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| 1 /* | 1 /* |
| 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h" | 11 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h" |
| 12 | 12 |
| 13 #include "webrtc/base/checks.h" | 13 #include "webrtc/base/checks.h" |
| 14 #include "webrtc/base/logging.h" | 14 #include "webrtc/base/logging.h" |
| 15 #include "webrtc/modules/rtp_rtcp/source/byte_io.h" | 15 #include "webrtc/modules/rtp_rtcp/source/byte_io.h" |
| 16 | 16 |
| 17 using webrtc::RTCPUtility::kBtDlrr; | 17 using webrtc::RTCPUtility::kBtDlrr; |
| 18 using webrtc::RTCPUtility::kBtReceiverReferenceTime; | 18 using webrtc::RTCPUtility::kBtReceiverReferenceTime; |
| 19 using webrtc::RTCPUtility::kBtVoipMetric; | 19 using webrtc::RTCPUtility::kBtVoipMetric; |
| 20 | 20 |
| 21 using webrtc::RTCPUtility::PT_APP; | 21 using webrtc::RTCPUtility::PT_APP; |
| 22 using webrtc::RTCPUtility::PT_IJ; | 22 using webrtc::RTCPUtility::PT_IJ; |
| 23 using webrtc::RTCPUtility::PT_PSFB; | 23 using webrtc::RTCPUtility::PT_PSFB; |
| 24 using webrtc::RTCPUtility::PT_RR; | |
| 25 using webrtc::RTCPUtility::PT_RTPFB; | 24 using webrtc::RTCPUtility::PT_RTPFB; |
| 26 using webrtc::RTCPUtility::PT_SDES; | 25 using webrtc::RTCPUtility::PT_SDES; |
| 27 using webrtc::RTCPUtility::PT_SR; | 26 using webrtc::RTCPUtility::PT_SR; |
| 28 using webrtc::RTCPUtility::PT_XR; | 27 using webrtc::RTCPUtility::PT_XR; |
| 29 | 28 |
| 30 using webrtc::RTCPUtility::RTCPPacketAPP; | 29 using webrtc::RTCPUtility::RTCPPacketAPP; |
| 31 using webrtc::RTCPUtility::RTCPPacketPSFBAPP; | 30 using webrtc::RTCPUtility::RTCPPacketPSFBAPP; |
| 32 using webrtc::RTCPUtility::RTCPPacketPSFBFIR; | 31 using webrtc::RTCPUtility::RTCPPacketPSFBFIR; |
| 33 using webrtc::RTCPUtility::RTCPPacketPSFBFIRItem; | 32 using webrtc::RTCPUtility::RTCPPacketPSFBFIRItem; |
| 34 using webrtc::RTCPUtility::RTCPPacketPSFBREMBItem; | 33 using webrtc::RTCPUtility::RTCPPacketPSFBREMBItem; |
| 35 using webrtc::RTCPUtility::RTCPPacketPSFBRPSI; | 34 using webrtc::RTCPUtility::RTCPPacketPSFBRPSI; |
| 36 using webrtc::RTCPUtility::RTCPPacketPSFBSLI; | 35 using webrtc::RTCPUtility::RTCPPacketPSFBSLI; |
| 37 using webrtc::RTCPUtility::RTCPPacketPSFBSLIItem; | 36 using webrtc::RTCPUtility::RTCPPacketPSFBSLIItem; |
| 38 using webrtc::RTCPUtility::RTCPPacketReportBlockItem; | 37 using webrtc::RTCPUtility::RTCPPacketReportBlockItem; |
| 39 using webrtc::RTCPUtility::RTCPPacketRR; | |
| 40 using webrtc::RTCPUtility::RTCPPacketRTPFBNACK; | 38 using webrtc::RTCPUtility::RTCPPacketRTPFBNACK; |
| 41 using webrtc::RTCPUtility::RTCPPacketRTPFBNACKItem; | 39 using webrtc::RTCPUtility::RTCPPacketRTPFBNACKItem; |
| 42 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBN; | 40 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBN; |
| 43 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBNItem; | 41 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBNItem; |
| 44 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBR; | 42 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBR; |
| 45 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBRItem; | 43 using webrtc::RTCPUtility::RTCPPacketRTPFBTMMBRItem; |
| 46 using webrtc::RTCPUtility::RTCPPacketSR; | 44 using webrtc::RTCPUtility::RTCPPacketSR; |
| 47 using webrtc::RTCPUtility::RTCPPacketXRDLRRReportBlockItem; | 45 using webrtc::RTCPUtility::RTCPPacketXRDLRRReportBlockItem; |
| 48 using webrtc::RTCPUtility::RTCPPacketXRReceiverReferenceTimeItem; | 46 using webrtc::RTCPUtility::RTCPPacketXRReceiverReferenceTimeItem; |
| 49 using webrtc::RTCPUtility::RTCPPacketXR; | 47 using webrtc::RTCPUtility::RTCPPacketXR; |
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| 112 uint8_t* buffer, | 110 uint8_t* buffer, |
| 113 size_t* pos) { | 111 size_t* pos) { |
| 114 AssignUWord32(buffer, pos, sr.SenderSSRC); | 112 AssignUWord32(buffer, pos, sr.SenderSSRC); |
| 115 AssignUWord32(buffer, pos, sr.NTPMostSignificant); | 113 AssignUWord32(buffer, pos, sr.NTPMostSignificant); |
| 116 AssignUWord32(buffer, pos, sr.NTPLeastSignificant); | 114 AssignUWord32(buffer, pos, sr.NTPLeastSignificant); |
| 117 AssignUWord32(buffer, pos, sr.RTPTimestamp); | 115 AssignUWord32(buffer, pos, sr.RTPTimestamp); |
| 118 AssignUWord32(buffer, pos, sr.SenderPacketCount); | 116 AssignUWord32(buffer, pos, sr.SenderPacketCount); |
| 119 AssignUWord32(buffer, pos, sr.SenderOctetCount); | 117 AssignUWord32(buffer, pos, sr.SenderOctetCount); |
| 120 } | 118 } |
| 121 | 119 |
| 122 // Receiver report (RR), header (RFC 3550). | |
| 123 // | |
| 124 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
| 125 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 126 // |V=2|P| RC | PT=RR=201 | length | | |
| 127 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 128 // | SSRC of packet sender | | |
| 129 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | |
| 130 | |
| 131 void CreateReceiverReport(const RTCPPacketRR& rr, | |
| 132 uint8_t* buffer, | |
| 133 size_t* pos) { | |
| 134 AssignUWord32(buffer, pos, rr.SenderSSRC); | |
| 135 } | |
| 136 | |
| 137 // Report block (RFC 3550). | 120 // Report block (RFC 3550). |
| 138 // | 121 // |
| 139 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | 122 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 140 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | 123 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ |
| 141 // | SSRC_1 (SSRC of first source) | | 124 // | SSRC_1 (SSRC of first source) | |
| 142 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 125 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 143 // | fraction lost | cumulative number of packets lost | | 126 // | fraction lost | cumulative number of packets lost | |
| 144 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 127 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 145 // | extended highest sequence number received | | 128 // | extended highest sequence number received | |
| 146 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 129 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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| 674 bool SenderReport::WithReportBlock(const ReportBlock& block) { | 657 bool SenderReport::WithReportBlock(const ReportBlock& block) { |
| 675 if (report_blocks_.size() >= kMaxNumberOfReportBlocks) { | 658 if (report_blocks_.size() >= kMaxNumberOfReportBlocks) { |
| 676 LOG(LS_WARNING) << "Max report blocks reached."; | 659 LOG(LS_WARNING) << "Max report blocks reached."; |
| 677 return false; | 660 return false; |
| 678 } | 661 } |
| 679 report_blocks_.push_back(block); | 662 report_blocks_.push_back(block); |
| 680 sr_.NumberOfReportBlocks = report_blocks_.size(); | 663 sr_.NumberOfReportBlocks = report_blocks_.size(); |
| 681 return true; | 664 return true; |
| 682 } | 665 } |
| 683 | 666 |
| 684 bool ReceiverReport::Create(uint8_t* packet, | |
| 685 size_t* index, | |
| 686 size_t max_length, | |
| 687 RtcpPacket::PacketReadyCallback* callback) const { | |
| 688 while (*index + BlockLength() > max_length) { | |
| 689 if (!OnBufferFull(packet, index, callback)) | |
| 690 return false; | |
| 691 } | |
| 692 CreateHeader(rr_.NumberOfReportBlocks, PT_RR, HeaderLength(), packet, index); | |
| 693 CreateReceiverReport(rr_, packet, index); | |
| 694 CreateReportBlocks(report_blocks_, packet, index); | |
| 695 return true; | |
| 696 } | |
| 697 | |
| 698 bool ReceiverReport::WithReportBlock(const ReportBlock& block) { | |
| 699 if (report_blocks_.size() >= kMaxNumberOfReportBlocks) { | |
| 700 LOG(LS_WARNING) << "Max report blocks reached."; | |
| 701 return false; | |
| 702 } | |
| 703 report_blocks_.push_back(block); | |
| 704 rr_.NumberOfReportBlocks = report_blocks_.size(); | |
| 705 return true; | |
| 706 } | |
| 707 | |
| 708 bool Sdes::Create(uint8_t* packet, | 667 bool Sdes::Create(uint8_t* packet, |
| 709 size_t* index, | 668 size_t* index, |
| 710 size_t max_length, | 669 size_t max_length, |
| 711 RtcpPacket::PacketReadyCallback* callback) const { | 670 RtcpPacket::PacketReadyCallback* callback) const { |
| 712 assert(!chunks_.empty()); | 671 assert(!chunks_.empty()); |
| 713 while (*index + BlockLength() > max_length) { | 672 while (*index + BlockLength() > max_length) { |
| 714 if (!OnBufferFull(packet, index, callback)) | 673 if (!OnBufferFull(packet, index, callback)) |
| 715 return false; | 674 return false; |
| 716 } | 675 } |
| 717 CreateHeader(chunks_.size(), PT_SDES, HeaderLength(), packet, index); | 676 CreateHeader(chunks_.size(), PT_SDES, HeaderLength(), packet, index); |
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| 1042 return length_; | 1001 return length_; |
| 1043 } | 1002 } |
| 1044 | 1003 |
| 1045 void RawPacket::SetLength(size_t length) { | 1004 void RawPacket::SetLength(size_t length) { |
| 1046 assert(length <= buffer_length_); | 1005 assert(length <= buffer_length_); |
| 1047 length_ = length; | 1006 length_ = length; |
| 1048 } | 1007 } |
| 1049 | 1008 |
| 1050 } // namespace rtcp | 1009 } // namespace rtcp |
| 1051 } // namespace webrtc | 1010 } // namespace webrtc |
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