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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 |
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198 AssignUWord32(buffer, pos, (*it).ssrc); | 198 AssignUWord32(buffer, pos, (*it).ssrc); |
199 AssignUWord8(buffer, pos, kSdesItemType); | 199 AssignUWord8(buffer, pos, kSdesItemType); |
200 AssignUWord8(buffer, pos, (*it).name.length()); | 200 AssignUWord8(buffer, pos, (*it).name.length()); |
201 memcpy(buffer + *pos, (*it).name.data(), (*it).name.length()); | 201 memcpy(buffer + *pos, (*it).name.data(), (*it).name.length()); |
202 *pos += (*it).name.length(); | 202 *pos += (*it).name.length(); |
203 memset(buffer + *pos, 0, (*it).null_octets); | 203 memset(buffer + *pos, 0, (*it).null_octets); |
204 *pos += (*it).null_octets; | 204 *pos += (*it).null_octets; |
205 } | 205 } |
206 } | 206 } |
207 | 207 |
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 // Application-Defined packet (APP) (RFC 3550). | 208 // Application-Defined packet (APP) (RFC 3550). |
231 // | 209 // |
232 // 0 1 2 3 | 210 // 0 1 2 3 |
233 // 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 |
234 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 212 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
235 // |V=2|P| subtype | PT=APP=204 | length | | 213 // |V=2|P| subtype | PT=APP=204 | length | |
236 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 214 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
237 // | SSRC/CSRC | | 215 // | SSRC/CSRC | |
238 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 216 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
239 // | name (ASCII) | | 217 // | name (ASCII) | |
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818 // Header (4 bytes). | 796 // Header (4 bytes). |
819 // Chunk: | 797 // Chunk: |
820 // SSRC/CSRC (4 bytes) | CNAME (1 byte) | length (1 byte) | name | padding. | 798 // SSRC/CSRC (4 bytes) | CNAME (1 byte) | length (1 byte) | name | padding. |
821 size_t length = kHeaderLength; | 799 size_t length = kHeaderLength; |
822 for (const Chunk& chunk : chunks_) | 800 for (const Chunk& chunk : chunks_) |
823 length += 6 + chunk.name.length() + chunk.null_octets; | 801 length += 6 + chunk.name.length() + chunk.null_octets; |
824 assert(length % 4 == 0); | 802 assert(length % 4 == 0); |
825 return length; | 803 return length; |
826 } | 804 } |
827 | 805 |
828 bool Bye::Create(uint8_t* packet, | |
829 size_t* index, | |
830 size_t max_length, | |
831 RtcpPacket::PacketReadyCallback* callback) const { | |
832 while (*index + BlockLength() > max_length) { | |
833 if (!OnBufferFull(packet, index, callback)) | |
834 return false; | |
835 } | |
836 size_t length = HeaderLength(); | |
837 CreateHeader(length, PT_BYE, length, packet, index); | |
838 CreateBye(bye_, csrcs_, packet, index); | |
839 return true; | |
840 } | |
841 | |
842 bool Bye::WithCsrc(uint32_t csrc) { | |
843 if (csrcs_.size() >= kMaxNumberOfCsrcs) { | |
844 LOG(LS_WARNING) << "Max CSRC size reached."; | |
845 return false; | |
846 } | |
847 csrcs_.push_back(csrc); | |
848 return true; | |
849 } | |
850 | |
851 bool App::Create(uint8_t* packet, | 806 bool App::Create(uint8_t* packet, |
852 size_t* index, | 807 size_t* index, |
853 size_t max_length, | 808 size_t max_length, |
854 RtcpPacket::PacketReadyCallback* callback) const { | 809 RtcpPacket::PacketReadyCallback* callback) const { |
855 while (*index + BlockLength() > max_length) { | 810 while (*index + BlockLength() > max_length) { |
856 if (!OnBufferFull(packet, index, callback)) | 811 if (!OnBufferFull(packet, index, callback)) |
857 return false; | 812 return false; |
858 } | 813 } |
859 CreateHeader(app_.SubType, PT_APP, HeaderLength(), packet, index); | 814 CreateHeader(app_.SubType, PT_APP, HeaderLength(), packet, index); |
860 CreateApp(app_, ssrc_, packet, index); | 815 CreateApp(app_, ssrc_, packet, index); |
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1169 return length_; | 1124 return length_; |
1170 } | 1125 } |
1171 | 1126 |
1172 void RawPacket::SetLength(size_t length) { | 1127 void RawPacket::SetLength(size_t length) { |
1173 assert(length <= buffer_length_); | 1128 assert(length <= buffer_length_); |
1174 length_ = length; | 1129 length_ = length; |
1175 } | 1130 } |
1176 | 1131 |
1177 } // namespace rtcp | 1132 } // namespace rtcp |
1178 } // namespace webrtc | 1133 } // namespace webrtc |
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