408 lines
15 KiB
C++
408 lines
15 KiB
C++
/*
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* Copyright 2004 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "pc/peer_connection_factory.h"
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#include <cstdio>
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#include <memory>
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#include <utility>
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#include <vector>
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#include "absl/strings/match.h"
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#include "api/fec_controller.h"
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#include "api/media_stream_proxy.h"
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#include "api/media_stream_track_proxy.h"
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#include "api/network_state_predictor.h"
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#include "api/peer_connection_factory_proxy.h"
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#include "api/peer_connection_proxy.h"
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#include "api/rtc_event_log/rtc_event_log.h"
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#include "api/transport/field_trial_based_config.h"
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#include "api/turn_customizer.h"
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#include "api/units/data_rate.h"
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#include "api/video_track_source_proxy.h"
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#include "media/base/rtp_data_engine.h"
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#include "media/sctp/sctp_transport.h"
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#include "p2p/base/basic_async_resolver_factory.h"
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#include "p2p/base/basic_packet_socket_factory.h"
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#include "p2p/base/default_ice_transport_factory.h"
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#include "p2p/client/basic_port_allocator.h"
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#include "pc/audio_track.h"
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#include "pc/local_audio_source.h"
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#include "pc/media_stream.h"
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#include "pc/peer_connection.h"
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#include "pc/rtp_parameters_conversion.h"
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#include "pc/video_track.h"
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#include "rtc_base/bind.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/experiments/field_trial_parser.h"
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#include "rtc_base/experiments/field_trial_units.h"
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#include "rtc_base/numerics/safe_conversions.h"
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#include "rtc_base/system/file_wrapper.h"
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namespace webrtc {
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rtc::scoped_refptr<PeerConnectionFactoryInterface>
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CreateModularPeerConnectionFactory(
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PeerConnectionFactoryDependencies dependencies) {
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rtc::scoped_refptr<PeerConnectionFactory> pc_factory(
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new rtc::RefCountedObject<PeerConnectionFactory>(
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std::move(dependencies)));
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// Call Initialize synchronously but make sure it is executed on
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// |signaling_thread|.
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MethodCall<PeerConnectionFactory, bool> call(
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pc_factory.get(), &PeerConnectionFactory::Initialize);
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bool result = call.Marshal(RTC_FROM_HERE, pc_factory->signaling_thread());
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if (!result) {
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return nullptr;
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}
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return PeerConnectionFactoryProxy::Create(pc_factory->signaling_thread(),
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pc_factory);
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}
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PeerConnectionFactory::PeerConnectionFactory(
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PeerConnectionFactoryDependencies dependencies)
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: wraps_current_thread_(false),
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network_thread_(dependencies.network_thread),
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worker_thread_(dependencies.worker_thread),
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signaling_thread_(dependencies.signaling_thread),
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task_queue_factory_(std::move(dependencies.task_queue_factory)),
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media_engine_(std::move(dependencies.media_engine)),
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call_factory_(std::move(dependencies.call_factory)),
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event_log_factory_(std::move(dependencies.event_log_factory)),
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fec_controller_factory_(std::move(dependencies.fec_controller_factory)),
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network_state_predictor_factory_(
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std::move(dependencies.network_state_predictor_factory)),
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injected_network_controller_factory_(
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std::move(dependencies.network_controller_factory)),
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neteq_factory_(std::move(dependencies.neteq_factory)),
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trials_(dependencies.trials ? std::move(dependencies.trials)
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: std::make_unique<FieldTrialBasedConfig>()) {
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if (!network_thread_) {
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owned_network_thread_ = rtc::Thread::CreateWithSocketServer();
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owned_network_thread_->SetName("pc_network_thread", nullptr);
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owned_network_thread_->Start();
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network_thread_ = owned_network_thread_.get();
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}
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if (!worker_thread_) {
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owned_worker_thread_ = rtc::Thread::Create();
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owned_worker_thread_->SetName("pc_worker_thread", nullptr);
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owned_worker_thread_->Start();
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worker_thread_ = owned_worker_thread_.get();
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}
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if (!signaling_thread_) {
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signaling_thread_ = rtc::Thread::Current();
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if (!signaling_thread_) {
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// If this thread isn't already wrapped by an rtc::Thread, create a
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// wrapper and own it in this class.
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signaling_thread_ = rtc::ThreadManager::Instance()->WrapCurrentThread();
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wraps_current_thread_ = true;
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}
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}
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signaling_thread_->AllowInvokesToThread(worker_thread_);
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signaling_thread_->AllowInvokesToThread(network_thread_);
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worker_thread_->AllowInvokesToThread(network_thread_);
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network_thread_->DisallowAllInvokes();
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}
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PeerConnectionFactory::~PeerConnectionFactory() {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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channel_manager_.reset(nullptr);
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// Make sure |worker_thread_| and |signaling_thread_| outlive
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// |default_socket_factory_| and |default_network_manager_|.
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default_socket_factory_ = nullptr;
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default_network_manager_ = nullptr;
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if (wraps_current_thread_)
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rtc::ThreadManager::Instance()->UnwrapCurrentThread();
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}
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bool PeerConnectionFactory::Initialize() {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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rtc::InitRandom(rtc::Time32());
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default_network_manager_.reset(new rtc::BasicNetworkManager());
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if (!default_network_manager_) {
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return false;
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}
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default_socket_factory_.reset(
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new rtc::BasicPacketSocketFactory(network_thread_));
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if (!default_socket_factory_) {
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return false;
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}
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channel_manager_ = std::make_unique<cricket::ChannelManager>(
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std::move(media_engine_), std::make_unique<cricket::RtpDataEngine>(),
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worker_thread_, network_thread_);
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channel_manager_->SetVideoRtxEnabled(true);
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if (!channel_manager_->Init()) {
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return false;
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}
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return true;
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}
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void PeerConnectionFactory::SetOptions(const Options& options) {
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options_ = options;
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}
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RtpCapabilities PeerConnectionFactory::GetRtpSenderCapabilities(
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cricket::MediaType kind) const {
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RTC_DCHECK_RUN_ON(signaling_thread_);
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switch (kind) {
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case cricket::MEDIA_TYPE_AUDIO: {
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cricket::AudioCodecs cricket_codecs;
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channel_manager_->GetSupportedAudioSendCodecs(&cricket_codecs);
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return ToRtpCapabilities(
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cricket_codecs,
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channel_manager_->GetDefaultEnabledAudioRtpHeaderExtensions());
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}
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case cricket::MEDIA_TYPE_VIDEO: {
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cricket::VideoCodecs cricket_codecs;
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channel_manager_->GetSupportedVideoSendCodecs(&cricket_codecs);
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return ToRtpCapabilities(
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cricket_codecs,
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channel_manager_->GetDefaultEnabledVideoRtpHeaderExtensions());
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}
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case cricket::MEDIA_TYPE_DATA:
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return RtpCapabilities();
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}
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// Not reached; avoids compile warning.
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FATAL();
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}
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RtpCapabilities PeerConnectionFactory::GetRtpReceiverCapabilities(
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cricket::MediaType kind) const {
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RTC_DCHECK_RUN_ON(signaling_thread_);
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switch (kind) {
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case cricket::MEDIA_TYPE_AUDIO: {
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cricket::AudioCodecs cricket_codecs;
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channel_manager_->GetSupportedAudioReceiveCodecs(&cricket_codecs);
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return ToRtpCapabilities(
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cricket_codecs,
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channel_manager_->GetDefaultEnabledAudioRtpHeaderExtensions());
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}
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case cricket::MEDIA_TYPE_VIDEO: {
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cricket::VideoCodecs cricket_codecs;
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channel_manager_->GetSupportedVideoReceiveCodecs(&cricket_codecs);
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return ToRtpCapabilities(
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cricket_codecs,
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channel_manager_->GetDefaultEnabledVideoRtpHeaderExtensions());
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}
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case cricket::MEDIA_TYPE_DATA:
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return RtpCapabilities();
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}
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// Not reached; avoids compile warning.
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FATAL();
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}
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rtc::scoped_refptr<AudioSourceInterface>
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PeerConnectionFactory::CreateAudioSource(const cricket::AudioOptions& options) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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rtc::scoped_refptr<LocalAudioSource> source(
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LocalAudioSource::Create(&options));
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return source;
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}
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bool PeerConnectionFactory::StartAecDump(FILE* file, int64_t max_size_bytes) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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return channel_manager_->StartAecDump(FileWrapper(file), max_size_bytes);
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}
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void PeerConnectionFactory::StopAecDump() {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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channel_manager_->StopAecDump();
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}
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rtc::scoped_refptr<PeerConnectionInterface>
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PeerConnectionFactory::CreatePeerConnection(
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const PeerConnectionInterface::RTCConfiguration& configuration,
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std::unique_ptr<cricket::PortAllocator> allocator,
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std::unique_ptr<rtc::RTCCertificateGeneratorInterface> cert_generator,
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PeerConnectionObserver* observer) {
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// Convert the legacy API into the new dependency structure.
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PeerConnectionDependencies dependencies(observer);
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dependencies.allocator = std::move(allocator);
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dependencies.cert_generator = std::move(cert_generator);
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// Pass that into the new API.
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return CreatePeerConnection(configuration, std::move(dependencies));
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}
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rtc::scoped_refptr<PeerConnectionInterface>
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PeerConnectionFactory::CreatePeerConnection(
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const PeerConnectionInterface::RTCConfiguration& configuration,
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PeerConnectionDependencies dependencies) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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RTC_DCHECK(!(dependencies.allocator && dependencies.packet_socket_factory))
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<< "You can't set both allocator and packet_socket_factory; "
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"the former is going away (see bugs.webrtc.org/7447";
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// Set internal defaults if optional dependencies are not set.
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if (!dependencies.cert_generator) {
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dependencies.cert_generator =
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std::make_unique<rtc::RTCCertificateGenerator>(signaling_thread_,
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network_thread_);
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}
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if (!dependencies.allocator) {
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rtc::PacketSocketFactory* packet_socket_factory;
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if (dependencies.packet_socket_factory)
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packet_socket_factory = dependencies.packet_socket_factory.get();
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else
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packet_socket_factory = default_socket_factory_.get();
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network_thread_->Invoke<void>(RTC_FROM_HERE, [this, &configuration,
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&dependencies,
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&packet_socket_factory]() {
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dependencies.allocator = std::make_unique<cricket::BasicPortAllocator>(
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default_network_manager_.get(), packet_socket_factory,
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configuration.turn_customizer);
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});
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}
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if (!dependencies.async_resolver_factory) {
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dependencies.async_resolver_factory =
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std::make_unique<webrtc::BasicAsyncResolverFactory>();
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}
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if (!dependencies.ice_transport_factory) {
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dependencies.ice_transport_factory =
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std::make_unique<DefaultIceTransportFactory>();
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}
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network_thread_->Invoke<void>(
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RTC_FROM_HERE,
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rtc::Bind(&cricket::PortAllocator::SetNetworkIgnoreMask,
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dependencies.allocator.get(), options_.network_ignore_mask));
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std::unique_ptr<RtcEventLog> event_log =
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worker_thread_->Invoke<std::unique_ptr<RtcEventLog>>(
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RTC_FROM_HERE,
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rtc::Bind(&PeerConnectionFactory::CreateRtcEventLog_w, this));
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std::unique_ptr<Call> call = worker_thread_->Invoke<std::unique_ptr<Call>>(
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RTC_FROM_HERE,
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rtc::Bind(&PeerConnectionFactory::CreateCall_w, this, event_log.get()));
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rtc::scoped_refptr<PeerConnection> pc(
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new rtc::RefCountedObject<PeerConnection>(this, std::move(event_log),
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std::move(call)));
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ActionsBeforeInitializeForTesting(pc);
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if (!pc->Initialize(configuration, std::move(dependencies))) {
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return nullptr;
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}
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return PeerConnectionProxy::Create(signaling_thread(), pc);
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}
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rtc::scoped_refptr<MediaStreamInterface>
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PeerConnectionFactory::CreateLocalMediaStream(const std::string& stream_id) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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return MediaStreamProxy::Create(signaling_thread_,
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MediaStream::Create(stream_id));
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}
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rtc::scoped_refptr<VideoTrackInterface> PeerConnectionFactory::CreateVideoTrack(
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const std::string& id,
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VideoTrackSourceInterface* source) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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rtc::scoped_refptr<VideoTrackInterface> track(
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VideoTrack::Create(id, source, worker_thread_));
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return VideoTrackProxy::Create(signaling_thread_, worker_thread_, track);
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}
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rtc::scoped_refptr<AudioTrackInterface> PeerConnectionFactory::CreateAudioTrack(
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const std::string& id,
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AudioSourceInterface* source) {
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RTC_DCHECK(signaling_thread_->IsCurrent());
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rtc::scoped_refptr<AudioTrackInterface> track(AudioTrack::Create(id, source));
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return AudioTrackProxy::Create(signaling_thread_, track);
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}
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std::unique_ptr<cricket::SctpTransportInternalFactory>
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PeerConnectionFactory::CreateSctpTransportInternalFactory() {
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#ifdef HAVE_SCTP
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return std::make_unique<cricket::SctpTransportFactory>(network_thread());
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#else
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return nullptr;
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#endif
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}
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cricket::ChannelManager* PeerConnectionFactory::channel_manager() {
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return channel_manager_.get();
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}
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std::unique_ptr<RtcEventLog> PeerConnectionFactory::CreateRtcEventLog_w() {
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RTC_DCHECK_RUN_ON(worker_thread_);
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auto encoding_type = RtcEventLog::EncodingType::Legacy;
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if (IsTrialEnabled("WebRTC-RtcEventLogNewFormat"))
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encoding_type = RtcEventLog::EncodingType::NewFormat;
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return event_log_factory_
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? event_log_factory_->CreateRtcEventLog(encoding_type)
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: std::make_unique<RtcEventLogNull>();
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}
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std::unique_ptr<Call> PeerConnectionFactory::CreateCall_w(
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RtcEventLog* event_log) {
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RTC_DCHECK_RUN_ON(worker_thread_);
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webrtc::Call::Config call_config(event_log);
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if (!channel_manager_->media_engine() || !call_factory_) {
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return nullptr;
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}
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call_config.audio_state =
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channel_manager_->media_engine()->voice().GetAudioState();
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FieldTrialParameter<DataRate> min_bandwidth("min",
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DataRate::KilobitsPerSec(30));
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FieldTrialParameter<DataRate> start_bandwidth("start",
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DataRate::KilobitsPerSec(300));
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FieldTrialParameter<DataRate> max_bandwidth("max",
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DataRate::KilobitsPerSec(2000));
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ParseFieldTrial({&min_bandwidth, &start_bandwidth, &max_bandwidth},
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trials_->Lookup("WebRTC-PcFactoryDefaultBitrates"));
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call_config.bitrate_config.min_bitrate_bps =
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rtc::saturated_cast<int>(min_bandwidth->bps());
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call_config.bitrate_config.start_bitrate_bps =
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rtc::saturated_cast<int>(start_bandwidth->bps());
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call_config.bitrate_config.max_bitrate_bps =
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rtc::saturated_cast<int>(max_bandwidth->bps());
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call_config.fec_controller_factory = fec_controller_factory_.get();
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call_config.task_queue_factory = task_queue_factory_.get();
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call_config.network_state_predictor_factory =
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network_state_predictor_factory_.get();
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call_config.neteq_factory = neteq_factory_.get();
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if (IsTrialEnabled("WebRTC-Bwe-InjectedCongestionController")) {
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RTC_LOG(LS_INFO) << "Using injected network controller factory";
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call_config.network_controller_factory =
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injected_network_controller_factory_.get();
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} else {
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RTC_LOG(LS_INFO) << "Using default network controller factory";
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}
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call_config.trials = trials_.get();
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return std::unique_ptr<Call>(call_factory_->CreateCall(call_config));
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}
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bool PeerConnectionFactory::IsTrialEnabled(absl::string_view key) const {
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RTC_DCHECK(trials_);
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return absl::StartsWith(trials_->Lookup(key), "Enabled");
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}
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} // namespace webrtc
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