| /* |
| * 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. |
| */ |
| #ifndef VIDEO_VIDEO_SEND_STREAM_IMPL_H_ |
| #define VIDEO_VIDEO_SEND_STREAM_IMPL_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <atomic> |
| #include <map> |
| #include <memory> |
| #include <vector> |
| |
| #include "absl/types/optional.h" |
| #include "api/field_trials_view.h" |
| #include "api/task_queue/pending_task_safety_flag.h" |
| #include "api/task_queue/task_queue_base.h" |
| #include "api/video/encoded_image.h" |
| #include "api/video/video_bitrate_allocation.h" |
| #include "api/video/video_bitrate_allocator.h" |
| #include "api/video_codecs/video_encoder.h" |
| #include "call/bitrate_allocator.h" |
| #include "call/rtp_config.h" |
| #include "call/rtp_transport_controller_send_interface.h" |
| #include "call/rtp_video_sender_interface.h" |
| #include "modules/include/module_common_types.h" |
| #include "modules/rtp_rtcp/include/rtp_rtcp_defines.h" |
| #include "modules/utility/maybe_worker_thread.h" |
| #include "modules/video_coding/include/video_codec_interface.h" |
| #include "rtc_base/experiments/field_trial_parser.h" |
| #include "rtc_base/system/no_unique_address.h" |
| #include "rtc_base/task_utils/repeating_task.h" |
| #include "rtc_base/thread_annotations.h" |
| #include "video/config/video_encoder_config.h" |
| #include "video/send_statistics_proxy.h" |
| #include "video/video_stream_encoder_interface.h" |
| |
| namespace webrtc { |
| namespace internal { |
| |
| // Pacing buffer config; overridden by ALR config if provided. |
| struct PacingConfig { |
| explicit PacingConfig(const FieldTrialsView& field_trials); |
| PacingConfig(const PacingConfig&); |
| PacingConfig& operator=(const PacingConfig&) = default; |
| ~PacingConfig(); |
| FieldTrialParameter<double> pacing_factor; |
| FieldTrialParameter<TimeDelta> max_pacing_delay; |
| }; |
| |
| // VideoSendStreamImpl implements internal::VideoSendStream. |
| // It is created and destroyed on `rtp_transport_queue`. The intent is to |
| // decrease the need for locking and to ensure methods are called in sequence. |
| // Public methods except `DeliverRtcp` must be called on `rtp_transport_queue`. |
| // DeliverRtcp is called on the libjingle worker thread or a network thread. |
| // An encoder may deliver frames through the EncodedImageCallback on an |
| // arbitrary thread. |
| class VideoSendStreamImpl : public webrtc::BitrateAllocatorObserver, |
| public VideoStreamEncoderInterface::EncoderSink { |
| public: |
| VideoSendStreamImpl(Clock* clock, |
| SendStatisticsProxy* stats_proxy, |
| RtpTransportControllerSendInterface* transport, |
| BitrateAllocatorInterface* bitrate_allocator, |
| VideoStreamEncoderInterface* video_stream_encoder, |
| const VideoSendStream::Config* config, |
| int initial_encoder_max_bitrate, |
| double initial_encoder_bitrate_priority, |
| VideoEncoderConfig::ContentType content_type, |
| RtpVideoSenderInterface* rtp_video_sender, |
| const FieldTrialsView& field_trials); |
| ~VideoSendStreamImpl() override; |
| |
| void DeliverRtcp(const uint8_t* packet, size_t length); |
| void UpdateActiveSimulcastLayers(std::vector<bool> active_layers); |
| void Start(); |
| void Stop(); |
| |
| // TODO(holmer): Move these to RtpTransportControllerSend. |
| std::map<uint32_t, RtpState> GetRtpStates() const; |
| |
| std::map<uint32_t, RtpPayloadState> GetRtpPayloadStates() const; |
| |
| const absl::optional<float>& configured_pacing_factor() const { |
| return configured_pacing_factor_; |
| } |
| |
| private: |
| // Implements BitrateAllocatorObserver. |
| uint32_t OnBitrateUpdated(BitrateAllocationUpdate update) override; |
| |
| // Implements VideoStreamEncoderInterface::EncoderSink |
| void OnEncoderConfigurationChanged( |
| std::vector<VideoStream> streams, |
| bool is_svc, |
| VideoEncoderConfig::ContentType content_type, |
| int min_transmit_bitrate_bps) override; |
| |
| void OnBitrateAllocationUpdated( |
| const VideoBitrateAllocation& allocation) override; |
| void OnVideoLayersAllocationUpdated( |
| VideoLayersAllocation allocation) override; |
| |
| // Implements EncodedImageCallback. The implementation routes encoded frames |
| // to the `payload_router_` and `config.pre_encode_callback` if set. |
| // Called on an arbitrary encoder callback thread. |
| EncodedImageCallback::Result OnEncodedImage( |
| const EncodedImage& encoded_image, |
| const CodecSpecificInfo* codec_specific_info) override; |
| |
| // Implements EncodedImageCallback. |
| void OnDroppedFrame(EncodedImageCallback::DropReason reason) override; |
| |
| // Starts monitoring and sends a keyframe. |
| void StartupVideoSendStream(); |
| // Removes the bitrate observer, stops monitoring and notifies the video |
| // encoder of the bitrate update. |
| void StopVideoSendStream() RTC_RUN_ON(rtp_transport_queue_); |
| |
| void ConfigureProtection(); |
| void ConfigureSsrcs(); |
| void SignalEncoderTimedOut(); |
| void SignalEncoderActive(); |
| MediaStreamAllocationConfig GetAllocationConfig() const |
| RTC_RUN_ON(rtp_transport_queue_); |
| |
| RTC_NO_UNIQUE_ADDRESS SequenceChecker thread_checker_; |
| Clock* const clock_; |
| const bool has_alr_probing_; |
| const PacingConfig pacing_config_; |
| |
| SendStatisticsProxy* const stats_proxy_; |
| const VideoSendStream::Config* const config_; |
| |
| MaybeWorkerThread* const rtp_transport_queue_; |
| |
| RepeatingTaskHandle check_encoder_activity_task_ |
| RTC_GUARDED_BY(rtp_transport_queue_); |
| |
| std::atomic_bool activity_; |
| bool timed_out_ RTC_GUARDED_BY(rtp_transport_queue_); |
| |
| RtpTransportControllerSendInterface* const transport_; |
| BitrateAllocatorInterface* const bitrate_allocator_; |
| |
| bool disable_padding_; |
| int max_padding_bitrate_; |
| int encoder_min_bitrate_bps_; |
| uint32_t encoder_max_bitrate_bps_; |
| uint32_t encoder_target_rate_bps_; |
| double encoder_bitrate_priority_; |
| |
| VideoStreamEncoderInterface* const video_stream_encoder_; |
| |
| RtcpBandwidthObserver* const bandwidth_observer_; |
| RtpVideoSenderInterface* const rtp_video_sender_; |
| |
| rtc::scoped_refptr<PendingTaskSafetyFlag> transport_queue_safety_ = |
| PendingTaskSafetyFlag::CreateDetached(); |
| |
| // Context for the most recent and last sent video bitrate allocation. Used to |
| // throttle sending of similar bitrate allocations. |
| struct VbaSendContext { |
| VideoBitrateAllocation last_sent_allocation; |
| absl::optional<VideoBitrateAllocation> throttled_allocation; |
| int64_t last_send_time_ms; |
| }; |
| absl::optional<VbaSendContext> video_bitrate_allocation_context_ |
| RTC_GUARDED_BY(rtp_transport_queue_); |
| const absl::optional<float> configured_pacing_factor_; |
| }; |
| } // namespace internal |
| } // namespace webrtc |
| #endif // VIDEO_VIDEO_SEND_STREAM_IMPL_H_ |