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niklase@google.com470e71d2011-07-07 08:21:25 +00001/*
pwestin@webrtc.orgf6bb77a2012-01-24 17:16:59 +00002 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
niklase@google.com470e71d2011-07-07 08:21:25 +00003 *
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
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020011#include "modules/rtp_rtcp/source/rtp_utility.h"
niklase@google.com470e71d2011-07-07 08:21:25 +000012
Yves Gerey988cc082018-10-23 12:03:01 +020013#include <assert.h>
14#include <stddef.h>
15
16#include "api/array_view.h"
17#include "api/video/video_content_type.h"
18#include "api/video/video_frame_marking.h"
19#include "api/video/video_rotation.h"
20#include "api/video/video_timing.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020021#include "modules/rtp_rtcp/include/rtp_cvo.h"
22#include "modules/rtp_rtcp/source/byte_io.h"
23#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
Yves Gerey988cc082018-10-23 12:03:01 +020024#include "modules/video_coding/codecs/interface/common_constants.h"
25#include "rtc_base/checks.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020026#include "rtc_base/logging.h"
Sergey Ulanov6acefdb2017-12-11 17:38:13 -080027#include "rtc_base/stringutils.h"
niklase@google.com470e71d2011-07-07 08:21:25 +000028
niklase@google.com470e71d2011-07-07 08:21:25 +000029namespace webrtc {
pwestin@webrtc.org0644b1d2011-12-01 15:42:31 +000030
pbos@webrtc.org62bafae2014-07-08 12:10:51 +000031namespace RtpUtility {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +000032
solenberg@webrtc.orgd8a6e722013-03-26 14:02:30 +000033enum {
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +000034 kRtcpExpectedVersion = 2,
solenberg@webrtc.orgd8a6e722013-03-26 14:02:30 +000035 kRtcpMinHeaderLength = 4,
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +000036 kRtcpMinParseLength = 8,
37
38 kRtpExpectedVersion = 2,
39 kRtpMinParseLength = 12
solenberg@webrtc.orgd8a6e722013-03-26 14:02:30 +000040};
41
pwestin@webrtc.org0644b1d2011-12-01 15:42:31 +000042/*
pwestin@webrtc.org0644b1d2011-12-01 15:42:31 +000043 * Misc utility routines
44 */
45
sprang@webrtc.org30933902015-03-17 14:33:12 +000046size_t Word32Align(size_t size) {
47 uint32_t remainder = size % 4;
48 if (remainder != 0)
49 return size + 4 - remainder;
50 return size;
51}
52
pbos@webrtc.org62bafae2014-07-08 12:10:51 +000053RtpHeaderParser::RtpHeaderParser(const uint8_t* rtpData,
54 const size_t rtpDataLength)
55 : _ptrRTPDataBegin(rtpData),
Yves Gerey665174f2018-06-19 15:03:05 +020056 _ptrRTPDataEnd(rtpData ? (rtpData + rtpDataLength) : NULL) {}
niklase@google.com470e71d2011-07-07 08:21:25 +000057
Yves Gerey665174f2018-06-19 15:03:05 +020058RtpHeaderParser::~RtpHeaderParser() {}
niklase@google.com470e71d2011-07-07 08:21:25 +000059
pbos@webrtc.org62bafae2014-07-08 12:10:51 +000060bool RtpHeaderParser::RTCP() const {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +000061 // 72 to 76 is reserved for RTP
62 // 77 to 79 is not reserver but they are not assigned we will block them
63 // for RTCP 200 SR == marker bit + 72
64 // for RTCP 204 APP == marker bit + 76
65 /*
Yves Gerey665174f2018-06-19 15:03:05 +020066 * RTCP
67 *
68 * FIR full INTRA-frame request 192 [RFC2032] supported
69 * NACK negative acknowledgement 193 [RFC2032]
70 * IJ Extended inter-arrival jitter report 195 [RFC-ietf-avt-rtp-toff
71 * set-07.txt] http://tools.ietf.org/html/draft-ietf-avt-rtp-toffset-07
72 * SR sender report 200 [RFC3551] supported
73 * RR receiver report 201 [RFC3551] supported
74 * SDES source description 202 [RFC3551] supported
75 * BYE goodbye 203 [RFC3551] supported
76 * APP application-defined 204 [RFC3551] ignored
77 * RTPFB Transport layer FB message 205 [RFC4585] supported
78 * PSFB Payload-specific FB message 206 [RFC4585] supported
79 * XR extended report 207 [RFC3611] supported
80 */
niklase@google.com470e71d2011-07-07 08:21:25 +000081
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +000082 /* 205 RFC 5104
83 * FMT 1 NACK supported
84 * FMT 2 reserved
85 * FMT 3 TMMBR supported
86 * FMT 4 TMMBN supported
87 */
niklase@google.com470e71d2011-07-07 08:21:25 +000088
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +000089 /* 206 RFC 5104
Yves Gerey665174f2018-06-19 15:03:05 +020090 * FMT 1: Picture Loss Indication (PLI) supported
91 * FMT 2: Slice Lost Indication (SLI)
92 * FMT 3: Reference Picture Selection Indication (RPSI)
93 * FMT 4: Full Intra Request (FIR) Command supported
94 * FMT 5: Temporal-Spatial Trade-off Request (TSTR)
95 * FMT 6: Temporal-Spatial Trade-off Notification (TSTN)
96 * FMT 7: Video Back Channel Message (VBCM)
97 * FMT 15: Application layer FB message
98 */
niklase@google.com470e71d2011-07-07 08:21:25 +000099
solenberg@webrtc.orgd8a6e722013-03-26 14:02:30 +0000100 const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
101 if (length < kRtcpMinHeaderLength) {
102 return false;
103 }
104
pkasting@chromium.orgd3245462015-02-23 21:28:22 +0000105 const uint8_t V = _ptrRTPDataBegin[0] >> 6;
solenberg@webrtc.orgd8a6e722013-03-26 14:02:30 +0000106 if (V != kRtcpExpectedVersion) {
107 return false;
108 }
109
pkasting@chromium.orgd3245462015-02-23 21:28:22 +0000110 const uint8_t payloadType = _ptrRTPDataBegin[1];
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000111 switch (payloadType) {
niklase@google.com470e71d2011-07-07 08:21:25 +0000112 case 192:
pkasting@chromium.orgd3245462015-02-23 21:28:22 +0000113 return true;
niklase@google.com470e71d2011-07-07 08:21:25 +0000114 case 193:
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000115 // not supported
116 // pass through and check for a potential RTP packet
pkasting@chromium.orgd3245462015-02-23 21:28:22 +0000117 return false;
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000118 case 195:
niklase@google.com470e71d2011-07-07 08:21:25 +0000119 case 200:
120 case 201:
121 case 202:
122 case 203:
123 case 204:
124 case 205:
125 case 206:
126 case 207:
pkasting@chromium.orgd3245462015-02-23 21:28:22 +0000127 return true;
128 default:
129 return false;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000130 }
niklase@google.com470e71d2011-07-07 08:21:25 +0000131}
132
pbos@webrtc.org62bafae2014-07-08 12:10:51 +0000133bool RtpHeaderParser::ParseRtcp(RTPHeader* header) const {
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000134 assert(header != NULL);
135
136 const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
137 if (length < kRtcpMinParseLength) {
138 return false;
139 }
140
141 const uint8_t V = _ptrRTPDataBegin[0] >> 6;
142 if (V != kRtcpExpectedVersion) {
143 return false;
144 }
145
146 const uint8_t PT = _ptrRTPDataBegin[1];
pkasting@chromium.org4591fbd2014-11-20 22:28:14 +0000147 const size_t len = (_ptrRTPDataBegin[2] << 8) + _ptrRTPDataBegin[3];
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000148 const uint8_t* ptr = &_ptrRTPDataBegin[4];
149
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000150 uint32_t SSRC = ByteReader<uint32_t>::ReadBigEndian(ptr);
151 ptr += 4;
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000152
Yves Gerey665174f2018-06-19 15:03:05 +0200153 header->payloadType = PT;
154 header->ssrc = SSRC;
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000155 header->headerLength = 4 + (len << 2);
156
157 return true;
158}
159
Bjorn Tereliusb2bfba62018-03-05 20:52:04 +0100160bool RtpHeaderParser::Parse(
161 RTPHeader* header,
162 const RtpHeaderExtensionMap* ptrExtensionMap) const {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000163 const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin;
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000164 if (length < kRtpMinParseLength) {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000165 return false;
166 }
167
168 // Version
Yves Gerey665174f2018-06-19 15:03:05 +0200169 const uint8_t V = _ptrRTPDataBegin[0] >> 6;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000170 // Padding
Yves Gerey665174f2018-06-19 15:03:05 +0200171 const bool P = ((_ptrRTPDataBegin[0] & 0x20) == 0) ? false : true;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000172 // eXtension
Yves Gerey665174f2018-06-19 15:03:05 +0200173 const bool X = ((_ptrRTPDataBegin[0] & 0x10) == 0) ? false : true;
pbos@webrtc.org2f446732013-04-08 11:08:41 +0000174 const uint8_t CC = _ptrRTPDataBegin[0] & 0x0f;
Yves Gerey665174f2018-06-19 15:03:05 +0200175 const bool M = ((_ptrRTPDataBegin[1] & 0x80) == 0) ? false : true;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000176
pbos@webrtc.org2f446732013-04-08 11:08:41 +0000177 const uint8_t PT = _ptrRTPDataBegin[1] & 0x7f;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000178
Yves Gerey665174f2018-06-19 15:03:05 +0200179 const uint16_t sequenceNumber =
180 (_ptrRTPDataBegin[2] << 8) + _ptrRTPDataBegin[3];
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000181
pbos@webrtc.org2f446732013-04-08 11:08:41 +0000182 const uint8_t* ptr = &_ptrRTPDataBegin[4];
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000183
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000184 uint32_t RTPTimestamp = ByteReader<uint32_t>::ReadBigEndian(ptr);
185 ptr += 4;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000186
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000187 uint32_t SSRC = ByteReader<uint32_t>::ReadBigEndian(ptr);
188 ptr += 4;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000189
solenberg@webrtc.orga5fd2f12013-06-26 08:36:07 +0000190 if (V != kRtpExpectedVersion) {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000191 return false;
192 }
193
pkasting@chromium.org4591fbd2014-11-20 22:28:14 +0000194 const size_t CSRCocts = CC * 4;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000195
196 if ((ptr + CSRCocts) > _ptrRTPDataEnd) {
197 return false;
198 }
199
Yves Gerey665174f2018-06-19 15:03:05 +0200200 header->markerBit = M;
201 header->payloadType = PT;
danilchapf6975f42015-12-28 10:18:46 -0800202 header->sequenceNumber = sequenceNumber;
Yves Gerey665174f2018-06-19 15:03:05 +0200203 header->timestamp = RTPTimestamp;
204 header->ssrc = SSRC;
205 header->numCSRCs = CC;
Minyue Li1a800182018-09-12 12:52:48 +0200206 if (!P) {
207 header->paddingLength = 0;
208 }
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000209
pkasting@chromium.org4591fbd2014-11-20 22:28:14 +0000210 for (uint8_t i = 0; i < CC; ++i) {
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000211 uint32_t CSRC = ByteReader<uint32_t>::ReadBigEndian(ptr);
212 ptr += 4;
danilchapf6975f42015-12-28 10:18:46 -0800213 header->arrOfCSRCs[i] = CSRC;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000214 }
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000215
Yves Gerey665174f2018-06-19 15:03:05 +0200216 header->headerLength = 12 + CSRCocts;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000217
218 // If in effect, MAY be omitted for those packets for which the offset
219 // is zero.
danilchapf6975f42015-12-28 10:18:46 -0800220 header->extension.hasTransmissionTimeOffset = false;
221 header->extension.transmissionTimeOffset = 0;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000222
solenberg@webrtc.org7ebbea12013-05-16 11:10:31 +0000223 // May not be present in packet.
danilchapf6975f42015-12-28 10:18:46 -0800224 header->extension.hasAbsoluteSendTime = false;
225 header->extension.absoluteSendTime = 0;
solenberg@webrtc.org7ebbea12013-05-16 11:10:31 +0000226
wu@webrtc.orgebdb0e32014-03-06 23:49:08 +0000227 // May not be present in packet.
danilchapf6975f42015-12-28 10:18:46 -0800228 header->extension.hasAudioLevel = false;
229 header->extension.voiceActivity = false;
230 header->extension.audioLevel = 0;
wu@webrtc.orgebdb0e32014-03-06 23:49:08 +0000231
guoweis@webrtc.org45362892015-03-04 22:55:15 +0000232 // May not be present in packet.
danilchapf6975f42015-12-28 10:18:46 -0800233 header->extension.hasVideoRotation = false;
magjed71eb61c2016-09-08 03:24:58 -0700234 header->extension.videoRotation = kVideoRotation_0;
guoweis@webrtc.org45362892015-03-04 22:55:15 +0000235
isheriff6b4b5f32016-06-08 00:24:21 -0700236 // May not be present in packet.
237 header->extension.playout_delay.min_ms = -1;
238 header->extension.playout_delay.max_ms = -1;
239
ilnik00d802b2017-04-11 10:34:31 -0700240 // May not be present in packet.
241 header->extension.hasVideoContentType = false;
242 header->extension.videoContentType = VideoContentType::UNSPECIFIED;
243
ilnik04f4d122017-06-19 07:18:55 -0700244 header->extension.has_video_timing = false;
245 header->extension.video_timing = {0u, 0u, 0u, 0u, 0u, 0u, false};
246
Johnny Leee0c8b232018-09-11 16:50:49 -0400247 header->extension.has_frame_marking = false;
248 header->extension.frame_marking = {false, false, false, false, false,
249 kNoTemporalIdx, 0, 0};
250
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000251 if (X) {
252 /* RTP header extension, RFC 3550.
253 0 1 2 3
254 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
255 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
256 | defined by profile | length |
257 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
258 | header extension |
259 | .... |
260 */
261 const ptrdiff_t remain = _ptrRTPDataEnd - ptr;
262 if (remain < 4) {
263 return false;
niklase@google.com470e71d2011-07-07 08:21:25 +0000264 }
265
danilchapf6975f42015-12-28 10:18:46 -0800266 header->headerLength += 4;
niklase@google.com470e71d2011-07-07 08:21:25 +0000267
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000268 uint16_t definedByProfile = ByteReader<uint16_t>::ReadBigEndian(ptr);
269 ptr += 2;
niklase@google.com470e71d2011-07-07 08:21:25 +0000270
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000271 // in 32 bit words
272 size_t XLen = ByteReader<uint16_t>::ReadBigEndian(ptr);
273 ptr += 2;
274 XLen *= 4; // in bytes
niklase@google.com470e71d2011-07-07 08:21:25 +0000275
pkasting@chromium.org4591fbd2014-11-20 22:28:14 +0000276 if (static_cast<size_t>(remain) < (4 + XLen)) {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000277 return false;
niklase@google.com470e71d2011-07-07 08:21:25 +0000278 }
danilchap5c4f24a2017-01-23 11:10:20 -0800279 static constexpr uint16_t kRtpOneByteHeaderExtensionId = 0xBEDE;
pbos@webrtc.org3004c792013-05-07 12:36:21 +0000280 if (definedByProfile == kRtpOneByteHeaderExtensionId) {
pbos@webrtc.org2f446732013-04-08 11:08:41 +0000281 const uint8_t* ptrRTPDataExtensionEnd = ptr + XLen;
Yves Gerey665174f2018-06-19 15:03:05 +0200282 ParseOneByteExtensionHeader(header, ptrExtensionMap,
283 ptrRTPDataExtensionEnd, ptr);
niklase@google.com470e71d2011-07-07 08:21:25 +0000284 }
danilchapf6975f42015-12-28 10:18:46 -0800285 header->headerLength += XLen;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000286 }
Minyue Li1a800182018-09-12 12:52:48 +0200287 if (header->headerLength > static_cast<size_t>(length))
288 return false;
289
290 if (P) {
291 // Packet has padding.
292 if (header->headerLength != static_cast<size_t>(length)) {
293 // Packet is not header only. We can parse padding length now.
294 header->paddingLength = *(_ptrRTPDataEnd - 1);
295 } else {
296 RTC_LOG(LS_WARNING) << "Cannot parse padding length.";
297 // Packet is header only. We have no clue of the padding length.
298 return false;
299 }
300 }
301
danilchapf6975f42015-12-28 10:18:46 -0800302 if (header->headerLength + header->paddingLength >
303 static_cast<size_t>(length))
pbosbd2522a2015-07-01 05:35:53 -0700304 return false;
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000305 return true;
niklase@google.com470e71d2011-07-07 08:21:25 +0000306}
307
pbos@webrtc.org62bafae2014-07-08 12:10:51 +0000308void RtpHeaderParser::ParseOneByteExtensionHeader(
danilchapf6975f42015-12-28 10:18:46 -0800309 RTPHeader* header,
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000310 const RtpHeaderExtensionMap* ptrExtensionMap,
pbos@webrtc.org2f446732013-04-08 11:08:41 +0000311 const uint8_t* ptrRTPDataExtensionEnd,
312 const uint8_t* ptr) const {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000313 if (!ptrExtensionMap) {
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000314 return;
315 }
316
317 while (ptrRTPDataExtensionEnd - ptr > 0) {
318 // 0
319 // 0 1 2 3 4 5 6 7
320 // +-+-+-+-+-+-+-+-+
321 // | ID | len |
322 // +-+-+-+-+-+-+-+-+
323
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000324 // Note that 'len' is the header extension element length, which is the
325 // number of bytes - 1.
Stefan Holmer3842c5c2016-01-12 13:55:00 +0100326 const int id = (*ptr & 0xf0) >> 4;
327 const int len = (*ptr & 0x0f);
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000328 ptr++;
329
danilchapb7374db2016-11-24 09:06:05 -0800330 if (id == 0) {
331 // Padding byte, skip ignoring len.
332 continue;
333 }
334
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000335 if (id == 15) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100336 RTC_LOG(LS_VERBOSE)
andresp@webrtc.orgdc80bae2014-04-08 11:06:12 +0000337 << "RTP extension header 15 encountered. Terminate parsing.";
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000338 return;
339 }
340
Danil Chapovalov30a3a752016-06-16 15:57:15 +0200341 if (ptrRTPDataExtensionEnd - ptr < (len + 1)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100342 RTC_LOG(LS_WARNING) << "Incorrect one-byte extension len: " << (len + 1)
343 << ", bytes left in buffer: "
344 << (ptrRTPDataExtensionEnd - ptr);
Danil Chapovalov30a3a752016-06-16 15:57:15 +0200345 return;
346 }
347
danilchap14546692016-12-01 08:39:35 -0800348 RTPExtensionType type = ptrExtensionMap->GetType(id);
349 if (type == RtpHeaderExtensionMap::kInvalidType) {
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000350 // If we encounter an unknown extension, just skip over it.
Mirko Bonadei675513b2017-11-09 11:09:25 +0100351 RTC_LOG(LS_WARNING) << "Failed to find extension id: " << id;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000352 } else {
353 switch (type) {
354 case kRtpExtensionTransmissionTimeOffset: {
355 if (len != 2) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100356 RTC_LOG(LS_WARNING)
357 << "Incorrect transmission time offset len: " << len;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000358 return;
359 }
360 // 0 1 2 3
361 // 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
362 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
363 // | ID | len=2 | transmission offset |
364 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000365
danilchapf6975f42015-12-28 10:18:46 -0800366 header->extension.transmissionTimeOffset =
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000367 ByteReader<int32_t, 3>::ReadBigEndian(ptr);
danilchapf6975f42015-12-28 10:18:46 -0800368 header->extension.hasTransmissionTimeOffset = true;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000369 break;
370 }
371 case kRtpExtensionAudioLevel: {
372 if (len != 0) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100373 RTC_LOG(LS_WARNING) << "Incorrect audio level len: " << len;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000374 return;
375 }
sprang@webrtc.org30933902015-03-17 14:33:12 +0000376 // 0 1
377 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
378 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
379 // | ID | len=0 |V| level |
380 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000381 //
danilchapf6975f42015-12-28 10:18:46 -0800382 header->extension.audioLevel = ptr[0] & 0x7f;
383 header->extension.voiceActivity = (ptr[0] & 0x80) != 0;
384 header->extension.hasAudioLevel = true;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000385 break;
386 }
387 case kRtpExtensionAbsoluteSendTime: {
388 if (len != 2) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100389 RTC_LOG(LS_WARNING) << "Incorrect absolute send time len: " << len;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000390 return;
391 }
392 // 0 1 2 3
393 // 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
394 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
395 // | ID | len=2 | absolute send time |
396 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
397
danilchapf6975f42015-12-28 10:18:46 -0800398 header->extension.absoluteSendTime =
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000399 ByteReader<uint32_t, 3>::ReadBigEndian(ptr);
danilchapf6975f42015-12-28 10:18:46 -0800400 header->extension.hasAbsoluteSendTime = true;
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000401 break;
402 }
guoweis@webrtc.org45362892015-03-04 22:55:15 +0000403 case kRtpExtensionVideoRotation: {
404 if (len != 0) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100405 RTC_LOG(LS_WARNING)
guoweis@webrtc.org45362892015-03-04 22:55:15 +0000406 << "Incorrect coordination of video coordination len: " << len;
407 return;
408 }
sprang@webrtc.org779c3d12015-03-17 16:42:49 +0000409 // 0 1
410 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
411 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
412 // | ID | len=0 |0 0 0 0 C F R R|
413 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
danilchapf6975f42015-12-28 10:18:46 -0800414 header->extension.hasVideoRotation = true;
magjed71eb61c2016-09-08 03:24:58 -0700415 header->extension.videoRotation =
416 ConvertCVOByteToVideoRotation(ptr[0]);
guoweis@webrtc.org45362892015-03-04 22:55:15 +0000417 break;
418 }
sprang@webrtc.org30933902015-03-17 14:33:12 +0000419 case kRtpExtensionTransportSequenceNumber: {
420 if (len != 1) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100421 RTC_LOG(LS_WARNING)
422 << "Incorrect transport sequence number len: " << len;
sprang@webrtc.org30933902015-03-17 14:33:12 +0000423 return;
424 }
425 // 0 1 2
426 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
427 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
428 // | ID | L=1 |transport wide sequence number |
429 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
430
431 uint16_t sequence_number = ptr[0] << 8;
432 sequence_number += ptr[1];
danilchapf6975f42015-12-28 10:18:46 -0800433 header->extension.transportSequenceNumber = sequence_number;
434 header->extension.hasTransportSequenceNumber = true;
sprang@webrtc.org30933902015-03-17 14:33:12 +0000435 break;
436 }
isheriff6b4b5f32016-06-08 00:24:21 -0700437 case kRtpExtensionPlayoutDelay: {
438 if (len != 2) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100439 RTC_LOG(LS_WARNING) << "Incorrect playout delay len: " << len;
isheriff6b4b5f32016-06-08 00:24:21 -0700440 return;
441 }
442 // 0 1 2 3
443 // 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
444 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
445 // | ID | len=2 | MIN delay | MAX delay |
446 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
447
448 int min_playout_delay = (ptr[0] << 4) | ((ptr[1] >> 4) & 0xf);
449 int max_playout_delay = ((ptr[1] & 0xf) << 8) | ptr[2];
450 header->extension.playout_delay.min_ms =
danilchap5c4f24a2017-01-23 11:10:20 -0800451 min_playout_delay * PlayoutDelayLimits::kGranularityMs;
isheriff6b4b5f32016-06-08 00:24:21 -0700452 header->extension.playout_delay.max_ms =
danilchap5c4f24a2017-01-23 11:10:20 -0800453 max_playout_delay * PlayoutDelayLimits::kGranularityMs;
isheriff6b4b5f32016-06-08 00:24:21 -0700454 break;
455 }
ilnik00d802b2017-04-11 10:34:31 -0700456 case kRtpExtensionVideoContentType: {
457 if (len != 0) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100458 RTC_LOG(LS_WARNING) << "Incorrect video content type len: " << len;
ilnik00d802b2017-04-11 10:34:31 -0700459 return;
460 }
461 // 0 1
462 // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
463 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
464 // | ID | len=0 | Content type |
465 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
466
ilnik6d5b4d62017-08-30 03:32:14 -0700467 if (videocontenttypehelpers::IsValidContentType(ptr[0])) {
ilnik00d802b2017-04-11 10:34:31 -0700468 header->extension.hasVideoContentType = true;
469 header->extension.videoContentType =
470 static_cast<VideoContentType>(ptr[0]);
471 }
472 break;
473 }
ilnik04f4d122017-06-19 07:18:55 -0700474 case kRtpExtensionVideoTiming: {
475 if (len != VideoTimingExtension::kValueSizeBytes - 1) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100476 RTC_LOG(LS_WARNING) << "Incorrect video timing len: " << len;
ilnik04f4d122017-06-19 07:18:55 -0700477 return;
478 }
479 header->extension.has_video_timing = true;
480 VideoTimingExtension::Parse(rtc::MakeArrayView(ptr, len + 1),
481 &header->extension.video_timing);
482 break;
483 }
Johnny Leee0c8b232018-09-11 16:50:49 -0400484 case kRtpExtensionFrameMarking: {
485 if (!FrameMarkingExtension::Parse(rtc::MakeArrayView(ptr, len + 1),
486 &header->extension.frame_marking)) {
487 RTC_LOG(LS_WARNING) << "Incorrect frame marking len: " << len;
488 return;
489 }
490 header->extension.has_frame_marking = true;
491 break;
492 }
danilchapef8d7732017-04-19 02:59:48 -0700493 case kRtpExtensionRtpStreamId: {
494 header->extension.stream_id.Set(rtc::MakeArrayView(ptr, len + 1));
495 break;
496 }
497 case kRtpExtensionRepairedRtpStreamId: {
498 header->extension.repaired_stream_id.Set(
499 rtc::MakeArrayView(ptr, len + 1));
500 break;
501 }
Steve Antona3251dd2017-07-21 09:58:31 -0700502 case kRtpExtensionMid: {
503 header->extension.mid.Set(rtc::MakeArrayView(ptr, len + 1));
504 break;
505 }
Danil Chapovalov916ec7d2018-06-25 18:22:15 +0200506 case kRtpExtensionGenericFrameDescriptor:
507 RTC_LOG(WARNING)
508 << "RtpGenericFrameDescriptor unsupported by rtp header parser.";
509 break;
danilchap14546692016-12-01 08:39:35 -0800510 case kRtpExtensionNone:
511 case kRtpExtensionNumberOfExtensions: {
512 RTC_NOTREACHED() << "Invalid extension type: " << type;
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000513 return;
514 }
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000515 }
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000516 }
solenberg@webrtc.org440fa232014-03-25 19:57:07 +0000517 ptr += (len + 1);
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000518 }
asapersson@webrtc.org5249cc82011-12-16 14:31:37 +0000519}
520
pbos@webrtc.org62bafae2014-07-08 12:10:51 +0000521} // namespace RtpUtility
henrike@webrtc.orgd5657c22012-02-08 23:41:49 +0000522} // namespace webrtc