1 /* 2 * Copyright (c) 2015 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 12 #ifndef MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_ 13 #define MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_ 14 15 #include <stddef.h> 16 #include <stdint.h> 17 18 #include <vector> 19 20 namespace webrtc { 21 namespace rtcp { 22 struct ReceiveTimeInfo { 23 // RFC 3611 4.5 ReceiveTimeInfoReceiveTimeInfo24 ReceiveTimeInfo() : ssrc(0), last_rr(0), delay_since_last_rr(0) {} ReceiveTimeInfoReceiveTimeInfo25 ReceiveTimeInfo(uint32_t ssrc, uint32_t last_rr, uint32_t delay) 26 : ssrc(ssrc), last_rr(last_rr), delay_since_last_rr(delay) {} 27 28 uint32_t ssrc; 29 uint32_t last_rr; 30 uint32_t delay_since_last_rr; 31 }; 32 33 inline bool operator==(const ReceiveTimeInfo& lhs, const ReceiveTimeInfo& rhs) { 34 return lhs.ssrc == rhs.ssrc && lhs.last_rr == rhs.last_rr && 35 lhs.delay_since_last_rr == rhs.delay_since_last_rr; 36 } 37 38 inline bool operator!=(const ReceiveTimeInfo& lhs, const ReceiveTimeInfo& rhs) { 39 return !(lhs == rhs); 40 } 41 42 // DLRR Report Block: Delay since the Last Receiver Report (RFC 3611). 43 class Dlrr { 44 public: 45 static const uint8_t kBlockType = 5; 46 47 Dlrr(); 48 Dlrr(const Dlrr& other); 49 ~Dlrr(); 50 51 Dlrr& operator=(const Dlrr& other) = default; 52 53 // Dlrr without items treated same as no dlrr block. 54 explicit operator bool() const { return !sub_blocks_.empty(); } 55 56 // Second parameter is value read from block header, 57 // i.e. size of block in 32bits excluding block header itself. 58 bool Parse(const uint8_t* buffer, uint16_t block_length_32bits); 59 60 size_t BlockLength() const; 61 // Fills buffer with the Dlrr. 62 // Consumes BlockLength() bytes. 63 void Create(uint8_t* buffer) const; 64 ClearItems()65 void ClearItems() { sub_blocks_.clear(); } AddDlrrItem(const ReceiveTimeInfo & time_info)66 void AddDlrrItem(const ReceiveTimeInfo& time_info) { 67 sub_blocks_.push_back(time_info); 68 } 69 sub_blocks()70 const std::vector<ReceiveTimeInfo>& sub_blocks() const { return sub_blocks_; } 71 72 private: 73 static const size_t kBlockHeaderLength = 4; 74 static const size_t kSubBlockLength = 12; 75 76 std::vector<ReceiveTimeInfo> sub_blocks_; 77 }; 78 } // namespace rtcp 79 } // namespace webrtc 80 #endif // MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_DLRR_H_ 81