1 /* 2 * Copyright (c) 2012 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 WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_ 12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_ 13 14 #include <list> 15 16 #include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h" 17 18 namespace webrtc { 19 20 struct RtpPacket; 21 22 class RedPacket { 23 public: 24 explicit RedPacket(int length); 25 ~RedPacket(); 26 void CreateHeader(const uint8_t* rtp_header, int header_length, 27 int red_pl_type, int pl_type); 28 void SetSeqNum(int seq_num); 29 void AssignPayload(const uint8_t* payload, int length); 30 void ClearMarkerBit(); 31 uint8_t* data() const; 32 int length() const; 33 34 private: 35 uint8_t* data_; 36 int length_; 37 int header_length_; 38 }; 39 40 class ProducerFec { 41 public: 42 explicit ProducerFec(ForwardErrorCorrection* fec); 43 ~ProducerFec(); 44 45 void SetFecParameters(const FecProtectionParams* params, 46 int max_fec_frames); 47 48 RedPacket* BuildRedPacket(const uint8_t* data_buffer, 49 int payload_length, 50 int rtp_header_length, 51 int red_pl_type); 52 53 int AddRtpPacketAndGenerateFec(const uint8_t* data_buffer, 54 int payload_length, 55 int rtp_header_length); 56 57 bool ExcessOverheadBelowMax(); 58 59 bool MinimumMediaPacketsReached(); 60 61 bool FecAvailable() const; 62 63 RedPacket* GetFecPacket(int red_pl_type, 64 int fec_pl_type, 65 uint16_t seq_num, 66 int rtp_header_length); 67 68 private: 69 void DeletePackets(); 70 int Overhead() const; 71 ForwardErrorCorrection* fec_; 72 std::list<ForwardErrorCorrection::Packet*> media_packets_fec_; 73 std::list<ForwardErrorCorrection::Packet*> fec_packets_; 74 int num_frames_; 75 bool incomplete_frame_; 76 int num_first_partition_; 77 int minimum_media_packets_fec_; 78 FecProtectionParams params_; 79 FecProtectionParams new_params_; 80 }; 81 82 } // namespace webrtc 83 84 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_PRODUCER_FEC_H_ 85