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matroskadec.c
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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
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 
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
46 
47 #include "libavcodec/bytestream.h"
48 #include "libavcodec/flac.h"
49 #include "libavcodec/mpeg4audio.h"
50 
51 #include "avformat.h"
52 #include "avio_internal.h"
53 #include "internal.h"
54 #include "isom.h"
55 #include "matroska.h"
56 #include "oggdec.h"
57 /* For ff_codec_get_id(). */
58 #include "riff.h"
59 #include "rmsipr.h"
60 
61 #if CONFIG_BZLIB
62 #include <bzlib.h>
63 #endif
64 #if CONFIG_ZLIB
65 #include <zlib.h>
66 #endif
67 
68 #include "qtpalette.h"
69 
70 typedef enum {
83 } EbmlType;
84 
85 typedef const struct EbmlSyntax {
86  uint32_t id;
90  union {
91  uint64_t u;
92  double f;
93  const char *s;
94  const struct EbmlSyntax *n;
95  } def;
96 } EbmlSyntax;
97 
98 typedef struct EbmlList {
99  int nb_elem;
100  void *elem;
101 } EbmlList;
102 
103 typedef struct EbmlBin {
104  int size;
106  int64_t pos;
107 } EbmlBin;
108 
109 typedef struct Ebml {
110  uint64_t version;
111  uint64_t max_size;
112  uint64_t id_length;
113  char *doctype;
114  uint64_t doctype_version;
115 } Ebml;
116 
117 typedef struct MatroskaTrackCompression {
118  uint64_t algo;
121 
122 typedef struct MatroskaTrackEncryption {
123  uint64_t algo;
126 
127 typedef struct MatroskaTrackEncoding {
128  uint64_t scope;
129  uint64_t type;
133 
134 typedef struct MatroskaMasteringMeta {
135  double r_x;
136  double r_y;
137  double g_x;
138  double g_y;
139  double b_x;
140  double b_y;
141  double white_x;
142  double white_y;
146 
147 typedef struct MatroskaTrackVideoColor {
150  uint64_t chroma_sub_horz;
151  uint64_t chroma_sub_vert;
152  uint64_t cb_sub_horz;
153  uint64_t cb_sub_vert;
156  uint64_t range;
158  uint64_t primaries;
159  uint64_t max_cll;
160  uint64_t max_fall;
163 
164 typedef struct MatroskaTrackVideo {
165  double frame_rate;
166  uint64_t display_width;
167  uint64_t display_height;
168  uint64_t pixel_width;
169  uint64_t pixel_height;
171  uint64_t stereo_mode;
172  uint64_t alpha_mode;
175 
176 typedef struct MatroskaTrackAudio {
177  double samplerate;
179  uint64_t bitdepth;
180  uint64_t channels;
181 
182  /* real audio header (extracted from extradata) */
188  int pkt_cnt;
189  uint64_t buf_timecode;
192 
193 typedef struct MatroskaTrackPlane {
194  uint64_t uid;
195  uint64_t type;
197 
198 typedef struct MatroskaTrackOperation {
201 
202 typedef struct MatroskaTrack {
203  uint64_t num;
204  uint64_t uid;
205  uint64_t type;
206  char *name;
207  char *codec_id;
209  char *language;
210  double time_scale;
212  uint64_t flag_default;
213  uint64_t flag_forced;
214  uint64_t seek_preroll;
219  uint64_t codec_delay;
220 
222  int64_t end_timecode;
225 
228 } MatroskaTrack;
229 
230 typedef struct MatroskaAttachment {
231  uint64_t uid;
232  char *filename;
233  char *mime;
235 
238 
239 typedef struct MatroskaChapter {
240  uint64_t start;
241  uint64_t end;
242  uint64_t uid;
243  char *title;
244 
247 
248 typedef struct MatroskaIndexPos {
249  uint64_t track;
250  uint64_t pos;
252 
253 typedef struct MatroskaIndex {
254  uint64_t time;
256 } MatroskaIndex;
257 
258 typedef struct MatroskaTag {
259  char *name;
260  char *string;
261  char *lang;
262  uint64_t def;
264 } MatroskaTag;
265 
266 typedef struct MatroskaTagTarget {
267  char *type;
268  uint64_t typevalue;
269  uint64_t trackuid;
270  uint64_t chapteruid;
271  uint64_t attachuid;
273 
274 typedef struct MatroskaTags {
277 } MatroskaTags;
278 
279 typedef struct MatroskaSeekhead {
280  uint64_t id;
281  uint64_t pos;
283 
284 typedef struct MatroskaLevel {
285  uint64_t start;
286  uint64_t length;
287 } MatroskaLevel;
288 
289 typedef struct MatroskaCluster {
290  uint64_t timecode;
293 
294 typedef struct MatroskaLevel1Element {
295  uint64_t id;
296  uint64_t pos;
297  int parsed;
299 
300 typedef struct MatroskaDemuxContext {
301  const AVClass *class;
303 
304  /* EBML stuff */
307  int level_up;
308  uint32_t current_id;
309 
310  uint64_t time_scale;
311  double duration;
312  char *title;
313  char *muxingapp;
321 
322  /* byte position of the segment inside the stream */
323  int64_t segment_start;
324 
325  /* the packet queue */
329 
330  int done;
331 
332  /* What to skip before effectively reading a packet. */
335 
336  /* File has a CUES element, but we defer parsing until it is needed. */
338 
339  /* Level1 elements and whether they were read yet */
342 
346 
347  /* File has SSA subtitles which prevent incremental cluster parsing. */
349 
350  /* WebM DASH Manifest live flag/ */
351  int is_live;
353 
354 typedef struct MatroskaBlock {
355  uint64_t duration;
356  int64_t reference;
357  uint64_t non_simple;
359  uint64_t additional_id;
362 } MatroskaBlock;
363 
364 static const EbmlSyntax ebml_header[] = {
365  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
366  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
367  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
368  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
369  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
372  { 0 }
373 };
374 
375 static const EbmlSyntax ebml_syntax[] = {
376  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
377  { 0 }
378 };
379 
380 static const EbmlSyntax matroska_info[] = {
381  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
383  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
385  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
386  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
388  { 0 }
389 };
390 
392  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
393  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
394  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
395  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
396  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
397  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
398  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
399  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
400  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
401  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
402  { 0 }
403 };
404 
406  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u=2 } },
407  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=8 } },
408  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
409  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
410  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
411  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
412  { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u=0 } },
413  { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u=0 } },
414  { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u=0 } },
416  { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u=2 } },
417  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
418  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
419  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
420  { 0 }
421 };
422 
424  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
425  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
426  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
427  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
428  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
429  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
430  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
431  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
440  { 0 }
441 };
442 
444  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
445  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
446  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
447  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
448  { 0 }
449 };
450 
454  { 0 }
455 };
456 
465  { 0 }
466 };
468  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
469  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
470  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
471  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
473  { 0 }
474 };
475 
477  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
478  { 0 }
479 };
480 
484  { 0 }
485 };
486 
488  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
489  { 0 }
490 };
491 
493  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
494  { 0 }
495 };
496 
497 static const EbmlSyntax matroska_track[] = {
498  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
500  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
503  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
504  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
505  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
506  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
507  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
508  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
509  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
510  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
511  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
512  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
513  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
514  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
515  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
524  { 0 }
525 };
526 
527 static const EbmlSyntax matroska_tracks[] = {
528  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
529  { 0 }
530 };
531 
532 static const EbmlSyntax matroska_attachment[] = {
534  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
535  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
536  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
538  { 0 }
539 };
540 
542  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
543  { 0 }
544 };
545 
547  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
550  { 0 }
551 };
552 
557  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
562  { 0 }
563 };
564 
565 static const EbmlSyntax matroska_chapter[] = {
566  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
571  { 0 }
572 };
573 
574 static const EbmlSyntax matroska_chapters[] = {
575  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
576  { 0 }
577 };
578 
579 static const EbmlSyntax matroska_index_pos[] = {
580  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
585  { 0 }
586 };
587 
589  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
590  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
591  { 0 }
592 };
593 
594 static const EbmlSyntax matroska_index[] = {
595  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
596  { 0 }
597 };
598 
599 static const EbmlSyntax matroska_simpletag[] = {
600  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
601  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
602  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
603  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
604  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
605  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
606  { 0 }
607 };
608 
609 static const EbmlSyntax matroska_tagtargets[] = {
611  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
612  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
613  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
614  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
615  { 0 }
616 };
617 
618 static const EbmlSyntax matroska_tag[] = {
619  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
620  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
621  { 0 }
622 };
623 
624 static const EbmlSyntax matroska_tags[] = {
625  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
626  { 0 }
627 };
628 
630  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
631  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
632  { 0 }
633 };
634 
635 static const EbmlSyntax matroska_seekhead[] = {
636  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
637  { 0 }
638 };
639 
640 static const EbmlSyntax matroska_segment[] = {
641  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
642  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
643  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
644  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
645  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
646  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
647  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
649  { 0 }
650 };
651 
652 static const EbmlSyntax matroska_segments[] = {
653  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
654  { 0 }
655 };
656 
657 static const EbmlSyntax matroska_blockmore[] = {
658  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
659  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
660  { 0 }
661 };
662 
664  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
665  { 0 }
666 };
667 
668 static const EbmlSyntax matroska_blockgroup[] = {
669  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
670  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
671  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
673  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
674  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
676  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
677  { 0 }
678 };
679 
680 static const EbmlSyntax matroska_cluster[] = {
681  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
682  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
683  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
686  { 0 }
687 };
688 
689 static const EbmlSyntax matroska_clusters[] = {
690  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
695  { 0 }
696 };
697 
699  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
700  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
701  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
709  { 0 }
710 };
711 
713  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
718  { 0 }
719 };
720 
722  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
727  { 0 }
728 };
729 
730 static const char *const matroska_doctypes[] = { "matroska", "webm" };
731 
732 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
733 {
734  AVIOContext *pb = matroska->ctx->pb;
735  uint32_t id;
736  matroska->current_id = 0;
737  matroska->num_levels = 0;
738 
739  /* seek to next position to resync from */
740  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
741  goto eof;
742 
743  id = avio_rb32(pb);
744 
745  // try to find a toplevel element
746  while (!avio_feof(pb)) {
747  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
748  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
750  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
751  matroska->current_id = id;
752  return 0;
753  }
754  id = (id << 8) | avio_r8(pb);
755  }
756 
757 eof:
758  matroska->done = 1;
759  return AVERROR_EOF;
760 }
761 
762 /*
763  * Return: Whether we reached the end of a level in the hierarchy or not.
764  */
766 {
767  AVIOContext *pb = matroska->ctx->pb;
768  int64_t pos = avio_tell(pb);
769 
770  if (matroska->num_levels > 0) {
771  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
772  if (pos - level->start >= level->length || matroska->current_id) {
773  matroska->num_levels--;
774  return 1;
775  }
776  }
777  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
778 }
779 
780 /*
781  * Read: an "EBML number", which is defined as a variable-length
782  * array of bytes. The first byte indicates the length by giving a
783  * number of 0-bits followed by a one. The position of the first
784  * "one" bit inside the first byte indicates the length of this
785  * number.
786  * Returns: number of bytes read, < 0 on error
787  */
789  int max_size, uint64_t *number)
790 {
791  int read = 1, n = 1;
792  uint64_t total = 0;
793 
794  /* The first byte tells us the length in bytes - avio_r8() can normally
795  * return 0, but since that's not a valid first ebmlID byte, we can
796  * use it safely here to catch EOS. */
797  if (!(total = avio_r8(pb))) {
798  /* we might encounter EOS here */
799  if (!avio_feof(pb)) {
800  int64_t pos = avio_tell(pb);
801  av_log(matroska->ctx, AV_LOG_ERROR,
802  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
803  pos, pos);
804  return pb->error ? pb->error : AVERROR(EIO);
805  }
806  return AVERROR_EOF;
807  }
808 
809  /* get the length of the EBML number */
810  read = 8 - ff_log2_tab[total];
811  if (read > max_size) {
812  int64_t pos = avio_tell(pb) - 1;
813  av_log(matroska->ctx, AV_LOG_ERROR,
814  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
815  (uint8_t) total, pos, pos);
816  return AVERROR_INVALIDDATA;
817  }
818 
819  /* read out length */
820  total ^= 1 << ff_log2_tab[total];
821  while (n++ < read)
822  total = (total << 8) | avio_r8(pb);
823 
824  *number = total;
825 
826  return read;
827 }
828 
829 /**
830  * Read a EBML length value.
831  * This needs special handling for the "unknown length" case which has multiple
832  * encodings.
833  */
835  uint64_t *number)
836 {
837  int res = ebml_read_num(matroska, pb, 8, number);
838  if (res > 0 && *number + 1 == 1ULL << (7 * res))
839  *number = 0xffffffffffffffULL;
840  return res;
841 }
842 
843 /*
844  * Read the next element as an unsigned int.
845  * 0 is success, < 0 is failure.
846  */
847 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
848 {
849  int n = 0;
850 
851  if (size > 8)
852  return AVERROR_INVALIDDATA;
853 
854  /* big-endian ordering; build up number */
855  *num = 0;
856  while (n++ < size)
857  *num = (*num << 8) | avio_r8(pb);
858 
859  return 0;
860 }
861 
862 /*
863  * Read the next element as a signed int.
864  * 0 is success, < 0 is failure.
865  */
866 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
867 {
868  int n = 1;
869 
870  if (size > 8)
871  return AVERROR_INVALIDDATA;
872 
873  if (size == 0) {
874  *num = 0;
875  } else {
876  *num = sign_extend(avio_r8(pb), 8);
877 
878  /* big-endian ordering; build up number */
879  while (n++ < size)
880  *num = ((uint64_t)*num << 8) | avio_r8(pb);
881  }
882 
883  return 0;
884 }
885 
886 /*
887  * Read the next element as a float.
888  * 0 is success, < 0 is failure.
889  */
890 static int ebml_read_float(AVIOContext *pb, int size, double *num)
891 {
892  if (size == 0)
893  *num = 0;
894  else if (size == 4)
895  *num = av_int2float(avio_rb32(pb));
896  else if (size == 8)
897  *num = av_int2double(avio_rb64(pb));
898  else
899  return AVERROR_INVALIDDATA;
900 
901  return 0;
902 }
903 
904 /*
905  * Read the next element as an ASCII string.
906  * 0 is success, < 0 is failure.
907  */
908 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
909 {
910  char *res;
911 
912  /* EBML strings are usually not 0-terminated, so we allocate one
913  * byte more, read the string and NULL-terminate it ourselves. */
914  if (!(res = av_malloc(size + 1)))
915  return AVERROR(ENOMEM);
916  if (avio_read(pb, (uint8_t *) res, size) != size) {
917  av_free(res);
918  return AVERROR(EIO);
919  }
920  (res)[size] = '\0';
921  av_free(*str);
922  *str = res;
923 
924  return 0;
925 }
926 
927 /*
928  * Read the next element as binary data.
929  * 0 is success, < 0 is failure.
930  */
931 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
932 {
933  av_fast_padded_malloc(&bin->data, &bin->size, length);
934  if (!bin->data)
935  return AVERROR(ENOMEM);
936 
937  bin->size = length;
938  bin->pos = avio_tell(pb);
939  if (avio_read(pb, bin->data, length) != length) {
940  av_freep(&bin->data);
941  bin->size = 0;
942  return AVERROR(EIO);
943  }
944 
945  return 0;
946 }
947 
948 /*
949  * Read the next element, but only the header. The contents
950  * are supposed to be sub-elements which can be read separately.
951  * 0 is success, < 0 is failure.
952  */
953 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
954 {
955  AVIOContext *pb = matroska->ctx->pb;
957 
958  if (matroska->num_levels >= EBML_MAX_DEPTH) {
959  av_log(matroska->ctx, AV_LOG_ERROR,
960  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
961  return AVERROR(ENOSYS);
962  }
963 
964  level = &matroska->levels[matroska->num_levels++];
965  level->start = avio_tell(pb);
966  level->length = length;
967 
968  return 0;
969 }
970 
971 /*
972  * Read signed/unsigned "EBML" numbers.
973  * Return: number of bytes processed, < 0 on error
974  */
976  uint8_t *data, uint32_t size, uint64_t *num)
977 {
978  AVIOContext pb;
979  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
980  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
981 }
982 
983 /*
984  * Same as above, but signed.
985  */
987  uint8_t *data, uint32_t size, int64_t *num)
988 {
989  uint64_t unum;
990  int res;
991 
992  /* read as unsigned number first */
993  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
994  return res;
995 
996  /* make signed (weird way) */
997  *num = unum - ((1LL << (7 * res - 1)) - 1);
998 
999  return res;
1000 }
1001 
1002 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1003  EbmlSyntax *syntax, void *data);
1004 
1005 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1006  uint32_t id, void *data)
1007 {
1008  int i;
1009  for (i = 0; syntax[i].id; i++)
1010  if (id == syntax[i].id)
1011  break;
1012  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1013  matroska->num_levels > 0 &&
1014  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1015  return 0; // we reached the end of an unknown size cluster
1016  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1017  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1018  }
1019  return ebml_parse_elem(matroska, &syntax[i], data);
1020 }
1021 
1022 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1023  void *data)
1024 {
1025  if (!matroska->current_id) {
1026  uint64_t id;
1027  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1028  if (res < 0) {
1029  // in live mode, finish parsing if EOF is reached.
1030  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1031  res == AVERROR_EOF) ? 1 : res;
1032  }
1033  matroska->current_id = id | 1 << 7 * res;
1034  }
1035  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1036 }
1037 
1038 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1039  void *data)
1040 {
1041  int i, res = 0;
1042 
1043  for (i = 0; syntax[i].id; i++)
1044  switch (syntax[i].type) {
1045  case EBML_UINT:
1046  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1047  break;
1048  case EBML_FLOAT:
1049  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1050  break;
1051  case EBML_STR:
1052  case EBML_UTF8:
1053  // the default may be NULL
1054  if (syntax[i].def.s) {
1055  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1056  *dst = av_strdup(syntax[i].def.s);
1057  if (!*dst)
1058  return AVERROR(ENOMEM);
1059  }
1060  break;
1061  }
1062 
1063  while (!res && !ebml_level_end(matroska))
1064  res = ebml_parse(matroska, syntax, data);
1065 
1066  return res;
1067 }
1068 
1069 static int is_ebml_id_valid(uint32_t id)
1070 {
1071  // Due to endian nonsense in Matroska, the highest byte with any bits set
1072  // will contain the leading length bit. This bit in turn identifies the
1073  // total byte length of the element by its position within the byte.
1074  unsigned int bits = av_log2(id);
1075  return id && (bits + 7) / 8 == (8 - bits % 8);
1076 }
1077 
1078 /*
1079  * Allocate and return the entry for the level1 element with the given ID. If
1080  * an entry already exists, return the existing entry.
1081  */
1083  uint32_t id)
1084 {
1085  int i;
1086  MatroskaLevel1Element *elem;
1087 
1088  if (!is_ebml_id_valid(id))
1089  return NULL;
1090 
1091  // Some files link to all clusters; useless.
1092  if (id == MATROSKA_ID_CLUSTER)
1093  return NULL;
1094 
1095  // There can be multiple seekheads.
1096  if (id != MATROSKA_ID_SEEKHEAD) {
1097  for (i = 0; i < matroska->num_level1_elems; i++) {
1098  if (matroska->level1_elems[i].id == id)
1099  return &matroska->level1_elems[i];
1100  }
1101  }
1102 
1103  // Only a completely broken file would have more elements.
1104  // It also provides a low-effort way to escape from circular seekheads
1105  // (every iteration will add a level1 entry).
1106  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1107  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1108  return NULL;
1109  }
1110 
1111  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1112  *elem = (MatroskaLevel1Element){.id = id};
1113 
1114  return elem;
1115 }
1116 
1118  EbmlSyntax *syntax, void *data)
1119 {
1120  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1121  [EBML_UINT] = 8,
1122  [EBML_FLOAT] = 8,
1123  // max. 16 MB for strings
1124  [EBML_STR] = 0x1000000,
1125  [EBML_UTF8] = 0x1000000,
1126  // max. 256 MB for binary data
1127  [EBML_BIN] = 0x10000000,
1128  // no limits for anything else
1129  };
1130  AVIOContext *pb = matroska->ctx->pb;
1131  uint32_t id = syntax->id;
1132  uint64_t length;
1133  int res;
1134  void *newelem;
1135  MatroskaLevel1Element *level1_elem;
1136 
1137  data = (char *) data + syntax->data_offset;
1138  if (syntax->list_elem_size) {
1139  EbmlList *list = data;
1140  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1141  if (!newelem)
1142  return AVERROR(ENOMEM);
1143  list->elem = newelem;
1144  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1145  memset(data, 0, syntax->list_elem_size);
1146  list->nb_elem++;
1147  }
1148 
1149  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1150  matroska->current_id = 0;
1151  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1152  return res;
1153  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1154  av_log(matroska->ctx, AV_LOG_ERROR,
1155  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1156  length, max_lengths[syntax->type], syntax->type);
1157  return AVERROR_INVALIDDATA;
1158  }
1159  }
1160 
1161  switch (syntax->type) {
1162  case EBML_UINT:
1163  res = ebml_read_uint(pb, length, data);
1164  break;
1165  case EBML_SINT:
1166  res = ebml_read_sint(pb, length, data);
1167  break;
1168  case EBML_FLOAT:
1169  res = ebml_read_float(pb, length, data);
1170  break;
1171  case EBML_STR:
1172  case EBML_UTF8:
1173  res = ebml_read_ascii(pb, length, data);
1174  break;
1175  case EBML_BIN:
1176  res = ebml_read_binary(pb, length, data);
1177  break;
1178  case EBML_LEVEL1:
1179  case EBML_NEST:
1180  if ((res = ebml_read_master(matroska, length)) < 0)
1181  return res;
1182  if (id == MATROSKA_ID_SEGMENT)
1183  matroska->segment_start = avio_tell(matroska->ctx->pb);
1184  if (id == MATROSKA_ID_CUES)
1185  matroska->cues_parsing_deferred = 0;
1186  if (syntax->type == EBML_LEVEL1 &&
1187  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1188  if (level1_elem->parsed)
1189  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1190  level1_elem->parsed = 1;
1191  }
1192  return ebml_parse_nest(matroska, syntax->def.n, data);
1193  case EBML_PASS:
1194  return ebml_parse_id(matroska, syntax->def.n, id, data);
1195  case EBML_STOP:
1196  return 1;
1197  default:
1198  if (ffio_limit(pb, length) != length)
1199  return AVERROR(EIO);
1200  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1201  }
1202  if (res == AVERROR_INVALIDDATA)
1203  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1204  else if (res == AVERROR(EIO))
1205  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1206  return res;
1207 }
1208 
1209 static void ebml_free(EbmlSyntax *syntax, void *data)
1210 {
1211  int i, j;
1212  for (i = 0; syntax[i].id; i++) {
1213  void *data_off = (char *) data + syntax[i].data_offset;
1214  switch (syntax[i].type) {
1215  case EBML_STR:
1216  case EBML_UTF8:
1217  av_freep(data_off);
1218  break;
1219  case EBML_BIN:
1220  av_freep(&((EbmlBin *) data_off)->data);
1221  break;
1222  case EBML_LEVEL1:
1223  case EBML_NEST:
1224  if (syntax[i].list_elem_size) {
1225  EbmlList *list = data_off;
1226  char *ptr = list->elem;
1227  for (j = 0; j < list->nb_elem;
1228  j++, ptr += syntax[i].list_elem_size)
1229  ebml_free(syntax[i].def.n, ptr);
1230  av_freep(&list->elem);
1231  } else
1232  ebml_free(syntax[i].def.n, data_off);
1233  default:
1234  break;
1235  }
1236  }
1237 }
1238 
1239 /*
1240  * Autodetecting...
1241  */
1243 {
1244  uint64_t total = 0;
1245  int len_mask = 0x80, size = 1, n = 1, i;
1246 
1247  /* EBML header? */
1248  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1249  return 0;
1250 
1251  /* length of header */
1252  total = p->buf[4];
1253  while (size <= 8 && !(total & len_mask)) {
1254  size++;
1255  len_mask >>= 1;
1256  }
1257  if (size > 8)
1258  return 0;
1259  total &= (len_mask - 1);
1260  while (n < size)
1261  total = (total << 8) | p->buf[4 + n++];
1262 
1263  /* Does the probe data contain the whole header? */
1264  if (p->buf_size < 4 + size + total)
1265  return 0;
1266 
1267  /* The header should contain a known document type. For now,
1268  * we don't parse the whole header but simply check for the
1269  * availability of that array of characters inside the header.
1270  * Not fully fool-proof, but good enough. */
1271  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1272  size_t probelen = strlen(matroska_doctypes[i]);
1273  if (total < probelen)
1274  continue;
1275  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1276  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1277  return AVPROBE_SCORE_MAX;
1278  }
1279 
1280  // probably valid EBML header but no recognized doctype
1281  return AVPROBE_SCORE_EXTENSION;
1282 }
1283 
1285  int num)
1286 {
1287  MatroskaTrack *tracks = matroska->tracks.elem;
1288  int i;
1289 
1290  for (i = 0; i < matroska->tracks.nb_elem; i++)
1291  if (tracks[i].num == num)
1292  return &tracks[i];
1293 
1294  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1295  return NULL;
1296 }
1297 
1298 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1299  MatroskaTrack *track)
1300 {
1301  MatroskaTrackEncoding *encodings = track->encodings.elem;
1302  uint8_t *data = *buf;
1303  int isize = *buf_size;
1304  uint8_t *pkt_data = NULL;
1305  uint8_t av_unused *newpktdata;
1306  int pkt_size = isize;
1307  int result = 0;
1308  int olen;
1309 
1310  if (pkt_size >= 10000000U)
1311  return AVERROR_INVALIDDATA;
1312 
1313  switch (encodings[0].compression.algo) {
1315  {
1316  int header_size = encodings[0].compression.settings.size;
1317  uint8_t *header = encodings[0].compression.settings.data;
1318 
1319  if (header_size && !header) {
1320  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1321  return -1;
1322  }
1323 
1324  if (!header_size)
1325  return 0;
1326 
1327  pkt_size = isize + header_size;
1328  pkt_data = av_malloc(pkt_size);
1329  if (!pkt_data)
1330  return AVERROR(ENOMEM);
1331 
1332  memcpy(pkt_data, header, header_size);
1333  memcpy(pkt_data + header_size, data, isize);
1334  break;
1335  }
1336 #if CONFIG_LZO
1338  do {
1339  olen = pkt_size *= 3;
1340  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1341  if (!newpktdata) {
1342  result = AVERROR(ENOMEM);
1343  goto failed;
1344  }
1345  pkt_data = newpktdata;
1346  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1347  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1348  if (result) {
1349  result = AVERROR_INVALIDDATA;
1350  goto failed;
1351  }
1352  pkt_size -= olen;
1353  break;
1354 #endif
1355 #if CONFIG_ZLIB
1357  {
1358  z_stream zstream = { 0 };
1359  if (inflateInit(&zstream) != Z_OK)
1360  return -1;
1361  zstream.next_in = data;
1362  zstream.avail_in = isize;
1363  do {
1364  pkt_size *= 3;
1365  newpktdata = av_realloc(pkt_data, pkt_size);
1366  if (!newpktdata) {
1367  inflateEnd(&zstream);
1368  result = AVERROR(ENOMEM);
1369  goto failed;
1370  }
1371  pkt_data = newpktdata;
1372  zstream.avail_out = pkt_size - zstream.total_out;
1373  zstream.next_out = pkt_data + zstream.total_out;
1374  result = inflate(&zstream, Z_NO_FLUSH);
1375  } while (result == Z_OK && pkt_size < 10000000);
1376  pkt_size = zstream.total_out;
1377  inflateEnd(&zstream);
1378  if (result != Z_STREAM_END) {
1379  if (result == Z_MEM_ERROR)
1380  result = AVERROR(ENOMEM);
1381  else
1382  result = AVERROR_INVALIDDATA;
1383  goto failed;
1384  }
1385  break;
1386  }
1387 #endif
1388 #if CONFIG_BZLIB
1390  {
1391  bz_stream bzstream = { 0 };
1392  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1393  return -1;
1394  bzstream.next_in = data;
1395  bzstream.avail_in = isize;
1396  do {
1397  pkt_size *= 3;
1398  newpktdata = av_realloc(pkt_data, pkt_size);
1399  if (!newpktdata) {
1400  BZ2_bzDecompressEnd(&bzstream);
1401  result = AVERROR(ENOMEM);
1402  goto failed;
1403  }
1404  pkt_data = newpktdata;
1405  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1406  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1407  result = BZ2_bzDecompress(&bzstream);
1408  } while (result == BZ_OK && pkt_size < 10000000);
1409  pkt_size = bzstream.total_out_lo32;
1410  BZ2_bzDecompressEnd(&bzstream);
1411  if (result != BZ_STREAM_END) {
1412  if (result == BZ_MEM_ERROR)
1413  result = AVERROR(ENOMEM);
1414  else
1415  result = AVERROR_INVALIDDATA;
1416  goto failed;
1417  }
1418  break;
1419  }
1420 #endif
1421  default:
1422  return AVERROR_INVALIDDATA;
1423  }
1424 
1425  *buf = pkt_data;
1426  *buf_size = pkt_size;
1427  return 0;
1428 
1429 failed:
1430  av_free(pkt_data);
1431  return result;
1432 }
1433 
1435  AVDictionary **metadata, char *prefix)
1436 {
1437  MatroskaTag *tags = list->elem;
1438  char key[1024];
1439  int i;
1440 
1441  for (i = 0; i < list->nb_elem; i++) {
1442  const char *lang = tags[i].lang &&
1443  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1444 
1445  if (!tags[i].name) {
1446  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1447  continue;
1448  }
1449  if (prefix)
1450  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1451  else
1452  av_strlcpy(key, tags[i].name, sizeof(key));
1453  if (tags[i].def || !lang) {
1454  av_dict_set(metadata, key, tags[i].string, 0);
1455  if (tags[i].sub.nb_elem)
1456  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1457  }
1458  if (lang) {
1459  av_strlcat(key, "-", sizeof(key));
1460  av_strlcat(key, lang, sizeof(key));
1461  av_dict_set(metadata, key, tags[i].string, 0);
1462  if (tags[i].sub.nb_elem)
1463  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1464  }
1465  }
1467 }
1468 
1470 {
1471  MatroskaDemuxContext *matroska = s->priv_data;
1472  MatroskaTags *tags = matroska->tags.elem;
1473  int i, j;
1474 
1475  for (i = 0; i < matroska->tags.nb_elem; i++) {
1476  if (tags[i].target.attachuid) {
1477  MatroskaAttachment *attachment = matroska->attachments.elem;
1478  int found = 0;
1479  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1480  if (attachment[j].uid == tags[i].target.attachuid &&
1481  attachment[j].stream) {
1482  matroska_convert_tag(s, &tags[i].tag,
1483  &attachment[j].stream->metadata, NULL);
1484  found = 1;
1485  }
1486  }
1487  if (!found) {
1489  "The tags at index %d refer to a "
1490  "non-existent attachment %"PRId64".\n",
1491  i, tags[i].target.attachuid);
1492  }
1493  } else if (tags[i].target.chapteruid) {
1494  MatroskaChapter *chapter = matroska->chapters.elem;
1495  int found = 0;
1496  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1497  if (chapter[j].uid == tags[i].target.chapteruid &&
1498  chapter[j].chapter) {
1499  matroska_convert_tag(s, &tags[i].tag,
1500  &chapter[j].chapter->metadata, NULL);
1501  found = 1;
1502  }
1503  }
1504  if (!found) {
1506  "The tags at index %d refer to a non-existent chapter "
1507  "%"PRId64".\n",
1508  i, tags[i].target.chapteruid);
1509  }
1510  } else if (tags[i].target.trackuid) {
1511  MatroskaTrack *track = matroska->tracks.elem;
1512  int found = 0;
1513  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1514  if (track[j].uid == tags[i].target.trackuid &&
1515  track[j].stream) {
1516  matroska_convert_tag(s, &tags[i].tag,
1517  &track[j].stream->metadata, NULL);
1518  found = 1;
1519  }
1520  }
1521  if (!found) {
1523  "The tags at index %d refer to a non-existent track "
1524  "%"PRId64".\n",
1525  i, tags[i].target.trackuid);
1526  }
1527  } else {
1528  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1529  tags[i].target.type);
1530  }
1531  }
1532 }
1533 
1535  uint64_t pos)
1536 {
1537  uint32_t level_up = matroska->level_up;
1538  uint32_t saved_id = matroska->current_id;
1539  int64_t before_pos = avio_tell(matroska->ctx->pb);
1541  int64_t offset;
1542  int ret = 0;
1543 
1544  /* seek */
1545  offset = pos + matroska->segment_start;
1546  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1547  /* We don't want to lose our seekhead level, so we add
1548  * a dummy. This is a crude hack. */
1549  if (matroska->num_levels == EBML_MAX_DEPTH) {
1550  av_log(matroska->ctx, AV_LOG_INFO,
1551  "Max EBML element depth (%d) reached, "
1552  "cannot parse further.\n", EBML_MAX_DEPTH);
1553  ret = AVERROR_INVALIDDATA;
1554  } else {
1555  level.start = 0;
1556  level.length = (uint64_t) -1;
1557  matroska->levels[matroska->num_levels] = level;
1558  matroska->num_levels++;
1559  matroska->current_id = 0;
1560 
1561  ret = ebml_parse(matroska, matroska_segment, matroska);
1562 
1563  /* remove dummy level */
1564  while (matroska->num_levels) {
1565  uint64_t length = matroska->levels[--matroska->num_levels].length;
1566  if (length == (uint64_t) -1)
1567  break;
1568  }
1569  }
1570  }
1571  /* seek back */
1572  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1573  matroska->level_up = level_up;
1574  matroska->current_id = saved_id;
1575 
1576  return ret;
1577 }
1578 
1580 {
1581  EbmlList *seekhead_list = &matroska->seekhead;
1582  int i;
1583 
1584  // we should not do any seeking in the streaming case
1585  if (!matroska->ctx->pb->seekable)
1586  return;
1587 
1588  for (i = 0; i < seekhead_list->nb_elem; i++) {
1589  MatroskaSeekhead *seekheads = seekhead_list->elem;
1590  uint32_t id = seekheads[i].id;
1591  uint64_t pos = seekheads[i].pos;
1592 
1593  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1594  if (!elem || elem->parsed)
1595  continue;
1596 
1597  elem->pos = pos;
1598 
1599  // defer cues parsing until we actually need cue data.
1600  if (id == MATROSKA_ID_CUES)
1601  continue;
1602 
1603  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1604  // mark index as broken
1605  matroska->cues_parsing_deferred = -1;
1606  break;
1607  }
1608 
1609  elem->parsed = 1;
1610  }
1611 }
1612 
1614 {
1615  EbmlList *index_list;
1617  uint64_t index_scale = 1;
1618  int i, j;
1619 
1620  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1621  return;
1622 
1623  index_list = &matroska->index;
1624  index = index_list->elem;
1625  if (index_list->nb_elem < 2)
1626  return;
1627  if (index[1].time > 1E14 / matroska->time_scale) {
1628  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1629  return;
1630  }
1631  for (i = 0; i < index_list->nb_elem; i++) {
1632  EbmlList *pos_list = &index[i].pos;
1633  MatroskaIndexPos *pos = pos_list->elem;
1634  for (j = 0; j < pos_list->nb_elem; j++) {
1635  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1636  pos[j].track);
1637  if (track && track->stream)
1638  av_add_index_entry(track->stream,
1639  pos[j].pos + matroska->segment_start,
1640  index[i].time / index_scale, 0, 0,
1642  }
1643  }
1644 }
1645 
1647  int i;
1648 
1649  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1650  return;
1651 
1652  for (i = 0; i < matroska->num_level1_elems; i++) {
1653  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1654  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1655  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1656  matroska->cues_parsing_deferred = -1;
1657  elem->parsed = 1;
1658  break;
1659  }
1660  }
1661 
1662  matroska_add_index_entries(matroska);
1663 }
1664 
1666 {
1667  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1668  int profile;
1669 
1670  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1671  if (strstr(codec_id, aac_profiles[profile]))
1672  break;
1673  return profile + 1;
1674 }
1675 
1676 static int matroska_aac_sri(int samplerate)
1677 {
1678  int sri;
1679 
1680  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1681  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1682  break;
1683  return sri;
1684 }
1685 
1686 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1687 {
1688  char buffer[32];
1689  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1690  time_t creation_time = date_utc / 1000000000 + 978307200;
1691  struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1692  if (!ptm) return;
1693  if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1694  av_dict_set(metadata, "creation_time", buffer, 0);
1695 }
1696 
1698  MatroskaTrack *track,
1699  int *offset)
1700 {
1701  AVStream *st = track->stream;
1702  uint8_t *p = track->codec_priv.data;
1703  int size = track->codec_priv.size;
1704 
1705  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1706  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1707  track->codec_priv.size = 0;
1708  return 0;
1709  }
1710  *offset = 8;
1711  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1712 
1713  p += track->codec_priv.size;
1714  size -= track->codec_priv.size;
1715 
1716  /* parse the remaining metadata blocks if present */
1717  while (size >= 4) {
1718  int block_last, block_type, block_size;
1719 
1720  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1721 
1722  p += 4;
1723  size -= 4;
1724  if (block_size > size)
1725  return 0;
1726 
1727  /* check for the channel mask */
1728  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1729  AVDictionary *dict = NULL;
1730  AVDictionaryEntry *chmask;
1731 
1732  ff_vorbis_comment(s, &dict, p, block_size, 0);
1733  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1734  if (chmask) {
1735  uint64_t mask = strtol(chmask->value, NULL, 0);
1736  if (!mask || mask & ~0x3ffffULL) {
1738  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1739  } else
1740  st->codecpar->channel_layout = mask;
1741  }
1742  av_dict_free(&dict);
1743  }
1744 
1745  p += block_size;
1746  size -= block_size;
1747  }
1748 
1749  return 0;
1750 }
1751 
1752 static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
1753 {
1754  switch (stereo_mode) {
1760  break;
1765  *h_width = 2;
1766  break;
1771  *h_height = 2;
1772  break;
1773  }
1774 }
1775 
1776 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1777  const MatroskaMasteringMeta* mastering_meta =
1778  &track->video.color.mastering_meta;
1779  // Mastering primaries are CIE 1931 coords, and must be > 0.
1780  const int has_mastering_primaries =
1781  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1782  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1783  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1784  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1785  const int has_mastering_luminance = mastering_meta->max_luminance > 0;
1786 
1789  if (track->video.color.primaries != AVCOL_PRI_RESERVED)
1793  if (track->video.color.range != AVCOL_RANGE_UNSPECIFIED &&
1794  track->video.color.range <= AVCOL_RANGE_JPEG)
1795  st->codecpar->color_range = track->video.color.range;
1796 
1797  if (has_mastering_primaries || has_mastering_luminance) {
1798  // Use similar rationals as other standards.
1799  const int chroma_den = 50000;
1800  const int luma_den = 10000;
1801  AVMasteringDisplayMetadata *metadata =
1804  sizeof(AVMasteringDisplayMetadata));
1805  if (!metadata) {
1806  return AVERROR(ENOMEM);
1807  }
1808  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1809  if (has_mastering_primaries) {
1810  metadata->display_primaries[0][0] = av_make_q(
1811  round(mastering_meta->r_x * chroma_den), chroma_den);
1812  metadata->display_primaries[0][1] = av_make_q(
1813  round(mastering_meta->r_y * chroma_den), chroma_den);
1814  metadata->display_primaries[1][0] = av_make_q(
1815  round(mastering_meta->g_x * chroma_den), chroma_den);
1816  metadata->display_primaries[1][1] = av_make_q(
1817  round(mastering_meta->g_y * chroma_den), chroma_den);
1818  metadata->display_primaries[2][0] = av_make_q(
1819  round(mastering_meta->b_x * chroma_den), chroma_den);
1820  metadata->display_primaries[2][1] = av_make_q(
1821  round(mastering_meta->b_y * chroma_den), chroma_den);
1822  metadata->white_point[0] = av_make_q(
1823  round(mastering_meta->white_x * chroma_den), chroma_den);
1824  metadata->white_point[1] = av_make_q(
1825  round(mastering_meta->white_y * chroma_den), chroma_den);
1826  metadata->has_primaries = 1;
1827  }
1828  if (has_mastering_luminance) {
1829  metadata->max_luminance = av_make_q(
1830  round(mastering_meta->max_luminance * luma_den), luma_den);
1831  metadata->min_luminance = av_make_q(
1832  round(mastering_meta->min_luminance * luma_den), luma_den);
1833  metadata->has_luminance = 1;
1834  }
1835  }
1836  return 0;
1837 }
1838 
1839 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1840 {
1841  const AVCodecTag *codec_tags;
1842 
1843  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1845 
1846  /* Normalize noncompliant private data that starts with the fourcc
1847  * by expanding/shifting the data by 4 bytes and storing the data
1848  * size at the start. */
1849  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1850  uint8_t *p = av_realloc(track->codec_priv.data,
1851  track->codec_priv.size + 4);
1852  if (!p)
1853  return AVERROR(ENOMEM);
1854  memmove(p + 4, p, track->codec_priv.size);
1855  track->codec_priv.data = p;
1856  track->codec_priv.size += 4;
1857  AV_WB32(track->codec_priv.data, track->codec_priv.size);
1858  }
1859 
1860  *fourcc = AV_RL32(track->codec_priv.data + 4);
1861  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1862 
1863  return 0;
1864 }
1865 
1867 {
1868  MatroskaDemuxContext *matroska = s->priv_data;
1869  MatroskaTrack *tracks = matroska->tracks.elem;
1870  AVStream *st;
1871  int i, j, ret;
1872  int k;
1873 
1874  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1875  MatroskaTrack *track = &tracks[i];
1877  EbmlList *encodings_list = &track->encodings;
1878  MatroskaTrackEncoding *encodings = encodings_list->elem;
1879  uint8_t *extradata = NULL;
1880  int extradata_size = 0;
1881  int extradata_offset = 0;
1882  uint32_t fourcc = 0;
1883  AVIOContext b;
1884  char* key_id_base64 = NULL;
1885  int bit_depth = -1;
1886 
1887  /* Apply some sanity checks. */
1888  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1889  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1890  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1891  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1892  av_log(matroska->ctx, AV_LOG_INFO,
1893  "Unknown or unsupported track type %"PRIu64"\n",
1894  track->type);
1895  continue;
1896  }
1897  if (!track->codec_id)
1898  continue;
1899 
1900  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1901  isnan(track->audio.samplerate)) {
1902  av_log(matroska->ctx, AV_LOG_WARNING,
1903  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1904  track->audio.samplerate);
1905  track->audio.samplerate = 8000;
1906  }
1907 
1908  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1909  if (!track->default_duration && track->video.frame_rate > 0)
1910  track->default_duration = 1000000000 / track->video.frame_rate;
1911  if (track->video.display_width == -1)
1912  track->video.display_width = track->video.pixel_width;
1913  if (track->video.display_height == -1)
1914  track->video.display_height = track->video.pixel_height;
1915  if (track->video.color_space.size == 4)
1916  fourcc = AV_RL32(track->video.color_space.data);
1917  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1918  if (!track->audio.out_samplerate)
1919  track->audio.out_samplerate = track->audio.samplerate;
1920  }
1921  if (encodings_list->nb_elem > 1) {
1922  av_log(matroska->ctx, AV_LOG_ERROR,
1923  "Multiple combined encodings not supported");
1924  } else if (encodings_list->nb_elem == 1) {
1925  if (encodings[0].type) {
1926  if (encodings[0].encryption.key_id.size > 0) {
1927  /* Save the encryption key id to be stored later as a
1928  metadata tag. */
1929  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1930  key_id_base64 = av_malloc(b64_size);
1931  if (key_id_base64 == NULL)
1932  return AVERROR(ENOMEM);
1933 
1934  av_base64_encode(key_id_base64, b64_size,
1935  encodings[0].encryption.key_id.data,
1936  encodings[0].encryption.key_id.size);
1937  } else {
1938  encodings[0].scope = 0;
1939  av_log(matroska->ctx, AV_LOG_ERROR,
1940  "Unsupported encoding type");
1941  }
1942  } else if (
1943 #if CONFIG_ZLIB
1944  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1945 #endif
1946 #if CONFIG_BZLIB
1948 #endif
1949 #if CONFIG_LZO
1951 #endif
1953  encodings[0].scope = 0;
1954  av_log(matroska->ctx, AV_LOG_ERROR,
1955  "Unsupported encoding type");
1956  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1957  uint8_t *codec_priv = track->codec_priv.data;
1958  int ret = matroska_decode_buffer(&track->codec_priv.data,
1959  &track->codec_priv.size,
1960  track);
1961  if (ret < 0) {
1962  track->codec_priv.data = NULL;
1963  track->codec_priv.size = 0;
1964  av_log(matroska->ctx, AV_LOG_ERROR,
1965  "Failed to decode codec private data\n");
1966  }
1967 
1968  if (codec_priv != track->codec_priv.data)
1969  av_free(codec_priv);
1970  }
1971  }
1972 
1973  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1974  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1975  strlen(ff_mkv_codec_tags[j].str))) {
1976  codec_id = ff_mkv_codec_tags[j].id;
1977  break;
1978  }
1979  }
1980 
1981  st = track->stream = avformat_new_stream(s, NULL);
1982  if (!st) {
1983  av_free(key_id_base64);
1984  return AVERROR(ENOMEM);
1985  }
1986 
1987  if (key_id_base64) {
1988  /* export encryption key id as base64 metadata tag */
1989  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
1990  av_freep(&key_id_base64);
1991  }
1992 
1993  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
1994  track->codec_priv.size >= 40 &&
1995  track->codec_priv.data) {
1996  track->ms_compat = 1;
1997  bit_depth = AV_RL16(track->codec_priv.data + 14);
1998  fourcc = AV_RL32(track->codec_priv.data + 16);
2000  fourcc);
2001  if (!codec_id)
2003  fourcc);
2004  extradata_offset = 40;
2005  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2006  track->codec_priv.size >= 14 &&
2007  track->codec_priv.data) {
2008  int ret;
2009  ffio_init_context(&b, track->codec_priv.data,
2010  track->codec_priv.size,
2011  0, NULL, NULL, NULL, NULL);
2012  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2013  if (ret < 0)
2014  return ret;
2015  codec_id = st->codecpar->codec_id;
2016  fourcc = st->codecpar->codec_tag;
2017  extradata_offset = FFMIN(track->codec_priv.size, 18);
2018  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2019  /* Normally 36, but allow noncompliant private data */
2020  && (track->codec_priv.size >= 32)
2021  && (track->codec_priv.data)) {
2022  uint16_t sample_size;
2023  int ret = get_qt_codec(track, &fourcc, &codec_id);
2024  if (ret < 0)
2025  return ret;
2026  sample_size = AV_RB16(track->codec_priv.data + 26);
2027  if (fourcc == 0) {
2028  if (sample_size == 8) {
2029  fourcc = MKTAG('r','a','w',' ');
2030  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2031  } else if (sample_size == 16) {
2032  fourcc = MKTAG('t','w','o','s');
2033  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2034  }
2035  }
2036  if ((fourcc == MKTAG('t','w','o','s') ||
2037  fourcc == MKTAG('s','o','w','t')) &&
2038  sample_size == 8)
2039  codec_id = AV_CODEC_ID_PCM_S8;
2040  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2041  (track->codec_priv.size >= 21) &&
2042  (track->codec_priv.data)) {
2043  int ret = get_qt_codec(track, &fourcc, &codec_id);
2044  if (ret < 0)
2045  return ret;
2046  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2047  fourcc = MKTAG('S','V','Q','3');
2048  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2049  }
2050  if (codec_id == AV_CODEC_ID_NONE) {
2051  char buf[32];
2052  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2053  av_log(matroska->ctx, AV_LOG_ERROR,
2054  "mov FourCC not found %s.\n", buf);
2055  }
2056  if (track->codec_priv.size >= 86) {
2057  bit_depth = AV_RB16(track->codec_priv.data + 82);
2058  ffio_init_context(&b, track->codec_priv.data,
2059  track->codec_priv.size,
2060  0, NULL, NULL, NULL, NULL);
2061  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2062  bit_depth &= 0x1F;
2063  track->has_palette = 1;
2064  }
2065  }
2066  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2067  switch (track->audio.bitdepth) {
2068  case 8:
2069  codec_id = AV_CODEC_ID_PCM_U8;
2070  break;
2071  case 24:
2072  codec_id = AV_CODEC_ID_PCM_S24BE;
2073  break;
2074  case 32:
2075  codec_id = AV_CODEC_ID_PCM_S32BE;
2076  break;
2077  }
2078  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2079  switch (track->audio.bitdepth) {
2080  case 8:
2081  codec_id = AV_CODEC_ID_PCM_U8;
2082  break;
2083  case 24:
2084  codec_id = AV_CODEC_ID_PCM_S24LE;
2085  break;
2086  case 32:
2087  codec_id = AV_CODEC_ID_PCM_S32LE;
2088  break;
2089  }
2090  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2091  track->audio.bitdepth == 64) {
2092  codec_id = AV_CODEC_ID_PCM_F64LE;
2093  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2094  int profile = matroska_aac_profile(track->codec_id);
2095  int sri = matroska_aac_sri(track->audio.samplerate);
2096  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2097  if (!extradata)
2098  return AVERROR(ENOMEM);
2099  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2100  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2101  if (strstr(track->codec_id, "SBR")) {
2102  sri = matroska_aac_sri(track->audio.out_samplerate);
2103  extradata[2] = 0x56;
2104  extradata[3] = 0xE5;
2105  extradata[4] = 0x80 | (sri << 3);
2106  extradata_size = 5;
2107  } else
2108  extradata_size = 2;
2109  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2110  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2111  * Create the "atom size", "tag", and "tag version" fields the
2112  * decoder expects manually. */
2113  extradata_size = 12 + track->codec_priv.size;
2114  extradata = av_mallocz(extradata_size +
2116  if (!extradata)
2117  return AVERROR(ENOMEM);
2118  AV_WB32(extradata, extradata_size);
2119  memcpy(&extradata[4], "alac", 4);
2120  AV_WB32(&extradata[8], 0);
2121  memcpy(&extradata[12], track->codec_priv.data,
2122  track->codec_priv.size);
2123  } else if (codec_id == AV_CODEC_ID_TTA) {
2124  extradata_size = 30;
2125  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2126  if (!extradata)
2127  return AVERROR(ENOMEM);
2128  ffio_init_context(&b, extradata, extradata_size, 1,
2129  NULL, NULL, NULL, NULL);
2130  avio_write(&b, "TTA1", 4);
2131  avio_wl16(&b, 1);
2132  if (track->audio.channels > UINT16_MAX ||
2133  track->audio.bitdepth > UINT16_MAX) {
2134  av_log(matroska->ctx, AV_LOG_WARNING,
2135  "Too large audio channel number %"PRIu64
2136  " or bitdepth %"PRIu64". Skipping track.\n",
2137  track->audio.channels, track->audio.bitdepth);
2138  av_freep(&extradata);
2139  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2140  return AVERROR_INVALIDDATA;
2141  else
2142  continue;
2143  }
2144  avio_wl16(&b, track->audio.channels);
2145  avio_wl16(&b, track->audio.bitdepth);
2146  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2147  return AVERROR_INVALIDDATA;
2148  avio_wl32(&b, track->audio.out_samplerate);
2149  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2150  track->audio.out_samplerate,
2151  AV_TIME_BASE * 1000));
2152  } else if (codec_id == AV_CODEC_ID_RV10 ||
2153  codec_id == AV_CODEC_ID_RV20 ||
2154  codec_id == AV_CODEC_ID_RV30 ||
2155  codec_id == AV_CODEC_ID_RV40) {
2156  extradata_offset = 26;
2157  } else if (codec_id == AV_CODEC_ID_RA_144) {
2158  track->audio.out_samplerate = 8000;
2159  track->audio.channels = 1;
2160  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2161  codec_id == AV_CODEC_ID_COOK ||
2162  codec_id == AV_CODEC_ID_ATRAC3 ||
2163  codec_id == AV_CODEC_ID_SIPR)
2164  && track->codec_priv.data) {
2165  int flavor;
2166 
2167  ffio_init_context(&b, track->codec_priv.data,
2168  track->codec_priv.size,
2169  0, NULL, NULL, NULL, NULL);
2170  avio_skip(&b, 22);
2171  flavor = avio_rb16(&b);
2172  track->audio.coded_framesize = avio_rb32(&b);
2173  avio_skip(&b, 12);
2174  track->audio.sub_packet_h = avio_rb16(&b);
2175  track->audio.frame_size = avio_rb16(&b);
2176  track->audio.sub_packet_size = avio_rb16(&b);
2177  if (flavor < 0 ||
2178  track->audio.coded_framesize <= 0 ||
2179  track->audio.sub_packet_h <= 0 ||
2180  track->audio.frame_size <= 0 ||
2181  track->audio.sub_packet_size <= 0)
2182  return AVERROR_INVALIDDATA;
2183  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2184  track->audio.frame_size);
2185  if (!track->audio.buf)
2186  return AVERROR(ENOMEM);
2187  if (codec_id == AV_CODEC_ID_RA_288) {
2188  st->codecpar->block_align = track->audio.coded_framesize;
2189  track->codec_priv.size = 0;
2190  } else {
2191  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2192  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2193  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2194  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2195  }
2196  st->codecpar->block_align = track->audio.sub_packet_size;
2197  extradata_offset = 78;
2198  }
2199  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2200  ret = matroska_parse_flac(s, track, &extradata_offset);
2201  if (ret < 0)
2202  return ret;
2203  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2204  fourcc = AV_RL32(track->codec_priv.data);
2205  }
2206  track->codec_priv.size -= extradata_offset;
2207 
2208  if (codec_id == AV_CODEC_ID_NONE)
2209  av_log(matroska->ctx, AV_LOG_INFO,
2210  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2211 
2212  if (track->time_scale < 0.01)
2213  track->time_scale = 1.0;
2214  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2215  1000 * 1000 * 1000); /* 64 bit pts in ns */
2216 
2217  /* convert the delay from ns to the track timebase */
2218  track->codec_delay = av_rescale_q(track->codec_delay,
2219  (AVRational){ 1, 1000000000 },
2220  st->time_base);
2221 
2222  st->codecpar->codec_id = codec_id;
2223 
2224  if (strcmp(track->language, "und"))
2225  av_dict_set(&st->metadata, "language", track->language, 0);
2226  av_dict_set(&st->metadata, "title", track->name, 0);
2227 
2228  if (track->flag_default)
2230  if (track->flag_forced)
2232 
2233  if (!st->codecpar->extradata) {
2234  if (extradata) {
2235  st->codecpar->extradata = extradata;
2236  st->codecpar->extradata_size = extradata_size;
2237  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2238  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2239  return AVERROR(ENOMEM);
2240  memcpy(st->codecpar->extradata,
2241  track->codec_priv.data + extradata_offset,
2242  track->codec_priv.size);
2243  }
2244  }
2245 
2246  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2247  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2248  int display_width_mul = 1;
2249  int display_height_mul = 1;
2250 
2252  st->codecpar->codec_tag = fourcc;
2253  if (bit_depth >= 0)
2255  st->codecpar->width = track->video.pixel_width;
2256  st->codecpar->height = track->video.pixel_height;
2257 
2258  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2259  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2260 
2262  &st->sample_aspect_ratio.den,
2263  st->codecpar->height * track->video.display_width * display_width_mul,
2264  st->codecpar->width * track->video.display_height * display_height_mul,
2265  255);
2266  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2268 
2269  if (track->default_duration) {
2271  1000000000, track->default_duration, 30000);
2272 #if FF_API_R_FRAME_RATE
2273  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2274  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2275  st->r_frame_rate = st->avg_frame_rate;
2276 #endif
2277  }
2278 
2279  /* export stereo mode flag as metadata tag */
2280  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2281  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2282 
2283  /* export alpha mode flag as metadata tag */
2284  if (track->video.alpha_mode)
2285  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2286 
2287  /* if we have virtual track, mark the real tracks */
2288  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2289  char buf[32];
2290  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2291  continue;
2292  snprintf(buf, sizeof(buf), "%s_%d",
2293  ff_matroska_video_stereo_plane[planes[j].type], i);
2294  for (k=0; k < matroska->tracks.nb_elem; k++)
2295  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2296  av_dict_set(&tracks[k].stream->metadata,
2297  "stereo_mode", buf, 0);
2298  break;
2299  }
2300  }
2301  // add stream level stereo3d side data if it is a supported format
2302  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2303  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2304  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2305  if (ret < 0)
2306  return ret;
2307  }
2308 
2310  int ret = mkv_parse_video_color(st, track);
2311  if (ret < 0)
2312  return ret;
2313  }
2314  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2316  st->codecpar->codec_tag = fourcc;
2317  st->codecpar->sample_rate = track->audio.out_samplerate;
2318  st->codecpar->channels = track->audio.channels;
2319  if (!st->codecpar->bits_per_coded_sample)
2320  st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2321  if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2323  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2325  if (track->codec_delay > 0) {
2326  st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2327  st->time_base,
2328  (AVRational){1, st->codecpar->sample_rate});
2329  }
2330  if (track->seek_preroll > 0) {
2331  st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2332  (AVRational){1, 1000000000},
2333  (AVRational){1, st->codecpar->sample_rate});
2334  }
2335  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2336  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2337 
2338  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2339  st->disposition |= AV_DISPOSITION_CAPTIONS;
2340  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2341  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2342  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2343  st->disposition |= AV_DISPOSITION_METADATA;
2344  }
2345  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2346  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2347  if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2348  matroska->contains_ssa = 1;
2349  }
2350  }
2351 
2352  return 0;
2353 }
2354 
2356 {
2357  MatroskaDemuxContext *matroska = s->priv_data;
2358  EbmlList *attachments_list = &matroska->attachments;
2359  EbmlList *chapters_list = &matroska->chapters;
2360  MatroskaAttachment *attachments;
2361  MatroskaChapter *chapters;
2362  uint64_t max_start = 0;
2363  int64_t pos;
2364  Ebml ebml = { 0 };
2365  int i, j, res;
2366 
2367  matroska->ctx = s;
2368  matroska->cues_parsing_deferred = 1;
2369 
2370  /* First read the EBML header. */
2371  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2372  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2373  ebml_free(ebml_syntax, &ebml);
2374  return AVERROR_INVALIDDATA;
2375  }
2376  if (ebml.version > EBML_VERSION ||
2377  ebml.max_size > sizeof(uint64_t) ||
2378  ebml.id_length > sizeof(uint32_t) ||
2379  ebml.doctype_version > 3) {
2380  av_log(matroska->ctx, AV_LOG_ERROR,
2381  "EBML header using unsupported features\n"
2382  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2383  ebml.version, ebml.doctype, ebml.doctype_version);
2384  ebml_free(ebml_syntax, &ebml);
2385  return AVERROR_PATCHWELCOME;
2386  } else if (ebml.doctype_version == 3) {
2387  av_log(matroska->ctx, AV_LOG_WARNING,
2388  "EBML header using unsupported features\n"
2389  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2390  ebml.version, ebml.doctype, ebml.doctype_version);
2391  }
2392  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2393  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2394  break;
2395  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2396  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2397  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2398  ebml_free(ebml_syntax, &ebml);
2399  return AVERROR_INVALIDDATA;
2400  }
2401  }
2402  ebml_free(ebml_syntax, &ebml);
2403 
2404  /* The next thing is a segment. */
2405  pos = avio_tell(matroska->ctx->pb);
2406  res = ebml_parse(matroska, matroska_segments, matroska);
2407  // try resyncing until we find a EBML_STOP type element.
2408  while (res != 1) {
2409  res = matroska_resync(matroska, pos);
2410  if (res < 0)
2411  return res;
2412  pos = avio_tell(matroska->ctx->pb);
2413  res = ebml_parse(matroska, matroska_segment, matroska);
2414  }
2415  matroska_execute_seekhead(matroska);
2416 
2417  if (!matroska->time_scale)
2418  matroska->time_scale = 1000000;
2419  if (matroska->duration)
2420  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2421  1000 / AV_TIME_BASE;
2422  av_dict_set(&s->metadata, "title", matroska->title, 0);
2423  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2424 
2425  if (matroska->date_utc.size == 8)
2427 
2428  res = matroska_parse_tracks(s);
2429  if (res < 0)
2430  return res;
2431 
2432  attachments = attachments_list->elem;
2433  for (j = 0; j < attachments_list->nb_elem; j++) {
2434  if (!(attachments[j].filename && attachments[j].mime &&
2435  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2436  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2437  } else {
2438  AVStream *st = avformat_new_stream(s, NULL);
2439  if (!st)
2440  break;
2441  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2442  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2444 
2445  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2446  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2447  strlen(ff_mkv_image_mime_tags[i].str))) {
2449  break;
2450  }
2451  }
2452 
2453  attachments[j].stream = st;
2454 
2455  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2458 
2460  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2461  return res;
2462  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2463  st->attached_pic.stream_index = st->index;
2465  } else {
2467  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2468  break;
2469  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2470  attachments[j].bin.size);
2471 
2472  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2473  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2474  strlen(ff_mkv_mime_tags[i].str))) {
2476  break;
2477  }
2478  }
2479  }
2480  }
2481  }
2482 
2483  chapters = chapters_list->elem;
2484  for (i = 0; i < chapters_list->nb_elem; i++)
2485  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2486  (max_start == 0 || chapters[i].start > max_start)) {
2487  chapters[i].chapter =
2488  avpriv_new_chapter(s, chapters[i].uid,
2489  (AVRational) { 1, 1000000000 },
2490  chapters[i].start, chapters[i].end,
2491  chapters[i].title);
2492  if (chapters[i].chapter) {
2493  av_dict_set(&chapters[i].chapter->metadata,
2494  "title", chapters[i].title, 0);
2495  }
2496  max_start = chapters[i].start;
2497  }
2498 
2499  matroska_add_index_entries(matroska);
2500 
2502 
2503  return 0;
2504 }
2505 
2506 /*
2507  * Put one packet in an application-supplied AVPacket struct.
2508  * Returns 0 on success or -1 on failure.
2509  */
2511  AVPacket *pkt)
2512 {
2513  if (matroska->num_packets > 0) {
2514  MatroskaTrack *tracks = matroska->tracks.elem;
2515  MatroskaTrack *track;
2516  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2517  av_freep(&matroska->packets[0]);
2518  track = &tracks[pkt->stream_index];
2519  if (track->has_palette) {
2521  if (!pal) {
2522  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2523  } else {
2524  memcpy(pal, track->palette, AVPALETTE_SIZE);
2525  }
2526  track->has_palette = 0;
2527  }
2528  if (matroska->num_packets > 1) {
2529  void *newpackets;
2530  memmove(&matroska->packets[0], &matroska->packets[1],
2531  (matroska->num_packets - 1) * sizeof(AVPacket *));
2532  newpackets = av_realloc(matroska->packets,
2533  (matroska->num_packets - 1) *
2534  sizeof(AVPacket *));
2535  if (newpackets)
2536  matroska->packets = newpackets;
2537  } else {
2538  av_freep(&matroska->packets);
2539  matroska->prev_pkt = NULL;
2540  }
2541  matroska->num_packets--;
2542  return 0;
2543  }
2544 
2545  return -1;
2546 }
2547 
2548 /*
2549  * Free all packets in our internal queue.
2550  */
2552 {
2553  matroska->prev_pkt = NULL;
2554  if (matroska->packets) {
2555  int n;
2556  for (n = 0; n < matroska->num_packets; n++) {
2557  av_packet_unref(matroska->packets[n]);
2558  av_freep(&matroska->packets[n]);
2559  }
2560  av_freep(&matroska->packets);
2561  matroska->num_packets = 0;
2562  }
2563 }
2564 
2566  int *buf_size, int type,
2567  uint32_t **lace_buf, int *laces)
2568 {
2569  int res = 0, n, size = *buf_size;
2570  uint8_t *data = *buf;
2571  uint32_t *lace_size;
2572 
2573  if (!type) {
2574  *laces = 1;
2575  *lace_buf = av_mallocz(sizeof(int));
2576  if (!*lace_buf)
2577  return AVERROR(ENOMEM);
2578 
2579  *lace_buf[0] = size;
2580  return 0;
2581  }
2582 
2583  av_assert0(size > 0);
2584  *laces = *data + 1;
2585  data += 1;
2586  size -= 1;
2587  lace_size = av_mallocz(*laces * sizeof(int));
2588  if (!lace_size)
2589  return AVERROR(ENOMEM);
2590 
2591  switch (type) {
2592  case 0x1: /* Xiph lacing */
2593  {
2594  uint8_t temp;
2595  uint32_t total = 0;
2596  for (n = 0; res == 0 && n < *laces - 1; n++) {
2597  while (1) {
2598  if (size <= total) {
2599  res = AVERROR_INVALIDDATA;
2600  break;
2601  }
2602  temp = *data;
2603  total += temp;
2604  lace_size[n] += temp;
2605  data += 1;
2606  size -= 1;
2607  if (temp != 0xff)
2608  break;
2609  }
2610  }
2611  if (size <= total) {
2612  res = AVERROR_INVALIDDATA;
2613  break;
2614  }
2615 
2616  lace_size[n] = size - total;
2617  break;
2618  }
2619 
2620  case 0x2: /* fixed-size lacing */
2621  if (size % (*laces)) {
2622  res = AVERROR_INVALIDDATA;
2623  break;
2624  }
2625  for (n = 0; n < *laces; n++)
2626  lace_size[n] = size / *laces;
2627  break;
2628 
2629  case 0x3: /* EBML lacing */
2630  {
2631  uint64_t num;
2632  uint64_t total;
2633  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2634  if (n < 0 || num > INT_MAX) {
2635  av_log(matroska->ctx, AV_LOG_INFO,
2636  "EBML block data error\n");
2637  res = n<0 ? n : AVERROR_INVALIDDATA;
2638  break;
2639  }
2640  data += n;
2641  size -= n;
2642  total = lace_size[0] = num;
2643  for (n = 1; res == 0 && n < *laces - 1; n++) {
2644  int64_t snum;
2645  int r;
2646  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2647  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2648  av_log(matroska->ctx, AV_LOG_INFO,
2649  "EBML block data error\n");
2650  res = r<0 ? r : AVERROR_INVALIDDATA;
2651  break;
2652  }
2653  data += r;
2654  size -= r;
2655  lace_size[n] = lace_size[n - 1] + snum;
2656  total += lace_size[n];
2657  }
2658  if (size <= total) {
2659  res = AVERROR_INVALIDDATA;
2660  break;
2661  }
2662  lace_size[*laces - 1] = size - total;
2663  break;
2664  }
2665  }
2666 
2667  *buf = data;
2668  *lace_buf = lace_size;
2669  *buf_size = size;
2670 
2671  return res;
2672 }
2673 
2675  MatroskaTrack *track, AVStream *st,
2676  uint8_t *data, int size, uint64_t timecode,
2677  int64_t pos)
2678 {
2679  int a = st->codecpar->block_align;
2680  int sps = track->audio.sub_packet_size;
2681  int cfs = track->audio.coded_framesize;
2682  int h = track->audio.sub_packet_h;
2683  int y = track->audio.sub_packet_cnt;
2684  int w = track->audio.frame_size;
2685  int x;
2686 
2687  if (!track->audio.pkt_cnt) {
2688  if (track->audio.sub_packet_cnt == 0)
2689  track->audio.buf_timecode = timecode;
2690  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2691  if (size < cfs * h / 2) {
2692  av_log(matroska->ctx, AV_LOG_ERROR,
2693  "Corrupt int4 RM-style audio packet size\n");
2694  return AVERROR_INVALIDDATA;
2695  }
2696  for (x = 0; x < h / 2; x++)
2697  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2698  data + x * cfs, cfs);
2699  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2700  if (size < w) {
2701  av_log(matroska->ctx, AV_LOG_ERROR,
2702  "Corrupt sipr RM-style audio packet size\n");
2703  return AVERROR_INVALIDDATA;
2704  }
2705  memcpy(track->audio.buf + y * w, data, w);
2706  } else {
2707  if (size < sps * w / sps || h<=0 || w%sps) {
2708  av_log(matroska->ctx, AV_LOG_ERROR,
2709  "Corrupt generic RM-style audio packet size\n");
2710  return AVERROR_INVALIDDATA;
2711  }
2712  for (x = 0; x < w / sps; x++)
2713  memcpy(track->audio.buf +
2714  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2715  data + x * sps, sps);
2716  }
2717 
2718  if (++track->audio.sub_packet_cnt >= h) {
2719  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2720  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2721  track->audio.sub_packet_cnt = 0;
2722  track->audio.pkt_cnt = h * w / a;
2723  }
2724  }
2725 
2726  while (track->audio.pkt_cnt) {
2727  int ret;
2728  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2729  if (!pkt)
2730  return AVERROR(ENOMEM);
2731 
2732  ret = av_new_packet(pkt, a);
2733  if (ret < 0) {
2734  av_free(pkt);
2735  return ret;
2736  }
2737  memcpy(pkt->data,
2738  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2739  a);
2740  pkt->pts = track->audio.buf_timecode;
2742  pkt->pos = pos;
2743  pkt->stream_index = st->index;
2744  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2745  }
2746 
2747  return 0;
2748 }
2749 
2750 /* reconstruct full wavpack blocks from mangled matroska ones */
2752  uint8_t **pdst, int *size)
2753 {
2754  uint8_t *dst = NULL;
2755  int dstlen = 0;
2756  int srclen = *size;
2757  uint32_t samples;
2758  uint16_t ver;
2759  int ret, offset = 0;
2760 
2761  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2762  return AVERROR_INVALIDDATA;
2763 
2764  ver = AV_RL16(track->stream->codecpar->extradata);
2765 
2766  samples = AV_RL32(src);
2767  src += 4;
2768  srclen -= 4;
2769 
2770  while (srclen >= 8) {
2771  int multiblock;
2772  uint32_t blocksize;
2773  uint8_t *tmp;
2774 
2775  uint32_t flags = AV_RL32(src);
2776  uint32_t crc = AV_RL32(src + 4);
2777  src += 8;
2778  srclen -= 8;
2779 
2780  multiblock = (flags & 0x1800) != 0x1800;
2781  if (multiblock) {
2782  if (srclen < 4) {
2783  ret = AVERROR_INVALIDDATA;
2784  goto fail;
2785  }
2786  blocksize = AV_RL32(src);
2787  src += 4;
2788  srclen -= 4;
2789  } else
2790  blocksize = srclen;
2791 
2792  if (blocksize > srclen) {
2793  ret = AVERROR_INVALIDDATA;
2794  goto fail;
2795  }
2796 
2797  tmp = av_realloc(dst, dstlen + blocksize + 32);
2798  if (!tmp) {
2799  ret = AVERROR(ENOMEM);
2800  goto fail;
2801  }
2802  dst = tmp;
2803  dstlen += blocksize + 32;
2804 
2805  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2806  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2807  AV_WL16(dst + offset + 8, ver); // version
2808  AV_WL16(dst + offset + 10, 0); // track/index_no
2809  AV_WL32(dst + offset + 12, 0); // total samples
2810  AV_WL32(dst + offset + 16, 0); // block index
2811  AV_WL32(dst + offset + 20, samples); // number of samples
2812  AV_WL32(dst + offset + 24, flags); // flags
2813  AV_WL32(dst + offset + 28, crc); // crc
2814  memcpy(dst + offset + 32, src, blocksize); // block data
2815 
2816  src += blocksize;
2817  srclen -= blocksize;
2818  offset += blocksize + 32;
2819  }
2820 
2821  *pdst = dst;
2822  *size = dstlen;
2823 
2824  return 0;
2825 
2826 fail:
2827  av_freep(&dst);
2828  return ret;
2829 }
2830 
2832  MatroskaTrack *track,
2833  AVStream *st,
2834  uint8_t *data, int data_len,
2835  uint64_t timecode,
2836  uint64_t duration,
2837  int64_t pos)
2838 {
2839  AVPacket *pkt;
2840  uint8_t *id, *settings, *text, *buf;
2841  int id_len, settings_len, text_len;
2842  uint8_t *p, *q;
2843  int err;
2844 
2845  if (data_len <= 0)
2846  return AVERROR_INVALIDDATA;
2847 
2848  p = data;
2849  q = data + data_len;
2850 
2851  id = p;
2852  id_len = -1;
2853  while (p < q) {
2854  if (*p == '\r' || *p == '\n') {
2855  id_len = p - id;
2856  if (*p == '\r')
2857  p++;
2858  break;
2859  }
2860  p++;
2861  }
2862 
2863  if (p >= q || *p != '\n')
2864  return AVERROR_INVALIDDATA;
2865  p++;
2866 
2867  settings = p;
2868  settings_len = -1;
2869  while (p < q) {
2870  if (*p == '\r' || *p == '\n') {
2871  settings_len = p - settings;
2872  if (*p == '\r')
2873  p++;
2874  break;
2875  }
2876  p++;
2877  }
2878 
2879  if (p >= q || *p != '\n')
2880  return AVERROR_INVALIDDATA;
2881  p++;
2882 
2883  text = p;
2884  text_len = q - p;
2885  while (text_len > 0) {
2886  const int len = text_len - 1;
2887  const uint8_t c = p[len];
2888  if (c != '\r' && c != '\n')
2889  break;
2890  text_len = len;
2891  }
2892 
2893  if (text_len <= 0)
2894  return AVERROR_INVALIDDATA;
2895 
2896  pkt = av_mallocz(sizeof(*pkt));
2897  if (!pkt)
2898  return AVERROR(ENOMEM);
2899  err = av_new_packet(pkt, text_len);
2900  if (err < 0) {
2901  av_free(pkt);
2902  return AVERROR(err);
2903  }
2904 
2905  memcpy(pkt->data, text, text_len);
2906 
2907  if (id_len > 0) {
2908  buf = av_packet_new_side_data(pkt,
2910  id_len);
2911  if (!buf) {
2912  av_free(pkt);
2913  return AVERROR(ENOMEM);
2914  }
2915  memcpy(buf, id, id_len);
2916  }
2917 
2918  if (settings_len > 0) {
2919  buf = av_packet_new_side_data(pkt,
2921  settings_len);
2922  if (!buf) {
2923  av_free(pkt);
2924  return AVERROR(ENOMEM);
2925  }
2926  memcpy(buf, settings, settings_len);
2927  }
2928 
2929  // Do we need this for subtitles?
2930  // pkt->flags = AV_PKT_FLAG_KEY;
2931 
2932  pkt->stream_index = st->index;
2933  pkt->pts = timecode;
2934 
2935  // Do we need this for subtitles?
2936  // pkt->dts = timecode;
2937 
2938  pkt->duration = duration;
2939  pkt->pos = pos;
2940 
2941  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2942  matroska->prev_pkt = pkt;
2943 
2944  return 0;
2945 }
2946 
2948  MatroskaTrack *track, AVStream *st,
2949  uint8_t *data, int pkt_size,
2950  uint64_t timecode, uint64_t lace_duration,
2951  int64_t pos, int is_keyframe,
2952  uint8_t *additional, uint64_t additional_id, int additional_size,
2953  int64_t discard_padding)
2954 {
2955  MatroskaTrackEncoding *encodings = track->encodings.elem;
2956  uint8_t *pkt_data = data;
2957  int offset = 0, res;
2958  AVPacket *pkt;
2959 
2960  if (encodings && !encodings->type && encodings->scope & 1) {
2961  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2962  if (res < 0)
2963  return res;
2964  }
2965 
2966  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
2967  uint8_t *wv_data;
2968  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2969  if (res < 0) {
2970  av_log(matroska->ctx, AV_LOG_ERROR,
2971  "Error parsing a wavpack block.\n");
2972  goto fail;
2973  }
2974  if (pkt_data != data)
2975  av_freep(&pkt_data);
2976  pkt_data = wv_data;
2977  }
2978 
2979  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
2980  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
2981  offset = 8;
2982 
2983  pkt = av_mallocz(sizeof(AVPacket));
2984  if (!pkt) {
2985  if (pkt_data != data)
2986  av_freep(&pkt_data);
2987  return AVERROR(ENOMEM);
2988  }
2989  /* XXX: prevent data copy... */
2990  if (av_new_packet(pkt, pkt_size + offset) < 0) {
2991  av_free(pkt);
2992  res = AVERROR(ENOMEM);
2993  goto fail;
2994  }
2995 
2996  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
2997  uint8_t *buf = pkt->data;
2998  bytestream_put_be32(&buf, pkt_size);
2999  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3000  }
3001 
3002  memcpy(pkt->data + offset, pkt_data, pkt_size);
3003 
3004  if (pkt_data != data)
3005  av_freep(&pkt_data);
3006 
3007  pkt->flags = is_keyframe;
3008  pkt->stream_index = st->index;
3009 
3010  if (additional_size > 0) {
3011  uint8_t *side_data = av_packet_new_side_data(pkt,
3013  additional_size + 8);
3014  if (!side_data) {
3015  av_packet_unref(pkt);
3016  av_free(pkt);
3017  return AVERROR(ENOMEM);
3018  }
3019  AV_WB64(side_data, additional_id);
3020  memcpy(side_data + 8, additional, additional_size);
3021  }
3022 
3023  if (discard_padding) {
3024  uint8_t *side_data = av_packet_new_side_data(pkt,
3026  10);
3027  if (!side_data) {
3028  av_packet_unref(pkt);
3029  av_free(pkt);
3030  return AVERROR(ENOMEM);
3031  }
3032  AV_WL32(side_data, 0);
3033  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
3034  (AVRational){1, 1000000000},
3035  (AVRational){1, st->codecpar->sample_rate}));
3036  }
3037 
3038  if (track->ms_compat)
3039  pkt->dts = timecode;
3040  else
3041  pkt->pts = timecode;
3042  pkt->pos = pos;
3043  pkt->duration = lace_duration;
3044 
3045 #if FF_API_CONVERGENCE_DURATION
3047  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3048  pkt->convergence_duration = lace_duration;
3049  }
3051 #endif
3052 
3053  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3054  matroska->prev_pkt = pkt;
3055 
3056  return 0;
3057 
3058 fail:
3059  if (pkt_data != data)
3060  av_freep(&pkt_data);
3061  return res;
3062 }
3063 
3065  int size, int64_t pos, uint64_t cluster_time,
3066  uint64_t block_duration, int is_keyframe,
3067  uint8_t *additional, uint64_t additional_id, int additional_size,
3068  int64_t cluster_pos, int64_t discard_padding)
3069 {
3070  uint64_t timecode = AV_NOPTS_VALUE;
3071  MatroskaTrack *track;
3072  int res = 0;
3073  AVStream *st;
3074  int16_t block_time;
3075  uint32_t *lace_size = NULL;
3076  int n, flags, laces = 0;
3077  uint64_t num;
3078  int trust_default_duration = 1;
3079 
3080  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3081  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3082  return n;
3083  }
3084  data += n;
3085  size -= n;
3086 
3087  track = matroska_find_track_by_num(matroska, num);
3088  if (!track || !track->stream) {
3089  av_log(matroska->ctx, AV_LOG_INFO,
3090  "Invalid stream %"PRIu64" or size %u\n", num, size);
3091  return AVERROR_INVALIDDATA;
3092  } else if (size <= 3)
3093  return 0;
3094  st = track->stream;
3095  if (st->discard >= AVDISCARD_ALL)
3096  return res;
3097  av_assert1(block_duration != AV_NOPTS_VALUE);
3098 
3099  block_time = sign_extend(AV_RB16(data), 16);
3100  data += 2;
3101  flags = *data++;
3102  size -= 3;
3103  if (is_keyframe == -1)
3104  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3105 
3106  if (cluster_time != (uint64_t) -1 &&
3107  (block_time >= 0 || cluster_time >= -block_time)) {
3108  timecode = cluster_time + block_time - track->codec_delay;
3109  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3110  timecode < track->end_timecode)
3111  is_keyframe = 0; /* overlapping subtitles are not key frame */
3112  if (is_keyframe)
3113  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3115  }
3116 
3117  if (matroska->skip_to_keyframe &&
3118  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3119  if (timecode < matroska->skip_to_timecode)
3120  return res;
3121  if (is_keyframe)
3122  matroska->skip_to_keyframe = 0;
3123  else if (!st->skip_to_keyframe) {
3124  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3125  matroska->skip_to_keyframe = 0;
3126  }
3127  }
3128 
3129  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3130  &lace_size, &laces);
3131 
3132  if (res)
3133  goto end;
3134 
3135  if (track->audio.samplerate == 8000) {
3136  // If this is needed for more codecs, then add them here
3137  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3138  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3139  trust_default_duration = 0;
3140  }
3141  }
3142 
3143  if (!block_duration && trust_default_duration)
3144  block_duration = track->default_duration * laces / matroska->time_scale;
3145 
3146  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3147  track->end_timecode =
3148  FFMAX(track->end_timecode, timecode + block_duration);
3149 
3150  for (n = 0; n < laces; n++) {
3151  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3152 
3153  if (lace_size[n] > size) {
3154  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3155  break;
3156  }
3157 
3158  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3162  st->codecpar->block_align && track->audio.sub_packet_size) {
3163  res = matroska_parse_rm_audio(matroska, track, st, data,
3164  lace_size[n],
3165  timecode, pos);
3166  if (res)
3167  goto end;
3168 
3169  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3170  res = matroska_parse_webvtt(matroska, track, st,
3171  data, lace_size[n],
3172  timecode, lace_duration,
3173  pos);
3174  if (res)
3175  goto end;
3176  } else {
3177  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3178  timecode, lace_duration, pos,
3179  !n ? is_keyframe : 0,
3180  additional, additional_id, additional_size,
3181  discard_padding);
3182  if (res)
3183  goto end;
3184  }
3185 
3186  if (timecode != AV_NOPTS_VALUE)
3187  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3188  data += lace_size[n];
3189  size -= lace_size[n];
3190  }
3191 
3192 end:
3193  av_free(lace_size);
3194  return res;
3195 }
3196 
3198 {
3199  EbmlList *blocks_list;
3200  MatroskaBlock *blocks;
3201  int i, res;
3202  res = ebml_parse(matroska,
3203  matroska_cluster_incremental_parsing,
3204  &matroska->current_cluster);
3205  if (res == 1) {
3206  /* New Cluster */
3207  if (matroska->current_cluster_pos)
3208  ebml_level_end(matroska);
3209  ebml_free(matroska_cluster, &matroska->current_cluster);
3210  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3211  matroska->current_cluster_num_blocks = 0;
3212  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3213  matroska->prev_pkt = NULL;
3214  /* sizeof the ID which was already read */
3215  if (matroska->current_id)
3216  matroska->current_cluster_pos -= 4;
3217  res = ebml_parse(matroska,
3218  matroska_clusters_incremental,
3219  &matroska->current_cluster);
3220  /* Try parsing the block again. */
3221  if (res == 1)
3222  res = ebml_parse(matroska,
3223  matroska_cluster_incremental_parsing,
3224  &matroska->current_cluster);
3225  }
3226 
3227  if (!res &&
3228  matroska->current_cluster_num_blocks <
3229  matroska->current_cluster.blocks.nb_elem) {
3230  blocks_list = &matroska->current_cluster.blocks;
3231  blocks = blocks_list->elem;
3232 
3233  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3234  i = blocks_list->nb_elem - 1;
3235  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3236  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3237  uint8_t* additional = blocks[i].additional.size > 0 ?
3238  blocks[i].additional.data : NULL;
3239  if (!blocks[i].non_simple)
3240  blocks[i].duration = 0;
3241  res = matroska_parse_block(matroska, blocks[i].bin.data,
3242  blocks[i].bin.size, blocks[i].bin.pos,
3243  matroska->current_cluster.timecode,
3244  blocks[i].duration, is_keyframe,
3245  additional, blocks[i].additional_id,
3246  blocks[i].additional.size,
3247  matroska->current_cluster_pos,
3248  blocks[i].discard_padding);
3249  }
3250  }
3251 
3252  return res;
3253 }
3254 
3256 {
3257  MatroskaCluster cluster = { 0 };
3258  EbmlList *blocks_list;
3259  MatroskaBlock *blocks;
3260  int i, res;
3261  int64_t pos;
3262 
3263  if (!matroska->contains_ssa)
3264  return matroska_parse_cluster_incremental(matroska);
3265  pos = avio_tell(matroska->ctx->pb);
3266  matroska->prev_pkt = NULL;
3267  if (matroska->current_id)
3268  pos -= 4; /* sizeof the ID which was already read */
3269  res = ebml_parse(matroska, matroska_clusters, &cluster);
3270  blocks_list = &cluster.blocks;
3271  blocks = blocks_list->elem;
3272  for (i = 0; i < blocks_list->nb_elem; i++)
3273  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3274  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3275  res = matroska_parse_block(matroska, blocks[i].bin.data,
3276  blocks[i].bin.size, blocks[i].bin.pos,
3277  cluster.timecode, blocks[i].duration,
3278  is_keyframe, NULL, 0, 0, pos,
3279  blocks[i].discard_padding);
3280  }
3281  ebml_free(matroska_cluster, &cluster);
3282  return res;
3283 }
3284 
3286 {
3287  MatroskaDemuxContext *matroska = s->priv_data;
3288 
3289  while (matroska_deliver_packet(matroska, pkt)) {
3290  int64_t pos = avio_tell(matroska->ctx->pb);
3291  if (matroska->done)
3292  return AVERROR_EOF;
3293  if (matroska_parse_cluster(matroska) < 0)
3294  matroska_resync(matroska, pos);
3295  }
3296 
3297  return 0;
3298 }
3299 
3300 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3301  int64_t timestamp, int flags)
3302 {
3303  MatroskaDemuxContext *matroska = s->priv_data;
3304  MatroskaTrack *tracks = NULL;
3305  AVStream *st = s->streams[stream_index];
3306  int i, index, index_sub, index_min;
3307 
3308  /* Parse the CUES now since we need the index data to seek. */
3309  if (matroska->cues_parsing_deferred > 0) {
3310  matroska->cues_parsing_deferred = 0;
3311  matroska_parse_cues(matroska);
3312  }
3313 
3314  if (!st->nb_index_entries)
3315  goto err;
3316  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3317 
3318  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3319  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3320  SEEK_SET);
3321  matroska->current_id = 0;
3322  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3323  matroska_clear_queue(matroska);
3324  if (matroska_parse_cluster(matroska) < 0)
3325  break;
3326  }
3327  }
3328 
3329  matroska_clear_queue(matroska);
3330  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3331  goto err;
3332 
3333  index_min = index;
3334  tracks = matroska->tracks.elem;
3335  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3336  tracks[i].audio.pkt_cnt = 0;
3337  tracks[i].audio.sub_packet_cnt = 0;
3338  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3339  tracks[i].end_timecode = 0;
3340  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3341  tracks[i].stream &&
3342  tracks[i].stream->discard != AVDISCARD_ALL) {
3343  index_sub = av_index_search_timestamp(
3344  tracks[i].stream, st->index_entries[index].timestamp,
3346  while (index_sub >= 0 &&
3347  index_min > 0 &&
3348  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3349  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3350  index_min--;
3351  }
3352  }
3353 
3354  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3355  matroska->current_id = 0;
3356  if (flags & AVSEEK_FLAG_ANY) {
3357  st->skip_to_keyframe = 0;
3358  matroska->skip_to_timecode = timestamp;
3359  } else {
3360  st->skip_to_keyframe = 1;
3361  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3362  }
3363  matroska->skip_to_keyframe = 1;
3364  matroska->done = 0;
3365  matroska->num_levels = 0;
3366  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3367  return 0;
3368 err:
3369  // slightly hackish but allows proper fallback to
3370  // the generic seeking code.
3371  matroska_clear_queue(matroska);
3372  matroska->current_id = 0;
3373  st->skip_to_keyframe =
3374  matroska->skip_to_keyframe = 0;
3375  matroska->done = 0;
3376  matroska->num_levels = 0;
3377  return -1;
3378 }
3379 
3381 {
3382  MatroskaDemuxContext *matroska = s->priv_data;
3383  MatroskaTrack *tracks = matroska->tracks.elem;
3384  int n;
3385 
3386  matroska_clear_queue(matroska);
3387 
3388  for (n = 0; n < matroska->tracks.nb_elem; n++)
3389  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3390  av_freep(&tracks[n].audio.buf);
3391  ebml_free(matroska_cluster, &matroska->current_cluster);
3392  ebml_free(matroska_segment, matroska);
3393 
3394  return 0;
3395 }
3396 
3397 typedef struct {
3398  int64_t start_time_ns;
3399  int64_t end_time_ns;
3400  int64_t start_offset;
3401  int64_t end_offset;
3402 } CueDesc;
3403 
3404 /* This function searches all the Cues and returns the CueDesc corresponding the
3405  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3406  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3407  */
3408 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3409  MatroskaDemuxContext *matroska = s->priv_data;
3410  CueDesc cue_desc;
3411  int i;
3412  int nb_index_entries = s->streams[0]->nb_index_entries;
3413  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3414  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3415  for (i = 1; i < nb_index_entries; i++) {
3416  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3417  index_entries[i].timestamp * matroska->time_scale > ts) {
3418  break;
3419  }
3420  }
3421  --i;
3422  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3423  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3424  if (i != nb_index_entries - 1) {
3425  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3426  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3427  } else {
3428  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3429  // FIXME: this needs special handling for files where Cues appear
3430  // before Clusters. the current logic assumes Cues appear after
3431  // Clusters.
3432  cue_desc.end_offset = cues_start - matroska->segment_start;
3433  }
3434  return cue_desc;
3435 }
3436 
3438 {
3439  MatroskaDemuxContext *matroska = s->priv_data;
3440  int64_t cluster_pos, before_pos;
3441  int index, rv = 1;
3442  if (s->streams[0]->nb_index_entries <= 0) return 0;
3443  // seek to the first cluster using cues.
3444  index = av_index_search_timestamp(s->streams[0], 0, 0);
3445  if (index < 0) return 0;
3446  cluster_pos = s->streams[0]->index_entries[index].pos;
3447  before_pos = avio_tell(s->pb);
3448  while (1) {
3449  int64_t cluster_id = 0, cluster_length = 0;
3450  AVPacket *pkt;
3451  avio_seek(s->pb, cluster_pos, SEEK_SET);
3452  // read cluster id and length
3453  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3454  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3455  if (cluster_id != 0xF43B675) { // done with all clusters
3456  break;
3457  }
3458  avio_seek(s->pb, cluster_pos, SEEK_SET);
3459  matroska->current_id = 0;
3460  matroska_clear_queue(matroska);
3461  if (matroska_parse_cluster(matroska) < 0 ||
3462  matroska->num_packets <= 0) {
3463  break;
3464  }
3465  pkt = matroska->packets[0];
3466  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3467  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3468  rv = 0;
3469  break;
3470  }
3471  }
3472  avio_seek(s->pb, before_pos, SEEK_SET);
3473  return rv;
3474 }
3475 
3476 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3477  double min_buffer, double* buffer,
3478  double* sec_to_download, AVFormatContext *s,
3479  int64_t cues_start)
3480 {
3481  double nano_seconds_per_second = 1000000000.0;
3482  double time_sec = time_ns / nano_seconds_per_second;
3483  int rv = 0;
3484  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3485  int64_t end_time_ns = time_ns + time_to_search_ns;
3486  double sec_downloaded = 0.0;
3487  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3488  if (desc_curr.start_time_ns == -1)
3489  return -1;
3490  *sec_to_download = 0.0;
3491 
3492  // Check for non cue start time.
3493  if (time_ns > desc_curr.start_time_ns) {
3494  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3495  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3496  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3497  double timeToDownload = (cueBytes * 8.0) / bps;
3498 
3499  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3500  *sec_to_download += timeToDownload;
3501 
3502  // Check if the search ends within the first cue.
3503  if (desc_curr.end_time_ns >= end_time_ns) {
3504  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3505  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3506  sec_downloaded = percent_to_sub * sec_downloaded;
3507  *sec_to_download = percent_to_sub * *sec_to_download;
3508  }
3509 
3510  if ((sec_downloaded + *buffer) <= min_buffer) {
3511  return 1;
3512  }
3513 
3514  // Get the next Cue.
3515  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3516  }
3517 
3518  while (desc_curr.start_time_ns != -1) {
3519  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3520  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3521  double desc_sec = desc_ns / nano_seconds_per_second;
3522  double bits = (desc_bytes * 8.0);
3523  double time_to_download = bits / bps;
3524 
3525  sec_downloaded += desc_sec - time_to_download;
3526  *sec_to_download += time_to_download;
3527 
3528  if (desc_curr.end_time_ns >= end_time_ns) {
3529  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3530  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3531  sec_downloaded = percent_to_sub * sec_downloaded;
3532  *sec_to_download = percent_to_sub * *sec_to_download;
3533 
3534  if ((sec_downloaded + *buffer) <= min_buffer)
3535  rv = 1;
3536  break;
3537  }
3538 
3539  if ((sec_downloaded + *buffer) <= min_buffer) {
3540  rv = 1;
3541  break;
3542  }
3543 
3544  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3545  }
3546  *buffer = *buffer + sec_downloaded;
3547  return rv;
3548 }
3549 
3550 /* This function computes the bandwidth of the WebM file with the help of
3551  * buffer_size_after_time_downloaded() function. Both of these functions are
3552  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3553  * Matroska parsing mechanism.
3554  *
3555  * Returns the bandwidth of the file on success; -1 on error.
3556  * */
3557 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3558 {
3559  MatroskaDemuxContext *matroska = s->priv_data;
3560  AVStream *st = s->streams[0];
3561  double bandwidth = 0.0;
3562  int i;
3563 
3564  for (i = 0; i < st->nb_index_entries; i++) {
3565  int64_t prebuffer_ns = 1000000000;
3566  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3567  double nano_seconds_per_second = 1000000000.0;
3568  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3569  double prebuffer_bytes = 0.0;
3570  int64_t temp_prebuffer_ns = prebuffer_ns;
3571  int64_t pre_bytes, pre_ns;
3572  double pre_sec, prebuffer, bits_per_second;
3573  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3574 
3575  // Start with the first Cue.
3576  CueDesc desc_end = desc_beg;
3577 
3578  // Figure out how much data we have downloaded for the prebuffer. This will
3579  // be used later to adjust the bits per sample to try.
3580  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3581  // Prebuffered the entire Cue.
3582  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3583  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3584  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3585  }
3586  if (desc_end.start_time_ns == -1) {
3587  // The prebuffer is larger than the duration.
3588  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3589  return -1;
3590  bits_per_second = 0.0;
3591  } else {
3592  // The prebuffer ends in the last Cue. Estimate how much data was
3593  // prebuffered.
3594  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3595  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3596  pre_sec = pre_ns / nano_seconds_per_second;
3597  prebuffer_bytes +=
3598  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3599 
3600  prebuffer = prebuffer_ns / nano_seconds_per_second;
3601 
3602  // Set this to 0.0 in case our prebuffer buffers the entire video.
3603  bits_per_second = 0.0;
3604  do {
3605  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3606  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3607  double desc_sec = desc_ns / nano_seconds_per_second;
3608  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3609 
3610  // Drop the bps by the percentage of bytes buffered.
3611  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3612  double mod_bits_per_second = calc_bits_per_second * percent;
3613 
3614  if (prebuffer < desc_sec) {
3615  double search_sec =
3616  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3617 
3618  // Add 1 so the bits per second should be a little bit greater than file
3619  // datarate.
3620  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3621  const double min_buffer = 0.0;
3622  double buffer = prebuffer;
3623  double sec_to_download = 0.0;
3624 
3625  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3626  min_buffer, &buffer, &sec_to_download,
3627  s, cues_start);
3628  if (rv < 0) {
3629  return -1;
3630  } else if (rv == 0) {
3631  bits_per_second = (double)(bps);
3632  break;
3633  }
3634  }
3635 
3636  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3637  } while (desc_end.start_time_ns != -1);
3638  }
3639  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3640  }
3641  return (int64_t)bandwidth;
3642 }
3643 
3645 {
3646  MatroskaDemuxContext *matroska = s->priv_data;
3647  EbmlList *seekhead_list = &matroska->seekhead;
3648  MatroskaSeekhead *seekhead = seekhead_list->elem;
3649  char *buf;
3650  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3651  int i;
3652 
3653  // determine cues start and end positions
3654  for (i = 0; i < seekhead_list->nb_elem; i++)
3655  if (seekhead[i].id == MATROSKA_ID_CUES)
3656  break;
3657 
3658  if (i >= seekhead_list->nb_elem) return -1;
3659 
3660  before_pos = avio_tell(matroska->ctx->pb);
3661  cues_start = seekhead[i].pos + matroska->segment_start;
3662  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3663  // cues_end is computed as cues_start + cues_length + length of the
3664  // Cues element ID + EBML length of the Cues element. cues_end is
3665  // inclusive and the above sum is reduced by 1.
3666  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3667  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3668  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3669  cues_end = cues_start + cues_length + bytes_read - 1;
3670  }
3671  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3672  if (cues_start == -1 || cues_end == -1) return -1;
3673 
3674  // parse the cues
3675  matroska_parse_cues(matroska);
3676 
3677  // cues start
3678  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3679 
3680  // cues end
3681  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3682 
3683  // bandwidth
3684  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3685  if (bandwidth < 0) return -1;
3686  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3687 
3688  // check if all clusters start with key frames
3690 
3691  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3692  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3693  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3694  if (!buf) return -1;
3695  strcpy(buf, "");
3696  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3697  snprintf(buf, (i + 1) * 20 * sizeof(char),
3698  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3699  if (i != s->streams[0]->nb_index_entries - 1)
3700  strncat(buf, ",", sizeof(char));
3701  }
3702  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3703  av_free(buf);
3704 
3705  return 0;
3706 }
3707 
3709 {
3710  char *buf;
3711  int ret = matroska_read_header(s);
3712  MatroskaTrack *tracks;
3713  MatroskaDemuxContext *matroska = s->priv_data;
3714  if (ret) {
3715  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3716  return -1;
3717  }
3718 
3719  if (!matroska->is_live) {
3720  buf = av_asprintf("%g", matroska->duration);
3721  if (!buf) return AVERROR(ENOMEM);
3722  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3723  av_free(buf);
3724 
3725  // initialization range
3726  // 5 is the offset of Cluster ID.
3728  }
3729 
3730  // basename of the file
3731  buf = strrchr(s->filename, '/');
3732  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3733 
3734  // track number
3735  tracks = matroska->tracks.elem;
3736  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3737 
3738  // parse the cues and populate Cue related fields
3739  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3740 }
3741 
3743 {
3744  return AVERROR_EOF;
3745 }
3746 
3747 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3748 static const AVOption options[] = {
3749  { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3750  { NULL },
3751 };
3752 
3753 static const AVClass webm_dash_class = {
3754  .class_name = "WebM DASH Manifest demuxer",
3755  .item_name = av_default_item_name,
3756  .option = options,
3757  .version = LIBAVUTIL_VERSION_INT,
3758 };
3759 
3761  .name = "matroska,webm",
3762  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3763  .extensions = "mkv,mk3d,mka,mks",
3764  .priv_data_size = sizeof(MatroskaDemuxContext),
3770  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3771 };
3772 
3774  .name = "webm_dash_manifest",
3775  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3776  .priv_data_size = sizeof(MatroskaDemuxContext),
3780  .priv_class = &webm_dash_class,
3781 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
MatroskaTrackVideoColor color
Definition: matroskadec.c:173
const char * s
Definition: matroskadec.c:93
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2360
#define AV_DISPOSITION_METADATA
Definition: avformat.h:860
#define NULL
Definition: coverity.c:32
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:222
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:429
static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int size, uint64_t timecode, int64_t pos)
Definition: matroskadec.c:2674
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:3999
#define MATROSKA_ID_VIDEOFLAGINTERLACED
Definition: matroska.h:121
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define MATROSKA_ID_VIDEOCOLOR_GX
Definition: matroska.h:146
static const EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:668
uint64_t seek_preroll
Definition: matroskadec.c:214
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:145
static const EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:599
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1469
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1486
uint64_t type
Definition: matroskadec.c:205
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:527
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3742
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2510
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:110
AVOption.
Definition: opt.h:245
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3760
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:50
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:1897
enum AVCodecID id
Definition: mxfenc.c:104
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:380
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:184
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2941
#define MATROSKA_ID_CODECPRIVATE
Definition: matroska.h:89
const unsigned char ff_sipr_subpk_size[4]
Definition: rmsipr.c:25
#define MATROSKA_ID_TAGTARGETS_TYPE
Definition: matroska.h:202
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:765
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
#define INITIALIZATION_RANGE
Definition: matroska.h:318
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1594
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:986
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3437
else temp
Definition: vf_mcdeint.c:259
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:609
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4399
int64_t pos
Definition: avformat.h:816
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:165
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:159
uint64_t chapteruid
Definition: matroskadec.c:270
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:423
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2362
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
Definition: intfloat.h:40
#define MATROSKA_ID_TRACKFLAGDEFAULT
Definition: matroska.h:99
uint64_t additional_id
Definition: matroskadec.c:359
EbmlList tag
Definition: matroskadec.c:276
uint64_t uid
Definition: matroskadec.c:204
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:345
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t lace_duration, int64_t pos, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t discard_padding)
Definition: matroskadec.c:2947
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3911
AVRational white_point[2]
CIE 1931 xy chromaticity coords of white point.
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:206
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:877
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:217
const char * b
Definition: vf_curves.c:109
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:238
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1085
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:229
uint64_t flag_forced
Definition: matroskadec.c:213
int av_log2(unsigned v)
Definition: intmath.c:26
uint64_t max_size
Definition: matroskadec.c:111
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:205
uint64_t flag_default
Definition: matroskadec.c:212
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:144
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:120
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:124
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:476
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:160
char * name
Definition: matroskadec.c:259
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:287
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
Definition: utils.c:3092
int version
Definition: avisynth_c.h:629
discard all
Definition: avcodec.h:778
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:306
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:188
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:152
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:688
MatroskaTrackAudio audio
Definition: matroskadec.c:216
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ
Definition: matroska.h:134
uint64_t duration
Definition: matroskadec.c:355
static AVRational av_make_q(int num, int den)
Create a rational.
Definition: rational.h:53
const struct EbmlSyntax * n
Definition: matroskadec.c:94
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:252
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define MATROSKA_ID_CLUSTERTIMECODE
Definition: matroska.h:216
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1601
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:172
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:245
enum AVColorSpace color_space
Definition: avcodec.h:4000
static const EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:481
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
int frame_size
Audio only.
Definition: avcodec.h:4032
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1512
#define AV_LZO_OUTPUT_FULL
decoded data did not fit into output buffer
Definition: lzo.h:39
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4161
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:235
Format I/O context.
Definition: avformat.h:1319
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:262
UID uid
Definition: mxfenc.c:1820
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1811
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
union EbmlSyntax::@177 def
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:680
#define MATROSKA_ID_CODECDOWNLOADURL
Definition: matroska.h:92
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define AV_WB64(p, v)
Definition: intreadwrite.h:433
int64_t end_timecode
Definition: matroskadec.c:222
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3708
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:866
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1432
Public dictionary API.
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:197
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:574
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1082
uint64_t pixel_height
Definition: matroskadec.c:169
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:329
uint8_t bits
Definition: crc.c:296
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
#define MATROSKA_ID_VIDEOCOLOR_BX
Definition: matroska.h:148
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:248
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:171
MatroskaTrackOperation operation
Definition: matroskadec.c:217
MatroskaTrackVideo video
Definition: matroskadec.c:215
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:253
int width
Video only.
Definition: avcodec.h:3977
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3408
static const AVProfile aac_profiles[]
void * elem
Definition: matroskadec.c:100
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:130
uint8_t * data
Definition: matroskadec.c:105
static int webm_dash_manifest_cues(AVFormatContext *s)
Definition: matroskadec.c:3644
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:71
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:703
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
uint64_t time
Definition: matroskadec.c:254
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:151
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1592
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
static const EbmlSyntax matroska_track_video_color[]
Definition: matroskadec.c:405
#define TRACK_NUMBER
Definition: matroska.h:326
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1676
enum AVStreamParseType need_parsing
Definition: avformat.h:1074
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:133
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:224
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:203
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:251
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:640
AVStream * stream
Definition: matroskadec.c:236
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4037
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:209
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:221
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:189
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:157
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:126
int initial_padding
Audio only.
Definition: avcodec.h:4040
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:652
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1430
uint8_t * data
Definition: avcodec.h:1574
uint64_t typevalue
Definition: matroskadec.c:268
uint64_t codec_delay
Definition: matroskadec.c:219
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3197
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:129
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:250
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:220
uint32_t tag
Definition: movenc.c:1353
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:594
int64_t start_time_ns
Definition: matroskadec.c:3398
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define MATROSKA_ID_CODECDECODEALL
Definition: matroska.h:93
#define MATROSKA_ID_ENCODINGENCRYPTION
Definition: matroska.h:170
enum AVCodecID id
Definition: internal.h:51
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define MATROSKA_ID_CUES
Definition: matroska.h:58
#define EBML_MAX_DEPTH
Definition: matroska.h:306
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:1776
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:770
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:447
int has_luminance
Flag indicating whether the luminance (min_ and max_) have been set.
static const uint8_t header[24]
Definition: sdr2.c:67
#define MATROSKA_ID_TRACKNUMBER
Definition: matroska.h:78
#define MATROSKA_ID_VIDEOCOLOR_WHITEY
Definition: matroska.h:151
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:187
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4013
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:550
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:88
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:858
EbmlList sub
Definition: matroskadec.c:263
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1534
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3940
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2860
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1606
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3255
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1038
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:191
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
uint64_t display_height
Definition: matroskadec.c:167
#define U(x)
Definition: vp56_arith.h:37
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:163
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:122
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:823
#define FILENAME
Definition: matroska.h:321
EbmlType type
Definition: matroskadec.c:87
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
#define MATROSKA_ID_VIDEOCOLOR_BY
Definition: matroska.h:149
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1533
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:228
int64_t end_offset
Definition: matroskadec.c:3401
#define EBML_ID_EBMLREADVERSION
Definition: matroska.h:37
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:1996
#define MATROSKA_ID_VIDEOCOLORMAXCLL
Definition: matroska.h:140
MatroskaMasteringMeta mastering_meta
Definition: matroskadec.c:161
#define MATROSKA_ID_VIDEOCOLOR_WHITEX
Definition: matroska.h:150
static const uint16_t mask[17]
Definition: lzw.c:38
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb, uint64_t *number)
Read a EBML length value.
Definition: matroskadec.c:834
av_default_item_name
AVChapter * chapter
Definition: matroskadec.c:245
#define AVERROR(e)
Definition: error.h:43
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:817
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
Definition: matroska.h:135
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVColorPrimaries color_primaries
Definition: avcodec.h:3998
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:237
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:467
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:975
const char * r
Definition: vf_curves.c:107
uint64_t display_width
Definition: matroskadec.c:166
#define MATROSKA_ID_WRITINGAPP
Definition: matroska.h:69
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t block_duration, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t cluster_pos, int64_t discard_padding)
Definition: matroskadec.c:3064
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:360
const char *const ff_matroska_video_stereo_mode[MATROSKA_VIDEO_STEREOMODE_TYPE_NB]
Definition: matroska.c:127
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:510
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3907
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:200
enum AVCodecID id
Definition: matroska.h:302
#define MATROSKA_ID_VIDEOPIXELCROPR
Definition: matroska.h:119
#define MATROSKA_ID_TRACKPLANEUID
Definition: matroska.h:86
GLsizei GLsizei * length
Definition: opengl_enc.c:115
static av_always_inline av_const double round(double x)
Definition: libm.h:444
#define MATROSKA_ID_ENCODINGCOMPSETTINGS
Definition: matroska.h:168
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:255
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:588
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:553
enum AVCodecID codec_id
Definition: mov_chan.c:433
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:138
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
uint64_t timecode
Definition: matroskadec.c:290
#define FFMAX(a, b)
Definition: common.h:94
AVRational max_luminance
Max luminance of mastering display (cd/m^2).
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:81
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1580
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3929
Only parse headers, do not repack.
Definition: avformat.h:807
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:541
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1209
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:99
#define MATROSKA_ID_TAG
Definition: matroska.h:194
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:462
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
char * lang
Definition: matroskadec.c:261
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:629
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:841
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:175
static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_NB]
uint64_t skip_to_timecode
Definition: matroskadec.c:334
Definition: dct-test.c:51
int block_align
Audio only.
Definition: avcodec.h:4028
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2355
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1646
static const EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:391
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:207
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1579
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
Definition: matroska.h:153
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:166
uint64_t start
Definition: matroskadec.c:240
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3099
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1395
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes to a null-terminated string.
Definition: base64.h:66
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:246
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:689
#define FFMIN(a, b)
Definition: common.h:96
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:201
#define MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
Definition: matroska.h:129
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
AVPacket ** packets
Definition: matroskadec.c:326
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:308
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:196
AVRational min_luminance
Min luminance of mastering display (cd/m^2).
#define MATROSKA_ID_TRACKTIMECODESCALE
Definition: matroska.h:107
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1117
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:788
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:487
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:256
uint64_t id_length
Definition: matroskadec.c:112
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1284
#define CLUSTER_KEYFRAME
Definition: matroska.h:324
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:195
uint64_t doctype_version
Definition: matroskadec.c:114
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int64_t duration
Definition: movenc-test.c:63
#define MATROSKA_ID_TRACKMAXCACHE
Definition: matroska.h:103
#define DURATION
Definition: matroska.h:323
int data_offset
Definition: matroskadec.c:89
#define MATROSKA_ID_CHAPTERPHYSEQUIV
Definition: matroska.h:257
static int matroska_read_close(AVFormatContext *s)
Definition: matroskadec.c:3380
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
EbmlBin codec_priv
Definition: matroskadec.c:208
static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
Definition: matroskadec.c:908
static const EbmlSyntax ebml_syntax[]
Definition: matroskadec.c:375
static int matroska_decode_buffer(uint8_t **buf, int *buf_size, MatroskaTrack *track)
Definition: matroskadec.c:1298
#define MATROSKA_ID_CHAPTERATOM
Definition: matroska.h:243
#define OFFSET(x)
Definition: matroskadec.c:3747
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
Definition: lzo.c:134
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2937
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:945
uint8_t * av_stream_new_side_data(AVStream *stream, enum AVPacketSideDataType type, int size)
Allocate new information from stream.
Definition: utils.c:4926
static const EbmlSyntax matroska_chapter[]
Definition: matroskadec.c:565
enum AVColorRange color_range
Video only.
Definition: avcodec.h:3997
Opaque data information usually sparse.
Definition: avutil.h:197
#define MATROSKA_ID_VIDEOCOLORSPACE
Definition: matroska.h:125
#define MATROSKA_ID_CHAPTERS
Definition: matroska.h:63
static int matroska_probe(AVProbeData *p)
Definition: matroskadec.c:1242
#define EBML_ID_VOID
Definition: matroska.h:45
#define src
Definition: vp9dsp.c:530
static void mkv_stereo_mode_display_mul(int stereo_mode, int *h_width, int *h_height)
Definition: matroskadec.c:1752