blob: 0023a2f6e4213cc354569d87acd9df4c097278e5 [file] [log] [blame]
/*
* Copyright 2004 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. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "pc/channel_manager.h"
#include <utility>
#include "absl/algorithm/container.h"
#include "absl/memory/memory.h"
#include "absl/strings/match.h"
#include "media/base/media_constants.h"
#include "rtc_base/checks.h"
#include "rtc_base/location.h"
#include "rtc_base/logging.h"
#include "rtc_base/thread_checker.h"
#include "rtc_base/trace_event.h"
namespace cricket {
ChannelManager::ChannelManager(
std::unique_ptr<MediaEngineInterface> media_engine,
std::unique_ptr<DataEngineInterface> data_engine,
rtc::Thread* worker_thread,
rtc::Thread* network_thread)
: media_engine_(std::move(media_engine)),
data_engine_(std::move(data_engine)),
main_thread_(rtc::Thread::Current()),
worker_thread_(worker_thread),
network_thread_(network_thread) {
RTC_DCHECK(data_engine_);
RTC_DCHECK(worker_thread_);
RTC_DCHECK(network_thread_);
}
ChannelManager::~ChannelManager() {
if (initialized_) {
Terminate();
}
// The media engine needs to be deleted on the worker thread for thread safe
// destruction,
worker_thread_->Invoke<void>(RTC_FROM_HERE, [&] { media_engine_.reset(); });
}
bool ChannelManager::SetVideoRtxEnabled(bool enable) {
// To be safe, this call is only allowed before initialization. Apps like
// Flute only have a singleton ChannelManager and we don't want this flag to
// be toggled between calls or when there's concurrent calls. We expect apps
// to enable this at startup and retain that setting for the lifetime of the
// app.
if (!initialized_) {
enable_rtx_ = enable;
return true;
} else {
RTC_LOG(LS_WARNING) << "Cannot toggle rtx after initialization!";
return false;
}
}
void ChannelManager::GetSupportedAudioSendCodecs(
std::vector<AudioCodec>* codecs) const {
if (!media_engine_) {
return;
}
*codecs = media_engine_->voice().send_codecs();
}
void ChannelManager::GetSupportedAudioReceiveCodecs(
std::vector<AudioCodec>* codecs) const {
if (!media_engine_) {
return;
}
*codecs = media_engine_->voice().recv_codecs();
}
void ChannelManager::GetSupportedAudioRtpHeaderExtensions(
RtpHeaderExtensions* ext) const {
if (!media_engine_) {
return;
}
*ext = media_engine_->voice().GetCapabilities().header_extensions;
}
void ChannelManager::GetSupportedVideoCodecs(
std::vector<VideoCodec>* codecs) const {
if (!media_engine_) {
return;
}
codecs->clear();
std::vector<VideoCodec> video_codecs = media_engine_->video().codecs();
for (const auto& video_codec : video_codecs) {
if (!enable_rtx_ &&
absl::EqualsIgnoreCase(kRtxCodecName, video_codec.name)) {
continue;
}
codecs->push_back(video_codec);
}
}
void ChannelManager::GetSupportedVideoRtpHeaderExtensions(
RtpHeaderExtensions* ext) const {
if (!media_engine_) {
return;
}
*ext = media_engine_->video().GetCapabilities().header_extensions;
}
void ChannelManager::GetSupportedDataCodecs(
std::vector<DataCodec>* codecs) const {
*codecs = data_engine_->data_codecs();
}
bool ChannelManager::Init() {
RTC_DCHECK(!initialized_);
if (initialized_) {
return false;
}
RTC_DCHECK(network_thread_);
RTC_DCHECK(worker_thread_);
if (!network_thread_->IsCurrent()) {
// Do not allow invoking calls to other threads on the network thread.
network_thread_->Invoke<void>(
RTC_FROM_HERE, [&] { network_thread_->DisallowBlockingCalls(); });
}
if (media_engine_) {
initialized_ = worker_thread_->Invoke<bool>(
RTC_FROM_HERE, [&] { return media_engine_->Init(); });
RTC_DCHECK(initialized_);
} else {
initialized_ = true;
}
return initialized_;
}
void ChannelManager::Terminate() {
RTC_DCHECK(initialized_);
if (!initialized_) {
return;
}
// Need to destroy the channels on the worker thread.
worker_thread_->Invoke<void>(RTC_FROM_HERE, [&] {
video_channels_.clear();
voice_channels_.clear();
data_channels_.clear();
});
initialized_ = false;
}
VoiceChannel* ChannelManager::CreateVoiceChannel(
webrtc::Call* call,
const cricket::MediaConfig& media_config,
webrtc::RtpTransportInternal* rtp_transport,
const webrtc::MediaTransportConfig& media_transport_config,
rtc::Thread* signaling_thread,
const std::string& content_name,
bool srtp_required,
const webrtc::CryptoOptions& crypto_options,
rtc::UniqueRandomIdGenerator* ssrc_generator,
const AudioOptions& options) {
if (!worker_thread_->IsCurrent()) {
return worker_thread_->Invoke<VoiceChannel*>(RTC_FROM_HERE, [&] {
return CreateVoiceChannel(call, media_config, rtp_transport,
media_transport_config, signaling_thread,
content_name, srtp_required, crypto_options,
ssrc_generator, options);
});
}
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DCHECK(initialized_);
RTC_DCHECK(call);
if (!media_engine_) {
return nullptr;
}
VoiceMediaChannel* media_channel = media_engine_->voice().CreateMediaChannel(
call, media_config, options, crypto_options);
if (!media_channel) {
return nullptr;
}
auto voice_channel = absl::make_unique<VoiceChannel>(
worker_thread_, network_thread_, signaling_thread,
absl::WrapUnique(media_channel), content_name, srtp_required,
crypto_options, ssrc_generator);
voice_channel->Init_w(rtp_transport, media_transport_config);
VoiceChannel* voice_channel_ptr = voice_channel.get();
voice_channels_.push_back(std::move(voice_channel));
return voice_channel_ptr;
}
void ChannelManager::DestroyVoiceChannel(VoiceChannel* voice_channel) {
TRACE_EVENT0("webrtc", "ChannelManager::DestroyVoiceChannel");
if (!voice_channel) {
return;
}
if (!worker_thread_->IsCurrent()) {
worker_thread_->Invoke<void>(RTC_FROM_HERE,
[&] { DestroyVoiceChannel(voice_channel); });
return;
}
RTC_DCHECK(initialized_);
auto it = absl::c_find_if(voice_channels_,
[&](const std::unique_ptr<VoiceChannel>& p) {
return p.get() == voice_channel;
});
RTC_DCHECK(it != voice_channels_.end());
if (it == voice_channels_.end()) {
return;
}
voice_channels_.erase(it);
}
VideoChannel* ChannelManager::CreateVideoChannel(
webrtc::Call* call,
const cricket::MediaConfig& media_config,
webrtc::RtpTransportInternal* rtp_transport,
const webrtc::MediaTransportConfig& media_transport_config,
rtc::Thread* signaling_thread,
const std::string& content_name,
bool srtp_required,
const webrtc::CryptoOptions& crypto_options,
rtc::UniqueRandomIdGenerator* ssrc_generator,
const VideoOptions& options,
webrtc::VideoBitrateAllocatorFactory* video_bitrate_allocator_factory) {
if (!worker_thread_->IsCurrent()) {
return worker_thread_->Invoke<VideoChannel*>(RTC_FROM_HERE, [&] {
return CreateVideoChannel(
call, media_config, rtp_transport, media_transport_config,
signaling_thread, content_name, srtp_required, crypto_options,
ssrc_generator, options, video_bitrate_allocator_factory);
});
}
RTC_DCHECK_RUN_ON(worker_thread_);
RTC_DCHECK(initialized_);
RTC_DCHECK(call);
if (!media_engine_) {
return nullptr;
}
VideoMediaChannel* media_channel = media_engine_->video().CreateMediaChannel(
call, media_config, options, crypto_options,
video_bitrate_allocator_factory);
if (!media_channel) {
return nullptr;
}
auto video_channel = absl::make_unique<VideoChannel>(
worker_thread_, network_thread_, signaling_thread,
absl::WrapUnique(media_channel), content_name, srtp_required,
crypto_options, ssrc_generator);
video_channel->Init_w(rtp_transport, media_transport_config);
VideoChannel* video_channel_ptr = video_channel.get();
video_channels_.push_back(std::move(video_channel));
return video_channel_ptr;
}
void ChannelManager::DestroyVideoChannel(VideoChannel* video_channel) {
TRACE_EVENT0("webrtc", "ChannelManager::DestroyVideoChannel");
if (!video_channel) {
return;
}
if (!worker_thread_->IsCurrent()) {
worker_thread_->Invoke<void>(RTC_FROM_HERE,
[&] { DestroyVideoChannel(video_channel); });
return;
}
RTC_DCHECK(initialized_);
auto it = absl::c_find_if(video_channels_,
[&](const std::unique_ptr<VideoChannel>& p) {
return p.get() == video_channel;
});
RTC_DCHECK(it != video_channels_.end());
if (it == video_channels_.end()) {
return;
}
video_channels_.erase(it);
}
RtpDataChannel* ChannelManager::CreateRtpDataChannel(
const cricket::MediaConfig& media_config,
webrtc::RtpTransportInternal* rtp_transport,
rtc::Thread* signaling_thread,
const std::string& content_name,
bool srtp_required,
const webrtc::CryptoOptions& crypto_options,
rtc::UniqueRandomIdGenerator* ssrc_generator) {
if (!worker_thread_->IsCurrent()) {
return worker_thread_->Invoke<RtpDataChannel*>(RTC_FROM_HERE, [&] {
return CreateRtpDataChannel(media_config, rtp_transport, signaling_thread,
content_name, srtp_required, crypto_options,
ssrc_generator);
});
}
// This is ok to alloc from a thread other than the worker thread.
RTC_DCHECK(initialized_);
DataMediaChannel* media_channel = data_engine_->CreateChannel(media_config);
if (!media_channel) {
RTC_LOG(LS_WARNING) << "Failed to create RTP data channel.";
return nullptr;
}
auto data_channel = absl::make_unique<RtpDataChannel>(
worker_thread_, network_thread_, signaling_thread,
absl::WrapUnique(media_channel), content_name, srtp_required,
crypto_options, ssrc_generator);
// Media Transports are not supported with Rtp Data Channel.
data_channel->Init_w(rtp_transport, webrtc::MediaTransportConfig());
RtpDataChannel* data_channel_ptr = data_channel.get();
data_channels_.push_back(std::move(data_channel));
return data_channel_ptr;
}
void ChannelManager::DestroyRtpDataChannel(RtpDataChannel* data_channel) {
TRACE_EVENT0("webrtc", "ChannelManager::DestroyRtpDataChannel");
if (!data_channel) {
return;
}
if (!worker_thread_->IsCurrent()) {
worker_thread_->Invoke<void>(
RTC_FROM_HERE, [&] { return DestroyRtpDataChannel(data_channel); });
return;
}
RTC_DCHECK(initialized_);
auto it = absl::c_find_if(data_channels_,
[&](const std::unique_ptr<RtpDataChannel>& p) {
return p.get() == data_channel;
});
RTC_DCHECK(it != data_channels_.end());
if (it == data_channels_.end()) {
return;
}
data_channels_.erase(it);
}
bool ChannelManager::StartAecDump(webrtc::FileWrapper file,
int64_t max_size_bytes) {
return worker_thread_->Invoke<bool>(RTC_FROM_HERE, [&] {
return media_engine_->voice().StartAecDump(std::move(file), max_size_bytes);
});
}
void ChannelManager::StopAecDump() {
worker_thread_->Invoke<void>(RTC_FROM_HERE,
[&] { media_engine_->voice().StopAecDump(); });
}
} // namespace cricket