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Move #defines that are mostly used in h264.c out of h264data.h and into h264.h.
[FFMpeg-mirror/ffmpeg-vdpau.git] / libavformat / matroskadec.c
blob5a79712f05ff34e13d429e593c7f8af2b6648d56
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 int index_scale = 1;
1078 Ebml ebml = { 0 };
1079 AVStream *st;
1080 int i, j;
1081
1082 matroska->ctx = s;
1083
1084 /* First read the EBML header. */
1085 if (ebml_parse(matroska, ebml_syntax, &ebml)
1086 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1087 || ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska")
1088 || ebml.doctype_version > 2) {
1089 av_log(matroska->ctx, AV_LOG_ERROR,
1090 "EBML header using unsupported features\n"
1091 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1092 ebml.version, ebml.doctype, ebml.doctype_version);
1093 return AVERROR_NOFMT;
1094 }
1095 ebml_free(ebml_syntax, &ebml);
1096
1097 /* The next thing is a segment. */
1098 if (ebml_parse(matroska, matroska_segments, matroska) < 0)
1099 return -1;
1100 matroska_execute_seekhead(matroska);
1101
1102 if (matroska->duration)
1103 matroska->ctx->duration = matroska->duration * matroska->time_scale
1104 * 1000 / AV_TIME_BASE;
1105 if (matroska->title)
1106 strncpy(matroska->ctx->title, matroska->title,
1107 sizeof(matroska->ctx->title)-1);
1108 matroska_convert_tags(s, &matroska->tags);
1109
1110 tracks = matroska->tracks.elem;
1111 for (i=0; i < matroska->tracks.nb_elem; i++) {
1112 MatroskaTrack *track = &tracks[i];
1113 enum CodecID codec_id = CODEC_ID_NONE;
1114 EbmlList *encodings_list = &tracks->encodings;
1115 MatroskaTrackEncoding *encodings = encodings_list->elem;
1116 uint8_t *extradata = NULL;
1117 int extradata_size = 0;
1118 int extradata_offset = 0;
1119
1120 /* Apply some sanity checks. */
1121 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1122 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1123 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1124 av_log(matroska->ctx, AV_LOG_INFO,
1125 "Unknown or unsupported track type %"PRIu64"\n",
1126 track->type);
1127 continue;
1128 }
1129 if (track->codec_id == NULL)
1130 continue;
1131
1132 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1133 if (!track->default_duration)
1134 track->default_duration = 1000000000/track->video.frame_rate;
1135 if (!track->video.display_width)
1136 track->video.display_width = track->video.pixel_width;
1137 if (!track->video.display_height)
1138 track->video.display_height = track->video.pixel_height;
1139 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1140 if (!track->audio.out_samplerate)
1141 track->audio.out_samplerate = track->audio.samplerate;
1142 }
1143 if (encodings_list->nb_elem > 1) {
1144 av_log(matroska->ctx, AV_LOG_ERROR,
1145 "Multiple combined encodings no supported");
1146 } else if (encodings_list->nb_elem == 1) {
1147 if (encodings[0].type ||
1148 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1149 #ifdef CONFIG_ZLIB
1150 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1151 #endif
1152 #ifdef CONFIG_BZLIB
1153 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1154 #endif
1155 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1156 encodings[0].scope = 0;
1157 av_log(matroska->ctx, AV_LOG_ERROR,
1158 "Unsupported encoding type");
1159 } else if (track->codec_priv.size && encodings[0].scope&2) {
1160 uint8_t *codec_priv = track->codec_priv.data;
1161 int offset = matroska_decode_buffer(&track->codec_priv.data,
1162 &track->codec_priv.size,
1163 track);
1164 if (offset < 0) {
1165 track->codec_priv.data = NULL;
1166 track->codec_priv.size = 0;
1167 av_log(matroska->ctx, AV_LOG_ERROR,
1168 "Failed to decode codec private data\n");
1169 } else if (offset > 0) {
1170 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1171 memcpy(track->codec_priv.data,
1172 encodings[0].compression.settings.data, offset);
1173 memcpy(track->codec_priv.data+offset, codec_priv,
1174 track->codec_priv.size);
1175 track->codec_priv.size += offset;
1176 }
1177 if (codec_priv != track->codec_priv.data)
1178 av_free(codec_priv);
1179 }
1180 }
1181
1182 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1183 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1184 strlen(ff_mkv_codec_tags[j].str))){
1185 codec_id= ff_mkv_codec_tags[j].id;
1186 break;
1187 }
1188 }
1189
1190 st = track->stream = av_new_stream(s, 0);
1191 if (st == NULL)
1192 return AVERROR(ENOMEM);
1193
1194 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
1195 && track->codec_priv.size >= 40
1196 && track->codec_priv.data != NULL) {
1197 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1198 codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc);
1199 } else if (!strcmp(track->codec_id, "A_MS/ACM")
1200 && track->codec_priv.size >= 18
1201 && track->codec_priv.data != NULL) {
1202 uint16_t tag = AV_RL16(track->codec_priv.data);
1203 codec_id = codec_get_id(codec_wav_tags, tag);
1204 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1205 && (track->codec_priv.size >= 86)
1206 && (track->codec_priv.data != NULL)) {
1207 track->video.fourcc = AV_RL32(track->codec_priv.data);
1208 codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc);
1209 } else if (codec_id == CODEC_ID_PCM_S16BE) {
1210 switch (track->audio.bitdepth) {
1211 case 8: codec_id = CODEC_ID_PCM_U8; break;
1212 case 24: codec_id = CODEC_ID_PCM_S24BE; break;
1213 case 32: codec_id = CODEC_ID_PCM_S32BE; break;
1214 }
1215 } else if (codec_id == CODEC_ID_PCM_S16LE) {
1216 switch (track->audio.bitdepth) {
1217 case 8: codec_id = CODEC_ID_PCM_U8; break;
1218 case 24: codec_id = CODEC_ID_PCM_S24LE; break;
1219 case 32: codec_id = CODEC_ID_PCM_S32LE; break;
1220 }
1221 } else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
1222 codec_id = CODEC_ID_PCM_F64LE;
1223 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1224 int profile = matroska_aac_profile(track->codec_id);
1225 int sri = matroska_aac_sri(track->audio.samplerate);
1226 extradata = av_malloc(5);
1227 if (extradata == NULL)
1228 return AVERROR(ENOMEM);
1229 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1230 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1231 if (strstr(track->codec_id, "SBR")) {
1232 sri = matroska_aac_sri(track->audio.out_samplerate);
1233 extradata[2] = 0x56;
1234 extradata[3] = 0xE5;
1235 extradata[4] = 0x80 | (sri<<3);
1236 extradata_size = 5;
1237 } else
1238 extradata_size = 2;
1239 } else if (codec_id == CODEC_ID_TTA) {
1240 ByteIOContext b;
1241 extradata_size = 30;
1242 extradata = av_mallocz(extradata_size);
1243 if (extradata == NULL)
1244 return AVERROR(ENOMEM);
1245 init_put_byte(&b, extradata, extradata_size, 1,
1246 NULL, NULL, NULL, NULL);
1247 put_buffer(&b, "TTA1", 4);
1248 put_le16(&b, 1);
1249 put_le16(&b, track->audio.channels);
1250 put_le16(&b, track->audio.bitdepth);
1251 put_le32(&b, track->audio.out_samplerate);
1252 put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1253 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1254 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1255 extradata_offset = 26;
1256 track->codec_priv.size -= extradata_offset;
1257 } else if (codec_id == CODEC_ID_RA_144) {
1258 track->audio.out_samplerate = 8000;
1259 track->audio.channels = 1;
1260 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1261 codec_id == CODEC_ID_ATRAC3) {
1262 ByteIOContext b;
1263
1264 init_put_byte(&b, track->codec_priv.data,track->codec_priv.size,
1265 0, NULL, NULL, NULL, NULL);
1266 url_fskip(&b, 24);
1267 track->audio.coded_framesize = get_be32(&b);
1268 url_fskip(&b, 12);
1269 track->audio.sub_packet_h = get_be16(&b);
1270 track->audio.frame_size = get_be16(&b);
1271 track->audio.sub_packet_size = get_be16(&b);
1272 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1273 if (codec_id == CODEC_ID_RA_288) {
1274 st->codec->block_align = track->audio.coded_framesize;
1275 track->codec_priv.size = 0;
1276 } else {
1277 st->codec->block_align = track->audio.sub_packet_size;
1278 extradata_offset = 78;
1279 track->codec_priv.size -= extradata_offset;
1280 }
1281 }
1282
1283 if (codec_id == CODEC_ID_NONE)
1284 av_log(matroska->ctx, AV_LOG_INFO,
1285 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1286
1287 if (track->time_scale < 0.01)
1288 track->time_scale = 1.0;
1289 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1290
1291 st->codec->codec_id = codec_id;
1292 st->start_time = 0;
1293 if (strcmp(track->language, "und"))
1294 av_strlcpy(st->language, track->language, 4);
1295
1296 if (track->flag_default)
1297 st->disposition |= AV_DISPOSITION_DEFAULT;
1298
1299 if (track->default_duration)
1300 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1301 track->default_duration, 1000000000, 30000);
1302
1303 if(extradata){
1304 st->codec->extradata = extradata;
1305 st->codec->extradata_size = extradata_size;
1306 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1307 st->codec->extradata = av_malloc(track->codec_priv.size);
1308 if(st->codec->extradata == NULL)
1309 return AVERROR(ENOMEM);
1310 st->codec->extradata_size = track->codec_priv.size;
1311 memcpy(st->codec->extradata,
1312 track->codec_priv.data + extradata_offset,
1313 track->codec_priv.size);
1314 }
1315
1316 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1317 st->codec->codec_type = CODEC_TYPE_VIDEO;
1318 st->codec->codec_tag = track->video.fourcc;
1319 st->codec->width = track->video.pixel_width;
1320 st->codec->height = track->video.pixel_height;
1321 av_reduce(&st->sample_aspect_ratio.num,
1322 &st->sample_aspect_ratio.den,
1323 st->codec->height * track->video.display_width,
1324 st->codec-> width * track->video.display_height,
1325 255);
1326 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1327 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1328 st->codec->codec_type = CODEC_TYPE_AUDIO;
1329 st->codec->sample_rate = track->audio.out_samplerate;
1330 st->codec->channels = track->audio.channels;
1331 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1332 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
1333 }
1334 }
1335
1336 attachements = attachements_list->elem;
1337 for (j=0; j<attachements_list->nb_elem; j++) {
1338 if (!(attachements[j].filename && attachements[j].mime &&
1339 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1340 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1341 } else {
1342 AVStream *st = av_new_stream(s, 0);
1343 if (st == NULL)
1344 break;
1345 st->filename = av_strdup(attachements[j].filename);
1346 st->codec->codec_id = CODEC_ID_NONE;
1347 st->codec->codec_type = CODEC_TYPE_ATTACHMENT;
1348 st->codec->extradata = av_malloc(attachements[j].bin.size);
1349 if(st->codec->extradata == NULL)
1350 break;
1351 st->codec->extradata_size = attachements[j].bin.size;
1352 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1353
1354 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1355 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1356 strlen(ff_mkv_mime_tags[i].str))) {
1357 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1358 break;
1359 }
1360 }
1361 }
1362 }
1363
1364 chapters = chapters_list->elem;
1365 for (i=0; i<chapters_list->nb_elem; i++)
1366 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid)
1367 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1368 chapters[i].start, chapters[i].end,
1369 chapters[i].title);
1370
1371 index_list = &matroska->index;
1372 index = index_list->elem;
1373 if (index_list->nb_elem
1374 && index[0].time > 100000000000000/matroska->time_scale) {
1375 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1376 index_scale = matroska->time_scale;
1377 }
1378 for (i=0; i<index_list->nb_elem; i++) {
1379 EbmlList *pos_list = &index[i].pos;
1380 MatroskaIndexPos *pos = pos_list->elem;
1381 for (j=0; j<pos_list->nb_elem; j++) {
1382 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1383 pos[j].track);
1384 if (track && track->stream)
1385 av_add_index_entry(track->stream,
1386 pos[j].pos + matroska->segment_start,
1387 index[i].time/index_scale, 0, 0,
1388 AVINDEX_KEYFRAME);
1389 }
1390 }
1391
1392 return 0;
1393 }
1394
1395 /*
1396 * Put one packet in an application-supplied AVPacket struct.
1397 * Returns 0 on success or -1 on failure.
1398 */
1399 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
1400 AVPacket *pkt)
1401 {
1402 if (matroska->num_packets > 0) {
1403 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
1404 av_free(matroska->packets[0]);
1405 if (matroska->num_packets > 1) {
1406 memmove(&matroska->packets[0], &matroska->packets[1],
1407 (matroska->num_packets - 1) * sizeof(AVPacket *));
1408 matroska->packets =
1409 av_realloc(matroska->packets, (matroska->num_packets - 1) *
1410 sizeof(AVPacket *));
1411 } else {
1412 av_freep(&matroska->packets);
1413 }
1414 matroska->num_packets--;
1415 return 0;
1416 }
1417
1418 return -1;
1419 }
1420
1421 /*
1422 * Free all packets in our internal queue.
1423 */
1424 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
1425 {
1426 if (matroska->packets) {
1427 int n;
1428 for (n = 0; n < matroska->num_packets; n++) {
1429 av_free_packet(matroska->packets[n]);
1430 av_free(matroska->packets[n]);
1431 }
1432 av_freep(&matroska->packets);
1433 matroska->num_packets = 0;
1434 }
1435 }
1436
1437 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1438 int size, int64_t pos, uint64_t cluster_time,
1439 uint64_t duration, int is_keyframe,
1440 int64_t cluster_pos)
1441 {
1442 uint64_t timecode = AV_NOPTS_VALUE;
1443 MatroskaTrack *track;
1444 int res = 0;
1445 AVStream *st;
1446 AVPacket *pkt;
1447 int16_t block_time;
1448 uint32_t *lace_size = NULL;
1449 int n, flags, laces = 0;
1450 uint64_t num;
1451
1452 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
1453 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1454 return res;
1455 }
1456 data += n;
1457 size -= n;
1458
1459 track = matroska_find_track_by_num(matroska, num);
1460 if (size <= 3 || !track || !track->stream) {
1461 av_log(matroska->ctx, AV_LOG_INFO,
1462 "Invalid stream %"PRIu64" or size %u\n", num, size);
1463 return res;
1464 }
1465 st = track->stream;
1466 if (st->discard >= AVDISCARD_ALL)
1467 return res;
1468 if (duration == AV_NOPTS_VALUE)
1469 duration = track->default_duration / matroska->time_scale;
1470
1471 block_time = AV_RB16(data);
1472 data += 2;
1473 flags = *data++;
1474 size -= 3;
1475 if (is_keyframe == -1)
1476 is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0;
1477
1478 if (cluster_time != (uint64_t)-1
1479 && (block_time >= 0 || cluster_time >= -block_time)) {
1480 timecode = cluster_time + block_time;
1481 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
1482 && timecode < track->end_timecode)
1483 is_keyframe = 0; /* overlapping subtitles are not key frame */
1484 if (is_keyframe)
1485 av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
1486 track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
1487 }
1488
1489 if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1490 if (!is_keyframe || timecode < matroska->skip_to_timecode)
1491 return res;
1492 matroska->skip_to_keyframe = 0;
1493 }
1494
1495 switch ((flags & 0x06) >> 1) {
1496 case 0x0: /* no lacing */
1497 laces = 1;
1498 lace_size = av_mallocz(sizeof(int));
1499 lace_size[0] = size;
1500 break;
1501
1502 case 0x1: /* Xiph lacing */
1503 case 0x2: /* fixed-size lacing */
1504 case 0x3: /* EBML lacing */
1505 assert(size>0); // size <=3 is checked before size-=3 above
1506 laces = (*data) + 1;
1507 data += 1;
1508 size -= 1;
1509 lace_size = av_mallocz(laces * sizeof(int));
1510
1511 switch ((flags & 0x06) >> 1) {
1512 case 0x1: /* Xiph lacing */ {
1513 uint8_t temp;
1514 uint32_t total = 0;
1515 for (n = 0; res == 0 && n < laces - 1; n++) {
1516 while (1) {
1517 if (size == 0) {
1518 res = -1;
1519 break;
1520 }
1521 temp = *data;
1522 lace_size[n] += temp;
1523 data += 1;
1524 size -= 1;
1525 if (temp != 0xff)
1526 break;
1527 }
1528 total += lace_size[n];
1529 }
1530 lace_size[n] = size - total;
1531 break;
1532 }
1533
1534 case 0x2: /* fixed-size lacing */
1535 for (n = 0; n < laces; n++)
1536 lace_size[n] = size / laces;
1537 break;
1538
1539 case 0x3: /* EBML lacing */ {
1540 uint32_t total;
1541 n = matroska_ebmlnum_uint(matroska, data, size, &num);
1542 if (n < 0) {
1543 av_log(matroska->ctx, AV_LOG_INFO,
1544 "EBML block data error\n");
1545 break;
1546 }
1547 data += n;
1548 size -= n;
1549 total = lace_size[0] = num;
1550 for (n = 1; res == 0 && n < laces - 1; n++) {
1551 int64_t snum;
1552 int r;
1553 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
1554 if (r < 0) {
1555 av_log(matroska->ctx, AV_LOG_INFO,
1556 "EBML block data error\n");
1557 break;
1558 }
1559 data += r;
1560 size -= r;
1561 lace_size[n] = lace_size[n - 1] + snum;
1562 total += lace_size[n];
1563 }
1564 lace_size[n] = size - total;
1565 break;
1566 }
1567 }
1568 break;
1569 }
1570
1571 if (res == 0) {
1572 for (n = 0; n < laces; n++) {
1573 if (st->codec->codec_id == CODEC_ID_RA_288 ||
1574 st->codec->codec_id == CODEC_ID_COOK ||
1575 st->codec->codec_id == CODEC_ID_ATRAC3) {
1576 int a = st->codec->block_align;
1577 int sps = track->audio.sub_packet_size;
1578 int cfs = track->audio.coded_framesize;
1579 int h = track->audio.sub_packet_h;
1580 int y = track->audio.sub_packet_cnt;
1581 int w = track->audio.frame_size;
1582 int x;
1583
1584 if (!track->audio.pkt_cnt) {
1585 if (st->codec->codec_id == CODEC_ID_RA_288)
1586 for (x=0; x<h/2; x++)
1587 memcpy(track->audio.buf+x*2*w+y*cfs,
1588 data+x*cfs, cfs);
1589 else
1590 for (x=0; x<w/sps; x++)
1591 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1592
1593 if (++track->audio.sub_packet_cnt >= h) {
1594 track->audio.sub_packet_cnt = 0;
1595 track->audio.pkt_cnt = h*w / a;
1596 }
1597 }
1598 while (track->audio.pkt_cnt) {
1599 pkt = av_mallocz(sizeof(AVPacket));
1600 av_new_packet(pkt, a);
1601 memcpy(pkt->data, track->audio.buf
1602 + a * (h*w / a - track->audio.pkt_cnt--), a);
1603 pkt->pos = pos;
1604 pkt->stream_index = st->index;
1605 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1606 }
1607 } else {
1608 MatroskaTrackEncoding *encodings = track->encodings.elem;
1609 int offset = 0, pkt_size = lace_size[n];
1610 uint8_t *pkt_data = data;
1611
1612 if (encodings && encodings->scope & 1) {
1613 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1614 if (offset < 0)
1615 continue;
1616 }
1617
1618 pkt = av_mallocz(sizeof(AVPacket));
1619 /* XXX: prevent data copy... */
1620 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1621 av_free(pkt);
1622 res = AVERROR(ENOMEM);
1623 n = laces-1;
1624 break;
1625 }
1626 if (offset)
1627 memcpy (pkt->data, encodings->compression.settings.data, offset);
1628 memcpy (pkt->data+offset, pkt_data, pkt_size);
1629
1630 if (pkt_data != data)
1631 av_free(pkt_data);
1632
1633 if (n == 0)
1634 pkt->flags = is_keyframe;
1635 pkt->stream_index = st->index;
1636
1637 pkt->pts = timecode;
1638 pkt->pos = pos;
1639 if (st->codec->codec_id == CODEC_ID_TEXT)
1640 pkt->convergence_duration = duration;
1641 else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
1642 pkt->duration = duration;
1643
1644 if (st->codec->codec_id == CODEC_ID_SSA)
1645 matroska_fix_ass_packet(matroska, pkt, duration);
1646
1647 if (matroska->prev_pkt &&
1648 timecode != AV_NOPTS_VALUE &&
1649 matroska->prev_pkt->pts == timecode &&
1650 matroska->prev_pkt->stream_index == st->index)
1651 matroska_merge_packets(matroska->prev_pkt, pkt);
1652 else {
1653 dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
1654 matroska->prev_pkt = pkt;
1655 }
1656 }
1657
1658 if (timecode != AV_NOPTS_VALUE)
1659 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1660 data += lace_size[n];
1661 }
1662 }
1663
1664 av_free(lace_size);
1665 return res;
1666 }
1667
1668 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1669 {
1670 MatroskaCluster cluster = { 0 };
1671 EbmlList *blocks_list;
1672 MatroskaBlock *blocks;
1673 int i, res;
1674 int64_t pos = url_ftell(matroska->ctx->pb);
1675 matroska->prev_pkt = NULL;
1676 if (matroska->has_cluster_id){
1677 /* For the first cluster we parse, its ID was already read as
1678 part of matroska_read_header(), so don't read it again */
1679 res = ebml_parse_id(matroska, matroska_clusters,
1680 MATROSKA_ID_CLUSTER, &cluster);
1681 pos -= 4; /* sizeof the ID which was already read */
1682 matroska->has_cluster_id = 0;
1683 } else
1684 res = ebml_parse(matroska, matroska_clusters, &cluster);
1685 blocks_list = &cluster.blocks;
1686 blocks = blocks_list->elem;
1687 for (i=0; i<blocks_list->nb_elem; i++)
1688 if (blocks[i].bin.size > 0)
1689 res=matroska_parse_block(matroska,
1690 blocks[i].bin.data, blocks[i].bin.size,
1691 blocks[i].bin.pos, cluster.timecode,
1692 blocks[i].duration, !blocks[i].reference,
1693 pos);
1694 ebml_free(matroska_cluster, &cluster);
1695 if (res < 0) matroska->done = 1;
1696 return res;
1697 }
1698
1699 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1700 {
1701 MatroskaDemuxContext *matroska = s->priv_data;
1702
1703 while (matroska_deliver_packet(matroska, pkt)) {
1704 if (matroska->done)
1705 return AVERROR(EIO);
1706 matroska_parse_cluster(matroska);
1707 }
1708
1709 return 0;
1710 }
1711
1712 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1713 int64_t timestamp, int flags)
1714 {
1715 MatroskaDemuxContext *matroska = s->priv_data;
1716 MatroskaTrack *tracks = matroska->tracks.elem;
1717 AVStream *st = s->streams[stream_index];
1718 int i, index, index_sub, index_min;
1719
1720 if (!st->nb_index_entries)
1721 return 0;
1722 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
1723
1724 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1725 url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
1726 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
1727 matroska_clear_queue(matroska);
1728 if (matroska_parse_cluster(matroska) < 0)
1729 break;
1730 }
1731 }
1732
1733 matroska_clear_queue(matroska);
1734 if (index < 0)
1735 return 0;
1736
1737 index_min = index;
1738 for (i=0; i < matroska->tracks.nb_elem; i++) {
1739 tracks[i].end_timecode = 0;
1740 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
1741 && !tracks[i].stream->discard != AVDISCARD_ALL) {
1742 index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
1743 if (index_sub >= 0
1744 && st->index_entries[index_sub].pos < st->index_entries[index_min].pos
1745 && st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
1746 index_min = index_sub;
1747 }
1748 }
1749
1750 url_fseek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
1751 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1752 matroska->skip_to_timecode = st->index_entries[index].timestamp;
1753 matroska->done = 0;
1754 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1755 return 0;
1756 }
1757
1758 static int matroska_read_close(AVFormatContext *s)
1759 {
1760 MatroskaDemuxContext *matroska = s->priv_data;
1761 MatroskaTrack *tracks = matroska->tracks.elem;
1762 int n;
1763
1764 matroska_clear_queue(matroska);
1765
1766 for (n=0; n < matroska->tracks.nb_elem; n++)
1767 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1768 av_free(tracks[n].audio.buf);
1769 ebml_free(matroska_segment, matroska);
1770
1771 return 0;
1772 }
1773
1774 AVInputFormat matroska_demuxer = {
1775 "matroska",
1776 NULL_IF_CONFIG_SMALL("Matroska file format"),
1777 sizeof(MatroskaDemuxContext),
1778 matroska_probe,
1779 matroska_read_header,
1780 matroska_read_packet,
1781 matroska_read_close,
1782 matroska_read_seek,
1783 };
VDPAU for FFmpeg