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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 #include "libavutil/spherical.h"
47 
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
51 
52 #include "avformat.h"
53 #include "avio_internal.h"
54 #include "internal.h"
55 #include "isom.h"
56 #include "matroska.h"
57 #include "oggdec.h"
58 /* For ff_codec_get_id(). */
59 #include "riff.h"
60 #include "rmsipr.h"
61 
62 #if CONFIG_BZLIB
63 #include <bzlib.h>
64 #endif
65 #if CONFIG_ZLIB
66 #include <zlib.h>
67 #endif
68 
69 #include "qtpalette.h"
70 
71 typedef enum {
84 } EbmlType;
85 
86 typedef const struct EbmlSyntax {
87  uint32_t id;
91  union {
92  int64_t i;
93  uint64_t u;
94  double f;
95  const char *s;
96  const struct EbmlSyntax *n;
97  } def;
98 } EbmlSyntax;
99 
100 typedef struct EbmlList {
101  int nb_elem;
102  void *elem;
103 } EbmlList;
104 
105 typedef struct EbmlBin {
106  int size;
109  int64_t pos;
110 } EbmlBin;
111 
112 typedef struct Ebml {
113  uint64_t version;
114  uint64_t max_size;
115  uint64_t id_length;
116  char *doctype;
117  uint64_t doctype_version;
118 } Ebml;
119 
120 typedef struct MatroskaTrackCompression {
121  uint64_t algo;
124 
125 typedef struct MatroskaTrackEncryption {
126  uint64_t algo;
129 
130 typedef struct MatroskaTrackEncoding {
131  uint64_t scope;
132  uint64_t type;
136 
137 typedef struct MatroskaMasteringMeta {
138  double r_x;
139  double r_y;
140  double g_x;
141  double g_y;
142  double b_x;
143  double b_y;
144  double white_x;
145  double white_y;
149 
150 typedef struct MatroskaTrackVideoColor {
153  uint64_t chroma_sub_horz;
154  uint64_t chroma_sub_vert;
155  uint64_t cb_sub_horz;
156  uint64_t cb_sub_vert;
159  uint64_t range;
161  uint64_t primaries;
162  uint64_t max_cll;
163  uint64_t max_fall;
166 
168  uint64_t type;
169  EbmlBin private;
170  double yaw;
171  double pitch;
172  double roll;
174 
175 typedef struct MatroskaTrackVideo {
176  double frame_rate;
177  uint64_t display_width;
178  uint64_t display_height;
179  uint64_t pixel_width;
180  uint64_t pixel_height;
182  uint64_t display_unit;
183  uint64_t interlaced;
184  uint64_t field_order;
185  uint64_t stereo_mode;
186  uint64_t alpha_mode;
190 
191 typedef struct MatroskaTrackAudio {
192  double samplerate;
194  uint64_t bitdepth;
195  uint64_t channels;
196 
197  /* real audio header (extracted from extradata) */
203  int pkt_cnt;
204  uint64_t buf_timecode;
207 
208 typedef struct MatroskaTrackPlane {
209  uint64_t uid;
210  uint64_t type;
212 
213 typedef struct MatroskaTrackOperation {
216 
217 typedef struct MatroskaTrack {
218  uint64_t num;
219  uint64_t uid;
220  uint64_t type;
221  char *name;
222  char *codec_id;
224  char *language;
225  double time_scale;
227  uint64_t flag_default;
228  uint64_t flag_forced;
229  uint64_t seek_preroll;
234  uint64_t codec_delay;
236 
238  int64_t end_timecode;
241 
244 } MatroskaTrack;
245 
246 typedef struct MatroskaAttachment {
247  uint64_t uid;
248  char *filename;
249  char *mime;
251 
254 
255 typedef struct MatroskaChapter {
256  uint64_t start;
257  uint64_t end;
258  uint64_t uid;
259  char *title;
260 
263 
264 typedef struct MatroskaIndexPos {
265  uint64_t track;
266  uint64_t pos;
268 
269 typedef struct MatroskaIndex {
270  uint64_t time;
272 } MatroskaIndex;
273 
274 typedef struct MatroskaTag {
275  char *name;
276  char *string;
277  char *lang;
278  uint64_t def;
280 } MatroskaTag;
281 
282 typedef struct MatroskaTagTarget {
283  char *type;
284  uint64_t typevalue;
285  uint64_t trackuid;
286  uint64_t chapteruid;
287  uint64_t attachuid;
289 
290 typedef struct MatroskaTags {
293 } MatroskaTags;
294 
295 typedef struct MatroskaSeekhead {
296  uint64_t id;
297  uint64_t pos;
299 
300 typedef struct MatroskaLevel {
301  uint64_t start;
302  uint64_t length;
303 } MatroskaLevel;
304 
305 typedef struct MatroskaCluster {
306  uint64_t timecode;
309 
310 typedef struct MatroskaLevel1Element {
311  uint64_t id;
312  uint64_t pos;
313  int parsed;
315 
316 typedef struct MatroskaDemuxContext {
317  const AVClass *class;
319 
320  /* EBML stuff */
323  int level_up;
324  uint32_t current_id;
325 
326  uint64_t time_scale;
327  double duration;
328  char *title;
329  char *muxingapp;
337 
338  /* byte position of the segment inside the stream */
339  int64_t segment_start;
340 
341  /* the packet queue */
344 
345  int done;
346 
347  /* What to skip before effectively reading a packet. */
350 
351  /* File has a CUES element, but we defer parsing until it is needed. */
353 
354  /* Level1 elements and whether they were read yet */
357 
361 
362  /* File has SSA subtitles which prevent incremental cluster parsing. */
364 
365  /* WebM DASH Manifest live flag */
366  int is_live;
367 
368  /* Bandwidth value for WebM DASH Manifest */
371 
372 typedef struct MatroskaBlock {
373  uint64_t duration;
374  int64_t reference;
375  uint64_t non_simple;
377  uint64_t additional_id;
380 } MatroskaBlock;
381 
382 static const EbmlSyntax ebml_header[] = {
383  { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
384  { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
385  { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
386  { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
387  { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
390  { 0 }
391 };
392 
393 static const EbmlSyntax ebml_syntax[] = {
394  { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
395  { 0 }
396 };
397 
398 static const EbmlSyntax matroska_info[] = {
399  { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
401  { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
403  { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
404  { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
406  { 0 }
407 };
408 
410  { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
411  { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
412  { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
413  { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
414  { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
415  { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
416  { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
417  { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
418  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
419  { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
420  { 0 }
421 };
422 
424  { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
425  { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
426  { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
427  { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
428  { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
429  { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
435  { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
436  { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
437  { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
438  { 0 }
439 };
440 
447  { 0 }
448 };
449 
451  { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
452  { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
453  { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
454  { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
455  { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
456  { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
457  { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
458  { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
459  { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
469  { 0 }
470 };
471 
473  { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
474  { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
475  { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
476  { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
477  { 0 }
478 };
479 
483  { 0 }
484 };
485 
494  { 0 }
495 };
497  { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
498  { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
499  { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
500  { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
502  { 0 }
503 };
504 
506  { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
507  { 0 }
508 };
509 
513  { 0 }
514 };
515 
517  { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
518  { 0 }
519 };
520 
522  { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
523  { 0 }
524 };
525 
526 static const EbmlSyntax matroska_track[] = {
527  { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
529  { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
532  { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
533  { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
534  { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
535  { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
536  { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
537  { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
538  { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
539  { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
540  { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
541  { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
542  { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
543  { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
544  { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
553  { 0 }
554 };
555 
556 static const EbmlSyntax matroska_tracks[] = {
557  { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
558  { 0 }
559 };
560 
561 static const EbmlSyntax matroska_attachment[] = {
563  { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
564  { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
565  { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
567  { 0 }
568 };
569 
571  { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
572  { 0 }
573 };
574 
576  { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
579  { 0 }
580 };
581 
586  { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
591  { 0 }
592 };
593 
594 static const EbmlSyntax matroska_chapter[] = {
595  { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
600  { 0 }
601 };
602 
603 static const EbmlSyntax matroska_chapters[] = {
604  { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
605  { 0 }
606 };
607 
608 static const EbmlSyntax matroska_index_pos[] = {
609  { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
614  { 0 }
615 };
616 
618  { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
619  { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
620  { 0 }
621 };
622 
623 static const EbmlSyntax matroska_index[] = {
624  { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
625  { 0 }
626 };
627 
628 static const EbmlSyntax matroska_simpletag[] = {
629  { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
630  { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
631  { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
632  { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
633  { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
634  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
635  { 0 }
636 };
637 
638 static const EbmlSyntax matroska_tagtargets[] = {
640  { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
641  { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
642  { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
643  { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
644  { 0 }
645 };
646 
647 static const EbmlSyntax matroska_tag[] = {
648  { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
649  { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
650  { 0 }
651 };
652 
653 static const EbmlSyntax matroska_tags[] = {
654  { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
655  { 0 }
656 };
657 
659  { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
660  { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
661  { 0 }
662 };
663 
664 static const EbmlSyntax matroska_seekhead[] = {
665  { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
666  { 0 }
667 };
668 
669 static const EbmlSyntax matroska_segment[] = {
670  { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
671  { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
672  { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
673  { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
674  { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
675  { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
676  { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
678  { 0 }
679 };
680 
681 static const EbmlSyntax matroska_segments[] = {
682  { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
683  { 0 }
684 };
685 
686 static const EbmlSyntax matroska_blockmore[] = {
687  { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
688  { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
689  { 0 }
690 };
691 
693  { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
694  { 0 }
695 };
696 
697 static const EbmlSyntax matroska_blockgroup[] = {
698  { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
699  { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
700  { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
702  { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
703  { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
705  { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706  { 0 }
707 };
708 
709 static const EbmlSyntax matroska_cluster[] = {
710  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
711  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
712  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
715  { 0 }
716 };
717 
718 static const EbmlSyntax matroska_clusters[] = {
719  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
724  { 0 }
725 };
726 
728  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
729  { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
730  { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
738  { 0 }
739 };
740 
742  { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
747  { 0 }
748 };
749 
751  { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
756  { 0 }
757 };
758 
759 static const char *const matroska_doctypes[] = { "matroska", "webm" };
760 
762 
763 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
764 {
765  AVIOContext *pb = matroska->ctx->pb;
766  int64_t ret;
767  uint32_t id;
768  matroska->current_id = 0;
769  matroska->num_levels = 0;
770 
771  /* seek to next position to resync from */
772  if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
773  matroska->done = 1;
774  return ret;
775  }
776 
777  id = avio_rb32(pb);
778 
779  // try to find a toplevel element
780  while (!avio_feof(pb)) {
781  if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
782  id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
784  id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
785  matroska->current_id = id;
786  return 0;
787  }
788  id = (id << 8) | avio_r8(pb);
789  }
790 
791  matroska->done = 1;
792  return AVERROR_EOF;
793 }
794 
795 /*
796  * Return: Whether we reached the end of a level in the hierarchy or not.
797  */
799 {
800  AVIOContext *pb = matroska->ctx->pb;
801  int64_t pos = avio_tell(pb);
802 
803  if (matroska->num_levels > 0) {
804  MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
805  if (pos - level->start >= level->length || matroska->current_id) {
806  matroska->num_levels--;
807  return 1;
808  }
809  }
810  return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
811 }
812 
813 /*
814  * Read: an "EBML number", which is defined as a variable-length
815  * array of bytes. The first byte indicates the length by giving a
816  * number of 0-bits followed by a one. The position of the first
817  * "one" bit inside the first byte indicates the length of this
818  * number.
819  * Returns: number of bytes read, < 0 on error
820  */
822  int max_size, uint64_t *number)
823 {
824  int read = 1, n = 1;
825  uint64_t total = 0;
826 
827  /* The first byte tells us the length in bytes - avio_r8() can normally
828  * return 0, but since that's not a valid first ebmlID byte, we can
829  * use it safely here to catch EOS. */
830  if (!(total = avio_r8(pb))) {
831  /* we might encounter EOS here */
832  if (!avio_feof(pb)) {
833  int64_t pos = avio_tell(pb);
834  av_log(matroska->ctx, AV_LOG_ERROR,
835  "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
836  pos, pos);
837  return pb->error ? pb->error : AVERROR(EIO);
838  }
839  return AVERROR_EOF;
840  }
841 
842  /* get the length of the EBML number */
843  read = 8 - ff_log2_tab[total];
844  if (read > max_size) {
845  int64_t pos = avio_tell(pb) - 1;
846  av_log(matroska->ctx, AV_LOG_ERROR,
847  "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
848  (uint8_t) total, pos, pos);
849  return AVERROR_INVALIDDATA;
850  }
851 
852  /* read out length */
853  total ^= 1 << ff_log2_tab[total];
854  while (n++ < read)
855  total = (total << 8) | avio_r8(pb);
856 
857  *number = total;
858 
859  return read;
860 }
861 
862 /**
863  * Read a EBML length value.
864  * This needs special handling for the "unknown length" case which has multiple
865  * encodings.
866  */
868  uint64_t *number)
869 {
870  int res = ebml_read_num(matroska, pb, 8, number);
871  if (res > 0 && *number + 1 == 1ULL << (7 * res))
872  *number = 0xffffffffffffffULL;
873  return res;
874 }
875 
876 /*
877  * Read the next element as an unsigned int.
878  * 0 is success, < 0 is failure.
879  */
880 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
881 {
882  int n = 0;
883 
884  if (size > 8)
885  return AVERROR_INVALIDDATA;
886 
887  /* big-endian ordering; build up number */
888  *num = 0;
889  while (n++ < size)
890  *num = (*num << 8) | avio_r8(pb);
891 
892  return 0;
893 }
894 
895 /*
896  * Read the next element as a signed int.
897  * 0 is success, < 0 is failure.
898  */
899 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
900 {
901  int n = 1;
902 
903  if (size > 8)
904  return AVERROR_INVALIDDATA;
905 
906  if (size == 0) {
907  *num = 0;
908  } else {
909  *num = sign_extend(avio_r8(pb), 8);
910 
911  /* big-endian ordering; build up number */
912  while (n++ < size)
913  *num = ((uint64_t)*num << 8) | avio_r8(pb);
914  }
915 
916  return 0;
917 }
918 
919 /*
920  * Read the next element as a float.
921  * 0 is success, < 0 is failure.
922  */
923 static int ebml_read_float(AVIOContext *pb, int size, double *num)
924 {
925  if (size == 0)
926  *num = 0;
927  else if (size == 4)
928  *num = av_int2float(avio_rb32(pb));
929  else if (size == 8)
930  *num = av_int2double(avio_rb64(pb));
931  else
932  return AVERROR_INVALIDDATA;
933 
934  return 0;
935 }
936 
937 /*
938  * Read the next element as an ASCII string.
939  * 0 is success, < 0 is failure.
940  */
941 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
942 {
943  char *res;
944 
945  /* EBML strings are usually not 0-terminated, so we allocate one
946  * byte more, read the string and NULL-terminate it ourselves. */
947  if (!(res = av_malloc(size + 1)))
948  return AVERROR(ENOMEM);
949  if (avio_read(pb, (uint8_t *) res, size) != size) {
950  av_free(res);
951  return AVERROR(EIO);
952  }
953  (res)[size] = '\0';
954  av_free(*str);
955  *str = res;
956 
957  return 0;
958 }
959 
960 /*
961  * Read the next element as binary data.
962  * 0 is success, < 0 is failure.
963  */
964 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
965 {
966  int ret;
967 
968  ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
969  if (ret < 0)
970  return ret;
971  memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
972 
973  bin->data = bin->buf->data;
974  bin->size = length;
975  bin->pos = avio_tell(pb);
976  if (avio_read(pb, bin->data, length) != length) {
977  av_buffer_unref(&bin->buf);
978  bin->data = NULL;
979  bin->size = 0;
980  return AVERROR(EIO);
981  }
982 
983  return 0;
984 }
985 
986 /*
987  * Read the next element, but only the header. The contents
988  * are supposed to be sub-elements which can be read separately.
989  * 0 is success, < 0 is failure.
990  */
991 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
992 {
993  AVIOContext *pb = matroska->ctx->pb;
995 
996  if (matroska->num_levels >= EBML_MAX_DEPTH) {
997  av_log(matroska->ctx, AV_LOG_ERROR,
998  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
999  return AVERROR(ENOSYS);
1000  }
1001 
1002  level = &matroska->levels[matroska->num_levels++];
1003  level->start = avio_tell(pb);
1004  level->length = length;
1005 
1006  return 0;
1007 }
1008 
1009 /*
1010  * Read signed/unsigned "EBML" numbers.
1011  * Return: number of bytes processed, < 0 on error
1012  */
1014  uint8_t *data, uint32_t size, uint64_t *num)
1015 {
1016  AVIOContext pb;
1017  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1018  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1019 }
1020 
1021 /*
1022  * Same as above, but signed.
1023  */
1025  uint8_t *data, uint32_t size, int64_t *num)
1026 {
1027  uint64_t unum;
1028  int res;
1029 
1030  /* read as unsigned number first */
1031  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1032  return res;
1033 
1034  /* make signed (weird way) */
1035  *num = unum - ((1LL << (7 * res - 1)) - 1);
1036 
1037  return res;
1038 }
1039 
1040 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1041  EbmlSyntax *syntax, void *data);
1042 
1043 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1044  uint32_t id, void *data)
1045 {
1046  int i;
1047  for (i = 0; syntax[i].id; i++)
1048  if (id == syntax[i].id)
1049  break;
1050  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1051  matroska->num_levels > 0 &&
1052  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1053  return 0; // we reached the end of an unknown size cluster
1054  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1055  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1056  }
1057  return ebml_parse_elem(matroska, &syntax[i], data);
1058 }
1059 
1060 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1061  void *data)
1062 {
1063  if (!matroska->current_id) {
1064  uint64_t id;
1065  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1066  if (res < 0) {
1067  // in live mode, finish parsing if EOF is reached.
1068  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1069  res == AVERROR_EOF) ? 1 : res;
1070  }
1071  matroska->current_id = id | 1 << 7 * res;
1072  }
1073  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1074 }
1075 
1076 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1077  void *data)
1078 {
1079  int i, res = 0;
1080 
1081  for (i = 0; syntax[i].id; i++)
1082  switch (syntax[i].type) {
1083  case EBML_SINT:
1084  *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1085  break;
1086  case EBML_UINT:
1087  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1088  break;
1089  case EBML_FLOAT:
1090  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1091  break;
1092  case EBML_STR:
1093  case EBML_UTF8:
1094  // the default may be NULL
1095  if (syntax[i].def.s) {
1096  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1097  *dst = av_strdup(syntax[i].def.s);
1098  if (!*dst)
1099  return AVERROR(ENOMEM);
1100  }
1101  break;
1102  }
1103 
1104  while (!res && !ebml_level_end(matroska))
1105  res = ebml_parse(matroska, syntax, data);
1106 
1107  return res;
1108 }
1109 
1110 static int is_ebml_id_valid(uint32_t id)
1111 {
1112  // Due to endian nonsense in Matroska, the highest byte with any bits set
1113  // will contain the leading length bit. This bit in turn identifies the
1114  // total byte length of the element by its position within the byte.
1115  unsigned int bits = av_log2(id);
1116  return id && (bits + 7) / 8 == (8 - bits % 8);
1117 }
1118 
1119 /*
1120  * Allocate and return the entry for the level1 element with the given ID. If
1121  * an entry already exists, return the existing entry.
1122  */
1124  uint32_t id)
1125 {
1126  int i;
1127  MatroskaLevel1Element *elem;
1128 
1129  if (!is_ebml_id_valid(id))
1130  return NULL;
1131 
1132  // Some files link to all clusters; useless.
1133  if (id == MATROSKA_ID_CLUSTER)
1134  return NULL;
1135 
1136  // There can be multiple seekheads.
1137  if (id != MATROSKA_ID_SEEKHEAD) {
1138  for (i = 0; i < matroska->num_level1_elems; i++) {
1139  if (matroska->level1_elems[i].id == id)
1140  return &matroska->level1_elems[i];
1141  }
1142  }
1143 
1144  // Only a completely broken file would have more elements.
1145  // It also provides a low-effort way to escape from circular seekheads
1146  // (every iteration will add a level1 entry).
1147  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1148  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1149  return NULL;
1150  }
1151 
1152  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1153  *elem = (MatroskaLevel1Element){.id = id};
1154 
1155  return elem;
1156 }
1157 
1159  EbmlSyntax *syntax, void *data)
1160 {
1161  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1162  [EBML_UINT] = 8,
1163  [EBML_FLOAT] = 8,
1164  // max. 16 MB for strings
1165  [EBML_STR] = 0x1000000,
1166  [EBML_UTF8] = 0x1000000,
1167  // max. 256 MB for binary data
1168  [EBML_BIN] = 0x10000000,
1169  // no limits for anything else
1170  };
1171  AVIOContext *pb = matroska->ctx->pb;
1172  uint32_t id = syntax->id;
1173  uint64_t length;
1174  int res;
1175  void *newelem;
1176  MatroskaLevel1Element *level1_elem;
1177 
1178  data = (char *) data + syntax->data_offset;
1179  if (syntax->list_elem_size) {
1180  EbmlList *list = data;
1181  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1182  if (!newelem)
1183  return AVERROR(ENOMEM);
1184  list->elem = newelem;
1185  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1186  memset(data, 0, syntax->list_elem_size);
1187  list->nb_elem++;
1188  }
1189 
1190  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1191  matroska->current_id = 0;
1192  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1193  return res;
1194  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1195  av_log(matroska->ctx, AV_LOG_ERROR,
1196  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1197  length, max_lengths[syntax->type], syntax->type);
1198  return AVERROR_INVALIDDATA;
1199  }
1200  }
1201 
1202  switch (syntax->type) {
1203  case EBML_UINT:
1204  res = ebml_read_uint(pb, length, data);
1205  break;
1206  case EBML_SINT:
1207  res = ebml_read_sint(pb, length, data);
1208  break;
1209  case EBML_FLOAT:
1210  res = ebml_read_float(pb, length, data);
1211  break;
1212  case EBML_STR:
1213  case EBML_UTF8:
1214  res = ebml_read_ascii(pb, length, data);
1215  break;
1216  case EBML_BIN:
1217  res = ebml_read_binary(pb, length, data);
1218  break;
1219  case EBML_LEVEL1:
1220  case EBML_NEST:
1221  if ((res = ebml_read_master(matroska, length)) < 0)
1222  return res;
1223  if (id == MATROSKA_ID_SEGMENT)
1224  matroska->segment_start = avio_tell(matroska->ctx->pb);
1225  if (id == MATROSKA_ID_CUES)
1226  matroska->cues_parsing_deferred = 0;
1227  if (syntax->type == EBML_LEVEL1 &&
1228  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1229  if (level1_elem->parsed)
1230  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1231  level1_elem->parsed = 1;
1232  }
1233  return ebml_parse_nest(matroska, syntax->def.n, data);
1234  case EBML_PASS:
1235  return ebml_parse_id(matroska, syntax->def.n, id, data);
1236  case EBML_STOP:
1237  return 1;
1238  default:
1239  if (ffio_limit(pb, length) != length)
1240  return AVERROR(EIO);
1241  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1242  }
1243  if (res == AVERROR_INVALIDDATA)
1244  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1245  else if (res == AVERROR(EIO))
1246  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1247  return res;
1248 }
1249 
1250 static void ebml_free(EbmlSyntax *syntax, void *data)
1251 {
1252  int i, j;
1253  for (i = 0; syntax[i].id; i++) {
1254  void *data_off = (char *) data + syntax[i].data_offset;
1255  switch (syntax[i].type) {
1256  case EBML_STR:
1257  case EBML_UTF8:
1258  av_freep(data_off);
1259  break;
1260  case EBML_BIN:
1261  av_buffer_unref(&((EbmlBin *) data_off)->buf);
1262  break;
1263  case EBML_LEVEL1:
1264  case EBML_NEST:
1265  if (syntax[i].list_elem_size) {
1266  EbmlList *list = data_off;
1267  char *ptr = list->elem;
1268  for (j = 0; j < list->nb_elem;
1269  j++, ptr += syntax[i].list_elem_size)
1270  ebml_free(syntax[i].def.n, ptr);
1271  av_freep(&list->elem);
1272  list->nb_elem = 0;
1273  } else
1274  ebml_free(syntax[i].def.n, data_off);
1275  default:
1276  break;
1277  }
1278  }
1279 }
1280 
1281 /*
1282  * Autodetecting...
1283  */
1285 {
1286  uint64_t total = 0;
1287  int len_mask = 0x80, size = 1, n = 1, i;
1288 
1289  /* EBML header? */
1290  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1291  return 0;
1292 
1293  /* length of header */
1294  total = p->buf[4];
1295  while (size <= 8 && !(total & len_mask)) {
1296  size++;
1297  len_mask >>= 1;
1298  }
1299  if (size > 8)
1300  return 0;
1301  total &= (len_mask - 1);
1302  while (n < size)
1303  total = (total << 8) | p->buf[4 + n++];
1304 
1305  /* Does the probe data contain the whole header? */
1306  if (p->buf_size < 4 + size + total)
1307  return 0;
1308 
1309  /* The header should contain a known document type. For now,
1310  * we don't parse the whole header but simply check for the
1311  * availability of that array of characters inside the header.
1312  * Not fully fool-proof, but good enough. */
1313  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1314  size_t probelen = strlen(matroska_doctypes[i]);
1315  if (total < probelen)
1316  continue;
1317  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1318  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1319  return AVPROBE_SCORE_MAX;
1320  }
1321 
1322  // probably valid EBML header but no recognized doctype
1323  return AVPROBE_SCORE_EXTENSION;
1324 }
1325 
1327  int num)
1328 {
1329  MatroskaTrack *tracks = matroska->tracks.elem;
1330  int i;
1331 
1332  for (i = 0; i < matroska->tracks.nb_elem; i++)
1333  if (tracks[i].num == num)
1334  return &tracks[i];
1335 
1336  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1337  return NULL;
1338 }
1339 
1340 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1341  MatroskaTrack *track)
1342 {
1343  MatroskaTrackEncoding *encodings = track->encodings.elem;
1344  uint8_t *data = *buf;
1345  int isize = *buf_size;
1346  uint8_t *pkt_data = NULL;
1347  uint8_t av_unused *newpktdata;
1348  int pkt_size = isize;
1349  int result = 0;
1350  int olen;
1351 
1352  if (pkt_size >= 10000000U)
1353  return AVERROR_INVALIDDATA;
1354 
1355  switch (encodings[0].compression.algo) {
1357  {
1358  int header_size = encodings[0].compression.settings.size;
1359  uint8_t *header = encodings[0].compression.settings.data;
1360 
1361  if (header_size && !header) {
1362  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1363  return -1;
1364  }
1365 
1366  if (!header_size)
1367  return 0;
1368 
1369  pkt_size = isize + header_size;
1370  pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1371  if (!pkt_data)
1372  return AVERROR(ENOMEM);
1373 
1374  memcpy(pkt_data, header, header_size);
1375  memcpy(pkt_data + header_size, data, isize);
1376  break;
1377  }
1378 #if CONFIG_LZO
1380  do {
1381  olen = pkt_size *= 3;
1382  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1384  if (!newpktdata) {
1385  result = AVERROR(ENOMEM);
1386  goto failed;
1387  }
1388  pkt_data = newpktdata;
1389  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1390  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1391  if (result) {
1392  result = AVERROR_INVALIDDATA;
1393  goto failed;
1394  }
1395  pkt_size -= olen;
1396  break;
1397 #endif
1398 #if CONFIG_ZLIB
1400  {
1401  z_stream zstream = { 0 };
1402  if (inflateInit(&zstream) != Z_OK)
1403  return -1;
1404  zstream.next_in = data;
1405  zstream.avail_in = isize;
1406  do {
1407  pkt_size *= 3;
1408  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1409  if (!newpktdata) {
1410  inflateEnd(&zstream);
1411  result = AVERROR(ENOMEM);
1412  goto failed;
1413  }
1414  pkt_data = newpktdata;
1415  zstream.avail_out = pkt_size - zstream.total_out;
1416  zstream.next_out = pkt_data + zstream.total_out;
1417  result = inflate(&zstream, Z_NO_FLUSH);
1418  } while (result == Z_OK && pkt_size < 10000000);
1419  pkt_size = zstream.total_out;
1420  inflateEnd(&zstream);
1421  if (result != Z_STREAM_END) {
1422  if (result == Z_MEM_ERROR)
1423  result = AVERROR(ENOMEM);
1424  else
1425  result = AVERROR_INVALIDDATA;
1426  goto failed;
1427  }
1428  break;
1429  }
1430 #endif
1431 #if CONFIG_BZLIB
1433  {
1434  bz_stream bzstream = { 0 };
1435  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1436  return -1;
1437  bzstream.next_in = data;
1438  bzstream.avail_in = isize;
1439  do {
1440  pkt_size *= 3;
1441  newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1442  if (!newpktdata) {
1443  BZ2_bzDecompressEnd(&bzstream);
1444  result = AVERROR(ENOMEM);
1445  goto failed;
1446  }
1447  pkt_data = newpktdata;
1448  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1449  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1450  result = BZ2_bzDecompress(&bzstream);
1451  } while (result == BZ_OK && pkt_size < 10000000);
1452  pkt_size = bzstream.total_out_lo32;
1453  BZ2_bzDecompressEnd(&bzstream);
1454  if (result != BZ_STREAM_END) {
1455  if (result == BZ_MEM_ERROR)
1456  result = AVERROR(ENOMEM);
1457  else
1458  result = AVERROR_INVALIDDATA;
1459  goto failed;
1460  }
1461  break;
1462  }
1463 #endif
1464  default:
1465  return AVERROR_INVALIDDATA;
1466  }
1467 
1468  memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1469 
1470  *buf = pkt_data;
1471  *buf_size = pkt_size;
1472  return 0;
1473 
1474 failed:
1475  av_free(pkt_data);
1476  return result;
1477 }
1478 
1480  AVDictionary **metadata, char *prefix)
1481 {
1482  MatroskaTag *tags = list->elem;
1483  char key[1024];
1484  int i;
1485 
1486  for (i = 0; i < list->nb_elem; i++) {
1487  const char *lang = tags[i].lang &&
1488  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1489 
1490  if (!tags[i].name) {
1491  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1492  continue;
1493  }
1494  if (prefix)
1495  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1496  else
1497  av_strlcpy(key, tags[i].name, sizeof(key));
1498  if (tags[i].def || !lang) {
1499  av_dict_set(metadata, key, tags[i].string, 0);
1500  if (tags[i].sub.nb_elem)
1501  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1502  }
1503  if (lang) {
1504  av_strlcat(key, "-", sizeof(key));
1505  av_strlcat(key, lang, sizeof(key));
1506  av_dict_set(metadata, key, tags[i].string, 0);
1507  if (tags[i].sub.nb_elem)
1508  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1509  }
1510  }
1512 }
1513 
1515 {
1516  MatroskaDemuxContext *matroska = s->priv_data;
1517  MatroskaTags *tags = matroska->tags.elem;
1518  int i, j;
1519 
1520  for (i = 0; i < matroska->tags.nb_elem; i++) {
1521  if (tags[i].target.attachuid) {
1522  MatroskaAttachment *attachment = matroska->attachments.elem;
1523  int found = 0;
1524  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1525  if (attachment[j].uid == tags[i].target.attachuid &&
1526  attachment[j].stream) {
1527  matroska_convert_tag(s, &tags[i].tag,
1528  &attachment[j].stream->metadata, NULL);
1529  found = 1;
1530  }
1531  }
1532  if (!found) {
1534  "The tags at index %d refer to a "
1535  "non-existent attachment %"PRId64".\n",
1536  i, tags[i].target.attachuid);
1537  }
1538  } else if (tags[i].target.chapteruid) {
1539  MatroskaChapter *chapter = matroska->chapters.elem;
1540  int found = 0;
1541  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1542  if (chapter[j].uid == tags[i].target.chapteruid &&
1543  chapter[j].chapter) {
1544  matroska_convert_tag(s, &tags[i].tag,
1545  &chapter[j].chapter->metadata, NULL);
1546  found = 1;
1547  }
1548  }
1549  if (!found) {
1551  "The tags at index %d refer to a non-existent chapter "
1552  "%"PRId64".\n",
1553  i, tags[i].target.chapteruid);
1554  }
1555  } else if (tags[i].target.trackuid) {
1556  MatroskaTrack *track = matroska->tracks.elem;
1557  int found = 0;
1558  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1559  if (track[j].uid == tags[i].target.trackuid &&
1560  track[j].stream) {
1561  matroska_convert_tag(s, &tags[i].tag,
1562  &track[j].stream->metadata, NULL);
1563  found = 1;
1564  }
1565  }
1566  if (!found) {
1568  "The tags at index %d refer to a non-existent track "
1569  "%"PRId64".\n",
1570  i, tags[i].target.trackuid);
1571  }
1572  } else {
1573  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1574  tags[i].target.type);
1575  }
1576  }
1577 }
1578 
1580  uint64_t pos)
1581 {
1582  uint32_t level_up = matroska->level_up;
1583  uint32_t saved_id = matroska->current_id;
1584  int64_t before_pos = avio_tell(matroska->ctx->pb);
1586  int64_t offset;
1587  int ret = 0;
1588 
1589  /* seek */
1590  offset = pos + matroska->segment_start;
1591  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1592  /* We don't want to lose our seekhead level, so we add
1593  * a dummy. This is a crude hack. */
1594  if (matroska->num_levels == EBML_MAX_DEPTH) {
1595  av_log(matroska->ctx, AV_LOG_INFO,
1596  "Max EBML element depth (%d) reached, "
1597  "cannot parse further.\n", EBML_MAX_DEPTH);
1598  ret = AVERROR_INVALIDDATA;
1599  } else {
1600  level.start = 0;
1601  level.length = (uint64_t) -1;
1602  matroska->levels[matroska->num_levels] = level;
1603  matroska->num_levels++;
1604  matroska->current_id = 0;
1605 
1606  ret = ebml_parse(matroska, matroska_segment, matroska);
1607 
1608  /* remove dummy level */
1609  while (matroska->num_levels) {
1610  uint64_t length = matroska->levels[--matroska->num_levels].length;
1611  if (length == (uint64_t) -1)
1612  break;
1613  }
1614  }
1615  }
1616  /* seek back */
1617  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1618  matroska->level_up = level_up;
1619  matroska->current_id = saved_id;
1620 
1621  return ret;
1622 }
1623 
1625 {
1626  EbmlList *seekhead_list = &matroska->seekhead;
1627  int i;
1628 
1629  // we should not do any seeking in the streaming case
1630  if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1631  return;
1632 
1633  for (i = 0; i < seekhead_list->nb_elem; i++) {
1634  MatroskaSeekhead *seekheads = seekhead_list->elem;
1635  uint32_t id = seekheads[i].id;
1636  uint64_t pos = seekheads[i].pos;
1637 
1638  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1639  if (!elem || elem->parsed)
1640  continue;
1641 
1642  elem->pos = pos;
1643 
1644  // defer cues parsing until we actually need cue data.
1645  if (id == MATROSKA_ID_CUES)
1646  continue;
1647 
1648  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1649  // mark index as broken
1650  matroska->cues_parsing_deferred = -1;
1651  break;
1652  }
1653 
1654  elem->parsed = 1;
1655  }
1656 }
1657 
1659 {
1660  EbmlList *index_list;
1662  uint64_t index_scale = 1;
1663  int i, j;
1664 
1665  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1666  return;
1667 
1668  index_list = &matroska->index;
1669  index = index_list->elem;
1670  if (index_list->nb_elem < 2)
1671  return;
1672  if (index[1].time > 1E14 / matroska->time_scale) {
1673  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1674  return;
1675  }
1676  for (i = 0; i < index_list->nb_elem; i++) {
1677  EbmlList *pos_list = &index[i].pos;
1678  MatroskaIndexPos *pos = pos_list->elem;
1679  for (j = 0; j < pos_list->nb_elem; j++) {
1680  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1681  pos[j].track);
1682  if (track && track->stream)
1683  av_add_index_entry(track->stream,
1684  pos[j].pos + matroska->segment_start,
1685  index[i].time / index_scale, 0, 0,
1687  }
1688  }
1689 }
1690 
1692  int i;
1693 
1694  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1695  return;
1696 
1697  for (i = 0; i < matroska->num_level1_elems; i++) {
1698  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1699  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1700  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1701  matroska->cues_parsing_deferred = -1;
1702  elem->parsed = 1;
1703  break;
1704  }
1705  }
1706 
1707  matroska_add_index_entries(matroska);
1708 }
1709 
1711 {
1712  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1713  int profile;
1714 
1715  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1716  if (strstr(codec_id, aac_profiles[profile]))
1717  break;
1718  return profile + 1;
1719 }
1720 
1721 static int matroska_aac_sri(int samplerate)
1722 {
1723  int sri;
1724 
1725  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1726  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1727  break;
1728  return sri;
1729 }
1730 
1731 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1732 {
1733  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1734  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1735 }
1736 
1738  MatroskaTrack *track,
1739  int *offset)
1740 {
1741  AVStream *st = track->stream;
1742  uint8_t *p = track->codec_priv.data;
1743  int size = track->codec_priv.size;
1744 
1745  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1746  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1747  track->codec_priv.size = 0;
1748  return 0;
1749  }
1750  *offset = 8;
1751  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1752 
1753  p += track->codec_priv.size;
1754  size -= track->codec_priv.size;
1755 
1756  /* parse the remaining metadata blocks if present */
1757  while (size >= 4) {
1758  int block_last, block_type, block_size;
1759 
1760  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1761 
1762  p += 4;
1763  size -= 4;
1764  if (block_size > size)
1765  return 0;
1766 
1767  /* check for the channel mask */
1768  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1769  AVDictionary *dict = NULL;
1770  AVDictionaryEntry *chmask;
1771 
1772  ff_vorbis_comment(s, &dict, p, block_size, 0);
1773  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1774  if (chmask) {
1775  uint64_t mask = strtol(chmask->value, NULL, 0);
1776  if (!mask || mask & ~0x3ffffULL) {
1778  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1779  } else
1780  st->codecpar->channel_layout = mask;
1781  }
1782  av_dict_free(&dict);
1783  }
1784 
1785  p += block_size;
1786  size -= block_size;
1787  }
1788 
1789  return 0;
1790 }
1791 
1792 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1793 {
1794  int major, minor, micro, bttb = 0;
1795 
1796  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1797  * this function, and fixed in 57.52 */
1798  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
1799  bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1800 
1801  switch (field_order) {
1803  return AV_FIELD_PROGRESSIVE;
1805  return AV_FIELD_UNKNOWN;
1807  return AV_FIELD_TT;
1809  return AV_FIELD_BB;
1811  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1813  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1814  default:
1815  return AV_FIELD_UNKNOWN;
1816  }
1817 }
1818 
1819 static void mkv_stereo_mode_display_mul(int stereo_mode,
1820  int *h_width, int *h_height)
1821 {
1822  switch (stereo_mode) {
1828  break;
1833  *h_width = 2;
1834  break;
1839  *h_height = 2;
1840  break;
1841  }
1842 }
1843 
1844 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1845  const MatroskaTrackVideoColor *color = track->video.color.elem;
1846  const MatroskaMasteringMeta *mastering_meta;
1847  int has_mastering_primaries, has_mastering_luminance;
1848 
1849  if (!track->video.color.nb_elem)
1850  return 0;
1851 
1852  mastering_meta = &color->mastering_meta;
1853  // Mastering primaries are CIE 1931 coords, and must be > 0.
1854  has_mastering_primaries =
1855  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1856  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1857  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1858  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1859  has_mastering_luminance = mastering_meta->max_luminance > 0;
1860 
1863  if (color->primaries != AVCOL_PRI_RESERVED &&
1864  color->primaries != AVCOL_PRI_RESERVED0)
1865  st->codecpar->color_primaries = color->primaries;
1869  if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1870  color->range <= AVCOL_RANGE_JPEG)
1871  st->codecpar->color_range = color->range;
1876  st->codecpar->chroma_location =
1878  (color->chroma_siting_vert - 1) << 7);
1879  }
1880  if (color->max_cll && color->max_fall) {
1881  size_t size = 0;
1882  int ret;
1884  if (!metadata)
1885  return AVERROR(ENOMEM);
1887  (uint8_t *)metadata, size);
1888  if (ret < 0) {
1889  av_freep(&metadata);
1890  return ret;
1891  }
1892  metadata->MaxCLL = color->max_cll;
1893  metadata->MaxFALL = color->max_fall;
1894  }
1895 
1896  if (has_mastering_primaries || has_mastering_luminance) {
1897  // Use similar rationals as other standards.
1898  const int chroma_den = 50000;
1899  const int luma_den = 10000;
1900  AVMasteringDisplayMetadata *metadata =
1903  sizeof(AVMasteringDisplayMetadata));
1904  if (!metadata) {
1905  return AVERROR(ENOMEM);
1906  }
1907  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1908  if (has_mastering_primaries) {
1909  metadata->display_primaries[0][0] = av_make_q(
1910  round(mastering_meta->r_x * chroma_den), chroma_den);
1911  metadata->display_primaries[0][1] = av_make_q(
1912  round(mastering_meta->r_y * chroma_den), chroma_den);
1913  metadata->display_primaries[1][0] = av_make_q(
1914  round(mastering_meta->g_x * chroma_den), chroma_den);
1915  metadata->display_primaries[1][1] = av_make_q(
1916  round(mastering_meta->g_y * chroma_den), chroma_den);
1917  metadata->display_primaries[2][0] = av_make_q(
1918  round(mastering_meta->b_x * chroma_den), chroma_den);
1919  metadata->display_primaries[2][1] = av_make_q(
1920  round(mastering_meta->b_y * chroma_den), chroma_den);
1921  metadata->white_point[0] = av_make_q(
1922  round(mastering_meta->white_x * chroma_den), chroma_den);
1923  metadata->white_point[1] = av_make_q(
1924  round(mastering_meta->white_y * chroma_den), chroma_den);
1925  metadata->has_primaries = 1;
1926  }
1927  if (has_mastering_luminance) {
1928  metadata->max_luminance = av_make_q(
1929  round(mastering_meta->max_luminance * luma_den), luma_den);
1930  metadata->min_luminance = av_make_q(
1931  round(mastering_meta->min_luminance * luma_den), luma_den);
1932  metadata->has_luminance = 1;
1933  }
1934  }
1935  return 0;
1936 }
1937 
1938 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1939  AVSphericalMapping *spherical;
1940  enum AVSphericalProjection projection;
1941  size_t spherical_size;
1942  uint32_t l = 0, t = 0, r = 0, b = 0;
1943  uint32_t padding = 0;
1944  int ret;
1945  GetByteContext gb;
1946 
1948  track->video.projection.private.size);
1949 
1950  if (bytestream2_get_byte(&gb) != 0) {
1951  av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1952  return 0;
1953  }
1954 
1955  bytestream2_skip(&gb, 3); // flags
1956 
1957  switch (track->video.projection.type) {
1959  if (track->video.projection.private.size == 20) {
1960  t = bytestream2_get_be32(&gb);
1961  b = bytestream2_get_be32(&gb);
1962  l = bytestream2_get_be32(&gb);
1963  r = bytestream2_get_be32(&gb);
1964 
1965  if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1967  "Invalid bounding rectangle coordinates "
1968  "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1969  l, t, r, b);
1970  return AVERROR_INVALIDDATA;
1971  }
1972  } else if (track->video.projection.private.size != 0) {
1973  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1974  return AVERROR_INVALIDDATA;
1975  }
1976 
1977  if (l || t || r || b)
1978  projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1979  else
1980  projection = AV_SPHERICAL_EQUIRECTANGULAR;
1981  break;
1983  if (track->video.projection.private.size < 4) {
1984  av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1985  return AVERROR_INVALIDDATA;
1986  } else if (track->video.projection.private.size == 12) {
1987  uint32_t layout = bytestream2_get_be32(&gb);
1988  if (layout) {
1990  "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1991  return 0;
1992  }
1993  projection = AV_SPHERICAL_CUBEMAP;
1994  padding = bytestream2_get_be32(&gb);
1995  } else {
1996  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1997  return AVERROR_INVALIDDATA;
1998  }
1999  break;
2001  /* No Spherical metadata */
2002  return 0;
2003  default:
2005  "Unknown spherical metadata type %"PRIu64"\n",
2006  track->video.projection.type);
2007  return 0;
2008  }
2009 
2010  spherical = av_spherical_alloc(&spherical_size);
2011  if (!spherical)
2012  return AVERROR(ENOMEM);
2013 
2014  spherical->projection = projection;
2015 
2016  spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2017  spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2018  spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2019 
2020  spherical->padding = padding;
2021 
2022  spherical->bound_left = l;
2023  spherical->bound_top = t;
2024  spherical->bound_right = r;
2025  spherical->bound_bottom = b;
2026 
2027  ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2028  spherical_size);
2029  if (ret < 0) {
2030  av_freep(&spherical);
2031  return ret;
2032  }
2033 
2034  return 0;
2035 }
2036 
2037 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2038 {
2039  const AVCodecTag *codec_tags;
2040 
2041  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2043 
2044  /* Normalize noncompliant private data that starts with the fourcc
2045  * by expanding/shifting the data by 4 bytes and storing the data
2046  * size at the start. */
2047  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2048  int ret = av_buffer_realloc(&track->codec_priv.buf,
2050  if (ret < 0)
2051  return ret;
2052 
2053  track->codec_priv.data = track->codec_priv.buf->data;
2054  memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2055  track->codec_priv.size += 4;
2056  AV_WB32(track->codec_priv.data, track->codec_priv.size);
2057  }
2058 
2059  *fourcc = AV_RL32(track->codec_priv.data + 4);
2060  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2061 
2062  return 0;
2063 }
2064 
2066 {
2067  MatroskaDemuxContext *matroska = s->priv_data;
2068  MatroskaTrack *tracks = matroska->tracks.elem;
2069  AVStream *st;
2070  int i, j, ret;
2071  int k;
2072 
2073  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2074  MatroskaTrack *track = &tracks[i];
2076  EbmlList *encodings_list = &track->encodings;
2077  MatroskaTrackEncoding *encodings = encodings_list->elem;
2078  uint8_t *extradata = NULL;
2079  int extradata_size = 0;
2080  int extradata_offset = 0;
2081  uint32_t fourcc = 0;
2082  AVIOContext b;
2083  char* key_id_base64 = NULL;
2084  int bit_depth = -1;
2085 
2086  /* Apply some sanity checks. */
2087  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2088  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2089  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2090  track->type != MATROSKA_TRACK_TYPE_METADATA) {
2091  av_log(matroska->ctx, AV_LOG_INFO,
2092  "Unknown or unsupported track type %"PRIu64"\n",
2093  track->type);
2094  continue;
2095  }
2096  if (!track->codec_id)
2097  continue;
2098 
2099  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2100  isnan(track->audio.samplerate)) {
2101  av_log(matroska->ctx, AV_LOG_WARNING,
2102  "Invalid sample rate %f, defaulting to 8000 instead.\n",
2103  track->audio.samplerate);
2104  track->audio.samplerate = 8000;
2105  }
2106 
2107  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2108  if (!track->default_duration && track->video.frame_rate > 0) {
2109  double default_duration = 1000000000 / track->video.frame_rate;
2110  if (default_duration > UINT64_MAX || default_duration < 0) {
2111  av_log(matroska->ctx, AV_LOG_WARNING,
2112  "Invalid frame rate %e. Cannot calculate default duration.\n",
2113  track->video.frame_rate);
2114  } else {
2115  track->default_duration = default_duration;
2116  }
2117  }
2118  if (track->video.display_width == -1)
2119  track->video.display_width = track->video.pixel_width;
2120  if (track->video.display_height == -1)
2121  track->video.display_height = track->video.pixel_height;
2122  if (track->video.color_space.size == 4)
2123  fourcc = AV_RL32(track->video.color_space.data);
2124  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2125  if (!track->audio.out_samplerate)
2126  track->audio.out_samplerate = track->audio.samplerate;
2127  }
2128  if (encodings_list->nb_elem > 1) {
2129  av_log(matroska->ctx, AV_LOG_ERROR,
2130  "Multiple combined encodings not supported");
2131  } else if (encodings_list->nb_elem == 1) {
2132  if (encodings[0].type) {
2133  if (encodings[0].encryption.key_id.size > 0) {
2134  /* Save the encryption key id to be stored later as a
2135  metadata tag. */
2136  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2137  key_id_base64 = av_malloc(b64_size);
2138  if (key_id_base64 == NULL)
2139  return AVERROR(ENOMEM);
2140 
2141  av_base64_encode(key_id_base64, b64_size,
2142  encodings[0].encryption.key_id.data,
2143  encodings[0].encryption.key_id.size);
2144  } else {
2145  encodings[0].scope = 0;
2146  av_log(matroska->ctx, AV_LOG_ERROR,
2147  "Unsupported encoding type");
2148  }
2149  } else if (
2150 #if CONFIG_ZLIB
2151  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2152 #endif
2153 #if CONFIG_BZLIB
2155 #endif
2156 #if CONFIG_LZO
2158 #endif
2160  encodings[0].scope = 0;
2161  av_log(matroska->ctx, AV_LOG_ERROR,
2162  "Unsupported encoding type");
2163  } else if (track->codec_priv.size && encodings[0].scope & 2) {
2164  uint8_t *codec_priv = track->codec_priv.data;
2165  int ret = matroska_decode_buffer(&track->codec_priv.data,
2166  &track->codec_priv.size,
2167  track);
2168  if (ret < 0) {
2169  track->codec_priv.data = NULL;
2170  track->codec_priv.size = 0;
2171  av_log(matroska->ctx, AV_LOG_ERROR,
2172  "Failed to decode codec private data\n");
2173  }
2174 
2175  if (codec_priv != track->codec_priv.data) {
2176  av_buffer_unref(&track->codec_priv.buf);
2177  if (track->codec_priv.data) {
2178  track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2180  NULL, NULL, 0);
2181  if (!track->codec_priv.buf) {
2182  av_freep(&track->codec_priv.data);
2183  track->codec_priv.size = 0;
2184  return AVERROR(ENOMEM);
2185  }
2186  }
2187  }
2188  }
2189  }
2190 
2191  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2192  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2193  strlen(ff_mkv_codec_tags[j].str))) {
2194  codec_id = ff_mkv_codec_tags[j].id;
2195  break;
2196  }
2197  }
2198 
2199  st = track->stream = avformat_new_stream(s, NULL);
2200  if (!st) {
2201  av_free(key_id_base64);
2202  return AVERROR(ENOMEM);
2203  }
2204 
2205  if (key_id_base64) {
2206  /* export encryption key id as base64 metadata tag */
2207  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2208  av_freep(&key_id_base64);
2209  }
2210 
2211  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2212  track->codec_priv.size >= 40 &&
2213  track->codec_priv.data) {
2214  track->ms_compat = 1;
2215  bit_depth = AV_RL16(track->codec_priv.data + 14);
2216  fourcc = AV_RL32(track->codec_priv.data + 16);
2218  fourcc);
2219  if (!codec_id)
2221  fourcc);
2222  extradata_offset = 40;
2223  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2224  track->codec_priv.size >= 14 &&
2225  track->codec_priv.data) {
2226  int ret;
2227  ffio_init_context(&b, track->codec_priv.data,
2228  track->codec_priv.size,
2229  0, NULL, NULL, NULL, NULL);
2230  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2231  if (ret < 0)
2232  return ret;
2233  codec_id = st->codecpar->codec_id;
2234  fourcc = st->codecpar->codec_tag;
2235  extradata_offset = FFMIN(track->codec_priv.size, 18);
2236  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2237  /* Normally 36, but allow noncompliant private data */
2238  && (track->codec_priv.size >= 32)
2239  && (track->codec_priv.data)) {
2240  uint16_t sample_size;
2241  int ret = get_qt_codec(track, &fourcc, &codec_id);
2242  if (ret < 0)
2243  return ret;
2244  sample_size = AV_RB16(track->codec_priv.data + 26);
2245  if (fourcc == 0) {
2246  if (sample_size == 8) {
2247  fourcc = MKTAG('r','a','w',' ');
2248  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2249  } else if (sample_size == 16) {
2250  fourcc = MKTAG('t','w','o','s');
2251  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2252  }
2253  }
2254  if ((fourcc == MKTAG('t','w','o','s') ||
2255  fourcc == MKTAG('s','o','w','t')) &&
2256  sample_size == 8)
2257  codec_id = AV_CODEC_ID_PCM_S8;
2258  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2259  (track->codec_priv.size >= 21) &&
2260  (track->codec_priv.data)) {
2261  int ret = get_qt_codec(track, &fourcc, &codec_id);
2262  if (ret < 0)
2263  return ret;
2264  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2265  fourcc = MKTAG('S','V','Q','3');
2266  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2267  }
2268  if (codec_id == AV_CODEC_ID_NONE)
2269  av_log(matroska->ctx, AV_LOG_ERROR,
2270  "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2271  if (track->codec_priv.size >= 86) {
2272  bit_depth = AV_RB16(track->codec_priv.data + 82);
2273  ffio_init_context(&b, track->codec_priv.data,
2274  track->codec_priv.size,
2275  0, NULL, NULL, NULL, NULL);
2276  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2277  bit_depth &= 0x1F;
2278  track->has_palette = 1;
2279  }
2280  }
2281  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2282  switch (track->audio.bitdepth) {
2283  case 8:
2284  codec_id = AV_CODEC_ID_PCM_U8;
2285  break;
2286  case 24:
2287  codec_id = AV_CODEC_ID_PCM_S24BE;
2288  break;
2289  case 32:
2290  codec_id = AV_CODEC_ID_PCM_S32BE;
2291  break;
2292  }
2293  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2294  switch (track->audio.bitdepth) {
2295  case 8:
2296  codec_id = AV_CODEC_ID_PCM_U8;
2297  break;
2298  case 24:
2299  codec_id = AV_CODEC_ID_PCM_S24LE;
2300  break;
2301  case 32:
2302  codec_id = AV_CODEC_ID_PCM_S32LE;
2303  break;
2304  }
2305  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2306  track->audio.bitdepth == 64) {
2307  codec_id = AV_CODEC_ID_PCM_F64LE;
2308  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2309  int profile = matroska_aac_profile(track->codec_id);
2310  int sri = matroska_aac_sri(track->audio.samplerate);
2311  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2312  if (!extradata)
2313  return AVERROR(ENOMEM);
2314  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2315  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2316  if (strstr(track->codec_id, "SBR")) {
2317  sri = matroska_aac_sri(track->audio.out_samplerate);
2318  extradata[2] = 0x56;
2319  extradata[3] = 0xE5;
2320  extradata[4] = 0x80 | (sri << 3);
2321  extradata_size = 5;
2322  } else
2323  extradata_size = 2;
2324  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2325  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2326  * Create the "atom size", "tag", and "tag version" fields the
2327  * decoder expects manually. */
2328  extradata_size = 12 + track->codec_priv.size;
2329  extradata = av_mallocz(extradata_size +
2331  if (!extradata)
2332  return AVERROR(ENOMEM);
2333  AV_WB32(extradata, extradata_size);
2334  memcpy(&extradata[4], "alac", 4);
2335  AV_WB32(&extradata[8], 0);
2336  memcpy(&extradata[12], track->codec_priv.data,
2337  track->codec_priv.size);
2338  } else if (codec_id == AV_CODEC_ID_TTA) {
2339  extradata_size = 30;
2340  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2341  if (!extradata)
2342  return AVERROR(ENOMEM);
2343  ffio_init_context(&b, extradata, extradata_size, 1,
2344  NULL, NULL, NULL, NULL);
2345  avio_write(&b, "TTA1", 4);
2346  avio_wl16(&b, 1);
2347  if (track->audio.channels > UINT16_MAX ||
2348  track->audio.bitdepth > UINT16_MAX) {
2349  av_log(matroska->ctx, AV_LOG_WARNING,
2350  "Too large audio channel number %"PRIu64
2351  " or bitdepth %"PRIu64". Skipping track.\n",
2352  track->audio.channels, track->audio.bitdepth);
2353  av_freep(&extradata);
2354  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2355  return AVERROR_INVALIDDATA;
2356  else
2357  continue;
2358  }
2359  avio_wl16(&b, track->audio.channels);
2360  avio_wl16(&b, track->audio.bitdepth);
2361  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2362  return AVERROR_INVALIDDATA;
2363  avio_wl32(&b, track->audio.out_samplerate);
2364  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2365  track->audio.out_samplerate,
2366  AV_TIME_BASE * 1000));
2367  } else if (codec_id == AV_CODEC_ID_RV10 ||
2368  codec_id == AV_CODEC_ID_RV20 ||
2369  codec_id == AV_CODEC_ID_RV30 ||
2370  codec_id == AV_CODEC_ID_RV40) {
2371  extradata_offset = 26;
2372  } else if (codec_id == AV_CODEC_ID_RA_144) {
2373  track->audio.out_samplerate = 8000;
2374  track->audio.channels = 1;
2375  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2376  codec_id == AV_CODEC_ID_COOK ||
2377  codec_id == AV_CODEC_ID_ATRAC3 ||
2378  codec_id == AV_CODEC_ID_SIPR)
2379  && track->codec_priv.data) {
2380  int flavor;
2381 
2382  ffio_init_context(&b, track->codec_priv.data,
2383  track->codec_priv.size,
2384  0, NULL, NULL, NULL, NULL);
2385  avio_skip(&b, 22);
2386  flavor = avio_rb16(&b);
2387  track->audio.coded_framesize = avio_rb32(&b);
2388  avio_skip(&b, 12);
2389  track->audio.sub_packet_h = avio_rb16(&b);
2390  track->audio.frame_size = avio_rb16(&b);
2391  track->audio.sub_packet_size = avio_rb16(&b);
2392  if (flavor < 0 ||
2393  track->audio.coded_framesize <= 0 ||
2394  track->audio.sub_packet_h <= 0 ||
2395  track->audio.frame_size <= 0 ||
2396  track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2397  return AVERROR_INVALIDDATA;
2398  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2399  track->audio.frame_size);
2400  if (!track->audio.buf)
2401  return AVERROR(ENOMEM);
2402  if (codec_id == AV_CODEC_ID_RA_288) {
2403  st->codecpar->block_align = track->audio.coded_framesize;
2404  track->codec_priv.size = 0;
2405  } else {
2406  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2407  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2408  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2409  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2410  }
2411  st->codecpar->block_align = track->audio.sub_packet_size;
2412  extradata_offset = 78;
2413  }
2414  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2415  ret = matroska_parse_flac(s, track, &extradata_offset);
2416  if (ret < 0)
2417  return ret;
2418  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2419  fourcc = AV_RL32(track->codec_priv.data);
2420  } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2421  /* we don't need any value stored in CodecPrivate.
2422  make sure that it's not exported as extradata. */
2423  track->codec_priv.size = 0;
2424  }
2425  track->codec_priv.size -= extradata_offset;
2426 
2427  if (codec_id == AV_CODEC_ID_NONE)
2428  av_log(matroska->ctx, AV_LOG_INFO,
2429  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2430 
2431  if (track->time_scale < 0.01)
2432  track->time_scale = 1.0;
2433  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2434  1000 * 1000 * 1000); /* 64 bit pts in ns */
2435 
2436  /* convert the delay from ns to the track timebase */
2438  (AVRational){ 1, 1000000000 },
2439  st->time_base);
2440 
2441  st->codecpar->codec_id = codec_id;
2442 
2443  if (strcmp(track->language, "und"))
2444  av_dict_set(&st->metadata, "language", track->language, 0);
2445  av_dict_set(&st->metadata, "title", track->name, 0);
2446 
2447  if (track->flag_default)
2449  if (track->flag_forced)
2451 
2452  if (!st->codecpar->extradata) {
2453  if (extradata) {
2454  st->codecpar->extradata = extradata;
2455  st->codecpar->extradata_size = extradata_size;
2456  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2457  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2458  return AVERROR(ENOMEM);
2459  memcpy(st->codecpar->extradata,
2460  track->codec_priv.data + extradata_offset,
2461  track->codec_priv.size);
2462  }
2463  }
2464 
2465  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2466  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2467  int display_width_mul = 1;
2468  int display_height_mul = 1;
2469 
2471  st->codecpar->codec_tag = fourcc;
2472  if (bit_depth >= 0)
2474  st->codecpar->width = track->video.pixel_width;
2475  st->codecpar->height = track->video.pixel_height;
2476 
2477  if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2478  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2479  else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2481 
2482  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2483  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2484 
2485  if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2487  &st->sample_aspect_ratio.den,
2488  st->codecpar->height * track->video.display_width * display_width_mul,
2489  st->codecpar->width * track->video.display_height * display_height_mul,
2490  255);
2491  }
2492  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2494 
2495  if (track->default_duration) {
2497  1000000000, track->default_duration, 30000);
2498 #if FF_API_R_FRAME_RATE
2499  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2500  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2501  st->r_frame_rate = st->avg_frame_rate;
2502 #endif
2503  }
2504 
2505  /* export stereo mode flag as metadata tag */
2506  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2507  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2508 
2509  /* export alpha mode flag as metadata tag */
2510  if (track->video.alpha_mode)
2511  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2512 
2513  /* if we have virtual track, mark the real tracks */
2514  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2515  char buf[32];
2516  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2517  continue;
2518  snprintf(buf, sizeof(buf), "%s_%d",
2519  ff_matroska_video_stereo_plane[planes[j].type], i);
2520  for (k=0; k < matroska->tracks.nb_elem; k++)
2521  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2522  av_dict_set(&tracks[k].stream->metadata,
2523  "stereo_mode", buf, 0);
2524  break;
2525  }
2526  }
2527  // add stream level stereo3d side data if it is a supported format
2528  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2529  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2530  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2531  if (ret < 0)
2532  return ret;
2533  }
2534 
2535  ret = mkv_parse_video_color(st, track);
2536  if (ret < 0)
2537  return ret;
2538  ret = mkv_parse_video_projection(st, track);
2539  if (ret < 0)
2540  return ret;
2541  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2543  st->codecpar->codec_tag = fourcc;
2544  st->codecpar->sample_rate = track->audio.out_samplerate;
2545  st->codecpar->channels = track->audio.channels;
2546  if (!st->codecpar->bits_per_coded_sample)
2547  st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2548  if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2549  st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2552  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2554  if (track->codec_delay > 0) {
2555  st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2556  (AVRational){1, 1000000000},
2558  48000 : st->codecpar->sample_rate});
2559  }
2560  if (track->seek_preroll > 0) {
2561  st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2562  (AVRational){1, 1000000000},
2563  (AVRational){1, st->codecpar->sample_rate});
2564  }
2565  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2566  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2567 
2568  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2569  st->disposition |= AV_DISPOSITION_CAPTIONS;
2570  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2571  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2572  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2573  st->disposition |= AV_DISPOSITION_METADATA;
2574  }
2575  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2576  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2577  if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2578  matroska->contains_ssa = 1;
2579  }
2580  }
2581 
2582  return 0;
2583 }
2584 
2586 {
2587  MatroskaDemuxContext *matroska = s->priv_data;
2588  EbmlList *attachments_list = &matroska->attachments;
2589  EbmlList *chapters_list = &matroska->chapters;
2590  MatroskaAttachment *attachments;
2591  MatroskaChapter *chapters;
2592  uint64_t max_start = 0;
2593  int64_t pos;
2594  Ebml ebml = { 0 };
2595  int i, j, res;
2596 
2597  matroska->ctx = s;
2598  matroska->cues_parsing_deferred = 1;
2599 
2600  /* First read the EBML header. */
2601  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2602  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2603  ebml_free(ebml_syntax, &ebml);
2604  return AVERROR_INVALIDDATA;
2605  }
2606  if (ebml.version > EBML_VERSION ||
2607  ebml.max_size > sizeof(uint64_t) ||
2608  ebml.id_length > sizeof(uint32_t) ||
2609  ebml.doctype_version > 3) {
2611  "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2612  ebml.version, ebml.doctype, ebml.doctype_version);
2613  ebml_free(ebml_syntax, &ebml);
2614  return AVERROR_PATCHWELCOME;
2615  } else if (ebml.doctype_version == 3) {
2616  av_log(matroska->ctx, AV_LOG_WARNING,
2617  "EBML header using unsupported features\n"
2618  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2619  ebml.version, ebml.doctype, ebml.doctype_version);
2620  }
2621  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2622  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2623  break;
2624  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2625  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2626  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2627  ebml_free(ebml_syntax, &ebml);
2628  return AVERROR_INVALIDDATA;
2629  }
2630  }
2631  ebml_free(ebml_syntax, &ebml);
2632 
2633  /* The next thing is a segment. */
2634  pos = avio_tell(matroska->ctx->pb);
2635  res = ebml_parse(matroska, matroska_segments, matroska);
2636  // try resyncing until we find a EBML_STOP type element.
2637  while (res != 1) {
2638  res = matroska_resync(matroska, pos);
2639  if (res < 0)
2640  goto fail;
2641  pos = avio_tell(matroska->ctx->pb);
2642  res = ebml_parse(matroska, matroska_segment, matroska);
2643  }
2644  matroska_execute_seekhead(matroska);
2645 
2646  if (!matroska->time_scale)
2647  matroska->time_scale = 1000000;
2648  if (matroska->duration)
2649  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2650  1000 / AV_TIME_BASE;
2651  av_dict_set(&s->metadata, "title", matroska->title, 0);
2652  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2653 
2654  if (matroska->date_utc.size == 8)
2656 
2657  res = matroska_parse_tracks(s);
2658  if (res < 0)
2659  goto fail;
2660 
2661  attachments = attachments_list->elem;
2662  for (j = 0; j < attachments_list->nb_elem; j++) {
2663  if (!(attachments[j].filename && attachments[j].mime &&
2664  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2665  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2666  } else {
2667  AVStream *st = avformat_new_stream(s, NULL);
2668  if (!st)
2669  break;
2670  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2671  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2673 
2674  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2675  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2676  strlen(ff_mkv_image_mime_tags[i].str))) {
2678  break;
2679  }
2680  }
2681 
2682  attachments[j].stream = st;
2683 
2684  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2687 
2689  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2690  return res;
2691  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2692  st->attached_pic.stream_index = st->index;
2694  } else {
2696  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2697  break;
2698  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2699  attachments[j].bin.size);
2700 
2701  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2702  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2703  strlen(ff_mkv_mime_tags[i].str))) {
2705  break;
2706  }
2707  }
2708  }
2709  }
2710  }
2711 
2712  chapters = chapters_list->elem;
2713  for (i = 0; i < chapters_list->nb_elem; i++)
2714  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2715  (max_start == 0 || chapters[i].start > max_start)) {
2716  chapters[i].chapter =
2717  avpriv_new_chapter(s, chapters[i].uid,
2718  (AVRational) { 1, 1000000000 },
2719  chapters[i].start, chapters[i].end,
2720  chapters[i].title);
2721  if (chapters[i].chapter) {
2722  av_dict_set(&chapters[i].chapter->metadata,
2723  "title", chapters[i].title, 0);
2724  }
2725  max_start = chapters[i].start;
2726  }
2727 
2728  matroska_add_index_entries(matroska);
2729 
2731 
2732  return 0;
2733 fail:
2735  return res;
2736 }
2737 
2738 /*
2739  * Put one packet in an application-supplied AVPacket struct.
2740  * Returns 0 on success or -1 on failure.
2741  */
2743  AVPacket *pkt)
2744 {
2745  if (matroska->queue) {
2746  MatroskaTrack *tracks = matroska->tracks.elem;
2747  MatroskaTrack *track;
2748 
2749  ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2750  track = &tracks[pkt->stream_index];
2751  if (track->has_palette) {
2753  if (!pal) {
2754  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2755  } else {
2756  memcpy(pal, track->palette, AVPALETTE_SIZE);
2757  }
2758  track->has_palette = 0;
2759  }
2760  return 0;
2761  }
2762 
2763  return -1;
2764 }
2765 
2766 /*
2767  * Free all packets in our internal queue.
2768  */
2770 {
2771  ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2772 }
2773 
2775  int *buf_size, int type,
2776  uint32_t **lace_buf, int *laces)
2777 {
2778  int res = 0, n, size = *buf_size;
2779  uint8_t *data = *buf;
2780  uint32_t *lace_size;
2781 
2782  if (!type) {
2783  *laces = 1;
2784  *lace_buf = av_mallocz(sizeof(int));
2785  if (!*lace_buf)
2786  return AVERROR(ENOMEM);
2787 
2788  *lace_buf[0] = size;
2789  return 0;
2790  }
2791 
2792  av_assert0(size > 0);
2793  *laces = *data + 1;
2794  data += 1;
2795  size -= 1;
2796  lace_size = av_mallocz(*laces * sizeof(int));
2797  if (!lace_size)
2798  return AVERROR(ENOMEM);
2799 
2800  switch (type) {
2801  case 0x1: /* Xiph lacing */
2802  {
2803  uint8_t temp;
2804  uint32_t total = 0;
2805  for (n = 0; res == 0 && n < *laces - 1; n++) {
2806  while (1) {
2807  if (size <= total) {
2808  res = AVERROR_INVALIDDATA;
2809  break;
2810  }
2811  temp = *data;
2812  total += temp;
2813  lace_size[n] += temp;
2814  data += 1;
2815  size -= 1;
2816  if (temp != 0xff)
2817  break;
2818  }
2819  }
2820  if (size <= total) {
2821  res = AVERROR_INVALIDDATA;
2822  break;
2823  }
2824 
2825  lace_size[n] = size - total;
2826  break;
2827  }
2828 
2829  case 0x2: /* fixed-size lacing */
2830  if (size % (*laces)) {
2831  res = AVERROR_INVALIDDATA;
2832  break;
2833  }
2834  for (n = 0; n < *laces; n++)
2835  lace_size[n] = size / *laces;
2836  break;
2837 
2838  case 0x3: /* EBML lacing */
2839  {
2840  uint64_t num;
2841  uint64_t total;
2842  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2843  if (n < 0 || num > INT_MAX) {
2844  av_log(matroska->ctx, AV_LOG_INFO,
2845  "EBML block data error\n");
2846  res = n<0 ? n : AVERROR_INVALIDDATA;
2847  break;
2848  }
2849  data += n;
2850  size -= n;
2851  total = lace_size[0] = num;
2852  for (n = 1; res == 0 && n < *laces - 1; n++) {
2853  int64_t snum;
2854  int r;
2855  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2856  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2857  av_log(matroska->ctx, AV_LOG_INFO,
2858  "EBML block data error\n");
2859  res = r<0 ? r : AVERROR_INVALIDDATA;
2860  break;
2861  }
2862  data += r;
2863  size -= r;
2864  lace_size[n] = lace_size[n - 1] + snum;
2865  total += lace_size[n];
2866  }
2867  if (size <= total) {
2868  res = AVERROR_INVALIDDATA;
2869  break;
2870  }
2871  lace_size[*laces - 1] = size - total;
2872  break;
2873  }
2874  }
2875 
2876  *buf = data;
2877  *lace_buf = lace_size;
2878  *buf_size = size;
2879 
2880  return res;
2881 }
2882 
2884  MatroskaTrack *track, AVStream *st,
2885  uint8_t *data, int size, uint64_t timecode,
2886  int64_t pos)
2887 {
2888  int a = st->codecpar->block_align;
2889  int sps = track->audio.sub_packet_size;
2890  int cfs = track->audio.coded_framesize;
2891  int h = track->audio.sub_packet_h;
2892  int y = track->audio.sub_packet_cnt;
2893  int w = track->audio.frame_size;
2894  int x;
2895 
2896  if (!track->audio.pkt_cnt) {
2897  if (track->audio.sub_packet_cnt == 0)
2898  track->audio.buf_timecode = timecode;
2899  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2900  if (size < cfs * h / 2) {
2901  av_log(matroska->ctx, AV_LOG_ERROR,
2902  "Corrupt int4 RM-style audio packet size\n");
2903  return AVERROR_INVALIDDATA;
2904  }
2905  for (x = 0; x < h / 2; x++)
2906  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2907  data + x * cfs, cfs);
2908  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2909  if (size < w) {
2910  av_log(matroska->ctx, AV_LOG_ERROR,
2911  "Corrupt sipr RM-style audio packet size\n");
2912  return AVERROR_INVALIDDATA;
2913  }
2914  memcpy(track->audio.buf + y * w, data, w);
2915  } else {
2916  if (size < sps * w / sps || h<=0 || w%sps) {
2917  av_log(matroska->ctx, AV_LOG_ERROR,
2918  "Corrupt generic RM-style audio packet size\n");
2919  return AVERROR_INVALIDDATA;
2920  }
2921  for (x = 0; x < w / sps; x++)
2922  memcpy(track->audio.buf +
2923  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2924  data + x * sps, sps);
2925  }
2926 
2927  if (++track->audio.sub_packet_cnt >= h) {
2928  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2929  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2930  track->audio.sub_packet_cnt = 0;
2931  track->audio.pkt_cnt = h * w / a;
2932  }
2933  }
2934 
2935  while (track->audio.pkt_cnt) {
2936  int ret;
2937  AVPacket pktl, *pkt = &pktl;
2938 
2939  ret = av_new_packet(pkt, a);
2940  if (ret < 0) {
2941  return ret;
2942  }
2943  memcpy(pkt->data,
2944  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2945  a);
2946  pkt->pts = track->audio.buf_timecode;
2948  pkt->pos = pos;
2949  pkt->stream_index = st->index;
2950  ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2951  if (ret < 0) {
2952  av_packet_unref(pkt);
2953  return AVERROR(ENOMEM);
2954  }
2955  }
2956 
2957  return 0;
2958 }
2959 
2960 /* reconstruct full wavpack blocks from mangled matroska ones */
2962  uint8_t **pdst, int *size)
2963 {
2964  uint8_t *dst = NULL;
2965  int dstlen = 0;
2966  int srclen = *size;
2967  uint32_t samples;
2968  uint16_t ver;
2969  int ret, offset = 0;
2970 
2971  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2972  return AVERROR_INVALIDDATA;
2973 
2974  ver = AV_RL16(track->stream->codecpar->extradata);
2975 
2976  samples = AV_RL32(src);
2977  src += 4;
2978  srclen -= 4;
2979 
2980  while (srclen >= 8) {
2981  int multiblock;
2982  uint32_t blocksize;
2983  uint8_t *tmp;
2984 
2985  uint32_t flags = AV_RL32(src);
2986  uint32_t crc = AV_RL32(src + 4);
2987  src += 8;
2988  srclen -= 8;
2989 
2990  multiblock = (flags & 0x1800) != 0x1800;
2991  if (multiblock) {
2992  if (srclen < 4) {
2993  ret = AVERROR_INVALIDDATA;
2994  goto fail;
2995  }
2996  blocksize = AV_RL32(src);
2997  src += 4;
2998  srclen -= 4;
2999  } else
3000  blocksize = srclen;
3001 
3002  if (blocksize > srclen) {
3003  ret = AVERROR_INVALIDDATA;
3004  goto fail;
3005  }
3006 
3007  tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3008  if (!tmp) {
3009  ret = AVERROR(ENOMEM);
3010  goto fail;
3011  }
3012  dst = tmp;
3013  dstlen += blocksize + 32;
3014 
3015  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3016  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3017  AV_WL16(dst + offset + 8, ver); // version
3018  AV_WL16(dst + offset + 10, 0); // track/index_no
3019  AV_WL32(dst + offset + 12, 0); // total samples
3020  AV_WL32(dst + offset + 16, 0); // block index
3021  AV_WL32(dst + offset + 20, samples); // number of samples
3022  AV_WL32(dst + offset + 24, flags); // flags
3023  AV_WL32(dst + offset + 28, crc); // crc
3024  memcpy(dst + offset + 32, src, blocksize); // block data
3025 
3026  src += blocksize;
3027  srclen -= blocksize;
3028  offset += blocksize + 32;
3029  }
3030 
3031  memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3032 
3033  *pdst = dst;
3034  *size = dstlen;
3035 
3036  return 0;
3037 
3038 fail:
3039  av_freep(&dst);
3040  return ret;
3041 }
3042 
3044  uint8_t **pdst, int *size)
3045 {
3046  uint8_t *dst = src;
3047  int dstlen = *size;
3048 
3049  if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3050  dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3051  if (!dst)
3052  return AVERROR(ENOMEM);
3053 
3054  AV_WB32(dst, dstlen);
3055  AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3056  memcpy(dst + 8, src, dstlen);
3057  memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3058  dstlen += 8;
3059  }
3060 
3061  *pdst = dst;
3062  *size = dstlen;
3063 
3064  return 0;
3065 }
3066 
3068  MatroskaTrack *track,
3069  AVStream *st,
3070  uint8_t *data, int data_len,
3071  uint64_t timecode,
3072  uint64_t duration,
3073  int64_t pos)
3074 {
3075  AVPacket pktl, *pkt = &pktl;
3076  uint8_t *id, *settings, *text, *buf;
3077  int id_len, settings_len, text_len;
3078  uint8_t *p, *q;
3079  int err;
3080 
3081  if (data_len <= 0)
3082  return AVERROR_INVALIDDATA;
3083 
3084  p = data;
3085  q = data + data_len;
3086 
3087  id = p;
3088  id_len = -1;
3089  while (p < q) {
3090  if (*p == '\r' || *p == '\n') {
3091  id_len = p - id;
3092  if (*p == '\r')
3093  p++;
3094  break;
3095  }
3096  p++;
3097  }
3098 
3099  if (p >= q || *p != '\n')
3100  return AVERROR_INVALIDDATA;
3101  p++;
3102 
3103  settings = p;
3104  settings_len = -1;
3105  while (p < q) {
3106  if (*p == '\r' || *p == '\n') {
3107  settings_len = p - settings;
3108  if (*p == '\r')
3109  p++;
3110  break;
3111  }
3112  p++;
3113  }
3114 
3115  if (p >= q || *p != '\n')
3116  return AVERROR_INVALIDDATA;
3117  p++;
3118 
3119  text = p;
3120  text_len = q - p;
3121  while (text_len > 0) {
3122  const int len = text_len - 1;
3123  const uint8_t c = p[len];
3124  if (c != '\r' && c != '\n')
3125  break;
3126  text_len = len;
3127  }
3128 
3129  if (text_len <= 0)
3130  return AVERROR_INVALIDDATA;
3131 
3132  err = av_new_packet(pkt, text_len);
3133  if (err < 0) {
3134  return err;
3135  }
3136 
3137  memcpy(pkt->data, text, text_len);
3138 
3139  if (id_len > 0) {
3140  buf = av_packet_new_side_data(pkt,
3142  id_len);
3143  if (!buf) {
3144  av_packet_unref(pkt);
3145  return AVERROR(ENOMEM);
3146  }
3147  memcpy(buf, id, id_len);
3148  }
3149 
3150  if (settings_len > 0) {
3151  buf = av_packet_new_side_data(pkt,
3153  settings_len);
3154  if (!buf) {
3155  av_packet_unref(pkt);
3156  return AVERROR(ENOMEM);
3157  }
3158  memcpy(buf, settings, settings_len);
3159  }
3160 
3161  // Do we need this for subtitles?
3162  // pkt->flags = AV_PKT_FLAG_KEY;
3163 
3164  pkt->stream_index = st->index;
3165  pkt->pts = timecode;
3166 
3167  // Do we need this for subtitles?
3168  // pkt->dts = timecode;
3169 
3170  pkt->duration = duration;
3171  pkt->pos = pos;
3172 
3173  err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3174  if (err < 0) {
3175  av_packet_unref(pkt);
3176  return AVERROR(ENOMEM);
3177  }
3178 
3179  return 0;
3180 }
3181 
3183  MatroskaTrack *track, AVStream *st,
3184  AVBufferRef *buf, uint8_t *data, int pkt_size,
3185  uint64_t timecode, uint64_t lace_duration,
3186  int64_t pos, int is_keyframe,
3187  uint8_t *additional, uint64_t additional_id, int additional_size,
3188  int64_t discard_padding)
3189 {
3190  MatroskaTrackEncoding *encodings = track->encodings.elem;
3191  uint8_t *pkt_data = data;
3192  int res;
3193  AVPacket pktl, *pkt = &pktl;
3194 
3195  if (encodings && !encodings->type && encodings->scope & 1) {
3196  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3197  if (res < 0)
3198  return res;
3199  }
3200 
3201  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3202  uint8_t *wv_data;
3203  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3204  if (res < 0) {
3205  av_log(matroska->ctx, AV_LOG_ERROR,
3206  "Error parsing a wavpack block.\n");
3207  goto fail;
3208  }
3209  if (pkt_data != data)
3210  av_freep(&pkt_data);
3211  pkt_data = wv_data;
3212  }
3213 
3214  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3215  uint8_t *pr_data;
3216  res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3217  if (res < 0) {
3218  av_log(matroska->ctx, AV_LOG_ERROR,
3219  "Error parsing a prores block.\n");
3220  goto fail;
3221  }
3222  if (pkt_data != data)
3223  av_freep(&pkt_data);
3224  pkt_data = pr_data;
3225  }
3226 
3227  av_init_packet(pkt);
3228  if (pkt_data != data)
3229  pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3230  NULL, NULL, 0);
3231  else
3232  pkt->buf = av_buffer_ref(buf);
3233 
3234  if (!pkt->buf) {
3235  res = AVERROR(ENOMEM);
3236  goto fail;
3237  }
3238 
3239  pkt->data = pkt_data;
3240  pkt->size = pkt_size;
3241  pkt->flags = is_keyframe;
3242  pkt->stream_index = st->index;
3243 
3244  if (additional_size > 0) {
3245  uint8_t *side_data = av_packet_new_side_data(pkt,
3247  additional_size + 8);
3248  if (!side_data) {
3249  av_packet_unref(pkt);
3250  return AVERROR(ENOMEM);
3251  }
3252  AV_WB64(side_data, additional_id);
3253  memcpy(side_data + 8, additional, additional_size);
3254  }
3255 
3256  if (discard_padding) {
3257  uint8_t *side_data = av_packet_new_side_data(pkt,
3259  10);
3260  if (!side_data) {
3261  av_packet_unref(pkt);
3262  return AVERROR(ENOMEM);
3263  }
3264  discard_padding = av_rescale_q(discard_padding,
3265  (AVRational){1, 1000000000},
3266  (AVRational){1, st->codecpar->sample_rate});
3267  if (discard_padding > 0) {
3268  AV_WL32(side_data + 4, discard_padding);
3269  } else {
3270  AV_WL32(side_data, -discard_padding);
3271  }
3272  }
3273 
3274  if (track->ms_compat)
3275  pkt->dts = timecode;
3276  else
3277  pkt->pts = timecode;
3278  pkt->pos = pos;
3279  pkt->duration = lace_duration;
3280 
3281 #if FF_API_CONVERGENCE_DURATION
3283  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3284  pkt->convergence_duration = lace_duration;
3285  }
3287 #endif
3288 
3289  res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3290  if (res < 0) {
3291  av_packet_unref(pkt);
3292  return AVERROR(ENOMEM);
3293  }
3294 
3295  return 0;
3296 
3297 fail:
3298  if (pkt_data != data)
3299  av_freep(&pkt_data);
3300  return res;
3301 }
3302 
3304  int size, int64_t pos, uint64_t cluster_time,
3305  uint64_t block_duration, int is_keyframe,
3306  uint8_t *additional, uint64_t additional_id, int additional_size,
3307  int64_t cluster_pos, int64_t discard_padding)
3308 {
3309  uint64_t timecode = AV_NOPTS_VALUE;
3310  MatroskaTrack *track;
3311  int res = 0;
3312  AVStream *st;
3313  int16_t block_time;
3314  uint32_t *lace_size = NULL;
3315  int n, flags, laces = 0;
3316  uint64_t num;
3317  int trust_default_duration = 1;
3318 
3319  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3320  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3321  return n;
3322  }
3323  data += n;
3324  size -= n;
3325 
3326  track = matroska_find_track_by_num(matroska, num);
3327  if (!track || !track->stream) {
3328  av_log(matroska->ctx, AV_LOG_INFO,
3329  "Invalid stream %"PRIu64" or size %u\n", num, size);
3330  return AVERROR_INVALIDDATA;
3331  } else if (size <= 3)
3332  return 0;
3333  st = track->stream;
3334  if (st->discard >= AVDISCARD_ALL)
3335  return res;
3336  av_assert1(block_duration != AV_NOPTS_VALUE);
3337 
3338  block_time = sign_extend(AV_RB16(data), 16);
3339  data += 2;
3340  flags = *data++;
3341  size -= 3;
3342  if (is_keyframe == -1)
3343  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3344 
3345  if (cluster_time != (uint64_t) -1 &&
3346  (block_time >= 0 || cluster_time >= -block_time)) {
3347  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3348  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3349  timecode < track->end_timecode)
3350  is_keyframe = 0; /* overlapping subtitles are not key frame */
3351  if (is_keyframe) {
3352  ff_reduce_index(matroska->ctx, st->index);
3353  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3355  }
3356  }
3357 
3358  if (matroska->skip_to_keyframe &&
3359  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3360  // Compare signed timecodes. Timecode may be negative due to codec delay
3361  // offset. We don't support timestamps greater than int64_t anyway - see
3362  // AVPacket's pts.
3363  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3364  return res;
3365  if (is_keyframe)
3366  matroska->skip_to_keyframe = 0;
3367  else if (!st->skip_to_keyframe) {
3368  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3369  matroska->skip_to_keyframe = 0;
3370  }
3371  }
3372 
3373  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3374  &lace_size, &laces);
3375 
3376  if (res)
3377  goto end;
3378 
3379  if (track->audio.samplerate == 8000) {
3380  // If this is needed for more codecs, then add them here
3381  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3382  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3383  trust_default_duration = 0;
3384  }
3385  }
3386 
3387  if (!block_duration && trust_default_duration)
3388  block_duration = track->default_duration * laces / matroska->time_scale;
3389 
3390  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3391  track->end_timecode =
3392  FFMAX(track->end_timecode, timecode + block_duration);
3393 
3394  for (n = 0; n < laces; n++) {
3395  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3396 
3397  if (lace_size[n] > size) {
3398  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3399  break;
3400  }
3401 
3402  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3406  st->codecpar->block_align && track->audio.sub_packet_size) {
3407  res = matroska_parse_rm_audio(matroska, track, st, data,
3408  lace_size[n],
3409  timecode, pos);
3410  if (res)
3411  goto end;
3412 
3413  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3414  res = matroska_parse_webvtt(matroska, track, st,
3415  data, lace_size[n],
3416  timecode, lace_duration,
3417  pos);
3418  if (res)
3419  goto end;
3420  } else {
3421  res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3422  timecode, lace_duration, pos,
3423  !n ? is_keyframe : 0,
3424  additional, additional_id, additional_size,
3425  discard_padding);
3426  if (res)
3427  goto end;
3428  }
3429 
3430  if (timecode != AV_NOPTS_VALUE)
3431  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3432  data += lace_size[n];
3433  size -= lace_size[n];
3434  }
3435 
3436 end:
3437  av_free(lace_size);
3438  return res;
3439 }
3440 
3442 {
3443  EbmlList *blocks_list;
3444  MatroskaBlock *blocks;
3445  int i, res;
3446  res = ebml_parse(matroska,
3447  matroska_cluster_incremental_parsing,
3448  &matroska->current_cluster);
3449  if (res == 1) {
3450  /* New Cluster */
3451  if (matroska->current_cluster_pos)
3452  ebml_level_end(matroska);
3453  ebml_free(matroska_cluster, &matroska->current_cluster);
3454  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3455  matroska->current_cluster_num_blocks = 0;
3456  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3457  /* sizeof the ID which was already read */
3458  if (matroska->current_id)
3459  matroska->current_cluster_pos -= 4;
3460  res = ebml_parse(matroska,
3461  matroska_clusters_incremental,
3462  &matroska->current_cluster);
3463  /* Try parsing the block again. */
3464  if (res == 1)
3465  res = ebml_parse(matroska,
3466  matroska_cluster_incremental_parsing,
3467  &matroska->current_cluster);
3468  }
3469 
3470  if (!res &&
3471  matroska->current_cluster_num_blocks <
3472  matroska->current_cluster.blocks.nb_elem) {
3473  blocks_list = &matroska->current_cluster.blocks;
3474  blocks = blocks_list->elem;
3475 
3476  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3477  i = blocks_list->nb_elem - 1;
3478  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3479  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3480  uint8_t* additional = blocks[i].additional.size > 0 ?
3481  blocks[i].additional.data : NULL;
3482  if (!blocks[i].non_simple)
3483  blocks[i].duration = 0;
3484  res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3485  blocks[i].bin.size, blocks[i].bin.pos,
3486  matroska->current_cluster.timecode,
3487  blocks[i].duration, is_keyframe,
3488  additional, blocks[i].additional_id,
3489  blocks[i].additional.size,
3490  matroska->current_cluster_pos,
3491  blocks[i].discard_padding);
3492  }
3493  }
3494 
3495  return res;
3496 }
3497 
3499 {
3500  MatroskaCluster cluster = { 0 };
3501  EbmlList *blocks_list;
3502  MatroskaBlock *blocks;
3503  int i, res;
3504  int64_t pos;
3505 
3506  if (!matroska->contains_ssa)
3507  return matroska_parse_cluster_incremental(matroska);
3508  pos = avio_tell(matroska->ctx->pb);
3509  if (matroska->current_id)
3510  pos -= 4; /* sizeof the ID which was already read */
3511  res = ebml_parse(matroska, matroska_clusters, &cluster);
3512  blocks_list = &cluster.blocks;
3513  blocks = blocks_list->elem;
3514  for (i = 0; i < blocks_list->nb_elem; i++)
3515  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3516  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3517  res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3518  blocks[i].bin.size, blocks[i].bin.pos,
3519  cluster.timecode, blocks[i].duration,
3520  is_keyframe, NULL, 0, 0, pos,
3521  blocks[i].discard_padding);
3522  }
3523  ebml_free(matroska_cluster, &cluster);
3524  return res;
3525 }
3526 
3528 {
3529  MatroskaDemuxContext *matroska = s->priv_data;
3530  int ret = 0;
3531 
3532  while (matroska_deliver_packet(matroska, pkt)) {
3533  int64_t pos = avio_tell(matroska->ctx->pb);
3534  if (matroska->done)
3535  return (ret < 0) ? ret : AVERROR_EOF;
3536  if (matroska_parse_cluster(matroska) < 0)
3537  ret = matroska_resync(matroska, pos);
3538  }
3539 
3540  return ret;
3541 }
3542 
3543 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3544  int64_t timestamp, int flags)
3545 {
3546  MatroskaDemuxContext *matroska = s->priv_data;
3547  MatroskaTrack *tracks = NULL;
3548  AVStream *st = s->streams[stream_index];
3549  int i, index, index_min;
3550 
3551  /* Parse the CUES now since we need the index data to seek. */
3552  if (matroska->cues_parsing_deferred > 0) {
3553  matroska->cues_parsing_deferred = 0;
3554  matroska_parse_cues(matroska);
3555  }
3556 
3557  if (!st->nb_index_entries)
3558  goto err;
3559  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3560 
3561  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3562  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3563  SEEK_SET);
3564  matroska->current_id = 0;
3565  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3566  matroska_clear_queue(matroska);
3567  if (matroska_parse_cluster(matroska) < 0)
3568  break;
3569  }
3570  }
3571 
3572  matroska_clear_queue(matroska);
3573  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3574  goto err;
3575 
3576  index_min = index;
3577  tracks = matroska->tracks.elem;
3578  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3579  tracks[i].audio.pkt_cnt = 0;
3580  tracks[i].audio.sub_packet_cnt = 0;
3581  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3582  tracks[i].end_timecode = 0;
3583  }
3584 
3585  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3586  matroska->current_id = 0;
3587  if (flags & AVSEEK_FLAG_ANY) {
3588  st->skip_to_keyframe = 0;
3589  matroska->skip_to_timecode = timestamp;
3590  } else {
3591  st->skip_to_keyframe = 1;
3592  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3593  }
3594  matroska->skip_to_keyframe = 1;
3595  matroska->done = 0;
3596  matroska->num_levels = 0;
3597  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3598  return 0;
3599 err:
3600  // slightly hackish but allows proper fallback to
3601  // the generic seeking code.
3602  matroska_clear_queue(matroska);
3603  matroska->current_id = 0;
3604  st->skip_to_keyframe =
3605  matroska->skip_to_keyframe = 0;
3606  matroska->done = 0;
3607  matroska->num_levels = 0;
3608  return -1;
3609 }
3610 
3612 {
3613  MatroskaDemuxContext *matroska = s->priv_data;
3614  MatroskaTrack *tracks = matroska->tracks.elem;
3615  int n;
3616 
3617  matroska_clear_queue(matroska);
3618 
3619  for (n = 0; n < matroska->tracks.nb_elem; n++)
3620  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3621  av_freep(&tracks[n].audio.buf);
3622  ebml_free(matroska_cluster, &matroska->current_cluster);
3623  ebml_free(matroska_segment, matroska);
3624 
3625  return 0;
3626 }
3627 
3628 typedef struct {
3629  int64_t start_time_ns;
3630  int64_t end_time_ns;
3631  int64_t start_offset;
3632  int64_t end_offset;
3633 } CueDesc;
3634 
3635 /* This function searches all the Cues and returns the CueDesc corresponding to
3636  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3637  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3638  */
3639 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3640  MatroskaDemuxContext *matroska = s->priv_data;
3641  CueDesc cue_desc;
3642  int i;
3643  int nb_index_entries = s->streams[0]->nb_index_entries;
3644  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3645  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3646  for (i = 1; i < nb_index_entries; i++) {
3647  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3648  index_entries[i].timestamp * matroska->time_scale > ts) {
3649  break;
3650  }
3651  }
3652  --i;
3653  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3654  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3655  if (i != nb_index_entries - 1) {
3656  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3657  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3658  } else {
3659  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3660  // FIXME: this needs special handling for files where Cues appear
3661  // before Clusters. the current logic assumes Cues appear after
3662  // Clusters.
3663  cue_desc.end_offset = cues_start - matroska->segment_start;
3664  }
3665  return cue_desc;
3666 }
3667 
3669 {
3670  MatroskaDemuxContext *matroska = s->priv_data;
3671  int64_t cluster_pos, before_pos;
3672  int index, rv = 1;
3673  if (s->streams[0]->nb_index_entries <= 0) return 0;
3674  // seek to the first cluster using cues.
3675  index = av_index_search_timestamp(s->streams[0], 0, 0);
3676  if (index < 0) return 0;
3677  cluster_pos = s->streams[0]->index_entries[index].pos;
3678  before_pos = avio_tell(s->pb);
3679  while (1) {
3680  int64_t cluster_id = 0, cluster_length = 0;
3681  AVPacket *pkt;
3682  avio_seek(s->pb, cluster_pos, SEEK_SET);
3683  // read cluster id and length
3684  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3685  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3686  if (cluster_id != 0xF43B675) { // done with all clusters
3687  break;
3688  }
3689  avio_seek(s->pb, cluster_pos, SEEK_SET);
3690  matroska->current_id = 0;
3691  matroska_clear_queue(matroska);
3692  if (matroska_parse_cluster(matroska) < 0 ||
3693  !matroska->queue) {
3694  break;
3695  }
3696  pkt = &matroska->queue->pkt;
3697  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3698  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3699  rv = 0;
3700  break;
3701  }
3702  }
3703  avio_seek(s->pb, before_pos, SEEK_SET);
3704  return rv;
3705 }
3706 
3707 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3708  double min_buffer, double* buffer,
3709  double* sec_to_download, AVFormatContext *s,
3710  int64_t cues_start)
3711 {
3712  double nano_seconds_per_second = 1000000000.0;
3713  double time_sec = time_ns / nano_seconds_per_second;
3714  int rv = 0;
3715  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3716  int64_t end_time_ns = time_ns + time_to_search_ns;
3717  double sec_downloaded = 0.0;
3718  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3719  if (desc_curr.start_time_ns == -1)
3720  return -1;
3721  *sec_to_download = 0.0;
3722 
3723  // Check for non cue start time.
3724  if (time_ns > desc_curr.start_time_ns) {
3725  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3726  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3727  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3728  double timeToDownload = (cueBytes * 8.0) / bps;
3729 
3730  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3731  *sec_to_download += timeToDownload;
3732 
3733  // Check if the search ends within the first cue.
3734  if (desc_curr.end_time_ns >= end_time_ns) {
3735  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3736  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3737  sec_downloaded = percent_to_sub * sec_downloaded;
3738  *sec_to_download = percent_to_sub * *sec_to_download;
3739  }
3740 
3741  if ((sec_downloaded + *buffer) <= min_buffer) {
3742  return 1;
3743  }
3744 
3745  // Get the next Cue.
3746  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3747  }
3748 
3749  while (desc_curr.start_time_ns != -1) {
3750  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3751  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3752  double desc_sec = desc_ns / nano_seconds_per_second;
3753  double bits = (desc_bytes * 8.0);
3754  double time_to_download = bits / bps;
3755 
3756  sec_downloaded += desc_sec - time_to_download;
3757  *sec_to_download += time_to_download;
3758 
3759  if (desc_curr.end_time_ns >= end_time_ns) {
3760  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3761  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3762  sec_downloaded = percent_to_sub * sec_downloaded;
3763  *sec_to_download = percent_to_sub * *sec_to_download;
3764 
3765  if ((sec_downloaded + *buffer) <= min_buffer)
3766  rv = 1;
3767  break;
3768  }
3769 
3770  if ((sec_downloaded + *buffer) <= min_buffer) {
3771  rv = 1;
3772  break;
3773  }
3774 
3775  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3776  }
3777  *buffer = *buffer + sec_downloaded;
3778  return rv;
3779 }
3780 
3781 /* This function computes the bandwidth of the WebM file with the help of
3782  * buffer_size_after_time_downloaded() function. Both of these functions are
3783  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3784  * Matroska parsing mechanism.
3785  *
3786  * Returns the bandwidth of the file on success; -1 on error.
3787  * */
3788 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3789 {
3790  MatroskaDemuxContext *matroska = s->priv_data;
3791  AVStream *st = s->streams[0];
3792  double bandwidth = 0.0;
3793  int i;
3794 
3795  for (i = 0; i < st->nb_index_entries; i++) {
3796  int64_t prebuffer_ns = 1000000000;
3797  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3798  double nano_seconds_per_second = 1000000000.0;
3799  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3800  double prebuffer_bytes = 0.0;
3801  int64_t temp_prebuffer_ns = prebuffer_ns;
3802  int64_t pre_bytes, pre_ns;
3803  double pre_sec, prebuffer, bits_per_second;
3804  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3805 
3806  // Start with the first Cue.
3807  CueDesc desc_end = desc_beg;
3808 
3809  // Figure out how much data we have downloaded for the prebuffer. This will
3810  // be used later to adjust the bits per sample to try.
3811  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3812  // Prebuffered the entire Cue.
3813  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3814  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3815  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3816  }
3817  if (desc_end.start_time_ns == -1) {
3818  // The prebuffer is larger than the duration.
3819  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3820  return -1;
3821  bits_per_second = 0.0;
3822  } else {
3823  // The prebuffer ends in the last Cue. Estimate how much data was
3824  // prebuffered.
3825  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3826  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3827  pre_sec = pre_ns / nano_seconds_per_second;
3828  prebuffer_bytes +=
3829  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3830 
3831  prebuffer = prebuffer_ns / nano_seconds_per_second;
3832 
3833  // Set this to 0.0 in case our prebuffer buffers the entire video.
3834  bits_per_second = 0.0;
3835  do {
3836  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3837  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3838  double desc_sec = desc_ns / nano_seconds_per_second;
3839  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3840 
3841  // Drop the bps by the percentage of bytes buffered.
3842  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3843  double mod_bits_per_second = calc_bits_per_second * percent;
3844 
3845  if (prebuffer < desc_sec) {
3846  double search_sec =
3847  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3848 
3849  // Add 1 so the bits per second should be a little bit greater than file
3850  // datarate.
3851  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3852  const double min_buffer = 0.0;
3853  double buffer = prebuffer;
3854  double sec_to_download = 0.0;
3855 
3856  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3857  min_buffer, &buffer, &sec_to_download,
3858  s, cues_start);
3859  if (rv < 0) {
3860  return -1;
3861  } else if (rv == 0) {
3862  bits_per_second = (double)(bps);
3863  break;
3864  }
3865  }
3866 
3867  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3868  } while (desc_end.start_time_ns != -1);
3869  }
3870  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3871  }
3872  return (int64_t)bandwidth;
3873 }
3874 
3875 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3876 {
3877  MatroskaDemuxContext *matroska = s->priv_data;
3878  EbmlList *seekhead_list = &matroska->seekhead;
3879  MatroskaSeekhead *seekhead = seekhead_list->elem;
3880  char *buf;
3881  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3882  int i;
3883  int end = 0;
3884 
3885  // determine cues start and end positions
3886  for (i = 0; i < seekhead_list->nb_elem; i++)
3887  if (seekhead[i].id == MATROSKA_ID_CUES)
3888  break;
3889 
3890  if (i >= seekhead_list->nb_elem) return -1;
3891 
3892  before_pos = avio_tell(matroska->ctx->pb);
3893  cues_start = seekhead[i].pos + matroska->segment_start;
3894  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3895  // cues_end is computed as cues_start + cues_length + length of the
3896  // Cues element ID + EBML length of the Cues element. cues_end is
3897  // inclusive and the above sum is reduced by 1.
3898  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3899  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3900  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3901  cues_end = cues_start + cues_length + bytes_read - 1;
3902  }
3903  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3904  if (cues_start == -1 || cues_end == -1) return -1;
3905 
3906  // parse the cues
3907  matroska_parse_cues(matroska);
3908 
3909  // cues start
3910  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3911 
3912  // cues end
3913  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3914 
3915  // if the file has cues at the start, fix up the init range so tht
3916  // it does not include it
3917  if (cues_start <= init_range)
3918  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3919 
3920  // bandwidth
3921  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3922  if (bandwidth < 0) return -1;
3923  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3924 
3925  // check if all clusters start with key frames
3927 
3928  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3929  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3930  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3931  if (!buf) return -1;
3932  strcpy(buf, "");
3933  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3934  int ret = snprintf(buf + end, 20 * sizeof(char),
3935  "%" PRId64, s->streams[0]->index_entries[i].timestamp);
3936  if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3937  av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3938  av_free(buf);
3939  return AVERROR_INVALIDDATA;
3940  }
3941  end += ret;
3942  if (i != s->streams[0]->nb_index_entries - 1) {
3943  strncat(buf, ",", sizeof(char));
3944  end++;
3945  }
3946  }
3947  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3948  av_free(buf);
3949 
3950  return 0;
3951 }
3952 
3954 {
3955  char *buf;
3956  int ret = matroska_read_header(s);
3957  int64_t init_range;
3958  MatroskaTrack *tracks;
3959  MatroskaDemuxContext *matroska = s->priv_data;
3960  if (ret) {
3961  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3962  return -1;
3963  }
3964  if (!s->nb_streams) {
3966  av_log(s, AV_LOG_ERROR, "No streams found\n");
3967  return AVERROR_INVALIDDATA;
3968  }
3969 
3970  if (!matroska->is_live) {
3971  buf = av_asprintf("%g", matroska->duration);
3972  if (!buf) return AVERROR(ENOMEM);
3973  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3974  av_free(buf);
3975 
3976  // initialization range
3977  // 5 is the offset of Cluster ID.
3978  init_range = avio_tell(s->pb) - 5;
3979  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3980  }
3981 
3982  // basename of the file
3983  buf = strrchr(s->url, '/');
3984  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
3985 
3986  // track number
3987  tracks = matroska->tracks.elem;
3988  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3989 
3990  // parse the cues and populate Cue related fields
3991  if (!matroska->is_live) {
3992  ret = webm_dash_manifest_cues(s, init_range);
3993  if (ret < 0) {
3994  av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
3995  return ret;
3996  }
3997  }
3998 
3999  // use the bandwidth from the command line if it was provided
4000  if (matroska->bandwidth > 0) {
4002  matroska->bandwidth, 0);
4003  }
4004  return 0;
4005 }
4006 
4008 {
4009  return AVERROR_EOF;
4010 }
4011 
4012 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4013 static const AVOption options[] = {
4014  { "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 },
4015  { "bandwidth", "bandwidth of this stream to be specified in the DASH manifest.", OFFSET(bandwidth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
4016  { NULL },
4017 };
4018 
4019 static const AVClass webm_dash_class = {
4020  .class_name = "WebM DASH Manifest demuxer",
4021  .item_name = av_default_item_name,
4022  .option = options,
4023  .version = LIBAVUTIL_VERSION_INT,
4024 };
4025 
4027  .name = "matroska,webm",
4028  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4029  .extensions = "mkv,mk3d,mka,mks",
4030  .priv_data_size = sizeof(MatroskaDemuxContext),
4036  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4037 };
4038 
4040  .name = "webm_dash_manifest",
4041  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4042  .priv_data_size = sizeof(MatroskaDemuxContext),
4046  .priv_class = &webm_dash_class,
4047 };
int32_t pitch
Rotation around the right vector [-90, 90].
Definition: spherical.h:127
#define MATROSKA_ID_SEEKPREROLL
Definition: matroska.h:95
const char * s
Definition: matroskadec.c:95
#define MATROSKA_ID_VIDEOPROJECTIONPOSEYAW
Definition: matroska.h:159
AVSphericalMapping * av_spherical_alloc(size_t *size)
Allocate a AVSphericalVideo structure and initialize its fields to default values.
Definition: spherical.c:24
uint64_t codec_delay_in_track_tb
Definition: matroskadec.c:235
enum AVChromaLocation chroma_location
Definition: avcodec.h:3974
#define AV_DISPOSITION_METADATA
Definition: avformat.h:856
#define NULL
Definition: coverity.c:32
#define MATROSKA_ID_BLOCKADDID
Definition: matroska.h:230
#define MATROSKA_ID_TRACKDEFAULTDURATION
Definition: matroska.h:104
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:3965
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
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:2883
Bytestream IO Context.
Definition: avio.h:161
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:3972
#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:697
uint64_t seek_preroll
Definition: matroskadec.c:229
const char *const ff_matroska_video_stereo_plane[MATROSKA_VIDEO_STEREO_PLANE_COUNT]
Definition: matroska.c:149
static const EbmlSyntax matroska_simpletag[]
Definition: matroskadec.c:628
static void matroska_convert_tags(AVFormatContext *s)
Definition: matroskadec.c:1514
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1299
uint64_t type
Definition: matroskadec.c:220
static const EbmlSyntax matroska_tracks[]
Definition: matroskadec.c:556
unsigned MaxCLL
Max content light level (cd/m^2).
#define MATROSKA_ID_TRACKFLAGLACING
Definition: matroska.h:101
static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: matroskadec.c:4007
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2742
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:113
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
AVInputFormat ff_matroska_demuxer
Definition: matroskadec.c:4026
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:52
int ff_packet_list_put(AVPacketList **head, AVPacketList **tail, AVPacket *pkt, int flags)
Append an AVPacket to the list.
Definition: utils.c:447
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:2038
AVPacketList * queue
Definition: matroskadec.c:342
#define MATROSKA_ID_VIDEOPROJECTIONPOSEROLL
Definition: matroska.h:161
static const EbmlSyntax matroska_info[]
Definition: matroskadec.c:398
#define MATROSKA_ID_CUETRACKPOSITION
Definition: matroska.h:192
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3123
#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:210
uint64_t display_unit
Definition: matroskadec.c:182
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int ebml_level_end(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:798
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define INITIALIZATION_RANGE
Definition: matroska.h:370
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1450
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:1024
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3668
else temp
Definition: vf_mcdeint.c:256
static const EbmlSyntax matroska_tagtargets[]
Definition: matroskadec.c:638
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:4827
int64_t pos
Definition: avformat.h:803
#define MATROSKA_ID_ENCODINGTYPE
Definition: matroska.h:173
#define MATROSKA_ID_AUDIOBITDEPTH
Definition: matroska.h:167
uint64_t chapteruid
Definition: matroskadec.c:286
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:450
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2504
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:377
EbmlList tag
Definition: matroskadec.c:292
uint64_t uid
Definition: matroskadec.c:219
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
MatroskaCluster current_cluster
Definition: matroskadec.c:360
uint32_t fourcc
Definition: vaapi_decode.c:236
Video represents a portion of a sphere mapped on a flat surface using equirectangular projection...
Definition: spherical.h:72
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
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:936
#define MATROSKA_ID_TAGTARGETS_ATTACHUID
Definition: matroska.h:214
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1431
#define MATROSKA_ID_CLUSTERPOSITION
Definition: matroska.h:225
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:246
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1103
MatroskaTrackVideoProjection projection
Definition: matroskadec.c:188
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:237
uint64_t flag_forced
Definition: matroskadec.c:228
int av_log2(unsigned v)
Definition: intmath.c:26
uint64_t max_size
Definition: matroskadec.c:114
#define MATROSKA_ID_TRACKTYPE
Definition: matroska.h:80
#define MATROSKA_ID_TAGTARGETS_CHAPTERUID
Definition: matroska.h:213
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
uint64_t flag_default
Definition: matroskadec.c:227
#define MATROSKA_ID_VIDEOCOLOR_RX
Definition: matroska.h:145
Video represents a sphere mapped on a flat surface using equirectangular projection.
Definition: spherical.h:56
#define MATROSKA_ID_VIDEOASPECTRATIO
Definition: matroska.h:125
static const EbmlSyntax matroska_track_encodings[]
Definition: matroskadec.c:505
#define MATROSKA_ID_MUXINGAPP
Definition: matroska.h:70
#define MATROSKA_ID_AUDIOCHANNELS
Definition: matroska.h:168
char * name
Definition: matroskadec.c:275
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
int has_primaries
Flag indicating whether the display primaries (and white point) are set.
const char * key
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:236
discard all
Definition: avcodec.h:794
#define MATROSKA_ID_VIDEOPROJECTIONTYPE
Definition: matroska.h:157
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:322
static AVPacket pkt
#define MATROSKA_ID_CUECLUSTERPOSITION
Definition: matroska.h:196
#define MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX
Definition: matroska.h:153
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:786
MatroskaTrackAudio audio
Definition: matroskadec.c:231
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:373
#define src
Definition: vp8dsp.c:254
const struct EbmlSyntax * n
Definition: matroskadec.c:96
#define MATROSKA_ID_EDITIONFLAGDEFAULT
Definition: matroska.h:260
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:224
#define EBML_ID_DOCTYPE
Definition: matroska.h:40
#define MATROSKA_ID_ENCODINGENCALGO
Definition: matroska.h:180
#define MATROSKA_ID_CHAPTERTIMEEND
Definition: matroska.h:253
enum AVColorSpace color_space
Definition: avcodec.h:3973
static const EbmlSyntax matroska_track_plane[]
Definition: matroskadec.c:510
#define MATROSKA_ID_TRACKCONTENTENCODINGS
Definition: matroska.h:105
int frame_size
Audio only.
Definition: avcodec.h:4005
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1325
#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:4584
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:243
Format I/O context.
Definition: avformat.h:1351
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:278
UID uid
Definition: mxfenc.c:2116
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:1952
#define MATROSKA_ID_TRACKCONTENTENCODING
Definition: matroska.h:106
static const EbmlSyntax matroska_cluster[]
Definition: matroskadec.c:709
#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:238
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3953
static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
Definition: matroskadec.c:899
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1966
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1484
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:247
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:603
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1123
uint64_t pixel_height
Definition: matroskadec.c:180
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
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:256
#define av_malloc(s)
uint64_t stereo_mode
Definition: matroskadec.c:185
MatroskaTrackOperation operation
Definition: matroskadec.c:232
MatroskaTrackVideo video
Definition: matroskadec.c:230
#define MATROSKA_ID_EDITIONFLAGORDERED
Definition: matroska.h:261
static const EbmlSyntax matroska_track_video_projection[]
Definition: matroskadec.c:441
int width
Video only.
Definition: avcodec.h:3950
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3639
static const AVProfile aac_profiles[]
void * elem
Definition: matroskadec.c:102
AVOptions.
#define MATROSKA_ID_TRACKLANGUAGE
Definition: matroska.h:97
MatroskaTrackCompression compression
Definition: matroskadec.c:133
uint8_t * data
Definition: matroskadec.c:108
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:75
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
AVPacket pkt
Definition: avformat.h:2016
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
uint64_t time
Definition: matroskadec.c:270
int ff_mkv_stereo3d_conv(AVStream *st, MatroskaVideoStereoModeType stereo_mode)
Definition: matroska.c:155
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src, uint8_t **pdst, int *size)
Definition: matroskadec.c:3043
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
#define MATROSKA_ID_VIDEOPIXELCROPT
Definition: matroska.h:117
static const EbmlSyntax matroska_track_video_color[]
Definition: matroskadec.c:423
#define TRACK_NUMBER
Definition: matroska.h:378
#define MATROSKA_ID_TIMECODESCALE
Definition: matroska.h:66
static int matroska_aac_sri(int samplerate)
Definition: matroskadec.c:1721
enum AVStreamParseType need_parsing
Definition: avformat.h:1092
#define MATROSKA_ID_VIDEOCOLORCBSUBVERT
Definition: matroska.h:134
#define MATROSKA_ID_SIMPLEBLOCK
Definition: matroska.h:232
#define MATROSKA_ID_TAGTARGETS_TYPEVALUE
Definition: matroska.h:211
#define MATROSKA_ID_EDITIONFLAGHIDDEN
Definition: matroska.h:259
#define AV_LZO_OUTPUT_PADDING
Definition: lzo.h:47
static const EbmlSyntax matroska_segment[]
Definition: matroskadec.c:669
AVStream * stream
Definition: matroskadec.c:252
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4456
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:224
#define MATROSKA_ID_BLOCKMORE
Definition: matroska.h:229
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:1419
int64_t duration
Definition: movenc.c:63
#define MATROSKA_ID_CUERELATIVEPOSITION
Definition: matroska.h:197
#define MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
Definition: matroska.h:165
#define MATROSKA_ID_VIDEOCOLOR
Definition: matroska.h:127
int initial_padding
Audio only.
Definition: avcodec.h:4013
static const EbmlSyntax matroska_segments[]
Definition: matroskadec.c:681
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:1482
uint8_t * data
Definition: avcodec.h:1430
uint64_t typevalue
Definition: matroskadec.c:284
uint64_t codec_delay
Definition: matroskadec.c:234
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3441
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:189
static const struct @283 planes[]
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:258
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:228
uint32_t tag
Definition: movenc.c:1455
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:623
int64_t start_time_ns
Definition: matroskadec.c:3629
#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:178
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:358
static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track)
Definition: matroskadec.c:1844
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:922
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
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
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218