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,
added
removed
ffmpeg/libavformat/matroska.c
