| /* |
| * Copyright 2018 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 "video/video_send_stream_impl.h" |
| |
| #include <algorithm> |
| #include <string> |
| #include <utility> |
| |
| #include "call/rtp_transport_controller_send_interface.h" |
| #include "modules/pacing/packet_router.h" |
| #include "modules/rtp_rtcp/source/rtp_sender.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/experiments/alr_experiment.h" |
| #include "rtc_base/file.h" |
| #include "rtc_base/location.h" |
| #include "rtc_base/logging.h" |
| #include "rtc_base/numerics/safe_conversions.h" |
| #include "rtc_base/trace_event.h" |
| #include "system_wrappers/include/field_trial.h" |
| |
| namespace webrtc { |
| namespace internal { |
| namespace { |
| // Assume an average video stream has around 3 packets per frame (1 mbps / 30 |
| // fps / 1400B) A sequence number set with size 5500 will be able to store |
| // packet sequence number for at least last 60 seconds. |
| static const int kSendSideSeqNumSetMaxSize = 5500; |
| |
| // We don't do MTU discovery, so assume that we have the standard ethernet MTU. |
| const size_t kPathMTU = 1500; |
| |
| bool TransportSeqNumExtensionConfigured(const VideoSendStream::Config& config) { |
| const std::vector<RtpExtension>& extensions = config.rtp.extensions; |
| return std::find_if( |
| extensions.begin(), extensions.end(), [](const RtpExtension& ext) { |
| return ext.uri == RtpExtension::kTransportSequenceNumberUri; |
| }) != extensions.end(); |
| } |
| |
| const char kForcedFallbackFieldTrial[] = |
| "WebRTC-VP8-Forced-Fallback-Encoder-v2"; |
| |
| absl::optional<int> GetFallbackMinBpsFromFieldTrial() { |
| if (!webrtc::field_trial::IsEnabled(kForcedFallbackFieldTrial)) |
| return absl::nullopt; |
| |
| std::string group = |
| webrtc::field_trial::FindFullName(kForcedFallbackFieldTrial); |
| if (group.empty()) |
| return absl::nullopt; |
| |
| int min_pixels; |
| int max_pixels; |
| int min_bps; |
| if (sscanf(group.c_str(), "Enabled-%d,%d,%d", &min_pixels, &max_pixels, |
| &min_bps) != 3) { |
| return absl::nullopt; |
| } |
| |
| if (min_bps <= 0) |
| return absl::nullopt; |
| |
| return min_bps; |
| } |
| |
| int GetEncoderMinBitrateBps() { |
| const int kDefaultEncoderMinBitrateBps = 30000; |
| return GetFallbackMinBpsFromFieldTrial().value_or( |
| kDefaultEncoderMinBitrateBps); |
| } |
| |
| int CalculateMaxPadBitrateBps(std::vector<VideoStream> streams, |
| int min_transmit_bitrate_bps, |
| bool pad_to_min_bitrate) { |
| int pad_up_to_bitrate_bps = 0; |
| // Calculate max padding bitrate for a multi layer codec. |
| if (streams.size() > 1) { |
| // Pad to min bitrate of the highest layer. |
| pad_up_to_bitrate_bps = streams[streams.size() - 1].min_bitrate_bps; |
| // Add target_bitrate_bps of the lower layers. |
| for (size_t i = 0; i < streams.size() - 1; ++i) |
| pad_up_to_bitrate_bps += streams[i].target_bitrate_bps; |
| } else if (pad_to_min_bitrate) { |
| pad_up_to_bitrate_bps = streams[0].min_bitrate_bps; |
| } |
| |
| pad_up_to_bitrate_bps = |
| std::max(pad_up_to_bitrate_bps, min_transmit_bitrate_bps); |
| |
| return pad_up_to_bitrate_bps; |
| } |
| |
| uint32_t CalculateOverheadRateBps(int packets_per_second, |
| size_t overhead_bytes_per_packet, |
| uint32_t max_overhead_bps) { |
| uint32_t overhead_bps = |
| static_cast<uint32_t>(8 * overhead_bytes_per_packet * packets_per_second); |
| return std::min(overhead_bps, max_overhead_bps); |
| } |
| |
| int CalculatePacketRate(uint32_t bitrate_bps, size_t packet_size_bytes) { |
| size_t packet_size_bits = 8 * packet_size_bytes; |
| // Ceil for int value of bitrate_bps / packet_size_bits. |
| return static_cast<int>((bitrate_bps + packet_size_bits - 1) / |
| packet_size_bits); |
| } |
| |
| RtpSenderObservers CreateObservers(CallStats* call_stats, |
| EncoderRtcpFeedback* encoder_feedback, |
| SendStatisticsProxy* stats_proxy, |
| SendDelayStats* send_delay_stats, |
| OverheadObserver* overhead_observer) { |
| RtpSenderObservers observers; |
| observers.rtcp_rtt_stats = call_stats; |
| observers.intra_frame_callback = encoder_feedback; |
| observers.rtcp_stats = stats_proxy; |
| observers.rtp_stats = stats_proxy; |
| observers.bitrate_observer = stats_proxy; |
| observers.frame_count_observer = stats_proxy; |
| observers.rtcp_type_observer = stats_proxy; |
| observers.send_delay_observer = stats_proxy; |
| observers.send_packet_observer = send_delay_stats; |
| observers.overhead_observer = overhead_observer; |
| return observers; |
| } |
| } // namespace |
| |
| // CheckEncoderActivityTask is used for tracking when the encoder last produced |
| // and encoded video frame. If the encoder has not produced anything the last |
| // kEncoderTimeOutMs we also want to stop sending padding. |
| class VideoSendStreamImpl::CheckEncoderActivityTask : public rtc::QueuedTask { |
| public: |
| static const int kEncoderTimeOutMs = 2000; |
| explicit CheckEncoderActivityTask( |
| const rtc::WeakPtr<VideoSendStreamImpl>& send_stream) |
| : activity_(0), send_stream_(std::move(send_stream)), timed_out_(false) {} |
| |
| void Stop() { |
| RTC_CHECK(task_checker_.CalledSequentially()); |
| send_stream_.reset(); |
| } |
| |
| void UpdateEncoderActivity() { |
| // UpdateEncoderActivity is called from VideoSendStreamImpl::Encoded on |
| // whatever thread the real encoder implementation run on. In the case of |
| // hardware encoders, there might be several encoders |
| // running in parallel on different threads. |
| rtc::AtomicOps::ReleaseStore(&activity_, 1); |
| } |
| |
| private: |
| bool Run() override { |
| RTC_CHECK(task_checker_.CalledSequentially()); |
| if (!send_stream_) |
| return true; |
| if (!rtc::AtomicOps::AcquireLoad(&activity_)) { |
| if (!timed_out_) { |
| send_stream_->SignalEncoderTimedOut(); |
| } |
| timed_out_ = true; |
| } else if (timed_out_) { |
| send_stream_->SignalEncoderActive(); |
| timed_out_ = false; |
| } |
| rtc::AtomicOps::ReleaseStore(&activity_, 0); |
| |
| rtc::TaskQueue::Current()->PostDelayedTask( |
| std::unique_ptr<rtc::QueuedTask>(this), kEncoderTimeOutMs); |
| // Return false to prevent this task from being deleted. Ownership has been |
| // transferred to the task queue when PostDelayedTask was called. |
| return false; |
| } |
| volatile int activity_; |
| |
| rtc::SequencedTaskChecker task_checker_; |
| rtc::WeakPtr<VideoSendStreamImpl> send_stream_; |
| bool timed_out_; |
| }; |
| |
| VideoSendStreamImpl::VideoSendStreamImpl( |
| SendStatisticsProxy* stats_proxy, |
| rtc::TaskQueue* worker_queue, |
| CallStats* call_stats, |
| RtpTransportControllerSendInterface* transport, |
| BitrateAllocatorInterface* bitrate_allocator, |
| SendDelayStats* send_delay_stats, |
| VideoStreamEncoderInterface* video_stream_encoder, |
| RtcEventLog* event_log, |
| const VideoSendStream::Config* config, |
| int initial_encoder_max_bitrate, |
| double initial_encoder_bitrate_priority, |
| std::map<uint32_t, RtpState> suspended_ssrcs, |
| std::map<uint32_t, RtpPayloadState> suspended_payload_states, |
| VideoEncoderConfig::ContentType content_type, |
| std::unique_ptr<FecController> fec_controller) |
| : send_side_bwe_with_overhead_( |
| webrtc::field_trial::IsEnabled("WebRTC-SendSideBwe-WithOverhead")), |
| stats_proxy_(stats_proxy), |
| config_(config), |
| fec_controller_(std::move(fec_controller)), |
| worker_queue_(worker_queue), |
| check_encoder_activity_task_(nullptr), |
| call_stats_(call_stats), |
| transport_(transport), |
| bitrate_allocator_(bitrate_allocator), |
| max_padding_bitrate_(0), |
| encoder_min_bitrate_bps_(0), |
| encoder_target_rate_bps_(0), |
| encoder_bitrate_priority_(initial_encoder_bitrate_priority), |
| has_packet_feedback_(false), |
| video_stream_encoder_(video_stream_encoder), |
| encoder_feedback_(Clock::GetRealTimeClock(), |
| config_->rtp.ssrcs, |
| video_stream_encoder), |
| bandwidth_observer_(transport->GetBandwidthObserver()), |
| rtp_video_sender_( |
| transport_->CreateRtpVideoSender(config_->rtp.ssrcs, |
| suspended_ssrcs, |
| suspended_payload_states, |
| config_->rtp, |
| config_->rtcp, |
| config_->send_transport, |
| CreateObservers(call_stats, |
| &encoder_feedback_, |
| stats_proxy_, |
| send_delay_stats, |
| this), |
| event_log)), |
| weak_ptr_factory_(this), |
| overhead_bytes_per_packet_(0), |
| transport_overhead_bytes_per_packet_(0) { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_LOG(LS_INFO) << "VideoSendStreamInternal: " << config_->ToString(); |
| weak_ptr_ = weak_ptr_factory_.GetWeakPtr(); |
| |
| RTC_DCHECK(!config_->rtp.ssrcs.empty()); |
| RTC_DCHECK(call_stats_); |
| RTC_DCHECK(transport_); |
| RTC_DCHECK_NE(initial_encoder_max_bitrate, 0); |
| |
| if (initial_encoder_max_bitrate > 0) { |
| encoder_max_bitrate_bps_ = |
| rtc::dchecked_cast<uint32_t>(initial_encoder_max_bitrate); |
| } else { |
| // TODO(srte): Make sure max bitrate is not set to negative values. We don't |
| // have any way to handle unset values in downstream code, such as the |
| // bitrate allocator. Previously -1 was implicitly casted to UINT32_MAX, a |
| // behaviour that is not safe. Converting to 10 Mbps should be safe for |
| // reasonable use cases as it allows adding the max of multiple streams |
| // without wrappping around. |
| const int kFallbackMaxBitrateBps = 10000000; |
| RTC_DLOG(LS_ERROR) << "ERROR: Initial encoder max bitrate = " |
| << initial_encoder_max_bitrate << " which is <= 0!"; |
| RTC_DLOG(LS_INFO) << "Using default encoder max bitrate = 10 Mbps"; |
| encoder_max_bitrate_bps_ = kFallbackMaxBitrateBps; |
| } |
| |
| RTC_CHECK(AlrExperimentSettings::MaxOneFieldTrialEnabled()); |
| // If send-side BWE is enabled, check if we should apply updated probing and |
| // pacing settings. |
| if (TransportSeqNumExtensionConfigured(*config_)) { |
| has_packet_feedback_ = true; |
| |
| absl::optional<AlrExperimentSettings> alr_settings; |
| if (content_type == VideoEncoderConfig::ContentType::kScreen) { |
| alr_settings = AlrExperimentSettings::CreateFromFieldTrial( |
| AlrExperimentSettings::kScreenshareProbingBweExperimentName); |
| } else { |
| alr_settings = AlrExperimentSettings::CreateFromFieldTrial( |
| AlrExperimentSettings::kStrictPacingAndProbingExperimentName); |
| } |
| if (alr_settings) { |
| transport->EnablePeriodicAlrProbing(true); |
| transport->SetPacingFactor(alr_settings->pacing_factor); |
| configured_pacing_factor_ = alr_settings->pacing_factor; |
| transport->SetQueueTimeLimit(alr_settings->max_paced_queue_time); |
| } else { |
| transport->EnablePeriodicAlrProbing(false); |
| transport->SetPacingFactor(PacedSender::kDefaultPaceMultiplier); |
| configured_pacing_factor_ = PacedSender::kDefaultPaceMultiplier; |
| transport->SetQueueTimeLimit(PacedSender::kMaxQueueLengthMs); |
| } |
| } |
| |
| if (config_->periodic_alr_bandwidth_probing) { |
| transport->EnablePeriodicAlrProbing(true); |
| } |
| |
| // Currently, both ULPFEC and FlexFEC use the same FEC rate calculation logic, |
| // so enable that logic if either of those FEC schemes are enabled. |
| fec_controller_->SetProtectionMethod(rtp_video_sender_->FecEnabled(), |
| rtp_video_sender_->NackEnabled()); |
| |
| fec_controller_->SetProtectionCallback(this); |
| // Signal congestion controller this object is ready for OnPacket* callbacks. |
| if (fec_controller_->UseLossVectorMask()) { |
| transport_->RegisterPacketFeedbackObserver(this); |
| } |
| |
| RTC_DCHECK_GE(config_->rtp.payload_type, 0); |
| RTC_DCHECK_LE(config_->rtp.payload_type, 127); |
| |
| video_stream_encoder_->SetStartBitrate( |
| bitrate_allocator_->GetStartBitrate(this)); |
| |
| // Only request rotation at the source when we positively know that the remote |
| // side doesn't support the rotation extension. This allows us to prepare the |
| // encoder in the expectation that rotation is supported - which is the common |
| // case. |
| bool rotation_applied = |
| std::find_if(config_->rtp.extensions.begin(), |
| config_->rtp.extensions.end(), |
| [](const RtpExtension& extension) { |
| return extension.uri == RtpExtension::kVideoRotationUri; |
| }) == config_->rtp.extensions.end(); |
| |
| video_stream_encoder_->SetSink(this, rotation_applied); |
| } |
| |
| VideoSendStreamImpl::~VideoSendStreamImpl() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_DCHECK(!rtp_video_sender_->IsActive()) |
| << "VideoSendStreamImpl::Stop not called"; |
| RTC_LOG(LS_INFO) << "~VideoSendStreamInternal: " << config_->ToString(); |
| if (fec_controller_->UseLossVectorMask()) { |
| transport_->DeRegisterPacketFeedbackObserver(this); |
| } |
| transport_->DestroyRtpVideoSender(rtp_video_sender_); |
| } |
| |
| void VideoSendStreamImpl::RegisterProcessThread( |
| ProcessThread* module_process_thread) { |
| rtp_video_sender_->RegisterProcessThread(module_process_thread); |
| } |
| |
| void VideoSendStreamImpl::DeRegisterProcessThread() { |
| rtp_video_sender_->DeRegisterProcessThread(); |
| } |
| |
| bool VideoSendStreamImpl::DeliverRtcp(const uint8_t* packet, size_t length) { |
| // Runs on a network thread. |
| RTC_DCHECK(!worker_queue_->IsCurrent()); |
| rtp_video_sender_->DeliverRtcp(packet, length); |
| return true; |
| } |
| |
| void VideoSendStreamImpl::UpdateActiveSimulcastLayers( |
| const std::vector<bool> active_layers) { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_LOG(LS_INFO) << "VideoSendStream::UpdateActiveSimulcastLayers"; |
| bool previously_active = rtp_video_sender_->IsActive(); |
| rtp_video_sender_->SetActiveModules(active_layers); |
| if (!rtp_video_sender_->IsActive() && previously_active) { |
| // Payload router switched from active to inactive. |
| StopVideoSendStream(); |
| } else if (rtp_video_sender_->IsActive() && !previously_active) { |
| // Payload router switched from inactive to active. |
| StartupVideoSendStream(); |
| } |
| } |
| |
| void VideoSendStreamImpl::Start() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_LOG(LS_INFO) << "VideoSendStream::Start"; |
| if (rtp_video_sender_->IsActive()) |
| return; |
| TRACE_EVENT_INSTANT0("webrtc", "VideoSendStream::Start"); |
| rtp_video_sender_->SetActive(true); |
| StartupVideoSendStream(); |
| } |
| |
| void VideoSendStreamImpl::StartupVideoSendStream() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| bitrate_allocator_->AddObserver( |
| this, |
| MediaStreamAllocationConfig{ |
| static_cast<uint32_t>(encoder_min_bitrate_bps_), |
| encoder_max_bitrate_bps_, static_cast<uint32_t>(max_padding_bitrate_), |
| !config_->suspend_below_min_bitrate, config_->track_id, |
| encoder_bitrate_priority_, has_packet_feedback_}); |
| // Start monitoring encoder activity. |
| { |
| rtc::CritScope lock(&encoder_activity_crit_sect_); |
| RTC_DCHECK(!check_encoder_activity_task_); |
| check_encoder_activity_task_ = new CheckEncoderActivityTask(weak_ptr_); |
| worker_queue_->PostDelayedTask( |
| std::unique_ptr<rtc::QueuedTask>(check_encoder_activity_task_), |
| CheckEncoderActivityTask::kEncoderTimeOutMs); |
| } |
| |
| video_stream_encoder_->SendKeyFrame(); |
| } |
| |
| void VideoSendStreamImpl::Stop() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_LOG(LS_INFO) << "VideoSendStream::Stop"; |
| if (!rtp_video_sender_->IsActive()) |
| return; |
| TRACE_EVENT_INSTANT0("webrtc", "VideoSendStream::Stop"); |
| rtp_video_sender_->SetActive(false); |
| StopVideoSendStream(); |
| } |
| |
| void VideoSendStreamImpl::StopVideoSendStream() { |
| bitrate_allocator_->RemoveObserver(this); |
| { |
| rtc::CritScope lock(&encoder_activity_crit_sect_); |
| check_encoder_activity_task_->Stop(); |
| check_encoder_activity_task_ = nullptr; |
| } |
| video_stream_encoder_->OnBitrateUpdated(0, 0, 0); |
| stats_proxy_->OnSetEncoderTargetRate(0); |
| } |
| |
| void VideoSendStreamImpl::SignalEncoderTimedOut() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| // If the encoder has not produced anything the last kEncoderTimeOutMs and it |
| // is supposed to, deregister as BitrateAllocatorObserver. This can happen |
| // if a camera stops producing frames. |
| if (encoder_target_rate_bps_ > 0) { |
| RTC_LOG(LS_INFO) << "SignalEncoderTimedOut, Encoder timed out."; |
| bitrate_allocator_->RemoveObserver(this); |
| } |
| } |
| |
| void VideoSendStreamImpl::OnBitrateAllocationUpdated( |
| const VideoBitrateAllocation& allocation) { |
| if (encoder_target_rate_bps_ != 0) { |
| // Send bitrate allocation metadata only if encoder is not paused. |
| rtp_video_sender_->OnBitrateAllocationUpdated(allocation); |
| } |
| } |
| |
| void VideoSendStreamImpl::SignalEncoderActive() { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_LOG(LS_INFO) << "SignalEncoderActive, Encoder is active."; |
| bitrate_allocator_->AddObserver( |
| this, |
| MediaStreamAllocationConfig{ |
| static_cast<uint32_t>(encoder_min_bitrate_bps_), |
| encoder_max_bitrate_bps_, static_cast<uint32_t>(max_padding_bitrate_), |
| !config_->suspend_below_min_bitrate, config_->track_id, |
| encoder_bitrate_priority_, has_packet_feedback_}); |
| } |
| |
| void VideoSendStreamImpl::OnEncoderConfigurationChanged( |
| std::vector<VideoStream> streams, |
| int min_transmit_bitrate_bps) { |
| if (!worker_queue_->IsCurrent()) { |
| rtc::WeakPtr<VideoSendStreamImpl> send_stream = weak_ptr_; |
| worker_queue_->PostTask([send_stream, streams, min_transmit_bitrate_bps]() { |
| if (send_stream) |
| send_stream->OnEncoderConfigurationChanged(std::move(streams), |
| min_transmit_bitrate_bps); |
| }); |
| return; |
| } |
| RTC_DCHECK_GE(config_->rtp.ssrcs.size(), streams.size()); |
| TRACE_EVENT0("webrtc", "VideoSendStream::OnEncoderConfigurationChanged"); |
| RTC_DCHECK_GE(config_->rtp.ssrcs.size(), streams.size()); |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| |
| encoder_min_bitrate_bps_ = |
| std::max(streams[0].min_bitrate_bps, GetEncoderMinBitrateBps()); |
| encoder_max_bitrate_bps_ = 0; |
| double stream_bitrate_priority_sum = 0; |
| for (const auto& stream : streams) { |
| // We don't want to allocate more bitrate than needed to inactive streams. |
| encoder_max_bitrate_bps_ += stream.active ? stream.max_bitrate_bps : 0; |
| if (stream.bitrate_priority) { |
| RTC_DCHECK_GT(*stream.bitrate_priority, 0); |
| stream_bitrate_priority_sum += *stream.bitrate_priority; |
| } |
| } |
| RTC_DCHECK_GT(stream_bitrate_priority_sum, 0); |
| encoder_bitrate_priority_ = stream_bitrate_priority_sum; |
| encoder_max_bitrate_bps_ = |
| std::max(static_cast<uint32_t>(encoder_min_bitrate_bps_), |
| encoder_max_bitrate_bps_); |
| |
| const VideoCodecType codec_type = |
| PayloadStringToCodecType(config_->rtp.payload_name); |
| if (codec_type == kVideoCodecVP9) { |
| max_padding_bitrate_ = streams[0].target_bitrate_bps; |
| } else { |
| max_padding_bitrate_ = CalculateMaxPadBitrateBps( |
| streams, min_transmit_bitrate_bps, config_->suspend_below_min_bitrate); |
| } |
| |
| // Clear stats for disabled layers. |
| for (size_t i = streams.size(); i < config_->rtp.ssrcs.size(); ++i) { |
| stats_proxy_->OnInactiveSsrc(config_->rtp.ssrcs[i]); |
| } |
| |
| const size_t num_temporal_layers = |
| streams.back().num_temporal_layers.value_or(1); |
| fec_controller_->SetEncodingData(streams[0].width, streams[0].height, |
| num_temporal_layers, |
| config_->rtp.max_packet_size); |
| |
| if (rtp_video_sender_->IsActive()) { |
| // The send stream is started already. Update the allocator with new bitrate |
| // limits. |
| bitrate_allocator_->AddObserver( |
| this, MediaStreamAllocationConfig{ |
| static_cast<uint32_t>(encoder_min_bitrate_bps_), |
| encoder_max_bitrate_bps_, |
| static_cast<uint32_t>(max_padding_bitrate_), |
| !config_->suspend_below_min_bitrate, config_->track_id, |
| encoder_bitrate_priority_, has_packet_feedback_}); |
| } |
| } |
| |
| EncodedImageCallback::Result VideoSendStreamImpl::OnEncodedImage( |
| const EncodedImage& encoded_image, |
| const CodecSpecificInfo* codec_specific_info, |
| const RTPFragmentationHeader* fragmentation) { |
| // Encoded is called on whatever thread the real encoder implementation run |
| // on. In the case of hardware encoders, there might be several encoders |
| // running in parallel on different threads. |
| const size_t simulcast_idx = |
| (codec_specific_info->codecType != kVideoCodecVP9) |
| ? encoded_image.SpatialIndex().value_or(0) |
| : 0; |
| if (config_->post_encode_callback) { |
| // TODO(nisse): Delete webrtc::EncodedFrame class, pass EncodedImage |
| // instead. |
| config_->post_encode_callback->EncodedFrameCallback(EncodedFrame( |
| encoded_image._buffer, encoded_image._length, encoded_image._frameType, |
| simulcast_idx, encoded_image.Timestamp())); |
| } |
| { |
| rtc::CritScope lock(&encoder_activity_crit_sect_); |
| if (check_encoder_activity_task_) |
| check_encoder_activity_task_->UpdateEncoderActivity(); |
| } |
| |
| fec_controller_->UpdateWithEncodedData(encoded_image._length, |
| encoded_image._frameType); |
| return rtp_video_sender_->OnEncodedImage(encoded_image, codec_specific_info, |
| fragmentation); |
| } |
| |
| std::map<uint32_t, RtpState> VideoSendStreamImpl::GetRtpStates() const { |
| return rtp_video_sender_->GetRtpStates(); |
| } |
| |
| std::map<uint32_t, RtpPayloadState> VideoSendStreamImpl::GetRtpPayloadStates() |
| const { |
| return rtp_video_sender_->GetRtpPayloadStates(); |
| } |
| |
| uint32_t VideoSendStreamImpl::OnBitrateUpdated(uint32_t bitrate_bps, |
| uint8_t fraction_loss, |
| int64_t rtt, |
| int64_t probing_interval_ms) { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| RTC_DCHECK(rtp_video_sender_->IsActive()) |
| << "VideoSendStream::Start has not been called."; |
| |
| // Substract overhead from bitrate. |
| rtc::CritScope lock(&overhead_bytes_per_packet_crit_); |
| uint32_t payload_bitrate_bps = bitrate_bps; |
| if (send_side_bwe_with_overhead_) { |
| payload_bitrate_bps -= CalculateOverheadRateBps( |
| CalculatePacketRate(bitrate_bps, |
| config_->rtp.max_packet_size + |
| transport_overhead_bytes_per_packet_), |
| overhead_bytes_per_packet_ + transport_overhead_bytes_per_packet_, |
| bitrate_bps); |
| } |
| |
| // Get the encoder target rate. It is the estimated network rate - |
| // protection overhead. |
| encoder_target_rate_bps_ = fec_controller_->UpdateFecRates( |
| payload_bitrate_bps, stats_proxy_->GetSendFrameRate(), fraction_loss, |
| loss_mask_vector_, rtt); |
| loss_mask_vector_.clear(); |
| |
| uint32_t encoder_overhead_rate_bps = |
| send_side_bwe_with_overhead_ |
| ? CalculateOverheadRateBps( |
| CalculatePacketRate(encoder_target_rate_bps_, |
| config_->rtp.max_packet_size + |
| transport_overhead_bytes_per_packet_ - |
| overhead_bytes_per_packet_), |
| overhead_bytes_per_packet_ + |
| transport_overhead_bytes_per_packet_, |
| bitrate_bps - encoder_target_rate_bps_) |
| : 0; |
| |
| // When the field trial "WebRTC-SendSideBwe-WithOverhead" is enabled |
| // protection_bitrate includes overhead. |
| uint32_t protection_bitrate = |
| bitrate_bps - (encoder_target_rate_bps_ + encoder_overhead_rate_bps); |
| |
| encoder_target_rate_bps_ = |
| std::min(encoder_max_bitrate_bps_, encoder_target_rate_bps_); |
| video_stream_encoder_->OnBitrateUpdated(encoder_target_rate_bps_, |
| fraction_loss, rtt); |
| stats_proxy_->OnSetEncoderTargetRate(encoder_target_rate_bps_); |
| return protection_bitrate; |
| } |
| |
| int VideoSendStreamImpl::ProtectionRequest( |
| const FecProtectionParams* delta_params, |
| const FecProtectionParams* key_params, |
| uint32_t* sent_video_rate_bps, |
| uint32_t* sent_nack_rate_bps, |
| uint32_t* sent_fec_rate_bps) { |
| RTC_DCHECK_RUN_ON(worker_queue_); |
| rtp_video_sender_->ProtectionRequest(delta_params, key_params, |
| sent_video_rate_bps, sent_nack_rate_bps, |
| sent_fec_rate_bps); |
| return 0; |
| } |
| |
| void VideoSendStreamImpl::OnOverheadChanged(size_t overhead_bytes_per_packet) { |
| rtc::CritScope lock(&overhead_bytes_per_packet_crit_); |
| overhead_bytes_per_packet_ = overhead_bytes_per_packet; |
| } |
| |
| void VideoSendStreamImpl::SetTransportOverhead( |
| size_t transport_overhead_bytes_per_packet) { |
| if (transport_overhead_bytes_per_packet >= static_cast<int>(kPathMTU)) { |
| RTC_LOG(LS_ERROR) << "Transport overhead exceeds size of ethernet frame"; |
| return; |
| } |
| |
| transport_overhead_bytes_per_packet_ = transport_overhead_bytes_per_packet; |
| |
| size_t rtp_packet_size = |
| std::min(config_->rtp.max_packet_size, |
| kPathMTU - transport_overhead_bytes_per_packet_); |
| |
| rtp_video_sender_->SetMaxRtpPacketSize(rtp_packet_size); |
| } |
| |
| void VideoSendStreamImpl::OnPacketAdded(uint32_t ssrc, uint16_t seq_num) { |
| if (!worker_queue_->IsCurrent()) { |
| auto ptr = weak_ptr_; |
| worker_queue_->PostTask([=] { |
| if (!ptr.get()) |
| return; |
| ptr->OnPacketAdded(ssrc, seq_num); |
| }); |
| return; |
| } |
| const auto ssrcs = config_->rtp.ssrcs; |
| if (std::find(ssrcs.begin(), ssrcs.end(), ssrc) != ssrcs.end()) { |
| feedback_packet_seq_num_set_.insert(seq_num); |
| if (feedback_packet_seq_num_set_.size() > kSendSideSeqNumSetMaxSize) { |
| RTC_LOG(LS_WARNING) << "Feedback packet sequence number set exceed it's " |
| "max size', will get reset."; |
| feedback_packet_seq_num_set_.clear(); |
| } |
| } |
| } |
| |
| void VideoSendStreamImpl::OnPacketFeedbackVector( |
| const std::vector<PacketFeedback>& packet_feedback_vector) { |
| if (!worker_queue_->IsCurrent()) { |
| auto ptr = weak_ptr_; |
| worker_queue_->PostTask([=] { |
| if (!ptr.get()) |
| return; |
| ptr->OnPacketFeedbackVector(packet_feedback_vector); |
| }); |
| return; |
| } |
| // Lost feedbacks are not considered to be lost packets. |
| for (const PacketFeedback& packet : packet_feedback_vector) { |
| auto it = feedback_packet_seq_num_set_.find(packet.sequence_number); |
| if (it != feedback_packet_seq_num_set_.end()) { |
| const bool lost = packet.arrival_time_ms == PacketFeedback::kNotReceived; |
| loss_mask_vector_.push_back(lost); |
| feedback_packet_seq_num_set_.erase(it); |
| } |
| } |
| } |
| } // namespace internal |
| } // namespace webrtc |
