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webrtc / src / 3d7db263b902f319b5b0c828ccff59cd8664b937 / . / webrtc / call / call.cc
blob: 23173decc63fbf28fcad49fdaef2886ec90a2682 [file] [log] [blame]
/*
* Copyright (c) 2013 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 <string.h>
#include <map>
#include <memory>
#include <vector>
#include "webrtc/audio/audio_receive_stream.h"
#include "webrtc/audio/audio_send_stream.h"
#include "webrtc/audio/audio_state.h"
#include "webrtc/audio/scoped_voe_interface.h"
#include "webrtc/base/checks.h"
#include "webrtc/base/constructormagic.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/thread_annotations.h"
#include "webrtc/base/thread_checker.h"
#include "webrtc/base/trace_event.h"
#include "webrtc/call.h"
#include "webrtc/call/bitrate_allocator.h"
#include "webrtc/call/rtc_event_log.h"
#include "webrtc/config.h"
#include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
#include "webrtc/modules/congestion_controller/include/congestion_controller.h"
#include "webrtc/modules/pacing/paced_sender.h"
#include "webrtc/modules/rtp_rtcp/include/rtp_header_parser.h"
#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
#include "webrtc/modules/utility/include/process_thread.h"
#include "webrtc/system_wrappers/include/cpu_info.h"
#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
#include "webrtc/system_wrappers/include/metrics.h"
#include "webrtc/system_wrappers/include/rw_lock_wrapper.h"
#include "webrtc/system_wrappers/include/trace.h"
#include "webrtc/video/call_stats.h"
#include "webrtc/video/video_receive_stream.h"
#include "webrtc/video/video_send_stream.h"
#include "webrtc/video/vie_remb.h"
#include "webrtc/voice_engine/include/voe_codec.h"
namespace webrtc {
const int Call::Config::kDefaultStartBitrateBps = 300000;
namespace internal {
class Call : public webrtc::Call, public PacketReceiver,
public BitrateObserver {
public:
explicit Call(const Call::Config& config);
virtual ~Call();
PacketReceiver* Receiver() override;
webrtc::AudioSendStream* CreateAudioSendStream(
const webrtc::AudioSendStream::Config& config) override;
void DestroyAudioSendStream(webrtc::AudioSendStream* send_stream) override;
webrtc::AudioReceiveStream* CreateAudioReceiveStream(
const webrtc::AudioReceiveStream::Config& config) override;
void DestroyAudioReceiveStream(
webrtc::AudioReceiveStream* receive_stream) override;
webrtc::VideoSendStream* CreateVideoSendStream(
const webrtc::VideoSendStream::Config& config,
const VideoEncoderConfig& encoder_config) override;
void DestroyVideoSendStream(webrtc::VideoSendStream* send_stream) override;
webrtc::VideoReceiveStream* CreateVideoReceiveStream(
const webrtc::VideoReceiveStream::Config& config) override;
void DestroyVideoReceiveStream(
webrtc::VideoReceiveStream* receive_stream) override;
Stats GetStats() const override;
DeliveryStatus DeliverPacket(MediaType media_type,
const uint8_t* packet,
size_t length,
const PacketTime& packet_time) override;
void SetBitrateConfig(
const webrtc::Call::Config::BitrateConfig& bitrate_config) override;
void SignalChannelNetworkState(MediaType media, NetworkState state) override;
void OnNetworkRouteChanged(const std::string& transport_name,
const rtc::NetworkRoute& network_route) override;
void OnSentPacket(const rtc::SentPacket& sent_packet) override;
// Implements BitrateObserver.
void OnNetworkChanged(uint32_t bitrate_bps, uint8_t fraction_loss,
int64_t rtt_ms) override;
private:
DeliveryStatus DeliverRtcp(MediaType media_type, const uint8_t* packet,
size_t length);
DeliveryStatus DeliverRtp(MediaType media_type,
const uint8_t* packet,
size_t length,
const PacketTime& packet_time);
void ConfigureSync(const std::string& sync_group)
EXCLUSIVE_LOCKS_REQUIRED(receive_crit_);
VoiceEngine* voice_engine() {
internal::AudioState* audio_state =
static_cast<internal::AudioState*>(config_.audio_state.get());
if (audio_state)
return audio_state->voice_engine();
else
return nullptr;
}
void UpdateSendHistograms() EXCLUSIVE_LOCKS_REQUIRED(&bitrate_crit_);
void UpdateReceiveHistograms();
void UpdateAggregateNetworkState();
Clock* const clock_;
const int num_cpu_cores_;
const std::unique_ptr<ProcessThread> module_process_thread_;
const std::unique_ptr<ProcessThread> pacer_thread_;
const std::unique_ptr<CallStats> call_stats_;
const std::unique_ptr<BitrateAllocator> bitrate_allocator_;
Call::Config config_;
rtc::ThreadChecker configuration_thread_checker_;
NetworkState audio_network_state_;
NetworkState video_network_state_;
std::unique_ptr<RWLockWrapper> receive_crit_;
// Audio and Video receive streams are owned by the client that creates them.
std::map<uint32_t, AudioReceiveStream*> audio_receive_ssrcs_
GUARDED_BY(receive_crit_);
std::map<uint32_t, VideoReceiveStream*> video_receive_ssrcs_
GUARDED_BY(receive_crit_);
std::set<VideoReceiveStream*> video_receive_streams_
GUARDED_BY(receive_crit_);
std::map<std::string, AudioReceiveStream*> sync_stream_mapping_
GUARDED_BY(receive_crit_);
std::unique_ptr<RWLockWrapper> send_crit_;
// Audio and Video send streams are owned by the client that creates them.
std::map<uint32_t, AudioSendStream*> audio_send_ssrcs_ GUARDED_BY(send_crit_);
std::map<uint32_t, VideoSendStream*> video_send_ssrcs_ GUARDED_BY(send_crit_);
std::set<VideoSendStream*> video_send_streams_ GUARDED_BY(send_crit_);
VideoSendStream::RtpStateMap suspended_video_send_ssrcs_;
RtcEventLog* event_log_ = nullptr;
// The following members are only accessed (exclusively) from one thread and
// from the destructor, and therefore doesn't need any explicit
// synchronization.
int64_t received_video_bytes_;
int64_t received_audio_bytes_;
int64_t received_rtcp_bytes_;
int64_t first_rtp_packet_received_ms_;
int64_t last_rtp_packet_received_ms_;
int64_t first_packet_sent_ms_;
// TODO(holmer): Remove this lock once BitrateController no longer calls
// OnNetworkChanged from multiple threads.
rtc::CriticalSection bitrate_crit_;
int64_t estimated_send_bitrate_sum_kbits_ GUARDED_BY(&bitrate_crit_);
int64_t pacer_bitrate_sum_kbits_ GUARDED_BY(&bitrate_crit_);
int64_t num_bitrate_updates_ GUARDED_BY(&bitrate_crit_);
std::map<std::string, rtc::NetworkRoute> network_routes_;
VieRemb remb_;
const std::unique_ptr<CongestionController> congestion_controller_;
RTC_DISALLOW_COPY_AND_ASSIGN(Call);
};
} // namespace internal
Call* Call::Create(const Call::Config& config) {
return new internal::Call(config);
}
namespace internal {
Call::Call(const Call::Config& config)
: clock_(Clock::GetRealTimeClock()),
num_cpu_cores_(CpuInfo::DetectNumberOfCores()),
module_process_thread_(ProcessThread::Create("ModuleProcessThread")),
pacer_thread_(ProcessThread::Create("PacerThread")),
call_stats_(new CallStats(clock_)),
bitrate_allocator_(new BitrateAllocator()),
config_(config),
audio_network_state_(kNetworkUp),
video_network_state_(kNetworkUp),
receive_crit_(RWLockWrapper::CreateRWLock()),
send_crit_(RWLockWrapper::CreateRWLock()),
received_video_bytes_(0),
received_audio_bytes_(0),
received_rtcp_bytes_(0),
first_rtp_packet_received_ms_(-1),
last_rtp_packet_received_ms_(-1),
first_packet_sent_ms_(-1),
estimated_send_bitrate_sum_kbits_(0),
pacer_bitrate_sum_kbits_(0),
num_bitrate_updates_(0),
remb_(clock_),
congestion_controller_(new CongestionController(clock_, this, &remb_)) {
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
RTC_DCHECK_GE(config.bitrate_config.min_bitrate_bps, 0);
RTC_DCHECK_GE(config.bitrate_config.start_bitrate_bps,
config.bitrate_config.min_bitrate_bps);
if (config.bitrate_config.max_bitrate_bps != -1) {
RTC_DCHECK_GE(config.bitrate_config.max_bitrate_bps,
config.bitrate_config.start_bitrate_bps);
}
if (config.audio_state.get()) {
ScopedVoEInterface<VoECodec> voe_codec(voice_engine());
event_log_ = voe_codec->GetEventLog();
}
Trace::CreateTrace();
call_stats_->RegisterStatsObserver(congestion_controller_.get());
congestion_controller_->SetBweBitrates(
config_.bitrate_config.min_bitrate_bps,
config_.bitrate_config.start_bitrate_bps,
config_.bitrate_config.max_bitrate_bps);
congestion_controller_->GetBitrateController()->SetEventLog(event_log_);
module_process_thread_->Start();
module_process_thread_->RegisterModule(call_stats_.get());
module_process_thread_->RegisterModule(congestion_controller_.get());
pacer_thread_->RegisterModule(congestion_controller_->pacer());
pacer_thread_->RegisterModule(
congestion_controller_->GetRemoteBitrateEstimator(true));
pacer_thread_->Start();
}
Call::~Call() {
RTC_DCHECK(!remb_.InUse());
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
UpdateSendHistograms();
UpdateReceiveHistograms();
RTC_CHECK(audio_send_ssrcs_.empty());
RTC_CHECK(video_send_ssrcs_.empty());
RTC_CHECK(video_send_streams_.empty());
RTC_CHECK(audio_receive_ssrcs_.empty());
RTC_CHECK(video_receive_ssrcs_.empty());
RTC_CHECK(video_receive_streams_.empty());
pacer_thread_->Stop();
pacer_thread_->DeRegisterModule(congestion_controller_->pacer());
pacer_thread_->DeRegisterModule(
congestion_controller_->GetRemoteBitrateEstimator(true));
module_process_thread_->DeRegisterModule(congestion_controller_.get());
module_process_thread_->DeRegisterModule(call_stats_.get());
module_process_thread_->Stop();
call_stats_->DeregisterStatsObserver(congestion_controller_.get());
Trace::ReturnTrace();
}
void Call::UpdateSendHistograms() {
if (num_bitrate_updates_ == 0 || first_packet_sent_ms_ == -1)
return;
int64_t elapsed_sec =
(clock_->TimeInMilliseconds() - first_packet_sent_ms_) / 1000;
if (elapsed_sec < metrics::kMinRunTimeInSeconds)
return;
int send_bitrate_kbps =
estimated_send_bitrate_sum_kbits_ / num_bitrate_updates_;
int pacer_bitrate_kbps = pacer_bitrate_sum_kbits_ / num_bitrate_updates_;
if (send_bitrate_kbps > 0) {
RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.EstimatedSendBitrateInKbps",
send_bitrate_kbps);
}
if (pacer_bitrate_kbps > 0) {
RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.PacerBitrateInKbps",
pacer_bitrate_kbps);
}
}
void Call::UpdateReceiveHistograms() {
if (first_rtp_packet_received_ms_ == -1)
return;
int64_t elapsed_sec =
(last_rtp_packet_received_ms_ - first_rtp_packet_received_ms_) / 1000;
if (elapsed_sec < metrics::kMinRunTimeInSeconds)
return;
int audio_bitrate_kbps = received_audio_bytes_ * 8 / elapsed_sec / 1000;
int video_bitrate_kbps = received_video_bytes_ * 8 / elapsed_sec / 1000;
int rtcp_bitrate_bps = received_rtcp_bytes_ * 8 / elapsed_sec;
if (video_bitrate_kbps > 0) {
RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.VideoBitrateReceivedInKbps",
video_bitrate_kbps);
}
if (audio_bitrate_kbps > 0) {
RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.AudioBitrateReceivedInKbps",
audio_bitrate_kbps);
}
if (rtcp_bitrate_bps > 0) {
RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.RtcpBitrateReceivedInBps",
rtcp_bitrate_bps);
}
RTC_LOGGED_HISTOGRAM_COUNTS_100000(
"WebRTC.Call.BitrateReceivedInKbps",
audio_bitrate_kbps + video_bitrate_kbps + rtcp_bitrate_bps / 1000);
}
PacketReceiver* Call::Receiver() {
// TODO(solenberg): Some test cases in EndToEndTest use this from a different
// thread. Re-enable once that is fixed.
// RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
return this;
}
webrtc::AudioSendStream* Call::CreateAudioSendStream(
const webrtc::AudioSendStream::Config& config) {
TRACE_EVENT0("webrtc", "Call::CreateAudioSendStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
AudioSendStream* send_stream = new AudioSendStream(
config, config_.audio_state, congestion_controller_.get());
{
WriteLockScoped write_lock(*send_crit_);
RTC_DCHECK(audio_send_ssrcs_.find(config.rtp.ssrc) ==
audio_send_ssrcs_.end());
audio_send_ssrcs_[config.rtp.ssrc] = send_stream;
}
send_stream->SignalNetworkState(audio_network_state_);
UpdateAggregateNetworkState();
return send_stream;
}
void Call::DestroyAudioSendStream(webrtc::AudioSendStream* send_stream) {
TRACE_EVENT0("webrtc", "Call::DestroyAudioSendStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
RTC_DCHECK(send_stream != nullptr);
send_stream->Stop();
webrtc::internal::AudioSendStream* audio_send_stream =
static_cast<webrtc::internal::AudioSendStream*>(send_stream);
{
WriteLockScoped write_lock(*send_crit_);
size_t num_deleted = audio_send_ssrcs_.erase(
audio_send_stream->config().rtp.ssrc);
RTC_DCHECK(num_deleted == 1);
}
UpdateAggregateNetworkState();
delete audio_send_stream;
}
webrtc::AudioReceiveStream* Call::CreateAudioReceiveStream(
const webrtc::AudioReceiveStream::Config& config) {
TRACE_EVENT0("webrtc", "Call::CreateAudioReceiveStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
AudioReceiveStream* receive_stream = new AudioReceiveStream(
congestion_controller_.get(), config, config_.audio_state);
{
WriteLockScoped write_lock(*receive_crit_);
RTC_DCHECK(audio_receive_ssrcs_.find(config.rtp.remote_ssrc) ==
audio_receive_ssrcs_.end());
audio_receive_ssrcs_[config.rtp.remote_ssrc] = receive_stream;
ConfigureSync(config.sync_group);
}
receive_stream->SignalNetworkState(audio_network_state_);
UpdateAggregateNetworkState();
return receive_stream;
}
void Call::DestroyAudioReceiveStream(
webrtc::AudioReceiveStream* receive_stream) {
TRACE_EVENT0("webrtc", "Call::DestroyAudioReceiveStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
RTC_DCHECK(receive_stream != nullptr);
webrtc::internal::AudioReceiveStream* audio_receive_stream =
static_cast<webrtc::internal::AudioReceiveStream*>(receive_stream);
{
WriteLockScoped write_lock(*receive_crit_);
size_t num_deleted = audio_receive_ssrcs_.erase(
audio_receive_stream->config().rtp.remote_ssrc);
RTC_DCHECK(num_deleted == 1);
const std::string& sync_group = audio_receive_stream->config().sync_group;
const auto it = sync_stream_mapping_.find(sync_group);
if (it != sync_stream_mapping_.end() &&
it->second == audio_receive_stream) {
sync_stream_mapping_.erase(it);
ConfigureSync(sync_group);
}
}
UpdateAggregateNetworkState();
delete audio_receive_stream;
}
webrtc::VideoSendStream* Call::CreateVideoSendStream(
const webrtc::VideoSendStream::Config& config,
const VideoEncoderConfig& encoder_config) {
TRACE_EVENT0("webrtc", "Call::CreateVideoSendStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
// TODO(mflodman): Base the start bitrate on a current bandwidth estimate, if
// the call has already started.
VideoSendStream* send_stream = new VideoSendStream(
num_cpu_cores_, module_process_thread_.get(), call_stats_.get(),
congestion_controller_.get(), bitrate_allocator_.get(), &remb_, config,
encoder_config, suspended_video_send_ssrcs_);
{
WriteLockScoped write_lock(*send_crit_);
for (uint32_t ssrc : config.rtp.ssrcs) {
RTC_DCHECK(video_send_ssrcs_.find(ssrc) == video_send_ssrcs_.end());
video_send_ssrcs_[ssrc] = send_stream;
}
video_send_streams_.insert(send_stream);
}
send_stream->SignalNetworkState(video_network_state_);
UpdateAggregateNetworkState();
if (event_log_)
event_log_->LogVideoSendStreamConfig(config);
return send_stream;
}
void Call::DestroyVideoSendStream(webrtc::VideoSendStream* send_stream) {
TRACE_EVENT0("webrtc", "Call::DestroyVideoSendStream");
RTC_DCHECK(send_stream != nullptr);
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
send_stream->Stop();
VideoSendStream* send_stream_impl = nullptr;
{
WriteLockScoped write_lock(*send_crit_);
auto it = video_send_ssrcs_.begin();
while (it != video_send_ssrcs_.end()) {
if (it->second == static_cast<VideoSendStream*>(send_stream)) {
send_stream_impl = it->second;
video_send_ssrcs_.erase(it++);
} else {
++it;
}
}
video_send_streams_.erase(send_stream_impl);
}
RTC_CHECK(send_stream_impl != nullptr);
VideoSendStream::RtpStateMap rtp_state = send_stream_impl->GetRtpStates();
for (VideoSendStream::RtpStateMap::iterator it = rtp_state.begin();
it != rtp_state.end();
++it) {
suspended_video_send_ssrcs_[it->first] = it->second;
}
UpdateAggregateNetworkState();
delete send_stream_impl;
}
webrtc::VideoReceiveStream* Call::CreateVideoReceiveStream(
const webrtc::VideoReceiveStream::Config& config) {
TRACE_EVENT0("webrtc", "Call::CreateVideoReceiveStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
VideoReceiveStream* receive_stream = new VideoReceiveStream(
num_cpu_cores_, congestion_controller_.get(), config, voice_engine(),
module_process_thread_.get(), call_stats_.get(), &remb_);
{
WriteLockScoped write_lock(*receive_crit_);
RTC_DCHECK(video_receive_ssrcs_.find(config.rtp.remote_ssrc) ==
video_receive_ssrcs_.end());
video_receive_ssrcs_[config.rtp.remote_ssrc] = receive_stream;
// TODO(pbos): Configure different RTX payloads per receive payload.
VideoReceiveStream::Config::Rtp::RtxMap::const_iterator it =
config.rtp.rtx.begin();
if (it != config.rtp.rtx.end())
video_receive_ssrcs_[it->second.ssrc] = receive_stream;
video_receive_streams_.insert(receive_stream);
ConfigureSync(config.sync_group);
}
receive_stream->SignalNetworkState(video_network_state_);
UpdateAggregateNetworkState();
if (event_log_)
event_log_->LogVideoReceiveStreamConfig(config);
return receive_stream;
}
void Call::DestroyVideoReceiveStream(
webrtc::VideoReceiveStream* receive_stream) {
TRACE_EVENT0("webrtc", "Call::DestroyVideoReceiveStream");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
RTC_DCHECK(receive_stream != nullptr);
VideoReceiveStream* receive_stream_impl = nullptr;
{
WriteLockScoped write_lock(*receive_crit_);
// Remove all ssrcs pointing to a receive stream. As RTX retransmits on a
// separate SSRC there can be either one or two.
auto it = video_receive_ssrcs_.begin();
while (it != video_receive_ssrcs_.end()) {
if (it->second == static_cast<VideoReceiveStream*>(receive_stream)) {
if (receive_stream_impl != nullptr)
RTC_DCHECK(receive_stream_impl == it->second);
receive_stream_impl = it->second;
video_receive_ssrcs_.erase(it++);
} else {
++it;
}
}
video_receive_streams_.erase(receive_stream_impl);
RTC_CHECK(receive_stream_impl != nullptr);
ConfigureSync(receive_stream_impl->config().sync_group);
}
UpdateAggregateNetworkState();
delete receive_stream_impl;
}
Call::Stats Call::GetStats() const {
// TODO(solenberg): Some test cases in EndToEndTest use this from a different
// thread. Re-enable once that is fixed.
// RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
Stats stats;
// Fetch available send/receive bitrates.
uint32_t send_bandwidth = 0;
congestion_controller_->GetBitrateController()->AvailableBandwidth(
&send_bandwidth);
std::vector<unsigned int> ssrcs;
uint32_t recv_bandwidth = 0;
congestion_controller_->GetRemoteBitrateEstimator(false)->LatestEstimate(
&ssrcs, &recv_bandwidth);
stats.send_bandwidth_bps = send_bandwidth;
stats.recv_bandwidth_bps = recv_bandwidth;
stats.pacer_delay_ms = congestion_controller_->GetPacerQueuingDelayMs();
stats.rtt_ms = call_stats_->rtcp_rtt_stats()->LastProcessedRtt();
return stats;
}
void Call::SetBitrateConfig(
const webrtc::Call::Config::BitrateConfig& bitrate_config) {
TRACE_EVENT0("webrtc", "Call::SetBitrateConfig");
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
RTC_DCHECK_GE(bitrate_config.min_bitrate_bps, 0);
if (bitrate_config.max_bitrate_bps != -1)
RTC_DCHECK_GT(bitrate_config.max_bitrate_bps, 0);
if (config_.bitrate_config.min_bitrate_bps ==
bitrate_config.min_bitrate_bps &&
(bitrate_config.start_bitrate_bps <= 0 ||
config_.bitrate_config.start_bitrate_bps ==
bitrate_config.start_bitrate_bps) &&
config_.bitrate_config.max_bitrate_bps ==
bitrate_config.max_bitrate_bps) {
// Nothing new to set, early abort to avoid encoder reconfigurations.
return;
}
config_.bitrate_config = bitrate_config;
congestion_controller_->SetBweBitrates(bitrate_config.min_bitrate_bps,
bitrate_config.start_bitrate_bps,
bitrate_config.max_bitrate_bps);
}
void Call::SignalChannelNetworkState(MediaType media, NetworkState state) {
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
switch (media) {
case MediaType::AUDIO:
audio_network_state_ = state;
break;
case MediaType::VIDEO:
video_network_state_ = state;
break;
case MediaType::ANY:
case MediaType::DATA:
RTC_NOTREACHED();
break;
}
UpdateAggregateNetworkState();
{
ReadLockScoped read_lock(*send_crit_);
for (auto& kv : audio_send_ssrcs_) {
kv.second->SignalNetworkState(audio_network_state_);
}
for (auto& kv : video_send_ssrcs_) {
kv.second->SignalNetworkState(video_network_state_);
}
}
{
ReadLockScoped read_lock(*receive_crit_);
for (auto& kv : audio_receive_ssrcs_) {
kv.second->SignalNetworkState(audio_network_state_);
}
for (auto& kv : video_receive_ssrcs_) {
kv.second->SignalNetworkState(video_network_state_);
}
}
}
// TODO(honghaiz): Add tests for this method.
void Call::OnNetworkRouteChanged(const std::string& transport_name,
const rtc::NetworkRoute& network_route) {
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
// Check if the network route is connected.
if (!network_route.connected) {
LOG(LS_INFO) << "Transport " << transport_name << " is disconnected";
// TODO(honghaiz): Perhaps handle this in SignalChannelNetworkState and
// consider merging these two methods.
return;
}
// Check whether the network route has changed on each transport.
auto result =
network_routes_.insert(std::make_pair(transport_name, network_route));
auto kv = result.first;
bool inserted = result.second;
if (inserted) {
// No need to reset BWE if this is the first time the network connects.
return;
}
if (kv->second != network_route) {
kv->second = network_route;
LOG(LS_INFO) << "Network route changed on transport " << transport_name
<< ": new local network id " << network_route.local_network_id
<< " new remote network id "
<< network_route.remote_network_id;
// TODO(holmer): Update the BWE bitrates.
}
}
void Call::UpdateAggregateNetworkState() {
RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread());
bool have_audio = false;
bool have_video = false;
{
ReadLockScoped read_lock(*send_crit_);
if (audio_send_ssrcs_.size() > 0)
have_audio = true;
if (video_send_ssrcs_.size() > 0)
have_video = true;
}
{
ReadLockScoped read_lock(*receive_crit_);
if (audio_receive_ssrcs_.size() > 0)
have_audio = true;
if (video_receive_ssrcs_.size() > 0)
have_video = true;
}
NetworkState aggregate_state = kNetworkDown;
if ((have_video && video_network_state_ == kNetworkUp) ||
(have_audio && audio_network_state_ == kNetworkUp)) {
aggregate_state = kNetworkUp;
}
LOG(LS_INFO) << "UpdateAggregateNetworkState: aggregate_state="
<< (aggregate_state == kNetworkUp ? "up" : "down");
congestion_controller_->SignalNetworkState(aggregate_state);
}
void Call::OnSentPacket(const rtc::SentPacket& sent_packet) {
if (first_packet_sent_ms_ == -1)
first_packet_sent_ms_ = clock_->TimeInMilliseconds();
congestion_controller_->OnSentPacket(sent_packet);
}
void Call::OnNetworkChanged(uint32_t target_bitrate_bps, uint8_t fraction_loss,
int64_t rtt_ms) {
uint32_t allocated_bitrate_bps = bitrate_allocator_->OnNetworkChanged(
target_bitrate_bps, fraction_loss, rtt_ms);
int pad_up_to_bitrate_bps = 0;
{
ReadLockScoped read_lock(*send_crit_);
// No need to update as long as we're not sending.
if (video_send_streams_.empty())
return;
for (VideoSendStream* stream : video_send_streams_)
pad_up_to_bitrate_bps += stream->GetPaddingNeededBps();
}
// Allocated bitrate might be higher than bitrate estimate if enforcing min
// bitrate, or lower if estimate is higher than the sum of max bitrates, so
// set the pacer bitrate to the maximum of the two.
uint32_t pacer_bitrate_bps =
std::max(target_bitrate_bps, allocated_bitrate_bps);
{
rtc::CritScope lock(&bitrate_crit_);
// We only update these stats if we have send streams, and assume that
// OnNetworkChanged is called roughly with a fixed frequency.
estimated_send_bitrate_sum_kbits_ += target_bitrate_bps / 1000;
pacer_bitrate_sum_kbits_ += pacer_bitrate_bps / 1000;
++num_bitrate_updates_;
}
congestion_controller_->UpdatePacerBitrate(
target_bitrate_bps / 1000,
PacedSender::kDefaultPaceMultiplier * pacer_bitrate_bps / 1000,
pad_up_to_bitrate_bps / 1000);
}
void Call::ConfigureSync(const std::string& sync_group) {
// Set sync only if there was no previous one.
if (voice_engine() == nullptr || sync_group.empty())
return;
AudioReceiveStream* sync_audio_stream = nullptr;
// Find existing audio stream.
const auto it = sync_stream_mapping_.find(sync_group);
if (it != sync_stream_mapping_.end()) {
sync_audio_stream = it->second;
} else {
// No configured audio stream, see if we can find one.
for (const auto& kv : audio_receive_ssrcs_) {
if (kv.second->config().sync_group == sync_group) {
if (sync_audio_stream != nullptr) {
LOG(LS_WARNING) << "Attempting to sync more than one audio stream "
"within the same sync group. This is not "
"supported in the current implementation.";
break;
}
sync_audio_stream = kv.second;
}
}
}
if (sync_audio_stream)
sync_stream_mapping_[sync_group] = sync_audio_stream;
size_t num_synced_streams = 0;
for (VideoReceiveStream* video_stream : video_receive_streams_) {
if (video_stream->config().sync_group != sync_group)
continue;
++num_synced_streams;
if (num_synced_streams > 1) {
// TODO(pbos): Support synchronizing more than one A/V pair.
// https://code.google.com/p/webrtc/issues/detail?id=4762
LOG(LS_WARNING) << "Attempting to sync more than one audio/video pair "
"within the same sync group. This is not supported in "
"the current implementation.";
}
// Only sync the first A/V pair within this sync group.
if (sync_audio_stream != nullptr && num_synced_streams == 1) {
video_stream->SetSyncChannel(voice_engine(),
sync_audio_stream->config().voe_channel_id);
} else {
video_stream->SetSyncChannel(voice_engine(), -1);
}
}
}
PacketReceiver::DeliveryStatus Call::DeliverRtcp(MediaType media_type,
const uint8_t* packet,
size_t length) {
TRACE_EVENT0("webrtc", "Call::DeliverRtcp");
// TODO(pbos): Make sure it's a valid packet.
// Return DELIVERY_UNKNOWN_SSRC if it can be determined that
// there's no receiver of the packet.
received_rtcp_bytes_ += length;
bool rtcp_delivered = false;
if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) {
ReadLockScoped read_lock(*receive_crit_);
for (VideoReceiveStream* stream : video_receive_streams_) {
if (stream->DeliverRtcp(packet, length))
rtcp_delivered = true;
}
}
if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) {
ReadLockScoped read_lock(*receive_crit_);
for (auto& kv : audio_receive_ssrcs_) {
if (kv.second->DeliverRtcp(packet, length))
rtcp_delivered = true;
}
}
if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) {
ReadLockScoped read_lock(*send_crit_);
for (VideoSendStream* stream : video_send_streams_) {
if (stream->DeliverRtcp(packet, length))
rtcp_delivered = true;
}
}
if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) {
ReadLockScoped read_lock(*send_crit_);
for (auto& kv : audio_send_ssrcs_) {
if (kv.second->DeliverRtcp(packet, length))
rtcp_delivered = true;
}
}
if (event_log_ && rtcp_delivered)
event_log_->LogRtcpPacket(kIncomingPacket, media_type, packet, length);
return rtcp_delivered ? DELIVERY_OK : DELIVERY_PACKET_ERROR;
}
PacketReceiver::DeliveryStatus Call::DeliverRtp(MediaType media_type,
const uint8_t* packet,
size_t length,
const PacketTime& packet_time) {
TRACE_EVENT0("webrtc", "Call::DeliverRtp");
// Minimum RTP header size.
if (length < 12)
return DELIVERY_PACKET_ERROR;
last_rtp_packet_received_ms_ = clock_->TimeInMilliseconds();
if (first_rtp_packet_received_ms_ == -1)
first_rtp_packet_received_ms_ = last_rtp_packet_received_ms_;
uint32_t ssrc = ByteReader<uint32_t>::ReadBigEndian(&packet[8]);
ReadLockScoped read_lock(*receive_crit_);
if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) {
auto it = audio_receive_ssrcs_.find(ssrc);
if (it != audio_receive_ssrcs_.end()) {
received_audio_bytes_ += length;
auto status = it->second->DeliverRtp(packet, length, packet_time)
? DELIVERY_OK
: DELIVERY_PACKET_ERROR;
if (status == DELIVERY_OK && event_log_)
event_log_->LogRtpHeader(kIncomingPacket, media_type, packet, length);
return status;
}
}
if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) {
auto it = video_receive_ssrcs_.find(ssrc);
if (it != video_receive_ssrcs_.end()) {
received_video_bytes_ += length;
auto status = it->second->DeliverRtp(packet, length, packet_time)
? DELIVERY_OK
: DELIVERY_PACKET_ERROR;
if (status == DELIVERY_OK && event_log_)
event_log_->LogRtpHeader(kIncomingPacket, media_type, packet, length);
return status;
}
}
return DELIVERY_UNKNOWN_SSRC;
}
PacketReceiver::DeliveryStatus Call::DeliverPacket(
MediaType media_type,
const uint8_t* packet,
size_t length,
const PacketTime& packet_time) {
// TODO(solenberg): Tests call this function on a network thread, libjingle
// calls on the worker thread. We should move towards always using a network
// thread. Then this check can be enabled.
// RTC_DCHECK(!configuration_thread_checker_.CalledOnValidThread());
if (RtpHeaderParser::IsRtcp(packet, length))
return DeliverRtcp(media_type, packet, length);
return DeliverRtp(media_type, packet, length, packet_time);
}
} // namespace internal
} // namespace webrtc