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/*******************************************************************************
* Copyright 2009-2016 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#pragma once
/**
* @file ThreadedDevice.h
* @ingroup plugin
* The ThreadedDevice class.
*/
#include "devices/SoftwareDevice.h"
#include <thread>
AUD_NAMESPACE_BEGIN
/**
* This device extends the SoftwareDevice with code for running mixing in a separate thread.
*/
class AUD_PLUGIN_API ThreadedDevice : public SoftwareDevice
{
private:
/**
* Whether there is currently playback.
*/
bool m_playing;
/**
* Whether the current playback should stop.
*/
bool m_stop;
/**
* The streaming thread.
*/
std::thread m_thread;
/**
* Starts the streaming thread.
*/
AUD_LOCAL void start();
/**
* Streaming thread main function.
*/
AUD_LOCAL virtual void runMixingThread()=0;
// delete copy constructor and operator=
ThreadedDevice(const ThreadedDevice&) = delete;
ThreadedDevice& operator=(const ThreadedDevice&) = delete;
protected:
virtual void playing(bool playing);
/**
* Empty default constructor. To setup the device call the function create()
* and to uninitialize call destroy().
*/
ThreadedDevice();
/**
* Indicates that the mixing thread should be stopped.
* \return Whether the mixing thread should be stopping.
* \warning For thread safety, the device needs to be locked, when this method is called.
*/
inline bool shouldStop() { return m_stop; }
/**
* This method needs to be called when the mixing thread is stopping.
* \warning For thread safety, the device needs to be locked, when this method is called.
*/
inline void doStop() { m_stop = m_playing = false; }
/**
* Stops all playback and notifies the mixing thread to stop.
* \warning The device has to be unlocked to not run into a deadlock.
*/
void stopMixingThread();
};
AUD_NAMESPACE_END
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