1 /* 2 * Copyright (c) 2017 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 #ifndef CALL_RTP_STREAM_RECEIVER_CONTROLLER_H_ 11 #define CALL_RTP_STREAM_RECEIVER_CONTROLLER_H_ 12 13 #include <memory> 14 15 #include "api/sequence_checker.h" 16 #include "call/rtp_demuxer.h" 17 #include "call/rtp_stream_receiver_controller_interface.h" 18 19 namespace webrtc { 20 21 class RtpPacketReceived; 22 23 // This class represents the RTP receive parsing and demuxing, for a 24 // single RTP session. 25 // TODO(bugs.webrtc.org/7135): Add RTCP processing, we should aim to terminate 26 // RTCP and not leave any RTCP processing to individual receive streams. 27 class RtpStreamReceiverController 28 : public RtpStreamReceiverControllerInterface { 29 public: 30 RtpStreamReceiverController(); 31 ~RtpStreamReceiverController() override; 32 33 // Implements RtpStreamReceiverControllerInterface. 34 std::unique_ptr<RtpStreamReceiverInterface> CreateReceiver( 35 uint32_t ssrc, 36 RtpPacketSinkInterface* sink) override; 37 38 // TODO(bugs.webrtc.org/7135): Not yet responsible for parsing. 39 bool OnRtpPacket(const RtpPacketReceived& packet); 40 41 private: 42 class Receiver : public RtpStreamReceiverInterface { 43 public: 44 Receiver(RtpStreamReceiverController* controller, 45 uint32_t ssrc, 46 RtpPacketSinkInterface* sink); 47 48 ~Receiver() override; 49 50 private: 51 RtpStreamReceiverController* const controller_; 52 RtpPacketSinkInterface* const sink_; 53 }; 54 55 // Thread-safe wrappers for the corresponding RtpDemuxer methods. 56 bool AddSink(uint32_t ssrc, RtpPacketSinkInterface* sink); 57 bool RemoveSink(const RtpPacketSinkInterface* sink); 58 59 // TODO(bugs.webrtc.org/11993): We expect construction and all methods to be 60 // called on the same thread/tq. Currently this is the worker thread 61 // (including OnRtpPacket) but a more natural fit would be the network thread. 62 // Using a sequence checker to ensure that usage is correct but at the same 63 // time not require a specific thread/tq, an instance of this class + the 64 // associated functionality should be easily moved from one execution context 65 // to another (i.e. when network packets don't hop to the worker thread inside 66 // of Call). 67 SequenceChecker demuxer_sequence_; 68 // At this level the demuxer is only configured to demux by SSRC, so don't 69 // worry about MIDs (MIDs are handled by upper layers). 70 RtpDemuxer demuxer_ RTC_GUARDED_BY(&demuxer_sequence_){false /*use_mid*/}; 71 }; 72 73 } // namespace webrtc 74 75 #endif // CALL_RTP_STREAM_RECEIVER_CONTROLLER_H_ 76