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* Copyright 2019 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 <stdint.h>
#include <string>
#include <vector>
#include "absl/types/optional.h"
#include "api/crypto/frame_decryptor_interface.h"
#include "api/media_stream_interface.h"
#include "api/media_types.h"
#include "api/rtp_parameters.h"
#include "api/rtp_receiver_interface.h"
#include "api/scoped_refptr.h"
#include "api/video/video_frame.h"
#include "api/video/video_sink_interface.h"
#include "api/video/video_source_interface.h"
#include "media/base/media_channel.h"
#include "media/base/video_broadcaster.h"
#include "pc/jitter_buffer_delay_interface.h"
#include "pc/rtp_receiver.h"
#include "pc/video_track_source.h"
#include "rtc_base/ref_counted_object.h"
#include "rtc_base/thread.h"
namespace webrtc {
class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInternal> {
// An SSRC of 0 will create a receiver that will match the first SSRC it
// sees. Must be called on signaling thread.
VideoRtpReceiver(rtc::Thread* worker_thread,
std::string receiver_id,
std::vector<std::string> streams_ids);
// TODO(hbos): Remove this when streams() is removed.
rtc::Thread* worker_thread,
const std::string& receiver_id,
const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& streams);
virtual ~VideoRtpReceiver();
rtc::scoped_refptr<VideoTrackInterface> video_track() const {
return track_.get();
// RtpReceiverInterface implementation
rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
return track_.get();
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override {
return dtls_transport_;
std::vector<std::string> stream_ids() const override;
std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams()
const override {
return streams_;
cricket::MediaType media_type() const override {
return cricket::MEDIA_TYPE_VIDEO;
std::string id() const override { return id_; }
RtpParameters GetParameters() const override;
bool SetParameters(const RtpParameters& parameters) override;
void SetFrameDecryptor(
rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor) override;
rtc::scoped_refptr<FrameDecryptorInterface> GetFrameDecryptor()
const override;
// RtpReceiverInternal implementation.
void Stop() override;
void SetupMediaChannel(uint32_t ssrc) override;
uint32_t ssrc() const override { return ssrc_.value_or(0); }
void NotifyFirstPacketReceived() override;
void set_stream_ids(std::vector<std::string> stream_ids) override;
void set_transport(
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) override {
dtls_transport_ = dtls_transport;
void SetStreams(const std::vector<rtc::scoped_refptr<MediaStreamInterface>>&
streams) override;
void SetObserver(RtpReceiverObserverInterface* observer) override;
void SetJitterBufferMinimumDelay(
absl::optional<double> delay_seconds) override;
void SetMediaChannel(cricket::MediaChannel* media_channel) override;
int AttachmentId() const override { return attachment_id_; }
std::vector<RtpSource> GetSources() const override;
class VideoRtpTrackSource : public VideoTrackSource {
VideoRtpTrackSource() : VideoTrackSource(true /* remote */) {}
rtc::VideoSourceInterface<VideoFrame>* source() override {
return &broadcaster_;
rtc::VideoSinkInterface<VideoFrame>* sink() { return &broadcaster_; }
// |broadcaster_| is needed since the decoder can only handle one sink.
// It might be better if the decoder can handle multiple sinks and consider
// the VideoSinkWants.
rtc::VideoBroadcaster broadcaster_;
bool SetSink(rtc::VideoSinkInterface<VideoFrame>* sink);
rtc::Thread* const worker_thread_;
const std::string id_;
cricket::VideoMediaChannel* media_channel_ = nullptr;
absl::optional<uint32_t> ssrc_;
// |source_| is held here to be able to change the state of the source when
// the VideoRtpReceiver is stopped.
rtc::scoped_refptr<VideoRtpTrackSource> source_;
rtc::scoped_refptr<VideoTrackInterface> track_;
std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_;
bool stopped_ = false;
RtpReceiverObserverInterface* observer_ = nullptr;
bool received_first_packet_ = false;
int attachment_id_ = 0;
rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_;
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport_;
// Allows to thread safely change jitter buffer delay. Handles caching cases
// if |SetJitterBufferMinimumDelay| is called before start.
rtc::scoped_refptr<JitterBufferDelayInterface> delay_;
} // namespace webrtc