188 lines
7.2 KiB
C++
188 lines
7.2 KiB
C++
/*
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* Copyright 2019 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef PC_VIDEO_RTP_RECEIVER_H_
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#define PC_VIDEO_RTP_RECEIVER_H_
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/crypto/frame_decryptor_interface.h"
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#include "api/dtls_transport_interface.h"
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#include "api/frame_transformer_interface.h"
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#include "api/media_stream_interface.h"
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#include "api/media_types.h"
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#include "api/rtp_parameters.h"
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#include "api/rtp_receiver_interface.h"
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#include "api/scoped_refptr.h"
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#include "api/sequence_checker.h"
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#include "api/transport/rtp/rtp_source.h"
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#include "api/video/video_frame.h"
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#include "api/video/video_sink_interface.h"
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#include "api/video/video_source_interface.h"
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#include "media/base/media_channel.h"
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#include "pc/jitter_buffer_delay.h"
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#include "pc/media_stream_track_proxy.h"
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#include "pc/rtp_receiver.h"
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#include "pc/video_rtp_track_source.h"
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#include "pc/video_track.h"
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#include "rtc_base/ref_counted_object.h"
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#include "rtc_base/system/no_unique_address.h"
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#include "rtc_base/thread.h"
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#include "rtc_base/thread_annotations.h"
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namespace webrtc {
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class VideoRtpReceiver : public RtpReceiverInternal {
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public:
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// An SSRC of 0 will create a receiver that will match the first SSRC it
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// sees. Must be called on signaling thread.
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VideoRtpReceiver(rtc::Thread* worker_thread,
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std::string receiver_id,
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std::vector<std::string> streams_ids);
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// TODO(hbos): Remove this when streams() is removed.
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// https://crbug.com/webrtc/9480
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VideoRtpReceiver(
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rtc::Thread* worker_thread,
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const std::string& receiver_id,
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const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& streams);
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virtual ~VideoRtpReceiver();
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rtc::scoped_refptr<VideoTrackInterface> video_track() const { return track_; }
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// RtpReceiverInterface implementation
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rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
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return track_;
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}
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rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override;
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std::vector<std::string> stream_ids() const override;
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std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams()
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const override;
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cricket::MediaType media_type() const override {
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return cricket::MEDIA_TYPE_VIDEO;
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}
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std::string id() const override { return id_; }
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RtpParameters GetParameters() const override;
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void SetFrameDecryptor(
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rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor) override;
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rtc::scoped_refptr<FrameDecryptorInterface> GetFrameDecryptor()
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const override;
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void SetDepacketizerToDecoderFrameTransformer(
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rtc::scoped_refptr<FrameTransformerInterface> frame_transformer) override;
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// RtpReceiverInternal implementation.
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void Stop() override;
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void StopAndEndTrack() override;
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void SetupMediaChannel(uint32_t ssrc) override;
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void SetupUnsignaledMediaChannel() override;
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uint32_t ssrc() const override;
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void NotifyFirstPacketReceived() override;
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void set_stream_ids(std::vector<std::string> stream_ids) override;
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void set_transport(
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rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) override;
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void SetStreams(const std::vector<rtc::scoped_refptr<MediaStreamInterface>>&
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streams) override;
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void SetObserver(RtpReceiverObserverInterface* observer) override;
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void SetJitterBufferMinimumDelay(
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absl::optional<double> delay_seconds) override;
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void SetMediaChannel(cricket::MediaChannel* media_channel) override;
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int AttachmentId() const override { return attachment_id_; }
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std::vector<RtpSource> GetSources() const override;
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private:
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void RestartMediaChannel(absl::optional<uint32_t> ssrc);
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void SetSink(rtc::VideoSinkInterface<VideoFrame>* sink)
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RTC_RUN_ON(worker_thread_);
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void SetMediaChannel_w(cricket::MediaChannel* media_channel)
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RTC_RUN_ON(worker_thread_);
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// VideoRtpTrackSource::Callback
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void OnGenerateKeyFrame();
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void OnEncodedSinkEnabled(bool enable);
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void SetEncodedSinkEnabled(bool enable) RTC_RUN_ON(worker_thread_);
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class SourceCallback : public VideoRtpTrackSource::Callback {
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public:
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explicit SourceCallback(VideoRtpReceiver* receiver) : receiver_(receiver) {}
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~SourceCallback() override = default;
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private:
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void OnGenerateKeyFrame() override { receiver_->OnGenerateKeyFrame(); }
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void OnEncodedSinkEnabled(bool enable) override {
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receiver_->OnEncodedSinkEnabled(enable);
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}
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VideoRtpReceiver* const receiver_;
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} source_callback_{this};
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RTC_NO_UNIQUE_ADDRESS SequenceChecker signaling_thread_checker_;
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rtc::Thread* const worker_thread_;
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const std::string id_;
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// See documentation for `stopped_` below for when a valid media channel
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// has been assigned and when this pointer will be null.
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cricket::VideoMediaChannel* media_channel_ RTC_GUARDED_BY(worker_thread_) =
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nullptr;
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absl::optional<uint32_t> ssrc_ RTC_GUARDED_BY(worker_thread_);
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// `source_` is held here to be able to change the state of the source when
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// the VideoRtpReceiver is stopped.
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const rtc::scoped_refptr<VideoRtpTrackSource> source_;
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const rtc::scoped_refptr<VideoTrackProxyWithInternal<VideoTrack>> track_;
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std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_
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RTC_GUARDED_BY(&signaling_thread_checker_);
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// `stopped` is state that's used on the signaling thread to indicate whether
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// a valid `media_channel_` has been assigned and configured. When an instance
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// of VideoRtpReceiver is initially created, `stopped_` is true and will
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// remain true until either `SetupMediaChannel` or
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// `SetupUnsignaledMediaChannel` is called after assigning a media channel.
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// After that, `stopped_` will remain false until `Stop()` is called.
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// Note, for checking the state of the class on the worker thread,
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// check `media_channel_` instead, as that's the main worker thread state.
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bool stopped_ RTC_GUARDED_BY(&signaling_thread_checker_) = true;
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RtpReceiverObserverInterface* observer_
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RTC_GUARDED_BY(&signaling_thread_checker_) = nullptr;
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bool received_first_packet_ RTC_GUARDED_BY(&signaling_thread_checker_) =
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false;
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const int attachment_id_;
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rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_
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RTC_GUARDED_BY(worker_thread_);
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rtc::scoped_refptr<DtlsTransportInterface> dtls_transport_
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RTC_GUARDED_BY(&signaling_thread_checker_);
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rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
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RTC_GUARDED_BY(worker_thread_);
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// Stores the minimum jitter buffer delay. Handles caching cases
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// if `SetJitterBufferMinimumDelay` is called before start.
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JitterBufferDelay delay_ RTC_GUARDED_BY(worker_thread_);
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// Records if we should generate a keyframe when `media_channel_` gets set up
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// or switched.
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bool saved_generate_keyframe_ RTC_GUARDED_BY(worker_thread_) = false;
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bool saved_encoded_sink_enabled_ RTC_GUARDED_BY(worker_thread_) = false;
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};
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} // namespace webrtc
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#endif // PC_VIDEO_RTP_RECEIVER_H_
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