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/*
* 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/video/encoded_image.h"
#include "api/video/video_bitrate_allocation.h"
#include "api/video/video_bitrate_allocator.h"
#include "api/video/video_stream_encoder_interface.h"
#include "api/video_codecs/video_encoder.h"
#include "api/video_codecs/video_encoder_config.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/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_queue.h"
#include "rtc_base/task_utils/pending_task_safety_flag.h"
#include "rtc_base/task_utils/repeating_task.h"
#include "rtc_base/thread_annotations.h"
#include "video/send_statistics_proxy.h"
namespace webrtc {
namespace internal {
// Pacing buffer config; overridden by ALR config if provided.
struct PacingConfig {
PacingConfig();
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,
rtc::TaskQueue* rtp_transport_queue,
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);
~VideoSendStreamImpl() override;
void DeliverRtcp(const uint8_t* packet, size_t length);
void UpdateActiveSimulcastLayers(const 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_;
rtc::TaskQueue* 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_
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