1 /* 2 * Copyright (c) 2016 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 MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_FIR_H_ 12 #define MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_FIR_H_ 13 14 #include <vector> 15 16 #include "modules/rtp_rtcp/source/rtcp_packet/psfb.h" 17 18 namespace webrtc { 19 namespace rtcp { 20 class CommonHeader; 21 // Full intra request (FIR) (RFC 5104). 22 class Fir : public Psfb { 23 public: 24 static constexpr uint8_t kFeedbackMessageType = 4; 25 struct Request { RequestRequest26 Request() : ssrc(0), seq_nr(0) {} RequestRequest27 Request(uint32_t ssrc, uint8_t seq_nr) : ssrc(ssrc), seq_nr(seq_nr) {} 28 uint32_t ssrc; 29 uint8_t seq_nr; 30 }; 31 32 Fir(); 33 Fir(const Fir& fir); 34 ~Fir() override; 35 36 // Parse assumes header is already parsed and validated. 37 bool Parse(const CommonHeader& packet); 38 AddRequestTo(uint32_t ssrc,uint8_t seq_num)39 void AddRequestTo(uint32_t ssrc, uint8_t seq_num) { 40 items_.emplace_back(ssrc, seq_num); 41 } requests()42 const std::vector<Request>& requests() const { return items_; } 43 44 size_t BlockLength() const override; 45 46 bool Create(uint8_t* packet, 47 size_t* index, 48 size_t max_length, 49 PacketReadyCallback callback) const override; 50 51 private: 52 static constexpr size_t kFciLength = 8; 53 54 // SSRC of media source is not used in FIR packet. Shadow base functions. 55 void SetMediaSsrc(uint32_t ssrc); 56 uint32_t media_ssrc() const; 57 58 std::vector<Request> items_; 59 }; 60 } // namespace rtcp 61 } // namespace webrtc 62 #endif // MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_FIR_H_ 63