2 * Matroska file demuxer (no muxer yet)
3 * Copyright (c) 2003-2004 The ffmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * Specs available on the matroska project page:
28 * http://www.matroska.org/.
32 /* For codec_get_bmp_id and codec_get_wav_id. */
34 #include "intfloat_readwrite.h"
36 /* EBML version supported */
37 #define EBML_VERSION 1
39 /* top-level master-IDs */
40 #define EBML_ID_HEADER 0x1A45DFA3
42 /* IDs in the HEADER master */
43 #define EBML_ID_EBMLVERSION 0x4286
44 #define EBML_ID_EBMLREADVERSION 0x42F7
45 #define EBML_ID_EBMLMAXIDLENGTH 0x42F2
46 #define EBML_ID_EBMLMAXSIZELENGTH 0x42F3
47 #define EBML_ID_DOCTYPE 0x4282
48 #define EBML_ID_DOCTYPEVERSION 0x4287
49 #define EBML_ID_DOCTYPEREADVERSION 0x4285
51 /* general EBML types */
52 #define EBML_ID_VOID 0xEC
55 * Matroska element IDs. max. 32-bit.
58 /* toplevel segment */
59 #define MATROSKA_ID_SEGMENT 0x18538067
61 /* matroska top-level master IDs */
62 #define MATROSKA_ID_INFO 0x1549A966
63 #define MATROSKA_ID_TRACKS 0x1654AE6B
64 #define MATROSKA_ID_CUES 0x1C53BB6B
65 #define MATROSKA_ID_TAGS 0x1254C367
66 #define MATROSKA_ID_SEEKHEAD 0x114D9B74
67 #define MATROSKA_ID_CLUSTER 0x1F43B675
69 /* IDs in the info master */
70 #define MATROSKA_ID_TIMECODESCALE 0x2AD7B1
71 #define MATROSKA_ID_DURATION 0x4489
72 #define MATROSKA_ID_TITLE 0x7BA9
73 #define MATROSKA_ID_WRITINGAPP 0x5741
74 #define MATROSKA_ID_MUXINGAPP 0x4D80
75 #define MATROSKA_ID_DATEUTC 0x4461
77 /* ID in the tracks master */
78 #define MATROSKA_ID_TRACKENTRY 0xAE
80 /* IDs in the trackentry master */
81 #define MATROSKA_ID_TRACKNUMBER 0xD7
82 #define MATROSKA_ID_TRACKUID 0x73C5
83 #define MATROSKA_ID_TRACKTYPE 0x83
84 #define MATROSKA_ID_TRACKAUDIO 0xE1
85 #define MATROSKA_ID_TRACKVIDEO 0xE0
86 #define MATROSKA_ID_CODECID 0x86
87 #define MATROSKA_ID_CODECPRIVATE 0x63A2
88 #define MATROSKA_ID_CODECNAME 0x258688
89 #define MATROSKA_ID_CODECINFOURL 0x3B4040
90 #define MATROSKA_ID_CODECDOWNLOADURL 0x26B240
91 #define MATROSKA_ID_TRACKNAME 0x536E
92 #define MATROSKA_ID_TRACKLANGUAGE 0x22B59C
93 #define MATROSKA_ID_TRACKFLAGENABLED 0xB9
94 #define MATROSKA_ID_TRACKFLAGDEFAULT 0x88
95 #define MATROSKA_ID_TRACKFLAGLACING 0x9C
96 #define MATROSKA_ID_TRACKMINCACHE 0x6DE7
97 #define MATROSKA_ID_TRACKMAXCACHE 0x6DF8
98 #define MATROSKA_ID_TRACKDEFAULTDURATION 0x23E383
100 /* IDs in the trackvideo master */
101 #define MATROSKA_ID_VIDEOFRAMERATE 0x2383E3
102 #define MATROSKA_ID_VIDEODISPLAYWIDTH 0x54B0
103 #define MATROSKA_ID_VIDEODISPLAYHEIGHT 0x54BA
104 #define MATROSKA_ID_VIDEOPIXELWIDTH 0xB0
105 #define MATROSKA_ID_VIDEOPIXELHEIGHT 0xBA
106 #define MATROSKA_ID_VIDEOFLAGINTERLACED 0x9A
107 #define MATROSKA_ID_VIDEOSTEREOMODE 0x53B9
108 #define MATROSKA_ID_VIDEOASPECTRATIO 0x54B3
109 #define MATROSKA_ID_VIDEOCOLOURSPACE 0x2EB524
111 /* IDs in the trackaudio master */
112 #define MATROSKA_ID_AUDIOSAMPLINGFREQ 0xB5
113 #define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ 0x78B5
115 #define MATROSKA_ID_AUDIOBITDEPTH 0x6264
116 #define MATROSKA_ID_AUDIOCHANNELS 0x9F
118 /* ID in the cues master */
119 #define MATROSKA_ID_POINTENTRY 0xBB
121 /* IDs in the pointentry master */
122 #define MATROSKA_ID_CUETIME 0xB3
123 #define MATROSKA_ID_CUETRACKPOSITION 0xB7
125 /* IDs in the cuetrackposition master */
126 #define MATROSKA_ID_CUETRACK 0xF7
127 #define MATROSKA_ID_CUECLUSTERPOSITION 0xF1
129 /* IDs in the tags master */
132 /* IDs in the seekhead master */
133 #define MATROSKA_ID_SEEKENTRY 0x4DBB
135 /* IDs in the seekpoint master */
136 #define MATROSKA_ID_SEEKID 0x53AB
137 #define MATROSKA_ID_SEEKPOSITION 0x53AC
139 /* IDs in the cluster master */
140 #define MATROSKA_ID_CLUSTERTIMECODE 0xE7
141 #define MATROSKA_ID_BLOCKGROUP 0xA0
142 #define MATROSKA_ID_SIMPLEBLOCK 0xA3
144 /* IDs in the blockgroup master */
145 #define MATROSKA_ID_BLOCK 0xA1
146 #define MATROSKA_ID_BLOCKDURATION 0x9B
147 #define MATROSKA_ID_BLOCKREFERENCE 0xFB
150 MATROSKA_TRACK_TYPE_VIDEO = 0x1,
151 MATROSKA_TRACK_TYPE_AUDIO = 0x2,
152 MATROSKA_TRACK_TYPE_COMPLEX = 0x3,
153 MATROSKA_TRACK_TYPE_LOGO = 0x10,
154 MATROSKA_TRACK_TYPE_SUBTITLE = 0x11,
155 MATROSKA_TRACK_TYPE_CONTROL = 0x20,
159 MATROSKA_EYE_MODE_MONO = 0x0,
160 MATROSKA_EYE_MODE_RIGHT = 0x1,
161 MATROSKA_EYE_MODE_LEFT = 0x2,
162 MATROSKA_EYE_MODE_BOTH = 0x3,
166 MATROSKA_ASPECT_RATIO_MODE_FREE = 0x0,
167 MATROSKA_ASPECT_RATIO_MODE_KEEP = 0x1,
168 MATROSKA_ASPECT_RATIO_MODE_FIXED = 0x2,
169 } MatroskaAspectRatioMode;
172 * These aren't in any way "matroska-form" things,
173 * it's just something I use in the muxer/demuxer.
177 MATROSKA_TRACK_ENABLED = (1<<0),
178 MATROSKA_TRACK_DEFAULT = (1<<1),
179 MATROSKA_TRACK_LACING = (1<<2),
180 MATROSKA_TRACK_REAL_V = (1<<4),
181 MATROSKA_TRACK_SHIFT = (1<<16)
182 } MatroskaTrackFlags;
185 MATROSKA_VIDEOTRACK_INTERLACED = (MATROSKA_TRACK_SHIFT<<0)
186 } MatroskaVideoTrackFlags;
189 * Matroska Codec IDs. Strings.
192 typedef struct CodecTags{
197 #define MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC "V_MS/VFW/FOURCC"
198 #define MATROSKA_CODEC_ID_AUDIO_ACM "A_MS/ACM"
200 static CodecTags codec_tags[]={
201 // {"V_MS/VFW/FOURCC" , CODEC_ID_NONE},
202 {"V_UNCOMPRESSED" , CODEC_ID_RAWVIDEO},
203 {"V_MPEG4/ISO/SP" , CODEC_ID_MPEG4},
204 {"V_MPEG4/ISO/ASP" , CODEC_ID_MPEG4},
205 {"V_MPEG4/ISO/AP" , CODEC_ID_MPEG4},
206 {"V_MPEG4/ISO/AVC" , CODEC_ID_H264},
207 {"V_MPEG4/MS/V3" , CODEC_ID_MSMPEG4V3},
208 {"V_MPEG1" , CODEC_ID_MPEG1VIDEO},
209 {"V_MPEG2" , CODEC_ID_MPEG2VIDEO},
210 {"V_MJPEG" , CODEC_ID_MJPEG},
211 {"V_REAL/RV10" , CODEC_ID_RV10},
212 {"V_REAL/RV20" , CODEC_ID_RV20},
213 {"V_REAL/RV30" , CODEC_ID_RV30},
214 {"V_REAL/RV40" , CODEC_ID_RV40},
215 /* TODO: Real/Quicktime */
217 // {"A_MS/ACM" , CODEC_ID_NONE},
218 {"A_MPEG/L1" , CODEC_ID_MP3},
219 {"A_MPEG/L2" , CODEC_ID_MP3},
220 {"A_MPEG/L3" , CODEC_ID_MP3},
221 {"A_PCM/INT/BIG" , CODEC_ID_PCM_U16BE},
222 {"A_PCM/INT/LIT" , CODEC_ID_PCM_U16LE},
223 // {"A_PCM/FLOAT/IEEE" , CODEC_ID_NONE},
224 {"A_AC3" , CODEC_ID_AC3},
225 {"A_DTS" , CODEC_ID_DTS},
226 {"A_VORBIS" , CODEC_ID_VORBIS},
227 {"A_AAC" , CODEC_ID_AAC},
228 {"A_FLAC" , CODEC_ID_FLAC},
229 {"A_WAVPACK4" , CODEC_ID_WAVPACK},
230 {"A_TTA1" , CODEC_ID_TTA},
231 {NULL , CODEC_ID_NONE}
232 /* TODO: AC3-9/10 (?), Real, Musepack, Quicktime */
235 /* max. depth in the EBML tree structure */
236 #define EBML_MAX_DEPTH 16
238 typedef struct Track {
239 MatroskaTrackType type;
241 /* Unique track number and track ID. stream_index is the index that
242 * the calling app uses for this track. */
253 unsigned char *codec_priv;
256 int64_t default_duration;
257 MatroskaTrackFlags flags;
260 typedef struct MatroskaVideoTrack {
270 MatroskaAspectRatioMode ar_mode;
271 MatroskaEyeMode eye_mode;
274 } MatroskaVideoTrack;
276 typedef struct MatroskaAudioTrack {
284 } MatroskaAudioTrack;
286 typedef struct MatroskaSubtitleTrack {
290 } MatroskaSubtitleTrack;
292 #define MAX_TRACK_SIZE (FFMAX(FFMAX(sizeof(MatroskaVideoTrack), \
293 sizeof(MatroskaAudioTrack)), \
294 sizeof(MatroskaSubtitleTrack)))
296 typedef struct MatroskaLevel {
297 uint64_t start, length;
300 typedef struct MatroskaDemuxIndex {
301 uint64_t pos; /* of the corresponding *cluster*! */
302 uint16_t track; /* reference to 'num' */
303 uint64_t time; /* in nanoseconds */
304 } MatroskaDemuxIndex;
306 typedef struct MatroskaDemuxContext {
307 AVFormatContext *ctx;
311 MatroskaLevel levels[EBML_MAX_DEPTH];
319 /* timescale in the file */
322 /* position (time, ns) */
325 /* num_streams is the number of streams that av_new_stream() was called
326 * for ( = that are available to the calling program). */
327 int num_tracks, num_streams;
328 MatroskaTrack *tracks[MAX_STREAMS];
330 /* cache for ID peeking */
333 /* byte position of the segment inside the stream */
334 offset_t segment_start;
336 /* The packet queue. */
340 /* have we already parse metadata/cues/clusters? */
345 /* The index for seeking. */
347 MatroskaDemuxIndex *index;
348 } MatroskaDemuxContext;
351 * The first few functions handle EBML file parsing. The rest
352 * is the document interpretation. Matroska really just is a
357 * Return: the amount of levels in the hierarchy that the
358 * current element lies higher than the previous one.
359 * The opposite isn't done - that's auto-done using master
364 ebml_read_element_level_up (MatroskaDemuxContext *matroska)
366 ByteIOContext *pb = &matroska->ctx->pb;
367 offset_t pos = url_ftell(pb);
370 while (matroska->num_levels > 0) {
371 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
373 if (pos >= level->start + level->length) {
374 matroska->num_levels--;
385 * Read: an "EBML number", which is defined as a variable-length
386 * array of bytes. The first byte indicates the length by giving a
387 * number of 0-bits followed by a one. The position of the first
388 * "one" bit inside the first byte indicates the length of this
390 * Returns: num. of bytes read. < 0 on error.
394 ebml_read_num (MatroskaDemuxContext *matroska,
398 ByteIOContext *pb = &matroska->ctx->pb;
399 int len_mask = 0x80, read = 1, n = 1;
402 /* the first byte tells us the length in bytes - get_byte() can normally
403 * return 0, but since that's not a valid first ebmlID byte, we can
404 * use it safely here to catch EOS. */
405 if (!(total = get_byte(pb))) {
406 /* we might encounter EOS here */
408 offset_t pos = url_ftell(pb);
409 av_log(matroska->ctx, AV_LOG_ERROR,
410 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
413 return AVERROR_IO; /* EOS or actual I/O error */
416 /* get the length of the EBML number */
417 while (read <= max_size && !(total & len_mask)) {
421 if (read > max_size) {
422 offset_t pos = url_ftell(pb) - 1;
423 av_log(matroska->ctx, AV_LOG_ERROR,
424 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
425 (uint8_t) total, pos, pos);
426 return AVERROR_INVALIDDATA;
429 /* read out length */
432 total = (total << 8) | get_byte(pb);
440 * Read: the element content data ID.
441 * Return: the number of bytes read or < 0 on error.
445 ebml_read_element_id (MatroskaDemuxContext *matroska,
452 /* if we re-call this, use our cached ID */
453 if (matroska->peek_id != 0) {
456 *id = matroska->peek_id;
460 /* read out the "EBML number", include tag in ID */
461 if ((read = ebml_read_num(matroska, 4, &total)) < 0)
463 *id = matroska->peek_id = total | (1 << (read * 7));
467 *level_up = ebml_read_element_level_up(matroska);
473 * Read: element content length.
474 * Return: the number of bytes read or < 0 on error.
478 ebml_read_element_length (MatroskaDemuxContext *matroska,
481 /* clear cache since we're now beyond that data point */
482 matroska->peek_id = 0;
484 /* read out the "EBML number", include tag in ID */
485 return ebml_read_num(matroska, 8, length);
489 * Return: the ID of the next element, or 0 on error.
490 * Level_up contains the amount of levels that this
491 * next element lies higher than the previous one.
495 ebml_peek_id (MatroskaDemuxContext *matroska,
500 assert(level_up != NULL);
502 if (ebml_read_element_id(matroska, &id, level_up) < 0)
509 * Seek to a given offset.
510 * 0 is success, -1 is failure.
514 ebml_read_seek (MatroskaDemuxContext *matroska,
517 ByteIOContext *pb = &matroska->ctx->pb;
519 /* clear ID cache, if any */
520 matroska->peek_id = 0;
522 return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1;
526 * Skip the next element.
527 * 0 is success, -1 is failure.
531 ebml_read_skip (MatroskaDemuxContext *matroska)
533 ByteIOContext *pb = &matroska->ctx->pb;
538 if ((res = ebml_read_element_id(matroska, &id, NULL)) < 0 ||
539 (res = ebml_read_element_length(matroska, &length)) < 0)
542 url_fskip(pb, length);
548 * Read the next element as an unsigned int.
549 * 0 is success, < 0 is failure.
553 ebml_read_uint (MatroskaDemuxContext *matroska,
557 ByteIOContext *pb = &matroska->ctx->pb;
558 int n = 0, size, res;
561 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
562 (res = ebml_read_element_length(matroska, &rlength)) < 0)
565 if (size < 1 || size > 8) {
566 offset_t pos = url_ftell(pb);
567 av_log(matroska->ctx, AV_LOG_ERROR,
568 "Invalid uint element size %d at position %"PRId64" (0x%"PRIx64")\n",
570 return AVERROR_INVALIDDATA;
573 /* big-endian ordening; build up number */
576 *num = (*num << 8) | get_byte(pb);
582 * Read the next element as a signed int.
583 * 0 is success, < 0 is failure.
587 ebml_read_sint (MatroskaDemuxContext *matroska,
591 ByteIOContext *pb = &matroska->ctx->pb;
592 int size, n = 1, negative = 0, res;
595 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
596 (res = ebml_read_element_length(matroska, &rlength)) < 0)
599 if (size < 1 || size > 8) {
600 offset_t pos = url_ftell(pb);
601 av_log(matroska->ctx, AV_LOG_ERROR,
602 "Invalid sint element size %d at position %"PRId64" (0x%"PRIx64")\n",
604 return AVERROR_INVALIDDATA;
606 if ((*num = get_byte(pb)) & 0x80) {
612 *num = (*num << 8) | get_byte(pb);
616 *num = *num - (1LL << ((8 * size) - 1));
622 * Read the next element as a float.
623 * 0 is success, < 0 is failure.
627 ebml_read_float (MatroskaDemuxContext *matroska,
631 ByteIOContext *pb = &matroska->ctx->pb;
635 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
636 (res = ebml_read_element_length(matroska, &rlength)) < 0)
641 *num= av_int2flt(get_be32(pb));
643 *num= av_int2dbl(get_be64(pb));
645 offset_t pos = url_ftell(pb);
646 av_log(matroska->ctx, AV_LOG_ERROR,
647 "Invalid float element size %d at position %"PRIu64" (0x%"PRIx64")\n",
649 return AVERROR_INVALIDDATA;
656 * Read the next element as an ASCII string.
657 * 0 is success, < 0 is failure.
661 ebml_read_ascii (MatroskaDemuxContext *matroska,
665 ByteIOContext *pb = &matroska->ctx->pb;
669 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
670 (res = ebml_read_element_length(matroska, &rlength)) < 0)
674 /* ebml strings are usually not 0-terminated, so we allocate one
675 * byte more, read the string and NULL-terminate it ourselves. */
676 if (size < 0 || !(*str = av_malloc(size + 1))) {
677 av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation failed\n");
678 return AVERROR_NOMEM;
680 if (get_buffer(pb, (uint8_t *) *str, size) != size) {
681 offset_t pos = url_ftell(pb);
682 av_log(matroska->ctx, AV_LOG_ERROR,
683 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
692 * Read the next element as a UTF-8 string.
693 * 0 is success, < 0 is failure.
697 ebml_read_utf8 (MatroskaDemuxContext *matroska,
701 return ebml_read_ascii(matroska, id, str);
705 * Read the next element as a date (nanoseconds since 1/1/2000).
706 * 0 is success, < 0 is failure.
710 ebml_read_date (MatroskaDemuxContext *matroska,
714 return ebml_read_sint(matroska, id, date);
718 * Read the next element, but only the header. The contents
719 * are supposed to be sub-elements which can be read separately.
720 * 0 is success, < 0 is failure.
724 ebml_read_master (MatroskaDemuxContext *matroska,
727 ByteIOContext *pb = &matroska->ctx->pb;
729 MatroskaLevel *level;
732 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
733 (res = ebml_read_element_length(matroska, &length)) < 0)
736 /* protect... (Heaven forbids that the '>' is true) */
737 if (matroska->num_levels >= EBML_MAX_DEPTH) {
738 av_log(matroska->ctx, AV_LOG_ERROR,
739 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
740 return AVERROR_NOTSUPP;
744 level = &matroska->levels[matroska->num_levels++];
745 level->start = url_ftell(pb);
746 level->length = length;
752 * Read the next element as binary data.
753 * 0 is success, < 0 is failure.
757 ebml_read_binary (MatroskaDemuxContext *matroska,
762 ByteIOContext *pb = &matroska->ctx->pb;
766 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
767 (res = ebml_read_element_length(matroska, &rlength)) < 0)
771 if (!(*binary = av_malloc(*size))) {
772 av_log(matroska->ctx, AV_LOG_ERROR,
773 "Memory allocation error\n");
774 return AVERROR_NOMEM;
777 if (get_buffer(pb, *binary, *size) != *size) {
778 offset_t pos = url_ftell(pb);
779 av_log(matroska->ctx, AV_LOG_ERROR,
780 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
788 * Read signed/unsigned "EBML" numbers.
789 * Return: number of bytes processed, < 0 on error.
790 * XXX: use ebml_read_num().
794 matroska_ebmlnum_uint (uint8_t *data,
798 int len_mask = 0x80, read = 1, n = 1, num_ffs = 0;
802 return AVERROR_INVALIDDATA;
805 while (read <= 8 && !(total & len_mask)) {
810 return AVERROR_INVALIDDATA;
812 if ((total &= (len_mask - 1)) == len_mask - 1)
815 return AVERROR_INVALIDDATA;
819 total = (total << 8) | data[n];
832 * Same as above, but signed.
836 matroska_ebmlnum_sint (uint8_t *data,
843 /* read as unsigned number first */
844 if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0)
847 /* make signed (weird way) */
848 if (unum == (uint64_t)-1)
851 *num = unum - ((1LL << ((7 * res) - 1)) - 1);
857 * Read an EBML header.
858 * 0 is success, < 0 is failure.
862 ebml_read_header (MatroskaDemuxContext *matroska,
867 int level_up, res = 0;
875 if (!(id = ebml_peek_id(matroska, &level_up)) ||
876 level_up != 0 || id != EBML_ID_HEADER) {
877 av_log(matroska->ctx, AV_LOG_ERROR,
878 "This is not an EBML file (id=0x%x/0x%x)\n", id, EBML_ID_HEADER);
879 return AVERROR_INVALIDDATA;
881 if ((res = ebml_read_master(matroska, &id)) < 0)
885 if (!(id = ebml_peek_id(matroska, &level_up)))
893 /* is our read version uptodate? */
894 case EBML_ID_EBMLREADVERSION: {
897 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
899 if (num > EBML_VERSION) {
900 av_log(matroska->ctx, AV_LOG_ERROR,
901 "EBML version %"PRIu64" (> %d) is not supported\n",
903 return AVERROR_INVALIDDATA;
908 /* we only handle 8 byte lengths at max */
909 case EBML_ID_EBMLMAXSIZELENGTH: {
912 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
914 if (num > sizeof(uint64_t)) {
915 av_log(matroska->ctx, AV_LOG_ERROR,
916 "Integers of size %"PRIu64" (> %zd) not supported\n",
917 num, sizeof(uint64_t));
918 return AVERROR_INVALIDDATA;
923 /* we handle 4 byte IDs at max */
924 case EBML_ID_EBMLMAXIDLENGTH: {
927 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
929 if (num > sizeof(uint32_t)) {
930 av_log(matroska->ctx, AV_LOG_ERROR,
931 "IDs of size %"PRIu64" (> %zu) not supported\n",
932 num, sizeof(uint32_t));
933 return AVERROR_INVALIDDATA;
938 case EBML_ID_DOCTYPE: {
941 if ((res = ebml_read_ascii(matroska, &id, &text)) < 0)
952 case EBML_ID_DOCTYPEREADVERSION: {
955 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
963 av_log(matroska->ctx, AV_LOG_INFO,
964 "Unknown data type 0x%x in EBML header", id);
968 /* we ignore these two, as they don't tell us anything we
970 case EBML_ID_EBMLVERSION:
971 case EBML_ID_DOCTYPEVERSION:
972 res = ebml_read_skip (matroska);
981 * Put one packet in an application-supplied AVPacket struct.
982 * Returns 0 on success or -1 on failure.
986 matroska_deliver_packet (MatroskaDemuxContext *matroska,
989 if (matroska->num_packets > 0) {
990 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
991 av_free(matroska->packets[0]);
992 if (matroska->num_packets > 1) {
993 memmove(&matroska->packets[0], &matroska->packets[1],
994 (matroska->num_packets - 1) * sizeof(AVPacket *));
996 av_realloc(matroska->packets, (matroska->num_packets - 1) *
999 av_freep(&matroska->packets);
1001 matroska->num_packets--;
1009 * Put a packet into our internal queue. Will be delivered to the
1010 * user/application during the next get_packet() call.
1014 matroska_queue_packet (MatroskaDemuxContext *matroska,
1018 av_realloc(matroska->packets, (matroska->num_packets + 1) *
1019 sizeof(AVPacket *));
1020 matroska->packets[matroska->num_packets] = pkt;
1021 matroska->num_packets++;
1029 matroska_probe (AVProbeData *p)
1032 int len_mask = 0x80, size = 1, n = 1;
1033 uint8_t probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' };
1035 if (p->buf_size < 5)
1039 if ((p->buf[0] << 24 | p->buf[1] << 16 |
1040 p->buf[2] << 8 | p->buf[3]) != EBML_ID_HEADER)
1043 /* length of header */
1045 while (size <= 8 && !(total & len_mask)) {
1051 total &= (len_mask - 1);
1053 total = (total << 8) | p->buf[4 + n++];
1055 /* does the probe data contain the whole header? */
1056 if (p->buf_size < 4 + size + total)
1059 /* the header must contain the document type 'matroska'. For now,
1060 * we don't parse the whole header but simply check for the
1061 * availability of that array of characters inside the header.
1062 * Not fully fool-proof, but good enough. */
1063 for (n = 4 + size; n <= 4 + size + total - sizeof(probe_data); n++)
1064 if (!memcmp (&p->buf[n], probe_data, sizeof(probe_data)))
1065 return AVPROBE_SCORE_MAX;
1071 * From here on, it's all XML-style DTD stuff... Needs no comments.
1075 matroska_parse_info (MatroskaDemuxContext *matroska)
1080 av_log(matroska->ctx, AV_LOG_DEBUG, "Parsing info...\n");
1083 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1086 } else if (matroska->level_up) {
1087 matroska->level_up--;
1092 /* cluster timecode */
1093 case MATROSKA_ID_TIMECODESCALE: {
1095 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1097 matroska->time_scale = num;
1101 case MATROSKA_ID_DURATION: {
1103 if ((res = ebml_read_float(matroska, &id, &num)) < 0)
1105 matroska->ctx->duration = num * matroska->time_scale * 1000 / AV_TIME_BASE;
1109 case MATROSKA_ID_TITLE: {
1111 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1113 strncpy(matroska->ctx->title, text,
1114 sizeof(matroska->ctx->title)-1);
1119 case MATROSKA_ID_WRITINGAPP: {
1121 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1123 matroska->writing_app = text;
1127 case MATROSKA_ID_MUXINGAPP: {
1129 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1131 matroska->muxing_app = text;
1135 case MATROSKA_ID_DATEUTC: {
1137 if ((res = ebml_read_date(matroska, &id, &time)) < 0)
1139 matroska->created = time;
1144 av_log(matroska->ctx, AV_LOG_INFO,
1145 "Unknown entry 0x%x in info header\n", id);
1149 res = ebml_read_skip(matroska);
1153 if (matroska->level_up) {
1154 matroska->level_up--;
1163 matroska_add_stream (MatroskaDemuxContext *matroska)
1167 MatroskaTrack *track;
1169 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing track, adding stream..,\n");
1171 /* Allocate a generic track. As soon as we know its type we'll realloc. */
1172 track = av_mallocz(MAX_TRACK_SIZE);
1173 matroska->num_tracks++;
1175 /* start with the master */
1176 if ((res = ebml_read_master(matroska, &id)) < 0)
1179 /* try reading the trackentry headers */
1181 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1184 } else if (matroska->level_up > 0) {
1185 matroska->level_up--;
1190 /* track number (unique stream ID) */
1191 case MATROSKA_ID_TRACKNUMBER: {
1193 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1199 /* track UID (unique identifier) */
1200 case MATROSKA_ID_TRACKUID: {
1202 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1208 /* track type (video, audio, combined, subtitle, etc.) */
1209 case MATROSKA_ID_TRACKTYPE: {
1211 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1213 if (track->type && track->type != num) {
1214 av_log(matroska->ctx, AV_LOG_INFO,
1215 "More than one tracktype in an entry - skip\n");
1220 switch (track->type) {
1221 case MATROSKA_TRACK_TYPE_VIDEO:
1222 case MATROSKA_TRACK_TYPE_AUDIO:
1223 case MATROSKA_TRACK_TYPE_SUBTITLE:
1225 case MATROSKA_TRACK_TYPE_COMPLEX:
1226 case MATROSKA_TRACK_TYPE_LOGO:
1227 case MATROSKA_TRACK_TYPE_CONTROL:
1229 av_log(matroska->ctx, AV_LOG_INFO,
1230 "Unknown or unsupported track type 0x%x\n",
1235 matroska->tracks[matroska->num_tracks - 1] = track;
1239 /* tracktype specific stuff for video */
1240 case MATROSKA_ID_TRACKVIDEO: {
1241 MatroskaVideoTrack *videotrack;
1243 track->type = MATROSKA_TRACK_TYPE_VIDEO;
1244 if (track->type != MATROSKA_TRACK_TYPE_VIDEO) {
1245 av_log(matroska->ctx, AV_LOG_INFO,
1246 "video data in non-video track - ignoring\n");
1247 res = AVERROR_INVALIDDATA;
1249 } else if ((res = ebml_read_master(matroska, &id)) < 0)
1251 videotrack = (MatroskaVideoTrack *)track;
1254 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1257 } else if (matroska->level_up > 0) {
1258 matroska->level_up--;
1263 /* fixme, this should be one-up, but I get it here */
1264 case MATROSKA_ID_TRACKDEFAULTDURATION: {
1266 if ((res = ebml_read_uint (matroska, &id,
1269 track->default_duration = num;
1273 /* video framerate */
1274 case MATROSKA_ID_VIDEOFRAMERATE: {
1276 if ((res = ebml_read_float(matroska, &id,
1279 track->default_duration = 1000000000 * (1. / num);
1283 /* width of the size to display the video at */
1284 case MATROSKA_ID_VIDEODISPLAYWIDTH: {
1286 if ((res = ebml_read_uint(matroska, &id,
1289 videotrack->display_width = num;
1293 /* height of the size to display the video at */
1294 case MATROSKA_ID_VIDEODISPLAYHEIGHT: {
1296 if ((res = ebml_read_uint(matroska, &id,
1299 videotrack->display_height = num;
1303 /* width of the video in the file */
1304 case MATROSKA_ID_VIDEOPIXELWIDTH: {
1306 if ((res = ebml_read_uint(matroska, &id,
1309 videotrack->pixel_width = num;
1313 /* height of the video in the file */
1314 case MATROSKA_ID_VIDEOPIXELHEIGHT: {
1316 if ((res = ebml_read_uint(matroska, &id,
1319 videotrack->pixel_height = num;
1323 /* whether the video is interlaced */
1324 case MATROSKA_ID_VIDEOFLAGINTERLACED: {
1326 if ((res = ebml_read_uint(matroska, &id,
1331 MATROSKA_VIDEOTRACK_INTERLACED;
1334 ~MATROSKA_VIDEOTRACK_INTERLACED;
1338 /* stereo mode (whether the video has two streams,
1339 * where one is for the left eye and the other for
1340 * the right eye, which creates a 3D-like
1342 case MATROSKA_ID_VIDEOSTEREOMODE: {
1344 if ((res = ebml_read_uint(matroska, &id,
1347 if (num != MATROSKA_EYE_MODE_MONO &&
1348 num != MATROSKA_EYE_MODE_LEFT &&
1349 num != MATROSKA_EYE_MODE_RIGHT &&
1350 num != MATROSKA_EYE_MODE_BOTH) {
1351 av_log(matroska->ctx, AV_LOG_INFO,
1352 "Ignoring unknown eye mode 0x%x\n",
1356 videotrack->eye_mode = num;
1360 /* aspect ratio behaviour */
1361 case MATROSKA_ID_VIDEOASPECTRATIO: {
1363 if ((res = ebml_read_uint(matroska, &id,
1366 if (num != MATROSKA_ASPECT_RATIO_MODE_FREE &&
1367 num != MATROSKA_ASPECT_RATIO_MODE_KEEP &&
1368 num != MATROSKA_ASPECT_RATIO_MODE_FIXED) {
1369 av_log(matroska->ctx, AV_LOG_INFO,
1370 "Ignoring unknown aspect ratio 0x%x\n",
1374 videotrack->ar_mode = num;
1378 /* colourspace (only matters for raw video)
1380 case MATROSKA_ID_VIDEOCOLOURSPACE: {
1382 if ((res = ebml_read_uint(matroska, &id,
1385 videotrack->fourcc = num;
1390 av_log(matroska->ctx, AV_LOG_INFO,
1391 "Unknown video track header entry "
1392 "0x%x - ignoring\n", id);
1396 res = ebml_read_skip(matroska);
1400 if (matroska->level_up) {
1401 matroska->level_up--;
1408 /* tracktype specific stuff for audio */
1409 case MATROSKA_ID_TRACKAUDIO: {
1410 MatroskaAudioTrack *audiotrack;
1412 track->type = MATROSKA_TRACK_TYPE_AUDIO;
1413 if (track->type != MATROSKA_TRACK_TYPE_AUDIO) {
1414 av_log(matroska->ctx, AV_LOG_INFO,
1415 "audio data in non-audio track - ignoring\n");
1416 res = AVERROR_INVALIDDATA;
1418 } else if ((res = ebml_read_master(matroska, &id)) < 0)
1420 audiotrack = (MatroskaAudioTrack *)track;
1421 audiotrack->channels = 1;
1422 audiotrack->samplerate = 8000;
1425 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1428 } else if (matroska->level_up > 0) {
1429 matroska->level_up--;
1435 case MATROSKA_ID_AUDIOSAMPLINGFREQ: {
1437 if ((res = ebml_read_float(matroska, &id,
1440 audiotrack->internal_samplerate =
1441 audiotrack->samplerate = num;
1445 case MATROSKA_ID_AUDIOOUTSAMPLINGFREQ: {
1447 if ((res = ebml_read_float(matroska, &id,
1450 audiotrack->samplerate = num;
1455 case MATROSKA_ID_AUDIOBITDEPTH: {
1457 if ((res = ebml_read_uint(matroska, &id,
1460 audiotrack->bitdepth = num;
1465 case MATROSKA_ID_AUDIOCHANNELS: {
1467 if ((res = ebml_read_uint(matroska, &id,
1470 audiotrack->channels = num;
1475 av_log(matroska->ctx, AV_LOG_INFO,
1476 "Unknown audio track header entry "
1477 "0x%x - ignoring\n", id);
1481 res = ebml_read_skip(matroska);
1485 if (matroska->level_up) {
1486 matroska->level_up--;
1493 /* codec identifier */
1494 case MATROSKA_ID_CODECID: {
1496 if ((res = ebml_read_ascii(matroska, &id, &text)) < 0)
1498 track->codec_id = text;
1502 /* codec private data */
1503 case MATROSKA_ID_CODECPRIVATE: {
1506 if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0))
1508 track->codec_priv = data;
1509 track->codec_priv_size = size;
1513 /* name of the codec */
1514 case MATROSKA_ID_CODECNAME: {
1516 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1518 track->codec_name = text;
1522 /* name of this track */
1523 case MATROSKA_ID_TRACKNAME: {
1525 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1531 /* language (matters for audio/subtitles, mostly) */
1532 case MATROSKA_ID_TRACKLANGUAGE: {
1534 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1536 track->language = text;
1540 /* whether this is actually used */
1541 case MATROSKA_ID_TRACKFLAGENABLED: {
1543 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1546 track->flags |= MATROSKA_TRACK_ENABLED;
1548 track->flags &= ~MATROSKA_TRACK_ENABLED;
1552 /* whether it's the default for this track type */
1553 case MATROSKA_ID_TRACKFLAGDEFAULT: {
1555 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1558 track->flags |= MATROSKA_TRACK_DEFAULT;
1560 track->flags &= ~MATROSKA_TRACK_DEFAULT;
1564 /* lacing (like MPEG, where blocks don't end/start on frame
1566 case MATROSKA_ID_TRACKFLAGLACING: {
1568 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1571 track->flags |= MATROSKA_TRACK_LACING;
1573 track->flags &= ~MATROSKA_TRACK_LACING;
1577 /* default length (in time) of one data block in this track */
1578 case MATROSKA_ID_TRACKDEFAULTDURATION: {
1580 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1582 track->default_duration = num;
1587 av_log(matroska->ctx, AV_LOG_INFO,
1588 "Unknown track header entry 0x%x - ignoring\n", id);
1592 /* we ignore these because they're nothing useful. */
1593 case MATROSKA_ID_CODECINFOURL:
1594 case MATROSKA_ID_CODECDOWNLOADURL:
1595 case MATROSKA_ID_TRACKMINCACHE:
1596 case MATROSKA_ID_TRACKMAXCACHE:
1597 res = ebml_read_skip(matroska);
1601 if (matroska->level_up) {
1602 matroska->level_up--;
1611 matroska_parse_tracks (MatroskaDemuxContext *matroska)
1616 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing tracks...\n");
1619 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1622 } else if (matroska->level_up) {
1623 matroska->level_up--;
1628 /* one track within the "all-tracks" header */
1629 case MATROSKA_ID_TRACKENTRY:
1630 res = matroska_add_stream(matroska);
1634 av_log(matroska->ctx, AV_LOG_INFO,
1635 "Unknown entry 0x%x in track header\n", id);
1639 res = ebml_read_skip(matroska);
1643 if (matroska->level_up) {
1644 matroska->level_up--;
1653 matroska_parse_index (MatroskaDemuxContext *matroska)
1657 MatroskaDemuxIndex idx;
1659 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing index...\n");
1662 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1665 } else if (matroska->level_up) {
1666 matroska->level_up--;
1671 /* one single index entry ('point') */
1672 case MATROSKA_ID_POINTENTRY:
1673 if ((res = ebml_read_master(matroska, &id)) < 0)
1676 /* in the end, we hope to fill one entry with a
1677 * timestamp, a file position and a tracknum */
1678 idx.pos = (uint64_t) -1;
1679 idx.time = (uint64_t) -1;
1680 idx.track = (uint16_t) -1;
1683 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1686 } else if (matroska->level_up) {
1687 matroska->level_up--;
1692 /* one single index entry ('point') */
1693 case MATROSKA_ID_CUETIME: {
1695 if ((res = ebml_read_uint(matroska, &id,
1698 idx.time = time * matroska->time_scale;
1702 /* position in the file + track to which it
1704 case MATROSKA_ID_CUETRACKPOSITION:
1705 if ((res = ebml_read_master(matroska, &id)) < 0)
1709 if (!(id = ebml_peek_id (matroska,
1710 &matroska->level_up))) {
1713 } else if (matroska->level_up) {
1714 matroska->level_up--;
1720 case MATROSKA_ID_CUETRACK: {
1722 if ((res = ebml_read_uint(matroska,
1729 /* position in file */
1730 case MATROSKA_ID_CUECLUSTERPOSITION: {
1732 if ((res = ebml_read_uint(matroska,
1740 av_log(matroska->ctx, AV_LOG_INFO,
1741 "Unknown entry 0x%x in "
1742 "CuesTrackPositions\n", id);
1746 res = ebml_read_skip(matroska);
1750 if (matroska->level_up) {
1751 matroska->level_up--;
1759 av_log(matroska->ctx, AV_LOG_INFO,
1760 "Unknown entry 0x%x in cuespoint "
1765 res = ebml_read_skip(matroska);
1769 if (matroska->level_up) {
1770 matroska->level_up--;
1775 /* so let's see if we got what we wanted */
1776 if (idx.pos != (uint64_t) -1 &&
1777 idx.time != (uint64_t) -1 &&
1778 idx.track != (uint16_t) -1) {
1779 if (matroska->num_indexes % 32 == 0) {
1780 /* re-allocate bigger index */
1782 av_realloc(matroska->index,
1783 (matroska->num_indexes + 32) *
1784 sizeof(MatroskaDemuxIndex));
1786 matroska->index[matroska->num_indexes] = idx;
1787 matroska->num_indexes++;
1792 av_log(matroska->ctx, AV_LOG_INFO,
1793 "Unknown entry 0x%x in cues header\n", id);
1797 res = ebml_read_skip(matroska);
1801 if (matroska->level_up) {
1802 matroska->level_up--;
1811 matroska_parse_metadata (MatroskaDemuxContext *matroska)
1817 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1820 } else if (matroska->level_up) {
1821 matroska->level_up--;
1826 /* Hm, this is unsupported... */
1828 av_log(matroska->ctx, AV_LOG_INFO,
1829 "Unknown entry 0x%x in metadata header\n", id);
1833 res = ebml_read_skip(matroska);
1837 if (matroska->level_up) {
1838 matroska->level_up--;
1847 matroska_parse_seekhead (MatroskaDemuxContext *matroska)
1852 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing seekhead...\n");
1855 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1858 } else if (matroska->level_up) {
1859 matroska->level_up--;
1864 case MATROSKA_ID_SEEKENTRY: {
1865 uint32_t seek_id = 0, peek_id_cache = 0;
1866 uint64_t seek_pos = (uint64_t) -1, t;
1868 if ((res = ebml_read_master(matroska, &id)) < 0)
1872 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1875 } else if (matroska->level_up) {
1876 matroska->level_up--;
1881 case MATROSKA_ID_SEEKID:
1882 res = ebml_read_uint(matroska, &id, &t);
1886 case MATROSKA_ID_SEEKPOSITION:
1887 res = ebml_read_uint(matroska, &id, &seek_pos);
1891 av_log(matroska->ctx, AV_LOG_INFO,
1892 "Unknown seekhead ID 0x%x\n", id);
1896 res = ebml_read_skip(matroska);
1900 if (matroska->level_up) {
1901 matroska->level_up--;
1906 if (!seek_id || seek_pos == (uint64_t) -1) {
1907 av_log(matroska->ctx, AV_LOG_INFO,
1908 "Incomplete seekhead entry (0x%x/%"PRIu64")\n",
1914 case MATROSKA_ID_CUES:
1915 case MATROSKA_ID_TAGS: {
1916 uint32_t level_up = matroska->level_up;
1917 offset_t before_pos;
1919 MatroskaLevel level;
1921 /* remember the peeked ID and the current position */
1922 peek_id_cache = matroska->peek_id;
1923 before_pos = url_ftell(&matroska->ctx->pb);
1926 if ((res = ebml_read_seek(matroska, seek_pos +
1927 matroska->segment_start)) < 0)
1930 /* we don't want to lose our seekhead level, so we add
1931 * a dummy. This is a crude hack. */
1932 if (matroska->num_levels == EBML_MAX_DEPTH) {
1933 av_log(matroska->ctx, AV_LOG_INFO,
1934 "Max EBML element depth (%d) reached, "
1935 "cannot parse further.\n", EBML_MAX_DEPTH);
1936 return AVERROR_UNKNOWN;
1940 level.length = (uint64_t)-1;
1941 matroska->levels[matroska->num_levels] = level;
1942 matroska->num_levels++;
1945 if (!(id = ebml_peek_id (matroska,
1946 &matroska->level_up)))
1948 if (id != seek_id) {
1949 av_log(matroska->ctx, AV_LOG_INFO,
1950 "We looked for ID=0x%x but got "
1951 "ID=0x%x (pos=%"PRIu64")",
1952 seek_id, id, seek_pos +
1953 matroska->segment_start);
1957 /* read master + parse */
1958 if ((res = ebml_read_master(matroska, &id)) < 0)
1961 case MATROSKA_ID_CUES:
1962 if (!(res = matroska_parse_index(matroska)) ||
1963 url_feof(&matroska->ctx->pb)) {
1964 matroska->index_parsed = 1;
1968 case MATROSKA_ID_TAGS:
1969 if (!(res = matroska_parse_metadata(matroska)) ||
1970 url_feof(&matroska->ctx->pb)) {
1971 matroska->metadata_parsed = 1;
1978 /* remove dummy level */
1979 while (matroska->num_levels) {
1980 matroska->num_levels--;
1982 matroska->levels[matroska->num_levels].length;
1983 if (length == (uint64_t)-1)
1988 if ((res = ebml_read_seek(matroska, before_pos)) < 0)
1990 matroska->peek_id = peek_id_cache;
1991 matroska->level_up = level_up;
1996 av_log(matroska->ctx, AV_LOG_INFO,
1997 "Ignoring seekhead entry for ID=0x%x\n",
2006 av_log(matroska->ctx, AV_LOG_INFO,
2007 "Unknown seekhead ID 0x%x\n", id);
2011 res = ebml_read_skip(matroska);
2015 if (matroska->level_up) {
2016 matroska->level_up--;
2024 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x))
2027 matroska_aac_profile (char *codec_id)
2029 static const char *aac_profiles[] = {
2034 for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++)
2035 if (strstr(codec_id, aac_profiles[profile]))
2041 matroska_aac_sri (int samplerate)
2043 static const int aac_sample_rates[] = {
2044 96000, 88200, 64000, 48000, 44100, 32000,
2045 24000, 22050, 16000, 12000, 11025, 8000,
2049 for (sri=0; sri<ARRAY_SIZE(aac_sample_rates); sri++)
2050 if (aac_sample_rates[sri] == samplerate)
2056 matroska_read_header (AVFormatContext *s,
2057 AVFormatParameters *ap)
2059 MatroskaDemuxContext *matroska = s->priv_data;
2061 int version, last_level, res = 0;
2066 /* First read the EBML header. */
2068 if ((res = ebml_read_header(matroska, &doctype, &version)) < 0)
2070 if ((doctype == NULL) || strcmp(doctype, "matroska")) {
2071 av_log(matroska->ctx, AV_LOG_ERROR,
2072 "Wrong EBML doctype ('%s' != 'matroska').\n",
2073 doctype ? doctype : "(none)");
2076 return AVERROR_NOFMT;
2080 av_log(matroska->ctx, AV_LOG_ERROR,
2081 "Matroska demuxer version 2 too old for file version %d\n",
2083 return AVERROR_NOFMT;
2086 /* The next thing is a segment. */
2088 if (!(id = ebml_peek_id(matroska, &last_level)))
2090 if (id == MATROSKA_ID_SEGMENT)
2094 av_log(matroska->ctx, AV_LOG_INFO,
2095 "Expected a Segment ID (0x%x), but received 0x%x!\n",
2096 MATROSKA_ID_SEGMENT, id);
2097 if ((res = ebml_read_skip(matroska)) < 0)
2101 /* We now have a Matroska segment.
2102 * Seeks are from the beginning of the segment,
2103 * after the segment ID/length. */
2104 if ((res = ebml_read_master(matroska, &id)) < 0)
2106 matroska->segment_start = url_ftell(&s->pb);
2108 matroska->time_scale = 1000000;
2109 /* we've found our segment, start reading the different contents in here */
2111 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2114 } else if (matroska->level_up) {
2115 matroska->level_up--;
2121 case MATROSKA_ID_INFO: {
2122 if ((res = ebml_read_master(matroska, &id)) < 0)
2124 res = matroska_parse_info(matroska);
2128 /* track info headers */
2129 case MATROSKA_ID_TRACKS: {
2130 if ((res = ebml_read_master(matroska, &id)) < 0)
2132 res = matroska_parse_tracks(matroska);
2137 case MATROSKA_ID_CUES: {
2138 if (!matroska->index_parsed) {
2139 if ((res = ebml_read_master(matroska, &id)) < 0)
2141 res = matroska_parse_index(matroska);
2143 res = ebml_read_skip(matroska);
2148 case MATROSKA_ID_TAGS: {
2149 if (!matroska->metadata_parsed) {
2150 if ((res = ebml_read_master(matroska, &id)) < 0)
2152 res = matroska_parse_metadata(matroska);
2154 res = ebml_read_skip(matroska);
2158 /* file index (if seekable, seek to Cues/Tags to parse it) */
2159 case MATROSKA_ID_SEEKHEAD: {
2160 if ((res = ebml_read_master(matroska, &id)) < 0)
2162 res = matroska_parse_seekhead(matroska);
2166 case MATROSKA_ID_CLUSTER: {
2167 /* Do not read the master - this will be done in the next
2168 * call to matroska_read_packet. */
2174 av_log(matroska->ctx, AV_LOG_INFO,
2175 "Unknown matroska file header ID 0x%x\n", id);
2179 res = ebml_read_skip(matroska);
2183 if (matroska->level_up) {
2184 matroska->level_up--;
2189 /* Have we found a cluster? */
2190 if (ebml_peek_id(matroska, NULL) == MATROSKA_ID_CLUSTER) {
2192 MatroskaTrack *track;
2195 for (i = 0; i < matroska->num_tracks; i++) {
2196 enum CodecID codec_id = CODEC_ID_NONE;
2197 uint8_t *extradata = NULL;
2198 int extradata_size = 0;
2199 int extradata_offset = 0;
2200 track = matroska->tracks[i];
2202 /* libavformat does not really support subtitles.
2203 * Also apply some sanity checks. */
2204 if ((track->type == MATROSKA_TRACK_TYPE_SUBTITLE) ||
2205 (track->codec_id == NULL))
2208 for(j=0; codec_tags[j].str; j++){
2209 if(!strncmp(codec_tags[j].str, track->codec_id,
2210 strlen(codec_tags[j].str))){
2211 codec_id= codec_tags[j].id;
2216 /* Set the FourCC from the CodecID. */
2217 /* This is the MS compatibility mode which stores a
2218 * BITMAPINFOHEADER in the CodecPrivate. */
2219 if (!strcmp(track->codec_id,
2220 MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC) &&
2221 (track->codec_priv_size >= 40) &&
2222 (track->codec_priv != NULL)) {
2225 /* Offset of biCompression. Stored in LE. */
2226 p = (unsigned char *)track->codec_priv + 16;
2227 ((MatroskaVideoTrack *)track)->fourcc = (p[3] << 24) |
2228 (p[2] << 16) | (p[1] << 8) | p[0];
2229 codec_id = codec_get_bmp_id(((MatroskaVideoTrack *)track)->fourcc);
2233 /* This is the MS compatibility mode which stores a
2234 * WAVEFORMATEX in the CodecPrivate. */
2235 else if (!strcmp(track->codec_id,
2236 MATROSKA_CODEC_ID_AUDIO_ACM) &&
2237 (track->codec_priv_size >= 18) &&
2238 (track->codec_priv != NULL)) {
2242 /* Offset of wFormatTag. Stored in LE. */
2243 p = (unsigned char *)track->codec_priv;
2244 tag = (p[1] << 8) | p[0];
2245 codec_id = codec_get_wav_id(tag);
2249 else if (codec_id == CODEC_ID_AAC && !track->codec_priv_size) {
2250 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track;
2251 int profile = matroska_aac_profile(track->codec_id);
2252 int sri = matroska_aac_sri(audiotrack->internal_samplerate);
2253 extradata = av_malloc(5);
2254 if (extradata == NULL)
2255 return AVERROR_NOMEM;
2256 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
2257 extradata[1] = ((sri&0x01) << 7) | (audiotrack->channels<<3);
2258 if (strstr(track->codec_id, "SBR")) {
2259 sri = matroska_aac_sri(audiotrack->samplerate);
2260 extradata[2] = 0x56;
2261 extradata[3] = 0xE5;
2262 extradata[4] = 0x80 | (sri<<3);
2269 else if (codec_id == CODEC_ID_TTA) {
2270 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track;
2272 extradata_size = 30;
2273 extradata = av_mallocz(extradata_size);
2274 if (extradata == NULL)
2275 return AVERROR_NOMEM;
2276 init_put_byte(&b, extradata, extradata_size, 1,
2277 NULL, NULL, NULL, NULL);
2278 put_buffer(&b, (uint8_t *) "TTA1", 4);
2280 put_le16(&b, audiotrack->channels);
2281 put_le16(&b, audiotrack->bitdepth);
2282 put_le32(&b, audiotrack->samplerate);
2283 put_le32(&b, matroska->ctx->duration * audiotrack->samplerate);
2286 else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
2287 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
2288 extradata_offset = 26;
2289 track->codec_priv_size -= extradata_offset;
2290 track->flags |= MATROSKA_TRACK_REAL_V;
2293 if (codec_id == CODEC_ID_NONE) {
2294 av_log(matroska->ctx, AV_LOG_INFO,
2295 "Unknown/unsupported CodecID %s.\n",
2299 track->stream_index = matroska->num_streams;
2301 matroska->num_streams++;
2302 st = av_new_stream(s, track->stream_index);
2304 return AVERROR_NOMEM;
2305 av_set_pts_info(st, 64, matroska->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
2307 st->codec->codec_id = codec_id;
2309 if (track->default_duration)
2310 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
2311 track->default_duration, 1000000000, 30000);
2314 st->codec->extradata = extradata;
2315 st->codec->extradata_size = extradata_size;
2316 } else if(track->codec_priv && track->codec_priv_size > 0){
2317 st->codec->extradata = av_malloc(track->codec_priv_size);
2318 if(st->codec->extradata == NULL)
2319 return AVERROR_NOMEM;
2320 st->codec->extradata_size = track->codec_priv_size;
2321 memcpy(st->codec->extradata,track->codec_priv+extradata_offset,
2322 track->codec_priv_size);
2325 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2326 MatroskaVideoTrack *videotrack = (MatroskaVideoTrack *)track;
2328 st->codec->codec_type = CODEC_TYPE_VIDEO;
2329 st->codec->codec_tag = videotrack->fourcc;
2330 st->codec->width = videotrack->pixel_width;
2331 st->codec->height = videotrack->pixel_height;
2332 if (videotrack->display_width == 0)
2333 videotrack->display_width= videotrack->pixel_width;
2334 if (videotrack->display_height == 0)
2335 videotrack->display_height= videotrack->pixel_height;
2336 av_reduce(&st->codec->sample_aspect_ratio.num,
2337 &st->codec->sample_aspect_ratio.den,
2338 st->codec->height * videotrack->display_width,
2339 st->codec-> width * videotrack->display_height,
2341 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2342 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track;
2344 st->codec->codec_type = CODEC_TYPE_AUDIO;
2345 st->codec->sample_rate = audiotrack->samplerate;
2346 st->codec->channels = audiotrack->channels;
2347 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2348 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
2351 /* What do we do with private data? E.g. for Vorbis. */
2360 matroska_find_track_by_num (MatroskaDemuxContext *matroska,
2365 for (i = 0; i < matroska->num_tracks; i++)
2366 if (matroska->tracks[i]->num == num)
2373 rv_offset(uint8_t *data, int slice, int slices)
2375 return AV_RL32(data+8*slice+4) + 8*slices;
2379 matroska_parse_block(MatroskaDemuxContext *matroska, uint64_t cluster_time,
2380 int is_keyframe, int *ptrack, AVPacket **ppkt)
2386 uint8_t *data, *origdata;
2389 uint32_t *lace_size = NULL;
2390 int n, flags, laces = 0;
2392 int64_t pos= url_ftell(&matroska->ctx->pb);
2394 if ((res = ebml_read_binary(matroska, &id, &data, &size)) < 0)
2398 /* first byte(s): tracknum */
2399 if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) {
2400 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2407 /* fetch track from num */
2408 track = matroska_find_track_by_num(matroska, num);
2409 if (ptrack) *ptrack = track;
2410 if (size <= 3 || track < 0 || track >= matroska->num_tracks) {
2411 av_log(matroska->ctx, AV_LOG_INFO,
2412 "Invalid stream %d or size %u\n", track, size);
2416 if(matroska->ctx->streams[ matroska->tracks[track]->stream_index ]->discard >= AVDISCARD_ALL){
2421 /* block_time (relative to cluster time) */
2422 block_time = (data[0] << 8) | data[1];
2428 if (is_keyframe == -1)
2429 is_keyframe = flags & 1 ? PKT_FLAG_KEY : 0;
2430 switch ((flags & 0x06) >> 1) {
2431 case 0x0: /* no lacing */
2433 lace_size = av_mallocz(sizeof(int));
2434 lace_size[0] = size;
2437 case 0x1: /* xiph lacing */
2438 case 0x2: /* fixed-size lacing */
2439 case 0x3: /* EBML lacing */
2444 laces = (*data) + 1;
2447 lace_size = av_mallocz(laces * sizeof(int));
2449 switch ((flags & 0x06) >> 1) {
2450 case 0x1: /* xiph lacing */ {
2453 for (n = 0; res == 0 && n < laces - 1; n++) {
2460 lace_size[n] += temp;
2466 total += lace_size[n];
2468 lace_size[n] = size - total;
2472 case 0x2: /* fixed-size lacing */
2473 for (n = 0; n < laces; n++)
2474 lace_size[n] = size / laces;
2477 case 0x3: /* EBML lacing */ {
2479 n = matroska_ebmlnum_uint(data, size, &num);
2481 av_log(matroska->ctx, AV_LOG_INFO,
2482 "EBML block data error\n");
2487 total = lace_size[0] = num;
2488 for (n = 1; res == 0 && n < laces - 1; n++) {
2491 r = matroska_ebmlnum_sint (data, size, &snum);
2493 av_log(matroska->ctx, AV_LOG_INFO,
2494 "EBML block data error\n");
2499 lace_size[n] = lace_size[n - 1] + snum;
2500 total += lace_size[n];
2502 lace_size[n] = size - total;
2510 int real_v = matroska->tracks[track]->flags & MATROSKA_TRACK_REAL_V;
2511 for (n = 0; n < laces; n++) {
2512 uint64_t timecode = AV_NOPTS_VALUE;
2513 int slice, slices = 1;
2516 slices = *data++ + 1;
2519 if (cluster_time != (uint64_t)-1 && n == 0) {
2520 if (cluster_time + block_time >= 0)
2521 timecode = (cluster_time + block_time) * matroska->time_scale;
2523 /* FIXME: duration */
2525 for (slice=0; slice<slices; slice++) {
2526 int slice_size, slice_offset = 0;
2528 slice_offset = rv_offset(data, slice, slices);
2529 if (slice+1 == slices)
2530 slice_size = lace_size[n] - slice_offset;
2532 slice_size = rv_offset(data, slice+1, slices) - slice_offset;
2533 pkt = av_mallocz(sizeof(AVPacket));
2534 if (ppkt) *ppkt = pkt;
2535 /* XXX: prevent data copy... */
2536 if (av_new_packet(pkt, slice_size) < 0) {
2537 res = AVERROR_NOMEM;
2541 memcpy (pkt->data, data+slice_offset, slice_size);
2544 pkt->flags = is_keyframe;
2545 pkt->stream_index = matroska->tracks[track]->stream_index;
2547 pkt->pts = timecode;
2550 matroska_queue_packet(matroska, pkt);
2552 data += lace_size[n];
2562 matroska_parse_blockgroup (MatroskaDemuxContext *matroska,
2563 uint64_t cluster_time)
2567 AVPacket *pkt = NULL;
2568 int is_keyframe = PKT_FLAG_KEY, last_num_packets = matroska->num_packets;
2569 uint64_t duration = AV_NOPTS_VALUE;
2572 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing blockgroup...\n");
2575 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2578 } else if (matroska->level_up) {
2579 matroska->level_up--;
2584 /* one block inside the group. Note, block parsing is one
2585 * of the harder things, so this code is a bit complicated.
2586 * See http://www.matroska.org/ for documentation. */
2587 case MATROSKA_ID_BLOCK: {
2588 res = matroska_parse_block(matroska, cluster_time,
2589 is_keyframe, &track, &pkt);
2593 case MATROSKA_ID_BLOCKDURATION: {
2594 if ((res = ebml_read_uint(matroska, &id, &duration)) < 0)
2599 case MATROSKA_ID_BLOCKREFERENCE:
2600 /* We've found a reference, so not even the first frame in
2601 * the lace is a key frame. */
2603 if (last_num_packets != matroska->num_packets)
2604 matroska->packets[last_num_packets]->flags = 0;
2605 res = ebml_read_skip(matroska);
2609 av_log(matroska->ctx, AV_LOG_INFO,
2610 "Unknown entry 0x%x in blockgroup data\n", id);
2614 res = ebml_read_skip(matroska);
2618 if (matroska->level_up) {
2619 matroska->level_up--;
2626 if (duration != AV_NOPTS_VALUE)
2627 pkt->duration = duration;
2628 else if (track >= 0 && track < matroska->num_tracks)
2629 pkt->duration = matroska->tracks[track]->default_duration / matroska->time_scale;
2636 matroska_parse_cluster (MatroskaDemuxContext *matroska)
2640 uint64_t cluster_time = 0;
2642 av_log(matroska->ctx, AV_LOG_DEBUG,
2643 "parsing cluster at %"PRId64"\n", url_ftell(&matroska->ctx->pb));
2646 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2649 } else if (matroska->level_up) {
2650 matroska->level_up--;
2655 /* cluster timecode */
2656 case MATROSKA_ID_CLUSTERTIMECODE: {
2658 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
2664 /* a group of blocks inside a cluster */
2665 case MATROSKA_ID_BLOCKGROUP:
2666 if ((res = ebml_read_master(matroska, &id)) < 0)
2668 res = matroska_parse_blockgroup(matroska, cluster_time);
2671 case MATROSKA_ID_SIMPLEBLOCK:
2672 matroska_parse_block(matroska, cluster_time, -1, NULL, NULL);
2676 av_log(matroska->ctx, AV_LOG_INFO,
2677 "Unknown entry 0x%x in cluster data\n", id);
2681 res = ebml_read_skip(matroska);
2685 if (matroska->level_up) {
2686 matroska->level_up--;
2695 matroska_read_packet (AVFormatContext *s,
2698 MatroskaDemuxContext *matroska = s->priv_data;
2702 /* Do we still have a packet queued? */
2703 if (matroska_deliver_packet(matroska, pkt) == 0)
2706 /* Have we already reached the end? */
2711 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2714 } else if (matroska->level_up) {
2715 matroska->level_up--;
2720 case MATROSKA_ID_CLUSTER:
2721 if ((res = ebml_read_master(matroska, &id)) < 0)
2723 if ((res = matroska_parse_cluster(matroska)) == 0)
2724 res = 1; /* Parsed one cluster, let's get out. */
2729 res = ebml_read_skip(matroska);
2733 if (matroska->level_up) {
2734 matroska->level_up--;
2742 return matroska_deliver_packet(matroska, pkt);
2746 matroska_read_close (AVFormatContext *s)
2748 MatroskaDemuxContext *matroska = s->priv_data;
2751 av_free(matroska->writing_app);
2752 av_free(matroska->muxing_app);
2753 av_free(matroska->index);
2755 if (matroska->packets != NULL) {
2756 for (n = 0; n < matroska->num_packets; n++) {
2757 av_free_packet(matroska->packets[n]);
2758 av_free(matroska->packets[n]);
2760 av_free(matroska->packets);
2763 for (n = 0; n < matroska->num_tracks; n++) {
2764 MatroskaTrack *track = matroska->tracks[n];
2765 av_free(track->codec_id);
2766 av_free(track->codec_name);
2767 av_free(track->codec_priv);
2768 av_free(track->name);
2769 av_free(track->language);
2777 AVInputFormat matroska_demuxer = {
2779 "Matroska file format",
2780 sizeof(MatroskaDemuxContext),
2782 matroska_read_header,
2783 matroska_read_packet,
2784 matroska_read_close,