4e121b6afe3e2273b00a0458e34c9d4d04561f29
[libav.git] / libavformat / matroskadec.c
1 /*
2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The Libav Project
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
29 */
30
31 #include "config.h"
32
33 #include <inttypes.h>
34 #include <stdio.h>
35 #if CONFIG_BZLIB
36 #include <bzlib.h>
37 #endif
38 #if CONFIG_ZLIB
39 #include <zlib.h>
40 #endif
41
42 #include "libavutil/avstring.h"
43 #include "libavutil/dict.h"
44 #include "libavutil/intfloat.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/lzo.h"
47 #include "libavutil/mathematics.h"
48
49 #include "libavcodec/bytestream.h"
50 #include "libavcodec/flac.h"
51 #include "libavcodec/mpeg4audio.h"
52
53 #include "avformat.h"
54 #include "avio_internal.h"
55 #include "internal.h"
56 #include "isom.h"
57 #include "matroska.h"
58 #include "oggdec.h"
59 /* For ff_codec_get_id(). */
60 #include "riff.h"
61 #include "rmsipr.h"
62
63 typedef enum {
64 EBML_NONE,
65 EBML_UINT,
66 EBML_FLOAT,
67 EBML_STR,
68 EBML_UTF8,
69 EBML_BIN,
70 EBML_NEST,
71 EBML_PASS,
72 EBML_STOP,
73 EBML_TYPE_COUNT
74 } EbmlType;
75
76 typedef const struct EbmlSyntax {
77 uint32_t id;
78 EbmlType type;
79 int list_elem_size;
80 int data_offset;
81 union {
82 uint64_t u;
83 double f;
84 const char *s;
85 const struct EbmlSyntax *n;
86 } def;
87 } EbmlSyntax;
88
89 typedef struct EbmlList {
90 int nb_elem;
91 void *elem;
92 } EbmlList;
93
94 typedef struct EbmlBin {
95 int size;
96 uint8_t *data;
97 int64_t pos;
98 } EbmlBin;
99
100 typedef struct Ebml {
101 uint64_t version;
102 uint64_t max_size;
103 uint64_t id_length;
104 char *doctype;
105 uint64_t doctype_version;
106 } Ebml;
107
108 typedef struct MatroskaTrackCompression {
109 uint64_t algo;
110 EbmlBin settings;
111 } MatroskaTrackCompression;
112
113 typedef struct MatroskaTrackEncoding {
114 uint64_t scope;
115 uint64_t type;
116 MatroskaTrackCompression compression;
117 } MatroskaTrackEncoding;
118
119 typedef struct MatroskaTrackVideo {
120 double frame_rate;
121 uint64_t display_width;
122 uint64_t display_height;
123 uint64_t pixel_width;
124 uint64_t pixel_height;
125 uint64_t fourcc;
126 uint64_t interlaced;
127 uint64_t field_order;
128 uint64_t stereo_mode;
129 } MatroskaTrackVideo;
130
131 typedef struct MatroskaTrackAudio {
132 double samplerate;
133 double out_samplerate;
134 uint64_t bitdepth;
135 uint64_t channels;
136
137 /* real audio header (extracted from extradata) */
138 int coded_framesize;
139 int sub_packet_h;
140 int frame_size;
141 int sub_packet_size;
142 int sub_packet_cnt;
143 int pkt_cnt;
144 uint64_t buf_timecode;
145 uint8_t *buf;
146 } MatroskaTrackAudio;
147
148 typedef struct MatroskaTrack {
149 uint64_t num;
150 uint64_t uid;
151 uint64_t type;
152 char *name;
153 char *codec_id;
154 EbmlBin codec_priv;
155 char *language;
156 double time_scale;
157 uint64_t default_duration;
158 uint64_t flag_default;
159 uint64_t flag_forced;
160 MatroskaTrackVideo video;
161 MatroskaTrackAudio audio;
162 EbmlList encodings;
163 uint64_t codec_delay;
164
165 AVStream *stream;
166 int64_t end_timecode;
167 int ms_compat;
168 } MatroskaTrack;
169
170 typedef struct MatroskaAttachment {
171 uint64_t uid;
172 char *filename;
173 char *mime;
174 EbmlBin bin;
175
176 AVStream *stream;
177 } MatroskaAttachment;
178
179 typedef struct MatroskaChapter {
180 uint64_t start;
181 uint64_t end;
182 uint64_t uid;
183 char *title;
184
185 AVChapter *chapter;
186 } MatroskaChapter;
187
188 typedef struct MatroskaIndexPos {
189 uint64_t track;
190 uint64_t pos;
191 } MatroskaIndexPos;
192
193 typedef struct MatroskaIndex {
194 uint64_t time;
195 EbmlList pos;
196 } MatroskaIndex;
197
198 typedef struct MatroskaTag {
199 char *name;
200 char *string;
201 char *lang;
202 uint64_t def;
203 EbmlList sub;
204 } MatroskaTag;
205
206 typedef struct MatroskaTagTarget {
207 char *type;
208 uint64_t typevalue;
209 uint64_t trackuid;
210 uint64_t chapteruid;
211 uint64_t attachuid;
212 } MatroskaTagTarget;
213
214 typedef struct MatroskaTags {
215 MatroskaTagTarget target;
216 EbmlList tag;
217 } MatroskaTags;
218
219 typedef struct MatroskaSeekhead {
220 uint64_t id;
221 uint64_t pos;
222 } MatroskaSeekhead;
223
224 typedef struct MatroskaLevel {
225 uint64_t start;
226 uint64_t length;
227 } MatroskaLevel;
228
229 typedef struct MatroskaCluster {
230 uint64_t timecode;
231 EbmlList blocks;
232 } MatroskaCluster;
233
234 typedef struct MatroskaDemuxContext {
235 AVFormatContext *ctx;
236
237 /* EBML stuff */
238 int num_levels;
239 MatroskaLevel levels[EBML_MAX_DEPTH];
240 int level_up;
241 uint32_t current_id;
242
243 uint64_t time_scale;
244 double duration;
245 char *title;
246 EbmlList tracks;
247 EbmlList attachments;
248 EbmlList chapters;
249 EbmlList index;
250 EbmlList tags;
251 EbmlList seekhead;
252
253 /* byte position of the segment inside the stream */
254 int64_t segment_start;
255
256 /* the packet queue */
257 AVPacket **packets;
258 int num_packets;
259 AVPacket *prev_pkt;
260
261 int done;
262
263 /* What to skip before effectively reading a packet. */
264 int skip_to_keyframe;
265 uint64_t skip_to_timecode;
266
267 /* File has a CUES element, but we defer parsing until it is needed. */
268 int cues_parsing_deferred;
269
270 int current_cluster_num_blocks;
271 int64_t current_cluster_pos;
272 MatroskaCluster current_cluster;
273
274 /* File has SSA subtitles which prevent incremental cluster parsing. */
275 int contains_ssa;
276 } MatroskaDemuxContext;
277
278 typedef struct MatroskaBlock {
279 uint64_t duration;
280 int64_t reference;
281 uint64_t non_simple;
282 EbmlBin bin;
283 } MatroskaBlock;
284
285 static EbmlSyntax ebml_header[] = {
286 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
287 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
288 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
289 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
290 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
291 { EBML_ID_EBMLVERSION, EBML_NONE },
292 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
293 { 0 }
294 };
295
296 static EbmlSyntax ebml_syntax[] = {
297 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
298 { 0 }
299 };
300
301 static EbmlSyntax matroska_info[] = {
302 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
303 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
304 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
305 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
306 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
307 { MATROSKA_ID_DATEUTC, EBML_NONE },
308 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
309 { 0 }
310 };
311
312 static EbmlSyntax matroska_track_video[] = {
313 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
314 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width) },
315 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height) },
316 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
317 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
318 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, fourcc) },
319 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
320 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
321 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
322 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
323 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
324 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
325 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
326 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
327 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
328 { 0 }
329 };
330
331 static EbmlSyntax matroska_track_audio[] = {
332 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
333 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
334 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
335 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
336 { 0 }
337 };
338
339 static EbmlSyntax matroska_track_encoding_compression[] = {
340 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
341 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
342 { 0 }
343 };
344
345 static EbmlSyntax matroska_track_encoding[] = {
346 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
347 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
348 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
349 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
350 { 0 }
351 };
352
353 static EbmlSyntax matroska_track_encodings[] = {
354 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
355 { 0 }
356 };
357
358 static EbmlSyntax matroska_track[] = {
359 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
360 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
361 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
362 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
363 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
364 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
365 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
366 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
367 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
368 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
369 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
370 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
371 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
372 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
373 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
374 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
375 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
376 { MATROSKA_ID_CODECNAME, EBML_NONE },
377 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
378 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
379 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
380 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
381 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
382 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
383 { 0 }
384 };
385
386 static EbmlSyntax matroska_tracks[] = {
387 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
388 { 0 }
389 };
390
391 static EbmlSyntax matroska_attachment[] = {
392 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
393 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
394 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
395 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
396 { MATROSKA_ID_FILEDESC, EBML_NONE },
397 { 0 }
398 };
399
400 static EbmlSyntax matroska_attachments[] = {
401 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
402 { 0 }
403 };
404
405 static EbmlSyntax matroska_chapter_display[] = {
406 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
407 { MATROSKA_ID_CHAPLANG, EBML_NONE },
408 { 0 }
409 };
410
411 static EbmlSyntax matroska_chapter_entry[] = {
412 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
413 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
414 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
415 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
416 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
417 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
418 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
419 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
420 { 0 }
421 };
422
423 static EbmlSyntax matroska_chapter[] = {
424 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
425 { MATROSKA_ID_EDITIONUID, EBML_NONE },
426 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
427 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
428 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
429 { 0 }
430 };
431
432 static EbmlSyntax matroska_chapters[] = {
433 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
434 { 0 }
435 };
436
437 static EbmlSyntax matroska_index_pos[] = {
438 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
439 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
440 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
441 { 0 }
442 };
443
444 static EbmlSyntax matroska_index_entry[] = {
445 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
446 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
447 { 0 }
448 };
449
450 static EbmlSyntax matroska_index[] = {
451 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
452 { 0 }
453 };
454
455 static EbmlSyntax matroska_simpletag[] = {
456 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
457 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
458 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
459 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
460 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
461 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
462 { 0 }
463 };
464
465 static EbmlSyntax matroska_tagtargets[] = {
466 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
467 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
468 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
469 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
470 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
471 { 0 }
472 };
473
474 static EbmlSyntax matroska_tag[] = {
475 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
476 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
477 { 0 }
478 };
479
480 static EbmlSyntax matroska_tags[] = {
481 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
482 { 0 }
483 };
484
485 static EbmlSyntax matroska_seekhead_entry[] = {
486 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
487 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
488 { 0 }
489 };
490
491 static EbmlSyntax matroska_seekhead[] = {
492 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
493 { 0 }
494 };
495
496 static EbmlSyntax matroska_segment[] = {
497 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, { .n = matroska_info } },
498 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, { .n = matroska_tracks } },
499 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, { .n = matroska_attachments } },
500 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, { .n = matroska_chapters } },
501 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, { .n = matroska_index } },
502 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, { .n = matroska_tags } },
503 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, { .n = matroska_seekhead } },
504 { MATROSKA_ID_CLUSTER, EBML_STOP },
505 { 0 }
506 };
507
508 static EbmlSyntax matroska_segments[] = {
509 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
510 { 0 }
511 };
512
513 static EbmlSyntax matroska_blockgroup[] = {
514 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
515 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
516 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration), { .u = AV_NOPTS_VALUE } },
517 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock, reference) },
518 { MATROSKA_ID_CODECSTATE, EBML_NONE },
519 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
520 { 0 }
521 };
522
523 static EbmlSyntax matroska_cluster[] = {
524 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
525 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
526 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
527 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
528 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
529 { 0 }
530 };
531
532 static EbmlSyntax matroska_clusters[] = {
533 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
534 { MATROSKA_ID_INFO, EBML_NONE },
535 { MATROSKA_ID_CUES, EBML_NONE },
536 { MATROSKA_ID_TAGS, EBML_NONE },
537 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
538 { 0 }
539 };
540
541 static EbmlSyntax matroska_cluster_incremental_parsing[] = {
542 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
543 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
544 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
545 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
546 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
547 { MATROSKA_ID_INFO, EBML_NONE },
548 { MATROSKA_ID_CUES, EBML_NONE },
549 { MATROSKA_ID_TAGS, EBML_NONE },
550 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
551 { MATROSKA_ID_CLUSTER, EBML_STOP },
552 { 0 }
553 };
554
555 static EbmlSyntax matroska_cluster_incremental[] = {
556 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
557 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
558 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
559 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
560 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
561 { 0 }
562 };
563
564 static EbmlSyntax matroska_clusters_incremental[] = {
565 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
566 { MATROSKA_ID_INFO, EBML_NONE },
567 { MATROSKA_ID_CUES, EBML_NONE },
568 { MATROSKA_ID_TAGS, EBML_NONE },
569 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
570 { 0 }
571 };
572
573 static const char *const matroska_doctypes[] = { "matroska", "webm" };
574
575 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
576 {
577 AVIOContext *pb = matroska->ctx->pb;
578 uint32_t id;
579 matroska->current_id = 0;
580 matroska->num_levels = 0;
581
582 /* seek to next position to resync from */
583 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
584 goto eof;
585
586 id = avio_rb32(pb);
587
588 // try to find a toplevel element
589 while (!pb->eof_reached) {
590 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
591 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
592 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
593 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
594 matroska->current_id = id;
595 return 0;
596 }
597 id = (id << 8) | avio_r8(pb);
598 }
599
600 eof:
601 matroska->done = 1;
602 return AVERROR_EOF;
603 }
604
605 /*
606 * Return: Whether we reached the end of a level in the hierarchy or not.
607 */
608 static int ebml_level_end(MatroskaDemuxContext *matroska)
609 {
610 AVIOContext *pb = matroska->ctx->pb;
611 int64_t pos = avio_tell(pb);
612
613 if (matroska->num_levels > 0) {
614 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
615 if (pos - level->start >= level->length || matroska->current_id) {
616 matroska->num_levels--;
617 return 1;
618 }
619 }
620 return 0;
621 }
622
623 /*
624 * Read: an "EBML number", which is defined as a variable-length
625 * array of bytes. The first byte indicates the length by giving a
626 * number of 0-bits followed by a one. The position of the first
627 * "one" bit inside the first byte indicates the length of this
628 * number.
629 * Returns: number of bytes read, < 0 on error
630 */
631 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
632 int max_size, uint64_t *number)
633 {
634 int read = 1, n = 1;
635 uint64_t total = 0;
636
637 /* The first byte tells us the length in bytes - avio_r8() can normally
638 * return 0, but since that's not a valid first ebmlID byte, we can
639 * use it safely here to catch EOS. */
640 if (!(total = avio_r8(pb))) {
641 /* we might encounter EOS here */
642 if (!pb->eof_reached) {
643 int64_t pos = avio_tell(pb);
644 av_log(matroska->ctx, AV_LOG_ERROR,
645 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
646 pos, pos);
647 return pb->error ? pb->error : AVERROR(EIO);
648 }
649 return AVERROR_EOF;
650 }
651
652 /* get the length of the EBML number */
653 read = 8 - ff_log2_tab[total];
654 if (read > max_size) {
655 int64_t pos = avio_tell(pb) - 1;
656 av_log(matroska->ctx, AV_LOG_ERROR,
657 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
658 (uint8_t) total, pos, pos);
659 return AVERROR_INVALIDDATA;
660 }
661
662 /* read out length */
663 total ^= 1 << ff_log2_tab[total];
664 while (n++ < read)
665 total = (total << 8) | avio_r8(pb);
666
667 *number = total;
668
669 return read;
670 }
671
672 /**
673 * Read a EBML length value.
674 * This needs special handling for the "unknown length" case which has multiple
675 * encodings.
676 */
677 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
678 uint64_t *number)
679 {
680 int res = ebml_read_num(matroska, pb, 8, number);
681 if (res > 0 && *number + 1 == 1ULL << (7 * res))
682 *number = 0xffffffffffffffULL;
683 return res;
684 }
685
686 /*
687 * Read the next element as an unsigned int.
688 * 0 is success, < 0 is failure.
689 */
690 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
691 {
692 int n = 0;
693
694 if (size > 8)
695 return AVERROR_INVALIDDATA;
696
697 /* big-endian ordering; build up number */
698 *num = 0;
699 while (n++ < size)
700 *num = (*num << 8) | avio_r8(pb);
701
702 return 0;
703 }
704
705 /*
706 * Read the next element as a float.
707 * 0 is success, < 0 is failure.
708 */
709 static int ebml_read_float(AVIOContext *pb, int size, double *num)
710 {
711 if (size == 0)
712 *num = 0;
713 else if (size == 4)
714 *num = av_int2float(avio_rb32(pb));
715 else if (size == 8)
716 *num = av_int2double(avio_rb64(pb));
717 else
718 return AVERROR_INVALIDDATA;
719
720 return 0;
721 }
722
723 /*
724 * Read the next element as an ASCII string.
725 * 0 is success, < 0 is failure.
726 */
727 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
728 {
729 char *res;
730
731 /* EBML strings are usually not 0-terminated, so we allocate one
732 * byte more, read the string and NULL-terminate it ourselves. */
733 if (!(res = av_malloc(size + 1)))
734 return AVERROR(ENOMEM);
735 if (avio_read(pb, (uint8_t *) res, size) != size) {
736 av_free(res);
737 return AVERROR(EIO);
738 }
739 (res)[size] = '\0';
740 av_free(*str);
741 *str = res;
742
743 return 0;
744 }
745
746 /*
747 * Read the next element as binary data.
748 * 0 is success, < 0 is failure.
749 */
750 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
751 {
752 av_free(bin->data);
753 bin->size = 0;
754
755 if (!(bin->data = av_mallocz(length + AV_INPUT_BUFFER_PADDING_SIZE)))
756 return AVERROR(ENOMEM);
757
758 bin->pos = avio_tell(pb);
759 if (avio_read(pb, bin->data, length) != length) {
760 av_freep(&bin->data);
761 return AVERROR(EIO);
762 }
763
764 bin->size = length;
765
766 return 0;
767 }
768
769 /*
770 * Read the next element, but only the header. The contents
771 * are supposed to be sub-elements which can be read separately.
772 * 0 is success, < 0 is failure.
773 */
774 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
775 {
776 AVIOContext *pb = matroska->ctx->pb;
777 MatroskaLevel *level;
778
779 if (matroska->num_levels >= EBML_MAX_DEPTH) {
780 av_log(matroska->ctx, AV_LOG_ERROR,
781 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
782 return AVERROR(ENOSYS);
783 }
784
785 level = &matroska->levels[matroska->num_levels++];
786 level->start = avio_tell(pb);
787 level->length = length;
788
789 return 0;
790 }
791
792 /*
793 * Read signed/unsigned "EBML" numbers.
794 * Return: number of bytes processed, < 0 on error
795 */
796 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
797 uint8_t *data, uint32_t size, uint64_t *num)
798 {
799 AVIOContext pb;
800 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
801 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
802 }
803
804 /*
805 * Same as above, but signed.
806 */
807 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
808 uint8_t *data, uint32_t size, int64_t *num)
809 {
810 uint64_t unum;
811 int res;
812
813 /* read as unsigned number first */
814 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
815 return res;
816
817 /* make signed (weird way) */
818 *num = unum - ((1LL << (7 * res - 1)) - 1);
819
820 return res;
821 }
822
823 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
824 EbmlSyntax *syntax, void *data);
825
826 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
827 uint32_t id, void *data)
828 {
829 int i;
830 for (i = 0; syntax[i].id; i++)
831 if (id == syntax[i].id)
832 break;
833 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
834 matroska->num_levels > 0 &&
835 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
836 return 0; // we reached the end of an unknown size cluster
837 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
838 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%"PRIX32"\n", id);
839 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
840 return AVERROR_INVALIDDATA;
841 }
842 return ebml_parse_elem(matroska, &syntax[i], data);
843 }
844
845 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
846 void *data)
847 {
848 if (!matroska->current_id) {
849 uint64_t id;
850 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
851 if (res < 0)
852 return res;
853 matroska->current_id = id | 1 << 7 * res;
854 }
855 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
856 }
857
858 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
859 void *data)
860 {
861 int i, res = 0;
862
863 for (i = 0; syntax[i].id; i++)
864 switch (syntax[i].type) {
865 case EBML_UINT:
866 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
867 break;
868 case EBML_FLOAT:
869 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
870 break;
871 case EBML_STR:
872 case EBML_UTF8:
873 // the default may be NULL
874 if (syntax[i].def.s) {
875 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
876 *dst = av_strdup(syntax[i].def.s);
877 if (!*dst)
878 return AVERROR(ENOMEM);
879 }
880 break;
881 }
882
883 while (!res && !ebml_level_end(matroska))
884 res = ebml_parse(matroska, syntax, data);
885
886 return res;
887 }
888
889 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
890 EbmlSyntax *syntax, void *data)
891 {
892 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
893 [EBML_UINT] = 8,
894 [EBML_FLOAT] = 8,
895 // max. 16 MB for strings
896 [EBML_STR] = 0x1000000,
897 [EBML_UTF8] = 0x1000000,
898 // max. 256 MB for binary data
899 [EBML_BIN] = 0x10000000,
900 // no limits for anything else
901 };
902 AVIOContext *pb = matroska->ctx->pb;
903 uint32_t id = syntax->id;
904 uint64_t length;
905 int res;
906
907 data = (char *) data + syntax->data_offset;
908 if (syntax->list_elem_size) {
909 EbmlList *list = data;
910 if ((res = av_reallocp_array(&list->elem,
911 list->nb_elem + 1,
912 syntax->list_elem_size)) < 0) {
913 list->nb_elem = 0;
914 return res;
915 }
916 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
917 memset(data, 0, syntax->list_elem_size);
918 list->nb_elem++;
919 }
920
921 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
922 matroska->current_id = 0;
923 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
924 return res;
925 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
926 av_log(matroska->ctx, AV_LOG_ERROR,
927 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
928 length, max_lengths[syntax->type], syntax->type);
929 return AVERROR_INVALIDDATA;
930 }
931 }
932
933 switch (syntax->type) {
934 case EBML_UINT:
935 res = ebml_read_uint(pb, length, data);
936 break;
937 case EBML_FLOAT:
938 res = ebml_read_float(pb, length, data);
939 break;
940 case EBML_STR:
941 case EBML_UTF8:
942 res = ebml_read_ascii(pb, length, data);
943 break;
944 case EBML_BIN:
945 res = ebml_read_binary(pb, length, data);
946 break;
947 case EBML_NEST:
948 if ((res = ebml_read_master(matroska, length)) < 0)
949 return res;
950 if (id == MATROSKA_ID_SEGMENT)
951 matroska->segment_start = avio_tell(matroska->ctx->pb);
952 return ebml_parse_nest(matroska, syntax->def.n, data);
953 case EBML_PASS:
954 return ebml_parse_id(matroska, syntax->def.n, id, data);
955 case EBML_STOP:
956 return 1;
957 default:
958 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
959 }
960 if (res == AVERROR_INVALIDDATA)
961 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
962 else if (res == AVERROR(EIO))
963 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
964 return res;
965 }
966
967 static void ebml_free(EbmlSyntax *syntax, void *data)
968 {
969 int i, j;
970 for (i = 0; syntax[i].id; i++) {
971 void *data_off = (char *) data + syntax[i].data_offset;
972 switch (syntax[i].type) {
973 case EBML_STR:
974 case EBML_UTF8:
975 av_freep(data_off);
976 break;
977 case EBML_BIN:
978 av_freep(&((EbmlBin *) data_off)->data);
979 break;
980 case EBML_NEST:
981 if (syntax[i].list_elem_size) {
982 EbmlList *list = data_off;
983 char *ptr = list->elem;
984 for (j = 0; j < list->nb_elem;
985 j++, ptr += syntax[i].list_elem_size)
986 ebml_free(syntax[i].def.n, ptr);
987 av_free(list->elem);
988 } else
989 ebml_free(syntax[i].def.n, data_off);
990 default:
991 break;
992 }
993 }
994 }
995
996 /*
997 * Autodetecting...
998 */
999 static int matroska_probe(AVProbeData *p)
1000 {
1001 uint64_t total = 0;
1002 int len_mask = 0x80, size = 1, n = 1, i;
1003
1004 /* EBML header? */
1005 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1006 return 0;
1007
1008 /* length of header */
1009 total = p->buf[4];
1010 while (size <= 8 && !(total & len_mask)) {
1011 size++;
1012 len_mask >>= 1;
1013 }
1014 if (size > 8)
1015 return 0;
1016 total &= (len_mask - 1);
1017 while (n < size)
1018 total = (total << 8) | p->buf[4 + n++];
1019
1020 /* Does the probe data contain the whole header? */
1021 if (p->buf_size < 4 + size + total)
1022 return 0;
1023
1024 /* The header should contain a known document type. For now,
1025 * we don't parse the whole header but simply check for the
1026 * availability of that array of characters inside the header.
1027 * Not fully fool-proof, but good enough. */
1028 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1029 int probelen = strlen(matroska_doctypes[i]);
1030 if (total < probelen)
1031 continue;
1032 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1033 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1034 return AVPROBE_SCORE_MAX;
1035 }
1036
1037 // probably valid EBML header but no recognized doctype
1038 return AVPROBE_SCORE_EXTENSION;
1039 }
1040
1041 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1042 int num)
1043 {
1044 MatroskaTrack *tracks = matroska->tracks.elem;
1045 int i;
1046
1047 for (i = 0; i < matroska->tracks.nb_elem; i++)
1048 if (tracks[i].num == num)
1049 return &tracks[i];
1050
1051 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1052 return NULL;
1053 }
1054
1055 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1056 MatroskaTrack *track)
1057 {
1058 MatroskaTrackEncoding *encodings = track->encodings.elem;
1059 uint8_t *data = *buf;
1060 int isize = *buf_size;
1061 uint8_t *pkt_data = NULL;
1062 uint8_t av_unused *newpktdata;
1063 int pkt_size = isize;
1064 int result = 0;
1065 int olen;
1066
1067 if (pkt_size >= 10000000)
1068 return AVERROR_INVALIDDATA;
1069
1070 switch (encodings[0].compression.algo) {
1071 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1072 {
1073 int header_size = encodings[0].compression.settings.size;
1074 uint8_t *header = encodings[0].compression.settings.data;
1075
1076 if (!header_size)
1077 return 0;
1078
1079 pkt_size = isize + header_size;
1080 pkt_data = av_malloc(pkt_size);
1081 if (!pkt_data)
1082 return AVERROR(ENOMEM);
1083
1084 memcpy(pkt_data, header, header_size);
1085 memcpy(pkt_data + header_size, data, isize);
1086 break;
1087 }
1088 #if CONFIG_LZO
1089 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1090 do {
1091 olen = pkt_size *= 3;
1092 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1093 if (!newpktdata) {
1094 result = AVERROR(ENOMEM);
1095 goto failed;
1096 }
1097 pkt_data = newpktdata;
1098 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1099 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1100 if (result) {
1101 result = AVERROR_INVALIDDATA;
1102 goto failed;
1103 }
1104 pkt_size -= olen;
1105 break;
1106 #endif
1107 #if CONFIG_ZLIB
1108 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1109 {
1110 z_stream zstream = { 0 };
1111 if (inflateInit(&zstream) != Z_OK)
1112 return -1;
1113 zstream.next_in = data;
1114 zstream.avail_in = isize;
1115 do {
1116 pkt_size *= 3;
1117 newpktdata = av_realloc(pkt_data, pkt_size);
1118 if (!newpktdata) {
1119 inflateEnd(&zstream);
1120 goto failed;
1121 }
1122 pkt_data = newpktdata;
1123 zstream.avail_out = pkt_size - zstream.total_out;
1124 zstream.next_out = pkt_data + zstream.total_out;
1125 result = inflate(&zstream, Z_NO_FLUSH);
1126 } while (result == Z_OK && pkt_size < 10000000);
1127 pkt_size = zstream.total_out;
1128 inflateEnd(&zstream);
1129 if (result != Z_STREAM_END) {
1130 if (result == Z_MEM_ERROR)
1131 result = AVERROR(ENOMEM);
1132 else
1133 result = AVERROR_INVALIDDATA;
1134 goto failed;
1135 }
1136 break;
1137 }
1138 #endif
1139 #if CONFIG_BZLIB
1140 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1141 {
1142 bz_stream bzstream = { 0 };
1143 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1144 return -1;
1145 bzstream.next_in = data;
1146 bzstream.avail_in = isize;
1147 do {
1148 pkt_size *= 3;
1149 newpktdata = av_realloc(pkt_data, pkt_size);
1150 if (!newpktdata) {
1151 BZ2_bzDecompressEnd(&bzstream);
1152 goto failed;
1153 }
1154 pkt_data = newpktdata;
1155 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1156 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1157 result = BZ2_bzDecompress(&bzstream);
1158 } while (result == BZ_OK && pkt_size < 10000000);
1159 pkt_size = bzstream.total_out_lo32;
1160 BZ2_bzDecompressEnd(&bzstream);
1161 if (result != BZ_STREAM_END) {
1162 if (result == BZ_MEM_ERROR)
1163 result = AVERROR(ENOMEM);
1164 else
1165 result = AVERROR_INVALIDDATA;
1166 goto failed;
1167 }
1168 break;
1169 }
1170 #endif
1171 default:
1172 return AVERROR_INVALIDDATA;
1173 }
1174
1175 *buf = pkt_data;
1176 *buf_size = pkt_size;
1177 return 0;
1178
1179 failed:
1180 av_free(pkt_data);
1181 return result;
1182 }
1183
1184 static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
1185 AVPacket *pkt, uint64_t display_duration)
1186 {
1187 AVBufferRef *line;
1188 char *layer, *ptr = pkt->data, *end = ptr + pkt->size;
1189
1190 for (; *ptr != ',' && ptr < end - 1; ptr++)
1191 ;
1192 if (*ptr == ',')
1193 layer = ++ptr;
1194 for (; *ptr != ',' && ptr < end - 1; ptr++)
1195 ;
1196 if (*ptr == ',') {
1197 int64_t end_pts = pkt->pts + display_duration;
1198 int sc = matroska->time_scale * pkt->pts / 10000000;
1199 int ec = matroska->time_scale * end_pts / 10000000;
1200 int sh, sm, ss, eh, em, es, len;
1201 sh = sc / 360000;
1202 sc -= 360000 * sh;
1203 sm = sc / 6000;
1204 sc -= 6000 * sm;
1205 ss = sc / 100;
1206 sc -= 100 * ss;
1207 eh = ec / 360000;
1208 ec -= 360000 * eh;
1209 em = ec / 6000;
1210 ec -= 6000 * em;
1211 es = ec / 100;
1212 ec -= 100 * es;
1213 *ptr++ = '\0';
1214 len = 50 + end - ptr + AV_INPUT_BUFFER_PADDING_SIZE;
1215 if (!(line = av_buffer_alloc(len)))
1216 return;
1217 snprintf(line->data, len,
1218 "Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
1219 layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
1220 av_buffer_unref(&pkt->buf);
1221 pkt->buf = line;
1222 pkt->data = line->data;
1223 pkt->size = strlen(line->data);
1224 }
1225 }
1226
1227 static int matroska_merge_packets(AVPacket *out, AVPacket *in)
1228 {
1229 int old_size = out->size;
1230 int ret = av_grow_packet(out, in->size);
1231 if (ret < 0)
1232 return ret;
1233
1234 memcpy(out->data + old_size, in->data, in->size);
1235
1236 av_packet_unref(in);
1237 av_free(in);
1238 return 0;
1239 }
1240
1241 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1242 AVDictionary **metadata, char *prefix)
1243 {
1244 MatroskaTag *tags = list->elem;
1245 char key[1024];
1246 int i;
1247
1248 for (i = 0; i < list->nb_elem; i++) {
1249 const char *lang = tags[i].lang &&
1250 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1251
1252 if (!tags[i].name) {
1253 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1254 continue;
1255 }
1256 if (prefix)
1257 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1258 else
1259 av_strlcpy(key, tags[i].name, sizeof(key));
1260 if (tags[i].def || !lang) {
1261 av_dict_set(metadata, key, tags[i].string, 0);
1262 if (tags[i].sub.nb_elem)
1263 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1264 }
1265 if (lang) {
1266 av_strlcat(key, "-", sizeof(key));
1267 av_strlcat(key, lang, sizeof(key));
1268 av_dict_set(metadata, key, tags[i].string, 0);
1269 if (tags[i].sub.nb_elem)
1270 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1271 }
1272 }
1273 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1274 }
1275
1276 static void matroska_convert_tags(AVFormatContext *s)
1277 {
1278 MatroskaDemuxContext *matroska = s->priv_data;
1279 MatroskaTags *tags = matroska->tags.elem;
1280 int i, j;
1281
1282 for (i = 0; i < matroska->tags.nb_elem; i++) {
1283 if (tags[i].target.attachuid) {
1284 MatroskaAttachment *attachment = matroska->attachments.elem;
1285 int found = 0;
1286 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1287 if (attachment[j].uid == tags[i].target.attachuid &&
1288 attachment[j].stream) {
1289 matroska_convert_tag(s, &tags[i].tag,
1290 &attachment[j].stream->metadata, NULL);
1291 found = 1;
1292 }
1293 }
1294 if (!found) {
1295 av_log(NULL, AV_LOG_WARNING,
1296 "The tags at index %d refer to a "
1297 "non-existent attachment %"PRId64".\n",
1298 i, tags[i].target.attachuid);
1299 }
1300 } else if (tags[i].target.chapteruid) {
1301 MatroskaChapter *chapter = matroska->chapters.elem;
1302 int found = 0;
1303 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1304 if (chapter[j].uid == tags[i].target.chapteruid &&
1305 chapter[j].chapter) {
1306 matroska_convert_tag(s, &tags[i].tag,
1307 &chapter[j].chapter->metadata, NULL);
1308 found = 1;
1309 }
1310 }
1311 if (!found) {
1312 av_log(NULL, AV_LOG_WARNING,
1313 "The tags at index %d refer to a non-existent chapter "
1314 "%"PRId64".\n",
1315 i, tags[i].target.chapteruid);
1316 }
1317 } else if (tags[i].target.trackuid) {
1318 MatroskaTrack *track = matroska->tracks.elem;
1319 int found = 0;
1320 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1321 if (track[j].uid == tags[i].target.trackuid &&
1322 track[j].stream) {
1323 matroska_convert_tag(s, &tags[i].tag,
1324 &track[j].stream->metadata, NULL);
1325 found = 1;
1326 }
1327 }
1328 if (!found) {
1329 av_log(NULL, AV_LOG_WARNING,
1330 "The tags at index %d refer to a non-existent track "
1331 "%"PRId64".\n",
1332 i, tags[i].target.trackuid);
1333 }
1334 } else {
1335 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1336 tags[i].target.type);
1337 }
1338 }
1339 }
1340
1341 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1342 int idx)
1343 {
1344 EbmlList *seekhead_list = &matroska->seekhead;
1345 uint32_t level_up = matroska->level_up;
1346 uint32_t saved_id = matroska->current_id;
1347 MatroskaSeekhead *seekhead = seekhead_list->elem;
1348 int64_t before_pos = avio_tell(matroska->ctx->pb);
1349 MatroskaLevel level;
1350 int64_t offset;
1351 int ret = 0;
1352
1353 if (idx >= seekhead_list->nb_elem ||
1354 seekhead[idx].id == MATROSKA_ID_SEEKHEAD ||
1355 seekhead[idx].id == MATROSKA_ID_CLUSTER)
1356 return 0;
1357
1358 /* seek */
1359 offset = seekhead[idx].pos + matroska->segment_start;
1360 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1361 /* We don't want to lose our seekhead level, so we add
1362 * a dummy. This is a crude hack. */
1363 if (matroska->num_levels == EBML_MAX_DEPTH) {
1364 av_log(matroska->ctx, AV_LOG_INFO,
1365 "Max EBML element depth (%d) reached, "
1366 "cannot parse further.\n", EBML_MAX_DEPTH);
1367 ret = AVERROR_INVALIDDATA;
1368 } else {
1369 level.start = 0;
1370 level.length = (uint64_t) -1;
1371 matroska->levels[matroska->num_levels] = level;
1372 matroska->num_levels++;
1373 matroska->current_id = 0;
1374
1375 ret = ebml_parse(matroska, matroska_segment, matroska);
1376
1377 /* remove dummy level */
1378 while (matroska->num_levels) {
1379 uint64_t length = matroska->levels[--matroska->num_levels].length;
1380 if (length == (uint64_t) -1)
1381 break;
1382 }
1383 }
1384 }
1385 /* seek back */
1386 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1387 matroska->level_up = level_up;
1388 matroska->current_id = saved_id;
1389
1390 return ret;
1391 }
1392
1393 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1394 {
1395 EbmlList *seekhead_list = &matroska->seekhead;
1396 int64_t before_pos = avio_tell(matroska->ctx->pb);
1397 int i;
1398
1399 // we should not do any seeking in the streaming case
1400 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1401 (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
1402 return;
1403
1404 for (i = 0; i < seekhead_list->nb_elem; i++) {
1405 MatroskaSeekhead *seekhead = seekhead_list->elem;
1406 if (seekhead[i].pos <= before_pos)
1407 continue;
1408
1409 // defer cues parsing until we actually need cue data.
1410 if (seekhead[i].id == MATROSKA_ID_CUES) {
1411 matroska->cues_parsing_deferred = 1;
1412 continue;
1413 }
1414
1415 if (matroska_parse_seekhead_entry(matroska, i) < 0)
1416 break;
1417 }
1418 }
1419
1420 static void matroska_parse_cues(MatroskaDemuxContext *matroska)
1421 {
1422 EbmlList *seekhead_list = &matroska->seekhead;
1423 MatroskaSeekhead *seekhead = seekhead_list->elem;
1424 EbmlList *index_list;
1425 MatroskaIndex *index;
1426 int index_scale = 1;
1427 int i, j;
1428
1429 for (i = 0; i < seekhead_list->nb_elem; i++)
1430 if (seekhead[i].id == MATROSKA_ID_CUES)
1431 break;
1432 assert(i <= seekhead_list->nb_elem);
1433
1434 matroska_parse_seekhead_entry(matroska, i);
1435
1436 index_list = &matroska->index;
1437 index = index_list->elem;
1438 if (index_list->nb_elem &&
1439 index[0].time > 1E14 / matroska->time_scale) {
1440 av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
1441 index_scale = matroska->time_scale;
1442 }
1443 for (i = 0; i < index_list->nb_elem; i++) {
1444 EbmlList *pos_list = &index[i].pos;
1445 MatroskaIndexPos *pos = pos_list->elem;
1446 for (j = 0; j < pos_list->nb_elem; j++) {
1447 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1448 pos[j].track);
1449 if (track && track->stream)
1450 av_add_index_entry(track->stream,
1451 pos[j].pos + matroska->segment_start,
1452 index[i].time / index_scale, 0, 0,
1453 AVINDEX_KEYFRAME);
1454 }
1455 }
1456 }
1457
1458 static int matroska_aac_profile(char *codec_id)
1459 {
1460 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1461 int profile;
1462
1463 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1464 if (strstr(codec_id, aac_profiles[profile]))
1465 break;
1466 return profile + 1;
1467 }
1468
1469 static int matroska_aac_sri(int samplerate)
1470 {
1471 int sri;
1472
1473 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1474 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1475 break;
1476 return sri;
1477 }
1478
1479 static int matroska_parse_flac(AVFormatContext *s,
1480 MatroskaTrack *track,
1481 int *offset)
1482 {
1483 AVStream *st = track->stream;
1484 uint8_t *p = track->codec_priv.data;
1485 int size = track->codec_priv.size;
1486
1487 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1488 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1489 track->codec_priv.size = 0;
1490 return 0;
1491 }
1492 *offset = 8;
1493 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1494
1495 p += track->codec_priv.size;
1496 size -= track->codec_priv.size;
1497
1498 /* parse the remaining metadata blocks if present */
1499 while (size >= 4) {
1500 int block_last, block_type, block_size;
1501
1502 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1503
1504 p += 4;
1505 size -= 4;
1506 if (block_size > size)
1507 return 0;
1508
1509 /* check for the channel mask */
1510 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1511 AVDictionary *dict = NULL;
1512 AVDictionaryEntry *chmask;
1513
1514 ff_vorbis_comment(s, &dict, p, block_size, 0);
1515 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1516 if (chmask) {
1517 uint64_t mask = strtol(chmask->value, NULL, 0);
1518 if (!mask || mask & ~0x3ffffULL) {
1519 av_log(s, AV_LOG_WARNING,
1520 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1521 } else
1522 st->codecpar->channel_layout = mask;
1523 }
1524 av_dict_free(&dict);
1525 }
1526
1527 p += block_size;
1528 size -= block_size;
1529 }
1530
1531 return 0;
1532 }
1533
1534 static int mkv_field_order(int64_t field_order)
1535 {
1536 switch (field_order) {
1537 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1538 return AV_FIELD_PROGRESSIVE;
1539 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1540 return AV_FIELD_UNKNOWN;
1541 case MATROSKA_VIDEO_FIELDORDER_TT:
1542 return AV_FIELD_TT;
1543 case MATROSKA_VIDEO_FIELDORDER_BB:
1544 return AV_FIELD_BB;
1545 case MATROSKA_VIDEO_FIELDORDER_BT:
1546 return AV_FIELD_BT;
1547 case MATROSKA_VIDEO_FIELDORDER_TB:
1548 return AV_FIELD_TB;
1549 default:
1550 return AV_FIELD_UNKNOWN;
1551 }
1552 }
1553
1554 static void mkv_stereo_mode_display_mul(int stereo_mode,
1555 int *h_width, int *h_height)
1556 {
1557 switch (stereo_mode) {
1558 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1559 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1560 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1561 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1562 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1563 break;
1564 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1565 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1566 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1567 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1568 *h_width = 2;
1569 break;
1570 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1571 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1572 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1573 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1574 *h_height = 2;
1575 break;
1576 }
1577 }
1578
1579 static int matroska_parse_tracks(AVFormatContext *s)
1580 {
1581 MatroskaDemuxContext *matroska = s->priv_data;
1582 MatroskaTrack *tracks = matroska->tracks.elem;
1583 AVStream *st;
1584 int i, j, ret;
1585
1586 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1587 MatroskaTrack *track = &tracks[i];
1588 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1589 EbmlList *encodings_list = &track->encodings;
1590 MatroskaTrackEncoding *encodings = encodings_list->elem;
1591 uint8_t *extradata = NULL;
1592 int extradata_size = 0;
1593 int extradata_offset = 0;
1594 AVIOContext b;
1595
1596 /* Apply some sanity checks. */
1597 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1598 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1599 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1600 av_log(matroska->ctx, AV_LOG_INFO,
1601 "Unknown or unsupported track type %"PRIu64"\n",
1602 track->type);
1603 continue;
1604 }
1605 if (!track->codec_id)
1606 continue;
1607
1608 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1609 if (!track->default_duration && track->video.frame_rate > 0)
1610 track->default_duration = 1000000000 / track->video.frame_rate;
1611 if (!track->video.display_width)
1612 track->video.display_width = track->video.pixel_width;
1613 if (!track->video.display_height)
1614 track->video.display_height = track->video.pixel_height;
1615 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1616 if (!track->audio.out_samplerate)
1617 track->audio.out_samplerate = track->audio.samplerate;
1618 }
1619 if (encodings_list->nb_elem > 1) {
1620 av_log(matroska->ctx, AV_LOG_ERROR,
1621 "Multiple combined encodings not supported");
1622 } else if (encodings_list->nb_elem == 1) {
1623 if (encodings[0].type ||
1624 (
1625 #if CONFIG_ZLIB
1626 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1627 #endif
1628 #if CONFIG_BZLIB
1629 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1630 #endif
1631 #if CONFIG_LZO
1632 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1633 #endif
1634 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP)) {
1635 encodings[0].scope = 0;
1636 av_log(matroska->ctx, AV_LOG_ERROR,
1637 "Unsupported encoding type");
1638 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1639 uint8_t *codec_priv = track->codec_priv.data;
1640 int ret = matroska_decode_buffer(&track->codec_priv.data,
1641 &track->codec_priv.size,
1642 track);
1643 if (ret < 0) {
1644 track->codec_priv.data = NULL;
1645 track->codec_priv.size = 0;
1646 av_log(matroska->ctx, AV_LOG_ERROR,
1647 "Failed to decode codec private data\n");
1648 }
1649
1650 if (codec_priv != track->codec_priv.data)
1651 av_free(codec_priv);
1652 }
1653 }
1654
1655 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1656 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1657 strlen(ff_mkv_codec_tags[j].str))) {
1658 codec_id = ff_mkv_codec_tags[j].id;
1659 break;
1660 }
1661 }
1662
1663 st = track->stream = avformat_new_stream(s, NULL);
1664 if (!st)
1665 return AVERROR(ENOMEM);
1666
1667 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1668 track->codec_priv.size >= 40 &&
1669 track->codec_priv.data) {
1670 track->ms_compat = 1;
1671 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1672 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
1673 track->video.fourcc);
1674 extradata_offset = 40;
1675 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
1676 track->codec_priv.size >= 14 &&
1677 track->codec_priv.data) {
1678 int ret;
1679 ffio_init_context(&b, track->codec_priv.data,
1680 track->codec_priv.size,
1681 0, NULL, NULL, NULL, NULL);
1682 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size);
1683 if (ret < 0)
1684 return ret;
1685 codec_id = st->codecpar->codec_id;
1686 extradata_offset = FFMIN(track->codec_priv.size, 18);
1687 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
1688 (track->codec_priv.size >= 86) &&
1689 (track->codec_priv.data)) {
1690 if (track->codec_priv.size == AV_RB32(track->codec_priv.data)) {
1691 track->video.fourcc = AV_RL32(track->codec_priv.data + 4);
1692 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1693 track->video.fourcc);
1694 }
1695 if (codec_id == AV_CODEC_ID_NONE) {
1696 track->video.fourcc = AV_RL32(track->codec_priv.data);
1697 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
1698 track->video.fourcc);
1699 }
1700 if (codec_id == AV_CODEC_ID_NONE) {
1701 char buf[32];
1702 av_get_codec_tag_string(buf, sizeof(buf), track->video.fourcc);
1703 av_log(matroska->ctx, AV_LOG_ERROR,
1704 "mov FourCC not found %s.\n", buf);
1705 }
1706 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
1707 switch (track->audio.bitdepth) {
1708 case 8:
1709 codec_id = AV_CODEC_ID_PCM_U8;
1710 break;
1711 case 24:
1712 codec_id = AV_CODEC_ID_PCM_S24BE;
1713 break;
1714 case 32:
1715 codec_id = AV_CODEC_ID_PCM_S32BE;
1716 break;
1717 }
1718 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
1719 switch (track->audio.bitdepth) {
1720 case 8:
1721 codec_id = AV_CODEC_ID_PCM_U8;
1722 break;
1723 case 24:
1724 codec_id = AV_CODEC_ID_PCM_S24LE;
1725 break;
1726 case 32:
1727 codec_id = AV_CODEC_ID_PCM_S32LE;
1728 break;
1729 }
1730 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
1731 track->audio.bitdepth == 64) {
1732 codec_id = AV_CODEC_ID_PCM_F64LE;
1733 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
1734 int profile = matroska_aac_profile(track->codec_id);
1735 int sri = matroska_aac_sri(track->audio.samplerate);
1736 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
1737 if (!extradata)
1738 return AVERROR(ENOMEM);
1739 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
1740 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
1741 if (strstr(track->codec_id, "SBR")) {
1742 sri = matroska_aac_sri(track->audio.out_samplerate);
1743 extradata[2] = 0x56;
1744 extradata[3] = 0xE5;
1745 extradata[4] = 0x80 | (sri << 3);
1746 extradata_size = 5;
1747 } else
1748 extradata_size = 2;
1749 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size) {
1750 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1751 * Create the "atom size", "tag", and "tag version" fields the
1752 * decoder expects manually. */
1753 extradata_size = 12 + track->codec_priv.size;
1754 extradata = av_mallocz(extradata_size +
1755 AV_INPUT_BUFFER_PADDING_SIZE);
1756 if (!extradata)
1757 return AVERROR(ENOMEM);
1758 AV_WB32(extradata, extradata_size);
1759 memcpy(&extradata[4], "alac", 4);
1760 AV_WB32(&extradata[8], 0);
1761 memcpy(&extradata[12], track->codec_priv.data,
1762 track->codec_priv.size);
1763 } else if (codec_id == AV_CODEC_ID_TTA) {
1764 extradata_size = 30;
1765 extradata = av_mallocz(extradata_size);
1766 if (!extradata)
1767 return AVERROR(ENOMEM);
1768 ffio_init_context(&b, extradata, extradata_size, 1,
1769 NULL, NULL, NULL, NULL);
1770 avio_write(&b, "TTA1", 4);
1771 avio_wl16(&b, 1);
1772 avio_wl16(&b, track->audio.channels);
1773 avio_wl16(&b, track->audio.bitdepth);
1774 avio_wl32(&b, track->audio.out_samplerate);
1775 avio_wl32(&b, matroska->ctx->duration *
1776 track->audio.out_samplerate);
1777 } else if (codec_id == AV_CODEC_ID_RV10 ||
1778 codec_id == AV_CODEC_ID_RV20 ||
1779 codec_id == AV_CODEC_ID_RV30 ||
1780 codec_id == AV_CODEC_ID_RV40) {
1781 extradata_offset = 26;
1782 } else if (codec_id == AV_CODEC_ID_RA_144) {
1783 track->audio.out_samplerate = 8000;
1784 track->audio.channels = 1;
1785 } else if (codec_id == AV_CODEC_ID_RA_288 ||
1786 codec_id == AV_CODEC_ID_COOK ||
1787 codec_id == AV_CODEC_ID_ATRAC3 ||
1788 codec_id == AV_CODEC_ID_SIPR) {
1789 int flavor;
1790 ffio_init_context(&b, track->codec_priv.data,
1791 track->codec_priv.size,
1792 0, NULL, NULL, NULL, NULL);
1793 avio_skip(&b, 22);
1794 flavor = avio_rb16(&b);
1795 track->audio.coded_framesize = avio_rb32(&b);
1796 avio_skip(&b, 12);
1797 track->audio.sub_packet_h = avio_rb16(&b);
1798 track->audio.frame_size = avio_rb16(&b);
1799 track->audio.sub_packet_size = avio_rb16(&b);
1800 if (flavor <= 0 ||
1801 track->audio.coded_framesize <= 0 ||
1802 track->audio.sub_packet_h <= 0 ||
1803 track->audio.frame_size <= 0 ||
1804 track->audio.sub_packet_size <= 0)
1805 return AVERROR_INVALIDDATA;
1806 track->audio.buf = av_malloc(track->audio.frame_size *
1807 track->audio.sub_packet_h);
1808 if (!track->audio.buf)
1809 return AVERROR(ENOMEM);
1810 if (codec_id == AV_CODEC_ID_RA_288) {
1811 st->codecpar->block_align = track->audio.coded_framesize;
1812 track->codec_priv.size = 0;
1813 } else {
1814 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
1815 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
1816 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
1817 st->codecpar->bit_rate = sipr_bit_rate[flavor];
1818 }
1819 st->codecpar->block_align = track->audio.sub_packet_size;
1820 extradata_offset = 78;
1821 }
1822 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
1823 ret = matroska_parse_flac(s, track, &extradata_offset);
1824 if (ret < 0)
1825 return ret;
1826 }
1827 track->codec_priv.size -= extradata_offset;
1828
1829 if (codec_id == AV_CODEC_ID_NONE)
1830 av_log(matroska->ctx, AV_LOG_INFO,
1831 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
1832
1833 if (track->time_scale < 0.01)
1834 track->time_scale = 1.0;
1835 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
1836 1000 * 1000 * 1000); /* 64 bit pts in ns */
1837
1838 if (track->type == MATROSKA_TRACK_TYPE_AUDIO &&
1839 track->audio.out_samplerate) {
1840 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
1841 (AVRational){ 1, 1000000000 },
1842 (AVRational){ 1, track->audio.out_samplerate });
1843 }
1844
1845 /* convert the delay from ns to the track timebase */
1846 track->codec_delay = av_rescale_q(track->codec_delay,
1847 (AVRational){ 1, 1000000000 },
1848 st->time_base);
1849
1850 st->codecpar->codec_id = codec_id;
1851 st->start_time = 0;
1852 if (strcmp(track->language, "und"))
1853 av_dict_set(&st->metadata, "language", track->language, 0);
1854 av_dict_set(&st->metadata, "title", track->name, 0);
1855
1856 if (track->flag_default)
1857 st->disposition |= AV_DISPOSITION_DEFAULT;
1858 if (track->flag_forced)
1859 st->disposition |= AV_DISPOSITION_FORCED;
1860
1861 if (!st->codecpar->extradata) {
1862 if (extradata) {
1863 st->codecpar->extradata = extradata;
1864 st->codecpar->extradata_size = extradata_size;
1865 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
1866 st->codecpar->extradata = av_mallocz(track->codec_priv.size +
1867 AV_INPUT_BUFFER_PADDING_SIZE);
1868 if (!st->codecpar->extradata)
1869 return AVERROR(ENOMEM);
1870 st->codecpar->extradata_size = track->codec_priv.size;
1871 memcpy(st->codecpar->extradata,
1872 track->codec_priv.data + extradata_offset,
1873 track->codec_priv.size);
1874 }
1875 }
1876
1877 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1878 int display_width_mul = 1;
1879 int display_height_mul = 1;
1880
1881 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1882 st->codecpar->codec_tag = track->video.fourcc;
1883 st->codecpar->width = track->video.pixel_width;
1884 st->codecpar->height = track->video.pixel_height;
1885
1886 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
1887 st->codecpar->field_order = mkv_field_order(track->video.field_order);
1888
1889 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1890 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
1891
1892 av_reduce(&st->sample_aspect_ratio.num,
1893 &st->sample_aspect_ratio.den,
1894 st->codecpar->height * track->video.display_width * display_width_mul,
1895 st->codecpar->width * track->video.display_height * display_height_mul,
1896 255);
1897 if (st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1898 st->codecpar->codec_id != AV_CODEC_ID_HEVC)
1899 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1900 if (track->default_duration) {
1901 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1902 1000000000, track->default_duration, 30000);
1903 }
1904 // add stream level stereo3d side data if it is a supported format
1905 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1906 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
1907 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
1908 if (ret < 0)
1909 return ret;
1910 }
1911 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1912 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1913 st->codecpar->sample_rate = track->audio.out_samplerate;
1914 st->codecpar->channels = track->audio.channels;
1915 if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
1916 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1917 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
1918 st->need_parsing = AVSTREAM_PARSE_FULL;
1919 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1920 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1921 if (st->codecpar->codec_id == AV_CODEC_ID_SSA)
1922 matroska->contains_ssa = 1;
1923 }
1924 }
1925
1926 return 0;
1927 }
1928
1929 static int matroska_read_header(AVFormatContext *s)
1930 {
1931 MatroskaDemuxContext *matroska = s->priv_data;
1932 EbmlList *attachments_list = &matroska->attachments;
1933 EbmlList *chapters_list = &matroska->chapters;
1934 MatroskaAttachment *attachments;
1935 MatroskaChapter *chapters;
1936 uint64_t max_start = 0;
1937 int64_t pos;
1938 Ebml ebml = { 0 };
1939 int i, j, res;
1940
1941 matroska->ctx = s;
1942
1943 /* First read the EBML header. */
1944 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
1945 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
1946 ebml_free(ebml_syntax, &ebml);
1947 return AVERROR_INVALIDDATA;
1948 }
1949 if (ebml.version > EBML_VERSION ||
1950 ebml.max_size > sizeof(uint64_t) ||
1951 ebml.id_length > sizeof(uint32_t) ||
1952 ebml.doctype_version > 3) {
1953 avpriv_report_missing_feature(matroska->ctx,
1954 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
1955 ebml.version, ebml.doctype, ebml.doctype_version);
1956 ebml_free(ebml_syntax, &ebml);
1957 return AVERROR_PATCHWELCOME;
1958 }
1959 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
1960 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
1961 break;
1962 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
1963 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
1964 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
1965 ebml_free(ebml_syntax, &ebml);
1966 return AVERROR_INVALIDDATA;
1967 }
1968 }
1969 ebml_free(ebml_syntax, &ebml);
1970
1971 /* The next thing is a segment. */
1972 pos = avio_tell(matroska->ctx->pb);
1973 res = ebml_parse(matroska, matroska_segments, matroska);
1974 // try resyncing until we find a EBML_STOP type element.
1975 while (res != 1) {
1976 res = matroska_resync(matroska, pos);
1977 if (res < 0)
1978 return res;
1979 pos = avio_tell(matroska->ctx->pb);
1980 res = ebml_parse(matroska, matroska_segment, matroska);
1981 }
1982 matroska_execute_seekhead(matroska);
1983
1984 if (!matroska->time_scale)
1985 matroska->time_scale = 1000000;
1986 if (matroska->duration)
1987 matroska->ctx->duration = matroska->duration * matroska->time_scale *
1988 1000 / AV_TIME_BASE;
1989 av_dict_set(&s->metadata, "title", matroska->title, 0);
1990
1991 res = matroska_parse_tracks(s);
1992 if (res < 0)
1993 return res;
1994
1995 attachments = attachments_list->elem;
1996 for (j = 0; j < attachments_list->nb_elem; j++) {
1997 if (!(attachments[j].filename && attachments[j].mime &&
1998 attachments[j].bin.data && attachments[j].bin.size > 0)) {
1999 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2000 } else {
2001 AVStream *st = avformat_new_stream(s, NULL);
2002 if (!st)
2003 break;
2004 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2005 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2006 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2007
2008 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2009 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2010 strlen(ff_mkv_image_mime_tags[i].str))) {
2011 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2012 break;
2013 }
2014 }
2015
2016 attachments[j].stream = st;
2017
2018 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2019 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2020 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2021
2022 av_init_packet(&st->attached_pic);
2023 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2024 return res;
2025 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2026 st->attached_pic.stream_index = st->index;
2027 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2028 } else {
2029 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2030 st->codecpar->extradata = av_malloc(attachments[j].bin.size);
2031 if (!st->codecpar->extradata)
2032 break;
2033
2034 st->codecpar->extradata_size = attachments[j].bin.size;
2035 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2036 attachments[j].bin.size);
2037
2038 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2039 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2040 strlen(ff_mkv_mime_tags[i].str))) {
2041 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2042 break;
2043 }
2044 }
2045 }
2046 }
2047 }
2048
2049 chapters = chapters_list->elem;
2050 for (i = 0; i < chapters_list->nb_elem; i++)
2051 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2052 (max_start == 0 || chapters[i].start > max_start)) {
2053 chapters[i].chapter =
2054 avpriv_new_chapter(s, chapters[i].uid,
2055 (AVRational) { 1, 1000000000 },
2056 chapters[i].start, chapters[i].end,
2057 chapters[i].title);
2058 av_dict_set(&chapters[i].chapter->metadata,
2059 "title", chapters[i].title, 0);
2060 max_start = chapters[i].start;
2061 }
2062
2063 matroska_convert_tags(s);
2064
2065 return 0;
2066 }
2067
2068 /*
2069 * Put one packet in an application-supplied AVPacket struct.
2070 * Returns 0 on success or -1 on failure.
2071 */
2072 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2073 AVPacket *pkt)
2074 {
2075 if (matroska->num_packets > 0) {
2076 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2077 av_free(matroska->packets[0]);
2078 if (matroska->num_packets > 1) {
2079 void *newpackets;
2080 memmove(&matroska->packets[0], &matroska->packets[1],
2081 (matroska->num_packets - 1) * sizeof(AVPacket *));
2082 newpackets = av_realloc(matroska->packets,
2083 (matroska->num_packets - 1) *
2084 sizeof(AVPacket *));
2085 if (newpackets)
2086 matroska->packets = newpackets;
2087 } else {
2088 av_freep(&matroska->packets);
2089 matroska->prev_pkt = NULL;
2090 }
2091 matroska->num_packets--;
2092 return 0;
2093 }
2094
2095 return -1;
2096 }
2097
2098 /*
2099 * Free all packets in our internal queue.
2100 */
2101 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2102 {
2103 matroska->prev_pkt = NULL;
2104 if (matroska->packets) {
2105 int n;
2106 for (n = 0; n < matroska->num_packets; n++) {
2107 av_packet_unref(matroska->packets[n]);
2108 av_free(matroska->packets[n]);
2109 }
2110 av_freep(&matroska->packets);
2111 matroska->num_packets = 0;
2112 }
2113 }
2114
2115 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2116 int *buf_size, int type,
2117 uint32_t **lace_buf, int *laces)
2118 {
2119 int res = 0, n, size = *buf_size;
2120 uint8_t *data = *buf;
2121 uint32_t *lace_size;
2122
2123 if (!type) {
2124 *laces = 1;
2125 *lace_buf = av_mallocz(sizeof(int));
2126 if (!*lace_buf)
2127 return AVERROR(ENOMEM);
2128
2129 *lace_buf[0] = size;
2130 return 0;
2131 }
2132
2133 assert(size > 0);
2134 *laces = *data + 1;
2135 data += 1;
2136 size -= 1;
2137 lace_size = av_mallocz(*laces * sizeof(int));
2138 if (!lace_size)
2139 return AVERROR(ENOMEM);
2140
2141 switch (type) {
2142 case 0x1: /* Xiph lacing */
2143 {
2144 uint8_t temp;
2145 uint32_t total = 0;
2146 for (n = 0; res == 0 && n < *laces - 1; n++) {
2147 while (1) {
2148 if (size == 0) {
2149 res = AVERROR_EOF;
2150 break;
2151 }
2152 temp = *data;
2153 lace_size[n] += temp;
2154 data += 1;
2155 size -= 1;
2156 if (temp != 0xff)
2157 break;
2158 }
2159 total += lace_size[n];
2160 }
2161 if (size <= total) {
2162 res = AVERROR_INVALIDDATA;
2163 break;
2164 }
2165
2166 lace_size[n] = size - total;
2167 break;
2168 }
2169
2170 case 0x2: /* fixed-size lacing */
2171 if (size % (*laces)) {
2172 res = AVERROR_INVALIDDATA;
2173 break;
2174 }
2175 for (n = 0; n < *laces; n++)
2176 lace_size[n] = size / *laces;
2177 break;
2178
2179 case 0x3: /* EBML lacing */
2180 {
2181 uint64_t num;
2182 uint64_t total;
2183 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2184 if (n < 0) {
2185 av_log(matroska->ctx, AV_LOG_INFO,
2186 "EBML block data error\n");
2187 res = n;
2188 break;
2189 }
2190 data += n;
2191 size -= n;
2192 total = lace_size[0] = num;
2193 for (n = 1; res == 0 && n < *laces - 1; n++) {
2194 int64_t snum;
2195 int r;
2196 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2197 if (r < 0) {
2198 av_log(matroska->ctx, AV_LOG_INFO,
2199 "EBML block data error\n");
2200 res = r;
2201 break;
2202 }
2203 data += r;
2204 size -= r;
2205 lace_size[n] = lace_size[n - 1] + snum;
2206 total += lace_size[n];
2207 }
2208 if (size <= total) {
2209 res = AVERROR_INVALIDDATA;
2210 break;
2211 }
2212 lace_size[*laces - 1] = size - total;
2213 break;
2214 }
2215 }
2216
2217 *buf = data;
2218 *lace_buf = lace_size;
2219 *buf_size = size;
2220
2221 return res;
2222 }
2223
2224 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2225 MatroskaTrack *track, AVStream *st,
2226 uint8_t *data, int size, uint64_t timecode,
2227 uint64_t duration, int64_t pos)
2228 {
2229 int a = st->codecpar->block_align;
2230 int sps = track->audio.sub_packet_size;
2231 int cfs = track->audio.coded_framesize;
2232 int h = track->audio.sub_packet_h;
2233 int y = track->audio.sub_packet_cnt;
2234 int w = track->audio.frame_size;
2235 int x;
2236
2237 if (!track->audio.pkt_cnt) {
2238 if (track->audio.sub_packet_cnt == 0)
2239 track->audio.buf_timecode = timecode;
2240 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2241 if (size < cfs * h / 2) {
2242 av_log(matroska->ctx, AV_LOG_ERROR,
2243 "Corrupt int4 RM-style audio packet size\n");
2244 return AVERROR_INVALIDDATA;
2245 }
2246 for (x = 0; x < h / 2; x++)
2247 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2248 data + x * cfs, cfs);
2249 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2250 if (size < w) {
2251 av_log(matroska->ctx, AV_LOG_ERROR,
2252 "Corrupt sipr RM-style audio packet size\n");
2253 return AVERROR_INVALIDDATA;
2254 }
2255 memcpy(track->audio.buf + y * w, data, w);
2256 } else {
2257 if (size < sps * w / sps) {
2258 av_log(matroska->ctx, AV_LOG_ERROR,
2259 "Corrupt generic RM-style audio packet size\n");
2260 return AVERROR_INVALIDDATA;
2261 }
2262 for (x = 0; x < w / sps; x++)
2263 memcpy(track->audio.buf +
2264 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2265 data + x * sps, sps);
2266 }
2267
2268 if (++track->audio.sub_packet_cnt >= h) {
2269 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2270 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2271 track->audio.sub_packet_cnt = 0;
2272 track->audio.pkt_cnt = h * w / a;
2273 }
2274 }
2275
2276 while (track->audio.pkt_cnt) {
2277 int ret;
2278 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2279 if (!pkt)
2280 return AVERROR(ENOMEM);
2281
2282 ret = av_new_packet(pkt, a);
2283 if (ret < 0) {
2284 av_free(pkt);
2285 return ret;
2286 }
2287 memcpy(pkt->data,
2288 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2289 a);
2290 pkt->pts = track->audio.buf_timecode;
2291 track->audio.buf_timecode = AV_NOPTS_VALUE;
2292 pkt->pos = pos;
2293 pkt->stream_index = st->index;
2294 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2295 }
2296
2297 return 0;
2298 }
2299
2300 /* reconstruct full wavpack blocks from mangled matroska ones */
2301 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2302 uint8_t **pdst, int *size)
2303 {
2304 uint8_t *dst = NULL;
2305 int dstlen = 0;
2306 int srclen = *size;
2307 uint32_t samples;
2308 uint16_t ver;
2309 int ret, offset = 0;
2310
2311 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2312 return AVERROR_INVALIDDATA;
2313
2314 ver = AV_RL16(track->stream->codecpar->extradata);
2315
2316 samples = AV_RL32(src);
2317 src += 4;
2318 srclen -= 4;
2319
2320 while (srclen >= 8) {
2321 int multiblock;
2322 uint32_t blocksize;
2323 uint8_t *tmp;
2324
2325 uint32_t flags = AV_RL32(src);
2326 uint32_t crc = AV_RL32(src + 4);
2327 src += 8;
2328 srclen -= 8;
2329
2330 multiblock = (flags & 0x1800) != 0x1800;
2331 if (multiblock) {
2332 if (srclen < 4) {
2333 ret = AVERROR_INVALIDDATA;
2334 goto fail;
2335 }
2336 blocksize = AV_RL32(src);
2337 src += 4;
2338 srclen -= 4;
2339 } else
2340 blocksize = srclen;
2341
2342 if (blocksize > srclen) {
2343 ret = AVERROR_INVALIDDATA;
2344 goto fail;
2345 }
2346
2347 tmp = av_realloc(dst, dstlen + blocksize + 32);
2348 if (!tmp) {
2349 ret = AVERROR(ENOMEM);
2350 goto fail;
2351 }
2352 dst = tmp;
2353 dstlen += blocksize + 32;
2354
2355 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2356 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2357 AV_WL16(dst + offset + 8, ver); // version
2358 AV_WL16(dst + offset + 10, 0); // track/index_no
2359 AV_WL32(dst + offset + 12, 0); // total samples
2360 AV_WL32(dst + offset + 16, 0); // block index
2361 AV_WL32(dst + offset + 20, samples); // number of samples
2362 AV_WL32(dst + offset + 24, flags); // flags
2363 AV_WL32(dst + offset + 28, crc); // crc
2364 memcpy(dst + offset + 32, src, blocksize); // block data
2365
2366 src += blocksize;
2367 srclen -= blocksize;
2368 offset += blocksize + 32;
2369 }
2370
2371 *pdst = dst;
2372 *size = dstlen;
2373
2374 return 0;
2375
2376 fail:
2377 av_freep(&dst);
2378 return ret;
2379 }
2380
2381 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2382 MatroskaTrack *track, AVStream *st,
2383 uint8_t *data, int pkt_size,
2384 uint64_t timecode, uint64_t duration,
2385 int64_t pos, int is_keyframe)
2386 {
2387 MatroskaTrackEncoding *encodings = track->encodings.elem;
2388 uint8_t *pkt_data = data;
2389 int offset = 0, res;
2390 AVPacket *pkt;
2391
2392 if (encodings && encodings->scope & 1) {
2393 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2394 if (res < 0)
2395 return res;
2396 }
2397
2398 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
2399 uint8_t *wv_data;
2400 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2401 if (res < 0) {
2402 av_log(matroska->ctx, AV_LOG_ERROR,
2403 "Error parsing a wavpack block.\n");
2404 goto fail;
2405 }
2406 if (pkt_data != data)
2407 av_freep(&pkt_data);
2408 pkt_data = wv_data;
2409 }
2410
2411 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES)
2412 offset = 8;
2413
2414 pkt = av_mallocz(sizeof(AVPacket));
2415 if (!pkt) {
2416 av_freep(&pkt_data);
2417 return AVERROR(ENOMEM);
2418 }
2419 /* XXX: prevent data copy... */
2420 if (av_new_packet(pkt, pkt_size + offset) < 0) {
2421 av_free(pkt);
2422 av_freep(&pkt_data);
2423 return AVERROR(ENOMEM);
2424 }
2425
2426 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
2427 uint8_t *buf = pkt->data;
2428 bytestream_put_be32(&buf, pkt_size);
2429 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
2430 }
2431
2432 memcpy(pkt->data + offset, pkt_data, pkt_size);
2433
2434 if (pkt_data != data)
2435 av_free(pkt_data);
2436
2437 pkt->flags = is_keyframe;
2438 pkt->stream_index = st->index;
2439
2440 if (track->ms_compat)
2441 pkt->dts = timecode;
2442 else
2443 pkt->pts = timecode;
2444 pkt->pos = pos;
2445 if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE || st->codecpar->codec_id == AV_CODEC_ID_SRT)
2446 pkt->duration = duration;
2447 #if FF_API_CONVERGENCE_DURATION
2448 FF_DISABLE_DEPRECATION_WARNINGS
2449 if (st->codecpar->codec_id == AV_CODEC_ID_SRT)
2450 pkt->convergence_duration = duration;
2451 FF_ENABLE_DEPRECATION_WARNINGS
2452 #endif
2453
2454 if (st->codecpar->codec_id == AV_CODEC_ID_SSA)
2455 matroska_fix_ass_packet(matroska, pkt, duration);
2456
2457 if (matroska->prev_pkt &&
2458 timecode != AV_NOPTS_VALUE &&
2459 matroska->prev_pkt->pts == timecode &&
2460 matroska->prev_pkt->stream_index == st->index &&
2461 st->codecpar->codec_id == AV_CODEC_ID_SSA)
2462 matroska_merge_packets(matroska->prev_pkt, pkt);
2463 else {
2464 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2465 matroska->prev_pkt = pkt;
2466 }
2467
2468 return 0;
2469
2470 fail:
2471 if (pkt_data != data)
2472 av_freep(&pkt_data);
2473 return res;
2474 }
2475
2476 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
2477 int size, int64_t pos, uint64_t cluster_time,
2478 uint64_t block_duration, int is_keyframe,
2479 int64_t cluster_pos)
2480 {
2481 uint64_t timecode = AV_NOPTS_VALUE;
2482 MatroskaTrack *track;
2483 int res = 0;
2484 AVStream *st;
2485 int16_t block_time;
2486 uint32_t *lace_size = NULL;
2487 int n, flags, laces = 0;
2488 uint64_t num, duration;
2489
2490 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
2491 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2492 return n;
2493 }
2494 data += n;
2495 size -= n;
2496
2497 track = matroska_find_track_by_num(matroska, num);
2498 if (!track || !track->stream) {
2499 av_log(matroska->ctx, AV_LOG_INFO,
2500 "Invalid stream %"PRIu64" or size %u\n", num, size);
2501 return AVERROR_INVALIDDATA;
2502 } else if (size <= 3)
2503 return 0;
2504 st = track->stream;
2505 if (st->discard >= AVDISCARD_ALL)
2506 return res;
2507
2508 block_time = AV_RB16(data);
2509 data += 2;
2510 flags = *data++;
2511 size -= 3;
2512 if (is_keyframe == -1)
2513 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
2514
2515 if (cluster_time != (uint64_t) -1 &&
2516 (block_time >= 0 || cluster_time >= -block_time)) {
2517 timecode = cluster_time + block_time - track->codec_delay;
2518 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2519 timecode < track->end_timecode)
2520 is_keyframe = 0; /* overlapping subtitles are not key frame */
2521 if (is_keyframe)
2522 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
2523 AVINDEX_KEYFRAME);
2524 }
2525
2526 if (matroska->skip_to_keyframe &&
2527 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
2528 if (!is_keyframe || timecode < matroska->skip_to_timecode)
2529 return res;
2530 matroska->skip_to_keyframe = 0;
2531 }
2532
2533 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
2534 &lace_size, &laces);
2535
2536 if (res)
2537 goto end;
2538
2539 if (block_duration != AV_NOPTS_VALUE) {
2540 duration = block_duration / laces;
2541 if (block_duration != duration * laces) {
2542 av_log(matroska->ctx, AV_LOG_WARNING,
2543 "Incorrect block_duration, possibly corrupted container");
2544 }
2545 } else {
2546 duration = track->default_duration / matroska->time_scale;
2547 block_duration = duration * laces;
2548 }
2549
2550 if (timecode != AV_NOPTS_VALUE)
2551 track->end_timecode =
2552 FFMAX(track->end_timecode, timecode + block_duration);
2553
2554 for (n = 0; n < laces; n++) {
2555 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2556 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
2557 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2558 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
2559 st->codecpar->block_align && track->audio.sub_packet_size) {
2560 res = matroska_parse_rm_audio(matroska, track, st, data,
2561 lace_size[n],
2562 timecode, duration, pos);
2563 if (res)
2564 goto end;
2565 } else {
2566 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
2567 timecode, duration, pos,
2568 !n ? is_keyframe : 0);
2569 if (res)
2570 goto end;
2571 }
2572
2573 if (timecode != AV_NOPTS_VALUE)
2574 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2575 data += lace_size[n];
2576 }
2577
2578 end:
2579 av_free(lace_size);
2580 return res;
2581 }
2582
2583 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
2584 {
2585 EbmlList *blocks_list;
2586 MatroskaBlock *blocks;
2587 int i, res;
2588 res = ebml_parse(matroska,
2589 matroska_cluster_incremental_parsing,
2590 &matroska->current_cluster);
2591 if (res == 1) {
2592 /* New Cluster */
2593 if (matroska->current_cluster_pos)
2594 ebml_level_end(matroska);
2595 ebml_free(matroska_cluster, &matroska->current_cluster);
2596 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
2597 matroska->current_cluster_num_blocks = 0;
2598 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
2599 matroska->prev_pkt = NULL;
2600 /* sizeof the ID which was already read */
2601 if (matroska->current_id)
2602 matroska->current_cluster_pos -= 4;
2603 res = ebml_parse(matroska,
2604 matroska_clusters_incremental,
2605 &matroska->current_cluster);
2606 /* Try parsing the block again. */
2607 if (res == 1)
2608 res = ebml_parse(matroska,
2609 matroska_cluster_incremental_parsing,
2610 &matroska->current_cluster);
2611 }
2612
2613 if (!res &&
2614 matroska->current_cluster_num_blocks <
2615 matroska->current_cluster.blocks.nb_elem) {
2616 blocks_list = &matroska->current_cluster.blocks;
2617 blocks = blocks_list->elem;
2618
2619 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
2620 i = blocks_list->nb_elem - 1;
2621 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2622 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2623 if (!blocks[i].non_simple)
2624 blocks[i].duration = AV_NOPTS_VALUE;
2625 res = matroska_parse_block(matroska, blocks[i].bin.data,
2626 blocks[i].bin.size, blocks[i].bin.pos,
2627 matroska->current_cluster.timecode,
2628 blocks[i].duration, is_keyframe,
2629 matroska->current_cluster_pos);
2630 }
2631 }
2632
2633 if (res < 0)
2634 matroska->done = 1;
2635 return res;
2636 }
2637
2638 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
2639 {
2640 MatroskaCluster cluster = { 0 };
2641 EbmlList *blocks_list;
2642 MatroskaBlock *blocks;
2643 int i, res;
2644 int64_t pos;
2645
2646 if (!matroska->contains_ssa)
2647 return matroska_parse_cluster_incremental(matroska);
2648 pos = avio_tell(matroska->ctx->pb);
2649 matroska->prev_pkt = NULL;
2650 if (matroska->current_id)
2651 pos -= 4; /* sizeof the ID which was already read */
2652 res = ebml_parse(matroska, matroska_clusters, &cluster);
2653 blocks_list = &cluster.blocks;
2654 blocks = blocks_list->elem;
2655 for (i = 0; i < blocks_list->nb_elem && !res; i++)
2656 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
2657 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
2658 if (!blocks[i].non_simple)
2659 blocks[i].duration = AV_NOPTS_VALUE;
2660 res = matroska_parse_block(matroska, blocks[i].bin.data,
2661 blocks[i].bin.size, blocks[i].bin.pos,
2662 cluster.timecode, blocks[i].duration,
2663 is_keyframe, pos);
2664 }
2665 ebml_free(matroska_cluster, &cluster);
2666 return res;
2667 }
2668
2669 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
2670 {
2671 MatroskaDemuxContext *matroska = s->priv_data;
2672 int ret = 0;
2673
2674 while (!ret && matroska_deliver_packet(matroska, pkt)) {
2675 int64_t pos = avio_tell(matroska->ctx->pb);
2676 if (matroska->done)
2677 return AVERROR_EOF;
2678 if (matroska_parse_cluster(matroska) < 0)
2679 ret = matroska_resync(matroska, pos);
2680 }
2681
2682 if (ret == AVERROR_INVALIDDATA && pkt->data) {
2683 pkt->flags |= AV_PKT_FLAG_CORRUPT;
2684 return 0;
2685 }
2686
2687 return ret;
2688 }
2689
2690 static int matroska_read_seek(AVFormatContext *s, int stream_index,
2691 int64_t timestamp, int flags)
2692 {
2693 MatroskaDemuxContext *matroska = s->priv_data;
2694 MatroskaTrack *tracks = NULL;
2695 AVStream *st = s->streams[stream_index];
2696 int i, index, index_sub, index_min;
2697
2698 /* Parse the CUES now since we need the index data to seek. */
2699 if (matroska->cues_parsing_deferred) {
2700 matroska_parse_cues(matroska);
2701 matroska->cues_parsing_deferred = 0;
2702 }
2703
2704 if (!st->nb_index_entries)
2705 return 0;
2706 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
2707
2708 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2709 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
2710 SEEK_SET);
2711 matroska->current_id = 0;
2712 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
2713 matroska_clear_queue(matroska);
2714 if (matroska_parse_cluster(matroska) < 0)
2715 break;
2716 }
2717 }
2718
2719 matroska_clear_queue(matroska);
2720 if (index < 0)
2721 return 0;
2722
2723 index_min = index;
2724 tracks = matroska->tracks.elem;
2725 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2726 tracks[i].audio.pkt_cnt = 0;
2727 tracks[i].audio.sub_packet_cnt = 0;
2728 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
2729 tracks[i].end_timecode = 0;
2730 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
2731 tracks[i].stream->discard != AVDISCARD_ALL) {
2732 index_sub = av_index_search_timestamp(
2733 tracks[i].stream, st->index_entries[index].timestamp,
2734 AVSEEK_FLAG_BACKWARD);
2735 if (index_sub >= 0 &&
2736 st->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
2737 st->index_entries[index].timestamp -
2738 st->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
2739 index_min = index_sub;
2740 }
2741 }
2742
2743 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
2744 matroska->current_id = 0;
2745 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2746 matroska->skip_to_timecode = st->index_entries[index].timestamp;
2747 matroska->done = 0;
2748 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
2749 return 0;
2750 }
2751
2752 static int matroska_read_close(AVFormatContext *s)
2753 {
2754 MatroskaDemuxContext *matroska = s->priv_data;
2755 MatroskaTrack *tracks = matroska->tracks.elem;
2756 int n;
2757
2758 matroska_clear_queue(matroska);
2759
2760 for (n = 0; n < matroska->tracks.nb_elem; n++)
2761 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
2762 av_free(tracks[n].audio.buf);
2763 ebml_free(matroska_cluster, &matroska->current_cluster);
2764 ebml_free(matroska_segment, matroska);
2765
2766 return 0;
2767 }
2768
2769 AVInputFormat ff_matroska_demuxer = {
2770 .name = "matroska,webm",
2771 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
2772 .extensions = "mkv,mk3d,mka,mks",
2773 .priv_data_size = sizeof(MatroskaDemuxContext),
2774 .read_probe = matroska_probe,
2775 .read_header = matroska_read_header,
2776 .read_packet = matroska_read_packet,
2777 .read_close = matroska_read_close,
2778 .read_seek = matroska_read_seek,
2779 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
2780 };