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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.
+ */
+
+#ifndef PC_VIDEO_RTP_RECEIVER_H_
+#define PC_VIDEO_RTP_RECEIVER_H_
+
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/crypto/frame_decryptor_interface.h"
+#include "api/dtls_transport_interface.h"
+#include "api/frame_transformer_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/sequence_checker.h"
+#include "api/transport/rtp/rtp_source.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 "pc/jitter_buffer_delay.h"
+#include "pc/media_stream_track_proxy.h"
+#include "pc/rtp_receiver.h"
+#include "pc/video_rtp_track_source.h"
+#include "pc/video_track.h"
+#include "rtc_base/system/no_unique_address.h"
+#include "rtc_base/thread.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace webrtc {
+
+class VideoRtpReceiver : public RtpReceiverInternal {
+ public:
+ // 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.
+ // https://crbug.com/webrtc/9480
+ VideoRtpReceiver(
+ 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_; }
+
+ // RtpReceiverInterface implementation
+ rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
+ return track_;
+ }
+ rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override;
+ std::vector<std::string> stream_ids() const override;
+ std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams()
+ const override;
+ cricket::MediaType media_type() const override {
+ return cricket::MEDIA_TYPE_VIDEO;
+ }
+
+ std::string id() const override { return id_; }
+
+ RtpParameters GetParameters() const override;
+
+ void SetFrameDecryptor(
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor) override;
+
+ rtc::scoped_refptr<FrameDecryptorInterface> GetFrameDecryptor()
+ const override;
+
+ void SetDepacketizerToDecoderFrameTransformer(
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer) override;
+
+ // RtpReceiverInternal implementation.
+ void Stop() override;
+ void SetupMediaChannel(uint32_t ssrc) override;
+ void SetupUnsignaledMediaChannel() override;
+ absl::optional<uint32_t> ssrc() const override;
+ void NotifyFirstPacketReceived() override;
+ void set_stream_ids(std::vector<std::string> stream_ids) override;
+ void set_transport(
+ rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) override;
+ 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::MediaReceiveChannelInterface* media_channel) override;
+
+ int AttachmentId() const override { return attachment_id_; }
+
+ std::vector<RtpSource> GetSources() const override;
+
+ // Combines SetMediaChannel, SetupMediaChannel and
+ // SetupUnsignaledMediaChannel.
+ void SetupMediaChannel(absl::optional<uint32_t> ssrc,
+ cricket::MediaReceiveChannelInterface* media_channel);
+
+ private:
+ void RestartMediaChannel(absl::optional<uint32_t> ssrc)
+ RTC_RUN_ON(&signaling_thread_checker_);
+ void RestartMediaChannel_w(absl::optional<uint32_t> ssrc,
+ MediaSourceInterface::SourceState state)
+ RTC_RUN_ON(worker_thread_);
+ void SetSink(rtc::VideoSinkInterface<VideoFrame>* sink)
+ RTC_RUN_ON(worker_thread_);
+ void SetMediaChannel_w(cricket::MediaReceiveChannelInterface* media_channel)
+ RTC_RUN_ON(worker_thread_);
+
+ // VideoRtpTrackSource::Callback
+ void OnGenerateKeyFrame();
+ void OnEncodedSinkEnabled(bool enable);
+
+ void SetEncodedSinkEnabled(bool enable) RTC_RUN_ON(worker_thread_);
+
+ class SourceCallback : public VideoRtpTrackSource::Callback {
+ public:
+ explicit SourceCallback(VideoRtpReceiver* receiver) : receiver_(receiver) {}
+ ~SourceCallback() override = default;
+
+ private:
+ void OnGenerateKeyFrame() override { receiver_->OnGenerateKeyFrame(); }
+ void OnEncodedSinkEnabled(bool enable) override {
+ receiver_->OnEncodedSinkEnabled(enable);
+ }
+
+ VideoRtpReceiver* const receiver_;
+ } source_callback_{this};
+
+ RTC_NO_UNIQUE_ADDRESS SequenceChecker signaling_thread_checker_;
+ rtc::Thread* const worker_thread_;
+
+ const std::string id_;
+ cricket::VideoMediaReceiveChannelInterface* media_channel_
+ RTC_GUARDED_BY(worker_thread_) = nullptr;
+ absl::optional<uint32_t> signaled_ssrc_ RTC_GUARDED_BY(worker_thread_);
+ // `source_` is held here to be able to change the state of the source when
+ // the VideoRtpReceiver is stopped.
+ const rtc::scoped_refptr<VideoRtpTrackSource> source_;
+ const rtc::scoped_refptr<VideoTrackProxyWithInternal<VideoTrack>> track_;
+ std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_
+ RTC_GUARDED_BY(&signaling_thread_checker_);
+ RtpReceiverObserverInterface* observer_
+ RTC_GUARDED_BY(&signaling_thread_checker_) = nullptr;
+ bool received_first_packet_ RTC_GUARDED_BY(&signaling_thread_checker_) =
+ false;
+ const int attachment_id_;
+ rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_
+ RTC_GUARDED_BY(worker_thread_);
+ rtc::scoped_refptr<DtlsTransportInterface> dtls_transport_
+ RTC_GUARDED_BY(&signaling_thread_checker_);
+ rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
+ RTC_GUARDED_BY(worker_thread_);
+ // Stores the minimum jitter buffer delay. Handles caching cases
+ // if `SetJitterBufferMinimumDelay` is called before start.
+ JitterBufferDelay delay_ RTC_GUARDED_BY(worker_thread_);
+
+ // Records if we should generate a keyframe when `media_channel_` gets set up
+ // or switched.
+ bool saved_generate_keyframe_ RTC_GUARDED_BY(worker_thread_) = false;
+ bool saved_encoded_sink_enabled_ RTC_GUARDED_BY(worker_thread_) = false;
+};
+
+} // namespace webrtc
+
+#endif // PC_VIDEO_RTP_RECEIVER_H_