niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1 | /* |
pwestin@webrtc.org | f6bb77a | 2012-01-24 17:16:59 +0000 | [diff] [blame] | 2 | * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 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 | #include "rtp_utility.h" |
| 12 | |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 13 | #include <cassert> |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 14 | #include <cmath> // ceil |
| 15 | #include <cstring> // memcpy |
| 16 | |
| 17 | #if defined(_WIN32) |
| 18 | #include <Windows.h> // FILETIME |
| 19 | #include <WinSock.h> // timeval |
| 20 | #include <MMSystem.h> // timeGetTime |
| 21 | #elif ((defined WEBRTC_LINUX) || (defined WEBRTC_MAC)) |
| 22 | #include <sys/time.h> // gettimeofday |
| 23 | #include <time.h> |
| 24 | #endif |
| 25 | #if (defined(_DEBUG) && defined(_WIN32) && (_MSC_VER >= 1400)) |
| 26 | #include <stdio.h> |
| 27 | #endif |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 28 | |
pwestin@webrtc.org | 1853005 | 2012-07-03 10:41:54 +0000 | [diff] [blame] | 29 | #include "system_wrappers/interface/tick_util.h" |
| 30 | #include "system_wrappers/interface/trace.h" |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 31 | |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 32 | #if (defined(_DEBUG) && defined(_WIN32) && (_MSC_VER >= 1400)) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 33 | #define DEBUG_PRINT(...) \ |
| 34 | { \ |
| 35 | char msg[256]; \ |
| 36 | sprintf(msg, __VA_ARGS__); \ |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 37 | OutputDebugString(msg); \ |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 38 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 39 | #else |
| 40 | // special fix for visual 2003 |
| 41 | #define DEBUG_PRINT(exp) ((void)0) |
| 42 | #endif // defined(_DEBUG) && defined(_WIN32) |
| 43 | |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 44 | namespace webrtc { |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 45 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 46 | namespace ModuleRTPUtility { |
| 47 | |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 48 | /* |
| 49 | * Time routines. |
| 50 | */ |
| 51 | |
stefan@webrtc.org | 20ed36d | 2013-01-17 14:01:20 +0000 | [diff] [blame] | 52 | WebRtc_UWord32 GetCurrentRTP(Clock* clock, WebRtc_UWord32 freq) { |
henrike@webrtc.org | f5da4da | 2012-02-15 23:54:59 +0000 | [diff] [blame] | 53 | const bool use_global_clock = (clock == NULL); |
stefan@webrtc.org | 20ed36d | 2013-01-17 14:01:20 +0000 | [diff] [blame] | 54 | Clock* local_clock = clock; |
henrike@webrtc.org | f5da4da | 2012-02-15 23:54:59 +0000 | [diff] [blame] | 55 | if (use_global_clock) { |
stefan@webrtc.org | 20ed36d | 2013-01-17 14:01:20 +0000 | [diff] [blame] | 56 | local_clock = Clock::GetRealTimeClock(); |
henrike@webrtc.org | f5da4da | 2012-02-15 23:54:59 +0000 | [diff] [blame] | 57 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 58 | WebRtc_UWord32 secs = 0, frac = 0; |
stefan@webrtc.org | 20ed36d | 2013-01-17 14:01:20 +0000 | [diff] [blame] | 59 | local_clock->CurrentNtp(secs, frac); |
henrike@webrtc.org | f5da4da | 2012-02-15 23:54:59 +0000 | [diff] [blame] | 60 | if (use_global_clock) { |
| 61 | delete local_clock; |
| 62 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 63 | return ConvertNTPTimeToRTP(secs, frac, freq); |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | WebRtc_UWord32 ConvertNTPTimeToRTP(WebRtc_UWord32 NTPsec, |
| 67 | WebRtc_UWord32 NTPfrac, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 68 | WebRtc_UWord32 freq) { |
| 69 | float ftemp = (float)NTPfrac / (float)NTP_FRAC; |
| 70 | WebRtc_UWord32 tmp = (WebRtc_UWord32)(ftemp * freq); |
| 71 | return NTPsec * freq + tmp; |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | WebRtc_UWord32 ConvertNTPTimeToMS(WebRtc_UWord32 NTPsec, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 75 | WebRtc_UWord32 NTPfrac) { |
| 76 | int freq = 1000; |
| 77 | float ftemp = (float)NTPfrac / (float)NTP_FRAC; |
| 78 | WebRtc_UWord32 tmp = (WebRtc_UWord32)(ftemp * freq); |
| 79 | WebRtc_UWord32 MStime = NTPsec * freq + tmp; |
| 80 | return MStime; |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 81 | } |
| 82 | |
marpan@webrtc.org | 57353a3 | 2011-12-16 17:21:09 +0000 | [diff] [blame] | 83 | bool OldTimestamp(uint32_t newTimestamp, |
| 84 | uint32_t existingTimestamp, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 85 | bool* wrapped) { |
| 86 | bool tmpWrapped = |
| 87 | (newTimestamp < 0x0000ffff && existingTimestamp > 0xffff0000) || |
| 88 | (newTimestamp > 0xffff0000 && existingTimestamp < 0x0000ffff); |
| 89 | *wrapped = tmpWrapped; |
| 90 | if (existingTimestamp > newTimestamp && !tmpWrapped) { |
| 91 | return true; |
| 92 | } else if (existingTimestamp <= newTimestamp && !tmpWrapped) { |
| 93 | return false; |
| 94 | } else if (existingTimestamp < newTimestamp && tmpWrapped) { |
| 95 | return true; |
| 96 | } else { |
| 97 | return false; |
| 98 | } |
marpan@webrtc.org | 57353a3 | 2011-12-16 17:21:09 +0000 | [diff] [blame] | 99 | } |
| 100 | |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 101 | /* |
| 102 | * Misc utility routines |
| 103 | */ |
| 104 | |
phoglund@webrtc.org | 07bf43c | 2012-12-18 15:40:53 +0000 | [diff] [blame] | 105 | const WebRtc_UWord8* GetPayloadData(const WebRtcRTPHeader* rtp_header, |
| 106 | const WebRtc_UWord8* packet) { |
| 107 | return packet + rtp_header->header.headerLength; |
| 108 | } |
| 109 | |
| 110 | WebRtc_UWord16 GetPayloadDataLength(const WebRtcRTPHeader* rtp_header, |
| 111 | const WebRtc_UWord16 packet_length) { |
| 112 | WebRtc_UWord16 length = packet_length - rtp_header->header.paddingLength - |
| 113 | rtp_header->header.headerLength; |
| 114 | return static_cast<WebRtc_UWord16>(length); |
| 115 | } |
| 116 | |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 117 | #if defined(_WIN32) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 118 | bool StringCompare(const char* str1, const char* str2, |
| 119 | const WebRtc_UWord32 length) { |
| 120 | return (_strnicmp(str1, str2, length) == 0) ? true : false; |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 121 | } |
| 122 | #elif defined(WEBRTC_LINUX) || defined(WEBRTC_MAC) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 123 | bool StringCompare(const char* str1, const char* str2, |
| 124 | const WebRtc_UWord32 length) { |
| 125 | return (strncasecmp(str1, str2, length) == 0) ? true : false; |
pwestin@webrtc.org | 0644b1d | 2011-12-01 15:42:31 +0000 | [diff] [blame] | 126 | } |
| 127 | #endif |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 128 | |
| 129 | #if !defined(WEBRTC_LITTLE_ENDIAN) && !defined(WEBRTC_BIG_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 130 | #error Either WEBRTC_LITTLE_ENDIAN or WEBRTC_BIG_ENDIAN must be defined |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 131 | #endif |
| 132 | |
| 133 | /* for RTP/RTCP |
| 134 | All integer fields are carried in network byte order, that is, most |
| 135 | significant byte (octet) first. AKA big-endian. |
| 136 | */ |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 137 | void AssignUWord32ToBuffer(WebRtc_UWord8* dataBuffer, WebRtc_UWord32 value) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 138 | #if defined(WEBRTC_LITTLE_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 139 | dataBuffer[0] = static_cast<WebRtc_UWord8>(value >> 24); |
| 140 | dataBuffer[1] = static_cast<WebRtc_UWord8>(value >> 16); |
| 141 | dataBuffer[2] = static_cast<WebRtc_UWord8>(value >> 8); |
| 142 | dataBuffer[3] = static_cast<WebRtc_UWord8>(value); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 143 | #else |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 144 | WebRtc_UWord32* ptr = reinterpret_cast<WebRtc_UWord32*>(dataBuffer); |
| 145 | ptr[0] = value; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 146 | #endif |
| 147 | } |
| 148 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 149 | void AssignUWord24ToBuffer(WebRtc_UWord8* dataBuffer, WebRtc_UWord32 value) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 150 | #if defined(WEBRTC_LITTLE_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 151 | dataBuffer[0] = static_cast<WebRtc_UWord8>(value >> 16); |
| 152 | dataBuffer[1] = static_cast<WebRtc_UWord8>(value >> 8); |
| 153 | dataBuffer[2] = static_cast<WebRtc_UWord8>(value); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 154 | #else |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 155 | dataBuffer[0] = static_cast<WebRtc_UWord8>(value); |
| 156 | dataBuffer[1] = static_cast<WebRtc_UWord8>(value >> 8); |
| 157 | dataBuffer[2] = static_cast<WebRtc_UWord8>(value >> 16); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 158 | #endif |
| 159 | } |
| 160 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 161 | void AssignUWord16ToBuffer(WebRtc_UWord8* dataBuffer, WebRtc_UWord16 value) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 162 | #if defined(WEBRTC_LITTLE_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 163 | dataBuffer[0] = static_cast<WebRtc_UWord8>(value >> 8); |
| 164 | dataBuffer[1] = static_cast<WebRtc_UWord8>(value); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 165 | #else |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 166 | WebRtc_UWord16* ptr = reinterpret_cast<WebRtc_UWord16*>(dataBuffer); |
| 167 | ptr[0] = value; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 168 | #endif |
| 169 | } |
| 170 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 171 | WebRtc_UWord16 BufferToUWord16(const WebRtc_UWord8* dataBuffer) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 172 | #if defined(WEBRTC_LITTLE_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 173 | return (dataBuffer[0] << 8) + dataBuffer[1]; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 174 | #else |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 175 | return *reinterpret_cast<const WebRtc_UWord16*>(dataBuffer); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 176 | #endif |
| 177 | } |
| 178 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 179 | WebRtc_UWord32 BufferToUWord24(const WebRtc_UWord8* dataBuffer) { |
| 180 | return (dataBuffer[0] << 16) + (dataBuffer[1] << 8) + dataBuffer[2]; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 181 | } |
| 182 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 183 | WebRtc_UWord32 BufferToUWord32(const WebRtc_UWord8* dataBuffer) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 184 | #if defined(WEBRTC_LITTLE_ENDIAN) |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 185 | return (dataBuffer[0] << 24) + (dataBuffer[1] << 16) + (dataBuffer[2] << 8) + |
| 186 | dataBuffer[3]; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 187 | #else |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 188 | return *reinterpret_cast<const WebRtc_UWord32*>(dataBuffer); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 189 | #endif |
| 190 | } |
| 191 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 192 | WebRtc_UWord32 pow2(WebRtc_UWord8 exp) { |
| 193 | return 1 << exp; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 194 | } |
| 195 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 196 | void RTPPayload::SetType(RtpVideoCodecTypes videoType) { |
| 197 | type = videoType; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 198 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 199 | switch (type) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 200 | case kRtpNoVideo: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 201 | break; |
| 202 | case kRtpVp8Video: { |
| 203 | info.VP8.nonReferenceFrame = false; |
| 204 | info.VP8.beginningOfPartition = false; |
| 205 | info.VP8.partitionID = 0; |
| 206 | info.VP8.hasPictureID = false; |
| 207 | info.VP8.hasTl0PicIdx = false; |
| 208 | info.VP8.hasTID = false; |
| 209 | info.VP8.hasKeyIdx = false; |
| 210 | info.VP8.pictureID = -1; |
| 211 | info.VP8.tl0PicIdx = -1; |
| 212 | info.VP8.tID = -1; |
| 213 | info.VP8.layerSync = false; |
| 214 | info.VP8.frameWidth = 0; |
| 215 | info.VP8.frameHeight = 0; |
| 216 | break; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 217 | } |
| 218 | default: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 219 | break; |
| 220 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 221 | } |
| 222 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 223 | RTPHeaderParser::RTPHeaderParser(const WebRtc_UWord8* rtpData, |
| 224 | const WebRtc_UWord32 rtpDataLength) |
| 225 | : _ptrRTPDataBegin(rtpData), |
| 226 | _ptrRTPDataEnd(rtpData ? (rtpData + rtpDataLength) : NULL) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 227 | } |
| 228 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 229 | RTPHeaderParser::~RTPHeaderParser() { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 230 | } |
| 231 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 232 | bool RTPHeaderParser::RTCP() const { |
| 233 | // 72 to 76 is reserved for RTP |
| 234 | // 77 to 79 is not reserver but they are not assigned we will block them |
| 235 | // for RTCP 200 SR == marker bit + 72 |
| 236 | // for RTCP 204 APP == marker bit + 76 |
| 237 | /* |
| 238 | * RTCP |
| 239 | * |
| 240 | * FIR full INTRA-frame request 192 [RFC2032] supported |
| 241 | * NACK negative acknowledgement 193 [RFC2032] |
| 242 | * IJ Extended inter-arrival jitter report 195 [RFC-ietf-avt-rtp-toff |
| 243 | * set-07.txt] http://tools.ietf.org/html/draft-ietf-avt-rtp-toffset-07 |
| 244 | * SR sender report 200 [RFC3551] supported |
| 245 | * RR receiver report 201 [RFC3551] supported |
| 246 | * SDES source description 202 [RFC3551] supported |
| 247 | * BYE goodbye 203 [RFC3551] supported |
| 248 | * APP application-defined 204 [RFC3551] ignored |
| 249 | * RTPFB Transport layer FB message 205 [RFC4585] supported |
| 250 | * PSFB Payload-specific FB message 206 [RFC4585] supported |
| 251 | * XR extended report 207 [RFC3611] supported |
| 252 | */ |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 253 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 254 | /* 205 RFC 5104 |
| 255 | * FMT 1 NACK supported |
| 256 | * FMT 2 reserved |
| 257 | * FMT 3 TMMBR supported |
| 258 | * FMT 4 TMMBN supported |
| 259 | */ |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 260 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 261 | /* 206 RFC 5104 |
| 262 | * FMT 1: Picture Loss Indication (PLI) supported |
| 263 | * FMT 2: Slice Lost Indication (SLI) |
| 264 | * FMT 3: Reference Picture Selection Indication (RPSI) |
| 265 | * FMT 4: Full Intra Request (FIR) Command supported |
| 266 | * FMT 5: Temporal-Spatial Trade-off Request (TSTR) |
| 267 | * FMT 6: Temporal-Spatial Trade-off Notification (TSTN) |
| 268 | * FMT 7: Video Back Channel Message (VBCM) |
| 269 | * FMT 15: Application layer FB message |
| 270 | */ |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 271 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 272 | const WebRtc_UWord8 payloadType = _ptrRTPDataBegin[1]; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 273 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 274 | bool RTCP = false; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 275 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 276 | // check if this is a RTCP packet |
| 277 | switch (payloadType) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 278 | case 192: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 279 | RTCP = true; |
| 280 | break; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 281 | case 193: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 282 | // not supported |
| 283 | // pass through and check for a potential RTP packet |
| 284 | break; |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 285 | case 195: |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 286 | case 200: |
| 287 | case 201: |
| 288 | case 202: |
| 289 | case 203: |
| 290 | case 204: |
| 291 | case 205: |
| 292 | case 206: |
| 293 | case 207: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 294 | RTCP = true; |
| 295 | break; |
| 296 | } |
| 297 | return RTCP; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 298 | } |
| 299 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 300 | bool RTPHeaderParser::Parse(WebRtcRTPHeader& parsedPacket, |
| 301 | RtpHeaderExtensionMap* ptrExtensionMap) const { |
| 302 | const ptrdiff_t length = _ptrRTPDataEnd - _ptrRTPDataBegin; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 303 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 304 | if (length < 12) { |
| 305 | return false; |
| 306 | } |
| 307 | |
| 308 | // Version |
| 309 | const WebRtc_UWord8 V = _ptrRTPDataBegin[0] >> 6; |
| 310 | // Padding |
| 311 | const bool P = ((_ptrRTPDataBegin[0] & 0x20) == 0) ? false : true; |
| 312 | // eXtension |
| 313 | const bool X = ((_ptrRTPDataBegin[0] & 0x10) == 0) ? false : true; |
| 314 | const WebRtc_UWord8 CC = _ptrRTPDataBegin[0] & 0x0f; |
| 315 | const bool M = ((_ptrRTPDataBegin[1] & 0x80) == 0) ? false : true; |
| 316 | |
| 317 | const WebRtc_UWord8 PT = _ptrRTPDataBegin[1] & 0x7f; |
| 318 | |
| 319 | const WebRtc_UWord16 sequenceNumber = (_ptrRTPDataBegin[2] << 8) + |
| 320 | _ptrRTPDataBegin[3]; |
| 321 | |
| 322 | const WebRtc_UWord8* ptr = &_ptrRTPDataBegin[4]; |
| 323 | |
| 324 | WebRtc_UWord32 RTPTimestamp = *ptr++ << 24; |
| 325 | RTPTimestamp += *ptr++ << 16; |
| 326 | RTPTimestamp += *ptr++ << 8; |
| 327 | RTPTimestamp += *ptr++; |
| 328 | |
| 329 | WebRtc_UWord32 SSRC = *ptr++ << 24; |
| 330 | SSRC += *ptr++ << 16; |
| 331 | SSRC += *ptr++ << 8; |
| 332 | SSRC += *ptr++; |
| 333 | |
| 334 | if (V != 2) { |
| 335 | return false; |
| 336 | } |
| 337 | |
| 338 | const WebRtc_UWord8 CSRCocts = CC * 4; |
| 339 | |
| 340 | if ((ptr + CSRCocts) > _ptrRTPDataEnd) { |
| 341 | return false; |
| 342 | } |
| 343 | |
| 344 | parsedPacket.header.markerBit = M; |
| 345 | parsedPacket.header.payloadType = PT; |
| 346 | parsedPacket.header.sequenceNumber = sequenceNumber; |
| 347 | parsedPacket.header.timestamp = RTPTimestamp; |
| 348 | parsedPacket.header.ssrc = SSRC; |
| 349 | parsedPacket.header.numCSRCs = CC; |
| 350 | parsedPacket.header.paddingLength = P ? *(_ptrRTPDataEnd - 1) : 0; |
| 351 | |
| 352 | for (unsigned int i = 0; i < CC; ++i) { |
| 353 | WebRtc_UWord32 CSRC = *ptr++ << 24; |
| 354 | CSRC += *ptr++ << 16; |
| 355 | CSRC += *ptr++ << 8; |
| 356 | CSRC += *ptr++; |
| 357 | parsedPacket.header.arrOfCSRCs[i] = CSRC; |
| 358 | } |
| 359 | parsedPacket.type.Audio.numEnergy = parsedPacket.header.numCSRCs; |
| 360 | |
| 361 | parsedPacket.header.headerLength = 12 + CSRCocts; |
| 362 | |
| 363 | // If in effect, MAY be omitted for those packets for which the offset |
| 364 | // is zero. |
| 365 | parsedPacket.extension.transmissionTimeOffset = 0; |
| 366 | |
| 367 | if (X) { |
| 368 | /* RTP header extension, RFC 3550. |
| 369 | 0 1 2 3 |
| 370 | 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 |
| 371 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 372 | | defined by profile | length | |
| 373 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 374 | | header extension | |
| 375 | | .... | |
| 376 | */ |
| 377 | const ptrdiff_t remain = _ptrRTPDataEnd - ptr; |
| 378 | if (remain < 4) { |
| 379 | return false; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 380 | } |
| 381 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 382 | parsedPacket.header.headerLength += 4; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 383 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 384 | WebRtc_UWord16 definedByProfile = *ptr++ << 8; |
| 385 | definedByProfile += *ptr++; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 386 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 387 | WebRtc_UWord16 XLen = *ptr++ << 8; |
| 388 | XLen += *ptr++; // in 32 bit words |
| 389 | XLen *= 4; // in octs |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 390 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 391 | if (remain < (4 + XLen)) { |
| 392 | return false; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 393 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 394 | if (definedByProfile == RTP_ONE_BYTE_HEADER_EXTENSION) { |
| 395 | const WebRtc_UWord8* ptrRTPDataExtensionEnd = ptr + XLen; |
| 396 | ParseOneByteExtensionHeader(parsedPacket, |
| 397 | ptrExtensionMap, |
| 398 | ptrRTPDataExtensionEnd, |
| 399 | ptr); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 400 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 401 | parsedPacket.header.headerLength += XLen; |
| 402 | } |
| 403 | return true; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 404 | } |
| 405 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 406 | void RTPHeaderParser::ParseOneByteExtensionHeader( |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 407 | WebRtcRTPHeader& parsedPacket, |
| 408 | const RtpHeaderExtensionMap* ptrExtensionMap, |
| 409 | const WebRtc_UWord8* ptrRTPDataExtensionEnd, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 410 | const WebRtc_UWord8* ptr) const { |
| 411 | if (!ptrExtensionMap) { |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 412 | return; |
| 413 | } |
| 414 | |
| 415 | while (ptrRTPDataExtensionEnd - ptr > 0) { |
| 416 | // 0 |
| 417 | // 0 1 2 3 4 5 6 7 |
| 418 | // +-+-+-+-+-+-+-+-+ |
| 419 | // | ID | len | |
| 420 | // +-+-+-+-+-+-+-+-+ |
| 421 | |
| 422 | const WebRtc_UWord8 id = (*ptr & 0xf0) >> 4; |
| 423 | const WebRtc_UWord8 len = (*ptr & 0x0f); |
| 424 | ptr++; |
| 425 | |
| 426 | if (id == 15) { |
| 427 | WEBRTC_TRACE(kTraceWarning, kTraceRtpRtcp, -1, |
| 428 | "Ext id: 15 encountered, parsing terminated."); |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 429 | return; |
| 430 | } |
| 431 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 432 | RTPExtensionType type; |
| 433 | if (ptrExtensionMap->GetType(id, &type) != 0) { |
| 434 | WEBRTC_TRACE(kTraceStream, kTraceRtpRtcp, -1, |
| 435 | "Failed to find extension id: %d", id); |
| 436 | return; |
| 437 | } |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 438 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 439 | switch (type) { |
| 440 | case kRtpExtensionTransmissionTimeOffset: { |
| 441 | if (len != 2) { |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 442 | WEBRTC_TRACE(kTraceWarning, kTraceRtpRtcp, -1, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 443 | "Incorrect transmission time offset len: %d", len); |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 444 | return; |
| 445 | } |
| 446 | // 0 1 2 3 |
| 447 | // 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 |
| 448 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 449 | // | ID | len=2 | transmission offset | |
| 450 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 451 | |
| 452 | WebRtc_Word32 transmissionTimeOffset = *ptr++ << 16; |
| 453 | transmissionTimeOffset += *ptr++ << 8; |
| 454 | transmissionTimeOffset += *ptr++; |
| 455 | parsedPacket.extension.transmissionTimeOffset = transmissionTimeOffset; |
asapersson@webrtc.org | d2e6779 | 2012-06-28 07:53:15 +0000 | [diff] [blame] | 456 | if (transmissionTimeOffset & 0x800000) { |
| 457 | // Negative offset, correct sign for Word24 to Word32. |
| 458 | parsedPacket.extension.transmissionTimeOffset |= 0xFF000000; |
| 459 | } |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 460 | break; |
| 461 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 462 | case kRtpExtensionAudioLevel: { |
| 463 | // --- Only used for debugging --- |
| 464 | // 0 1 2 3 |
| 465 | // 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 |
| 466 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 467 | // | ID | len=0 |V| level | 0x00 | 0x00 | |
| 468 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 469 | // |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 470 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 471 | // Parse out the fields but only use it for debugging for now. |
| 472 | // const WebRtc_UWord8 V = (*ptr & 0x80) >> 7; |
| 473 | // const WebRtc_UWord8 level = (*ptr & 0x7f); |
| 474 | // DEBUG_PRINT("RTP_AUDIO_LEVEL_UNIQUE_ID: ID=%u, len=%u, V=%u, |
| 475 | // level=%u", ID, len, V, level); |
pwestin@webrtc.org | 6c1d415 | 2012-01-04 17:04:51 +0000 | [diff] [blame] | 476 | break; |
| 477 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 478 | default: { |
mflodman@webrtc.org | ba853c9 | 2012-08-10 14:30:53 +0000 | [diff] [blame] | 479 | WEBRTC_TRACE(kTraceStream, kTraceRtpRtcp, -1, |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 480 | "Extension type not implemented."); |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 481 | return; |
| 482 | } |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 483 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 484 | WebRtc_UWord8 num_bytes = ParsePaddingBytes(ptrRTPDataExtensionEnd, ptr); |
| 485 | ptr += num_bytes; |
| 486 | } |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 487 | } |
| 488 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 489 | WebRtc_UWord8 RTPHeaderParser::ParsePaddingBytes( |
| 490 | const WebRtc_UWord8* ptrRTPDataExtensionEnd, |
| 491 | const WebRtc_UWord8* ptr) const { |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 492 | |
| 493 | WebRtc_UWord8 num_zero_bytes = 0; |
| 494 | while (ptrRTPDataExtensionEnd - ptr > 0) { |
| 495 | if (*ptr != 0) { |
| 496 | return num_zero_bytes; |
| 497 | } |
| 498 | ptr++; |
| 499 | num_zero_bytes++; |
| 500 | } |
| 501 | return num_zero_bytes; |
| 502 | } |
| 503 | |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 504 | // RTP payload parser |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 505 | RTPPayloadParser::RTPPayloadParser(const RtpVideoCodecTypes videoType, |
| 506 | const WebRtc_UWord8* payloadData, |
| 507 | WebRtc_UWord16 payloadDataLength, |
| 508 | WebRtc_Word32 id) |
| 509 | : |
| 510 | _id(id), |
| 511 | _dataPtr(payloadData), |
| 512 | _dataLength(payloadDataLength), |
| 513 | _videoType(videoType) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 514 | } |
| 515 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 516 | RTPPayloadParser::~RTPPayloadParser() { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 517 | } |
| 518 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 519 | bool RTPPayloadParser::Parse(RTPPayload& parsedPacket) const { |
| 520 | parsedPacket.SetType(_videoType); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 521 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 522 | switch (_videoType) { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 523 | case kRtpNoVideo: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 524 | return ParseGeneric(parsedPacket); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 525 | case kRtpVp8Video: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 526 | return ParseVP8(parsedPacket); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 527 | default: |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 528 | return false; |
| 529 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 530 | } |
| 531 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 532 | bool RTPPayloadParser::ParseGeneric(RTPPayload& /*parsedPacket*/) const { |
| 533 | return false; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 534 | } |
| 535 | |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 536 | // |
| 537 | // VP8 format: |
| 538 | // |
| 539 | // Payload descriptor |
henrik.lundin@webrtc.org | 6f2c016 | 2011-11-24 12:52:40 +0000 | [diff] [blame] | 540 | // 0 1 2 3 4 5 6 7 |
| 541 | // +-+-+-+-+-+-+-+-+ |
| 542 | // |X|R|N|S|PartID | (REQUIRED) |
| 543 | // +-+-+-+-+-+-+-+-+ |
| 544 | // X: |I|L|T|K| RSV | (OPTIONAL) |
| 545 | // +-+-+-+-+-+-+-+-+ |
| 546 | // I: | PictureID | (OPTIONAL) |
| 547 | // +-+-+-+-+-+-+-+-+ |
| 548 | // L: | TL0PICIDX | (OPTIONAL) |
| 549 | // +-+-+-+-+-+-+-+-+ |
henrik.lundin@webrtc.org | eda86dc | 2011-12-13 14:11:06 +0000 | [diff] [blame] | 550 | // T/K: |TID:Y| KEYIDX | (OPTIONAL) |
henrik.lundin@webrtc.org | 6f2c016 | 2011-11-24 12:52:40 +0000 | [diff] [blame] | 551 | // +-+-+-+-+-+-+-+-+ |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 552 | // |
| 553 | // Payload header (considered part of the actual payload, sent to decoder) |
henrik.lundin@webrtc.org | 6f2c016 | 2011-11-24 12:52:40 +0000 | [diff] [blame] | 554 | // 0 1 2 3 4 5 6 7 |
| 555 | // +-+-+-+-+-+-+-+-+ |
| 556 | // |Size0|H| VER |P| |
| 557 | // +-+-+-+-+-+-+-+-+ |
| 558 | // | ... | |
| 559 | // + + |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 560 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 561 | bool RTPPayloadParser::ParseVP8(RTPPayload& parsedPacket) const { |
| 562 | RTPPayloadVP8* vp8 = &parsedPacket.info.VP8; |
| 563 | const WebRtc_UWord8* dataPtr = _dataPtr; |
| 564 | int dataLength = _dataLength; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 565 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 566 | // Parse mandatory first byte of payload descriptor |
| 567 | bool extension = (*dataPtr & 0x80) ? true : false; // X bit |
| 568 | vp8->nonReferenceFrame = (*dataPtr & 0x20) ? true : false; // N bit |
| 569 | vp8->beginningOfPartition = (*dataPtr & 0x10) ? true : false; // S bit |
| 570 | vp8->partitionID = (*dataPtr & 0x0F); // PartID field |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 571 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 572 | if (vp8->partitionID > 8) { |
| 573 | // Weak check for corrupt data: PartID MUST NOT be larger than 8. |
| 574 | return false; |
| 575 | } |
andrew@webrtc.org | 7fe219f | 2012-02-01 02:40:37 +0000 | [diff] [blame] | 576 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 577 | // Advance dataPtr and decrease remaining payload size |
| 578 | dataPtr++; |
| 579 | dataLength--; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 580 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 581 | if (extension) { |
| 582 | const int parsedBytes = ParseVP8Extension(vp8, dataPtr, dataLength); |
| 583 | if (parsedBytes < 0) return false; |
| 584 | dataPtr += parsedBytes; |
| 585 | dataLength -= parsedBytes; |
| 586 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 587 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 588 | if (dataLength <= 0) { |
| 589 | WEBRTC_TRACE(kTraceError, kTraceRtpRtcp, _id, |
| 590 | "Error parsing VP8 payload descriptor; payload too short"); |
| 591 | return false; |
| 592 | } |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 593 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 594 | // Read P bit from payload header (only at beginning of first partition) |
| 595 | if (dataLength > 0 && vp8->beginningOfPartition && vp8->partitionID == 0) { |
| 596 | parsedPacket.frameType = (*dataPtr & 0x01) ? kPFrame : kIFrame; |
| 597 | } else { |
| 598 | parsedPacket.frameType = kPFrame; |
| 599 | } |
| 600 | if (0 != ParseVP8FrameSize(parsedPacket, dataPtr, dataLength)) { |
| 601 | return false; |
| 602 | } |
| 603 | parsedPacket.info.VP8.data = dataPtr; |
| 604 | parsedPacket.info.VP8.dataLength = dataLength; |
| 605 | return true; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 606 | } |
| 607 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 608 | int RTPPayloadParser::ParseVP8FrameSize(RTPPayload& parsedPacket, |
| 609 | const WebRtc_UWord8* dataPtr, |
| 610 | int dataLength) const { |
| 611 | if (parsedPacket.frameType != kIFrame) { |
| 612 | // Included in payload header for I-frames. |
pwestin@webrtc.org | 075e91f | 2011-11-02 23:14:58 +0000 | [diff] [blame] | 613 | return 0; |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 614 | } |
| 615 | if (dataLength < 10) { |
| 616 | // For an I-frame we should always have the uncompressed VP8 header |
| 617 | // in the beginning of the partition. |
| 618 | return -1; |
| 619 | } |
| 620 | RTPPayloadVP8* vp8 = &parsedPacket.info.VP8; |
| 621 | vp8->frameWidth = ((dataPtr[7] << 8) + dataPtr[6]) & 0x3FFF; |
| 622 | vp8->frameHeight = ((dataPtr[9] << 8) + dataPtr[8]) & 0x3FFF; |
| 623 | return 0; |
pwestin@webrtc.org | 075e91f | 2011-11-02 23:14:58 +0000 | [diff] [blame] | 624 | } |
| 625 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 626 | int RTPPayloadParser::ParseVP8Extension(RTPPayloadVP8* vp8, |
| 627 | const WebRtc_UWord8* dataPtr, |
| 628 | int dataLength) const { |
| 629 | int parsedBytes = 0; |
| 630 | if (dataLength <= 0) return -1; |
| 631 | // Optional X field is present |
| 632 | vp8->hasPictureID = (*dataPtr & 0x80) ? true : false; // I bit |
| 633 | vp8->hasTl0PicIdx = (*dataPtr & 0x40) ? true : false; // L bit |
| 634 | vp8->hasTID = (*dataPtr & 0x20) ? true : false; // T bit |
| 635 | vp8->hasKeyIdx = (*dataPtr & 0x10) ? true : false; // K bit |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 636 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 637 | // Advance dataPtr and decrease remaining payload size |
| 638 | dataPtr++; |
| 639 | parsedBytes++; |
| 640 | dataLength--; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 641 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 642 | if (vp8->hasPictureID) { |
| 643 | if (ParseVP8PictureID(vp8, &dataPtr, &dataLength, &parsedBytes) != 0) { |
| 644 | return -1; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 645 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 646 | } |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 647 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 648 | if (vp8->hasTl0PicIdx) { |
| 649 | if (ParseVP8Tl0PicIdx(vp8, &dataPtr, &dataLength, &parsedBytes) != 0) { |
| 650 | return -1; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 651 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 652 | } |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 653 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 654 | if (vp8->hasTID || vp8->hasKeyIdx) { |
| 655 | if (ParseVP8TIDAndKeyIdx(vp8, &dataPtr, &dataLength, &parsedBytes) != 0) { |
| 656 | return -1; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 657 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 658 | } |
| 659 | return parsedBytes; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 660 | } |
| 661 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 662 | int RTPPayloadParser::ParseVP8PictureID(RTPPayloadVP8* vp8, |
| 663 | const WebRtc_UWord8** dataPtr, |
| 664 | int* dataLength, |
| 665 | int* parsedBytes) const { |
| 666 | if (*dataLength <= 0) return -1; |
| 667 | vp8->pictureID = (**dataPtr & 0x7F); |
| 668 | if (**dataPtr & 0x80) { |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 669 | (*dataPtr)++; |
| 670 | (*parsedBytes)++; |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 671 | if (--(*dataLength) <= 0) return -1; |
| 672 | // PictureID is 15 bits |
| 673 | vp8->pictureID = (vp8->pictureID << 8) +** dataPtr; |
| 674 | } |
| 675 | (*dataPtr)++; |
| 676 | (*parsedBytes)++; |
| 677 | (*dataLength)--; |
| 678 | return 0; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 679 | } |
| 680 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 681 | int RTPPayloadParser::ParseVP8Tl0PicIdx(RTPPayloadVP8* vp8, |
| 682 | const WebRtc_UWord8** dataPtr, |
| 683 | int* dataLength, |
| 684 | int* parsedBytes) const { |
| 685 | if (*dataLength <= 0) return -1; |
| 686 | vp8->tl0PicIdx = **dataPtr; |
| 687 | (*dataPtr)++; |
| 688 | (*parsedBytes)++; |
| 689 | (*dataLength)--; |
| 690 | return 0; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 691 | } |
| 692 | |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 693 | int RTPPayloadParser::ParseVP8TIDAndKeyIdx(RTPPayloadVP8* vp8, |
| 694 | const WebRtc_UWord8** dataPtr, |
| 695 | int* dataLength, |
| 696 | int* parsedBytes) const { |
| 697 | if (*dataLength <= 0) return -1; |
| 698 | if (vp8->hasTID) { |
| 699 | vp8->tID = ((**dataPtr >> 6) & 0x03); |
| 700 | vp8->layerSync = (**dataPtr & 0x20) ? true : false; // Y bit |
| 701 | } |
| 702 | if (vp8->hasKeyIdx) { |
| 703 | vp8->keyIdx = (**dataPtr & 0x1F); |
| 704 | } |
| 705 | (*dataPtr)++; |
| 706 | (*parsedBytes)++; |
| 707 | (*dataLength)--; |
| 708 | return 0; |
henrik.lundin@webrtc.org | 8571af7 | 2011-08-29 15:37:12 +0000 | [diff] [blame] | 709 | } |
henrike@webrtc.org | d5657c2 | 2012-02-08 23:41:49 +0000 | [diff] [blame] | 710 | |
| 711 | } // namespace ModuleRTPUtility |
| 712 | |
| 713 | } // namespace webrtc |