1 /* 2 * Copyright 2019 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef PC_VIDEO_RTP_RECEIVER_H_ 12 #define PC_VIDEO_RTP_RECEIVER_H_ 13 14 #include <stdint.h> 15 16 #include <string> 17 #include <vector> 18 19 #include "absl/types/optional.h" 20 #include "api/crypto/frame_decryptor_interface.h" 21 #include "api/dtls_transport_interface.h" 22 #include "api/frame_transformer_interface.h" 23 #include "api/media_stream_interface.h" 24 #include "api/media_stream_track_proxy.h" 25 #include "api/media_types.h" 26 #include "api/rtp_parameters.h" 27 #include "api/rtp_receiver_interface.h" 28 #include "api/scoped_refptr.h" 29 #include "api/sequence_checker.h" 30 #include "api/transport/rtp/rtp_source.h" 31 #include "api/video/video_frame.h" 32 #include "api/video/video_sink_interface.h" 33 #include "api/video/video_source_interface.h" 34 #include "media/base/media_channel.h" 35 #include "pc/jitter_buffer_delay_interface.h" 36 #include "pc/rtp_receiver.h" 37 #include "pc/video_rtp_track_source.h" 38 #include "pc/video_track.h" 39 #include "rtc_base/ref_counted_object.h" 40 #include "rtc_base/thread.h" 41 #include "rtc_base/thread_annotations.h" 42 43 namespace webrtc { 44 45 class VideoRtpReceiver : public rtc::RefCountedObject<RtpReceiverInternal>, 46 public VideoRtpTrackSource::Callback { 47 public: 48 // An SSRC of 0 will create a receiver that will match the first SSRC it 49 // sees. Must be called on signaling thread. 50 VideoRtpReceiver(rtc::Thread* worker_thread, 51 std::string receiver_id, 52 std::vector<std::string> streams_ids); 53 // TODO(hbos): Remove this when streams() is removed. 54 // https://crbug.com/webrtc/9480 55 VideoRtpReceiver( 56 rtc::Thread* worker_thread, 57 const std::string& receiver_id, 58 const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& streams); 59 60 virtual ~VideoRtpReceiver(); 61 video_track()62 rtc::scoped_refptr<VideoTrackInterface> video_track() const { 63 return track_.get(); 64 } 65 66 // RtpReceiverInterface implementation track()67 rtc::scoped_refptr<MediaStreamTrackInterface> track() const override { 68 return track_.get(); 69 } dtls_transport()70 rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override { 71 return dtls_transport_; 72 } 73 std::vector<std::string> stream_ids() const override; streams()74 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams() 75 const override { 76 return streams_; 77 } 78 media_type()79 cricket::MediaType media_type() const override { 80 return cricket::MEDIA_TYPE_VIDEO; 81 } 82 id()83 std::string id() const override { return id_; } 84 85 RtpParameters GetParameters() const override; 86 87 void SetFrameDecryptor( 88 rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor) override; 89 90 rtc::scoped_refptr<FrameDecryptorInterface> GetFrameDecryptor() 91 const override; 92 93 void SetDepacketizerToDecoderFrameTransformer( 94 rtc::scoped_refptr<FrameTransformerInterface> frame_transformer) override; 95 96 // RtpReceiverInternal implementation. 97 void Stop() override; 98 void StopAndEndTrack() override; 99 void SetupMediaChannel(uint32_t ssrc) override; 100 void SetupUnsignaledMediaChannel() override; ssrc()101 uint32_t ssrc() const override { return ssrc_.value_or(0); } 102 void NotifyFirstPacketReceived() override; 103 void set_stream_ids(std::vector<std::string> stream_ids) override; set_transport(rtc::scoped_refptr<DtlsTransportInterface> dtls_transport)104 void set_transport( 105 rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) override { 106 dtls_transport_ = dtls_transport; 107 } 108 void SetStreams(const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& 109 streams) override; 110 111 void SetObserver(RtpReceiverObserverInterface* observer) override; 112 113 void SetJitterBufferMinimumDelay( 114 absl::optional<double> delay_seconds) override; 115 116 void SetMediaChannel(cricket::MediaChannel* media_channel) override; 117 AttachmentId()118 int AttachmentId() const override { return attachment_id_; } 119 120 std::vector<RtpSource> GetSources() const override; 121 122 private: 123 void RestartMediaChannel(absl::optional<uint32_t> ssrc); 124 void SetSink(rtc::VideoSinkInterface<VideoFrame>* sink) 125 RTC_RUN_ON(worker_thread_); 126 127 // VideoRtpTrackSource::Callback 128 void OnGenerateKeyFrame() override; 129 void OnEncodedSinkEnabled(bool enable) override; 130 void SetEncodedSinkEnabled(bool enable) RTC_RUN_ON(worker_thread_); 131 132 rtc::Thread* const worker_thread_; 133 134 const std::string id_; 135 cricket::VideoMediaChannel* media_channel_ = nullptr; 136 absl::optional<uint32_t> ssrc_; 137 // |source_| is held here to be able to change the state of the source when 138 // the VideoRtpReceiver is stopped. 139 rtc::scoped_refptr<VideoRtpTrackSource> source_; 140 rtc::scoped_refptr<VideoTrackProxyWithInternal<VideoTrack>> track_; 141 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_; 142 bool stopped_ = true; 143 RtpReceiverObserverInterface* observer_ = nullptr; 144 bool received_first_packet_ = false; 145 int attachment_id_ = 0; 146 rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_; 147 rtc::scoped_refptr<DtlsTransportInterface> dtls_transport_; 148 rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_ 149 RTC_GUARDED_BY(worker_thread_); 150 // Allows to thread safely change jitter buffer delay. Handles caching cases 151 // if |SetJitterBufferMinimumDelay| is called before start. 152 rtc::scoped_refptr<JitterBufferDelayInterface> delay_; 153 // Records if we should generate a keyframe when |media_channel_| gets set up 154 // or switched. 155 bool saved_generate_keyframe_ RTC_GUARDED_BY(worker_thread_) = false; 156 bool saved_encoded_sink_enabled_ RTC_GUARDED_BY(worker_thread_) = false; 157 }; 158 159 } // namespace webrtc 160 161 #endif // PC_VIDEO_RTP_RECEIVER_H_ 162