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 
11 #ifndef CALL_RTX_RECEIVE_STREAM_H_
12 #define CALL_RTX_RECEIVE_STREAM_H_
13 
14 #include <cstdint>
15 #include <map>
16 
17 #include "call/rtp_packet_sink_interface.h"
18 
19 namespace webrtc {
20 
21 class ReceiveStatistics;
22 
23 // This class is responsible for RTX decapsulation. The resulting media packets
24 // are passed on to a sink representing the associated media stream.
25 class RtxReceiveStream : public RtpPacketSinkInterface {
26  public:
27   RtxReceiveStream(RtpPacketSinkInterface* media_sink,
28                    std::map<int, int> associated_payload_types,
29                    uint32_t media_ssrc,
30                    // TODO(nisse): Delete this argument, and
31                    // corresponding member variable, by moving the
32                    // responsibility for rtcp feedback to
33                    // RtpStreamReceiverController.
34                    ReceiveStatistics* rtp_receive_statistics = nullptr);
35   ~RtxReceiveStream() override;
36   // RtpPacketSinkInterface.
37   void OnRtpPacket(const RtpPacketReceived& packet) override;
38 
39  private:
40   RtpPacketSinkInterface* const media_sink_;
41   // Map from rtx payload type -> media payload type.
42   const std::map<int, int> associated_payload_types_;
43   // TODO(nisse): Ultimately, the media receive stream shouldn't care about the
44   // ssrc, and we should delete this.
45   const uint32_t media_ssrc_;
46   ReceiveStatistics* const rtp_receive_statistics_;
47 };
48 
49 }  // namespace webrtc
50 
51 #endif  // CALL_RTX_RECEIVE_STREAM_H_
52