The Tor Browser / file comparison
comparison: media/libmkv/WebMElement.c
media/libmkv/WebMElement.c
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:872e14e342d0 |
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| 1 // Copyright (c) 2010 The WebM project authors. All Rights Reserved. | |
| 2 // | |
| 3 // Use of this source code is governed by a BSD-style license | |
| 4 // that can be found in the LICENSE file in the root of the source | |
| 5 // tree. An additional intellectual property rights grant can be found | |
| 6 // in the file PATENTS. All contributing project authors may | |
| 7 // be found in the AUTHORS file in the root of the source tree. | |
| 8 | |
| 9 #include "EbmlIDs.h" | |
| 10 #include "WebMElement.h" | |
| 11 #include <stdio.h> | |
| 12 #include <stdint.h> | |
| 13 #include <stdlib.h> | |
| 14 #include <time.h> | |
| 15 | |
| 16 #define kVorbisPrivateMaxSize 4000 | |
| 17 #define UInt64 uint64_t | |
| 18 | |
| 19 void writeHeader(EbmlGlobal *glob) { | |
| 20 EbmlLoc start; | |
| 21 Ebml_StartSubElement(glob, &start, EBML); | |
| 22 Ebml_SerializeUnsigned(glob, EBMLVersion, 1); | |
| 23 Ebml_SerializeUnsigned(glob, EBMLReadVersion, 1); // EBML Read Version | |
| 24 Ebml_SerializeUnsigned(glob, EBMLMaxIDLength, 4); // EBML Max ID Length | |
| 25 Ebml_SerializeUnsigned(glob, EBMLMaxSizeLength, 8); // EBML Max Size Length | |
| 26 Ebml_SerializeString(glob, DocType, "webm"); // Doc Type | |
| 27 Ebml_SerializeUnsigned(glob, DocTypeVersion, 2); // Doc Type Version | |
| 28 Ebml_SerializeUnsigned(glob, DocTypeReadVersion, 2); // Doc Type Read Version | |
| 29 Ebml_EndSubElement(glob, &start); | |
| 30 } | |
| 31 | |
| 32 void writeSimpleBlock(EbmlGlobal *glob, unsigned char trackNumber, short timeCode, | |
| 33 int isKeyframe, unsigned char lacingFlag, int discardable, | |
| 34 unsigned char *data, unsigned long dataLength) { | |
| 35 unsigned long blockLength = 4 + dataLength; | |
| 36 unsigned char flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable; | |
| 37 Ebml_WriteID(glob, SimpleBlock); | |
| 38 blockLength |= 0x10000000; // TODO check length < 0x0FFFFFFFF | |
| 39 Ebml_Serialize(glob, &blockLength, sizeof(blockLength), 4); | |
| 40 trackNumber |= 0x80; // TODO check track nubmer < 128 | |
| 41 Ebml_Write(glob, &trackNumber, 1); | |
| 42 // Ebml_WriteSigned16(glob, timeCode,2); //this is 3 bytes | |
| 43 Ebml_Serialize(glob, &timeCode, sizeof(timeCode), 2); | |
| 44 flags = 0x00 | (isKeyframe ? 0x80 : 0x00) | (lacingFlag << 1) | discardable; | |
| 45 Ebml_Write(glob, &flags, 1); | |
| 46 Ebml_Write(glob, data, dataLength); | |
| 47 } | |
| 48 | |
| 49 static UInt64 generateTrackID(unsigned int trackNumber) { | |
| 50 UInt64 t = time(NULL) * trackNumber; | |
| 51 UInt64 r = rand(); | |
| 52 r = r << 32; | |
| 53 r += rand(); | |
| 54 // UInt64 rval = t ^ r; | |
| 55 return t ^ r; | |
| 56 } | |
| 57 | |
| 58 void writeVideoTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing, | |
| 59 const char *codecId, unsigned int pixelWidth, unsigned int pixelHeight, | |
| 60 unsigned int displayWidth, unsigned int displayHeight, | |
| 61 double frameRate) { | |
| 62 EbmlLoc start; | |
| 63 UInt64 trackID; | |
| 64 Ebml_StartSubElement(glob, &start, TrackEntry); | |
| 65 Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber); | |
| 66 trackID = generateTrackID(trackNumber); | |
| 67 Ebml_SerializeUnsigned(glob, TrackUID, trackID); | |
| 68 Ebml_SerializeString(glob, CodecName, "VP8"); // TODO shouldn't be fixed | |
| 69 | |
| 70 Ebml_SerializeUnsigned(glob, TrackType, 1); // video is always 1 | |
| 71 Ebml_SerializeString(glob, CodecID, codecId); | |
| 72 { | |
| 73 EbmlLoc videoStart; | |
| 74 Ebml_StartSubElement(glob, &videoStart, Video); | |
| 75 Ebml_SerializeUnsigned(glob, PixelWidth, pixelWidth); | |
| 76 Ebml_SerializeUnsigned(glob, PixelHeight, pixelHeight); | |
| 77 if (pixelWidth != displayWidth) { | |
| 78 Ebml_SerializeUnsigned(glob, DisplayWidth, displayWidth); | |
| 79 } | |
| 80 if (pixelHeight != displayHeight) { | |
| 81 Ebml_SerializeUnsigned(glob, DisplayHeight, displayHeight); | |
| 82 } | |
| 83 Ebml_SerializeFloat(glob, FrameRate, frameRate); | |
| 84 Ebml_EndSubElement(glob, &videoStart); // Video | |
| 85 } | |
| 86 Ebml_EndSubElement(glob, &start); // Track Entry | |
| 87 } | |
| 88 void writeAudioTrack(EbmlGlobal *glob, unsigned int trackNumber, int flagLacing, | |
| 89 const char *codecId, double samplingFrequency, unsigned int channels, | |
| 90 unsigned char *private, unsigned long privateSize) { | |
| 91 EbmlLoc start; | |
| 92 UInt64 trackID; | |
| 93 Ebml_StartSubElement(glob, &start, TrackEntry); | |
| 94 Ebml_SerializeUnsigned(glob, TrackNumber, trackNumber); | |
| 95 trackID = generateTrackID(trackNumber); | |
| 96 Ebml_SerializeUnsigned(glob, TrackUID, trackID); | |
| 97 Ebml_SerializeUnsigned(glob, TrackType, 2); // audio is always 2 | |
| 98 // I am using defaults for thesed required fields | |
| 99 /* Ebml_SerializeUnsigned(glob, FlagEnabled, 1); | |
| 100 Ebml_SerializeUnsigned(glob, FlagDefault, 1); | |
| 101 Ebml_SerializeUnsigned(glob, FlagForced, 1); | |
| 102 Ebml_SerializeUnsigned(glob, FlagLacing, flagLacing);*/ | |
| 103 Ebml_SerializeString(glob, CodecID, codecId); | |
| 104 Ebml_SerializeData(glob, CodecPrivate, private, privateSize); | |
| 105 | |
| 106 Ebml_SerializeString(glob, CodecName, "VORBIS"); // fixed for now | |
| 107 { | |
| 108 EbmlLoc AudioStart; | |
| 109 Ebml_StartSubElement(glob, &AudioStart, Audio); | |
| 110 Ebml_SerializeFloat(glob, SamplingFrequency, samplingFrequency); | |
| 111 Ebml_SerializeUnsigned(glob, Channels, channels); | |
| 112 Ebml_EndSubElement(glob, &AudioStart); | |
| 113 } | |
| 114 Ebml_EndSubElement(glob, &start); | |
| 115 } | |
| 116 void writeSegmentInformation(EbmlGlobal *ebml, EbmlLoc *startInfo, unsigned long timeCodeScale, double duration) { | |
| 117 Ebml_StartSubElement(ebml, startInfo, Info); | |
| 118 Ebml_SerializeUnsigned(ebml, TimecodeScale, timeCodeScale); | |
| 119 Ebml_SerializeFloat(ebml, Segment_Duration, duration * 1000.0); // Currently fixed to using milliseconds | |
| 120 Ebml_SerializeString(ebml, 0x4D80, "QTmuxingAppLibWebM-0.0.1"); | |
| 121 Ebml_SerializeString(ebml, 0x5741, "QTwritingAppLibWebM-0.0.1"); | |
| 122 Ebml_EndSubElement(ebml, startInfo); | |
| 123 } | |
| 124 | |
| 125 /* | |
| 126 void Mkv_InitializeSegment(Ebml& ebml_out, EbmlLoc& ebmlLoc) | |
| 127 { | |
| 128 Ebml_StartSubElement(ebml_out, ebmlLoc, 0x18538067); | |
| 129 } | |
| 130 | |
| 131 void Mkv_InitializeSeek(Ebml& ebml_out, EbmlLoc& ebmlLoc) | |
| 132 { | |
| 133 Ebml_StartSubElement(ebml_out, ebmlLoc, 0x114d9b74); | |
| 134 } | |
| 135 void Mkv_WriteSeekInformation(Ebml& ebml_out, SeekStruct& seekInformation) | |
| 136 { | |
| 137 EbmlLoc ebmlLoc; | |
| 138 Ebml_StartSubElement(ebml_out, ebmlLoc, 0x4dbb); | |
| 139 Ebml_SerializeString(ebml_out, 0x53ab, seekInformation.SeekID); | |
| 140 Ebml_SerializeUnsigned(ebml_out, 0x53ac, seekInformation.SeekPosition); | |
| 141 Ebml_EndSubElement(ebml_out, ebmlLoc); | |
| 142 } | |
| 143 | |
| 144 void Mkv_WriteSegmentInformation(Ebml& ebml_out, SegmentInformationStruct& segmentInformation) | |
| 145 { | |
| 146 Ebml_SerializeUnsigned(ebml_out, 0x73a4, segmentInformation.segmentUID); | |
| 147 if (segmentInformation.filename != 0) | |
| 148 Ebml_SerializeString(ebml_out, 0x7384, segmentInformation.filename); | |
| 149 Ebml_SerializeUnsigned(ebml_out, 0x2AD7B1, segmentInformation.TimecodeScale); | |
| 150 Ebml_SerializeUnsigned(ebml_out, 0x4489, segmentInformation.Duration); | |
| 151 // TODO date | |
| 152 Ebml_SerializeWString(ebml_out, 0x4D80, L"MKVMUX"); | |
| 153 Ebml_SerializeWString(ebml_out, 0x5741, segmentInformation.WritingApp); | |
| 154 } | |
| 155 | |
| 156 void Mkv_InitializeTrack(Ebml& ebml_out, EbmlLoc& ebmlLoc) | |
| 157 { | |
| 158 Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1654AE6B); | |
| 159 } | |
| 160 | |
| 161 static void Mkv_WriteGenericTrackData(Ebml& ebml_out, TrackStruct& track) | |
| 162 { | |
| 163 Ebml_SerializeUnsigned(ebml_out, 0xD7, track.TrackNumber); | |
| 164 Ebml_SerializeUnsigned(ebml_out, 0x73C5, track.TrackUID); | |
| 165 Ebml_SerializeUnsigned(ebml_out, 0x83, track.TrackType); | |
| 166 Ebml_SerializeUnsigned(ebml_out, 0xB9, track.FlagEnabled ? 1 :0); | |
| 167 Ebml_SerializeUnsigned(ebml_out, 0x88, track.FlagDefault ? 1 :0); | |
| 168 Ebml_SerializeUnsigned(ebml_out, 0x55AA, track.FlagForced ? 1 :0); | |
| 169 if (track.Language != 0) | |
| 170 Ebml_SerializeString(ebml_out, 0x22B59C, track.Language); | |
| 171 if (track.CodecID != 0) | |
| 172 Ebml_SerializeString(ebml_out, 0x86, track.CodecID); | |
| 173 if (track.CodecPrivate != 0) | |
| 174 Ebml_SerializeData(ebml_out, 0x63A2, track.CodecPrivate, track.CodecPrivateLength); | |
| 175 if (track.CodecName != 0) | |
| 176 Ebml_SerializeWString(ebml_out, 0x258688, track.CodecName); | |
| 177 } | |
| 178 | |
| 179 void Mkv_WriteVideoTrack(Ebml& ebml_out, TrackStruct & track, VideoTrackStruct& video) | |
| 180 { | |
| 181 EbmlLoc trackHeadLoc, videoHeadLoc; | |
| 182 Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE); // start Track | |
| 183 Mkv_WriteGenericTrackData(ebml_out, track); | |
| 184 Ebml_StartSubElement(ebml_out, videoHeadLoc, 0xE0); // start Video | |
| 185 Ebml_SerializeUnsigned(ebml_out, 0x9A, video.FlagInterlaced ? 1 :0); | |
| 186 Ebml_SerializeUnsigned(ebml_out, 0xB0, video.PixelWidth); | |
| 187 Ebml_SerializeUnsigned(ebml_out, 0xBA, video.PixelHeight); | |
| 188 Ebml_SerializeUnsigned(ebml_out, 0x54B0, video.PixelDisplayWidth); | |
| 189 Ebml_SerializeUnsigned(ebml_out, 0x54BA, video.PixelDisplayHeight); | |
| 190 Ebml_SerializeUnsigned(ebml_out, 0x54B2, video.displayUnit); | |
| 191 Ebml_SerializeFloat(ebml_out, 0x2383E3, video.FrameRate); | |
| 192 Ebml_EndSubElement(ebml_out, videoHeadLoc); | |
| 193 Ebml_EndSubElement(ebml_out, trackHeadLoc); | |
| 194 | |
| 195 } | |
| 196 | |
| 197 void Mkv_WriteAudioTrack(Ebml& ebml_out, TrackStruct & track, AudioTrackStruct& video) | |
| 198 { | |
| 199 EbmlLoc trackHeadLoc, audioHeadLoc; | |
| 200 Ebml_StartSubElement(ebml_out, trackHeadLoc, 0xAE); | |
| 201 Mkv_WriteGenericTrackData(ebml_out, track); | |
| 202 Ebml_StartSubElement(ebml_out, audioHeadLoc, 0xE0); // start Audio | |
| 203 Ebml_SerializeFloat(ebml_out, 0xB5, video.SamplingFrequency); | |
| 204 Ebml_SerializeUnsigned(ebml_out, 0x9F, video.Channels); | |
| 205 Ebml_SerializeUnsigned(ebml_out, 0x6264, video.BitDepth); | |
| 206 Ebml_EndSubElement(ebml_out, audioHeadLoc); // end audio | |
| 207 Ebml_EndSubElement(ebml_out, trackHeadLoc); | |
| 208 } | |
| 209 | |
| 210 void Mkv_WriteEbmlClusterHead(Ebml& ebml_out, EbmlLoc& ebmlLoc, ClusterHeadStruct & clusterHead) | |
| 211 { | |
| 212 Ebml_StartSubElement(ebml_out, ebmlLoc, 0x1F43B675); | |
| 213 Ebml_SerializeUnsigned(ebml_out, 0x6264, clusterHead.TimeCode); | |
| 214 } | |
| 215 | |
| 216 void Mkv_WriteSimpleBlockHead(Ebml& ebml_out, EbmlLoc& ebmlLoc, SimpleBlockStruct& block) | |
| 217 { | |
| 218 Ebml_StartSubElement(ebml_out, ebmlLoc, 0xA3); | |
| 219 Ebml_Write1UInt(ebml_out, block.TrackNumber); | |
| 220 Ebml_WriteSigned16(ebml_out,block.TimeCode); | |
| 221 unsigned char flags = 0x00 | (block.iskey ? 0x80:0x00) | (block.lacing << 1) | block.discardable; | |
| 222 Ebml_Write1UInt(ebml_out, flags); // TODO this may be the wrong function | |
| 223 Ebml_Serialize(ebml_out, block.data, block.dataLength); | |
| 224 Ebml_EndSubElement(ebml_out,ebmlLoc); | |
| 225 } | |
| 226 */ |
