base64: true, data: msg.substr(1) } };
-			}
-
-			var data = base64encoder.decode(msg.substr(1));
-
-			if (binaryType === 'blob' && Blob) {
-				data = new Blob([data]);
-			}
-
-			return { type: type, data: data };
-		};
-
-		/**
-		 * Encodes multiple messages (payload).
-		 *
-		 *     <length>:data
-		 *
-		 * Example:
-		 *
-		 *     11:hello world2:hi
-		 *
-		 * If any contents are binary, they will be encoded as base64 strings. Base64
-		 * encoded strings are marked with a b before the length specifier
-		 *
-		 * @param {Array} packets
-		 * @api private
-		 */
-
-		exports.encodePayload = function (packets, supportsBinary, callback) {
-			if (typeof supportsBinary == 'function') {
-				callback = supportsBinary;
-				supportsBinary = null;
-			}
-
-			var isBinary = hasBinary(packets);
-
-			if (supportsBinary && isBinary) {
-				if (Blob && !dontSendBlobs) {
-					return exports.encodePayloadAsBlob(packets, callback);
-				}
-
-				return exports.encodePayloadAsArrayBuffer(packets, callback);
-			}
-
-			if (!packets.length) {
-				return callback('0:');
-			}
-
-			function setLengthHeader(message) {
-				return message.length + ':' + message;
-			}
-
-			function encodeOne(packet, doneCallback) {
-				exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
-					doneCallback(null, setLengthHeader(message));
-				});
-			}
-
-			map(packets, encodeOne, function(err, results) {
-				return callback(results.join(''));
-			});
-		};
-
-		/**
-		 * Async array map using after
-		 */
-
-		function map(ary, each, done) {
-			var result = new Array(ary.length);
-			var next = after(ary.length, done);
-
-			var eachWithIndex = function(i, el, cb) {
-				each(el, function(error, msg) {
-					result[i] = msg;
-					cb(error, result);
-				});
-			};
-
-			for (var i = 0; i < ary.length; i++) {
-				eachWithIndex(i, ary[i], next);
-			}
-		}
-
-		/*
-		 * Decodes data when a payload is maybe expected. Possible binary contents are
-		 * decoded from their base64 representation
-		 *
-		 * @param {String} data, callback method
-		 * @api public
-		 */
-
-		exports.decodePayload = function (data, binaryType, callback) {
-			if (typeof data != 'string') {
-				return exports.decodePayloadAsBinary(data, binaryType, callback);
-			}
-
-			if (typeof binaryType === 'function') {
-				callback = binaryType;
-				binaryType = null;
-			}
-
-			var packet;
-			if (data == '') {
-				// parser error - ignoring payload
-				return callback(err, 0, 1);
-			}
-
-			var length = ''
-				, n, msg;
-
-			for (var i = 0, l = data.length; i < l; i++) {
-				var chr = data.charAt(i);
-
-				if (':' != chr) {
-					length += chr;
-				} else {
-					if ('' == length || (length != (n = Number(length)))) {
-						// parser error - ignoring payload
-						return callback(err, 0, 1);
-					}
-
-					msg = data.substr(i + 1, n);
-
-					if (length != msg.length) {
-						// parser error - ignoring payload
-						return callback(err, 0, 1);
-					}
-
-					if (msg.length) {
-						packet = exports.decodePacket(msg, binaryType, true);
-
-						if (err.type == packet.type && err.data == packet.data) {
-							// parser error in individual packet - ignoring payload
-							return callback(err, 0, 1);
-						}
-
-						var ret = callback(packet, i + n, l);
-						if (false === ret) return;
-					}
-
-					// advance cursor
-					i += n;
-					length = '';
-				}
-			}
-
-			if (length != '') {
-				// parser error - ignoring payload
-				return callback(err, 0, 1);
-			}
-
-		};
-
-		/**
-		 * Encodes multiple messages (payload) as binary.
-		 *
-		 * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
-		 * 255><data>
-		 *
-		 * Example:
-		 * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
-		 *
-		 * @param {Array} packets
-		 * @return {ArrayBuffer} encoded payload
-		 * @api private
-		 */
-
-		exports.encodePayloadAsArrayBuffer = function(packets, callback) {
-			if (!packets.length) {
-				return callback(new ArrayBuffer(0));
-			}
-
-			function encodeOne(packet, doneCallback) {
-				exports.encodePacket(packet, true, true, function(data) {
-					return doneCallback(null, data);
-				});
-			}
-
-			map(packets, encodeOne, function(err, encodedPackets) {
-				var totalLength = encodedPackets.reduce(function(acc, p) {
-					var len;
-					if (typeof p === 'string'){
-						len = p.length;
-					} else {
-						len = p.byteLength;
-					}
-					return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
-				}, 0);
-
-				var resultArray = new Uint8Array(totalLength);
-
-				var bufferIndex = 0;
-				encodedPackets.forEach(function(p) {
-					var isString = typeof p === 'string';
-					var ab = p;
-					if (isString) {
-						var view = new Uint8Array(p.length);
-						for (var i = 0; i < p.length; i++) {
-							view[i] = p.charCodeAt(i);
-						}
-						ab = view.buffer;
-					}
-
-					if (isString) { // not true binary
-						resultArray[bufferIndex++] = 0;
-					} else { // true binary
-						resultArray[bufferIndex++] = 1;
-					}
-
-					var lenStr = ab.byteLength.toString();
-					for (var i = 0; i < lenStr.length; i++) {
-						resultArray[bufferIndex++] = parseInt(lenStr[i]);
-					}
-					resultArray[bufferIndex++] = 255;
-
-					var view = new Uint8Array(ab);
-					for (var i = 0; i < view.length; i++) {
-						resultArray[bufferIndex++] = view[i];
-					}
-				});
-
-				return callback(resultArray.buffer);
-			});
-		};
-
-		/**
-		 * Encode as Blob
-		 */
-
-		exports.encodePayloadAsBlob = function(packets, callback) {
-			function encodeOne(packet, doneCallback) {
-				exports.encodePacket(packet, true, true, function(encoded) {
-					var binaryIdentifier = new Uint8Array(1);
-					binaryIdentifier[0] = 1;
-					if (typeof encoded === 'string') {
-						var view = new Uint8Array(encoded.length);
-						for (var i = 0; i < encoded.length; i++) {
-							view[i] = encoded.charCodeAt(i);
-						}
-						encoded = view.buffer;
-						binaryIdentifier[0] = 0;
-					}
-
-					var len = (encoded instanceof ArrayBuffer)
-						? encoded.byteLength
-						: encoded.size;
-
-					var lenStr = len.toString();
-					var lengthAry = new Uint8Array(lenStr.length + 1);
-					for (var i = 0; i < lenStr.length; i++) {
-						lengthAry[i] = parseInt(lenStr[i]);
-					}
-					lengthAry[lenStr.length] = 255;
-
-					if (Blob) {
-						var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
-						doneCallback(null, blob);
-					}
-				});
-			}
-
-			map(packets, encodeOne, function(err, results) {
-				return callback(new Blob(results));
-			});
-		};
-
-		/*
-		 * Decodes data when a payload is maybe expected. Strings are decoded by
-		 * interpreting each byte as a key code for entries marked to start with 0. See
-		 * description of encodePayloadAsBinary
-		 *
-		 * @param {ArrayBuffer} data, callback method
-		 * @api public
-		 */
-
-		exports.decodePayloadAsBinary = function (data, binaryType, callback) {
-			if (typeof binaryType === 'function') {
-				callback = binaryType;
-				binaryType = null;
-			}
-
-			var bufferTail = data;
-			var buffers = [];
-
-			var numberTooLong = false;
-			while (bufferTail.byteLength > 0) {
-				var tailArray = new Uint8Array(bufferTail);
-				var isString = tailArray[0] === 0;
-				var msgLength = '';
-
-				for (var i = 1; ; i++) {
-					if (tailArray[i] == 255) break;
-
-					if (msgLength.length > 310) {
-						numberTooLong = true;
-						break;
-					}
-
-					msgLength += tailArray[i];
-				}
-
-				if(numberTooLong) return callback(err, 0, 1);
-
-				bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
-				msgLength = parseInt(msgLength);
-
-				var msg = sliceBuffer(bufferTail, 0, msgLength);
-				if (isString) {
-					try {
-						msg = String.fromCharCode.apply(null, new Uint8Array(msg));
-					} catch (e) {
-						// iPhone Safari doesn't let you apply to typed arrays
-						var typed = new Uint8Array(msg);
-						msg = '';
-						for (var i = 0; i < typed.length; i++) {
-							msg += String.fromCharCode(typed[i]);
-						}
-					}
-				}
-
-				buffers.push(msg);
-				bufferTail = sliceBuffer(bufferTail, msgLength);
-			}
-
-			var total = buffers.length;
-			buffers.forEach(function(buffer, i) {
-				callback(exports.decodePacket(buffer, binaryType, true), i, total);
-			});
-		};
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./keys":25,"after":1,"arraybuffer.slice":2,"base64-arraybuffer":5,"blob":6,"has-binary":41,"utf8":86}],25:[function(require,module,exports){
-
-	/**
-	 * Gets the keys for an object.
-	 *
-	 * @return {Array} keys
-	 * @api private
-	 */
-
-	module.exports = Object.keys || function keys (obj){
-			var arr = [];
-			var has = Object.prototype.hasOwnProperty;
-
-			for (var i in obj) {
-				if (has.call(obj, i)) {
-					arr.push(i);
-				}
-			}
-			return arr;
-		};
-
-},{}],26:[function(require,module,exports){
-	var WildEmitter = require('wildemitter');
-	var util = require('util');
-
-	function Sender(opts) {
-		WildEmitter.call(this);
-		var options = opts || {};
-		this.config = {
-			chunksize: 16384,
-			pacing: 0
-		};
-		// set our config from options
-		var item;
-		for (item in options) {
-			this.config[item] = options[item];
-		}
-
-		this.file = null;
-		this.channel = null;
-	}
-	util.inherits(Sender, WildEmitter);
-
-	Sender.prototype.send = function (file, channel) {
-		var self = this;
-		this.file = file;
-		this.channel = channel;
-		var usePoll = typeof channel.bufferedAmountLowThreshold !== 'number';
-		var offset = 0;
-		var sliceFile = function() {
-			var reader = new window.FileReader();
-			reader.onload = (function() {
-				return function(e) {
-					self.channel.send(e.target.result);
-					self.emit('progress', offset, file.size, e.target.result);
-
-					if (file.size > offset + e.target.result.byteLength) {
-						if (usePoll) {
-							window.setTimeout(sliceFile, self.config.pacing);
-						} else if (channel.bufferedAmount <= channel.bufferedAmountLowThreshold) {
-							window.setTimeout(sliceFile, 0);
-						} else {
-							// wait for bufferedAmountLow to fire
-						}
-					} else {
-						self.emit('progress', file.size, file.size, null);
-						self.emit('sentFile');
-					}
-					offset = offset + self.config.chunksize;
-				};
-			})(file);
-			var slice = file.slice(offset, offset + self.config.chunksize);
-			reader.readAsArrayBuffer(slice);
-		};
-		if (!usePoll) {
-			channel.bufferedAmountLowThreshold = 8 * this.config.chunksize;
-			channel.addEventListener('bufferedamountlow', sliceFile);
-		}
-		window.setTimeout(sliceFile, 0);
-	};
-
-	function Receiver() {
-		WildEmitter.call(this);
-
-		this.receiveBuffer = [];
-		this.received = 0;
-		this.metadata = {};
-		this.channel = null;
-	}
-	util.inherits(Receiver, WildEmitter);
-
-	Receiver.prototype.receive = function (metadata, channel) {
-		var self = this;
-
-		if (metadata) {
-			this.metadata = metadata;
-		}
-		this.channel = channel;
-		// chrome only supports arraybuffers and those make it easier to calc the hash
-		channel.binaryType = 'arraybuffer';
-		this.channel.onmessage = function (event) {
-			var len = event.data.byteLength;
-			self.received += len;
-			self.receiveBuffer.push(event.data);
-
-			self.emit('progress', self.received, self.metadata.size, event.data);
-			if (self.received === self.metadata.size) {
-				self.emit('receivedFile', new window.Blob(self.receiveBuffer), self.metadata);
-				self.receiveBuffer = []; // discard receivebuffer
-			} else if (self.received > self.metadata.size) {
-				// FIXME
-				console.error('received more than expected, discarding...');
-				self.receiveBuffer = []; // just discard...
-
-			}
-		};
-	};
-
-	module.exports = {};
-	module.exports.support = typeof window !== 'undefined' && window && window.File && window.FileReader && window.Blob;
-	module.exports.Sender = Sender;
-	module.exports.Receiver = Receiver;
-
-},{"util":89,"wildemitter":100}],27:[function(require,module,exports){
-// getScreenMedia helper by @HenrikJoreteg
-	var getUserMedia = require('getusermedia');
-
-// cache for constraints and callback
-	var cache = {};
-
-	module.exports = function (mode, constraints, cb) {
-		var hasConstraints = arguments.length === 3;
-		var callback = hasConstraints ? cb : constraints;
-		var error;
-
-		if (typeof window === 'undefined' || window.location.protocol === 'http:') {
-			error = new Error('NavigatorUserMediaError');
-			error.name = 'HTTPS_REQUIRED';
-			return callback(error);
-		}
-
-		if (window.navigator.userAgent.match('Chrome')) {
-			var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(\d+)\./)[1], 10);
-			var maxver = 33;
-			// Chrome 71 dropped support for "window.chrome.webstore;".
-			var isCef = (chromever < 71) && !window.chrome.webstore;
-			// "known" crash in chrome 34 and 35 on linux
-			if (window.navigator.userAgent.match('Linux')) maxver = 35;
-
-			// check that the extension is installed by looking for a
-			// sessionStorage variable that contains the extension id
-			// this has to be set after installation unless the contest
-			// script does that
-			if (sessionStorage.getScreenMediaJSExtensionId) {
-				chrome.runtime.sendMessage(sessionStorage.getScreenMediaJSExtensionId,
-					{type:'getScreen', id: 1}, null,
-					function (data) {
-						if (!data || data.sourceId === '') { // user canceled
-							var error = new Error('NavigatorUserMediaError');
-							error.name = 'PERMISSION_DENIED';
-							callback(error);
-						} else {
-							constraints = (hasConstraints && constraints) || {audio: false, video: {
-									mandatory: {
-										chromeMediaSource: 'desktop',
-										maxWidth: window.screen.width,
-										maxHeight: window.screen.height,
-										maxFrameRate: 3
-									}
-								}};
-							constraints.video.mandatory.chromeMediaSourceId = data.sourceId;
-							getUserMedia(constraints, callback);
-						}
-					}
-				);
-			} else if (window.cefGetScreenMedia) {
-				//window.cefGetScreenMedia is experimental - may be removed without notice
-				window.cefGetScreenMedia(function(sourceId) {
-					if (!sourceId) {
-						var error = new Error('cefGetScreenMediaError');
-						error.name = 'CEF_GETSCREENMEDIA_CANCELED';
-						callback(error);
-					} else {
-						constraints = (hasConstraints && constraints) || {audio: false, video: {
-								mandatory: {
-									chromeMediaSource: 'desktop',
-									maxWidth: window.screen.width,
-									maxHeight: window.screen.height,
-									maxFrameRate: 3
-								},
-								optional: [
-									{googLeakyBucket: true},
-									{googTemporalLayeredScreencast: true}
-								]
-							}};
-						constraints.video.mandatory.chromeMediaSourceId = sourceId;
-						getUserMedia(constraints, callback);
-					}
-				});
-			} else if (isCef || (chromever >= 26 && chromever <= maxver)) {
-				// chrome 26 - chrome 33 way to do it -- requires bad chrome://flags
-				// note: this is basically in maintenance mode and will go away soon
-				constraints = (hasConstraints && constraints) || {
-						video: {
-							mandatory: {
-								googLeakyBucket: true,
-								maxWidth: window.screen.width,
-								maxHeight: window.screen.height,
-								maxFrameRate: 3,
-								chromeMediaSource: 'screen'
-							}
-						}
-					};
-				getUserMedia(constraints, callback);
-			} else {
-				// chrome 34+ way requiring an extension
-				var pending = window.setTimeout(function () {
-					error = new Error('NavigatorUserMediaError');
-					error.name = 'EXTENSION_UNAVAILABLE';
-					return callback(error);
-				}, 1000);
-				cache[pending] = [callback, hasConstraints ? constraints : null];
-				window.postMessage({ type: 'getScreen', id: pending }, '*');
-			}
-		} else if (window.navigator.userAgent.match('Firefox')) {
-			var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
-			if (ffver >= 52) {
-				mode = mode || 'window';
-				constraints = (hasConstraints && constraints) || {
-					video: {
-						mozMediaSource: mode,
-						mediaSource: mode
-					}
-				};
-				getUserMedia(constraints, function (err, stream) {
-					callback(err, stream);
-					if (err) {
-						return;
-					}
-					// workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
-					var lastTime = stream.currentTime;
-					var polly = window.setInterval(function () {
-						if (!stream) window.clearInterval(polly);
-						if (stream.currentTime == lastTime) {
-							window.clearInterval(polly);
-							if (stream.onended) {
-								stream.onended();
-							}
-						}
-						lastTime = stream.currentTime;
-					}, 500);
-				});
-			} else {
-				error = new Error('NavigatorUserMediaError');
-				error.name = 'FF52_REQUIRED';
-				return callback(error);
-			}
-		}
-	};
-
-	typeof window !== 'undefined' && window.addEventListener('message', function (event) {
-		if (event.origin != window.location.origin && !event.isTrusted) {
-			return;
-		}
-		if (event.data.type == 'gotScreen' && cache[event.data.id]) {
-			var data = cache[event.data.id];
-			var constraints = data[1];
-			var callback = data[0];
-			delete cache[event.data.id];
-
-			if (event.data.sourceId === '') { // user canceled
-				var error = new Error('NavigatorUserMediaError');
-				error.name = 'PERMISSION_DENIED';
-				callback(error);
-			} else {
-				constraints = constraints || {audio: false, video: {
-						mandatory: {
-							chromeMediaSource: 'desktop',
-							maxWidth: window.screen.width,
-							maxHeight: window.screen.height,
-							maxFrameRate: 3
-						},
-						optional: [
-							{googLeakyBucket: true},
-							{googTemporalLayeredScreencast: true}
-						]
-					}};
-				constraints.video.mandatory.chromeMediaSourceId = event.data.sourceId;
-				getUserMedia(constraints, callback);
-			}
-		} else if (event.data.type == 'getScreenPending') {
-			window.clearTimeout(event.data.id);
-		}
-	});
-
-},{"getusermedia":28}],28:[function(require,module,exports){
-// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
-	var adapter = require('webrtc-adapter');
-
-	module.exports = function (constraints, cb) {
-		var error;
-		var haveOpts = arguments.length === 2;
-		var defaultOpts = {video: true, audio: true};
-
-		var denied = 'PermissionDeniedError';
-		var altDenied = 'PERMISSION_DENIED';
-		var notSatisfied = 'ConstraintNotSatisfiedError';
-
-		// make constraints optional
-		if (!haveOpts) {
-			cb = constraints;
-			constraints = defaultOpts;
-		}
-
-		// treat lack of browser support like an error
-		if (typeof navigator === 'undefined' || !navigator.getUserMedia) {
-			// throw proper error per spec
-			error = new Error('MediaStreamError');
-			error.name = 'NotSupportedError';
-
-			// keep all callbacks async
-			return setTimeout(function () {
-				cb(error);
-			}, 0);
-		}
-
-		// normalize error handling when no media types are requested
-		if (!constraints.audio && !constraints.video) {
-			error = new Error('MediaStreamError');
-			error.name = 'NoMediaRequestedError';
-
-			// keep all callbacks async
-			return setTimeout(function () {
-				cb(error);
-			}, 0);
-		}
-
-		navigator.mediaDevices.getUserMedia(constraints)
-			.then(function (stream) {
-				cb(null, stream);
-			}).catch(function (err) {
-			var error;
-			// coerce into an error object since FF gives us a string
-			// there are only two valid names according to the spec
-			// we coerce all non-denied to "constraint not satisfied".
-			if (typeof err === 'string') {
-				error = new Error('MediaStreamError');
-				if (err === denied || err === altDenied) {
-					error.name = denied;
-				} else {
-					error.name = notSatisfied;
-				}
-			} else {
-				// if we get an error object make sure '.name' property is set
-				// according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
-				error = err;
-				if (!error.name) {
-					// this is likely chrome which
-					// sets a property called "ERROR_DENIED" on the error object
-					// if so we make sure to set a name
-					if (error[denied]) {
-						err.name = denied;
-					} else {
-						err.name = notSatisfied;
-					}
-				}
-			}
-
-			cb(error);
-		});
-	};
-
-},{"webrtc-adapter":90}],29:[function(require,module,exports){
-// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
-	var adapter = require('webrtc-adapter');
-
-	module.exports = function (constraints, cb) {
-		var error;
-		var haveOpts = arguments.length === 2;
-		var defaultOpts = {video: true, audio: true};
-
-		var denied = 'PermissionDeniedError';
-		var altDenied = 'PERMISSION_DENIED';
-		var notSatisfied = 'ConstraintNotSatisfiedError';
-
-		// make constraints optional
-		if (!haveOpts) {
-			cb = constraints;
-			constraints = defaultOpts;
-		}
-
-		// treat lack of browser support like an error
-		if (typeof navigator === 'undefined' || !navigator.getUserMedia) {
-			// throw proper error per spec
-			error = new Error('MediaStreamError');
-			error.name = 'NotSupportedError';
-
-			// keep all callbacks async
-			return setTimeout(function () {
-				cb(error);
-			}, 0);
-		}
-
-		// normalize error handling when no media types are requested
-		if (!constraints.audio && !constraints.video) {
-			error = new Error('MediaStreamError');
-			error.name = 'NoMediaRequestedError';
-
-			// keep all callbacks async
-			return setTimeout(function () {
-				cb(error);
-			}, 0);
-		}
-
-		// testing support -- note: using the about:config pref is better
-		// for Firefox 39+, this might get removed in the future
-		if (localStorage && localStorage.useFirefoxFakeDevice === 'true') {
-			constraints.fake = true;
-		}
-
-		navigator.mediaDevices.getUserMedia(constraints)
-			.then(function (stream) {
-				cb(null, stream);
-			}).catch(function (err) {
-			var error;
-			// coerce into an error object since FF gives us a string
-			// there are only two valid names according to the spec
-			// we coerce all non-denied to "constraint not satisfied".
-			if (typeof err === 'string') {
-				error = new Error('MediaStreamError');
-				if (err === denied || err === altDenied) {
-					error.name = denied;
-				} else {
-					error.name = notSatisfied;
-				}
-			} else {
-				// if we get an error object make sure '.name' property is set
-				// according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
-				error = err;
-				if (!error.name) {
-					// this is likely chrome which
-					// sets a property called "ERROR_DENIED" on the error object
-					// if so we make sure to set a name
-					if (error[denied]) {
-						err.name = denied;
-					} else {
-						err.name = notSatisfied;
-					}
-				}
-			}
-
-			cb(error);
-		});
-	};
-
-},{"webrtc-adapter":30}],30:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-
-	'use strict';
-
-// Shimming starts here.
-	(function() {
-		// Utils.
-		var logging = require('./utils').log;
-		var browserDetails = require('./utils').browserDetails;
-		// Export to the adapter global object visible in the browser.
-		module.exports.browserDetails = browserDetails;
-		module.exports.extractVersion = require('./utils').extractVersion;
-		module.exports.disableLog = require('./utils').disableLog;
-
-		// Uncomment the line below if you want logging to occur, including logging
-		// for the switch statement below. Can also be turned on in the browser via
-		// adapter.disableLog(false), but then logging from the switch statement below
-		// will not appear.
-		// require('./utils').disableLog(false);
-
-		// Browser shims.
-		var chromeShim = require('./chrome/chrome_shim') || null;
-		var edgeShim = require('./edge/edge_shim') || null;
-		var firefoxShim = require('./firefox/firefox_shim') || null;
-		var safariShim = require('./safari/safari_shim') || null;
-
-		// Shim browser if found.
-		switch (browserDetails.browser) {
-			case 'opera': // fallthrough as it uses chrome shims
-			case 'chrome':
-				if (!chromeShim || !chromeShim.shimPeerConnection) {
-					logging('Chrome shim is not included in this adapter release.');
-					return;
-				}
-				logging('adapter.js shimming chrome.');
-				// Export to the adapter global object visible in the browser.
-				module.exports.browserShim = chromeShim;
-
-				chromeShim.shimGetUserMedia();
-				chromeShim.shimMediaStream();
-				chromeShim.shimSourceObject();
-				chromeShim.shimPeerConnection();
-				chromeShim.shimOnTrack();
-				break;
-			case 'firefox':
-				if (!firefoxShim || !firefoxShim.shimPeerConnection) {
-					logging('Firefox shim is not included in this adapter release.');
-					return;
-				}
-				logging('adapter.js shimming firefox.');
-				// Export to the adapter global object visible in the browser.
-				module.exports.browserShim = firefoxShim;
-
-				firefoxShim.shimGetUserMedia();
-				firefoxShim.shimSourceObject();
-				firefoxShim.shimPeerConnection();
-				firefoxShim.shimOnTrack();
-				break;
-			case 'edge':
-				if (!edgeShim || !edgeShim.shimPeerConnection) {
-					logging('MS edge shim is not included in this adapter release.');
-					return;
-				}
-				logging('adapter.js shimming edge.');
-				// Export to the adapter global object visible in the browser.
-				module.exports.browserShim = edgeShim;
-
-				edgeShim.shimGetUserMedia();
-				edgeShim.shimPeerConnection();
-				break;
-			case 'safari':
-				if (!safariShim) {
-					logging('Safari shim is not included in this adapter release.');
-					return;
-				}
-				logging('adapter.js shimming safari.');
-				// Export to the adapter global object visible in the browser.
-				module.exports.browserShim = safariShim;
-
-				safariShim.shimGetUserMedia();
-				break;
-			default:
-				logging('Unsupported browser!');
-		}
-	})();
-
-},{"./chrome/chrome_shim":31,"./edge/edge_shim":33,"./firefox/firefox_shim":35,"./safari/safari_shim":37,"./utils":38}],31:[function(require,module,exports){
-
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-	var logging = require('../utils.js').log;
-	var browserDetails = require('../utils.js').browserDetails;
-
-	var chromeShim = {
-		shimMediaStream: function() {
-			window.MediaStream = window.MediaStream || window.webkitMediaStream;
-		},
-
-		shimOnTrack: function() {
-			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
-				window.RTCPeerConnection.prototype)) {
-				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
-					get: function() {
-						return this._ontrack;
-					},
-					set: function(f) {
-						var self = this;
-						if (this._ontrack) {
-							this.removeEventListener('track', this._ontrack);
-							this.removeEventListener('addstream', this._ontrackpoly);
-						}
-						this.addEventListener('track', this._ontrack = f);
-						this.addEventListener('addstream', this._ontrackpoly = function(e) {
-							// onaddstream does not fire when a track is added to an existing
-							// stream. But stream.onaddtrack is implemented so we use that.
-							e.stream.addEventListener('addtrack', function(te) {
-								var event = new Event('track');
-								event.track = te.track;
-								event.receiver = {track: te.track};
-								event.streams = [e.stream];
-								self.dispatchEvent(event);
-							});
-							e.stream.getTracks().forEach(function(track) {
-								var event = new Event('track');
-								event.track = track;
-								event.receiver = {track: track};
-								event.streams = [e.stream];
-								this.dispatchEvent(event);
-							}.bind(this));
-						}.bind(this));
-					}
-				});
-			}
-		},
-
-		shimSourceObject: function() {
-			if (typeof window === 'object') {
-				if (window.HTMLMediaElement &&
-					!('srcObject' in window.HTMLMediaElement.prototype)) {
-					// Shim the srcObject property, once, when HTMLMediaElement is found.
-					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
-						get: function() {
-							return this._srcObject;
-						},
-						set: function(stream) {
-							var self = this;
-							// Use _srcObject as a private property for this shim
-							this._srcObject = stream;
-							if (this.src) {
-								URL.revokeObjectURL(this.src);
-							}
-
-							if (!stream) {
-								this.src = '';
-								return;
-							}
-							this.src = URL.createObjectURL(stream);
-							// We need to recreate the blob url when a track is added or
-							// removed. Doing it manually since we want to avoid a recursion.
-							stream.addEventListener('addtrack', function() {
-								if (self.src) {
-									URL.revokeObjectURL(self.src);
-								}
-								self.src = URL.createObjectURL(stream);
-							});
-							stream.addEventListener('removetrack', function() {
-								if (self.src) {
-									URL.revokeObjectURL(self.src);
-								}
-								self.src = URL.createObjectURL(stream);
-							});
-						}
-					});
-				}
-			}
-		},
-
-		shimPeerConnection: function() {
-			// The RTCPeerConnection object.
-			window.RTCPeerConnection = function(pcConfig, pcConstraints) {
-				// Translate iceTransportPolicy to iceTransports,
-				// see https://code.google.com/p/webrtc/issues/detail?id=4869
-				logging('PeerConnection');
-				if (pcConfig && pcConfig.iceTransportPolicy) {
-					pcConfig.iceTransports = pcConfig.iceTransportPolicy;
-				}
-
-				var pc = new webkitRTCPeerConnection(pcConfig, pcConstraints);
-				var origGetStats = pc.getStats.bind(pc);
-				pc.getStats = function(selector, successCallback, errorCallback) {
-					var self = this;
-					var args = arguments;
-
-					// If selector is a function then we are in the old style stats so just
-					// pass back the original getStats format to avoid breaking old users.
-					if (arguments.length > 0 && typeof selector === 'function') {
-						return origGetStats(selector, successCallback);
-					}
-
-					var fixChromeStats_ = function(response) {
-						var standardReport = {};
-						var reports = response.result();
-						reports.forEach(function(report) {
-							var standardStats = {
-								id: report.id,
-								timestamp: report.timestamp,
-								type: report.type
-							};
-							report.names().forEach(function(name) {
-								standardStats[name] = report.stat(name);
-							});
-							standardReport[standardStats.id] = standardStats;
-						});
-
-						return standardReport;
-					};
-
-					// shim getStats with maplike support
-					var makeMapStats = function(stats, legacyStats) {
-						var map = new Map(Object.keys(stats).map(function(key) {
-							return[key, stats[key]];
-						}));
-						legacyStats = legacyStats || stats;
-						Object.keys(legacyStats).forEach(function(key) {
-							map[key] = legacyStats[key];
-						});
-						return map;
-					};
-
-					if (arguments.length >= 2) {
-						var successCallbackWrapper_ = function(response) {
-							args[1](makeMapStats(fixChromeStats_(response)));
-						};
-
-						return origGetStats.apply(this, [successCallbackWrapper_,
-							arguments[0]]);
-					}
-
-					// promise-support
-					return new Promise(function(resolve, reject) {
-						if (args.length === 1 && typeof selector === 'object') {
-							origGetStats.apply(self, [
-								function(response) {
-									resolve(makeMapStats(fixChromeStats_(response)));
-								}, reject]);
-						} else {
-							// Preserve legacy chrome stats only on legacy access of stats obj
-							origGetStats.apply(self, [
-								function(response) {
-									resolve(makeMapStats(fixChromeStats_(response),
-										response.result()));
-								}, reject]);
-						}
-					}).then(successCallback, errorCallback);
-				};
-
-				return pc;
-			};
-			window.RTCPeerConnection.prototype = webkitRTCPeerConnection.prototype;
-
-			// wrap static methods. Currently just generateCertificate.
-			if (webkitRTCPeerConnection.generateCertificate) {
-				Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
-					get: function() {
-						return webkitRTCPeerConnection.generateCertificate;
-					}
-				});
-			}
-
-			['createOffer', 'createAnswer'].forEach(function(method) {
-				var nativeMethod = webkitRTCPeerConnection.prototype[method];
-				webkitRTCPeerConnection.prototype[method] = function() {
-					var self = this;
-					if (arguments.length < 1 || (arguments.length === 1 &&
-						typeof arguments[0] === 'object')) {
-						var opts = arguments.length === 1 ? arguments[0] : undefined;
-						return new Promise(function(resolve, reject) {
-							nativeMethod.apply(self, [resolve, reject, opts]);
-						});
-					}
-					return nativeMethod.apply(this, arguments);
-				};
-			});
-
-			// add promise support -- natively available in Chrome 51
-			if (browserDetails.version < 51) {
-				['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-					.forEach(function(method) {
-						var nativeMethod = webkitRTCPeerConnection.prototype[method];
-						webkitRTCPeerConnection.prototype[method] = function() {
-							var args = arguments;
-							var self = this;
-							var promise = new Promise(function(resolve, reject) {
-								nativeMethod.apply(self, [args[0], resolve, reject]);
-							});
-							if (args.length < 2) {
-								return promise;
-							}
-							return promise.then(function() {
-									args[1].apply(null, []);
-								},
-								function(err) {
-									if (args.length >= 3) {
-										args[2].apply(null, [err]);
-									}
-								});
-						};
-					});
-			}
-
-			// support for addIceCandidate(null)
-			var nativeAddIceCandidate =
-				RTCPeerConnection.prototype.addIceCandidate;
-			RTCPeerConnection.prototype.addIceCandidate = function() {
-				return arguments[0] === null ? Promise.resolve()
-					: nativeAddIceCandidate.apply(this, arguments);
-			};
-
-			// shim implicit creation of RTCSessionDescription/RTCIceCandidate
-			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-				.forEach(function(method) {
-					var nativeMethod = webkitRTCPeerConnection.prototype[method];
-					webkitRTCPeerConnection.prototype[method] = function() {
-						arguments[0] = new ((method === 'addIceCandidate') ?
-							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
-						return nativeMethod.apply(this, arguments);
-					};
-				});
-		},
-
-		// Attach a media stream to an element.
-		attachMediaStream: function(element, stream) {
-			logging('DEPRECATED, attachMediaStream will soon be removed.');
-			if (browserDetails.version >= 43) {
-				element.srcObject = stream;
-			} else if (typeof element.src !== 'undefined') {
-				element.src = URL.createObjectURL(stream);
-			} else {
-				logging('Error attaching stream to element.');
-			}
-		},
-
-		reattachMediaStream: function(to, from) {
-			logging('DEPRECATED, reattachMediaStream will soon be removed.');
-			if (browserDetails.version >= 43) {
-				to.srcObject = from.srcObject;
-			} else {
-				to.src = from.src;
-			}
-		}
-	};
-
-
-// Expose public methods.
-	module.exports = {
-		shimMediaStream: chromeShim.shimMediaStream,
-		shimOnTrack: chromeShim.shimOnTrack,
-		shimSourceObject: chromeShim.shimSourceObject,
-		shimPeerConnection: chromeShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia'),
-		attachMediaStream: chromeShim.attachMediaStream,
-		reattachMediaStream: chromeShim.reattachMediaStream
-	};
-
-},{"../utils.js":38,"./getusermedia":32}],32:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-	var logging = require('../utils.js').log;
-
-// Expose public methods.
-	module.exports = function() {
-		var constraintsToChrome_ = function(c) {
-			if (typeof c !== 'object' || c.mandatory || c.optional) {
-				return c;
-			}
-			var cc = {};
-			Object.keys(c).forEach(function(key) {
-				if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
-					return;
-				}
-				var r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};
-				if (r.exact !== undefined && typeof r.exact === 'number') {
-					r.min = r.max = r.exact;
-				}
-				var oldname_ = function(prefix, name) {
-					if (prefix) {
-						return prefix + name.charAt(0).toUpperCase() + name.slice(1);
-					}
-					return (name === 'deviceId') ? 'sourceId' : name;
-				};
-				if (r.ideal !== undefined) {
-					cc.optional = cc.optional || [];
-					var oc = {};
-					if (typeof r.ideal === 'number') {
-						oc[oldname_('min', key)] = r.ideal;
-						cc.optional.push(oc);
-						oc = {};
-						oc[oldname_('max', key)] = r.ideal;
-						cc.optional.push(oc);
-					} else {
-						oc[oldname_('', key)] = r.ideal;
-						cc.optional.push(oc);
-					}
-				}
-				if (r.exact !== undefined && typeof r.exact !== 'number') {
-					cc.mandatory = cc.mandatory || {};
-					cc.mandatory[oldname_('', key)] = r.exact;
-				} else {
-					['min', 'max'].forEach(function(mix) {
-						if (r[mix] !== undefined) {
-							cc.mandatory = cc.mandatory || {};
-							cc.mandatory[oldname_(mix, key)] = r[mix];
-						}
-					});
-				}
-			});
-			if (c.advanced) {
-				cc.optional = (cc.optional || []).concat(c.advanced);
-			}
-			return cc;
-		};
-
-		var shimConstraints_ = function(constraints, func) {
-			constraints = JSON.parse(JSON.stringify(constraints));
-			if (constraints && constraints.audio) {
-				constraints.audio = constraintsToChrome_(constraints.audio);
-			}
-			if (constraints && typeof constraints.video === 'object') {
-				// Shim facingMode for mobile, where it defaults to "user".
-				var face = constraints.video.facingMode;
-				face = face && ((typeof face === 'object') ? face : {ideal: face});
-
-				if ((face && (face.exact === 'user' || face.exact === 'environment' ||
-					face.ideal === 'user' || face.ideal === 'environment')) &&
-					!(navigator.mediaDevices.getSupportedConstraints &&
-					navigator.mediaDevices.getSupportedConstraints().facingMode)) {
-					delete constraints.video.facingMode;
-					if (face.exact === 'environment' || face.ideal === 'environment') {
-						// Look for "back" in label, or use last cam (typically back cam).
-						return navigator.mediaDevices.enumerateDevices()
-							.then(function(devices) {
-								devices = devices.filter(function(d) {
-									return d.kind === 'videoinput';
-								});
-								var back = devices.find(function(d) {
-										return d.label.toLowerCase().indexOf('back') !== -1;
-									}) || (devices.length && devices[devices.length - 1]);
-								if (back) {
-									constraints.video.deviceId = face.exact ? {exact: back.deviceId} :
-										{ideal: back.deviceId};
-								}
-								constraints.video = constraintsToChrome_(constraints.video);
-								logging('chrome: ' + JSON.stringify(constraints));
-								return func(constraints);
-							});
-					}
-				}
-				constraints.video = constraintsToChrome_(constraints.video);
-			}
-			logging('chrome: ' + JSON.stringify(constraints));
-			return func(constraints);
-		};
-
-		var shimError_ = function(e) {
-			return {
-				name: {
-					PermissionDeniedError: 'NotAllowedError',
-					ConstraintNotSatisfiedError: 'OverconstrainedError'
-				}[e.name] || e.name,
-				message: e.message,
-				constraint: e.constraintName,
-				toString: function() {
-					return this.name + (this.message && ': ') + this.message;
-				}
-			};
-		};
-
-		var getUserMedia_ = function(constraints, onSuccess, onError) {
-			shimConstraints_(constraints, function(c) {
-				navigator.webkitGetUserMedia(c, onSuccess, function(e) {
-					onError(shimError_(e));
-				});
-			});
-		};
-
-		navigator.getUserMedia = getUserMedia_;
-
-		// Returns the result of getUserMedia as a Promise.
-		var getUserMediaPromise_ = function(constraints) {
-			return new Promise(function(resolve, reject) {
-				navigator.getUserMedia(constraints, resolve, reject);
-			});
-		};
-
-		if (!navigator.mediaDevices) {
-			navigator.mediaDevices = {
-				getUserMedia: getUserMediaPromise_,
-				enumerateDevices: function() {
-					return new Promise(function(resolve) {
-						var kinds = {audio: 'audioinput', video: 'videoinput'};
-						return MediaStreamTrack.getSources(function(devices) {
-							resolve(devices.map(function(device) {
-								return {label: device.label,
-									kind: kinds[device.kind],
-									deviceId: device.id,
-									groupId: ''};
-							}));
-						});
-					});
-				}
-			};
-		}
-
-		// A shim for getUserMedia method on the mediaDevices object.
-		// TODO(KaptenJansson) remove once implemented in Chrome stable.
-		if (!navigator.mediaDevices.getUserMedia) {
-			navigator.mediaDevices.getUserMedia = function(constraints) {
-				return getUserMediaPromise_(constraints);
-			};
-		} else {
-			// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
-			// function which returns a Promise, it does not accept spec-style
-			// constraints.
-			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
-			bind(navigator.mediaDevices);
-			navigator.mediaDevices.getUserMedia = function(cs) {
-				return shimConstraints_(cs, function(c) {
-					return origGetUserMedia(c).catch(function(e) {
-						return Promise.reject(shimError_(e));
-					});
-				});
-			};
-		}
-
-		// Dummy devicechange event methods.
-		// TODO(KaptenJansson) remove once implemented in Chrome stable.
-		if (typeof navigator.mediaDevices.addEventListener === 'undefined') {
-			navigator.mediaDevices.addEventListener = function() {
-				logging('Dummy mediaDevices.addEventListener called.');
-			};
-		}
-		if (typeof navigator.mediaDevices.removeEventListener === 'undefined') {
-			navigator.mediaDevices.removeEventListener = function() {
-				logging('Dummy mediaDevices.removeEventListener called.');
-			};
-		}
-	};
-
-},{"../utils.js":38}],33:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var SDPUtils = require('sdp');
-	var logging = require('../utils').log;
-
-	var edgeShim = {
-		shimPeerConnection: function() {
-			if (window.RTCIceGatherer) {
-				// ORTC defines an RTCIceCandidate object but no constructor.
-				// Not implemented in Edge.
-				if (!window.RTCIceCandidate) {
-					window.RTCIceCandidate = function(args) {
-						return args;
-					};
-				}
-				// ORTC does not have a session description object but
-				// other browsers (i.e. Chrome) that will support both PC and ORTC
-				// in the future might have this defined already.
-				if (!window.RTCSessionDescription) {
-					window.RTCSessionDescription = function(args) {
-						return args;
-					};
-				}
-			}
-
-			window.RTCPeerConnection = function(config) {
-				var self = this;
-
-				var _eventTarget = document.createDocumentFragment();
-				['addEventListener', 'removeEventListener', 'dispatchEvent']
-					.forEach(function(method) {
-						self[method] = _eventTarget[method].bind(_eventTarget);
-					});
-
-				this.onicecandidate = null;
-				this.onaddstream = null;
-				this.ontrack = null;
-				this.onremovestream = null;
-				this.onsignalingstatechange = null;
-				this.oniceconnectionstatechange = null;
-				this.onnegotiationneeded = null;
-				this.ondatachannel = null;
-
-				this.localStreams = [];
-				this.remoteStreams = [];
-				this.getLocalStreams = function() {
-					return self.localStreams;
-				};
-				this.getRemoteStreams = function() {
-					return self.remoteStreams;
-				};
-
-				this.localDescription = new RTCSessionDescription({
-					type: '',
-					sdp: ''
-				});
-				this.remoteDescription = new RTCSessionDescription({
-					type: '',
-					sdp: ''
-				});
-				this.signalingState = 'stable';
-				this.iceConnectionState = 'new';
-				this.iceGatheringState = 'new';
-
-				this.iceOptions = {
-					gatherPolicy: 'all',
-					iceServers: []
-				};
-				if (config && config.iceTransportPolicy) {
-					switch (config.iceTransportPolicy) {
-						case 'all':
-						case 'relay':
-							this.iceOptions.gatherPolicy = config.iceTransportPolicy;
-							break;
-						case 'none':
-							// FIXME: remove once implementation and spec have added this.
-							throw new TypeError('iceTransportPolicy "none" not supported');
-						default:
-							// don't set iceTransportPolicy.
-							break;
-					}
-				}
-				this.usingBundle = config && config.bundlePolicy === 'max-bundle';
-
-				if (config && config.iceServers) {
-					// Edge does not like
-					// 1) stun:
-					// 2) turn: that does not have all of turn:host:port?transport=udp
-					var iceServers = JSON.parse(JSON.stringify(config.iceServers));
-					this.iceOptions.iceServers = iceServers.filter(function(server) {
-						if (server && server.urls) {
-							var urls = server.urls;
-							if (typeof urls === 'string') {
-								urls = [urls];
-							}
-							urls = urls.filter(function(url) {
-								return url.indexOf('turn:') === 0 &&
-									url.indexOf('transport=udp') !== -1;
-							})[0];
-							return !!urls;
-						}
-						return false;
-					});
-				}
-
-				// per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
-				// everything that is needed to describe a SDP m-line.
-				this.transceivers = [];
-
-				// since the iceGatherer is currently created in createOffer but we
-				// must not emit candidates until after setLocalDescription we buffer
-				// them in this array.
-				this._localIceCandidatesBuffer = [];
-			};
-
-			window.RTCPeerConnection.prototype._emitBufferedCandidates = function() {
-				var self = this;
-				var sections = SDPUtils.splitSections(self.localDescription.sdp);
-				// FIXME: need to apply ice candidates in a way which is async but
-				// in-order
-				this._localIceCandidatesBuffer.forEach(function(event) {
-					var end = !event.candidate || Object.keys(event.candidate).length === 0;
-					if (end) {
-						for (var j = 1; j < sections.length; j++) {
-							if (sections[j].indexOf('\r\na=end-of-candidates\r\n') === -1) {
-								sections[j] += 'a=end-of-candidates\r\n';
-							}
-						}
-					} else if (event.candidate.candidate.indexOf('typ endOfCandidates')
-						=== -1) {
-						sections[event.candidate.sdpMLineIndex + 1] +=
-							'a=' + event.candidate.candidate + '\r\n';
-					}
-					self.localDescription.sdp = sections.join('');
-					self.dispatchEvent(event);
-					if (self.onicecandidate !== null) {
-						self.onicecandidate(event);
-					}
-					if (!event.candidate && self.iceGatheringState !== 'complete') {
-						var complete = self.transceivers.every(function(transceiver) {
-							return transceiver.iceGatherer &&
-								transceiver.iceGatherer.state === 'completed';
-						});
-						if (complete) {
-							self.iceGatheringState = 'complete';
-						}
-					}
-				});
-				this._localIceCandidatesBuffer = [];
-			};
-
-			window.RTCPeerConnection.prototype.addStream = function(stream) {
-				// Clone is necessary for local demos mostly, attaching directly
-				// to two different senders does not work (build 10547).
-				this.localStreams.push(stream.clone());
-				this._maybeFireNegotiationNeeded();
-			};
-
-			window.RTCPeerConnection.prototype.removeStream = function(stream) {
-				var idx = this.localStreams.indexOf(stream);
-				if (idx > -1) {
-					this.localStreams.splice(idx, 1);
-					this._maybeFireNegotiationNeeded();
-				}
-			};
-
-			window.RTCPeerConnection.prototype.getSenders = function() {
-				return this.transceivers.filter(function(transceiver) {
-					return !!transceiver.rtpSender;
-				})
-					.map(function(transceiver) {
-						return transceiver.rtpSender;
-					});
-			};
-
-			window.RTCPeerConnection.prototype.getReceivers = function() {
-				return this.transceivers.filter(function(transceiver) {
-					return !!transceiver.rtpReceiver;
-				})
-					.map(function(transceiver) {
-						return transceiver.rtpReceiver;
-					});
-			};
-
-			// Determines the intersection of local and remote capabilities.
-			window.RTCPeerConnection.prototype._getCommonCapabilities =
-				function(localCapabilities, remoteCapabilities) {
-					var commonCapabilities = {
-						codecs: [],
-						headerExtensions: [],
-						fecMechanisms: []
-					};
-					localCapabilities.codecs.forEach(function(lCodec) {
-						for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
-							var rCodec = remoteCapabilities.codecs[i];
-							if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
-								lCodec.clockRate === rCodec.clockRate &&
-								lCodec.numChannels === rCodec.numChannels) {
-								// push rCodec so we reply with offerer payload type
-								commonCapabilities.codecs.push(rCodec);
-
-								// FIXME: also need to determine intersection between
-								// .rtcpFeedback and .parameters
-								break;
-							}
-						}
-					});
-
-					localCapabilities.headerExtensions
-						.forEach(function(lHeaderExtension) {
-							for (var i = 0; i < remoteCapabilities.headerExtensions.length;
-								 i++) {
-								var rHeaderExtension = remoteCapabilities.headerExtensions[i];
-								if (lHeaderExtension.uri === rHeaderExtension.uri) {
-									commonCapabilities.headerExtensions.push(rHeaderExtension);
-									break;
-								}
-							}
-						});
-
-					// FIXME: fecMechanisms
-					return commonCapabilities;
-				};
-
-			// Create ICE gatherer, ICE transport and DTLS transport.
-			window.RTCPeerConnection.prototype._createIceAndDtlsTransports =
-				function(mid, sdpMLineIndex) {
-					var self = this;
-					var iceGatherer = new RTCIceGatherer(self.iceOptions);
-					var iceTransport = new RTCIceTransport(iceGatherer);
-					iceGatherer.onlocalcandidate = function(evt) {
-						var event = new Event('icecandidate');
-						event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};
-
-						var cand = evt.candidate;
-						var end = !cand || Object.keys(cand).length === 0;
-						// Edge emits an empty object for RTCIceCandidateComplete‥
-						if (end) {
-							// polyfill since RTCIceGatherer.state is not implemented in
-							// Edge 10547 yet.
-							if (iceGatherer.state === undefined) {
-								iceGatherer.state = 'completed';
-							}
-
-							// Emit a candidate with type endOfCandidates to make the samples
-							// work. Edge requires addIceCandidate with this empty candidate
-							// to start checking. The real solution is to signal
-							// end-of-candidates to the other side when getting the null
-							// candidate but some apps (like the samples) don't do that.
-							event.candidate.candidate =
-								'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
-						} else {
-							// RTCIceCandidate doesn't have a component, needs to be added
-							cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
-							event.candidate.candidate = SDPUtils.writeCandidate(cand);
-						}
-
-						// update local description.
-						var sections = SDPUtils.splitSections(self.localDescription.sdp);
-						if (event.candidate.candidate.indexOf('typ endOfCandidates')
-							=== -1) {
-							sections[event.candidate.sdpMLineIndex + 1] +=
-								'a=' + event.candidate.candidate + '\r\n';
-						} else {
-							sections[event.candidate.sdpMLineIndex + 1] +=
-								'a=end-of-candidates\r\n';
-						}
-						self.localDescription.sdp = sections.join('');
-
-						var complete = self.transceivers.every(function(transceiver) {
-							return transceiver.iceGatherer &&
-								transceiver.iceGatherer.state === 'completed';
-						});
-
-						// Emit candidate if localDescription is set.
-						// Also emits null candidate when all gatherers are complete.
-						switch (self.iceGatheringState) {
-							case 'new':
-								self._localIceCandidatesBuffer.push(event);
-								if (end && complete) {
-									self._localIceCandidatesBuffer.push(
-										new Event('icecandidate'));
-								}
-								break;
-							case 'gathering':
-								self._emitBufferedCandidates();
-								self.dispatchEvent(event);
-								if (self.onicecandidate !== null) {
-									self.onicecandidate(event);
-								}
-								if (complete) {
-									self.dispatchEvent(new Event('icecandidate'));
-									if (self.onicecandidate !== null) {
-										self.onicecandidate(new Event('icecandidate'));
-									}
-									self.iceGatheringState = 'complete';
-								}
-								break;
-							case 'complete':
-								// should not happen... currently!
-								break;
-							default: // no-op.
-								break;
-						}
-					};
-					iceTransport.onicestatechange = function() {
-						self._updateConnectionState();
-					};
-
-					var dtlsTransport = new RTCDtlsTransport(iceTransport);
-					dtlsTransport.ondtlsstatechange = function() {
-						self._updateConnectionState();
-					};
-					dtlsTransport.onerror = function() {
-						// onerror does not set state to failed by itself.
-						dtlsTransport.state = 'failed';
-						self._updateConnectionState();
-					};
-
-					return {
-						iceGatherer: iceGatherer,
-						iceTransport: iceTransport,
-						dtlsTransport: dtlsTransport
-					};
-				};
-
-			// Start the RTP Sender and Receiver for a transceiver.
-			window.RTCPeerConnection.prototype._transceive = function(transceiver,
-																	  send, recv) {
-				var params = this._getCommonCapabilities(transceiver.localCapabilities,
-					transceiver.remoteCapabilities);
-				if (send && transceiver.rtpSender) {
-					params.encodings = transceiver.sendEncodingParameters;
-					params.rtcp = {
-						cname: SDPUtils.localCName
-					};
-					if (transceiver.recvEncodingParameters.length) {
-						params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
-					}
-					transceiver.rtpSender.send(params);
-				}
-				if (recv && transceiver.rtpReceiver) {
-					params.encodings = transceiver.recvEncodingParameters;
-					params.rtcp = {
-						cname: transceiver.cname
-					};
-					if (transceiver.sendEncodingParameters.length) {
-						params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
-					}
-					transceiver.rtpReceiver.receive(params);
-				}
-			};
-
-			window.RTCPeerConnection.prototype.setLocalDescription =
-				function(description) {
-					var self = this;
-					var sections;
-					var sessionpart;
-					if (description.type === 'offer') {
-						// FIXME: What was the purpose of this empty if statement?
-						// if (!this._pendingOffer) {
-						// } else {
-						if (this._pendingOffer) {
-							// VERY limited support for SDP munging. Limited to:
-							// * changing the order of codecs
-							sections = SDPUtils.splitSections(description.sdp);
-							sessionpart = sections.shift();
-							sections.forEach(function(mediaSection, sdpMLineIndex) {
-								var caps = SDPUtils.parseRtpParameters(mediaSection);
-								self._pendingOffer[sdpMLineIndex].localCapabilities = caps;
-							});
-							this.transceivers = this._pendingOffer;
-							delete this._pendingOffer;
-						}
-					} else if (description.type === 'answer') {
-						sections = SDPUtils.splitSections(self.remoteDescription.sdp);
-						sessionpart = sections.shift();
-						var isIceLite = SDPUtils.matchPrefix(sessionpart,
-								'a=ice-lite').length > 0;
-						sections.forEach(function(mediaSection, sdpMLineIndex) {
-							var transceiver = self.transceivers[sdpMLineIndex];
-							var iceGatherer = transceiver.iceGatherer;
-							var iceTransport = transceiver.iceTransport;
-							var dtlsTransport = transceiver.dtlsTransport;
-							var localCapabilities = transceiver.localCapabilities;
-							var remoteCapabilities = transceiver.remoteCapabilities;
-							var rejected = mediaSection.split('\n', 1)[0]
-									.split(' ', 2)[1] === '0';
-
-							if (!rejected) {
-								var remoteIceParameters = SDPUtils.getIceParameters(
-									mediaSection, sessionpart);
-								if (isIceLite) {
-									var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
-										.map(function(cand) {
-											return SDPUtils.parseCandidate(cand);
-										})
-										.filter(function(cand) {
-											return cand.component === '1';
-										});
-									// ice-lite only includes host candidates in the SDP so we can
-									// use setRemoteCandidates (which implies an
-									// RTCIceCandidateComplete)
-									if (cands.length) {
-										iceTransport.setRemoteCandidates(cands);
-									}
-								}
-								var remoteDtlsParameters = SDPUtils.getDtlsParameters(
-									mediaSection, sessionpart);
-								if (isIceLite) {
-									remoteDtlsParameters.role = 'server';
-								}
-
-								if (!self.usingBundle || sdpMLineIndex === 0) {
-									iceTransport.start(iceGatherer, remoteIceParameters,
-										isIceLite ? 'controlling' : 'controlled');
-									dtlsTransport.start(remoteDtlsParameters);
-								}
-
-								// Calculate intersection of capabilities.
-								var params = self._getCommonCapabilities(localCapabilities,
-									remoteCapabilities);
-
-								// Start the RTCRtpSender. The RTCRtpReceiver for this
-								// transceiver has already been started in setRemoteDescription.
-								self._transceive(transceiver,
-									params.codecs.length > 0,
-									false);
-							}
-						});
-					}
-
-					this.localDescription = {
-						type: description.type,
-						sdp: description.sdp
-					};
-					switch (description.type) {
-						case 'offer':
-							this._updateSignalingState('have-local-offer');
-							break;
-						case 'answer':
-							this._updateSignalingState('stable');
-							break;
-						default:
-							throw new TypeError('unsupported type "' + description.type +
-								'"');
-					}
-
-					// If a success callback was provided, emit ICE candidates after it
-					// has been executed. Otherwise, emit callback after the Promise is
-					// resolved.
-					var hasCallback = arguments.length > 1 &&
-						typeof arguments[1] === 'function';
-					if (hasCallback) {
-						var cb = arguments[1];
-						window.setTimeout(function() {
-							cb();
-							if (self.iceGatheringState === 'new') {
-								self.iceGatheringState = 'gathering';
-							}
-							self._emitBufferedCandidates();
-						}, 0);
-					}
-					var p = Promise.resolve();
-					p.then(function() {
-						if (!hasCallback) {
-							if (self.iceGatheringState === 'new') {
-								self.iceGatheringState = 'gathering';
-							}
-							// Usually candidates will be emitted earlier.
-							window.setTimeout(self._emitBufferedCandidates.bind(self), 500);
-						}
-					});
-					return p;
-				};
-
-			window.RTCPeerConnection.prototype.setRemoteDescription =
-				function(description) {
-					var self = this;
-					var stream = new MediaStream();
-					var receiverList = [];
-					var sections = SDPUtils.splitSections(description.sdp);
-					var sessionpart = sections.shift();
-					var isIceLite = SDPUtils.matchPrefix(sessionpart,
-							'a=ice-lite').length > 0;
-					this.usingBundle = SDPUtils.matchPrefix(sessionpart,
-							'a=group:BUNDLE ').length > 0;
-					sections.forEach(function(mediaSection, sdpMLineIndex) {
-						var lines = SDPUtils.splitLines(mediaSection);
-						var mline = lines[0].substr(2).split(' ');
-						var kind = mline[0];
-						var rejected = mline[1] === '0';
-						var direction = SDPUtils.getDirection(mediaSection, sessionpart);
-
-						var transceiver;
-						var iceGatherer;
-						var iceTransport;
-						var dtlsTransport;
-						var rtpSender;
-						var rtpReceiver;
-						var sendEncodingParameters;
-						var recvEncodingParameters;
-						var localCapabilities;
-
-						var track;
-						// FIXME: ensure the mediaSection has rtcp-mux set.
-						var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
-						var remoteIceParameters;
-						var remoteDtlsParameters;
-						if (!rejected) {
-							remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
-								sessionpart);
-							remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
-								sessionpart);
-							remoteDtlsParameters.role = 'client';
-						}
-						recvEncodingParameters =
-							SDPUtils.parseRtpEncodingParameters(mediaSection);
-
-						var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:');
-						if (mid.length) {
-							mid = mid[0].substr(6);
-						} else {
-							mid = SDPUtils.generateIdentifier();
-						}
-
-						var cname;
-						// Gets the first SSRC. Note that with RTX there might be multiple
-						// SSRCs.
-						var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
-							.map(function(line) {
-								return SDPUtils.parseSsrcMedia(line);
-							})
-							.filter(function(obj) {
-								return obj.attribute === 'cname';
-							})[0];
-						if (remoteSsrc) {
-							cname = remoteSsrc.value;
-						}
-
-						var isComplete = SDPUtils.matchPrefix(mediaSection,
-								'a=end-of-candidates').length > 0;
-						var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
-							.map(function(cand) {
-								return SDPUtils.parseCandidate(cand);
-							})
-							.filter(function(cand) {
-								return cand.component === '1';
-							});
-						if (description.type === 'offer' && !rejected) {
-							var transports = self.usingBundle && sdpMLineIndex > 0 ? {
-									iceGatherer: self.transceivers[0].iceGatherer,
-									iceTransport: self.transceivers[0].iceTransport,
-									dtlsTransport: self.transceivers[0].dtlsTransport
-								} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);
-
-							if (isComplete) {
-								transports.iceTransport.setRemoteCandidates(cands);
-							}
-
-							localCapabilities = RTCRtpReceiver.getCapabilities(kind);
-							sendEncodingParameters = [{
-								ssrc: (2 * sdpMLineIndex + 2) * 1001
-							}];
-
-							rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
-
-							track = rtpReceiver.track;
-							receiverList.push([track, rtpReceiver]);
-							// FIXME: not correct when there are multiple streams but that is
-							// not currently supported in this shim.
-							stream.addTrack(track);
-
-							// FIXME: look at direction.
-							if (self.localStreams.length > 0 &&
-								self.localStreams[0].getTracks().length >= sdpMLineIndex) {
-								// FIXME: actually more complicated, needs to match types etc
-								var localtrack = self.localStreams[0]
-									.getTracks()[sdpMLineIndex];
-								rtpSender = new RTCRtpSender(localtrack,
-									transports.dtlsTransport);
-							}
-
-							self.transceivers[sdpMLineIndex] = {
-								iceGatherer: transports.iceGatherer,
-								iceTransport: transports.iceTransport,
-								dtlsTransport: transports.dtlsTransport,
-								localCapabilities: localCapabilities,
-								remoteCapabilities: remoteCapabilities,
-								rtpSender: rtpSender,
-								rtpReceiver: rtpReceiver,
-								kind: kind,
-								mid: mid,
-								cname: cname,
-								sendEncodingParameters: sendEncodingParameters,
-								recvEncodingParameters: recvEncodingParameters
-							};
-							// Start the RTCRtpReceiver now. The RTPSender is started in
-							// setLocalDescription.
-							self._transceive(self.transceivers[sdpMLineIndex],
-								false,
-								direction === 'sendrecv' || direction === 'sendonly');
-						} else if (description.type === 'answer' && !rejected) {
-							transceiver = self.transceivers[sdpMLineIndex];
-							iceGatherer = transceiver.iceGatherer;
-							iceTransport = transceiver.iceTransport;
-							dtlsTransport = transceiver.dtlsTransport;
-							rtpSender = transceiver.rtpSender;
-							rtpReceiver = transceiver.rtpReceiver;
-							sendEncodingParameters = transceiver.sendEncodingParameters;
-							localCapabilities = transceiver.localCapabilities;
-
-							self.transceivers[sdpMLineIndex].recvEncodingParameters =
-								recvEncodingParameters;
-							self.transceivers[sdpMLineIndex].remoteCapabilities =
-								remoteCapabilities;
-							self.transceivers[sdpMLineIndex].cname = cname;
-
-							if ((isIceLite || isComplete) && cands.length) {
-								iceTransport.setRemoteCandidates(cands);
-							}
-							if (!self.usingBundle || sdpMLineIndex === 0) {
-								iceTransport.start(iceGatherer, remoteIceParameters,
-									'controlling');
-								dtlsTransport.start(remoteDtlsParameters);
-							}
-
-							self._transceive(transceiver,
-								direction === 'sendrecv' || direction === 'recvonly',
-								direction === 'sendrecv' || direction === 'sendonly');
-
-							if (rtpReceiver &&
-								(direction === 'sendrecv' || direction === 'sendonly')) {
-								track = rtpReceiver.track;
-								receiverList.push([track, rtpReceiver]);
-								stream.addTrack(track);
-							} else {
-								// FIXME: actually the receiver should be created later.
-								delete transceiver.rtpReceiver;
-							}
-						}
-					});
-
-					this.remoteDescription = {
-						type: description.type,
-						sdp: description.sdp
-					};
-					switch (description.type) {
-						case 'offer':
-							this._updateSignalingState('have-remote-offer');
-							break;
-						case 'answer':
-							this._updateSignalingState('stable');
-							break;
-						default:
-							throw new TypeError('unsupported type "' + description.type +
-								'"');
-					}
-					if (stream.getTracks().length) {
-						self.remoteStreams.push(stream);
-						window.setTimeout(function() {
-							var event = new Event('addstream');
-							event.stream = stream;
-							self.dispatchEvent(event);
-							if (self.onaddstream !== null) {
-								window.setTimeout(function() {
-									self.onaddstream(event);
-								}, 0);
-							}
-
-							receiverList.forEach(function(item) {
-								var track = item[0];
-								var receiver = item[1];
-								var trackEvent = new Event('track');
-								trackEvent.track = track;
-								trackEvent.receiver = receiver;
-								trackEvent.streams = [stream];
-								self.dispatchEvent(event);
-								if (self.ontrack !== null) {
-									window.setTimeout(function() {
-										self.ontrack(trackEvent);
-									}, 0);
-								}
-							});
-						}, 0);
-					}
-					if (arguments.length > 1 && typeof arguments[1] === 'function') {
-						window.setTimeout(arguments[1], 0);
-					}
-					return Promise.resolve();
-				};
-
-			window.RTCPeerConnection.prototype.close = function() {
-				this.transceivers.forEach(function(transceiver) {
-					/* not yet
-					 if (transceiver.iceGatherer) {
-					 transceiver.iceGatherer.close();
-					 }
-					 */
-					if (transceiver.iceTransport) {
-						transceiver.iceTransport.stop();
-					}
-					if (transceiver.dtlsTransport) {
-						transceiver.dtlsTransport.stop();
-					}
-					if (transceiver.rtpSender) {
-						transceiver.rtpSender.stop();
-					}
-					if (transceiver.rtpReceiver) {
-						transceiver.rtpReceiver.stop();
-					}
-				});
-				// FIXME: clean up tracks, local streams, remote streams, etc
-				this._updateSignalingState('closed');
-			};
-
-			// Update the signaling state.
-			window.RTCPeerConnection.prototype._updateSignalingState =
-				function(newState) {
-					this.signalingState = newState;
-					var event = new Event('signalingstatechange');
-					this.dispatchEvent(event);
-					if (this.onsignalingstatechange !== null) {
-						this.onsignalingstatechange(event);
-					}
-				};
-
-			// Determine whether to fire the negotiationneeded event.
-			window.RTCPeerConnection.prototype._maybeFireNegotiationNeeded =
-				function() {
-					// Fire away (for now).
-					var event = new Event('negotiationneeded');
-					this.dispatchEvent(event);
-					if (this.onnegotiationneeded !== null) {
-						this.onnegotiationneeded(event);
-					}
-				};
-
-			// Update the connection state.
-			window.RTCPeerConnection.prototype._updateConnectionState = function() {
-				var self = this;
-				var newState;
-				var states = {
-					'new': 0,
-					closed: 0,
-					connecting: 0,
-					checking: 0,
-					connected: 0,
-					completed: 0,
-					failed: 0
-				};
-				this.transceivers.forEach(function(transceiver) {
-					states[transceiver.iceTransport.state]++;
-					states[transceiver.dtlsTransport.state]++;
-				});
-				// ICETransport.completed and connected are the same for this purpose.
-				states.connected += states.completed;
-
-				newState = 'new';
-				if (states.failed > 0) {
-					newState = 'failed';
-				} else if (states.connecting > 0 || states.checking > 0) {
-					newState = 'connecting';
-				} else if (states.disconnected > 0) {
-					newState = 'disconnected';
-				} else if (states.new > 0) {
-					newState = 'new';
-				} else if (states.connected > 0 || states.completed > 0) {
-					newState = 'connected';
-				}
-
-				if (newState !== self.iceConnectionState) {
-					self.iceConnectionState = newState;
-					var event = new Event('iceconnectionstatechange');
-					this.dispatchEvent(event);
-					if (this.oniceconnectionstatechange !== null) {
-						this.oniceconnectionstatechange(event);
-					}
-				}
-			};
-
-			window.RTCPeerConnection.prototype.createOffer = function() {
-				var self = this;
-				if (this._pendingOffer) {
-					throw new Error('createOffer called while there is a pending offer.');
-				}
-				var offerOptions;
-				if (arguments.length === 1 && typeof arguments[0] !== 'function') {
-					offerOptions = arguments[0];
-				} else if (arguments.length === 3) {
-					offerOptions = arguments[2];
-				}
-
-				var tracks = [];
-				var numAudioTracks = 0;
-				var numVideoTracks = 0;
-				// Default to sendrecv.
-				if (this.localStreams.length) {
-					numAudioTracks = this.localStreams[0].getAudioTracks().length;
-					numVideoTracks = this.localStreams[0].getVideoTracks().length;
-				}
-				// Determine number of audio and video tracks we need to send/recv.
-				if (offerOptions) {
-					// Reject Chrome legacy constraints.
-					if (offerOptions.mandatory || offerOptions.optional) {
-						throw new TypeError(
-							'Legacy mandatory/optional constraints not supported.');
-					}
-					if (offerOptions.offerToReceiveAudio !== undefined) {
-						numAudioTracks = offerOptions.offerToReceiveAudio;
-					}
-					if (offerOptions.offerToReceiveVideo !== undefined) {
-						numVideoTracks = offerOptions.offerToReceiveVideo;
-					}
-				}
-				if (this.localStreams.length) {
-					// Push local streams.
-					this.localStreams[0].getTracks().forEach(function(track) {
-						tracks.push({
-							kind: track.kind,
-							track: track,
-							wantReceive: track.kind === 'audio' ?
-								numAudioTracks > 0 : numVideoTracks > 0
-						});
-						if (track.kind === 'audio') {
-							numAudioTracks--;
-						} else if (track.kind === 'video') {
-							numVideoTracks--;
-						}
-					});
-				}
-				// Create M-lines for recvonly streams.
-				while (numAudioTracks > 0 || numVideoTracks > 0) {
-					if (numAudioTracks > 0) {
-						tracks.push({
-							kind: 'audio',
-							wantReceive: true
-						});
-						numAudioTracks--;
-					}
-					if (numVideoTracks > 0) {
-						tracks.push({
-							kind: 'video',
-							wantReceive: true
-						});
-						numVideoTracks--;
-					}
-				}
-
-				var sdp = SDPUtils.writeSessionBoilerplate();
-				var transceivers = [];
-				tracks.forEach(function(mline, sdpMLineIndex) {
-					// For each track, create an ice gatherer, ice transport,
-					// dtls transport, potentially rtpsender and rtpreceiver.
-					var track = mline.track;
-					var kind = mline.kind;
-					var mid = SDPUtils.generateIdentifier();
-
-					var transports = self.usingBundle && sdpMLineIndex > 0 ? {
-							iceGatherer: transceivers[0].iceGatherer,
-							iceTransport: transceivers[0].iceTransport,
-							dtlsTransport: transceivers[0].dtlsTransport
-						} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);
-
-					var localCapabilities = RTCRtpSender.getCapabilities(kind);
-					var rtpSender;
-					var rtpReceiver;
-
-					// generate an ssrc now, to be used later in rtpSender.send
-					var sendEncodingParameters = [{
-						ssrc: (2 * sdpMLineIndex + 1) * 1001
-					}];
-					if (track) {
-						rtpSender = new RTCRtpSender(track, transports.dtlsTransport);
-					}
-
-					if (mline.wantReceive) {
-						rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
-					}
-
-					transceivers[sdpMLineIndex] = {
-						iceGatherer: transports.iceGatherer,
-						iceTransport: transports.iceTransport,
-						dtlsTransport: transports.dtlsTransport,
-						localCapabilities: localCapabilities,
-						remoteCapabilities: null,
-						rtpSender: rtpSender,
-						rtpReceiver: rtpReceiver,
-						kind: kind,
-						mid: mid,
-						sendEncodingParameters: sendEncodingParameters,
-						recvEncodingParameters: null
-					};
-				});
-				if (this.usingBundle) {
-					sdp += 'a=group:BUNDLE ' + transceivers.map(function(t) {
-							return t.mid;
-						}).join(' ') + '\r\n';
-				}
-				tracks.forEach(function(mline, sdpMLineIndex) {
-					var transceiver = transceivers[sdpMLineIndex];
-					sdp += SDPUtils.writeMediaSection(transceiver,
-						transceiver.localCapabilities, 'offer', self.localStreams[0]);
-				});
-
-				this._pendingOffer = transceivers;
-				var desc = new RTCSessionDescription({
-					type: 'offer',
-					sdp: sdp
-				});
-				if (arguments.length && typeof arguments[0] === 'function') {
-					window.setTimeout(arguments[0], 0, desc);
-				}
-				return Promise.resolve(desc);
-			};
-
-			window.RTCPeerConnection.prototype.createAnswer = function() {
-				var self = this;
-
-				var sdp = SDPUtils.writeSessionBoilerplate();
-				if (this.usingBundle) {
-					sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) {
-							return t.mid;
-						}).join(' ') + '\r\n';
-				}
-				this.transceivers.forEach(function(transceiver) {
-					// Calculate intersection of capabilities.
-					var commonCapabilities = self._getCommonCapabilities(
-						transceiver.localCapabilities,
-						transceiver.remoteCapabilities);
-
-					sdp += SDPUtils.writeMediaSection(transceiver, commonCapabilities,
-						'answer', self.localStreams[0]);
-				});
-
-				var desc = new RTCSessionDescription({
-					type: 'answer',
-					sdp: sdp
-				});
-				if (arguments.length && typeof arguments[0] === 'function') {
-					window.setTimeout(arguments[0], 0, desc);
-				}
-				return Promise.resolve(desc);
-			};
-
-			window.RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
-				if (candidate === null) {
-					this.transceivers.forEach(function(transceiver) {
-						transceiver.iceTransport.addRemoteCandidate({});
-					});
-				} else {
-					var mLineIndex = candidate.sdpMLineIndex;
-					if (candidate.sdpMid) {
-						for (var i = 0; i < this.transceivers.length; i++) {
-							if (this.transceivers[i].mid === candidate.sdpMid) {
-								mLineIndex = i;
-								break;
-							}
-						}
-					}
-					var transceiver = this.transceivers[mLineIndex];
-					if (transceiver) {
-						var cand = Object.keys(candidate.candidate).length > 0 ?
-							SDPUtils.parseCandidate(candidate.candidate) : {};
-						// Ignore Chrome's invalid candidates since Edge does not like them.
-						if (cand.protocol === 'tcp' && cand.port === 0) {
-							return;
-						}
-						// Ignore RTCP candidates, we assume RTCP-MUX.
-						if (cand.component !== '1') {
-							return;
-						}
-						// A dirty hack to make samples work.
-						if (cand.type === 'endOfCandidates') {
-							cand = {};
-						}
-						transceiver.iceTransport.addRemoteCandidate(cand);
-
-						// update the remoteDescription.
-						var sections = SDPUtils.splitSections(this.remoteDescription.sdp);
-						sections[mLineIndex + 1] += (cand.type ? candidate.candidate.trim()
-								: 'a=end-of-candidates') + '\r\n';
-						this.remoteDescription.sdp = sections.join('');
-					}
-				}
-				if (arguments.length > 1 && typeof arguments[1] === 'function') {
-					window.setTimeout(arguments[1], 0);
-				}
-				return Promise.resolve();
-			};
-
-			window.RTCPeerConnection.prototype.getStats = function() {
-				var promises = [];
-				this.transceivers.forEach(function(transceiver) {
-					['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
-						'dtlsTransport'].forEach(function(method) {
-						if (transceiver[method]) {
-							promises.push(transceiver[method].getStats());
-						}
-					});
-				});
-				var cb = arguments.length > 1 && typeof arguments[1] === 'function' &&
-					arguments[1];
-				return new Promise(function(resolve) {
-					// shim getStats with maplike support
-					var results = new Map();
-					Promise.all(promises).then(function(res) {
-						res.forEach(function(result) {
-							Object.keys(result).forEach(function(id) {
-								results.set(id, result[id]);
-								results[id] = result[id];
-							});
-						});
-						if (cb) {
-							window.setTimeout(cb, 0, results);
-						}
-						resolve(results);
-					});
-				});
-			};
-		},
-
-		// Attach a media stream to an element.
-		attachMediaStream: function(element, stream) {
-			logging('DEPRECATED, attachMediaStream will soon be removed.');
-			element.srcObject = stream;
-		},
-
-		reattachMediaStream: function(to, from) {
-			logging('DEPRECATED, reattachMediaStream will soon be removed.');
-			to.srcObject = from.srcObject;
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimPeerConnection: edgeShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia'),
-		attachMediaStream: edgeShim.attachMediaStream,
-		reattachMediaStream: edgeShim.reattachMediaStream
-	};
-
-},{"../utils":38,"./getusermedia":34,"sdp":62}],34:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-// Expose public methods.
-	module.exports = function() {
-		var shimError_ = function(e) {
-			return {
-				name: {PermissionDeniedError: 'NotAllowedError'}[e.name] || e.name,
-				message: e.message,
-				constraint: e.constraint,
-				toString: function() {
-					return this.name;
-				}
-			};
-		};
-
-		// getUserMedia error shim.
-		var origGetUserMedia = navigator.mediaDevices.getUserMedia.
-		bind(navigator.mediaDevices);
-		navigator.mediaDevices.getUserMedia = function(c) {
-			return origGetUserMedia(c).catch(function(e) {
-				return Promise.reject(shimError_(e));
-			});
-		};
-	};
-
-},{}],35:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var logging = require('../utils').log;
-	var browserDetails = require('../utils').browserDetails;
-
-	var firefoxShim = {
-		shimOnTrack: function() {
-			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
-				window.RTCPeerConnection.prototype)) {
-				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
-					get: function() {
-						return this._ontrack;
-					},
-					set: function(f) {
-						if (this._ontrack) {
-							this.removeEventListener('track', this._ontrack);
-							this.removeEventListener('addstream', this._ontrackpoly);
-						}
-						this.addEventListener('track', this._ontrack = f);
-						this.addEventListener('addstream', this._ontrackpoly = function(e) {
-							e.stream.getTracks().forEach(function(track) {
-								var event = new Event('track');
-								event.track = track;
-								event.receiver = {track: track};
-								event.streams = [e.stream];
-								this.dispatchEvent(event);
-							}.bind(this));
-						}.bind(this));
-					}
-				});
-			}
-		},
-
-		shimSourceObject: function() {
-			// Firefox has supported mozSrcObject since FF22, unprefixed in 42.
-			if (typeof window === 'object') {
-				if (window.HTMLMediaElement &&
-					!('srcObject' in window.HTMLMediaElement.prototype)) {
-					// Shim the srcObject property, once, when HTMLMediaElement is found.
-					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
-						get: function() {
-							return this.mozSrcObject;
-						},
-						set: function(stream) {
-							this.mozSrcObject = stream;
-						}
-					});
-				}
-			}
-		},
-
-		shimPeerConnection: function() {
-			if (typeof window !== 'object' || !(window.RTCPeerConnection ||
-				window.mozRTCPeerConnection)) {
-				return; // probably media.peerconnection.enabled=false in about:config
-			}
-			// The RTCPeerConnection object.
-			if (!window.RTCPeerConnection) {
-				window.RTCPeerConnection = function(pcConfig, pcConstraints) {
-					if (browserDetails.version < 38) {
-						// .urls is not supported in FF < 38.
-						// create RTCIceServers with a single url.
-						if (pcConfig && pcConfig.iceServers) {
-							var newIceServers = [];
-							for (var i = 0; i < pcConfig.iceServers.length; i++) {
-								var server = pcConfig.iceServers[i];
-								if (server.hasOwnProperty('urls')) {
-									for (var j = 0; j < server.urls.length; j++) {
-										var newServer = {
-											url: server.urls[j]
-										};
-										if (server.urls[j].indexOf('turn') === 0) {
-											newServer.username = server.username;
-											newServer.credential = server.credential;
-										}
-										newIceServers.push(newServer);
-									}
-								} else {
-									newIceServers.push(pcConfig.iceServers[i]);
-								}
-							}
-							pcConfig.iceServers = newIceServers;
-						}
-					}
-					return new mozRTCPeerConnection(pcConfig, pcConstraints);
-				};
-				window.RTCPeerConnection.prototype = mozRTCPeerConnection.prototype;
-
-				// wrap static methods. Currently just generateCertificate.
-				if (mozRTCPeerConnection.generateCertificate) {
-					Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
-						get: function() {
-							return mozRTCPeerConnection.generateCertificate;
-						}
-					});
-				}
-
-				window.RTCSessionDescription = mozRTCSessionDescription;
-				window.RTCIceCandidate = mozRTCIceCandidate;
-			}
-
-			// shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
-			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-				.forEach(function(method) {
-					var nativeMethod = RTCPeerConnection.prototype[method];
-					RTCPeerConnection.prototype[method] = function() {
-						arguments[0] = new ((method === 'addIceCandidate') ?
-							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
-						return nativeMethod.apply(this, arguments);
-					};
-				});
-
-			// support for addIceCandidate(null)
-			var nativeAddIceCandidate =
-				RTCPeerConnection.prototype.addIceCandidate;
-			RTCPeerConnection.prototype.addIceCandidate = function() {
-				return arguments[0] === null ? Promise.resolve()
-					: nativeAddIceCandidate.apply(this, arguments);
-			};
-
-			// shim getStats with maplike support
-			var makeMapStats = function(stats) {
-				var map = new Map();
-				Object.keys(stats).forEach(function(key) {
-					map.set(key, stats[key]);
-					map[key] = stats[key];
-				});
-				return map;
-			};
-
-			var nativeGetStats = RTCPeerConnection.prototype.getStats;
-			RTCPeerConnection.prototype.getStats = function(selector, onSucc, onErr) {
-				return nativeGetStats.apply(this, [selector || null])
-					.then(function(stats) {
-						return makeMapStats(stats);
-					})
-					.then(onSucc, onErr);
-			};
-		},
-
-		// Attach a media stream to an element.
-		attachMediaStream: function(element, stream) {
-			logging('DEPRECATED, attachMediaStream will soon be removed.');
-			element.srcObject = stream;
-		},
-
-		reattachMediaStream: function(to, from) {
-			logging('DEPRECATED, reattachMediaStream will soon be removed.');
-			to.srcObject = from.srcObject;
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimOnTrack: firefoxShim.shimOnTrack,
-		shimSourceObject: firefoxShim.shimSourceObject,
-		shimPeerConnection: firefoxShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia'),
-		attachMediaStream: firefoxShim.attachMediaStream,
-		reattachMediaStream: firefoxShim.reattachMediaStream
-	};
-
-},{"../utils":38,"./getusermedia":36}],36:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var logging = require('../utils').log;
-	var browserDetails = require('../utils').browserDetails;
-
-// Expose public methods.
-	module.exports = function() {
-		var shimError_ = function(e) {
-			return {
-				name: {
-					SecurityError: 'NotAllowedError',
-					PermissionDeniedError: 'NotAllowedError'
-				}[e.name] || e.name,
-				message: {
-					'The operation is insecure.': 'The request is not allowed by the ' +
-					'user agent or the platform in the current context.'
-				}[e.message] || e.message,
-				constraint: e.constraint,
-				toString: function() {
-					return this.name + (this.message && ': ') + this.message;
-				}
-			};
-		};
-
-		// getUserMedia constraints shim.
-		var getUserMedia_ = function(constraints, onSuccess, onError) {
-			var constraintsToFF37_ = function(c) {
-				if (typeof c !== 'object' || c.require) {
-					return c;
-				}
-				var require = [];
-				Object.keys(c).forEach(function(key) {
-					if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
-						return;
-					}
-					var r = c[key] = (typeof c[key] === 'object') ?
-						c[key] : {ideal: c[key]};
-					if (r.min !== undefined ||
-						r.max !== undefined || r.exact !== undefined) {
-						require.push(key);
-					}
-					if (r.exact !== undefined) {
-						if (typeof r.exact === 'number') {
-							r. min = r.max = r.exact;
-						} else {
-							c[key] = r.exact;
-						}
-						delete r.exact;
-					}
-					if (r.ideal !== undefined) {
-						c.advanced = c.advanced || [];
-						var oc = {};
-						if (typeof r.ideal === 'number') {
-							oc[key] = {min: r.ideal, max: r.ideal};
-						} else {
-							oc[key] = r.ideal;
-						}
-						c.advanced.push(oc);
-						delete r.ideal;
-						if (!Object.keys(r).length) {
-							delete c[key];
-						}
-					}
-				});
-				if (require.length) {
-					c.require = require;
-				}
-				return c;
-			};
-			constraints = JSON.parse(JSON.stringify(constraints));
-			if (browserDetails.version < 38) {
-				logging('spec: ' + JSON.stringify(constraints));
-				if (constraints.audio) {
-					constraints.audio = constraintsToFF37_(constraints.audio);
-				}
-				if (constraints.video) {
-					constraints.video = constraintsToFF37_(constraints.video);
-				}
-				logging('ff37: ' + JSON.stringify(constraints));
-			}
-			return navigator.mozGetUserMedia(constraints, onSuccess, function(e) {
-				onError(shimError_(e));
-			});
-		};
-
-		// Returns the result of getUserMedia as a Promise.
-		var getUserMediaPromise_ = function(constraints) {
-			return new Promise(function(resolve, reject) {
-				getUserMedia_(constraints, resolve, reject);
-			});
-		};
-
-		// Shim for mediaDevices on older versions.
-		if (!navigator.mediaDevices) {
-			navigator.mediaDevices = {getUserMedia: getUserMediaPromise_,
-				addEventListener: function() { },
-				removeEventListener: function() { }
-			};
-		}
-		navigator.mediaDevices.enumerateDevices =
-			navigator.mediaDevices.enumerateDevices || function() {
-				return new Promise(function(resolve) {
-					var infos = [
-						{kind: 'audioinput', deviceId: 'default', label: '', groupId: ''},
-						{kind: 'videoinput', deviceId: 'default', label: '', groupId: ''}
-					];
-					resolve(infos);
-				});
-			};
-
-		if (browserDetails.version < 41) {
-			// Work around http://bugzil.la/1169665
-			var orgEnumerateDevices =
-				navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
-			navigator.mediaDevices.enumerateDevices = function() {
-				return orgEnumerateDevices().then(undefined, function(e) {
-					if (e.name === 'NotFoundError') {
-						return [];
-					}
-					throw e;
-				});
-			};
-		}
-		if (browserDetails.version < 49) {
-			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
-			bind(navigator.mediaDevices);
-			navigator.mediaDevices.getUserMedia = function(c) {
-				return origGetUserMedia(c).catch(function(e) {
-					return Promise.reject(shimError_(e));
-				});
-			};
-		}
-		navigator.getUserMedia = function(constraints, onSuccess, onError) {
-			if (browserDetails.version < 44) {
-				return getUserMedia_(constraints, onSuccess, onError);
-			}
-			// Replace Firefox 44+'s deprecation warning with unprefixed version.
-			console.warn('navigator.getUserMedia has been replaced by ' +
-				'navigator.mediaDevices.getUserMedia');
-			navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
-		};
-	};
-
-},{"../utils":38}],37:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	'use strict';
-	var safariShim = {
-		// TODO: DrAlex, should be here, double check against LayoutTests
-		// shimOnTrack: function() { },
-
-		// TODO: DrAlex
-		// attachMediaStream: function(element, stream) { },
-		// reattachMediaStream: function(to, from) { },
-
-		// TODO: once the back-end for the mac port is done, add.
-		// TODO: check for webkitGTK+
-		// shimPeerConnection: function() { },
-
-		shimGetUserMedia: function() {
-			navigator.getUserMedia = navigator.webkitGetUserMedia;
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimGetUserMedia: safariShim.shimGetUserMedia
-		// TODO
-		// shimOnTrack: safariShim.shimOnTrack,
-		// shimPeerConnection: safariShim.shimPeerConnection,
-		// attachMediaStream: safariShim.attachMediaStream,
-		// reattachMediaStream: safariShim.reattachMediaStream
-	};
-
-},{}],38:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var logDisabled_ = true;
-
-// Utility methods.
-	var utils = {
-		disableLog: function(bool) {
-			if (typeof bool !== 'boolean') {
-				return new Error('Argument type: ' + typeof bool +
-					'. Please use a boolean.');
-			}
-			logDisabled_ = bool;
-			return (bool) ? 'adapter.js logging disabled' :
-				'adapter.js logging enabled';
-		},
-
-		log: function() {
-			if (typeof window === 'object') {
-				if (logDisabled_) {
-					return;
-				}
-				if (typeof console !== 'undefined' && typeof console.log === 'function') {
-					console.log.apply(console, arguments);
-				}
-			}
-		},
-
-		/**
-		 * Extract browser version out of the provided user agent string.
-		 *
-		 * @param {!string} uastring userAgent string.
-		 * @param {!string} expr Regular expression used as match criteria.
-		 * @param {!number} pos position in the version string to be returned.
-		 * @return {!number} browser version.
-		 */
-		extractVersion: function(uastring, expr, pos) {
-			var match = uastring.match(expr);
-			return match && match.length >= pos && parseInt(match[pos], 10);
-		},
-
-		/**
-		 * Browser detector.
-		 *
-		 * @return {object} result containing browser, version and minVersion
-		 *     properties.
-		 */
-		detectBrowser: function() {
-			// Returned result object.
-			var result = {};
-			result.browser = null;
-			result.version = null;
-			result.minVersion = null;
-
-			// Fail early if it's not a browser
-			if (typeof window === 'undefined' || !window.navigator) {
-				result.browser = 'Not a browser.';
-				return result;
-			}
-
-			// Firefox.
-			if (navigator.mozGetUserMedia) {
-				result.browser = 'firefox';
-				result.version = this.extractVersion(navigator.userAgent,
-					/Firefox\/([0-9]+)\./, 1);
-				result.minVersion = 31;
-
-				// all webkit-based browsers
-			} else if (navigator.webkitGetUserMedia) {
-				// Chrome, Chromium, Webview, Opera, all use the chrome shim for now
-				if (window.webkitRTCPeerConnection) {
-					result.browser = 'chrome';
-					result.version = this.extractVersion(navigator.userAgent,
-						/Chrom(e|ium)\/([0-9]+)\./, 2);
-					result.minVersion = 38;
-
-					// Safari or unknown webkit-based
-					// for the time being Safari has support for MediaStreams but not webRTC
-				} else {
-					// Safari UA substrings of interest for reference:
-					// - webkit version:           AppleWebKit/602.1.25 (also used in Op,Cr)
-					// - safari UI version:        Version/9.0.3 (unique to Safari)
-					// - safari UI webkit version: Safari/601.4.4 (also used in Op,Cr)
-					//
-					// if the webkit version and safari UI webkit versions are equals,
-					// ... this is a stable version.
-					//
-					// only the internal webkit version is important today to know if
-					// media streams are supported
-					//
-					if (navigator.userAgent.match(/Version\/(\d+).(\d+)/)) {
-						result.browser = 'safari';
-						result.version = this.extractVersion(navigator.userAgent,
-							/AppleWebKit\/([0-9]+)\./, 1);
-						result.minVersion = 602;
-
-						// unknown webkit-based browser
-					} else {
-						result.browser = 'Unsupported webkit-based browser ' +
-							'with GUM support but no WebRTC support.';
-						return result;
-					}
-				}
-
-				// Edge.
-			} else if (navigator.mediaDevices &&
-				navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
-				result.browser = 'edge';
-				result.version = this.extractVersion(navigator.userAgent,
-					/Edge\/(\d+).(\d+)$/, 2);
-				result.minVersion = 10547;
-
-				// Default fallthrough: not supported.
-			} else {
-				result.browser = 'Not a supported browser.';
-				return result;
-			}
-
-			// Warn if version is less than minVersion.
-			if (result.version < result.minVersion) {
-				utils.log('Browser: ' + result.browser + ' Version: ' + result.version +
-					' < minimum supported version: ' + result.minVersion +
-					'\n some things might not work!');
-			}
-
-			return result;
-		}
-	};
-
-// Export.
-	module.exports = {
-		log: utils.log,
-		disableLog: utils.disableLog,
-		browserDetails: utils.detectBrowser(),
-		extractVersion: utils.extractVersion
-	};
-
-},{}],39:[function(require,module,exports){
-
-	/**
-	 * Returns `this`. Execute this without a "context" (i.e. without it being
-	 * attached to an object of the left-hand side), and `this` points to the
-	 * "global" scope of the current JS execution.
-	 */
-
-	module.exports = (function () { return this; })();
-
-},{}],40:[function(require,module,exports){
-	var WildEmitter = require('wildemitter');
-
-	function getMaxVolume (analyser, fftBins) {
-		var maxVolume = -Infinity;
-		analyser.getFloatFrequencyData(fftBins);
-
-		for(var i=4, ii=fftBins.length; i < ii; i++) {
-			if (fftBins[i] > maxVolume && fftBins[i] < 0) {
-				maxVolume = fftBins[i];
-			}
-		};
-
-		return maxVolume;
-	}
-
-
-	var audioContextType;
-	if (typeof window !== 'undefined') {
-		audioContextType = window.AudioContext || window.webkitAudioContext;
-	}
-// use a single audio context due to hardware limits
-	var audioContext = null;
-	module.exports = function(stream, options) {
-		var harker = new WildEmitter();
-
-
-		// make it not break in non-supported browsers
-		if (!audioContextType) return harker;
-
-		//Config
-		var options = options || {},
-			smoothing = (options.smoothing || 0.1),
-			interval = (options.interval || 50),
-			threshold = options.threshold,
-			play = options.play,
-			history = options.history || 10,
-			running = true;
-
-		//Setup Audio Context
-		if (!audioContext) {
-			audioContext = new audioContextType();
-		}
-		var sourceNode, fftBins, analyser;
-
-		analyser = audioContext.createAnalyser();
-		analyser.fftSize = 512;
-		analyser.smoothingTimeConstant = smoothing;
-		fftBins = new Float32Array(analyser.frequencyBinCount);
-
-		if (stream.jquery) stream = stream[0];
-		if (stream instanceof HTMLAudioElement || stream instanceof HTMLVideoElement) {
-			//Audio Tag
-			sourceNode = audioContext.createMediaElementSource(stream);
-			if (typeof play === 'undefined') play = true;
-			threshold = threshold || -50;
-		} else {
-			//WebRTC Stream
-			sourceNode = audioContext.createMediaStreamSource(stream);
-			threshold = threshold || -50;
-		}
-
-		sourceNode.connect(analyser);
-		if (play) analyser.connect(audioContext.destination);
-
-		harker.speaking = false;
-
-		harker.setThreshold = function(t) {
-			threshold = t;
-		};
-
-		harker.setInterval = function(i) {
-			interval = i;
-		};
-
-		harker.stop = function() {
-			running = false;
-			harker.emit('volume_change', -100, threshold);
-			if (harker.speaking) {
-				harker.speaking = false;
-				harker.emit('stopped_speaking');
-			}
-			analyser.disconnect();
-			sourceNode.disconnect();
-		};
-		harker.speakingHistory = [];
-		for (var i = 0; i < history; i++) {
-			harker.speakingHistory.push(0);
-		}
-
-		// Poll the analyser node to determine if speaking
-		// and emit events if changed
-		var looper = function() {
-			setTimeout(function() {
-
-				//check if stop has been called
-				if(!running) {
-					return;
-				}
-
-				var currentVolume = getMaxVolume(analyser, fftBins);
-
-				harker.emit('volume_change', currentVolume, threshold);
-
-				var history = 0;
-				if (currentVolume > threshold && !harker.speaking) {
-					// trigger quickly, short history
-					for (var i = harker.speakingHistory.length - 3; i < harker.speakingHistory.length; i++) {
-						history += harker.speakingHistory[i];
-					}
-					if (history >= 2) {
-						harker.speaking = true;
-						harker.emit('speaking');
-					}
-				} else if (currentVolume < threshold && harker.speaking) {
-					for (var i = 0; i < harker.speakingHistory.length; i++) {
-						history += harker.speakingHistory[i];
-					}
-					if (history == 0) {
-						harker.speaking = false;
-						harker.emit('stopped_speaking');
-					}
-				}
-				harker.speakingHistory.shift();
-				harker.speakingHistory.push(0 + (currentVolume > threshold));
-
-				looper();
-			}, interval);
-		};
-		looper();
-
-
-		return harker;
-	}
-
-},{"wildemitter":100}],41:[function(require,module,exports){
-	(function (global){
-
-		/*
-		 * Module requirements.
-		 */
-
-		var isArray = require('isarray');
-
-		/**
-		 * Module exports.
-		 */
-
-		module.exports = hasBinary;
-
-		/**
-		 * Checks for binary data.
-		 *
-		 * Right now only Buffer and ArrayBuffer are supported..
-		 *
-		 * @param {Object} anything
-		 * @api public
-		 */
-
-		function hasBinary(data) {
-
-			function _hasBinary(obj) {
-				if (!obj) return false;
-
-				if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
-					(global.ArrayBuffer && obj instanceof ArrayBuffer) ||
-					(global.Blob && obj instanceof Blob) ||
-					(global.File && obj instanceof File)
-				) {
-					return true;
-				}
-
-				if (isArray(obj)) {
-					for (var i = 0; i < obj.length; i++) {
-						if (_hasBinary(obj[i])) {
-							return true;
-						}
-					}
-				} else if (obj && 'object' == typeof obj) {
-					if (obj.toJSON) {
-						obj = obj.toJSON();
-					}
-
-					for (var key in obj) {
-						if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
-							return true;
-						}
-					}
-				}
-
-				return false;
-			}
-
-			return _hasBinary(data);
-		}
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"isarray":42}],42:[function(require,module,exports){
-	module.exports = Array.isArray || function (arr) {
-			return Object.prototype.toString.call(arr) == '[object Array]';
-		};
-
-},{}],43:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var global = require('global');
-
-	/**
-	 * Module exports.
-	 *
-	 * Logic borrowed from Modernizr:
-	 *
-	 *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
-	 */
-
-	try {
-		module.exports = 'XMLHttpRequest' in global &&
-			'withCredentials' in new global.XMLHttpRequest();
-	} catch (err) {
-		// if XMLHttp support is disabled in IE then it will throw
-		// when trying to create
-		module.exports = false;
-	}
-
-},{"global":39}],44:[function(require,module,exports){
-
-	var indexOf = [].indexOf;
-
-	module.exports = function(arr, obj){
-		if (indexOf) return arr.indexOf(obj);
-		for (var i = 0; i < arr.length; ++i) {
-			if (arr[i] === obj) return i;
-		}
-		return -1;
-	};
-},{}],45:[function(require,module,exports){
-	/*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
-	;(function (window) {
-		// Convenience aliases.
-		var getClass = {}.toString, isProperty, forEach, undef;
-
-		// Detect the `define` function exposed by asynchronous module loaders. The
-		// strict `define` check is necessary for compatibility with `r.js`.
-		var isLoader = typeof define === "function" && define.amd;
-
-		// Detect native implementations.
-		var nativeJSON = typeof JSON == "object" && JSON;
-
-		// Set up the JSON 3 namespace, preferring the CommonJS `exports` object if
-		// available.
-		var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports;
-
-		if (JSON3 && nativeJSON) {
-			// Explicitly delegate to the native `stringify` and `parse`
-			// implementations in CommonJS environments.
-			JSON3.stringify = nativeJSON.stringify;
-			JSON3.parse = nativeJSON.parse;
-		} else {
-			// Export for web browsers, JavaScript engines, and asynchronous module
-			// loaders, using the global `JSON` object if available.
-			JSON3 = window.JSON = nativeJSON || {};
-		}
-
-		// Test the `Date#getUTC*` methods. Based on work by @Yaffle.
-		var isExtended = new Date(-3509827334573292);
-		try {
-			// The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
-			// results for certain dates in Opera >= 10.53.
-			isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
-				// Safari < 2.0.2 stores the internal millisecond time value correctly,
-				// but clips the values returned by the date methods to the range of
-				// signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
-				isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
-		} catch (exception) {}
-
-		// Internal: Determines whether the native `JSON.stringify` and `parse`
-		// implementations are spec-compliant. Based on work by Ken Snyder.
-		function has(name) {
-			if (has[name] !== undef) {
-				// Return cached feature test result.
-				return has[name];
-			}
-
-			var isSupported;
-			if (name == "bug-string-char-index") {
-				// IE <= 7 doesn't support accessing string characters using square
-				// bracket notation. IE 8 only supports this for primitives.
-				isSupported = "a"[0] != "a";
-			} else if (name == "json") {
-				// Indicates whether both `JSON.stringify` and `JSON.parse` are
-				// supported.
-				isSupported = has("json-stringify") && has("json-parse");
-			} else {
-				var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
-				// Test `JSON.stringify`.
-				if (name == "json-stringify") {
-					var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
-					if (stringifySupported) {
-						// A test function object with a custom `toJSON` method.
-						(value = function () {
-							return 1;
-						}).toJSON = value;
-						try {
-							stringifySupported =
-								// Firefox 3.1b1 and b2 serialize string, number, and boolean
-								// primitives as object literals.
-								stringify(0) === "0" &&
-								// FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
-								// literals.
-								stringify(new Number()) === "0" &&
-								stringify(new String()) == '""' &&
-								// FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
-								// does not define a canonical JSON representation (this applies to
-								// objects with `toJSON` properties as well, *unless* they are nested
-								// within an object or array).
-								stringify(getClass) === undef &&
-								// IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
-								// FF 3.1b3 pass this test.
-								stringify(undef) === undef &&
-								// Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
-								// respectively, if the value is omitted entirely.
-								stringify() === undef &&
-								// FF 3.1b1, 2 throw an error if the given value is not a number,
-								// string, array, object, Boolean, or `null` literal. This applies to
-								// objects with custom `toJSON` methods as well, unless they are nested
-								// inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
-								// methods entirely.
-								stringify(value) === "1" &&
-								stringify([value]) == "[1]" &&
-								// Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
-								// `"[null]"`.
-								stringify([undef]) == "[null]" &&
-								// YUI 3.0.0b1 fails to serialize `null` literals.
-								stringify(null) == "null" &&
-								// FF 3.1b1, 2 halts serialization if an array contains a function:
-								// `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
-								// elides non-JSON values from objects and arrays, unless they
-								// define custom `toJSON` methods.
-								stringify([undef, getClass, null]) == "[null,null,null]" &&
-								// Simple serialization test. FF 3.1b1 uses Unicode escape sequences
-								// where character escape codes are expected (e.g., `\b` => `\u0008`).
-								stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
-								// FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
-								stringify(null, value) === "1" &&
-								stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
-								// JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
-								// serialize extended years.
-								stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
-								// The milliseconds are optional in ES 5, but required in 5.1.
-								stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
-								// Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
-								// four-digit years instead of six-digit years. Credits: @Yaffle.
-								stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
-								// Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
-								// values less than 1000. Credits: @Yaffle.
-								stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
-						} catch (exception) {
-							stringifySupported = false;
-						}
-					}
-					isSupported = stringifySupported;
-				}
-				// Test `JSON.parse`.
-				if (name == "json-parse") {
-					var parse = JSON3.parse;
-					if (typeof parse == "function") {
-						try {
-							// FF 3.1b1, b2 will throw an exception if a bare literal is provided.
-							// Conforming implementations should also coerce the initial argument to
-							// a string prior to parsing.
-							if (parse("0") === 0 && !parse(false)) {
-								// Simple parsing test.
-								value = parse(serialized);
-								var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
-								if (parseSupported) {
-									try {
-										// Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
-										parseSupported = !parse('"\t"');
-									} catch (exception) {}
-									if (parseSupported) {
-										try {
-											// FF 4.0 and 4.0.1 allow leading `+` signs and leading
-											// decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
-											// certain octal literals.
-											parseSupported = parse("01") !== 1;
-										} catch (exception) {}
-									}
-									if (parseSupported) {
-										try {
-											// FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
-											// points. These environments, along with FF 3.1b1 and 2,
-											// also allow trailing commas in JSON objects and arrays.
-											parseSupported = parse("1.") !== 1;
-										} catch (exception) {}
-									}
-								}
-							}
-						} catch (exception) {
-							parseSupported = false;
-						}
-					}
-					isSupported = parseSupported;
-				}
-			}
-			return has[name] = !!isSupported;
-		}
-
-		if (!has("json")) {
-			// Common `[[Class]]` name aliases.
-			var functionClass = "[object Function]";
-			var dateClass = "[object Date]";
-			var numberClass = "[object Number]";
-			var stringClass = "[object String]";
-			var arrayClass = "[object Array]";
-			var booleanClass = "[object Boolean]";
-
-			// Detect incomplete support for accessing string characters by index.
-			var charIndexBuggy = has("bug-string-char-index");
-
-			// Define additional utility methods if the `Date` methods are buggy.
-			if (!isExtended) {
-				var floor = Math.floor;
-				// A mapping between the months of the year and the number of days between
-				// January 1st and the first of the respective month.
-				var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
-				// Internal: Calculates the number of days between the Unix epoch and the
-				// first day of the given month.
-				var getDay = function (year, month) {
-					return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
-				};
-			}
-
-			// Internal: Determines if a property is a direct property of the given
-			// object. Delegates to the native `Object#hasOwnProperty` method.
-			if (!(isProperty = {}.hasOwnProperty)) {
-				isProperty = function (property) {
-					var members = {}, constructor;
-					if ((members.__proto__ = null, members.__proto__ = {
-							// The *proto* property cannot be set multiple times in recent
-							// versions of Firefox and SeaMonkey.
-							"toString": 1
-						}, members).toString != getClass) {
-						// Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
-						// supports the mutable *proto* property.
-						isProperty = function (property) {
-							// Capture and break the object's prototype chain (see section 8.6.2
-							// of the ES 5.1 spec). The parenthesized expression prevents an
-							// unsafe transformation by the Closure Compiler.
-							var original = this.__proto__, result = property in (this.__proto__ = null, this);
-							// Restore the original prototype chain.
-							this.__proto__ = original;
-							return result;
-						};
-					} else {
-						// Capture a reference to the top-level `Object` constructor.
-						constructor = members.constructor;
-						// Use the `constructor` property to simulate `Object#hasOwnProperty` in
-						// other environments.
-						isProperty = function (property) {
-							var parent = (this.constructor || constructor).prototype;
-							return property in this && !(property in parent && this[property] === parent[property]);
-						};
-					}
-					members = null;
-					return isProperty.call(this, property);
-				};
-			}
-
-			// Internal: A set of primitive types used by `isHostType`.
-			var PrimitiveTypes = {
-				'boolean': 1,
-				'number': 1,
-				'string': 1,
-				'undefined': 1
-			};
-
-			// Internal: Determines if the given object `property` value is a
-			// non-primitive.
-			var isHostType = function (object, property) {
-				var type = typeof object[property];
-				return type == 'object' ? !!object[property] : !PrimitiveTypes[type];
-			};
-
-			// Internal: Normalizes the `for...in` iteration algorithm across
-			// environments. Each enumerated key is yielded to a `callback` function.
-			forEach = function (object, callback) {
-				var size = 0, Properties, members, property;
-
-				// Tests for bugs in the current environment's `for...in` algorithm. The
-				// `valueOf` property inherits the non-enumerable flag from
-				// `Object.prototype` in older versions of IE, Netscape, and Mozilla.
-				(Properties = function () {
-					this.valueOf = 0;
-				}).prototype.valueOf = 0;
-
-				// Iterate over a new instance of the `Properties` class.
-				members = new Properties();
-				for (property in members) {
-					// Ignore all properties inherited from `Object.prototype`.
-					if (isProperty.call(members, property)) {
-						size++;
-					}
-				}
-				Properties = members = null;
-
-				// Normalize the iteration algorithm.
-				if (!size) {
-					// A list of non-enumerable properties inherited from `Object.prototype`.
-					members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
-					// IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
-					// properties.
-					forEach = function (object, callback) {
-						var isFunction = getClass.call(object) == functionClass, property, length;
-						var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty;
-						for (property in object) {
-							// Gecko <= 1.0 enumerates the `prototype` property of functions under
-							// certain conditions; IE does not.
-							if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
-								callback(property);
-							}
-						}
-						// Manually invoke the callback for each non-enumerable property.
-						for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
-					};
-				} else if (size == 2) {
-					// Safari <= 2.0.4 enumerates shadowed properties twice.
-					forEach = function (object, callback) {
-						// Create a set of iterated properties.
-						var members = {}, isFunction = getClass.call(object) == functionClass, property;
-						for (property in object) {
-							// Store each property name to prevent double enumeration. The
-							// `prototype` property of functions is not enumerated due to cross-
-							// environment inconsistencies.
-							if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
-								callback(property);
-							}
-						}
-					};
-				} else {
-					// No bugs detected; use the standard `for...in` algorithm.
-					forEach = function (object, callback) {
-						var isFunction = getClass.call(object) == functionClass, property, isConstructor;
-						for (property in object) {
-							if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
-								callback(property);
-							}
-						}
-						// Manually invoke the callback for the `constructor` property due to
-						// cross-environment inconsistencies.
-						if (isConstructor || isProperty.call(object, (property = "constructor"))) {
-							callback(property);
-						}
-					};
-				}
-				return forEach(object, callback);
-			};
-
-			// Public: Serializes a JavaScript `value` as a JSON string. The optional
-			// `filter` argument may specify either a function that alters how object and
-			// array members are serialized, or an array of strings and numbers that
-			// indicates which properties should be serialized. The optional `width`
-			// argument may be either a string or number that specifies the indentation
-			// level of the output.
-			if (!has("json-stringify")) {
-				// Internal: A map of control characters and their escaped equivalents.
-				var Escapes = {
-					92: "\\\\",
-					34: '\\"',
-					8: "\\b",
-					12: "\\f",
-					10: "\\n",
-					13: "\\r",
-					9: "\\t"
-				};
-
-				// Internal: Converts `value` into a zero-padded string such that its
-				// length is at least equal to `width`. The `width` must be <= 6.
-				var leadingZeroes = "000000";
-				var toPaddedString = function (width, value) {
-					// The `|| 0` expression is necessary to work around a bug in
-					// Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
-					return (leadingZeroes + (value || 0)).slice(-width);
-				};
-
-				// Internal: Double-quotes a string `value`, replacing all ASCII control
-				// characters (characters with code unit values between 0 and 31) with
-				// their escaped equivalents. This is an implementation of the
-				// `Quote(value)` operation defined in ES 5.1 section 15.12.3.
-				var unicodePrefix = "\\u00";
-				var quote = function (value) {
-					var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
-					if (isLarge) {
-						symbols = value.split("");
-					}
-					for (; index < length; index++) {
-						var charCode = value.charCodeAt(index);
-						// If the character is a control character, append its Unicode or
-						// shorthand escape sequence; otherwise, append the character as-is.
-						switch (charCode) {
-							case 8: case 9: case 10: case 12: case 13: case 34: case 92:
-							result += Escapes[charCode];
-							break;
-							default:
-								if (charCode < 32) {
-									result += unicodePrefix + toPaddedString(2, charCode.toString(16));
-									break;
-								}
-								result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
-						}
-					}
-					return result + '"';
-				};
-
-				// Internal: Recursively serializes an object. Implements the
-				// `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
-				var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
-					var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
-					try {
-						// Necessary for host object support.
-						value = object[property];
-					} catch (exception) {}
-					if (typeof value == "object" && value) {
-						className = getClass.call(value);
-						if (className == dateClass && !isProperty.call(value, "toJSON")) {
-							if (value > -1 / 0 && value < 1 / 0) {
-								// Dates are serialized according to the `Date#toJSON` method
-								// specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
-								// for the ISO 8601 date time string format.
-								if (getDay) {
-									// Manually compute the year, month, date, hours, minutes,
-									// seconds, and milliseconds if the `getUTC*` methods are
-									// buggy. Adapted from @Yaffle's `date-shim` project.
-									date = floor(value / 864e5);
-									for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
-									for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
-									date = 1 + date - getDay(year, month);
-									// The `time` value specifies the time within the day (see ES
-									// 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
-									// to compute `A modulo B`, as the `%` operator does not
-									// correspond to the `modulo` operation for negative numbers.
-									time = (value % 864e5 + 864e5) % 864e5;
-									// The hours, minutes, seconds, and milliseconds are obtained by
-									// decomposing the time within the day. See section 15.9.1.10.
-									hours = floor(time / 36e5) % 24;
-									minutes = floor(time / 6e4) % 60;
-									seconds = floor(time / 1e3) % 60;
-									milliseconds = time % 1e3;
-								} else {
-									year = value.getUTCFullYear();
-									month = value.getUTCMonth();
-									date = value.getUTCDate();
-									hours = value.getUTCHours();
-									minutes = value.getUTCMinutes();
-									seconds = value.getUTCSeconds();
-									milliseconds = value.getUTCMilliseconds();
-								}
-								// Serialize extended years correctly.
-								value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
-									"-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
-									// Months, dates, hours, minutes, and seconds should have two
-									// digits; milliseconds should have three.
-									"T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
-									// Milliseconds are optional in ES 5.0, but required in 5.1.
-									"." + toPaddedString(3, milliseconds) + "Z";
-							} else {
-								value = null;
-							}
-						} else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
-							// Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
-							// `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
-							// ignores all `toJSON` methods on these objects unless they are
-							// defined directly on an instance.
-							value = value.toJSON(property);
-						}
-					}
-					if (callback) {
-						// If a replacement function was provided, call it to obtain the value
-						// for serialization.
-						value = callback.call(object, property, value);
-					}
-					if (value === null) {
-						return "null";
-					}
-					className = getClass.call(value);
-					if (className == booleanClass) {
-						// Booleans are represented literally.
-						return "" + value;
-					} else if (className == numberClass) {
-						// JSON numbers must be finite. `Infinity` and `NaN` are serialized as
-						// `"null"`.
-						return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
-					} else if (className == stringClass) {
-						// Strings are double-quoted and escaped.
-						return quote("" + value);
-					}
-					// Recursively serialize objects and arrays.
-					if (typeof value == "object") {
-						// Check for cyclic structures. This is a linear search; performance
-						// is inversely proportional to the number of unique nested objects.
-						for (length = stack.length; length--;) {
-							if (stack[length] === value) {
-								// Cyclic structures cannot be serialized by `JSON.stringify`.
-								throw TypeError();
-							}
-						}
-						// Add the object to the stack of traversed objects.
-						stack.push(value);
-						results = [];
-						// Save the current indentation level and indent one additional level.
-						prefix = indentation;
-						indentation += whitespace;
-						if (className == arrayClass) {
-							// Recursively serialize array elements.
-							for (index = 0, length = value.length; index < length; index++) {
-								element = serialize(index, value, callback, properties, whitespace, indentation, stack);
-								results.push(element === undef ? "null" : element);
-							}
-							result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
-						} else {
-							// Recursively serialize object members. Members are selected from
-							// either a user-specified list of property names, or the object
-							// itself.
-							forEach(properties || value, function (property) {
-								var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
-								if (element !== undef) {
-									// According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
-									// is not the empty string, let `member` {quote(property) + ":"}
-									// be the concatenation of `member` and the `space` character."
-									// The "`space` character" refers to the literal space
-									// character, not the `space` {width} argument provided to
-									// `JSON.stringify`.
-									results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
-								}
-							});
-							result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
-						}
-						// Remove the object from the traversed object stack.
-						stack.pop();
-						return result;
-					}
-				};
-
-				// Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
-				JSON3.stringify = function (source, filter, width) {
-					var whitespace, callback, properties, className;
-					if (typeof filter == "function" || typeof filter == "object" && filter) {
-						if ((className = getClass.call(filter)) == functionClass) {
-							callback = filter;
-						} else if (className == arrayClass) {
-							// Convert the property names array into a makeshift set.
-							properties = {};
-							for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
-						}
-					}
-					if (width) {
-						if ((className = getClass.call(width)) == numberClass) {
-							// Convert the `width` to an integer and create a string containing
-							// `width` number of space characters.
-							if ((width -= width % 1) > 0) {
-								for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
-							}
-						} else if (className == stringClass) {
-							whitespace = width.length <= 10 ? width : width.slice(0, 10);
-						}
-					}
-					// Opera <= 7.54u2 discards the values associated with empty string keys
-					// (`""`) only if they are used directly within an object member list
-					// (e.g., `!("" in { "": 1})`).
-					return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
-				};
-			}
-
-			// Public: Parses a JSON source string.
-			if (!has("json-parse")) {
-				var fromCharCode = String.fromCharCode;
-
-				// Internal: A map of escaped control characters and their unescaped
-				// equivalents.
-				var Unescapes = {
-					92: "\\",
-					34: '"',
-					47: "/",
-					98: "\b",
-					116: "\t",
-					110: "\n",
-					102: "\f",
-					114: "\r"
-				};
-
-				// Internal: Stores the parser state.
-				var Index, Source;
-
-				// Internal: Resets the parser state and throws a `SyntaxError`.
-				var abort = function() {
-					Index = Source = null;
-					throw SyntaxError();
-				};
-
-				// Internal: Returns the next token, or `"$"` if the parser has reached
-				// the end of the source string. A token may be a string, number, `null`
-				// literal, or Boolean literal.
-				var lex = function () {
-					var source = Source, length = source.length, value, begin, position, isSigned, charCode;
-					while (Index < length) {
-						charCode = source.charCodeAt(Index);
-						switch (charCode) {
-							case 9: case 10: case 13: case 32:
-							// Skip whitespace tokens, including tabs, carriage returns, line
-							// feeds, and space characters.
-							Index++;
-							break;
-							case 123: case 125: case 91: case 93: case 58: case 44:
-							// Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
-							// the current position.
-							value = charIndexBuggy ? source.charAt(Index) : source[Index];
-							Index++;
-							return value;
-							case 34:
-								// `"` delimits a JSON string; advance to the next character and
-								// begin parsing the string. String tokens are prefixed with the
-								// sentinel `@` character to distinguish them from punctuators and
-								// end-of-string tokens.
-								for (value = "@", Index++; Index < length;) {
-									charCode = source.charCodeAt(Index);
-									if (charCode < 32) {
-										// Unescaped ASCII control characters (those with a code unit
-										// less than the space character) are not permitted.
-										abort();
-									} else if (charCode == 92) {
-										// A reverse solidus (`\`) marks the beginning of an escaped
-										// control character (including `"`, `\`, and `/`) or Unicode
-										// escape sequence.
-										charCode = source.charCodeAt(++Index);
-										switch (charCode) {
-											case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
-											// Revive escaped control characters.
-											value += Unescapes[charCode];
-											Index++;
-											break;
-											case 117:
-												// `\u` marks the beginning of a Unicode escape sequence.
-												// Advance to the first character and validate the
-												// four-digit code point.
-												begin = ++Index;
-												for (position = Index + 4; Index < position; Index++) {
-													charCode = source.charCodeAt(Index);
-													// A valid sequence comprises four hexdigits (case-
-													// insensitive) that form a single hexadecimal value.
-													if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
-														// Invalid Unicode escape sequence.
-														abort();
-													}
-												}
-												// Revive the escaped character.
-												value += fromCharCode("0x" + source.slice(begin, Index));
-												break;
-											default:
-												// Invalid escape sequence.
-												abort();
-										}
-									} else {
-										if (charCode == 34) {
-											// An unescaped double-quote character marks the end of the
-											// string.
-											break;
-										}
-										charCode = source.charCodeAt(Index);
-										begin = Index;
-										// Optimize for the common case where a string is valid.
-										while (charCode >= 32 && charCode != 92 && charCode != 34) {
-											charCode = source.charCodeAt(++Index);
-										}
-										// Append the string as-is.
-										value += source.slice(begin, Index);
-									}
-								}
-								if (source.charCodeAt(Index) == 34) {
-									// Advance to the next character and return the revived string.
-									Index++;
-									return value;
-								}
-								// Unterminated string.
-								abort();
-							default:
-								// Parse numbers and literals.
-								begin = Index;
-								// Advance past the negative sign, if one is specified.
-								if (charCode == 45) {
-									isSigned = true;
-									charCode = source.charCodeAt(++Index);
-								}
-								// Parse an integer or floating-point value.
-								if (charCode >= 48 && charCode <= 57) {
-									// Leading zeroes are interpreted as octal literals.
-									if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
-										// Illegal octal literal.
-										abort();
-									}
-									isSigned = false;
-									// Parse the integer component.
-									for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
-									// Floats cannot contain a leading decimal point; however, this
-									// case is already accounted for by the parser.
-									if (source.charCodeAt(Index) == 46) {
-										position = ++Index;
-										// Parse the decimal component.
-										for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
-										if (position == Index) {
-											// Illegal trailing decimal.
-											abort();
-										}
-										Index = position;
-									}
-									// Parse exponents. The `e` denoting the exponent is
-									// case-insensitive.
-									charCode = source.charCodeAt(Index);
-									if (charCode == 101 || charCode == 69) {
-										charCode = source.charCodeAt(++Index);
-										// Skip past the sign following the exponent, if one is
-										// specified.
-										if (charCode == 43 || charCode == 45) {
-											Index++;
-										}
-										// Parse the exponential component.
-										for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
-										if (position == Index) {
-											// Illegal empty exponent.
-											abort();
-										}
-										Index = position;
-									}
-									// Coerce the parsed value to a JavaScript number.
-									return +source.slice(begin, Index);
-								}
-								// A negative sign may only precede numbers.
-								if (isSigned) {
-									abort();
-								}
-								// `true`, `false`, and `null` literals.
-								if (source.slice(Index, Index + 4) == "true") {
-									Index += 4;
-									return true;
-								} else if (source.slice(Index, Index + 5) == "false") {
-									Index += 5;
-									return false;
-								} else if (source.slice(Index, Index + 4) == "null") {
-									Index += 4;
-									return null;
-								}
-								// Unrecognized token.
-								abort();
-						}
-					}
-					// Return the sentinel `$` character if the parser has reached the end
-					// of the source string.
-					return "$";
-				};
-
-				// Internal: Parses a JSON `value` token.
-				var get = function (value) {
-					var results, hasMembers;
-					if (value == "$") {
-						// Unexpected end of input.
-						abort();
-					}
-					if (typeof value == "string") {
-						if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
-							// Remove the sentinel `@` character.
-							return value.slice(1);
-						}
-						// Parse object and array literals.
-						if (value == "[") {
-							// Parses a JSON array, returning a new JavaScript array.
-							results = [];
-							for (;; hasMembers || (hasMembers = true)) {
-								value = lex();
-								// A closing square bracket marks the end of the array literal.
-								if (value == "]") {
-									break;
-								}
-								// If the array literal contains elements, the current token
-								// should be a comma separating the previous element from the
-								// next.
-								if (hasMembers) {
-									if (value == ",") {
-										value = lex();
-										if (value == "]") {
-											// Unexpected trailing `,` in array literal.
-											abort();
-										}
-									} else {
-										// A `,` must separate each array element.
-										abort();
-									}
-								}
-								// Elisions and leading commas are not permitted.
-								if (value == ",") {
-									abort();
-								}
-								results.push(get(value));
-							}
-							return results;
-						} else if (value == "{") {
-							// Parses a JSON object, returning a new JavaScript object.
-							results = {};
-							for (;; hasMembers || (hasMembers = true)) {
-								value = lex();
-								// A closing curly brace marks the end of the object literal.
-								if (value == "}") {
-									break;
-								}
-								// If the object literal contains members, the current token
-								// should be a comma separator.
-								if (hasMembers) {
-									if (value == ",") {
-										value = lex();
-										if (value == "}") {
-											// Unexpected trailing `,` in object literal.
-											abort();
-										}
-									} else {
-										// A `,` must separate each object member.
-										abort();
-									}
-								}
-								// Leading commas are not permitted, object property names must be
-								// double-quoted strings, and a `:` must separate each property
-								// name and value.
-								if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
-									abort();
-								}
-								results[value.slice(1)] = get(lex());
-							}
-							return results;
-						}
-						// Unexpected token encountered.
-						abort();
-					}
-					return value;
-				};
-
-				// Internal: Updates a traversed object member.
-				var update = function(source, property, callback) {
-					var element = walk(source, property, callback);
-					if (element === undef) {
-						delete source[property];
-					} else {
-						source[property] = element;
-					}
-				};
-
-				// Internal: Recursively traverses a parsed JSON object, invoking the
-				// `callback` function for each value. This is an implementation of the
-				// `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
-				var walk = function (source, property, callback) {
-					var value = source[property], length;
-					if (typeof value == "object" && value) {
-						// `forEach` can't be used to traverse an array in Opera <= 8.54
-						// because its `Object#hasOwnProperty` implementation returns `false`
-						// for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
-						if (getClass.call(value) == arrayClass) {
-							for (length = value.length; length--;) {
-								update(value, length, callback);
-							}
-						} else {
-							forEach(value, function (property) {
-								update(value, property, callback);
-							});
-						}
-					}
-					return callback.call(source, property, value);
-				};
-
-				// Public: `JSON.parse`. See ES 5.1 section 15.12.2.
-				JSON3.parse = function (source, callback) {
-					var result, value;
-					Index = 0;
-					Source = "" + source;
-					result = get(lex());
-					// If a JSON string contains multiple tokens, it is invalid.
-					if (lex() != "$") {
-						abort();
-					}
-					// Reset the parser state.
-					Index = Source = null;
-					return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
-				};
-			}
-		}
-
-		// Export for asynchronous module loaders.
-		if (isLoader) {
-			define(function () {
-				return JSON3;
-			});
-		}
-	}(this));
-
-},{}],46:[function(require,module,exports){
-	var util = require('util');
-	var hark = require('hark');
-	var webrtcSupport = require('webrtcsupport');
-	var getUserMedia = require('getusermedia');
-	var getScreenMedia = require('getscreenmedia');
-	var WildEmitter = require('wildemitter');
-	var GainController = require('mediastream-gain');
-	var mockconsole = require('mockconsole');
-
-
-	function isAllTracksEnded(stream) {
-		var isAllTracksEnded = true;
-		stream.getTracks().forEach(function (t) {
-			isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
-		});
-		return isAllTracksEnded;
-	}
-
-	function LocalMedia(opts) {
-		WildEmitter.call(this);
-
-		var config = this.config = {
-			autoAdjustMic: false,
-			detectSpeakingEvents: false,
-			audioFallback: false,
-			media: {
-				audio: true,
-				video: true
-			},
-			logger: mockconsole
-		};
-
-		var item;
-		for (item in opts) {
-			if (opts.hasOwnProperty(item)) {
-				this.config[item] = opts[item];
-			}
-		}
-
-		this.logger = config.logger;
-		this._log = this.logger.log.bind(this.logger, 'LocalMedia:');
-		this._logerror = this.logger.error.bind(this.logger, 'LocalMedia:');
-
-		this.screenSharingSupport = webrtcSupport.supportScreenSharing;
-
-		this.localStreams = [];
-		this.localScreens = [];
-
-		if (!webrtcSupport.supportGetUserMedia) {
-			this._logerror('Your browser does not support local media capture.');
-		}
-	}
-
-	util.inherits(LocalMedia, WildEmitter);
-
-
-	LocalMedia.prototype.start = function (mediaConstraints, cb) {
-		var self = this;
-		var constraints = mediaConstraints || this.config.media;
-
-		getUserMedia(constraints, function (err, stream) {
-
-			if (!err) {
-				if (constraints.audio && self.config.detectSpeakingEvents) {
-					self.setupAudioMonitor(stream, self.config.harkOptions);
-				}
-				self.localStreams.push(stream);
-
-				if (self.config.autoAdjustMic) {
-					self.gainController = new GainController(stream);
-					// start out somewhat muted if we can track audio
-					self.setMicIfEnabled(0.5);
-				}
-
-				stream.getTracks().forEach(function (track) {
-					track.addEventListener('ended', function () {
-						if (isAllTracksEnded(stream)) {
-							self.emit('localStreamStopped', stream);
-						}
-					});
-				});
-
-				self.emit('localStream', stream);
-			} else {
-				// Fallback for users without a camera
-				if (self.config.audioFallback && (err.name === 'DevicesNotFoundError' || err.name === 'NotFoundError') && constraints.video !== false) {
-					constraints.video = false;
-					self.start(constraints, cb);
-					return;
-				}
-			}
-			if (cb) {
-				return cb(err, stream);
-			}
-		});
-	};
-
-	LocalMedia.prototype.stop = function (stream) {
-		// FIXME: duplicates cleanup code until fixed in FF
-		if (stream) {
-			stream.getTracks().forEach(function (track) { track.stop(); });
-			var idx = this.localStreams.indexOf(stream);
-			if (idx > -1) {
-				this.localStreams.splice(idx, 1);
-				if (webrtcSupport.prefix === 'moz') {
-					this.emit('localStreamStopped', stream);
-				}
-			} else {
-				idx = this.localScreens.indexOf(stream);
-				if (idx > -1) {
-					this.localScreens.splice(idx, 1);
-					if (webrtcSupport.prefix === 'moz') {
-						this.emit('localScreenStopped', stream);
-					}
-				}
-			}
-		} else {
-			this.stopStreams();
-			this.stopScreenShare();
-		}
-	};
-
-	LocalMedia.prototype.stopStreams = function () {
-		var self = this;
-		if (this.audioMonitor) {
-			this.audioMonitor.stop();
-			delete this.audioMonitor;
-		}
-		var oldLocalStream = this.localStreams;
-		this.localStreams = [];
-
-		oldLocalStream.forEach(function (stream) {
-			stream.getTracks().forEach(function (track) { track.stop(); });
-			if (webrtcSupport.prefix === 'moz') {
-				self.emit('localStreamStopped', stream);
-			}
-		});
-	};
-
-	LocalMedia.prototype.startScreenShare = function (mode, cb) {
-		var self = this;
-		getScreenMedia(mode, function (err, stream) {
-			if (!err) {
-				self.localScreens.push(stream);
-
-				stream.getTracks().forEach(function (track) {
-					track.addEventListener('ended', function () {
-						if (isAllTracksEnded(stream)) {
-							self.emit('localScreenStopped', stream);
-						}
-					});
-				});
-
-				self.emit('localScreen', stream);
-			}
-
-			// enable the callback
-			if (cb) {
-				return cb(err, stream);
-			}
-		});
-	};
-
-	LocalMedia.prototype.stopScreenShare = function (stream) {
-		var self = this;
-		if (stream) {
-			stream.getTracks().forEach(function (track) { track.stop(); });
-			var idx = this.localScreens.indexOf(stream);
-			if (idx > -1) {
-				this.localScreens.splice(idx, 1);
-				if (webrtcSupport.prefix === 'moz') {
-					this.emit('localScreenStopped', stream);
-				}
-			}
-		} else {
-			var oldLocalScreens = this.localScreens;
-			this.localScreens = [];
-
-			oldLocalScreens.forEach(function (stream) {
-				stream.getTracks().forEach(function (track) { track.stop(); });
-				if (webrtcSupport.prefix === 'moz') {
-					self.emit('localScreenStopped', stream);
-				}
-			});
-		}
-	};
-
-// Audio controls
-	LocalMedia.prototype.mute = function () {
-		this._audioEnabled(false);
-		this.hardMuted = true;
-		this.emit('audioOff');
-	};
-
-	LocalMedia.prototype.unmute = function () {
-		this._audioEnabled(true);
-		this.hardMuted = false;
-		this.emit('audioOn');
-	};
-
-	LocalMedia.prototype.setupAudioMonitor = function (stream, harkOptions) {
-		this._log('Setup audio');
-		var audio = this.audioMonitor = hark(stream, harkOptions);
-		var self = this;
-		var timeout;
-
-		audio.on('speaking', function () {
-			self.emit('speaking');
-			if (self.hardMuted) {
-				return;
-			}
-			self.setMicIfEnabled(1);
-		});
-
-		audio.on('stopped_speaking', function () {
-			if (timeout) {
-				clearTimeout(timeout);
-			}
-
-			timeout = setTimeout(function () {
-				self.emit('stoppedSpeaking');
-				if (self.hardMuted) {
-					return;
-				}
-				self.setMicIfEnabled(0.5);
-			}, 1000);
-		});
-		audio.on('volume_change', function (volume, treshold) {
-			self.emit('volumeChange', volume, treshold);
-		});
-	};
-
-// We do this as a seperate method in order to
-// still leave the "setMicVolume" as a working
-// method.
-	LocalMedia.prototype.setMicIfEnabled = function (volume) {
-		if (!this.config.autoAdjustMic) {
-			return;
-		}
-		this.gainController.setGain(volume);
-	};
-
-// Video controls
-	LocalMedia.prototype.pauseVideo = function () {
-		this._videoEnabled(false);
-		this.emit('videoOff');
-	};
-	LocalMedia.prototype.resumeVideo = function () {
-		this._videoEnabled(true);
-		this.emit('videoOn');
-	};
-
-// Combined controls
-	LocalMedia.prototype.pause = function () {
-		this.mute();
-		this.pauseVideo();
-	};
-	LocalMedia.prototype.resume = function () {
-		this.unmute();
-		this.resumeVideo();
-	};
-
-// Internal methods for enabling/disabling audio/video
-	LocalMedia.prototype._audioEnabled = function (bool) {
-		// work around for chrome 27 bug where disabling tracks
-		// doesn't seem to work (works in canary, remove when working)
-		this.setMicIfEnabled(bool ? 1 : 0);
-		this.localStreams.forEach(function (stream) {
-			stream.getAudioTracks().forEach(function (track) {
-				track.enabled = !!bool;
-			});
-		});
-	};
-	LocalMedia.prototype._videoEnabled = function (bool) {
-		this.localStreams.forEach(function (stream) {
-			stream.getVideoTracks().forEach(function (track) {
-				track.enabled = !!bool;
-			});
-		});
-	};
-
-// check if all audio streams are enabled
-	LocalMedia.prototype.isAudioEnabled = function () {
-		var enabled = true;
-		var hasAudioTracks = false;
-		this.localStreams.forEach(function (stream) {
-			var audioTracks = stream.getAudioTracks();
-			if (audioTracks.length > 0) {
-				hasAudioTracks = true;
-				audioTracks.forEach(function (track) {
-					enabled = enabled && track.enabled;
-				});
-			}
-		});
-
-		// If no audioTracks were found, that means there is no microphone device.
-		// In that case, isAudioEnabled should return false.
-		if (!hasAudioTracks) {
-			return false;
-		}
-
-		return enabled;
-	};
-
-// check if all video streams are enabled
-	LocalMedia.prototype.isVideoEnabled = function () {
-		var enabled = true;
-		var hasVideoTracks = false;
-		this.localStreams.forEach(function (stream) {
-			var videoTracks = stream.getVideoTracks();
-			if (videoTracks.length > 0) {
-				hasVideoTracks = true;
-				videoTracks.forEach(function (track) {
-					enabled = enabled && track.enabled;
-				});
-			}
-		});
-
-		// If no videoTracks were found, that means there is no camera device.
-		// In that case, isVideoEnabled should return false.
-		if (!hasVideoTracks) {
-			return false;
-		}
-
-		return enabled;
-	};
-
-// Backwards Compat
-	LocalMedia.prototype.startLocalMedia = LocalMedia.prototype.start;
-	LocalMedia.prototype.stopLocalMedia = LocalMedia.prototype.stop;
-
-// fallback for old .localStream behaviour
-	Object.defineProperty(LocalMedia.prototype, 'localStream', {
-		get: function () {
-			return this.localStreams.length > 0 ? this.localStreams[0] : null;
-		}
-	});
-// fallback for old .localScreen behaviour
-	Object.defineProperty(LocalMedia.prototype, 'localScreen', {
-		get: function () {
-			return this.localScreens.length > 0 ? this.localScreens[0] : null;
-		}
-	});
-
-	module.exports = LocalMedia;
-
-},{"getscreenmedia":27,"getusermedia":29,"hark":40,"mediastream-gain":48,"mockconsole":50,"util":89,"webrtcsupport":99,"wildemitter":100}],47:[function(require,module,exports){
-	(function (global){
-		/**
-		 * lodash (Custom Build) <https://lodash.com/>
-		 * Build: `lodash modularize exports="npm" -o ./`
-		 * Copyright jQuery Foundation and other contributors <https://jquery.org/>
-		 * Released under MIT license <https://lodash.com/license>
-		 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
-		 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-		 */
-
-		/** Used as the size to enable large array optimizations. */
-		var LARGE_ARRAY_SIZE = 200;
-
-		/** Used to stand-in for `undefined` hash values. */
-		var HASH_UNDEFINED = '__lodash_hash_undefined__';
-
-		/** Used as references for various `Number` constants. */
-		var MAX_SAFE_INTEGER = 9007199254740991;
-
-		/** `Object#toString` result references. */
-		var argsTag = '[object Arguments]',
-			arrayTag = '[object Array]',
-			boolTag = '[object Boolean]',
-			dateTag = '[object Date]',
-			errorTag = '[object Error]',
-			funcTag = '[object Function]',
-			genTag = '[object GeneratorFunction]',
-			mapTag = '[object Map]',
-			numberTag = '[object Number]',
-			objectTag = '[object Object]',
-			promiseTag = '[object Promise]',
-			regexpTag = '[object RegExp]',
-			setTag = '[object Set]',
-			stringTag = '[object String]',
-			symbolTag = '[object Symbol]',
-			weakMapTag = '[object WeakMap]';
-
-		var arrayBufferTag = '[object ArrayBuffer]',
-			dataViewTag = '[object DataView]',
-			float32Tag = '[object Float32Array]',
-			float64Tag = '[object Float64Array]',
-			int8Tag = '[object Int8Array]',
-			int16Tag = '[object Int16Array]',
-			int32Tag = '[object Int32Array]',
-			uint8Tag = '[object Uint8Array]',
-			uint8ClampedTag = '[object Uint8ClampedArray]',
-			uint16Tag = '[object Uint16Array]',
-			uint32Tag = '[object Uint32Array]';
-
-		/**
-		 * Used to match `RegExp`
-		 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
-		 */
-		var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
-
-		/** Used to match `RegExp` flags from their coerced string values. */
-		var reFlags = /\w*$/;
-
-		/** Used to detect host constructors (Safari). */
-		var reIsHostCtor = /^\[object .+?Constructor\]$/;
-
-		/** Used to detect unsigned integer values. */
-		var reIsUint = /^(?:0|[1-9]\d*)$/;
-
-		/** Used to identify `toStringTag` values supported by `_.clone`. */
-		var cloneableTags = {};
-		cloneableTags[argsTag] = cloneableTags[arrayTag] =
-			cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
-				cloneableTags[boolTag] = cloneableTags[dateTag] =
-					cloneableTags[float32Tag] = cloneableTags[float64Tag] =
-						cloneableTags[int8Tag] = cloneableTags[int16Tag] =
-							cloneableTags[int32Tag] = cloneableTags[mapTag] =
-								cloneableTags[numberTag] = cloneableTags[objectTag] =
-									cloneableTags[regexpTag] = cloneableTags[setTag] =
-										cloneableTags[stringTag] = cloneableTags[symbolTag] =
-											cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
-												cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
-		cloneableTags[errorTag] = cloneableTags[funcTag] =
-			cloneableTags[weakMapTag] = false;
-
-		/** Detect free variable `global` from Node.js. */
-		var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
-
-		/** Detect free variable `self`. */
-		var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
-
-		/** Used as a reference to the global object. */
-		var root = freeGlobal || freeSelf || Function('return this')();
-
-		/** Detect free variable `exports`. */
-		var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
-
-		/** Detect free variable `module`. */
-		var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
-
-		/** Detect the popular CommonJS extension `module.exports`. */
-		var moduleExports = freeModule && freeModule.exports === freeExports;
-
-		/**
-		 * Adds the key-value `pair` to `map`.
-		 *
-		 * @private
-		 * @param {Object} map The map to modify.
-		 * @param {Array} pair The key-value pair to add.
-		 * @returns {Object} Returns `map`.
-		 */
-		function addMapEntry(map, pair) {
-			// Don't return `map.set` because it's not chainable in IE 11.
-			map.set(pair[0], pair[1]);
-			return map;
-		}
-
-		/**
-		 * Adds `value` to `set`.
-		 *
-		 * @private
-		 * @param {Object} set The set to modify.
-		 * @param {*} value The value to add.
-		 * @returns {Object} Returns `set`.
-		 */
-		function addSetEntry(set, value) {
-			// Don't return `set.add` because it's not chainable in IE 11.
-			set.add(value);
-			return set;
-		}
-
-		/**
-		 * A specialized version of `_.forEach` for arrays without support for
-		 * iteratee shorthands.
-		 *
-		 * @private
-		 * @param {Array} [array] The array to iterate over.
-		 * @param {Function} iteratee The function invoked per iteration.
-		 * @returns {Array} Returns `array`.
-		 */
-		function arrayEach(array, iteratee) {
-			var index = -1,
-				length = array ? array.length : 0;
-
-			while (++index < length) {
-				if (iteratee(array[index], index, array) === false) {
-					break;
-				}
-			}
-			return array;
-		}
-
-		/**
-		 * Appends the elements of `values` to `array`.
-		 *
-		 * @private
-		 * @param {Array} array The array to modify.
-		 * @param {Array} values The values to append.
-		 * @returns {Array} Returns `array`.
-		 */
-		function arrayPush(array, values) {
-			var index = -1,
-				length = values.length,
-				offset = array.length;
-
-			while (++index < length) {
-				array[offset + index] = values[index];
-			}
-			return array;
-		}
-
-		/**
-		 * A specialized version of `_.reduce` for arrays without support for
-		 * iteratee shorthands.
-		 *
-		 * @private
-		 * @param {Array} [array] The array to iterate over.
-		 * @param {Function} iteratee The function invoked per iteration.
-		 * @param {*} [accumulator] The initial value.
-		 * @param {boolean} [initAccum] Specify using the first element of `array` as
-		 *  the initial value.
-		 * @returns {*} Returns the accumulated value.
-		 */
-		function arrayReduce(array, iteratee, accumulator, initAccum) {
-			var index = -1,
-				length = array ? array.length : 0;
-
-			if (initAccum && length) {
-				accumulator = array[++index];
-			}
-			while (++index < length) {
-				accumulator = iteratee(accumulator, array[index], index, array);
-			}
-			return accumulator;
-		}
-
-		/**
-		 * The base implementation of `_.times` without support for iteratee shorthands
-		 * or max array length checks.
-		 *
-		 * @private
-		 * @param {number} n The number of times to invoke `iteratee`.
-		 * @param {Function} iteratee The function invoked per iteration.
-		 * @returns {Array} Returns the array of results.
-		 */
-		function baseTimes(n, iteratee) {
-			var index = -1,
-				result = Array(n);
-
-			while (++index < n) {
-				result[index] = iteratee(index);
-			}
-			return result;
-		}
-
-		/**
-		 * Gets the value at `key` of `object`.
-		 *
-		 * @private
-		 * @param {Object} [object] The object to query.
-		 * @param {string} key The key of the property to get.
-		 * @returns {*} Returns the property value.
-		 */
-		function getValue(object, key) {
-			return object == null ? undefined : object[key];
-		}
-
-		/**
-		 * Checks if `value` is a host object in IE < 9.
-		 *
-		 * @private
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
-		 */
-		function isHostObject(value) {
-			// Many host objects are `Object` objects that can coerce to strings
-			// despite having improperly defined `toString` methods.
-			var result = false;
-			if (value != null && typeof value.toString != 'function') {
-				try {
-					result = !!(value + '');
-				} catch (e) {}
-			}
-			return result;
-		}
-
-		/**
-		 * Converts `map` to its key-value pairs.
-		 *
-		 * @private
-		 * @param {Object} map The map to convert.
-		 * @returns {Array} Returns the key-value pairs.
-		 */
-		function mapToArray(map) {
-			var index = -1,
-				result = Array(map.size);
-
-			map.forEach(function(value, key) {
-				result[++index] = [key, value];
-			});
-			return result;
-		}
-
-		/**
-		 * Creates a unary function that invokes `func` with its argument transformed.
-		 *
-		 * @private
-		 * @param {Function} func The function to wrap.
-		 * @param {Function} transform The argument transform.
-		 * @returns {Function} Returns the new function.
-		 */
-		function overArg(func, transform) {
-			return function(arg) {
-				return func(transform(arg));
-			};
-		}
-
-		/**
-		 * Converts `set` to an array of its values.
-		 *
-		 * @private
-		 * @param {Object} set The set to convert.
-		 * @returns {Array} Returns the values.
-		 */
-		function setToArray(set) {
-			var index = -1,
-				result = Array(set.size);
-
-			set.forEach(function(value) {
-				result[++index] = value;
-			});
-			return result;
-		}
-
-		/** Used for built-in method references. */
-		var arrayProto = Array.prototype,
-			funcProto = Function.prototype,
-			objectProto = Object.prototype;
-
-		/** Used to detect overreaching core-js shims. */
-		var coreJsData = root['__core-js_shared__'];
-
-		/** Used to detect methods masquerading as native. */
-		var maskSrcKey = (function() {
-			var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
-			return uid ? ('Symbol(src)_1.' + uid) : '';
-		}());
-
-		/** Used to resolve the decompiled source of functions. */
-		var funcToString = funcProto.toString;
-
-		/** Used to check objects for own properties. */
-		var hasOwnProperty = objectProto.hasOwnProperty;
-
-		/**
-		 * Used to resolve the
-		 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-		 * of values.
-		 */
-		var objectToString = objectProto.toString;
-
-		/** Used to detect if a method is native. */
-		var reIsNative = RegExp('^' +
-			funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
-				.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
-		);
-
-		/** Built-in value references. */
-		var Buffer = moduleExports ? root.Buffer : undefined,
-			Symbol = root.Symbol,
-			Uint8Array = root.Uint8Array,
-			getPrototype = overArg(Object.getPrototypeOf, Object),
-			objectCreate = Object.create,
-			propertyIsEnumerable = objectProto.propertyIsEnumerable,
-			splice = arrayProto.splice;
-
-		/* Built-in method references for those with the same name as other `lodash` methods. */
-		var nativeGetSymbols = Object.getOwnPropertySymbols,
-			nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
-			nativeKeys = overArg(Object.keys, Object);
-
-		/* Built-in method references that are verified to be native. */
-		var DataView = getNative(root, 'DataView'),
-			Map = getNative(root, 'Map'),
-			Promise = getNative(root, 'Promise'),
-			Set = getNative(root, 'Set'),
-			WeakMap = getNative(root, 'WeakMap'),
-			nativeCreate = getNative(Object, 'create');
-
-		/** Used to detect maps, sets, and weakmaps. */
-		var dataViewCtorString = toSource(DataView),
-			mapCtorString = toSource(Map),
-			promiseCtorString = toSource(Promise),
-			setCtorString = toSource(Set),
-			weakMapCtorString = toSource(WeakMap);
-
-		/** Used to convert symbols to primitives and strings. */
-		var symbolProto = Symbol ? Symbol.prototype : undefined,
-			symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;
-
-		/**
-		 * Creates a hash object.
-		 *
-		 * @private
-		 * @constructor
-		 * @param {Array} [entries] The key-value pairs to cache.
-		 */
-		function Hash(entries) {
-			var index = -1,
-				length = entries ? entries.length : 0;
-
-			this.clear();
-			while (++index < length) {
-				var entry = entries[index];
-				this.set(entry[0], entry[1]);
-			}
-		}
-
-		/**
-		 * Removes all key-value entries from the hash.
-		 *
-		 * @private
-		 * @name clear
-		 * @memberOf Hash
-		 */
-		function hashClear() {
-			this.__data__ = nativeCreate ? nativeCreate(null) : {};
-		}
-
-		/**
-		 * Removes `key` and its value from the hash.
-		 *
-		 * @private
-		 * @name delete
-		 * @memberOf Hash
-		 * @param {Object} hash The hash to modify.
-		 * @param {string} key The key of the value to remove.
-		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
-		 */
-		function hashDelete(key) {
-			return this.has(key) && delete this.__data__[key];
-		}
-
-		/**
-		 * Gets the hash value for `key`.
-		 *
-		 * @private
-		 * @name get
-		 * @memberOf Hash
-		 * @param {string} key The key of the value to get.
-		 * @returns {*} Returns the entry value.
-		 */
-		function hashGet(key) {
-			var data = this.__data__;
-			if (nativeCreate) {
-				var result = data[key];
-				return result === HASH_UNDEFINED ? undefined : result;
-			}
-			return hasOwnProperty.call(data, key) ? data[key] : undefined;
-		}
-
-		/**
-		 * Checks if a hash value for `key` exists.
-		 *
-		 * @private
-		 * @name has
-		 * @memberOf Hash
-		 * @param {string} key The key of the entry to check.
-		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
-		 */
-		function hashHas(key) {
-			var data = this.__data__;
-			return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
-		}
-
-		/**
-		 * Sets the hash `key` to `value`.
-		 *
-		 * @private
-		 * @name set
-		 * @memberOf Hash
-		 * @param {string} key The key of the value to set.
-		 * @param {*} value The value to set.
-		 * @returns {Object} Returns the hash instance.
-		 */
-		function hashSet(key, value) {
-			var data = this.__data__;
-			data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
-			return this;
-		}
-
-// Add methods to `Hash`.
-		Hash.prototype.clear = hashClear;
-		Hash.prototype['delete'] = hashDelete;
-		Hash.prototype.get = hashGet;
-		Hash.prototype.has = hashHas;
-		Hash.prototype.set = hashSet;
-
-		/**
-		 * Creates an list cache object.
-		 *
-		 * @private
-		 * @constructor
-		 * @param {Array} [entries] The key-value pairs to cache.
-		 */
-		function ListCache(entries) {
-			var index = -1,
-				length = entries ? entries.length : 0;
-
-			this.clear();
-			while (++index < length) {
-				var entry = entries[index];
-				this.set(entry[0], entry[1]);
-			}
-		}
-
-		/**
-		 * Removes all key-value entries from the list cache.
-		 *
-		 * @private
-		 * @name clear
-		 * @memberOf ListCache
-		 */
-		function listCacheClear() {
-			this.__data__ = [];
-		}
-
-		/**
-		 * Removes `key` and its value from the list cache.
-		 *
-		 * @private
-		 * @name delete
-		 * @memberOf ListCache
-		 * @param {string} key The key of the value to remove.
-		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
-		 */
-		function listCacheDelete(key) {
-			var data = this.__data__,
-				index = assocIndexOf(data, key);
-
-			if (index < 0) {
-				return false;
-			}
-			var lastIndex = data.length - 1;
-			if (index == lastIndex) {
-				data.pop();
-			} else {
-				splice.call(data, index, 1);
-			}
-			return true;
-		}
-
-		/**
-		 * Gets the list cache value for `key`.
-		 *
-		 * @private
-		 * @name get
-		 * @memberOf ListCache
-		 * @param {string} key The key of the value to get.
-		 * @returns {*} Returns the entry value.
-		 */
-		function listCacheGet(key) {
-			var data = this.__data__,
-				index = assocIndexOf(data, key);
-
-			return index < 0 ? undefined : data[index][1];
-		}
-
-		/**
-		 * Checks if a list cache value for `key` exists.
-		 *
-		 * @private
-		 * @name has
-		 * @memberOf ListCache
-		 * @param {string} key The key of the entry to check.
-		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
-		 */
-		function listCacheHas(key) {
-			return assocIndexOf(this.__data__, key) > -1;
-		}
-
-		/**
-		 * Sets the list cache `key` to `value`.
-		 *
-		 * @private
-		 * @name set
-		 * @memberOf ListCache
-		 * @param {string} key The key of the value to set.
-		 * @param {*} value The value to set.
-		 * @returns {Object} Returns the list cache instance.
-		 */
-		function listCacheSet(key, value) {
-			var data = this.__data__,
-				index = assocIndexOf(data, key);
-
-			if (index < 0) {
-				data.push([key, value]);
-			} else {
-				data[index][1] = value;
-			}
-			return this;
-		}
-
-// Add methods to `ListCache`.
-		ListCache.prototype.clear = listCacheClear;
-		ListCache.prototype['delete'] = listCacheDelete;
-		ListCache.prototype.get = listCacheGet;
-		ListCache.prototype.has = listCacheHas;
-		ListCache.prototype.set = listCacheSet;
-
-		/**
-		 * Creates a map cache object to store key-value pairs.
-		 *
-		 * @private
-		 * @constructor
-		 * @param {Array} [entries] The key-value pairs to cache.
-		 */
-		function MapCache(entries) {
-			var index = -1,
-				length = entries ? entries.length : 0;
-
-			this.clear();
-			while (++index < length) {
-				var entry = entries[index];
-				this.set(entry[0], entry[1]);
-			}
-		}
-
-		/**
-		 * Removes all key-value entries from the map.
-		 *
-		 * @private
-		 * @name clear
-		 * @memberOf MapCache
-		 */
-		function mapCacheClear() {
-			this.__data__ = {
-				'hash': new Hash,
-				'map': new (Map || ListCache),
-				'string': new Hash
-			};
-		}
-
-		/**
-		 * Removes `key` and its value from the map.
-		 *
-		 * @private
-		 * @name delete
-		 * @memberOf MapCache
-		 * @param {string} key The key of the value to remove.
-		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
-		 */
-		function mapCacheDelete(key) {
-			return getMapData(this, key)['delete'](key);
-		}
-
-		/**
-		 * Gets the map value for `key`.
-		 *
-		 * @private
-		 * @name get
-		 * @memberOf MapCache
-		 * @param {string} key The key of the value to get.
-		 * @returns {*} Returns the entry value.
-		 */
-		function mapCacheGet(key) {
-			return getMapData(this, key).get(key);
-		}
-
-		/**
-		 * Checks if a map value for `key` exists.
-		 *
-		 * @private
-		 * @name has
-		 * @memberOf MapCache
-		 * @param {string} key The key of the entry to check.
-		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
-		 */
-		function mapCacheHas(key) {
-			return getMapData(this, key).has(key);
-		}
-
-		/**
-		 * Sets the map `key` to `value`.
-		 *
-		 * @private
-		 * @name set
-		 * @memberOf MapCache
-		 * @param {string} key The key of the value to set.
-		 * @param {*} value The value to set.
-		 * @returns {Object} Returns the map cache instance.
-		 */
-		function mapCacheSet(key, value) {
-			getMapData(this, key).set(key, value);
-			return this;
-		}
-
-// Add methods to `MapCache`.
-		MapCache.prototype.clear = mapCacheClear;
-		MapCache.prototype['delete'] = mapCacheDelete;
-		MapCache.prototype.get = mapCacheGet;
-		MapCache.prototype.has = mapCacheHas;
-		MapCache.prototype.set = mapCacheSet;
-
-		/**
-		 * Creates a stack cache object to store key-value pairs.
-		 *
-		 * @private
-		 * @constructor
-		 * @param {Array} [entries] The key-value pairs to cache.
-		 */
-		function Stack(entries) {
-			this.__data__ = new ListCache(entries);
-		}
-
-		/**
-		 * Removes all key-value entries from the stack.
-		 *
-		 * @private
-		 * @name clear
-		 * @memberOf Stack
-		 */
-		function stackClear() {
-			this.__data__ = new ListCache;
-		}
-
-		/**
-		 * Removes `key` and its value from the stack.
-		 *
-		 * @private
-		 * @name delete
-		 * @memberOf Stack
-		 * @param {string} key The key of the value to remove.
-		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
-		 */
-		function stackDelete(key) {
-			return this.__data__['delete'](key);
-		}
-
-		/**
-		 * Gets the stack value for `key`.
-		 *
-		 * @private
-		 * @name get
-		 * @memberOf Stack
-		 * @param {string} key The key of the value to get.
-		 * @returns {*} Returns the entry value.
-		 */
-		function stackGet(key) {
-			return this.__data__.get(key);
-		}
-
-		/**
-		 * Checks if a stack value for `key` exists.
-		 *
-		 * @private
-		 * @name has
-		 * @memberOf Stack
-		 * @param {string} key The key of the entry to check.
-		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
-		 */
-		function stackHas(key) {
-			return this.__data__.has(key);
-		}
-
-		/**
-		 * Sets the stack `key` to `value`.
-		 *
-		 * @private
-		 * @name set
-		 * @memberOf Stack
-		 * @param {string} key The key of the value to set.
-		 * @param {*} value The value to set.
-		 * @returns {Object} Returns the stack cache instance.
-		 */
-		function stackSet(key, value) {
-			var cache = this.__data__;
-			if (cache instanceof ListCache) {
-				var pairs = cache.__data__;
-				if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
-					pairs.push([key, value]);
-					return this;
-				}
-				cache = this.__data__ = new MapCache(pairs);
-			}
-			cache.set(key, value);
-			return this;
-		}
-
-// Add methods to `Stack`.
-		Stack.prototype.clear = stackClear;
-		Stack.prototype['delete'] = stackDelete;
-		Stack.prototype.get = stackGet;
-		Stack.prototype.has = stackHas;
-		Stack.prototype.set = stackSet;
-
-		/**
-		 * Creates an array of the enumerable property names of the array-like `value`.
-		 *
-		 * @private
-		 * @param {*} value The value to query.
-		 * @param {boolean} inherited Specify returning inherited property names.
-		 * @returns {Array} Returns the array of property names.
-		 */
-		function arrayLikeKeys(value, inherited) {
-			// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-			// Safari 9 makes `arguments.length` enumerable in strict mode.
-			var result = (isArray(value) || isArguments(value))
-				? baseTimes(value.length, String)
-				: [];
-
-			var length = result.length,
-				skipIndexes = !!length;
-
-			for (var key in value) {
-				if ((inherited || hasOwnProperty.call(value, key)) &&
-					!(skipIndexes && (key == 'length' || isIndex(key, length)))) {
-					result.push(key);
-				}
-			}
-			return result;
-		}
-
-		/**
-		 * Assigns `value` to `key` of `object` if the existing value is not equivalent
-		 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
-		 * for equality comparisons.
-		 *
-		 * @private
-		 * @param {Object} object The object to modify.
-		 * @param {string} key The key of the property to assign.
-		 * @param {*} value The value to assign.
-		 */
-		function assignValue(object, key, value) {
-			var objValue = object[key];
-			if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
-				(value === undefined && !(key in object))) {
-				object[key] = value;
-			}
-		}
-
-		/**
-		 * Gets the index at which the `key` is found in `array` of key-value pairs.
-		 *
-		 * @private
-		 * @param {Array} array The array to inspect.
-		 * @param {*} key The key to search for.
-		 * @returns {number} Returns the index of the matched value, else `-1`.
-		 */
-		function assocIndexOf(array, key) {
-			var length = array.length;
-			while (length--) {
-				if (eq(array[length][0], key)) {
-					return length;
-				}
-			}
-			return -1;
-		}
-
-		/**
-		 * The base implementation of `_.assign` without support for multiple sources
-		 * or `customizer` functions.
-		 *
-		 * @private
-		 * @param {Object} object The destination object.
-		 * @param {Object} source The source object.
-		 * @returns {Object} Returns `object`.
-		 */
-		function baseAssign(object, source) {
-			return object && copyObject(source, keys(source), object);
-		}
-
-		/**
-		 * The base implementation of `_.clone` and `_.cloneDeep` which tracks
-		 * traversed objects.
-		 *
-		 * @private
-		 * @param {*} value The value to clone.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @param {boolean} [isFull] Specify a clone including symbols.
-		 * @param {Function} [customizer] The function to customize cloning.
-		 * @param {string} [key] The key of `value`.
-		 * @param {Object} [object] The parent object of `value`.
-		 * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
-		 * @returns {*} Returns the cloned value.
-		 */
-		function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
-			var result;
-			if (customizer) {
-				result = object ? customizer(value, key, object, stack) : customizer(value);
-			}
-			if (result !== undefined) {
-				return result;
-			}
-			if (!isObject(value)) {
-				return value;
-			}
-			var isArr = isArray(value);
-			if (isArr) {
-				result = initCloneArray(value);
-				if (!isDeep) {
-					return copyArray(value, result);
-				}
-			} else {
-				var tag = getTag(value),
-					isFunc = tag == funcTag || tag == genTag;
-
-				if (isBuffer(value)) {
-					return cloneBuffer(value, isDeep);
-				}
-				if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
-					if (isHostObject(value)) {
-						return object ? value : {};
-					}
-					result = initCloneObject(isFunc ? {} : value);
-					if (!isDeep) {
-						return copySymbols(value, baseAssign(result, value));
-					}
-				} else {
-					if (!cloneableTags[tag]) {
-						return object ? value : {};
-					}
-					result = initCloneByTag(value, tag, baseClone, isDeep);
-				}
-			}
-			// Check for circular references and return its corresponding clone.
-			stack || (stack = new Stack);
-			var stacked = stack.get(value);
-			if (stacked) {
-				return stacked;
-			}
-			stack.set(value, result);
-
-			if (!isArr) {
-				var props = isFull ? getAllKeys(value) : keys(value);
-			}
-			arrayEach(props || value, function(subValue, key) {
-				if (props) {
-					key = subValue;
-					subValue = value[key];
-				}
-				// Recursively populate clone (susceptible to call stack limits).
-				assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
-			});
-			return result;
-		}
-
-		/**
-		 * The base implementation of `_.create` without support for assigning
-		 * properties to the created object.
-		 *
-		 * @private
-		 * @param {Object} prototype The object to inherit from.
-		 * @returns {Object} Returns the new object.
-		 */
-		function baseCreate(proto) {
-			return isObject(proto) ? objectCreate(proto) : {};
-		}
-
-		/**
-		 * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
-		 * `keysFunc` and `symbolsFunc` to get the enumerable property names and
-		 * symbols of `object`.
-		 *
-		 * @private
-		 * @param {Object} object The object to query.
-		 * @param {Function} keysFunc The function to get the keys of `object`.
-		 * @param {Function} symbolsFunc The function to get the symbols of `object`.
-		 * @returns {Array} Returns the array of property names and symbols.
-		 */
-		function baseGetAllKeys(object, keysFunc, symbolsFunc) {
-			var result = keysFunc(object);
-			return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
-		}
-
-		/**
-		 * The base implementation of `getTag`.
-		 *
-		 * @private
-		 * @param {*} value The value to query.
-		 * @returns {string} Returns the `toStringTag`.
-		 */
-		function baseGetTag(value) {
-			return objectToString.call(value);
-		}
-
-		/**
-		 * The base implementation of `_.isNative` without bad shim checks.
-		 *
-		 * @private
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a native function,
-		 *  else `false`.
-		 */
-		function baseIsNative(value) {
-			if (!isObject(value) || isMasked(value)) {
-				return false;
-			}
-			var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
-			return pattern.test(toSource(value));
-		}
-
-		/**
-		 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
-		 *
-		 * @private
-		 * @param {Object} object The object to query.
-		 * @returns {Array} Returns the array of property names.
-		 */
-		function baseKeys(object) {
-			if (!isPrototype(object)) {
-				return nativeKeys(object);
-			}
-			var result = [];
-			for (var key in Object(object)) {
-				if (hasOwnProperty.call(object, key) && key != 'constructor') {
-					result.push(key);
-				}
-			}
-			return result;
-		}
-
-		/**
-		 * Creates a clone of  `buffer`.
-		 *
-		 * @private
-		 * @param {Buffer} buffer The buffer to clone.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Buffer} Returns the cloned buffer.
-		 */
-		function cloneBuffer(buffer, isDeep) {
-			if (isDeep) {
-				return buffer.slice();
-			}
-			var result = new buffer.constructor(buffer.length);
-			buffer.copy(result);
-			return result;
-		}
-
-		/**
-		 * Creates a clone of `arrayBuffer`.
-		 *
-		 * @private
-		 * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
-		 * @returns {ArrayBuffer} Returns the cloned array buffer.
-		 */
-		function cloneArrayBuffer(arrayBuffer) {
-			var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
-			new Uint8Array(result).set(new Uint8Array(arrayBuffer));
-			return result;
-		}
-
-		/**
-		 * Creates a clone of `dataView`.
-		 *
-		 * @private
-		 * @param {Object} dataView The data view to clone.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Object} Returns the cloned data view.
-		 */
-		function cloneDataView(dataView, isDeep) {
-			var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
-			return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
-		}
-
-		/**
-		 * Creates a clone of `map`.
-		 *
-		 * @private
-		 * @param {Object} map The map to clone.
-		 * @param {Function} cloneFunc The function to clone values.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Object} Returns the cloned map.
-		 */
-		function cloneMap(map, isDeep, cloneFunc) {
-			var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
-			return arrayReduce(array, addMapEntry, new map.constructor);
-		}
-
-		/**
-		 * Creates a clone of `regexp`.
-		 *
-		 * @private
-		 * @param {Object} regexp The regexp to clone.
-		 * @returns {Object} Returns the cloned regexp.
-		 */
-		function cloneRegExp(regexp) {
-			var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
-			result.lastIndex = regexp.lastIndex;
-			return result;
-		}
-
-		/**
-		 * Creates a clone of `set`.
-		 *
-		 * @private
-		 * @param {Object} set The set to clone.
-		 * @param {Function} cloneFunc The function to clone values.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Object} Returns the cloned set.
-		 */
-		function cloneSet(set, isDeep, cloneFunc) {
-			var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
-			return arrayReduce(array, addSetEntry, new set.constructor);
-		}
-
-		/**
-		 * Creates a clone of the `symbol` object.
-		 *
-		 * @private
-		 * @param {Object} symbol The symbol object to clone.
-		 * @returns {Object} Returns the cloned symbol object.
-		 */
-		function cloneSymbol(symbol) {
-			return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
-		}
-
-		/**
-		 * Creates a clone of `typedArray`.
-		 *
-		 * @private
-		 * @param {Object} typedArray The typed array to clone.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Object} Returns the cloned typed array.
-		 */
-		function cloneTypedArray(typedArray, isDeep) {
-			var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
-			return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
-		}
-
-		/**
-		 * Copies the values of `source` to `array`.
-		 *
-		 * @private
-		 * @param {Array} source The array to copy values from.
-		 * @param {Array} [array=[]] The array to copy values to.
-		 * @returns {Array} Returns `array`.
-		 */
-		function copyArray(source, array) {
-			var index = -1,
-				length = source.length;
-
-			array || (array = Array(length));
-			while (++index < length) {
-				array[index] = source[index];
-			}
-			return array;
-		}
-
-		/**
-		 * Copies properties of `source` to `object`.
-		 *
-		 * @private
-		 * @param {Object} source The object to copy properties from.
-		 * @param {Array} props The property identifiers to copy.
-		 * @param {Object} [object={}] The object to copy properties to.
-		 * @param {Function} [customizer] The function to customize copied values.
-		 * @returns {Object} Returns `object`.
-		 */
-		function copyObject(source, props, object, customizer) {
-			object || (object = {});
-
-			var index = -1,
-				length = props.length;
-
-			while (++index < length) {
-				var key = props[index];
-
-				var newValue = customizer
-					? customizer(object[key], source[key], key, object, source)
-					: undefined;
-
-				assignValue(object, key, newValue === undefined ? source[key] : newValue);
-			}
-			return object;
-		}
-
-		/**
-		 * Copies own symbol properties of `source` to `object`.
-		 *
-		 * @private
-		 * @param {Object} source The object to copy symbols from.
-		 * @param {Object} [object={}] The object to copy symbols to.
-		 * @returns {Object} Returns `object`.
-		 */
-		function copySymbols(source, object) {
-			return copyObject(source, getSymbols(source), object);
-		}
-
-		/**
-		 * Creates an array of own enumerable property names and symbols of `object`.
-		 *
-		 * @private
-		 * @param {Object} object The object to query.
-		 * @returns {Array} Returns the array of property names and symbols.
-		 */
-		function getAllKeys(object) {
-			return baseGetAllKeys(object, keys, getSymbols);
-		}
-
-		/**
-		 * Gets the data for `map`.
-		 *
-		 * @private
-		 * @param {Object} map The map to query.
-		 * @param {string} key The reference key.
-		 * @returns {*} Returns the map data.
-		 */
-		function getMapData(map, key) {
-			var data = map.__data__;
-			return isKeyable(key)
-				? data[typeof key == 'string' ? 'string' : 'hash']
-				: data.map;
-		}
-
-		/**
-		 * Gets the native function at `key` of `object`.
-		 *
-		 * @private
-		 * @param {Object} object The object to query.
-		 * @param {string} key The key of the method to get.
-		 * @returns {*} Returns the function if it's native, else `undefined`.
-		 */
-		function getNative(object, key) {
-			var value = getValue(object, key);
-			return baseIsNative(value) ? value : undefined;
-		}
-
-		/**
-		 * Creates an array of the own enumerable symbol properties of `object`.
-		 *
-		 * @private
-		 * @param {Object} object The object to query.
-		 * @returns {Array} Returns the array of symbols.
-		 */
-		var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
-
-		/**
-		 * Gets the `toStringTag` of `value`.
-		 *
-		 * @private
-		 * @param {*} value The value to query.
-		 * @returns {string} Returns the `toStringTag`.
-		 */
-		var getTag = baseGetTag;
-
-// Fallback for data views, maps, sets, and weak maps in IE 11,
-// for data views in Edge < 14, and promises in Node.js.
-		if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
-			(Map && getTag(new Map) != mapTag) ||
-			(Promise && getTag(Promise.resolve()) != promiseTag) ||
-			(Set && getTag(new Set) != setTag) ||
-			(WeakMap && getTag(new WeakMap) != weakMapTag)) {
-			getTag = function(value) {
-				var result = objectToString.call(value),
-					Ctor = result == objectTag ? value.constructor : undefined,
-					ctorString = Ctor ? toSource(Ctor) : undefined;
-
-				if (ctorString) {
-					switch (ctorString) {
-						case dataViewCtorString: return dataViewTag;
-						case mapCtorString: return mapTag;
-						case promiseCtorString: return promiseTag;
-						case setCtorString: return setTag;
-						case weakMapCtorString: return weakMapTag;
-					}
-				}
-				return result;
-			};
-		}
-
-		/**
-		 * Initializes an array clone.
-		 *
-		 * @private
-		 * @param {Array} array The array to clone.
-		 * @returns {Array} Returns the initialized clone.
-		 */
-		function initCloneArray(array) {
-			var length = array.length,
-				result = array.constructor(length);
-
-			// Add properties assigned by `RegExp#exec`.
-			if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
-				result.index = array.index;
-				result.input = array.input;
-			}
-			return result;
-		}
-
-		/**
-		 * Initializes an object clone.
-		 *
-		 * @private
-		 * @param {Object} object The object to clone.
-		 * @returns {Object} Returns the initialized clone.
-		 */
-		function initCloneObject(object) {
-			return (typeof object.constructor == 'function' && !isPrototype(object))
-				? baseCreate(getPrototype(object))
-				: {};
-		}
-
-		/**
-		 * Initializes an object clone based on its `toStringTag`.
-		 *
-		 * **Note:** This function only supports cloning values with tags of
-		 * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
-		 *
-		 * @private
-		 * @param {Object} object The object to clone.
-		 * @param {string} tag The `toStringTag` of the object to clone.
-		 * @param {Function} cloneFunc The function to clone values.
-		 * @param {boolean} [isDeep] Specify a deep clone.
-		 * @returns {Object} Returns the initialized clone.
-		 */
-		function initCloneByTag(object, tag, cloneFunc, isDeep) {
-			var Ctor = object.constructor;
-			switch (tag) {
-				case arrayBufferTag:
-					return cloneArrayBuffer(object);
-
-				case boolTag:
-				case dateTag:
-					return new Ctor(+object);
-
-				case dataViewTag:
-					return cloneDataView(object, isDeep);
-
-				case float32Tag: case float64Tag:
-				case int8Tag: case int16Tag: case int32Tag:
-				case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
-				return cloneTypedArray(object, isDeep);
-
-				case mapTag:
-					return cloneMap(object, isDeep, cloneFunc);
-
-				case numberTag:
-				case stringTag:
-					return new Ctor(object);
-
-				case regexpTag:
-					return cloneRegExp(object);
-
-				case setTag:
-					return cloneSet(object, isDeep, cloneFunc);
-
-				case symbolTag:
-					return cloneSymbol(object);
-			}
-		}
-
-		/**
-		 * Checks if `value` is a valid array-like index.
-		 *
-		 * @private
-		 * @param {*} value The value to check.
-		 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
-		 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
-		 */
-		function isIndex(value, length) {
-			length = length == null ? MAX_SAFE_INTEGER : length;
-			return !!length &&
-				(typeof value == 'number' || reIsUint.test(value)) &&
-				(value > -1 && value % 1 == 0 && value < length);
-		}
-
-		/**
-		 * Checks if `value` is suitable for use as unique object key.
-		 *
-		 * @private
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
-		 */
-		function isKeyable(value) {
-			var type = typeof value;
-			return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
-				? (value !== '__proto__')
-				: (value === null);
-		}
-
-		/**
-		 * Checks if `func` has its source masked.
-		 *
-		 * @private
-		 * @param {Function} func The function to check.
-		 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
-		 */
-		function isMasked(func) {
-			return !!maskSrcKey && (maskSrcKey in func);
-		}
-
-		/**
-		 * Checks if `value` is likely a prototype object.
-		 *
-		 * @private
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
-		 */
-		function isPrototype(value) {
-			var Ctor = value && value.constructor,
-				proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
-
-			return value === proto;
-		}
-
-		/**
-		 * Converts `func` to its source code.
-		 *
-		 * @private
-		 * @param {Function} func The function to process.
-		 * @returns {string} Returns the source code.
-		 */
-		function toSource(func) {
-			if (func != null) {
-				try {
-					return funcToString.call(func);
-				} catch (e) {}
-				try {
-					return (func + '');
-				} catch (e) {}
-			}
-			return '';
-		}
-
-		/**
-		 * This method is like `_.clone` except that it recursively clones `value`.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 1.0.0
-		 * @category Lang
-		 * @param {*} value The value to recursively clone.
-		 * @returns {*} Returns the deep cloned value.
-		 * @see _.clone
-		 * @example
-		 *
-		 * var objects = [{ 'a': 1 }, { 'b': 2 }];
-		 *
-		 * var deep = _.cloneDeep(objects);
-		 * console.log(deep[0] === objects[0]);
-		 * // => false
-		 */
-		function cloneDeep(value) {
-			return baseClone(value, true, true);
-		}
-
-		/**
-		 * Performs a
-		 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
-		 * comparison between two values to determine if they are equivalent.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.0.0
-		 * @category Lang
-		 * @param {*} value The value to compare.
-		 * @param {*} other The other value to compare.
-		 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
-		 * @example
-		 *
-		 * var object = { 'a': 1 };
-		 * var other = { 'a': 1 };
-		 *
-		 * _.eq(object, object);
-		 * // => true
-		 *
-		 * _.eq(object, other);
-		 * // => false
-		 *
-		 * _.eq('a', 'a');
-		 * // => true
-		 *
-		 * _.eq('a', Object('a'));
-		 * // => false
-		 *
-		 * _.eq(NaN, NaN);
-		 * // => true
-		 */
-		function eq(value, other) {
-			return value === other || (value !== value && other !== other);
-		}
-
-		/**
-		 * Checks if `value` is likely an `arguments` object.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 0.1.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
-		 *  else `false`.
-		 * @example
-		 *
-		 * _.isArguments(function() { return arguments; }());
-		 * // => true
-		 *
-		 * _.isArguments([1, 2, 3]);
-		 * // => false
-		 */
-		function isArguments(value) {
-			// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
-			return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
-				(!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
-		}
-
-		/**
-		 * Checks if `value` is classified as an `Array` object.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 0.1.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
-		 * @example
-		 *
-		 * _.isArray([1, 2, 3]);
-		 * // => true
-		 *
-		 * _.isArray(document.body.children);
-		 * // => false
-		 *
-		 * _.isArray('abc');
-		 * // => false
-		 *
-		 * _.isArray(_.noop);
-		 * // => false
-		 */
-		var isArray = Array.isArray;
-
-		/**
-		 * Checks if `value` is array-like. A value is considered array-like if it's
-		 * not a function and has a `value.length` that's an integer greater than or
-		 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.0.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
-		 * @example
-		 *
-		 * _.isArrayLike([1, 2, 3]);
-		 * // => true
-		 *
-		 * _.isArrayLike(document.body.children);
-		 * // => true
-		 *
-		 * _.isArrayLike('abc');
-		 * // => true
-		 *
-		 * _.isArrayLike(_.noop);
-		 * // => false
-		 */
-		function isArrayLike(value) {
-			return value != null && isLength(value.length) && !isFunction(value);
-		}
-
-		/**
-		 * This method is like `_.isArrayLike` except that it also checks if `value`
-		 * is an object.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.0.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is an array-like object,
-		 *  else `false`.
-		 * @example
-		 *
-		 * _.isArrayLikeObject([1, 2, 3]);
-		 * // => true
-		 *
-		 * _.isArrayLikeObject(document.body.children);
-		 * // => true
-		 *
-		 * _.isArrayLikeObject('abc');
-		 * // => false
-		 *
-		 * _.isArrayLikeObject(_.noop);
-		 * // => false
-		 */
-		function isArrayLikeObject(value) {
-			return isObjectLike(value) && isArrayLike(value);
-		}
-
-		/**
-		 * Checks if `value` is a buffer.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.3.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
-		 * @example
-		 *
-		 * _.isBuffer(new Buffer(2));
-		 * // => true
-		 *
-		 * _.isBuffer(new Uint8Array(2));
-		 * // => false
-		 */
-		var isBuffer = nativeIsBuffer || stubFalse;
-
-		/**
-		 * Checks if `value` is classified as a `Function` object.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 0.1.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
-		 * @example
-		 *
-		 * _.isFunction(_);
-		 * // => true
-		 *
-		 * _.isFunction(/abc/);
-		 * // => false
-		 */
-		function isFunction(value) {
-			// The use of `Object#toString` avoids issues with the `typeof` operator
-			// in Safari 8-9 which returns 'object' for typed array and other constructors.
-			var tag = isObject(value) ? objectToString.call(value) : '';
-			return tag == funcTag || tag == genTag;
-		}
-
-		/**
-		 * Checks if `value` is a valid array-like length.
-		 *
-		 * **Note:** This method is loosely based on
-		 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.0.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
-		 * @example
-		 *
-		 * _.isLength(3);
-		 * // => true
-		 *
-		 * _.isLength(Number.MIN_VALUE);
-		 * // => false
-		 *
-		 * _.isLength(Infinity);
-		 * // => false
-		 *
-		 * _.isLength('3');
-		 * // => false
-		 */
-		function isLength(value) {
-			return typeof value == 'number' &&
-				value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
-		}
-
-		/**
-		 * Checks if `value` is the
-		 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-		 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 0.1.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-		 * @example
-		 *
-		 * _.isObject({});
-		 * // => true
-		 *
-		 * _.isObject([1, 2, 3]);
-		 * // => true
-		 *
-		 * _.isObject(_.noop);
-		 * // => true
-		 *
-		 * _.isObject(null);
-		 * // => false
-		 */
-		function isObject(value) {
-			var type = typeof value;
-			return !!value && (type == 'object' || type == 'function');
-		}
-
-		/**
-		 * Checks if `value` is object-like. A value is object-like if it's not `null`
-		 * and has a `typeof` result of "object".
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.0.0
-		 * @category Lang
-		 * @param {*} value The value to check.
-		 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-		 * @example
-		 *
-		 * _.isObjectLike({});
-		 * // => true
-		 *
-		 * _.isObjectLike([1, 2, 3]);
-		 * // => true
-		 *
-		 * _.isObjectLike(_.noop);
-		 * // => false
-		 *
-		 * _.isObjectLike(null);
-		 * // => false
-		 */
-		function isObjectLike(value) {
-			return !!value && typeof value == 'object';
-		}
-
-		/**
-		 * Creates an array of the own enumerable property names of `object`.
-		 *
-		 * **Note:** Non-object values are coerced to objects. See the
-		 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
-		 * for more details.
-		 *
-		 * @static
-		 * @since 0.1.0
-		 * @memberOf _
-		 * @category Object
-		 * @param {Object} object The object to query.
-		 * @returns {Array} Returns the array of property names.
-		 * @example
-		 *
-		 * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
-		 *
-		 * Foo.prototype.c = 3;
-		 *
-		 * _.keys(new Foo);
-		 * // => ['a', 'b'] (iteration order is not guaranteed)
-		 *
-		 * _.keys('hi');
-		 * // => ['0', '1']
-		 */
-		function keys(object) {
-			return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
-		}
-
-		/**
-		 * This method returns a new empty array.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.13.0
-		 * @category Util
-		 * @returns {Array} Returns the new empty array.
-		 * @example
-		 *
-		 * var arrays = _.times(2, _.stubArray);
-		 *
-		 * console.log(arrays);
-		 * // => [[], []]
-		 *
-		 * console.log(arrays[0] === arrays[1]);
-		 * // => false
-		 */
-		function stubArray() {
-			return [];
-		}
-
-		/**
-		 * This method returns `false`.
-		 *
-		 * @static
-		 * @memberOf _
-		 * @since 4.13.0
-		 * @category Util
-		 * @returns {boolean} Returns `false`.
-		 * @example
-		 *
-		 * _.times(2, _.stubFalse);
-		 * // => [false, false]
-		 */
-		function stubFalse() {
-			return false;
-		}
-
-		module.exports = cloneDeep;
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],48:[function(require,module,exports){
-	var support = require('webrtcsupport');
-
-
-	function GainController(stream) {
-		this.support = support.webAudio && support.mediaStream;
-
-		// set our starting value
-		this.gain = 1;
-
-		if (this.support) {
-			var context = this.context = new support.AudioContext();
-			this.microphone = context.createMediaStreamSource(stream);
-			this.gainFilter = context.createGain();
-			this.destination = context.createMediaStreamDestination();
-			this.outputStream = this.destination.stream;
-			this.microphone.connect(this.gainFilter);
-			this.gainFilter.connect(this.destination);
-			stream.addTrack(this.outputStream.getAudioTracks()[0]);
-			stream.removeTrack(stream.getAudioTracks()[0]);
-		}
-		this.stream = stream;
-	}
-
-// setting
-	GainController.prototype.setGain = function (val) {
-		// check for support
-		if (!this.support) return;
-		this.gainFilter.gain.value = val;
-		this.gain = val;
-	};
-
-	GainController.prototype.getGain = function () {
-		return this.gain;
-	};
-
-	GainController.prototype.off = function () {
-		return this.setGain(0);
-	};
-
-	GainController.prototype.on = function () {
-		this.setGain(1);
-	};
-
-
-	module.exports = GainController;
-
-},{"webrtcsupport":49}],49:[function(require,module,exports){
-// created by @HenrikJoreteg
-	var prefix;
-	var version;
-
-	if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
-		prefix = 'moz';
-		version = navigator.userAgent.match(/Firefox/) && parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
-	} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
-		prefix = 'webkit';
-		version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
-	}
-
-	var PC = window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
-	var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
-	var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
-	var MediaStream = window.webkitMediaStream || window.MediaStream;
-	var screenSharing = window.location.protocol === 'https:' &&
-		((prefix === 'webkit' && version >= 26) ||
-		(prefix === 'moz' && version >= 33))
-	var AudioContext = window.AudioContext || window.webkitAudioContext;
-	var videoEl = document.createElement('video');
-	var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
-	var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;
-
-// export support flags and constructors.prototype && PC
-	module.exports = {
-		prefix: prefix,
-		browserVersion: version,
-		support: !!PC && supportVp8 && !!getUserMedia,
-		// new support style
-		supportRTCPeerConnection: !!PC,
-		supportVp8: supportVp8,
-		supportGetUserMedia: !!getUserMedia,
-		supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
-		supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
-		supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
-		supportScreenSharing: screenSharing,
-		// old deprecated style. Dont use this anymore
-		dataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
-		webAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
-		mediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
-		screenSharing: screenSharing,
-		// constructors
-		AudioContext: AudioContext,
-		PeerConnection: PC,
-		SessionDescription: SessionDescription,
-		IceCandidate: IceCandidate,
-		MediaStream: MediaStream,
-		getUserMedia: getUserMedia
-	};
-
-},{}],50:[function(require,module,exports){
-	var methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",");
-	var l = methods.length;
-	var fn = function () {};
-	var mockconsole = {};
-
-	while (l--) {
-		mockconsole[methods[l]] = fn;
-	}
-
-	module.exports = mockconsole;
-
-},{}],51:[function(require,module,exports){
-
-	/**
-	 * HOP ref.
-	 */
-
-	var has = Object.prototype.hasOwnProperty;
-
-	/**
-	 * Return own keys in `obj`.
-	 *
-	 * @param {Object} obj
-	 * @return {Array}
-	 * @api public
-	 */
-
-	exports.keys = Object.keys || function(obj){
-			var keys = [];
-			for (var key in obj) {
-				if (has.call(obj, key)) {
-					keys.push(key);
-				}
-			}
-			return keys;
-		};
-
-	/**
-	 * Return own values in `obj`.
-	 *
-	 * @param {Object} obj
-	 * @return {Array}
-	 * @api public
-	 */
-
-	exports.values = function(obj){
-		var vals = [];
-		for (var key in obj) {
-			if (has.call(obj, key)) {
-				vals.push(obj[key]);
-			}
-		}
-		return vals;
-	};
-
-	/**
-	 * Merge `b` into `a`.
-	 *
-	 * @param {Object} a
-	 * @param {Object} b
-	 * @return {Object} a
-	 * @api public
-	 */
-
-	exports.merge = function(a, b){
-		for (var key in b) {
-			if (has.call(b, key)) {
-				a[key] = b[key];
-			}
-		}
-		return a;
-	};
-
-	/**
-	 * Return length of `obj`.
-	 *
-	 * @param {Object} obj
-	 * @return {Number}
-	 * @api public
-	 */
-
-	exports.length = function(obj){
-		return exports.keys(obj).length;
-	};
-
-	/**
-	 * Check if `obj` is empty.
-	 *
-	 * @param {Object} obj
-	 * @return {Boolean}
-	 * @api public
-	 */
-
-	exports.isEmpty = function(obj){
-		return 0 == exports.length(obj);
-	};
-},{}],52:[function(require,module,exports){
-	(function (global){
-		/**
-		 * JSON parse.
-		 *
-		 * @see Based on jQuery#parseJSON (MIT) and JSON2
-		 * @api private
-		 */
-
-		var rvalidchars = /^[\],:{}\s]*$/;
-		var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-		var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-		var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
-		var rtrimLeft = /^\s+/;
-		var rtrimRight = /\s+$/;
-
-		module.exports = function parsejson(data) {
-			if ('string' != typeof data || !data) {
-				return null;
-			}
-
-			data = data.replace(rtrimLeft, '').replace(rtrimRight, '');
-
-			// Attempt to parse using the native JSON parser first
-			if (global.JSON && JSON.parse) {
-				return JSON.parse(data);
-			}
-
-			if (rvalidchars.test(data.replace(rvalidescape, '@')
-					.replace(rvalidtokens, ']')
-					.replace(rvalidbraces, ''))) {
-				return (new Function('return ' + data))();
-			}
-		};
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],53:[function(require,module,exports){
-	/**
-	 * Compiles a querystring
-	 * Returns string representation of the object
-	 *
-	 * @param {Object}
-	 * @api private
-	 */
-
-	exports.encode = function (obj) {
-		var str = '';
-
-		for (var i in obj) {
-			if (obj.hasOwnProperty(i)) {
-				if (str.length) str += '&';
-				str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
-			}
-		}
-
-		return str;
-	};
-
-	/**
-	 * Parses a simple querystring into an object
-	 *
-	 * @param {String} qs
-	 * @api private
-	 */
-
-	exports.decode = function(qs){
-		var qry = {};
-		var pairs = qs.split('&');
-		for (var i = 0, l = pairs.length; i < l; i++) {
-			var pair = pairs[i].split('=');
-			qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
-		}
-		return qry;
-	};
-
-},{}],54:[function(require,module,exports){
-	/**
-	 * Parses an URI
-	 *
-	 * @author Steven Levithan <stevenlevithan.com> (MIT license)
-	 * @api private
-	 */
-
-	var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
-
-	var parts = [
-		'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host'
-		, 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
-	];
-
-	module.exports = function parseuri(str) {
-		var m = re.exec(str || '')
-			, uri = {}
-			, i = 14;
-
-		while (i--) {
-			uri[parts[i]] = m[i] || '';
-		}
-
-		return uri;
-	};
-
-},{}],55:[function(require,module,exports){
-// shim for using process in browser
-	var process = module.exports = {};
-
-// cached from whatever global is present so that test runners that stub it
-// don't break things.  But we need to wrap it in a try catch in case it is
-// wrapped in strict mode code which doesn't define any globals.  It's inside a
-// function because try/catches deoptimize in certain engines.
-
-	var cachedSetTimeout;
-	var cachedClearTimeout;
-
-	function defaultSetTimout() {
-		throw new Error('setTimeout has not been defined');
-	}
-	function defaultClearTimeout () {
-		throw new Error('clearTimeout has not been defined');
-	}
-	(function () {
-		try {
-			if (typeof setTimeout === 'function') {
-				cachedSetTimeout = setTimeout;
-			} else {
-				cachedSetTimeout = defaultSetTimout;
-			}
-		} catch (e) {
-			cachedSetTimeout = defaultSetTimout;
-		}
-		try {
-			if (typeof clearTimeout === 'function') {
-				cachedClearTimeout = clearTimeout;
-			} else {
-				cachedClearTimeout = defaultClearTimeout;
-			}
-		} catch (e) {
-			cachedClearTimeout = defaultClearTimeout;
-		}
-	} ())
-	function runTimeout(fun) {
-		if (cachedSetTimeout === setTimeout) {
-			//normal enviroments in sane situations
-			return setTimeout(fun, 0);
-		}
-		// if setTimeout wasn't available but was latter defined
-		if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
-			cachedSetTimeout = setTimeout;
-			return setTimeout(fun, 0);
-		}
-		try {
-			// when when somebody has screwed with setTimeout but no I.E. maddness
-			return cachedSetTimeout(fun, 0);
-		} catch(e){
-			try {
-				// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
-				return cachedSetTimeout.call(null, fun, 0);
-			} catch(e){
-				// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
-				return cachedSetTimeout.call(this, fun, 0);
-			}
-		}
-
-
-	}
-	function runClearTimeout(marker) {
-		if (cachedClearTimeout === clearTimeout) {
-			//normal enviroments in sane situations
-			return clearTimeout(marker);
-		}
-		// if clearTimeout wasn't available but was latter defined
-		if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
-			cachedClearTimeout = clearTimeout;
-			return clearTimeout(marker);
-		}
-		try {
-			// when when somebody has screwed with setTimeout but no I.E. maddness
-			return cachedClearTimeout(marker);
-		} catch (e){
-			try {
-				// When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
-				return cachedClearTimeout.call(null, marker);
-			} catch (e){
-				// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
-				// Some versions of I.E. have different rules for clearTimeout vs setTimeout
-				return cachedClearTimeout.call(this, marker);
-			}
-		}
-
-
-
-	}
-	var queue = [];
-	var draining = false;
-	var currentQueue;
-	var queueIndex = -1;
-
-	function cleanUpNextTick() {
-		if (!draining || !currentQueue) {
-			return;
-		}
-		draining = false;
-		if (currentQueue.length) {
-			queue = currentQueue.concat(queue);
-		} else {
-			queueIndex = -1;
-		}
-		if (queue.length) {
-			drainQueue();
-		}
-	}
-
-	function drainQueue() {
-		if (draining) {
-			return;
-		}
-		var timeout = runTimeout(cleanUpNextTick);
-		draining = true;
-
-		var len = queue.length;
-		while(len) {
-			currentQueue = queue;
-			queue = [];
-			while (++queueIndex < len) {
-				if (currentQueue) {
-					currentQueue[queueIndex].run();
-				}
-			}
-			queueIndex = -1;
-			len = queue.length;
-		}
-		currentQueue = null;
-		draining = false;
-		runClearTimeout(timeout);
-	}
-
-	process.nextTick = function (fun) {
-		var args = new Array(arguments.length - 1);
-		if (arguments.length > 1) {
-			for (var i = 1; i < arguments.length; i++) {
-				args[i - 1] = arguments[i];
-			}
-		}
-		queue.push(new Item(fun, args));
-		if (queue.length === 1 && !draining) {
-			runTimeout(drainQueue);
-		}
-	};
-
-// v8 likes predictible objects
-	function Item(fun, array) {
-		this.fun = fun;
-		this.array = array;
-	}
-	Item.prototype.run = function () {
-		this.fun.apply(null, this.array);
-	};
-	process.title = 'browser';
-	process.browser = true;
-	process.env = {};
-	process.argv = [];
-	process.version = ''; // empty string to avoid regexp issues
-	process.versions = {};
-
-	function noop() {}
-
-	process.on = noop;
-	process.addListener = noop;
-	process.once = noop;
-	process.off = noop;
-	process.removeListener = noop;
-	process.removeAllListeners = noop;
-	process.emit = noop;
-
-	process.binding = function (name) {
-		throw new Error('process.binding is not supported');
-	};
-
-	process.cwd = function () { return '/' };
-	process.chdir = function (dir) {
-		throw new Error('process.chdir is not supported');
-	};
-	process.umask = function() { return 0; };
-
-},{}],56:[function(require,module,exports){
-	var util = require('util');
-	var SJJ = require('sdp-jingle-json');
-	var WildEmitter = require('wildemitter');
-	var Peerconn = require('traceablepeerconnection');
-	var adapter = require('webrtc-adapter');
-	var cloneDeep = require('lodash.clonedeep');
-
-	function PeerConnection(config, constraints) {
-		var self = this;
-		var item;
-		WildEmitter.call(this);
-
-		config = config || {};
-		config.iceServers = config.iceServers || [];
-
-		var detectedBrowser = adapter.browserDetails.browser;
-
-		// make sure this only gets enabled in Google Chrome
-		// EXPERIMENTAL FLAG, might get removed without notice
-		this.enableChromeNativeSimulcast = false;
-		if (constraints && constraints.optional &&
-			detectedBrowser === 'chrome' &&
-			navigator.appVersion.match(/Chromium\//) === null) {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.enableChromeNativeSimulcast) {
-					self.enableChromeNativeSimulcast = true;
-				}
-			});
-		}
-
-		// EXPERIMENTAL FLAG, might get removed without notice
-		this.enableMultiStreamHacks = false;
-		if (constraints && constraints.optional &&
-			detectedBrowser === 'chrome') {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.enableMultiStreamHacks) {
-					self.enableMultiStreamHacks = true;
-				}
-			});
-		}
-		// EXPERIMENTAL FLAG, might get removed without notice
-		this.restrictBandwidth = 0;
-		if (constraints && constraints.optional) {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.andyetRestrictBandwidth) {
-					self.restrictBandwidth = constraint.andyetRestrictBandwidth;
-				}
-			});
-		}
-
-		// EXPERIMENTAL FLAG, might get removed without notice
-		// bundle up ice candidates, only works for jingle mode
-		// number > 0 is the delay to wait for additional candidates
-		// ~20ms seems good
-		this.batchIceCandidates = 0;
-		if (constraints && constraints.optional) {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.andyetBatchIce) {
-					self.batchIceCandidates = constraint.andyetBatchIce;
-				}
-			});
-		}
-		this.batchedIceCandidates = [];
-
-		// EXPERIMENTAL FLAG, might get removed without notice
-		// this attemps to strip out candidates with an already known foundation
-		// and type -- i.e. those which are gathered via the same TURN server
-		// but different transports (TURN udp, tcp and tls respectively)
-		if (constraints && constraints.optional && detectedBrowser === 'chrome') {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.andyetFasterICE) {
-					self.eliminateDuplicateCandidates = constraint.andyetFasterICE;
-				}
-			});
-		}
-		// EXPERIMENTAL FLAG, might get removed without notice
-		// when using a server such as the jitsi videobridge we don't need to signal
-		// our candidates
-		if (constraints && constraints.optional) {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.andyetDontSignalCandidates) {
-					self.dontSignalCandidates = constraint.andyetDontSignalCandidates;
-				}
-			});
-		}
-
-
-		// EXPERIMENTAL FLAG, might get removed without notice
-		this.assumeSetLocalSuccess = false;
-		if (constraints && constraints.optional) {
-			constraints.optional.forEach(function (constraint) {
-				if (constraint.andyetAssumeSetLocalSuccess) {
-					self.assumeSetLocalSuccess = constraint.andyetAssumeSetLocalSuccess;
-				}
-			});
-		}
-
-		// EXPERIMENTAL FLAG, might get removed without notice
-		// working around https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
-		// pass in a timeout for this
-		if (detectedBrowser === 'firefox') {
-			if (constraints && constraints.optional) {
-				this.wtFirefox = 0;
-				constraints.optional.forEach(function (constraint) {
-					if (constraint.andyetFirefoxMakesMeSad) {
-						self.wtFirefox = constraint.andyetFirefoxMakesMeSad;
-						if (self.wtFirefox > 0) {
-							self.firefoxcandidatebuffer = [];
-						}
-					}
-				});
-			}
-		}
-
-
-		this.pc = new Peerconn(config, constraints);
-
-		this.getLocalStreams = this.pc.getLocalStreams.bind(this.pc);
-		this.getRemoteStreams = this.pc.getRemoteStreams.bind(this.pc);
-		this.addStream = this.pc.addStream.bind(this.pc);
-		this.removeStream = this.pc.removeStream.bind(this.pc);
-
-		// proxy events
-		this.pc.on('*', function () {
-			self.emit.apply(self, arguments);
-		});
-
-		// proxy some events directly
-		this.pc.onremovestream = this.emit.bind(this, 'removeStream');
-		this.pc.onaddstream = this.emit.bind(this, 'addStream');
-		this.pc.onnegotiationneeded = this.emit.bind(this, 'negotiationNeeded');
-		this.pc.oniceconnectionstatechange = this.emit.bind(this, 'iceConnectionStateChange');
-		this.pc.onsignalingstatechange = this.emit.bind(this, 'signalingStateChange');
-
-		// handle ice candidate and data channel events
-		this.pc.onicecandidate = this._onIce.bind(this);
-		this.pc.ondatachannel = this._onDataChannel.bind(this);
-
-		this.localDescription = {
-			contents: []
-		};
-		this.remoteDescription = {
-			contents: []
-		};
-
-		this.config = {
-			debug: false,
-			sid: '',
-			isInitiator: true,
-			sdpSessionID: Date.now(),
-			useJingle: false
-		};
-
-		this.iceCredentials = {
-			local: {},
-			remote: {}
-		};
-
-		// apply our config
-		for (item in config) {
-			this.config[item] = config[item];
-		}
-
-		if (this.config.debug) {
-			this.on('*', function () {
-				var logger = config.logger || console;
-				logger.log('PeerConnection event:', arguments);
-			});
-		}
-		this.hadLocalStunCandidate = false;
-		this.hadRemoteStunCandidate = false;
-		this.hadLocalRelayCandidate = false;
-		this.hadRemoteRelayCandidate = false;
-
-		this.hadLocalIPv6Candidate = false;
-		this.hadRemoteIPv6Candidate = false;
-
-		// keeping references for all our data channels
-		// so they dont get garbage collected
-		// can be removed once the following bugs have been fixed
-		// https://crbug.com/405545
-		// https://bugzilla.mozilla.org/show_bug.cgi?id=964092
-		// to be filed for opera
-		this._remoteDataChannels = [];
-		this._localDataChannels = [];
-
-		this._candidateBuffer = [];
-	}
-
-	util.inherits(PeerConnection, WildEmitter);
-
-	Object.defineProperty(PeerConnection.prototype, 'signalingState', {
-		get: function () {
-			return this.pc.signalingState;
-		}
-	});
-	Object.defineProperty(PeerConnection.prototype, 'iceConnectionState', {
-		get: function () {
-			return this.pc.iceConnectionState;
-		}
-	});
-
-	PeerConnection.prototype._role = function () {
-		return this.isInitiator ? 'initiator' : 'responder';
-	};
-
-// Add a stream to the peer connection object
-	PeerConnection.prototype.addStream = function (stream) {
-		this.localStream = stream;
-		this.pc.addStream(stream);
-	};
-
-// helper function to check if a remote candidate is a stun/relay
-// candidate or an ipv6 candidate
-	PeerConnection.prototype._checkLocalCandidate = function (candidate) {
-		var cand = SJJ.toCandidateJSON(candidate);
-		if (cand.type == 'srflx') {
-			this.hadLocalStunCandidate = true;
-		} else if (cand.type == 'relay') {
-			this.hadLocalRelayCandidate = true;
-		}
-		if (cand.ip.indexOf(':') != -1) {
-			this.hadLocalIPv6Candidate = true;
-		}
-	};
-
-// helper function to check if a remote candidate is a stun/relay
-// candidate or an ipv6 candidate
-	PeerConnection.prototype._checkRemoteCandidate = function (candidate) {
-		var cand = SJJ.toCandidateJSON(candidate);
-		if (cand.type == 'srflx') {
-			this.hadRemoteStunCandidate = true;
-		} else if (cand.type == 'relay') {
-			this.hadRemoteRelayCandidate = true;
-		}
-		if (cand.ip.indexOf(':') != -1) {
-			this.hadRemoteIPv6Candidate = true;
-		}
-	};
-
-
-// Init and add ice candidate object with correct constructor
-	PeerConnection.prototype.processIce = function (update, cb) {
-		cb = cb || function () {};
-		var self = this;
-
-		// ignore any added ice candidates to avoid errors. why does the
-		// spec not do this?
-		if (this.pc.signalingState === 'closed') return cb();
-
-		if (update.contents || (update.jingle && update.jingle.contents)) {
-			var contentNames = this.remoteDescription.contents.map(function (c) { return c.name; });
-			var contents = update.contents || update.jingle.contents;
-
-			contents.forEach(function (content) {
-				var transport = content.transport || {};
-				var candidates = transport.candidates || [];
-				var mline = contentNames.indexOf(content.name);
-				var mid = content.name;
-				var remoteContent = self.remoteDescription.contents.find(function (c) {
-					return c.name === content.name;
-				});
-
-				// process candidates as a callback, in case we need to
-				// update ufrag and pwd with offer/answer
-				var processCandidates = function () {
-					candidates.forEach(
-						function (candidate) {
-							var iceCandidate = SJJ.toCandidateSDP(candidate) + '\r\n';
-							self.pc.addIceCandidate(
-								new RTCIceCandidate({
-									candidate: iceCandidate,
-									sdpMLineIndex: mline,
-									sdpMid: mid
-								}), function () {
-									// well, this success callback is pretty meaningless
-								},
-								function (err) {
-									self.emit('error', err);
-								}
-							);
-							self._checkRemoteCandidate(iceCandidate);
-						});
-					cb();
-				};
-
-				if (self.iceCredentials.remote[content.name] && transport.ufrag &&
-					self.iceCredentials.remote[content.name].ufrag !== transport.ufrag) {
-					if (remoteContent) {
-						remoteContent.transport.ufrag = transport.ufrag;
-						remoteContent.transport.pwd = transport.pwd;
-						var offer = {
-							type: 'offer',
-							jingle: self.remoteDescription
-						};
-						offer.sdp = SJJ.toSessionSDP(offer.jingle, {
-							sid: self.config.sdpSessionID,
-							role: self._role(),
-							direction: 'incoming'
-						});
-						self.pc.setRemoteDescription(new RTCSessionDescription(offer),
-							function () {
-								processCandidates();
-							},
-							function (err) {
-								self.emit('error', err);
-							}
-						);
-					} else {
-						self.emit('error', 'ice restart failed to find matching content');
-					}
-				} else {
-					processCandidates();
-				}
-			});
-		} else {
-			// working around https://code.google.com/p/webrtc/issues/detail?id=3669
-			if (update.candidate && update.candidate.candidate.indexOf('a=') !== 0) {
-				update.candidate.candidate = 'a=' + update.candidate.candidate;
-			}
-
-			if (this.wtFirefox && this.firefoxcandidatebuffer !== null) {
-				// we cant add this yet due to https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
-				if (this.pc.localDescription && this.pc.localDescription.type === 'offer') {
-					this.firefoxcandidatebuffer.push(update.candidate);
-					return cb();
-				}
-			}
-
-			self.pc.addIceCandidate(
-				new RTCIceCandidate(update.candidate),
-				function () { },
-				function (err) {
-					self.emit('error', err);
-				}
-			);
-			self._checkRemoteCandidate(update.candidate.candidate);
-			cb();
-		}
-	};
-
-// Generate and emit an offer with the given constraints
-	PeerConnection.prototype.offer = function (constraints, cb) {
-		var self = this;
-		var hasConstraints = arguments.length === 2;
-		var mediaConstraints = hasConstraints && constraints ? constraints : {
-				offerToReceiveAudio: 1,
-				offerToReceiveVideo: 1
-			};
-		cb = hasConstraints ? cb : constraints;
-		cb = cb || function () {};
-
-		if (this.pc.signalingState === 'closed') return cb('Already closed');
-
-		// Actually generate the offer
-		this.pc.createOffer(
-			function (offer) {
-				// does not work for jingle, but jingle.js doesn't need
-				// this hack...
-				var expandedOffer = {
-					type: 'offer',
-					sdp: offer.sdp
-				};
-				if (self.assumeSetLocalSuccess) {
-					self.emit('offer', expandedOffer);
-					cb(null, expandedOffer);
-				}
-				self._candidateBuffer = [];
-				self.pc.setLocalDescription(offer,
-					function () {
-						var jingle;
-						if (self.config.useJingle) {
-							jingle = SJJ.toSessionJSON(offer.sdp, {
-								role: self._role(),
-								direction: 'outgoing'
-							});
-							jingle.sid = self.config.sid;
-							self.localDescription = jingle;
-
-							// Save ICE credentials
-							jingle.contents.forEach(function (content) {
-								var transport = content.transport || {};
-								if (transport.ufrag) {
-									self.iceCredentials.local[content.name] = {
-										ufrag: transport.ufrag,
-										pwd: transport.pwd
-									};
-								}
-							});
-
-							expandedOffer.jingle = jingle;
-						}
-						expandedOffer.sdp.split('\r\n').forEach(function (line) {
-							if (line.indexOf('a=candidate:') === 0) {
-								self._checkLocalCandidate(line);
-							}
-						});
-
-						if (!self.assumeSetLocalSuccess) {
-							self.emit('offer', expandedOffer);
-							cb(null, expandedOffer);
-						}
-					},
-					function (err) {
-						self.emit('error', err);
-						cb(err);
-					}
-				);
-			},
-			function (err) {
-				self.emit('error', err);
-				cb(err);
-			},
-			mediaConstraints
-		);
-	};
-
-
-// Process an incoming offer so that ICE may proceed before deciding
-// to answer the request.
-	PeerConnection.prototype.handleOffer = function (offer, cb) {
-		cb = cb || function () {};
-		var self = this;
-		offer.type = 'offer';
-		if (offer.jingle) {
-			if (this.enableChromeNativeSimulcast) {
-				offer.jingle.contents.forEach(function (content) {
-					if (content.name === 'video') {
-						content.application.googConferenceFlag = true;
-					}
-
-				});
-			}
-			if (this.enableMultiStreamHacks) {
-				// add a mixed video stream as first stream
-				offer.jingle.contents.forEach(function (content) {
-					if (content.name === 'video') {
-						var sources = content.application.sources || [];
-						if (sources.length === 0 || sources[0].ssrc !== "3735928559") {
-							sources.unshift({
-								ssrc: "3735928559", // 0xdeadbeef
-								parameters: [
-									{
-										key: "cname",
-										value: "deadbeef"
-									},
-									{
-										key: "msid",
-										value: "mixyourfecintothis please"
-									}
-								]
-							});
-							content.application.sources = sources;
-						}
-					}
-				});
-			}
-			if (self.restrictBandwidth > 0) {
-				if (offer.jingle.contents.length >= 2 && offer.jingle.contents[1].name === 'video') {
-					var content = offer.jingle.contents[1];
-					var hasBw = content.application && content.application.bandwidth && content.application.bandwidth.bandwidth;
-					if (!hasBw) {
-						offer.jingle.contents[1].application.bandwidth = { type: 'AS', bandwidth: self.restrictBandwidth.toString() };
-						offer.sdp = SJJ.toSessionSDP(offer.jingle, {
-							sid: self.config.sdpSessionID,
-							role: self._role(),
-							direction: 'outgoing'
-						});
-					}
-				}
-			}
-			// Save ICE credentials
-			offer.jingle.contents.forEach(function (content) {
-				var transport = content.transport || {};
-				if (transport.ufrag) {
-					self.iceCredentials.remote[content.name] = {
-						ufrag: transport.ufrag,
-						pwd: transport.pwd
-					};
-				}
-			});
-			offer.sdp = SJJ.toSessionSDP(offer.jingle, {
-				sid: self.config.sdpSessionID,
-				role: self._role(),
-				direction: 'incoming'
-			});
-			self.remoteDescription = offer.jingle;
-		}
-		offer.sdp.split('\r\n').forEach(function (line) {
-			if (line.indexOf('a=candidate:') === 0) {
-				self._checkRemoteCandidate(line);
-			}
-		});
-		self.pc.setRemoteDescription(new RTCSessionDescription(offer),
-			function () {
-				cb();
-			},
-			cb
-		);
-	};
-
-// Answer an offer with audio only
-	PeerConnection.prototype.answerAudioOnly = function (cb) {
-		var mediaConstraints = {
-			mandatory: {
-				OfferToReceiveAudio: true,
-				OfferToReceiveVideo: false
-			}
-		};
-		this._answer(mediaConstraints, cb);
-	};
-
-// Answer an offer without offering to recieve
-	PeerConnection.prototype.answerBroadcastOnly = function (cb) {
-		var mediaConstraints = {
-			mandatory: {
-				OfferToReceiveAudio: false,
-				OfferToReceiveVideo: false
-			}
-		};
-		this._answer(mediaConstraints, cb);
-	};
-
-// Answer an offer with given constraints default is audio/video
-	PeerConnection.prototype.answer = function (constraints, cb) {
-		var hasConstraints = arguments.length === 2;
-		var callback = hasConstraints ? cb : constraints;
-		var mediaConstraints = hasConstraints && constraints ? constraints : {
-				mandatory: {
-					OfferToReceiveAudio: true,
-					OfferToReceiveVideo: true
-				}
-			};
-
-		this._answer(mediaConstraints, callback);
-	};
-
-// Process an answer
-	PeerConnection.prototype.handleAnswer = function (answer, cb) {
-		cb = cb || function () {};
-		var self = this;
-		if (answer.jingle) {
-			answer.sdp = SJJ.toSessionSDP(answer.jingle, {
-				sid: self.config.sdpSessionID,
-				role: self._role(),
-				direction: 'incoming'
-			});
-			self.remoteDescription = answer.jingle;
-
-			// Save ICE credentials
-			answer.jingle.contents.forEach(function (content) {
-				var transport = content.transport || {};
-				if (transport.ufrag) {
-					self.iceCredentials.remote[content.name] = {
-						ufrag: transport.ufrag,
-						pwd: transport.pwd
-					};
-				}
-			});
-		}
-		answer.sdp.split('\r\n').forEach(function (line) {
-			if (line.indexOf('a=candidate:') === 0) {
-				self._checkRemoteCandidate(line);
-			}
-		});
-		self.pc.setRemoteDescription(
-			new RTCSessionDescription(answer),
-			function () {
-				if (self.wtFirefox) {
-					window.setTimeout(function () {
-						self.firefoxcandidatebuffer.forEach(function (candidate) {
-							// add candidates later
-							self.pc.addIceCandidate(
-								new RTCIceCandidate(candidate),
-								function () { },
-								function (err) {
-									self.emit('error', err);
-								}
-							);
-							self._checkRemoteCandidate(candidate.candidate);
-						});
-						self.firefoxcandidatebuffer = null;
-					}, self.wtFirefox);
-				}
-				cb(null);
-			},
-			cb
-		);
-	};
-
-// Close the peer connection
-	PeerConnection.prototype.close = function () {
-		this.pc.close();
-
-		this._localDataChannels = [];
-		this._remoteDataChannels = [];
-
-		this.emit('close');
-	};
-
-// Internal code sharing for various types of answer methods
-	PeerConnection.prototype._answer = function (constraints, cb) {
-		cb = cb || function () {};
-		var self = this;
-		if (!this.pc.remoteDescription) {
-			// the old API is used, call handleOffer
-			throw new Error('remoteDescription not set');
-		}
-
-		if (this.pc.signalingState === 'closed') return cb('Already closed');
-
-		self.pc.createAnswer(
-			function (answer) {
-				var sim = [];
-				if (self.enableChromeNativeSimulcast) {
-					// native simulcast part 1: add another SSRC
-					answer.jingle = SJJ.toSessionJSON(answer.sdp, {
-						role: self._role(),
-						direction: 'outgoing'
-					});
-					if (answer.jingle.contents.length >= 2 && answer.jingle.contents[1].name === 'video') {
-						var groups = answer.jingle.contents[1].application.sourceGroups || [];
-						var hasSim = false;
-						groups.forEach(function (group) {
-							if (group.semantics == 'SIM') hasSim = true;
-						});
-						if (!hasSim &&
-							answer.jingle.contents[1].application.sources.length) {
-							var newssrc = JSON.parse(JSON.stringify(answer.jingle.contents[1].application.sources[0]));
-							newssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
-							answer.jingle.contents[1].application.sources.push(newssrc);
-
-							sim.push(answer.jingle.contents[1].application.sources[0].ssrc);
-							sim.push(newssrc.ssrc);
-							groups.push({
-								semantics: 'SIM',
-								sources: sim
-							});
-
-							// also create an RTX one for the SIM one
-							var rtxssrc = JSON.parse(JSON.stringify(newssrc));
-							rtxssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
-							answer.jingle.contents[1].application.sources.push(rtxssrc);
-							groups.push({
-								semantics: 'FID',
-								sources: [newssrc.ssrc, rtxssrc.ssrc]
-							});
-
-							answer.jingle.contents[1].application.sourceGroups = groups;
-							answer.sdp = SJJ.toSessionSDP(answer.jingle, {
-								sid: self.config.sdpSessionID,
-								role: self._role(),
-								direction: 'outgoing'
-							});
-						}
-					}
-				}
-				var expandedAnswer = {
-					type: 'answer',
-					sdp: answer.sdp
-				};
-				if (self.assumeSetLocalSuccess) {
-					// not safe to do when doing simulcast mangling
-					var copy = cloneDeep(expandedAnswer);
-					self.emit('answer', copy);
-					cb(null, copy);
-				}
-				self._candidateBuffer = [];
-				self.pc.setLocalDescription(answer,
-					function () {
-						if (self.config.useJingle) {
-							var jingle = SJJ.toSessionJSON(answer.sdp, {
-								role: self._role(),
-								direction: 'outgoing'
-							});
-							jingle.sid = self.config.sid;
-							self.localDescription = jingle;
-							expandedAnswer.jingle = jingle;
-						}
-						if (self.enableChromeNativeSimulcast) {
-							// native simulcast part 2:
-							// signal multiple tracks to the receiver
-							// for anything in the SIM group
-							if (!expandedAnswer.jingle) {
-								expandedAnswer.jingle = SJJ.toSessionJSON(answer.sdp, {
-									role: self._role(),
-									direction: 'outgoing'
-								});
-							}
-							expandedAnswer.jingle.contents[1].application.sources.forEach(function (source, idx) {
-								// the floor idx/2 is a hack that relies on a particular order
-								// of groups, alternating between sim and rtx
-								source.parameters = source.parameters.map(function (parameter) {
-									if (parameter.key === 'msid') {
-										parameter.value += '-' + Math.floor(idx / 2);
-									}
-									return parameter;
-								});
-							});
-							expandedAnswer.sdp = SJJ.toSessionSDP(expandedAnswer.jingle, {
-								sid: self.sdpSessionID,
-								role: self._role(),
-								direction: 'outgoing'
-							});
-						}
-						expandedAnswer.sdp.split('\r\n').forEach(function (line) {
-							if (line.indexOf('a=candidate:') === 0) {
-								self._checkLocalCandidate(line);
-							}
-						});
-						if (!self.assumeSetLocalSuccess) {
-							var copy = cloneDeep(expandedAnswer);
-							self.emit('answer', copy);
-							cb(null, copy);
-						}
-					},
-					function (err) {
-						self.emit('error', err);
-						cb(err);
-					}
-				);
-			},
-			function (err) {
-				self.emit('error', err);
-				cb(err);
-			},
-			constraints
-		);
-	};
-
-// Internal method for emitting ice candidates on our peer object
-	PeerConnection.prototype._onIce = function (event) {
-		var self = this;
-		if (event.candidate) {
-			if (this.dontSignalCandidates) return;
-			var ice = event.candidate;
-
-			var expandedCandidate = {
-				candidate: {
-					candidate: ice.candidate,
-					sdpMid: ice.sdpMid,
-					sdpMLineIndex: ice.sdpMLineIndex
-				}
-			};
-			this._checkLocalCandidate(ice.candidate);
-
-			var cand = SJJ.toCandidateJSON(ice.candidate);
-
-			var already;
-			var idx;
-			if (this.eliminateDuplicateCandidates && cand.type === 'relay') {
-				// drop candidates with same foundation, component
-				// take local type pref into account so we don't ignore udp
-				// ones when we know about a TCP one. unlikely but...
-				already = this._candidateBuffer.filter(
-					function (c) {
-						return c.type === 'relay';
-					}).map(function (c) {
-						return c.foundation + ':' + c.component;
-					}
-				);
-				idx = already.indexOf(cand.foundation + ':' + cand.component);
-				// remember: local type pref of udp is 0, tcp 1, tls 2
-				if (idx > -1 && ((cand.priority >> 24) >= (already[idx].priority >> 24))) {
-					// drop it, same foundation with higher (worse) type pref
-					return;
-				}
-			}
-			if (this.config.bundlePolicy === 'max-bundle') {
-				// drop candidates which are duplicate for audio/video/data
-				// duplicate means same host/port but different sdpMid
-				already = this._candidateBuffer.filter(
-					function (c) {
-						return cand.type === c.type;
-					}).map(function (cand) {
-						return cand.address + ':' + cand.port;
-					}
-				);
-				idx = already.indexOf(cand.address + ':' + cand.port);
-				if (idx > -1) return;
-			}
-			// also drop rtcp candidates since we know the peer supports RTCP-MUX
-			// this is a workaround until browsers implement this natively
-			if (this.config.rtcpMuxPolicy === 'require' && cand.component === '2') {
-				return;
-			}
-			this._candidateBuffer.push(cand);
-
-			if (self.config.useJingle) {
-				if (!ice.sdpMid) { // firefox doesn't set this
-					if (self.pc.remoteDescription && self.pc.remoteDescription.type === 'offer') {
-						// preserve name from remote
-						ice.sdpMid = self.remoteDescription.contents[ice.sdpMLineIndex].name;
-					} else {
-						ice.sdpMid = self.localDescription.contents[ice.sdpMLineIndex].name;
-					}
-				}
-				if (!self.iceCredentials.local[ice.sdpMid]) {
-					var jingle = SJJ.toSessionJSON(self.pc.localDescription.sdp, {
-						role: self._role(),
-						direction: 'outgoing'
-					});
-					jingle.contents.forEach(function (content) {
-						var transport = content.transport || {};
-						if (transport.ufrag) {
-							self.iceCredentials.local[content.name] = {
-								ufrag: transport.ufrag,
-								pwd: transport.pwd
-							};
-						}
-					});
-				}
-				expandedCandidate.jingle = {
-					contents: [{
-						name: ice.sdpMid,
-						creator: self._role(),
-						transport: {
-							transportType: 'iceUdp',
-							ufrag: self.iceCredentials.local[ice.sdpMid].ufrag,
-							pwd: self.iceCredentials.local[ice.sdpMid].pwd,
-							candidates: [
-								cand
-							]
-						}
-					}]
-				};
-				if (self.batchIceCandidates > 0) {
-					if (self.batchedIceCandidates.length === 0) {
-						window.setTimeout(function () {
-							var contents = {};
-							self.batchedIceCandidates.forEach(function (content) {
-								content = content.contents[0];
-								if (!contents[content.name]) contents[content.name] = content;
-								contents[content.name].transport.candidates.push(content.transport.candidates[0]);
-							});
-							var newCand = {
-								jingle: {
-									contents: []
-								}
-							};
-							Object.keys(contents).forEach(function (name) {
-								newCand.jingle.contents.push(contents[name]);
-							});
-							self.batchedIceCandidates = [];
-							self.emit('ice', newCand);
-						}, self.batchIceCandidates);
-					}
-					self.batchedIceCandidates.push(expandedCandidate.jingle);
-					return;
-				}
-
-			}
-			this.emit('ice', expandedCandidate);
-		} else {
-			this.emit('endOfCandidates');
-		}
-	};
-
-// Internal method for processing a new data channel being added by the
-// other peer.
-	PeerConnection.prototype._onDataChannel = function (event) {
-		// make sure we keep a reference so this doesn't get garbage collected
-		var channel = event.channel;
-		this._remoteDataChannels.push(channel);
-
-		this.emit('addChannel', channel);
-	};
-
-// Create a data channel spec reference:
-// http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannelInit
-	PeerConnection.prototype.createDataChannel = function (name, opts) {
-		var channel = this.pc.createDataChannel(name, opts);
-
-		// make sure we keep a reference so this doesn't get garbage collected
-		this._localDataChannels.push(channel);
-
-		return channel;
-	};
-
-	PeerConnection.prototype.getStats = function (cb) {
-		this.pc.getStats(null,
-			function (res) {
-				cb(null, res);
-			},
-			function (err) {
-				cb(err);
-			}
-		);
-	};
-
-	module.exports = PeerConnection;
-
-},{"lodash.clonedeep":47,"sdp-jingle-json":57,"traceablepeerconnection":76,"util":89,"webrtc-adapter":90,"wildemitter":100}],57:[function(require,module,exports){
-	var toSDP = require('./lib/tosdp');
-	var toJSON = require('./lib/tojson');
-
-
-// Converstion from JSON to SDP
-
-	exports.toIncomingSDPOffer = function (session) {
-		return toSDP.toSessionSDP(session, {
-			role: 'responder',
-			direction: 'incoming'
-		});
-	};
-	exports.toOutgoingSDPOffer = function (session) {
-		return toSDP.toSessionSDP(session, {
-			role: 'initiator',
-			direction: 'outgoing'
-		});
-	};
-	exports.toIncomingSDPAnswer = function (session) {
-		return toSDP.toSessionSDP(session, {
-			role: 'initiator',
-			direction: 'incoming'
-		});
-	};
-	exports.toOutgoingSDPAnswer = function (session) {
-		return toSDP.toSessionSDP(session, {
-			role: 'responder',
-			direction: 'outgoing'
-		});
-	};
-	exports.toIncomingMediaSDPOffer = function (media) {
-		return toSDP.toMediaSDP(media, {
-			role: 'responder',
-			direction: 'incoming'
-		});
-	};
-	exports.toOutgoingMediaSDPOffer = function (media) {
-		return toSDP.toMediaSDP(media, {
-			role: 'initiator',
-			direction: 'outgoing'
-		});
-	};
-	exports.toIncomingMediaSDPAnswer = function (media) {
-		return toSDP.toMediaSDP(media, {
-			role: 'initiator',
-			direction: 'incoming'
-		});
-	};
-	exports.toOutgoingMediaSDPAnswer = function (media) {
-		return toSDP.toMediaSDP(media, {
-			role: 'responder',
-			direction: 'outgoing'
-		});
-	};
-	exports.toCandidateSDP = toSDP.toCandidateSDP;
-	exports.toMediaSDP = toSDP.toMediaSDP;
-	exports.toSessionSDP = toSDP.toSessionSDP;
-
-
-// Conversion from SDP to JSON
-
-	exports.toIncomingJSONOffer = function (sdp, creators) {
-		return toJSON.toSessionJSON(sdp, {
-			role: 'responder',
-			direction: 'incoming',
-			creators: creators
-		});
-	};
-	exports.toOutgoingJSONOffer = function (sdp, creators) {
-		return toJSON.toSessionJSON(sdp, {
-			role: 'initiator',
-			direction: 'outgoing',
-			creators: creators
-		});
-	};
-	exports.toIncomingJSONAnswer = function (sdp, creators) {
-		return toJSON.toSessionJSON(sdp, {
-			role: 'initiator',
-			direction: 'incoming',
-			creators: creators
-		});
-	};
-	exports.toOutgoingJSONAnswer = function (sdp, creators) {
-		return toJSON.toSessionJSON(sdp, {
-			role: 'responder',
-			direction: 'outgoing',
-			creators: creators
-		});
-	};
-	exports.toIncomingMediaJSONOffer = function (sdp, creator) {
-		return toJSON.toMediaJSON(sdp, {
-			role: 'responder',
-			direction: 'incoming',
-			creator: creator
-		});
-	};
-	exports.toOutgoingMediaJSONOffer = function (sdp, creator) {
-		return toJSON.toMediaJSON(sdp, {
-			role: 'initiator',
-			direction: 'outgoing',
-			creator: creator
-		});
-	};
-	exports.toIncomingMediaJSONAnswer = function (sdp, creator) {
-		return toJSON.toMediaJSON(sdp, {
-			role: 'initiator',
-			direction: 'incoming',
-			creator: creator
-		});
-	};
-	exports.toOutgoingMediaJSONAnswer = function (sdp, creator) {
-		return toJSON.toMediaJSON(sdp, {
-			role: 'responder',
-			direction: 'outgoing',
-			creator: creator
-		});
-	};
-	exports.toCandidateJSON = toJSON.toCandidateJSON;
-	exports.toMediaJSON = toJSON.toMediaJSON;
-	exports.toSessionJSON = toJSON.toSessionJSON;
-
-},{"./lib/tojson":60,"./lib/tosdp":61}],58:[function(require,module,exports){
-	exports.lines = function (sdp) {
-		return sdp.split('\r\n').filter(function (line) {
-			return line.length > 0;
-		});
-	};
-
-	exports.findLine = function (prefix, mediaLines, sessionLines) {
-		var prefixLength = prefix.length;
-		for (var i = 0; i < mediaLines.length; i++) {
-			if (mediaLines[i].substr(0, prefixLength) === prefix) {
-				return mediaLines[i];
-			}
-		}
-		// Continue searching in parent session section
-		if (!sessionLines) {
-			return false;
-		}
-
-		for (var j = 0; j < sessionLines.length; j++) {
-			if (sessionLines[j].substr(0, prefixLength) === prefix) {
-				return sessionLines[j];
-			}
-		}
-
-		return false;
-	};
-
-	exports.findLines = function (prefix, mediaLines, sessionLines) {
-		var results = [];
-		var prefixLength = prefix.length;
-		for (var i = 0; i < mediaLines.length; i++) {
-			if (mediaLines[i].substr(0, prefixLength) === prefix) {
-				results.push(mediaLines[i]);
-			}
-		}
-		if (results.length || !sessionLines) {
-			return results;
-		}
-		for (var j = 0; j < sessionLines.length; j++) {
-			if (sessionLines[j].substr(0, prefixLength) === prefix) {
-				results.push(sessionLines[j]);
-			}
-		}
-		return results;
-	};
-
-	exports.mline = function (line) {
-		var parts = line.substr(2).split(' ');
-		var parsed = {
-			media: parts[0],
-			port: parts[1],
-			proto: parts[2],
-			formats: []
-		};
-		for (var i = 3; i < parts.length; i++) {
-			if (parts[i]) {
-				parsed.formats.push(parts[i]);
-			}
-		}
-		return parsed;
-	};
-
-	exports.rtpmap = function (line) {
-		var parts = line.substr(9).split(' ');
-		var parsed = {
-			id: parts.shift()
-		};
-
-		parts = parts[0].split('/');
-
-		parsed.name = parts[0];
-		parsed.clockrate = parts[1];
-		parsed.channels = parts.length == 3 ? parts[2] : '1';
-		return parsed;
-	};
-
-	exports.sctpmap = function (line) {
-		// based on -05 draft
-		var parts = line.substr(10).split(' ');
-		var parsed = {
-			number: parts.shift(),
-			protocol: parts.shift(),
-			streams: parts.shift()
-		};
-		return parsed;
-	};
-
-
-	exports.fmtp = function (line) {
-		var kv, key, value;
-		var parts = line.substr(line.indexOf(' ') + 1).split(';');
-		var parsed = [];
-		for (var i = 0; i < parts.length; i++) {
-			kv = parts[i].split('=');
-			key = kv[0].trim();
-			value = kv[1];
-			if (key && value) {
-				parsed.push({key: key, value: value});
-			} else if (key) {
-				parsed.push({key: '', value: key});
-			}
-		}
-		return parsed;
-	};
-
-	exports.crypto = function (line) {
-		var parts = line.substr(9).split(' ');
-		var parsed = {
-			tag: parts[0],
-			cipherSuite: parts[1],
-			keyParams: parts[2],
-			sessionParams: parts.slice(3).join(' ')
-		};
-		return parsed;
-	};
-
-	exports.fingerprint = function (line) {
-		var parts = line.substr(14).split(' ');
-		return {
-			hash: parts[0],
-			value: parts[1]
-		};
-	};
-
-	exports.extmap = function (line) {
-		var parts = line.substr(9).split(' ');
-		var parsed = {};
-
-		var idpart = parts.shift();
-		var sp = idpart.indexOf('/');
-		if (sp >= 0) {
-			parsed.id = idpart.substr(0, sp);
-			parsed.senders = idpart.substr(sp + 1);
-		} else {
-			parsed.id = idpart;
-			parsed.senders = 'sendrecv';
-		}
-
-		parsed.uri = parts.shift() || '';
-
-		return parsed;
-	};
-
-	exports.rtcpfb = function (line) {
-		var parts = line.substr(10).split(' ');
-		var parsed = {};
-		parsed.id = parts.shift();
-		parsed.type = parts.shift();
-		if (parsed.type === 'trr-int') {
-			parsed.value = parts.shift();
-		} else {
-			parsed.subtype = parts.shift() || '';
-		}
-		parsed.parameters = parts;
-		return parsed;
-	};
-
-	exports.candidate = function (line) {
-		var parts;
-		if (line.indexOf('a=candidate:') === 0) {
-			parts = line.substring(12).split(' ');
-		} else { // no a=candidate
-			parts = line.substring(10).split(' ');
-		}
-
-		var candidate = {
-			foundation: parts[0],
-			component: parts[1],
-			protocol: parts[2].toLowerCase(),
-			priority: parts[3],
-			ip: parts[4],
-			port: parts[5],
-			// skip parts[6] == 'typ'
-			type: parts[7],
-			generation: '0'
-		};
-
-		for (var i = 8; i < parts.length; i += 2) {
-			if (parts[i] === 'raddr') {
-				candidate.relAddr = parts[i + 1];
-			} else if (parts[i] === 'rport') {
-				candidate.relPort = parts[i + 1];
-			} else if (parts[i] === 'generation') {
-				candidate.generation = parts[i + 1];
-			} else if (parts[i] === 'tcptype') {
-				candidate.tcpType = parts[i + 1];
-			}
-		}
-
-		candidate.network = '1';
-
-		return candidate;
-	};
-
-	exports.sourceGroups = function (lines) {
-		var parsed = [];
-		for (var i = 0; i < lines.length; i++) {
-			var parts = lines[i].substr(13).split(' ');
-			parsed.push({
-				semantics: parts.shift(),
-				sources: parts
-			});
-		}
-		return parsed;
-	};
-
-	exports.sources = function (lines) {
-		// http://tools.ietf.org/html/rfc5576
-		var parsed = [];
-		var sources = {};
-		for (var i = 0; i < lines.length; i++) {
-			var parts = lines[i].substr(7).split(' ');
-			var ssrc = parts.shift();
-
-			if (!sources[ssrc]) {
-				var source = {
-					ssrc: ssrc,
-					parameters: []
-				};
-				parsed.push(source);
-
-				// Keep an index
-				sources[ssrc] = source;
-			}
-
-			parts = parts.join(' ').split(':');
-			var attribute = parts.shift();
-			var value = parts.join(':') || null;
-
-			sources[ssrc].parameters.push({
-				key: attribute,
-				value: value
-			});
-		}
-
-		return parsed;
-	};
-
-	exports.groups = function (lines) {
-		// http://tools.ietf.org/html/rfc5888
-		var parsed = [];
-		var parts;
-		for (var i = 0; i < lines.length; i++) {
-			parts = lines[i].substr(8).split(' ');
-			parsed.push({
-				semantics: parts.shift(),
-				contents: parts
-			});
-		}
-		return parsed;
-	};
-
-	exports.bandwidth = function (line) {
-		var parts = line.substr(2).split(':');
-		var parsed = {};
-		parsed.type = parts.shift();
-		parsed.bandwidth = parts.shift();
-		return parsed;
-	};
-
-	exports.msid = function (line) {
-		var data = line.substr(7);
-		var parts = data.split(' ');
-		return {
-			msid: data,
-			mslabel: parts[0],
-			label: parts[1]
-		};
-	};
-
-},{}],59:[function(require,module,exports){
-	module.exports = {
-		initiator: {
-			incoming: {
-				initiator: 'recvonly',
-				responder: 'sendonly',
-				both: 'sendrecv',
-				none: 'inactive',
-				recvonly: 'initiator',
-				sendonly: 'responder',
-				sendrecv: 'both',
-				inactive: 'none'
-			},
-			outgoing: {
-				initiator: 'sendonly',
-				responder: 'recvonly',
-				both: 'sendrecv',
-				none: 'inactive',
-				recvonly: 'responder',
-				sendonly: 'initiator',
-				sendrecv: 'both',
-				inactive: 'none'
-			}
-		},
-		responder: {
-			incoming: {
-				initiator: 'sendonly',
-				responder: 'recvonly',
-				both: 'sendrecv',
-				none: 'inactive',
-				recvonly: 'responder',
-				sendonly: 'initiator',
-				sendrecv: 'both',
-				inactive: 'none'
-			},
-			outgoing: {
-				initiator: 'recvonly',
-				responder: 'sendonly',
-				both: 'sendrecv',
-				none: 'inactive',
-				recvonly: 'initiator',
-				sendonly: 'responder',
-				sendrecv: 'both',
-				inactive: 'none'
-			}
-		}
-	};
-
-},{}],60:[function(require,module,exports){
-	var SENDERS = require('./senders');
-	var parsers = require('./parsers');
-	var idCounter = Math.random();
-
-
-	exports._setIdCounter = function (counter) {
-		idCounter = counter;
-	};
-
-	exports.toSessionJSON = function (sdp, opts) {
-		var i;
-		var creators = opts.creators || [];
-		var role = opts.role || 'initiator';
-		var direction = opts.direction || 'outgoing';
-
-
-		// Divide the SDP into session and media sections.
-		var media = sdp.split('\r\nm=');
-		for (i = 1; i < media.length; i++) {
-			media[i] = 'm=' + media[i];
-			if (i !== media.length - 1) {
-				media[i] += '\r\n';
-			}
-		}
-		var session = media.shift() + '\r\n';
-		var sessionLines = parsers.lines(session);
-		var parsed = {};
-
-		var contents = [];
-		for (i = 0; i < media.length; i++) {
-			contents.push(exports.toMediaJSON(media[i], session, {
-				role: role,
-				direction: direction,
-				creator: creators[i] || 'initiator'
-			}));
-		}
-		parsed.contents = contents;
-
-		var groupLines = parsers.findLines('a=group:', sessionLines);
-		if (groupLines.length) {
-			parsed.groups = parsers.groups(groupLines);
-		}
-
-		return parsed;
-	};
-
-	exports.toMediaJSON = function (media, session, opts) {
-		var creator = opts.creator || 'initiator';
-		var role = opts.role || 'initiator';
-		var direction = opts.direction || 'outgoing';
-
-		var lines = parsers.lines(media);
-		var sessionLines = parsers.lines(session);
-		var mline = parsers.mline(lines[0]);
-
-		var content = {
-			creator: creator,
-			name: mline.media,
-			application: {
-				applicationType: 'rtp',
-				media: mline.media,
-				payloads: [],
-				encryption: [],
-				feedback: [],
-				headerExtensions: []
-			},
-			transport: {
-				transportType: 'iceUdp',
-				candidates: [],
-				fingerprints: []
-			}
-		};
-		if (mline.media == 'application') {
-			// FIXME: the description is most likely to be independent
-			// of the SDP and should be processed by other parts of the library
-			content.application = {
-				applicationType: 'datachannel'
-			};
-			content.transport.sctp = [];
-		}
-		var desc = content.application;
-		var trans = content.transport;
-
-		// If we have a mid, use that for the content name instead.
-		var mid = parsers.findLine('a=mid:', lines);
-		if (mid) {
-			content.name = mid.substr(6);
-		}
-
-		if (parsers.findLine('a=sendrecv', lines, sessionLines)) {
-			content.senders = 'both';
-		} else if (parsers.findLine('a=sendonly', lines, sessionLines)) {
-			content.senders = SENDERS[role][direction].sendonly;
-		} else if (parsers.findLine('a=recvonly', lines, sessionLines)) {
-			content.senders = SENDERS[role][direction].recvonly;
-		} else if (parsers.findLine('a=inactive', lines, sessionLines)) {
-			content.senders = 'none';
-		}
-
-		if (desc.applicationType == 'rtp') {
-			var bandwidth = parsers.findLine('b=', lines);
-			if (bandwidth) {
-				desc.bandwidth = parsers.bandwidth(bandwidth);
-			}
-
-			var ssrc = parsers.findLine('a=ssrc:', lines);
-			if (ssrc) {
-				desc.ssrc = ssrc.substr(7).split(' ')[0];
-			}
-
-			var rtpmapLines = parsers.findLines('a=rtpmap:', lines);
-			rtpmapLines.forEach(function (line) {
-				var payload = parsers.rtpmap(line);
-				payload.parameters = [];
-				payload.feedback = [];
-
-				var fmtpLines = parsers.findLines('a=fmtp:' + payload.id, lines);
-				// There should only be one fmtp line per payload
-				fmtpLines.forEach(function (line) {
-					payload.parameters = parsers.fmtp(line);
-				});
-
-				var fbLines = parsers.findLines('a=rtcp-fb:' + payload.id, lines);
-				fbLines.forEach(function (line) {
-					payload.feedback.push(parsers.rtcpfb(line));
-				});
-
-				desc.payloads.push(payload);
-			});
-
-			var cryptoLines = parsers.findLines('a=crypto:', lines, sessionLines);
-			cryptoLines.forEach(function (line) {
-				desc.encryption.push(parsers.crypto(line));
-			});
-
-			if (parsers.findLine('a=rtcp-mux', lines)) {
-				desc.mux = true;
-			}
-
-			var fbLines = parsers.findLines('a=rtcp-fb:*', lines);
-			fbLines.forEach(function (line) {
-				desc.feedback.push(parsers.rtcpfb(line));
-			});
-
-			var extLines = parsers.findLines('a=extmap:', lines);
-			extLines.forEach(function (line) {
-				var ext = parsers.extmap(line);
-
-				ext.senders = SENDERS[role][direction][ext.senders];
-
-				desc.headerExtensions.push(ext);
-			});
-
-			var ssrcGroupLines = parsers.findLines('a=ssrc-group:', lines);
-			desc.sourceGroups = parsers.sourceGroups(ssrcGroupLines || []);
-
-			var ssrcLines = parsers.findLines('a=ssrc:', lines);
-			var sources = desc.sources = parsers.sources(ssrcLines || []);
-
-			var msidLine = parsers.findLine('a=msid:', lines);
-			if (msidLine) {
-				var msid = parsers.msid(msidLine);
-				['msid', 'mslabel', 'label'].forEach(function (key) {
-					for (var i = 0; i < sources.length; i++) {
-						var found = false;
-						for (var j = 0; j < sources[i].parameters.length; j++) {
-							if (sources[i].parameters[j].key === key) {
-								found = true;
-							}
-						}
-						if (!found) {
-							sources[i].parameters.push({ key: key, value: msid[key] });
-						}
-					}
-				});
-			}
-
-			if (parsers.findLine('a=x-google-flag:conference', lines, sessionLines)) {
-				desc.googConferenceFlag = true;
-			}
-		}
-
-		// transport specific attributes
-		var fingerprintLines = parsers.findLines('a=fingerprint:', lines, sessionLines);
-		var setup = parsers.findLine('a=setup:', lines, sessionLines);
-		fingerprintLines.forEach(function (line) {
-			var fp = parsers.fingerprint(line);
-			if (setup) {
-				fp.setup = setup.substr(8);
-			}
-			trans.fingerprints.push(fp);
-		});
-
-		var ufragLine = parsers.findLine('a=ice-ufrag:', lines, sessionLines);
-		var pwdLine = parsers.findLine('a=ice-pwd:', lines, sessionLines);
-		if (ufragLine && pwdLine) {
-			trans.ufrag = ufragLine.substr(12);
-			trans.pwd = pwdLine.substr(10);
-			trans.candidates = [];
-
-			var candidateLines = parsers.findLines('a=candidate:', lines, sessionLines);
-			candidateLines.forEach(function (line) {
-				trans.candidates.push(exports.toCandidateJSON(line));
-			});
-		}
-
-		if (desc.applicationType == 'datachannel') {
-			var sctpmapLines = parsers.findLines('a=sctpmap:', lines);
-			sctpmapLines.forEach(function (line) {
-				var sctp = parsers.sctpmap(line);
-				trans.sctp.push(sctp);
-			});
-		}
-
-		return content;
-	};
-
-	exports.toCandidateJSON = function (line) {
-		var candidate = parsers.candidate(line.split('\r\n')[0]);
-		candidate.id = (idCounter++).toString(36).substr(0, 12);
-		return candidate;
-	};
-
-},{"./parsers":58,"./senders":59}],61:[function(require,module,exports){
-	var SENDERS = require('./senders');
-
-
-	exports.toSessionSDP = function (session, opts) {
-		var role = opts.role || 'initiator';
-		var direction = opts.direction || 'outgoing';
-		var sid = opts.sid || session.sid || Date.now();
-		var time = opts.time || Date.now();
-
-		var sdp = [
-			'v=0',
-			'o=- ' + sid + ' ' + time + ' IN IP4 0.0.0.0',
-			's=-',
-			't=0 0'
-		];
-
-		var contents = session.contents || [];
-		var hasSources = false;
-		contents.forEach(function (content) {
-			if (content.application.sources &&
-				content.application.sources.length) {
-				hasSources = true;
-			}
-		});
-
-		if (hasSources) {
-			sdp.push('a=msid-semantic: WMS *');
-		}
-
-		var groups = session.groups || [];
-		groups.forEach(function (group) {
-			sdp.push('a=group:' + group.semantics + ' ' + group.contents.join(' '));
-		});
-
-
-		contents.forEach(function (content) {
-			sdp.push(exports.toMediaSDP(content, opts));
-		});
-
-		return sdp.join('\r\n') + '\r\n';
-	};
-
-	exports.toMediaSDP = function (content, opts) {
-		var sdp = [];
-
-		var role = opts.role || 'initiator';
-		var direction = opts.direction || 'outgoing';
-
-		var desc = content.application;
-		var transport = content.transport;
-		var payloads = desc.payloads || [];
-		var fingerprints = (transport && transport.fingerprints) || [];
-
-		var mline = [];
-		if (desc.applicationType == 'datachannel') {
-			mline.push('application');
-			mline.push('1');
-			mline.push('DTLS/SCTP');
-			if (transport.sctp) {
-				transport.sctp.forEach(function (map) {
-					mline.push(map.number);
-				});
-			}
-		} else {
-			mline.push(desc.media);
-			mline.push('1');
-			if (fingerprints.length > 0) {
-				mline.push('UDP/TLS/RTP/SAVPF');
-			} else if (desc.encryption && desc.encryption.length > 0) {
-				mline.push('RTP/SAVPF');
-			} else {
-				mline.push('RTP/AVPF');
-			}
-			payloads.forEach(function (payload) {
-				mline.push(payload.id);
-			});
-		}
-
-
-		sdp.push('m=' + mline.join(' '));
-
-		sdp.push('c=IN IP4 0.0.0.0');
-		if (desc.bandwidth && desc.bandwidth.type && desc.bandwidth.bandwidth) {
-			sdp.push('b=' + desc.bandwidth.type + ':' + desc.bandwidth.bandwidth);
-		}
-		if (desc.applicationType == 'rtp') {
-			sdp.push('a=rtcp:1 IN IP4 0.0.0.0');
-		}
-
-		if (transport) {
-			if (transport.ufrag) {
-				sdp.push('a=ice-ufrag:' + transport.ufrag);
-			}
-			if (transport.pwd) {
-				sdp.push('a=ice-pwd:' + transport.pwd);
-			}
-
-			var pushedSetup = false;
-			fingerprints.forEach(function (fingerprint) {
-				sdp.push('a=fingerprint:' + fingerprint.hash + ' ' + fingerprint.value);
-				if (fingerprint.setup && !pushedSetup) {
-					sdp.push('a=setup:' + fingerprint.setup);
-				}
-			});
-
-			if (transport.sctp) {
-				transport.sctp.forEach(function (map) {
-					sdp.push('a=sctpmap:' + map.number + ' ' + map.protocol + ' ' + map.streams);
-				});
-			}
-		}
-
-		if (desc.applicationType == 'rtp') {
-			sdp.push('a=' + (SENDERS[role][direction][content.senders] || 'sendrecv'));
-		}
-		sdp.push('a=mid:' + content.name);
-
-		if (desc.sources && desc.sources.length) {
-			(desc.sources[0].parameters || []).forEach(function (param) {
-				if (param.key === 'msid') {
-					sdp.push('a=msid:' + param.value);
-				}
-			});
-		}
-
-		if (desc.mux) {
-			sdp.push('a=rtcp-mux');
-		}
-
-		var encryption = desc.encryption || [];
-		encryption.forEach(function (crypto) {
-			sdp.push('a=crypto:' + crypto.tag + ' ' + crypto.cipherSuite + ' ' + crypto.keyParams + (crypto.sessionParams ? ' ' + crypto.sessionParams : ''));
-		});
-		if (desc.googConferenceFlag) {
-			sdp.push('a=x-google-flag:conference');
-		}
-
-		payloads.forEach(function (payload) {
-			var rtpmap = 'a=rtpmap:' + payload.id + ' ' + payload.name + '/' + payload.clockrate;
-			if (payload.channels && payload.channels != '1') {
-				rtpmap += '/' + payload.channels;
-			}
-			sdp.push(rtpmap);
-
-			if (payload.parameters && payload.parameters.length) {
-				var fmtp = ['a=fmtp:' + payload.id];
-				var parameters = [];
-				payload.parameters.forEach(function (param) {
-					parameters.push((param.key ? param.key + '=' : '') + param.value);
-				});
-				fmtp.push(parameters.join(';'));
-				sdp.push(fmtp.join(' '));
-			}
-
-			if (payload.feedback) {
-				payload.feedback.forEach(function (fb) {
-					if (fb.type === 'trr-int') {
-						sdp.push('a=rtcp-fb:' + payload.id + ' trr-int ' + (fb.value ? fb.value : '0'));
-					} else {
-						sdp.push('a=rtcp-fb:' + payload.id + ' ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
-					}
-				});
-			}
-		});
-
-		if (desc.feedback) {
-			desc.feedback.forEach(function (fb) {
-				if (fb.type === 'trr-int') {
-					sdp.push('a=rtcp-fb:* trr-int ' + (fb.value ? fb.value : '0'));
-				} else {
-					sdp.push('a=rtcp-fb:* ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
-				}
-			});
-		}
-
-		var hdrExts = desc.headerExtensions || [];
-		hdrExts.forEach(function (hdr) {
-			sdp.push('a=extmap:' + hdr.id + (hdr.senders ? '/' + SENDERS[role][direction][hdr.senders] : '') + ' ' + hdr.uri);
-		});
-
-		var ssrcGroups = desc.sourceGroups || [];
-		ssrcGroups.forEach(function (ssrcGroup) {
-			sdp.push('a=ssrc-group:' + ssrcGroup.semantics + ' ' + ssrcGroup.sources.join(' '));
-		});
-
-		var ssrcs = desc.sources || [];
-		ssrcs.forEach(function (ssrc) {
-			for (var i = 0; i < ssrc.parameters.length; i++) {
-				var param = ssrc.parameters[i];
-				sdp.push('a=ssrc:' + (ssrc.ssrc || desc.ssrc) + ' ' + param.key + (param.value ? (':' + param.value) : ''));
-			}
-		});
-
-		var candidates = transport.candidates || [];
-		candidates.forEach(function (candidate) {
-			sdp.push(exports.toCandidateSDP(candidate));
-		});
-
-		return sdp.join('\r\n');
-	};
-
-	exports.toCandidateSDP = function (candidate) {
-		var sdp = [];
-
-		sdp.push(candidate.foundation);
-		sdp.push(candidate.component);
-		sdp.push(candidate.protocol.toUpperCase());
-		sdp.push(candidate.priority);
-		sdp.push(candidate.ip);
-		sdp.push(candidate.port);
-
-		var type = candidate.type;
-		sdp.push('typ');
-		sdp.push(type);
-		if (type === 'srflx' || type === 'prflx' || type === 'relay') {
-			if (candidate.relAddr && candidate.relPort) {
-				sdp.push('raddr');
-				sdp.push(candidate.relAddr);
-				sdp.push('rport');
-				sdp.push(candidate.relPort);
-			}
-		}
-		if (candidate.tcpType && candidate.protocol.toUpperCase() == 'TCP') {
-			sdp.push('tcptype');
-			sdp.push(candidate.tcpType);
-		}
-
-		sdp.push('generation');
-		sdp.push(candidate.generation || '0');
-
-		// FIXME: apparently this is wrong per spec
-		// but then, we need this when actually putting this into
-		// SDP so it's going to stay.
-		// decision needs to be revisited when browsers dont
-		// accept this any longer
-		return 'a=candidate:' + sdp.join(' ');
-	};
-
-},{"./senders":59}],62:[function(require,module,exports){
-	/* eslint-env node */
-	'use strict';
-
-// SDP helpers.
-	var SDPUtils = {};
-
-// Generate an alphanumeric identifier for cname or mids.
-// TODO: use UUIDs instead? https://gist.github.com/jed/982883
-	SDPUtils.generateIdentifier = function() {
-		return Math.random().toString(36).substr(2, 10);
-	};
-
-// The RTCP CNAME used by all peerconnections from the same JS.
-	SDPUtils.localCName = SDPUtils.generateIdentifier();
-
-// Splits SDP into lines, dealing with both CRLF and LF.
-	SDPUtils.splitLines = function(blob) {
-		return blob.trim().split('\n').map(function(line) {
-			return line.trim();
-		});
-	};
-// Splits SDP into sessionpart and mediasections. Ensures CRLF.
-	SDPUtils.splitSections = function(blob) {
-		var parts = blob.split('\nm=');
-		return parts.map(function(part, index) {
-			return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
-		});
-	};
-
-// Returns lines that start with a certain prefix.
-	SDPUtils.matchPrefix = function(blob, prefix) {
-		return SDPUtils.splitLines(blob).filter(function(line) {
-			return line.indexOf(prefix) === 0;
-		});
-	};
-
-// Parses an ICE candidate line. Sample input:
-// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
-// rport 55996"
-	SDPUtils.parseCandidate = function(line) {
-		var parts;
-		// Parse both variants.
-		if (line.indexOf('a=candidate:') === 0) {
-			parts = line.substring(12).split(' ');
-		} else {
-			parts = line.substring(10).split(' ');
-		}
-
-		var candidate = {
-			foundation: parts[0],
-			component: parts[1],
-			protocol: parts[2].toLowerCase(),
-			priority: parseInt(parts[3], 10),
-			ip: parts[4],
-			port: parseInt(parts[5], 10),
-			// skip parts[6] == 'typ'
-			type: parts[7]
-		};
-
-		for (var i = 8; i < parts.length; i += 2) {
-			switch (parts[i]) {
-				case 'raddr':
-					candidate.relatedAddress = parts[i + 1];
-					break;
-				case 'rport':
-					candidate.relatedPort = parseInt(parts[i + 1], 10);
-					break;
-				case 'tcptype':
-					candidate.tcpType = parts[i + 1];
-					break;
-				default: // Unknown extensions are silently ignored.
-					break;
-			}
-		}
-		return candidate;
-	};
-
-// Translates a candidate object into SDP candidate attribute.
-	SDPUtils.writeCandidate = function(candidate) {
-		var sdp = [];
-		sdp.push(candidate.foundation);
-		sdp.push(candidate.component);
-		sdp.push(candidate.protocol.toUpperCase());
-		sdp.push(candidate.priority);
-		sdp.push(candidate.ip);
-		sdp.push(candidate.port);
-
-		var type = candidate.type;
-		sdp.push('typ');
-		sdp.push(type);
-		if (type !== 'host' && candidate.relatedAddress &&
-			candidate.relatedPort) {
-			sdp.push('raddr');
-			sdp.push(candidate.relatedAddress); // was: relAddr
-			sdp.push('rport');
-			sdp.push(candidate.relatedPort); // was: relPort
-		}
-		if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
-			sdp.push('tcptype');
-			sdp.push(candidate.tcpType);
-		}
-		return 'candidate:' + sdp.join(' ');
-	};
-
-// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
-// a=rtpmap:111 opus/48000/2
-	SDPUtils.parseRtpMap = function(line) {
-		var parts = line.substr(9).split(' ');
-		var parsed = {
-			payloadType: parseInt(parts.shift(), 10) // was: id
-		};
-
-		parts = parts[0].split('/');
-
-		parsed.name = parts[0];
-		parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
-		// was: channels
-		parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
-		return parsed;
-	};
-
-// Generate an a=rtpmap line from RTCRtpCodecCapability or
-// RTCRtpCodecParameters.
-	SDPUtils.writeRtpMap = function(codec) {
-		var pt = codec.payloadType;
-		if (codec.preferredPayloadType !== undefined) {
-			pt = codec.preferredPayloadType;
-		}
-		return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
-			(codec.numChannels !== 1 ? '/' + codec.numChannels : '') + '\r\n';
-	};
-
-// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
-// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
-	SDPUtils.parseExtmap = function(line) {
-		var parts = line.substr(9).split(' ');
-		return {
-			id: parseInt(parts[0], 10),
-			uri: parts[1]
-		};
-	};
-
-// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
-// RTCRtpHeaderExtension.
-	SDPUtils.writeExtmap = function(headerExtension) {
-		return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
-			' ' + headerExtension.uri + '\r\n';
-	};
-
-// Parses an ftmp line, returns dictionary. Sample input:
-// a=fmtp:96 vbr=on;cng=on
-// Also deals with vbr=on; cng=on
-	SDPUtils.parseFmtp = function(line) {
-		var parsed = {};
-		var kv;
-		var parts = line.substr(line.indexOf(' ') + 1).split(';');
-		for (var j = 0; j < parts.length; j++) {
-			kv = parts[j].trim().split('=');
-			parsed[kv[0].trim()] = kv[1];
-		}
-		return parsed;
-	};
-
-// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
-	SDPUtils.writeFmtp = function(codec) {
-		var line = '';
-		var pt = codec.payloadType;
-		if (codec.preferredPayloadType !== undefined) {
-			pt = codec.preferredPayloadType;
-		}
-		if (codec.parameters && Object.keys(codec.parameters).length) {
-			var params = [];
-			Object.keys(codec.parameters).forEach(function(param) {
-				params.push(param + '=' + codec.parameters[param]);
-			});
-			line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
-		}
-		return line;
-	};
-
-// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
-// a=rtcp-fb:98 nack rpsi
-	SDPUtils.parseRtcpFb = function(line) {
-		var parts = line.substr(line.indexOf(' ') + 1).split(' ');
-		return {
-			type: parts.shift(),
-			parameter: parts.join(' ')
-		};
-	};
-// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
-	SDPUtils.writeRtcpFb = function(codec) {
-		var lines = '';
-		var pt = codec.payloadType;
-		if (codec.preferredPayloadType !== undefined) {
-			pt = codec.preferredPayloadType;
-		}
-		if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
-			// FIXME: special handling for trr-int?
-			codec.rtcpFeedback.forEach(function(fb) {
-				lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
-					(fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
-					'\r\n';
-			});
-		}
-		return lines;
-	};
-
-// Parses an RFC 5576 ssrc media attribute. Sample input:
-// a=ssrc:3735928559 cname:something
-	SDPUtils.parseSsrcMedia = function(line) {
-		var sp = line.indexOf(' ');
-		var parts = {
-			ssrc: parseInt(line.substr(7, sp - 7), 10)
-		};
-		var colon = line.indexOf(':', sp);
-		if (colon > -1) {
-			parts.attribute = line.substr(sp + 1, colon - sp - 1);
-			parts.value = line.substr(colon + 1);
-		} else {
-			parts.attribute = line.substr(sp + 1);
-		}
-		return parts;
-	};
-
-// Extracts DTLS parameters from SDP media section or sessionpart.
-// FIXME: for consistency with other functions this should only
-//   get the fingerprint line as input. See also getIceParameters.
-	SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
-		var lines = SDPUtils.splitLines(mediaSection);
-		// Search in session part, too.
-		lines = lines.concat(SDPUtils.splitLines(sessionpart));
-		var fpLine = lines.filter(function(line) {
-			return line.indexOf('a=fingerprint:') === 0;
-		})[0].substr(14);
-		// Note: a=setup line is ignored since we use the 'auto' role.
-		var dtlsParameters = {
-			role: 'auto',
-			fingerprints: [{
-				algorithm: fpLine.split(' ')[0],
-				value: fpLine.split(' ')[1]
-			}]
-		};
-		return dtlsParameters;
-	};
-
-// Serializes DTLS parameters to SDP.
-	SDPUtils.writeDtlsParameters = function(params, setupType) {
-		var sdp = 'a=setup:' + setupType + '\r\n';
-		params.fingerprints.forEach(function(fp) {
-			sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
-		});
-		return sdp;
-	};
-// Parses ICE information from SDP media section or sessionpart.
-// FIXME: for consistency with other functions this should only
-//   get the ice-ufrag and ice-pwd lines as input.
-	SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
-		var lines = SDPUtils.splitLines(mediaSection);
-		// Search in session part, too.
-		lines = lines.concat(SDPUtils.splitLines(sessionpart));
-		var iceParameters = {
-			usernameFragment: lines.filter(function(line) {
-				return line.indexOf('a=ice-ufrag:') === 0;
-			})[0].substr(12),
-			password: lines.filter(function(line) {
-				return line.indexOf('a=ice-pwd:') === 0;
-			})[0].substr(10)
-		};
-		return iceParameters;
-	};
-
-// Serializes ICE parameters to SDP.
-	SDPUtils.writeIceParameters = function(params) {
-		return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
-			'a=ice-pwd:' + params.password + '\r\n';
-	};
-
-// Parses the SDP media section and returns RTCRtpParameters.
-	SDPUtils.parseRtpParameters = function(mediaSection) {
-		var description = {
-			codecs: [],
-			headerExtensions: [],
-			fecMechanisms: [],
-			rtcp: []
-		};
-		var lines = SDPUtils.splitLines(mediaSection);
-		var mline = lines[0].split(' ');
-		for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
-			var pt = mline[i];
-			var rtpmapline = SDPUtils.matchPrefix(
-				mediaSection, 'a=rtpmap:' + pt + ' ')[0];
-			if (rtpmapline) {
-				var codec = SDPUtils.parseRtpMap(rtpmapline);
-				var fmtps = SDPUtils.matchPrefix(
-					mediaSection, 'a=fmtp:' + pt + ' ');
-				// Only the first a=fmtp:<pt> is considered.
-				codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
-				codec.rtcpFeedback = SDPUtils.matchPrefix(
-					mediaSection, 'a=rtcp-fb:' + pt + ' ')
-					.map(SDPUtils.parseRtcpFb);
-				description.codecs.push(codec);
-				// parse FEC mechanisms from rtpmap lines.
-				switch (codec.name.toUpperCase()) {
-					case 'RED':
-					case 'ULPFEC':
-						description.fecMechanisms.push(codec.name.toUpperCase());
-						break;
-					default: // only RED and ULPFEC are recognized as FEC mechanisms.
-						break;
-				}
-			}
-		}
-		SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
-			description.headerExtensions.push(SDPUtils.parseExtmap(line));
-		});
-		// FIXME: parse rtcp.
-		return description;
-	};
-
-// Generates parts of the SDP media section describing the capabilities /
-// parameters.
-	SDPUtils.writeRtpDescription = function(kind, caps) {
-		var sdp = '';
-
-		// Build the mline.
-		sdp += 'm=' + kind + ' ';
-		sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
-		sdp += ' UDP/TLS/RTP/SAVPF ';
-		sdp += caps.codecs.map(function(codec) {
-				if (codec.preferredPayloadType !== undefined) {
-					return codec.preferredPayloadType;
-				}
-				return codec.payloadType;
-			}).join(' ') + '\r\n';
-
-		sdp += 'c=IN IP4 0.0.0.0\r\n';
-		sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';
-
-		// Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
-		caps.codecs.forEach(function(codec) {
-			sdp += SDPUtils.writeRtpMap(codec);
-			sdp += SDPUtils.writeFmtp(codec);
-			sdp += SDPUtils.writeRtcpFb(codec);
-		});
-		var maxptime = 0;
-		caps.codecs.forEach(function(codec) {
-			if (codec.maxptime > maxptime) {
-				maxptime = codec.maxptime;
-			}
-		});
-		if (maxptime > 0) {
-			sdp += 'a=maxptime:' + maxptime + '\r\n';
-		}
-		sdp += 'a=rtcp-mux\r\n';
-
-		caps.headerExtensions.forEach(function(extension) {
-			sdp += SDPUtils.writeExtmap(extension);
-		});
-		// FIXME: write fecMechanisms.
-		return sdp;
-	};
-
-// Parses the SDP media section and returns an array of
-// RTCRtpEncodingParameters.
-	SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
-		var encodingParameters = [];
-		var description = SDPUtils.parseRtpParameters(mediaSection);
-		var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
-		var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;
-
-		// filter a=ssrc:... cname:, ignore PlanB-msid
-		var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
-			.map(function(line) {
-				return SDPUtils.parseSsrcMedia(line);
-			})
-			.filter(function(parts) {
-				return parts.attribute === 'cname';
-			});
-		var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
-		var secondarySsrc;
-
-		var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
-			.map(function(line) {
-				var parts = line.split(' ');
-				parts.shift();
-				return parts.map(function(part) {
-					return parseInt(part, 10);
-				});
-			});
-		if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
-			secondarySsrc = flows[0][1];
-		}
-
-		description.codecs.forEach(function(codec) {
-			if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
-				var encParam = {
-					ssrc: primarySsrc,
-					codecPayloadType: parseInt(codec.parameters.apt, 10),
-					rtx: {
-						ssrc: secondarySsrc
-					}
-				};
-				encodingParameters.push(encParam);
-				if (hasRed) {
-					encParam = JSON.parse(JSON.stringify(encParam));
-					encParam.fec = {
-						ssrc: secondarySsrc,
-						mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
-					};
-					encodingParameters.push(encParam);
-				}
-			}
-		});
-		if (encodingParameters.length === 0 && primarySsrc) {
-			encodingParameters.push({
-				ssrc: primarySsrc
-			});
-		}
-
-		// we support both b=AS and b=TIAS but interpret AS as TIAS.
-		var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
-		if (bandwidth.length) {
-			if (bandwidth[0].indexOf('b=TIAS:') === 0) {
-				bandwidth = parseInt(bandwidth[0].substr(7), 10);
-			} else if (bandwidth[0].indexOf('b=AS:') === 0) {
-				bandwidth = parseInt(bandwidth[0].substr(5), 10);
-			}
-			encodingParameters.forEach(function(params) {
-				params.maxBitrate = bandwidth;
-			});
-		}
-		return encodingParameters;
-	};
-
-	SDPUtils.writeSessionBoilerplate = function() {
-		// FIXME: sess-id should be an NTP timestamp.
-		return 'v=0\r\n' +
-			'o=thisisadapterortc 8169639915646943137 2 IN IP4 127.0.0.1\r\n' +
-			's=-\r\n' +
-			't=0 0\r\n';
-	};
-
-	SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) {
-		var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);
-
-		// Map ICE parameters (ufrag, pwd) to SDP.
-		sdp += SDPUtils.writeIceParameters(
-			transceiver.iceGatherer.getLocalParameters());
-
-		// Map DTLS parameters to SDP.
-		sdp += SDPUtils.writeDtlsParameters(
-			transceiver.dtlsTransport.getLocalParameters(),
-			type === 'offer' ? 'actpass' : 'active');
-
-		sdp += 'a=mid:' + transceiver.mid + '\r\n';
-
-		if (transceiver.rtpSender && transceiver.rtpReceiver) {
-			sdp += 'a=sendrecv\r\n';
-		} else if (transceiver.rtpSender) {
-			sdp += 'a=sendonly\r\n';
-		} else if (transceiver.rtpReceiver) {
-			sdp += 'a=recvonly\r\n';
-		} else {
-			sdp += 'a=inactive\r\n';
-		}
-
-		// FIXME: for RTX there might be multiple SSRCs. Not implemented in Edge yet.
-		if (transceiver.rtpSender) {
-			var msid = 'msid:' + stream.id + ' ' +
-				transceiver.rtpSender.track.id + '\r\n';
-			sdp += 'a=' + msid;
-			sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
-				' ' + msid;
-			if (transceiver.sendEncodingParameters[0].rtx) {
-				sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
-					' ' + msid;
-				sdp += 'a=ssrc-group:FID ' +
-					transceiver.sendEncodingParameters[0].ssrc + ' ' +
-					transceiver.sendEncodingParameters[0].rtx.ssrc +
-					'\r\n';
-			}
-		}
-		// FIXME: this should be written by writeRtpDescription.
-		sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
-			' cname:' + SDPUtils.localCName + '\r\n';
-		if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
-			sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
-				' cname:' + SDPUtils.localCName + '\r\n';
-		}
-		return sdp;
-	};
-
-// Gets the direction from the mediaSection or the sessionpart.
-	SDPUtils.getDirection = function(mediaSection, sessionpart) {
-		// Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
-		var lines = SDPUtils.splitLines(mediaSection);
-		for (var i = 0; i < lines.length; i++) {
-			switch (lines[i]) {
-				case 'a=sendrecv':
-				case 'a=sendonly':
-				case 'a=recvonly':
-				case 'a=inactive':
-					return lines[i].substr(2);
-				default:
-				// FIXME: What should happen here?
-			}
-		}
-		if (sessionpart) {
-			return SDPUtils.getDirection(sessionpart);
-		}
-		return 'sendrecv';
-	};
-
-// Expose public methods.
-	module.exports = SDPUtils;
-
-},{}],63:[function(require,module,exports){
-
-	module.exports = require('./lib/');
-
-},{"./lib/":64}],64:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var url = require('./url');
-	var parser = require('socket.io-parser');
-	var Manager = require('./manager');
-	var debug = require('debug')('socket.io-client');
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = exports = lookup;
-
-	/**
-	 * Managers cache.
-	 */
-
-	var cache = exports.managers = {};
-
-	/**
-	 * Looks up an existing `Manager` for multiplexing.
-	 * If the user summons:
-	 *
-	 *   `io('http://localhost/a');`
-	 *   `io('http://localhost/b');`
-	 *
-	 * We reuse the existing instance based on same scheme/port/host,
-	 * and we initialize sockets for each namespace.
-	 *
-	 * @api public
-	 */
-
-	function lookup(uri, opts) {
-		if (typeof uri == 'object') {
-			opts = uri;
-			uri = undefined;
-		}
-
-		opts = opts || {};
-
-		var parsed = url(uri);
-		var source = parsed.source;
-		var id = parsed.id;
-		var io;
-
-		if (opts.forceNew || opts['force new connection'] || false === opts.multiplex) {
-			debug('ignoring socket cache for %s', source);
-			io = Manager(source, opts);
-		} else {
-			if (!cache[id]) {
-				debug('new io instance for %s', source);
-				cache[id] = Manager(source, opts);
-			}
-			io = cache[id];
-		}
-
-		return io.socket(parsed.path);
-	}
-
-	/**
-	 * Protocol version.
-	 *
-	 * @api public
-	 */
-
-	exports.protocol = parser.protocol;
-
-	/**
-	 * `connect`.
-	 *
-	 * @param {String} uri
-	 * @api public
-	 */
-
-	exports.connect = lookup;
-
-	/**
-	 * Expose constructors for standalone build.
-	 *
-	 * @api public
-	 */
-
-	exports.Manager = require('./manager');
-	exports.Socket = require('./socket');
-
-},{"./manager":65,"./socket":67,"./url":68,"debug":69,"socket.io-parser":71}],65:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var url = require('./url');
-	var eio = require('engine.io-client');
-	var Socket = require('./socket');
-	var Emitter = require('component-emitter');
-	var parser = require('socket.io-parser');
-	var on = require('./on');
-	var bind = require('component-bind');
-	var object = require('object-component');
-	var debug = require('debug')('socket.io-client:manager');
-	var indexOf = require('indexof');
-	var Backoff = require('backo2');
-
-	/**
-	 * Module exports
-	 */
-
-	module.exports = Manager;
-
-	/**
-	 * `Manager` constructor.
-	 *
-	 * @param {String} engine instance or engine uri/opts
-	 * @param {Object} options
-	 * @api public
-	 */
-
-	function Manager(uri, opts){
-		if (!(this instanceof Manager)) return new Manager(uri, opts);
-		if (uri && ('object' == typeof uri)) {
-			opts = uri;
-			uri = undefined;
-		}
-		opts = opts || {};
-
-		opts.path = opts.path || '/socket.io';
-		this.nsps = {};
-		this.subs = [];
-		this.opts = opts;
-		this.reconnection(opts.reconnection !== false);
-		this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
-		this.reconnectionDelay(opts.reconnectionDelay || 1000);
-		this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
-		this.randomizationFactor(opts.randomizationFactor || 0.5);
-		this.backoff = new Backoff({
-			min: this.reconnectionDelay(),
-			max: this.reconnectionDelayMax(),
-			jitter: this.randomizationFactor()
-		});
-		this.timeout(null == opts.timeout ? 20000 : opts.timeout);
-		this.readyState = 'closed';
-		this.uri = uri;
-		this.connected = [];
-		this.encoding = false;
-		this.packetBuffer = [];
-		this.encoder = new parser.Encoder();
-		this.decoder = new parser.Decoder();
-		this.autoConnect = opts.autoConnect !== false;
-		if (this.autoConnect) this.open();
-	}
-
-	/**
-	 * Propagate given event to sockets and emit on `this`
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.emitAll = function() {
-		this.emit.apply(this, arguments);
-		for (var nsp in this.nsps) {
-			this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
-		}
-	};
-
-	/**
-	 * Update `socket.id` of all sockets
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.updateSocketIds = function(){
-		for (var nsp in this.nsps) {
-			this.nsps[nsp].id = this.engine.id;
-		}
-	};
-
-	/**
-	 * Mix in `Emitter`.
-	 */
-
-	Emitter(Manager.prototype);
-
-	/**
-	 * Sets the `reconnection` config.
-	 *
-	 * @param {Boolean} true/false if it should automatically reconnect
-	 * @return {Manager} self or value
-	 * @api public
-	 */
-
-	Manager.prototype.reconnection = function(v){
-		if (!arguments.length) return this._reconnection;
-		this._reconnection = !!v;
-		return this;
-	};
-
-	/**
-	 * Sets the reconnection attempts config.
-	 *
-	 * @param {Number} max reconnection attempts before giving up
-	 * @return {Manager} self or value
-	 * @api public
-	 */
-
-	Manager.prototype.reconnectionAttempts = function(v){
-		if (!arguments.length) return this._reconnectionAttempts;
-		this._reconnectionAttempts = v;
-		return this;
-	};
-
-	/**
-	 * Sets the delay between reconnections.
-	 *
-	 * @param {Number} delay
-	 * @return {Manager} self or value
-	 * @api public
-	 */
-
-	Manager.prototype.reconnectionDelay = function(v){
-		if (!arguments.length) return this._reconnectionDelay;
-		this._reconnectionDelay = v;
-		this.backoff && this.backoff.setMin(v);
-		return this;
-	};
-
-	Manager.prototype.randomizationFactor = function(v){
-		if (!arguments.length) return this._randomizationFactor;
-		this._randomizationFactor = v;
-		this.backoff && this.backoff.setJitter(v);
-		return this;
-	};
-
-	/**
-	 * Sets the maximum delay between reconnections.
-	 *
-	 * @param {Number} delay
-	 * @return {Manager} self or value
-	 * @api public
-	 */
-
-	Manager.prototype.reconnectionDelayMax = function(v){
-		if (!arguments.length) return this._reconnectionDelayMax;
-		this._reconnectionDelayMax = v;
-		this.backoff && this.backoff.setMax(v);
-		return this;
-	};
-
-	/**
-	 * Sets the connection timeout. `false` to disable
-	 *
-	 * @return {Manager} self or value
-	 * @api public
-	 */
-
-	Manager.prototype.timeout = function(v){
-		if (!arguments.length) return this._timeout;
-		this._timeout = v;
-		return this;
-	};
-
-	/**
-	 * Starts trying to reconnect if reconnection is enabled and we have not
-	 * started reconnecting yet
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.maybeReconnectOnOpen = function() {
-		// Only try to reconnect if it's the first time we're connecting
-		if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
-			// keeps reconnection from firing twice for the same reconnection loop
-			this.reconnect();
-		}
-	};
-
-
-	/**
-	 * Sets the current transport `socket`.
-	 *
-	 * @param {Function} optional, callback
-	 * @return {Manager} self
-	 * @api public
-	 */
-
-	Manager.prototype.open =
-		Manager.prototype.connect = function(fn){
-			debug('readyState %s', this.readyState);
-			if (~this.readyState.indexOf('open')) return this;
-
-			debug('opening %s', this.uri);
-			this.engine = eio(this.uri, this.opts);
-			var socket = this.engine;
-			var self = this;
-			this.readyState = 'opening';
-			this.skipReconnect = false;
-
-			// emit `open`
-			var openSub = on(socket, 'open', function() {
-				self.onopen();
-				fn && fn();
-			});
-
-			// emit `connect_error`
-			var errorSub = on(socket, 'error', function(data){
-				debug('connect_error');
-				self.cleanup();
-				self.readyState = 'closed';
-				self.emitAll('connect_error', data);
-				if (fn) {
-					var err = new Error('Connection error');
-					err.data = data;
-					fn(err);
-				} else {
-					// Only do this if there is no fn to handle the error
-					self.maybeReconnectOnOpen();
-				}
-			});
-
-			// emit `connect_timeout`
-			if (false !== this._timeout) {
-				var timeout = this._timeout;
-				debug('connect attempt will timeout after %d', timeout);
-
-				// set timer
-				var timer = setTimeout(function(){
-					debug('connect attempt timed out after %d', timeout);
-					openSub.destroy();
-					socket.close();
-					socket.emit('error', 'timeout');
-					self.emitAll('connect_timeout', timeout);
-				}, timeout);
-
-				this.subs.push({
-					destroy: function(){
-						clearTimeout(timer);
-					}
-				});
-			}
-
-			this.subs.push(openSub);
-			this.subs.push(errorSub);
-
-			return this;
-		};
-
-	/**
-	 * Called upon transport open.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.onopen = function(){
-		debug('open');
-
-		// clear old subs
-		this.cleanup();
-
-		// mark as open
-		this.readyState = 'open';
-		this.emit('open');
-
-		// add new subs
-		var socket = this.engine;
-		this.subs.push(on(socket, 'data', bind(this, 'ondata')));
-		this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
-		this.subs.push(on(socket, 'error', bind(this, 'onerror')));
-		this.subs.push(on(socket, 'close', bind(this, 'onclose')));
-	};
-
-	/**
-	 * Called with data.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.ondata = function(data){
-		this.decoder.add(data);
-	};
-
-	/**
-	 * Called when parser fully decodes a packet.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.ondecoded = function(packet) {
-		this.emit('packet', packet);
-	};
-
-	/**
-	 * Called upon socket error.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.onerror = function(err){
-		debug('error', err);
-		this.emitAll('error', err);
-	};
-
-	/**
-	 * Creates a new socket for the given `nsp`.
-	 *
-	 * @return {Socket}
-	 * @api public
-	 */
-
-	Manager.prototype.socket = function(nsp){
-		var socket = this.nsps[nsp];
-		if (!socket) {
-			socket = new Socket(this, nsp);
-			this.nsps[nsp] = socket;
-			var self = this;
-			socket.on('connect', function(){
-				socket.id = self.engine.id;
-				if (!~indexOf(self.connected, socket)) {
-					self.connected.push(socket);
-				}
-			});
-		}
-		return socket;
-	};
-
-	/**
-	 * Called upon a socket close.
-	 *
-	 * @param {Socket} socket
-	 */
-
-	Manager.prototype.destroy = function(socket){
-		var index = indexOf(this.connected, socket);
-		if (~index) this.connected.splice(index, 1);
-		if (this.connected.length) return;
-
-		this.close();
-	};
-
-	/**
-	 * Writes a packet.
-	 *
-	 * @param {Object} packet
-	 * @api private
-	 */
-
-	Manager.prototype.packet = function(packet){
-		debug('writing packet %j', packet);
-		var self = this;
-
-		if (!self.encoding) {
-			// encode, then write to engine with result
-			self.encoding = true;
-			this.encoder.encode(packet, function(encodedPackets) {
-				for (var i = 0; i < encodedPackets.length; i++) {
-					self.engine.write(encodedPackets[i]);
-				}
-				self.encoding = false;
-				self.processPacketQueue();
-			});
-		} else { // add packet to the queue
-			self.packetBuffer.push(packet);
-		}
-	};
-
-	/**
-	 * If packet buffer is non-empty, begins encoding the
-	 * next packet in line.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.processPacketQueue = function() {
-		if (this.packetBuffer.length > 0 && !this.encoding) {
-			var pack = this.packetBuffer.shift();
-			this.packet(pack);
-		}
-	};
-
-	/**
-	 * Clean up transport subscriptions and packet buffer.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.cleanup = function(){
-		var sub;
-		while (sub = this.subs.shift()) sub.destroy();
-
-		this.packetBuffer = [];
-		this.encoding = false;
-
-		this.decoder.destroy();
-	};
-
-	/**
-	 * Close the current socket.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.close =
-		Manager.prototype.disconnect = function(){
-			this.skipReconnect = true;
-			this.backoff.reset();
-			this.readyState = 'closed';
-			this.engine && this.engine.close();
-		};
-
-	/**
-	 * Called upon engine close.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.onclose = function(reason){
-		debug('close');
-		this.cleanup();
-		this.backoff.reset();
-		this.readyState = 'closed';
-		this.emit('close', reason);
-		if (this._reconnection && !this.skipReconnect) {
-			this.reconnect();
-		}
-	};
-
-	/**
-	 * Attempt a reconnection.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.reconnect = function(){
-		if (this.reconnecting || this.skipReconnect) return this;
-
-		var self = this;
-
-		if (this.backoff.attempts >= this._reconnectionAttempts) {
-			debug('reconnect failed');
-			this.backoff.reset();
-			this.emitAll('reconnect_failed');
-			this.reconnecting = false;
-		} else {
-			var delay = this.backoff.duration();
-			debug('will wait %dms before reconnect attempt', delay);
-
-			this.reconnecting = true;
-			var timer = setTimeout(function(){
-				if (self.skipReconnect) return;
-
-				debug('attempting reconnect');
-				self.emitAll('reconnect_attempt', self.backoff.attempts);
-				self.emitAll('reconnecting', self.backoff.attempts);
-
-				// check again for the case socket closed in above events
-				if (self.skipReconnect) return;
-
-				self.open(function(err){
-					if (err) {
-						debug('reconnect attempt error');
-						self.reconnecting = false;
-						self.reconnect();
-						self.emitAll('reconnect_error', err.data);
-					} else {
-						debug('reconnect success');
-						self.onreconnect();
-					}
-				});
-			}, delay);
-
-			this.subs.push({
-				destroy: function(){
-					clearTimeout(timer);
-				}
-			});
-		}
-	};
-
-	/**
-	 * Called upon successful reconnect.
-	 *
-	 * @api private
-	 */
-
-	Manager.prototype.onreconnect = function(){
-		var attempt = this.backoff.attempts;
-		this.reconnecting = false;
-		this.backoff.reset();
-		this.updateSocketIds();
-		this.emitAll('reconnect', attempt);
-	};
-
-},{"./on":66,"./socket":67,"./url":68,"backo2":4,"component-bind":7,"component-emitter":8,"debug":69,"engine.io-client":10,"indexof":44,"object-component":51,"socket.io-parser":71}],66:[function(require,module,exports){
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = on;
-
-	/**
-	 * Helper for subscriptions.
-	 *
-	 * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
-	 * @param {String} event name
-	 * @param {Function} callback
-	 * @api public
-	 */
-
-	function on(obj, ev, fn) {
-		obj.on(ev, fn);
-		return {
-			destroy: function(){
-				obj.removeListener(ev, fn);
-			}
-		};
-	}
-
-},{}],67:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var parser = require('socket.io-parser');
-	var Emitter = require('component-emitter');
-	var toArray = require('to-array');
-	var on = require('./on');
-	var bind = require('component-bind');
-	var debug = require('debug')('socket.io-client:socket');
-	var hasBin = require('has-binary');
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = exports = Socket;
-
-	/**
-	 * Internal events (blacklisted).
-	 * These events can't be emitted by the user.
-	 *
-	 * @api private
-	 */
-
-	var events = {
-		connect: 1,
-		connect_error: 1,
-		connect_timeout: 1,
-		disconnect: 1,
-		error: 1,
-		reconnect: 1,
-		reconnect_attempt: 1,
-		reconnect_failed: 1,
-		reconnect_error: 1,
-		reconnecting: 1
-	};
-
-	/**
-	 * Shortcut to `Emitter#emit`.
-	 */
-
-	var emit = Emitter.prototype.emit;
-
-	/**
-	 * `Socket` constructor.
-	 *
-	 * @api public
-	 */
-
-	function Socket(io, nsp){
-		this.io = io;
-		this.nsp = nsp;
-		this.json = this; // compat
-		this.ids = 0;
-		this.acks = {};
-		if (this.io.autoConnect) this.open();
-		this.receiveBuffer = [];
-		this.sendBuffer = [];
-		this.connected = false;
-		this.disconnected = true;
-	}
-
-	/**
-	 * Mix in `Emitter`.
-	 */
-
-	Emitter(Socket.prototype);
-
-	/**
-	 * Subscribe to open, close and packet events
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.subEvents = function() {
-		if (this.subs) return;
-
-		var io = this.io;
-		this.subs = [
-			on(io, 'open', bind(this, 'onopen')),
-			on(io, 'packet', bind(this, 'onpacket')),
-			on(io, 'close', bind(this, 'onclose'))
-		];
-	};
-
-	/**
-	 * "Opens" the socket.
-	 *
-	 * @api public
-	 */
-
-	Socket.prototype.open =
-		Socket.prototype.connect = function(){
-			if (this.connected) return this;
-
-			this.subEvents();
-			this.io.open(); // ensure open
-			if ('open' == this.io.readyState) this.onopen();
-			return this;
-		};
-
-	/**
-	 * Sends a `message` event.
-	 *
-	 * @return {Socket} self
-	 * @api public
-	 */
-
-	Socket.prototype.send = function(){
-		var args = toArray(arguments);
-		args.unshift('message');
-		this.emit.apply(this, args);
-		return this;
-	};
-
-	/**
-	 * Override `emit`.
-	 * If the event is in `events`, it's emitted normally.
-	 *
-	 * @param {String} event name
-	 * @return {Socket} self
-	 * @api public
-	 */
-
-	Socket.prototype.emit = function(ev){
-		if (events.hasOwnProperty(ev)) {
-			emit.apply(this, arguments);
-			return this;
-		}
-
-		var args = toArray(arguments);
-		var parserType = parser.EVENT; // default
-		if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
-		var packet = { type: parserType, data: args };
-
-		// event ack callback
-		if ('function' == typeof args[args.length - 1]) {
-			debug('emitting packet with ack id %d', this.ids);
-			this.acks[this.ids] = args.pop();
-			packet.id = this.ids++;
-		}
-
-		if (this.connected) {
-			this.packet(packet);
-		} else {
-			this.sendBuffer.push(packet);
-		}
-
-		return this;
-	};
-
-	/**
-	 * Sends a packet.
-	 *
-	 * @param {Object} packet
-	 * @api private
-	 */
-
-	Socket.prototype.packet = function(packet){
-		packet.nsp = this.nsp;
-		this.io.packet(packet);
-	};
-
-	/**
-	 * Called upon engine `open`.
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.onopen = function(){
-		debug('transport is open - connecting');
-
-		// write connect packet if necessary
-		if ('/' != this.nsp) {
-			this.packet({ type: parser.CONNECT });
-		}
-	};
-
-	/**
-	 * Called upon engine `close`.
-	 *
-	 * @param {String} reason
-	 * @api private
-	 */
-
-	Socket.prototype.onclose = function(reason){
-		debug('close (%s)', reason);
-		this.connected = false;
-		this.disconnected = true;
-		delete this.id;
-		this.emit('disconnect', reason);
-	};
-
-	/**
-	 * Called with socket packet.
-	 *
-	 * @param {Object} packet
-	 * @api private
-	 */
-
-	Socket.prototype.onpacket = function(packet){
-		if (packet.nsp != this.nsp) return;
-
-		switch (packet.type) {
-			case parser.CONNECT:
-				this.onconnect();
-				break;
-
-			case parser.EVENT:
-				this.onevent(packet);
-				break;
-
-			case parser.BINARY_EVENT:
-				this.onevent(packet);
-				break;
-
-			case parser.ACK:
-				this.onack(packet);
-				break;
-
-			case parser.BINARY_ACK:
-				this.onack(packet);
-				break;
-
-			case parser.DISCONNECT:
-				this.ondisconnect();
-				break;
-
-			case parser.ERROR:
-				this.emit('error', packet.data);
-				break;
-		}
-	};
-
-	/**
-	 * Called upon a server event.
-	 *
-	 * @param {Object} packet
-	 * @api private
-	 */
-
-	Socket.prototype.onevent = function(packet){
-		var args = packet.data || [];
-		debug('emitting event %j', args);
-
-		if (null != packet.id) {
-			debug('attaching ack callback to event');
-			args.push(this.ack(packet.id));
-		}
-
-		if (this.connected) {
-			emit.apply(this, args);
-		} else {
-			this.receiveBuffer.push(args);
-		}
-	};
-
-	/**
-	 * Produces an ack callback to emit with an event.
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.ack = function(id){
-		var self = this;
-		var sent = false;
-		return function(){
-			// prevent double callbacks
-			if (sent) return;
-			sent = true;
-			var args = toArray(arguments);
-			debug('sending ack %j', args);
-
-			var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
-			self.packet({
-				type: type,
-				id: id,
-				data: args
-			});
-		};
-	};
-
-	/**
-	 * Called upon a server acknowlegement.
-	 *
-	 * @param {Object} packet
-	 * @api private
-	 */
-
-	Socket.prototype.onack = function(packet){
-		debug('calling ack %s with %j', packet.id, packet.data);
-		var fn = this.acks[packet.id];
-		fn.apply(this, packet.data);
-		delete this.acks[packet.id];
-	};
-
-	/**
-	 * Called upon server connect.
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.onconnect = function(){
-		this.connected = true;
-		this.disconnected = false;
-		this.emit('connect');
-		this.emitBuffered();
-	};
-
-	/**
-	 * Emit buffered events (received and emitted).
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.emitBuffered = function(){
-		var i;
-		for (i = 0; i < this.receiveBuffer.length; i++) {
-			emit.apply(this, this.receiveBuffer[i]);
-		}
-		this.receiveBuffer = [];
-
-		for (i = 0; i < this.sendBuffer.length; i++) {
-			this.packet(this.sendBuffer[i]);
-		}
-		this.sendBuffer = [];
-	};
-
-	/**
-	 * Called upon server disconnect.
-	 *
-	 * @api private
-	 */
-
-	Socket.prototype.ondisconnect = function(){
-		debug('server disconnect (%s)', this.nsp);
-		this.destroy();
-		this.onclose('io server disconnect');
-	};
-
-	/**
-	 * Called upon forced client/server side disconnections,
-	 * this method ensures the manager stops tracking us and
-	 * that reconnections don't get triggered for this.
-	 *
-	 * @api private.
-	 */
-
-	Socket.prototype.destroy = function(){
-		if (this.subs) {
-			// clean subscriptions to avoid reconnections
-			for (var i = 0; i < this.subs.length; i++) {
-				this.subs[i].destroy();
-			}
-			this.subs = null;
-		}
-
-		this.io.destroy(this);
-	};
-
-	/**
-	 * Disconnects the socket manually.
-	 *
-	 * @return {Socket} self
-	 * @api public
-	 */
-
-	Socket.prototype.close =
-		Socket.prototype.disconnect = function(){
-			if (this.connected) {
-				debug('performing disconnect (%s)', this.nsp);
-				this.packet({ type: parser.DISCONNECT });
-			}
-
-			// remove socket from pool
-			this.destroy();
-
-			if (this.connected) {
-				// fire events
-				this.onclose('io client disconnect');
-			}
-			return this;
-		};
-
-},{"./on":66,"component-bind":7,"component-emitter":8,"debug":69,"has-binary":41,"socket.io-parser":71,"to-array":75}],68:[function(require,module,exports){
-	(function (global){
-
-		/**
-		 * Module dependencies.
-		 */
-
-		var parseuri = require('parseuri');
-		var debug = require('debug')('socket.io-client:url');
-
-		/**
-		 * Module exports.
-		 */
-
-		module.exports = url;
-
-		/**
-		 * URL parser.
-		 *
-		 * @param {String} url
-		 * @param {Object} An object meant to mimic window.location.
-		 *                 Defaults to window.location.
-		 * @api public
-		 */
-
-		function url(uri, loc){
-			var obj = uri;
-
-			// default to window.location
-			var loc = loc || global.location;
-			if (null == uri) uri = loc.protocol + '//' + loc.host;
-
-			// relative path support
-			if ('string' == typeof uri) {
-				if ('/' == uri.charAt(0)) {
-					if ('/' == uri.charAt(1)) {
-						uri = loc.protocol + uri;
-					} else {
-						uri = loc.hostname + uri;
-					}
-				}
-
-				if (!/^(https?|wss?):\/\//.test(uri)) {
-					debug('protocol-less url %s', uri);
-					if ('undefined' != typeof loc) {
-						uri = loc.protocol + '//' + uri;
-					} else {
-						uri = 'https://' + uri;
-					}
-				}
-
-				// parse
-				debug('parse %s', uri);
-				obj = parseuri(uri);
-			}
-
-			// make sure we treat `localhost:80` and `localhost` equally
-			if (!obj.port) {
-				if (/^(http|ws)$/.test(obj.protocol)) {
-					obj.port = '80';
-				}
-				else if (/^(http|ws)s$/.test(obj.protocol)) {
-					obj.port = '443';
-				}
-			}
-
-			obj.path = obj.path || '/';
-
-			// define unique id
-			obj.id = obj.protocol + '://' + obj.host + ':' + obj.port;
-			// define href
-			obj.href = obj.protocol + '://' + obj.host + (loc && loc.port == obj.port ? '' : (':' + obj.port));
-
-			return obj;
-		}
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"debug":69,"parseuri":54}],69:[function(require,module,exports){
-
-	/**
-	 * Expose `debug()` as the module.
-	 */
-
-	module.exports = debug;
-
-	/**
-	 * Create a debugger with the given `name`.
-	 *
-	 * @param {String} name
-	 * @return {Type}
-	 * @api public
-	 */
-
-	function debug(name) {
-		if (!debug.enabled(name)) return function(){};
-
-		return function(fmt){
-			fmt = coerce(fmt);
-
-			var curr = new Date;
-			var ms = curr - (debug[name] || curr);
-			debug[name] = curr;
-
-			fmt = name
-				+ ' '
-				+ fmt
-				+ ' +' + debug.humanize(ms);
-
-			// This hackery is required for IE8
-			// where `console.log` doesn't have 'apply'
-			window.console
-			&& console.log
-			&& Function.prototype.apply.call(console.log, console, arguments);
-		}
-	}
-
-	/**
-	 * The currently active debug mode names.
-	 */
-
-	debug.names = [];
-	debug.skips = [];
-
-	/**
-	 * Enables a debug mode by name. This can include modes
-	 * separated by a colon and wildcards.
-	 *
-	 * @param {String} name
-	 * @api public
-	 */
-
-	debug.enable = function(name) {
-		try {
-			localStorage.debug = name;
-		} catch(e){}
-
-		var split = (name || '').split(/[\s,]+/)
-			, len = split.length;
-
-		for (var i = 0; i < len; i++) {
-			name = split[i].replace('*', '.*?');
-			if (name[0] === '-') {
-				debug.skips.push(new RegExp('^' + name.substr(1) + '$'));
-			}
-			else {
-				debug.names.push(new RegExp('^' + name + '$'));
-			}
-		}
-	};
-
-	/**
-	 * Disable debug output.
-	 *
-	 * @api public
-	 */
-
-	debug.disable = function(){
-		debug.enable('');
-	};
-
-	/**
-	 * Humanize the given `ms`.
-	 *
-	 * @param {Number} m
-	 * @return {String}
-	 * @api private
-	 */
-
-	debug.humanize = function(ms) {
-		var sec = 1000
-			, min = 60 * 1000
-			, hour = 60 * min;
-
-		if (ms >= hour) return (ms / hour).toFixed(1) + 'h';
-		if (ms >= min) return (ms / min).toFixed(1) + 'm';
-		if (ms >= sec) return (ms / sec | 0) + 's';
-		return ms + 'ms';
-	};
-
-	/**
-	 * Returns true if the given mode name is enabled, false otherwise.
-	 *
-	 * @param {String} name
-	 * @return {Boolean}
-	 * @api public
-	 */
-
-	debug.enabled = function(name) {
-		for (var i = 0, len = debug.skips.length; i < len; i++) {
-			if (debug.skips[i].test(name)) {
-				return false;
-			}
-		}
-		for (var i = 0, len = debug.names.length; i < len; i++) {
-			if (debug.names[i].test(name)) {
-				return true;
-			}
-		}
-		return false;
-	};
-
-	/**
-	 * Coerce `val`.
-	 */
-
-	function coerce(val) {
-		if (val instanceof Error) return val.stack || val.message;
-		return val;
-	}
-
-// persist
-
-	try {
-		if (window.localStorage) debug.enable(localStorage.debug);
-	} catch(e){}
-
-},{}],70:[function(require,module,exports){
-	(function (global){
-		/*global Blob,File*/
-
-		/**
-		 * Module requirements
-		 */
-
-		var isArray = require('isarray');
-		var isBuf = require('./is-buffer');
-
-		/**
-		 * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
-		 * Anything with blobs or files should be fed through removeBlobs before coming
-		 * here.
-		 *
-		 * @param {Object} packet - socket.io event packet
-		 * @return {Object} with deconstructed packet and list of buffers
-		 * @api public
-		 */
-
-		exports.deconstructPacket = function(packet){
-			var buffers = [];
-			var packetData = packet.data;
-
-			function _deconstructPacket(data) {
-				if (!data) return data;
-
-				if (isBuf(data)) {
-					var placeholder = { _placeholder: true, num: buffers.length };
-					buffers.push(data);
-					return placeholder;
-				} else if (isArray(data)) {
-					var newData = new Array(data.length);
-					for (var i = 0; i < data.length; i++) {
-						newData[i] = _deconstructPacket(data[i]);
-					}
-					return newData;
-				} else if ('object' == typeof data && !(data instanceof Date)) {
-					var newData = {};
-					for (var key in data) {
-						newData[key] = _deconstructPacket(data[key]);
-					}
-					return newData;
-				}
-				return data;
-			}
-
-			var pack = packet;
-			pack.data = _deconstructPacket(packetData);
-			pack.attachments = buffers.length; // number of binary 'attachments'
-			return {packet: pack, buffers: buffers};
-		};
-
-		/**
-		 * Reconstructs a binary packet from its placeholder packet and buffers
-		 *
-		 * @param {Object} packet - event packet with placeholders
-		 * @param {Array} buffers - binary buffers to put in placeholder positions
-		 * @return {Object} reconstructed packet
-		 * @api public
-		 */
-
-		exports.reconstructPacket = function(packet, buffers) {
-			var curPlaceHolder = 0;
-
-			function _reconstructPacket(data) {
-				if (data && data._placeholder) {
-					var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
-					return buf;
-				} else if (isArray(data)) {
-					for (var i = 0; i < data.length; i++) {
-						data[i] = _reconstructPacket(data[i]);
-					}
-					return data;
-				} else if (data && 'object' == typeof data) {
-					for (var key in data) {
-						data[key] = _reconstructPacket(data[key]);
-					}
-					return data;
-				}
-				return data;
-			}
-
-			packet.data = _reconstructPacket(packet.data);
-			packet.attachments = undefined; // no longer useful
-			return packet;
-		};
-
-		/**
-		 * Asynchronously removes Blobs or Files from data via
-		 * FileReader's readAsArrayBuffer method. Used before encoding
-		 * data as msgpack. Calls callback with the blobless data.
-		 *
-		 * @param {Object} data
-		 * @param {Function} callback
-		 * @api private
-		 */
-
-		exports.removeBlobs = function(data, callback) {
-			function _removeBlobs(obj, curKey, containingObject) {
-				if (!obj) return obj;
-
-				// convert any blob
-				if ((global.Blob && obj instanceof Blob) ||
-					(global.File && obj instanceof File)) {
-					pendingBlobs++;
-
-					// async filereader
-					var fileReader = new FileReader();
-					fileReader.onload = function() { // this.result == arraybuffer
-						if (containingObject) {
-							containingObject[curKey] = this.result;
-						}
-						else {
-							bloblessData = this.result;
-						}
-
-						// if nothing pending its callback time
-						if(! --pendingBlobs) {
-							callback(bloblessData);
-						}
-					};
-
-					fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
-				} else if (isArray(obj)) { // handle array
-					for (var i = 0; i < obj.length; i++) {
-						_removeBlobs(obj[i], i, obj);
-					}
-				} else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
-					for (var key in obj) {
-						_removeBlobs(obj[key], key, obj);
-					}
-				}
-			}
-
-			var pendingBlobs = 0;
-			var bloblessData = data;
-			_removeBlobs(bloblessData);
-			if (!pendingBlobs) {
-				callback(bloblessData);
-			}
-		};
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./is-buffer":72,"isarray":74}],71:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var debug = require('debug')('socket.io-parser');
-	var json = require('json3');
-	var isArray = require('isarray');
-	var Emitter = require('component-emitter');
-	var binary = require('./binary');
-	var isBuf = require('./is-buffer');
-
-	/**
-	 * Protocol version.
-	 *
-	 * @api public
-	 */
-
-	exports.protocol = 4;
-
-	/**
-	 * Packet types.
-	 *
-	 * @api public
-	 */
-
-	exports.types = [
-		'CONNECT',
-		'DISCONNECT',
-		'EVENT',
-		'BINARY_EVENT',
-		'ACK',
-		'BINARY_ACK',
-		'ERROR'
-	];
-
-	/**
-	 * Packet type `connect`.
-	 *
-	 * @api public
-	 */
-
-	exports.CONNECT = 0;
-
-	/**
-	 * Packet type `disconnect`.
-	 *
-	 * @api public
-	 */
-
-	exports.DISCONNECT = 1;
-
-	/**
-	 * Packet type `event`.
-	 *
-	 * @api public
-	 */
-
-	exports.EVENT = 2;
-
-	/**
-	 * Packet type `ack`.
-	 *
-	 * @api public
-	 */
-
-	exports.ACK = 3;
-
-	/**
-	 * Packet type `error`.
-	 *
-	 * @api public
-	 */
-
-	exports.ERROR = 4;
-
-	/**
-	 * Packet type 'binary event'
-	 *
-	 * @api public
-	 */
-
-	exports.BINARY_EVENT = 5;
-
-	/**
-	 * Packet type `binary ack`. For acks with binary arguments.
-	 *
-	 * @api public
-	 */
-
-	exports.BINARY_ACK = 6;
-
-	/**
-	 * Encoder constructor.
-	 *
-	 * @api public
-	 */
-
-	exports.Encoder = Encoder;
-
-	/**
-	 * Decoder constructor.
-	 *
-	 * @api public
-	 */
-
-	exports.Decoder = Decoder;
-
-	/**
-	 * A socket.io Encoder instance
-	 *
-	 * @api public
-	 */
-
-	function Encoder() {}
-
-	/**
-	 * Encode a packet as a single string if non-binary, or as a
-	 * buffer sequence, depending on packet type.
-	 *
-	 * @param {Object} obj - packet object
-	 * @param {Function} callback - function to handle encodings (likely engine.write)
-	 * @return Calls callback with Array of encodings
-	 * @api public
-	 */
-
-	Encoder.prototype.encode = function(obj, callback){
-		debug('encoding packet %j', obj);
-
-		if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
-			encodeAsBinary(obj, callback);
-		}
-		else {
-			var encoding = encodeAsString(obj);
-			callback([encoding]);
-		}
-	};
-
-	/**
-	 * Encode packet as string.
-	 *
-	 * @param {Object} packet
-	 * @return {String} encoded
-	 * @api private
-	 */
-
-	function encodeAsString(obj) {
-		var str = '';
-		var nsp = false;
-
-		// first is type
-		str += obj.type;
-
-		// attachments if we have them
-		if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
-			str += obj.attachments;
-			str += '-';
-		}
-
-		// if we have a namespace other than `/`
-		// we append it followed by a comma `,`
-		if (obj.nsp && '/' != obj.nsp) {
-			nsp = true;
-			str += obj.nsp;
-		}
-
-		// immediately followed by the id
-		if (null != obj.id) {
-			if (nsp) {
-				str += ',';
-				nsp = false;
-			}
-			str += obj.id;
-		}
-
-		// json data
-		if (null != obj.data) {
-			if (nsp) str += ',';
-			str += json.stringify(obj.data);
-		}
-
-		debug('encoded %j as %s', obj, str);
-		return str;
-	}
-
-	/**
-	 * Encode packet as 'buffer sequence' by removing blobs, and
-	 * deconstructing packet into object with placeholders and
-	 * a list of buffers.
-	 *
-	 * @param {Object} packet
-	 * @return {Buffer} encoded
-	 * @api private
-	 */
-
-	function encodeAsBinary(obj, callback) {
-
-		function writeEncoding(bloblessData) {
-			var deconstruction = binary.deconstructPacket(bloblessData);
-			var pack = encodeAsString(deconstruction.packet);
-			var buffers = deconstruction.buffers;
-
-			buffers.unshift(pack); // add packet info to beginning of data list
-			callback(buffers); // write all the buffers
-		}
-
-		binary.removeBlobs(obj, writeEncoding);
-	}
-
-	/**
-	 * A socket.io Decoder instance
-	 *
-	 * @return {Object} decoder
-	 * @api public
-	 */
-
-	function Decoder() {
-		this.reconstructor = null;
-	}
-
-	/**
-	 * Mix in `Emitter` with Decoder.
-	 */
-
-	Emitter(Decoder.prototype);
-
-	/**
-	 * Decodes an ecoded packet string into packet JSON.
-	 *
-	 * @param {String} obj - encoded packet
-	 * @return {Object} packet
-	 * @api public
-	 */
-
-	Decoder.prototype.add = function(obj) {
-		var packet;
-		if ('string' == typeof obj) {
-			packet = decodeString(obj);
-			if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
-				this.reconstructor = new BinaryReconstructor(packet);
-
-				// no attachments, labeled binary but no binary data to follow
-				if (this.reconstructor.reconPack.attachments === 0) {
-					this.emit('decoded', packet);
-				}
-			} else { // non-binary full packet
-				this.emit('decoded', packet);
-			}
-		}
-		else if (isBuf(obj) || obj.base64) { // raw binary data
-			if (!this.reconstructor) {
-				throw new Error('got binary data when not reconstructing a packet');
-			} else {
-				packet = this.reconstructor.takeBinaryData(obj);
-				if (packet) { // received final buffer
-					this.reconstructor = null;
-					this.emit('decoded', packet);
-				}
-			}
-		}
-		else {
-			throw new Error('Unknown type: ' + obj);
-		}
-	};
-
-	/**
-	 * Decode a packet String (JSON data)
-	 *
-	 * @param {String} str
-	 * @return {Object} packet
-	 * @api private
-	 */
-
-	function decodeString(str) {
-		var p = {};
-		var i = 0;
-
-		// look up type
-		p.type = Number(str.charAt(0));
-		if (null == exports.types[p.type]) return error();
-
-		// look up attachments if type binary
-		if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
-			var buf = '';
-			while (str.charAt(++i) != '-') {
-				buf += str.charAt(i);
-				if (i == str.length) break;
-			}
-			if (buf != Number(buf) || str.charAt(i) != '-') {
-				throw new Error('Illegal attachments');
-			}
-			p.attachments = Number(buf);
-		}
-
-		// look up namespace (if any)
-		if ('/' == str.charAt(i + 1)) {
-			p.nsp = '';
-			while (++i) {
-				var c = str.charAt(i);
-				if (',' == c) break;
-				p.nsp += c;
-				if (i == str.length) break;
-			}
-		} else {
-			p.nsp = '/';
-		}
-
-		// look up id
-		var next = str.charAt(i + 1);
-		if ('' !== next && Number(next) == next) {
-			p.id = '';
-			while (++i) {
-				var c = str.charAt(i);
-				if (null == c || Number(c) != c) {
-					--i;
-					break;
-				}
-				p.id += str.charAt(i);
-				if (i == str.length) break;
-			}
-			p.id = Number(p.id);
-		}
-
-		// look up json data
-		if (str.charAt(++i)) {
-			try {
-				p.data = json.parse(str.substr(i));
-			} catch(e){
-				return error();
-			}
-		}
-
-		debug('decoded %s as %j', str, p);
-		return p;
-	}
-
-	/**
-	 * Deallocates a parser's resources
-	 *
-	 * @api public
-	 */
-
-	Decoder.prototype.destroy = function() {
-		if (this.reconstructor) {
-			this.reconstructor.finishedReconstruction();
-		}
-	};
-
-	/**
-	 * A manager of a binary event's 'buffer sequence'. Should
-	 * be constructed whenever a packet of type BINARY_EVENT is
-	 * decoded.
-	 *
-	 * @param {Object} packet
-	 * @return {BinaryReconstructor} initialized reconstructor
-	 * @api private
-	 */
-
-	function BinaryReconstructor(packet) {
-		this.reconPack = packet;
-		this.buffers = [];
-	}
-
-	/**
-	 * Method to be called when binary data received from connection
-	 * after a BINARY_EVENT packet.
-	 *
-	 * @param {Buffer | ArrayBuffer} binData - the raw binary data received
-	 * @return {null | Object} returns null if more binary data is expected or
-	 *   a reconstructed packet object if all buffers have been received.
-	 * @api private
-	 */
-
-	BinaryReconstructor.prototype.takeBinaryData = function(binData) {
-		this.buffers.push(binData);
-		if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
-			var packet = binary.reconstructPacket(this.reconPack, this.buffers);
-			this.finishedReconstruction();
-			return packet;
-		}
-		return null;
-	};
-
-	/**
-	 * Cleans up binary packet reconstruction variables.
-	 *
-	 * @api private
-	 */
-
-	BinaryReconstructor.prototype.finishedReconstruction = function() {
-		this.reconPack = null;
-		this.buffers = [];
-	};
-
-	function error(data){
-		return {
-			type: exports.ERROR,
-			data: 'parser error'
-		};
-	}
-
-},{"./binary":70,"./is-buffer":72,"component-emitter":8,"debug":73,"isarray":74,"json3":45}],72:[function(require,module,exports){
-	(function (global){
-
-		module.exports = isBuf;
-
-		/**
-		 * Returns true if obj is a buffer or an arraybuffer.
-		 *
-		 * @api private
-		 */
-
-		function isBuf(obj) {
-			return (global.Buffer && global.Buffer.isBuffer(obj)) ||
-				(global.ArrayBuffer && obj instanceof ArrayBuffer);
-		}
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],73:[function(require,module,exports){
-	arguments[4][69][0].apply(exports,arguments)
-},{"dup":69}],74:[function(require,module,exports){
-	arguments[4][42][0].apply(exports,arguments)
-},{"dup":42}],75:[function(require,module,exports){
-	module.exports = toArray
-
-	function toArray(list, index) {
-		var array = []
-
-		index = index || 0
-
-		for (var i = index || 0; i < list.length; i++) {
-			array[i - index] = list[i]
-		}
-
-		return array
-	}
-
-},{}],76:[function(require,module,exports){
-// based on https://github.com/ESTOS/strophe.jingle/
-// adds wildemitter support
-	var util = require('util');
-	var adapter = require('webrtc-adapter'); // jshint ignore:line
-	var WildEmitter = require('wildemitter');
-
-	function dumpSDP(description) {
-		return {
-			type: description.type,
-			sdp: description.sdp
-		};
-	}
-
-	function dumpStream(stream) {
-		var info = {
-			label: stream.id,
-		};
-		if (stream.getAudioTracks().length) {
-			info.audio = stream.getAudioTracks().map(function (track) {
-				return track.id;
-			});
-		}
-		if (stream.getVideoTracks().length) {
-			info.video = stream.getVideoTracks().map(function (track) {
-				return track.id;
-			});
-		}
-		return info;
-	}
-
-	function TraceablePeerConnection(config, constraints) {
-		var self = this;
-		WildEmitter.call(this);
-
-		this.peerconnection = new window.RTCPeerConnection(config, constraints);
-
-		this.trace = function (what, info) {
-			self.emit('PeerConnectionTrace', {
-				time: new Date(),
-				type: what,
-				value: info || ""
-			});
-		};
-
-		this.onicecandidate = null;
-		this.peerconnection.onicecandidate = function (event) {
-			self.trace('onicecandidate', event.candidate);
-			if (self.onicecandidate !== null) {
-				self.onicecandidate(event);
-			}
-		};
-		this.onaddstream = null;
-		this.peerconnection.onaddstream = function (event) {
-			self.trace('onaddstream', dumpStream(event.stream));
-			if (self.onaddstream !== null) {
-				self.onaddstream(event);
-			}
-		};
-		this.onremovestream = null;
-		this.peerconnection.onremovestream = function (event) {
-			self.trace('onremovestream', dumpStream(event.stream));
-			if (self.onremovestream !== null) {
-				self.onremovestream(event);
-			}
-		};
-		this.onsignalingstatechange = null;
-		this.peerconnection.onsignalingstatechange = function (event) {
-			self.trace('onsignalingstatechange', self.signalingState);
-			if (self.onsignalingstatechange !== null) {
-				self.onsignalingstatechange(event);
-			}
-		};
-		this.oniceconnectionstatechange = null;
-		this.peerconnection.oniceconnectionstatechange = function (event) {
-			self.trace('oniceconnectionstatechange', self.iceConnectionState);
-			if (self.oniceconnectionstatechange !== null) {
-				self.oniceconnectionstatechange(event);
-			}
-		};
-		this.onnegotiationneeded = null;
-		this.peerconnection.onnegotiationneeded = function (event) {
-			self.trace('onnegotiationneeded');
-			if (self.onnegotiationneeded !== null) {
-				self.onnegotiationneeded(event);
-			}
-		};
-		self.ondatachannel = null;
-		this.peerconnection.ondatachannel = function (event) {
-			self.trace('ondatachannel', event);
-			if (self.ondatachannel !== null) {
-				self.ondatachannel(event);
-			}
-		};
-		this.getLocalStreams = this.peerconnection.getLocalStreams.bind(this.peerconnection);
-		this.getRemoteStreams = this.peerconnection.getRemoteStreams.bind(this.peerconnection);
-	}
-
-	util.inherits(TraceablePeerConnection, WildEmitter);
-
-	['signalingState', 'iceConnectionState', 'localDescription', 'remoteDescription'].forEach(function (prop) {
-		Object.defineProperty(TraceablePeerConnection.prototype, prop, {
-			get: function () {
-				return this.peerconnection[prop];
-			}
-		});
-	});
-
-	TraceablePeerConnection.prototype.addStream = function (stream) {
-		this.trace('addStream', dumpStream(stream));
-		this.peerconnection.addStream(stream);
-	};
-
-	TraceablePeerConnection.prototype.removeStream = function (stream) {
-		this.trace('removeStream', dumpStream(stream));
-		this.peerconnection.removeStream(stream);
-	};
-
-	TraceablePeerConnection.prototype.createDataChannel = function (label, opts) {
-		this.trace('createDataChannel', label, opts);
-		return this.peerconnection.createDataChannel(label, opts);
-	};
-
-	TraceablePeerConnection.prototype.setLocalDescription = function (description, successCallback, failureCallback) {
-		var self = this;
-		this.trace('setLocalDescription', dumpSDP(description));
-		return this.peerconnection.setLocalDescription(
-			description
-		).then(
-			function () {
-				self.trace('setLocalDescriptionOnSuccess');
-				if (successCallback) successCallback();
-			},
-			function (err) {
-				self.trace('setLocalDescriptionOnFailure', err);
-				if (failureCallback) failureCallback(err);
-			}
-		);
-	};
-
-	TraceablePeerConnection.prototype.setRemoteDescription = function (description, successCallback, failureCallback) {
-		var self = this;
-		this.trace('setRemoteDescription', dumpSDP(description));
-		return this.peerconnection.setRemoteDescription(
-			description
-		).then(
-			function () {
-				self.trace('setRemoteDescriptionOnSuccess');
-				if (successCallback) successCallback();
-			},
-			function (err) {
-				self.trace('setRemoteDescriptionOnFailure', err);
-				if (failureCallback) failureCallback(err);
-			}
-		);
-	};
-
-	TraceablePeerConnection.prototype.close = function () {
-		this.trace('stopXXX');
-		console.trace('Stop Trace');
-		if (this.peerconnection.signalingState != 'closed') {
-			this.peerconnection.close();
-		}
-	};
-
-	TraceablePeerConnection.prototype.createOffer = function (successCallback, failureCallback, constraints) {
-		var self = this;
-		this.trace('createOffer', constraints);
-		return this.peerconnection.createOffer(
-			constraints
-		).then(
-			function (offer) {
-				self.trace('createOfferOnSuccess', dumpSDP(offer));
-				if (successCallback) successCallback(offer);
-			},
-			function (err) {
-				self.trace('createOfferOnFailure', err);
-				if (failureCallback) failureCallback(err);
-			}
-		);
-	};
-
-	TraceablePeerConnection.prototype.createAnswer = function (successCallback, failureCallback, constraints) {
-		var self = this;
-		this.trace('createAnswer', constraints);
-		return this.peerconnection.createAnswer(
-			constraints
-		).then(
-			function (answer) {
-				self.trace('createAnswerOnSuccess', dumpSDP(answer));
-				if (successCallback) successCallback(answer);
-			},
-			function (err) {
-				self.trace('createAnswerOnFailure', err);
-				if (failureCallback) failureCallback(err);
-			}
-		);
-	};
-
-	TraceablePeerConnection.prototype.addIceCandidate = function (candidate, successCallback, failureCallback) {
-		var self = this;
-		this.trace('addIceCandidate', candidate);
-		return this.peerconnection.addIceCandidate(
-			candidate
-		).then(
-			function () {
-				//self.trace('addIceCandidateOnSuccess');
-				if (successCallback) successCallback();
-			},
-			function (err) {
-				self.trace('addIceCandidateOnFailure', err);
-				if (failureCallback) failureCallback(err);
-			}
-		);
-	};
-
-	TraceablePeerConnection.prototype.getStats = function () {
-		this.peerconnection.getStats.apply(this.peerconnection, arguments);
-	};
-
-	module.exports = TraceablePeerConnection;
-
-},{"util":89,"webrtc-adapter":77,"wildemitter":100}],77:[function(require,module,exports){
-	arguments[4][30][0].apply(exports,arguments)
-},{"./chrome/chrome_shim":78,"./edge/edge_shim":80,"./firefox/firefox_shim":82,"./safari/safari_shim":84,"./utils":85,"dup":30}],78:[function(require,module,exports){
-	arguments[4][31][0].apply(exports,arguments)
-},{"../utils.js":85,"./getusermedia":79,"dup":31}],79:[function(require,module,exports){
-	arguments[4][32][0].apply(exports,arguments)
-},{"../utils.js":85,"dup":32}],80:[function(require,module,exports){
-	arguments[4][33][0].apply(exports,arguments)
-},{"../utils":85,"./getusermedia":81,"dup":33,"sdp":62}],81:[function(require,module,exports){
-	arguments[4][34][0].apply(exports,arguments)
-},{"dup":34}],82:[function(require,module,exports){
-	arguments[4][35][0].apply(exports,arguments)
-},{"../utils":85,"./getusermedia":83,"dup":35}],83:[function(require,module,exports){
-	arguments[4][36][0].apply(exports,arguments)
-},{"../utils":85,"dup":36}],84:[function(require,module,exports){
-	arguments[4][37][0].apply(exports,arguments)
-},{"dup":37}],85:[function(require,module,exports){
-	arguments[4][38][0].apply(exports,arguments)
-},{"dup":38}],86:[function(require,module,exports){
-	(function (global){
-		/*! https://mths.be/utf8js v2.0.0 by @mathias */
-		;(function(root) {
-
-			// Detect free variables `exports`
-			var freeExports = typeof exports == 'object' && exports;
-
-			// Detect free variable `module`
-			var freeModule = typeof module == 'object' && module &&
-				module.exports == freeExports && module;
-
-			// Detect free variable `global`, from Node.js or Browserified code,
-			// and use it as `root`
-			var freeGlobal = typeof global == 'object' && global;
-			if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
-				root = freeGlobal;
-			}
-
-			/*--------------------------------------------------------------------------*/
-
-			var stringFromCharCode = String.fromCharCode;
-
-			// Taken from https://mths.be/punycode
-			function ucs2decode(string) {
-				var output = [];
-				var counter = 0;
-				var length = string.length;
-				var value;
-				var extra;
-				while (counter < length) {
-					value = string.charCodeAt(counter++);
-					if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
-						// high surrogate, and there is a next character
-						extra = string.charCodeAt(counter++);
-						if ((extra & 0xFC00) == 0xDC00) { // low surrogate
-							output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
-						} else {
-							// unmatched surrogate; only append this code unit, in case the next
-							// code unit is the high surrogate of a surrogate pair
-							output.push(value);
-							counter--;
-						}
-					} else {
-						output.push(value);
-					}
-				}
-				return output;
-			}
-
-			// Taken from https://mths.be/punycode
-			function ucs2encode(array) {
-				var length = array.length;
-				var index = -1;
-				var value;
-				var output = '';
-				while (++index < length) {
-					value = array[index];
-					if (value > 0xFFFF) {
-						value -= 0x10000;
-						output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
-						value = 0xDC00 | value & 0x3FF;
-					}
-					output += stringFromCharCode(value);
-				}
-				return output;
-			}
-
-			function checkScalarValue(codePoint) {
-				if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
-					throw Error(
-						'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
-						' is not a scalar value'
-					);
-				}
-			}
-			/*--------------------------------------------------------------------------*/
-
-			function createByte(codePoint, shift) {
-				return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
-			}
-
-			function encodeCodePoint(codePoint) {
-				if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
-					return stringFromCharCode(codePoint);
-				}
-				var symbol = '';
-				if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
-					symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
-				}
-				else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
-					checkScalarValue(codePoint);
-					symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
-					symbol += createByte(codePoint, 6);
-				}
-				else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
-					symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
-					symbol += createByte(codePoint, 12);
-					symbol += createByte(codePoint, 6);
-				}
-				symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
-				return symbol;
-			}
-
-			function utf8encode(string) {
-				var codePoints = ucs2decode(string);
-				var length = codePoints.length;
-				var index = -1;
-				var codePoint;
-				var byteString = '';
-				while (++index < length) {
-					codePoint = codePoints[index];
-					byteString += encodeCodePoint(codePoint);
-				}
-				return byteString;
-			}
-
-			/*--------------------------------------------------------------------------*/
-
-			function readContinuationByte() {
-				if (byteIndex >= byteCount) {
-					throw Error('Invalid byte index');
-				}
-
-				var continuationByte = byteArray[byteIndex] & 0xFF;
-				byteIndex++;
-
-				if ((continuationByte & 0xC0) == 0x80) {
-					return continuationByte & 0x3F;
-				}
-
-				// If we end up here, it’s not a continuation byte
-				throw Error('Invalid continuation byte');
-			}
-
-			function decodeSymbol() {
-				var byte1;
-				var byte2;
-				var byte3;
-				var byte4;
-				var codePoint;
-
-				if (byteIndex > byteCount) {
-					throw Error('Invalid byte index');
-				}
-
-				if (byteIndex == byteCount) {
-					return false;
-				}
-
-				// Read first byte
-				byte1 = byteArray[byteIndex] & 0xFF;
-				byteIndex++;
-
-				// 1-byte sequence (no continuation bytes)
-				if ((byte1 & 0x80) == 0) {
-					return byte1;
-				}
-
-				// 2-byte sequence
-				if ((byte1 & 0xE0) == 0xC0) {
-					var byte2 = readContinuationByte();
-					codePoint = ((byte1 & 0x1F) << 6) | byte2;
-					if (codePoint >= 0x80) {
-						return codePoint;
-					} else {
-						throw Error('Invalid continuation byte');
-					}
-				}
-
-				// 3-byte sequence (may include unpaired surrogates)
-				if ((byte1 & 0xF0) == 0xE0) {
-					byte2 = readContinuationByte();
-					byte3 = readContinuationByte();
-					codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
-					if (codePoint >= 0x0800) {
-						checkScalarValue(codePoint);
-						return codePoint;
-					} else {
-						throw Error('Invalid continuation byte');
-					}
-				}
-
-				// 4-byte sequence
-				if ((byte1 & 0xF8) == 0xF0) {
-					byte2 = readContinuationByte();
-					byte3 = readContinuationByte();
-					byte4 = readContinuationByte();
-					codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
-						(byte3 << 0x06) | byte4;
-					if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
-						return codePoint;
-					}
-				}
-
-				throw Error('Invalid UTF-8 detected');
-			}
-
-			var byteArray;
-			var byteCount;
-			var byteIndex;
-			function utf8decode(byteString) {
-				byteArray = ucs2decode(byteString);
-				byteCount = byteArray.length;
-				byteIndex = 0;
-				var codePoints = [];
-				var tmp;
-				while ((tmp = decodeSymbol()) !== false) {
-					codePoints.push(tmp);
-				}
-				return ucs2encode(codePoints);
-			}
-
-			/*--------------------------------------------------------------------------*/
-
-			var utf8 = {
-				'version': '2.0.0',
-				'encode': utf8encode,
-				'decode': utf8decode
-			};
-
-			// Some AMD build optimizers, like r.js, check for specific condition patterns
-			// like the following:
-			if (
-				typeof define == 'function' &&
-				typeof define.amd == 'object' &&
-				define.amd
-			) {
-				define(function() {
-					return utf8;
-				});
-			}	else if (freeExports && !freeExports.nodeType) {
-				if (freeModule) { // in Node.js or RingoJS v0.8.0+
-					freeModule.exports = utf8;
-				} else { // in Narwhal or RingoJS v0.7.0-
-					var object = {};
-					var hasOwnProperty = object.hasOwnProperty;
-					for (var key in utf8) {
-						hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
-					}
-				}
-			} else { // in Rhino or a web browser
-				root.utf8 = utf8;
-			}
-
-		}(this));
-
-	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],87:[function(require,module,exports){
-	if (typeof Object.create === 'function') {
-		// implementation from standard node.js 'util' module
-		module.exports = function inherits(ctor, superCtor) {
-			ctor.super_ = superCtor
-			ctor.prototype = Object.create(superCtor.prototype, {
-				constructor: {
-					value: ctor,
-					enumerable: false,
-					writable: true,
-					configurable: true
-				}
-			});
-		};
-	} else {
-		// old school shim for old browsers
-		module.exports = function inherits(ctor, superCtor) {
-			ctor.super_ = superCtor
-			var TempCtor = function () {}
-			TempCtor.prototype = superCtor.prototype
-			ctor.prototype = new TempCtor()
-			ctor.prototype.constructor = ctor
-		}
-	}
-
-},{}],88:[function(require,module,exports){
-	module.exports = function isBuffer(arg) {
-		return arg && typeof arg === 'object'
-			&& typeof arg.copy === 'function'
-			&& typeof arg.fill === 'function'
-			&& typeof arg.readUInt8 === 'function';
-	}
-},{}],89:[function(require,module,exports){
-	(function (process,global){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-		var formatRegExp = /%[sdj%]/g;
-		exports.format = function(f) {
-			if (!isString(f)) {
-				var objects = [];
-				for (var i = 0; i < arguments.length; i++) {
-					objects.push(inspect(arguments[i]));
-				}
-				return objects.join(' ');
-			}
-
-			var i = 1;
-			var args = arguments;
-			var len = args.length;
-			var str = String(f).replace(formatRegExp, function(x) {
-				if (x === '%%') return '%';
-				if (i >= len) return x;
-				switch (x) {
-					case '%s': return String(args[i++]);
-					case '%d': return Number(args[i++]);
-					case '%j':
-						try {
-							return JSON.stringify(args[i++]);
-						} catch (_) {
-							return '[Circular]';
-						}
-					default:
-						return x;
-				}
-			});
-			for (var x = args[i]; i < len; x = args[++i]) {
-				if (isNull(x) || !isObject(x)) {
-					str += ' ' + x;
-				} else {
-					str += ' ' + inspect(x);
-				}
-			}
-			return str;
-		};
-
-
-// Mark that a method should not be used.
-// Returns a modified function which warns once by default.
-// If --no-deprecation is set, then it is a no-op.
-		exports.deprecate = function(fn, msg) {
-			// Allow for deprecating things in the process of starting up.
-			if (isUndefined(global.process)) {
-				return function() {
-					return exports.deprecate(fn, msg).apply(this, arguments);
-				};
-			}
-
-			if (process.noDeprecation === true) {
-				return fn;
-			}
-
-			var warned = false;
-			function deprecated() {
-				if (!warned) {
-					if (process.throwDeprecation) {
-						throw new Error(msg);
-					} else if (process.traceDeprecation) {
-						console.trace(msg);
-					} else {
-						console.error(msg);
-					}
-					warned = true;
-				}
-				return fn.apply(this, arguments);
-			}
-
-			return deprecated;
-		};
-
-
-		var debugs = {};
-		var debugEnviron;
-		exports.debuglog = function(set) {
-			if (isUndefined(debugEnviron))
-				debugEnviron = process.env.NODE_DEBUG || '';
-			set = set.toUpperCase();
-			if (!debugs[set]) {
-				if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
-					var pid = process.pid;
-					debugs[set] = function() {
-						var msg = exports.format.apply(exports, arguments);
-						console.error('%s %d: %s', set, pid, msg);
-					};
-				} else {
-					debugs[set] = function() {};
-				}
-			}
-			return debugs[set];
-		};
-
-
-		/**
-		 * Echos the value of a value. Trys to print the value out
-		 * in the best way possible given the different types.
-		 *
-		 * @param {Object} obj The object to print out.
-		 * @param {Object} opts Optional options object that alters the output.
-		 */
-		/* legacy: obj, showHidden, depth, colors*/
-		function inspect(obj, opts) {
-			// default options
-			var ctx = {
-				seen: [],
-				stylize: stylizeNoColor
-			};
-			// legacy...
-			if (arguments.length >= 3) ctx.depth = arguments[2];
-			if (arguments.length >= 4) ctx.colors = arguments[3];
-			if (isBoolean(opts)) {
-				// legacy...
-				ctx.showHidden = opts;
-			} else if (opts) {
-				// got an "options" object
-				exports._extend(ctx, opts);
-			}
-			// set default options
-			if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
-			if (isUndefined(ctx.depth)) ctx.depth = 2;
-			if (isUndefined(ctx.colors)) ctx.colors = false;
-			if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
-			if (ctx.colors) ctx.stylize = stylizeWithColor;
-			return formatValue(ctx, obj, ctx.depth);
-		}
-		exports.inspect = inspect;
-
-
-// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
-		inspect.colors = {
-			'bold' : [1, 22],
-			'italic' : [3, 23],
-			'underline' : [4, 24],
-			'inverse' : [7, 27],
-			'white' : [37, 39],
-			'grey' : [90, 39],
-			'black' : [30, 39],
-			'blue' : [34, 39],
-			'cyan' : [36, 39],
-			'green' : [32, 39],
-			'magenta' : [35, 39],
-			'red' : [31, 39],
-			'yellow' : [33, 39]
-		};
-
-// Don't use 'blue' not visible on cmd.exe
-		inspect.styles = {
-			'special': 'cyan',
-			'number': 'yellow',
-			'boolean': 'yellow',
-			'undefined': 'grey',
-			'null': 'bold',
-			'string': 'green',
-			'date': 'magenta',
-			// "name": intentionally not styling
-			'regexp': 'red'
-		};
-
-
-		function stylizeWithColor(str, styleType) {
-			var style = inspect.styles[styleType];
-
-			if (style) {
-				return '\u001b[' + inspect.colors[style][0] + 'm' + str +
-					'\u001b[' + inspect.colors[style][1] + 'm';
-			} else {
-				return str;
-			}
-		}
-
-
-		function stylizeNoColor(str, styleType) {
-			return str;
-		}
-
-
-		function arrayToHash(array) {
-			var hash = {};
-
-			array.forEach(function(val, idx) {
-				hash[val] = true;
-			});
-
-			return hash;
-		}
-
-
-		function formatValue(ctx, value, recurseTimes) {
-			// Provide a hook for user-specified inspect functions.
-			// Check that value is an object with an inspect function on it
-			if (ctx.customInspect &&
-				value &&
-				isFunction(value.inspect) &&
-				// Filter out the util module, it's inspect function is special
-				value.inspect !== exports.inspect &&
-				// Also filter out any prototype objects using the circular check.
-				!(value.constructor && value.constructor.prototype === value)) {
-				var ret = value.inspect(recurseTimes, ctx);
-				if (!isString(ret)) {
-					ret = formatValue(ctx, ret, recurseTimes);
-				}
-				return ret;
-			}
-
-			// Primitive types cannot have properties
-			var primitive = formatPrimitive(ctx, value);
-			if (primitive) {
-				return primitive;
-			}
-
-			// Look up the keys of the object.
-			var keys = Object.keys(value);
-			var visibleKeys = arrayToHash(keys);
-
-			if (ctx.showHidden) {
-				keys = Object.getOwnPropertyNames(value);
-			}
-
-			// IE doesn't make error fields non-enumerable
-			// http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
-			if (isError(value)
-				&& (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
-				return formatError(value);
-			}
-
-			// Some type of object without properties can be shortcutted.
-			if (keys.length === 0) {
-				if (isFunction(value)) {
-					var name = value.name ? ': ' + value.name : '';
-					return ctx.stylize('[Function' + name + ']', 'special');
-				}
-				if (isRegExp(value)) {
-					return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-				}
-				if (isDate(value)) {
-					return ctx.stylize(Date.prototype.toString.call(value), 'date');
-				}
-				if (isError(value)) {
-					return formatError(value);
-				}
-			}
-
-			var base = '', array = false, braces = ['{', '}'];
-
-			// Make Array say that they are Array
-			if (isArray(value)) {
-				array = true;
-				braces = ['[', ']'];
-			}
-
-			// Make functions say that they are functions
-			if (isFunction(value)) {
-				var n = value.name ? ': ' + value.name : '';
-				base = ' [Function' + n + ']';
-			}
-
-			// Make RegExps say that they are RegExps
-			if (isRegExp(value)) {
-				base = ' ' + RegExp.prototype.toString.call(value);
-			}
-
-			// Make dates with properties first say the date
-			if (isDate(value)) {
-				base = ' ' + Date.prototype.toUTCString.call(value);
-			}
-
-			// Make error with message first say the error
-			if (isError(value)) {
-				base = ' ' + formatError(value);
-			}
-
-			if (keys.length === 0 && (!array || value.length == 0)) {
-				return braces[0] + base + braces[1];
-			}
-
-			if (recurseTimes < 0) {
-				if (isRegExp(value)) {
-					return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-				} else {
-					return ctx.stylize('[Object]', 'special');
-				}
-			}
-
-			ctx.seen.push(value);
-
-			var output;
-			if (array) {
-				output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-			} else {
-				output = keys.map(function(key) {
-					return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
-				});
-			}
-
-			ctx.seen.pop();
-
-			return reduceToSingleString(output, base, braces);
-		}
-
-
-		function formatPrimitive(ctx, value) {
-			if (isUndefined(value))
-				return ctx.stylize('undefined', 'undefined');
-			if (isString(value)) {
-				var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
-						.replace(/'/g, "\\'")
-						.replace(/\\"/g, '"') + '\'';
-				return ctx.stylize(simple, 'string');
-			}
-			if (isNumber(value))
-				return ctx.stylize('' + value, 'number');
-			if (isBoolean(value))
-				return ctx.stylize('' + value, 'boolean');
-			// For some reason typeof null is "object", so special case here.
-			if (isNull(value))
-				return ctx.stylize('null', 'null');
-		}
-
-
-		function formatError(value) {
-			return '[' + Error.prototype.toString.call(value) + ']';
-		}
-
-
-		function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-			var output = [];
-			for (var i = 0, l = value.length; i < l; ++i) {
-				if (hasOwnProperty(value, String(i))) {
-					output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-						String(i), true));
-				} else {
-					output.push('');
-				}
-			}
-			keys.forEach(function(key) {
-				if (!key.match(/^\d+$/)) {
-					output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-						key, true));
-				}
-			});
-			return output;
-		}
-
-
-		function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-			var name, str, desc;
-			desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
-			if (desc.get) {
-				if (desc.set) {
-					str = ctx.stylize('[Getter/Setter]', 'special');
-				} else {
-					str = ctx.stylize('[Getter]', 'special');
-				}
-			} else {
-				if (desc.set) {
-					str = ctx.stylize('[Setter]', 'special');
-				}
-			}
-			if (!hasOwnProperty(visibleKeys, key)) {
-				name = '[' + key + ']';
-			}
-			if (!str) {
-				if (ctx.seen.indexOf(desc.value) < 0) {
-					if (isNull(recurseTimes)) {
-						str = formatValue(ctx, desc.value, null);
-					} else {
-						str = formatValue(ctx, desc.value, recurseTimes - 1);
-					}
-					if (str.indexOf('\n') > -1) {
-						if (array) {
-							str = str.split('\n').map(function(line) {
-								return '  ' + line;
-							}).join('\n').substr(2);
-						} else {
-							str = '\n' + str.split('\n').map(function(line) {
-									return '   ' + line;
-								}).join('\n');
-						}
-					}
-				} else {
-					str = ctx.stylize('[Circular]', 'special');
-				}
-			}
-			if (isUndefined(name)) {
-				if (array && key.match(/^\d+$/)) {
-					return str;
-				}
-				name = JSON.stringify('' + key);
-				if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-					name = name.substr(1, name.length - 2);
-					name = ctx.stylize(name, 'name');
-				} else {
-					name = name.replace(/'/g, "\\'")
-						.replace(/\\"/g, '"')
-						.replace(/(^"|"$)/g, "'");
-					name = ctx.stylize(name, 'string');
-				}
-			}
-
-			return name + ': ' + str;
-		}
-
-
-		function reduceToSingleString(output, base, braces) {
-			var numLinesEst = 0;
-			var length = output.reduce(function(prev, cur) {
-				numLinesEst++;
-				if (cur.indexOf('\n') >= 0) numLinesEst++;
-				return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
-			}, 0);
-
-			if (length > 60) {
-				return braces[0] +
-					(base === '' ? '' : base + '\n ') +
-					' ' +
-					output.join(',\n  ') +
-					' ' +
-					braces[1];
-			}
-
-			return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-		}
-
-
-// NOTE: These type checking functions intentionally don't use `instanceof`
-// because it is fragile and can be easily faked with `Object.create()`.
-		function isArray(ar) {
-			return Array.isArray(ar);
-		}
-		exports.isArray = isArray;
-
-		function isBoolean(arg) {
-			return typeof arg === 'boolean';
-		}
-		exports.isBoolean = isBoolean;
-
-		function isNull(arg) {
-			return arg === null;
-		}
-		exports.isNull = isNull;
-
-		function isNullOrUndefined(arg) {
-			return arg == null;
-		}
-		exports.isNullOrUndefined = isNullOrUndefined;
-
-		function isNumber(arg) {
-			return typeof arg === 'number';
-		}
-		exports.isNumber = isNumber;
-
-		function isString(arg) {
-			return typeof arg === 'string';
-		}
-		exports.isString = isString;
-
-		function isSymbol(arg) {
-			return typeof arg === 'symbol';
-		}
-		exports.isSymbol = isSymbol;
-
-		function isUndefined(arg) {
-			return arg === void 0;
-		}
-		exports.isUndefined = isUndefined;
-
-		function isRegExp(re) {
-			return isObject(re) && objectToString(re) === '[object RegExp]';
-		}
-		exports.isRegExp = isRegExp;
-
-		function isObject(arg) {
-			return typeof arg === 'object' && arg !== null;
-		}
-		exports.isObject = isObject;
-
-		function isDate(d) {
-			return isObject(d) && objectToString(d) === '[object Date]';
-		}
-		exports.isDate = isDate;
-
-		function isError(e) {
-			return isObject(e) &&
-				(objectToString(e) === '[object Error]' || e instanceof Error);
-		}
-		exports.isError = isError;
-
-		function isFunction(arg) {
-			return typeof arg === 'function';
-		}
-		exports.isFunction = isFunction;
-
-		function isPrimitive(arg) {
-			return arg === null ||
-				typeof arg === 'boolean' ||
-				typeof arg === 'number' ||
-				typeof arg === 'string' ||
-				typeof arg === 'symbol' ||  // ES6 symbol
-				typeof arg === 'undefined';
-		}
-		exports.isPrimitive = isPrimitive;
-
-		exports.isBuffer = require('./support/isBuffer');
-
-		function objectToString(o) {
-			return Object.prototype.toString.call(o);
-		}
-
-
-		function pad(n) {
-			return n < 10 ? '0' + n.toString(10) : n.toString(10);
-		}
-
-
-		var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
-			'Oct', 'Nov', 'Dec'];
-
-// 26 Feb 16:19:34
-		function timestamp() {
-			var d = new Date();
-			var time = [pad(d.getHours()),
-				pad(d.getMinutes()),
-				pad(d.getSeconds())].join(':');
-			return [d.getDate(), months[d.getMonth()], time].join(' ');
-		}
-
-
-// log is just a thin wrapper to console.log that prepends a timestamp
-		exports.log = function() {
-			console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
-		};
-
-
-		/**
-		 * Inherit the prototype methods from one constructor into another.
-		 *
-		 * The Function.prototype.inherits from lang.js rewritten as a standalone
-		 * function (not on Function.prototype). NOTE: If this file is to be loaded
-		 * during bootstrapping this function needs to be rewritten using some native
-		 * functions as prototype setup using normal JavaScript does not work as
-		 * expected during bootstrapping (see mirror.js in r114903).
-		 *
-		 * @param {function} ctor Constructor function which needs to inherit the
-		 *     prototype.
-		 * @param {function} superCtor Constructor function to inherit prototype from.
-		 */
-		exports.inherits = require('inherits');
-
-		exports._extend = function(origin, add) {
-			// Don't do anything if add isn't an object
-			if (!add || !isObject(add)) return origin;
-
-			var keys = Object.keys(add);
-			var i = keys.length;
-			while (i--) {
-				origin[keys[i]] = add[keys[i]];
-			}
-			return origin;
-		};
-
-		function hasOwnProperty(obj, prop) {
-			return Object.prototype.hasOwnProperty.call(obj, prop);
-		}
-
-	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./support/isBuffer":88,"_process":55,"inherits":87}],90:[function(require,module,exports){
-	arguments[4][30][0].apply(exports,arguments)
-},{"./chrome/chrome_shim":91,"./edge/edge_shim":93,"./firefox/firefox_shim":95,"./safari/safari_shim":97,"./utils":98,"dup":30}],91:[function(require,module,exports){
-
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-	var logging = require('../utils.js').log;
-	var browserDetails = require('../utils.js').browserDetails;
-
-	var chromeShim = {
-		shimMediaStream: function() {
-			window.MediaStream = window.MediaStream || window.webkitMediaStream;
-		},
-
-		shimOnTrack: function() {
-			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
-				window.RTCPeerConnection.prototype)) {
-				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
-					get: function() {
-						return this._ontrack;
-					},
-					set: function(f) {
-						var self = this;
-						if (this._ontrack) {
-							this.removeEventListener('track', this._ontrack);
-							this.removeEventListener('addstream', this._ontrackpoly);
-						}
-						this.addEventListener('track', this._ontrack = f);
-						this.addEventListener('addstream', this._ontrackpoly = function(e) {
-							// onaddstream does not fire when a track is added to an existing
-							// stream. But stream.onaddtrack is implemented so we use that.
-							e.stream.addEventListener('addtrack', function(te) {
-								var event = new Event('track');
-								event.track = te.track;
-								event.receiver = {track: te.track};
-								event.streams = [e.stream];
-								self.dispatchEvent(event);
-							});
-							e.stream.getTracks().forEach(function(track) {
-								var event = new Event('track');
-								event.track = track;
-								event.receiver = {track: track};
-								event.streams = [e.stream];
-								this.dispatchEvent(event);
-							}.bind(this));
-						}.bind(this));
-					}
-				});
-			}
-		},
-
-		shimSourceObject: function() {
-			if (typeof window === 'object') {
-				if (window.HTMLMediaElement &&
-					!('srcObject' in window.HTMLMediaElement.prototype)) {
-					// Shim the srcObject property, once, when HTMLMediaElement is found.
-					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
-						get: function() {
-							return this._srcObject;
-						},
-						set: function(stream) {
-							var self = this;
-							// Use _srcObject as a private property for this shim
-							this._srcObject = stream;
-							if (this.src) {
-								URL.revokeObjectURL(this.src);
-							}
-
-							if (!stream) {
-								this.src = '';
-								return;
-							}
-							this.src = URL.createObjectURL(stream);
-							// We need to recreate the blob url when a track is added or
-							// removed. Doing it manually since we want to avoid a recursion.
-							stream.addEventListener('addtrack', function() {
-								if (self.src) {
-									URL.revokeObjectURL(self.src);
-								}
-								self.src = URL.createObjectURL(stream);
-							});
-							stream.addEventListener('removetrack', function() {
-								if (self.src) {
-									URL.revokeObjectURL(self.src);
-								}
-								self.src = URL.createObjectURL(stream);
-							});
-						}
-					});
-				}
-			}
-		},
-
-		shimPeerConnection: function() {
-			// The RTCPeerConnection object.
-			window.RTCPeerConnection = function(pcConfig, pcConstraints) {
-				// Translate iceTransportPolicy to iceTransports,
-				// see https://code.google.com/p/webrtc/issues/detail?id=4869
-				logging('PeerConnection');
-				if (pcConfig && pcConfig.iceTransportPolicy) {
-					pcConfig.iceTransports = pcConfig.iceTransportPolicy;
-				}
-
-				var pc = new webkitRTCPeerConnection(pcConfig, pcConstraints);
-				var origGetStats = pc.getStats.bind(pc);
-				pc.getStats = function(selector, successCallback, errorCallback) {
-					var self = this;
-					var args = arguments;
-
-					// If selector is a function then we are in the old style stats so just
-					// pass back the original getStats format to avoid breaking old users.
-					if (arguments.length > 0 && typeof selector === 'function') {
-						return origGetStats(selector, successCallback);
-					}
-
-					var fixChromeStats_ = function(response) {
-						var standardReport = {};
-						var reports = response.result();
-						reports.forEach(function(report) {
-							var standardStats = {
-								id: report.id,
-								timestamp: report.timestamp,
-								type: report.type
-							};
-							report.names().forEach(function(name) {
-								standardStats[name] = report.stat(name);
-							});
-							standardReport[standardStats.id] = standardStats;
-						});
-
-						return standardReport;
-					};
-
-					// shim getStats with maplike support
-					var makeMapStats = function(stats, legacyStats) {
-						var map = new Map(Object.keys(stats).map(function(key) {
-							return[key, stats[key]];
-						}));
-						legacyStats = legacyStats || stats;
-						Object.keys(legacyStats).forEach(function(key) {
-							map[key] = legacyStats[key];
-						});
-						return map;
-					};
-
-					if (arguments.length >= 2) {
-						var successCallbackWrapper_ = function(response) {
-							args[1](makeMapStats(fixChromeStats_(response)));
-						};
-
-						return origGetStats.apply(this, [successCallbackWrapper_,
-							arguments[0]]);
-					}
-
-					// promise-support
-					return new Promise(function(resolve, reject) {
-						if (args.length === 1 && typeof selector === 'object') {
-							origGetStats.apply(self, [
-								function(response) {
-									resolve(makeMapStats(fixChromeStats_(response)));
-								}, reject]);
-						} else {
-							// Preserve legacy chrome stats only on legacy access of stats obj
-							origGetStats.apply(self, [
-								function(response) {
-									resolve(makeMapStats(fixChromeStats_(response),
-										response.result()));
-								}, reject]);
-						}
-					}).then(successCallback, errorCallback);
-				};
-
-				return pc;
-			};
-			window.RTCPeerConnection.prototype = webkitRTCPeerConnection.prototype;
-
-			// wrap static methods. Currently just generateCertificate.
-			if (webkitRTCPeerConnection.generateCertificate) {
-				Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
-					get: function() {
-						return webkitRTCPeerConnection.generateCertificate;
-					}
-				});
-			}
-
-			['createOffer', 'createAnswer'].forEach(function(method) {
-				var nativeMethod = webkitRTCPeerConnection.prototype[method];
-				webkitRTCPeerConnection.prototype[method] = function() {
-					var self = this;
-					if (arguments.length < 1 || (arguments.length === 1 &&
-						typeof arguments[0] === 'object')) {
-						var opts = arguments.length === 1 ? arguments[0] : undefined;
-						return new Promise(function(resolve, reject) {
-							nativeMethod.apply(self, [resolve, reject, opts]);
-						});
-					}
-					return nativeMethod.apply(this, arguments);
-				};
-			});
-
-			// add promise support -- natively available in Chrome 51
-			if (browserDetails.version < 51) {
-				['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-					.forEach(function(method) {
-						var nativeMethod = webkitRTCPeerConnection.prototype[method];
-						webkitRTCPeerConnection.prototype[method] = function() {
-							var args = arguments;
-							var self = this;
-							var promise = new Promise(function(resolve, reject) {
-								nativeMethod.apply(self, [args[0], resolve, reject]);
-							});
-							if (args.length < 2) {
-								return promise;
-							}
-							return promise.then(function() {
-									args[1].apply(null, []);
-								},
-								function(err) {
-									if (args.length >= 3) {
-										args[2].apply(null, [err]);
-									}
-								});
-						};
-					});
-			}
-
-			// shim implicit creation of RTCSessionDescription/RTCIceCandidate
-			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-				.forEach(function(method) {
-					var nativeMethod = webkitRTCPeerConnection.prototype[method];
-					webkitRTCPeerConnection.prototype[method] = function() {
-						arguments[0] = new ((method === 'addIceCandidate') ?
-							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
-						return nativeMethod.apply(this, arguments);
-					};
-				});
-
-			// support for addIceCandidate(null or undefined)
-			var nativeAddIceCandidate =
-				RTCPeerConnection.prototype.addIceCandidate;
-			RTCPeerConnection.prototype.addIceCandidate = function() {
-				if (!arguments[0]) {
-					if (arguments[1]) {
-						arguments[1].apply(null);
-					}
-					return Promise.resolve();
-				}
-				return nativeAddIceCandidate.apply(this, arguments);
-			};
-		}
-	};
-
-
-// Expose public methods.
-	module.exports = {
-		shimMediaStream: chromeShim.shimMediaStream,
-		shimOnTrack: chromeShim.shimOnTrack,
-		shimSourceObject: chromeShim.shimSourceObject,
-		shimPeerConnection: chromeShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia')
-	};
-
-},{"../utils.js":98,"./getusermedia":92}],92:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-	var logging = require('../utils.js').log;
-
-// Expose public methods.
-	module.exports = function() {
-		var constraintsToChrome_ = function(c) {
-			if (typeof c !== 'object' || c.mandatory || c.optional) {
-				return c;
-			}
-			var cc = {};
-			Object.keys(c).forEach(function(key) {
-				if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
-					return;
-				}
-				var r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};
-				if (r.exact !== undefined && typeof r.exact === 'number') {
-					r.min = r.max = r.exact;
-				}
-				var oldname_ = function(prefix, name) {
-					if (prefix) {
-						return prefix + name.charAt(0).toUpperCase() + name.slice(1);
-					}
-					return (name === 'deviceId') ? 'sourceId' : name;
-				};
-				if (r.ideal !== undefined) {
-					cc.optional = cc.optional || [];
-					var oc = {};
-					if (typeof r.ideal === 'number') {
-						oc[oldname_('min', key)] = r.ideal;
-						cc.optional.push(oc);
-						oc = {};
-						oc[oldname_('max', key)] = r.ideal;
-						cc.optional.push(oc);
-					} else {
-						oc[oldname_('', key)] = r.ideal;
-						cc.optional.push(oc);
-					}
-				}
-				if (r.exact !== undefined && typeof r.exact !== 'number') {
-					cc.mandatory = cc.mandatory || {};
-					cc.mandatory[oldname_('', key)] = r.exact;
-				} else {
-					['min', 'max'].forEach(function(mix) {
-						if (r[mix] !== undefined) {
-							cc.mandatory = cc.mandatory || {};
-							cc.mandatory[oldname_(mix, key)] = r[mix];
-						}
-					});
-				}
-			});
-			if (c.advanced) {
-				cc.optional = (cc.optional || []).concat(c.advanced);
-			}
-			return cc;
-		};
-
-		var shimConstraints_ = function(constraints, func) {
-			constraints = JSON.parse(JSON.stringify(constraints));
-			if (constraints && constraints.audio) {
-				constraints.audio = constraintsToChrome_(constraints.audio);
-			}
-			if (constraints && typeof constraints.video === 'object') {
-				// Shim facingMode for mobile, where it defaults to "user".
-				var face = constraints.video.facingMode;
-				face = face && ((typeof face === 'object') ? face : {ideal: face});
-
-				if ((face && (face.exact === 'user' || face.exact === 'environment' ||
-					face.ideal === 'user' || face.ideal === 'environment')) &&
-					!(navigator.mediaDevices.getSupportedConstraints &&
-					navigator.mediaDevices.getSupportedConstraints().facingMode)) {
-					delete constraints.video.facingMode;
-					if (face.exact === 'environment' || face.ideal === 'environment') {
-						// Look for "back" in label, or use last cam (typically back cam).
-						return navigator.mediaDevices.enumerateDevices()
-							.then(function(devices) {
-								devices = devices.filter(function(d) {
-									return d.kind === 'videoinput';
-								});
-								var back = devices.find(function(d) {
-										return d.label.toLowerCase().indexOf('back') !== -1;
-									}) || (devices.length && devices[devices.length - 1]);
-								if (back) {
-									constraints.video.deviceId = face.exact ? {exact: back.deviceId} :
-										{ideal: back.deviceId};
-								}
-								constraints.video = constraintsToChrome_(constraints.video);
-								logging('chrome: ' + JSON.stringify(constraints));
-								return func(constraints);
-							});
-					}
-				}
-				constraints.video = constraintsToChrome_(constraints.video);
-			}
-			logging('chrome: ' + JSON.stringify(constraints));
-			return func(constraints);
-		};
-
-		var shimError_ = function(e) {
-			return {
-				name: {
-					PermissionDeniedError: 'NotAllowedError',
-					ConstraintNotSatisfiedError: 'OverconstrainedError'
-				}[e.name] || e.name,
-				message: e.message,
-				constraint: e.constraintName,
-				toString: function() {
-					return this.name + (this.message && ': ') + this.message;
-				}
-			};
-		};
-
-		var getUserMedia_ = function(constraints, onSuccess, onError) {
-			shimConstraints_(constraints, function(c) {
-				navigator.webkitGetUserMedia(c, onSuccess, function(e) {
-					onError(shimError_(e));
-				});
-			});
-		};
-
-		navigator.getUserMedia = getUserMedia_;
-
-		// Returns the result of getUserMedia as a Promise.
-		var getUserMediaPromise_ = function(constraints) {
-			return new Promise(function(resolve, reject) {
-				navigator.getUserMedia(constraints, resolve, reject);
-			});
-		};
-
-		if (!navigator.mediaDevices) {
-			navigator.mediaDevices = {
-				getUserMedia: getUserMediaPromise_,
-				enumerateDevices: function() {
-					return new Promise(function(resolve) {
-						var kinds = {audio: 'audioinput', video: 'videoinput'};
-						return MediaStreamTrack.getSources(function(devices) {
-							resolve(devices.map(function(device) {
-								return {label: device.label,
-									kind: kinds[device.kind],
-									deviceId: device.id,
-									groupId: ''};
-							}));
-						});
-					});
-				}
-			};
-		}
-
-		// A shim for getUserMedia method on the mediaDevices object.
-		// TODO(KaptenJansson) remove once implemented in Chrome stable.
-		if (!navigator.mediaDevices.getUserMedia) {
-			navigator.mediaDevices.getUserMedia = function(constraints) {
-				return getUserMediaPromise_(constraints);
-			};
-		} else {
-			// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
-			// function which returns a Promise, it does not accept spec-style
-			// constraints.
-			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
-			bind(navigator.mediaDevices);
-			navigator.mediaDevices.getUserMedia = function(cs) {
-				return shimConstraints_(cs, function(c) {
-					return origGetUserMedia(c).then(function(stream) {
-						if (c.audio && !stream.getAudioTracks().length ||
-							c.video && !stream.getVideoTracks().length) {
-							stream.getTracks().forEach(function(track) {
-								track.stop();
-							});
-							throw new DOMException('', 'NotFoundError');
-						}
-						return stream;
-					}, function(e) {
-						return Promise.reject(shimError_(e));
-					});
-				});
-			};
-		}
-
-		// Dummy devicechange event methods.
-		// TODO(KaptenJansson) remove once implemented in Chrome stable.
-		if (typeof navigator.mediaDevices.addEventListener === 'undefined') {
-			navigator.mediaDevices.addEventListener = function() {
-				logging('Dummy mediaDevices.addEventListener called.');
-			};
-		}
-		if (typeof navigator.mediaDevices.removeEventListener === 'undefined') {
-			navigator.mediaDevices.removeEventListener = function() {
-				logging('Dummy mediaDevices.removeEventListener called.');
-			};
-		}
-	};
-
-},{"../utils.js":98}],93:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var SDPUtils = require('sdp');
-	var browserDetails = require('../utils').browserDetails;
-
-	var edgeShim = {
-		shimPeerConnection: function() {
-			if (window.RTCIceGatherer) {
-				// ORTC defines an RTCIceCandidate object but no constructor.
-				// Not implemented in Edge.
-				if (!window.RTCIceCandidate) {
-					window.RTCIceCandidate = function(args) {
-						return args;
-					};
-				}
-				// ORTC does not have a session description object but
-				// other browsers (i.e. Chrome) that will support both PC and ORTC
-				// in the future might have this defined already.
-				if (!window.RTCSessionDescription) {
-					window.RTCSessionDescription = function(args) {
-						return args;
-					};
-				}
-				// this adds an additional event listener to MediaStrackTrack that signals
-				// when a tracks enabled property was changed.
-				var origMSTEnabled = Object.getOwnPropertyDescriptor(
-					MediaStreamTrack.prototype, 'enabled');
-				Object.defineProperty(MediaStreamTrack.prototype, 'enabled', {
-					set: function(value) {
-						origMSTEnabled.set.call(this, value);
-						var ev = new Event('enabled');
-						ev.enabled = value;
-						this.dispatchEvent(ev);
-					}
-				});
-			}
-
-			window.RTCPeerConnection = function(config) {
-				var self = this;
-
-				var _eventTarget = document.createDocumentFragment();
-				['addEventListener', 'removeEventListener', 'dispatchEvent']
-					.forEach(function(method) {
-						self[method] = _eventTarget[method].bind(_eventTarget);
-					});
-
-				this.onicecandidate = null;
-				this.onaddstream = null;
-				this.ontrack = null;
-				this.onremovestream = null;
-				this.onsignalingstatechange = null;
-				this.oniceconnectionstatechange = null;
-				this.onnegotiationneeded = null;
-				this.ondatachannel = null;
-
-				this.localStreams = [];
-				this.remoteStreams = [];
-				this.getLocalStreams = function() {
-					return self.localStreams;
-				};
-				this.getRemoteStreams = function() {
-					return self.remoteStreams;
-				};
-
-				this.localDescription = new RTCSessionDescription({
-					type: '',
-					sdp: ''
-				});
-				this.remoteDescription = new RTCSessionDescription({
-					type: '',
-					sdp: ''
-				});
-				this.signalingState = 'stable';
-				this.iceConnectionState = 'new';
-				this.iceGatheringState = 'new';
-
-				this.iceOptions = {
-					gatherPolicy: 'all',
-					iceServers: []
-				};
-				if (config && config.iceTransportPolicy) {
-					switch (config.iceTransportPolicy) {
-						case 'all':
-						case 'relay':
-							this.iceOptions.gatherPolicy = config.iceTransportPolicy;
-							break;
-						case 'none':
-							// FIXME: remove once implementation and spec have added this.
-							throw new TypeError('iceTransportPolicy "none" not supported');
-						default:
-							// don't set iceTransportPolicy.
-							break;
-					}
-				}
-				this.usingBundle = config && config.bundlePolicy === 'max-bundle';
-
-				if (config && config.iceServers) {
-					// Edge does not like
-					// 1) stun:
-					// 2) turn: that does not have all of turn:host:port?transport=udp
-					// 3) turn: with ipv6 addresses
-					var iceServers = JSON.parse(JSON.stringify(config.iceServers));
-					this.iceOptions.iceServers = iceServers.filter(function(server) {
-						if (server && server.urls) {
-							var urls = server.urls;
-							if (typeof urls === 'string') {
-								urls = [urls];
-							}
-							urls = urls.filter(function(url) {
-								return (url.indexOf('turn:') === 0 &&
-									url.indexOf('transport=udp') !== -1 &&
-									url.indexOf('turn:[') === -1) ||
-									(url.indexOf('stun:') === 0 &&
-									browserDetails.version >= 14393);
-							})[0];
-							return !!urls;
-						}
-						return false;
-					});
-				}
-				this._config = config;
-
-				// per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
-				// everything that is needed to describe a SDP m-line.
-				this.transceivers = [];
-
-				// since the iceGatherer is currently created in createOffer but we
-				// must not emit candidates until after setLocalDescription we buffer
-				// them in this array.
-				this._localIceCandidatesBuffer = [];
-			};
-
-			window.RTCPeerConnection.prototype._emitBufferedCandidates = function() {
-				var self = this;
-				var sections = SDPUtils.splitSections(self.localDescription.sdp);
-				// FIXME: need to apply ice candidates in a way which is async but
-				// in-order
-				this._localIceCandidatesBuffer.forEach(function(event) {
-					var end = !event.candidate || Object.keys(event.candidate).length === 0;
-					if (end) {
-						for (var j = 1; j < sections.length; j++) {
-							if (sections[j].indexOf('\r\na=end-of-candidates\r\n') === -1) {
-								sections[j] += 'a=end-of-candidates\r\n';
-							}
-						}
-					} else if (event.candidate.candidate.indexOf('typ endOfCandidates')
-						=== -1) {
-						sections[event.candidate.sdpMLineIndex + 1] +=
-							'a=' + event.candidate.candidate + '\r\n';
-					}
-					self.localDescription.sdp = sections.join('');
-					self.dispatchEvent(event);
-					if (self.onicecandidate !== null) {
-						self.onicecandidate(event);
-					}
-					if (!event.candidate && self.iceGatheringState !== 'complete') {
-						var complete = self.transceivers.every(function(transceiver) {
-							return transceiver.iceGatherer &&
-								transceiver.iceGatherer.state === 'completed';
-						});
-						if (complete) {
-							self.iceGatheringState = 'complete';
-						}
-					}
-				});
-				this._localIceCandidatesBuffer = [];
-			};
-
-			window.RTCPeerConnection.prototype.getConfiguration = function() {
-				return this._config;
-			};
-
-			window.RTCPeerConnection.prototype.addStream = function(stream) {
-				// Clone is necessary for local demos mostly, attaching directly
-				// to two different senders does not work (build 10547).
-				var clonedStream = stream.clone();
-				stream.getTracks().forEach(function(track, idx) {
-					var clonedTrack = clonedStream.getTracks()[idx];
-					track.addEventListener('enabled', function(event) {
-						clonedTrack.enabled = event.enabled;
-					});
-				});
-				this.localStreams.push(clonedStream);
-				this._maybeFireNegotiationNeeded();
-			};
-
-			window.RTCPeerConnection.prototype.removeStream = function(stream) {
-				var idx = this.localStreams.indexOf(stream);
-				if (idx > -1) {
-					this.localStreams.splice(idx, 1);
-					this._maybeFireNegotiationNeeded();
-				}
-			};
-
-			window.RTCPeerConnection.prototype.getSenders = function() {
-				return this.transceivers.filter(function(transceiver) {
-					return !!transceiver.rtpSender;
-				})
-					.map(function(transceiver) {
-						return transceiver.rtpSender;
-					});
-			};
-
-			window.RTCPeerConnection.prototype.getReceivers = function() {
-				return this.transceivers.filter(function(transceiver) {
-					return !!transceiver.rtpReceiver;
-				})
-					.map(function(transceiver) {
-						return transceiver.rtpReceiver;
-					});
-			};
-
-			// Determines the intersection of local and remote capabilities.
-			window.RTCPeerConnection.prototype._getCommonCapabilities =
-				function(localCapabilities, remoteCapabilities) {
-					var commonCapabilities = {
-						codecs: [],
-						headerExtensions: [],
-						fecMechanisms: []
-					};
-					localCapabilities.codecs.forEach(function(lCodec) {
-						for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
-							var rCodec = remoteCapabilities.codecs[i];
-							if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
-								lCodec.clockRate === rCodec.clockRate) {
-								// number of channels is the highest common number of channels
-								rCodec.numChannels = Math.min(lCodec.numChannels,
-									rCodec.numChannels);
-								// push rCodec so we reply with offerer payload type
-								commonCapabilities.codecs.push(rCodec);
-
-								// determine common feedback mechanisms
-								rCodec.rtcpFeedback = rCodec.rtcpFeedback.filter(function(fb) {
-									for (var j = 0; j < lCodec.rtcpFeedback.length; j++) {
-										if (lCodec.rtcpFeedback[j].type === fb.type &&
-											lCodec.rtcpFeedback[j].parameter === fb.parameter) {
-											return true;
-										}
-									}
-									return false;
-								});
-								// FIXME: also need to determine .parameters
-								//  see https://github.com/openpeer/ortc/issues/569
-								break;
-							}
-						}
-					});
-
-					localCapabilities.headerExtensions
-						.forEach(function(lHeaderExtension) {
-							for (var i = 0; i < remoteCapabilities.headerExtensions.length;
-								 i++) {
-								var rHeaderExtension = remoteCapabilities.headerExtensions[i];
-								if (lHeaderExtension.uri === rHeaderExtension.uri) {
-									commonCapabilities.headerExtensions.push(rHeaderExtension);
-									break;
-								}
-							}
-						});
-
-					// FIXME: fecMechanisms
-					return commonCapabilities;
-				};
-
-			// Create ICE gatherer, ICE transport and DTLS transport.
-			window.RTCPeerConnection.prototype._createIceAndDtlsTransports =
-				function(mid, sdpMLineIndex) {
-					var self = this;
-					var iceGatherer = new RTCIceGatherer(self.iceOptions);
-					var iceTransport = new RTCIceTransport(iceGatherer);
-					iceGatherer.onlocalcandidate = function(evt) {
-						var event = new Event('icecandidate');
-						event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};
-
-						var cand = evt.candidate;
-						var end = !cand || Object.keys(cand).length === 0;
-						// Edge emits an empty object for RTCIceCandidateComplete‥
-						if (end) {
-							// polyfill since RTCIceGatherer.state is not implemented in
-							// Edge 10547 yet.
-							if (iceGatherer.state === undefined) {
-								iceGatherer.state = 'completed';
-							}
-
-							// Emit a candidate with type endOfCandidates to make the samples
-							// work. Edge requires addIceCandidate with this empty candidate
-							// to start checking. The real solution is to signal
-							// end-of-candidates to the other side when getting the null
-							// candidate but some apps (like the samples) don't do that.
-							event.candidate.candidate =
-								'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
-						} else {
-							// RTCIceCandidate doesn't have a component, needs to be added
-							cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
-							event.candidate.candidate = SDPUtils.writeCandidate(cand);
-						}
-
-						// update local description.
-						var sections = SDPUtils.splitSections(self.localDescription.sdp);
-						if (event.candidate.candidate.indexOf('typ endOfCandidates')
-							=== -1) {
-							sections[event.candidate.sdpMLineIndex + 1] +=
-								'a=' + event.candidate.candidate + '\r\n';
-						} else {
-							sections[event.candidate.sdpMLineIndex + 1] +=
-								'a=end-of-candidates\r\n';
-						}
-						self.localDescription.sdp = sections.join('');
-
-						var complete = self.transceivers.every(function(transceiver) {
-							return transceiver.iceGatherer &&
-								transceiver.iceGatherer.state === 'completed';
-						});
-
-						// Emit candidate if localDescription is set.
-						// Also emits null candidate when all gatherers are complete.
-						switch (self.iceGatheringState) {
-							case 'new':
-								self._localIceCandidatesBuffer.push(event);
-								if (end && complete) {
-									self._localIceCandidatesBuffer.push(
-										new Event('icecandidate'));
-								}
-								break;
-							case 'gathering':
-								self._emitBufferedCandidates();
-								self.dispatchEvent(event);
-								if (self.onicecandidate !== null) {
-									self.onicecandidate(event);
-								}
-								if (complete) {
-									self.dispatchEvent(new Event('icecandidate'));
-									if (self.onicecandidate !== null) {
-										self.onicecandidate(new Event('icecandidate'));
-									}
-									self.iceGatheringState = 'complete';
-								}
-								break;
-							case 'complete':
-								// should not happen... currently!
-								break;
-							default: // no-op.
-								break;
-						}
-					};
-					iceTransport.onicestatechange = function() {
-						self._updateConnectionState();
-					};
-
-					var dtlsTransport = new RTCDtlsTransport(iceTransport);
-					dtlsTransport.ondtlsstatechange = function() {
-						self._updateConnectionState();
-					};
-					dtlsTransport.onerror = function() {
-						// onerror does not set state to failed by itself.
-						dtlsTransport.state = 'failed';
-						self._updateConnectionState();
-					};
-
-					return {
-						iceGatherer: iceGatherer,
-						iceTransport: iceTransport,
-						dtlsTransport: dtlsTransport
-					};
-				};
-
-			// Start the RTP Sender and Receiver for a transceiver.
-			window.RTCPeerConnection.prototype._transceive = function(transceiver,
-																	  send, recv) {
-				var params = this._getCommonCapabilities(transceiver.localCapabilities,
-					transceiver.remoteCapabilities);
-				if (send && transceiver.rtpSender) {
-					params.encodings = transceiver.sendEncodingParameters;
-					params.rtcp = {
-						cname: SDPUtils.localCName
-					};
-					if (transceiver.recvEncodingParameters.length) {
-						params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
-					}
-					transceiver.rtpSender.send(params);
-				}
-				if (recv && transceiver.rtpReceiver) {
-					// remove RTX field in Edge 14942
-					if (transceiver.kind === 'video'
-						&& transceiver.recvEncodingParameters) {
-						transceiver.recvEncodingParameters.forEach(function(p) {
-							delete p.rtx;
-						});
-					}
-					params.encodings = transceiver.recvEncodingParameters;
-					params.rtcp = {
-						cname: transceiver.cname
-					};
-					if (transceiver.sendEncodingParameters.length) {
-						params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
-					}
-					transceiver.rtpReceiver.receive(params);
-				}
-			};
-
-			window.RTCPeerConnection.prototype.setLocalDescription =
-				function(description) {
-					var self = this;
-					var sections;
-					var sessionpart;
-					if (description.type === 'offer') {
-						// FIXME: What was the purpose of this empty if statement?
-						// if (!this._pendingOffer) {
-						// } else {
-						if (this._pendingOffer) {
-							// VERY limited support for SDP munging. Limited to:
-							// * changing the order of codecs
-							sections = SDPUtils.splitSections(description.sdp);
-							sessionpart = sections.shift();
-							sections.forEach(function(mediaSection, sdpMLineIndex) {
-								var caps = SDPUtils.parseRtpParameters(mediaSection);
-								self._pendingOffer[sdpMLineIndex].localCapabilities = caps;
-							});
-							this.transceivers = this._pendingOffer;
-							delete this._pendingOffer;
-						}
-					} else if (description.type === 'answer') {
-						sections = SDPUtils.splitSections(self.remoteDescription.sdp);
-						sessionpart = sections.shift();
-						var isIceLite = SDPUtils.matchPrefix(sessionpart,
-								'a=ice-lite').length > 0;
-						sections.forEach(function(mediaSection, sdpMLineIndex) {
-							var transceiver = self.transceivers[sdpMLineIndex];
-							var iceGatherer = transceiver.iceGatherer;
-							var iceTransport = transceiver.iceTransport;
-							var dtlsTransport = transceiver.dtlsTransport;
-							var localCapabilities = transceiver.localCapabilities;
-							var remoteCapabilities = transceiver.remoteCapabilities;
-
-							var rejected = mediaSection.split('\n', 1)[0]
-									.split(' ', 2)[1] === '0';
-
-							if (!rejected && !transceiver.isDatachannel) {
-								var remoteIceParameters = SDPUtils.getIceParameters(
-									mediaSection, sessionpart);
-								if (isIceLite) {
-									var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
-										.map(function(cand) {
-											return SDPUtils.parseCandidate(cand);
-										})
-										.filter(function(cand) {
-											return cand.component === '1';
-										});
-									// ice-lite only includes host candidates in the SDP so we can
-									// use setRemoteCandidates (which implies an
-									// RTCIceCandidateComplete)
-									if (cands.length) {
-										iceTransport.setRemoteCandidates(cands);
-									}
-								}
-								var remoteDtlsParameters = SDPUtils.getDtlsParameters(
-									mediaSection, sessionpart);
-								if (isIceLite) {
-									remoteDtlsParameters.role = 'server';
-								}
-
-								if (!self.usingBundle || sdpMLineIndex === 0) {
-									iceTransport.start(iceGatherer, remoteIceParameters,
-										isIceLite ? 'controlling' : 'controlled');
-									dtlsTransport.start(remoteDtlsParameters);
-								}
-
-								// Calculate intersection of capabilities.
-								var params = self._getCommonCapabilities(localCapabilities,
-									remoteCapabilities);
-
-								// Start the RTCRtpSender. The RTCRtpReceiver for this
-								// transceiver has already been started in setRemoteDescription.
-								self._transceive(transceiver,
-									params.codecs.length > 0,
-									false);
-							}
-						});
-					}
-
-					this.localDescription = {
-						type: description.type,
-						sdp: description.sdp
-					};
-					switch (description.type) {
-						case 'offer':
-							this._updateSignalingState('have-local-offer');
-							break;
-						case 'answer':
-							this._updateSignalingState('stable');
-							break;
-						default:
-							throw new TypeError('unsupported type "' + description.type +
-								'"');
-					}
-
-					// If a success callback was provided, emit ICE candidates after it
-					// has been executed. Otherwise, emit callback after the Promise is
-					// resolved.
-					var hasCallback = arguments.length > 1 &&
-						typeof arguments[1] === 'function';
-					if (hasCallback) {
-						var cb = arguments[1];
-						window.setTimeout(function() {
-							cb();
-							if (self.iceGatheringState === 'new') {
-								self.iceGatheringState = 'gathering';
-							}
-							self._emitBufferedCandidates();
-						}, 0);
-					}
-					var p = Promise.resolve();
-					p.then(function() {
-						if (!hasCallback) {
-							if (self.iceGatheringState === 'new') {
-								self.iceGatheringState = 'gathering';
-							}
-							// Usually candidates will be emitted earlier.
-							window.setTimeout(self._emitBufferedCandidates.bind(self), 500);
-						}
-					});
-					return p;
-				};
-
-			window.RTCPeerConnection.prototype.setRemoteDescription =
-				function(description) {
-					var self = this;
-					var stream = new MediaStream();
-					var receiverList = [];
-					var sections = SDPUtils.splitSections(description.sdp);
-					var sessionpart = sections.shift();
-					var isIceLite = SDPUtils.matchPrefix(sessionpart,
-							'a=ice-lite').length > 0;
-					this.usingBundle = SDPUtils.matchPrefix(sessionpart,
-							'a=group:BUNDLE ').length > 0;
-					sections.forEach(function(mediaSection, sdpMLineIndex) {
-						var lines = SDPUtils.splitLines(mediaSection);
-						var mline = lines[0].substr(2).split(' ');
-						var kind = mline[0];
-						var rejected = mline[1] === '0';
-						var direction = SDPUtils.getDirection(mediaSection, sessionpart);
-
-						var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:');
-						if (mid.length) {
-							mid = mid[0].substr(6);
-						} else {
-							mid = SDPUtils.generateIdentifier();
-						}
-
-						// Reject datachannels which are not implemented yet.
-						if (kind === 'application' && mline[2] === 'DTLS/SCTP') {
-							self.transceivers[sdpMLineIndex] = {
-								mid: mid,
-								isDatachannel: true
-							};
-							return;
-						}
-
-						var transceiver;
-						var iceGatherer;
-						var iceTransport;
-						var dtlsTransport;
-						var rtpSender;
-						var rtpReceiver;
-						var sendEncodingParameters;
-						var recvEncodingParameters;
-						var localCapabilities;
-
-						var track;
-						// FIXME: ensure the mediaSection has rtcp-mux set.
-						var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
-						var remoteIceParameters;
-						var remoteDtlsParameters;
-						if (!rejected) {
-							remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
-								sessionpart);
-							remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
-								sessionpart);
-							remoteDtlsParameters.role = 'client';
-						}
-						recvEncodingParameters =
-							SDPUtils.parseRtpEncodingParameters(mediaSection);
-
-						var cname;
-						// Gets the first SSRC. Note that with RTX there might be multiple
-						// SSRCs.
-						var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
-							.map(function(line) {
-								return SDPUtils.parseSsrcMedia(line);
-							})
-							.filter(function(obj) {
-								return obj.attribute === 'cname';
-							})[0];
-						if (remoteSsrc) {
-							cname = remoteSsrc.value;
-						}
-
-						var isComplete = SDPUtils.matchPrefix(mediaSection,
-								'a=end-of-candidates', sessionpart).length > 0;
-						var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
-							.map(function(cand) {
-								return SDPUtils.parseCandidate(cand);
-							})
-							.filter(function(cand) {
-								return cand.component === '1';
-							});
-						if (description.type === 'offer' && !rejected) {
-							var transports = self.usingBundle && sdpMLineIndex > 0 ? {
-									iceGatherer: self.transceivers[0].iceGatherer,
-									iceTransport: self.transceivers[0].iceTransport,
-									dtlsTransport: self.transceivers[0].dtlsTransport
-								} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);
-
-							if (isComplete) {
-								transports.iceTransport.setRemoteCandidates(cands);
-							}
-
-							localCapabilities = RTCRtpReceiver.getCapabilities(kind);
-
-							// filter RTX until additional stuff needed for RTX is implemented
-							// in adapter.js
-							localCapabilities.codecs = localCapabilities.codecs.filter(
-								function(codec) {
-									return codec.name !== 'rtx';
-								});
-
-							sendEncodingParameters = [{
-								ssrc: (2 * sdpMLineIndex + 2) * 1001
-							}];
-
-							rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
-
-							track = rtpReceiver.track;
-							receiverList.push([track, rtpReceiver]);
-							// FIXME: not correct when there are multiple streams but that is
-							// not currently supported in this shim.
-							stream.addTrack(track);
-
-							// FIXME: look at direction.
-							if (self.localStreams.length > 0 &&
-								self.localStreams[0].getTracks().length >= sdpMLineIndex) {
-								var localTrack;
-								if (kind === 'audio') {
-									localTrack = self.localStreams[0].getAudioTracks()[0];
-								} else if (kind === 'video') {
-									localTrack = self.localStreams[0].getVideoTracks()[0];
-								}
-								if (localTrack) {
-									rtpSender = new RTCRtpSender(localTrack,
-										transports.dtlsTransport);
-								}
-							}
-
-							self.transceivers[sdpMLineIndex] = {
-								iceGatherer: transports.iceGatherer,
-								iceTransport: transports.iceTransport,
-								dtlsTransport: transports.dtlsTransport,
-								localCapabilities: localCapabilities,
-								remoteCapabilities: remoteCapabilities,
-								rtpSender: rtpSender,
-								rtpReceiver: rtpReceiver,
-								kind: kind,
-								mid: mid,
-								cname: cname,
-								sendEncodingParameters: sendEncodingParameters,
-								recvEncodingParameters: recvEncodingParameters
-							};
-							// Start the RTCRtpReceiver now. The RTPSender is started in
-							// setLocalDescription.
-							self._transceive(self.transceivers[sdpMLineIndex],
-								false,
-								direction === 'sendrecv' || direction === 'sendonly');
-						} else if (description.type === 'answer' && !rejected) {
-							transceiver = self.transceivers[sdpMLineIndex];
-							iceGatherer = transceiver.iceGatherer;
-							iceTransport = transceiver.iceTransport;
-							dtlsTransport = transceiver.dtlsTransport;
-							rtpSender = transceiver.rtpSender;
-							rtpReceiver = transceiver.rtpReceiver;
-							sendEncodingParameters = transceiver.sendEncodingParameters;
-							localCapabilities = transceiver.localCapabilities;
-
-							self.transceivers[sdpMLineIndex].recvEncodingParameters =
-								recvEncodingParameters;
-							self.transceivers[sdpMLineIndex].remoteCapabilities =
-								remoteCapabilities;
-							self.transceivers[sdpMLineIndex].cname = cname;
-
-							if ((isIceLite || isComplete) && cands.length) {
-								iceTransport.setRemoteCandidates(cands);
-							}
-							if (!self.usingBundle || sdpMLineIndex === 0) {
-								iceTransport.start(iceGatherer, remoteIceParameters,
-									'controlling');
-								dtlsTransport.start(remoteDtlsParameters);
-							}
-
-							self._transceive(transceiver,
-								direction === 'sendrecv' || direction === 'recvonly',
-								direction === 'sendrecv' || direction === 'sendonly');
-
-							if (rtpReceiver &&
-								(direction === 'sendrecv' || direction === 'sendonly')) {
-								track = rtpReceiver.track;
-								receiverList.push([track, rtpReceiver]);
-								stream.addTrack(track);
-							} else {
-								// FIXME: actually the receiver should be created later.
-								delete transceiver.rtpReceiver;
-							}
-						}
-					});
-
-					this.remoteDescription = {
-						type: description.type,
-						sdp: description.sdp
-					};
-					switch (description.type) {
-						case 'offer':
-							this._updateSignalingState('have-remote-offer');
-							break;
-						case 'answer':
-							this._updateSignalingState('stable');
-							break;
-						default:
-							throw new TypeError('unsupported type "' + description.type +
-								'"');
-					}
-					if (stream.getTracks().length) {
-						self.remoteStreams.push(stream);
-						window.setTimeout(function() {
-							var event = new Event('addstream');
-							event.stream = stream;
-							self.dispatchEvent(event);
-							if (self.onaddstream !== null) {
-								window.setTimeout(function() {
-									self.onaddstream(event);
-								}, 0);
-							}
-
-							receiverList.forEach(function(item) {
-								var track = item[0];
-								var receiver = item[1];
-								var trackEvent = new Event('track');
-								trackEvent.track = track;
-								trackEvent.receiver = receiver;
-								trackEvent.streams = [stream];
-								self.dispatchEvent(event);
-								if (self.ontrack !== null) {
-									window.setTimeout(function() {
-										self.ontrack(trackEvent);
-									}, 0);
-								}
-							});
-						}, 0);
-					}
-					if (arguments.length > 1 && typeof arguments[1] === 'function') {
-						window.setTimeout(arguments[1], 0);
-					}
-					return Promise.resolve();
-				};
-
-			window.RTCPeerConnection.prototype.close = function() {
-				this.transceivers.forEach(function(transceiver) {
-					/* not yet
-					 if (transceiver.iceGatherer) {
-					 transceiver.iceGatherer.close();
-					 }
-					 */
-					if (transceiver.iceTransport) {
-						transceiver.iceTransport.stop();
-					}
-					if (transceiver.dtlsTransport) {
-						transceiver.dtlsTransport.stop();
-					}
-					if (transceiver.rtpSender) {
-						transceiver.rtpSender.stop();
-					}
-					if (transceiver.rtpReceiver) {
-						transceiver.rtpReceiver.stop();
-					}
-				});
-				// FIXME: clean up tracks, local streams, remote streams, etc
-				this._updateSignalingState('closed');
-			};
-
-			// Update the signaling state.
-			window.RTCPeerConnection.prototype._updateSignalingState =
-				function(newState) {
-					this.signalingState = newState;
-					var event = new Event('signalingstatechange');
-					this.dispatchEvent(event);
-					if (this.onsignalingstatechange !== null) {
-						this.onsignalingstatechange(event);
-					}
-				};
-
-			// Determine whether to fire the negotiationneeded event.
-			window.RTCPeerConnection.prototype._maybeFireNegotiationNeeded =
-				function() {
-					// Fire away (for now).
-					var event = new Event('negotiationneeded');
-					this.dispatchEvent(event);
-					if (this.onnegotiationneeded !== null) {
-						this.onnegotiationneeded(event);
-					}
-				};
-
-			// Update the connection state.
-			window.RTCPeerConnection.prototype._updateConnectionState = function() {
-				var self = this;
-				var newState;
-				var states = {
-					'new': 0,
-					closed: 0,
-					connecting: 0,
-					checking: 0,
-					connected: 0,
-					completed: 0,
-					failed: 0
-				};
-				this.transceivers.forEach(function(transceiver) {
-					states[transceiver.iceTransport.state]++;
-					states[transceiver.dtlsTransport.state]++;
-				});
-				// ICETransport.completed and connected are the same for this purpose.
-				states.connected += states.completed;
-
-				newState = 'new';
-				if (states.failed > 0) {
-					newState = 'failed';
-				} else if (states.connecting > 0 || states.checking > 0) {
-					newState = 'connecting';
-				} else if (states.disconnected > 0) {
-					newState = 'disconnected';
-				} else if (states.new > 0) {
-					newState = 'new';
-				} else if (states.connected > 0 || states.completed > 0) {
-					newState = 'connected';
-				}
-
-				if (newState !== self.iceConnectionState) {
-					self.iceConnectionState = newState;
-					var event = new Event('iceconnectionstatechange');
-					this.dispatchEvent(event);
-					if (this.oniceconnectionstatechange !== null) {
-						this.oniceconnectionstatechange(event);
-					}
-				}
-			};
-
-			window.RTCPeerConnection.prototype.createOffer = function() {
-				var self = this;
-				if (this._pendingOffer) {
-					throw new Error('createOffer called while there is a pending offer.');
-				}
-				var offerOptions;
-				if (arguments.length === 1 && typeof arguments[0] !== 'function') {
-					offerOptions = arguments[0];
-				} else if (arguments.length === 3) {
-					offerOptions = arguments[2];
-				}
-
-				var tracks = [];
-				var numAudioTracks = 0;
-				var numVideoTracks = 0;
-				// Default to sendrecv.
-				if (this.localStreams.length) {
-					numAudioTracks = this.localStreams[0].getAudioTracks().length;
-					numVideoTracks = this.localStreams[0].getVideoTracks().length;
-				}
-				// Determine number of audio and video tracks we need to send/recv.
-				if (offerOptions) {
-					// Reject Chrome legacy constraints.
-					if (offerOptions.mandatory || offerOptions.optional) {
-						throw new TypeError(
-							'Legacy mandatory/optional constraints not supported.');
-					}
-					if (offerOptions.offerToReceiveAudio !== undefined) {
-						numAudioTracks = offerOptions.offerToReceiveAudio;
-					}
-					if (offerOptions.offerToReceiveVideo !== undefined) {
-						numVideoTracks = offerOptions.offerToReceiveVideo;
-					}
-				}
-				if (this.localStreams.length) {
-					// Push local streams.
-					this.localStreams[0].getTracks().forEach(function(track) {
-						tracks.push({
-							kind: track.kind,
-							track: track,
-							wantReceive: track.kind === 'audio' ?
-								numAudioTracks > 0 : numVideoTracks > 0
-						});
-						if (track.kind === 'audio') {
-							numAudioTracks--;
-						} else if (track.kind === 'video') {
-							numVideoTracks--;
-						}
-					});
-				}
-				// Create M-lines for recvonly streams.
-				while (numAudioTracks > 0 || numVideoTracks > 0) {
-					if (numAudioTracks > 0) {
-						tracks.push({
-							kind: 'audio',
-							wantReceive: true
-						});
-						numAudioTracks--;
-					}
-					if (numVideoTracks > 0) {
-						tracks.push({
-							kind: 'video',
-							wantReceive: true
-						});
-						numVideoTracks--;
-					}
-				}
-
-				var sdp = SDPUtils.writeSessionBoilerplate();
-				var transceivers = [];
-				tracks.forEach(function(mline, sdpMLineIndex) {
-					// For each track, create an ice gatherer, ice transport,
-					// dtls transport, potentially rtpsender and rtpreceiver.
-					var track = mline.track;
-					var kind = mline.kind;
-					var mid = SDPUtils.generateIdentifier();
-
-					var transports = self.usingBundle && sdpMLineIndex > 0 ? {
-							iceGatherer: transceivers[0].iceGatherer,
-							iceTransport: transceivers[0].iceTransport,
-							dtlsTransport: transceivers[0].dtlsTransport
-						} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);
-
-					var localCapabilities = RTCRtpSender.getCapabilities(kind);
-					// filter RTX until additional stuff needed for RTX is implemented
-					// in adapter.js
-					localCapabilities.codecs = localCapabilities.codecs.filter(
-						function(codec) {
-							return codec.name !== 'rtx';
-						});
-					localCapabilities.codecs.forEach(function(codec) {
-						// work around https://bugs.chromium.org/p/webrtc/issues/detail?id=6552
-						// by adding level-asymmetry-allowed=1
-						if (codec.name === 'H264' &&
-							codec.parameters['level-asymmetry-allowed'] === undefined) {
-							codec.parameters['level-asymmetry-allowed'] = '1';
-						}
-					});
-
-					var rtpSender;
-					var rtpReceiver;
-
-					// generate an ssrc now, to be used later in rtpSender.send
-					var sendEncodingParameters = [{
-						ssrc: (2 * sdpMLineIndex + 1) * 1001
-					}];
-					if (track) {
-						rtpSender = new RTCRtpSender(track, transports.dtlsTransport);
-					}
-
-					if (mline.wantReceive) {
-						rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
-					}
-
-					transceivers[sdpMLineIndex] = {
-						iceGatherer: transports.iceGatherer,
-						iceTransport: transports.iceTransport,
-						dtlsTransport: transports.dtlsTransport,
-						localCapabilities: localCapabilities,
-						remoteCapabilities: null,
-						rtpSender: rtpSender,
-						rtpReceiver: rtpReceiver,
-						kind: kind,
-						mid: mid,
-						sendEncodingParameters: sendEncodingParameters,
-						recvEncodingParameters: null
-					};
-				});
-				if (this.usingBundle) {
-					sdp += 'a=group:BUNDLE ' + transceivers.map(function(t) {
-							return t.mid;
-						}).join(' ') + '\r\n';
-				}
-				tracks.forEach(function(mline, sdpMLineIndex) {
-					var transceiver = transceivers[sdpMLineIndex];
-					sdp += SDPUtils.writeMediaSection(transceiver,
-						transceiver.localCapabilities, 'offer', self.localStreams[0]);
-				});
-
-				this._pendingOffer = transceivers;
-				var desc = new RTCSessionDescription({
-					type: 'offer',
-					sdp: sdp
-				});
-				if (arguments.length && typeof arguments[0] === 'function') {
-					window.setTimeout(arguments[0], 0, desc);
-				}
-				return Promise.resolve(desc);
-			};
-
-			window.RTCPeerConnection.prototype.createAnswer = function() {
-				var self = this;
-
-				var sdp = SDPUtils.writeSessionBoilerplate();
-				if (this.usingBundle) {
-					sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) {
-							return t.mid;
-						}).join(' ') + '\r\n';
-				}
-				this.transceivers.forEach(function(transceiver) {
-					if (transceiver.isDatachannel) {
-						sdp += 'm=application 0 DTLS/SCTP 5000\r\n' +
-							'c=IN IP4 0.0.0.0\r\n' +
-							'a=mid:' + transceiver.mid + '\r\n';
-						return;
-					}
-					// Calculate intersection of capabilities.
-					var commonCapabilities = self._getCommonCapabilities(
-						transceiver.localCapabilities,
-						transceiver.remoteCapabilities);
-
-					sdp += SDPUtils.writeMediaSection(transceiver, commonCapabilities,
-						'answer', self.localStreams[0]);
-				});
-
-				var desc = new RTCSessionDescription({
-					type: 'answer',
-					sdp: sdp
-				});
-				if (arguments.length && typeof arguments[0] === 'function') {
-					window.setTimeout(arguments[0], 0, desc);
-				}
-				return Promise.resolve(desc);
-			};
-
-			window.RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
-				if (!candidate) {
-					this.transceivers.forEach(function(transceiver) {
-						transceiver.iceTransport.addRemoteCandidate({});
-					});
-				} else {
-					var mLineIndex = candidate.sdpMLineIndex;
-					if (candidate.sdpMid) {
-						for (var i = 0; i < this.transceivers.length; i++) {
-							if (this.transceivers[i].mid === candidate.sdpMid) {
-								mLineIndex = i;
-								break;
-							}
-						}
-					}
-					var transceiver = this.transceivers[mLineIndex];
-					if (transceiver) {
-						var cand = Object.keys(candidate.candidate).length > 0 ?
-							SDPUtils.parseCandidate(candidate.candidate) : {};
-						// Ignore Chrome's invalid candidates since Edge does not like them.
-						if (cand.protocol === 'tcp' && (cand.port === 0 || cand.port === 9)) {
-							return;
-						}
-						// Ignore RTCP candidates, we assume RTCP-MUX.
-						if (cand.component !== '1') {
-							return;
-						}
-						// A dirty hack to make samples work.
-						if (cand.type === 'endOfCandidates') {
-							cand = {};
-						}
-						transceiver.iceTransport.addRemoteCandidate(cand);
-
-						// update the remoteDescription.
-						var sections = SDPUtils.splitSections(this.remoteDescription.sdp);
-						sections[mLineIndex + 1] += (cand.type ? candidate.candidate.trim()
-								: 'a=end-of-candidates') + '\r\n';
-						this.remoteDescription.sdp = sections.join('');
-					}
-				}
-				if (arguments.length > 1 && typeof arguments[1] === 'function') {
-					window.setTimeout(arguments[1], 0);
-				}
-				return Promise.resolve();
-			};
-
-			window.RTCPeerConnection.prototype.getStats = function() {
-				var promises = [];
-				this.transceivers.forEach(function(transceiver) {
-					['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
-						'dtlsTransport'].forEach(function(method) {
-						if (transceiver[method]) {
-							promises.push(transceiver[method].getStats());
-						}
-					});
-				});
-				var cb = arguments.length > 1 && typeof arguments[1] === 'function' &&
-					arguments[1];
-				return new Promise(function(resolve) {
-					// shim getStats with maplike support
-					var results = new Map();
-					Promise.all(promises).then(function(res) {
-						res.forEach(function(result) {
-							Object.keys(result).forEach(function(id) {
-								results.set(id, result[id]);
-								results[id] = result[id];
-							});
-						});
-						if (cb) {
-							window.setTimeout(cb, 0, results);
-						}
-						resolve(results);
-					});
-				});
-			};
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimPeerConnection: edgeShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia')
-	};
-
-},{"../utils":98,"./getusermedia":94,"sdp":62}],94:[function(require,module,exports){
-	arguments[4][34][0].apply(exports,arguments)
-},{"dup":34}],95:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var browserDetails = require('../utils').browserDetails;
-
-	var firefoxShim = {
-		shimOnTrack: function() {
-			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
-				window.RTCPeerConnection.prototype)) {
-				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
-					get: function() {
-						return this._ontrack;
-					},
-					set: function(f) {
-						if (this._ontrack) {
-							this.removeEventListener('track', this._ontrack);
-							this.removeEventListener('addstream', this._ontrackpoly);
-						}
-						this.addEventListener('track', this._ontrack = f);
-						this.addEventListener('addstream', this._ontrackpoly = function(e) {
-							e.stream.getTracks().forEach(function(track) {
-								var event = new Event('track');
-								event.track = track;
-								event.receiver = {track: track};
-								event.streams = [e.stream];
-								this.dispatchEvent(event);
-							}.bind(this));
-						}.bind(this));
-					}
-				});
-			}
-		},
-
-		shimSourceObject: function() {
-			// Firefox has supported mozSrcObject since FF22, unprefixed in 42.
-			if (typeof window === 'object') {
-				if (window.HTMLMediaElement &&
-					!('srcObject' in window.HTMLMediaElement.prototype)) {
-					// Shim the srcObject property, once, when HTMLMediaElement is found.
-					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
-						get: function() {
-							return this.mozSrcObject;
-						},
-						set: function(stream) {
-							this.mozSrcObject = stream;
-						}
-					});
-				}
-			}
-		},
-
-		shimPeerConnection: function() {
-			if (typeof window !== 'object' || !(window.RTCPeerConnection ||
-				window.mozRTCPeerConnection)) {
-				return; // probably media.peerconnection.enabled=false in about:config
-			}
-			// The RTCPeerConnection object.
-			if (!window.RTCPeerConnection) {
-				window.RTCPeerConnection = function(pcConfig, pcConstraints) {
-					if (browserDetails.version < 38) {
-						// .urls is not supported in FF < 38.
-						// create RTCIceServers with a single url.
-						if (pcConfig && pcConfig.iceServers) {
-							var newIceServers = [];
-							for (var i = 0; i < pcConfig.iceServers.length; i++) {
-								var server = pcConfig.iceServers[i];
-								if (server.hasOwnProperty('urls')) {
-									for (var j = 0; j < server.urls.length; j++) {
-										var newServer = {
-											url: server.urls[j]
-										};
-										if (server.urls[j].indexOf('turn') === 0) {
-											newServer.username = server.username;
-											newServer.credential = server.credential;
-										}
-										newIceServers.push(newServer);
-									}
-								} else {
-									newIceServers.push(pcConfig.iceServers[i]);
-								}
-							}
-							pcConfig.iceServers = newIceServers;
-						}
-					}
-					return new mozRTCPeerConnection(pcConfig, pcConstraints);
-				};
-				window.RTCPeerConnection.prototype = mozRTCPeerConnection.prototype;
-
-				// wrap static methods. Currently just generateCertificate.
-				if (mozRTCPeerConnection.generateCertificate) {
-					Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
-						get: function() {
-							return mozRTCPeerConnection.generateCertificate;
-						}
-					});
-				}
-
-				window.RTCSessionDescription = mozRTCSessionDescription;
-				window.RTCIceCandidate = mozRTCIceCandidate;
-			}
-
-			// shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
-			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
-				.forEach(function(method) {
-					var nativeMethod = RTCPeerConnection.prototype[method];
-					RTCPeerConnection.prototype[method] = function() {
-						arguments[0] = new ((method === 'addIceCandidate') ?
-							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
-						return nativeMethod.apply(this, arguments);
-					};
-				});
-
-			// support for addIceCandidate(null or undefined)
-			var nativeAddIceCandidate =
-				RTCPeerConnection.prototype.addIceCandidate;
-			RTCPeerConnection.prototype.addIceCandidate = function() {
-				if (!arguments[0]) {
-					if (arguments[1]) {
-						arguments[1].apply(null);
-					}
-					return Promise.resolve();
-				}
-				return nativeAddIceCandidate.apply(this, arguments);
-			};
-
-			if (browserDetails.version < 48) {
-				// shim getStats with maplike support
-				var makeMapStats = function(stats) {
-					var map = new Map();
-					Object.keys(stats).forEach(function(key) {
-						map.set(key, stats[key]);
-						map[key] = stats[key];
-					});
-					return map;
-				};
-
-				var nativeGetStats = RTCPeerConnection.prototype.getStats;
-				RTCPeerConnection.prototype.getStats = function(selector, onSucc, onErr) {
-					return nativeGetStats.apply(this, [selector || null])
-						.then(function(stats) {
-							return makeMapStats(stats);
-						})
-						.then(onSucc, onErr);
-				};
-			}
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimOnTrack: firefoxShim.shimOnTrack,
-		shimSourceObject: firefoxShim.shimSourceObject,
-		shimPeerConnection: firefoxShim.shimPeerConnection,
-		shimGetUserMedia: require('./getusermedia')
-	};
-
-},{"../utils":98,"./getusermedia":96}],96:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var logging = require('../utils').log;
-	var browserDetails = require('../utils').browserDetails;
-
-// Expose public methods.
-	module.exports = function() {
-		var shimError_ = function(e) {
-			return {
-				name: {
-					SecurityError: 'NotAllowedError',
-					PermissionDeniedError: 'NotAllowedError'
-				}[e.name] || e.name,
-				message: {
-					'The operation is insecure.': 'The request is not allowed by the ' +
-					'user agent or the platform in the current context.'
-				}[e.message] || e.message,
-				constraint: e.constraint,
-				toString: function() {
-					return this.name + (this.message && ': ') + this.message;
-				}
-			};
-		};
-
-		// getUserMedia constraints shim.
-		var getUserMedia_ = function(constraints, onSuccess, onError) {
-			var constraintsToFF37_ = function(c) {
-				if (typeof c !== 'object' || c.require) {
-					return c;
-				}
-				var require = [];
-				Object.keys(c).forEach(function(key) {
-					if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
-						return;
-					}
-					var r = c[key] = (typeof c[key] === 'object') ?
-						c[key] : {ideal: c[key]};
-					if (r.min !== undefined ||
-						r.max !== undefined || r.exact !== undefined) {
-						require.push(key);
-					}
-					if (r.exact !== undefined) {
-						if (typeof r.exact === 'number') {
-							r. min = r.max = r.exact;
-						} else {
-							c[key] = r.exact;
-						}
-						delete r.exact;
-					}
-					if (r.ideal !== undefined) {
-						c.advanced = c.advanced || [];
-						var oc = {};
-						if (typeof r.ideal === 'number') {
-							oc[key] = {min: r.ideal, max: r.ideal};
-						} else {
-							oc[key] = r.ideal;
-						}
-						c.advanced.push(oc);
-						delete r.ideal;
-						if (!Object.keys(r).length) {
-							delete c[key];
-						}
-					}
-				});
-				if (require.length) {
-					c.require = require;
-				}
-				return c;
-			};
-			constraints = JSON.parse(JSON.stringify(constraints));
-			if (browserDetails.version < 38) {
-				logging('spec: ' + JSON.stringify(constraints));
-				if (constraints.audio) {
-					constraints.audio = constraintsToFF37_(constraints.audio);
-				}
-				if (constraints.video) {
-					constraints.video = constraintsToFF37_(constraints.video);
-				}
-				logging('ff37: ' + JSON.stringify(constraints));
-			}
-			return navigator.mozGetUserMedia(constraints, onSuccess, function(e) {
-				onError(shimError_(e));
-			});
-		};
-
-		// Returns the result of getUserMedia as a Promise.
-		var getUserMediaPromise_ = function(constraints) {
-			return new Promise(function(resolve, reject) {
-				getUserMedia_(constraints, resolve, reject);
-			});
-		};
-
-		// Shim for mediaDevices on older versions.
-		if (!navigator.mediaDevices) {
-			navigator.mediaDevices = {getUserMedia: getUserMediaPromise_,
-				addEventListener: function() { },
-				removeEventListener: function() { }
-			};
-		}
-		navigator.mediaDevices.enumerateDevices =
-			navigator.mediaDevices.enumerateDevices || function() {
-				return new Promise(function(resolve) {
-					var infos = [
-						{kind: 'audioinput', deviceId: 'default', label: '', groupId: ''},
-						{kind: 'videoinput', deviceId: 'default', label: '', groupId: ''}
-					];
-					resolve(infos);
-				});
-			};
-
-		if (browserDetails.version < 41) {
-			// Work around http://bugzil.la/1169665
-			var orgEnumerateDevices =
-				navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
-			navigator.mediaDevices.enumerateDevices = function() {
-				return orgEnumerateDevices().then(undefined, function(e) {
-					if (e.name === 'NotFoundError') {
-						return [];
-					}
-					throw e;
-				});
-			};
-		}
-		if (browserDetails.version < 49) {
-			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
-			bind(navigator.mediaDevices);
-			navigator.mediaDevices.getUserMedia = function(c) {
-				return origGetUserMedia(c).then(function(stream) {
-					// Work around https://bugzil.la/802326
-					if (c.audio && !stream.getAudioTracks().length ||
-						c.video && !stream.getVideoTracks().length) {
-						stream.getTracks().forEach(function(track) {
-							track.stop();
-						});
-						throw new DOMException('The object can not be found here.',
-							'NotFoundError');
-					}
-					return stream;
-				}, function(e) {
-					return Promise.reject(shimError_(e));
-				});
-			};
-		}
-		navigator.getUserMedia = function(constraints, onSuccess, onError) {
-			if (browserDetails.version < 44) {
-				return getUserMedia_(constraints, onSuccess, onError);
-			}
-			// Replace Firefox 44+'s deprecation warning with unprefixed version.
-			console.warn('navigator.getUserMedia has been replaced by ' +
-				'navigator.mediaDevices.getUserMedia');
-			navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
-		};
-	};
-
-},{"../utils":98}],97:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	'use strict';
-	var safariShim = {
-		// TODO: DrAlex, should be here, double check against LayoutTests
-		// shimOnTrack: function() { },
-
-		// TODO: once the back-end for the mac port is done, add.
-		// TODO: check for webkitGTK+
-		// shimPeerConnection: function() { },
-
-		shimGetUserMedia: function() {
-			navigator.getUserMedia = navigator.webkitGetUserMedia;
-		}
-	};
-
-// Expose public methods.
-	module.exports = {
-		shimGetUserMedia: safariShim.shimGetUserMedia
-		// TODO
-		// shimOnTrack: safariShim.shimOnTrack,
-		// shimPeerConnection: safariShim.shimPeerConnection
-	};
-
-},{}],98:[function(require,module,exports){
-	/*
-	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
-	 *
-	 *  Use of this source code is governed by a BSD-style license
-	 *  that can be found in the LICENSE file in the root of the source
-	 *  tree.
-	 */
-	/* eslint-env node */
-	'use strict';
-
-	var logDisabled_ = true;
-
-// Utility methods.
-	var utils = {
-		disableLog: function(bool) {
-			if (typeof bool !== 'boolean') {
-				return new Error('Argument type: ' + typeof bool +
-					'. Please use a boolean.');
-			}
-			logDisabled_ = bool;
-			return (bool) ? 'adapter.js logging disabled' :
-				'adapter.js logging enabled';
-		},
-
-		log: function() {
-			if (typeof window === 'object') {
-				if (logDisabled_) {
-					return;
-				}
-				if (typeof console !== 'undefined' && typeof console.log === 'function') {
-					console.log.apply(console, arguments);
-				}
-			}
-		},
-
-		/**
-		 * Extract browser version out of the provided user agent string.
-		 *
-		 * @param {!string} uastring userAgent string.
-		 * @param {!string} expr Regular expression used as match criteria.
-		 * @param {!number} pos position in the version string to be returned.
-		 * @return {!number} browser version.
-		 */
-		extractVersion: function(uastring, expr, pos) {
-			var match = uastring.match(expr);
-			return match && match.length >= pos && parseInt(match[pos], 10);
-		},
-
-		/**
-		 * Browser detector.
-		 *
-		 * @return {object} result containing browser and version
-		 *     properties.
-		 */
-		detectBrowser: function() {
-			// Returned result object.
-			var result = {};
-			result.browser = null;
-			result.version = null;
-
-			// Fail early if it's not a browser
-			if (typeof window === 'undefined' || !window.navigator) {
-				result.browser = 'Not a browser.';
-				return result;
-			}
-
-			// Firefox.
-			if (navigator.mozGetUserMedia) {
-				result.browser = 'firefox';
-				result.version = this.extractVersion(navigator.userAgent,
-					/Firefox\/([0-9]+)\./, 1);
-
-				// all webkit-based browsers
-			} else if (navigator.webkitGetUserMedia) {
-				// Chrome, Chromium, Webview, Opera, all use the chrome shim for now
-				if (window.webkitRTCPeerConnection) {
-					result.browser = 'chrome';
-					result.version = this.extractVersion(navigator.userAgent,
-						/Chrom(e|ium)\/([0-9]+)\./, 2);
-
-					// Safari or unknown webkit-based
-					// for the time being Safari has support for MediaStreams but not webRTC
-				} else {
-					// Safari UA substrings of interest for reference:
-					// - webkit version:           AppleWebKit/602.1.25 (also used in Op,Cr)
-					// - safari UI version:        Version/9.0.3 (unique to Safari)
-					// - safari UI webkit version: Safari/601.4.4 (also used in Op,Cr)
-					//
-					// if the webkit version and safari UI webkit versions are equals,
-					// ... this is a stable version.
-					//
-					// only the internal webkit version is important today to know if
-					// media streams are supported
-					//
-					if (navigator.userAgent.match(/Version\/(\d+).(\d+)/)) {
-						result.browser = 'safari';
-						result.version = this.extractVersion(navigator.userAgent,
-							/AppleWebKit\/([0-9]+)\./, 1);
-
-						// unknown webkit-based browser
-					} else {
-						result.browser = 'Unsupported webkit-based browser ' +
-							'with GUM support but no WebRTC support.';
-						return result;
-					}
-				}
-
-				// Edge.
-			} else if (navigator.mediaDevices &&
-				navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
-				result.browser = 'edge';
-				result.version = this.extractVersion(navigator.userAgent,
-					/Edge\/(\d+).(\d+)$/, 2);
-
-				// Default fallthrough: not supported.
-			} else {
-				result.browser = 'Not a supported browser.';
-				return result;
-			}
-
-			return result;
-		}
-	};
-
-// Export.
-	module.exports = {
-		log: utils.log,
-		disableLog: utils.disableLog,
-		browserDetails: utils.detectBrowser(),
-		extractVersion: utils.extractVersion
-	};
-
-},{}],99:[function(require,module,exports){
-// created by @HenrikJoreteg
-	var prefix;
-	var version;
-
-	if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
-		prefix = 'moz';
-		version = navigator.userAgent.match(/Firefox/) && parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
-	} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
-		prefix = 'webkit';
-		version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
-	}
-
-	var PC = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
-	var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
-	var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
-	var MediaStream = window.webkitMediaStream || window.MediaStream;
-	var screenSharing = window.location.protocol === 'https:' &&
-		((prefix === 'webkit' && version >= 26) ||
-		(prefix === 'moz' && version >= 33))
-	var AudioContext = window.AudioContext || window.webkitAudioContext;
-	var videoEl = document.createElement('video');
-	var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
-	var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;
-
-// export support flags and constructors.prototype && PC
-	module.exports = {
-		prefix: prefix,
-		browserVersion: version,
-		support: !!PC && !!getUserMedia,
-		// new support style
-		supportRTCPeerConnection: !!PC,
-		supportVp8: supportVp8,
-		supportGetUserMedia: !!getUserMedia,
-		supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
-		supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
-		supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
-		supportScreenSharing: screenSharing,
-		// constructors
-		AudioContext: AudioContext,
-		PeerConnection: PC,
-		SessionDescription: SessionDescription,
-		IceCandidate: IceCandidate,
-		MediaStream: MediaStream,
-		getUserMedia: getUserMedia
-	};
-
-},{}],100:[function(require,module,exports){
-	/*
-	 WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based
-	 on @visionmedia's Emitter from UI Kit.
-
-	 Why? I wanted it standalone.
-
-	 I also wanted support for wildcard emitters like this:
-
-	 emitter.on('*', function (eventName, other, event, payloads) {
-
-	 });
-
-	 emitter.on('somenamespace*', function (eventName, payloads) {
-
-	 });
-
-	 Please note that callbacks triggered by wildcard registered events also get
-	 the event name as the first argument.
-	 */
-
-	module.exports = WildEmitter;
-
-	function WildEmitter() { }
-
-	WildEmitter.mixin = function (constructor) {
-		var prototype = constructor.prototype || constructor;
-
-		prototype.isWildEmitter= true;
-
-		// Listen on the given `event` with `fn`. Store a group name if present.
-		prototype.on = function (event, groupName, fn) {
-			this.callbacks = this.callbacks || {};
-			var hasGroup = (arguments.length === 3),
-				group = hasGroup ? arguments[1] : undefined,
-				func = hasGroup ? arguments[2] : arguments[1];
-			func._groupName = group;
-			(this.callbacks[event] = this.callbacks[event] || []).push(func);
-			return this;
-		};
-
-		// Adds an `event` listener that will be invoked a single
-		// time then automatically removed.
-		prototype.once = function (event, groupName, fn) {
-			var self = this,
-				hasGroup = (arguments.length === 3),
-				group = hasGroup ? arguments[1] : undefined,
-				func = hasGroup ? arguments[2] : arguments[1];
-			function on() {
-				self.off(event, on);
-				func.apply(this, arguments);
-			}
-			this.on(event, group, on);
-			return this;
-		};
-
-		// Unbinds an entire group
-		prototype.releaseGroup = function (groupName) {
-			this.callbacks = this.callbacks || {};
-			var item, i, len, handlers;
-			for (item in this.callbacks) {
-				handlers = this.callbacks[item];
-				for (i = 0, len = handlers.length; i < len; i++) {
-					if (handlers[i]._groupName === groupName) {
-						//console.log('removing');
-						// remove it and shorten the array we're looping through
-						handlers.splice(i, 1);
-						i--;
-						len--;
-					}
-				}
-			}
-			return this;
-		};
-
-		// Remove the given callback for `event` or all
-		// registered callbacks.
-		prototype.off = function (event, fn) {
-			this.callbacks = this.callbacks || {};
-			var callbacks = this.callbacks[event],
-				i;
-
-			if (!callbacks) return this;
-
-			// remove all handlers
-			if (arguments.length === 1) {
-				delete this.callbacks[event];
-				return this;
-			}
-
-			// remove specific handler
-			i = callbacks.indexOf(fn);
-			callbacks.splice(i, 1);
-			if (callbacks.length === 0) {
-				delete this.callbacks[event];
-			}
-			return this;
-		};
-
-		/// Emit `event` with the given args.
-		// also calls any `*` handlers
-		prototype.emit = function (event) {
-			this.callbacks = this.callbacks || {};
-			var args = [].slice.call(arguments, 1),
-				callbacks = this.callbacks[event],
-				specialCallbacks = this.getWildcardCallbacks(event),
-				i,
-				len,
-				item,
-				listeners;
-
-			if (callbacks) {
-				listeners = callbacks.slice();
-				for (i = 0, len = listeners.length; i < len; ++i) {
-					if (!listeners[i]) {
-						break;
-					}
-					listeners[i].apply(this, args);
-				}
-			}
-
-			if (specialCallbacks) {
-				len = specialCallbacks.length;
-				listeners = specialCallbacks.slice();
-				for (i = 0, len = listeners.length; i < len; ++i) {
-					if (!listeners[i]) {
-						break;
-					}
-					listeners[i].apply(this, [event].concat(args));
-				}
-			}
-
-			return this;
-		};
-
-		// Helper for for finding special wildcard event handlers that match the event
-		prototype.getWildcardCallbacks = function (eventName) {
-			this.callbacks = this.callbacks || {};
-			var item,
-				split,
-				result = [];
-
-			for (item in this.callbacks) {
-				split = item.split('*');
-				if (item === '*' || (split.length === 2 && eventName.slice(0, split[0].length) === split[0])) {
-					result = result.concat(this.callbacks[item]);
-				}
-			}
-			return result;
-		};
-
-	};
-
-	WildEmitter.mixin(WildEmitter);
-
-},{}],101:[function(require,module,exports){
-
-	/**
-	 * Module dependencies.
-	 */
-
-	var global = (function() { return this; })();
-
-	/**
-	 * WebSocket constructor.
-	 */
-
-	var WebSocket = global.WebSocket || global.MozWebSocket;
-
-	/**
-	 * Module exports.
-	 */
-
-	module.exports = WebSocket ? ws : null;
-
-	/**
-	 * WebSocket constructor.
-	 *
-	 * The third `opts` options object gets ignored in web browsers, since it's
-	 * non-standard, and throws a TypeError if passed to the constructor.
-	 * See: https://github.com/einaros/ws/issues/227
-	 *
-	 * @param {String} uri
-	 * @param {Array} protocols (optional)
-	 * @param {Object) opts (optional)
-	 * @api public
-	 */
-
-	function ws(uri, protocols, opts) {
-		var instance;
-		if (protocols) {
-			instance = new WebSocket(uri, protocols);
-		} else {
-			instance = new WebSocket(uri);
-		}
-		return instance;
-	}
-
-	if (WebSocket) ws.prototype = WebSocket.prototype;
-
-},{}],102:[function(require,module,exports){
-	var util = require('util');
-	var webrtcSupport = require('webrtcsupport');
-	var PeerConnection = require('rtcpeerconnection');
-	var WildEmitter = require('wildemitter');
-	var FileTransfer = require('filetransfer');
-
-// the inband-v1 protocol is sending metadata inband in a serialized JSON object
-// followed by the actual data. Receiver closes the datachannel upon completion
-	var INBAND_FILETRANSFER_V1 = 'https://simplewebrtc.com/protocol/filetransfer#inband-v1';
-
-	function isAllTracksEnded(stream) {
-		var isAllTracksEnded = true;
-		stream.getTracks().forEach(function (t) {
-			isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
-		});
-		return isAllTracksEnded;
-	}
-
-	function Peer(options) {
-		var self = this;
-
-		// call emitter constructor
-		WildEmitter.call(this);
-
-		this.id = options.id;
-		this.parent = options.parent;
-		this.type = options.type || 'video';
-		this.oneway = options.oneway || false;
-		this.sharemyscreen = options.sharemyscreen || false;
-		this.browserPrefix = options.prefix;
-		this.stream = options.stream;
-		this.enableDataChannels = options.enableDataChannels === undefined ? this.parent.config.enableDataChannels : options.enableDataChannels;
-		this.receiveMedia = options.receiveMedia || this.parent.config.receiveMedia;
-		this.channels = {};
-		this.pendingDCMessages = []; // key (datachannel label) -> value (array[pending messages])
-		this.sid = options.sid || Date.now().toString();
-		// Create an RTCPeerConnection via the polyfill
-		this.pc = new PeerConnection(this.parent.config.peerConnectionConfig, this.parent.config.peerConnectionConstraints);
-		this.pc.on('ice', this.onIceCandidate.bind(this));
-		this.pc.on('endOfCandidates', function (event) {
-			self.send('endOfCandidates', event);
-		});
-		this.pc.on('offer', function (offer) {
-			if (self.parent.config.nick) offer.nick = self.parent.config.nick;
-			self.send('offer', offer);
-		});
-		this.pc.on('answer', function (answer) {
-			if (self.parent.config.nick) answer.nick = self.parent.config.nick;
-			self.send('answer', answer);
-		});
-		this.pc.on('addStream', this.handleRemoteStreamAdded.bind(this));
-		this.pc.on('addChannel', this.handleDataChannelAdded.bind(this));
-		this.pc.on('removeStream', this.handleStreamRemoved.bind(this));
-		// Just fire negotiation needed events for now
-		// When browser re-negotiation handling seems to work
-		// we can use this as the trigger for starting the offer/answer process
-		// automatically. We'll just leave it be for now while this stabalizes.
-		this.pc.on('negotiationNeeded', this.emit.bind(this, 'negotiationNeeded'));
-		this.pc.on('iceConnectionStateChange', this.emit.bind(this, 'iceConnectionStateChange'));
-		this.pc.on('iceConnectionStateChange', function () {
-			switch (self.pc.iceConnectionState) {
-				case 'failed':
-					// currently, in chrome only the initiator goes to failed
-					// so we need to signal this to the peer
-					if (self.pc.pc.peerconnection.localDescription.type === 'offer') {
-						self.parent.emit('iceFailed', self);
-						self.send('connectivityError');
-					}
-					break;
-			}
-		});
-		this.pc.on('signalingStateChange', this.emit.bind(this, 'signalingStateChange'));
-		this.logger = this.parent.logger;
-
-		// handle screensharing/broadcast mode
-		if (options.type === 'screen') {
-			if (this.parent.localScreen && this.sharemyscreen) {
-				this.logger.log('adding local screen stream to peer connection');
-				this.pc.addStream(this.parent.localScreen);
-				this.broadcaster = options.broadcaster;
-			}
-		} else {
-			this.parent.localStreams.forEach(function (stream) {
-				self.pc.addStream(stream);
-			});
-		}
-
-		this.on('channelOpen', function (channel) {
-			if (channel.protocol === INBAND_FILETRANSFER_V1) {
-				channel.onmessage = function (event) {
-					var metadata = JSON.parse(event.data);
-					var receiver = new FileTransfer.Receiver();
-					receiver.receive(metadata, channel);
-					self.emit('fileTransfer', metadata, receiver);
-					receiver.on('receivedFile', function (file, metadata) {
-						receiver.channel.close();
-					});
-				};
-			}
-		});
-
-		// proxy events to parent
-		this.on('*', function () {
-			self.parent.emit.apply(self.parent, arguments);
-		});
-	}
-
-	util.inherits(Peer, WildEmitter);
-
-	Peer.prototype.handleMessage = function (message) {
-		var self = this;
-
-		this.logger.log('getting', message.type, message);
-
-		if (message.prefix) this.browserPrefix = message.prefix;
-
-		if (message.type === 'offer') {
-			if (!this.nick) this.nick = message.payload.nick;
-			delete message.payload.nick;
-			this.pc.handleOffer(message.payload, function (err) {
-				if (err) {
-					return;
-				}
-				// auto-accept
-				self.pc.answer(function (err, sessionDescription) {
-					//self.send('answer', sessionDescription);
-				});
-			});
-		} else if (message.type === 'answer') {
-			if (!this.nick) this.nick = message.payload.nick;
-			delete message.payload.nick;
-			this.pc.handleAnswer(message.payload);
-		} else if (message.type === 'candidate') {
-			this.pc.processIce(message.payload);
-		} else if (message.type === 'connectivityError') {
-			this.parent.emit('connectivityError', self);
-		} else if (message.type === 'mute') {
-			this.parent.emit('mute', {id: message.from, name: message.payload.name});
-		} else if (message.type === 'unmute') {
-			this.parent.emit('unmute', {id: message.from, name: message.payload.name});
-		} else if (message.type === 'endOfCandidates') {
-			// Edge requires an end-of-candidates. Since only Edge will have mLines or tracks on the
-			// shim this will only be called in Edge.
-			var mLines = this.pc.pc.peerconnection.transceivers || [];
-			mLines.forEach(function (mLine) {
-				if (mLine.iceTransport) {
-					mLine.iceTransport.addRemoteCandidate({});
-				}
-			});
-		} else if (message.type === 'unshareScreen') {
-			this.parent.emit('unshareScreen', {id: message.from});
-			this.end();
-		}
-	};
-
-// send via signaling channel
-	Peer.prototype.send = function (messageType, payload) {
-		var message = {
-			to: this.id,
-			sid: this.sid,
-			broadcaster: this.broadcaster,
-			roomType: this.type,
-			type: messageType,
-			payload: payload,
-			prefix: webrtcSupport.prefix
-		};
-		this.logger.log('sending', messageType, message);
-		this.parent.emit('message', message);
-	};
-
-// send via data channel
-// returns true when message was sent and false if channel is not open
-	Peer.prototype.sendDirectly = function (channel, messageType, payload) {
-		var message = {
-			type: messageType,
-			payload: payload
-		};
-		this.logger.log('sending via datachannel', channel, messageType, message);
-		var dc = this.getDataChannel(channel);
-		if (dc.readyState != 'open') {
-			if (!this.pendingDCMessages.hasOwnProperty(channel)) {
-				this.pendingDCMessages[channel] = [];
-			}
-			this.pendingDCMessages[channel].push(message);
-			return false;
-		}
-		dc.send(JSON.stringify(message));
-		return true;
-	};
-
-// Internal method registering handlers for a data channel and emitting events on the peer
-	Peer.prototype._observeDataChannel = function (channel) {
-		var self = this;
-		channel.onclose = this.emit.bind(this, 'channelClose', channel);
-		channel.onerror = this.emit.bind(this, 'channelError', channel);
-		channel.onmessage = function (event) {
-			self.emit('channelMessage', self, channel.label, JSON.parse(event.data), channel, event);
-		};
-		channel.onopen = function () {
-			self.emit('channelOpen', channel);
-			// Check if there are messages that could not be send
-			if (self.pendingDCMessages.hasOwnProperty(channel.label)) {
-				var pendingMessages = self.pendingDCMessages[channel.label];
-				for (var i = 0; i < pendingMessages.length; i++) {
-					self.sendDirectly(channel.label, pendingMessages[i].type, pendingMessages[i].payload);
-				}
-				self.pendingDCMessages[channel.label] = [];
-			}
-		};
-	};
-
-// Fetch or create a data channel by the given name
-	Peer.prototype.getDataChannel = function (name, opts) {
-		if (!webrtcSupport.supportDataChannel) return this.emit('error', new Error('createDataChannel not supported'));
-		var channel = this.channels[name];
-		opts || (opts = {});
-		if (channel) return channel;
-		// if we don't have one by this label, create it
-		channel = this.channels[name] = this.pc.createDataChannel(name, opts);
-		this._observeDataChannel(channel);
-		return channel;
-	};
-
-	Peer.prototype.onIceCandidate = function (candidate) {
-		if (this.closed) return;
-		if (candidate) {
-			var pcConfig = this.parent.config.peerConnectionConfig;
-			if (webrtcSupport.prefix === 'moz' && pcConfig && pcConfig.iceTransports &&
-				candidate.candidate && candidate.candidate.candidate &&
-				candidate.candidate.candidate.indexOf(pcConfig.iceTransports) < 0) {
-				this.logger.log('Ignoring ice candidate not matching pcConfig iceTransports type: ', pcConfig.iceTransports);
-			} else {
-				this.send('candidate', candidate);
-			}
-		} else {
-			this.logger.log("End of candidates.");
-		}
-	};
-
-	Peer.prototype.start = function () {
-		var self = this;
-
-		// well, the webrtc api requires that we either
-		// a) create a datachannel a priori
-		// b) do a renegotiation later to add the SCTP m-line
-		// Let's do (a) first...
-		if (this.enableDataChannels) {
-			this.getDataChannel('simplewebrtc');
-		}
-
-		this.pc.offer(this.receiveMedia, function (err, sessionDescription) {
-			//self.send('offer', sessionDescription);
-		});
-	};
-
-	Peer.prototype.icerestart = function () {
-		var constraints = this.receiveMedia;
-		constraints.iceRestart = true;
-		this.pc.offer(constraints, function (err, success) { });
-	};
-
-	Peer.prototype.end = function () {
-		if (this.closed) return;
-		this.pc.close();
-		this.handleStreamRemoved();
-	};
-
-	Peer.prototype.handleRemoteStreamAdded = function (event) {
-		var self = this;
-		if (this.stream) {
-			this.logger.warn('Already have a remote stream');
-		} else {
-			this.stream = event.stream;
-
-			this.stream.getTracks().forEach(function (track) {
-				track.addEventListener('ended', function () {
-					if (isAllTracksEnded(self.stream)) {
-						self.end();
-					}
-				});
-			});
-
-			this.parent.emit('peerStreamAdded', this);
-		}
-	};
-
-	Peer.prototype.handleStreamRemoved = function () {
-		var peerIndex = this.parent.peers.indexOf(this);
-		if (peerIndex > -1) {
-			this.parent.peers.splice(peerIndex, 1);
-			this.closed = true;
-			this.parent.emit('peerStreamRemoved', this);
-		}
-	};
-
-	Peer.prototype.handleDataChannelAdded = function (channel) {
-		this.channels[channel.label] = channel;
-		this._observeDataChannel(channel);
-	};
-
-	Peer.prototype.sendFile = function (file) {
-		var sender = new FileTransfer.Sender();
-		var dc = this.getDataChannel('filetransfer' + (new Date()).getTime(), {
-			protocol: INBAND_FILETRANSFER_V1
-		});
-		// override onopen
-		dc.onopen = function () {
-			dc.send(JSON.stringify({
-				size: file.size,
-				name: file.name
-			}));
-			sender.send(file, dc);
-		};
-		// override onclose
-		dc.onclose = function () {
-			console.log('sender received transfer');
-			sender.emit('complete');
-		};
-		return sender;
-	};
-
-	module.exports = Peer;
-
-},{"filetransfer":26,"rtcpeerconnection":56,"util":89,"webrtcsupport":99,"wildemitter":100}],103:[function(require,module,exports){
-	var WebRTC = require('./webrtc');
-	var WildEmitter = require('wildemitter');
-	var webrtcSupport = require('webrtcsupport');
-	var attachMediaStream = require('attachmediastream');
-	var mockconsole = require('mockconsole');
-	var SocketIoConnection = require('./socketioconnection');
-
-	function SimpleWebRTC(opts) {
-		var self = this;
-		var options = opts || {};
-		var config = this.config = {
-			url: 'https://sandbox.simplewebrtc.com:443/',
-			socketio: {/* 'force new connection':true*/},
-			connection: null,
-			debug: false,
-			localVideoEl: '',
-			remoteVideosEl: '',
-			enableDataChannels: true,
-			autoRequestMedia: false,
-			autoRemoveVideos: true,
-			adjustPeerVolume: false,
-			peerVolumeWhenSpeaking: 0.25,
-			media: {
-				video: true,
-				audio: true
-			},
-			receiveMedia: {
-				offerToReceiveAudio: 1,
-				offerToReceiveVideo: 1
-			},
-			localVideo: {
-				autoplay: true,
-				mirror: true,
-				muted: true
-			}
-		};
-		var item, connection;
-
-		// We also allow a 'logger' option. It can be any object that implements
-		// log, warn, and error methods.
-		// We log nothing by default, following "the rule of silence":
-		// http://www.linfo.org/rule_of_silence.html
-		this.logger = function () {
-			// we assume that if you're in debug mode and you didn't
-			// pass in a logger, you actually want to log as much as
-			// possible.
-			if (opts.debug) {
-				return opts.logger || console;
-			} else {
-				// or we'll use your logger which should have its own logic
-				// for output. Or we'll return the no-op.
-				return opts.logger || mockconsole;
-			}
-		}();
-
-		// set our config from options
-		for (item in options) {
-			if (options.hasOwnProperty(item)) {
-				this.config[item] = options[item];
-			}
-		}
-
-		// attach detected support for convenience
-		this.capabilities = webrtcSupport;
-
-		// call WildEmitter constructor
-		WildEmitter.call(this);
-
-		// create default SocketIoConnection if it's not passed in
-		if (this.config.connection === null) {
-			connection = this.connection = new SocketIoConnection(this.config);
-		} else {
-			connection = this.connection = this.config.connection;
-		}
-
-		connection.on('connect', function () {
-			console.warn('CONNECTED');
-			self.emit('connectionReady', connection.getSessionid());
-			self.sessionReady = true;
-			self.testReadiness();
-		});
-
-		connection.on('message', function (message) {
-			var peers = self.webrtc.getPeers(message.from, message.roomType);
-			var peer;
-
-			if (message.type === 'offer') {
-				if (peers.length) {
-					peers.forEach(function (p) {
-						if (p.sid == message.sid) peer = p;
-					});
-					//if (!peer) peer = peers[0]; // fallback for old protocol versions
-				}
-				if (!peer) {
-					peer = self.webrtc.createPeer({
-						id: message.from,
-						sid: message.sid,
-						type: message.roomType,
-						enableDataChannels: self.config.enableDataChannels && message.roomType !== 'screen',
-						sharemyscreen: message.roomType === 'screen' && !message.broadcaster,
-						broadcaster: message.roomType === 'screen' && !message.broadcaster ? self.connection.getSessionid() : null
-					});
-					self.emit('createdPeer', peer);
-				}
-				peer.handleMessage(message);
-			} else if (peers.length) {
-				peers.forEach(function (peer) {
-					if (message.sid) {
-						if (peer.sid === message.sid) {
-							peer.handleMessage(message);
-						}
-					} else {
-						peer.handleMessage(message);
-					}
-				});
-			}
-		});
-
-		connection.on('remove', function (room) {
-			if (room.id !== self.connection.getSessionid()) {
-				self.webrtc.removePeers(room.id, room.type);
-			}
-		});
-
-		// instantiate our main WebRTC helper
-		// using same logger from logic here
-		opts.logger = this.logger;
-		opts.debug = false;
-		this.webrtc = new WebRTC(opts);
-
-		// attach a few methods from underlying lib to simple.
-		['mute', 'unmute', 'pauseVideo', 'resumeVideo', 'pause', 'resume', 'sendToAll', 'sendDirectlyToAll', 'getPeers', 'createPeer', 'removePeers'].forEach(function (method) {
-			self[method] = self.webrtc[method].bind(self.webrtc);
-		});
-
-		// proxy events from WebRTC
-		this.webrtc.on('*', function () {
-			self.emit.apply(self, arguments);
-		});
-
-		// log all events in debug mode
-		if (config.debug) {
-			this.on('*', this.logger.log.bind(this.logger, 'SimpleWebRTC event:'));
-		}
-
-		// check for readiness
-		this.webrtc.on('localStream', function () {
-			self.testReadiness();
-		});
-
-		this.webrtc.on('message', function (payload) {
-			self.connection.emit('message', payload);
-		});
-
-		this.webrtc.on('peerStreamAdded', this.handlePeerStreamAdded.bind(this));
-		this.webrtc.on('peerStreamRemoved', this.handlePeerStreamRemoved.bind(this));
-
-		// echo cancellation attempts
-		if (this.config.adjustPeerVolume) {
-			this.webrtc.on('speaking', this.setVolumeForAll.bind(this, this.config.peerVolumeWhenSpeaking));
-			this.webrtc.on('stoppedSpeaking', this.setVolumeForAll.bind(this, 1));
-		}
-
-		connection.on('stunservers', function (args) {
-			// appends to the config
-			self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
-			self.emit('stunservers', args);
-		});
-		connection.on('turnservers', function (args) {
-			// appends to the config
-			self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
-			self.emit('turnservers', args);
-		});
-
-		this.webrtc.on('iceFailed', function (peer) {
-			// TODO: local ice failure
-			console.error('iceFailed event received');
-			var pc = peer.pc;
-			console.log('had local relay candidate', pc.hadLocalRelayCandidate);
-			console.log('had remote relay candidate', pc.hadRemoteRelayCandidate);
-		});
-		this.webrtc.on('connectivityError', function (peer) {
-			// TODO: remote ice failure
-			console.error('connectivityError event received');
-			var pc = peer.pc;
-			console.log('had local relay candidate', pc.hadLocalRelayCandidate);
-			console.log('had remote relay candidate', pc.hadRemoteRelayCandidate);
-		});
-
-		// screensharing events
-		this.webrtc.on('localScreen', function (stream) {
-			var item,
-				el = document.createElement('video'),
-				container = self.getRemoteVideoContainer();
-
-			el.oncontextmenu = function () { return false; };
-			el.id = 'localScreen';
-			attachMediaStream(stream, el);
-			if (container) {
-				container.appendChild(el);
-			}
-
-			self.emit('localScreenAdded', el);
-			self.connection.emit('shareScreen');
-			// NOTE: we don't create screen peers for existing video peers here,
-			// this is done by the application code in "webrtc.js".
-		});
-		this.webrtc.on('localScreenStopped', function (stream) {
-			if (self.getLocalScreen()) {
-				self.stopScreenShare();
-			}
-			/*
-			 self.connection.emit('unshareScreen');
-			 self.webrtc.peers.forEach(function (peer) {
-			 if (peer.sharemyscreen) {
-			 peer.end();
-			 }
-			 });
-			 */
-		});
-
-		this.webrtc.on('channelMessage', function (peer, label, data) {
-			if (data.type == 'volume') {
-				self.emit('remoteVolumeChange', peer, data.volume);
-			}
-		});
-	}
-
-
-	SimpleWebRTC.prototype = Object.create(WildEmitter.prototype, {
-		constructor: {
-			value: SimpleWebRTC
-		}
-	});
-
-	SimpleWebRTC.prototype.leaveCall = function () {
-		if (this.roomName) {
-			while (this.webrtc.peers.length) {
-				this.webrtc.peers[0].end();
-			}
-			if (this.getLocalScreen()) {
-				this.stopScreenShare();
-			}
-			this.emit('leftRoom', this.roomName);
-			this.stopLocalVideo();
-			this.roomName = undefined;
-		}
-	};
-
-	SimpleWebRTC.prototype.disconnect = function () {
-		this.connection.disconnect();
-		delete this.connection;
-	};
-
-	SimpleWebRTC.prototype.handlePeerStreamAdded = function (peer) {
-		var self = this;
-		var container = this.getRemoteVideoContainer();
-		var video = attachMediaStream(peer.stream);
-
-		// store video element as part of peer for easy removal
-		peer.videoEl = video;
-		video.id = this.getDomId(peer);
-
-		if (container) container.appendChild(video);
-
-		this.emit('videoAdded', video, peer);
-
-		// send our mute status to new peer if we're muted
-		// currently called with a small delay because it arrives before
-		// the video element is created otherwise (which happens after
-		// the async setRemoteDescription-createAnswer)
-		window.setTimeout(function () {
-			if (!self.webrtc.isAudioEnabled()) {
-				peer.send('mute', {name: 'audio'});
-			}
-			if (!self.webrtc.isVideoEnabled()) {
-				peer.send('mute', {name: 'video'});
-			}
-		}, 250);
-	};
-
-	SimpleWebRTC.prototype.handlePeerStreamRemoved = function (peer) {
-		var container = this.getRemoteVideoContainer();
-		var videoEl = peer.videoEl;
-		if (this.config.autoRemoveVideos && container && videoEl) {
-			container.removeChild(videoEl);
-		}
-		if (videoEl) this.emit('videoRemoved', videoEl, peer);
-	};
-
-	SimpleWebRTC.prototype.getDomId = function (peer) {
-		return [peer.id, peer.type, peer.broadcaster ? 'broadcasting' : 'incoming'].join('_');
-	};
-
-// set volume on video tag for all peers takse a value between 0 and 1
-	SimpleWebRTC.prototype.setVolumeForAll = function (volume) {
-		this.webrtc.peers.forEach(function (peer) {
-			if (peer.videoEl) peer.videoEl.volume = volume;
-		});
-	};
-
-	SimpleWebRTC.prototype.joinCall = function (name) {
-		if (this.config.autoRequestMedia) this.startLocalVideo();
-		this.roomName = name;
-		this.emit('joinedRoom', name);
-	};
-
-	SimpleWebRTC.prototype.getEl = function (idOrEl) {
-		if (typeof idOrEl === 'string') {
-			return document.getElementById(idOrEl);
-		} else {
-			return idOrEl;
-		}
-	};
-
-	SimpleWebRTC.prototype.startLocalVideo = function () {
-		var self = this;
-		console.log('startLocalVideo');
-		this.webrtc.startLocalMedia(this.config.media, function (err, stream) {
-			if (err) {
-				self.emit('localMediaError', err);
-			} else {
-				self.emit('localMediaStarted', self.config.media);
-				attachMediaStream(stream, self.getLocalVideoContainer(), self.config.localVideo);
-			}
-		});
-	};
-
-	SimpleWebRTC.prototype.stopLocalVideo = function () {
-		this.webrtc.stopLocalMedia();
-	};
-
-// this accepts either element ID or element
-// and either the video tag itself or a container
-// that will be used to put the video tag into.
-	SimpleWebRTC.prototype.getLocalVideoContainer = function () {
-		var el = this.getEl(this.config.localVideoEl);
-		if (el && el.tagName === 'VIDEO') {
-			el.oncontextmenu = function () { return false; };
-			return el;
-		} else if (el) {
-			var video = document.createElement('video');
-			video.oncontextmenu = function () { return false; };
-			el.appendChild(video);
-			return video;
-		} else {
-			return;
-		}
-	};
-
-	SimpleWebRTC.prototype.getRemoteVideoContainer = function () {
-		return this.getEl(this.config.remoteVideosEl);
-	};
-
-	SimpleWebRTC.prototype.shareScreen = function (mode, cb) {
-		this.webrtc.startScreenShare(mode, cb);
-	};
-
-	SimpleWebRTC.prototype.getLocalScreen = function () {
-		return this.webrtc.localScreen;
-	};
-
-	SimpleWebRTC.prototype.stopScreenShare = function () {
-		this.connection.emit('unshareScreen');
-		var videoEl = document.getElementById('localScreen');
-		var container = this.getRemoteVideoContainer();
-
-		if (this.config.autoRemoveVideos && container && videoEl) {
-			container.removeChild(videoEl);
-		}
-
-		// a hack to emit the event the removes the video
-		// element that we want
-		if (videoEl) {
-			this.emit('videoRemoved', videoEl);
-		}
-		if (this.getLocalScreen()) {
-			this.webrtc.stopScreenShare();
-		}
-		// Notify peers were sending to.
-		this.webrtc.peers.forEach(function (peer) {
-			if (peer.type === 'screen' && peer.sharemyscreen) {
-				peer.send('unshareScreen');
-			}
-			if (peer.broadcaster) {
-				peer.end();
-			}
-		});
-	};
-
-	SimpleWebRTC.prototype.testReadiness = function () {
-		var self = this;
-		if (this.sessionReady) {
-			if (!this.config.media.video && !this.config.media.audio) {
-				self.emit('readyToCall', self.connection.getSessionid());
-			} else if (this.webrtc.localStreams.length > 0) {
-				self.emit('readyToCall', self.connection.getSessionid());
-			}
-		}
-	};
-
-	SimpleWebRTC.prototype.createRoom = function (name, cb) {
-		this.roomName = name;
-		if (arguments.length === 2) {
-			this.connection.emit('create', name, cb);
-		} else {
-			this.connection.emit('create', name);
-		}
-	};
-
-	SimpleWebRTC.prototype.sendFile = function () {
-		if (!webrtcSupport.dataChannel) {
-			return this.emit('error', new Error('DataChannelNotSupported'));
-		}
-
-	};
-
-	module.exports = SimpleWebRTC;
-
-},{"./socketioconnection":104,"./webrtc":105,"attachmediastream":3,"mockconsole":50,"webrtcsupport":99,"wildemitter":100}],104:[function(require,module,exports){
-	var io = require('socket.io-client');
-
-	function SocketIoConnection(config) {
-		this.connection = io.connect(config.url, config.socketio);
-	}
-
-	SocketIoConnection.prototype.on = function (ev, fn) {
-		this.connection.on(ev, fn);
-	};
-
-	SocketIoConnection.prototype.emit = function () {
-		this.connection.emit.apply(this.connection, arguments);
-	};
-
-	SocketIoConnection.prototype.getSessionid = function () {
-		return this.connection.id;
-	};
-
-	SocketIoConnection.prototype.disconnect = function () {
-		return this.connection.disconnect();
-	};
-
-	module.exports = SocketIoConnection;
-
-},{"socket.io-client":63}],105:[function(require,module,exports){
-	var util = require('util');
-	var webrtcSupport = require('webrtcsupport');
-	var mockconsole = require('mockconsole');
-	var localMedia = require('localmedia');
-	var Peer = require('./peer');
-
-
-	function WebRTC(opts) {
-		var self = this;
-		var options = opts || {};
-		var config = this.config = {
-			debug: false,
-			// makes the entire PC config overridable
-			peerConnectionConfig: {
-				iceServers: []
-			},
-			peerConnectionConstraints: {
-				optional: []
-			},
-			receiveMedia: {
-				offerToReceiveAudio: 1,
-				offerToReceiveVideo: 1
-			},
-			enableDataChannels: true
-		};
-		var item;
-
-		// We also allow a 'logger' option. It can be any object that implements
-		// log, warn, and error methods.
-		// We log nothing by default, following "the rule of silence":
-		// http://www.linfo.org/rule_of_silence.html
-		this.logger = function () {
-			// we assume that if you're in debug mode and you didn't
-			// pass in a logger, you actually want to log as much as
-			// possible.
-			if (opts.debug) {
-				return opts.logger || console;
-			} else {
-				// or we'll use your logger which should have its own logic
-				// for output. Or we'll return the no-op.
-				return opts.logger || mockconsole;
-			}
-		}();
-
-		// set options
-		for (item in options) {
-			if (options.hasOwnProperty(item)) {
-				this.config[item] = options[item];
-			}
-		}
-
-		// check for support
-		if (!webrtcSupport.support) {
-			this.logger.error('Your browser doesn\'t seem to support WebRTC');
-		}
-
-		// where we'll store our peer connections
-		this.peers = [];
-
-		// call localMedia constructor
-		localMedia.call(this, this.config);
-
-		this.on('speaking', function () {
-			if (!self.hardMuted) {
-				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
-				self.peers.forEach(function (peer) {
-					if (peer.enableDataChannels) {
-						var dc = peer.getDataChannel('hark');
-						if (dc.readyState != 'open') return;
-						dc.send(JSON.stringify({type: 'speaking'}));
-					}
-				});
-			}
-		});
-		this.on('stoppedSpeaking', function () {
-			if (!self.hardMuted) {
-				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
-				self.peers.forEach(function (peer) {
-					if (peer.enableDataChannels) {
-						var dc = peer.getDataChannel('hark');
-						if (dc.readyState != 'open') return;
-						dc.send(JSON.stringify({type: 'stoppedSpeaking'}));
-					}
-				});
-			}
-		});
-		this.on('volumeChange', function (volume, treshold) {
-			if (!self.hardMuted) {
-				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
-				self.peers.forEach(function (peer) {
-					if (peer.enableDataChannels) {
-						var dc = peer.getDataChannel('hark');
-						if (dc.readyState != 'open') return;
-						dc.send(JSON.stringify({type: 'volume', volume: volume }));
-					}
-				});
-			}
-		});
-
-		this.on('unshareScreen', function(message) {
-			// End peers we were receiving the screensharing stream from.
-			var peers = self.getPeers(message.from, 'screen');
-			peers.forEach(function(peer) {
-				if (!peer.sharemyscreen) {
-					peer.end();
-				}
-			});
-		});
-
-
-		// log events in debug mode
-		if (this.config.debug) {
-			this.on('*', function (event, val1, val2) {
-				var logger;
-				// if you didn't pass in a logger and you explicitly turning on debug
-				// we're just going to assume you're wanting log output with console
-				if (self.config.logger === mockconsole) {
-					logger = console;
-				} else {
-					logger = self.logger;
-				}
-				logger.log('event:', event, val1, val2);
-			});
-		}
-	}
-
-	util.inherits(WebRTC, localMedia);
-
-	WebRTC.prototype.createPeer = function (opts) {
-		var peer;
-		opts.parent = this;
-		peer = new Peer(opts);
-		this.peers.push(peer);
-		return peer;
-	};
-
-// removes peers
-	WebRTC.prototype.removePeers = function (id, type) {
-		this.getPeers(id, type).forEach(function (peer) {
-			console.warn('Peer ended', id);
-			peer.end();
-		});
-	};
-
-// fetches all Peer objects by session id and/or type
-	WebRTC.prototype.getPeers = function (sessionId, type) {
-		return this.peers.filter(function (peer) {
-			return (!sessionId || peer.id === sessionId) && (!type || peer.type === type);
-		});
-	};
-
-// sends message to all
-	WebRTC.prototype.sendToAll = function (message, payload) {
-		this.peers.forEach(function (peer) {
-			peer.send(message, payload);
-		});
-	};
-
-// sends message to all using a datachannel
-// only sends to anyone who has an open datachannel
-	WebRTC.prototype.sendDirectlyToAll = function (channel, message, payload) {
-		this.peers.forEach(function (peer) {
-			if (peer.enableDataChannels) {
-				peer.sendDirectly(channel, message, payload);
-			}
-		});
-	};
-
-	module.exports = WebRTC;
-
-},{"./peer":102,"localmedia":46,"mockconsole":50,"util":89,"webrtcsupport":99}]},{},[103])(103)
-});
diff --git a/js/simplewebrtc/bundled.js b/js/simplewebrtc/bundled.js
new file mode 100644
index 000000000..c14d76f18
--- /dev/null
+++ b/js/simplewebrtc/bundled.js
@@ -0,0 +1,8245 @@
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.SimpleWebRTC = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+"use strict";
+
+// getScreenMedia helper by @HenrikJoreteg
+var getUserMedia = function getUserMedia(constraints, callback) {
+  window.navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
+    callback(null, stream);
+  }).catch(function (error) {
+    callback(error, null);
+  });
+}; // cache for constraints and callback
+
+
+var cache = {};
+
+module.exports = function (mode, constraints, cb) {
+  var hasConstraints = arguments.length === 3;
+  var callback = hasConstraints ? cb : constraints;
+  var error;
+
+  if (typeof window === 'undefined' || window.location.protocol === 'http:') {
+    error = new Error('NavigatorUserMediaError');
+    error.name = 'HTTPS_REQUIRED';
+    return callback(error);
+  }
+
+  if (navigator.webkitGetUserMedia) {
+    var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(\d+)\./)[1], 10);
+    var maxver = 33; // Chrome 71 dropped support for "window.chrome.webstore;".
+
+    var isCef = chromever < 71 && !window.chrome.webstore; // "known" crash in chrome 34 and 35 on linux
+
+    if (window.navigator.userAgent.match('Linux')) maxver = 35; // check that the extension is installed by looking for a
+    // sessionStorage variable that contains the extension id
+    // this has to be set after installation unless the contest
+    // script does that
+
+    if (sessionStorage.getScreenMediaJSExtensionId) {
+      chrome.runtime.sendMessage(sessionStorage.getScreenMediaJSExtensionId, {
+        type: 'getScreen',
+        id: 1
+      }, null, function (data) {
+        if (!data || data.sourceId === '') {
+          // user canceled
+          var error = new Error('NavigatorUserMediaError');
+          error.name = 'PERMISSION_DENIED';
+          callback(error);
+        } else {
+          constraints = hasConstraints && constraints || {
+            audio: false,
+            video: {
+              mandatory: {
+                chromeMediaSource: 'desktop',
+                maxWidth: window.screen.width,
+                maxHeight: window.screen.height,
+                maxFrameRate: 3
+              }
+            }
+          };
+          constraints.video.mandatory.chromeMediaSourceId = data.sourceId;
+          getUserMedia(constraints, callback);
+        }
+      });
+    } else if (window.cefGetScreenMedia) {
+      //window.cefGetScreenMedia is experimental - may be removed without notice
+      window.cefGetScreenMedia(function (sourceId) {
+        if (!sourceId) {
+          var error = new Error('cefGetScreenMediaError');
+          error.name = 'CEF_GETSCREENMEDIA_CANCELED';
+          callback(error);
+        } else {
+          constraints = hasConstraints && constraints || {
+            audio: false,
+            video: {
+              mandatory: {
+                chromeMediaSource: 'desktop',
+                maxWidth: window.screen.width,
+                maxHeight: window.screen.height,
+                maxFrameRate: 3
+              },
+              optional: [{
+                googLeakyBucket: true
+              }, {
+                googTemporalLayeredScreencast: true
+              }]
+            }
+          };
+          constraints.video.mandatory.chromeMediaSourceId = sourceId;
+          getUserMedia(constraints, callback);
+        }
+      });
+    } else if (isCef || chromever >= 26 && chromever <= maxver) {
+      // chrome 26 - chrome 33 way to do it -- requires bad chrome://flags
+      // note: this is basically in maintenance mode and will go away soon
+      constraints = hasConstraints && constraints || {
+        video: {
+          mandatory: {
+            googLeakyBucket: true,
+            maxWidth: window.screen.width,
+            maxHeight: window.screen.height,
+            maxFrameRate: 3,
+            chromeMediaSource: 'screen'
+          }
+        }
+      };
+      getUserMedia(constraints, callback);
+    } else {
+      // chrome 34+ way requiring an extension
+      var pending = window.setTimeout(function () {
+        error = new Error('NavigatorUserMediaError');
+        error.name = 'EXTENSION_UNAVAILABLE';
+        return callback(error);
+      }, 1000);
+      cache[pending] = [callback, hasConstraints ? constraints : null];
+      window.postMessage({
+        type: 'getScreen',
+        id: pending
+      }, '*');
+    }
+  } else if (window.navigator.userAgent.match('Firefox')) {
+    var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
+
+    if (ffver >= 52) {
+      mode = mode || 'window';
+      constraints = hasConstraints && constraints || {
+        video: {
+          mozMediaSource: mode,
+          mediaSource: mode
+        }
+      };
+      getUserMedia(constraints, function (err, stream) {
+        callback(err, stream);
+
+        if (err) {
+          return;
+        } // workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
+
+
+        var lastTime = stream.currentTime;
+        var polly = window.setInterval(function () {
+          if (!stream) window.clearInterval(polly);
+
+          if (stream.currentTime == lastTime) {
+            window.clearInterval(polly);
+
+            if (stream.onended) {
+              stream.onended();
+            }
+          }
+
+          lastTime = stream.currentTime;
+        }, 500);
+      });
+    } else {
+      error = new Error('NavigatorUserMediaError');
+      error.name = 'FF52_REQUIRED';
+      return callback(error);
+    }
+  } else if (navigator.mediaDevices && navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
+    navigator.mediaDevices.getDisplayMedia({
+      video: true
+    }).then(function (stream) {
+      callback(null, stream);
+    }).catch(function (error) {
+      callback(error, null);
+    });
+  }
+};
+
+typeof window !== 'undefined' && window.addEventListener('message', function (event) {
+  if (event.origin != window.location.origin && !event.isTrusted) {
+    return;
+  }
+
+  if (event.data.type == 'gotScreen' && cache[event.data.id]) {
+    var data = cache[event.data.id];
+    var constraints = data[1];
+    var callback = data[0];
+    delete cache[event.data.id];
+
+    if (event.data.sourceId === '') {
+      // user canceled
+      var error = new Error('NavigatorUserMediaError');
+      error.name = 'PERMISSION_DENIED';
+      callback(error);
+    } else {
+      constraints = constraints || {
+        audio: false,
+        video: {
+          mandatory: {
+            chromeMediaSource: 'desktop',
+            maxWidth: window.screen.width,
+            maxHeight: window.screen.height,
+            maxFrameRate: 3
+          },
+          optional: [{
+            googLeakyBucket: true
+          }, {
+            googTemporalLayeredScreencast: true
+          }]
+        }
+      };
+      constraints.video.mandatory.chromeMediaSourceId = event.data.sourceId;
+      getUserMedia(constraints, callback);
+    }
+  } else if (event.data.type == 'getScreenPending') {
+    window.clearTimeout(event.data.id);
+  }
+});
+
+},{}],2:[function(require,module,exports){
+"use strict";
+
+var util = require('util');
+
+var hark = require('hark');
+
+var getScreenMedia = require('./getscreenmedia');
+
+var WildEmitter = require('wildemitter');
+
+var mockconsole = require('mockconsole');
+
+function isAllTracksEnded(stream) {
+  var isAllTracksEnded = true;
+  stream.getTracks().forEach(function (t) {
+    isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+  });
+  return isAllTracksEnded;
+}
+
+function LocalMedia(opts) {
+  WildEmitter.call(this);
+  var config = this.config = {
+    detectSpeakingEvents: false,
+    audioFallback: false,
+    media: {
+      audio: true,
+      video: true
+    },
+    harkOptions: null,
+    logger: mockconsole
+  };
+  var item;
+
+  for (item in opts) {
+    if (opts.hasOwnProperty(item)) {
+      this.config[item] = opts[item];
+    }
+  }
+
+  this.logger = config.logger;
+  this._log = this.logger.log.bind(this.logger, 'LocalMedia:');
+  this._logerror = this.logger.error.bind(this.logger, 'LocalMedia:');
+  this.localStreams = [];
+  this.localScreens = [];
+
+  if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
+    this._logerror('Your browser does not support local media capture.');
+  }
+
+  this._audioMonitors = [];
+  this.on('localStreamStopped', this._stopAudioMonitor.bind(this));
+  this.on('localScreenStopped', this._stopAudioMonitor.bind(this));
+}
+
+util.inherits(LocalMedia, WildEmitter);
+
+LocalMedia.prototype.start = function (mediaConstraints, cb) {
+  var self = this;
+  var constraints = mediaConstraints || this.config.media;
+  this.emit('localStreamRequested', constraints);
+  navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
+    // Although the promise should be resolved only if all the constraints
+    // are met Edge resolves it if both audio and video are requested but
+    // only audio is available.
+    if (constraints.video && stream.getVideoTracks().length === 0) {
+      constraints.video = false;
+      self.start(constraints, cb);
+      return;
+    }
+
+    if (constraints.audio && self.config.detectSpeakingEvents) {
+      self._setupAudioMonitor(stream, self.config.harkOptions);
+    }
+
+    self.localStreams.push(stream);
+    stream.getTracks().forEach(function (track) {
+      track.addEventListener('ended', function () {
+        if (isAllTracksEnded(stream)) {
+          self._removeStream(stream);
+        }
+      });
+    });
+    self.emit('localStream', stream);
+
+    if (cb) {
+      return cb(null, stream);
+    }
+  }).catch(function (err) {
+    // Fallback for users without a camera
+    if (self.config.audioFallback && err.name === 'NotFoundError' && constraints.video !== false) {
+      constraints.video = false;
+      self.start(constraints, cb);
+      return;
+    }
+
+    self.emit('localStreamRequestFailed', constraints);
+
+    if (cb) {
+      return cb(err, null);
+    }
+  });
+};
+
+LocalMedia.prototype.stop = function (stream) {
+  this.stopStream(stream);
+  this.stopScreenShare(stream);
+};
+
+LocalMedia.prototype.stopStream = function (stream) {
+  var self = this;
+
+  if (stream) {
+    var idx = this.localStreams.indexOf(stream);
+
+    if (idx > -1) {
+      stream.getTracks().forEach(function (track) {
+        track.stop();
+      });
+
+      this._removeStream(stream);
+    }
+  } else {
+    this.localStreams.forEach(function (stream) {
+      stream.getTracks().forEach(function (track) {
+        track.stop();
+      });
+
+      self._removeStream(stream);
+    });
+  }
+};
+
+LocalMedia.prototype.startScreenShare = function (mode, constraints, cb) {
+  var self = this;
+  this.emit('localScreenRequested');
+
+  if (typeof constraints === 'function' && !cb) {
+    cb = constraints;
+    constraints = null;
+  }
+
+  getScreenMedia(mode, constraints, function (err, stream) {
+    if (!err) {
+      self.localScreens.push(stream);
+      stream.getTracks().forEach(function (track) {
+        track.addEventListener('ended', function () {
+          var isAllTracksEnded = true;
+          stream.getTracks().forEach(function (t) {
+            isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+          });
+
+          if (isAllTracksEnded) {
+            self._removeStream(stream);
+          }
+        });
+      });
+      self.emit('localScreen', stream);
+    } else {
+      self.emit('localScreenRequestFailed');
+    } // enable the callback
+
+
+    if (cb) {
+      return cb(err, stream);
+    }
+  });
+};
+
+LocalMedia.prototype.stopScreenShare = function (stream) {
+  var self = this;
+
+  if (stream) {
+    var idx = this.localScreens.indexOf(stream);
+
+    if (idx > -1) {
+      stream.getTracks().forEach(function (track) {
+        track.stop();
+      });
+
+      this._removeStream(stream);
+    }
+  } else {
+    this.localScreens.forEach(function (stream) {
+      stream.getTracks().forEach(function (track) {
+        track.stop();
+      });
+
+      self._removeStream(stream);
+    });
+  }
+}; // Audio controls
+
+
+LocalMedia.prototype.mute = function () {
+  this._audioEnabled(false);
+
+  this.emit('audioOff');
+};
+
+LocalMedia.prototype.unmute = function () {
+  this._audioEnabled(true);
+
+  this.emit('audioOn');
+}; // Video controls
+
+
+LocalMedia.prototype.pauseVideo = function () {
+  this._videoEnabled(false);
+
+  this.emit('videoOff');
+};
+
+LocalMedia.prototype.resumeVideo = function () {
+  this._videoEnabled(true);
+
+  this.emit('videoOn');
+}; // Combined controls
+
+
+LocalMedia.prototype.pause = function () {
+  this.mute();
+  this.pauseVideo();
+};
+
+LocalMedia.prototype.resume = function () {
+  this.unmute();
+  this.resumeVideo();
+}; // Internal methods for enabling/disabling audio/video
+
+
+LocalMedia.prototype._audioEnabled = function (bool) {
+  this.localStreams.forEach(function (stream) {
+    stream.getAudioTracks().forEach(function (track) {
+      track.enabled = !!bool;
+    });
+  });
+};
+
+LocalMedia.prototype._videoEnabled = function (bool) {
+  this.localStreams.forEach(function (stream) {
+    stream.getVideoTracks().forEach(function (track) {
+      track.enabled = !!bool;
+    });
+  });
+}; // check if all audio streams are enabled
+
+
+LocalMedia.prototype.isAudioEnabled = function () {
+  var enabled = true;
+  var hasAudioTracks = false;
+  this.localStreams.forEach(function (stream) {
+    var audioTracks = stream.getAudioTracks();
+
+    if (audioTracks.length > 0) {
+      hasAudioTracks = true;
+      audioTracks.forEach(function (track) {
+        enabled = enabled && track.enabled;
+      });
+    }
+  }); // If no audioTracks were found, that means there is no microphone device.
+  // In that case, isAudioEnabled should return false.
+
+  if (!hasAudioTracks) {
+    return false;
+  }
+
+  return enabled;
+}; // check if all video streams are enabled
+
+
+LocalMedia.prototype.isVideoEnabled = function () {
+  var enabled = true;
+  var hasVideoTracks = false;
+  this.localStreams.forEach(function (stream) {
+    var videoTracks = stream.getVideoTracks();
+
+    if (videoTracks.length > 0) {
+      hasVideoTracks = true;
+      videoTracks.forEach(function (track) {
+        enabled = enabled && track.enabled;
+      });
+    }
+  }); // If no videoTracks were found, that means there is no camera device.
+  // In that case, isVideoEnabled should return false.
+
+  if (!hasVideoTracks) {
+    return false;
+  }
+
+  return enabled;
+};
+
+LocalMedia.prototype._removeStream = function (stream) {
+  var idx = this.localStreams.indexOf(stream);
+
+  if (idx > -1) {
+    this.localStreams.splice(idx, 1);
+    this.emit('localStreamStopped', stream);
+  } else {
+    idx = this.localScreens.indexOf(stream);
+
+    if (idx > -1) {
+      this.localScreens.splice(idx, 1);
+      this.emit('localScreenStopped', stream);
+    }
+  }
+};
+
+LocalMedia.prototype._setupAudioMonitor = function (stream, harkOptions) {
+  this._log('Setup audio');
+
+  var audio = hark(stream, harkOptions);
+  var self = this;
+  var timeout;
+  audio.on('speaking', function () {
+    self.emit('speaking');
+  });
+  audio.on('stopped_speaking', function () {
+    if (timeout) {
+      clearTimeout(timeout);
+    }
+
+    timeout = setTimeout(function () {
+      self.emit('stoppedSpeaking');
+    }, 1000);
+  });
+  audio.on('volume_change', function (volume, threshold) {
+    self.emit('volumeChange', volume, threshold);
+  });
+
+  this._audioMonitors.push({
+    audio: audio,
+    stream: stream
+  });
+};
+
+LocalMedia.prototype._stopAudioMonitor = function (stream) {
+  var idx = -1;
+
+  this._audioMonitors.forEach(function (monitors, i) {
+    if (monitors.stream === stream) {
+      idx = i;
+    }
+  });
+
+  if (idx > -1) {
+    this._audioMonitors[idx].audio.stop();
+
+    this._audioMonitors.splice(idx, 1);
+  }
+}; // fallback for old .localScreen behaviour
+
+
+Object.defineProperty(LocalMedia.prototype, 'localScreen', {
+  get: function get() {
+    return this.localScreens.length > 0 ? this.localScreens[0] : null;
+  }
+});
+module.exports = LocalMedia;
+
+},{"./getscreenmedia":1,"hark":9,"mockconsole":11,"util":8,"wildemitter":31}],3:[function(require,module,exports){
+"use strict";
+
+var util = require('util');
+
+var webrtcSupport = require('webrtcsupport');
+
+var WildEmitter = require('wildemitter');
+
+function isAllTracksEnded(stream) {
+  var isAllTracksEnded = true;
+  stream.getTracks().forEach(function (t) {
+    isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+  });
+  return isAllTracksEnded;
+}
+
+function Peer(options) {
+  var self = this; // call emitter constructor
+
+  WildEmitter.call(this);
+  this.id = options.id;
+  this.parent = options.parent;
+  this.type = options.type || 'video';
+  this.oneway = options.oneway || false;
+  this.sharemyscreen = options.sharemyscreen || false;
+  this.browserPrefix = options.prefix;
+  this.stream = options.stream;
+  this.enableDataChannels = options.enableDataChannels === undefined ? this.parent.config.enableDataChannels : options.enableDataChannels;
+  this.receiveMedia = options.receiveMedia || this.parent.config.receiveMedia;
+  this.channels = {};
+  this.pendingDCMessages = []; // key (datachannel label) -> value (array[pending messages])
+
+  this.sid = options.sid || Date.now().toString();
+  this.pc = new RTCPeerConnection(this.parent.config.peerConnectionConfig);
+  this.pc.addEventListener('icecandidate', this.onIceCandidate.bind(this));
+  this.pc.addEventListener('endofcandidates', function (event) {
+    self.send('endOfCandidates', event);
+  });
+  this.pc.addEventListener('addstream', this.handleRemoteStreamAdded.bind(this));
+  this.pc.addEventListener('datachannel', this.handleDataChannelAdded.bind(this));
+  this.pc.addEventListener('removestream', this.handleStreamRemoved.bind(this)); // Just fire negotiation needed events for now
+  // When browser re-negotiation handling seems to work
+  // we can use this as the trigger for starting the offer/answer process
+  // automatically. We'll just leave it be for now while this stabalizes.
+
+  this.pc.addEventListener('negotiationneeded', this.emit.bind(this, 'negotiationNeeded'));
+  this.pc.addEventListener('iceconnectionstatechange', this.emit.bind(this, 'iceConnectionStateChange'));
+  this.pc.addEventListener('iceconnectionstatechange', function () {
+    switch (self.pc.iceConnectionState) {
+      case 'failed':
+        // currently, in chrome only the initiator goes to failed
+        // so we need to signal this to the peer
+        if (self.pc.localDescription.type === 'offer') {
+          self.parent.emit('iceFailed', self);
+          self.send('connectivityError');
+        }
+
+        break;
+    }
+  });
+  this.pc.addEventListener('signalingstatechange', this.emit.bind(this, 'signalingStateChange'));
+  this.logger = this.parent.logger; // handle screensharing/broadcast mode
+
+  if (options.type === 'screen') {
+    if (this.parent.localScreen && this.sharemyscreen) {
+      this.logger.log('adding local screen stream to peer connection');
+      this.pc.addStream(this.parent.localScreen);
+      this.broadcaster = options.broadcaster;
+    }
+  } else {
+    this.parent.localStreams.forEach(function (stream) {
+      self.pc.addStream(stream);
+    });
+  } // proxy events to parent
+
+
+  this.on('*', function () {
+    self.parent.emit.apply(self.parent, arguments);
+  });
+}
+
+util.inherits(Peer, WildEmitter);
+
+Peer.prototype.offer = function (options) {
+  this.pc.createOffer(options).then(function (offer) {
+    this.pc.setLocalDescription(offer).then(function () {
+      if (this.parent.config.nick) offer.nick = this.parent.config.nick;
+      this.send('offer', offer);
+    }.bind(this)).catch(function (error) {
+      console.warn("setLocalDescription for offer failed: ", error);
+    }.bind(this));
+  }.bind(this)).catch(function (error) {
+    console.warn("createOffer failed: ", error);
+  }.bind(this));
+};
+
+Peer.prototype.handleOffer = function (offer) {
+  this.pc.setRemoteDescription(offer).then(function () {
+    this.answer();
+  }.bind(this)).catch(function (error) {
+    console.warn("setRemoteDescription for offer failed: ", error);
+  }.bind(this));
+};
+
+Peer.prototype.answer = function () {
+  this.pc.createAnswer().then(function (answer) {
+    this.pc.setLocalDescription(answer).then(function () {
+      if (this.parent.config.nick) answer.nick = this.parent.config.nick;
+      this.send('answer', answer);
+    }.bind(this)).catch(function (error) {
+      console.warn("setLocalDescription for answer failed: ", error);
+    }.bind(this));
+  }.bind(this)).catch(function (error) {
+    console.warn("createAnswer failed: ", error);
+  }.bind(this));
+};
+
+Peer.prototype.handleAnswer = function (answer) {
+  this.pc.setRemoteDescription(answer).catch(function (error) {
+    console.warn("setRemoteDescription for answer failed: ", error);
+  }.bind(this));
+};
+
+Peer.prototype.handleMessage = function (message) {
+  var self = this;
+  this.logger.log('getting', message.type, message);
+  if (message.prefix) this.browserPrefix = message.prefix;
+
+  if (message.type === 'offer') {
+    if (!this.nick) this.nick = message.payload.nick;
+    delete message.payload.nick;
+    this.handleOffer(message.payload);
+  } else if (message.type === 'answer') {
+    if (!this.nick) this.nick = message.payload.nick;
+    delete message.payload.nick;
+    this.handleAnswer(message.payload);
+  } else if (message.type === 'candidate') {
+    this.pc.addIceCandidate(message.payload.candidate);
+  } else if (message.type === 'connectivityError') {
+    this.parent.emit('connectivityError', self);
+  } else if (message.type === 'mute') {
+    this.parent.emit('mute', {
+      id: message.from,
+      name: message.payload.name
+    });
+  } else if (message.type === 'unmute') {
+    this.parent.emit('unmute', {
+      id: message.from,
+      name: message.payload.name
+    });
+  } else if (message.type === 'endOfCandidates') {
+    this.pc.addIceCandidate('');
+  } else if (message.type === 'unshareScreen') {
+    this.parent.emit('unshareScreen', {
+      id: message.from
+    });
+    this.end();
+  }
+}; // send via signalling channel
+
+
+Peer.prototype.send = function (messageType, payload) {
+  var message = {
+    to: this.id,
+    sid: this.sid,
+    broadcaster: this.broadcaster,
+    roomType: this.type,
+    type: messageType,
+    payload: payload,
+    prefix: webrtcSupport.prefix
+  };
+  this.logger.log('sending', messageType, message);
+  this.parent.emit('message', message);
+}; // send via data channel
+// returns true when message was sent and false if channel is not open
+
+
+Peer.prototype.sendDirectly = function (channel, messageType, payload) {
+  var message = {
+    type: messageType,
+    payload: payload
+  };
+  this.logger.log('sending via datachannel', channel, messageType, message);
+  var dc = this.getDataChannel(channel);
+
+  if (dc.readyState != 'open') {
+    if (!this.pendingDCMessages.hasOwnProperty(channel)) {
+      this.pendingDCMessages[channel] = [];
+    }
+
+    this.pendingDCMessages[channel].push(message);
+    return false;
+  }
+
+  dc.send(JSON.stringify(message));
+  return true;
+}; // Internal method registering handlers for a data channel and emitting events on the peer
+
+
+Peer.prototype._observeDataChannel = function (channel) {
+  var self = this;
+  channel.onclose = this.emit.bind(this, 'channelClose', channel);
+  channel.onerror = this.emit.bind(this, 'channelError', channel);
+
+  channel.onmessage = function (event) {
+    self.emit('channelMessage', self, channel.label, JSON.parse(event.data), channel, event);
+  };
+
+  channel.onopen = function () {
+    self.emit('channelOpen', channel); // Check if there are messages that could not be send
+
+    if (self.pendingDCMessages.hasOwnProperty(channel.label)) {
+      var pendingMessages = self.pendingDCMessages[channel.label];
+
+      for (var i = 0; i < pendingMessages.length; i++) {
+        self.sendDirectly(channel.label, pendingMessages[i].type, pendingMessages[i].payload);
+      }
+
+      self.pendingDCMessages[channel.label] = [];
+    }
+  };
+}; // Fetch or create a data channel by the given name
+
+
+Peer.prototype.getDataChannel = function (name, opts) {
+  if (!webrtcSupport.supportDataChannel) return this.emit('error', new Error('createDataChannel not supported'));
+  var channel = this.channels[name];
+  opts || (opts = {});
+  if (channel) return channel; // if we don't have one by this label, create it
+
+  channel = this.channels[name] = this.pc.createDataChannel(name, opts);
+
+  this._observeDataChannel(channel);
+
+  return channel;
+};
+
+Peer.prototype.onIceCandidate = function (event) {
+  var candidate = event.candidate;
+  if (this.closed) return;
+
+  if (candidate) {
+    var pcConfig = this.parent.config.peerConnectionConfig;
+
+    if (webrtcSupport.prefix === 'moz' && pcConfig && pcConfig.iceTransports && candidate.candidate && candidate.candidate.candidate && candidate.candidate.candidate.indexOf(pcConfig.iceTransports) < 0) {
+      this.logger.log('Ignoring ice candidate not matching pcConfig iceTransports type: ', pcConfig.iceTransports);
+    } else {
+      // Retain legacy data structure for compatibility with
+      // mobile clients.
+      var expandedCandidate = {
+        candidate: {
+          candidate: candidate.candidate,
+          sdpMid: candidate.sdpMid,
+          sdpMLineIndex: candidate.sdpMLineIndex
+        }
+      };
+      this.send('candidate', expandedCandidate);
+    }
+  } else {
+    this.logger.log("End of candidates.");
+  }
+};
+
+Peer.prototype.start = function () {
+  var self = this; // well, the webrtc api requires that we either
+  // a) create a datachannel a priori
+  // b) do a renegotiation later to add the SCTP m-line
+  // Let's do (a) first...
+
+  if (this.enableDataChannels) {
+    this.getDataChannel('simplewebrtc');
+  }
+
+  this.offer(this.receiveMedia);
+};
+
+Peer.prototype.icerestart = function () {
+  var constraints = this.receiveMedia;
+  constraints.iceRestart = true;
+  this.offer(constraints);
+};
+
+Peer.prototype.end = function () {
+  if (this.closed) return;
+  this.pc.close();
+  this.handleStreamRemoved();
+};
+
+Peer.prototype.handleRemoteStreamAdded = function (event) {
+  var self = this;
+
+  if (this.stream) {
+    this.logger.warn('Already have a remote stream');
+  } else {
+    this.stream = event.stream;
+    this.stream.getTracks().forEach(function (track) {
+      track.addEventListener('ended', function () {
+        if (isAllTracksEnded(self.stream)) {
+          self.end();
+        }
+      });
+    });
+    this.parent.emit('peerStreamAdded', this);
+  }
+};
+
+Peer.prototype.handleStreamRemoved = function () {
+  var peerIndex = this.parent.peers.indexOf(this);
+
+  if (peerIndex > -1) {
+    this.parent.peers.splice(peerIndex, 1);
+    this.closed = true;
+    this.parent.emit('peerStreamRemoved', this);
+  }
+};
+
+Peer.prototype.handleDataChannelAdded = function (event) {
+  var channel = event.channel;
+  this.channels[channel.label] = channel;
+
+  this._observeDataChannel(channel);
+};
+
+module.exports = Peer;
+
+},{"util":8,"webrtcsupport":30,"wildemitter":31}],4:[function(require,module,exports){
+"use strict";
+
+var WebRTC = require('./webrtc');
+
+var WildEmitter = require('wildemitter');
+
+var webrtcSupport = require('webrtcsupport');
+
+var attachMediaStream = require('attachmediastream');
+
+var mockconsole = require('mockconsole');
+
+function SimpleWebRTC(opts) {
+  var self = this;
+  var options = opts || {};
+  var config = this.config = {
+    socketio: {
+      /* 'force new connection':true*/
+    },
+    connection: null,
+    debug: false,
+    localVideoEl: '',
+    remoteVideosEl: '',
+    enableDataChannels: true,
+    autoRequestMedia: false,
+    autoRemoveVideos: true,
+    adjustPeerVolume: false,
+    peerVolumeWhenSpeaking: 0.25,
+    media: {
+      video: true,
+      audio: true
+    },
+    receiveMedia: {
+      offerToReceiveAudio: 1,
+      offerToReceiveVideo: 1
+    },
+    localVideo: {
+      autoplay: true,
+      mirror: true,
+      muted: true
+    }
+  };
+  var item, connection; // We also allow a 'logger' option. It can be any object that implements
+  // log, warn, and error methods.
+  // We log nothing by default, following "the rule of silence":
+  // http://www.linfo.org/rule_of_silence.html
+
+  this.logger = function () {
+    // we assume that if you're in debug mode and you didn't
+    // pass in a logger, you actually want to log as much as
+    // possible.
+    if (opts.debug) {
+      return opts.logger || console;
+    } else {
+      // or we'll use your logger which should have its own logic
+      // for output. Or we'll return the no-op.
+      return opts.logger || mockconsole;
+    }
+  }(); // set our config from options
+
+
+  for (item in options) {
+    if (options.hasOwnProperty(item)) {
+      this.config[item] = options[item];
+    }
+  } // attach detected support for convenience
+
+
+  this.capabilities = webrtcSupport; // call WildEmitter constructor
+
+  WildEmitter.call(this);
+
+  if (this.config.connection === null) {
+    throw 'no connection object given in the configuration';
+  } else {
+    connection = this.connection = this.config.connection;
+  }
+
+  connection.on('connect', function () {
+    self.emit('connectionReady', connection.getSessionid());
+    self.sessionReady = true;
+    self.testReadiness();
+  });
+  connection.on('message', function (message) {
+    var peers = self.webrtc.getPeers(message.from, message.roomType);
+    var peer;
+
+    if (message.type === 'offer') {
+      if (peers.length) {
+        peers.forEach(function (p) {
+          if (p.sid == message.sid) peer = p;
+        }); //if (!peer) peer = peers[0]; // fallback for old protocol versions
+      }
+
+      if (!peer) {
+        peer = self.webrtc.createPeer({
+          id: message.from,
+          sid: message.sid,
+          type: message.roomType,
+          enableDataChannels: self.config.enableDataChannels && message.roomType !== 'screen',
+          sharemyscreen: message.roomType === 'screen' && !message.broadcaster,
+          broadcaster: message.roomType === 'screen' && !message.broadcaster ? self.connection.getSessionid() : null
+        });
+        self.emit('createdPeer', peer);
+      }
+
+      peer.handleMessage(message);
+    } else if (peers.length) {
+      peers.forEach(function (peer) {
+        if (message.sid) {
+          if (peer.sid === message.sid) {
+            peer.handleMessage(message);
+          }
+        } else {
+          peer.handleMessage(message);
+        }
+      });
+    }
+  });
+  connection.on('remove', function (room) {
+    if (room.id !== self.connection.getSessionid()) {
+      self.webrtc.removePeers(room.id, room.type);
+    }
+  }); // instantiate our main WebRTC helper
+  // using same logger from logic here
+
+  opts.logger = this.logger;
+  opts.debug = false;
+  this.webrtc = new WebRTC(opts); // attach a few methods from underlying lib to simple.
+
+  ['mute', 'unmute', 'pauseVideo', 'resumeVideo', 'pause', 'resume', 'sendToAll', 'sendDirectlyToAll', 'getPeers', 'createPeer', 'removePeers'].forEach(function (method) {
+    self[method] = self.webrtc[method].bind(self.webrtc);
+  }); // proxy events from WebRTC
+
+  this.webrtc.on('*', function () {
+    self.emit.apply(self, arguments);
+  }); // log all events in debug mode
+
+  if (config.debug) {
+    this.on('*', this.logger.log.bind(this.logger, 'SimpleWebRTC event:'));
+  } // check for readiness
+
+
+  this.webrtc.on('localStream', function () {
+    self.testReadiness();
+  });
+  this.webrtc.on('message', function (payload) {
+    self.connection.emit('message', payload);
+  });
+  this.webrtc.on('peerStreamAdded', this.handlePeerStreamAdded.bind(this));
+  this.webrtc.on('peerStreamRemoved', this.handlePeerStreamRemoved.bind(this)); // echo cancellation attempts
+
+  if (this.config.adjustPeerVolume) {
+    this.webrtc.on('speaking', this.setVolumeForAll.bind(this, this.config.peerVolumeWhenSpeaking));
+    this.webrtc.on('stoppedSpeaking', this.setVolumeForAll.bind(this, 1));
+  }
+
+  connection.on('stunservers', function (args) {
+    // resets/overrides the config
+    self.webrtc.config.peerConnectionConfig.iceServers = args;
+    self.emit('stunservers', args);
+  });
+  connection.on('turnservers', function (args) {
+    // appends to the config
+    self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
+    self.emit('turnservers', args);
+  });
+  this.webrtc.on('iceFailed', function (peer) {// local ice failure
+  });
+  this.webrtc.on('connectivityError', function (peer) {// remote ice failure
+  }); // sending mute/unmute to all peers
+
+  this.webrtc.on('audioOn', function () {
+    self.webrtc.sendToAll('unmute', {
+      name: 'audio'
+    });
+  });
+  this.webrtc.on('audioOff', function () {
+    self.webrtc.sendToAll('mute', {
+      name: 'audio'
+    });
+  });
+  this.webrtc.on('videoOn', function () {
+    self.webrtc.sendToAll('unmute', {
+      name: 'video'
+    });
+  });
+  this.webrtc.on('videoOff', function () {
+    self.webrtc.sendToAll('mute', {
+      name: 'video'
+    });
+  }); // screensharing events
+
+  this.webrtc.on('localScreen', function (stream) {
+    var item,
+        el = document.createElement('video'),
+        container = self.getRemoteVideoContainer();
+
+    el.oncontextmenu = function () {
+      return false;
+    };
+
+    el.id = 'localScreen';
+    attachMediaStream(stream, el);
+
+    if (container) {
+      container.appendChild(el);
+    }
+
+    self.emit('localScreenAdded', el);
+    self.connection.emit('shareScreen'); // NOTE: we don't create screen peers for existing video peers here,
+    // this is done by the application code in "webrtc.js".
+  });
+  this.webrtc.on('localScreenStopped', function (stream) {
+    if (self.getLocalScreen()) {
+      self.stopScreenShare();
+    }
+    /*
+    self.connection.emit('unshareScreen');
+    self.webrtc.peers.forEach(function (peer) {
+    	if (peer.sharemyscreen) {
+    		peer.end();
+    	}
+    });
+    */
+
+  });
+  this.webrtc.on('channelMessage', function (peer, label, data) {
+    if (data.type == 'volume') {
+      self.emit('remoteVolumeChange', peer, data.volume);
+    }
+  });
+}
+
+SimpleWebRTC.prototype = Object.create(WildEmitter.prototype, {
+  constructor: {
+    value: SimpleWebRTC
+  }
+});
+
+SimpleWebRTC.prototype.leaveCall = function () {
+  if (this.roomName) {
+    while (this.webrtc.peers.length) {
+      this.webrtc.peers[0].end();
+    }
+
+    if (this.getLocalScreen()) {
+      this.stopScreenShare();
+    }
+
+    this.emit('leftRoom', this.roomName);
+    this.stopLocalVideo();
+    this.roomName = undefined;
+  }
+};
+
+SimpleWebRTC.prototype.disconnect = function () {
+  this.connection.disconnect();
+  delete this.connection;
+};
+
+SimpleWebRTC.prototype.handlePeerStreamAdded = function (peer) {
+  var self = this;
+  var container = this.getRemoteVideoContainer();
+  var video = attachMediaStream(peer.stream); // At least Firefox, Opera and Edge move the video to a wrong position
+  // instead of keeping it unchanged	when "transform: scaleX(1)" is used
+  // ("transform: scaleX(-1)" is fine); as it should have no effect the
+  // transform is removed.
+
+  if (video.style.transform === 'scaleX(1)') {
+    video.style.transform = '';
+  } // store video element as part of peer for easy removal
+
+
+  peer.videoEl = video;
+  video.id = this.getDomId(peer);
+  if (container) container.appendChild(video);
+  this.emit('videoAdded', video, peer); // send our mute status to new peer if we're muted
+  // currently called with a small delay because it arrives before
+  // the video element is created otherwise (which happens after
+  // the async setRemoteDescription-createAnswer)
+
+  window.setTimeout(function () {
+    if (!self.webrtc.isAudioEnabled()) {
+      peer.send('mute', {
+        name: 'audio'
+      });
+    }
+
+    if (!self.webrtc.isVideoEnabled()) {
+      peer.send('mute', {
+        name: 'video'
+      });
+    }
+  }, 250);
+};
+
+SimpleWebRTC.prototype.handlePeerStreamRemoved = function (peer) {
+  var container = this.getRemoteVideoContainer();
+  var videoEl = peer.videoEl;
+
+  if (this.config.autoRemoveVideos && container && videoEl) {
+    container.removeChild(videoEl);
+  }
+
+  if (videoEl) this.emit('videoRemoved', videoEl, peer);
+};
+
+SimpleWebRTC.prototype.getDomId = function (peer) {
+  return [peer.id, peer.type, peer.broadcaster ? 'broadcasting' : 'incoming'].join('_');
+}; // set volume on video tag for all peers takse a value between 0 and 1
+
+
+SimpleWebRTC.prototype.setVolumeForAll = function (volume) {
+  this.webrtc.peers.forEach(function (peer) {
+    if (peer.videoEl) peer.videoEl.volume = volume;
+  });
+};
+
+SimpleWebRTC.prototype.joinCall = function (name) {
+  if (this.config.autoRequestMedia) this.startLocalVideo();
+  this.roomName = name;
+  this.emit('joinedRoom', name);
+};
+
+SimpleWebRTC.prototype.getEl = function (idOrEl) {
+  if (typeof idOrEl === 'string') {
+    return document.getElementById(idOrEl);
+  } else {
+    return idOrEl;
+  }
+};
+
+SimpleWebRTC.prototype.startLocalVideo = function () {
+  var self = this;
+  this.webrtc.start(this.config.media, function (err, stream) {
+    if (err) {
+      self.emit('localMediaError', err);
+    } else {
+      self.emit('localMediaStarted', self.config.media);
+      attachMediaStream(stream, self.getLocalVideoContainer(), self.config.localVideo);
+    }
+  });
+};
+
+SimpleWebRTC.prototype.stopLocalVideo = function () {
+  this.webrtc.stop();
+}; // this accepts either element ID or element
+// and either the video tag itself or a container
+// that will be used to put the video tag into.
+
+
+SimpleWebRTC.prototype.getLocalVideoContainer = function () {
+  var el = this.getEl(this.config.localVideoEl);
+
+  if (el && el.tagName === 'VIDEO') {
+    el.oncontextmenu = function () {
+      return false;
+    };
+
+    return el;
+  } else if (el) {
+    var video = document.createElement('video');
+
+    video.oncontextmenu = function () {
+      return false;
+    };
+
+    el.appendChild(video);
+    return video;
+  } else {
+    return;
+  }
+};
+
+SimpleWebRTC.prototype.getRemoteVideoContainer = function () {
+  return this.getEl(this.config.remoteVideosEl);
+};
+
+SimpleWebRTC.prototype.shareScreen = function (mode, cb) {
+  this.webrtc.startScreenShare(mode, cb);
+};
+
+SimpleWebRTC.prototype.getLocalScreen = function () {
+  return this.webrtc.localScreen;
+};
+
+SimpleWebRTC.prototype.stopScreenShare = function () {
+  this.connection.emit('unshareScreen');
+  var videoEl = document.getElementById('localScreen');
+  var container = this.getRemoteVideoContainer();
+
+  if (this.config.autoRemoveVideos && container && videoEl) {
+    container.removeChild(videoEl);
+  } // a hack to emit the event the removes the video
+  // element that we want
+
+
+  if (videoEl) {
+    this.emit('videoRemoved', videoEl);
+  }
+
+  if (this.getLocalScreen()) {
+    this.webrtc.stopScreenShare();
+  } // Notify peers were sending to.
+
+
+  this.webrtc.peers.forEach(function (peer) {
+    if (peer.type === 'screen' && peer.sharemyscreen) {
+      peer.send('unshareScreen');
+    }
+
+    if (peer.broadcaster) {
+      peer.end();
+    }
+  });
+};
+
+SimpleWebRTC.prototype.testReadiness = function () {
+  var self = this;
+
+  if (this.sessionReady) {
+    if (!this.config.media.video && !this.config.media.audio) {
+      self.emit('readyToCall', self.connection.getSessionid());
+    } else if (this.webrtc.localStreams.length > 0) {
+      self.emit('readyToCall', self.connection.getSessionid());
+    }
+  }
+};
+
+SimpleWebRTC.prototype.createRoom = function (name, cb) {
+  this.roomName = name;
+
+  if (arguments.length === 2) {
+    this.connection.emit('create', name, cb);
+  } else {
+    this.connection.emit('create', name);
+  }
+};
+
+module.exports = SimpleWebRTC;
+
+},{"./webrtc":5,"attachmediastream":6,"mockconsole":11,"webrtcsupport":30,"wildemitter":31}],5:[function(require,module,exports){
+"use strict";
+
+var util = require('util');
+
+var webrtcSupport = require('webrtcsupport');
+
+var mockconsole = require('mockconsole');
+
+var localMedia = require('./localmedia');
+
+var Peer = require('./peer');
+
+function WebRTC(opts) {
+  var self = this;
+  var options = opts || {};
+  var config = this.config = {
+    debug: false,
+    // makes the entire PC config overridable
+    peerConnectionConfig: {
+      iceServers: []
+    },
+    receiveMedia: {
+      offerToReceiveAudio: 1,
+      offerToReceiveVideo: 1
+    },
+    enableDataChannels: true
+  };
+  var item; // We also allow a 'logger' option. It can be any object that implements
+  // log, warn, and error methods.
+  // We log nothing by default, following "the rule of silence":
+  // http://www.linfo.org/rule_of_silence.html
+
+  this.logger = function () {
+    // we assume that if you're in debug mode and you didn't
+    // pass in a logger, you actually want to log as much as
+    // possible.
+    if (opts.debug) {
+      return opts.logger || console;
+    } else {
+      // or we'll use your logger which should have its own logic
+      // for output. Or we'll return the no-op.
+      return opts.logger || mockconsole;
+    }
+  }(); // set options
+
+
+  for (item in options) {
+    if (options.hasOwnProperty(item)) {
+      this.config[item] = options[item];
+    }
+  } // check for support
+
+
+  if (!webrtcSupport.support) {
+    this.logger.error('Your browser doesn\'t seem to support WebRTC');
+  } // where we'll store our peer connections
+
+
+  this.peers = []; // call localMedia constructor
+
+  localMedia.call(this, this.config);
+  this.on('speaking', function () {
+    if (!self.hardMuted) {
+      // FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+      self.peers.forEach(function (peer) {
+        if (peer.enableDataChannels) {
+          var dc = peer.getDataChannel('hark');
+          if (dc.readyState != 'open') return;
+          dc.send(JSON.stringify({
+            type: 'speaking'
+          }));
+        }
+      });
+    }
+  });
+  this.on('stoppedSpeaking', function () {
+    if (!self.hardMuted) {
+      // FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+      self.peers.forEach(function (peer) {
+        if (peer.enableDataChannels) {
+          var dc = peer.getDataChannel('hark');
+          if (dc.readyState != 'open') return;
+          dc.send(JSON.stringify({
+            type: 'stoppedSpeaking'
+          }));
+        }
+      });
+    }
+  });
+  this.on('volumeChange', function (volume, treshold) {
+    if (!self.hardMuted) {
+      // FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+      self.peers.forEach(function (peer) {
+        if (peer.enableDataChannels) {
+          var dc = peer.getDataChannel('hark');
+          if (dc.readyState != 'open') return;
+          dc.send(JSON.stringify({
+            type: 'volume',
+            volume: volume
+          }));
+        }
+      });
+    }
+  });
+  this.on('unshareScreen', function (message) {
+    // End peers we were receiving the screensharing stream from.
+    var peers = self.getPeers(message.from, 'screen');
+    peers.forEach(function (peer) {
+      if (!peer.sharemyscreen) {
+        peer.end();
+      }
+    });
+  }); // log events in debug mode
+
+  if (this.config.debug) {
+    this.on('*', function (event, val1, val2) {
+      var logger; // if you didn't pass in a logger and you explicitly turning on debug
+      // we're just going to assume you're wanting log output with console
+
+      if (self.config.logger === mockconsole) {
+        logger = console;
+      } else {
+        logger = self.logger;
+      }
+
+      logger.log('event:', event, val1, val2);
+    });
+  }
+}
+
+util.inherits(WebRTC, localMedia);
+
+WebRTC.prototype.createPeer = function (opts) {
+  var peer;
+  opts.parent = this;
+  peer = new Peer(opts);
+  this.peers.push(peer);
+  return peer;
+}; // removes peers
+
+
+WebRTC.prototype.removePeers = function (id, type) {
+  this.getPeers(id, type).forEach(function (peer) {
+    peer.end();
+  });
+}; // fetches all Peer objects by session id and/or type
+
+
+WebRTC.prototype.getPeers = function (sessionId, type) {
+  return this.peers.filter(function (peer) {
+    return (!sessionId || peer.id === sessionId) && (!type || peer.type === type);
+  });
+}; // sends message to all
+
+
+WebRTC.prototype.sendToAll = function (message, payload) {
+  this.peers.forEach(function (peer) {
+    peer.send(message, payload);
+  });
+}; // sends message to all using a datachannel
+// only sends to anyone who has an open datachannel
+
+
+WebRTC.prototype.sendDirectlyToAll = function (channel, message, payload) {
+  this.peers.forEach(function (peer) {
+    if (peer.enableDataChannels) {
+      peer.sendDirectly(channel, message, payload);
+    }
+  });
+};
+
+module.exports = WebRTC;
+
+},{"./localmedia":2,"./peer":3,"mockconsole":11,"util":8,"webrtcsupport":30}],6:[function(require,module,exports){
+"use strict";
+
+var adapter = require('webrtc-adapter');
+
+module.exports = function (stream, el, options) {
+  var item;
+  var element = el;
+  var opts = {
+    autoplay: true,
+    mirror: false,
+    muted: false,
+    audio: false,
+    disableContextMenu: false
+  };
+
+  if (options) {
+    for (item in options) {
+      opts[item] = options[item];
+    }
+  }
+
+  if (!element) {
+    element = document.createElement(opts.audio ? 'audio' : 'video');
+  } else if (element.tagName.toLowerCase() === 'audio') {
+    opts.audio = true;
+  }
+
+  if (opts.disableContextMenu) {
+    element.oncontextmenu = function (e) {
+      e.preventDefault();
+    };
+  }
+
+  if (opts.autoplay) element.autoplay = 'autoplay';
+  element.muted = !!opts.muted;
+
+  if (!opts.audio) {
+    ['', 'moz', 'webkit', 'o', 'ms'].forEach(function (prefix) {
+      var styleName = prefix ? prefix + 'Transform' : 'transform';
+      element.style[styleName] = opts.mirror ? 'scaleX(-1)' : 'scaleX(1)';
+    });
+  }
+
+  if (adapter.browserDetails.browser === 'safari') {
+    element.setAttribute('playsinline', true);
+  }
+
+  element.srcObject = stream;
+  return element;
+};
+
+},{"webrtc-adapter":15}],7:[function(require,module,exports){
+"use strict";
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+module.exports = function isBuffer(arg) {
+  return arg && _typeof(arg) === 'object' && typeof arg.copy === 'function' && typeof arg.fill === 'function' && typeof arg.readUInt8 === 'function';
+};
+
+},{}],8:[function(require,module,exports){
+(function (process,global){
+"use strict";
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+var formatRegExp = /%[sdj%]/g;
+
+exports.format = function (f) {
+  if (!isString(f)) {
+    var objects = [];
+
+    for (var i = 0; i < arguments.length; i++) {
+      objects.push(inspect(arguments[i]));
+    }
+
+    return objects.join(' ');
+  }
+
+  var i = 1;
+  var args = arguments;
+  var len = args.length;
+  var str = String(f).replace(formatRegExp, function (x) {
+    if (x === '%%') return '%';
+    if (i >= len) return x;
+
+    switch (x) {
+      case '%s':
+        return String(args[i++]);
+
+      case '%d':
+        return Number(args[i++]);
+
+      case '%j':
+        try {
+          return JSON.stringify(args[i++]);
+        } catch (_) {
+          return '[Circular]';
+        }
+
+      default:
+        return x;
+    }
+  });
+
+  for (var x = args[i]; i < len; x = args[++i]) {
+    if (isNull(x) || !isObject(x)) {
+      str += ' ' + x;
+    } else {
+      str += ' ' + inspect(x);
+    }
+  }
+
+  return str;
+}; // Mark that a method should not be used.
+// Returns a modified function which warns once by default.
+// If --no-deprecation is set, then it is a no-op.
+
+
+exports.deprecate = function (fn, msg) {
+  // Allow for deprecating things in the process of starting up.
+  if (isUndefined(global.process)) {
+    return function () {
+      return exports.deprecate(fn, msg).apply(this, arguments);
+    };
+  }
+
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var warned = false;
+
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
+      }
+
+      warned = true;
+    }
+
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+};
+
+var debugs = {};
+var debugEnviron;
+
+exports.debuglog = function (set) {
+  if (isUndefined(debugEnviron)) debugEnviron = process.env.NODE_DEBUG || '';
+  set = set.toUpperCase();
+
+  if (!debugs[set]) {
+    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
+      var pid = process.pid;
+
+      debugs[set] = function () {
+        var msg = exports.format.apply(exports, arguments);
+        console.error('%s %d: %s', set, pid, msg);
+      };
+    } else {
+      debugs[set] = function () {};
+    }
+  }
+
+  return debugs[set];
+};
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Object} opts Optional options object that alters the output.
+ */
+
+/* legacy: obj, showHidden, depth, colors*/
+
+
+function inspect(obj, opts) {
+  // default options
+  var ctx = {
+    seen: [],
+    stylize: stylizeNoColor
+  }; // legacy...
+
+  if (arguments.length >= 3) ctx.depth = arguments[2];
+  if (arguments.length >= 4) ctx.colors = arguments[3];
+
+  if (isBoolean(opts)) {
+    // legacy...
+    ctx.showHidden = opts;
+  } else if (opts) {
+    // got an "options" object
+    exports._extend(ctx, opts);
+  } // set default options
+
+
+  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
+  if (isUndefined(ctx.depth)) ctx.depth = 2;
+  if (isUndefined(ctx.colors)) ctx.colors = false;
+  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
+  if (ctx.colors) ctx.stylize = stylizeWithColor;
+  return formatValue(ctx, obj, ctx.depth);
+}
+
+exports.inspect = inspect; // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
+
+inspect.colors = {
+  'bold': [1, 22],
+  'italic': [3, 23],
+  'underline': [4, 24],
+  'inverse': [7, 27],
+  'white': [37, 39],
+  'grey': [90, 39],
+  'black': [30, 39],
+  'blue': [34, 39],
+  'cyan': [36, 39],
+  'green': [32, 39],
+  'magenta': [35, 39],
+  'red': [31, 39],
+  'yellow': [33, 39]
+}; // Don't use 'blue' not visible on cmd.exe
+
+inspect.styles = {
+  'special': 'cyan',
+  'number': 'yellow',
+  'boolean': 'yellow',
+  'undefined': 'grey',
+  'null': 'bold',
+  'string': 'green',
+  'date': 'magenta',
+  // "name": intentionally not styling
+  'regexp': 'red'
+};
+
+function stylizeWithColor(str, styleType) {
+  var style = inspect.styles[styleType];
+
+  if (style) {
+    return "\x1B[" + inspect.colors[style][0] + 'm' + str + "\x1B[" + inspect.colors[style][1] + 'm';
+  } else {
+    return str;
+  }
+}
+
+function stylizeNoColor(str, styleType) {
+  return str;
+}
+
+function arrayToHash(array) {
+  var hash = {};
+  array.forEach(function (val, idx) {
+    hash[val] = true;
+  });
+  return hash;
+}
+
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (ctx.customInspect && value && isFunction(value.inspect) && // Filter out the util module, it's inspect function is special
+  value.inspect !== exports.inspect && // Also filter out any prototype objects using the circular check.
+  !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+
+    if (!isString(ret)) {
+      ret = formatValue(ctx, ret, recurseTimes);
+    }
+
+    return ret;
+  } // Primitive types cannot have properties
+
+
+  var primitive = formatPrimitive(ctx, value);
+
+  if (primitive) {
+    return primitive;
+  } // Look up the keys of the object.
+
+
+  var keys = Object.keys(value);
+  var visibleKeys = arrayToHash(keys);
+
+  if (ctx.showHidden) {
+    keys = Object.getOwnPropertyNames(value);
+  } // IE doesn't make error fields non-enumerable
+  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+
+
+  if (isError(value) && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
+    return formatError(value);
+  } // Some type of object without properties can be shortcutted.
+
+
+  if (keys.length === 0) {
+    if (isFunction(value)) {
+      var name = value.name ? ': ' + value.name : '';
+      return ctx.stylize('[Function' + name + ']', 'special');
+    }
+
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+    }
+
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
+
+  var base = '',
+      array = false,
+      braces = ['{', '}']; // Make Array say that they are Array
+
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  } // Make functions say that they are functions
+
+
+  if (isFunction(value)) {
+    var n = value.name ? ': ' + value.name : '';
+    base = ' [Function' + n + ']';
+  } // Make RegExps say that they are RegExps
+
+
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
+  } // Make dates with properties first say the date
+
+
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  } // Make error with message first say the error
+
+
+  if (isError(value)) {
+    base = ' ' + formatError(value);
+  }
+
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
+
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+  var output;
+
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else {
+    output = keys.map(function (key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
+    });
+  }
+
+  ctx.seen.pop();
+  return reduceToSingleString(output, base, braces);
+}
+
+function formatPrimitive(ctx, value) {
+  if (isUndefined(value)) return ctx.stylize('undefined', 'undefined');
+
+  if (isString(value)) {
+    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '').replace(/'/g, "\\'").replace(/\\"/g, '"') + '\'';
+    return ctx.stylize(simple, 'string');
+  }
+
+  if (isNumber(value)) return ctx.stylize('' + value, 'number');
+  if (isBoolean(value)) return ctx.stylize('' + value, 'boolean'); // For some reason typeof null is "object", so special case here.
+
+  if (isNull(value)) return ctx.stylize('null', 'null');
+}
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (hasOwnProperty(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys, String(i), true));
+    } else {
+      output.push('');
+    }
+  }
+
+  keys.forEach(function (key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys, key, true));
+    }
+  });
+  return output;
+}
+
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name, str, desc;
+  desc = Object.getOwnPropertyDescriptor(value, key) || {
+    value: value[key]
+  };
+
+  if (desc.get) {
+    if (desc.set) {
+      str = ctx.stylize('[Getter/Setter]', 'special');
+    } else {
+      str = ctx.stylize('[Getter]', 'special');
+    }
+  } else {
+    if (desc.set) {
+      str = ctx.stylize('[Setter]', 'special');
+    }
+  }
+
+  if (!hasOwnProperty(visibleKeys, key)) {
+    name = '[' + key + ']';
+  }
+
+  if (!str) {
+    if (ctx.seen.indexOf(desc.value) < 0) {
+      if (isNull(recurseTimes)) {
+        str = formatValue(ctx, desc.value, null);
+      } else {
+        str = formatValue(ctx, desc.value, recurseTimes - 1);
+      }
+
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function (line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function (line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+
+  if (isUndefined(name)) {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+
+    name = JSON.stringify('' + key);
+
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'").replace(/\\"/g, '"').replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
+
+function reduceToSingleString(output, base, braces) {
+  var numLinesEst = 0;
+  var length = output.reduce(function (prev, cur) {
+    numLinesEst++;
+    if (cur.indexOf('\n') >= 0) numLinesEst++;
+    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+  }, 0);
+
+  if (length > 60) {
+    return braces[0] + (base === '' ? '' : base + '\n ') + ' ' + output.join(',\n  ') + ' ' + braces[1];
+  }
+
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+} // NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+
+
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return _typeof(arg) === 'symbol';
+}
+
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return _typeof(arg) === 'object' && arg !== null;
+}
+
+exports.isObject = isObject;
+
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+
+exports.isDate = isDate;
+
+function isError(e) {
+  return isObject(e) && (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null || typeof arg === 'boolean' || typeof arg === 'number' || typeof arg === 'string' || _typeof(arg) === 'symbol' || // ES6 symbol
+  typeof arg === 'undefined';
+}
+
+exports.isPrimitive = isPrimitive;
+exports.isBuffer = require('./support/isBuffer');
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+function pad(n) {
+  return n < 10 ? '0' + n.toString(10) : n.toString(10);
+}
+
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']; // 26 Feb 16:19:34
+
+function timestamp() {
+  var d = new Date();
+  var time = [pad(d.getHours()), pad(d.getMinutes()), pad(d.getSeconds())].join(':');
+  return [d.getDate(), months[d.getMonth()], time].join(' ');
+} // log is just a thin wrapper to console.log that prepends a timestamp
+
+
+exports.log = function () {
+  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
+};
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * The Function.prototype.inherits from lang.js rewritten as a standalone
+ * function (not on Function.prototype). NOTE: If this file is to be loaded
+ * during bootstrapping this function needs to be rewritten using some native
+ * functions as prototype setup using normal JavaScript does not work as
+ * expected during bootstrapping (see mirror.js in r114903).
+ *
+ * @param {function} ctor Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor Constructor function to inherit prototype from.
+ */
+
+
+exports.inherits = require('inherits');
+
+exports._extend = function (origin, add) {
+  // Don't do anything if add isn't an object
+  if (!add || !isObject(add)) return origin;
+  var keys = Object.keys(add);
+  var i = keys.length;
+
+  while (i--) {
+    origin[keys[i]] = add[keys[i]];
+  }
+
+  return origin;
+};
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./support/isBuffer":7,"_process":12,"inherits":10}],9:[function(require,module,exports){
+"use strict";
+
+var WildEmitter = require('wildemitter');
+
+function getMaxVolume(analyser, fftBins) {
+  var maxVolume = -Infinity;
+  analyser.getFloatFrequencyData(fftBins);
+
+  for (var i = 4, ii = fftBins.length; i < ii; i++) {
+    if (fftBins[i] > maxVolume && fftBins[i] < 0) {
+      maxVolume = fftBins[i];
+    }
+  }
+
+  ;
+  return maxVolume;
+}
+
+var audioContextType;
+
+if (typeof window !== 'undefined') {
+  audioContextType = window.AudioContext || window.webkitAudioContext;
+} // use a single audio context due to hardware limits
+
+
+var audioContext = null;
+
+module.exports = function (stream, options) {
+  var harker = new WildEmitter(); // make it not break in non-supported browsers
+
+  if (!audioContextType) return harker; //Config
+
+  var options = options || {},
+      smoothing = options.smoothing || 0.1,
+      interval = options.interval || 50,
+      threshold = options.threshold,
+      play = options.play,
+      history = options.history || 10,
+      running = true; // Ensure that just a single AudioContext is internally created
+
+  audioContext = options.audioContext || audioContext || new audioContextType();
+  var sourceNode, fftBins, analyser;
+  analyser = audioContext.createAnalyser();
+  analyser.fftSize = 512;
+  analyser.smoothingTimeConstant = smoothing;
+  fftBins = new Float32Array(analyser.frequencyBinCount);
+  if (stream.jquery) stream = stream[0];
+
+  if (stream instanceof HTMLAudioElement || stream instanceof HTMLVideoElement) {
+    //Audio Tag
+    sourceNode = audioContext.createMediaElementSource(stream);
+    if (typeof play === 'undefined') play = true;
+    threshold = threshold || -50;
+  } else {
+    //WebRTC Stream
+    sourceNode = audioContext.createMediaStreamSource(stream);
+    threshold = threshold || -50;
+  }
+
+  sourceNode.connect(analyser);
+  if (play) analyser.connect(audioContext.destination);
+  harker.speaking = false;
+
+  harker.suspend = function () {
+    return audioContext.suspend();
+  };
+
+  harker.resume = function () {
+    return audioContext.resume();
+  };
+
+  Object.defineProperty(harker, 'state', {
+    get: function get() {
+      return audioContext.state;
+    }
+  });
+
+  audioContext.onstatechange = function () {
+    harker.emit('state_change', audioContext.state);
+  };
+
+  harker.setThreshold = function (t) {
+    threshold = t;
+  };
+
+  harker.setInterval = function (i) {
+    interval = i;
+  };
+
+  harker.stop = function () {
+    running = false;
+    harker.emit('volume_change', -100, threshold);
+
+    if (harker.speaking) {
+      harker.speaking = false;
+      harker.emit('stopped_speaking');
+    }
+
+    analyser.disconnect();
+    sourceNode.disconnect();
+  };
+
+  harker.speakingHistory = [];
+
+  for (var i = 0; i < history; i++) {
+    harker.speakingHistory.push(0);
+  } // Poll the analyser node to determine if speaking
+  // and emit events if changed
+
+
+  var looper = function looper() {
+    setTimeout(function () {
+      //check if stop has been called
+      if (!running) {
+        return;
+      }
+
+      var currentVolume = getMaxVolume(analyser, fftBins);
+      harker.emit('volume_change', currentVolume, threshold);
+      var history = 0;
+
+      if (currentVolume > threshold && !harker.speaking) {
+        // trigger quickly, short history
+        for (var i = harker.speakingHistory.length - 3; i < harker.speakingHistory.length; i++) {
+          history += harker.speakingHistory[i];
+        }
+
+        if (history >= 2) {
+          harker.speaking = true;
+          harker.emit('speaking');
+        }
+      } else if (currentVolume < threshold && harker.speaking) {
+        for (var i = 0; i < harker.speakingHistory.length; i++) {
+          history += harker.speakingHistory[i];
+        }
+
+        if (history == 0) {
+          harker.speaking = false;
+          harker.emit('stopped_speaking');
+        }
+      }
+
+      harker.speakingHistory.shift();
+      harker.speakingHistory.push(0 + (currentVolume > threshold));
+      looper();
+    }, interval);
+  };
+
+  looper();
+  return harker;
+};
+
+},{"wildemitter":31}],10:[function(require,module,exports){
+"use strict";
+
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor;
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor;
+
+    var TempCtor = function TempCtor() {};
+
+    TempCtor.prototype = superCtor.prototype;
+    ctor.prototype = new TempCtor();
+    ctor.prototype.constructor = ctor;
+  };
+}
+
+},{}],11:[function(require,module,exports){
+"use strict";
+
+var methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",");
+var l = methods.length;
+
+var fn = function fn() {};
+
+var mockconsole = {};
+
+while (l--) {
+  mockconsole[methods[l]] = fn;
+}
+
+module.exports = mockconsole;
+
+},{}],12:[function(require,module,exports){
+"use strict";
+
+// shim for using process in browser
+var process = module.exports = {}; // cached from whatever global is present so that test runners that stub it
+// don't break things.  But we need to wrap it in a try catch in case it is
+// wrapped in strict mode code which doesn't define any globals.  It's inside a
+// function because try/catches deoptimize in certain engines.
+
+var cachedSetTimeout;
+var cachedClearTimeout;
+
+function defaultSetTimout() {
+  throw new Error('setTimeout has not been defined');
+}
+
+function defaultClearTimeout() {
+  throw new Error('clearTimeout has not been defined');
+}
+
+(function () {
+  try {
+    if (typeof setTimeout === 'function') {
+      cachedSetTimeout = setTimeout;
+    } else {
+      cachedSetTimeout = defaultSetTimout;
+    }
+  } catch (e) {
+    cachedSetTimeout = defaultSetTimout;
+  }
+
+  try {
+    if (typeof clearTimeout === 'function') {
+      cachedClearTimeout = clearTimeout;
+    } else {
+      cachedClearTimeout = defaultClearTimeout;
+    }
+  } catch (e) {
+    cachedClearTimeout = defaultClearTimeout;
+  }
+})();
+
+function runTimeout(fun) {
+  if (cachedSetTimeout === setTimeout) {
+    //normal enviroments in sane situations
+    return setTimeout(fun, 0);
+  } // if setTimeout wasn't available but was latter defined
+
+
+  if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+    cachedSetTimeout = setTimeout;
+    return setTimeout(fun, 0);
+  }
+
+  try {
+    // when when somebody has screwed with setTimeout but no I.E. maddness
+    return cachedSetTimeout(fun, 0);
+  } catch (e) {
+    try {
+      // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+      return cachedSetTimeout.call(null, fun, 0);
+    } catch (e) {
+      // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+      return cachedSetTimeout.call(this, fun, 0);
+    }
+  }
+}
+
+function runClearTimeout(marker) {
+  if (cachedClearTimeout === clearTimeout) {
+    //normal enviroments in sane situations
+    return clearTimeout(marker);
+  } // if clearTimeout wasn't available but was latter defined
+
+
+  if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+    cachedClearTimeout = clearTimeout;
+    return clearTimeout(marker);
+  }
+
+  try {
+    // when when somebody has screwed with setTimeout but no I.E. maddness
+    return cachedClearTimeout(marker);
+  } catch (e) {
+    try {
+      // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+      return cachedClearTimeout.call(null, marker);
+    } catch (e) {
+      // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+      // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+      return cachedClearTimeout.call(this, marker);
+    }
+  }
+}
+
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
+
+function cleanUpNextTick() {
+  if (!draining || !currentQueue) {
+    return;
+  }
+
+  draining = false;
+
+  if (currentQueue.length) {
+    queue = currentQueue.concat(queue);
+  } else {
+    queueIndex = -1;
+  }
+
+  if (queue.length) {
+    drainQueue();
+  }
+}
+
+function drainQueue() {
+  if (draining) {
+    return;
+  }
+
+  var timeout = runTimeout(cleanUpNextTick);
+  draining = true;
+  var len = queue.length;
+
+  while (len) {
+    currentQueue = queue;
+    queue = [];
+
+    while (++queueIndex < len) {
+      if (currentQueue) {
+        currentQueue[queueIndex].run();
+      }
+    }
+
+    queueIndex = -1;
+    len = queue.length;
+  }
+
+  currentQueue = null;
+  draining = false;
+  runClearTimeout(timeout);
+}
+
+process.nextTick = function (fun) {
+  var args = new Array(arguments.length - 1);
+
+  if (arguments.length > 1) {
+    for (var i = 1; i < arguments.length; i++) {
+      args[i - 1] = arguments[i];
+    }
+  }
+
+  queue.push(new Item(fun, args));
+
+  if (queue.length === 1 && !draining) {
+    runTimeout(drainQueue);
+  }
+}; // v8 likes predictible objects
+
+
+function Item(fun, array) {
+  this.fun = fun;
+  this.array = array;
+}
+
+Item.prototype.run = function () {
+  this.fun.apply(null, this.array);
+};
+
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+process.prependListener = noop;
+process.prependOnceListener = noop;
+
+process.listeners = function (name) {
+  return [];
+};
+
+process.binding = function (name) {
+  throw new Error('process.binding is not supported');
+};
+
+process.cwd = function () {
+  return '/';
+};
+
+process.chdir = function (dir) {
+  throw new Error('process.chdir is not supported');
+};
+
+process.umask = function () {
+  return 0;
+};
+
+},{}],13:[function(require,module,exports){
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+var SDPUtils = require('sdp');
+
+function fixStatsType(stat) {
+  return {
+    inboundrtp: 'inbound-rtp',
+    outboundrtp: 'outbound-rtp',
+    candidatepair: 'candidate-pair',
+    localcandidate: 'local-candidate',
+    remotecandidate: 'remote-candidate'
+  }[stat.type] || stat.type;
+}
+
+function writeMediaSection(transceiver, caps, type, stream, dtlsRole) {
+  var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps); // Map ICE parameters (ufrag, pwd) to SDP.
+
+  sdp += SDPUtils.writeIceParameters(transceiver.iceGatherer.getLocalParameters()); // Map DTLS parameters to SDP.
+
+  sdp += SDPUtils.writeDtlsParameters(transceiver.dtlsTransport.getLocalParameters(), type === 'offer' ? 'actpass' : dtlsRole || 'active');
+  sdp += 'a=mid:' + transceiver.mid + '\r\n';
+
+  if (transceiver.rtpSender && transceiver.rtpReceiver) {
+    sdp += 'a=sendrecv\r\n';
+  } else if (transceiver.rtpSender) {
+    sdp += 'a=sendonly\r\n';
+  } else if (transceiver.rtpReceiver) {
+    sdp += 'a=recvonly\r\n';
+  } else {
+    sdp += 'a=inactive\r\n';
+  }
+
+  if (transceiver.rtpSender) {
+    var trackId = transceiver.rtpSender._initialTrackId || transceiver.rtpSender.track.id;
+    transceiver.rtpSender._initialTrackId = trackId; // spec.
+
+    var msid = 'msid:' + (stream ? stream.id : '-') + ' ' + trackId + '\r\n';
+    sdp += 'a=' + msid; // for Chrome. Legacy should no longer be required.
+
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc + ' ' + msid; // RTX
+
+    if (transceiver.sendEncodingParameters[0].rtx) {
+      sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc + ' ' + msid;
+      sdp += 'a=ssrc-group:FID ' + transceiver.sendEncodingParameters[0].ssrc + ' ' + transceiver.sendEncodingParameters[0].rtx.ssrc + '\r\n';
+    }
+  } // FIXME: this should be written by writeRtpDescription.
+
+
+  sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc + ' cname:' + SDPUtils.localCName + '\r\n';
+
+  if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc + ' cname:' + SDPUtils.localCName + '\r\n';
+  }
+
+  return sdp;
+} // Edge does not like
+// 1) stun: filtered after 14393 unless ?transport=udp is present
+// 2) turn: that does not have all of turn:host:port?transport=udp
+// 3) turn: with ipv6 addresses
+// 4) turn: occurring muliple times
+
+
+function filterIceServers(iceServers, edgeVersion) {
+  var hasTurn = false;
+  iceServers = JSON.parse(JSON.stringify(iceServers));
+  return iceServers.filter(function (server) {
+    if (server && (server.urls || server.url)) {
+      var urls = server.urls || server.url;
+
+      if (server.url && !server.urls) {
+        console.warn('RTCIceServer.url is deprecated! Use urls instead.');
+      }
+
+      var isString = typeof urls === 'string';
+
+      if (isString) {
+        urls = [urls];
+      }
+
+      urls = urls.filter(function (url) {
+        var validTurn = url.indexOf('turn:') === 0 && url.indexOf('transport=udp') !== -1 && url.indexOf('turn:[') === -1 && !hasTurn;
+
+        if (validTurn) {
+          hasTurn = true;
+          return true;
+        }
+
+        return url.indexOf('stun:') === 0 && edgeVersion >= 14393 && url.indexOf('?transport=udp') === -1;
+      });
+      delete server.url;
+      server.urls = isString ? urls[0] : urls;
+      return !!urls.length;
+    }
+  });
+} // Determines the intersection of local and remote capabilities.
+
+
+function getCommonCapabilities(localCapabilities, remoteCapabilities) {
+  var commonCapabilities = {
+    codecs: [],
+    headerExtensions: [],
+    fecMechanisms: []
+  };
+
+  var findCodecByPayloadType = function findCodecByPayloadType(pt, codecs) {
+    pt = parseInt(pt, 10);
+
+    for (var i = 0; i < codecs.length; i++) {
+      if (codecs[i].payloadType === pt || codecs[i].preferredPayloadType === pt) {
+        return codecs[i];
+      }
+    }
+  };
+
+  var rtxCapabilityMatches = function rtxCapabilityMatches(lRtx, rRtx, lCodecs, rCodecs) {
+    var lCodec = findCodecByPayloadType(lRtx.parameters.apt, lCodecs);
+    var rCodec = findCodecByPayloadType(rRtx.parameters.apt, rCodecs);
+    return lCodec && rCodec && lCodec.name.toLowerCase() === rCodec.name.toLowerCase();
+  };
+
+  localCapabilities.codecs.forEach(function (lCodec) {
+    for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
+      var rCodec = remoteCapabilities.codecs[i];
+
+      if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() && lCodec.clockRate === rCodec.clockRate) {
+        if (lCodec.name.toLowerCase() === 'rtx' && lCodec.parameters && rCodec.parameters.apt) {
+          // for RTX we need to find the local rtx that has a apt
+          // which points to the same local codec as the remote one.
+          if (!rtxCapabilityMatches(lCodec, rCodec, localCapabilities.codecs, remoteCapabilities.codecs)) {
+            continue;
+          }
+        }
+
+        rCodec = JSON.parse(JSON.stringify(rCodec)); // deepcopy
+        // number of channels is the highest common number of channels
+
+        rCodec.numChannels = Math.min(lCodec.numChannels, rCodec.numChannels); // push rCodec so we reply with offerer payload type
+
+        commonCapabilities.codecs.push(rCodec); // determine common feedback mechanisms
+
+        rCodec.rtcpFeedback = rCodec.rtcpFeedback.filter(function (fb) {
+          for (var j = 0; j < lCodec.rtcpFeedback.length; j++) {
+            if (lCodec.rtcpFeedback[j].type === fb.type && lCodec.rtcpFeedback[j].parameter === fb.parameter) {
+              return true;
+            }
+          }
+
+          return false;
+        }); // FIXME: also need to determine .parameters
+        //  see https://github.com/openpeer/ortc/issues/569
+
+        break;
+      }
+    }
+  });
+  localCapabilities.headerExtensions.forEach(function (lHeaderExtension) {
+    for (var i = 0; i < remoteCapabilities.headerExtensions.length; i++) {
+      var rHeaderExtension = remoteCapabilities.headerExtensions[i];
+
+      if (lHeaderExtension.uri === rHeaderExtension.uri) {
+        commonCapabilities.headerExtensions.push(rHeaderExtension);
+        break;
+      }
+    }
+  }); // FIXME: fecMechanisms
+
+  return commonCapabilities;
+} // is action=setLocalDescription with type allowed in signalingState
+
+
+function isActionAllowedInSignalingState(action, type, signalingState) {
+  return {
+    offer: {
+      setLocalDescription: ['stable', 'have-local-offer'],
+      setRemoteDescription: ['stable', 'have-remote-offer']
+    },
+    answer: {
+      setLocalDescription: ['have-remote-offer', 'have-local-pranswer'],
+      setRemoteDescription: ['have-local-offer', 'have-remote-pranswer']
+    }
+  }[type][action].indexOf(signalingState) !== -1;
+}
+
+function maybeAddCandidate(iceTransport, candidate) {
+  // Edge's internal representation adds some fields therefore
+  // not all fieldѕ are taken into account.
+  var alreadyAdded = iceTransport.getRemoteCandidates().find(function (remoteCandidate) {
+    return candidate.foundation === remoteCandidate.foundation && candidate.ip === remoteCandidate.ip && candidate.port === remoteCandidate.port && candidate.priority === remoteCandidate.priority && candidate.protocol === remoteCandidate.protocol && candidate.type === remoteCandidate.type;
+  });
+
+  if (!alreadyAdded) {
+    iceTransport.addRemoteCandidate(candidate);
+  }
+
+  return !alreadyAdded;
+}
+
+function makeError(name, description) {
+  var e = new Error(description);
+  e.name = name; // legacy error codes from https://heycam.github.io/webidl/#idl-DOMException-error-names
+
+  e.code = {
+    NotSupportedError: 9,
+    InvalidStateError: 11,
+    InvalidAccessError: 15,
+    TypeError: undefined,
+    OperationError: undefined
+  }[name];
+  return e;
+}
+
+module.exports = function (window, edgeVersion) {
+  // https://w3c.github.io/mediacapture-main/#mediastream
+  // Helper function to add the track to the stream and
+  // dispatch the event ourselves.
+  function addTrackToStreamAndFireEvent(track, stream) {
+    stream.addTrack(track);
+    stream.dispatchEvent(new window.MediaStreamTrackEvent('addtrack', {
+      track: track
+    }));
+  }
+
+  function removeTrackFromStreamAndFireEvent(track, stream) {
+    stream.removeTrack(track);
+    stream.dispatchEvent(new window.MediaStreamTrackEvent('removetrack', {
+      track: track
+    }));
+  }
+
+  function fireAddTrack(pc, track, receiver, streams) {
+    var trackEvent = new Event('track');
+    trackEvent.track = track;
+    trackEvent.receiver = receiver;
+    trackEvent.transceiver = {
+      receiver: receiver
+    };
+    trackEvent.streams = streams;
+    window.setTimeout(function () {
+      pc._dispatchEvent('track', trackEvent);
+    });
+  }
+
+  var RTCPeerConnection = function RTCPeerConnection(config) {
+    var pc = this;
+
+    var _eventTarget = document.createDocumentFragment();
+
+    ['addEventListener', 'removeEventListener', 'dispatchEvent'].forEach(function (method) {
+      pc[method] = _eventTarget[method].bind(_eventTarget);
+    });
+    this.canTrickleIceCandidates = null;
+    this.needNegotiation = false;
+    this.localStreams = [];
+    this.remoteStreams = [];
+    this._localDescription = null;
+    this._remoteDescription = null;
+    this.signalingState = 'stable';
+    this.iceConnectionState = 'new';
+    this.connectionState = 'new';
+    this.iceGatheringState = 'new';
+    config = JSON.parse(JSON.stringify(config || {}));
+    this.usingBundle = config.bundlePolicy === 'max-bundle';
+
+    if (config.rtcpMuxPolicy === 'negotiate') {
+      throw makeError('NotSupportedError', 'rtcpMuxPolicy \'negotiate\' is not supported');
+    } else if (!config.rtcpMuxPolicy) {
+      config.rtcpMuxPolicy = 'require';
+    }
+
+    switch (config.iceTransportPolicy) {
+      case 'all':
+      case 'relay':
+        break;
+
+      default:
+        config.iceTransportPolicy = 'all';
+        break;
+    }
+
+    switch (config.bundlePolicy) {
+      case 'balanced':
+      case 'max-compat':
+      case 'max-bundle':
+        break;
+
+      default:
+        config.bundlePolicy = 'balanced';
+        break;
+    }
+
+    config.iceServers = filterIceServers(config.iceServers || [], edgeVersion);
+    this._iceGatherers = [];
+
+    if (config.iceCandidatePoolSize) {
+      for (var i = config.iceCandidatePoolSize; i > 0; i--) {
+        this._iceGatherers.push(new window.RTCIceGatherer({
+          iceServers: config.iceServers,
+          gatherPolicy: config.iceTransportPolicy
+        }));
+      }
+    } else {
+      config.iceCandidatePoolSize = 0;
+    }
+
+    this._config = config; // per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
+    // everything that is needed to describe a SDP m-line.
+
+    this.transceivers = [];
+    this._sdpSessionId = SDPUtils.generateSessionId();
+    this._sdpSessionVersion = 0;
+    this._dtlsRole = undefined; // role for a=setup to use in answers.
+
+    this._isClosed = false;
+  };
+
+  Object.defineProperty(RTCPeerConnection.prototype, 'localDescription', {
+    configurable: true,
+    get: function get() {
+      return this._localDescription;
+    }
+  });
+  Object.defineProperty(RTCPeerConnection.prototype, 'remoteDescription', {
+    configurable: true,
+    get: function get() {
+      return this._remoteDescription;
+    }
+  }); // set up event handlers on prototype
+
+  RTCPeerConnection.prototype.onicecandidate = null;
+  RTCPeerConnection.prototype.onaddstream = null;
+  RTCPeerConnection.prototype.ontrack = null;
+  RTCPeerConnection.prototype.onremovestream = null;
+  RTCPeerConnection.prototype.onsignalingstatechange = null;
+  RTCPeerConnection.prototype.oniceconnectionstatechange = null;
+  RTCPeerConnection.prototype.onconnectionstatechange = null;
+  RTCPeerConnection.prototype.onicegatheringstatechange = null;
+  RTCPeerConnection.prototype.onnegotiationneeded = null;
+  RTCPeerConnection.prototype.ondatachannel = null;
+
+  RTCPeerConnection.prototype._dispatchEvent = function (name, event) {
+    if (this._isClosed) {
+      return;
+    }
+
+    this.dispatchEvent(event);
+
+    if (typeof this['on' + name] === 'function') {
+      this['on' + name](event);
+    }
+  };
+
+  RTCPeerConnection.prototype._emitGatheringStateChange = function () {
+    var event = new Event('icegatheringstatechange');
+
+    this._dispatchEvent('icegatheringstatechange', event);
+  };
+
+  RTCPeerConnection.prototype.getConfiguration = function () {
+    return this._config;
+  };
+
+  RTCPeerConnection.prototype.getLocalStreams = function () {
+    return this.localStreams;
+  };
+
+  RTCPeerConnection.prototype.getRemoteStreams = function () {
+    return this.remoteStreams;
+  }; // internal helper to create a transceiver object.
+  // (which is not yet the same as the WebRTC 1.0 transceiver)
+
+
+  RTCPeerConnection.prototype._createTransceiver = function (kind, doNotAdd) {
+    var hasBundleTransport = this.transceivers.length > 0;
+    var transceiver = {
+      track: null,
+      iceGatherer: null,
+      iceTransport: null,
+      dtlsTransport: null,
+      localCapabilities: null,
+      remoteCapabilities: null,
+      rtpSender: null,
+      rtpReceiver: null,
+      kind: kind,
+      mid: null,
+      sendEncodingParameters: null,
+      recvEncodingParameters: null,
+      stream: null,
+      associatedRemoteMediaStreams: [],
+      wantReceive: true
+    };
+
+    if (this.usingBundle && hasBundleTransport) {
+      transceiver.iceTransport = this.transceivers[0].iceTransport;
+      transceiver.dtlsTransport = this.transceivers[0].dtlsTransport;
+    } else {
+      var transports = this._createIceAndDtlsTransports();
+
+      transceiver.iceTransport = transports.iceTransport;
+      transceiver.dtlsTransport = transports.dtlsTransport;
+    }
+
+    if (!doNotAdd) {
+      this.transceivers.push(transceiver);
+    }
+
+    return transceiver;
+  };
+
+  RTCPeerConnection.prototype.addTrack = function (track, stream) {
+    if (this._isClosed) {
+      throw makeError('InvalidStateError', 'Attempted to call addTrack on a closed peerconnection.');
+    }
+
+    var alreadyExists = this.transceivers.find(function (s) {
+      return s.track === track;
+    });
+
+    if (alreadyExists) {
+      throw makeError('InvalidAccessError', 'Track already exists.');
+    }
+
+    var transceiver;
+
+    for (var i = 0; i < this.transceivers.length; i++) {
+      if (!this.transceivers[i].track && this.transceivers[i].kind === track.kind) {
+        transceiver = this.transceivers[i];
+      }
+    }
+
+    if (!transceiver) {
+      transceiver = this._createTransceiver(track.kind);
+    }
+
+    this._maybeFireNegotiationNeeded();
+
+    if (this.localStreams.indexOf(stream) === -1) {
+      this.localStreams.push(stream);
+    }
+
+    transceiver.track = track;
+    transceiver.stream = stream;
+    transceiver.rtpSender = new window.RTCRtpSender(track, transceiver.dtlsTransport);
+    return transceiver.rtpSender;
+  };
+
+  RTCPeerConnection.prototype.addStream = function (stream) {
+    var pc = this;
+
+    if (edgeVersion >= 15025) {
+      stream.getTracks().forEach(function (track) {
+        pc.addTrack(track, stream);
+      });
+    } else {
+      // Clone is necessary for local demos mostly, attaching directly
+      // to two different senders does not work (build 10547).
+      // Fixed in 15025 (or earlier)
+      var clonedStream = stream.clone();
+      stream.getTracks().forEach(function (track, idx) {
+        var clonedTrack = clonedStream.getTracks()[idx];
+        track.addEventListener('enabled', function (event) {
+          clonedTrack.enabled = event.enabled;
+        });
+      });
+      clonedStream.getTracks().forEach(function (track) {
+        pc.addTrack(track, clonedStream);
+      });
+    }
+  };
+
+  RTCPeerConnection.prototype.removeTrack = function (sender) {
+    if (this._isClosed) {
+      throw makeError('InvalidStateError', 'Attempted to call removeTrack on a closed peerconnection.');
+    }
+
+    if (!(sender instanceof window.RTCRtpSender)) {
+      throw new TypeError('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.');
+    }
+
+    var transceiver = this.transceivers.find(function (t) {
+      return t.rtpSender === sender;
+    });
+
+    if (!transceiver) {
+      throw makeError('InvalidAccessError', 'Sender was not created by this connection.');
+    }
+
+    var stream = transceiver.stream;
+    transceiver.rtpSender.stop();
+    transceiver.rtpSender = null;
+    transceiver.track = null;
+    transceiver.stream = null; // remove the stream from the set of local streams
+
+    var localStreams = this.transceivers.map(function (t) {
+      return t.stream;
+    });
+
+    if (localStreams.indexOf(stream) === -1 && this.localStreams.indexOf(stream) > -1) {
+      this.localStreams.splice(this.localStreams.indexOf(stream), 1);
+    }
+
+    this._maybeFireNegotiationNeeded();
+  };
+
+  RTCPeerConnection.prototype.removeStream = function (stream) {
+    var pc = this;
+    stream.getTracks().forEach(function (track) {
+      var sender = pc.getSenders().find(function (s) {
+        return s.track === track;
+      });
+
+      if (sender) {
+        pc.removeTrack(sender);
+      }
+    });
+  };
+
+  RTCPeerConnection.prototype.getSenders = function () {
+    return this.transceivers.filter(function (transceiver) {
+      return !!transceiver.rtpSender;
+    }).map(function (transceiver) {
+      return transceiver.rtpSender;
+    });
+  };
+
+  RTCPeerConnection.prototype.getReceivers = function () {
+    return this.transceivers.filter(function (transceiver) {
+      return !!transceiver.rtpReceiver;
+    }).map(function (transceiver) {
+      return transceiver.rtpReceiver;
+    });
+  };
+
+  RTCPeerConnection.prototype._createIceGatherer = function (sdpMLineIndex, usingBundle) {
+    var pc = this;
+
+    if (usingBundle && sdpMLineIndex > 0) {
+      return this.transceivers[0].iceGatherer;
+    } else if (this._iceGatherers.length) {
+      return this._iceGatherers.shift();
+    }
+
+    var iceGatherer = new window.RTCIceGatherer({
+      iceServers: this._config.iceServers,
+      gatherPolicy: this._config.iceTransportPolicy
+    });
+    Object.defineProperty(iceGatherer, 'state', {
+      value: 'new',
+      writable: true
+    });
+    this.transceivers[sdpMLineIndex].bufferedCandidateEvents = [];
+
+    this.transceivers[sdpMLineIndex].bufferCandidates = function (event) {
+      var end = !event.candidate || Object.keys(event.candidate).length === 0; // polyfill since RTCIceGatherer.state is not implemented in
+      // Edge 10547 yet.
+
+      iceGatherer.state = end ? 'completed' : 'gathering';
+
+      if (pc.transceivers[sdpMLineIndex].bufferedCandidateEvents !== null) {
+        pc.transceivers[sdpMLineIndex].bufferedCandidateEvents.push(event);
+      }
+    };
+
+    iceGatherer.addEventListener('localcandidate', this.transceivers[sdpMLineIndex].bufferCandidates);
+    return iceGatherer;
+  }; // start gathering from an RTCIceGatherer.
+
+
+  RTCPeerConnection.prototype._gather = function (mid, sdpMLineIndex) {
+    var pc = this;
+    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
+
+    if (iceGatherer.onlocalcandidate) {
+      return;
+    }
+
+    var bufferedCandidateEvents = this.transceivers[sdpMLineIndex].bufferedCandidateEvents;
+    this.transceivers[sdpMLineIndex].bufferedCandidateEvents = null;
+    iceGatherer.removeEventListener('localcandidate', this.transceivers[sdpMLineIndex].bufferCandidates);
+
+    iceGatherer.onlocalcandidate = function (evt) {
+      if (pc.usingBundle && sdpMLineIndex > 0) {
+        // if we know that we use bundle we can drop candidates with
+        // ѕdpMLineIndex > 0. If we don't do this then our state gets
+        // confused since we dispose the extra ice gatherer.
+        return;
+      }
+
+      var event = new Event('icecandidate');
+      event.candidate = {
+        sdpMid: mid,
+        sdpMLineIndex: sdpMLineIndex
+      };
+      var cand = evt.candidate; // Edge emits an empty object for RTCIceCandidateComplete‥
+
+      var end = !cand || Object.keys(cand).length === 0;
+
+      if (end) {
+        // polyfill since RTCIceGatherer.state is not implemented in
+        // Edge 10547 yet.
+        if (iceGatherer.state === 'new' || iceGatherer.state === 'gathering') {
+          iceGatherer.state = 'completed';
+        }
+      } else {
+        if (iceGatherer.state === 'new') {
+          iceGatherer.state = 'gathering';
+        } // RTCIceCandidate doesn't have a component, needs to be added
+
+
+        cand.component = 1; // also the usernameFragment. TODO: update SDP to take both variants.
+
+        cand.ufrag = iceGatherer.getLocalParameters().usernameFragment;
+        var serializedCandidate = SDPUtils.writeCandidate(cand);
+        event.candidate = Object.assign(event.candidate, SDPUtils.parseCandidate(serializedCandidate));
+        event.candidate.candidate = serializedCandidate;
+
+        event.candidate.toJSON = function () {
+          return {
+            candidate: event.candidate.candidate,
+            sdpMid: event.candidate.sdpMid,
+            sdpMLineIndex: event.candidate.sdpMLineIndex,
+            usernameFragment: event.candidate.usernameFragment
+          };
+        };
+      } // update local description.
+
+
+      var sections = SDPUtils.getMediaSections(pc._localDescription.sdp);
+
+      if (!end) {
+        sections[event.candidate.sdpMLineIndex] += 'a=' + event.candidate.candidate + '\r\n';
+      } else {
+        sections[event.candidate.sdpMLineIndex] += 'a=end-of-candidates\r\n';
+      }
+
+      pc._localDescription.sdp = SDPUtils.getDescription(pc._localDescription.sdp) + sections.join('');
+      var complete = pc.transceivers.every(function (transceiver) {
+        return transceiver.iceGatherer && transceiver.iceGatherer.state === 'completed';
+      });
+
+      if (pc.iceGatheringState !== 'gathering') {
+        pc.iceGatheringState = 'gathering';
+
+        pc._emitGatheringStateChange();
+      } // Emit candidate. Also emit null candidate when all gatherers are
+      // complete.
+
+
+      if (!end) {
+        pc._dispatchEvent('icecandidate', event);
+      }
+
+      if (complete) {
+        pc._dispatchEvent('icecandidate', new Event('icecandidate'));
+
+        pc.iceGatheringState = 'complete';
+
+        pc._emitGatheringStateChange();
+      }
+    }; // emit already gathered candidates.
+
+
+    window.setTimeout(function () {
+      bufferedCandidateEvents.forEach(function (e) {
+        iceGatherer.onlocalcandidate(e);
+      });
+    }, 0);
+  }; // Create ICE transport and DTLS transport.
+
+
+  RTCPeerConnection.prototype._createIceAndDtlsTransports = function () {
+    var pc = this;
+    var iceTransport = new window.RTCIceTransport(null);
+
+    iceTransport.onicestatechange = function () {
+      pc._updateIceConnectionState();
+
+      pc._updateConnectionState();
+    };
+
+    var dtlsTransport = new window.RTCDtlsTransport(iceTransport);
+
+    dtlsTransport.ondtlsstatechange = function () {
+      pc._updateConnectionState();
+    };
+
+    dtlsTransport.onerror = function () {
+      // onerror does not set state to failed by itself.
+      Object.defineProperty(dtlsTransport, 'state', {
+        value: 'failed',
+        writable: true
+      });
+
+      pc._updateConnectionState();
+    };
+
+    return {
+      iceTransport: iceTransport,
+      dtlsTransport: dtlsTransport
+    };
+  }; // Destroy ICE gatherer, ICE transport and DTLS transport.
+  // Without triggering the callbacks.
+
+
+  RTCPeerConnection.prototype._disposeIceAndDtlsTransports = function (sdpMLineIndex) {
+    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
+
+    if (iceGatherer) {
+      delete iceGatherer.onlocalcandidate;
+      delete this.transceivers[sdpMLineIndex].iceGatherer;
+    }
+
+    var iceTransport = this.transceivers[sdpMLineIndex].iceTransport;
+
+    if (iceTransport) {
+      delete iceTransport.onicestatechange;
+      delete this.transceivers[sdpMLineIndex].iceTransport;
+    }
+
+    var dtlsTransport = this.transceivers[sdpMLineIndex].dtlsTransport;
+
+    if (dtlsTransport) {
+      delete dtlsTransport.ondtlsstatechange;
+      delete dtlsTransport.onerror;
+      delete this.transceivers[sdpMLineIndex].dtlsTransport;
+    }
+  }; // Start the RTP Sender and Receiver for a transceiver.
+
+
+  RTCPeerConnection.prototype._transceive = function (transceiver, send, recv) {
+    var params = getCommonCapabilities(transceiver.localCapabilities, transceiver.remoteCapabilities);
+
+    if (send && transceiver.rtpSender) {
+      params.encodings = transceiver.sendEncodingParameters;
+      params.rtcp = {
+        cname: SDPUtils.localCName,
+        compound: transceiver.rtcpParameters.compound
+      };
+
+      if (transceiver.recvEncodingParameters.length) {
+        params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
+      }
+
+      transceiver.rtpSender.send(params);
+    }
+
+    if (recv && transceiver.rtpReceiver && params.codecs.length > 0) {
+      // remove RTX field in Edge 14942
+      if (transceiver.kind === 'video' && transceiver.recvEncodingParameters && edgeVersion < 15019) {
+        transceiver.recvEncodingParameters.forEach(function (p) {
+          delete p.rtx;
+        });
+      }
+
+      if (transceiver.recvEncodingParameters.length) {
+        params.encodings = transceiver.recvEncodingParameters;
+      } else {
+        params.encodings = [{}];
+      }
+
+      params.rtcp = {
+        compound: transceiver.rtcpParameters.compound
+      };
+
+      if (transceiver.rtcpParameters.cname) {
+        params.rtcp.cname = transceiver.rtcpParameters.cname;
+      }
+
+      if (transceiver.sendEncodingParameters.length) {
+        params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
+      }
+
+      transceiver.rtpReceiver.receive(params);
+    }
+  };
+
+  RTCPeerConnection.prototype.setLocalDescription = function (description) {
+    var pc = this; // Note: pranswer is not supported.
+
+    if (['offer', 'answer'].indexOf(description.type) === -1) {
+      return Promise.reject(makeError('TypeError', 'Unsupported type "' + description.type + '"'));
+    }
+
+    if (!isActionAllowedInSignalingState('setLocalDescription', description.type, pc.signalingState) || pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError', 'Can not set local ' + description.type + ' in state ' + pc.signalingState));
+    }
+
+    var sections;
+    var sessionpart;
+
+    if (description.type === 'offer') {
+      // VERY limited support for SDP munging. Limited to:
+      // * changing the order of codecs
+      sections = SDPUtils.splitSections(description.sdp);
+      sessionpart = sections.shift();
+      sections.forEach(function (mediaSection, sdpMLineIndex) {
+        var caps = SDPUtils.parseRtpParameters(mediaSection);
+        pc.transceivers[sdpMLineIndex].localCapabilities = caps;
+      });
+      pc.transceivers.forEach(function (transceiver, sdpMLineIndex) {
+        pc._gather(transceiver.mid, sdpMLineIndex);
+      });
+    } else if (description.type === 'answer') {
+      sections = SDPUtils.splitSections(pc._remoteDescription.sdp);
+      sessionpart = sections.shift();
+      var isIceLite = SDPUtils.matchPrefix(sessionpart, 'a=ice-lite').length > 0;
+      sections.forEach(function (mediaSection, sdpMLineIndex) {
+        var transceiver = pc.transceivers[sdpMLineIndex];
+        var iceGatherer = transceiver.iceGatherer;
+        var iceTransport = transceiver.iceTransport;
+        var dtlsTransport = transceiver.dtlsTransport;
+        var localCapabilities = transceiver.localCapabilities;
+        var remoteCapabilities = transceiver.remoteCapabilities; // treat bundle-only as not-rejected.
+
+        var rejected = SDPUtils.isRejected(mediaSection) && SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
+
+        if (!rejected && !transceiver.rejected) {
+          var remoteIceParameters = SDPUtils.getIceParameters(mediaSection, sessionpart);
+          var remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection, sessionpart);
+
+          if (isIceLite) {
+            remoteDtlsParameters.role = 'server';
+          }
+
+          if (!pc.usingBundle || sdpMLineIndex === 0) {
+            pc._gather(transceiver.mid, sdpMLineIndex);
+
+            if (iceTransport.state === 'new') {
+              iceTransport.start(iceGatherer, remoteIceParameters, isIceLite ? 'controlling' : 'controlled');
+            }
+
+            if (dtlsTransport.state === 'new') {
+              dtlsTransport.start(remoteDtlsParameters);
+            }
+          } // Calculate intersection of capabilities.
+
+
+          var params = getCommonCapabilities(localCapabilities, remoteCapabilities); // Start the RTCRtpSender. The RTCRtpReceiver for this
+          // transceiver has already been started in setRemoteDescription.
+
+          pc._transceive(transceiver, params.codecs.length > 0, false);
+        }
+      });
+    }
+
+    pc._localDescription = {
+      type: description.type,
+      sdp: description.sdp
+    };
+
+    if (description.type === 'offer') {
+      pc._updateSignalingState('have-local-offer');
+    } else {
+      pc._updateSignalingState('stable');
+    }
+
+    return Promise.resolve();
+  };
+
+  RTCPeerConnection.prototype.setRemoteDescription = function (description) {
+    var pc = this; // Note: pranswer is not supported.
+
+    if (['offer', 'answer'].indexOf(description.type) === -1) {
+      return Promise.reject(makeError('TypeError', 'Unsupported type "' + description.type + '"'));
+    }
+
+    if (!isActionAllowedInSignalingState('setRemoteDescription', description.type, pc.signalingState) || pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError', 'Can not set remote ' + description.type + ' in state ' + pc.signalingState));
+    }
+
+    var streams = {};
+    pc.remoteStreams.forEach(function (stream) {
+      streams[stream.id] = stream;
+    });
+    var receiverList = [];
+    var sections = SDPUtils.splitSections(description.sdp);
+    var sessionpart = sections.shift();
+    var isIceLite = SDPUtils.matchPrefix(sessionpart, 'a=ice-lite').length > 0;
+    var usingBundle = SDPUtils.matchPrefix(sessionpart, 'a=group:BUNDLE ').length > 0;
+    pc.usingBundle = usingBundle;
+    var iceOptions = SDPUtils.matchPrefix(sessionpart, 'a=ice-options:')[0];
+
+    if (iceOptions) {
+      pc.canTrickleIceCandidates = iceOptions.substr(14).split(' ').indexOf('trickle') >= 0;
+    } else {
+      pc.canTrickleIceCandidates = false;
+    }
+
+    sections.forEach(function (mediaSection, sdpMLineIndex) {
+      var lines = SDPUtils.splitLines(mediaSection);
+      var kind = SDPUtils.getKind(mediaSection); // treat bundle-only as not-rejected.
+
+      var rejected = SDPUtils.isRejected(mediaSection) && SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
+      var protocol = lines[0].substr(2).split(' ')[2];
+      var direction = SDPUtils.getDirection(mediaSection, sessionpart);
+      var remoteMsid = SDPUtils.parseMsid(mediaSection);
+      var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier(); // Reject datachannels which are not implemented yet.
+
+      if (rejected || kind === 'application' && (protocol === 'DTLS/SCTP' || protocol === 'UDP/DTLS/SCTP')) {
+        // TODO: this is dangerous in the case where a non-rejected m-line
+        //     becomes rejected.
+        pc.transceivers[sdpMLineIndex] = {
+          mid: mid,
+          kind: kind,
+          protocol: protocol,
+          rejected: true
+        };
+        return;
+      }
+
+      if (!rejected && pc.transceivers[sdpMLineIndex] && pc.transceivers[sdpMLineIndex].rejected) {
+        // recycle a rejected transceiver.
+        pc.transceivers[sdpMLineIndex] = pc._createTransceiver(kind, true);
+      }
+
+      var transceiver;
+      var iceGatherer;
+      var iceTransport;
+      var dtlsTransport;
+      var rtpReceiver;
+      var sendEncodingParameters;
+      var recvEncodingParameters;
+      var localCapabilities;
+      var track; // FIXME: ensure the mediaSection has rtcp-mux set.
+
+      var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
+      var remoteIceParameters;
+      var remoteDtlsParameters;
+
+      if (!rejected) {
+        remoteIceParameters = SDPUtils.getIceParameters(mediaSection, sessionpart);
+        remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection, sessionpart);
+        remoteDtlsParameters.role = 'client';
+      }
+
+      recvEncodingParameters = SDPUtils.parseRtpEncodingParameters(mediaSection);
+      var rtcpParameters = SDPUtils.parseRtcpParameters(mediaSection);
+      var isComplete = SDPUtils.matchPrefix(mediaSection, 'a=end-of-candidates', sessionpart).length > 0;
+      var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:').map(function (cand) {
+        return SDPUtils.parseCandidate(cand);
+      }).filter(function (cand) {
+        return cand.component === 1;
+      }); // Check if we can use BUNDLE and dispose transports.
+
+      if ((description.type === 'offer' || description.type === 'answer') && !rejected && usingBundle && sdpMLineIndex > 0 && pc.transceivers[sdpMLineIndex]) {
+        pc._disposeIceAndDtlsTransports(sdpMLineIndex);
+
+        pc.transceivers[sdpMLineIndex].iceGatherer = pc.transceivers[0].iceGatherer;
+        pc.transceivers[sdpMLineIndex].iceTransport = pc.transceivers[0].iceTransport;
+        pc.transceivers[sdpMLineIndex].dtlsTransport = pc.transceivers[0].dtlsTransport;
+
+        if (pc.transceivers[sdpMLineIndex].rtpSender) {
+          pc.transceivers[sdpMLineIndex].rtpSender.setTransport(pc.transceivers[0].dtlsTransport);
+        }
+
+        if (pc.transceivers[sdpMLineIndex].rtpReceiver) {
+          pc.transceivers[sdpMLineIndex].rtpReceiver.setTransport(pc.transceivers[0].dtlsTransport);
+        }
+      }
+
+      if (description.type === 'offer' && !rejected) {
+        transceiver = pc.transceivers[sdpMLineIndex] || pc._createTransceiver(kind);
+        transceiver.mid = mid;
+
+        if (!transceiver.iceGatherer) {
+          transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex, usingBundle);
+        }
+
+        if (cands.length && transceiver.iceTransport.state === 'new') {
+          if (isComplete && (!usingBundle || sdpMLineIndex === 0)) {
+            transceiver.iceTransport.setRemoteCandidates(cands);
+          } else {
+            cands.forEach(function (candidate) {
+              maybeAddCandidate(transceiver.iceTransport, candidate);
+            });
+          }
+        }
+
+        localCapabilities = window.RTCRtpReceiver.getCapabilities(kind); // filter RTX until additional stuff needed for RTX is implemented
+        // in adapter.js
+
+        if (edgeVersion < 15019) {
+          localCapabilities.codecs = localCapabilities.codecs.filter(function (codec) {
+            return codec.name !== 'rtx';
+          });
+        }
+
+        sendEncodingParameters = transceiver.sendEncodingParameters || [{
+          ssrc: (2 * sdpMLineIndex + 2) * 1001
+        }]; // TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
+
+        var isNewTrack = false;
+
+        if (direction === 'sendrecv' || direction === 'sendonly') {
+          isNewTrack = !transceiver.rtpReceiver;
+          rtpReceiver = transceiver.rtpReceiver || new window.RTCRtpReceiver(transceiver.dtlsTransport, kind);
+
+          if (isNewTrack) {
+            var stream;
+            track = rtpReceiver.track; // FIXME: does not work with Plan B.
+
+            if (remoteMsid && remoteMsid.stream === '-') {// no-op. a stream id of '-' means: no associated stream.
+            } else if (remoteMsid) {
+              if (!streams[remoteMsid.stream]) {
+                streams[remoteMsid.stream] = new window.MediaStream();
+                Object.defineProperty(streams[remoteMsid.stream], 'id', {
+                  get: function get() {
+                    return remoteMsid.stream;
+                  }
+                });
+              }
+
+              Object.defineProperty(track, 'id', {
+                get: function get() {
+                  return remoteMsid.track;
+                }
+              });
+              stream = streams[remoteMsid.stream];
+            } else {
+              if (!streams.default) {
+                streams.default = new window.MediaStream();
+              }
+
+              stream = streams.default;
+            }
+
+            if (stream) {
+              addTrackToStreamAndFireEvent(track, stream);
+              transceiver.associatedRemoteMediaStreams.push(stream);
+            }
+
+            receiverList.push([track, rtpReceiver, stream]);
+          }
+        } else if (transceiver.rtpReceiver && transceiver.rtpReceiver.track) {
+          transceiver.associatedRemoteMediaStreams.forEach(function (s) {
+            var nativeTrack = s.getTracks().find(function (t) {
+              return t.id === transceiver.rtpReceiver.track.id;
+            });
+
+            if (nativeTrack) {
+              removeTrackFromStreamAndFireEvent(nativeTrack, s);
+            }
+          });
+          transceiver.associatedRemoteMediaStreams = [];
+        }
+
+        transceiver.localCapabilities = localCapabilities;
+        transceiver.remoteCapabilities = remoteCapabilities;
+        transceiver.rtpReceiver = rtpReceiver;
+        transceiver.rtcpParameters = rtcpParameters;
+        transceiver.sendEncodingParameters = sendEncodingParameters;
+        transceiver.recvEncodingParameters = recvEncodingParameters; // Start the RTCRtpReceiver now. The RTPSender is started in
+        // setLocalDescription.
+
+        pc._transceive(pc.transceivers[sdpMLineIndex], false, isNewTrack);
+      } else if (description.type === 'answer' && !rejected) {
+        transceiver = pc.transceivers[sdpMLineIndex];
+        iceGatherer = transceiver.iceGatherer;
+        iceTransport = transceiver.iceTransport;
+        dtlsTransport = transceiver.dtlsTransport;
+        rtpReceiver = transceiver.rtpReceiver;
+        sendEncodingParameters = transceiver.sendEncodingParameters;
+        localCapabilities = transceiver.localCapabilities;
+        pc.transceivers[sdpMLineIndex].recvEncodingParameters = recvEncodingParameters;
+        pc.transceivers[sdpMLineIndex].remoteCapabilities = remoteCapabilities;
+        pc.transceivers[sdpMLineIndex].rtcpParameters = rtcpParameters;
+
+        if (cands.length && iceTransport.state === 'new') {
+          if ((isIceLite || isComplete) && (!usingBundle || sdpMLineIndex === 0)) {
+            iceTransport.setRemoteCandidates(cands);
+          } else {
+            cands.forEach(function (candidate) {
+              maybeAddCandidate(transceiver.iceTransport, candidate);
+            });
+          }
+        }
+
+        if (!usingBundle || sdpMLineIndex === 0) {
+          if (iceTransport.state === 'new') {
+            iceTransport.start(iceGatherer, remoteIceParameters, 'controlling');
+          }
+
+          if (dtlsTransport.state === 'new') {
+            dtlsTransport.start(remoteDtlsParameters);
+          }
+        } // If the offer contained RTX but the answer did not,
+        // remove RTX from sendEncodingParameters.
+
+
+        var commonCapabilities = getCommonCapabilities(transceiver.localCapabilities, transceiver.remoteCapabilities);
+        var hasRtx = commonCapabilities.codecs.filter(function (c) {
+          return c.name.toLowerCase() === 'rtx';
+        }).length;
+
+        if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
+          delete transceiver.sendEncodingParameters[0].rtx;
+        }
+
+        pc._transceive(transceiver, direction === 'sendrecv' || direction === 'recvonly', direction === 'sendrecv' || direction === 'sendonly'); // TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
+
+
+        if (rtpReceiver && (direction === 'sendrecv' || direction === 'sendonly')) {
+          track = rtpReceiver.track;
+
+          if (remoteMsid) {
+            if (!streams[remoteMsid.stream]) {
+              streams[remoteMsid.stream] = new window.MediaStream();
+            }
+
+            addTrackToStreamAndFireEvent(track, streams[remoteMsid.stream]);
+            receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]);
+          } else {
+            if (!streams.default) {
+              streams.default = new window.MediaStream();
+            }
+
+            addTrackToStreamAndFireEvent(track, streams.default);
+            receiverList.push([track, rtpReceiver, streams.default]);
+          }
+        } else {
+          // FIXME: actually the receiver should be created later.
+          delete transceiver.rtpReceiver;
+        }
+      }
+    });
+
+    if (pc._dtlsRole === undefined) {
+      pc._dtlsRole = description.type === 'offer' ? 'active' : 'passive';
+    }
+
+    pc._remoteDescription = {
+      type: description.type,
+      sdp: description.sdp
+    };
+
+    if (description.type === 'offer') {
+      pc._updateSignalingState('have-remote-offer');
+    } else {
+      pc._updateSignalingState('stable');
+    }
+
+    Object.keys(streams).forEach(function (sid) {
+      var stream = streams[sid];
+
+      if (stream.getTracks().length) {
+        if (pc.remoteStreams.indexOf(stream) === -1) {
+          pc.remoteStreams.push(stream);
+          var event = new Event('addstream');
+          event.stream = stream;
+          window.setTimeout(function () {
+            pc._dispatchEvent('addstream', event);
+          });
+        }
+
+        receiverList.forEach(function (item) {
+          var track = item[0];
+          var receiver = item[1];
+
+          if (stream.id !== item[2].id) {
+            return;
+          }
+
+          fireAddTrack(pc, track, receiver, [stream]);
+        });
+      }
+    });
+    receiverList.forEach(function (item) {
+      if (item[2]) {
+        return;
+      }
+
+      fireAddTrack(pc, item[0], item[1], []);
+    }); // check whether addIceCandidate({}) was called within four seconds after
+    // setRemoteDescription.
+
+    window.setTimeout(function () {
+      if (!(pc && pc.transceivers)) {
+        return;
+      }
+
+      pc.transceivers.forEach(function (transceiver) {
+        if (transceiver.iceTransport && transceiver.iceTransport.state === 'new' && transceiver.iceTransport.getRemoteCandidates().length > 0) {
+          console.warn('Timeout for addRemoteCandidate. Consider sending ' + 'an end-of-candidates notification');
+          transceiver.iceTransport.addRemoteCandidate({});
+        }
+      });
+    }, 4000);
+    return Promise.resolve();
+  };
+
+  RTCPeerConnection.prototype.close = function () {
+    this.transceivers.forEach(function (transceiver) {
+      /* not yet
+      if (transceiver.iceGatherer) {
+        transceiver.iceGatherer.close();
+      }
+      */
+      if (transceiver.iceTransport) {
+        transceiver.iceTransport.stop();
+      }
+
+      if (transceiver.dtlsTransport) {
+        transceiver.dtlsTransport.stop();
+      }
+
+      if (transceiver.rtpSender) {
+        transceiver.rtpSender.stop();
+      }
+
+      if (transceiver.rtpReceiver) {
+        transceiver.rtpReceiver.stop();
+      }
+    }); // FIXME: clean up tracks, local streams, remote streams, etc
+
+    this._isClosed = true;
+
+    this._updateSignalingState('closed');
+  }; // Update the signaling state.
+
+
+  RTCPeerConnection.prototype._updateSignalingState = function (newState) {
+    this.signalingState = newState;
+    var event = new Event('signalingstatechange');
+
+    this._dispatchEvent('signalingstatechange', event);
+  }; // Determine whether to fire the negotiationneeded event.
+
+
+  RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function () {
+    var pc = this;
+
+    if (this.signalingState !== 'stable' || this.needNegotiation === true) {
+      return;
+    }
+
+    this.needNegotiation = true;
+    window.setTimeout(function () {
+      if (pc.needNegotiation) {
+        pc.needNegotiation = false;
+        var event = new Event('negotiationneeded');
+
+        pc._dispatchEvent('negotiationneeded', event);
+      }
+    }, 0);
+  }; // Update the ice connection state.
+
+
+  RTCPeerConnection.prototype._updateIceConnectionState = function () {
+    var newState;
+    var states = {
+      'new': 0,
+      closed: 0,
+      checking: 0,
+      connected: 0,
+      completed: 0,
+      disconnected: 0,
+      failed: 0
+    };
+    this.transceivers.forEach(function (transceiver) {
+      if (transceiver.iceTransport && !transceiver.rejected) {
+        states[transceiver.iceTransport.state]++;
+      }
+    });
+    newState = 'new';
+
+    if (states.failed > 0) {
+      newState = 'failed';
+    } else if (states.checking > 0) {
+      newState = 'checking';
+    } else if (states.disconnected > 0) {
+      newState = 'disconnected';
+    } else if (states.new > 0) {
+      newState = 'new';
+    } else if (states.connected > 0) {
+      newState = 'connected';
+    } else if (states.completed > 0) {
+      newState = 'completed';
+    }
+
+    if (newState !== this.iceConnectionState) {
+      this.iceConnectionState = newState;
+      var event = new Event('iceconnectionstatechange');
+
+      this._dispatchEvent('iceconnectionstatechange', event);
+    }
+  }; // Update the connection state.
+
+
+  RTCPeerConnection.prototype._updateConnectionState = function () {
+    var newState;
+    var states = {
+      'new': 0,
+      closed: 0,
+      connecting: 0,
+      connected: 0,
+      completed: 0,
+      disconnected: 0,
+      failed: 0
+    };
+    this.transceivers.forEach(function (transceiver) {
+      if (transceiver.iceTransport && transceiver.dtlsTransport && !transceiver.rejected) {
+        states[transceiver.iceTransport.state]++;
+        states[transceiver.dtlsTransport.state]++;
+      }
+    }); // ICETransport.completed and connected are the same for this purpose.
+
+    states.connected += states.completed;
+    newState = 'new';
+
+    if (states.failed > 0) {
+      newState = 'failed';
+    } else if (states.connecting > 0) {
+      newState = 'connecting';
+    } else if (states.disconnected > 0) {
+      newState = 'disconnected';
+    } else if (states.new > 0) {
+      newState = 'new';
+    } else if (states.connected > 0) {
+      newState = 'connected';
+    }
+
+    if (newState !== this.connectionState) {
+      this.connectionState = newState;
+      var event = new Event('connectionstatechange');
+
+      this._dispatchEvent('connectionstatechange', event);
+    }
+  };
+
+  RTCPeerConnection.prototype.createOffer = function () {
+    var pc = this;
+
+    if (pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError', 'Can not call createOffer after close'));
+    }
+
+    var numAudioTracks = pc.transceivers.filter(function (t) {
+      return t.kind === 'audio';
+    }).length;
+    var numVideoTracks = pc.transceivers.filter(function (t) {
+      return t.kind === 'video';
+    }).length; // Determine number of audio and video tracks we need to send/recv.
+
+    var offerOptions = arguments[0];
+
+    if (offerOptions) {
+      // Reject Chrome legacy constraints.
+      if (offerOptions.mandatory || offerOptions.optional) {
+        throw new TypeError('Legacy mandatory/optional constraints not supported.');
+      }
+
+      if (offerOptions.offerToReceiveAudio !== undefined) {
+        if (offerOptions.offerToReceiveAudio === true) {
+          numAudioTracks = 1;
+        } else if (offerOptions.offerToReceiveAudio === false) {
+          numAudioTracks = 0;
+        } else {
+          numAudioTracks = offerOptions.offerToReceiveAudio;
+        }
+      }
+
+      if (offerOptions.offerToReceiveVideo !== undefined) {
+        if (offerOptions.offerToReceiveVideo === true) {
+          numVideoTracks = 1;
+        } else if (offerOptions.offerToReceiveVideo === false) {
+          numVideoTracks = 0;
+        } else {
+          numVideoTracks = offerOptions.offerToReceiveVideo;
+        }
+      }
+    }
+
+    pc.transceivers.forEach(function (transceiver) {
+      if (transceiver.kind === 'audio') {
+        numAudioTracks--;
+
+        if (numAudioTracks < 0) {
+          transceiver.wantReceive = false;
+        }
+      } else if (transceiver.kind === 'video') {
+        numVideoTracks--;
+
+        if (numVideoTracks < 0) {
+          transceiver.wantReceive = false;
+        }
+      }
+    }); // Create M-lines for recvonly streams.
+
+    while (numAudioTracks > 0 || numVideoTracks > 0) {
+      if (numAudioTracks > 0) {
+        pc._createTransceiver('audio');
+
+        numAudioTracks--;
+      }
+
+      if (numVideoTracks > 0) {
+        pc._createTransceiver('video');
+
+        numVideoTracks--;
+      }
+    }
+
+    var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId, pc._sdpSessionVersion++);
+    pc.transceivers.forEach(function (transceiver, sdpMLineIndex) {
+      // For each track, create an ice gatherer, ice transport,
+      // dtls transport, potentially rtpsender and rtpreceiver.
+      var track = transceiver.track;
+      var kind = transceiver.kind;
+      var mid = transceiver.mid || SDPUtils.generateIdentifier();
+      transceiver.mid = mid;
+
+      if (!transceiver.iceGatherer) {
+        transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex, pc.usingBundle);
+      }
+
+      var localCapabilities = window.RTCRtpSender.getCapabilities(kind); // filter RTX until additional stuff needed for RTX is implemented
+      // in adapter.js
+
+      if (edgeVersion < 15019) {
+        localCapabilities.codecs = localCapabilities.codecs.filter(function (codec) {
+          return codec.name !== 'rtx';
+        });
+      }
+
+      localCapabilities.codecs.forEach(function (codec) {
+        // work around https://bugs.chromium.org/p/webrtc/issues/detail?id=6552
+        // by adding level-asymmetry-allowed=1
+        if (codec.name === 'H264' && codec.parameters['level-asymmetry-allowed'] === undefined) {
+          codec.parameters['level-asymmetry-allowed'] = '1';
+        } // for subsequent offers, we might have to re-use the payload
+        // type of the last offer.
+
+
+        if (transceiver.remoteCapabilities && transceiver.remoteCapabilities.codecs) {
+          transceiver.remoteCapabilities.codecs.forEach(function (remoteCodec) {
+            if (codec.name.toLowerCase() === remoteCodec.name.toLowerCase() && codec.clockRate === remoteCodec.clockRate) {
+              codec.preferredPayloadType = remoteCodec.payloadType;
+            }
+          });
+        }
+      });
+      localCapabilities.headerExtensions.forEach(function (hdrExt) {
+        var remoteExtensions = transceiver.remoteCapabilities && transceiver.remoteCapabilities.headerExtensions || [];
+        remoteExtensions.forEach(function (rHdrExt) {
+          if (hdrExt.uri === rHdrExt.uri) {
+            hdrExt.id = rHdrExt.id;
+          }
+        });
+      }); // generate an ssrc now, to be used later in rtpSender.send
+
+      var sendEncodingParameters = transceiver.sendEncodingParameters || [{
+        ssrc: (2 * sdpMLineIndex + 1) * 1001
+      }];
+
+      if (track) {
+        // add RTX
+        if (edgeVersion >= 15019 && kind === 'video' && !sendEncodingParameters[0].rtx) {
+          sendEncodingParameters[0].rtx = {
+            ssrc: sendEncodingParameters[0].ssrc + 1
+          };
+        }
+      }
+
+      if (transceiver.wantReceive) {
+        transceiver.rtpReceiver = new window.RTCRtpReceiver(transceiver.dtlsTransport, kind);
+      }
+
+      transceiver.localCapabilities = localCapabilities;
+      transceiver.sendEncodingParameters = sendEncodingParameters;
+    }); // always offer BUNDLE and dispose on return if not supported.
+
+    if (pc._config.bundlePolicy !== 'max-compat') {
+      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function (t) {
+        return t.mid;
+      }).join(' ') + '\r\n';
+    }
+
+    sdp += 'a=ice-options:trickle\r\n';
+    pc.transceivers.forEach(function (transceiver, sdpMLineIndex) {
+      sdp += writeMediaSection(transceiver, transceiver.localCapabilities, 'offer', transceiver.stream, pc._dtlsRole);
+      sdp += 'a=rtcp-rsize\r\n';
+
+      if (transceiver.iceGatherer && pc.iceGatheringState !== 'new' && (sdpMLineIndex === 0 || !pc.usingBundle)) {
+        transceiver.iceGatherer.getLocalCandidates().forEach(function (cand) {
+          cand.component = 1;
+          sdp += 'a=' + SDPUtils.writeCandidate(cand) + '\r\n';
+        });
+
+        if (transceiver.iceGatherer.state === 'completed') {
+          sdp += 'a=end-of-candidates\r\n';
+        }
+      }
+    });
+    var desc = new window.RTCSessionDescription({
+      type: 'offer',
+      sdp: sdp
+    });
+    return Promise.resolve(desc);
+  };
+
+  RTCPeerConnection.prototype.createAnswer = function () {
+    var pc = this;
+
+    if (pc._isClosed) {
+      return Promise.reject(makeError('InvalidStateError', 'Can not call createAnswer after close'));
+    }
+
+    if (!(pc.signalingState === 'have-remote-offer' || pc.signalingState === 'have-local-pranswer')) {
+      return Promise.reject(makeError('InvalidStateError', 'Can not call createAnswer in signalingState ' + pc.signalingState));
+    }
+
+    var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId, pc._sdpSessionVersion++);
+
+    if (pc.usingBundle) {
+      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function (t) {
+        return t.mid;
+      }).join(' ') + '\r\n';
+    }
+
+    sdp += 'a=ice-options:trickle\r\n';
+    var mediaSectionsInOffer = SDPUtils.getMediaSections(pc._remoteDescription.sdp).length;
+    pc.transceivers.forEach(function (transceiver, sdpMLineIndex) {
+      if (sdpMLineIndex + 1 > mediaSectionsInOffer) {
+        return;
+      }
+
+      if (transceiver.rejected) {
+        if (transceiver.kind === 'application') {
+          if (transceiver.protocol === 'DTLS/SCTP') {
+            // legacy fmt
+            sdp += 'm=application 0 DTLS/SCTP 5000\r\n';
+          } else {
+            sdp += 'm=application 0 ' + transceiver.protocol + ' webrtc-datachannel\r\n';
+          }
+        } else if (transceiver.kind === 'audio') {
+          sdp += 'm=audio 0 UDP/TLS/RTP/SAVPF 0\r\n' + 'a=rtpmap:0 PCMU/8000\r\n';
+        } else if (transceiver.kind === 'video') {
+          sdp += 'm=video 0 UDP/TLS/RTP/SAVPF 120\r\n' + 'a=rtpmap:120 VP8/90000\r\n';
+        }
+
+        sdp += 'c=IN IP4 0.0.0.0\r\n' + 'a=inactive\r\n' + 'a=mid:' + transceiver.mid + '\r\n';
+        return;
+      } // FIXME: look at direction.
+
+
+      if (transceiver.stream) {
+        var localTrack;
+
+        if (transceiver.kind === 'audio') {
+          localTrack = transceiver.stream.getAudioTracks()[0];
+        } else if (transceiver.kind === 'video') {
+          localTrack = transceiver.stream.getVideoTracks()[0];
+        }
+
+        if (localTrack) {
+          // add RTX
+          if (edgeVersion >= 15019 && transceiver.kind === 'video' && !transceiver.sendEncodingParameters[0].rtx) {
+            transceiver.sendEncodingParameters[0].rtx = {
+              ssrc: transceiver.sendEncodingParameters[0].ssrc + 1
+            };
+          }
+        }
+      } // Calculate intersection of capabilities.
+
+
+      var commonCapabilities = getCommonCapabilities(transceiver.localCapabilities, transceiver.remoteCapabilities);
+      var hasRtx = commonCapabilities.codecs.filter(function (c) {
+        return c.name.toLowerCase() === 'rtx';
+      }).length;
+
+      if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
+        delete transceiver.sendEncodingParameters[0].rtx;
+      }
+
+      sdp += writeMediaSection(transceiver, commonCapabilities, 'answer', transceiver.stream, pc._dtlsRole);
+
+      if (transceiver.rtcpParameters && transceiver.rtcpParameters.reducedSize) {
+        sdp += 'a=rtcp-rsize\r\n';
+      }
+    });
+    var desc = new window.RTCSessionDescription({
+      type: 'answer',
+      sdp: sdp
+    });
+    return Promise.resolve(desc);
+  };
+
+  RTCPeerConnection.prototype.addIceCandidate = function (candidate) {
+    var pc = this;
+    var sections;
+
+    if (candidate && !(candidate.sdpMLineIndex !== undefined || candidate.sdpMid)) {
+      return Promise.reject(new TypeError('sdpMLineIndex or sdpMid required'));
+    } // TODO: needs to go into ops queue.
+
+
+    return new Promise(function (resolve, reject) {
+      if (!pc._remoteDescription) {
+        return reject(makeError('InvalidStateError', 'Can not add ICE candidate without a remote description'));
+      } else if (!candidate || candidate.candidate === '') {
+        for (var j = 0; j < pc.transceivers.length; j++) {
+          if (pc.transceivers[j].rejected) {
+            continue;
+          }
+
+          pc.transceivers[j].iceTransport.addRemoteCandidate({});
+          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
+          sections[j] += 'a=end-of-candidates\r\n';
+          pc._remoteDescription.sdp = SDPUtils.getDescription(pc._remoteDescription.sdp) + sections.join('');
+
+          if (pc.usingBundle) {
+            break;
+          }
+        }
+      } else {
+        var sdpMLineIndex = candidate.sdpMLineIndex;
+
+        if (candidate.sdpMid) {
+          for (var i = 0; i < pc.transceivers.length; i++) {
+            if (pc.transceivers[i].mid === candidate.sdpMid) {
+              sdpMLineIndex = i;
+              break;
+            }
+          }
+        }
+
+        var transceiver = pc.transceivers[sdpMLineIndex];
+
+        if (transceiver) {
+          if (transceiver.rejected) {
+            return resolve();
+          }
+
+          var cand = Object.keys(candidate.candidate).length > 0 ? SDPUtils.parseCandidate(candidate.candidate) : {}; // Ignore Chrome's invalid candidates since Edge does not like them.
+
+          if (cand.protocol === 'tcp' && (cand.port === 0 || cand.port === 9)) {
+            return resolve();
+          } // Ignore RTCP candidates, we assume RTCP-MUX.
+
+
+          if (cand.component && cand.component !== 1) {
+            return resolve();
+          } // when using bundle, avoid adding candidates to the wrong
+          // ice transport. And avoid adding candidates added in the SDP.
+
+
+          if (sdpMLineIndex === 0 || sdpMLineIndex > 0 && transceiver.iceTransport !== pc.transceivers[0].iceTransport) {
+            if (!maybeAddCandidate(transceiver.iceTransport, cand)) {
+              return reject(makeError('OperationError', 'Can not add ICE candidate'));
+            }
+          } // update the remoteDescription.
+
+
+          var candidateString = candidate.candidate.trim();
+
+          if (candidateString.indexOf('a=') === 0) {
+            candidateString = candidateString.substr(2);
+          }
+
+          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
+          sections[sdpMLineIndex] += 'a=' + (cand.type ? candidateString : 'end-of-candidates') + '\r\n';
+          pc._remoteDescription.sdp = SDPUtils.getDescription(pc._remoteDescription.sdp) + sections.join('');
+        } else {
+          return reject(makeError('OperationError', 'Can not add ICE candidate'));
+        }
+      }
+
+      resolve();
+    });
+  };
+
+  RTCPeerConnection.prototype.getStats = function (selector) {
+    if (selector && selector instanceof window.MediaStreamTrack) {
+      var senderOrReceiver = null;
+      this.transceivers.forEach(function (transceiver) {
+        if (transceiver.rtpSender && transceiver.rtpSender.track === selector) {
+          senderOrReceiver = transceiver.rtpSender;
+        } else if (transceiver.rtpReceiver && transceiver.rtpReceiver.track === selector) {
+          senderOrReceiver = transceiver.rtpReceiver;
+        }
+      });
+
+      if (!senderOrReceiver) {
+        throw makeError('InvalidAccessError', 'Invalid selector.');
+      }
+
+      return senderOrReceiver.getStats();
+    }
+
+    var promises = [];
+    this.transceivers.forEach(function (transceiver) {
+      ['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport', 'dtlsTransport'].forEach(function (method) {
+        if (transceiver[method]) {
+          promises.push(transceiver[method].getStats());
+        }
+      });
+    });
+    return Promise.all(promises).then(function (allStats) {
+      var results = new Map();
+      allStats.forEach(function (stats) {
+        stats.forEach(function (stat) {
+          results.set(stat.id, stat);
+        });
+      });
+      return results;
+    });
+  }; // fix low-level stat names and return Map instead of object.
+
+
+  var ortcObjects = ['RTCRtpSender', 'RTCRtpReceiver', 'RTCIceGatherer', 'RTCIceTransport', 'RTCDtlsTransport'];
+  ortcObjects.forEach(function (ortcObjectName) {
+    var obj = window[ortcObjectName];
+
+    if (obj && obj.prototype && obj.prototype.getStats) {
+      var nativeGetstats = obj.prototype.getStats;
+
+      obj.prototype.getStats = function () {
+        return nativeGetstats.apply(this).then(function (nativeStats) {
+          var mapStats = new Map();
+          Object.keys(nativeStats).forEach(function (id) {
+            nativeStats[id].type = fixStatsType(nativeStats[id]);
+            mapStats.set(id, nativeStats[id]);
+          });
+          return mapStats;
+        });
+      };
+    }
+  }); // legacy callback shims. Should be moved to adapter.js some days.
+
+  var methods = ['createOffer', 'createAnswer'];
+  methods.forEach(function (method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+
+    RTCPeerConnection.prototype[method] = function () {
+      var args = arguments;
+
+      if (typeof args[0] === 'function' || typeof args[1] === 'function') {
+        // legacy
+        return nativeMethod.apply(this, [arguments[2]]).then(function (description) {
+          if (typeof args[0] === 'function') {
+            args[0].apply(null, [description]);
+          }
+        }, function (error) {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null, [error]);
+          }
+        });
+      }
+
+      return nativeMethod.apply(this, arguments);
+    };
+  });
+  methods = ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'];
+  methods.forEach(function (method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+
+    RTCPeerConnection.prototype[method] = function () {
+      var args = arguments;
+
+      if (typeof args[1] === 'function' || typeof args[2] === 'function') {
+        // legacy
+        return nativeMethod.apply(this, arguments).then(function () {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null);
+          }
+        }, function (error) {
+          if (typeof args[2] === 'function') {
+            args[2].apply(null, [error]);
+          }
+        });
+      }
+
+      return nativeMethod.apply(this, arguments);
+    };
+  }); // getStats is special. It doesn't have a spec legacy method yet we support
+  // getStats(something, cb) without error callbacks.
+
+  ['getStats'].forEach(function (method) {
+    var nativeMethod = RTCPeerConnection.prototype[method];
+
+    RTCPeerConnection.prototype[method] = function () {
+      var args = arguments;
+
+      if (typeof args[1] === 'function') {
+        return nativeMethod.apply(this, arguments).then(function () {
+          if (typeof args[1] === 'function') {
+            args[1].apply(null);
+          }
+        });
+      }
+
+      return nativeMethod.apply(this, arguments);
+    };
+  });
+  return RTCPeerConnection;
+};
+
+},{"sdp":14}],14:[function(require,module,exports){
+/* eslint-env node */
+'use strict'; // SDP helpers.
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+var SDPUtils = {}; // Generate an alphanumeric identifier for cname or mids.
+// TODO: use UUIDs instead? https://gist.github.com/jed/982883
+
+SDPUtils.generateIdentifier = function () {
+  return Math.random().toString(36).substr(2, 10);
+}; // The RTCP CNAME used by all peerconnections from the same JS.
+
+
+SDPUtils.localCName = SDPUtils.generateIdentifier(); // Splits SDP into lines, dealing with both CRLF and LF.
+
+SDPUtils.splitLines = function (blob) {
+  return blob.trim().split('\n').map(function (line) {
+    return line.trim();
+  });
+}; // Splits SDP into sessionpart and mediasections. Ensures CRLF.
+
+
+SDPUtils.splitSections = function (blob) {
+  var parts = blob.split('\nm=');
+  return parts.map(function (part, index) {
+    return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
+  });
+}; // returns the session description.
+
+
+SDPUtils.getDescription = function (blob) {
+  var sections = SDPUtils.splitSections(blob);
+  return sections && sections[0];
+}; // returns the individual media sections.
+
+
+SDPUtils.getMediaSections = function (blob) {
+  var sections = SDPUtils.splitSections(blob);
+  sections.shift();
+  return sections;
+}; // Returns lines that start with a certain prefix.
+
+
+SDPUtils.matchPrefix = function (blob, prefix) {
+  return SDPUtils.splitLines(blob).filter(function (line) {
+    return line.indexOf(prefix) === 0;
+  });
+}; // Parses an ICE candidate line. Sample input:
+// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
+// rport 55996"
+
+
+SDPUtils.parseCandidate = function (line) {
+  var parts; // Parse both variants.
+
+  if (line.indexOf('a=candidate:') === 0) {
+    parts = line.substring(12).split(' ');
+  } else {
+    parts = line.substring(10).split(' ');
+  }
+
+  var candidate = {
+    foundation: parts[0],
+    component: parseInt(parts[1], 10),
+    protocol: parts[2].toLowerCase(),
+    priority: parseInt(parts[3], 10),
+    ip: parts[4],
+    address: parts[4],
+    // address is an alias for ip.
+    port: parseInt(parts[5], 10),
+    // skip parts[6] == 'typ'
+    type: parts[7]
+  };
+
+  for (var i = 8; i < parts.length; i += 2) {
+    switch (parts[i]) {
+      case 'raddr':
+        candidate.relatedAddress = parts[i + 1];
+        break;
+
+      case 'rport':
+        candidate.relatedPort = parseInt(parts[i + 1], 10);
+        break;
+
+      case 'tcptype':
+        candidate.tcpType = parts[i + 1];
+        break;
+
+      case 'ufrag':
+        candidate.ufrag = parts[i + 1]; // for backward compability.
+
+        candidate.usernameFragment = parts[i + 1];
+        break;
+
+      default:
+        // extension handling, in particular ufrag
+        candidate[parts[i]] = parts[i + 1];
+        break;
+    }
+  }
+
+  return candidate;
+}; // Translates a candidate object into SDP candidate attribute.
+
+
+SDPUtils.writeCandidate = function (candidate) {
+  var sdp = [];
+  sdp.push(candidate.foundation);
+  sdp.push(candidate.component);
+  sdp.push(candidate.protocol.toUpperCase());
+  sdp.push(candidate.priority);
+  sdp.push(candidate.address || candidate.ip);
+  sdp.push(candidate.port);
+  var type = candidate.type;
+  sdp.push('typ');
+  sdp.push(type);
+
+  if (type !== 'host' && candidate.relatedAddress && candidate.relatedPort) {
+    sdp.push('raddr');
+    sdp.push(candidate.relatedAddress);
+    sdp.push('rport');
+    sdp.push(candidate.relatedPort);
+  }
+
+  if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
+    sdp.push('tcptype');
+    sdp.push(candidate.tcpType);
+  }
+
+  if (candidate.usernameFragment || candidate.ufrag) {
+    sdp.push('ufrag');
+    sdp.push(candidate.usernameFragment || candidate.ufrag);
+  }
+
+  return 'candidate:' + sdp.join(' ');
+}; // Parses an ice-options line, returns an array of option tags.
+// a=ice-options:foo bar
+
+
+SDPUtils.parseIceOptions = function (line) {
+  return line.substr(14).split(' ');
+}; // Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
+// a=rtpmap:111 opus/48000/2
+
+
+SDPUtils.parseRtpMap = function (line) {
+  var parts = line.substr(9).split(' ');
+  var parsed = {
+    payloadType: parseInt(parts.shift(), 10) // was: id
+
+  };
+  parts = parts[0].split('/');
+  parsed.name = parts[0];
+  parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
+
+  parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1; // legacy alias, got renamed back to channels in ORTC.
+
+  parsed.numChannels = parsed.channels;
+  return parsed;
+}; // Generate an a=rtpmap line from RTCRtpCodecCapability or
+// RTCRtpCodecParameters.
+
+
+SDPUtils.writeRtpMap = function (codec) {
+  var pt = codec.payloadType;
+
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+
+  var channels = codec.channels || codec.numChannels || 1;
+  return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + (channels !== 1 ? '/' + channels : '') + '\r\n';
+}; // Parses an a=extmap line (headerextension from RFC 5285). Sample input:
+// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
+// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
+
+
+SDPUtils.parseExtmap = function (line) {
+  var parts = line.substr(9).split(' ');
+  return {
+    id: parseInt(parts[0], 10),
+    direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
+    uri: parts[1]
+  };
+}; // Generates a=extmap line from RTCRtpHeaderExtensionParameters or
+// RTCRtpHeaderExtension.
+
+
+SDPUtils.writeExtmap = function (headerExtension) {
+  return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) + (headerExtension.direction && headerExtension.direction !== 'sendrecv' ? '/' + headerExtension.direction : '') + ' ' + headerExtension.uri + '\r\n';
+}; // Parses an ftmp line, returns dictionary. Sample input:
+// a=fmtp:96 vbr=on;cng=on
+// Also deals with vbr=on; cng=on
+
+
+SDPUtils.parseFmtp = function (line) {
+  var parsed = {};
+  var kv;
+  var parts = line.substr(line.indexOf(' ') + 1).split(';');
+
+  for (var j = 0; j < parts.length; j++) {
+    kv = parts[j].trim().split('=');
+    parsed[kv[0].trim()] = kv[1];
+  }
+
+  return parsed;
+}; // Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
+
+
+SDPUtils.writeFmtp = function (codec) {
+  var line = '';
+  var pt = codec.payloadType;
+
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+
+  if (codec.parameters && Object.keys(codec.parameters).length) {
+    var params = [];
+    Object.keys(codec.parameters).forEach(function (param) {
+      if (codec.parameters[param]) {
+        params.push(param + '=' + codec.parameters[param]);
+      } else {
+        params.push(param);
+      }
+    });
+    line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
+  }
+
+  return line;
+}; // Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
+// a=rtcp-fb:98 nack rpsi
+
+
+SDPUtils.parseRtcpFb = function (line) {
+  var parts = line.substr(line.indexOf(' ') + 1).split(' ');
+  return {
+    type: parts.shift(),
+    parameter: parts.join(' ')
+  };
+}; // Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
+
+
+SDPUtils.writeRtcpFb = function (codec) {
+  var lines = '';
+  var pt = codec.payloadType;
+
+  if (codec.preferredPayloadType !== undefined) {
+    pt = codec.preferredPayloadType;
+  }
+
+  if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
+    // FIXME: special handling for trr-int?
+    codec.rtcpFeedback.forEach(function (fb) {
+      lines += 'a=rtcp-fb:' + pt + ' ' + fb.type + (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') + '\r\n';
+    });
+  }
+
+  return lines;
+}; // Parses an RFC 5576 ssrc media attribute. Sample input:
+// a=ssrc:3735928559 cname:something
+
+
+SDPUtils.parseSsrcMedia = function (line) {
+  var sp = line.indexOf(' ');
+  var parts = {
+    ssrc: parseInt(line.substr(7, sp - 7), 10)
+  };
+  var colon = line.indexOf(':', sp);
+
+  if (colon > -1) {
+    parts.attribute = line.substr(sp + 1, colon - sp - 1);
+    parts.value = line.substr(colon + 1);
+  } else {
+    parts.attribute = line.substr(sp + 1);
+  }
+
+  return parts;
+};
+
+SDPUtils.parseSsrcGroup = function (line) {
+  var parts = line.substr(13).split(' ');
+  return {
+    semantics: parts.shift(),
+    ssrcs: parts.map(function (ssrc) {
+      return parseInt(ssrc, 10);
+    })
+  };
+}; // Extracts the MID (RFC 5888) from a media section.
+// returns the MID or undefined if no mid line was found.
+
+
+SDPUtils.getMid = function (mediaSection) {
+  var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
+
+  if (mid) {
+    return mid.substr(6);
+  }
+};
+
+SDPUtils.parseFingerprint = function (line) {
+  var parts = line.substr(14).split(' ');
+  return {
+    algorithm: parts[0].toLowerCase(),
+    // algorithm is case-sensitive in Edge.
+    value: parts[1]
+  };
+}; // Extracts DTLS parameters from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the fingerprint line as input. See also getIceParameters.
+
+
+SDPUtils.getDtlsParameters = function (mediaSection, sessionpart) {
+  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=fingerprint:'); // Note: a=setup line is ignored since we use the 'auto' role.
+  // Note2: 'algorithm' is not case sensitive except in Edge.
+
+  return {
+    role: 'auto',
+    fingerprints: lines.map(SDPUtils.parseFingerprint)
+  };
+}; // Serializes DTLS parameters to SDP.
+
+
+SDPUtils.writeDtlsParameters = function (params, setupType) {
+  var sdp = 'a=setup:' + setupType + '\r\n';
+  params.fingerprints.forEach(function (fp) {
+    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
+  });
+  return sdp;
+}; // Parses ICE information from SDP media section or sessionpart.
+// FIXME: for consistency with other functions this should only
+//   get the ice-ufrag and ice-pwd lines as input.
+
+
+SDPUtils.getIceParameters = function (mediaSection, sessionpart) {
+  var lines = SDPUtils.splitLines(mediaSection); // Search in session part, too.
+
+  lines = lines.concat(SDPUtils.splitLines(sessionpart));
+  var iceParameters = {
+    usernameFragment: lines.filter(function (line) {
+      return line.indexOf('a=ice-ufrag:') === 0;
+    })[0].substr(12),
+    password: lines.filter(function (line) {
+      return line.indexOf('a=ice-pwd:') === 0;
+    })[0].substr(10)
+  };
+  return iceParameters;
+}; // Serializes ICE parameters to SDP.
+
+
+SDPUtils.writeIceParameters = function (params) {
+  return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' + 'a=ice-pwd:' + params.password + '\r\n';
+}; // Parses the SDP media section and returns RTCRtpParameters.
+
+
+SDPUtils.parseRtpParameters = function (mediaSection) {
+  var description = {
+    codecs: [],
+    headerExtensions: [],
+    fecMechanisms: [],
+    rtcp: []
+  };
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+
+  for (var i = 3; i < mline.length; i++) {
+    // find all codecs from mline[3..]
+    var pt = mline[i];
+    var rtpmapline = SDPUtils.matchPrefix(mediaSection, 'a=rtpmap:' + pt + ' ')[0];
+
+    if (rtpmapline) {
+      var codec = SDPUtils.parseRtpMap(rtpmapline);
+      var fmtps = SDPUtils.matchPrefix(mediaSection, 'a=fmtp:' + pt + ' '); // Only the first a=fmtp:<pt> is considered.
+
+      codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
+      codec.rtcpFeedback = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-fb:' + pt + ' ').map(SDPUtils.parseRtcpFb);
+      description.codecs.push(codec); // parse FEC mechanisms from rtpmap lines.
+
+      switch (codec.name.toUpperCase()) {
+        case 'RED':
+        case 'ULPFEC':
+          description.fecMechanisms.push(codec.name.toUpperCase());
+          break;
+
+        default:
+          // only RED and ULPFEC are recognized as FEC mechanisms.
+          break;
+      }
+    }
+  }
+
+  SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function (line) {
+    description.headerExtensions.push(SDPUtils.parseExtmap(line));
+  }); // FIXME: parse rtcp.
+
+  return description;
+}; // Generates parts of the SDP media section describing the capabilities /
+// parameters.
+
+
+SDPUtils.writeRtpDescription = function (kind, caps) {
+  var sdp = ''; // Build the mline.
+
+  sdp += 'm=' + kind + ' ';
+  sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
+
+  sdp += ' UDP/TLS/RTP/SAVPF ';
+  sdp += caps.codecs.map(function (codec) {
+    if (codec.preferredPayloadType !== undefined) {
+      return codec.preferredPayloadType;
+    }
+
+    return codec.payloadType;
+  }).join(' ') + '\r\n';
+  sdp += 'c=IN IP4 0.0.0.0\r\n';
+  sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n'; // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
+
+  caps.codecs.forEach(function (codec) {
+    sdp += SDPUtils.writeRtpMap(codec);
+    sdp += SDPUtils.writeFmtp(codec);
+    sdp += SDPUtils.writeRtcpFb(codec);
+  });
+  var maxptime = 0;
+  caps.codecs.forEach(function (codec) {
+    if (codec.maxptime > maxptime) {
+      maxptime = codec.maxptime;
+    }
+  });
+
+  if (maxptime > 0) {
+    sdp += 'a=maxptime:' + maxptime + '\r\n';
+  }
+
+  sdp += 'a=rtcp-mux\r\n';
+
+  if (caps.headerExtensions) {
+    caps.headerExtensions.forEach(function (extension) {
+      sdp += SDPUtils.writeExtmap(extension);
+    });
+  } // FIXME: write fecMechanisms.
+
+
+  return sdp;
+}; // Parses the SDP media section and returns an array of
+// RTCRtpEncodingParameters.
+
+
+SDPUtils.parseRtpEncodingParameters = function (mediaSection) {
+  var encodingParameters = [];
+  var description = SDPUtils.parseRtpParameters(mediaSection);
+  var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
+  var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1; // filter a=ssrc:... cname:, ignore PlanB-msid
+
+  var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (parts) {
+    return parts.attribute === 'cname';
+  });
+  var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
+  var secondarySsrc;
+  var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID').map(function (line) {
+    var parts = line.substr(17).split(' ');
+    return parts.map(function (part) {
+      return parseInt(part, 10);
+    });
+  });
+
+  if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
+    secondarySsrc = flows[0][1];
+  }
+
+  description.codecs.forEach(function (codec) {
+    if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
+      var encParam = {
+        ssrc: primarySsrc,
+        codecPayloadType: parseInt(codec.parameters.apt, 10)
+      };
+
+      if (primarySsrc && secondarySsrc) {
+        encParam.rtx = {
+          ssrc: secondarySsrc
+        };
+      }
+
+      encodingParameters.push(encParam);
+
+      if (hasRed) {
+        encParam = JSON.parse(JSON.stringify(encParam));
+        encParam.fec = {
+          ssrc: primarySsrc,
+          mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
+        };
+        encodingParameters.push(encParam);
+      }
+    }
+  });
+
+  if (encodingParameters.length === 0 && primarySsrc) {
+    encodingParameters.push({
+      ssrc: primarySsrc
+    });
+  } // we support both b=AS and b=TIAS but interpret AS as TIAS.
+
+
+  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
+
+  if (bandwidth.length) {
+    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
+      bandwidth = parseInt(bandwidth[0].substr(7), 10);
+    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
+      // use formula from JSEP to convert b=AS to TIAS value.
+      bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95 - 50 * 40 * 8;
+    } else {
+      bandwidth = undefined;
+    }
+
+    encodingParameters.forEach(function (params) {
+      params.maxBitrate = bandwidth;
+    });
+  }
+
+  return encodingParameters;
+}; // parses http://draft.ortc.org/#rtcrtcpparameters*
+
+
+SDPUtils.parseRtcpParameters = function (mediaSection) {
+  var rtcpParameters = {}; // Gets the first SSRC. Note tha with RTX there might be multiple
+  // SSRCs.
+
+  var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (obj) {
+    return obj.attribute === 'cname';
+  })[0];
+
+  if (remoteSsrc) {
+    rtcpParameters.cname = remoteSsrc.value;
+    rtcpParameters.ssrc = remoteSsrc.ssrc;
+  } // Edge uses the compound attribute instead of reducedSize
+  // compound is !reducedSize
+
+
+  var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
+  rtcpParameters.reducedSize = rsize.length > 0;
+  rtcpParameters.compound = rsize.length === 0; // parses the rtcp-mux attrіbute.
+  // Note that Edge does not support unmuxed RTCP.
+
+  var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
+  rtcpParameters.mux = mux.length > 0;
+  return rtcpParameters;
+}; // parses either a=msid: or a=ssrc:... msid lines and returns
+// the id of the MediaStream and MediaStreamTrack.
+
+
+SDPUtils.parseMsid = function (mediaSection) {
+  var parts;
+  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
+
+  if (spec.length === 1) {
+    parts = spec[0].substr(7).split(' ');
+    return {
+      stream: parts[0],
+      track: parts[1]
+    };
+  }
+
+  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
+    return SDPUtils.parseSsrcMedia(line);
+  }).filter(function (msidParts) {
+    return msidParts.attribute === 'msid';
+  });
+
+  if (planB.length > 0) {
+    parts = planB[0].value.split(' ');
+    return {
+      stream: parts[0],
+      track: parts[1]
+    };
+  }
+}; // Generate a session ID for SDP.
+// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
+// recommends using a cryptographically random +ve 64-bit value
+// but right now this should be acceptable and within the right range
+
+
+SDPUtils.generateSessionId = function () {
+  return Math.random().toString().substr(2, 21);
+}; // Write boilder plate for start of SDP
+// sessId argument is optional - if not supplied it will
+// be generated randomly
+// sessVersion is optional and defaults to 2
+// sessUser is optional and defaults to 'thisisadapterortc'
+
+
+SDPUtils.writeSessionBoilerplate = function (sessId, sessVer, sessUser) {
+  var sessionId;
+  var version = sessVer !== undefined ? sessVer : 2;
+
+  if (sessId) {
+    sessionId = sessId;
+  } else {
+    sessionId = SDPUtils.generateSessionId();
+  }
+
+  var user = sessUser || 'thisisadapterortc'; // FIXME: sess-id should be an NTP timestamp.
+
+  return 'v=0\r\n' + 'o=' + user + ' ' + sessionId + ' ' + version + ' IN IP4 127.0.0.1\r\n' + 's=-\r\n' + 't=0 0\r\n';
+};
+
+SDPUtils.writeMediaSection = function (transceiver, caps, type, stream) {
+  var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps); // Map ICE parameters (ufrag, pwd) to SDP.
+
+  sdp += SDPUtils.writeIceParameters(transceiver.iceGatherer.getLocalParameters()); // Map DTLS parameters to SDP.
+
+  sdp += SDPUtils.writeDtlsParameters(transceiver.dtlsTransport.getLocalParameters(), type === 'offer' ? 'actpass' : 'active');
+  sdp += 'a=mid:' + transceiver.mid + '\r\n';
+
+  if (transceiver.direction) {
+    sdp += 'a=' + transceiver.direction + '\r\n';
+  } else if (transceiver.rtpSender && transceiver.rtpReceiver) {
+    sdp += 'a=sendrecv\r\n';
+  } else if (transceiver.rtpSender) {
+    sdp += 'a=sendonly\r\n';
+  } else if (transceiver.rtpReceiver) {
+    sdp += 'a=recvonly\r\n';
+  } else {
+    sdp += 'a=inactive\r\n';
+  }
+
+  if (transceiver.rtpSender) {
+    // spec.
+    var msid = 'msid:' + stream.id + ' ' + transceiver.rtpSender.track.id + '\r\n';
+    sdp += 'a=' + msid; // for Chrome.
+
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc + ' ' + msid;
+
+    if (transceiver.sendEncodingParameters[0].rtx) {
+      sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc + ' ' + msid;
+      sdp += 'a=ssrc-group:FID ' + transceiver.sendEncodingParameters[0].ssrc + ' ' + transceiver.sendEncodingParameters[0].rtx.ssrc + '\r\n';
+    }
+  } // FIXME: this should be written by writeRtpDescription.
+
+
+  sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc + ' cname:' + SDPUtils.localCName + '\r\n';
+
+  if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
+    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc + ' cname:' + SDPUtils.localCName + '\r\n';
+  }
+
+  return sdp;
+}; // Gets the direction from the mediaSection or the sessionpart.
+
+
+SDPUtils.getDirection = function (mediaSection, sessionpart) {
+  // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
+  var lines = SDPUtils.splitLines(mediaSection);
+
+  for (var i = 0; i < lines.length; i++) {
+    switch (lines[i]) {
+      case 'a=sendrecv':
+      case 'a=sendonly':
+      case 'a=recvonly':
+      case 'a=inactive':
+        return lines[i].substr(2);
+
+      default: // FIXME: What should happen here?
+
+    }
+  }
+
+  if (sessionpart) {
+    return SDPUtils.getDirection(sessionpart);
+  }
+
+  return 'sendrecv';
+};
+
+SDPUtils.getKind = function (mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var mline = lines[0].split(' ');
+  return mline[0].substr(2);
+};
+
+SDPUtils.isRejected = function (mediaSection) {
+  return mediaSection.split(' ', 2)[1] === '0';
+};
+
+SDPUtils.parseMLine = function (mediaSection) {
+  var lines = SDPUtils.splitLines(mediaSection);
+  var parts = lines[0].substr(2).split(' ');
+  return {
+    kind: parts[0],
+    port: parseInt(parts[1], 10),
+    protocol: parts[2],
+    fmt: parts.slice(3).join(' ')
+  };
+};
+
+SDPUtils.parseOLine = function (mediaSection) {
+  var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
+  var parts = line.substr(2).split(' ');
+  return {
+    username: parts[0],
+    sessionId: parts[1],
+    sessionVersion: parseInt(parts[2], 10),
+    netType: parts[3],
+    addressType: parts[4],
+    address: parts[5]
+  };
+}; // a very naive interpretation of a valid SDP.
+
+
+SDPUtils.isValidSDP = function (blob) {
+  if (typeof blob !== 'string' || blob.length === 0) {
+    return false;
+  }
+
+  var lines = SDPUtils.splitLines(blob);
+
+  for (var i = 0; i < lines.length; i++) {
+    if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
+      return false;
+    } // TODO: check the modifier a bit more.
+
+  }
+
+  return true;
+}; // Expose public methods.
+
+
+if ((typeof module === "undefined" ? "undefined" : _typeof(module)) === 'object') {
+  module.exports = SDPUtils;
+}
+
+},{}],15:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+var _adapter_factory = require("./adapter_factory.js");
+
+var adapter = (0, _adapter_factory.adapterFactory)({
+  window: window
+});
+module.exports = adapter; // this is the difference from adapter_core.
+
+},{"./adapter_factory.js":16}],16:[function(require,module,exports){
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.adapterFactory = adapterFactory;
+
+var utils = _interopRequireWildcard(require("./utils"));
+
+var chromeShim = _interopRequireWildcard(require("./chrome/chrome_shim"));
+
+var edgeShim = _interopRequireWildcard(require("./edge/edge_shim"));
+
+var firefoxShim = _interopRequireWildcard(require("./firefox/firefox_shim"));
+
+var safariShim = _interopRequireWildcard(require("./safari/safari_shim"));
+
+var commonShim = _interopRequireWildcard(require("./common_shim"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+// Browser shims.
+// Shimming starts here.
+function adapterFactory() {
+  var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
+      window = _ref.window;
+
+  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
+    shimChrome: true,
+    shimFirefox: true,
+    shimEdge: true,
+    shimSafari: true
+  };
+  // Utils.
+  var logging = utils.log;
+  var browserDetails = utils.detectBrowser(window);
+  var adapter = {
+    browserDetails: browserDetails,
+    commonShim: commonShim,
+    extractVersion: utils.extractVersion,
+    disableLog: utils.disableLog,
+    disableWarnings: utils.disableWarnings
+  }; // Shim browser if found.
+
+  switch (browserDetails.browser) {
+    case 'chrome':
+      if (!chromeShim || !chromeShim.shimPeerConnection || !options.shimChrome) {
+        logging('Chrome shim is not included in this adapter release.');
+        return adapter;
+      }
+
+      logging('adapter.js shimming chrome.'); // Export to the adapter global object visible in the browser.
+
+      adapter.browserShim = chromeShim;
+      chromeShim.shimGetUserMedia(window);
+      chromeShim.shimMediaStream(window);
+      chromeShim.shimPeerConnection(window);
+      chromeShim.shimOnTrack(window);
+      chromeShim.shimAddTrackRemoveTrack(window);
+      chromeShim.shimGetSendersWithDtmf(window);
+      chromeShim.shimSenderReceiverGetStats(window);
+      chromeShim.fixNegotiationNeeded(window);
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimConnectionState(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      commonShim.removeAllowExtmapMixed(window);
+      break;
+
+    case 'firefox':
+      if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {
+        logging('Firefox shim is not included in this adapter release.');
+        return adapter;
+      }
+
+      logging('adapter.js shimming firefox.'); // Export to the adapter global object visible in the browser.
+
+      adapter.browserShim = firefoxShim;
+      firefoxShim.shimGetUserMedia(window);
+      firefoxShim.shimPeerConnection(window);
+      firefoxShim.shimOnTrack(window);
+      firefoxShim.shimRemoveStream(window);
+      firefoxShim.shimSenderGetStats(window);
+      firefoxShim.shimReceiverGetStats(window);
+      firefoxShim.shimRTCDataChannel(window);
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimConnectionState(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      break;
+
+    case 'edge':
+      if (!edgeShim || !edgeShim.shimPeerConnection || !options.shimEdge) {
+        logging('MS edge shim is not included in this adapter release.');
+        return adapter;
+      }
+
+      logging('adapter.js shimming edge.'); // Export to the adapter global object visible in the browser.
+
+      adapter.browserShim = edgeShim;
+      edgeShim.shimGetUserMedia(window);
+      edgeShim.shimGetDisplayMedia(window);
+      edgeShim.shimPeerConnection(window);
+      edgeShim.shimReplaceTrack(window); // the edge shim implements the full RTCIceCandidate object.
+
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      break;
+
+    case 'safari':
+      if (!safariShim || !options.shimSafari) {
+        logging('Safari shim is not included in this adapter release.');
+        return adapter;
+      }
+
+      logging('adapter.js shimming safari.'); // Export to the adapter global object visible in the browser.
+
+      adapter.browserShim = safariShim;
+      safariShim.shimRTCIceServerUrls(window);
+      safariShim.shimCreateOfferLegacy(window);
+      safariShim.shimCallbacksAPI(window);
+      safariShim.shimLocalStreamsAPI(window);
+      safariShim.shimRemoteStreamsAPI(window);
+      safariShim.shimTrackEventTransceiver(window);
+      safariShim.shimGetUserMedia(window);
+      commonShim.shimRTCIceCandidate(window);
+      commonShim.shimMaxMessageSize(window);
+      commonShim.shimSendThrowTypeError(window);
+      commonShim.removeAllowExtmapMixed(window);
+      break;
+
+    default:
+      logging('Unsupported browser!');
+      break;
+  }
+
+  return adapter;
+}
+
+},{"./chrome/chrome_shim":17,"./common_shim":20,"./edge/edge_shim":21,"./firefox/firefox_shim":25,"./safari/safari_shim":28,"./utils":29}],17:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimMediaStream = shimMediaStream;
+exports.shimOnTrack = shimOnTrack;
+exports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;
+exports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;
+exports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;
+exports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.fixNegotiationNeeded = fixNegotiationNeeded;
+Object.defineProperty(exports, "shimGetUserMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+Object.defineProperty(exports, "shimGetDisplayMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+
+var utils = _interopRequireWildcard(require("../utils.js"));
+
+var _getusermedia = require("./getusermedia");
+
+var _getdisplaymedia = require("./getdisplaymedia");
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+/* iterates the stats graph recursively. */
+function walkStats(stats, base, resultSet) {
+  if (!base || resultSet.has(base.id)) {
+    return;
+  }
+
+  resultSet.set(base.id, base);
+  Object.keys(base).forEach(function (name) {
+    if (name.endsWith('Id')) {
+      walkStats(stats, stats.get(base[name]), resultSet);
+    } else if (name.endsWith('Ids')) {
+      base[name].forEach(function (id) {
+        walkStats(stats, stats.get(id), resultSet);
+      });
+    }
+  });
+}
+/* filter getStats for a sender/receiver track. */
+
+
+function filterStats(result, track, outbound) {
+  var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
+  var filteredResult = new Map();
+
+  if (track === null) {
+    return filteredResult;
+  }
+
+  var trackStats = [];
+  result.forEach(function (value) {
+    if (value.type === 'track' && value.trackIdentifier === track.id) {
+      trackStats.push(value);
+    }
+  });
+  trackStats.forEach(function (trackStat) {
+    result.forEach(function (stats) {
+      if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
+        walkStats(result, stats, filteredResult);
+      }
+    });
+  });
+  return filteredResult;
+}
+
+function shimMediaStream(window) {
+  window.MediaStream = window.MediaStream || window.webkitMediaStream;
+}
+
+function shimOnTrack(window) {
+  if (_typeof(window) === 'object' && window.RTCPeerConnection && !('ontrack' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
+      get: function get() {
+        return this._ontrack;
+      },
+      set: function set(f) {
+        if (this._ontrack) {
+          this.removeEventListener('track', this._ontrack);
+        }
+
+        this.addEventListener('track', this._ontrack = f);
+      },
+      enumerable: true,
+      configurable: true
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+
+    window.RTCPeerConnection.prototype.setRemoteDescription = function () {
+      var _this = this;
+
+      if (!this._ontrackpoly) {
+        this._ontrackpoly = function (e) {
+          // onaddstream does not fire when a track is added to an existing
+          // stream. But stream.onaddtrack is implemented so we use that.
+          e.stream.addEventListener('addtrack', function (te) {
+            var receiver;
+
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === te.track.id;
+              });
+            } else {
+              receiver = {
+                track: te.track
+              };
+            }
+
+            var event = new Event('track');
+            event.track = te.track;
+            event.receiver = receiver;
+            event.transceiver = {
+              receiver: receiver
+            };
+            event.streams = [e.stream];
+
+            _this.dispatchEvent(event);
+          });
+          e.stream.getTracks().forEach(function (track) {
+            var receiver;
+
+            if (window.RTCPeerConnection.prototype.getReceivers) {
+              receiver = _this.getReceivers().find(function (r) {
+                return r.track && r.track.id === track.id;
+              });
+            } else {
+              receiver = {
+                track: track
+              };
+            }
+
+            var event = new Event('track');
+            event.track = track;
+            event.receiver = receiver;
+            event.transceiver = {
+              receiver: receiver
+            };
+            event.streams = [e.stream];
+
+            _this.dispatchEvent(event);
+          });
+        };
+
+        this.addEventListener('addstream', this._ontrackpoly);
+      }
+
+      return origSetRemoteDescription.apply(this, arguments);
+    };
+  } else {
+    // even if RTCRtpTransceiver is in window, it is only used and
+    // emitted in unified-plan. Unfortunately this means we need
+    // to unconditionally wrap the event.
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      if (!e.transceiver) {
+        Object.defineProperty(e, 'transceiver', {
+          value: {
+            receiver: e.receiver
+          }
+        });
+      }
+
+      return e;
+    });
+  }
+}
+
+function shimGetSendersWithDtmf(window) {
+  // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.
+  if (_typeof(window) === 'object' && window.RTCPeerConnection && !('getSenders' in window.RTCPeerConnection.prototype) && 'createDTMFSender' in window.RTCPeerConnection.prototype) {
+    var shimSenderWithDtmf = function shimSenderWithDtmf(pc, track) {
+      return {
+        track: track,
+
+        get dtmf() {
+          if (this._dtmf === undefined) {
+            if (track.kind === 'audio') {
+              this._dtmf = pc.createDTMFSender(track);
+            } else {
+              this._dtmf = null;
+            }
+          }
+
+          return this._dtmf;
+        },
+
+        _pc: pc
+      };
+    }; // augment addTrack when getSenders is not available.
+
+
+    if (!window.RTCPeerConnection.prototype.getSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function () {
+        this._senders = this._senders || [];
+        return this._senders.slice(); // return a copy of the internal state.
+      };
+
+      var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+
+      window.RTCPeerConnection.prototype.addTrack = function (track, stream) {
+        var sender = origAddTrack.apply(this, arguments);
+
+        if (!sender) {
+          sender = shimSenderWithDtmf(this, track);
+
+          this._senders.push(sender);
+        }
+
+        return sender;
+      };
+
+      var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+
+      window.RTCPeerConnection.prototype.removeTrack = function (sender) {
+        origRemoveTrack.apply(this, arguments);
+
+        var idx = this._senders.indexOf(sender);
+
+        if (idx !== -1) {
+          this._senders.splice(idx, 1);
+        }
+      };
+    }
+
+    var origAddStream = window.RTCPeerConnection.prototype.addStream;
+
+    window.RTCPeerConnection.prototype.addStream = function (stream) {
+      var _this2 = this;
+
+      this._senders = this._senders || [];
+      origAddStream.apply(this, [stream]);
+      stream.getTracks().forEach(function (track) {
+        _this2._senders.push(shimSenderWithDtmf(_this2, track));
+      });
+    };
+
+    var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+
+    window.RTCPeerConnection.prototype.removeStream = function (stream) {
+      var _this3 = this;
+
+      this._senders = this._senders || [];
+      origRemoveStream.apply(this, [stream]);
+      stream.getTracks().forEach(function (track) {
+        var sender = _this3._senders.find(function (s) {
+          return s.track === track;
+        });
+
+        if (sender) {
+          // remove sender
+          _this3._senders.splice(_this3._senders.indexOf(sender), 1);
+        }
+      });
+    };
+  } else if (_typeof(window) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+
+    window.RTCPeerConnection.prototype.getSenders = function () {
+      var _this4 = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this4;
+      });
+      return senders;
+    };
+
+    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
+      get: function get() {
+        if (this._dtmf === undefined) {
+          if (this.track.kind === 'audio') {
+            this._dtmf = this._pc.createDTMFSender(this.track);
+          } else {
+            this._dtmf = null;
+          }
+        }
+
+        return this._dtmf;
+      }
+    });
+  }
+}
+
+function shimSenderReceiverGetStats(window) {
+  if (!(_typeof(window) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {
+    return;
+  } // shim sender stats.
+
+
+  if (!('getStats' in window.RTCRtpSender.prototype)) {
+    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+
+    if (origGetSenders) {
+      window.RTCPeerConnection.prototype.getSenders = function () {
+        var _this5 = this;
+
+        var senders = origGetSenders.apply(this, []);
+        senders.forEach(function (sender) {
+          return sender._pc = _this5;
+        });
+        return senders;
+      };
+    }
+
+    var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+
+    if (origAddTrack) {
+      window.RTCPeerConnection.prototype.addTrack = function () {
+        var sender = origAddTrack.apply(this, arguments);
+        sender._pc = this;
+        return sender;
+      };
+    }
+
+    window.RTCRtpSender.prototype.getStats = function () {
+      var sender = this;
+      return this._pc.getStats().then(function (result) {
+        return (
+          /* Note: this will include stats of all senders that
+           *   send a track with the same id as sender.track as
+           *   it is not possible to identify the RTCRtpSender.
+           */
+          filterStats(result, sender.track, true)
+        );
+      });
+    };
+  } // shim receiver stats.
+
+
+  if (!('getStats' in window.RTCRtpReceiver.prototype)) {
+    var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+
+    if (origGetReceivers) {
+      window.RTCPeerConnection.prototype.getReceivers = function () {
+        var _this6 = this;
+
+        var receivers = origGetReceivers.apply(this, []);
+        receivers.forEach(function (receiver) {
+          return receiver._pc = _this6;
+        });
+        return receivers;
+      };
+    }
+
+    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+      e.receiver._pc = e.srcElement;
+      return e;
+    });
+
+    window.RTCRtpReceiver.prototype.getStats = function () {
+      var receiver = this;
+      return this._pc.getStats().then(function (result) {
+        return filterStats(result, receiver.track, false);
+      });
+    };
+  }
+
+  if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {
+    return;
+  } // shim RTCPeerConnection.getStats(track).
+
+
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+
+  window.RTCPeerConnection.prototype.getStats = function () {
+    if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {
+      var track = arguments[0];
+      var sender;
+      var receiver;
+      var err;
+      this.getSenders().forEach(function (s) {
+        if (s.track === track) {
+          if (sender) {
+            err = true;
+          } else {
+            sender = s;
+          }
+        }
+      });
+      this.getReceivers().forEach(function (r) {
+        if (r.track === track) {
+          if (receiver) {
+            err = true;
+          } else {
+            receiver = r;
+          }
+        }
+
+        return r.track === track;
+      });
+
+      if (err || sender && receiver) {
+        return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));
+      } else if (sender) {
+        return sender.getStats();
+      } else if (receiver) {
+        return receiver.getStats();
+      }
+
+      return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));
+    }
+
+    return origGetStats.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrackWithNative(window) {
+  // shim addTrack/removeTrack with native variants in order to make
+  // the interactions with legacy getLocalStreams behave as in other browsers.
+  // Keeps a mapping stream.id => [stream, rtpsenders...]
+  window.RTCPeerConnection.prototype.getLocalStreams = function () {
+    var _this7 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    return Object.keys(this._shimmedLocalStreams).map(function (streamId) {
+      return _this7._shimmedLocalStreams[streamId][0];
+    });
+  };
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+
+  window.RTCPeerConnection.prototype.addTrack = function (track, stream) {
+    if (!stream) {
+      return origAddTrack.apply(this, arguments);
+    }
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    var sender = origAddTrack.apply(this, arguments);
+
+    if (!this._shimmedLocalStreams[stream.id]) {
+      this._shimmedLocalStreams[stream.id] = [stream, sender];
+    } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
+      this._shimmedLocalStreams[stream.id].push(sender);
+    }
+
+    return sender;
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+
+  window.RTCPeerConnection.prototype.addStream = function (stream) {
+    var _this8 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this8.getSenders().find(function (s) {
+        return s.track === track;
+      });
+
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    });
+    var existingSenders = this.getSenders();
+    origAddStream.apply(this, arguments);
+    var newSenders = this.getSenders().filter(function (newSender) {
+      return existingSenders.indexOf(newSender) === -1;
+    });
+    this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+
+  window.RTCPeerConnection.prototype.removeStream = function (stream) {
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+    delete this._shimmedLocalStreams[stream.id];
+    return origRemoveStream.apply(this, arguments);
+  };
+
+  var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
+
+  window.RTCPeerConnection.prototype.removeTrack = function (sender) {
+    var _this9 = this;
+
+    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
+
+    if (sender) {
+      Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {
+        var idx = _this9._shimmedLocalStreams[streamId].indexOf(sender);
+
+        if (idx !== -1) {
+          _this9._shimmedLocalStreams[streamId].splice(idx, 1);
+        }
+
+        if (_this9._shimmedLocalStreams[streamId].length === 1) {
+          delete _this9._shimmedLocalStreams[streamId];
+        }
+      });
+    }
+
+    return origRemoveTrack.apply(this, arguments);
+  };
+}
+
+function shimAddTrackRemoveTrack(window) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var browserDetails = utils.detectBrowser(window); // shim addTrack and removeTrack.
+
+  if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {
+    return shimAddTrackRemoveTrackWithNative(window);
+  } // also shim pc.getLocalStreams when addTrack is shimmed
+  // to return the original streams.
+
+
+  var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;
+
+  window.RTCPeerConnection.prototype.getLocalStreams = function () {
+    var _this10 = this;
+
+    var nativeStreams = origGetLocalStreams.apply(this);
+    this._reverseStreams = this._reverseStreams || {};
+    return nativeStreams.map(function (stream) {
+      return _this10._reverseStreams[stream.id];
+    });
+  };
+
+  var origAddStream = window.RTCPeerConnection.prototype.addStream;
+
+  window.RTCPeerConnection.prototype.addStream = function (stream) {
+    var _this11 = this;
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+    stream.getTracks().forEach(function (track) {
+      var alreadyExists = _this11.getSenders().find(function (s) {
+        return s.track === track;
+      });
+
+      if (alreadyExists) {
+        throw new DOMException('Track already exists.', 'InvalidAccessError');
+      }
+    }); // Add identity mapping for consistency with addTrack.
+    // Unless this is being used with a stream from addTrack.
+
+    if (!this._reverseStreams[stream.id]) {
+      var newStream = new window.MediaStream(stream.getTracks());
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      stream = newStream;
+    }
+
+    origAddStream.apply(this, [stream]);
+  };
+
+  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
+
+  window.RTCPeerConnection.prototype.removeStream = function (stream) {
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+    origRemoveStream.apply(this, [this._streams[stream.id] || stream]);
+    delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];
+    delete this._streams[stream.id];
+  };
+
+  window.RTCPeerConnection.prototype.addTrack = function (track, stream) {
+    var _this12 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    }
+
+    var streams = [].slice.call(arguments, 1);
+
+    if (streams.length !== 1 || !streams[0].getTracks().find(function (t) {
+      return t === track;
+    })) {
+      // this is not fully correct but all we can manage without
+      // [[associated MediaStreams]] internal slot.
+      throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');
+    }
+
+    var alreadyExists = this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+
+    if (alreadyExists) {
+      throw new DOMException('Track already exists.', 'InvalidAccessError');
+    }
+
+    this._streams = this._streams || {};
+    this._reverseStreams = this._reverseStreams || {};
+    var oldStream = this._streams[stream.id];
+
+    if (oldStream) {
+      // this is using odd Chrome behaviour, use with caution:
+      // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
+      // Note: we rely on the high-level addTrack/dtmf shim to
+      // create the sender with a dtmf sender.
+      oldStream.addTrack(track); // Trigger ONN async.
+
+      Promise.resolve().then(function () {
+        _this12.dispatchEvent(new Event('negotiationneeded'));
+      });
+    } else {
+      var newStream = new window.MediaStream([track]);
+      this._streams[stream.id] = newStream;
+      this._reverseStreams[newStream.id] = stream;
+      this.addStream(newStream);
+    }
+
+    return this.getSenders().find(function (s) {
+      return s.track === track;
+    });
+  }; // replace the internal stream id with the external one and
+  // vice versa.
+
+
+  function replaceInternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+
+  function replaceExternalStreamId(pc, description) {
+    var sdp = description.sdp;
+    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
+      var externalStream = pc._reverseStreams[internalId];
+      var internalStream = pc._streams[externalStream.id];
+      sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);
+    });
+    return new RTCSessionDescription({
+      type: description.type,
+      sdp: sdp
+    });
+  }
+
+  ['createOffer', 'createAnswer'].forEach(function (method) {
+    var nativeMethod = window.RTCPeerConnection.prototype[method];
+
+    window.RTCPeerConnection.prototype[method] = function () {
+      var _this13 = this;
+
+      var args = arguments;
+      var isLegacyCall = arguments.length && typeof arguments[0] === 'function';
+
+      if (isLegacyCall) {
+        return nativeMethod.apply(this, [function (description) {
+          var desc = replaceInternalStreamId(_this13, description);
+          args[0].apply(null, [desc]);
+        }, function (err) {
+          if (args[1]) {
+            args[1].apply(null, err);
+          }
+        }, arguments[2]]);
+      }
+
+      return nativeMethod.apply(this, arguments).then(function (description) {
+        return replaceInternalStreamId(_this13, description);
+      });
+    };
+  });
+  var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
+
+  window.RTCPeerConnection.prototype.setLocalDescription = function () {
+    if (!arguments.length || !arguments[0].type) {
+      return origSetLocalDescription.apply(this, arguments);
+    }
+
+    arguments[0] = replaceExternalStreamId(this, arguments[0]);
+    return origSetLocalDescription.apply(this, arguments);
+  }; // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier
+
+
+  var origLocalDescription = Object.getOwnPropertyDescriptor(window.RTCPeerConnection.prototype, 'localDescription');
+  Object.defineProperty(window.RTCPeerConnection.prototype, 'localDescription', {
+    get: function get() {
+      var description = origLocalDescription.get.apply(this);
+
+      if (description.type === '') {
+        return description;
+      }
+
+      return replaceInternalStreamId(this, description);
+    }
+  });
+
+  window.RTCPeerConnection.prototype.removeTrack = function (sender) {
+    var _this14 = this;
+
+    if (this.signalingState === 'closed') {
+      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
+    } // We can not yet check for sender instanceof RTCRtpSender
+    // since we shim RTPSender. So we check if sender._pc is set.
+
+
+    if (!sender._pc) {
+      throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');
+    }
+
+    var isLocal = sender._pc === this;
+
+    if (!isLocal) {
+      throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');
+    } // Search for the native stream the senders track belongs to.
+
+
+    this._streams = this._streams || {};
+    var stream;
+    Object.keys(this._streams).forEach(function (streamid) {
+      var hasTrack = _this14._streams[streamid].getTracks().find(function (track) {
+        return sender.track === track;
+      });
+
+      if (hasTrack) {
+        stream = _this14._streams[streamid];
+      }
+    });
+
+    if (stream) {
+      if (stream.getTracks().length === 1) {
+        // if this is the last track of the stream, remove the stream. This
+        // takes care of any shimmed _senders.
+        this.removeStream(this._reverseStreams[stream.id]);
+      } else {
+        // relying on the same odd chrome behaviour as above.
+        stream.removeTrack(sender.track);
+      }
+
+      this.dispatchEvent(new Event('negotiationneeded'));
+    }
+  };
+}
+
+function shimPeerConnection(window) {
+  if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.webkitRTCPeerConnection;
+  }
+
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var origGetStats = window.RTCPeerConnection.prototype.getStats;
+
+  window.RTCPeerConnection.prototype.getStats = function (selector, successCallback, errorCallback) {
+    var _this15 = this;
+
+    var args = arguments; // If selector is a function then we are in the old style stats so just
+    // pass back the original getStats format to avoid breaking old users.
+
+    if (arguments.length > 0 && typeof selector === 'function') {
+      return origGetStats.apply(this, arguments);
+    } // When spec-style getStats is supported, return those when called with
+    // either no arguments or the selector argument is null.
+
+
+    if (origGetStats.length === 0 && (arguments.length === 0 || typeof arguments[0] !== 'function')) {
+      return origGetStats.apply(this, []);
+    }
+
+    var fixChromeStats_ = function fixChromeStats_(response) {
+      var standardReport = {};
+      var reports = response.result();
+      reports.forEach(function (report) {
+        var standardStats = {
+          id: report.id,
+          timestamp: report.timestamp,
+          type: {
+            localcandidate: 'local-candidate',
+            remotecandidate: 'remote-candidate'
+          }[report.type] || report.type
+        };
+        report.names().forEach(function (name) {
+          standardStats[name] = report.stat(name);
+        });
+        standardReport[standardStats.id] = standardStats;
+      });
+      return standardReport;
+    }; // shim getStats with maplike support
+
+
+    var makeMapStats = function makeMapStats(stats) {
+      return new Map(Object.keys(stats).map(function (key) {
+        return [key, stats[key]];
+      }));
+    };
+
+    if (arguments.length >= 2) {
+      var successCallbackWrapper_ = function successCallbackWrapper_(response) {
+        args[1](makeMapStats(fixChromeStats_(response)));
+      };
+
+      return origGetStats.apply(this, [successCallbackWrapper_, arguments[0]]);
+    } // promise-support
+
+
+    return new Promise(function (resolve, reject) {
+      origGetStats.apply(_this15, [function (response) {
+        resolve(makeMapStats(fixChromeStats_(response)));
+      }, reject]);
+    }).then(successCallback, errorCallback);
+  }; // shim implicit creation of RTCSessionDescription/RTCIceCandidate
+
+
+  ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+    var nativeMethod = window.RTCPeerConnection.prototype[method];
+
+    window.RTCPeerConnection.prototype[method] = function () {
+      arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+      return nativeMethod.apply(this, arguments);
+    };
+  }); // support for addIceCandidate(null or undefined)
+
+  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
+
+  window.RTCPeerConnection.prototype.addIceCandidate = function () {
+    if (!arguments[0]) {
+      if (arguments[1]) {
+        arguments[1].apply(null);
+      }
+
+      return Promise.resolve();
+    }
+
+    return nativeAddIceCandidate.apply(this, arguments);
+  };
+}
+
+function fixNegotiationNeeded(window) {
+  utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function (e) {
+    var pc = e.target;
+
+    if (pc.signalingState !== 'stable') {
+      return;
+    }
+
+    return e;
+  });
+}
+
+},{"../utils.js":29,"./getdisplaymedia":18,"./getusermedia":19}],18:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+
+function shimGetDisplayMedia(window, getSourceId) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+
+  if (!window.navigator.mediaDevices) {
+    return;
+  } // getSourceId is a function that returns a promise resolving with
+  // the sourceId of the screen/window/tab to be shared.
+
+
+  if (typeof getSourceId !== 'function') {
+    console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');
+    return;
+  }
+
+  window.navigator.mediaDevices.getDisplayMedia = function (constraints) {
+    return getSourceId(constraints).then(function (sourceId) {
+      var widthSpecified = constraints.video && constraints.video.width;
+      var heightSpecified = constraints.video && constraints.video.height;
+      var frameRateSpecified = constraints.video && constraints.video.frameRate;
+      constraints.video = {
+        mandatory: {
+          chromeMediaSource: 'desktop',
+          chromeMediaSourceId: sourceId,
+          maxFrameRate: frameRateSpecified || 3
+        }
+      };
+
+      if (widthSpecified) {
+        constraints.video.mandatory.maxWidth = widthSpecified;
+      }
+
+      if (heightSpecified) {
+        constraints.video.mandatory.maxHeight = heightSpecified;
+      }
+
+      return window.navigator.mediaDevices.getUserMedia(constraints);
+    });
+  };
+}
+
+},{}],19:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var utils = _interopRequireWildcard(require("../utils.js"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+var logging = utils.log;
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  if (!navigator.mediaDevices) {
+    return;
+  }
+
+  var browserDetails = utils.detectBrowser(window);
+
+  var constraintsToChrome_ = function constraintsToChrome_(c) {
+    if (_typeof(c) !== 'object' || c.mandatory || c.optional) {
+      return c;
+    }
+
+    var cc = {};
+    Object.keys(c).forEach(function (key) {
+      if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
+        return;
+      }
+
+      var r = _typeof(c[key]) === 'object' ? c[key] : {
+        ideal: c[key]
+      };
+
+      if (r.exact !== undefined && typeof r.exact === 'number') {
+        r.min = r.max = r.exact;
+      }
+
+      var oldname_ = function oldname_(prefix, name) {
+        if (prefix) {
+          return prefix + name.charAt(0).toUpperCase() + name.slice(1);
+        }
+
+        return name === 'deviceId' ? 'sourceId' : name;
+      };
+
+      if (r.ideal !== undefined) {
+        cc.optional = cc.optional || [];
+        var oc = {};
+
+        if (typeof r.ideal === 'number') {
+          oc[oldname_('min', key)] = r.ideal;
+          cc.optional.push(oc);
+          oc = {};
+          oc[oldname_('max', key)] = r.ideal;
+          cc.optional.push(oc);
+        } else {
+          oc[oldname_('', key)] = r.ideal;
+          cc.optional.push(oc);
+        }
+      }
+
+      if (r.exact !== undefined && typeof r.exact !== 'number') {
+        cc.mandatory = cc.mandatory || {};
+        cc.mandatory[oldname_('', key)] = r.exact;
+      } else {
+        ['min', 'max'].forEach(function (mix) {
+          if (r[mix] !== undefined) {
+            cc.mandatory = cc.mandatory || {};
+            cc.mandatory[oldname_(mix, key)] = r[mix];
+          }
+        });
+      }
+    });
+
+    if (c.advanced) {
+      cc.optional = (cc.optional || []).concat(c.advanced);
+    }
+
+    return cc;
+  };
+
+  var shimConstraints_ = function shimConstraints_(constraints, func) {
+    if (browserDetails.version >= 61) {
+      return func(constraints);
+    }
+
+    constraints = JSON.parse(JSON.stringify(constraints));
+
+    if (constraints && _typeof(constraints.audio) === 'object') {
+      var remap = function remap(obj, a, b) {
+        if (a in obj && !(b in obj)) {
+          obj[b] = obj[a];
+          delete obj[a];
+        }
+      };
+
+      constraints = JSON.parse(JSON.stringify(constraints));
+      remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');
+      remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');
+      constraints.audio = constraintsToChrome_(constraints.audio);
+    }
+
+    if (constraints && _typeof(constraints.video) === 'object') {
+      // Shim facingMode for mobile & surface pro.
+      var face = constraints.video.facingMode;
+      face = face && (_typeof(face) === 'object' ? face : {
+        ideal: face
+      });
+      var getSupportedFacingModeLies = browserDetails.version < 66;
+
+      if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {
+        delete constraints.video.facingMode;
+        var matches;
+
+        if (face.exact === 'environment' || face.ideal === 'environment') {
+          matches = ['back', 'rear'];
+        } else if (face.exact === 'user' || face.ideal === 'user') {
+          matches = ['front'];
+        }
+
+        if (matches) {
+          // Look for matches in label, or use last cam for back (typical).
+          return navigator.mediaDevices.enumerateDevices().then(function (devices) {
+            devices = devices.filter(function (d) {
+              return d.kind === 'videoinput';
+            });
+            var dev = devices.find(function (d) {
+              return matches.some(function (match) {
+                return d.label.toLowerCase().includes(match);
+              });
+            });
+
+            if (!dev && devices.length && matches.includes('back')) {
+              dev = devices[devices.length - 1]; // more likely the back cam
+            }
+
+            if (dev) {
+              constraints.video.deviceId = face.exact ? {
+                exact: dev.deviceId
+              } : {
+                ideal: dev.deviceId
+              };
+            }
+
+            constraints.video = constraintsToChrome_(constraints.video);
+            logging('chrome: ' + JSON.stringify(constraints));
+            return func(constraints);
+          });
+        }
+      }
+
+      constraints.video = constraintsToChrome_(constraints.video);
+    }
+
+    logging('chrome: ' + JSON.stringify(constraints));
+    return func(constraints);
+  };
+
+  var shimError_ = function shimError_(e) {
+    if (browserDetails.version >= 64) {
+      return e;
+    }
+
+    return {
+      name: {
+        PermissionDeniedError: 'NotAllowedError',
+        PermissionDismissedError: 'NotAllowedError',
+        InvalidStateError: 'NotAllowedError',
+        DevicesNotFoundError: 'NotFoundError',
+        ConstraintNotSatisfiedError: 'OverconstrainedError',
+        TrackStartError: 'NotReadableError',
+        MediaDeviceFailedDueToShutdown: 'NotAllowedError',
+        MediaDeviceKillSwitchOn: 'NotAllowedError',
+        TabCaptureError: 'AbortError',
+        ScreenCaptureError: 'AbortError',
+        DeviceCaptureError: 'AbortError'
+      }[e.name] || e.name,
+      message: e.message,
+      constraint: e.constraint || e.constraintName,
+      toString: function toString() {
+        return this.name + (this.message && ': ') + this.message;
+      }
+    };
+  };
+
+  var getUserMedia_ = function getUserMedia_(constraints, onSuccess, onError) {
+    shimConstraints_(constraints, function (c) {
+      navigator.webkitGetUserMedia(c, onSuccess, function (e) {
+        if (onError) {
+          onError(shimError_(e));
+        }
+      });
+    });
+  };
+
+  navigator.getUserMedia = getUserMedia_.bind(navigator); // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
+  // function which returns a Promise, it does not accept spec-style
+  // constraints.
+
+  var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+
+  navigator.mediaDevices.getUserMedia = function (cs) {
+    return shimConstraints_(cs, function (c) {
+      return origGetUserMedia(c).then(function (stream) {
+        if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {
+          stream.getTracks().forEach(function (track) {
+            track.stop();
+          });
+          throw new DOMException('', 'NotFoundError');
+        }
+
+        return stream;
+      }, function (e) {
+        return Promise.reject(shimError_(e));
+      });
+    });
+  };
+}
+
+},{"../utils.js":29}],20:[function(require,module,exports){
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimRTCIceCandidate = shimRTCIceCandidate;
+exports.shimMaxMessageSize = shimMaxMessageSize;
+exports.shimSendThrowTypeError = shimSendThrowTypeError;
+exports.shimConnectionState = shimConnectionState;
+exports.removeAllowExtmapMixed = removeAllowExtmapMixed;
+
+var _sdp = _interopRequireDefault(require("sdp"));
+
+var utils = _interopRequireWildcard(require("./utils"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function shimRTCIceCandidate(window) {
+  // foundation is arbitrarily chosen as an indicator for full support for
+  // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
+  if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {
+    return;
+  }
+
+  var NativeRTCIceCandidate = window.RTCIceCandidate;
+
+  window.RTCIceCandidate = function (args) {
+    // Remove the a= which shouldn't be part of the candidate string.
+    if (_typeof(args) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {
+      args = JSON.parse(JSON.stringify(args));
+      args.candidate = args.candidate.substr(2);
+    }
+
+    if (args.candidate && args.candidate.length) {
+      // Augment the native candidate with the parsed fields.
+      var nativeCandidate = new NativeRTCIceCandidate(args);
+
+      var parsedCandidate = _sdp.default.parseCandidate(args.candidate);
+
+      var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate); // Add a serializer that does not serialize the extra attributes.
+
+      augmentedCandidate.toJSON = function () {
+        return {
+          candidate: augmentedCandidate.candidate,
+          sdpMid: augmentedCandidate.sdpMid,
+          sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
+          usernameFragment: augmentedCandidate.usernameFragment
+        };
+      };
+
+      return augmentedCandidate;
+    }
+
+    return new NativeRTCIceCandidate(args);
+  };
+
+  window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype; // Hook up the augmented candidate in onicecandidate and
+  // addEventListener('icecandidate', ...)
+
+  utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {
+    if (e.candidate) {
+      Object.defineProperty(e, 'candidate', {
+        value: new window.RTCIceCandidate(e.candidate),
+        writable: 'false'
+      });
+    }
+
+    return e;
+  });
+}
+
+function shimMaxMessageSize(window) {
+  if (window.RTCSctpTransport || !window.RTCPeerConnection) {
+    return;
+  }
+
+  var browserDetails = utils.detectBrowser(window);
+
+  if (!('sctp' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
+      get: function get() {
+        return typeof this._sctp === 'undefined' ? null : this._sctp;
+      }
+    });
+  }
+
+  var sctpInDescription = function sctpInDescription(description) {
+    var sections = _sdp.default.splitSections(description.sdp);
+
+    sections.shift();
+    return sections.some(function (mediaSection) {
+      var mLine = _sdp.default.parseMLine(mediaSection);
+
+      return mLine && mLine.kind === 'application' && mLine.protocol.indexOf('SCTP') !== -1;
+    });
+  };
+
+  var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {
+    // TODO: Is there a better solution for detecting Firefox?
+    var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
+
+    if (match === null || match.length < 2) {
+      return -1;
+    }
+
+    var version = parseInt(match[1], 10); // Test for NaN (yes, this is ugly)
+
+    return version !== version ? -1 : version;
+  };
+
+  var getCanSendMaxMessageSize = function getCanSendMaxMessageSize(remoteIsFirefox) {
+    // Every implementation we know can send at least 64 KiB.
+    // Note: Although Chrome is technically able to send up to 256 KiB, the
+    //       data does not reach the other peer reliably.
+    //       See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419
+    var canSendMaxMessageSize = 65536;
+
+    if (browserDetails.browser === 'firefox') {
+      if (browserDetails.version < 57) {
+        if (remoteIsFirefox === -1) {
+          // FF < 57 will send in 16 KiB chunks using the deprecated PPID
+          // fragmentation.
+          canSendMaxMessageSize = 16384;
+        } else {
+          // However, other FF (and RAWRTC) can reassemble PPID-fragmented
+          // messages. Thus, supporting ~2 GiB when sending.
+          canSendMaxMessageSize = 2147483637;
+        }
+      } else if (browserDetails.version < 60) {
+        // Currently, all FF >= 57 will reset the remote maximum message size
+        // to the default value when a data channel is created at a later
+        // stage. :(
+        // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+        canSendMaxMessageSize = browserDetails.version === 57 ? 65535 : 65536;
+      } else {
+        // FF >= 60 supports sending ~2 GiB
+        canSendMaxMessageSize = 2147483637;
+      }
+    }
+
+    return canSendMaxMessageSize;
+  };
+
+  var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {
+    // Note: 65536 bytes is the default value from the SDP spec. Also,
+    //       every implementation we know supports receiving 65536 bytes.
+    var maxMessageSize = 65536; // FF 57 has a slightly incorrect default remote max message size, so
+    // we need to adjust it here to avoid a failure when sending.
+    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
+
+    if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {
+      maxMessageSize = 65535;
+    }
+
+    var match = _sdp.default.matchPrefix(description.sdp, 'a=max-message-size:');
+
+    if (match.length > 0) {
+      maxMessageSize = parseInt(match[0].substr(19), 10);
+    } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {
+      // If the maximum message size is not present in the remote SDP and
+      // both local and remote are Firefox, the remote peer can receive
+      // ~2 GiB.
+      maxMessageSize = 2147483637;
+    }
+
+    return maxMessageSize;
+  };
+
+  var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+
+  window.RTCPeerConnection.prototype.setRemoteDescription = function () {
+    this._sctp = null;
+
+    if (sctpInDescription(arguments[0])) {
+      // Check if the remote is FF.
+      var isFirefox = getRemoteFirefoxVersion(arguments[0]); // Get the maximum message size the local peer is capable of sending
+
+      var canSendMMS = getCanSendMaxMessageSize(isFirefox); // Get the maximum message size of the remote peer.
+
+      var remoteMMS = getMaxMessageSize(arguments[0], isFirefox); // Determine final maximum message size
+
+      var maxMessageSize;
+
+      if (canSendMMS === 0 && remoteMMS === 0) {
+        maxMessageSize = Number.POSITIVE_INFINITY;
+      } else if (canSendMMS === 0 || remoteMMS === 0) {
+        maxMessageSize = Math.max(canSendMMS, remoteMMS);
+      } else {
+        maxMessageSize = Math.min(canSendMMS, remoteMMS);
+      } // Create a dummy RTCSctpTransport object and the 'maxMessageSize'
+      // attribute.
+
+
+      var sctp = {};
+      Object.defineProperty(sctp, 'maxMessageSize', {
+        get: function get() {
+          return maxMessageSize;
+        }
+      });
+      this._sctp = sctp;
+    }
+
+    return origSetRemoteDescription.apply(this, arguments);
+  };
+}
+
+function shimSendThrowTypeError(window) {
+  if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {
+    return;
+  } // Note: Although Firefox >= 57 has a native implementation, the maximum
+  //       message size can be reset for all data channels at a later stage.
+  //       See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
+
+
+  function wrapDcSend(dc, pc) {
+    var origDataChannelSend = dc.send;
+
+    dc.send = function () {
+      var data = arguments[0];
+      var length = data.length || data.size || data.byteLength;
+
+      if (dc.readyState === 'open' && pc.sctp && length > pc.sctp.maxMessageSize) {
+        throw new TypeError('Message too large (can send a maximum of ' + pc.sctp.maxMessageSize + ' bytes)');
+      }
+
+      return origDataChannelSend.apply(dc, arguments);
+    };
+  }
+
+  var origCreateDataChannel = window.RTCPeerConnection.prototype.createDataChannel;
+
+  window.RTCPeerConnection.prototype.createDataChannel = function () {
+    var dataChannel = origCreateDataChannel.apply(this, arguments);
+    wrapDcSend(dataChannel, this);
+    return dataChannel;
+  };
+
+  utils.wrapPeerConnectionEvent(window, 'datachannel', function (e) {
+    wrapDcSend(e.channel, e.target);
+    return e;
+  });
+}
+/* shims RTCConnectionState by pretending it is the same as iceConnectionState.
+ * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12
+ * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect
+ * since DTLS failures would be hidden. See
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827
+ * for the Firefox tracking bug.
+ */
+
+
+function shimConnectionState(window) {
+  if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+
+  var proto = window.RTCPeerConnection.prototype;
+  Object.defineProperty(proto, 'connectionState', {
+    get: function get() {
+      return {
+        completed: 'connected',
+        checking: 'connecting'
+      }[this.iceConnectionState] || this.iceConnectionState;
+    },
+    enumerable: true,
+    configurable: true
+  });
+  Object.defineProperty(proto, 'onconnectionstatechange', {
+    get: function get() {
+      return this._onconnectionstatechange || null;
+    },
+    set: function set(cb) {
+      if (this._onconnectionstatechange) {
+        this.removeEventListener('connectionstatechange', this._onconnectionstatechange);
+        delete this._onconnectionstatechange;
+      }
+
+      if (cb) {
+        this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);
+      }
+    },
+    enumerable: true,
+    configurable: true
+  });
+  ['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {
+    var origMethod = proto[method];
+
+    proto[method] = function () {
+      if (!this._connectionstatechangepoly) {
+        this._connectionstatechangepoly = function (e) {
+          var pc = e.target;
+
+          if (pc._lastConnectionState !== pc.connectionState) {
+            pc._lastConnectionState = pc.connectionState;
+            var newEvent = new Event('connectionstatechange', e);
+            pc.dispatchEvent(newEvent);
+          }
+
+          return e;
+        };
+
+        this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);
+      }
+
+      return origMethod.apply(this, arguments);
+    };
+  });
+}
+
+function removeAllowExtmapMixed(window) {
+  /* remove a=extmap-allow-mixed for Chrome < M71 */
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var browserDetails = utils.detectBrowser(window);
+
+  if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {
+    return;
+  }
+
+  var nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;
+
+  window.RTCPeerConnection.prototype.setRemoteDescription = function (desc) {
+    if (desc && desc.sdp && desc.sdp.indexOf('\na=extmap-allow-mixed') !== -1) {
+      desc.sdp = desc.sdp.split('\n').filter(function (line) {
+        return line.trim() !== 'a=extmap-allow-mixed';
+      }).join('\n');
+    }
+
+    return nativeSRD.apply(this, arguments);
+  };
+}
+
+},{"./utils":29,"sdp":14}],21:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimPeerConnection = shimPeerConnection;
+exports.shimReplaceTrack = shimReplaceTrack;
+Object.defineProperty(exports, "shimGetUserMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+Object.defineProperty(exports, "shimGetDisplayMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+
+var utils = _interopRequireWildcard(require("../utils"));
+
+var _filtericeservers = require("./filtericeservers");
+
+var _rtcpeerconnectionShim = _interopRequireDefault(require("rtcpeerconnection-shim"));
+
+var _getusermedia = require("./getusermedia");
+
+var _getdisplaymedia = require("./getdisplaymedia");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function shimPeerConnection(window) {
+  var browserDetails = utils.detectBrowser(window);
+
+  if (window.RTCIceGatherer) {
+    if (!window.RTCIceCandidate) {
+      window.RTCIceCandidate = function (args) {
+        return args;
+      };
+    }
+
+    if (!window.RTCSessionDescription) {
+      window.RTCSessionDescription = function (args) {
+        return args;
+      };
+    } // this adds an additional event listener to MediaStrackTrack that signals
+    // when a tracks enabled property was changed. Workaround for a bug in
+    // addStream, see below. No longer required in 15025+
+
+
+    if (browserDetails.version < 15025) {
+      var origMSTEnabled = Object.getOwnPropertyDescriptor(window.MediaStreamTrack.prototype, 'enabled');
+      Object.defineProperty(window.MediaStreamTrack.prototype, 'enabled', {
+        set: function set(value) {
+          origMSTEnabled.set.call(this, value);
+          var ev = new Event('enabled');
+          ev.enabled = value;
+          this.dispatchEvent(ev);
+        }
+      });
+    }
+  } // ORTC defines the DTMF sender a bit different.
+  // https://github.com/w3c/ortc/issues/714
+
+
+  if (window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
+    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
+      get: function get() {
+        if (this._dtmf === undefined) {
+          if (this.track.kind === 'audio') {
+            this._dtmf = new window.RTCDtmfSender(this);
+          } else if (this.track.kind === 'video') {
+            this._dtmf = null;
+          }
+        }
+
+        return this._dtmf;
+      }
+    });
+  } // Edge currently only implements the RTCDtmfSender, not the
+  // RTCDTMFSender alias. See http://draft.ortc.org/#rtcdtmfsender2*
+
+
+  if (window.RTCDtmfSender && !window.RTCDTMFSender) {
+    window.RTCDTMFSender = window.RTCDtmfSender;
+  }
+
+  var RTCPeerConnectionShim = (0, _rtcpeerconnectionShim.default)(window, browserDetails.version);
+
+  window.RTCPeerConnection = function (config) {
+    if (config && config.iceServers) {
+      config.iceServers = (0, _filtericeservers.filterIceServers)(config.iceServers, browserDetails.version);
+      utils.log('ICE servers after filtering:', config.iceServers);
+    }
+
+    return new RTCPeerConnectionShim(config);
+  };
+
+  window.RTCPeerConnection.prototype = RTCPeerConnectionShim.prototype;
+}
+
+function shimReplaceTrack(window) {
+  // ORTC has replaceTrack -- https://github.com/w3c/ortc/issues/614
+  if (window.RTCRtpSender && !('replaceTrack' in window.RTCRtpSender.prototype)) {
+    window.RTCRtpSender.prototype.replaceTrack = window.RTCRtpSender.prototype.setTrack;
+  }
+}
+
+},{"../utils":29,"./filtericeservers":22,"./getdisplaymedia":23,"./getusermedia":24,"rtcpeerconnection-shim":13}],22:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.filterIceServers = filterIceServers;
+
+var utils = _interopRequireWildcard(require("../utils"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+// Edge does not like
+// 1) stun: filtered after 14393 unless ?transport=udp is present
+// 2) turn: that does not have all of turn:host:port?transport=udp
+// 3) turn: with ipv6 addresses
+// 4) turn: occurring muliple times
+function filterIceServers(iceServers, edgeVersion) {
+  var hasTurn = false;
+  iceServers = JSON.parse(JSON.stringify(iceServers));
+  return iceServers.filter(function (server) {
+    if (server && (server.urls || server.url)) {
+      var urls = server.urls || server.url;
+
+      if (server.url && !server.urls) {
+        utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
+      }
+
+      var isString = typeof urls === 'string';
+
+      if (isString) {
+        urls = [urls];
+      }
+
+      urls = urls.filter(function (url) {
+        // filter STUN unconditionally.
+        if (url.indexOf('stun:') === 0) {
+          return false;
+        }
+
+        var validTurn = url.startsWith('turn') && !url.startsWith('turn:[') && url.includes('transport=udp');
+
+        if (validTurn && !hasTurn) {
+          hasTurn = true;
+          return true;
+        }
+
+        return validTurn && !hasTurn;
+      });
+      delete server.url;
+      server.urls = isString ? urls[0] : urls;
+      return !!urls.length;
+    }
+  });
+}
+
+},{"../utils":29}],23:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+
+function shimGetDisplayMedia(window) {
+  if (!('getDisplayMedia' in window.navigator)) {
+    return;
+  }
+
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+
+  window.navigator.mediaDevices.getDisplayMedia = window.navigator.getDisplayMedia.bind(window.navigator);
+}
+
+},{}],24:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetUserMedia = shimGetUserMedia;
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  var shimError_ = function shimError_(e) {
+    return {
+      name: {
+        PermissionDeniedError: 'NotAllowedError'
+      }[e.name] || e.name,
+      message: e.message,
+      constraint: e.constraint,
+      toString: function toString() {
+        return this.name;
+      }
+    };
+  }; // getUserMedia error shim.
+
+
+  var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+
+  navigator.mediaDevices.getUserMedia = function (c) {
+    return origGetUserMedia(c).catch(function (e) {
+      return Promise.reject(shimError_(e));
+    });
+  };
+}
+
+},{}],25:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimOnTrack = shimOnTrack;
+exports.shimPeerConnection = shimPeerConnection;
+exports.shimSenderGetStats = shimSenderGetStats;
+exports.shimReceiverGetStats = shimReceiverGetStats;
+exports.shimRemoveStream = shimRemoveStream;
+exports.shimRTCDataChannel = shimRTCDataChannel;
+Object.defineProperty(exports, "shimGetUserMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getusermedia.shimGetUserMedia;
+  }
+});
+Object.defineProperty(exports, "shimGetDisplayMedia", {
+  enumerable: true,
+  get: function get() {
+    return _getdisplaymedia.shimGetDisplayMedia;
+  }
+});
+
+var utils = _interopRequireWildcard(require("../utils"));
+
+var _getusermedia = require("./getusermedia");
+
+var _getdisplaymedia = require("./getdisplaymedia");
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function shimOnTrack(window) {
+  if (_typeof(window) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return {
+          receiver: this.receiver
+        };
+      }
+    });
+  }
+}
+
+function shimPeerConnection(window) {
+  var browserDetails = utils.detectBrowser(window);
+
+  if (_typeof(window) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {
+    return; // probably media.peerconnection.enabled=false in about:config
+  }
+
+  if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {
+    // very basic support for old versions.
+    window.RTCPeerConnection = window.mozRTCPeerConnection;
+  } // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
+
+
+  ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
+    var nativeMethod = window.RTCPeerConnection.prototype[method];
+
+    window.RTCPeerConnection.prototype[method] = function () {
+      arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
+      return nativeMethod.apply(this, arguments);
+    };
+  }); // support for addIceCandidate(null or undefined)
+
+  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
+
+  window.RTCPeerConnection.prototype.addIceCandidate = function () {
+    if (!arguments[0]) {
+      if (arguments[1]) {
+        arguments[1].apply(null);
+      }
+
+      return Promise.resolve();
+    }
+
+    return nativeAddIceCandidate.apply(this, arguments);
+  };
+
+  var modernStatsTypes = {
+    inboundrtp: 'inbound-rtp',
+    outboundrtp: 'outbound-rtp',
+    candidatepair: 'candidate-pair',
+    localcandidate: 'local-candidate',
+    remotecandidate: 'remote-candidate'
+  };
+  var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
+
+  window.RTCPeerConnection.prototype.getStats = function (selector, onSucc, onErr) {
+    return nativeGetStats.apply(this, [selector || null]).then(function (stats) {
+      if (browserDetails.version < 53 && !onSucc) {
+        // Shim only promise getStats with spec-hyphens in type names
+        // Leave callback version alone; misc old uses of forEach before Map
+        try {
+          stats.forEach(function (stat) {
+            stat.type = modernStatsTypes[stat.type] || stat.type;
+          });
+        } catch (e) {
+          if (e.name !== 'TypeError') {
+            throw e;
+          } // Avoid TypeError: "type" is read-only, in old versions. 34-43ish
+
+
+          stats.forEach(function (stat, i) {
+            stats.set(i, Object.assign({}, stat, {
+              type: modernStatsTypes[stat.type] || stat.type
+            }));
+          });
+        }
+      }
+
+      return stats;
+    }).then(onSucc, onErr);
+  };
+}
+
+function shimSenderGetStats(window) {
+  if (!(_typeof(window) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
+    return;
+  }
+
+  var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
+
+  if (origGetSenders) {
+    window.RTCPeerConnection.prototype.getSenders = function () {
+      var _this = this;
+
+      var senders = origGetSenders.apply(this, []);
+      senders.forEach(function (sender) {
+        return sender._pc = _this;
+      });
+      return senders;
+    };
+  }
+
+  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
+
+  if (origAddTrack) {
+    window.RTCPeerConnection.prototype.addTrack = function () {
+      var sender = origAddTrack.apply(this, arguments);
+      sender._pc = this;
+      return sender;
+    };
+  }
+
+  window.RTCRtpSender.prototype.getStats = function () {
+    return this.track ? this._pc.getStats(this.track) : Promise.resolve(new Map());
+  };
+}
+
+function shimReceiverGetStats(window) {
+  if (!(_typeof(window) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
+    return;
+  }
+
+  if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
+    return;
+  }
+
+  var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
+
+  if (origGetReceivers) {
+    window.RTCPeerConnection.prototype.getReceivers = function () {
+      var _this2 = this;
+
+      var receivers = origGetReceivers.apply(this, []);
+      receivers.forEach(function (receiver) {
+        return receiver._pc = _this2;
+      });
+      return receivers;
+    };
+  }
+
+  utils.wrapPeerConnectionEvent(window, 'track', function (e) {
+    e.receiver._pc = e.srcElement;
+    return e;
+  });
+
+  window.RTCRtpReceiver.prototype.getStats = function () {
+    return this._pc.getStats(this.track);
+  };
+}
+
+function shimRemoveStream(window) {
+  if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {
+    return;
+  }
+
+  window.RTCPeerConnection.prototype.removeStream = function (stream) {
+    var _this3 = this;
+
+    utils.deprecated('removeStream', 'removeTrack');
+    this.getSenders().forEach(function (sender) {
+      if (sender.track && stream.getTracks().includes(sender.track)) {
+        _this3.removeTrack(sender);
+      }
+    });
+  };
+}
+
+function shimRTCDataChannel(window) {
+  // rename DataChannel to RTCDataChannel (native fix in FF60):
+  // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
+  if (window.DataChannel && !window.RTCDataChannel) {
+    window.RTCDataChannel = window.DataChannel;
+  }
+}
+
+},{"../utils":29,"./getdisplaymedia":26,"./getusermedia":27}],26:[function(require,module,exports){
+/*
+ *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetDisplayMedia = shimGetDisplayMedia;
+
+function shimGetDisplayMedia(window, preferredMediaSource) {
+  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
+    return;
+  }
+
+  if (!window.navigator.mediaDevices) {
+    return;
+  }
+
+  window.navigator.mediaDevices.getDisplayMedia = function (constraints) {
+    if (!(constraints && constraints.video)) {
+      var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');
+      err.name = 'NotFoundError'; // from https://heycam.github.io/webidl/#idl-DOMException-error-names
+
+      err.code = 8;
+      return Promise.reject(err);
+    }
+
+    if (constraints.video === true) {
+      constraints.video = {
+        mediaSource: preferredMediaSource
+      };
+    } else {
+      constraints.video.mediaSource = preferredMediaSource;
+    }
+
+    return window.navigator.mediaDevices.getUserMedia(constraints);
+  };
+}
+
+},{}],27:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimGetUserMedia = shimGetUserMedia;
+
+var utils = _interopRequireWildcard(require("../utils"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function shimGetUserMedia(window) {
+  var browserDetails = utils.detectBrowser(window);
+  var navigator = window && window.navigator;
+  var MediaStreamTrack = window && window.MediaStreamTrack;
+
+  navigator.getUserMedia = function (constraints, onSuccess, onError) {
+    // Replace Firefox 44+'s deprecation warning with unprefixed version.
+    utils.deprecated('navigator.getUserMedia', 'navigator.mediaDevices.getUserMedia');
+    navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
+  };
+
+  if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
+    var remap = function remap(obj, a, b) {
+      if (a in obj && !(b in obj)) {
+        obj[b] = obj[a];
+        delete obj[a];
+      }
+    };
+
+    var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
+
+    navigator.mediaDevices.getUserMedia = function (c) {
+      if (_typeof(c) === 'object' && _typeof(c.audio) === 'object') {
+        c = JSON.parse(JSON.stringify(c));
+        remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
+        remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
+      }
+
+      return nativeGetUserMedia(c);
+    };
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
+      var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
+
+      MediaStreamTrack.prototype.getSettings = function () {
+        var obj = nativeGetSettings.apply(this, arguments);
+        remap(obj, 'mozAutoGainControl', 'autoGainControl');
+        remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
+        return obj;
+      };
+    }
+
+    if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
+      var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
+
+      MediaStreamTrack.prototype.applyConstraints = function (c) {
+        if (this.kind === 'audio' && _typeof(c) === 'object') {
+          c = JSON.parse(JSON.stringify(c));
+          remap(c, 'autoGainControl', 'mozAutoGainControl');
+          remap(c, 'noiseSuppression', 'mozNoiseSuppression');
+        }
+
+        return nativeApplyConstraints.apply(this, [c]);
+      };
+    }
+  }
+}
+
+},{"../utils":29}],28:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
+exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
+exports.shimCallbacksAPI = shimCallbacksAPI;
+exports.shimGetUserMedia = shimGetUserMedia;
+exports.shimConstraints = shimConstraints;
+exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
+exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
+exports.shimCreateOfferLegacy = shimCreateOfferLegacy;
+
+var utils = _interopRequireWildcard(require("../utils"));
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+function shimLocalStreamsAPI(window) {
+  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+
+  if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getLocalStreams = function () {
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+
+      return this._localStreams;
+    };
+  }
+
+  if (!('addStream' in window.RTCPeerConnection.prototype)) {
+    var _addTrack = window.RTCPeerConnection.prototype.addTrack;
+
+    window.RTCPeerConnection.prototype.addStream = function (stream) {
+      var _this = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+
+      if (!this._localStreams.includes(stream)) {
+        this._localStreams.push(stream);
+      }
+
+      stream.getTracks().forEach(function (track) {
+        return _addTrack.call(_this, track, stream);
+      });
+    };
+
+    window.RTCPeerConnection.prototype.addTrack = function (track, stream) {
+      if (stream) {
+        if (!this._localStreams) {
+          this._localStreams = [stream];
+        } else if (!this._localStreams.includes(stream)) {
+          this._localStreams.push(stream);
+        }
+      }
+
+      return _addTrack.call(this, track, stream);
+    };
+  }
+
+  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.removeStream = function (stream) {
+      var _this2 = this;
+
+      if (!this._localStreams) {
+        this._localStreams = [];
+      }
+
+      var index = this._localStreams.indexOf(stream);
+
+      if (index === -1) {
+        return;
+      }
+
+      this._localStreams.splice(index, 1);
+
+      var tracks = stream.getTracks();
+      this.getSenders().forEach(function (sender) {
+        if (tracks.includes(sender.track)) {
+          _this2.removeTrack(sender);
+        }
+      });
+    };
+  }
+}
+
+function shimRemoteStreamsAPI(window) {
+  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+
+  if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
+    window.RTCPeerConnection.prototype.getRemoteStreams = function () {
+      return this._remoteStreams ? this._remoteStreams : [];
+    };
+  }
+
+  if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
+    Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
+      get: function get() {
+        return this._onaddstream;
+      },
+      set: function set(f) {
+        var _this3 = this;
+
+        if (this._onaddstream) {
+          this.removeEventListener('addstream', this._onaddstream);
+          this.removeEventListener('track', this._onaddstreampoly);
+        }
+
+        this.addEventListener('addstream', this._onaddstream = f);
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!_this3._remoteStreams) {
+              _this3._remoteStreams = [];
+            }
+
+            if (_this3._remoteStreams.includes(stream)) {
+              return;
+            }
+
+            _this3._remoteStreams.push(stream);
+
+            var event = new Event('addstream');
+            event.stream = stream;
+
+            _this3.dispatchEvent(event);
+          });
+        });
+      }
+    });
+    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
+
+    window.RTCPeerConnection.prototype.setRemoteDescription = function () {
+      var pc = this;
+
+      if (!this._onaddstreampoly) {
+        this.addEventListener('track', this._onaddstreampoly = function (e) {
+          e.streams.forEach(function (stream) {
+            if (!pc._remoteStreams) {
+              pc._remoteStreams = [];
+            }
+
+            if (pc._remoteStreams.indexOf(stream) >= 0) {
+              return;
+            }
+
+            pc._remoteStreams.push(stream);
+
+            var event = new Event('addstream');
+            event.stream = stream;
+            pc.dispatchEvent(event);
+          });
+        });
+      }
+
+      return origSetRemoteDescription.apply(pc, arguments);
+    };
+  }
+}
+
+function shimCallbacksAPI(window) {
+  if (_typeof(window) !== 'object' || !window.RTCPeerConnection) {
+    return;
+  }
+
+  var prototype = window.RTCPeerConnection.prototype;
+  var createOffer = prototype.createOffer;
+  var createAnswer = prototype.createAnswer;
+  var setLocalDescription = prototype.setLocalDescription;
+  var setRemoteDescription = prototype.setRemoteDescription;
+  var addIceCandidate = prototype.addIceCandidate;
+
+  prototype.createOffer = function (successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = createOffer.apply(this, [options]);
+
+    if (!failureCallback) {
+      return promise;
+    }
+
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.createAnswer = function (successCallback, failureCallback) {
+    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
+    var promise = createAnswer.apply(this, [options]);
+
+    if (!failureCallback) {
+      return promise;
+    }
+
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  var withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setLocalDescription.apply(this, [description]);
+
+    if (!failureCallback) {
+      return promise;
+    }
+
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.setLocalDescription = withCallback;
+
+  withCallback = function withCallback(description, successCallback, failureCallback) {
+    var promise = setRemoteDescription.apply(this, [description]);
+
+    if (!failureCallback) {
+      return promise;
+    }
+
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.setRemoteDescription = withCallback;
+
+  withCallback = function withCallback(candidate, successCallback, failureCallback) {
+    var promise = addIceCandidate.apply(this, [candidate]);
+
+    if (!failureCallback) {
+      return promise;
+    }
+
+    promise.then(successCallback, failureCallback);
+    return Promise.resolve();
+  };
+
+  prototype.addIceCandidate = withCallback;
+}
+
+function shimGetUserMedia(window) {
+  var navigator = window && window.navigator;
+
+  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    // shim not needed in Safari 12.1
+    var mediaDevices = navigator.mediaDevices;
+
+    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
+
+    navigator.mediaDevices.getUserMedia = function (constraints) {
+      return _getUserMedia(shimConstraints(constraints));
+    };
+  }
+
+  if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
+    navigator.getUserMedia = function (constraints, cb, errcb) {
+      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
+    }.bind(navigator);
+  }
+}
+
+function shimConstraints(constraints) {
+  if (constraints && constraints.video !== undefined) {
+    return Object.assign({}, constraints, {
+      video: utils.compactObject(constraints.video)
+    });
+  }
+
+  return constraints;
+}
+
+function shimRTCIceServerUrls(window) {
+  // migrate from non-spec RTCIceServer.url to RTCIceServer.urls
+  var OrigPeerConnection = window.RTCPeerConnection;
+
+  window.RTCPeerConnection = function (pcConfig, pcConstraints) {
+    if (pcConfig && pcConfig.iceServers) {
+      var newIceServers = [];
+
+      for (var i = 0; i < pcConfig.iceServers.length; i++) {
+        var server = pcConfig.iceServers[i];
+
+        if (!server.hasOwnProperty('urls') && server.hasOwnProperty('url')) {
+          utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
+          server = JSON.parse(JSON.stringify(server));
+          server.urls = server.url;
+          delete server.url;
+          newIceServers.push(server);
+        } else {
+          newIceServers.push(pcConfig.iceServers[i]);
+        }
+      }
+
+      pcConfig.iceServers = newIceServers;
+    }
+
+    return new OrigPeerConnection(pcConfig, pcConstraints);
+  };
+
+  window.RTCPeerConnection.prototype = OrigPeerConnection.prototype; // wrap static methods. Currently just generateCertificate.
+
+  if ('generateCertificate' in window.RTCPeerConnection) {
+    Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
+      get: function get() {
+        return OrigPeerConnection.generateCertificate;
+      }
+    });
+  }
+}
+
+function shimTrackEventTransceiver(window) {
+  // Add event.transceiver member over deprecated event.receiver
+  if (_typeof(window) === 'object' && window.RTCPeerConnection && 'receiver' in window.RTCTrackEvent.prototype && // can't check 'transceiver' in window.RTCTrackEvent.prototype, as it is
+  // defined for some reason even when window.RTCTransceiver is not.
+  !window.RTCTransceiver) {
+    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
+      get: function get() {
+        return {
+          receiver: this.receiver
+        };
+      }
+    });
+  }
+}
+
+function shimCreateOfferLegacy(window) {
+  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
+
+  window.RTCPeerConnection.prototype.createOffer = function (offerOptions) {
+    if (offerOptions) {
+      if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
+      }
+
+      var audioTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.sender.track && transceiver.sender.track.kind === 'audio';
+      });
+
+      if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
+        if (audioTransceiver.direction === 'sendrecv') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('sendonly');
+          } else {
+            audioTransceiver.direction = 'sendonly';
+          }
+        } else if (audioTransceiver.direction === 'recvonly') {
+          if (audioTransceiver.setDirection) {
+            audioTransceiver.setDirection('inactive');
+          } else {
+            audioTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {
+        this.addTransceiver('audio');
+      }
+
+      if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
+        // support bit values
+        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
+      }
+
+      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
+        return transceiver.sender.track && transceiver.sender.track.kind === 'video';
+      });
+
+      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
+        if (videoTransceiver.direction === 'sendrecv') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('sendonly');
+          } else {
+            videoTransceiver.direction = 'sendonly';
+          }
+        } else if (videoTransceiver.direction === 'recvonly') {
+          if (videoTransceiver.setDirection) {
+            videoTransceiver.setDirection('inactive');
+          } else {
+            videoTransceiver.direction = 'inactive';
+          }
+        }
+      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
+        this.addTransceiver('video');
+      }
+    }
+
+    return origCreateOffer.apply(this, arguments);
+  };
+}
+
+},{"../utils":29}],29:[function(require,module,exports){
+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree.
+ */
+
+/* eslint-env node */
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.extractVersion = extractVersion;
+exports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;
+exports.disableLog = disableLog;
+exports.disableWarnings = disableWarnings;
+exports.log = log;
+exports.deprecated = deprecated;
+exports.detectBrowser = detectBrowser;
+exports.compactObject = compactObject;
+
+function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+
+function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
+
+var logDisabled_ = true;
+var deprecationWarnings_ = true;
+/**
+ * Extract browser version out of the provided user agent string.
+ *
+ * @param {!string} uastring userAgent string.
+ * @param {!string} expr Regular expression used as match criteria.
+ * @param {!number} pos position in the version string to be returned.
+ * @return {!number} browser version.
+ */
+
+function extractVersion(uastring, expr, pos) {
+  var match = uastring.match(expr);
+  return match && match.length >= pos && parseInt(match[pos], 10);
+} // Wraps the peerconnection event eventNameToWrap in a function
+// which returns the modified event object (or false to prevent
+// the event).
+
+
+function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
+  if (!window.RTCPeerConnection) {
+    return;
+  }
+
+  var proto = window.RTCPeerConnection.prototype;
+  var nativeAddEventListener = proto.addEventListener;
+
+  proto.addEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap) {
+      return nativeAddEventListener.apply(this, arguments);
+    }
+
+    var wrappedCallback = function wrappedCallback(e) {
+      var modifiedEvent = wrapper(e);
+
+      if (modifiedEvent) {
+        cb(modifiedEvent);
+      }
+    };
+
+    this._eventMap = this._eventMap || {};
+    this._eventMap[cb] = wrappedCallback;
+    return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);
+  };
+
+  var nativeRemoveEventListener = proto.removeEventListener;
+
+  proto.removeEventListener = function (nativeEventName, cb) {
+    if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[cb]) {
+      return nativeRemoveEventListener.apply(this, arguments);
+    }
+
+    var unwrappedCb = this._eventMap[cb];
+    delete this._eventMap[cb];
+    return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);
+  };
+
+  Object.defineProperty(proto, 'on' + eventNameToWrap, {
+    get: function get() {
+      return this['_on' + eventNameToWrap];
+    },
+    set: function set(cb) {
+      if (this['_on' + eventNameToWrap]) {
+        this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);
+        delete this['_on' + eventNameToWrap];
+      }
+
+      if (cb) {
+        this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);
+      }
+    },
+    enumerable: true,
+    configurable: true
+  });
+}
+
+function disableLog(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + _typeof(bool) + '. Please use a boolean.');
+  }
+
+  logDisabled_ = bool;
+  return bool ? 'adapter.js logging disabled' : 'adapter.js logging enabled';
+}
+/**
+ * Disable or enable deprecation warnings
+ * @param {!boolean} bool set to true to disable warnings.
+ */
+
+
+function disableWarnings(bool) {
+  if (typeof bool !== 'boolean') {
+    return new Error('Argument type: ' + _typeof(bool) + '. Please use a boolean.');
+  }
+
+  deprecationWarnings_ = !bool;
+  return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
+}
+
+function log() {
+  if ((typeof window === "undefined" ? "undefined" : _typeof(window)) === 'object') {
+    if (logDisabled_) {
+      return;
+    }
+
+    if (typeof console !== 'undefined' && typeof console.log === 'function') {
+      console.log.apply(console, arguments);
+    }
+  }
+}
+/**
+ * Shows a deprecation warning suggesting the modern and spec-compatible API.
+ */
+
+
+function deprecated(oldMethod, newMethod) {
+  if (!deprecationWarnings_) {
+    return;
+  }
+
+  console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');
+}
+/**
+ * Browser detector.
+ *
+ * @return {object} result containing browser and version
+ *     properties.
+ */
+
+
+function detectBrowser(window) {
+  var navigator = window.navigator; // Returned result object.
+
+  var result = {
+    browser: null,
+    version: null
+  }; // Fail early if it's not a browser
+
+  if (typeof window === 'undefined' || !window.navigator) {
+    result.browser = 'Not a browser.';
+    return result;
+  }
+
+  if (navigator.mozGetUserMedia) {
+    // Firefox.
+    result.browser = 'firefox';
+    result.version = extractVersion(navigator.userAgent, /Firefox\/(\d+)\./, 1);
+  } else if (navigator.webkitGetUserMedia) {
+    // Chrome, Chromium, Webview, Opera.
+    // Version matches Chrome/WebRTC version.
+    result.browser = 'chrome';
+    result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\/(\d+)\./, 2);
+  } else if (navigator.mediaDevices && navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
+    // Edge.
+    result.browser = 'edge';
+    result.version = extractVersion(navigator.userAgent, /Edge\/(\d+).(\d+)$/, 2);
+  } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) {
+    // Safari.
+    result.browser = 'safari';
+    result.version = extractVersion(navigator.userAgent, /AppleWebKit\/(\d+)\./, 1);
+  } else {
+    // Default fallthrough: not supported.
+    result.browser = 'Not a supported browser.';
+    return result;
+  }
+
+  return result;
+}
+/**
+ * Remove all empty objects and undefined values
+ * from a nested object -- an enhanced and vanilla version
+ * of Lodash's `compact`.
+ */
+
+
+function compactObject(data) {
+  if (_typeof(data) !== 'object') {
+    return data;
+  }
+
+  return Object.keys(data).reduce(function (accumulator, key) {
+    var isObject = _typeof(data[key]) === 'object';
+    var value = isObject ? compactObject(data[key]) : data[key];
+    var isEmptyObject = isObject && !Object.keys(value).length;
+
+    if (value === undefined || isEmptyObject) {
+      return accumulator;
+    }
+
+    return Object.assign(accumulator, _defineProperty({}, key, value));
+  }, {});
+}
+
+},{}],30:[function(require,module,exports){
+"use strict";
+
+// created by @HenrikJoreteg
+var prefix;
+var version;
+
+if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
+  prefix = 'moz';
+  version = parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
+} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
+  prefix = 'webkit';
+  version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
+}
+
+var PC = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
+var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
+var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
+var MediaStream = window.webkitMediaStream || window.MediaStream;
+var screenSharing = window.location.protocol === 'https:' && (prefix === 'webkit' && version >= 26 || prefix === 'moz' && version >= 33);
+var AudioContext = window.AudioContext || window.webkitAudioContext;
+var videoEl = document.createElement('video');
+var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
+var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia; // export support flags and constructors.prototype && PC
+
+module.exports = {
+  prefix: prefix,
+  browserVersion: version,
+  support: !!PC && !!getUserMedia,
+  // new support style
+  supportRTCPeerConnection: !!PC,
+  supportVp8: supportVp8,
+  supportGetUserMedia: !!getUserMedia,
+  supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
+  supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
+  supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
+  supportScreenSharing: !!screenSharing,
+  // constructors
+  AudioContext: AudioContext,
+  PeerConnection: PC,
+  SessionDescription: SessionDescription,
+  IceCandidate: IceCandidate,
+  MediaStream: MediaStream,
+  getUserMedia: getUserMedia
+};
+
+},{}],31:[function(require,module,exports){
+"use strict";
+
+/*

+WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based

+on @visionmedia's Emitter from UI Kit.

+

+Why? I wanted it standalone.

+

+I also wanted support for wildcard emitters like this:

+

+emitter.on('*', function (eventName, other, event, payloads) {

+

+});

+

+emitter.on('somenamespace*', function (eventName, payloads) {

+

+});

+

+Please note that callbacks triggered by wildcard registered events also get

+the event name as the first argument.

+*/
+module.exports = WildEmitter;
+
+function WildEmitter() {}
+
+WildEmitter.mixin = function (constructor) {
+  var prototype = constructor.prototype || constructor;
+  prototype.isWildEmitter = true; // Listen on the given `event` with `fn`. Store a group name if present.
+
+  prototype.on = function (event, groupName, fn) {
+    this.callbacks = this.callbacks || {};
+    var hasGroup = arguments.length === 3,
+        group = hasGroup ? arguments[1] : undefined,
+        func = hasGroup ? arguments[2] : arguments[1];
+    func._groupName = group;
+    (this.callbacks[event] = this.callbacks[event] || []).push(func);
+    return this;
+  }; // Adds an `event` listener that will be invoked a single
+  // time then automatically removed.
+
+
+  prototype.once = function (event, groupName, fn) {
+    var self = this,
+        hasGroup = arguments.length === 3,
+        group = hasGroup ? arguments[1] : undefined,
+        func = hasGroup ? arguments[2] : arguments[1];
+
+    function on() {
+      self.off(event, on);
+      func.apply(this, arguments);
+    }
+
+    this.on(event, group, on);
+    return this;
+  }; // Unbinds an entire group
+
+
+  prototype.releaseGroup = function (groupName) {
+    this.callbacks = this.callbacks || {};
+    var item, i, len, handlers;
+
+    for (item in this.callbacks) {
+      handlers = this.callbacks[item];
+
+      for (i = 0, len = handlers.length; i < len; i++) {
+        if (handlers[i]._groupName === groupName) {
+          //console.log('removing');
+          // remove it and shorten the array we're looping through
+          handlers.splice(i, 1);
+          i--;
+          len--;
+        }
+      }
+    }
+
+    return this;
+  }; // Remove the given callback for `event` or all
+  // registered callbacks.
+
+
+  prototype.off = function (event, fn) {
+    this.callbacks = this.callbacks || {};
+    var callbacks = this.callbacks[event],
+        i;
+    if (!callbacks) return this; // remove all handlers
+
+    if (arguments.length === 1) {
+      delete this.callbacks[event];
+      return this;
+    } // remove specific handler
+
+
+    i = callbacks.indexOf(fn);
+    callbacks.splice(i, 1);
+
+    if (callbacks.length === 0) {
+      delete this.callbacks[event];
+    }
+
+    return this;
+  }; /// Emit `event` with the given args.
+  // also calls any `*` handlers
+
+
+  prototype.emit = function (event) {
+    this.callbacks = this.callbacks || {};
+    var args = [].slice.call(arguments, 1),
+        callbacks = this.callbacks[event],
+        specialCallbacks = this.getWildcardCallbacks(event),
+        i,
+        len,
+        item,
+        listeners;
+
+    if (callbacks) {
+      listeners = callbacks.slice();
+
+      for (i = 0, len = listeners.length; i < len; ++i) {
+        if (!listeners[i]) {
+          break;
+        }
+
+        listeners[i].apply(this, args);
+      }
+    }
+
+    if (specialCallbacks) {
+      len = specialCallbacks.length;
+      listeners = specialCallbacks.slice();
+
+      for (i = 0, len = listeners.length; i < len; ++i) {
+        if (!listeners[i]) {
+          break;
+        }
+
+        listeners[i].apply(this, [event].concat(args));
+      }
+    }
+
+    return this;
+  }; // Helper for for finding special wildcard event handlers that match the event
+
+
+  prototype.getWildcardCallbacks = function (eventName) {
+    this.callbacks = this.callbacks || {};
+    var item,
+        split,
+        result = [];
+
+    for (item in this.callbacks) {
+      split = item.split('*');
+
+      if (item === '*' || split.length === 2 && eventName.slice(0, split[0].length) === split[0]) {
+        result = result.concat(this.callbacks[item]);
+      }
+    }
+
+    return result;
+  };
+};
+
+WildEmitter.mixin(WildEmitter);
+
+},{}]},{},[4])(4)
+});
diff --git a/js/simplewebrtc/getscreenmedia.js b/js/simplewebrtc/getscreenmedia.js
new file mode 100644
index 000000000..bbd44b9b7
--- /dev/null
+++ b/js/simplewebrtc/getscreenmedia.js
@@ -0,0 +1,182 @@
+// getScreenMedia helper by @HenrikJoreteg
+var getUserMedia = function(constraints, callback) {
+	window.navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
+		callback(null, stream);
+	}).catch(function(error) {
+		callback(error, null);
+	});
+};
+
+// cache for constraints and callback
+var cache = {};
+
+module.exports = function (mode, constraints, cb) {
+	var hasConstraints = arguments.length === 3;
+	var callback = hasConstraints ? cb : constraints;
+	var error;
+
+	if (typeof window === 'undefined' || window.location.protocol === 'http:') {
+		error = new Error('NavigatorUserMediaError');
+		error.name = 'HTTPS_REQUIRED';
+		return callback(error);
+	}
+
+	if (navigator.webkitGetUserMedia) {
+		var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(\d+)\./)[1], 10);
+		var maxver = 33;
+		// Chrome 71 dropped support for "window.chrome.webstore;".
+		var isCef = (chromever < 71) && !window.chrome.webstore;
+		// "known" crash in chrome 34 and 35 on linux
+		if (window.navigator.userAgent.match('Linux')) maxver = 35;
+
+		// check that the extension is installed by looking for a
+		// sessionStorage variable that contains the extension id
+		// this has to be set after installation unless the contest
+		// script does that
+		if (sessionStorage.getScreenMediaJSExtensionId) {
+			chrome.runtime.sendMessage(sessionStorage.getScreenMediaJSExtensionId,
+				{type:'getScreen', id: 1}, null,
+				function (data) {
+					if (!data || data.sourceId === '') { // user canceled
+						var error = new Error('NavigatorUserMediaError');
+						error.name = 'PERMISSION_DENIED';
+						callback(error);
+					} else {
+						constraints = (hasConstraints && constraints) || {audio: false, video: {
+								mandatory: {
+									chromeMediaSource: 'desktop',
+									maxWidth: window.screen.width,
+									maxHeight: window.screen.height,
+									maxFrameRate: 3
+								}
+							}};
+						constraints.video.mandatory.chromeMediaSourceId = data.sourceId;
+						getUserMedia(constraints, callback);
+					}
+				}
+			);
+		} else if (window.cefGetScreenMedia) {
+			//window.cefGetScreenMedia is experimental - may be removed without notice
+			window.cefGetScreenMedia(function(sourceId) {
+				if (!sourceId) {
+					var error = new Error('cefGetScreenMediaError');
+					error.name = 'CEF_GETSCREENMEDIA_CANCELED';
+					callback(error);
+				} else {
+					constraints = (hasConstraints && constraints) || {audio: false, video: {
+							mandatory: {
+								chromeMediaSource: 'desktop',
+								maxWidth: window.screen.width,
+								maxHeight: window.screen.height,
+								maxFrameRate: 3
+							},
+							optional: [
+								{googLeakyBucket: true},
+								{googTemporalLayeredScreencast: true}
+							]
+						}};
+					constraints.video.mandatory.chromeMediaSourceId = sourceId;
+					getUserMedia(constraints, callback);
+				}
+			});
+		} else if (isCef || (chromever >= 26 && chromever <= maxver)) {
+			// chrome 26 - chrome 33 way to do it -- requires bad chrome://flags
+			// note: this is basically in maintenance mode and will go away soon
+			constraints = (hasConstraints && constraints) || {
+					video: {
+						mandatory: {
+							googLeakyBucket: true,
+							maxWidth: window.screen.width,
+							maxHeight: window.screen.height,
+							maxFrameRate: 3,
+							chromeMediaSource: 'screen'
+						}
+					}
+				};
+			getUserMedia(constraints, callback);
+		} else {
+			// chrome 34+ way requiring an extension
+			var pending = window.setTimeout(function () {
+				error = new Error('NavigatorUserMediaError');
+				error.name = 'EXTENSION_UNAVAILABLE';
+				return callback(error);
+			}, 1000);
+			cache[pending] = [callback, hasConstraints ? constraints : null];
+			window.postMessage({ type: 'getScreen', id: pending }, '*');
+		}
+	} else if (window.navigator.userAgent.match('Firefox')) {
+		var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
+		if (ffver >= 52) {
+			mode = mode || 'window';
+			constraints = (hasConstraints && constraints) || {
+				video: {
+					mozMediaSource: mode,
+					mediaSource: mode
+				}
+			};
+			getUserMedia(constraints, function (err, stream) {
+				callback(err, stream);
+				if (err) {
+					return;
+				}
+				// workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
+				var lastTime = stream.currentTime;
+				var polly = window.setInterval(function () {
+					if (!stream) window.clearInterval(polly);
+					if (stream.currentTime == lastTime) {
+						window.clearInterval(polly);
+						if (stream.onended) {
+							stream.onended();
+						}
+					}
+					lastTime = stream.currentTime;
+				}, 500);
+			});
+		} else {
+			error = new Error('NavigatorUserMediaError');
+			error.name = 'FF52_REQUIRED';
+			return callback(error);
+		}
+	} else if (navigator.mediaDevices && navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
+		navigator.mediaDevices.getDisplayMedia({video: true}).then(function(stream) {
+			callback(null, stream);
+		}).catch(function(error) {
+			callback(error, null);
+		});
+	}
+};
+
+typeof window !== 'undefined' && window.addEventListener('message', function (event) {
+	if (event.origin != window.location.origin && !event.isTrusted) {
+		return;
+	}
+	if (event.data.type == 'gotScreen' && cache[event.data.id]) {
+		var data = cache[event.data.id];
+		var constraints = data[1];
+		var callback = data[0];
+		delete cache[event.data.id];
+
+		if (event.data.sourceId === '') { // user canceled
+			var error = new Error('NavigatorUserMediaError');
+			error.name = 'PERMISSION_DENIED';
+			callback(error);
+		} else {
+			constraints = constraints || {audio: false, video: {
+					mandatory: {
+						chromeMediaSource: 'desktop',
+						maxWidth: window.screen.width,
+						maxHeight: window.screen.height,
+						maxFrameRate: 3
+					},
+					optional: [
+						{googLeakyBucket: true},
+						{googTemporalLayeredScreencast: true}
+					]
+				}};
+			constraints.video.mandatory.chromeMediaSourceId = event.data.sourceId;
+			getUserMedia(constraints, callback);
+		}
+	} else if (event.data.type == 'getScreenPending') {
+		window.clearTimeout(event.data.id);
+	}
+});
diff --git a/js/simplewebrtc/localmedia.js b/js/simplewebrtc/localmedia.js
new file mode 100644
index 000000000..0c749fd2f
--- /dev/null
+++ b/js/simplewebrtc/localmedia.js
@@ -0,0 +1,337 @@
+var util = require('util');
+var hark = require('hark');
+var getScreenMedia = require('./getscreenmedia');
+var WildEmitter = require('wildemitter');
+var mockconsole = require('mockconsole');
+
+function isAllTracksEnded(stream) {
+	var isAllTracksEnded = true;
+	stream.getTracks().forEach(function (t) {
+		isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+	});
+	return isAllTracksEnded;
+}
+
+function LocalMedia(opts) {
+	WildEmitter.call(this);
+
+	var config = this.config = {
+		detectSpeakingEvents: false,
+		audioFallback: false,
+		media: {
+			audio: true,
+			video: true
+		},
+		harkOptions: null,
+		logger: mockconsole
+	};
+
+	var item;
+	for (item in opts) {
+		if (opts.hasOwnProperty(item)) {
+			this.config[item] = opts[item];
+		}
+	}
+
+	this.logger = config.logger;
+	this._log = this.logger.log.bind(this.logger, 'LocalMedia:');
+	this._logerror = this.logger.error.bind(this.logger, 'LocalMedia:');
+
+	this.localStreams = [];
+	this.localScreens = [];
+
+	if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
+		this._logerror('Your browser does not support local media capture.');
+	}
+
+	this._audioMonitors = [];
+	this.on('localStreamStopped', this._stopAudioMonitor.bind(this));
+	this.on('localScreenStopped', this._stopAudioMonitor.bind(this));
+}
+
+util.inherits(LocalMedia, WildEmitter);
+
+
+LocalMedia.prototype.start = function (mediaConstraints, cb) {
+	var self = this;
+	var constraints = mediaConstraints || this.config.media;
+
+	this.emit('localStreamRequested', constraints);
+
+	navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
+		// Although the promise should be resolved only if all the constraints
+		// are met Edge resolves it if both audio and video are requested but
+		// only audio is available.
+		if (constraints.video && stream.getVideoTracks().length === 0) {
+			constraints.video = false;
+			self.start(constraints, cb);
+			return;
+		}
+
+		if (constraints.audio && self.config.detectSpeakingEvents) {
+			self._setupAudioMonitor(stream, self.config.harkOptions);
+		}
+		self.localStreams.push(stream);
+
+		stream.getTracks().forEach(function (track) {
+			track.addEventListener('ended', function () {
+				if (isAllTracksEnded(stream)) {
+					self._removeStream(stream);
+				}
+			});
+		});
+
+		self.emit('localStream', stream);
+
+		if (cb) {
+			return cb(null, stream);
+		}
+	}).catch(function (err) {
+			// Fallback for users without a camera
+			if (self.config.audioFallback && err.name === 'NotFoundError' && constraints.video !== false) {
+				constraints.video = false;
+				self.start(constraints, cb);
+				return;
+			}
+
+		self.emit('localStreamRequestFailed', constraints);
+
+		if (cb) {
+			return cb(err, null);
+		}
+	});
+};
+
+LocalMedia.prototype.stop = function (stream) {
+	this.stopStream(stream);
+	this.stopScreenShare(stream);
+};
+
+LocalMedia.prototype.stopStream = function (stream) {
+	var self = this;
+
+	if (stream) {
+		var idx = this.localStreams.indexOf(stream);
+		if (idx > -1) {
+			stream.getTracks().forEach(function (track) { track.stop(); });
+			this._removeStream(stream);
+		}
+	} else {
+		this.localStreams.forEach(function (stream) {
+			stream.getTracks().forEach(function (track) { track.stop(); });
+			self._removeStream(stream);
+		});
+	}
+};
+
+LocalMedia.prototype.startScreenShare = function (mode, constraints, cb) {
+	var self = this;
+
+	this.emit('localScreenRequested');
+
+	if (typeof constraints === 'function' && !cb) {
+		cb = constraints;
+		constraints = null;
+	}
+
+	getScreenMedia(mode, constraints, function (err, stream) {
+		if (!err) {
+			self.localScreens.push(stream);
+
+			stream.getTracks().forEach(function (track) {
+				track.addEventListener('ended', function () {
+					var isAllTracksEnded = true;
+					stream.getTracks().forEach(function (t) {
+						isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+					});
+
+					if (isAllTracksEnded) {
+						self._removeStream(stream);
+					}
+				});
+			});
+
+			self.emit('localScreen', stream);
+		} else {
+			self.emit('localScreenRequestFailed');
+		}
+
+		// enable the callback
+		if (cb) {
+			return cb(err, stream);
+		}
+	});
+};
+
+LocalMedia.prototype.stopScreenShare = function (stream) {
+	var self = this;
+
+	if (stream) {
+		var idx = this.localScreens.indexOf(stream);
+		if (idx > -1) {
+			stream.getTracks().forEach(function (track) { track.stop(); });
+			this._removeStream(stream);
+		}
+	} else {
+		this.localScreens.forEach(function (stream) {
+			stream.getTracks().forEach(function (track) { track.stop(); });
+			self._removeStream(stream);
+		});
+	}
+};
+
+// Audio controls
+LocalMedia.prototype.mute = function () {
+	this._audioEnabled(false);
+	this.emit('audioOff');
+};
+
+LocalMedia.prototype.unmute = function () {
+	this._audioEnabled(true);
+	this.emit('audioOn');
+};
+
+// Video controls
+LocalMedia.prototype.pauseVideo = function () {
+	this._videoEnabled(false);
+	this.emit('videoOff');
+};
+LocalMedia.prototype.resumeVideo = function () {
+	this._videoEnabled(true);
+	this.emit('videoOn');
+};
+
+// Combined controls
+LocalMedia.prototype.pause = function () {
+	this.mute();
+	this.pauseVideo();
+};
+LocalMedia.prototype.resume = function () {
+	this.unmute();
+	this.resumeVideo();
+};
+
+// Internal methods for enabling/disabling audio/video
+LocalMedia.prototype._audioEnabled = function (bool) {
+	this.localStreams.forEach(function (stream) {
+		stream.getAudioTracks().forEach(function (track) {
+			track.enabled = !!bool;
+		});
+	});
+};
+LocalMedia.prototype._videoEnabled = function (bool) {
+	this.localStreams.forEach(function (stream) {
+		stream.getVideoTracks().forEach(function (track) {
+			track.enabled = !!bool;
+		});
+	});
+};
+
+// check if all audio streams are enabled
+LocalMedia.prototype.isAudioEnabled = function () {
+	var enabled = true;
+	var hasAudioTracks = false;
+	this.localStreams.forEach(function (stream) {
+		var audioTracks = stream.getAudioTracks();
+		if (audioTracks.length > 0) {
+			hasAudioTracks = true;
+			audioTracks.forEach(function (track) {
+				enabled = enabled && track.enabled;
+			});
+		}
+	});
+
+	// If no audioTracks were found, that means there is no microphone device.
+	// In that case, isAudioEnabled should return false.
+	if (!hasAudioTracks) {
+		return false;
+	}
+
+	return enabled;
+};
+
+// check if all video streams are enabled
+LocalMedia.prototype.isVideoEnabled = function () {
+	var enabled = true;
+	var hasVideoTracks = false;
+	this.localStreams.forEach(function (stream) {
+		var videoTracks = stream.getVideoTracks();
+		if (videoTracks.length > 0) {
+			hasVideoTracks = true;
+			videoTracks.forEach(function (track) {
+				enabled = enabled && track.enabled;
+			});
+		}
+	});
+
+	// If no videoTracks were found, that means there is no camera device.
+	// In that case, isVideoEnabled should return false.
+	if (!hasVideoTracks) {
+		return false;
+	}
+
+	return enabled;
+};
+
+LocalMedia.prototype._removeStream = function (stream) {
+	var idx = this.localStreams.indexOf(stream);
+	if (idx > -1) {
+		this.localStreams.splice(idx, 1);
+		this.emit('localStreamStopped', stream);
+	} else {
+		idx = this.localScreens.indexOf(stream);
+		if (idx > -1) {
+			this.localScreens.splice(idx, 1);
+			this.emit('localScreenStopped', stream);
+		}
+	}
+};
+
+LocalMedia.prototype._setupAudioMonitor = function (stream, harkOptions) {
+	this._log('Setup audio');
+	var audio = hark(stream, harkOptions);
+	var self = this;
+	var timeout;
+
+	audio.on('speaking', function () {
+		self.emit('speaking');
+	});
+
+	audio.on('stopped_speaking', function () {
+		if (timeout) {
+			clearTimeout(timeout);
+		}
+
+		timeout = setTimeout(function () {
+			self.emit('stoppedSpeaking');
+		}, 1000);
+	});
+	audio.on('volume_change', function (volume, threshold) {
+		self.emit('volumeChange', volume, threshold);
+	});
+
+	this._audioMonitors.push({audio: audio, stream: stream});
+};
+
+LocalMedia.prototype._stopAudioMonitor = function (stream) {
+	var idx = -1;
+	this._audioMonitors.forEach(function (monitors, i) {
+		if (monitors.stream === stream) {
+			idx = i;
+		}
+	});
+
+	if (idx > -1) {
+		this._audioMonitors[idx].audio.stop();
+		this._audioMonitors.splice(idx, 1);
+	}
+};
+
+// fallback for old .localScreen behaviour
+Object.defineProperty(LocalMedia.prototype, 'localScreen', {
+	get: function () {
+		return this.localScreens.length > 0 ? this.localScreens[0] : null;
+	}
+});
+
+module.exports = LocalMedia;
diff --git a/js/simplewebrtc/peer.js b/js/simplewebrtc/peer.js
new file mode 100644
index 000000000..3ddad179f
--- /dev/null
+++ b/js/simplewebrtc/peer.js
@@ -0,0 +1,306 @@
+var util = require('util');
+var webrtcSupport = require('webrtcsupport');
+var WildEmitter = require('wildemitter');
+
+function isAllTracksEnded(stream) {
+	var isAllTracksEnded = true;
+	stream.getTracks().forEach(function (t) {
+		isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
+	});
+	return isAllTracksEnded;
+}
+
+function Peer(options) {
+	var self = this;
+
+	// call emitter constructor
+	WildEmitter.call(this);
+
+	this.id = options.id;
+	this.parent = options.parent;
+	this.type = options.type || 'video';
+	this.oneway = options.oneway || false;
+	this.sharemyscreen = options.sharemyscreen || false;
+	this.browserPrefix = options.prefix;
+	this.stream = options.stream;
+	this.enableDataChannels = options.enableDataChannels === undefined ? this.parent.config.enableDataChannels : options.enableDataChannels;
+	this.receiveMedia = options.receiveMedia || this.parent.config.receiveMedia;
+	this.channels = {};
+	this.pendingDCMessages = []; // key (datachannel label) -> value (array[pending messages])
+	this.sid = options.sid || Date.now().toString();
+	this.pc = new RTCPeerConnection(this.parent.config.peerConnectionConfig);
+	this.pc.addEventListener('icecandidate', this.onIceCandidate.bind(this));
+	this.pc.addEventListener('endofcandidates', function (event) {
+		self.send('endOfCandidates', event);
+	});
+	this.pc.addEventListener('addstream', this.handleRemoteStreamAdded.bind(this));
+	this.pc.addEventListener('datachannel', this.handleDataChannelAdded.bind(this));
+	this.pc.addEventListener('removestream', this.handleStreamRemoved.bind(this));
+	// Just fire negotiation needed events for now
+	// When browser re-negotiation handling seems to work
+	// we can use this as the trigger for starting the offer/answer process
+	// automatically. We'll just leave it be for now while this stabalizes.
+	this.pc.addEventListener('negotiationneeded', this.emit.bind(this, 'negotiationNeeded'));
+	this.pc.addEventListener('iceconnectionstatechange', this.emit.bind(this, 'iceConnectionStateChange'));
+	this.pc.addEventListener('iceconnectionstatechange', function () {
+		switch (self.pc.iceConnectionState) {
+		case 'failed':
+			// currently, in chrome only the initiator goes to failed
+			// so we need to signal this to the peer
+			if (self.pc.localDescription.type === 'offer') {
+				self.parent.emit('iceFailed', self);
+				self.send('connectivityError');
+			}
+			break;
+		}
+	});
+	this.pc.addEventListener('signalingstatechange', this.emit.bind(this, 'signalingStateChange'));
+	this.logger = this.parent.logger;
+
+	// handle screensharing/broadcast mode
+	if (options.type === 'screen') {
+		if (this.parent.localScreen && this.sharemyscreen) {
+			this.logger.log('adding local screen stream to peer connection');
+			this.pc.addStream(this.parent.localScreen);
+			this.broadcaster = options.broadcaster;
+		}
+	} else {
+		this.parent.localStreams.forEach(function (stream) {
+			self.pc.addStream(stream);
+		});
+	}
+
+	// proxy events to parent
+	this.on('*', function () {
+		self.parent.emit.apply(self.parent, arguments);
+	});
+}
+
+util.inherits(Peer, WildEmitter);
+
+Peer.prototype.offer = function(options) {
+	this.pc.createOffer(options).then(function(offer) {
+		this.pc.setLocalDescription(offer).then(function() {
+			if (this.parent.config.nick) offer.nick = this.parent.config.nick;
+			this.send('offer', offer);
+		}.bind(this)).catch(function(error) {
+			console.warn("setLocalDescription for offer failed: ", error);
+		}.bind(this));
+	}.bind(this)).catch(function(error) {
+		console.warn("createOffer failed: ", error);
+	}.bind(this));
+};
+
+Peer.prototype.handleOffer = function (offer) {
+	this.pc.setRemoteDescription(offer).then(function() {
+		this.answer();
+	}.bind(this)).catch(function(error) {
+		console.warn("setRemoteDescription for offer failed: ", error);
+	}.bind(this));
+};
+
+Peer.prototype.answer = function() {
+	this.pc.createAnswer().then(function(answer) {
+		this.pc.setLocalDescription(answer).then(function() {
+			if (this.parent.config.nick) answer.nick = this.parent.config.nick;
+			this.send('answer', answer);
+		}.bind(this)).catch(function(error) {
+			console.warn("setLocalDescription for answer failed: ", error);
+		}.bind(this));
+	}.bind(this)).catch(function(error) {
+		console.warn("createAnswer failed: ", error);
+	}.bind(this));
+};
+
+Peer.prototype.handleAnswer = function (answer) {
+	this.pc.setRemoteDescription(answer).catch(function(error) {
+		console.warn("setRemoteDescription for answer failed: ", error);
+	}.bind(this));
+};
+
+Peer.prototype.handleMessage = function (message) {
+	var self = this;
+
+	this.logger.log('getting', message.type, message);
+
+	if (message.prefix) this.browserPrefix = message.prefix;
+
+	if (message.type === 'offer') {
+		if (!this.nick) this.nick = message.payload.nick;
+		delete message.payload.nick;
+		this.handleOffer(message.payload);
+	} else if (message.type === 'answer') {
+		if (!this.nick) this.nick = message.payload.nick;
+		delete message.payload.nick;
+		this.handleAnswer(message.payload);
+	} else if (message.type === 'candidate') {
+		this.pc.addIceCandidate(message.payload.candidate);
+	} else if (message.type === 'connectivityError') {
+		this.parent.emit('connectivityError', self);
+	} else if (message.type === 'mute') {
+		this.parent.emit('mute', {id: message.from, name: message.payload.name});
+	} else if (message.type === 'unmute') {
+		this.parent.emit('unmute', {id: message.from, name: message.payload.name});
+	} else if (message.type === 'endOfCandidates') {
+		this.pc.addIceCandidate('');
+	} else if (message.type === 'unshareScreen') {
+		this.parent.emit('unshareScreen', {id: message.from});
+		this.end();
+	}
+};
+
+// send via signalling channel
+Peer.prototype.send = function (messageType, payload) {
+	var message = {
+		to: this.id,
+		sid: this.sid,
+		broadcaster: this.broadcaster,
+		roomType: this.type,
+		type: messageType,
+		payload: payload,
+		prefix: webrtcSupport.prefix
+	};
+	this.logger.log('sending', messageType, message);
+	this.parent.emit('message', message);
+};
+
+// send via data channel
+// returns true when message was sent and false if channel is not open
+Peer.prototype.sendDirectly = function (channel, messageType, payload) {
+	var message = {
+		type: messageType,
+		payload: payload
+	};
+	this.logger.log('sending via datachannel', channel, messageType, message);
+	var dc = this.getDataChannel(channel);
+	if (dc.readyState != 'open') {
+		if (!this.pendingDCMessages.hasOwnProperty(channel)) {
+			this.pendingDCMessages[channel] = [];
+		}
+		this.pendingDCMessages[channel].push(message);
+		return false;
+	}
+	dc.send(JSON.stringify(message));
+	return true;
+};
+
+// Internal method registering handlers for a data channel and emitting events on the peer
+Peer.prototype._observeDataChannel = function (channel) {
+	var self = this;
+	channel.onclose = this.emit.bind(this, 'channelClose', channel);
+	channel.onerror = this.emit.bind(this, 'channelError', channel);
+	channel.onmessage = function (event) {
+		self.emit('channelMessage', self, channel.label, JSON.parse(event.data), channel, event);
+	};
+	channel.onopen = function () {
+		self.emit('channelOpen', channel);
+		// Check if there are messages that could not be send
+		if (self.pendingDCMessages.hasOwnProperty(channel.label)) {
+			var pendingMessages = self.pendingDCMessages[channel.label];
+			for (var i = 0; i < pendingMessages.length; i++) {
+				self.sendDirectly(channel.label, pendingMessages[i].type, pendingMessages[i].payload);
+			}
+			self.pendingDCMessages[channel.label] = [];
+		}
+	};
+};
+
+// Fetch or create a data channel by the given name
+Peer.prototype.getDataChannel = function (name, opts) {
+	if (!webrtcSupport.supportDataChannel) return this.emit('error', new Error('createDataChannel not supported'));
+	var channel = this.channels[name];
+	opts || (opts = {});
+	if (channel) return channel;
+	// if we don't have one by this label, create it
+	channel = this.channels[name] = this.pc.createDataChannel(name, opts);
+	this._observeDataChannel(channel);
+	return channel;
+};
+
+Peer.prototype.onIceCandidate = function (event) {
+	var candidate = event.candidate;
+	if (this.closed) return;
+	if (candidate) {
+		var pcConfig = this.parent.config.peerConnectionConfig;
+		if (webrtcSupport.prefix === 'moz' && pcConfig && pcConfig.iceTransports &&
+				candidate.candidate && candidate.candidate.candidate &&
+				candidate.candidate.candidate.indexOf(pcConfig.iceTransports) < 0) {
+			this.logger.log('Ignoring ice candidate not matching pcConfig iceTransports type: ', pcConfig.iceTransports);
+		} else {
+			// Retain legacy data structure for compatibility with
+			// mobile clients.
+			var expandedCandidate = {
+				candidate: {
+					candidate: candidate.candidate,
+					sdpMid: candidate.sdpMid,
+					sdpMLineIndex: candidate.sdpMLineIndex
+				}
+			};
+			this.send('candidate', expandedCandidate);
+		}
+	} else {
+		this.logger.log("End of candidates.");
+	}
+};
+
+Peer.prototype.start = function () {
+	var self = this;
+
+	// well, the webrtc api requires that we either
+	// a) create a datachannel a priori
+	// b) do a renegotiation later to add the SCTP m-line
+	// Let's do (a) first...
+	if (this.enableDataChannels) {
+		this.getDataChannel('simplewebrtc');
+	}
+
+	this.offer(this.receiveMedia);
+};
+
+Peer.prototype.icerestart = function () {
+	var constraints = this.receiveMedia;
+	constraints.iceRestart = true;
+	this.offer(constraints);
+};
+
+Peer.prototype.end = function () {
+	if (this.closed) return;
+	this.pc.close();
+	this.handleStreamRemoved();
+};
+
+Peer.prototype.handleRemoteStreamAdded = function (event) {
+	var self = this;
+	if (this.stream) {
+		this.logger.warn('Already have a remote stream');
+	} else {
+		this.stream = event.stream;
+
+		this.stream.getTracks().forEach(function (track) {
+			track.addEventListener('ended', function () {
+				if (isAllTracksEnded(self.stream)) {
+					self.end();
+				}
+			});
+		});
+
+		this.parent.emit('peerStreamAdded', this);
+	}
+};
+
+Peer.prototype.handleStreamRemoved = function () {
+	var peerIndex = this.parent.peers.indexOf(this);
+	if (peerIndex > -1) {
+		this.parent.peers.splice(peerIndex, 1);
+		this.closed = true;
+		this.parent.emit('peerStreamRemoved', this);
+	}
+};
+
+Peer.prototype.handleDataChannelAdded = function (event) {
+	var channel = event.channel;
+	this.channels[channel.label] = channel;
+	this._observeDataChannel(channel);
+};
+
+module.exports = Peer;
diff --git a/js/simplewebrtc/simplewebrtc.js b/js/simplewebrtc/simplewebrtc.js
new file mode 100644
index 000000000..191fe4ea9
--- /dev/null
+++ b/js/simplewebrtc/simplewebrtc.js
@@ -0,0 +1,422 @@
+var WebRTC = require('./webrtc');
+var WildEmitter = require('wildemitter');
+var webrtcSupport = require('webrtcsupport');
+var attachMediaStream = require('attachmediastream');
+var mockconsole = require('mockconsole');
+
+function SimpleWebRTC(opts) {
+	var self = this;
+	var options = opts || {};
+	var config = this.config = {
+			socketio: {/* 'force new connection':true*/},
+			connection: null,
+			debug: false,
+			localVideoEl: '',
+			remoteVideosEl: '',
+			enableDataChannels: true,
+			autoRequestMedia: false,
+			autoRemoveVideos: true,
+			adjustPeerVolume: false,
+			peerVolumeWhenSpeaking: 0.25,
+			media: {
+				video: true,
+				audio: true
+			},
+			receiveMedia: {
+				offerToReceiveAudio: 1,
+				offerToReceiveVideo: 1
+			},
+			localVideo: {
+				autoplay: true,
+				mirror: true,
+				muted: true
+			}
+		};
+	var item, connection;
+
+	// We also allow a 'logger' option. It can be any object that implements
+	// log, warn, and error methods.
+	// We log nothing by default, following "the rule of silence":
+	// http://www.linfo.org/rule_of_silence.html
+	this.logger = function () {
+		// we assume that if you're in debug mode and you didn't
+		// pass in a logger, you actually want to log as much as
+		// possible.
+		if (opts.debug) {
+			return opts.logger || console;
+		} else {
+		// or we'll use your logger which should have its own logic
+		// for output. Or we'll return the no-op.
+			return opts.logger || mockconsole;
+		}
+	}();
+
+	// set our config from options
+	for (item in options) {
+		if (options.hasOwnProperty(item)) {
+			this.config[item] = options[item];
+		}
+	}
+
+	// attach detected support for convenience
+	this.capabilities = webrtcSupport;
+
+	// call WildEmitter constructor
+	WildEmitter.call(this);
+
+	if (this.config.connection === null) {
+		throw 'no connection object given in the configuration';
+	} else {
+		connection = this.connection = this.config.connection;
+	}
+
+	connection.on('connect', function () {
+		self.emit('connectionReady', connection.getSessionid());
+		self.sessionReady = true;
+		self.testReadiness();
+	});
+
+	connection.on('message', function (message) {
+		var peers = self.webrtc.getPeers(message.from, message.roomType);
+		var peer;
+
+		if (message.type === 'offer') {
+			if (peers.length) {
+				peers.forEach(function (p) {
+					if (p.sid == message.sid) peer = p;
+				});
+				//if (!peer) peer = peers[0]; // fallback for old protocol versions
+			}
+			if (!peer) {
+				peer = self.webrtc.createPeer({
+					id: message.from,
+					sid: message.sid,
+					type: message.roomType,
+					enableDataChannels: self.config.enableDataChannels && message.roomType !== 'screen',
+					sharemyscreen: message.roomType === 'screen' && !message.broadcaster,
+					broadcaster: message.roomType === 'screen' && !message.broadcaster ? self.connection.getSessionid() : null
+				});
+				self.emit('createdPeer', peer);
+			}
+			peer.handleMessage(message);
+		} else if (peers.length) {
+			peers.forEach(function (peer) {
+				if (message.sid) {
+					if (peer.sid === message.sid) {
+						peer.handleMessage(message);
+					}
+				} else {
+					peer.handleMessage(message);
+				}
+			});
+		}
+	});
+
+	connection.on('remove', function (room) {
+		if (room.id !== self.connection.getSessionid()) {
+			self.webrtc.removePeers(room.id, room.type);
+		}
+	});
+
+	// instantiate our main WebRTC helper
+	// using same logger from logic here
+	opts.logger = this.logger;
+	opts.debug = false;
+	this.webrtc = new WebRTC(opts);
+
+	// attach a few methods from underlying lib to simple.
+	['mute', 'unmute', 'pauseVideo', 'resumeVideo', 'pause', 'resume', 'sendToAll', 'sendDirectlyToAll', 'getPeers', 'createPeer', 'removePeers'].forEach(function (method) {
+		self[method] = self.webrtc[method].bind(self.webrtc);
+	});
+
+	// proxy events from WebRTC
+	this.webrtc.on('*', function () {
+		self.emit.apply(self, arguments);
+	});
+
+	// log all events in debug mode
+	if (config.debug) {
+		this.on('*', this.logger.log.bind(this.logger, 'SimpleWebRTC event:'));
+	}
+
+	// check for readiness
+	this.webrtc.on('localStream', function () {
+		self.testReadiness();
+	});
+
+	this.webrtc.on('message', function (payload) {
+		self.connection.emit('message', payload);
+	});
+
+	this.webrtc.on('peerStreamAdded', this.handlePeerStreamAdded.bind(this));
+	this.webrtc.on('peerStreamRemoved', this.handlePeerStreamRemoved.bind(this));
+
+	// echo cancellation attempts
+	if (this.config.adjustPeerVolume) {
+		this.webrtc.on('speaking', this.setVolumeForAll.bind(this, this.config.peerVolumeWhenSpeaking));
+		this.webrtc.on('stoppedSpeaking', this.setVolumeForAll.bind(this, 1));
+	}
+
+	connection.on('stunservers', function (args) {
+		// resets/overrides the config
+		self.webrtc.config.peerConnectionConfig.iceServers = args;
+		self.emit('stunservers', args);
+	});
+	connection.on('turnservers', function (args) {
+		// appends to the config
+		self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
+		self.emit('turnservers', args);
+	});
+
+	this.webrtc.on('iceFailed', function (peer) {
+		// local ice failure
+	});
+	this.webrtc.on('connectivityError', function (peer) {
+		// remote ice failure
+	});
+
+
+	// sending mute/unmute to all peers
+	this.webrtc.on('audioOn', function () {
+		self.webrtc.sendToAll('unmute', {name: 'audio'});
+	});
+	this.webrtc.on('audioOff', function () {
+		self.webrtc.sendToAll('mute', {name: 'audio'});
+	});
+	this.webrtc.on('videoOn', function () {
+		self.webrtc.sendToAll('unmute', {name: 'video'});
+	});
+	this.webrtc.on('videoOff', function () {
+		self.webrtc.sendToAll('mute', {name: 'video'});
+	});
+
+	// screensharing events
+	this.webrtc.on('localScreen', function (stream) {
+		var item,
+			el = document.createElement('video'),
+			container = self.getRemoteVideoContainer();
+
+		el.oncontextmenu = function () { return false; };
+		el.id = 'localScreen';
+		attachMediaStream(stream, el);
+		if (container) {
+			container.appendChild(el);
+		}
+
+		self.emit('localScreenAdded', el);
+		self.connection.emit('shareScreen');
+
+		// NOTE: we don't create screen peers for existing video peers here,
+		// this is done by the application code in "webrtc.js".
+	});
+	this.webrtc.on('localScreenStopped', function (stream) {
+		if (self.getLocalScreen()) {
+			self.stopScreenShare();
+		}
+		/*
+		self.connection.emit('unshareScreen');
+		self.webrtc.peers.forEach(function (peer) {
+			if (peer.sharemyscreen) {
+				peer.end();
+			}
+		});
+		*/
+	});
+
+	this.webrtc.on('channelMessage', function (peer, label, data) {
+		if (data.type == 'volume') {
+			self.emit('remoteVolumeChange', peer, data.volume);
+		}
+	});
+}
+
+
+SimpleWebRTC.prototype = Object.create(WildEmitter.prototype, {
+	constructor: {
+		value: SimpleWebRTC
+	}
+});
+
+SimpleWebRTC.prototype.leaveCall = function () {
+	if (this.roomName) {
+		while (this.webrtc.peers.length) {
+			this.webrtc.peers[0].end();
+		}
+		if (this.getLocalScreen()) {
+			this.stopScreenShare();
+		}
+		this.emit('leftRoom', this.roomName);
+		this.stopLocalVideo();
+		this.roomName = undefined;
+	}
+};
+
+SimpleWebRTC.prototype.disconnect = function () {
+	this.connection.disconnect();
+	delete this.connection;
+};
+
+SimpleWebRTC.prototype.handlePeerStreamAdded = function (peer) {
+	var self = this;
+	var container = this.getRemoteVideoContainer();
+	var video = attachMediaStream(peer.stream);
+
+	// At least Firefox, Opera and Edge move the video to a wrong position
+	// instead of keeping it unchanged	when "transform: scaleX(1)" is used
+	// ("transform: scaleX(-1)" is fine); as it should have no effect the
+	// transform is removed.
+	if (video.style.transform === 'scaleX(1)') {
+		video.style.transform = '';
+	}
+
+	// store video element as part of peer for easy removal
+	peer.videoEl = video;
+	video.id = this.getDomId(peer);
+
+	if (container) container.appendChild(video);
+
+	this.emit('videoAdded', video, peer);
+
+	// send our mute status to new peer if we're muted
+	// currently called with a small delay because it arrives before
+	// the video element is created otherwise (which happens after
+	// the async setRemoteDescription-createAnswer)
+	window.setTimeout(function () {
+		if (!self.webrtc.isAudioEnabled()) {
+			peer.send('mute', {name: 'audio'});
+		}
+		if (!self.webrtc.isVideoEnabled()) {
+			peer.send('mute', {name: 'video'});
+		}
+	}, 250);
+};
+
+SimpleWebRTC.prototype.handlePeerStreamRemoved = function (peer) {
+	var container = this.getRemoteVideoContainer();
+	var videoEl = peer.videoEl;
+	if (this.config.autoRemoveVideos && container && videoEl) {
+		container.removeChild(videoEl);
+	}
+	if (videoEl) this.emit('videoRemoved', videoEl, peer);
+};
+
+SimpleWebRTC.prototype.getDomId = function (peer) {
+	return [peer.id, peer.type, peer.broadcaster ? 'broadcasting' : 'incoming'].join('_');
+};
+
+// set volume on video tag for all peers takse a value between 0 and 1
+SimpleWebRTC.prototype.setVolumeForAll = function (volume) {
+	this.webrtc.peers.forEach(function (peer) {
+		if (peer.videoEl) peer.videoEl.volume = volume;
+	});
+};
+
+SimpleWebRTC.prototype.joinCall = function (name) {
+	if (this.config.autoRequestMedia) this.startLocalVideo();
+	this.roomName = name;
+	this.emit('joinedRoom', name);
+};
+
+SimpleWebRTC.prototype.getEl = function (idOrEl) {
+	if (typeof idOrEl === 'string') {
+		return document.getElementById(idOrEl);
+	} else {
+		return idOrEl;
+	}
+};
+
+SimpleWebRTC.prototype.startLocalVideo = function () {
+	var self = this;
+	this.webrtc.start(this.config.media, function (err, stream) {
+		if (err) {
+			self.emit('localMediaError', err);
+		} else {
+			self.emit('localMediaStarted', self.config.media);
+			attachMediaStream(stream, self.getLocalVideoContainer(), self.config.localVideo);
+		}
+	});
+};
+
+SimpleWebRTC.prototype.stopLocalVideo = function () {
+	this.webrtc.stop();
+};
+
+// this accepts either element ID or element
+// and either the video tag itself or a container
+// that will be used to put the video tag into.
+SimpleWebRTC.prototype.getLocalVideoContainer = function () {
+	var el = this.getEl(this.config.localVideoEl);
+	if (el && el.tagName === 'VIDEO') {
+		el.oncontextmenu = function () { return false; };
+		return el;
+	} else if (el) {
+		var video = document.createElement('video');
+		video.oncontextmenu = function () { return false; };
+		el.appendChild(video);
+		return video;
+	} else {
+		return;
+	}
+};
+
+SimpleWebRTC.prototype.getRemoteVideoContainer = function () {
+	return this.getEl(this.config.remoteVideosEl);
+};
+
+SimpleWebRTC.prototype.shareScreen = function (mode, cb) {
+	this.webrtc.startScreenShare(mode, cb);
+};
+
+SimpleWebRTC.prototype.getLocalScreen = function () {
+	return this.webrtc.localScreen;
+};
+
+SimpleWebRTC.prototype.stopScreenShare = function () {
+	this.connection.emit('unshareScreen');
+	var videoEl = document.getElementById('localScreen');
+	var container = this.getRemoteVideoContainer();
+
+	if (this.config.autoRemoveVideos && container && videoEl) {
+		container.removeChild(videoEl);
+	}
+
+	// a hack to emit the event the removes the video
+	// element that we want
+	if (videoEl) {
+		this.emit('videoRemoved', videoEl);
+	}
+	if (this.getLocalScreen()) {
+		this.webrtc.stopScreenShare();
+	}
+	// Notify peers were sending to.
+	this.webrtc.peers.forEach(function (peer) {
+		if (peer.type === 'screen' && peer.sharemyscreen) {
+			peer.send('unshareScreen');
+		}
+		if (peer.broadcaster) {
+			peer.end();
+		}
+	});
+};
+
+SimpleWebRTC.prototype.testReadiness = function () {
+	var self = this;
+	if (this.sessionReady) {
+		if (!this.config.media.video && !this.config.media.audio) {
+			self.emit('readyToCall', self.connection.getSessionid());
+		} else if (this.webrtc.localStreams.length > 0) {
+			self.emit('readyToCall', self.connection.getSessionid());
+		}
+	}
+};
+
+SimpleWebRTC.prototype.createRoom = function (name, cb) {
+	this.roomName = name;
+	if (arguments.length === 2) {
+		this.connection.emit('create', name, cb);
+	} else {
+		this.connection.emit('create', name);
+	}
+};
+
+module.exports = SimpleWebRTC;
diff --git a/js/simplewebrtc/webrtc.js b/js/simplewebrtc/webrtc.js
new file mode 100644
index 000000000..f3be2e552
--- /dev/null
+++ b/js/simplewebrtc/webrtc.js
@@ -0,0 +1,164 @@
+var util = require('util');
+var webrtcSupport = require('webrtcsupport');
+var mockconsole = require('mockconsole');
+var localMedia = require('./localmedia');
+var Peer = require('./peer');
+
+
+function WebRTC(opts) {
+	var self = this;
+	var options = opts || {};
+	var config = this.config = {
+			debug: false,
+			// makes the entire PC config overridable
+			peerConnectionConfig: {
+				iceServers: []
+			},
+			receiveMedia: {
+				offerToReceiveAudio: 1,
+				offerToReceiveVideo: 1
+			},
+			enableDataChannels: true
+		};
+	var item;
+
+	// We also allow a 'logger' option. It can be any object that implements
+	// log, warn, and error methods.
+	// We log nothing by default, following "the rule of silence":
+	// http://www.linfo.org/rule_of_silence.html
+	this.logger = function () {
+		// we assume that if you're in debug mode and you didn't
+		// pass in a logger, you actually want to log as much as
+		// possible.
+		if (opts.debug) {
+			return opts.logger || console;
+		} else {
+		// or we'll use your logger which should have its own logic
+		// for output. Or we'll return the no-op.
+			return opts.logger || mockconsole;
+		}
+	}();
+
+	// set options
+	for (item in options) {
+		if (options.hasOwnProperty(item)) {
+			this.config[item] = options[item];
+		}
+	}
+
+	// check for support
+	if (!webrtcSupport.support) {
+		this.logger.error('Your browser doesn\'t seem to support WebRTC');
+	}
+
+	// where we'll store our peer connections
+	this.peers = [];
+
+	// call localMedia constructor
+	localMedia.call(this, this.config);
+
+	this.on('speaking', function () {
+		if (!self.hardMuted) {
+			// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+			self.peers.forEach(function (peer) {
+				if (peer.enableDataChannels) {
+					var dc = peer.getDataChannel('hark');
+					if (dc.readyState != 'open') return;
+					dc.send(JSON.stringify({type: 'speaking'}));
+				}
+			});
+		}
+	});
+	this.on('stoppedSpeaking', function () {
+		if (!self.hardMuted) {
+			// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+			self.peers.forEach(function (peer) {
+				if (peer.enableDataChannels) {
+					var dc = peer.getDataChannel('hark');
+					if (dc.readyState != 'open') return;
+					dc.send(JSON.stringify({type: 'stoppedSpeaking'}));
+				}
+			});
+		}
+	});
+	this.on('volumeChange', function (volume, treshold) {
+		if (!self.hardMuted) {
+			// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
+			self.peers.forEach(function (peer) {
+				if (peer.enableDataChannels) {
+					var dc = peer.getDataChannel('hark');
+					if (dc.readyState != 'open') return;
+					dc.send(JSON.stringify({type: 'volume', volume: volume }));
+				}
+			});
+		}
+	});
+
+	this.on('unshareScreen', function(message) {
+		// End peers we were receiving the screensharing stream from.
+		var peers = self.getPeers(message.from, 'screen');
+		peers.forEach(function(peer) {
+			if (!peer.sharemyscreen) {
+				peer.end();
+			}
+		});
+	});
+
+	// log events in debug mode
+	if (this.config.debug) {
+		this.on('*', function (event, val1, val2) {
+			var logger;
+			// if you didn't pass in a logger and you explicitly turning on debug
+			// we're just going to assume you're wanting log output with console
+			if (self.config.logger === mockconsole) {
+				logger = console;
+			} else {
+				logger = self.logger;
+			}
+			logger.log('event:', event, val1, val2);
+		});
+	}
+}
+
+util.inherits(WebRTC, localMedia);
+
+WebRTC.prototype.createPeer = function (opts) {
+	var peer;
+	opts.parent = this;
+	peer = new Peer(opts);
+	this.peers.push(peer);
+	return peer;
+};
+
+// removes peers
+WebRTC.prototype.removePeers = function (id, type) {
+	this.getPeers(id, type).forEach(function (peer) {
+		peer.end();
+	});
+};
+
+// fetches all Peer objects by session id and/or type
+WebRTC.prototype.getPeers = function (sessionId, type) {
+	return this.peers.filter(function (peer) {
+		return (!sessionId || peer.id === sessionId) && (!type || peer.type === type);
+	});
+};
+
+// sends message to all
+WebRTC.prototype.sendToAll = function (message, payload) {
+	this.peers.forEach(function (peer) {
+		peer.send(message, payload);
+	});
+};
+
+// sends message to all using a datachannel
+// only sends to anyone who has an open datachannel
+WebRTC.prototype.sendDirectlyToAll = function (channel, message, payload) {
+	this.peers.forEach(function (peer) {
+		if (peer.enableDataChannels) {
+			peer.sendDirectly(channel, message, payload);
+		}
+	});
+};
+
+module.exports = WebRTC;
diff --git a/js/webrtc.js b/js/webrtc.js
index aa5b75e74..c8e25aaed 100644
--- a/js/webrtc.js
+++ b/js/webrtc.js
@@ -467,7 +467,7 @@ var spreedPeerConnectionTable = [];
 				// Initialize ice restart counter for peer
 				spreedPeerConnectionTable[peer.id] = 0;
 
-				peer.pc.on('iceConnectionStateChange', function () {
+				peer.pc.addEventListener('iceconnectionstatechange', function () {
 					var userId = spreedMappingTable[peer.id];
 
 					switch (peer.pc.iceConnectionState) {
@@ -528,8 +528,8 @@ var spreedPeerConnectionTable = [];
 										videoView.setConnectionStatus(OCA.Talk.Views.VideoView.ConnectionStatus.DISCONNECTED_LONG);
 
 										if (spreedPeerConnectionTable[peer.id] < 5) {
-											if (peer.pc.pc.peerconnection.localDescription.type === 'offer' &&
-												peer.pc.pc.peerconnection.signalingState === 'stable') {
+											if (peer.pc.localDescription.type === 'offer' &&
+												peer.pc.signalingState === 'stable') {
 												spreedPeerConnectionTable[peer.id] ++;
 												console.log('ICE restart.');
 												peer.icerestart();
@@ -548,8 +548,8 @@ var spreedPeerConnectionTable = [];
 								if (spreedPeerConnectionTable[peer.id] < 5) {
 									videoView.setConnectionStatus(OCA.Talk.Views.VideoView.ConnectionStatus.FAILED);
 
-									if (peer.pc.pc.peerconnection.localDescription.type === 'offer' &&
-										peer.pc.pc.peerconnection.signalingState === 'stable') {
+									if (peer.pc.localDescription.type === 'offer' &&
+										peer.pc.signalingState === 'stable') {
 										spreedPeerConnectionTable[peer.id] ++;
 										console.log('ICE restart.');
 										peer.icerestart();
@@ -570,10 +570,6 @@ var spreedPeerConnectionTable = [];
 
 					OCA.SpreedMe.speakers.updateVideoContainerDummyIfLatestSpeaker(peer.id);
 				});
-
-				peer.pc.on('PeerConnectionTrace', function (event) {
-					console.log('trace', event);
-				});
 			},
 			// The nick name below the avatar is distributed through the
 			// DataChannel of the PeerConnection and only sent once during
@@ -855,15 +851,14 @@ var spreedPeerConnectionTable = [];
 
 		function checkPeerMedia(peer, track, mediaType) {
 			var defer = $.Deferred();
-			peer.pc.pc.getStats(track, function(stats) {
+			peer.pc.getStats(track).then(function(stats) {
 				var result = false;
-				Object.keys(stats).forEach(function(key) {
-					var value = stats[key];
-					if (!result && !value || value.mediaType !== mediaType || !value.hasOwnProperty('bytesReceived')) {
+				stats.forEach(function(statsReport) {
+					if (!result && statsReport.mediaType !== mediaType || !statsReport.hasOwnProperty('bytesReceived')) {
 						return;
 					}
 
-					if (value.bytesReceived > 0) {
+					if (statsReport.bytesReceived > 0) {
 						OCA.SpreedMe.webrtc.emit('unmute', {
 							id: peer.id,
 							name: mediaType
diff --git a/package.json b/package.json
index 35e629af0..77059e708 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,13 @@
   "author": "",
   "license": "AGPL-3.0",
   "devDependencies": {
+    "@babel/core": "^7.3.4",
+    "@babel/preset-env": "^7.3.4",
+    "attachmediastream": "^2.1.0",
+    "babelify": "^10.0.0",
+    "browserify": "^16.2.3",
     "handlebars": "^4.0.12",
+    "hark": "^1.2.3",
     "jasmine": "^2.5.2",
     "jasmine-ajax": "^3.2.0",
     "jasmine-core": "^2.5.2",
@@ -22,6 +28,11 @@
     "karma-jasmine": "^1.0.2",
     "karma-jasmine-ajax": "^0.1.13",
     "karma-phantomjs-launcher": "^1.0.2",
-    "phantomjs-prebuilt": "^2.1.13"
+    "mockconsole": "0.0.1",
+    "phantomjs-prebuilt": "^2.1.13",
+    "util": "^0.11.1",
+    "webrtc-adapter": "^7.2.1",
+    "webrtcsupport": "^2.2.0",
+    "wildemitter": "^1.2.0"
   }
 }