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|
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the
// Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
// Boston, MA 02110-1335, USA.
//
// SPDX-License-Identifier: LGPL-2.1-or-later
use futures::future::BoxFuture;
use futures::prelude::*;
use gst::glib;
use gst::prelude::*;
use gst::subclass::prelude::*;
use gst_net::*;
use once_cell::sync::Lazy;
use std::i32;
use std::io;
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, UdpSocket};
use std::sync::Mutex;
use std::time::Duration;
use std::u16;
use crate::runtime::prelude::*;
use crate::runtime::{Async, Context, PadSrc, PadSrcRef, Task};
use crate::socket::{wrap_socket, GioSocketWrapper, Socket, SocketError, SocketRead};
const DEFAULT_ADDRESS: Option<&str> = Some("0.0.0.0");
const DEFAULT_PORT: i32 = 5004;
const DEFAULT_REUSE: bool = true;
const DEFAULT_CAPS: Option<gst::Caps> = None;
const DEFAULT_MTU: u32 = 1492;
const DEFAULT_SOCKET: Option<GioSocketWrapper> = None;
const DEFAULT_USED_SOCKET: Option<GioSocketWrapper> = None;
const DEFAULT_CONTEXT: &str = "";
const DEFAULT_CONTEXT_WAIT: Duration = Duration::ZERO;
const DEFAULT_RETRIEVE_SENDER_ADDRESS: bool = true;
#[derive(Debug, Clone)]
struct Settings {
address: Option<String>,
port: i32, // for conformity with C based udpsrc
reuse: bool,
caps: Option<gst::Caps>,
mtu: u32,
socket: Option<GioSocketWrapper>,
used_socket: Option<GioSocketWrapper>,
context: String,
context_wait: Duration,
retrieve_sender_address: bool,
}
impl Default for Settings {
fn default() -> Self {
Settings {
address: DEFAULT_ADDRESS.map(Into::into),
port: DEFAULT_PORT,
reuse: DEFAULT_REUSE,
caps: DEFAULT_CAPS,
mtu: DEFAULT_MTU,
socket: DEFAULT_SOCKET,
used_socket: DEFAULT_USED_SOCKET,
context: DEFAULT_CONTEXT.into(),
context_wait: DEFAULT_CONTEXT_WAIT,
retrieve_sender_address: DEFAULT_RETRIEVE_SENDER_ADDRESS,
}
}
}
#[derive(Debug)]
struct UdpReader(Async<UdpSocket>);
impl UdpReader {
fn new(socket: Async<UdpSocket>) -> Self {
UdpReader(socket)
}
}
impl SocketRead for UdpReader {
const DO_TIMESTAMP: bool = true;
fn read<'buf>(
&'buf mut self,
buffer: &'buf mut [u8],
) -> BoxFuture<'buf, io::Result<(usize, Option<std::net::SocketAddr>)>> {
async move {
self.0
.recv_from(buffer)
.await
.map(|(read_size, saddr)| (read_size, Some(saddr)))
}
.boxed()
}
}
#[derive(Clone, Debug)]
struct UdpSrcPadHandler;
impl PadSrcHandler for UdpSrcPadHandler {
type ElementImpl = UdpSrc;
fn src_event(&self, pad: &PadSrcRef, imp: &UdpSrc, event: gst::Event) -> bool {
gst::log!(CAT, obj: pad.gst_pad(), "Handling {:?}", event);
use gst::EventView;
let ret = match event.view() {
EventView::FlushStart(..) => imp.task.flush_start().await_maybe_on_context().is_ok(),
EventView::FlushStop(..) => imp.task.flush_stop().await_maybe_on_context().is_ok(),
EventView::Reconfigure(..) => true,
EventView::Latency(..) => true,
_ => false,
};
if ret {
gst::log!(CAT, obj: pad.gst_pad(), "Handled {:?}", event);
} else {
gst::log!(CAT, obj: pad.gst_pad(), "Didn't handle {:?}", event);
}
ret
}
fn src_query(&self, pad: &PadSrcRef, imp: &UdpSrc, query: &mut gst::QueryRef) -> bool {
gst::log!(CAT, obj: pad.gst_pad(), "Handling {:?}", query);
use gst::QueryViewMut;
let ret = match query.view_mut() {
QueryViewMut::Latency(q) => {
q.set(true, gst::ClockTime::ZERO, gst::ClockTime::NONE);
true
}
QueryViewMut::Scheduling(q) => {
q.set(gst::SchedulingFlags::SEQUENTIAL, 1, -1, 0);
q.add_scheduling_modes(&[gst::PadMode::Push]);
true
}
QueryViewMut::Caps(q) => {
let caps = if let Some(caps) = imp.configured_caps.lock().unwrap().as_ref() {
q.filter()
.map(|f| f.intersect_with_mode(caps, gst::CapsIntersectMode::First))
.unwrap_or_else(|| caps.clone())
} else {
q.filter()
.map(|f| f.to_owned())
.unwrap_or_else(gst::Caps::new_any)
};
q.set_result(&caps);
true
}
_ => false,
};
if ret {
gst::log!(CAT, obj: pad.gst_pad(), "Handled {:?}", query);
} else {
gst::log!(CAT, obj: pad.gst_pad(), "Didn't handle {:?}", query);
}
ret
}
}
struct UdpSrcTask {
element: super::UdpSrc,
socket: Option<Socket<UdpReader>>,
retrieve_sender_address: bool,
need_initial_events: bool,
need_segment: bool,
}
impl UdpSrcTask {
fn new(element: super::UdpSrc) -> Self {
UdpSrcTask {
element,
socket: None,
retrieve_sender_address: DEFAULT_RETRIEVE_SENDER_ADDRESS,
need_initial_events: true,
need_segment: true,
}
}
}
impl TaskImpl for UdpSrcTask {
type Item = gst::Buffer;
fn prepare(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
async move {
let udpsrc = self.element.imp();
let mut settings = udpsrc.settings.lock().unwrap();
gst::debug!(CAT, obj: &self.element, "Preparing Task");
self.retrieve_sender_address = settings.retrieve_sender_address;
let socket = if let Some(ref wrapped_socket) = settings.socket {
let socket: UdpSocket;
#[cfg(unix)]
{
socket = wrapped_socket.get()
}
#[cfg(windows)]
{
socket = wrapped_socket.get()
}
let socket = Async::<UdpSocket>::try_from(socket).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to setup Async socket: {}", err]
)
})?;
settings.used_socket = Some(wrapped_socket.clone());
socket
} else {
let addr: IpAddr = match settings.address {
None => {
return Err(gst::error_msg!(
gst::ResourceError::Settings,
["No address set"]
));
}
Some(ref addr) => match addr.parse() {
Err(err) => {
return Err(gst::error_msg!(
gst::ResourceError::Settings,
["Invalid address '{}' set: {}", addr, err]
));
}
Ok(addr) => addr,
},
};
let port = settings.port;
// TODO: TTL, multicast loopback, etc
let saddr = if addr.is_multicast() {
let bind_addr = if addr.is_ipv4() {
IpAddr::V4(Ipv4Addr::UNSPECIFIED)
} else {
IpAddr::V6(Ipv6Addr::UNSPECIFIED)
};
let saddr = SocketAddr::new(bind_addr, port as u16);
gst::debug!(
CAT,
obj: &self.element,
"Binding to {:?} for multicast group {:?}",
saddr,
addr
);
saddr
} else {
let saddr = SocketAddr::new(addr, port as u16);
gst::debug!(CAT, obj: &self.element, "Binding to {:?}", saddr);
saddr
};
let socket = if addr.is_ipv4() {
socket2::Socket::new(
socket2::Domain::IPV4,
socket2::Type::DGRAM,
Some(socket2::Protocol::UDP),
)
} else {
socket2::Socket::new(
socket2::Domain::IPV6,
socket2::Type::DGRAM,
Some(socket2::Protocol::UDP),
)
}
.map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to create socket: {}", err]
)
})?;
socket.set_reuse_address(settings.reuse).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to set reuse_address: {}", err]
)
})?;
#[cfg(unix)]
{
socket.set_reuse_port(settings.reuse).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to set reuse_port: {}", err]
)
})?;
}
socket.bind(&saddr.into()).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to bind socket: {}", err]
)
})?;
let socket = Async::<UdpSocket>::try_from(socket).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to setup Async socket: {}", err]
)
})?;
if addr.is_multicast() {
// TODO: Multicast interface configuration, going to be tricky
match addr {
IpAddr::V4(addr) => {
socket
.as_ref()
.join_multicast_v4(&addr, &Ipv4Addr::new(0, 0, 0, 0))
.map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to join multicast group: {}", err]
)
})?;
}
IpAddr::V6(addr) => {
socket.as_ref().join_multicast_v6(&addr, 0).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to join multicast group: {}", err]
)
})?;
}
}
}
settings.used_socket = Some(wrap_socket(&socket)?);
socket
};
let port: i32 = socket.as_ref().local_addr().unwrap().port().into();
if settings.port != port {
settings.port = port;
drop(settings);
self.element.notify("port");
settings = udpsrc.settings.lock().unwrap();
};
let buffer_pool = gst::BufferPool::new();
let mut config = buffer_pool.config();
config.set_params(None, settings.mtu, 0, 0);
buffer_pool.set_config(config).map_err(|err| {
gst::error_msg!(
gst::ResourceError::Settings,
["Failed to configure buffer pool {:?}", err]
)
})?;
self.socket = Some(
Socket::try_new(
self.element.clone().upcast(),
buffer_pool,
UdpReader::new(socket),
)
.map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to prepare socket {:?}", err]
)
})?,
);
self.element.notify("used-socket");
Ok(())
}
.boxed()
}
fn unprepare(&mut self) -> BoxFuture<'_, ()> {
async move {
gst::debug!(CAT, obj: &self.element, "Unpreparing Task");
let udpsrc = self.element.imp();
udpsrc.settings.lock().unwrap().used_socket = None;
self.element.notify("used-socket");
}
.boxed()
}
fn start(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
async move {
gst::log!(CAT, obj: &self.element, "Starting task");
self.socket
.as_mut()
.unwrap()
.set_clock(self.element.clock(), self.element.base_time());
gst::log!(CAT, obj: &self.element, "Task started");
Ok(())
}
.boxed()
}
fn try_next(&mut self) -> BoxFuture<'_, Result<gst::Buffer, gst::FlowError>> {
async move {
self.socket
.as_mut()
.unwrap()
.try_next()
.await
.map(|(mut buffer, saddr)| {
if let Some(saddr) = saddr {
if self.retrieve_sender_address {
NetAddressMeta::add(
buffer.get_mut().unwrap(),
&gio::InetSocketAddress::from(saddr),
);
}
}
buffer
})
.map_err(|err| {
gst::error!(CAT, obj: &self.element, "Got error {:?}", err);
match err {
SocketError::Gst(err) => {
gst::element_error!(
self.element,
gst::StreamError::Failed,
("Internal data stream error"),
["streaming stopped, reason {}", err]
);
}
SocketError::Io(err) => {
gst::element_error!(
self.element,
gst::StreamError::Failed,
("I/O error"),
["streaming stopped, I/O error {}", err]
);
}
}
gst::FlowError::Error
})
}
.boxed()
}
fn handle_item(&mut self, buffer: gst::Buffer) -> BoxFuture<'_, Result<(), gst::FlowError>> {
async {
gst::log!(CAT, obj: &self.element, "Handling {:?}", buffer);
let udpsrc = self.element.imp();
if self.need_initial_events {
gst::debug!(CAT, obj: &self.element, "Pushing initial events");
let stream_id =
format!("{:08x}{:08x}", rand::random::<u32>(), rand::random::<u32>());
let stream_start_evt = gst::event::StreamStart::builder(&stream_id)
.group_id(gst::GroupId::next())
.build();
udpsrc.src_pad.push_event(stream_start_evt).await;
let caps = udpsrc.settings.lock().unwrap().caps.clone();
if let Some(caps) = caps {
udpsrc
.src_pad
.push_event(gst::event::Caps::new(&caps))
.await;
*udpsrc.configured_caps.lock().unwrap() = Some(caps);
}
self.need_initial_events = false;
}
if self.need_segment {
let segment_evt =
gst::event::Segment::new(&gst::FormattedSegment::<gst::format::Time>::new());
udpsrc.src_pad.push_event(segment_evt).await;
self.need_segment = false;
}
let res = udpsrc.src_pad.push(buffer).await.map(drop);
match res {
Ok(_) => gst::log!(CAT, obj: &self.element, "Successfully pushed buffer"),
Err(gst::FlowError::Flushing) => gst::debug!(CAT, obj: &self.element, "Flushing"),
Err(gst::FlowError::Eos) => {
gst::debug!(CAT, obj: &self.element, "EOS");
udpsrc.src_pad.push_event(gst::event::Eos::new()).await;
}
Err(err) => {
gst::error!(CAT, obj: &self.element, "Got error {}", err);
gst::element_error!(
self.element,
gst::StreamError::Failed,
("Internal data stream error"),
["streaming stopped, reason {}", err]
);
}
}
res
}
.boxed()
}
fn stop(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
async move {
gst::log!(CAT, obj: &self.element, "Stopping task");
self.need_initial_events = true;
self.need_segment = true;
gst::log!(CAT, obj: &self.element, "Task stopped");
Ok(())
}
.boxed()
}
fn flush_stop(&mut self) -> BoxFuture<'_, Result<(), gst::ErrorMessage>> {
async move {
gst::log!(CAT, obj: &self.element, "Stopping task flush");
self.need_segment = true;
gst::log!(CAT, obj: &self.element, "Stopped task flush");
Ok(())
}
.boxed()
}
}
pub struct UdpSrc {
src_pad: PadSrc,
task: Task,
configured_caps: Mutex<Option<gst::Caps>>,
settings: Mutex<Settings>,
}
static CAT: Lazy<gst::DebugCategory> = Lazy::new(|| {
gst::DebugCategory::new(
"ts-udpsrc",
gst::DebugColorFlags::empty(),
Some("Thread-sharing UDP source"),
)
});
impl UdpSrc {
fn prepare(&self) -> Result<(), gst::ErrorMessage> {
gst::debug!(CAT, imp: self, "Preparing");
let settings = self.settings.lock().unwrap();
let context =
Context::acquire(&settings.context, settings.context_wait).map_err(|err| {
gst::error_msg!(
gst::ResourceError::OpenRead,
["Failed to acquire Context: {}", err]
)
})?;
drop(settings);
*self.configured_caps.lock().unwrap() = None;
self.task
.prepare(UdpSrcTask::new(self.instance().clone()), context)
.block_on()?;
gst::debug!(CAT, imp: self, "Prepared");
Ok(())
}
fn unprepare(&self) {
gst::debug!(CAT, imp: self, "Unpreparing");
self.task.unprepare().block_on().unwrap();
gst::debug!(CAT, imp: self, "Unprepared");
}
fn stop(&self) -> Result<(), gst::ErrorMessage> {
gst::debug!(CAT, imp: self, "Stopping");
self.task.stop().block_on()?;
gst::debug!(CAT, imp: self, "Stopped");
Ok(())
}
fn start(&self) -> Result<(), gst::ErrorMessage> {
gst::debug!(CAT, imp: self, "Starting");
self.task.start().block_on()?;
gst::debug!(CAT, imp: self, "Started");
Ok(())
}
fn pause(&self) -> Result<(), gst::ErrorMessage> {
gst::debug!(CAT, imp: self, "Pausing");
self.task.pause().block_on()?;
gst::debug!(CAT, imp: self, "Paused");
Ok(())
}
}
#[glib::object_subclass]
impl ObjectSubclass for UdpSrc {
const NAME: &'static str = "RsTsUdpSrc";
type Type = super::UdpSrc;
type ParentType = gst::Element;
fn with_class(klass: &Self::Class) -> Self {
Self {
src_pad: PadSrc::new(
gst::Pad::from_template(&klass.pad_template("src").unwrap(), Some("src")),
UdpSrcPadHandler,
),
task: Task::default(),
configured_caps: Default::default(),
settings: Default::default(),
}
}
}
impl ObjectImpl for UdpSrc {
fn properties() -> &'static [glib::ParamSpec] {
static PROPERTIES: Lazy<Vec<glib::ParamSpec>> = Lazy::new(|| {
let mut properties = vec![
glib::ParamSpecString::builder("context")
.nick("Context")
.blurb("Context name to share threads with")
.default_value(Some(DEFAULT_CONTEXT))
.build(),
glib::ParamSpecUInt::builder("context-wait")
.nick("Context Wait")
.blurb("Throttle poll loop to run at most once every this many ms")
.maximum(1000)
.default_value(DEFAULT_CONTEXT_WAIT.as_millis() as u32)
.build(),
glib::ParamSpecString::builder("address")
.nick("Address")
.blurb("Address/multicast group to listen on")
.default_value(DEFAULT_ADDRESS)
.build(),
glib::ParamSpecInt::builder("port")
.nick("Port")
.blurb("Port to listen on")
.minimum(0)
.maximum(u16::MAX as i32)
.default_value(DEFAULT_PORT)
.build(),
glib::ParamSpecBoolean::builder("reuse")
.nick("Reuse")
.blurb("Allow reuse of the port")
.default_value(DEFAULT_REUSE)
.build(),
glib::ParamSpecBoxed::builder::<gst::Caps>("caps")
.nick("Caps")
.blurb("Caps to use")
.build(),
glib::ParamSpecUInt::builder("mtu")
.nick("MTU")
.blurb("Maximum expected packet size. This directly defines the allocation size of the receive buffer pool")
.maximum(i32::MAX as u32)
.default_value(DEFAULT_MTU)
.build(),
glib::ParamSpecBoolean::builder("retrieve-sender-address")
.nick("Retrieve sender address")
.blurb("Whether to retrieve the sender address and add it to buffers as meta. Disabling this might result in minor performance improvements in certain scenarios")
.default_value(DEFAULT_RETRIEVE_SENDER_ADDRESS)
.build(),
];
#[cfg(not(windows))]
{
properties.push(
glib::ParamSpecObject::builder::<gio::Socket>("socket")
.nick("Socket")
.blurb("Socket to use for UDP reception. (None == allocate)")
.build(),
);
properties.push(
glib::ParamSpecObject::builder::<gio::Socket>("used-socket")
.nick("Used Socket")
.blurb("Socket currently in use for UDP reception. (None = no socket)")
.read_only()
.build(),
);
}
properties
});
PROPERTIES.as_ref()
}
fn set_property(&self, _id: usize, value: &glib::Value, pspec: &glib::ParamSpec) {
let mut settings = self.settings.lock().unwrap();
match pspec.name() {
"address" => {
settings.address = value.get().expect("type checked upstream");
}
"port" => {
settings.port = value.get().expect("type checked upstream");
}
"reuse" => {
settings.reuse = value.get().expect("type checked upstream");
}
"caps" => {
settings.caps = value.get().expect("type checked upstream");
}
"mtu" => {
settings.mtu = value.get().expect("type checked upstream");
}
"socket" => {
settings.socket = value
.get::<Option<gio::Socket>>()
.expect("type checked upstream")
.map(|socket| GioSocketWrapper::new(&socket));
}
"used-socket" => {
unreachable!();
}
"context" => {
settings.context = value
.get::<Option<String>>()
.expect("type checked upstream")
.unwrap_or_else(|| DEFAULT_CONTEXT.into());
}
"context-wait" => {
settings.context_wait = Duration::from_millis(
value.get::<u32>().expect("type checked upstream").into(),
);
}
"retrieve-sender-address" => {
settings.retrieve_sender_address = value.get().expect("type checked upstream");
}
_ => unimplemented!(),
}
}
fn property(&self, _id: usize, pspec: &glib::ParamSpec) -> glib::Value {
let settings = self.settings.lock().unwrap();
match pspec.name() {
"address" => settings.address.to_value(),
"port" => settings.port.to_value(),
"reuse" => settings.reuse.to_value(),
"caps" => settings.caps.to_value(),
"mtu" => settings.mtu.to_value(),
"socket" => settings
.socket
.as_ref()
.map(GioSocketWrapper::as_socket)
.to_value(),
"used-socket" => settings
.used_socket
.as_ref()
.map(GioSocketWrapper::as_socket)
.to_value(),
"context" => settings.context.to_value(),
"context-wait" => (settings.context_wait.as_millis() as u32).to_value(),
"retrieve-sender-address" => settings.retrieve_sender_address.to_value(),
_ => unimplemented!(),
}
}
fn constructed(&self) {
self.parent_constructed();
let obj = self.instance();
obj.add_pad(self.src_pad.gst_pad()).unwrap();
obj.set_element_flags(gst::ElementFlags::SOURCE);
}
}
impl GstObjectImpl for UdpSrc {}
impl ElementImpl for UdpSrc {
fn metadata() -> Option<&'static gst::subclass::ElementMetadata> {
static ELEMENT_METADATA: Lazy<gst::subclass::ElementMetadata> = Lazy::new(|| {
gst::subclass::ElementMetadata::new(
"Thread-sharing UDP source",
"Source/Network",
"Receives data over the network via UDP",
"Sebastian Dröge <sebastian@centricular.com>",
)
});
Some(&*ELEMENT_METADATA)
}
fn pad_templates() -> &'static [gst::PadTemplate] {
static PAD_TEMPLATES: Lazy<Vec<gst::PadTemplate>> = Lazy::new(|| {
let caps = gst::Caps::new_any();
let src_pad_template = gst::PadTemplate::new(
"src",
gst::PadDirection::Src,
gst::PadPresence::Always,
&caps,
)
.unwrap();
vec![src_pad_template]
});
PAD_TEMPLATES.as_ref()
}
fn change_state(
&self,
transition: gst::StateChange,
) -> Result<gst::StateChangeSuccess, gst::StateChangeError> {
gst::trace!(CAT, imp: self, "Changing state {:?}", transition);
match transition {
gst::StateChange::NullToReady => {
self.prepare().map_err(|err| {
self.post_error_message(err);
gst::StateChangeError
})?;
}
gst::StateChange::PlayingToPaused => {
self.pause().map_err(|_| gst::StateChangeError)?;
}
gst::StateChange::ReadyToNull => {
self.unprepare();
}
_ => (),
}
let mut success = self.parent_change_state(transition)?;
match transition {
gst::StateChange::ReadyToPaused => {
success = gst::StateChangeSuccess::NoPreroll;
}
gst::StateChange::PausedToPlaying => {
self.start().map_err(|_| gst::StateChangeError)?;
}
gst::StateChange::PlayingToPaused => {
success = gst::StateChangeSuccess::NoPreroll;
}
gst::StateChange::PausedToReady => {
self.stop().map_err(|_| gst::StateChangeError)?;
}
_ => (),
}
Ok(success)
}
}
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