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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_BYE; | |
23 using webrtc::RTCPUtility::PT_IJ; | 22 using webrtc::RTCPUtility::PT_IJ; |
24 using webrtc::RTCPUtility::PT_PSFB; | 23 using webrtc::RTCPUtility::PT_PSFB; |
25 using webrtc::RTCPUtility::PT_RR; | 24 using webrtc::RTCPUtility::PT_RR; |
26 using webrtc::RTCPUtility::PT_RTPFB; | 25 using webrtc::RTCPUtility::PT_RTPFB; |
27 using webrtc::RTCPUtility::PT_SDES; | 26 using webrtc::RTCPUtility::PT_SDES; |
28 using webrtc::RTCPUtility::PT_SR; | 27 using webrtc::RTCPUtility::PT_SR; |
29 using webrtc::RTCPUtility::PT_XR; | 28 using webrtc::RTCPUtility::PT_XR; |
30 | 29 |
31 using webrtc::RTCPUtility::RTCPPacketAPP; | 30 using webrtc::RTCPUtility::RTCPPacketAPP; |
32 using webrtc::RTCPUtility::RTCPPacketBYE; | |
33 using webrtc::RTCPUtility::RTCPPacketPSFBAPP; | 31 using webrtc::RTCPUtility::RTCPPacketPSFBAPP; |
34 using webrtc::RTCPUtility::RTCPPacketPSFBFIR; | 32 using webrtc::RTCPUtility::RTCPPacketPSFBFIR; |
35 using webrtc::RTCPUtility::RTCPPacketPSFBFIRItem; | 33 using webrtc::RTCPUtility::RTCPPacketPSFBFIRItem; |
36 using webrtc::RTCPUtility::RTCPPacketPSFBPLI; | 34 using webrtc::RTCPUtility::RTCPPacketPSFBPLI; |
37 using webrtc::RTCPUtility::RTCPPacketPSFBREMBItem; | 35 using webrtc::RTCPUtility::RTCPPacketPSFBREMBItem; |
38 using webrtc::RTCPUtility::RTCPPacketPSFBRPSI; | 36 using webrtc::RTCPUtility::RTCPPacketPSFBRPSI; |
39 using webrtc::RTCPUtility::RTCPPacketPSFBSLI; | 37 using webrtc::RTCPUtility::RTCPPacketPSFBSLI; |
40 using webrtc::RTCPUtility::RTCPPacketPSFBSLIItem; | 38 using webrtc::RTCPUtility::RTCPPacketPSFBSLIItem; |
41 using webrtc::RTCPUtility::RTCPPacketReportBlockItem; | 39 using webrtc::RTCPUtility::RTCPPacketReportBlockItem; |
42 using webrtc::RTCPUtility::RTCPPacketRR; | 40 using webrtc::RTCPUtility::RTCPPacketRR; |
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198 AssignUWord32(buffer, pos, (*it).ssrc); | 196 AssignUWord32(buffer, pos, (*it).ssrc); |
199 AssignUWord8(buffer, pos, kSdesItemType); | 197 AssignUWord8(buffer, pos, kSdesItemType); |
200 AssignUWord8(buffer, pos, (*it).name.length()); | 198 AssignUWord8(buffer, pos, (*it).name.length()); |
201 memcpy(buffer + *pos, (*it).name.data(), (*it).name.length()); | 199 memcpy(buffer + *pos, (*it).name.data(), (*it).name.length()); |
202 *pos += (*it).name.length(); | 200 *pos += (*it).name.length(); |
203 memset(buffer + *pos, 0, (*it).null_octets); | 201 memset(buffer + *pos, 0, (*it).null_octets); |
204 *pos += (*it).null_octets; | 202 *pos += (*it).null_octets; |
205 } | 203 } |
206 } | 204 } |
207 | 205 |
208 // Bye packet (BYE) (RFC 3550). | |
209 // | |
210 // 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 | |
211 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
212 // |V=2|P| SC | PT=BYE=203 | length | | |
213 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
214 // | SSRC/CSRC | | |
215 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
216 // : ... : | |
217 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | |
218 // (opt) | length | reason for leaving ... | |
219 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
220 | |
221 void CreateBye(const RTCPPacketBYE& bye, | |
222 const std::vector<uint32_t>& csrcs, | |
223 uint8_t* buffer, | |
224 size_t* pos) { | |
225 AssignUWord32(buffer, pos, bye.SenderSSRC); | |
226 for (uint32_t csrc : csrcs) | |
227 AssignUWord32(buffer, pos, csrc); | |
228 } | |
229 | |
230 // RFC 4585: Feedback format. | 206 // RFC 4585: Feedback format. |
231 // | 207 // |
232 // Common packet format: | 208 // Common packet format: |
233 // | 209 // |
234 // 0 1 2 3 | 210 // 0 1 2 3 |
235 // 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 | 211 // 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 |
236 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 212 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
237 // |V=2|P| FMT | PT | length | | 213 // |V=2|P| FMT | PT | length | |
238 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 214 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
239 // | SSRC of packet sender | | 215 // | SSRC of packet sender | |
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794 // Header (4 bytes). | 770 // Header (4 bytes). |
795 // Chunk: | 771 // Chunk: |
796 // SSRC/CSRC (4 bytes) | CNAME (1 byte) | length (1 byte) | name | padding. | 772 // SSRC/CSRC (4 bytes) | CNAME (1 byte) | length (1 byte) | name | padding. |
797 size_t length = kHeaderLength; | 773 size_t length = kHeaderLength; |
798 for (const Chunk& chunk : chunks_) | 774 for (const Chunk& chunk : chunks_) |
799 length += 6 + chunk.name.length() + chunk.null_octets; | 775 length += 6 + chunk.name.length() + chunk.null_octets; |
800 assert(length % 4 == 0); | 776 assert(length % 4 == 0); |
801 return length; | 777 return length; |
802 } | 778 } |
803 | 779 |
804 bool Bye::Create(uint8_t* packet, | |
805 size_t* index, | |
806 size_t max_length, | |
807 RtcpPacket::PacketReadyCallback* callback) const { | |
808 while (*index + BlockLength() > max_length) { | |
809 if (!OnBufferFull(packet, index, callback)) | |
810 return false; | |
811 } | |
812 size_t length = HeaderLength(); | |
813 CreateHeader(length, PT_BYE, length, packet, index); | |
814 CreateBye(bye_, csrcs_, packet, index); | |
815 return true; | |
816 } | |
817 | |
818 bool Bye::WithCsrc(uint32_t csrc) { | |
819 if (csrcs_.size() >= kMaxNumberOfCsrcs) { | |
820 LOG(LS_WARNING) << "Max CSRC size reached."; | |
821 return false; | |
822 } | |
823 csrcs_.push_back(csrc); | |
824 return true; | |
825 } | |
826 | |
827 bool Pli::Create(uint8_t* packet, | 780 bool Pli::Create(uint8_t* packet, |
828 size_t* index, | 781 size_t* index, |
829 size_t max_length, | 782 size_t max_length, |
830 RtcpPacket::PacketReadyCallback* callback) const { | 783 RtcpPacket::PacketReadyCallback* callback) const { |
831 while (*index + BlockLength() > max_length) { | 784 while (*index + BlockLength() > max_length) { |
832 if (!OnBufferFull(packet, index, callback)) | 785 if (!OnBufferFull(packet, index, callback)) |
833 return false; | 786 return false; |
834 } | 787 } |
835 const uint8_t kFmt = 1; | 788 const uint8_t kFmt = 1; |
836 CreateHeader(kFmt, PT_PSFB, HeaderLength(), packet, index); | 789 CreateHeader(kFmt, PT_PSFB, HeaderLength(), packet, index); |
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1132 return length_; | 1085 return length_; |
1133 } | 1086 } |
1134 | 1087 |
1135 void RawPacket::SetLength(size_t length) { | 1088 void RawPacket::SetLength(size_t length) { |
1136 assert(length <= buffer_length_); | 1089 assert(length <= buffer_length_); |
1137 length_ = length; | 1090 length_ = length; |
1138 } | 1091 } |
1139 | 1092 |
1140 } // namespace rtcp | 1093 } // namespace rtcp |
1141 } // namespace webrtc | 1094 } // namespace webrtc |
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