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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 interlaced;
172  uint64_t field_order;
173  uint64_t stereo_mode;
174  uint64_t alpha_mode;
177 
178 typedef struct MatroskaTrackAudio {
179  double samplerate;
181  uint64_t bitdepth;
182  uint64_t channels;
183 
184  /* real audio header (extracted from extradata) */
190  int pkt_cnt;
191  uint64_t buf_timecode;
194 
195 typedef struct MatroskaTrackPlane {
196  uint64_t uid;
197  uint64_t type;
199 
200 typedef struct MatroskaTrackOperation {
203 
204 typedef struct MatroskaTrack {
205  uint64_t num;
206  uint64_t uid;
207  uint64_t type;
208  char *name;
209  char *codec_id;
211  char *language;
212  double time_scale;
214  uint64_t flag_default;
215  uint64_t flag_forced;
216  uint64_t seek_preroll;
221  uint64_t codec_delay;
223 
225  int64_t end_timecode;
228 
231 } MatroskaTrack;
232 
233 typedef struct MatroskaAttachment {
234  uint64_t uid;
235  char *filename;
236  char *mime;
238 
241 
242 typedef struct MatroskaChapter {
243  uint64_t start;
244  uint64_t end;
245  uint64_t uid;
246  char *title;
247 
250 
251 typedef struct MatroskaIndexPos {
252  uint64_t track;
253  uint64_t pos;
255 
256 typedef struct MatroskaIndex {
257  uint64_t time;
259 } MatroskaIndex;
260 
261 typedef struct MatroskaTag {
262  char *name;
263  char *string;
264  char *lang;
265  uint64_t def;
267 } MatroskaTag;
268 
269 typedef struct MatroskaTagTarget {
270  char *type;
271  uint64_t typevalue;
272  uint64_t trackuid;
273  uint64_t chapteruid;
274  uint64_t attachuid;
276 
277 typedef struct MatroskaTags {
280 } MatroskaTags;
281 
282 typedef struct MatroskaSeekhead {
283  uint64_t id;
284  uint64_t pos;
286 
287 typedef struct MatroskaLevel {
288  uint64_t start;
289  uint64_t length;
290 } MatroskaLevel;
291 
292 typedef struct MatroskaCluster {
293  uint64_t timecode;
296 
297 typedef struct MatroskaLevel1Element {
298  uint64_t id;
299  uint64_t pos;
300  int parsed;
302 
303 typedef struct MatroskaDemuxContext {
304  const AVClass *class;
306 
307  /* EBML stuff */
310  int level_up;
311  uint32_t current_id;
312 
313  uint64_t time_scale;
314  double duration;
315  char *title;
316  char *muxingapp;
324 
325  /* byte position of the segment inside the stream */
326  int64_t segment_start;
327 
328  /* the packet queue */
332 
333  int done;
334 
335  /* What to skip before effectively reading a packet. */
338 
339  /* File has a CUES element, but we defer parsing until it is needed. */
341 
342  /* Level1 elements and whether they were read yet */
345 
349 
350  /* File has SSA subtitles which prevent incremental cluster parsing. */
352 
353  /* WebM DASH Manifest live flag/ */
354  int is_live;
356 
357 typedef struct MatroskaBlock {
358  uint64_t duration;
359  int64_t reference;
360  uint64_t non_simple;
362  uint64_t additional_id;
365 } MatroskaBlock;
366 
367 static const EbmlSyntax ebml_header[] = {
368  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
369  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
370  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
371  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
372  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
375  { 0 }
376 };
377 
378 static const EbmlSyntax ebml_syntax[] = {
379  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
380  { 0 }
381 };
382 
383 static const EbmlSyntax matroska_info[] = {
384  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
386  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
388  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
389  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
391  { 0 }
392 };
393 
395  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
396  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
397  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
398  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
399  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
400  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
401  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
402  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
403  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
404  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
405  { 0 }
406 };
407 
409  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u=2 } },
410  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=8 } },
411  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
412  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
413  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
414  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
415  { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u=0 } },
416  { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u=0 } },
417  { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u=0 } },
419  { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u=2 } },
420  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
421  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
422  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
423  { 0 }
424 };
425 
427  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
428  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
429  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
430  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
431  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
432  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
433  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
434  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
444  { 0 }
445 };
446 
448  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
449  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
450  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
451  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
452  { 0 }
453 };
454 
458  { 0 }
459 };
460 
469  { 0 }
470 };
472  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
473  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
474  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
475  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
477  { 0 }
478 };
479 
481  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
482  { 0 }
483 };
484 
488  { 0 }
489 };
490 
492  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
493  { 0 }
494 };
495 
497  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
498  { 0 }
499 };
500 
501 static const EbmlSyntax matroska_track[] = {
502  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
504  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
507  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
508  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
509  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
510  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
511  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
512  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
513  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
514  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
515  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
516  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
517  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
518  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
519  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
528  { 0 }
529 };
530 
531 static const EbmlSyntax matroska_tracks[] = {
532  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
533  { 0 }
534 };
535 
536 static const EbmlSyntax matroska_attachment[] = {
538  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
539  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
540  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
542  { 0 }
543 };
544 
546  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
547  { 0 }
548 };
549 
551  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
554  { 0 }
555 };
556 
561  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
566  { 0 }
567 };
568 
569 static const EbmlSyntax matroska_chapter[] = {
570  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
575  { 0 }
576 };
577 
578 static const EbmlSyntax matroska_chapters[] = {
579  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
580  { 0 }
581 };
582 
583 static const EbmlSyntax matroska_index_pos[] = {
584  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
589  { 0 }
590 };
591 
593  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
594  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
595  { 0 }
596 };
597 
598 static const EbmlSyntax matroska_index[] = {
599  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
600  { 0 }
601 };
602 
603 static const EbmlSyntax matroska_simpletag[] = {
604  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
605  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
606  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
607  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
608  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
609  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
610  { 0 }
611 };
612 
613 static const EbmlSyntax matroska_tagtargets[] = {
615  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
616  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
617  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
618  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
619  { 0 }
620 };
621 
622 static const EbmlSyntax matroska_tag[] = {
623  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
624  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
625  { 0 }
626 };
627 
628 static const EbmlSyntax matroska_tags[] = {
629  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
630  { 0 }
631 };
632 
634  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
635  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
636  { 0 }
637 };
638 
639 static const EbmlSyntax matroska_seekhead[] = {
640  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
641  { 0 }
642 };
643 
644 static const EbmlSyntax matroska_segment[] = {
645  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
646  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
647  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
648  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
649  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
650  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
651  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
653  { 0 }
654 };
655 
656 static const EbmlSyntax matroska_segments[] = {
657  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
658  { 0 }
659 };
660 
661 static const EbmlSyntax matroska_blockmore[] = {
662  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
663  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
664  { 0 }
665 };
666 
668  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
669  { 0 }
670 };
671 
672 static const EbmlSyntax matroska_blockgroup[] = {
673  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
674  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
675  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
677  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
678  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
680  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
681  { 0 }
682 };
683 
684 static const EbmlSyntax matroska_cluster[] = {
685  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
686  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
687  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
690  { 0 }
691 };
692 
693 static const EbmlSyntax matroska_clusters[] = {
694  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
699  { 0 }
700 };
701 
703  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
704  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
705  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
713  { 0 }
714 };
715 
717  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
722  { 0 }
723 };
724 
726  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
731  { 0 }
732 };
733 
734 static const char *const matroska_doctypes[] = { "matroska", "webm" };
735 
737 
738 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
739 {
740  AVIOContext *pb = matroska->ctx->pb;
741  uint32_t id;
742  matroska->current_id = 0;
743  matroska->num_levels = 0;
744 
745  /* seek to next position to resync from */
746  if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
747  goto eof;
748 
749  id = avio_rb32(pb);
750 
751  // try to find a toplevel element
752  while (!avio_feof(pb)) {
753  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
754  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
756  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
757  matroska->current_id = id;
758  return 0;
759  }
760  id = (id << 8) | avio_r8(pb);
761  }
762 
763 eof:
764  matroska->done = 1;
765  return AVERROR_EOF;
766 }
767 
768 /*
769  * Return: Whether we reached the end of a level in the hierarchy or not.
770  */
772 {
773  AVIOContext *pb = matroska->ctx->pb;
774  int64_t pos = avio_tell(pb);
775 
776  if (matroska->num_levels > 0) {
777  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
778  if (pos - level->start >= level->length || matroska->current_id) {
779  matroska->num_levels--;
780  return 1;
781  }
782  }
783  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
784 }
785 
786 /*
787  * Read: an "EBML number", which is defined as a variable-length
788  * array of bytes. The first byte indicates the length by giving a
789  * number of 0-bits followed by a one. The position of the first
790  * "one" bit inside the first byte indicates the length of this
791  * number.
792  * Returns: number of bytes read, < 0 on error
793  */
795  int max_size, uint64_t *number)
796 {
797  int read = 1, n = 1;
798  uint64_t total = 0;
799 
800  /* The first byte tells us the length in bytes - avio_r8() can normally
801  * return 0, but since that's not a valid first ebmlID byte, we can
802  * use it safely here to catch EOS. */
803  if (!(total = avio_r8(pb))) {
804  /* we might encounter EOS here */
805  if (!avio_feof(pb)) {
806  int64_t pos = avio_tell(pb);
807  av_log(matroska->ctx, AV_LOG_ERROR,
808  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
809  pos, pos);
810  return pb->error ? pb->error : AVERROR(EIO);
811  }
812  return AVERROR_EOF;
813  }
814 
815  /* get the length of the EBML number */
816  read = 8 - ff_log2_tab[total];
817  if (read > max_size) {
818  int64_t pos = avio_tell(pb) - 1;
819  av_log(matroska->ctx, AV_LOG_ERROR,
820  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
821  (uint8_t) total, pos, pos);
822  return AVERROR_INVALIDDATA;
823  }
824 
825  /* read out length */
826  total ^= 1 << ff_log2_tab[total];
827  while (n++ < read)
828  total = (total << 8) | avio_r8(pb);
829 
830  *number = total;
831 
832  return read;
833 }
834 
835 /**
836  * Read a EBML length value.
837  * This needs special handling for the "unknown length" case which has multiple
838  * encodings.
839  */
841  uint64_t *number)
842 {
843  int res = ebml_read_num(matroska, pb, 8, number);
844  if (res > 0 && *number + 1 == 1ULL << (7 * res))
845  *number = 0xffffffffffffffULL;
846  return res;
847 }
848 
849 /*
850  * Read the next element as an unsigned int.
851  * 0 is success, < 0 is failure.
852  */
853 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
854 {
855  int n = 0;
856 
857  if (size > 8)
858  return AVERROR_INVALIDDATA;
859 
860  /* big-endian ordering; build up number */
861  *num = 0;
862  while (n++ < size)
863  *num = (*num << 8) | avio_r8(pb);
864 
865  return 0;
866 }
867 
868 /*
869  * Read the next element as a signed int.
870  * 0 is success, < 0 is failure.
871  */
872 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
873 {
874  int n = 1;
875 
876  if (size > 8)
877  return AVERROR_INVALIDDATA;
878 
879  if (size == 0) {
880  *num = 0;
881  } else {
882  *num = sign_extend(avio_r8(pb), 8);
883 
884  /* big-endian ordering; build up number */
885  while (n++ < size)
886  *num = ((uint64_t)*num << 8) | avio_r8(pb);
887  }
888 
889  return 0;
890 }
891 
892 /*
893  * Read the next element as a float.
894  * 0 is success, < 0 is failure.
895  */
896 static int ebml_read_float(AVIOContext *pb, int size, double *num)
897 {
898  if (size == 0)
899  *num = 0;
900  else if (size == 4)
901  *num = av_int2float(avio_rb32(pb));
902  else if (size == 8)
903  *num = av_int2double(avio_rb64(pb));
904  else
905  return AVERROR_INVALIDDATA;
906 
907  return 0;
908 }
909 
910 /*
911  * Read the next element as an ASCII string.
912  * 0 is success, < 0 is failure.
913  */
914 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
915 {
916  char *res;
917 
918  /* EBML strings are usually not 0-terminated, so we allocate one
919  * byte more, read the string and NULL-terminate it ourselves. */
920  if (!(res = av_malloc(size + 1)))
921  return AVERROR(ENOMEM);
922  if (avio_read(pb, (uint8_t *) res, size) != size) {
923  av_free(res);
924  return AVERROR(EIO);
925  }
926  (res)[size] = '\0';
927  av_free(*str);
928  *str = res;
929 
930  return 0;
931 }
932 
933 /*
934  * Read the next element as binary data.
935  * 0 is success, < 0 is failure.
936  */
937 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
938 {
939  av_fast_padded_malloc(&bin->data, &bin->size, length);
940  if (!bin->data)
941  return AVERROR(ENOMEM);
942 
943  bin->size = length;
944  bin->pos = avio_tell(pb);
945  if (avio_read(pb, bin->data, length) != length) {
946  av_freep(&bin->data);
947  bin->size = 0;
948  return AVERROR(EIO);
949  }
950 
951  return 0;
952 }
953 
954 /*
955  * Read the next element, but only the header. The contents
956  * are supposed to be sub-elements which can be read separately.
957  * 0 is success, < 0 is failure.
958  */
959 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
960 {
961  AVIOContext *pb = matroska->ctx->pb;
963 
964  if (matroska->num_levels >= EBML_MAX_DEPTH) {
965  av_log(matroska->ctx, AV_LOG_ERROR,
966  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
967  return AVERROR(ENOSYS);
968  }
969 
970  level = &matroska->levels[matroska->num_levels++];
971  level->start = avio_tell(pb);
972  level->length = length;
973 
974  return 0;
975 }
976 
977 /*
978  * Read signed/unsigned "EBML" numbers.
979  * Return: number of bytes processed, < 0 on error
980  */
982  uint8_t *data, uint32_t size, uint64_t *num)
983 {
984  AVIOContext pb;
985  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
986  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
987 }
988 
989 /*
990  * Same as above, but signed.
991  */
993  uint8_t *data, uint32_t size, int64_t *num)
994 {
995  uint64_t unum;
996  int res;
997 
998  /* read as unsigned number first */
999  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1000  return res;
1001 
1002  /* make signed (weird way) */
1003  *num = unum - ((1LL << (7 * res - 1)) - 1);
1004 
1005  return res;
1006 }
1007 
1008 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1009  EbmlSyntax *syntax, void *data);
1010 
1011 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1012  uint32_t id, void *data)
1013 {
1014  int i;
1015  for (i = 0; syntax[i].id; i++)
1016  if (id == syntax[i].id)
1017  break;
1018  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1019  matroska->num_levels > 0 &&
1020  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1021  return 0; // we reached the end of an unknown size cluster
1022  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1023  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1024  }
1025  return ebml_parse_elem(matroska, &syntax[i], data);
1026 }
1027 
1028 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1029  void *data)
1030 {
1031  if (!matroska->current_id) {
1032  uint64_t id;
1033  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1034  if (res < 0) {
1035  // in live mode, finish parsing if EOF is reached.
1036  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1037  res == AVERROR_EOF) ? 1 : res;
1038  }
1039  matroska->current_id = id | 1 << 7 * res;
1040  }
1041  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1042 }
1043 
1044 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1045  void *data)
1046 {
1047  int i, res = 0;
1048 
1049  for (i = 0; syntax[i].id; i++)
1050  switch (syntax[i].type) {
1051  case EBML_UINT:
1052  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1053  break;
1054  case EBML_FLOAT:
1055  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1056  break;
1057  case EBML_STR:
1058  case EBML_UTF8:
1059  // the default may be NULL
1060  if (syntax[i].def.s) {
1061  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1062  *dst = av_strdup(syntax[i].def.s);
1063  if (!*dst)
1064  return AVERROR(ENOMEM);
1065  }
1066  break;
1067  }
1068 
1069  while (!res && !ebml_level_end(matroska))
1070  res = ebml_parse(matroska, syntax, data);
1071 
1072  return res;
1073 }
1074 
1075 static int is_ebml_id_valid(uint32_t id)
1076 {
1077  // Due to endian nonsense in Matroska, the highest byte with any bits set
1078  // will contain the leading length bit. This bit in turn identifies the
1079  // total byte length of the element by its position within the byte.
1080  unsigned int bits = av_log2(id);
1081  return id && (bits + 7) / 8 == (8 - bits % 8);
1082 }
1083 
1084 /*
1085  * Allocate and return the entry for the level1 element with the given ID. If
1086  * an entry already exists, return the existing entry.
1087  */
1089  uint32_t id)
1090 {
1091  int i;
1092  MatroskaLevel1Element *elem;
1093 
1094  if (!is_ebml_id_valid(id))
1095  return NULL;
1096 
1097  // Some files link to all clusters; useless.
1098  if (id == MATROSKA_ID_CLUSTER)
1099  return NULL;
1100 
1101  // There can be multiple seekheads.
1102  if (id != MATROSKA_ID_SEEKHEAD) {
1103  for (i = 0; i < matroska->num_level1_elems; i++) {
1104  if (matroska->level1_elems[i].id == id)
1105  return &matroska->level1_elems[i];
1106  }
1107  }
1108 
1109  // Only a completely broken file would have more elements.
1110  // It also provides a low-effort way to escape from circular seekheads
1111  // (every iteration will add a level1 entry).
1112  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1113  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1114  return NULL;
1115  }
1116 
1117  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1118  *elem = (MatroskaLevel1Element){.id = id};
1119 
1120  return elem;
1121 }
1122 
1124  EbmlSyntax *syntax, void *data)
1125 {
1126  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1127  [EBML_UINT] = 8,
1128  [EBML_FLOAT] = 8,
1129  // max. 16 MB for strings
1130  [EBML_STR] = 0x1000000,
1131  [EBML_UTF8] = 0x1000000,
1132  // max. 256 MB for binary data
1133  [EBML_BIN] = 0x10000000,
1134  // no limits for anything else
1135  };
1136  AVIOContext *pb = matroska->ctx->pb;
1137  uint32_t id = syntax->id;
1138  uint64_t length;
1139  int res;
1140  void *newelem;
1141  MatroskaLevel1Element *level1_elem;
1142 
1143  data = (char *) data + syntax->data_offset;
1144  if (syntax->list_elem_size) {
1145  EbmlList *list = data;
1146  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1147  if (!newelem)
1148  return AVERROR(ENOMEM);
1149  list->elem = newelem;
1150  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1151  memset(data, 0, syntax->list_elem_size);
1152  list->nb_elem++;
1153  }
1154 
1155  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1156  matroska->current_id = 0;
1157  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1158  return res;
1159  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1160  av_log(matroska->ctx, AV_LOG_ERROR,
1161  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1162  length, max_lengths[syntax->type], syntax->type);
1163  return AVERROR_INVALIDDATA;
1164  }
1165  }
1166 
1167  switch (syntax->type) {
1168  case EBML_UINT:
1169  res = ebml_read_uint(pb, length, data);
1170  break;
1171  case EBML_SINT:
1172  res = ebml_read_sint(pb, length, data);
1173  break;
1174  case EBML_FLOAT:
1175  res = ebml_read_float(pb, length, data);
1176  break;
1177  case EBML_STR:
1178  case EBML_UTF8:
1179  res = ebml_read_ascii(pb, length, data);
1180  break;
1181  case EBML_BIN:
1182  res = ebml_read_binary(pb, length, data);
1183  break;
1184  case EBML_LEVEL1:
1185  case EBML_NEST:
1186  if ((res = ebml_read_master(matroska, length)) < 0)
1187  return res;
1188  if (id == MATROSKA_ID_SEGMENT)
1189  matroska->segment_start = avio_tell(matroska->ctx->pb);
1190  if (id == MATROSKA_ID_CUES)
1191  matroska->cues_parsing_deferred = 0;
1192  if (syntax->type == EBML_LEVEL1 &&
1193  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1194  if (level1_elem->parsed)
1195  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1196  level1_elem->parsed = 1;
1197  }
1198  return ebml_parse_nest(matroska, syntax->def.n, data);
1199  case EBML_PASS:
1200  return ebml_parse_id(matroska, syntax->def.n, id, data);
1201  case EBML_STOP:
1202  return 1;
1203  default:
1204  if (ffio_limit(pb, length) != length)
1205  return AVERROR(EIO);
1206  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1207  }
1208  if (res == AVERROR_INVALIDDATA)
1209  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1210  else if (res == AVERROR(EIO))
1211  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1212  return res;
1213 }
1214 
1215 static void ebml_free(EbmlSyntax *syntax, void *data)
1216 {
1217  int i, j;
1218  for (i = 0; syntax[i].id; i++) {
1219  void *data_off = (char *) data + syntax[i].data_offset;
1220  switch (syntax[i].type) {
1221  case EBML_STR:
1222  case EBML_UTF8:
1223  av_freep(data_off);
1224  break;
1225  case EBML_BIN:
1226  av_freep(&((EbmlBin *) data_off)->data);
1227  break;
1228  case EBML_LEVEL1:
1229  case EBML_NEST:
1230  if (syntax[i].list_elem_size) {
1231  EbmlList *list = data_off;
1232  char *ptr = list->elem;
1233  for (j = 0; j < list->nb_elem;
1234  j++, ptr += syntax[i].list_elem_size)
1235  ebml_free(syntax[i].def.n, ptr);
1236  av_freep(&list->elem);
1237  } else
1238  ebml_free(syntax[i].def.n, data_off);
1239  default:
1240  break;
1241  }
1242  }
1243 }
1244 
1245 /*
1246  * Autodetecting...
1247  */
1249 {
1250  uint64_t total = 0;
1251  int len_mask = 0x80, size = 1, n = 1, i;
1252 
1253  /* EBML header? */
1254  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1255  return 0;
1256 
1257  /* length of header */
1258  total = p->buf[4];
1259  while (size <= 8 && !(total & len_mask)) {
1260  size++;
1261  len_mask >>= 1;
1262  }
1263  if (size > 8)
1264  return 0;
1265  total &= (len_mask - 1);
1266  while (n < size)
1267  total = (total << 8) | p->buf[4 + n++];
1268 
1269  /* Does the probe data contain the whole header? */
1270  if (p->buf_size < 4 + size + total)
1271  return 0;
1272 
1273  /* The header should contain a known document type. For now,
1274  * we don't parse the whole header but simply check for the
1275  * availability of that array of characters inside the header.
1276  * Not fully fool-proof, but good enough. */
1277  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1278  size_t probelen = strlen(matroska_doctypes[i]);
1279  if (total < probelen)
1280  continue;
1281  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1282  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1283  return AVPROBE_SCORE_MAX;
1284  }
1285 
1286  // probably valid EBML header but no recognized doctype
1287  return AVPROBE_SCORE_EXTENSION;
1288 }
1289 
1291  int num)
1292 {
1293  MatroskaTrack *tracks = matroska->tracks.elem;
1294  int i;
1295 
1296  for (i = 0; i < matroska->tracks.nb_elem; i++)
1297  if (tracks[i].num == num)
1298  return &tracks[i];
1299 
1300  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1301  return NULL;
1302 }
1303 
1304 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1305  MatroskaTrack *track)
1306 {
1307  MatroskaTrackEncoding *encodings = track->encodings.elem;
1308  uint8_t *data = *buf;
1309  int isize = *buf_size;
1310  uint8_t *pkt_data = NULL;
1311  uint8_t av_unused *newpktdata;
1312  int pkt_size = isize;
1313  int result = 0;
1314  int olen;
1315 
1316  if (pkt_size >= 10000000U)
1317  return AVERROR_INVALIDDATA;
1318 
1319  switch (encodings[0].compression.algo) {
1321  {
1322  int header_size = encodings[0].compression.settings.size;
1323  uint8_t *header = encodings[0].compression.settings.data;
1324 
1325  if (header_size && !header) {
1326  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1327  return -1;
1328  }
1329 
1330  if (!header_size)
1331  return 0;
1332 
1333  pkt_size = isize + header_size;
1334  pkt_data = av_malloc(pkt_size);
1335  if (!pkt_data)
1336  return AVERROR(ENOMEM);
1337 
1338  memcpy(pkt_data, header, header_size);
1339  memcpy(pkt_data + header_size, data, isize);
1340  break;
1341  }
1342 #if CONFIG_LZO
1344  do {
1345  olen = pkt_size *= 3;
1346  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1347  if (!newpktdata) {
1348  result = AVERROR(ENOMEM);
1349  goto failed;
1350  }
1351  pkt_data = newpktdata;
1352  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1353  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1354  if (result) {
1355  result = AVERROR_INVALIDDATA;
1356  goto failed;
1357  }
1358  pkt_size -= olen;
1359  break;
1360 #endif
1361 #if CONFIG_ZLIB
1363  {
1364  z_stream zstream = { 0 };
1365  if (inflateInit(&zstream) != Z_OK)
1366  return -1;
1367  zstream.next_in = data;
1368  zstream.avail_in = isize;
1369  do {
1370  pkt_size *= 3;
1371  newpktdata = av_realloc(pkt_data, pkt_size);
1372  if (!newpktdata) {
1373  inflateEnd(&zstream);
1374  result = AVERROR(ENOMEM);
1375  goto failed;
1376  }
1377  pkt_data = newpktdata;
1378  zstream.avail_out = pkt_size - zstream.total_out;
1379  zstream.next_out = pkt_data + zstream.total_out;
1380  result = inflate(&zstream, Z_NO_FLUSH);
1381  } while (result == Z_OK && pkt_size < 10000000);
1382  pkt_size = zstream.total_out;
1383  inflateEnd(&zstream);
1384  if (result != Z_STREAM_END) {
1385  if (result == Z_MEM_ERROR)
1386  result = AVERROR(ENOMEM);
1387  else
1388  result = AVERROR_INVALIDDATA;
1389  goto failed;
1390  }
1391  break;
1392  }
1393 #endif
1394 #if CONFIG_BZLIB
1396  {
1397  bz_stream bzstream = { 0 };
1398  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1399  return -1;
1400  bzstream.next_in = data;
1401  bzstream.avail_in = isize;
1402  do {
1403  pkt_size *= 3;
1404  newpktdata = av_realloc(pkt_data, pkt_size);
1405  if (!newpktdata) {
1406  BZ2_bzDecompressEnd(&bzstream);
1407  result = AVERROR(ENOMEM);
1408  goto failed;
1409  }
1410  pkt_data = newpktdata;
1411  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1412  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1413  result = BZ2_bzDecompress(&bzstream);
1414  } while (result == BZ_OK && pkt_size < 10000000);
1415  pkt_size = bzstream.total_out_lo32;
1416  BZ2_bzDecompressEnd(&bzstream);
1417  if (result != BZ_STREAM_END) {
1418  if (result == BZ_MEM_ERROR)
1419  result = AVERROR(ENOMEM);
1420  else
1421  result = AVERROR_INVALIDDATA;
1422  goto failed;
1423  }
1424  break;
1425  }
1426 #endif
1427  default:
1428  return AVERROR_INVALIDDATA;
1429  }
1430 
1431  *buf = pkt_data;
1432  *buf_size = pkt_size;
1433  return 0;
1434 
1435 failed:
1436  av_free(pkt_data);
1437  return result;
1438 }
1439 
1441  AVDictionary **metadata, char *prefix)
1442 {
1443  MatroskaTag *tags = list->elem;
1444  char key[1024];
1445  int i;
1446 
1447  for (i = 0; i < list->nb_elem; i++) {
1448  const char *lang = tags[i].lang &&
1449  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1450 
1451  if (!tags[i].name) {
1452  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1453  continue;
1454  }
1455  if (prefix)
1456  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1457  else
1458  av_strlcpy(key, tags[i].name, sizeof(key));
1459  if (tags[i].def || !lang) {
1460  av_dict_set(metadata, key, tags[i].string, 0);
1461  if (tags[i].sub.nb_elem)
1462  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1463  }
1464  if (lang) {
1465  av_strlcat(key, "-", sizeof(key));
1466  av_strlcat(key, lang, sizeof(key));
1467  av_dict_set(metadata, key, tags[i].string, 0);
1468  if (tags[i].sub.nb_elem)
1469  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1470  }
1471  }
1473 }
1474 
1476 {
1477  MatroskaDemuxContext *matroska = s->priv_data;
1478  MatroskaTags *tags = matroska->tags.elem;
1479  int i, j;
1480 
1481  for (i = 0; i < matroska->tags.nb_elem; i++) {
1482  if (tags[i].target.attachuid) {
1483  MatroskaAttachment *attachment = matroska->attachments.elem;
1484  int found = 0;
1485  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1486  if (attachment[j].uid == tags[i].target.attachuid &&
1487  attachment[j].stream) {
1488  matroska_convert_tag(s, &tags[i].tag,
1489  &attachment[j].stream->metadata, NULL);
1490  found = 1;
1491  }
1492  }
1493  if (!found) {
1495  "The tags at index %d refer to a "
1496  "non-existent attachment %"PRId64".\n",
1497  i, tags[i].target.attachuid);
1498  }
1499  } else if (tags[i].target.chapteruid) {
1500  MatroskaChapter *chapter = matroska->chapters.elem;
1501  int found = 0;
1502  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1503  if (chapter[j].uid == tags[i].target.chapteruid &&
1504  chapter[j].chapter) {
1505  matroska_convert_tag(s, &tags[i].tag,
1506  &chapter[j].chapter->metadata, NULL);
1507  found = 1;
1508  }
1509  }
1510  if (!found) {
1512  "The tags at index %d refer to a non-existent chapter "
1513  "%"PRId64".\n",
1514  i, tags[i].target.chapteruid);
1515  }
1516  } else if (tags[i].target.trackuid) {
1517  MatroskaTrack *track = matroska->tracks.elem;
1518  int found = 0;
1519  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1520  if (track[j].uid == tags[i].target.trackuid &&
1521  track[j].stream) {
1522  matroska_convert_tag(s, &tags[i].tag,
1523  &track[j].stream->metadata, NULL);
1524  found = 1;
1525  }
1526  }
1527  if (!found) {
1529  "The tags at index %d refer to a non-existent track "
1530  "%"PRId64".\n",
1531  i, tags[i].target.trackuid);
1532  }
1533  } else {
1534  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1535  tags[i].target.type);
1536  }
1537  }
1538 }
1539 
1541  uint64_t pos)
1542 {
1543  uint32_t level_up = matroska->level_up;
1544  uint32_t saved_id = matroska->current_id;
1545  int64_t before_pos = avio_tell(matroska->ctx->pb);
1547  int64_t offset;
1548  int ret = 0;
1549 
1550  /* seek */
1551  offset = pos + matroska->segment_start;
1552  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1553  /* We don't want to lose our seekhead level, so we add
1554  * a dummy. This is a crude hack. */
1555  if (matroska->num_levels == EBML_MAX_DEPTH) {
1556  av_log(matroska->ctx, AV_LOG_INFO,
1557  "Max EBML element depth (%d) reached, "
1558  "cannot parse further.\n", EBML_MAX_DEPTH);
1559  ret = AVERROR_INVALIDDATA;
1560  } else {
1561  level.start = 0;
1562  level.length = (uint64_t) -1;
1563  matroska->levels[matroska->num_levels] = level;
1564  matroska->num_levels++;
1565  matroska->current_id = 0;
1566 
1567  ret = ebml_parse(matroska, matroska_segment, matroska);
1568 
1569  /* remove dummy level */
1570  while (matroska->num_levels) {
1571  uint64_t length = matroska->levels[--matroska->num_levels].length;
1572  if (length == (uint64_t) -1)
1573  break;
1574  }
1575  }
1576  }
1577  /* seek back */
1578  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1579  matroska->level_up = level_up;
1580  matroska->current_id = saved_id;
1581 
1582  return ret;
1583 }
1584 
1586 {
1587  EbmlList *seekhead_list = &matroska->seekhead;
1588  int i;
1589 
1590  // we should not do any seeking in the streaming case
1591  if (!matroska->ctx->pb->seekable)
1592  return;
1593 
1594  for (i = 0; i < seekhead_list->nb_elem; i++) {
1595  MatroskaSeekhead *seekheads = seekhead_list->elem;
1596  uint32_t id = seekheads[i].id;
1597  uint64_t pos = seekheads[i].pos;
1598 
1599  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1600  if (!elem || elem->parsed)
1601  continue;
1602 
1603  elem->pos = pos;
1604 
1605  // defer cues parsing until we actually need cue data.
1606  if (id == MATROSKA_ID_CUES)
1607  continue;
1608 
1609  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1610  // mark index as broken
1611  matroska->cues_parsing_deferred = -1;
1612  break;
1613  }
1614 
1615  elem->parsed = 1;
1616  }
1617 }
1618 
1620 {
1621  EbmlList *index_list;
1623  uint64_t index_scale = 1;
1624  int i, j;
1625 
1626  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1627  return;
1628 
1629  index_list = &matroska->index;
1630  index = index_list->elem;
1631  if (index_list->nb_elem < 2)
1632  return;
1633  if (index[1].time > 1E14 / matroska->time_scale) {
1634  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1635  return;
1636  }
1637  for (i = 0; i < index_list->nb_elem; i++) {
1638  EbmlList *pos_list = &index[i].pos;
1639  MatroskaIndexPos *pos = pos_list->elem;
1640  for (j = 0; j < pos_list->nb_elem; j++) {
1641  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1642  pos[j].track);
1643  if (track && track->stream)
1644  av_add_index_entry(track->stream,
1645  pos[j].pos + matroska->segment_start,
1646  index[i].time / index_scale, 0, 0,
1648  }
1649  }
1650 }
1651 
1653  int i;
1654 
1655  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1656  return;
1657 
1658  for (i = 0; i < matroska->num_level1_elems; i++) {
1659  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1660  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1661  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1662  matroska->cues_parsing_deferred = -1;
1663  elem->parsed = 1;
1664  break;
1665  }
1666  }
1667 
1668  matroska_add_index_entries(matroska);
1669 }
1670 
1672 {
1673  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1674  int profile;
1675 
1676  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1677  if (strstr(codec_id, aac_profiles[profile]))
1678  break;
1679  return profile + 1;
1680 }
1681 
1682 static int matroska_aac_sri(int samplerate)
1683 {
1684  int sri;
1685 
1686  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1687  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1688  break;
1689  return sri;
1690 }
1691 
1692 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1693 {
1694  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1695  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1696 }
1697 
1699  MatroskaTrack *track,
1700  int *offset)
1701 {
1702  AVStream *st = track->stream;
1703  uint8_t *p = track->codec_priv.data;
1704  int size = track->codec_priv.size;
1705 
1706  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1707  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1708  track->codec_priv.size = 0;
1709  return 0;
1710  }
1711  *offset = 8;
1712  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1713 
1714  p += track->codec_priv.size;
1715  size -= track->codec_priv.size;
1716 
1717  /* parse the remaining metadata blocks if present */
1718  while (size >= 4) {
1719  int block_last, block_type, block_size;
1720 
1721  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1722 
1723  p += 4;
1724  size -= 4;
1725  if (block_size > size)
1726  return 0;
1727 
1728  /* check for the channel mask */
1729  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1730  AVDictionary *dict = NULL;
1731  AVDictionaryEntry *chmask;
1732 
1733  ff_vorbis_comment(s, &dict, p, block_size, 0);
1734  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1735  if (chmask) {
1736  uint64_t mask = strtol(chmask->value, NULL, 0);
1737  if (!mask || mask & ~0x3ffffULL) {
1739  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1740  } else
1741  st->codecpar->channel_layout = mask;
1742  }
1743  av_dict_free(&dict);
1744  }
1745 
1746  p += block_size;
1747  size -= block_size;
1748  }
1749 
1750  return 0;
1751 }
1752 
1753 static int mkv_field_order(int64_t field_order)
1754 {
1755  switch (field_order) {
1757  return AV_FIELD_PROGRESSIVE;
1759  return AV_FIELD_UNKNOWN;
1761  return AV_FIELD_TT;
1763  return AV_FIELD_BB;
1765  return AV_FIELD_BT;
1767  return AV_FIELD_TB;
1768  default:
1769  return AV_FIELD_UNKNOWN;
1770  }
1771 }
1772 
1773 static void mkv_stereo_mode_display_mul(int stereo_mode,
1774  int *h_width, int *h_height)
1775 {
1776  switch (stereo_mode) {
1782  break;
1787  *h_width = 2;
1788  break;
1793  *h_height = 2;
1794  break;
1795  }
1796 }
1797 
1798 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1799  const MatroskaMasteringMeta* mastering_meta =
1800  &track->video.color.mastering_meta;
1801  // Mastering primaries are CIE 1931 coords, and must be > 0.
1802  const int has_mastering_primaries =
1803  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1804  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1805  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1806  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1807  const int has_mastering_luminance = mastering_meta->max_luminance > 0;
1808 
1811  if (track->video.color.primaries != AVCOL_PRI_RESERVED)
1815  if (track->video.color.range != AVCOL_RANGE_UNSPECIFIED &&
1816  track->video.color.range <= AVCOL_RANGE_JPEG)
1817  st->codecpar->color_range = track->video.color.range;
1818 
1819  if (has_mastering_primaries || has_mastering_luminance) {
1820  // Use similar rationals as other standards.
1821  const int chroma_den = 50000;
1822  const int luma_den = 10000;
1823  AVMasteringDisplayMetadata *metadata =
1826  sizeof(AVMasteringDisplayMetadata));
1827  if (!metadata) {
1828  return AVERROR(ENOMEM);
1829  }
1830  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1831  if (has_mastering_primaries) {
1832  metadata->display_primaries[0][0] = av_make_q(
1833  round(mastering_meta->r_x * chroma_den), chroma_den);
1834  metadata->display_primaries[0][1] = av_make_q(
1835  round(mastering_meta->r_y * chroma_den), chroma_den);
1836  metadata->display_primaries[1][0] = av_make_q(
1837  round(mastering_meta->g_x * chroma_den), chroma_den);
1838  metadata->display_primaries[1][1] = av_make_q(
1839  round(mastering_meta->g_y * chroma_den), chroma_den);
1840  metadata->display_primaries[2][0] = av_make_q(
1841  round(mastering_meta->b_x * chroma_den), chroma_den);
1842  metadata->display_primaries[2][1] = av_make_q(
1843  round(mastering_meta->b_y * chroma_den), chroma_den);
1844  metadata->white_point[0] = av_make_q(
1845  round(mastering_meta->white_x * chroma_den), chroma_den);
1846  metadata->white_point[1] = av_make_q(
1847  round(mastering_meta->white_y * chroma_den), chroma_den);
1848  metadata->has_primaries = 1;
1849  }
1850  if (has_mastering_luminance) {
1851  metadata->max_luminance = av_make_q(
1852  round(mastering_meta->max_luminance * luma_den), luma_den);
1853  metadata->min_luminance = av_make_q(
1854  round(mastering_meta->min_luminance * luma_den), luma_den);
1855  metadata->has_luminance = 1;
1856  }
1857  }
1858  return 0;
1859 }
1860 
1861 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1862 {
1863  const AVCodecTag *codec_tags;
1864 
1865  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1867 
1868  /* Normalize noncompliant private data that starts with the fourcc
1869  * by expanding/shifting the data by 4 bytes and storing the data
1870  * size at the start. */
1871  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1872  uint8_t *p = av_realloc(track->codec_priv.data,
1873  track->codec_priv.size + 4);
1874  if (!p)
1875  return AVERROR(ENOMEM);
1876  memmove(p + 4, p, track->codec_priv.size);
1877  track->codec_priv.data = p;
1878  track->codec_priv.size += 4;
1879  AV_WB32(track->codec_priv.data, track->codec_priv.size);
1880  }
1881 
1882  *fourcc = AV_RL32(track->codec_priv.data + 4);
1883  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1884 
1885  return 0;
1886 }
1887 
1889 {
1890  MatroskaDemuxContext *matroska = s->priv_data;
1891  MatroskaTrack *tracks = matroska->tracks.elem;
1892  AVStream *st;
1893  int i, j, ret;
1894  int k;
1895 
1896  for (i = 0; i < matroska->tracks.nb_elem; i++) {
1897  MatroskaTrack *track = &tracks[i];
1899  EbmlList *encodings_list = &track->encodings;
1900  MatroskaTrackEncoding *encodings = encodings_list->elem;
1901  uint8_t *extradata = NULL;
1902  int extradata_size = 0;
1903  int extradata_offset = 0;
1904  uint32_t fourcc = 0;
1905  AVIOContext b;
1906  char* key_id_base64 = NULL;
1907  int bit_depth = -1;
1908 
1909  /* Apply some sanity checks. */
1910  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1911  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1912  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1913  track->type != MATROSKA_TRACK_TYPE_METADATA) {
1914  av_log(matroska->ctx, AV_LOG_INFO,
1915  "Unknown or unsupported track type %"PRIu64"\n",
1916  track->type);
1917  continue;
1918  }
1919  if (!track->codec_id)
1920  continue;
1921 
1922  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1923  isnan(track->audio.samplerate)) {
1924  av_log(matroska->ctx, AV_LOG_WARNING,
1925  "Invalid sample rate %f, defaulting to 8000 instead.\n",
1926  track->audio.samplerate);
1927  track->audio.samplerate = 8000;
1928  }
1929 
1930  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1931  if (!track->default_duration && track->video.frame_rate > 0)
1932  track->default_duration = 1000000000 / track->video.frame_rate;
1933  if (track->video.display_width == -1)
1934  track->video.display_width = track->video.pixel_width;
1935  if (track->video.display_height == -1)
1936  track->video.display_height = track->video.pixel_height;
1937  if (track->video.color_space.size == 4)
1938  fourcc = AV_RL32(track->video.color_space.data);
1939  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1940  if (!track->audio.out_samplerate)
1941  track->audio.out_samplerate = track->audio.samplerate;
1942  }
1943  if (encodings_list->nb_elem > 1) {
1944  av_log(matroska->ctx, AV_LOG_ERROR,
1945  "Multiple combined encodings not supported");
1946  } else if (encodings_list->nb_elem == 1) {
1947  if (encodings[0].type) {
1948  if (encodings[0].encryption.key_id.size > 0) {
1949  /* Save the encryption key id to be stored later as a
1950  metadata tag. */
1951  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1952  key_id_base64 = av_malloc(b64_size);
1953  if (key_id_base64 == NULL)
1954  return AVERROR(ENOMEM);
1955 
1956  av_base64_encode(key_id_base64, b64_size,
1957  encodings[0].encryption.key_id.data,
1958  encodings[0].encryption.key_id.size);
1959  } else {
1960  encodings[0].scope = 0;
1961  av_log(matroska->ctx, AV_LOG_ERROR,
1962  "Unsupported encoding type");
1963  }
1964  } else if (
1965 #if CONFIG_ZLIB
1966  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1967 #endif
1968 #if CONFIG_BZLIB
1970 #endif
1971 #if CONFIG_LZO
1973 #endif
1975  encodings[0].scope = 0;
1976  av_log(matroska->ctx, AV_LOG_ERROR,
1977  "Unsupported encoding type");
1978  } else if (track->codec_priv.size && encodings[0].scope & 2) {
1979  uint8_t *codec_priv = track->codec_priv.data;
1980  int ret = matroska_decode_buffer(&track->codec_priv.data,
1981  &track->codec_priv.size,
1982  track);
1983  if (ret < 0) {
1984  track->codec_priv.data = NULL;
1985  track->codec_priv.size = 0;
1986  av_log(matroska->ctx, AV_LOG_ERROR,
1987  "Failed to decode codec private data\n");
1988  }
1989 
1990  if (codec_priv != track->codec_priv.data)
1991  av_free(codec_priv);
1992  }
1993  }
1994 
1995  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1996  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1997  strlen(ff_mkv_codec_tags[j].str))) {
1998  codec_id = ff_mkv_codec_tags[j].id;
1999  break;
2000  }
2001  }
2002 
2003  st = track->stream = avformat_new_stream(s, NULL);
2004  if (!st) {
2005  av_free(key_id_base64);
2006  return AVERROR(ENOMEM);
2007  }
2008 
2009  if (key_id_base64) {
2010  /* export encryption key id as base64 metadata tag */
2011  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2012  av_freep(&key_id_base64);
2013  }
2014 
2015  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2016  track->codec_priv.size >= 40 &&
2017  track->codec_priv.data) {
2018  track->ms_compat = 1;
2019  bit_depth = AV_RL16(track->codec_priv.data + 14);
2020  fourcc = AV_RL32(track->codec_priv.data + 16);
2022  fourcc);
2023  if (!codec_id)
2025  fourcc);
2026  extradata_offset = 40;
2027  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2028  track->codec_priv.size >= 14 &&
2029  track->codec_priv.data) {
2030  int ret;
2031  ffio_init_context(&b, track->codec_priv.data,
2032  track->codec_priv.size,
2033  0, NULL, NULL, NULL, NULL);
2034  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2035  if (ret < 0)
2036  return ret;
2037  codec_id = st->codecpar->codec_id;
2038  fourcc = st->codecpar->codec_tag;
2039  extradata_offset = FFMIN(track->codec_priv.size, 18);
2040  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2041  /* Normally 36, but allow noncompliant private data */
2042  && (track->codec_priv.size >= 32)
2043  && (track->codec_priv.data)) {
2044  uint16_t sample_size;
2045  int ret = get_qt_codec(track, &fourcc, &codec_id);
2046  if (ret < 0)
2047  return ret;
2048  sample_size = AV_RB16(track->codec_priv.data + 26);
2049  if (fourcc == 0) {
2050  if (sample_size == 8) {
2051  fourcc = MKTAG('r','a','w',' ');
2052  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2053  } else if (sample_size == 16) {
2054  fourcc = MKTAG('t','w','o','s');
2055  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2056  }
2057  }
2058  if ((fourcc == MKTAG('t','w','o','s') ||
2059  fourcc == MKTAG('s','o','w','t')) &&
2060  sample_size == 8)
2061  codec_id = AV_CODEC_ID_PCM_S8;
2062  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2063  (track->codec_priv.size >= 21) &&
2064  (track->codec_priv.data)) {
2065  int ret = get_qt_codec(track, &fourcc, &codec_id);
2066  if (ret < 0)
2067  return ret;
2068  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2069  fourcc = MKTAG('S','V','Q','3');
2070  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2071  }
2072  if (codec_id == AV_CODEC_ID_NONE) {
2073  char buf[32];
2074  av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2075  av_log(matroska->ctx, AV_LOG_ERROR,
2076  "mov FourCC not found %s.\n", buf);
2077  }
2078  if (track->codec_priv.size >= 86) {
2079  bit_depth = AV_RB16(track->codec_priv.data + 82);
2080  ffio_init_context(&b, track->codec_priv.data,
2081  track->codec_priv.size,
2082  0, NULL, NULL, NULL, NULL);
2083  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2084  bit_depth &= 0x1F;
2085  track->has_palette = 1;
2086  }
2087  }
2088  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2089  switch (track->audio.bitdepth) {
2090  case 8:
2091  codec_id = AV_CODEC_ID_PCM_U8;
2092  break;
2093  case 24:
2094  codec_id = AV_CODEC_ID_PCM_S24BE;
2095  break;
2096  case 32:
2097  codec_id = AV_CODEC_ID_PCM_S32BE;
2098  break;
2099  }
2100  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2101  switch (track->audio.bitdepth) {
2102  case 8:
2103  codec_id = AV_CODEC_ID_PCM_U8;
2104  break;
2105  case 24:
2106  codec_id = AV_CODEC_ID_PCM_S24LE;
2107  break;
2108  case 32:
2109  codec_id = AV_CODEC_ID_PCM_S32LE;
2110  break;
2111  }
2112  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2113  track->audio.bitdepth == 64) {
2114  codec_id = AV_CODEC_ID_PCM_F64LE;
2115  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2116  int profile = matroska_aac_profile(track->codec_id);
2117  int sri = matroska_aac_sri(track->audio.samplerate);
2118  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2119  if (!extradata)
2120  return AVERROR(ENOMEM);
2121  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2122  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2123  if (strstr(track->codec_id, "SBR")) {
2124  sri = matroska_aac_sri(track->audio.out_samplerate);
2125  extradata[2] = 0x56;
2126  extradata[3] = 0xE5;
2127  extradata[4] = 0x80 | (sri << 3);
2128  extradata_size = 5;
2129  } else
2130  extradata_size = 2;
2131  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2132  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2133  * Create the "atom size", "tag", and "tag version" fields the
2134  * decoder expects manually. */
2135  extradata_size = 12 + track->codec_priv.size;
2136  extradata = av_mallocz(extradata_size +
2138  if (!extradata)
2139  return AVERROR(ENOMEM);
2140  AV_WB32(extradata, extradata_size);
2141  memcpy(&extradata[4], "alac", 4);
2142  AV_WB32(&extradata[8], 0);
2143  memcpy(&extradata[12], track->codec_priv.data,
2144  track->codec_priv.size);
2145  } else if (codec_id == AV_CODEC_ID_TTA) {
2146  extradata_size = 30;
2147  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2148  if (!extradata)
2149  return AVERROR(ENOMEM);
2150  ffio_init_context(&b, extradata, extradata_size, 1,
2151  NULL, NULL, NULL, NULL);
2152  avio_write(&b, "TTA1", 4);
2153  avio_wl16(&b, 1);
2154  if (track->audio.channels > UINT16_MAX ||
2155  track->audio.bitdepth > UINT16_MAX) {
2156  av_log(matroska->ctx, AV_LOG_WARNING,
2157  "Too large audio channel number %"PRIu64
2158  " or bitdepth %"PRIu64". Skipping track.\n",
2159  track->audio.channels, track->audio.bitdepth);
2160  av_freep(&extradata);
2161  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2162  return AVERROR_INVALIDDATA;
2163  else
2164  continue;
2165  }
2166  avio_wl16(&b, track->audio.channels);
2167  avio_wl16(&b, track->audio.bitdepth);
2168  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2169  return AVERROR_INVALIDDATA;
2170  avio_wl32(&b, track->audio.out_samplerate);
2171  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2172  track->audio.out_samplerate,
2173  AV_TIME_BASE * 1000));
2174  } else if (codec_id == AV_CODEC_ID_RV10 ||
2175  codec_id == AV_CODEC_ID_RV20 ||
2176  codec_id == AV_CODEC_ID_RV30 ||
2177  codec_id == AV_CODEC_ID_RV40) {
2178  extradata_offset = 26;
2179  } else if (codec_id == AV_CODEC_ID_RA_144) {
2180  track->audio.out_samplerate = 8000;
2181  track->audio.channels = 1;
2182  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2183  codec_id == AV_CODEC_ID_COOK ||
2184  codec_id == AV_CODEC_ID_ATRAC3 ||
2185  codec_id == AV_CODEC_ID_SIPR)
2186  && track->codec_priv.data) {
2187  int flavor;
2188 
2189  ffio_init_context(&b, track->codec_priv.data,
2190  track->codec_priv.size,
2191  0, NULL, NULL, NULL, NULL);
2192  avio_skip(&b, 22);
2193  flavor = avio_rb16(&b);
2194  track->audio.coded_framesize = avio_rb32(&b);
2195  avio_skip(&b, 12);
2196  track->audio.sub_packet_h = avio_rb16(&b);
2197  track->audio.frame_size = avio_rb16(&b);
2198  track->audio.sub_packet_size = avio_rb16(&b);
2199  if (flavor < 0 ||
2200  track->audio.coded_framesize <= 0 ||
2201  track->audio.sub_packet_h <= 0 ||
2202  track->audio.frame_size <= 0 ||
2203  track->audio.sub_packet_size <= 0)
2204  return AVERROR_INVALIDDATA;
2205  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2206  track->audio.frame_size);
2207  if (!track->audio.buf)
2208  return AVERROR(ENOMEM);
2209  if (codec_id == AV_CODEC_ID_RA_288) {
2210  st->codecpar->block_align = track->audio.coded_framesize;
2211  track->codec_priv.size = 0;
2212  } else {
2213  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2214  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2215  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2216  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2217  }
2218  st->codecpar->block_align = track->audio.sub_packet_size;
2219  extradata_offset = 78;
2220  }
2221  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2222  ret = matroska_parse_flac(s, track, &extradata_offset);
2223  if (ret < 0)
2224  return ret;
2225  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2226  fourcc = AV_RL32(track->codec_priv.data);
2227  }
2228  track->codec_priv.size -= extradata_offset;
2229 
2230  if (codec_id == AV_CODEC_ID_NONE)
2231  av_log(matroska->ctx, AV_LOG_INFO,
2232  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2233 
2234  if (track->time_scale < 0.01)
2235  track->time_scale = 1.0;
2236  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2237  1000 * 1000 * 1000); /* 64 bit pts in ns */
2238 
2239  /* convert the delay from ns to the track timebase */
2241  (AVRational){ 1, 1000000000 },
2242  st->time_base);
2243 
2244  st->codecpar->codec_id = codec_id;
2245 
2246  if (strcmp(track->language, "und"))
2247  av_dict_set(&st->metadata, "language", track->language, 0);
2248  av_dict_set(&st->metadata, "title", track->name, 0);
2249 
2250  if (track->flag_default)
2252  if (track->flag_forced)
2254 
2255  if (!st->codecpar->extradata) {
2256  if (extradata) {
2257  st->codecpar->extradata = extradata;
2258  st->codecpar->extradata_size = extradata_size;
2259  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2260  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2261  return AVERROR(ENOMEM);
2262  memcpy(st->codecpar->extradata,
2263  track->codec_priv.data + extradata_offset,
2264  track->codec_priv.size);
2265  }
2266  }
2267 
2268  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2269  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2270  int display_width_mul = 1;
2271  int display_height_mul = 1;
2272 
2274  st->codecpar->codec_tag = fourcc;
2275  if (bit_depth >= 0)
2277  st->codecpar->width = track->video.pixel_width;
2278  st->codecpar->height = track->video.pixel_height;
2279 
2280  if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2281  st->codecpar->field_order = mkv_field_order(track->video.field_order);
2282 
2283  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2284  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2285 
2287  &st->sample_aspect_ratio.den,
2288  st->codecpar->height * track->video.display_width * display_width_mul,
2289  st->codecpar->width * track->video.display_height * display_height_mul,
2290  255);
2291  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2293 
2294  if (track->default_duration) {
2296  1000000000, track->default_duration, 30000);
2297 #if FF_API_R_FRAME_RATE
2298  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2299  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2300  st->r_frame_rate = st->avg_frame_rate;
2301 #endif
2302  }
2303 
2304  /* export stereo mode flag as metadata tag */
2305  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2306  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2307 
2308  /* export alpha mode flag as metadata tag */
2309  if (track->video.alpha_mode)
2310  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2311 
2312  /* if we have virtual track, mark the real tracks */
2313  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2314  char buf[32];
2315  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2316  continue;
2317  snprintf(buf, sizeof(buf), "%s_%d",
2318  ff_matroska_video_stereo_plane[planes[j].type], i);
2319  for (k=0; k < matroska->tracks.nb_elem; k++)
2320  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2321  av_dict_set(&tracks[k].stream->metadata,
2322  "stereo_mode", buf, 0);
2323  break;
2324  }
2325  }
2326  // add stream level stereo3d side data if it is a supported format
2327  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2328  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2329  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2330  if (ret < 0)
2331  return ret;
2332  }
2333 
2335  int ret = mkv_parse_video_color(st, track);
2336  if (ret < 0)
2337  return ret;
2338  }
2339  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2341  st->codecpar->codec_tag = fourcc;
2342  st->codecpar->sample_rate = track->audio.out_samplerate;
2343  st->codecpar->channels = track->audio.channels;
2344  if (!st->codecpar->bits_per_coded_sample)
2345  st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2346  if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2348  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2350  if (track->codec_delay > 0) {
2351  st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2352  (AVRational){1, 1000000000},
2354  48000 : st->codecpar->sample_rate});
2355  }
2356  if (track->seek_preroll > 0) {
2357  st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2358  (AVRational){1, 1000000000},
2359  (AVRational){1, st->codecpar->sample_rate});
2360  }
2361  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2362  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2363 
2364  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2365  st->disposition |= AV_DISPOSITION_CAPTIONS;
2366  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2367  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2368  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2369  st->disposition |= AV_DISPOSITION_METADATA;
2370  }
2371  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2372  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2373  if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2374  matroska->contains_ssa = 1;
2375  }
2376  }
2377 
2378  return 0;
2379 }
2380 
2382 {
2383  MatroskaDemuxContext *matroska = s->priv_data;
2384  EbmlList *attachments_list = &matroska->attachments;
2385  EbmlList *chapters_list = &matroska->chapters;
2386  MatroskaAttachment *attachments;
2387  MatroskaChapter *chapters;
2388  uint64_t max_start = 0;
2389  int64_t pos;
2390  Ebml ebml = { 0 };
2391  int i, j, res;
2392 
2393  matroska->ctx = s;
2394  matroska->cues_parsing_deferred = 1;
2395 
2396  /* First read the EBML header. */
2397  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2398  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2399  ebml_free(ebml_syntax, &ebml);
2400  return AVERROR_INVALIDDATA;
2401  }
2402  if (ebml.version > EBML_VERSION ||
2403  ebml.max_size > sizeof(uint64_t) ||
2404  ebml.id_length > sizeof(uint32_t) ||
2405  ebml.doctype_version > 3) {
2406  av_log(matroska->ctx, AV_LOG_ERROR,
2407  "EBML header using unsupported features\n"
2408  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2409  ebml.version, ebml.doctype, ebml.doctype_version);
2410  ebml_free(ebml_syntax, &ebml);
2411  return AVERROR_PATCHWELCOME;
2412  } else if (ebml.doctype_version == 3) {
2413  av_log(matroska->ctx, AV_LOG_WARNING,
2414  "EBML header using unsupported features\n"
2415  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2416  ebml.version, ebml.doctype, ebml.doctype_version);
2417  }
2418  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2419  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2420  break;
2421  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2422  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2423  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2424  ebml_free(ebml_syntax, &ebml);
2425  return AVERROR_INVALIDDATA;
2426  }
2427  }
2428  ebml_free(ebml_syntax, &ebml);
2429 
2430  /* The next thing is a segment. */
2431  pos = avio_tell(matroska->ctx->pb);
2432  res = ebml_parse(matroska, matroska_segments, matroska);
2433  // try resyncing until we find a EBML_STOP type element.
2434  while (res != 1) {
2435  res = matroska_resync(matroska, pos);
2436  if (res < 0)
2437  goto fail;
2438  pos = avio_tell(matroska->ctx->pb);
2439  res = ebml_parse(matroska, matroska_segment, matroska);
2440  }
2441  matroska_execute_seekhead(matroska);
2442 
2443  if (!matroska->time_scale)
2444  matroska->time_scale = 1000000;
2445  if (matroska->duration)
2446  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2447  1000 / AV_TIME_BASE;
2448  av_dict_set(&s->metadata, "title", matroska->title, 0);
2449  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2450 
2451  if (matroska->date_utc.size == 8)
2453 
2454  res = matroska_parse_tracks(s);
2455  if (res < 0)
2456  goto fail;
2457 
2458  attachments = attachments_list->elem;
2459  for (j = 0; j < attachments_list->nb_elem; j++) {
2460  if (!(attachments[j].filename && attachments[j].mime &&
2461  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2462  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2463  } else {
2464  AVStream *st = avformat_new_stream(s, NULL);
2465  if (!st)
2466  break;
2467  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2468  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2470 
2471  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2472  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2473  strlen(ff_mkv_image_mime_tags[i].str))) {
2475  break;
2476  }
2477  }
2478 
2479  attachments[j].stream = st;
2480 
2481  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2484 
2486  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2487  return res;
2488  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2489  st->attached_pic.stream_index = st->index;
2491  } else {
2493  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2494  break;
2495  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2496  attachments[j].bin.size);
2497 
2498  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2499  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2500  strlen(ff_mkv_mime_tags[i].str))) {
2502  break;
2503  }
2504  }
2505  }
2506  }
2507  }
2508 
2509  chapters = chapters_list->elem;
2510  for (i = 0; i < chapters_list->nb_elem; i++)
2511  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2512  (max_start == 0 || chapters[i].start > max_start)) {
2513  chapters[i].chapter =
2514  avpriv_new_chapter(s, chapters[i].uid,
2515  (AVRational) { 1, 1000000000 },
2516  chapters[i].start, chapters[i].end,
2517  chapters[i].title);
2518  if (chapters[i].chapter) {
2519  av_dict_set(&chapters[i].chapter->metadata,
2520  "title", chapters[i].title, 0);
2521  }
2522  max_start = chapters[i].start;
2523  }
2524 
2525  matroska_add_index_entries(matroska);
2526 
2528 
2529  return 0;
2530 fail:
2532  return res;
2533 }
2534 
2535 /*
2536  * Put one packet in an application-supplied AVPacket struct.
2537  * Returns 0 on success or -1 on failure.
2538  */
2540  AVPacket *pkt)
2541 {
2542  if (matroska->num_packets > 0) {
2543  MatroskaTrack *tracks = matroska->tracks.elem;
2544  MatroskaTrack *track;
2545  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2546  av_freep(&matroska->packets[0]);
2547  track = &tracks[pkt->stream_index];
2548  if (track->has_palette) {
2550  if (!pal) {
2551  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2552  } else {
2553  memcpy(pal, track->palette, AVPALETTE_SIZE);
2554  }
2555  track->has_palette = 0;
2556  }
2557  if (matroska->num_packets > 1) {
2558  void *newpackets;
2559  memmove(&matroska->packets[0], &matroska->packets[1],
2560  (matroska->num_packets - 1) * sizeof(AVPacket *));
2561  newpackets = av_realloc(matroska->packets,
2562  (matroska->num_packets - 1) *
2563  sizeof(AVPacket *));
2564  if (newpackets)
2565  matroska->packets = newpackets;
2566  } else {
2567  av_freep(&matroska->packets);
2568  matroska->prev_pkt = NULL;
2569  }
2570  matroska->num_packets--;
2571  return 0;
2572  }
2573 
2574  return -1;
2575 }
2576 
2577 /*
2578  * Free all packets in our internal queue.
2579  */
2581 {
2582  matroska->prev_pkt = NULL;
2583  if (matroska->packets) {
2584  int n;
2585  for (n = 0; n < matroska->num_packets; n++) {
2586  av_packet_unref(matroska->packets[n]);
2587  av_freep(&matroska->packets[n]);
2588  }
2589  av_freep(&matroska->packets);
2590  matroska->num_packets = 0;
2591  }
2592 }
2593 
2595  int *buf_size, int type,
2596  uint32_t **lace_buf, int *laces)
2597 {
2598  int res = 0, n, size = *buf_size;
2599  uint8_t *data = *buf;
2600  uint32_t *lace_size;
2601 
2602  if (!type) {
2603  *laces = 1;
2604  *lace_buf = av_mallocz(sizeof(int));
2605  if (!*lace_buf)
2606  return AVERROR(ENOMEM);
2607 
2608  *lace_buf[0] = size;
2609  return 0;
2610  }
2611 
2612  av_assert0(size > 0);
2613  *laces = *data + 1;
2614  data += 1;
2615  size -= 1;
2616  lace_size = av_mallocz(*laces * sizeof(int));
2617  if (!lace_size)
2618  return AVERROR(ENOMEM);
2619 
2620  switch (type) {
2621  case 0x1: /* Xiph lacing */
2622  {
2623  uint8_t temp;
2624  uint32_t total = 0;
2625  for (n = 0; res == 0 && n < *laces - 1; n++) {
2626  while (1) {
2627  if (size <= total) {
2628  res = AVERROR_INVALIDDATA;
2629  break;
2630  }
2631  temp = *data;
2632  total += temp;
2633  lace_size[n] += temp;
2634  data += 1;
2635  size -= 1;
2636  if (temp != 0xff)
2637  break;
2638  }
2639  }
2640  if (size <= total) {
2641  res = AVERROR_INVALIDDATA;
2642  break;
2643  }
2644 
2645  lace_size[n] = size - total;
2646  break;
2647  }
2648 
2649  case 0x2: /* fixed-size lacing */
2650  if (size % (*laces)) {
2651  res = AVERROR_INVALIDDATA;
2652  break;
2653  }
2654  for (n = 0; n < *laces; n++)
2655  lace_size[n] = size / *laces;
2656  break;
2657 
2658  case 0x3: /* EBML lacing */
2659  {
2660  uint64_t num;
2661  uint64_t total;
2662  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2663  if (n < 0 || num > INT_MAX) {
2664  av_log(matroska->ctx, AV_LOG_INFO,
2665  "EBML block data error\n");
2666  res = n<0 ? n : AVERROR_INVALIDDATA;
2667  break;
2668  }
2669  data += n;
2670  size -= n;
2671  total = lace_size[0] = num;
2672  for (n = 1; res == 0 && n < *laces - 1; n++) {
2673  int64_t snum;
2674  int r;
2675  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2676  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2677  av_log(matroska->ctx, AV_LOG_INFO,
2678  "EBML block data error\n");
2679  res = r<0 ? r : AVERROR_INVALIDDATA;
2680  break;
2681  }
2682  data += r;
2683  size -= r;
2684  lace_size[n] = lace_size[n - 1] + snum;
2685  total += lace_size[n];
2686  }
2687  if (size <= total) {
2688  res = AVERROR_INVALIDDATA;
2689  break;
2690  }
2691  lace_size[*laces - 1] = size - total;
2692  break;
2693  }
2694  }
2695 
2696  *buf = data;
2697  *lace_buf = lace_size;
2698  *buf_size = size;
2699 
2700  return res;
2701 }
2702 
2704  MatroskaTrack *track, AVStream *st,
2705  uint8_t *data, int size, uint64_t timecode,
2706  int64_t pos)
2707 {
2708  int a = st->codecpar->block_align;
2709  int sps = track->audio.sub_packet_size;
2710  int cfs = track->audio.coded_framesize;
2711  int h = track->audio.sub_packet_h;
2712  int y = track->audio.sub_packet_cnt;
2713  int w = track->audio.frame_size;
2714  int x;
2715 
2716  if (!track->audio.pkt_cnt) {
2717  if (track->audio.sub_packet_cnt == 0)
2718  track->audio.buf_timecode = timecode;
2719  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2720  if (size < cfs * h / 2) {
2721  av_log(matroska->ctx, AV_LOG_ERROR,
2722  "Corrupt int4 RM-style audio packet size\n");
2723  return AVERROR_INVALIDDATA;
2724  }
2725  for (x = 0; x < h / 2; x++)
2726  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2727  data + x * cfs, cfs);
2728  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2729  if (size < w) {
2730  av_log(matroska->ctx, AV_LOG_ERROR,
2731  "Corrupt sipr RM-style audio packet size\n");
2732  return AVERROR_INVALIDDATA;
2733  }
2734  memcpy(track->audio.buf + y * w, data, w);
2735  } else {
2736  if (size < sps * w / sps || h<=0 || w%sps) {
2737  av_log(matroska->ctx, AV_LOG_ERROR,
2738  "Corrupt generic RM-style audio packet size\n");
2739  return AVERROR_INVALIDDATA;
2740  }
2741  for (x = 0; x < w / sps; x++)
2742  memcpy(track->audio.buf +
2743  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2744  data + x * sps, sps);
2745  }
2746 
2747  if (++track->audio.sub_packet_cnt >= h) {
2748  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2749  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2750  track->audio.sub_packet_cnt = 0;
2751  track->audio.pkt_cnt = h * w / a;
2752  }
2753  }
2754 
2755  while (track->audio.pkt_cnt) {
2756  int ret;
2757  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2758  if (!pkt)
2759  return AVERROR(ENOMEM);
2760 
2761  ret = av_new_packet(pkt, a);
2762  if (ret < 0) {
2763  av_free(pkt);
2764  return ret;
2765  }
2766  memcpy(pkt->data,
2767  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2768  a);
2769  pkt->pts = track->audio.buf_timecode;
2771  pkt->pos = pos;
2772  pkt->stream_index = st->index;
2773  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2774  }
2775 
2776  return 0;
2777 }
2778 
2779 /* reconstruct full wavpack blocks from mangled matroska ones */
2781  uint8_t **pdst, int *size)
2782 {
2783  uint8_t *dst = NULL;
2784  int dstlen = 0;
2785  int srclen = *size;
2786  uint32_t samples;
2787  uint16_t ver;
2788  int ret, offset = 0;
2789 
2790  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2791  return AVERROR_INVALIDDATA;
2792 
2793  ver = AV_RL16(track->stream->codecpar->extradata);
2794 
2795  samples = AV_RL32(src);
2796  src += 4;
2797  srclen -= 4;
2798 
2799  while (srclen >= 8) {
2800  int multiblock;
2801  uint32_t blocksize;
2802  uint8_t *tmp;
2803 
2804  uint32_t flags = AV_RL32(src);
2805  uint32_t crc = AV_RL32(src + 4);
2806  src += 8;
2807  srclen -= 8;
2808 
2809  multiblock = (flags & 0x1800) != 0x1800;
2810  if (multiblock) {
2811  if (srclen < 4) {
2812  ret = AVERROR_INVALIDDATA;
2813  goto fail;
2814  }
2815  blocksize = AV_RL32(src);
2816  src += 4;
2817  srclen -= 4;
2818  } else
2819  blocksize = srclen;
2820 
2821  if (blocksize > srclen) {
2822  ret = AVERROR_INVALIDDATA;
2823  goto fail;
2824  }
2825 
2826  tmp = av_realloc(dst, dstlen + blocksize + 32);
2827  if (!tmp) {
2828  ret = AVERROR(ENOMEM);
2829  goto fail;
2830  }
2831  dst = tmp;
2832  dstlen += blocksize + 32;
2833 
2834  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2835  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2836  AV_WL16(dst + offset + 8, ver); // version
2837  AV_WL16(dst + offset + 10, 0); // track/index_no
2838  AV_WL32(dst + offset + 12, 0); // total samples
2839  AV_WL32(dst + offset + 16, 0); // block index
2840  AV_WL32(dst + offset + 20, samples); // number of samples
2841  AV_WL32(dst + offset + 24, flags); // flags
2842  AV_WL32(dst + offset + 28, crc); // crc
2843  memcpy(dst + offset + 32, src, blocksize); // block data
2844 
2845  src += blocksize;
2846  srclen -= blocksize;
2847  offset += blocksize + 32;
2848  }
2849 
2850  *pdst = dst;
2851  *size = dstlen;
2852 
2853  return 0;
2854 
2855 fail:
2856  av_freep(&dst);
2857  return ret;
2858 }
2859 
2861  MatroskaTrack *track,
2862  AVStream *st,
2863  uint8_t *data, int data_len,
2864  uint64_t timecode,
2865  uint64_t duration,
2866  int64_t pos)
2867 {
2868  AVPacket *pkt;
2869  uint8_t *id, *settings, *text, *buf;
2870  int id_len, settings_len, text_len;
2871  uint8_t *p, *q;
2872  int err;
2873 
2874  if (data_len <= 0)
2875  return AVERROR_INVALIDDATA;
2876 
2877  p = data;
2878  q = data + data_len;
2879 
2880  id = p;
2881  id_len = -1;
2882  while (p < q) {
2883  if (*p == '\r' || *p == '\n') {
2884  id_len = p - id;
2885  if (*p == '\r')
2886  p++;
2887  break;
2888  }
2889  p++;
2890  }
2891 
2892  if (p >= q || *p != '\n')
2893  return AVERROR_INVALIDDATA;
2894  p++;
2895 
2896  settings = p;
2897  settings_len = -1;
2898  while (p < q) {
2899  if (*p == '\r' || *p == '\n') {
2900  settings_len = p - settings;
2901  if (*p == '\r')
2902  p++;
2903  break;
2904  }
2905  p++;
2906  }
2907 
2908  if (p >= q || *p != '\n')
2909  return AVERROR_INVALIDDATA;
2910  p++;
2911 
2912  text = p;
2913  text_len = q - p;
2914  while (text_len > 0) {
2915  const int len = text_len - 1;
2916  const uint8_t c = p[len];
2917  if (c != '\r' && c != '\n')
2918  break;
2919  text_len = len;
2920  }
2921 
2922  if (text_len <= 0)
2923  return AVERROR_INVALIDDATA;
2924 
2925  pkt = av_mallocz(sizeof(*pkt));
2926  if (!pkt)
2927  return AVERROR(ENOMEM);
2928  err = av_new_packet(pkt, text_len);
2929  if (err < 0) {
2930  av_free(pkt);
2931  return AVERROR(err);
2932  }
2933 
2934  memcpy(pkt->data, text, text_len);
2935 
2936  if (id_len > 0) {
2937  buf = av_packet_new_side_data(pkt,
2939  id_len);
2940  if (!buf) {
2941  av_free(pkt);
2942  return AVERROR(ENOMEM);
2943  }
2944  memcpy(buf, id, id_len);
2945  }
2946 
2947  if (settings_len > 0) {
2948  buf = av_packet_new_side_data(pkt,
2950  settings_len);
2951  if (!buf) {
2952  av_free(pkt);
2953  return AVERROR(ENOMEM);
2954  }
2955  memcpy(buf, settings, settings_len);
2956  }
2957 
2958  // Do we need this for subtitles?
2959  // pkt->flags = AV_PKT_FLAG_KEY;
2960 
2961  pkt->stream_index = st->index;
2962  pkt->pts = timecode;
2963 
2964  // Do we need this for subtitles?
2965  // pkt->dts = timecode;
2966 
2967  pkt->duration = duration;
2968  pkt->pos = pos;
2969 
2970  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2971  matroska->prev_pkt = pkt;
2972 
2973  return 0;
2974 }
2975 
2977  MatroskaTrack *track, AVStream *st,
2978  uint8_t *data, int pkt_size,
2979  uint64_t timecode, uint64_t lace_duration,
2980  int64_t pos, int is_keyframe,
2981  uint8_t *additional, uint64_t additional_id, int additional_size,
2982  int64_t discard_padding)
2983 {
2984  MatroskaTrackEncoding *encodings = track->encodings.elem;
2985  uint8_t *pkt_data = data;
2986  int offset = 0, res;
2987  AVPacket *pkt;
2988 
2989  if (encodings && !encodings->type && encodings->scope & 1) {
2990  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2991  if (res < 0)
2992  return res;
2993  }
2994 
2995  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
2996  uint8_t *wv_data;
2997  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2998  if (res < 0) {
2999  av_log(matroska->ctx, AV_LOG_ERROR,
3000  "Error parsing a wavpack block.\n");
3001  goto fail;
3002  }
3003  if (pkt_data != data)
3004  av_freep(&pkt_data);
3005  pkt_data = wv_data;
3006  }
3007 
3008  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3009  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3010  offset = 8;
3011 
3012  pkt = av_mallocz(sizeof(AVPacket));
3013  if (!pkt) {
3014  if (pkt_data != data)
3015  av_freep(&pkt_data);
3016  return AVERROR(ENOMEM);
3017  }
3018  /* XXX: prevent data copy... */
3019  if (av_new_packet(pkt, pkt_size + offset) < 0) {
3020  av_free(pkt);
3021  res = AVERROR(ENOMEM);
3022  goto fail;
3023  }
3024 
3025  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3026  uint8_t *buf = pkt->data;
3027  bytestream_put_be32(&buf, pkt_size);
3028  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3029  }
3030 
3031  memcpy(pkt->data + offset, pkt_data, pkt_size);
3032 
3033  if (pkt_data != data)
3034  av_freep(&pkt_data);
3035 
3036  pkt->flags = is_keyframe;
3037  pkt->stream_index = st->index;
3038 
3039  if (additional_size > 0) {
3040  uint8_t *side_data = av_packet_new_side_data(pkt,
3042  additional_size + 8);
3043  if (!side_data) {
3044  av_packet_unref(pkt);
3045  av_free(pkt);
3046  return AVERROR(ENOMEM);
3047  }
3048  AV_WB64(side_data, additional_id);
3049  memcpy(side_data + 8, additional, additional_size);
3050  }
3051 
3052  if (discard_padding) {
3053  uint8_t *side_data = av_packet_new_side_data(pkt,
3055  10);
3056  if (!side_data) {
3057  av_packet_unref(pkt);
3058  av_free(pkt);
3059  return AVERROR(ENOMEM);
3060  }
3061  AV_WL32(side_data, 0);
3062  AV_WL32(side_data + 4, av_rescale_q(discard_padding,
3063  (AVRational){1, 1000000000},
3064  (AVRational){1, st->codecpar->sample_rate}));
3065  }
3066 
3067  if (track->ms_compat)
3068  pkt->dts = timecode;
3069  else
3070  pkt->pts = timecode;
3071  pkt->pos = pos;
3072  pkt->duration = lace_duration;
3073 
3074 #if FF_API_CONVERGENCE_DURATION
3076  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3077  pkt->convergence_duration = lace_duration;
3078  }
3080 #endif
3081 
3082  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3083  matroska->prev_pkt = pkt;
3084 
3085  return 0;
3086 
3087 fail:
3088  if (pkt_data != data)
3089  av_freep(&pkt_data);
3090  return res;
3091 }
3092 
3094  int size, int64_t pos, uint64_t cluster_time,
3095  uint64_t block_duration, int is_keyframe,
3096  uint8_t *additional, uint64_t additional_id, int additional_size,
3097  int64_t cluster_pos, int64_t discard_padding)
3098 {
3099  uint64_t timecode = AV_NOPTS_VALUE;
3100  MatroskaTrack *track;
3101  int res = 0;
3102  AVStream *st;
3103  int16_t block_time;
3104  uint32_t *lace_size = NULL;
3105  int n, flags, laces = 0;
3106  uint64_t num;
3107  int trust_default_duration = 1;
3108 
3109  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3110  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3111  return n;
3112  }
3113  data += n;
3114  size -= n;
3115 
3116  track = matroska_find_track_by_num(matroska, num);
3117  if (!track || !track->stream) {
3118  av_log(matroska->ctx, AV_LOG_INFO,
3119  "Invalid stream %"PRIu64" or size %u\n", num, size);
3120  return AVERROR_INVALIDDATA;
3121  } else if (size <= 3)
3122  return 0;
3123  st = track->stream;
3124  if (st->discard >= AVDISCARD_ALL)
3125  return res;
3126  av_assert1(block_duration != AV_NOPTS_VALUE);
3127 
3128  block_time = sign_extend(AV_RB16(data), 16);
3129  data += 2;
3130  flags = *data++;
3131  size -= 3;
3132  if (is_keyframe == -1)
3133  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3134 
3135  if (cluster_time != (uint64_t) -1 &&
3136  (block_time >= 0 || cluster_time >= -block_time)) {
3137  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3138  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3139  timecode < track->end_timecode)
3140  is_keyframe = 0; /* overlapping subtitles are not key frame */
3141  if (is_keyframe)
3142  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3144  }
3145 
3146  if (matroska->skip_to_keyframe &&
3147  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3148  // Compare signed timecodes. Timecode may be negative due to codec delay
3149  // offset. We don't support timestamps greater than int64_t anyway - see
3150  // AVPacket's pts.
3151  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3152  return res;
3153  if (is_keyframe)
3154  matroska->skip_to_keyframe = 0;
3155  else if (!st->skip_to_keyframe) {
3156  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3157  matroska->skip_to_keyframe = 0;
3158  }
3159  }
3160 
3161  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3162  &lace_size, &laces);
3163 
3164  if (res)
3165  goto end;
3166 
3167  if (track->audio.samplerate == 8000) {
3168  // If this is needed for more codecs, then add them here
3169  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3170  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3171  trust_default_duration = 0;
3172  }
3173  }
3174 
3175  if (!block_duration && trust_default_duration)
3176  block_duration = track->default_duration * laces / matroska->time_scale;
3177 
3178  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3179  track->end_timecode =
3180  FFMAX(track->end_timecode, timecode + block_duration);
3181 
3182  for (n = 0; n < laces; n++) {
3183  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3184 
3185  if (lace_size[n] > size) {
3186  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3187  break;
3188  }
3189 
3190  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3194  st->codecpar->block_align && track->audio.sub_packet_size) {
3195  res = matroska_parse_rm_audio(matroska, track, st, data,
3196  lace_size[n],
3197  timecode, pos);
3198  if (res)
3199  goto end;
3200 
3201  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3202  res = matroska_parse_webvtt(matroska, track, st,
3203  data, lace_size[n],
3204  timecode, lace_duration,
3205  pos);
3206  if (res)
3207  goto end;
3208  } else {
3209  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3210  timecode, lace_duration, pos,
3211  !n ? is_keyframe : 0,
3212  additional, additional_id, additional_size,
3213  discard_padding);
3214  if (res)
3215  goto end;
3216  }
3217 
3218  if (timecode != AV_NOPTS_VALUE)
3219  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3220  data += lace_size[n];
3221  size -= lace_size[n];
3222  }
3223 
3224 end:
3225  av_free(lace_size);
3226  return res;
3227 }
3228 
3230 {
3231  EbmlList *blocks_list;
3232  MatroskaBlock *blocks;
3233  int i, res;
3234  res = ebml_parse(matroska,
3235  matroska_cluster_incremental_parsing,
3236  &matroska->current_cluster);
3237  if (res == 1) {
3238  /* New Cluster */
3239  if (matroska->current_cluster_pos)
3240  ebml_level_end(matroska);
3241  ebml_free(matroska_cluster, &matroska->current_cluster);
3242  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3243  matroska->current_cluster_num_blocks = 0;
3244  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3245  matroska->prev_pkt = NULL;
3246  /* sizeof the ID which was already read */
3247  if (matroska->current_id)
3248  matroska->current_cluster_pos -= 4;
3249  res = ebml_parse(matroska,
3250  matroska_clusters_incremental,
3251  &matroska->current_cluster);
3252  /* Try parsing the block again. */
3253  if (res == 1)
3254  res = ebml_parse(matroska,
3255  matroska_cluster_incremental_parsing,
3256  &matroska->current_cluster);
3257  }
3258 
3259  if (!res &&
3260  matroska->current_cluster_num_blocks <
3261  matroska->current_cluster.blocks.nb_elem) {
3262  blocks_list = &matroska->current_cluster.blocks;
3263  blocks = blocks_list->elem;
3264 
3265  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3266  i = blocks_list->nb_elem - 1;
3267  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3268  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3269  uint8_t* additional = blocks[i].additional.size > 0 ?
3270  blocks[i].additional.data : NULL;
3271  if (!blocks[i].non_simple)
3272  blocks[i].duration = 0;
3273  res = matroska_parse_block(matroska, blocks[i].bin.data,
3274  blocks[i].bin.size, blocks[i].bin.pos,
3275  matroska->current_cluster.timecode,
3276  blocks[i].duration, is_keyframe,
3277  additional, blocks[i].additional_id,
3278  blocks[i].additional.size,
3279  matroska->current_cluster_pos,
3280  blocks[i].discard_padding);
3281  }
3282  }
3283 
3284  return res;
3285 }
3286 
3288 {
3289  MatroskaCluster cluster = { 0 };
3290  EbmlList *blocks_list;
3291  MatroskaBlock *blocks;
3292  int i, res;
3293  int64_t pos;
3294 
3295  if (!matroska->contains_ssa)
3296  return matroska_parse_cluster_incremental(matroska);
3297  pos = avio_tell(matroska->ctx->pb);
3298  matroska->prev_pkt = NULL;
3299  if (matroska->current_id)
3300  pos -= 4; /* sizeof the ID which was already read */
3301  res = ebml_parse(matroska, matroska_clusters, &cluster);
3302  blocks_list = &cluster.blocks;
3303  blocks = blocks_list->elem;
3304  for (i = 0; i < blocks_list->nb_elem; i++)
3305  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3306  int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3307  res = matroska_parse_block(matroska, blocks[i].bin.data,
3308  blocks[i].bin.size, blocks[i].bin.pos,
3309  cluster.timecode, blocks[i].duration,
3310  is_keyframe, NULL, 0, 0, pos,
3311  blocks[i].discard_padding);
3312  }
3313  ebml_free(matroska_cluster, &cluster);
3314  return res;
3315 }
3316 
3318 {
3319  MatroskaDemuxContext *matroska = s->priv_data;
3320 
3321  while (matroska_deliver_packet(matroska, pkt)) {
3322  int64_t pos = avio_tell(matroska->ctx->pb);
3323  if (matroska->done)
3324  return AVERROR_EOF;
3325  if (matroska_parse_cluster(matroska) < 0)
3326  matroska_resync(matroska, pos);
3327  }
3328 
3329  return 0;
3330 }
3331 
3332 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3333  int64_t timestamp, int flags)
3334 {
3335  MatroskaDemuxContext *matroska = s->priv_data;
3336  MatroskaTrack *tracks = NULL;
3337  AVStream *st = s->streams[stream_index];
3338  int i, index, index_sub, index_min;
3339 
3340  /* Parse the CUES now since we need the index data to seek. */
3341  if (matroska->cues_parsing_deferred > 0) {
3342  matroska->cues_parsing_deferred = 0;
3343  matroska_parse_cues(matroska);
3344  }
3345 
3346  if (!st->nb_index_entries)
3347  goto err;
3348  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3349 
3350  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3351  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3352  SEEK_SET);
3353  matroska->current_id = 0;
3354  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3355  matroska_clear_queue(matroska);
3356  if (matroska_parse_cluster(matroska) < 0)
3357  break;
3358  }
3359  }
3360 
3361  matroska_clear_queue(matroska);
3362  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3363  goto err;
3364 
3365  index_min = index;
3366  tracks = matroska->tracks.elem;
3367  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3368  tracks[i].audio.pkt_cnt = 0;
3369  tracks[i].audio.sub_packet_cnt = 0;
3370  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3371  tracks[i].end_timecode = 0;
3372  if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3373  tracks[i].stream &&
3374  tracks[i].stream->discard != AVDISCARD_ALL) {
3375  index_sub = av_index_search_timestamp(
3376  tracks[i].stream, st->index_entries[index].timestamp,
3378  while (index_sub >= 0 &&
3379  index_min > 0 &&
3380  tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3381  st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3382  index_min--;
3383  }
3384  }
3385 
3386  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3387  matroska->current_id = 0;
3388  if (flags & AVSEEK_FLAG_ANY) {
3389  st->skip_to_keyframe = 0;
3390  matroska->skip_to_timecode = timestamp;
3391  } else {
3392  st->skip_to_keyframe = 1;
3393  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3394  }
3395  matroska->skip_to_keyframe = 1;
3396  matroska->done = 0;
3397  matroska->num_levels = 0;
3398  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3399  return 0;
3400 err:
3401  // slightly hackish but allows proper fallback to
3402  // the generic seeking code.
3403  matroska_clear_queue(matroska);
3404  matroska->current_id = 0;
3405  st->skip_to_keyframe =
3406  matroska->skip_to_keyframe = 0;
3407  matroska->done = 0;
3408  matroska->num_levels = 0;
3409  return -1;
3410 }
3411 
3413 {
3414  MatroskaDemuxContext *matroska = s->priv_data;
3415  MatroskaTrack *tracks = matroska->tracks.elem;
3416  int n;
3417 
3418  matroska_clear_queue(matroska);
3419 
3420  for (n = 0; n < matroska->tracks.nb_elem; n++)
3421  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3422  av_freep(&tracks[n].audio.buf);
3423  ebml_free(matroska_cluster, &matroska->current_cluster);
3424  ebml_free(matroska_segment, matroska);
3425 
3426  return 0;
3427 }
3428 
3429 typedef struct {
3430  int64_t start_time_ns;
3431  int64_t end_time_ns;
3432  int64_t start_offset;
3433  int64_t end_offset;
3434 } CueDesc;
3435 
3436 /* This function searches all the Cues and returns the CueDesc corresponding the
3437  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3438  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3439  */
3440 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3441  MatroskaDemuxContext *matroska = s->priv_data;
3442  CueDesc cue_desc;
3443  int i;
3444  int nb_index_entries = s->streams[0]->nb_index_entries;
3445  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3446  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3447  for (i = 1; i < nb_index_entries; i++) {
3448  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3449  index_entries[i].timestamp * matroska->time_scale > ts) {
3450  break;
3451  }
3452  }
3453  --i;
3454  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3455  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3456  if (i != nb_index_entries - 1) {
3457  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3458  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3459  } else {
3460  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3461  // FIXME: this needs special handling for files where Cues appear
3462  // before Clusters. the current logic assumes Cues appear after
3463  // Clusters.
3464  cue_desc.end_offset = cues_start - matroska->segment_start;
3465  }
3466  return cue_desc;
3467 }
3468 
3470 {
3471  MatroskaDemuxContext *matroska = s->priv_data;
3472  int64_t cluster_pos, before_pos;
3473  int index, rv = 1;
3474  if (s->streams[0]->nb_index_entries <= 0) return 0;
3475  // seek to the first cluster using cues.
3476  index = av_index_search_timestamp(s->streams[0], 0, 0);
3477  if (index < 0) return 0;
3478  cluster_pos = s->streams[0]->index_entries[index].pos;
3479  before_pos = avio_tell(s->pb);
3480  while (1) {
3481  int64_t cluster_id = 0, cluster_length = 0;
3482  AVPacket *pkt;
3483  avio_seek(s->pb, cluster_pos, SEEK_SET);
3484  // read cluster id and length
3485  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3486  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3487  if (cluster_id != 0xF43B675) { // done with all clusters
3488  break;
3489  }
3490  avio_seek(s->pb, cluster_pos, SEEK_SET);
3491  matroska->current_id = 0;
3492  matroska_clear_queue(matroska);
3493  if (matroska_parse_cluster(matroska) < 0 ||
3494  matroska->num_packets <= 0) {
3495  break;
3496  }
3497  pkt = matroska->packets[0];
3498  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3499  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3500  rv = 0;
3501  break;
3502  }
3503  }
3504  avio_seek(s->pb, before_pos, SEEK_SET);
3505  return rv;
3506 }
3507 
3508 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3509  double min_buffer, double* buffer,
3510  double* sec_to_download, AVFormatContext *s,
3511  int64_t cues_start)
3512 {
3513  double nano_seconds_per_second = 1000000000.0;
3514  double time_sec = time_ns / nano_seconds_per_second;
3515  int rv = 0;
3516  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3517  int64_t end_time_ns = time_ns + time_to_search_ns;
3518  double sec_downloaded = 0.0;
3519  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3520  if (desc_curr.start_time_ns == -1)
3521  return -1;
3522  *sec_to_download = 0.0;
3523 
3524  // Check for non cue start time.
3525  if (time_ns > desc_curr.start_time_ns) {
3526  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3527  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3528  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3529  double timeToDownload = (cueBytes * 8.0) / bps;
3530 
3531  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3532  *sec_to_download += timeToDownload;
3533 
3534  // Check if the search ends within the first cue.
3535  if (desc_curr.end_time_ns >= end_time_ns) {
3536  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3537  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3538  sec_downloaded = percent_to_sub * sec_downloaded;
3539  *sec_to_download = percent_to_sub * *sec_to_download;
3540  }
3541 
3542  if ((sec_downloaded + *buffer) <= min_buffer) {
3543  return 1;
3544  }
3545 
3546  // Get the next Cue.
3547  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3548  }
3549 
3550  while (desc_curr.start_time_ns != -1) {
3551  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3552  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3553  double desc_sec = desc_ns / nano_seconds_per_second;
3554  double bits = (desc_bytes * 8.0);
3555  double time_to_download = bits / bps;
3556 
3557  sec_downloaded += desc_sec - time_to_download;
3558  *sec_to_download += time_to_download;
3559 
3560  if (desc_curr.end_time_ns >= end_time_ns) {
3561  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3562  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3563  sec_downloaded = percent_to_sub * sec_downloaded;
3564  *sec_to_download = percent_to_sub * *sec_to_download;
3565 
3566  if ((sec_downloaded + *buffer) <= min_buffer)
3567  rv = 1;
3568  break;
3569  }
3570 
3571  if ((sec_downloaded + *buffer) <= min_buffer) {
3572  rv = 1;
3573  break;
3574  }
3575 
3576  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3577  }
3578  *buffer = *buffer + sec_downloaded;
3579  return rv;
3580 }
3581 
3582 /* This function computes the bandwidth of the WebM file with the help of
3583  * buffer_size_after_time_downloaded() function. Both of these functions are
3584  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3585  * Matroska parsing mechanism.
3586  *
3587  * Returns the bandwidth of the file on success; -1 on error.
3588  * */
3589 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3590 {
3591  MatroskaDemuxContext *matroska = s->priv_data;
3592  AVStream *st = s->streams[0];
3593  double bandwidth = 0.0;
3594  int i;
3595 
3596  for (i = 0; i < st->nb_index_entries; i++) {
3597  int64_t prebuffer_ns = 1000000000;
3598  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3599  double nano_seconds_per_second = 1000000000.0;
3600  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3601  double prebuffer_bytes = 0.0;
3602  int64_t temp_prebuffer_ns = prebuffer_ns;
3603  int64_t pre_bytes, pre_ns;
3604  double pre_sec, prebuffer, bits_per_second;
3605  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3606 
3607  // Start with the first Cue.
3608  CueDesc desc_end = desc_beg;
3609 
3610  // Figure out how much data we have downloaded for the prebuffer. This will
3611  // be used later to adjust the bits per sample to try.
3612  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3613  // Prebuffered the entire Cue.
3614  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3615  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3616  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3617  }
3618  if (desc_end.start_time_ns == -1) {
3619  // The prebuffer is larger than the duration.
3620  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3621  return -1;
3622  bits_per_second = 0.0;
3623  } else {
3624  // The prebuffer ends in the last Cue. Estimate how much data was
3625  // prebuffered.
3626  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3627  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3628  pre_sec = pre_ns / nano_seconds_per_second;
3629  prebuffer_bytes +=
3630  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3631 
3632  prebuffer = prebuffer_ns / nano_seconds_per_second;
3633 
3634  // Set this to 0.0 in case our prebuffer buffers the entire video.
3635  bits_per_second = 0.0;
3636  do {
3637  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3638  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3639  double desc_sec = desc_ns / nano_seconds_per_second;
3640  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3641 
3642  // Drop the bps by the percentage of bytes buffered.
3643  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3644  double mod_bits_per_second = calc_bits_per_second * percent;
3645 
3646  if (prebuffer < desc_sec) {
3647  double search_sec =
3648  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3649 
3650  // Add 1 so the bits per second should be a little bit greater than file
3651  // datarate.
3652  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3653  const double min_buffer = 0.0;
3654  double buffer = prebuffer;
3655  double sec_to_download = 0.0;
3656 
3657  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3658  min_buffer, &buffer, &sec_to_download,
3659  s, cues_start);
3660  if (rv < 0) {
3661  return -1;
3662  } else if (rv == 0) {
3663  bits_per_second = (double)(bps);
3664  break;
3665  }
3666  }
3667 
3668  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3669  } while (desc_end.start_time_ns != -1);
3670  }
3671  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3672  }
3673  return (int64_t)bandwidth;
3674 }
3675 
3677 {
3678  MatroskaDemuxContext *matroska = s->priv_data;
3679  EbmlList *seekhead_list = &matroska->seekhead;
3680  MatroskaSeekhead *seekhead = seekhead_list->elem;
3681  char *buf;
3682  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3683  int i;
3684 
3685  // determine cues start and end positions
3686  for (i = 0; i < seekhead_list->nb_elem; i++)
3687  if (seekhead[i].id == MATROSKA_ID_CUES)
3688  break;
3689 
3690  if (i >= seekhead_list->nb_elem) return -1;
3691 
3692  before_pos = avio_tell(matroska->ctx->pb);
3693  cues_start = seekhead[i].pos + matroska->segment_start;
3694  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3695  // cues_end is computed as cues_start + cues_length + length of the
3696  // Cues element ID + EBML length of the Cues element. cues_end is
3697  // inclusive and the above sum is reduced by 1.
3698  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3699  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3700  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3701  cues_end = cues_start + cues_length + bytes_read - 1;
3702  }
3703  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3704  if (cues_start == -1 || cues_end == -1) return -1;
3705 
3706  // parse the cues
3707  matroska_parse_cues(matroska);
3708 
3709  // cues start
3710  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3711 
3712  // cues end
3713  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3714 
3715  // bandwidth
3716  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3717  if (bandwidth < 0) return -1;
3718  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3719 
3720  // check if all clusters start with key frames
3722 
3723  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3724  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3725  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3726  if (!buf) return -1;
3727  strcpy(buf, "");
3728  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3729  snprintf(buf, (i + 1) * 20 * sizeof(char),
3730  "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3731  if (i != s->streams[0]->nb_index_entries - 1)
3732  strncat(buf, ",", sizeof(char));
3733  }
3734  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3735  av_free(buf);
3736 
3737  return 0;
3738 }
3739 
3741 {
3742  char *buf;
3743  int ret = matroska_read_header(s);
3744  MatroskaTrack *tracks;
3745  MatroskaDemuxContext *matroska = s->priv_data;
3746  if (ret) {
3747  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3748  return -1;
3749  }
3750 
3751  if (!matroska->is_live) {
3752  buf = av_asprintf("%g", matroska->duration);
3753  if (!buf) return AVERROR(ENOMEM);
3754  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3755  av_free(buf);
3756 
3757  // initialization range
3758  // 5 is the offset of Cluster ID.
3760  }
3761 
3762  // basename of the file
3763  buf = strrchr(s->filename, '/');
3764  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3765 
3766  // track number
3767  tracks = matroska->tracks.elem;
3768  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3769 
3770  // parse the cues and populate Cue related fields
3771  return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3772 }
3773 
3775 {
3776  return AVERROR_EOF;
3777 }
3778 
3779 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3780 static const AVOption options[] = {
3781  { "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 },
3782  { NULL },
3783 };
3784 
3785 static const AVClass webm_dash_class = {
3786  .class_name = "WebM DASH Manifest demuxer",
3787  .item_name = av_default_item_name,
3788  .option = options,
3789  .version = LIBAVUTIL_VERSION_INT,
3790 };
3791 
3793  .name = "matroska,webm",
3794  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3795  .extensions = "mkv,mk3d,mka,mks",
3796  .priv_data_size = sizeof(MatroskaDemuxContext),
3802  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3803 };
3804 
3806  .name = "webm_dash_manifest",
3807  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3808  .priv_data_size = sizeof(MatroskaDemuxContext),
3812  .priv_class = &webm_dash_class,
3813 };
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
MatroskaTrackVideoColor color
Definition: matroskadec.c:175
const char * s
Definition: matroskadec.c:93
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:222
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2378
#define AV_DISPOSITION_METADATA
Definition: avformat.h:865
#define NULL
Definition: coverity.c:32
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:223
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4050
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:446
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:2703
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4057
#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:147
static const EbmlSyntax matroska_blockgroup[]
Definition: matroskadec.c:672
uint64_t seek_preroll
Definition: matroskadec.c:216
enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
static int mkv_field_order(int64_t field_order)
Definition: matroskadec.c:1753
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:603
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1475
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1512
uint64_t type
Definition: matroskadec.c:207
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:531
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:3774
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2539
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:110
AVOption.
Definition: opt.h:245
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:145
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:3792
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:1945
enum AVCodecID id
Definition: mxfenc.c:104
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:383
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:185
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3002
#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:203
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:771
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define INITIALIZATION_RANGE
Definition: matroska.h:334
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1620
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:992
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3469
else temp
Definition: vf_mcdeint.c:259
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:613
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:4549
int64_t pos
Definition: avformat.h:818
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:166
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:160
uint64_t chapteruid
Definition: matroskadec.c:273
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:426
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2380
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:362
EbmlList tag
Definition: matroskadec.c:279
uint64_t uid
Definition: matroskadec.c:206
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
MatroskaCluster current_cluster
Definition: matroskadec.c:348
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:2976
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3969
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:948
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:207
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:882
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:218
const char * b
Definition: vf_curves.c:113
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:239
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1079
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:230
uint64_t flag_forced
Definition: matroskadec.c:215
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:206
uint64_t flag_default
Definition: matroskadec.c:214
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:145
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:125
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:480
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:161
char * name
Definition: matroskadec.c:262
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
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:3118
int version
Definition: avisynth_c.h:766
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
discard all
Definition: avcodec.h:786
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:309
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:189
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:153
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:742
MatroskaTrackAudio audio
Definition: matroskadec.c:218
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:135
uint64_t duration
Definition: matroskadec.c:358
const struct EbmlSyntax * n
Definition: matroskadec.c:94
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:253
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:217
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1614
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:173
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:246
enum AVColorSpace color_space
Definition: avcodec.h:4058
static const EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:485
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
int frame_size
Audio only.
Definition: avcodec.h:4090
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1538
#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:4306
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:236
Format I/O context.
Definition: avformat.h:1330
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:265
UID uid
Definition: mxfenc.c:1821
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:1859
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:684
#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:225
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3740
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:872
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1443
Public dictionary API.
int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
Set a dictionary value to an ISO-8601 compliant timestamp string.
Definition: dict.c:258
int ffio_limit(AVIOContext *s, int size)
Definition: utils.c:226
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:578
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1088
uint64_t pixel_height
Definition: matroskadec.c:169
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:346
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:149
#define MATROSKA_ID_CHAPLANG
Definition: matroska.h:249
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:173
MatroskaTrackOperation operation
Definition: matroskadec.c:219
MatroskaTrackVideo video
Definition: matroskadec.c:217
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:254
int width
Video only.
Definition: avcodec.h:4035
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3440
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:3676
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:72
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
uint64_t time
Definition: matroskadec.c:257
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:1618
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
static const EbmlSyntax matroska_track_video_color[]
Definition: matroskadec.c:408
#define TRACK_NUMBER
Definition: matroska.h:342
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1682
enum AVStreamParseType need_parsing
Definition: avformat.h:1068
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:134
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:225
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:204
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:252
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:644
AVStream * stream
Definition: matroskadec.c:239
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4182
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:211
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:222
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:1398
int64_t duration
Definition: movenc.c:63
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:190
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:158
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:127
int initial_padding
Audio only.
Definition: avcodec.h:4098
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:656
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:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1441
uint8_t * data
Definition: avcodec.h:1600
uint64_t typevalue
Definition: matroskadec.c:271
uint64_t codec_delay
Definition: matroskadec.c:221
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3229
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:251
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:221
uint32_t tag
Definition: movenc.c:1377
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:598
int64_t start_time_ns
Definition: matroskadec.c:3430
union EbmlSyntax::@208 def
#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:171
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:322
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:1798
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:824
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
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 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:152
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4071
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:604
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:863
EbmlList sub
Definition: matroskadec.c:266
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1540
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3998
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2897
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1632
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3287
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1044
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:192
#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:164
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition: matroska.h:123
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:825
#define FILENAME
Definition: matroska.h:337
EbmlType type
Definition: matroskadec.c:87
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#define MATROSKA_ID_VIDEOCOLOR_BY
Definition: matroska.h:150
#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:1546
#define MATROSKA_ID_BLOCKDURATION
Definition: matroska.h:229
int64_t end_offset
Definition: matroskadec.c:3433
#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:2054
#define MATROSKA_ID_VIDEOCOLORMAXCLL
Definition: matroska.h:141
MatroskaMasteringMeta mastering_meta
Definition: matroskadec.c:161
#define MATROSKA_ID_VIDEOCOLOR_WHITEX
Definition: matroska.h:151
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:840
av_default_item_name
AVChapter * chapter
Definition: matroskadec.c:248
#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:819
#define MATROSKA_ID_CLUSTER
Definition: matroska.h:62
#define MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT
Definition: matroska.h:136
#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:4056
#define MATROSKA_ID_FILEMIMETYPE
Definition: matroska.h:238
static const EbmlSyntax matroska_track_encoding[]
Definition: matroskadec.c:471
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, uint64_t *num)
Definition: matroskadec.c:981
const char * r
Definition: vf_curves.c:111
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:3093
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
EbmlBin additional
Definition: matroskadec.c:363
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:203
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3965
#define MATROSKA_ID_TAGDEFAULT_BUG
Definition: matroska.h:201
enum AVCodecID id
Definition: matroska.h:318
#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:169
#define EBML_ID_EBMLMAXIDLENGTH
Definition: matroska.h:38
#define MATROSKA_ID_CHAPTERFLAGHIDDEN
Definition: matroska.h:256
static const EbmlSyntax matroska_index_entry[]
Definition: matroskadec.c:592
static const EbmlSyntax matroska_chapter_entry[]
Definition: matroskadec.c:557
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:959
uint64_t timecode
Definition: matroskadec.c:293
#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:82
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1606
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3987
Only parse headers, do not repack.
Definition: avformat.h:809
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:595
static void ebml_free(EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1215
const CodecMime ff_mkv_mime_tags[]
Definition: matroska.c:111
int nb_elem
Definition: matroskadec.c:99
#define MATROSKA_ID_TAG
Definition: matroska.h:195
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:464
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:463
char * lang
Definition: matroskadec.c:264
static const EbmlSyntax matroska_seekhead_entry[]
Definition: matroskadec.c:633
#define AV_DISPOSITION_FORCED
Track should be used during playback by default.
Definition: avformat.h:846
#define MATROSKA_ID_ENCODINGSIGHASHALGO
Definition: matroska.h:176
static const struct TransferCharacteristics transfer_characteristics[AVCOL_TRC_NB]
uint64_t skip_to_timecode
Definition: matroskadec.c:337
Definition: dct.c:52
int block_align
Audio only.
Definition: avcodec.h:4086
static int matroska_read_header(AVFormatContext *s)
Definition: matroskadec.c:2381
static void matroska_parse_cues(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1652
static const EbmlSyntax matroska_mastering_meta[]
Definition: matroskadec.c:394
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:1585
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN
Definition: matroska.h:154
#define dynarray_add(tab, nb_ptr, elem)
Definition: internal.h:173
uint64_t start
Definition: matroskadec.c:243
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:3165
#define EBML_ID_EBMLVERSION
Definition: matroska.h:36
char filename[1024]
input or output filename
Definition: avformat.h:1406
#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:248
static const EbmlSyntax matroska_clusters[]
Definition: matroskadec.c:693
#define FFMIN(a, b)
Definition: common.h:96
#define MATROSKA_ID_TAGTARGETS
Definition: matroska.h:202
#define MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL
Definition: matroska.h:130
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
AVPacket ** packets
Definition: matroskadec.c:329
#define MATROSKA_VIDEO_STEREO_PLANE_COUNT
Definition: matroska.h:324
uint8_t interlaced
Definition: mxfenc.c:1824
#define MATROSKA_ID_TAGNAME
Definition: matroska.h:197
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:1123
static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb, int max_size, uint64_t *number)
Definition: matroskadec.c:794
static const EbmlSyntax matroska_track_combine_planes[]
Definition: matroskadec.c:491
#define MATROSKA_ID_CHAPTERFLAGENABLED
Definition: matroska.h:257
uint64_t id_length
Definition: matroskadec.c:112
static MatroskaTrack * matroska_find_track_by_num(MatroskaDemuxContext *matroska, int num)
Definition: matroskadec.c:1290
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:150
#define CLUSTER_KEYFRAME
Definition: matroska.h:340
#define MATROSKA_ID_SIMPLETAG
Definition: matroska.h:196
uint64_t doctype_version
Definition: matroskadec.c:114
internal header for RIFF based (de)muxers do NOT include this in end user applications ...