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Mark formats requiring external libs with an 'E' in the format support tables.
[FFMpeg-mirror/ffmpeg-vdpau.git] / libavformat / matroskadec.c
blobcedfb3d20d33870a576052e2222dfc3248948204
1 /*
2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file matroskadec.c
24 * Matroska file demuxer
25 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * Specs available on the Matroska project page: http://www.matroska.org/.
29 */
30
31 #include <stdio.h>
32 #include "avformat.h"
33 /* For codec_get_id(). */
34 #include "riff.h"
35 #include "isom.h"
36 #include "matroska.h"
37 #include "libavcodec/mpeg4audio.h"
38 #include "libavutil/intfloat_readwrite.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/lzo.h"
41 #ifdef CONFIG_ZLIB
42 #include <zlib.h>
43 #endif
44 #ifdef CONFIG_BZLIB
45 #include <bzlib.h>
46 #endif
47
48 typedef enum {
49 EBML_NONE,
50 EBML_UINT,
51 EBML_FLOAT,
52 EBML_STR,
53 EBML_UTF8,
54 EBML_BIN,
55 EBML_NEST,
56 EBML_PASS,
57 EBML_STOP,
58 } EbmlType;
59
60 typedef const struct EbmlSyntax {
61 uint32_t id;
62 EbmlType type;
63 int list_elem_size;
64 int data_offset;
65 union {
66 uint64_t u;
67 double f;
68 const char *s;
69 const struct EbmlSyntax *n;
70 } def;
71 } EbmlSyntax;
72
73 typedef struct {
74 int nb_elem;
75 void *elem;
76 } EbmlList;
77
78 typedef struct {
79 int size;
80 uint8_t *data;
81 int64_t pos;
82 } EbmlBin;
83
84 typedef struct {
85 uint64_t version;
86 uint64_t max_size;
87 uint64_t id_length;
88 char *doctype;
89 uint64_t doctype_version;
90 } Ebml;
91
92 typedef struct {
93 uint64_t algo;
94 EbmlBin settings;
95 } MatroskaTrackCompression;
96
97 typedef struct {
98 uint64_t scope;
99 uint64_t type;
100 MatroskaTrackCompression compression;
101 } MatroskaTrackEncoding;
102
103 typedef struct {
104 double frame_rate;
105 uint64_t display_width;
106 uint64_t display_height;
107 uint64_t pixel_width;
108 uint64_t pixel_height;
109 uint64_t fourcc;
110 } MatroskaTrackVideo;
111
112 typedef struct {
113 double samplerate;
114 double out_samplerate;
115 uint64_t bitdepth;
116 uint64_t channels;
117
118 /* real audio header (extracted from extradata) */
119 int coded_framesize;
120 int sub_packet_h;
121 int frame_size;
122 int sub_packet_size;
123 int sub_packet_cnt;
124 int pkt_cnt;
125 uint8_t *buf;
126 } MatroskaTrackAudio;
127
128 typedef struct {
129 uint64_t num;
130 uint64_t type;
131 char *codec_id;
132 EbmlBin codec_priv;
133 char *language;
134 double time_scale;
135 uint64_t default_duration;
136 uint64_t flag_default;
137 MatroskaTrackVideo video;
138 MatroskaTrackAudio audio;
139 EbmlList encodings;
140
141 AVStream *stream;
142 int64_t end_timecode;
143 } MatroskaTrack;
144
145 typedef struct {
146 char *filename;
147 char *mime;
148 EbmlBin bin;
149 } MatroskaAttachement;
150
151 typedef struct {
152 uint64_t start;
153 uint64_t end;
154 uint64_t uid;
155 char *title;
156 } MatroskaChapter;
157
158 typedef struct {
159 uint64_t track;
160 uint64_t pos;
161 } MatroskaIndexPos;
162
163 typedef struct {
164 uint64_t time;
165 EbmlList pos;
166 } MatroskaIndex;
167
168 typedef struct {
169 char *name;
170 char *string;
171 EbmlList sub;
172 } MatroskaTag;
173
174 typedef struct {
175 uint64_t id;
176 uint64_t pos;
177 } MatroskaSeekhead;
178
179 typedef struct {
180 uint64_t start;
181 uint64_t length;
182 } MatroskaLevel;
183
184 typedef struct {
185 AVFormatContext *ctx;
186
187 /* EBML stuff */
188 int num_levels;
189 MatroskaLevel levels[EBML_MAX_DEPTH];
190 int level_up;
191
192 uint64_t time_scale;
193 double duration;
194 char *title;
195 EbmlList tracks;
196 EbmlList attachments;
197 EbmlList chapters;
198 EbmlList index;
199 EbmlList tags;
200 EbmlList seekhead;
201
202 /* byte position of the segment inside the stream */
203 int64_t segment_start;
204
205 /* the packet queue */
206 AVPacket **packets;
207 int num_packets;
208 AVPacket *prev_pkt;
209
210 int done;
211 int has_cluster_id;
212
213 /* What to skip before effectively reading a packet. */
214 int skip_to_keyframe;
215 uint64_t skip_to_timecode;
216 } MatroskaDemuxContext;
217
218 typedef struct {
219 uint64_t duration;
220 int64_t reference;
221 EbmlBin bin;
222 } MatroskaBlock;
223
224 typedef struct {
225 uint64_t timecode;
226 EbmlList blocks;
227 } MatroskaCluster;
228
229 static EbmlSyntax ebml_header[] = {
230 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
231 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
232 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
233 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
234 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
235 { EBML_ID_EBMLVERSION, EBML_NONE },
236 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
237 { 0 }
238 };
239
240 static EbmlSyntax ebml_syntax[] = {
241 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
242 { 0 }
243 };
244
245 static EbmlSyntax matroska_info[] = {
246 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
247 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
248 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
249 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
250 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
251 { MATROSKA_ID_DATEUTC, EBML_NONE },
252 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
253 { 0 }
254 };
255
256 static EbmlSyntax matroska_track_video[] = {
257 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
258 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
259 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
260 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
261 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
262 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
263 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
264 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
265 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
266 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
267 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
268 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
269 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
270 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
271 { 0 }
272 };
273
274 static EbmlSyntax matroska_track_audio[] = {
275 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
276 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
277 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
278 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
279 { 0 }
280 };
281
282 static EbmlSyntax matroska_track_encoding_compression[] = {
283 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
284 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
285 { 0 }
286 };
287
288 static EbmlSyntax matroska_track_encoding[] = {
289 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
290 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
291 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
292 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
293 { 0 }
294 };
295
296 static EbmlSyntax matroska_track_encodings[] = {
297 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
298 { 0 }
299 };
300
301 static EbmlSyntax matroska_track[] = {
302 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
303 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
304 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
305 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
306 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
307 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
308 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
309 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
310 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
311 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
312 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
313 { MATROSKA_ID_TRACKUID, EBML_NONE },
314 { MATROSKA_ID_TRACKNAME, EBML_NONE },
315 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
316 { MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE },
317 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
318 { MATROSKA_ID_CODECNAME, EBML_NONE },
319 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
320 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
321 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
322 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
323 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
324 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
325 { 0 }
326 };
327
328 static EbmlSyntax matroska_tracks[] = {
329 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
330 { 0 }
331 };
332
333 static EbmlSyntax matroska_attachment[] = {
334 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
335 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
336 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
337 { MATROSKA_ID_FILEDESC, EBML_NONE },
338 { MATROSKA_ID_FILEUID, EBML_NONE },
339 { 0 }
340 };
341
342 static EbmlSyntax matroska_attachments[] = {
343 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
344 { 0 }
345 };
346
347 static EbmlSyntax matroska_chapter_display[] = {
348 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
349 { MATROSKA_ID_CHAPLANG, EBML_NONE },
350 { 0 }
351 };
352
353 static EbmlSyntax matroska_chapter_entry[] = {
354 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
355 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
356 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
357 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
358 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
359 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
360 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
361 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
362 { 0 }
363 };
364
365 static EbmlSyntax matroska_chapter[] = {
366 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
367 { MATROSKA_ID_EDITIONUID, EBML_NONE },
368 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
369 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
370 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
371 { 0 }
372 };
373
374 static EbmlSyntax matroska_chapters[] = {
375 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
376 { 0 }
377 };
378
379 static EbmlSyntax matroska_index_pos[] = {
380 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
381 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
382 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
383 { 0 }
384 };
385
386 static EbmlSyntax matroska_index_entry[] = {
387 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
388 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
389 { 0 }
390 };
391
392 static EbmlSyntax matroska_index[] = {
393 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
394 { 0 }
395 };
396
397 static EbmlSyntax matroska_simpletag[] = {
398 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
399 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
400 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
401 { MATROSKA_ID_TAGLANG, EBML_NONE },
402 { MATROSKA_ID_TAGDEFAULT, EBML_NONE },
403 { 0 }
404 };
405
406 static EbmlSyntax matroska_tag[] = {
407 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), 0, {.n=matroska_simpletag} },
408 { MATROSKA_ID_TAGTARGETS, EBML_NONE },
409 { 0 }
410 };
411
412 static EbmlSyntax matroska_tags[] = {
413 { MATROSKA_ID_TAG, EBML_NEST, 0, offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
414 { 0 }
415 };
416
417 static EbmlSyntax matroska_seekhead_entry[] = {
418 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
419 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
420 { 0 }
421 };
422
423 static EbmlSyntax matroska_seekhead[] = {
424 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
425 { 0 }
426 };
427
428 static EbmlSyntax matroska_segment[] = {
429 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
430 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
431 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
432 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
433 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
434 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
435 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
436 { MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) },
437 { 0 }
438 };
439
440 static EbmlSyntax matroska_segments[] = {
441 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
442 { 0 }
443 };
444
445 static EbmlSyntax matroska_blockgroup[] = {
446 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
447 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
448 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
449 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
450 { 0 }
451 };
452
453 static EbmlSyntax matroska_cluster[] = {
454 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
455 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
456 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
457 { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
458 { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
459 { 0 }
460 };
461
462 static EbmlSyntax matroska_clusters[] = {
463 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
464 { MATROSKA_ID_INFO, EBML_NONE },
465 { MATROSKA_ID_CUES, EBML_NONE },
466 { MATROSKA_ID_TAGS, EBML_NONE },
467 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
468 { 0 }
469 };
470
471 #define SIZE_OFF(x) sizeof(((AVFormatContext*)0)->x),offsetof(AVFormatContext,x)
472 const struct {
473 const char name[16];
474 int size;
475 int offset;
476 } metadata[] = {
477 { "TITLE", SIZE_OFF(title) },
478 { "ARTIST", SIZE_OFF(author) },
479 { "WRITTEN_BY", SIZE_OFF(author) },
480 { "LEAD_PERFORMER", SIZE_OFF(author) },
481 { "COPYRIGHT", SIZE_OFF(copyright) },
482 { "COMMENT", SIZE_OFF(comment) },
483 { "ALBUM", SIZE_OFF(album) },
484 { "DATE_WRITTEN", SIZE_OFF(year) },
485 { "DATE_RELEASED", SIZE_OFF(year) },
486 { "PART_NUMBER", SIZE_OFF(track) },
487 { "GENRE", SIZE_OFF(genre) },
488 };
489
490 /*
491 * Return: Whether we reached the end of a level in the hierarchy or not.
492 */
493 static int ebml_level_end(MatroskaDemuxContext *matroska)
494 {
495 ByteIOContext *pb = matroska->ctx->pb;
496 int64_t pos = url_ftell(pb);
497
498 if (matroska->num_levels > 0) {
499 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
500 if (pos - level->start >= level->length) {
501 matroska->num_levels--;
502 return 1;
503 }
504 }
505 return 0;
506 }
507
508 /*
509 * Read: an "EBML number", which is defined as a variable-length
510 * array of bytes. The first byte indicates the length by giving a
511 * number of 0-bits followed by a one. The position of the first
512 * "one" bit inside the first byte indicates the length of this
513 * number.
514 * Returns: number of bytes read, < 0 on error
515 */
516 static int ebml_read_num(MatroskaDemuxContext *matroska, ByteIOContext *pb,
517 int max_size, uint64_t *number)
518 {
519 int len_mask = 0x80, read = 1, n = 1;
520 int64_t total = 0;
521
522 /* The first byte tells us the length in bytes - get_byte() can normally
523 * return 0, but since that's not a valid first ebmlID byte, we can
524 * use it safely here to catch EOS. */
525 if (!(total = get_byte(pb))) {
526 /* we might encounter EOS here */
527 if (!url_feof(pb)) {
528 int64_t pos = url_ftell(pb);
529 av_log(matroska->ctx, AV_LOG_ERROR,
530 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
531 pos, pos);
532 }
533 return AVERROR(EIO); /* EOS or actual I/O error */
534 }
535
536 /* get the length of the EBML number */
537 while (read <= max_size && !(total & len_mask)) {
538 read++;
539 len_mask >>= 1;
540 }
541 if (read > max_size) {
542 int64_t pos = url_ftell(pb) - 1;
543 av_log(matroska->ctx, AV_LOG_ERROR,
544 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
545 (uint8_t) total, pos, pos);
546 return AVERROR_INVALIDDATA;
547 }
548
549 /* read out length */
550 total &= ~len_mask;
551 while (n++ < read)
552 total = (total << 8) | get_byte(pb);
553
554 *number = total;
555
556 return read;
557 }
558
559 /*
560 * Read the next element as an unsigned int.
561 * 0 is success, < 0 is failure.
562 */
563 static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num)
564 {
565 int n = 0;
566
567 if (size < 1 || size > 8)
568 return AVERROR_INVALIDDATA;
569
570 /* big-endian ordering; build up number */
571 *num = 0;
572 while (n++ < size)
573 *num = (*num << 8) | get_byte(pb);
574
575 return 0;
576 }
577
578 /*
579 * Read the next element as a float.
580 * 0 is success, < 0 is failure.
581 */
582 static int ebml_read_float(ByteIOContext *pb, int size, double *num)
583 {
584 if (size == 4) {
585 *num= av_int2flt(get_be32(pb));
586 } else if(size==8){
587 *num= av_int2dbl(get_be64(pb));
588 } else
589 return AVERROR_INVALIDDATA;
590
591 return 0;
592 }
593
594 /*
595 * Read the next element as an ASCII string.
596 * 0 is success, < 0 is failure.
597 */
598 static int ebml_read_ascii(ByteIOContext *pb, int size, char **str)
599 {
600 av_free(*str);
601 /* EBML strings are usually not 0-terminated, so we allocate one
602 * byte more, read the string and NULL-terminate it ourselves. */
603 if (!(*str = av_malloc(size + 1)))
604 return AVERROR(ENOMEM);
605 if (get_buffer(pb, (uint8_t *) *str, size) != size) {
606 av_free(*str);
607 return AVERROR(EIO);
608 }
609 (*str)[size] = '\0';
610
611 return 0;
612 }
613
614 /*
615 * Read the next element as binary data.
616 * 0 is success, < 0 is failure.
617 */
618 static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin)
619 {
620 av_free(bin->data);
621 if (!(bin->data = av_malloc(length)))
622 return AVERROR(ENOMEM);
623
624 bin->size = length;
625 bin->pos = url_ftell(pb);
626 if (get_buffer(pb, bin->data, length) != length)
627 return AVERROR(EIO);
628
629 return 0;
630 }
631
632 /*
633 * Read the next element, but only the header. The contents
634 * are supposed to be sub-elements which can be read separately.
635 * 0 is success, < 0 is failure.
636 */
637 static int ebml_read_master(MatroskaDemuxContext *matroska, int length)
638 {
639 ByteIOContext *pb = matroska->ctx->pb;
640 MatroskaLevel *level;
641
642 if (matroska->num_levels >= EBML_MAX_DEPTH) {
643 av_log(matroska->ctx, AV_LOG_ERROR,
644 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
645 return AVERROR(ENOSYS);
646 }
647
648 level = &matroska->levels[matroska->num_levels++];
649 level->start = url_ftell(pb);
650 level->length = length;
651
652 return 0;
653 }
654
655 /*
656 * Read signed/unsigned "EBML" numbers.
657 * Return: number of bytes processed, < 0 on error
658 */
659 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
660 uint8_t *data, uint32_t size, uint64_t *num)
661 {
662 ByteIOContext pb;
663 init_put_byte(&pb, data, size, 0, NULL, NULL, NULL, NULL);
664 return ebml_read_num(matroska, &pb, 8, num);
665 }
666
667 /*
668 * Same as above, but signed.
669 */
670 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
671 uint8_t *data, uint32_t size, int64_t *num)
672 {
673 uint64_t unum;
674 int res;
675
676 /* read as unsigned number first */
677 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
678 return res;
679
680 /* make signed (weird way) */
681 *num = unum - ((1LL << (7*res - 1)) - 1);
682
683 return res;
684 }
685
686 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
687 EbmlSyntax *syntax, void *data);
688
689 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
690 uint32_t id, void *data)
691 {
692 int i;
693 for (i=0; syntax[i].id; i++)
694 if (id == syntax[i].id)
695 break;
696 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
697 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
698 return ebml_parse_elem(matroska, &syntax[i], data);
699 }
700
701 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
702 void *data)
703 {
704 uint64_t id;
705 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
706 id |= 1 << 7*res;
707 return res < 0 ? res : ebml_parse_id(matroska, syntax, id, data);
708 }
709
710 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
711 void *data)
712 {
713 int i, res = 0;
714
715 for (i=0; syntax[i].id; i++)
716 switch (syntax[i].type) {
717 case EBML_UINT:
718 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
719 break;
720 case EBML_FLOAT:
721 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
722 break;
723 case EBML_STR:
724 case EBML_UTF8:
725 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
726 break;
727 }
728
729 while (!res && !ebml_level_end(matroska))
730 res = ebml_parse(matroska, syntax, data);
731
732 return res;
733 }
734
735 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
736 EbmlSyntax *syntax, void *data)
737 {
738 ByteIOContext *pb = matroska->ctx->pb;
739 uint32_t id = syntax->id;
740 uint64_t length;
741 int res;
742
743 data = (char *)data + syntax->data_offset;
744 if (syntax->list_elem_size) {
745 EbmlList *list = data;
746 list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
747 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
748 memset(data, 0, syntax->list_elem_size);
749 list->nb_elem++;
750 }
751
752 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP)
753 if ((res = ebml_read_num(matroska, pb, 8, &length)) < 0)
754 return res;
755
756 switch (syntax->type) {
757 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
758 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
759 case EBML_STR:
760 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
761 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
762 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
763 return res;
764 if (id == MATROSKA_ID_SEGMENT)
765 matroska->segment_start = url_ftell(matroska->ctx->pb);
766 return ebml_parse_nest(matroska, syntax->def.n, data);
767 case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
768 case EBML_STOP: *(int *)data = 1; return 1;
769 default: return url_fseek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0;
770 }
771 if (res == AVERROR_INVALIDDATA)
772 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
773 else if (res == AVERROR(EIO))
774 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
775 return res;
776 }
777
778 static void ebml_free(EbmlSyntax *syntax, void *data)
779 {
780 int i, j;
781 for (i=0; syntax[i].id; i++) {
782 void *data_off = (char *)data + syntax[i].data_offset;
783 switch (syntax[i].type) {
784 case EBML_STR:
785 case EBML_UTF8: av_freep(data_off); break;
786 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
787 case EBML_NEST:
788 if (syntax[i].list_elem_size) {
789 EbmlList *list = data_off;
790 char *ptr = list->elem;
791 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
792 ebml_free(syntax[i].def.n, ptr);
793 av_free(list->elem);
794 } else
795 ebml_free(syntax[i].def.n, data_off);
796 default: break;
797 }
798 }
799 }
800
801
802 /*
803 * Autodetecting...
804 */
805 static int matroska_probe(AVProbeData *p)
806 {
807 uint64_t total = 0;
808 int len_mask = 0x80, size = 1, n = 1;
809 static const char probe_data[] = "matroska";
810
811 /* EBML header? */
812 if (AV_RB32(p->buf) != EBML_ID_HEADER)
813 return 0;
814
815 /* length of header */
816 total = p->buf[4];
817 while (size <= 8 && !(total & len_mask)) {
818 size++;
819 len_mask >>= 1;
820 }
821 if (size > 8)
822 return 0;
823 total &= (len_mask - 1);
824 while (n < size)
825 total = (total << 8) | p->buf[4 + n++];
826
827 /* Does the probe data contain the whole header? */
828 if (p->buf_size < 4 + size + total)
829 return 0;
830
831 /* The header must contain the document type 'matroska'. For now,
832 * we don't parse the whole header but simply check for the
833 * availability of that array of characters inside the header.
834 * Not fully fool-proof, but good enough. */
835 for (n = 4+size; n <= 4+size+total-(sizeof(probe_data)-1); n++)
836 if (!memcmp(p->buf+n, probe_data, sizeof(probe_data)-1))
837 return AVPROBE_SCORE_MAX;
838
839 return 0;
840 }
841
842 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
843 int num)
844 {
845 MatroskaTrack *tracks = matroska->tracks.elem;
846 int i;
847
848 for (i=0; i < matroska->tracks.nb_elem; i++)
849 if (tracks[i].num == num)
850 return &tracks[i];
851
852 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
853 return NULL;
854 }
855
856 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
857 MatroskaTrack *track)
858 {
859 MatroskaTrackEncoding *encodings = track->encodings.elem;
860 uint8_t* data = *buf;
861 int isize = *buf_size;
862 uint8_t* pkt_data = NULL;
863 int pkt_size = isize;
864 int result = 0;
865 int olen;
866
867 switch (encodings[0].compression.algo) {
868 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
869 return encodings[0].compression.settings.size;
870 case MATROSKA_TRACK_ENCODING_COMP_LZO:
871 do {
872 olen = pkt_size *= 3;
873 pkt_data = av_realloc(pkt_data,
874 pkt_size+LZO_OUTPUT_PADDING);
875 result = lzo1x_decode(pkt_data, &olen, data, &isize);
876 } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
877 if (result)
878 goto failed;
879 pkt_size -= olen;
880 break;
881 #ifdef CONFIG_ZLIB
882 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
883 z_stream zstream = {0};
884 if (inflateInit(&zstream) != Z_OK)
885 return -1;
886 zstream.next_in = data;
887 zstream.avail_in = isize;
888 do {
889 pkt_size *= 3;
890 pkt_data = av_realloc(pkt_data, pkt_size);
891 zstream.avail_out = pkt_size - zstream.total_out;
892 zstream.next_out = pkt_data + zstream.total_out;
893 result = inflate(&zstream, Z_NO_FLUSH);
894 } while (result==Z_OK && pkt_size<10000000);
895 pkt_size = zstream.total_out;
896 inflateEnd(&zstream);
897 if (result != Z_STREAM_END)
898 goto failed;
899 break;
900 }
901 #endif
902 #ifdef CONFIG_BZLIB
903 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
904 bz_stream bzstream = {0};
905 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
906 return -1;
907 bzstream.next_in = data;
908 bzstream.avail_in = isize;
909 do {
910 pkt_size *= 3;
911 pkt_data = av_realloc(pkt_data, pkt_size);
912 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
913 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
914 result = BZ2_bzDecompress(&bzstream);
915 } while (result==BZ_OK && pkt_size<10000000);
916 pkt_size = bzstream.total_out_lo32;
917 BZ2_bzDecompressEnd(&bzstream);
918 if (result != BZ_STREAM_END)
919 goto failed;
920 break;
921 }
922 #endif
923 default:
924 return -1;
925 }
926
927 *buf = pkt_data;
928 *buf_size = pkt_size;
929 return 0;
930 failed:
931 av_free(pkt_data);
932 return -1;
933 }
934
935 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
936 AVPacket *pkt, uint64_t display_duration)
937 {
938 char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
939 for (; *ptr!=',' && ptr<end-1; ptr++);
940 if (*ptr == ',')
941 layer = ++ptr;
942 for (; *ptr!=',' && ptr<end-1; ptr++);
943 if (*ptr == ',') {
944 int64_t end_pts = pkt->pts + display_duration;
945 int sc = matroska->time_scale * pkt->pts / 10000000;
946 int ec = matroska->time_scale * end_pts / 10000000;
947 int sh, sm, ss, eh, em, es, len;
948 sh = sc/360000; sc -= 360000*sh;
949 sm = sc/ 6000; sc -= 6000*sm;
950 ss = sc/ 100; sc -= 100*ss;
951 eh = ec/360000; ec -= 360000*eh;
952 em = ec/ 6000; ec -= 6000*em;
953 es = ec/ 100; ec -= 100*es;
954 *ptr++ = '\0';
955 len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
956 if (!(line = av_malloc(len)))
957 return;
958 snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
959 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
960 av_free(pkt->data);
961 pkt->data = line;
962 pkt->size = strlen(line);
963 }
964 }
965
966 static void matroska_merge_packets(AVPacket *out, AVPacket *in)
967 {
968 out->data = av_realloc(out->data, out->size+in->size);
969 memcpy(out->data+out->size, in->data, in->size);
970 out->size += in->size;
971 av_destruct_packet(in);
972 av_free(in);
973 }
974
975 static void matroska_convert_tags(AVFormatContext *s, EbmlList *list)
976 {
977 MatroskaTag *tags = list->elem;
978 int i, j;
979
980 for (i=0; i < list->nb_elem; i++) {
981 for (j=0; j < FF_ARRAY_ELEMS(metadata); j++){
982 if (!strcmp(tags[i].name, metadata[j].name)) {
983 int *ptr = (int *)((char *)s + metadata[j].offset);
984 if (*ptr) continue;
985 if (metadata[j].size > sizeof(int))
986 av_strlcpy((char *)ptr, tags[i].string, metadata[j].size);
987 else
988 *ptr = atoi(tags[i].string);
989 }
990 }
991 if (tags[i].sub.nb_elem)
992 matroska_convert_tags(s, &tags[i].sub);
993 }
994 }
995
996 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
997 {
998 EbmlList *seekhead_list = &matroska->seekhead;
999 MatroskaSeekhead *seekhead = seekhead_list->elem;
1000 uint32_t level_up = matroska->level_up;
1001 int64_t before_pos = url_ftell(matroska->ctx->pb);
1002 MatroskaLevel level;
1003 int i;
1004
1005 for (i=0; i<seekhead_list->nb_elem; i++) {
1006 int64_t offset = seekhead[i].pos + matroska->segment_start;
1007
1008 if (seekhead[i].pos <= before_pos
1009 || seekhead[i].id == MATROSKA_ID_SEEKHEAD
1010 || seekhead[i].id == MATROSKA_ID_CLUSTER)
1011 continue;
1012
1013 /* seek */
1014 if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset)
1015 continue;
1016
1017 /* We don't want to lose our seekhead level, so we add
1018 * a dummy. This is a crude hack. */
1019 if (matroska->num_levels == EBML_MAX_DEPTH) {
1020 av_log(matroska->ctx, AV_LOG_INFO,
1021 "Max EBML element depth (%d) reached, "
1022 "cannot parse further.\n", EBML_MAX_DEPTH);
1023 break;
1024 }
1025
1026 level.start = 0;
1027 level.length = (uint64_t)-1;
1028 matroska->levels[matroska->num_levels] = level;
1029 matroska->num_levels++;
1030
1031 ebml_parse(matroska, matroska_segment, matroska);
1032
1033 /* remove dummy level */
1034 while (matroska->num_levels) {
1035 uint64_t length = matroska->levels[--matroska->num_levels].length;
1036 if (length == (uint64_t)-1)
1037 break;
1038 }
1039 }
1040
1041 /* seek back */
1042 url_fseek(matroska->ctx->pb, before_pos, SEEK_SET);
1043 matroska->level_up = level_up;
1044 }
1045
1046 static int matroska_aac_profile(char *codec_id)
1047 {
1048 static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
1049 int profile;
1050
1051 for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
1052 if (strstr(codec_id, aac_profiles[profile]))
1053 break;
1054 return profile + 1;
1055 }
1056
1057 static int matroska_aac_sri(int samplerate)
1058 {
1059 int sri;
1060
1061 for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
1062 if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1063 break;
1064 return sri;
1065 }
1066
1067 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1068 {
1069 MatroskaDemuxContext *matroska = s->priv_data;
1070 EbmlList *attachements_list = &matroska->attachments;
1071 MatroskaAttachement *attachements;
1072 EbmlList *chapters_list = &matroska->chapters;
1073 MatroskaChapter *chapters;
1074 MatroskaTrack *tracks;
1075 EbmlList *index_list;
1076 MatroskaIndex *index;
1077 Ebml ebml = { 0 };
1078 AVStream *st;
1079 int i, j;
1080
1081 matroska->ctx = s;
1082
1083 /* First read the EBML header. */
1084 if (ebml_parse(matroska, ebml_syntax, &ebml)
1085 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1086 || ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska")
1087 || ebml.doctype_version > 2) {
1088 av_log(matroska->ctx, AV_LOG_ERROR,
1089 "EBML header using unsupported features\n"
1090 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1091 ebml.version, ebml.doctype, ebml.doctype_version);
1092 return AVERROR_NOFMT;
1093 }
1094 ebml_free(ebml_syntax, &ebml);
1095
1096 /* The next thing is a segment. */
1097 if (ebml_parse(matroska, matroska_segments, matroska) < 0)
1098 return -1;
1099 matroska_execute_seekhead(matroska);
1100
1101 if (matroska->duration)
1102 matroska->ctx->duration = matroska->duration * matroska->time_scale
1103 * 1000 / AV_TIME_BASE;
1104 if (matroska->title)
1105 strncpy(matroska->ctx->title, matroska->title,
1106 sizeof(matroska->ctx->title)-1);
1107 matroska_convert_tags(s, &matroska->tags);
1108
1109 tracks = matroska->tracks.elem;
1110 for (i=0; i < matroska->tracks.nb_elem; i++) {
1111 MatroskaTrack *track = &tracks[i];
1112 enum CodecID codec_id = CODEC_ID_NONE;
1113 EbmlList *encodings_list = &tracks->encodings;
1114 MatroskaTrackEncoding *encodings = encodings_list->elem;
1115 uint8_t *extradata = NULL;
1116 int extradata_size = 0;
1117 int extradata_offset = 0;
1118
1119 /* Apply some sanity checks. */
1120 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1121 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1122 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1123 av_log(matroska->ctx, AV_LOG_INFO,
1124 "Unknown or unsupported track type %"PRIu64"\n",
1125 track->type);
1126 continue;
1127 }
1128 if (track->codec_id == NULL)
1129 continue;
1130
1131 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1132 if (!track->default_duration)
1133 track->default_duration = 1000000000/track->video.frame_rate;
1134 if (!track->video.display_width)
1135 track->video.display_width = track->video.pixel_width;
1136 if (!track->video.display_height)
1137 track->video.display_height = track->video.pixel_height;
1138 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1139 if (!track->audio.out_samplerate)
1140 track->audio.out_samplerate = track->audio.samplerate;
1141 }
1142 if (encodings_list->nb_elem > 1) {
1143 av_log(matroska->ctx, AV_LOG_ERROR,
1144 "Multiple combined encodings no supported");
1145 } else if (encodings_list->nb_elem == 1) {
1146 if (encodings[0].type ||
1147 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1148 #ifdef CONFIG_ZLIB
1149 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1150 #endif
1151 #ifdef CONFIG_BZLIB
1152 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1153 #endif
1154 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1155 encodings[0].scope = 0;
1156 av_log(matroska->ctx, AV_LOG_ERROR,
1157 "Unsupported encoding type");
1158 } else if (track->codec_priv.size && encodings[0].scope&2) {
1159 uint8_t *codec_priv = track->codec_priv.data;
1160 int offset = matroska_decode_buffer(&track->codec_priv.data,
1161 &track->codec_priv.size,
1162 track);
1163 if (offset < 0) {
1164 track->codec_priv.data = NULL;
1165 track->codec_priv.size = 0;
1166 av_log(matroska->ctx, AV_LOG_ERROR,
1167 "Failed to decode codec private data\n");
1168 } else if (offset > 0) {
1169 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1170 memcpy(track->codec_priv.data,
1171 encodings[0].compression.settings.data, offset);
1172 memcpy(track->codec_priv.data+offset, codec_priv,
1173 track->codec_priv.size);
1174 track->codec_priv.size += offset;
1175 }
1176 if (codec_priv != track->codec_priv.data)
1177 av_free(codec_priv);
1178 }
1179 }
1180
1181 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1182 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1183 strlen(ff_mkv_codec_tags[j].str))){
1184 codec_id= ff_mkv_codec_tags[j].id;
1185 break;
1186 }
1187 }
1188
1189 st = track->stream = av_new_stream(s, 0);
1190 if (st == NULL)
1191 return AVERROR(ENOMEM);
1192
1193 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1194 && track->codec_priv.size >= 40
1195 && track->codec_priv.data != NULL) {
1196 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1197 codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc);
1198 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1199 && track->codec_priv.size >= 18
1200 && track->codec_priv.data != NULL) {
1201 uint16_t tag = AV_RL16(track->codec_priv.data);
1202 codec_id = codec_get_id(codec_wav_tags, tag);
1203 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1204 && (track->codec_priv.size >= 86)
1205 && (track->codec_priv.data != NULL)) {
1206 track->video.fourcc = AV_RL32(track->codec_priv.data);
1207 codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc);
1208 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1209 switch (track->audio.bitdepth) {
1210 case 8: codec_id = CODEC_ID_PCM_U8; break;
1211 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1212 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1213 }
1214 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1215 switch (track->audio.bitdepth) {
1216 case 8: codec_id = CODEC_ID_PCM_U8; break;
1217 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1218 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1219 }
1220 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1221 codec_id = CODEC_ID_PCM_F64LE;
1222 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1223 int profile = matroska_aac_profile(track->codec_id);
1224 int sri = matroska_aac_sri(track->audio.samplerate);
1225 extradata = av_malloc(5);
1226 if (extradata == NULL)
1227 return AVERROR(ENOMEM);
1228 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1229 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1230 if (strstr(track->codec_id, "SBR")) {
1231 sri = matroska_aac_sri(track->audio.out_samplerate);
1232 extradata[2] = 0x56;
1233 extradata[3] = 0xE5;
1234 extradata[4] = 0x80 | (sri<<3);
1235 extradata_size = 5;
1236 } else
1237 extradata_size = 2;
1238 } else if (codec_id == CODEC_ID_TTA) {
1239 ByteIOContext b;
1240 extradata_size = 30;
1241 extradata = av_mallocz(extradata_size);
1242 if (extradata == NULL)
1243 return AVERROR(ENOMEM);
1244 init_put_byte(&b, extradata, extradata_size, 1,
1245 NULL, NULL, NULL, NULL);
1246 put_buffer(&b, "TTA1", 4);
1247 put_le16(&b, 1);
1248 put_le16(&b, track->audio.channels);
1249 put_le16(&b, track->audio.bitdepth);
1250 put_le32(&b, track->audio.out_samplerate);
1251 put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1252 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1253 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1254 extradata_offset = 26;
1255 track->codec_priv.size -= extradata_offset;
1256 } else if (codec_id == CODEC_ID_RA_144) {
1257 track->audio.out_samplerate = 8000;
1258 track->audio.channels = 1;
1259 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1260 codec_id == CODEC_ID_ATRAC3) {
1261 ByteIOContext b;
1262
1263 init_put_byte(&b, track->codec_priv.data,track->codec_priv.size,
1264 0, NULL, NULL, NULL, NULL);
1265 url_fskip(&b, 24);
1266 track->audio.coded_framesize = get_be32(&b);
1267 url_fskip(&b, 12);
1268 track->audio.sub_packet_h = get_be16(&b);
1269 track->audio.frame_size = get_be16(&b);
1270 track->audio.sub_packet_size = get_be16(&b);
1271 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1272 if (codec_id == CODEC_ID_RA_288) {
1273 st->codec->block_align = track->audio.coded_framesize;
1274 track->codec_priv.size = 0;
1275 } else {
1276 st->codec->block_align = track->audio.sub_packet_size;
1277 extradata_offset = 78;
1278 track->codec_priv.size -= extradata_offset;
1279 }
1280 }
1281
1282 if (codec_id == CODEC_ID_NONE)
1283 av_log(matroska->ctx, AV_LOG_INFO,
1284 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1285
1286 if (track->time_scale < 0.01)
1287 track->time_scale = 1.0;
1288 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1289
1290 st->codec->codec_id = codec_id;
1291 st->start_time = 0;
1292 if (strcmp(track->language, "und"))
1293 av_strlcpy(st->language, track->language, 4);
1294
1295 if (track->flag_default)
1296 st->disposition |= AV_DISPOSITION_DEFAULT;
1297
1298 if (track->default_duration)
1299 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1300 track->default_duration, 1000000000, 30000);
1301
1302 if(extradata){
1303 st->codec->extradata = extradata;
1304 st->codec->extradata_size = extradata_size;
1305 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1306 st->codec->extradata = av_malloc(track->codec_priv.size);
1307 if(st->codec->extradata == NULL)
1308 return AVERROR(ENOMEM);
1309 st->codec->extradata_size = track->codec_priv.size;
1310 memcpy(st->codec->extradata,
1311 track->codec_priv.data + extradata_offset,
1312 track->codec_priv.size);
1313 }
1314
1315 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1316 st->codec->codec_type = CODEC_TYPE_VIDEO;
1317 st->codec->codec_tag = track->video.fourcc;
1318 st->codec->width = track->video.pixel_width;
1319 st->codec->height = track->video.pixel_height;
1320 av_reduce(&st->sample_aspect_ratio.num,
1321 &st->sample_aspect_ratio.den,
1322 st->codec->height * track->video.display_width,
1323 st->codec-> width * track->video.display_height,
1324 255);
1325 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1326 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1327 st->codec->codec_type = CODEC_TYPE_AUDIO;
1328 st->codec->sample_rate = track->audio.out_samplerate;
1329 st->codec->channels = track->audio.channels;
1330 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1331 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
1332 }
1333 }
1334
1335 attachements = attachements_list->elem;
1336 for (j=0; j<attachements_list->nb_elem; j++) {
1337 if (!(attachements[j].filename && attachements[j].mime &&
1338 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1339 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1340 } else {
1341 AVStream *st = av_new_stream(s, 0);
1342 if (st == NULL)
1343 break;
1344 st->filename = av_strdup(attachements[j].filename);
1345 st->codec->codec_id = CODEC_ID_NONE;
1346 st->codec->codec_type = CODEC_TYPE_ATTACHMENT;
1347 st->codec->extradata = av_malloc(attachements[j].bin.size);
1348 if(st->codec->extradata == NULL)
1349 break;
1350 st->codec->extradata_size = attachements[j].bin.size;
1351 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1352
1353 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1354 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1355 strlen(ff_mkv_mime_tags[i].str))) {
1356 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1357 break;
1358 }
1359 }
1360 }
1361 }
1362
1363 chapters = chapters_list->elem;
1364 for (i=0; i<chapters_list->nb_elem; i++)
1365 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid)
1366 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1367 chapters[i].start, chapters[i].end,
1368 chapters[i].title);
1369
1370 index_list = &matroska->index;
1371 index = index_list->elem;
1372 for (i=0; i<index_list->nb_elem; i++) {
1373 EbmlList *pos_list = &index[i].pos;
1374 MatroskaIndexPos *pos = pos_list->elem;
1375 for (j=0; j<pos_list->nb_elem; j++) {
1376 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1377 pos[j].track);
1378 if (track && track->stream)
1379 av_add_index_entry(track->stream,
1380 pos[j].pos + matroska->segment_start,
1381 index[i].time, 0, 0, AVINDEX_KEYFRAME);
1382 }
1383 }
1384
1385 return 0;
1386 }
1387
1388 /*
1389 * Put one packet in an application-supplied AVPacket struct.
1390 * Returns 0 on success or -1 on failure.
1391 */
1392 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1393 AVPacket *pkt)
1394 {
1395 if (matroska->num_packets > 0) {
1396 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1397 av_free(matroska->packets[0]);
1398 if (matroska->num_packets > 1) {
1399 memmove(&matroska->packets[0], &matroska->packets[1],
1400 (matroska->num_packets - 1) * sizeof(AVPacket *));
1401 matroska->packets =
1402 av_realloc(matroska->packets, (matroska->num_packets - 1) *
1403 sizeof(AVPacket *));
1404 } else {
1405 av_freep(&matroska->packets);
1406 }
1407 matroska->num_packets--;
1408 return 0;
1409 }
1410
1411 return -1;
1412 }
1413
1414 /*
1415 * Free all packets in our internal queue.
1416 */
1417 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1418 {
1419 if (matroska->packets) {
1420 int n;
1421 for (n = 0; n < matroska->num_packets; n++) {
1422 av_free_packet(matroska->packets[n]);
1423 av_free(matroska->packets[n]);
1424 }
1425 av_freep(&matroska->packets);
1426 matroska->num_packets = 0;
1427 }
1428 }
1429
1430 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1431 int size, int64_t pos, uint64_t cluster_time,
1432 uint64_t duration, int is_keyframe,
1433 int64_t cluster_pos)
1434 {
1435 uint64_t timecode = AV_NOPTS_VALUE;
1436 MatroskaTrack *track;
1437 int res = 0;
1438 AVStream *st;
1439 AVPacket *pkt;
1440 int16_t block_time;
1441 uint32_t *lace_size = NULL;
1442 int n, flags, laces = 0;
1443 uint64_t num;
1444
1445 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1446 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1447 return res;
1448 }
1449 data += n;
1450 size -= n;
1451
1452 track = matroska_find_track_by_num(matroska, num);
1453 if (size <= 3 || !track || !track->stream) {
1454 av_log(matroska->ctx, AV_LOG_INFO,
1455 "Invalid stream %"PRIu64" or size %u\n", num, size);
1456 return res;
1457 }
1458 st = track->stream;
1459 if (st->discard >= AVDISCARD_ALL)
1460 return res;
1461 if (duration == AV_NOPTS_VALUE)
1462 duration = track->default_duration / matroska->time_scale;
1463
1464 block_time = AV_RB16(data);
1465 data += 2;
1466 flags = *data++;
1467 size -= 3;
1468 if (is_keyframe == -1)
1469 is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0;
1470
1471 if (cluster_time != (uint64_t)-1
1472 && (block_time >= 0 || cluster_time >= -block_time)) {
1473 timecode = cluster_time + block_time;
1474 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1475 && timecode < track->end_timecode)
1476 is_keyframe = 0; /* overlapping subtitles are not key frame */
1477 if (is_keyframe)
1478 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1479 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1480 }
1481
1482 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1483 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1484 return res;
1485 matroska->skip_to_keyframe = 0;
1486 }
1487
1488 switch ((flags & 0x06) >> 1) {
1489 case 0x0: /* no lacing */
1490 laces = 1;
1491 lace_size = av_mallocz(sizeof(int));
1492 lace_size[0] = size;
1493 break;
1494
1495 case 0x1: /* Xiph lacing */
1496 case 0x2: /* fixed-size lacing */
1497 case 0x3: /* EBML lacing */
1498 assert(size>0); // size <=3 is checked before size-=3 above
1499 laces = (*data) + 1;
1500 data += 1;
1501 size -= 1;
1502 lace_size = av_mallocz(laces * sizeof(int));
1503
1504 switch ((flags & 0x06) >> 1) {
1505 case 0x1: /* Xiph lacing */ {
1506 uint8_t temp;
1507 uint32_t total = 0;
1508 for (n = 0; res == 0 && n < laces - 1; n++) {
1509 while (1) {
1510 if (size == 0) {
1511 res = -1;
1512 break;
1513 }
1514 temp = *data;
1515 lace_size[n] += temp;
1516 data += 1;
1517 size -= 1;
1518 if (temp != 0xff)
1519 break;
1520 }
1521 total += lace_size[n];
1522 }
1523 lace_size[n] = size - total;
1524 break;
1525 }
1526
1527 case 0x2: /* fixed-size lacing */
1528 for (n = 0; n < laces; n++)
1529 lace_size[n] = size / laces;
1530 break;
1531
1532 case 0x3: /* EBML lacing */ {
1533 uint32_t total;
1534 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1535 if (n < 0) {
1536 av_log(matroska->ctx, AV_LOG_INFO,
1537 "EBML block data error\n");
1538 break;
1539 }
1540 data += n;
1541 size -= n;
1542 total = lace_size[0] = num;
1543 for (n = 1; res == 0 && n < laces - 1; n++) {
1544 int64_t snum;
1545 int r;
1546 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1547 if (r < 0) {
1548 av_log(matroska->ctx, AV_LOG_INFO,
1549 "EBML block data error\n");
1550 break;
1551 }
1552 data += r;
1553 size -= r;
1554 lace_size[n] = lace_size[n - 1] + snum;
1555 total += lace_size[n];
1556 }
1557 lace_size[n] = size - total;
1558 break;
1559 }
1560 }
1561 break;
1562 }
1563
1564 if (res == 0) {
1565 for (n = 0; n < laces; n++) {
1566 if (st->codec->codec_id == CODEC_ID_RA_288 ||
1567 st->codec->codec_id == CODEC_ID_COOK ||
1568 st->codec->codec_id == CODEC_ID_ATRAC3) {
1569 int a = st->codec->block_align;
1570 int sps = track->audio.sub_packet_size;
1571 int cfs = track->audio.coded_framesize;
1572 int h = track->audio.sub_packet_h;
1573 int y = track->audio.sub_packet_cnt;
1574 int w = track->audio.frame_size;
1575 int x;
1576
1577 if (!track->audio.pkt_cnt) {
1578 if (st->codec->codec_id == CODEC_ID_RA_288)
1579 for (x=0; x<h/2; x++)
1580 memcpy(track->audio.buf+x*2*w+y*cfs,
1581 data+x*cfs, cfs);
1582 else
1583 for (x=0; x<w/sps; x++)
1584 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1585
1586 if (++track->audio.sub_packet_cnt >= h) {
1587 track->audio.sub_packet_cnt = 0;
1588 track->audio.pkt_cnt = h*w / a;
1589 }
1590 }
1591 while (track->audio.pkt_cnt) {
1592 pkt = av_mallocz(sizeof(AVPacket));
1593 av_new_packet(pkt, a);
1594 memcpy(pkt->data, track->audio.buf
1595 + a * (h*w / a - track->audio.pkt_cnt--), a);
1596 pkt->pos = pos;
1597 pkt->stream_index = st->index;
1598 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1599 }
1600 } else {
1601 MatroskaTrackEncoding *encodings = track->encodings.elem;
1602 int offset = 0, pkt_size = lace_size[n];
1603 uint8_t *pkt_data = data;
1604
1605 if (encodings && encodings->scope & 1) {
1606 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1607 if (offset < 0)
1608 continue;
1609 }
1610
1611 pkt = av_mallocz(sizeof(AVPacket));
1612 /* XXX: prevent data copy... */
1613 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1614 av_free(pkt);
1615 res = AVERROR(ENOMEM);
1616 n = laces-1;
1617 break;
1618 }
1619 if (offset)
1620 memcpy (pkt->data, encodings->compression.settings.data, offset);
1621 memcpy (pkt->data+offset, pkt_data, pkt_size);
1622
1623 if (pkt_data != data)
1624 av_free(pkt_data);
1625
1626 if (n == 0)
1627 pkt->flags = is_keyframe;
1628 pkt->stream_index = st->index;
1629
1630 pkt->pts = timecode;
1631 pkt->pos = pos;
1632 if (st->codec->codec_id == CODEC_ID_TEXT)
1633 pkt->convergence_duration = duration;
1634 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1635 pkt->duration = duration;
1636
1637 if (st->codec->codec_id == CODEC_ID_SSA)
1638 matroska_fix_ass_packet(matroska, pkt, duration);
1639
1640 if (matroska->prev_pkt &&
1641 timecode != AV_NOPTS_VALUE &&
1642 matroska->prev_pkt->pts == timecode &&
1643 matroska->prev_pkt->stream_index == st->index)
1644 matroska_merge_packets(matroska->prev_pkt, pkt);
1645 else {
1646 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1647 matroska->prev_pkt = pkt;
1648 }
1649 }
1650
1651 if (timecode != AV_NOPTS_VALUE)
1652 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1653 data += lace_size[n];
1654 }
1655 }
1656
1657 av_free(lace_size);
1658 return res;
1659 }
1660
1661 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1662 {
1663 MatroskaCluster cluster = { 0 };
1664 EbmlList *blocks_list;
1665 MatroskaBlock *blocks;
1666 int i, res;
1667 int64_t pos = url_ftell(matroska->ctx->pb);
1668 matroska->prev_pkt = NULL;
1669 if (matroska->has_cluster_id){
1670 /* For the first cluster we parse, its ID was already read as
1671 part of matroska_read_header(), so don't read it again */
1672 res = ebml_parse_id(matroska, matroska_clusters,
1673 MATROSKA_ID_CLUSTER, &cluster);
1674 pos -= 4; /* sizeof the ID which was already read */
1675 matroska->has_cluster_id = 0;
1676 } else
1677 res = ebml_parse(matroska, matroska_clusters, &cluster);
1678 blocks_list = &cluster.blocks;
1679 blocks = blocks_list->elem;
1680 for (i=0; i<blocks_list->nb_elem; i++)
1681 if (blocks[i].bin.size > 0)
1682 res=matroska_parse_block(matroska,
1683 blocks[i].bin.data, blocks[i].bin.size,
1684 blocks[i].bin.pos, cluster.timecode,
1685 blocks[i].duration, !blocks[i].reference,
1686 pos);
1687 ebml_free(matroska_cluster, &cluster);
1688 if (res < 0) matroska->done = 1;
1689 return res;
1690 }
1691
1692 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1693 {
1694 MatroskaDemuxContext *matroska = s->priv_data;
1695
1696 while (matroska_deliver_packet(matroska, pkt)) {
1697 if (matroska->done)
1698 return AVERROR(EIO);
1699 matroska_parse_cluster(matroska);
1700 }
1701
1702 return 0;
1703 }
1704
1705 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1706 int64_t timestamp, int flags)
1707 {
1708 MatroskaDemuxContext *matroska = s->priv_data;
1709 MatroskaTrack *tracks = matroska->tracks.elem;
1710 AVStream *st = s->streams[stream_index];
1711 int i, index, index_sub, index_min;
1712
1713 if (!st->nb_index_entries)
1714 return 0;
1715 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1716
1717 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1718 url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1719 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1720 matroska_clear_queue(matroska);
1721 if (matroska_parse_cluster(matroska) < 0)
1722 break;
1723 }
1724 }
1725
1726 matroska_clear_queue(matroska);
1727 if (index < 0)
1728 return 0;
1729
1730 index_min = index;
1731 for (i=0; i < matroska->tracks.nb_elem; i++) {
1732 tracks[i].end_timecode = 0;
1733 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1734 && !tracks[i].stream->discard != AVDISCARD_ALL) {
1735 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1736 if (index_sub >= 0
1737 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1738 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1739 index_min = index_sub;
1740 }
1741 }
1742
1743 url_fseek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1744 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1745 matroska->skip_to_timecode = st->index_entries[index].timestamp;
1746 matroska->done = 0;
1747 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1748 return 0;
1749 }
1750
1751 static int matroska_read_close(AVFormatContext *s)
1752 {
1753 MatroskaDemuxContext *matroska = s->priv_data;
1754 MatroskaTrack *tracks = matroska->tracks.elem;
1755 int n;
1756
1757 matroska_clear_queue(matroska);
1758
1759 for (n=0; n < matroska->tracks.nb_elem; n++)
1760 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1761 av_free(tracks[n].audio.buf);
1762 ebml_free(matroska_segment, matroska);
1763
1764 return 0;
1765 }
1766
1767 AVInputFormat matroska_demuxer = {
1768 "matroska",
1769 NULL_IF_CONFIG_SMALL("Matroska file format"),
1770 sizeof(MatroskaDemuxContext),
1771 matroska_probe,
1772 matroska_read_header,
1773 matroska_read_packet,
1774 matroska_read_close,
1775 matroska_read_seek,
1776 };
VDPAU for FFmpeg