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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;
108  int64_t pos;
109 } EbmlBin;
110 
111 typedef struct Ebml {
112  uint64_t version;
113  uint64_t max_size;
114  uint64_t id_length;
115  char *doctype;
116  uint64_t doctype_version;
117 } Ebml;
118 
119 typedef struct MatroskaTrackCompression {
120  uint64_t algo;
123 
124 typedef struct MatroskaTrackEncryption {
125  uint64_t algo;
128 
129 typedef struct MatroskaTrackEncoding {
130  uint64_t scope;
131  uint64_t type;
135 
136 typedef struct MatroskaMasteringMeta {
137  double r_x;
138  double r_y;
139  double g_x;
140  double g_y;
141  double b_x;
142  double b_y;
143  double white_x;
144  double white_y;
148 
149 typedef struct MatroskaTrackVideoColor {
152  uint64_t chroma_sub_horz;
153  uint64_t chroma_sub_vert;
154  uint64_t cb_sub_horz;
155  uint64_t cb_sub_vert;
158  uint64_t range;
160  uint64_t primaries;
161  uint64_t max_cll;
162  uint64_t max_fall;
165 
167  uint64_t type;
168  EbmlBin private;
169  double yaw;
170  double pitch;
171  double roll;
173 
174 typedef struct MatroskaTrackVideo {
175  double frame_rate;
176  uint64_t display_width;
177  uint64_t display_height;
178  uint64_t pixel_width;
179  uint64_t pixel_height;
181  uint64_t display_unit;
182  uint64_t interlaced;
183  uint64_t field_order;
184  uint64_t stereo_mode;
185  uint64_t alpha_mode;
189 
190 typedef struct MatroskaTrackAudio {
191  double samplerate;
193  uint64_t bitdepth;
194  uint64_t channels;
195 
196  /* real audio header (extracted from extradata) */
202  int pkt_cnt;
203  uint64_t buf_timecode;
206 
207 typedef struct MatroskaTrackPlane {
208  uint64_t uid;
209  uint64_t type;
211 
212 typedef struct MatroskaTrackOperation {
215 
216 typedef struct MatroskaTrack {
217  uint64_t num;
218  uint64_t uid;
219  uint64_t type;
220  char *name;
221  char *codec_id;
223  char *language;
224  double time_scale;
226  uint64_t flag_default;
227  uint64_t flag_forced;
228  uint64_t seek_preroll;
233  uint64_t codec_delay;
235 
237  int64_t end_timecode;
240 
243 } MatroskaTrack;
244 
245 typedef struct MatroskaAttachment {
246  uint64_t uid;
247  char *filename;
248  char *mime;
250 
253 
254 typedef struct MatroskaChapter {
255  uint64_t start;
256  uint64_t end;
257  uint64_t uid;
258  char *title;
259 
262 
263 typedef struct MatroskaIndexPos {
264  uint64_t track;
265  uint64_t pos;
267 
268 typedef struct MatroskaIndex {
269  uint64_t time;
271 } MatroskaIndex;
272 
273 typedef struct MatroskaTag {
274  char *name;
275  char *string;
276  char *lang;
277  uint64_t def;
279 } MatroskaTag;
280 
281 typedef struct MatroskaTagTarget {
282  char *type;
283  uint64_t typevalue;
284  uint64_t trackuid;
285  uint64_t chapteruid;
286  uint64_t attachuid;
288 
289 typedef struct MatroskaTags {
292 } MatroskaTags;
293 
294 typedef struct MatroskaSeekhead {
295  uint64_t id;
296  uint64_t pos;
298 
299 typedef struct MatroskaLevel {
300  uint64_t start;
301  uint64_t length;
302 } MatroskaLevel;
303 
304 typedef struct MatroskaCluster {
305  uint64_t timecode;
308 
309 typedef struct MatroskaLevel1Element {
310  uint64_t id;
311  uint64_t pos;
312  int parsed;
314 
315 typedef struct MatroskaDemuxContext {
316  const AVClass *class;
318 
319  /* EBML stuff */
322  int level_up;
323  uint32_t current_id;
324 
325  uint64_t time_scale;
326  double duration;
327  char *title;
328  char *muxingapp;
336 
337  /* byte position of the segment inside the stream */
338  int64_t segment_start;
339 
340  /* 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  av_fast_padded_malloc(&bin->data, &bin->size, length);
967  if (!bin->data)
968  return AVERROR(ENOMEM);
969 
970  bin->size = length;
971  bin->pos = avio_tell(pb);
972  if (avio_read(pb, bin->data, length) != length) {
973  av_freep(&bin->data);
974  bin->size = 0;
975  return AVERROR(EIO);
976  }
977 
978  return 0;
979 }
980 
981 /*
982  * Read the next element, but only the header. The contents
983  * are supposed to be sub-elements which can be read separately.
984  * 0 is success, < 0 is failure.
985  */
986 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
987 {
988  AVIOContext *pb = matroska->ctx->pb;
990 
991  if (matroska->num_levels >= EBML_MAX_DEPTH) {
992  av_log(matroska->ctx, AV_LOG_ERROR,
993  "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
994  return AVERROR(ENOSYS);
995  }
996 
997  level = &matroska->levels[matroska->num_levels++];
998  level->start = avio_tell(pb);
999  level->length = length;
1000 
1001  return 0;
1002 }
1003 
1004 /*
1005  * Read signed/unsigned "EBML" numbers.
1006  * Return: number of bytes processed, < 0 on error
1007  */
1009  uint8_t *data, uint32_t size, uint64_t *num)
1010 {
1011  AVIOContext pb;
1012  ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1013  return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1014 }
1015 
1016 /*
1017  * Same as above, but signed.
1018  */
1020  uint8_t *data, uint32_t size, int64_t *num)
1021 {
1022  uint64_t unum;
1023  int res;
1024 
1025  /* read as unsigned number first */
1026  if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1027  return res;
1028 
1029  /* make signed (weird way) */
1030  *num = unum - ((1LL << (7 * res - 1)) - 1);
1031 
1032  return res;
1033 }
1034 
1035 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1036  EbmlSyntax *syntax, void *data);
1037 
1038 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1039  uint32_t id, void *data)
1040 {
1041  int i;
1042  for (i = 0; syntax[i].id; i++)
1043  if (id == syntax[i].id)
1044  break;
1045  if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1046  matroska->num_levels > 0 &&
1047  matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1048  return 0; // we reached the end of an unknown size cluster
1049  if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1050  av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1051  }
1052  return ebml_parse_elem(matroska, &syntax[i], data);
1053 }
1054 
1055 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1056  void *data)
1057 {
1058  if (!matroska->current_id) {
1059  uint64_t id;
1060  int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1061  if (res < 0) {
1062  // in live mode, finish parsing if EOF is reached.
1063  return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1064  res == AVERROR_EOF) ? 1 : res;
1065  }
1066  matroska->current_id = id | 1 << 7 * res;
1067  }
1068  return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1069 }
1070 
1071 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1072  void *data)
1073 {
1074  int i, res = 0;
1075 
1076  for (i = 0; syntax[i].id; i++)
1077  switch (syntax[i].type) {
1078  case EBML_SINT:
1079  *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1080  break;
1081  case EBML_UINT:
1082  *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1083  break;
1084  case EBML_FLOAT:
1085  *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1086  break;
1087  case EBML_STR:
1088  case EBML_UTF8:
1089  // the default may be NULL
1090  if (syntax[i].def.s) {
1091  uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1092  *dst = av_strdup(syntax[i].def.s);
1093  if (!*dst)
1094  return AVERROR(ENOMEM);
1095  }
1096  break;
1097  }
1098 
1099  while (!res && !ebml_level_end(matroska))
1100  res = ebml_parse(matroska, syntax, data);
1101 
1102  return res;
1103 }
1104 
1105 static int is_ebml_id_valid(uint32_t id)
1106 {
1107  // Due to endian nonsense in Matroska, the highest byte with any bits set
1108  // will contain the leading length bit. This bit in turn identifies the
1109  // total byte length of the element by its position within the byte.
1110  unsigned int bits = av_log2(id);
1111  return id && (bits + 7) / 8 == (8 - bits % 8);
1112 }
1113 
1114 /*
1115  * Allocate and return the entry for the level1 element with the given ID. If
1116  * an entry already exists, return the existing entry.
1117  */
1119  uint32_t id)
1120 {
1121  int i;
1122  MatroskaLevel1Element *elem;
1123 
1124  if (!is_ebml_id_valid(id))
1125  return NULL;
1126 
1127  // Some files link to all clusters; useless.
1128  if (id == MATROSKA_ID_CLUSTER)
1129  return NULL;
1130 
1131  // There can be multiple seekheads.
1132  if (id != MATROSKA_ID_SEEKHEAD) {
1133  for (i = 0; i < matroska->num_level1_elems; i++) {
1134  if (matroska->level1_elems[i].id == id)
1135  return &matroska->level1_elems[i];
1136  }
1137  }
1138 
1139  // Only a completely broken file would have more elements.
1140  // It also provides a low-effort way to escape from circular seekheads
1141  // (every iteration will add a level1 entry).
1142  if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1143  av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1144  return NULL;
1145  }
1146 
1147  elem = &matroska->level1_elems[matroska->num_level1_elems++];
1148  *elem = (MatroskaLevel1Element){.id = id};
1149 
1150  return elem;
1151 }
1152 
1154  EbmlSyntax *syntax, void *data)
1155 {
1156  static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1157  [EBML_UINT] = 8,
1158  [EBML_FLOAT] = 8,
1159  // max. 16 MB for strings
1160  [EBML_STR] = 0x1000000,
1161  [EBML_UTF8] = 0x1000000,
1162  // max. 256 MB for binary data
1163  [EBML_BIN] = 0x10000000,
1164  // no limits for anything else
1165  };
1166  AVIOContext *pb = matroska->ctx->pb;
1167  uint32_t id = syntax->id;
1168  uint64_t length;
1169  int res;
1170  void *newelem;
1171  MatroskaLevel1Element *level1_elem;
1172 
1173  data = (char *) data + syntax->data_offset;
1174  if (syntax->list_elem_size) {
1175  EbmlList *list = data;
1176  newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1177  if (!newelem)
1178  return AVERROR(ENOMEM);
1179  list->elem = newelem;
1180  data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1181  memset(data, 0, syntax->list_elem_size);
1182  list->nb_elem++;
1183  }
1184 
1185  if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1186  matroska->current_id = 0;
1187  if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1188  return res;
1189  if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1190  av_log(matroska->ctx, AV_LOG_ERROR,
1191  "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1192  length, max_lengths[syntax->type], syntax->type);
1193  return AVERROR_INVALIDDATA;
1194  }
1195  }
1196 
1197  switch (syntax->type) {
1198  case EBML_UINT:
1199  res = ebml_read_uint(pb, length, data);
1200  break;
1201  case EBML_SINT:
1202  res = ebml_read_sint(pb, length, data);
1203  break;
1204  case EBML_FLOAT:
1205  res = ebml_read_float(pb, length, data);
1206  break;
1207  case EBML_STR:
1208  case EBML_UTF8:
1209  res = ebml_read_ascii(pb, length, data);
1210  break;
1211  case EBML_BIN:
1212  res = ebml_read_binary(pb, length, data);
1213  break;
1214  case EBML_LEVEL1:
1215  case EBML_NEST:
1216  if ((res = ebml_read_master(matroska, length)) < 0)
1217  return res;
1218  if (id == MATROSKA_ID_SEGMENT)
1219  matroska->segment_start = avio_tell(matroska->ctx->pb);
1220  if (id == MATROSKA_ID_CUES)
1221  matroska->cues_parsing_deferred = 0;
1222  if (syntax->type == EBML_LEVEL1 &&
1223  (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1224  if (level1_elem->parsed)
1225  av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1226  level1_elem->parsed = 1;
1227  }
1228  return ebml_parse_nest(matroska, syntax->def.n, data);
1229  case EBML_PASS:
1230  return ebml_parse_id(matroska, syntax->def.n, id, data);
1231  case EBML_STOP:
1232  return 1;
1233  default:
1234  if (ffio_limit(pb, length) != length)
1235  return AVERROR(EIO);
1236  return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1237  }
1238  if (res == AVERROR_INVALIDDATA)
1239  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1240  else if (res == AVERROR(EIO))
1241  av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1242  return res;
1243 }
1244 
1245 static void ebml_free(EbmlSyntax *syntax, void *data)
1246 {
1247  int i, j;
1248  for (i = 0; syntax[i].id; i++) {
1249  void *data_off = (char *) data + syntax[i].data_offset;
1250  switch (syntax[i].type) {
1251  case EBML_STR:
1252  case EBML_UTF8:
1253  av_freep(data_off);
1254  break;
1255  case EBML_BIN:
1256  av_freep(&((EbmlBin *) data_off)->data);
1257  break;
1258  case EBML_LEVEL1:
1259  case EBML_NEST:
1260  if (syntax[i].list_elem_size) {
1261  EbmlList *list = data_off;
1262  char *ptr = list->elem;
1263  for (j = 0; j < list->nb_elem;
1264  j++, ptr += syntax[i].list_elem_size)
1265  ebml_free(syntax[i].def.n, ptr);
1266  av_freep(&list->elem);
1267  list->nb_elem = 0;
1268  } else
1269  ebml_free(syntax[i].def.n, data_off);
1270  default:
1271  break;
1272  }
1273  }
1274 }
1275 
1276 /*
1277  * Autodetecting...
1278  */
1280 {
1281  uint64_t total = 0;
1282  int len_mask = 0x80, size = 1, n = 1, i;
1283 
1284  /* EBML header? */
1285  if (AV_RB32(p->buf) != EBML_ID_HEADER)
1286  return 0;
1287 
1288  /* length of header */
1289  total = p->buf[4];
1290  while (size <= 8 && !(total & len_mask)) {
1291  size++;
1292  len_mask >>= 1;
1293  }
1294  if (size > 8)
1295  return 0;
1296  total &= (len_mask - 1);
1297  while (n < size)
1298  total = (total << 8) | p->buf[4 + n++];
1299 
1300  /* Does the probe data contain the whole header? */
1301  if (p->buf_size < 4 + size + total)
1302  return 0;
1303 
1304  /* The header should contain a known document type. For now,
1305  * we don't parse the whole header but simply check for the
1306  * availability of that array of characters inside the header.
1307  * Not fully fool-proof, but good enough. */
1308  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1309  size_t probelen = strlen(matroska_doctypes[i]);
1310  if (total < probelen)
1311  continue;
1312  for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1313  if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1314  return AVPROBE_SCORE_MAX;
1315  }
1316 
1317  // probably valid EBML header but no recognized doctype
1318  return AVPROBE_SCORE_EXTENSION;
1319 }
1320 
1322  int num)
1323 {
1324  MatroskaTrack *tracks = matroska->tracks.elem;
1325  int i;
1326 
1327  for (i = 0; i < matroska->tracks.nb_elem; i++)
1328  if (tracks[i].num == num)
1329  return &tracks[i];
1330 
1331  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1332  return NULL;
1333 }
1334 
1335 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1336  MatroskaTrack *track)
1337 {
1338  MatroskaTrackEncoding *encodings = track->encodings.elem;
1339  uint8_t *data = *buf;
1340  int isize = *buf_size;
1341  uint8_t *pkt_data = NULL;
1342  uint8_t av_unused *newpktdata;
1343  int pkt_size = isize;
1344  int result = 0;
1345  int olen;
1346 
1347  if (pkt_size >= 10000000U)
1348  return AVERROR_INVALIDDATA;
1349 
1350  switch (encodings[0].compression.algo) {
1352  {
1353  int header_size = encodings[0].compression.settings.size;
1354  uint8_t *header = encodings[0].compression.settings.data;
1355 
1356  if (header_size && !header) {
1357  av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1358  return -1;
1359  }
1360 
1361  if (!header_size)
1362  return 0;
1363 
1364  pkt_size = isize + header_size;
1365  pkt_data = av_malloc(pkt_size);
1366  if (!pkt_data)
1367  return AVERROR(ENOMEM);
1368 
1369  memcpy(pkt_data, header, header_size);
1370  memcpy(pkt_data + header_size, data, isize);
1371  break;
1372  }
1373 #if CONFIG_LZO
1375  do {
1376  olen = pkt_size *= 3;
1377  newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1378  if (!newpktdata) {
1379  result = AVERROR(ENOMEM);
1380  goto failed;
1381  }
1382  pkt_data = newpktdata;
1383  result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1384  } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1385  if (result) {
1386  result = AVERROR_INVALIDDATA;
1387  goto failed;
1388  }
1389  pkt_size -= olen;
1390  break;
1391 #endif
1392 #if CONFIG_ZLIB
1394  {
1395  z_stream zstream = { 0 };
1396  if (inflateInit(&zstream) != Z_OK)
1397  return -1;
1398  zstream.next_in = data;
1399  zstream.avail_in = isize;
1400  do {
1401  pkt_size *= 3;
1402  newpktdata = av_realloc(pkt_data, pkt_size);
1403  if (!newpktdata) {
1404  inflateEnd(&zstream);
1405  result = AVERROR(ENOMEM);
1406  goto failed;
1407  }
1408  pkt_data = newpktdata;
1409  zstream.avail_out = pkt_size - zstream.total_out;
1410  zstream.next_out = pkt_data + zstream.total_out;
1411  result = inflate(&zstream, Z_NO_FLUSH);
1412  } while (result == Z_OK && pkt_size < 10000000);
1413  pkt_size = zstream.total_out;
1414  inflateEnd(&zstream);
1415  if (result != Z_STREAM_END) {
1416  if (result == Z_MEM_ERROR)
1417  result = AVERROR(ENOMEM);
1418  else
1419  result = AVERROR_INVALIDDATA;
1420  goto failed;
1421  }
1422  break;
1423  }
1424 #endif
1425 #if CONFIG_BZLIB
1427  {
1428  bz_stream bzstream = { 0 };
1429  if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1430  return -1;
1431  bzstream.next_in = data;
1432  bzstream.avail_in = isize;
1433  do {
1434  pkt_size *= 3;
1435  newpktdata = av_realloc(pkt_data, pkt_size);
1436  if (!newpktdata) {
1437  BZ2_bzDecompressEnd(&bzstream);
1438  result = AVERROR(ENOMEM);
1439  goto failed;
1440  }
1441  pkt_data = newpktdata;
1442  bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1443  bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1444  result = BZ2_bzDecompress(&bzstream);
1445  } while (result == BZ_OK && pkt_size < 10000000);
1446  pkt_size = bzstream.total_out_lo32;
1447  BZ2_bzDecompressEnd(&bzstream);
1448  if (result != BZ_STREAM_END) {
1449  if (result == BZ_MEM_ERROR)
1450  result = AVERROR(ENOMEM);
1451  else
1452  result = AVERROR_INVALIDDATA;
1453  goto failed;
1454  }
1455  break;
1456  }
1457 #endif
1458  default:
1459  return AVERROR_INVALIDDATA;
1460  }
1461 
1462  *buf = pkt_data;
1463  *buf_size = pkt_size;
1464  return 0;
1465 
1466 failed:
1467  av_free(pkt_data);
1468  return result;
1469 }
1470 
1472  AVDictionary **metadata, char *prefix)
1473 {
1474  MatroskaTag *tags = list->elem;
1475  char key[1024];
1476  int i;
1477 
1478  for (i = 0; i < list->nb_elem; i++) {
1479  const char *lang = tags[i].lang &&
1480  strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1481 
1482  if (!tags[i].name) {
1483  av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1484  continue;
1485  }
1486  if (prefix)
1487  snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1488  else
1489  av_strlcpy(key, tags[i].name, sizeof(key));
1490  if (tags[i].def || !lang) {
1491  av_dict_set(metadata, key, tags[i].string, 0);
1492  if (tags[i].sub.nb_elem)
1493  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1494  }
1495  if (lang) {
1496  av_strlcat(key, "-", sizeof(key));
1497  av_strlcat(key, lang, sizeof(key));
1498  av_dict_set(metadata, key, tags[i].string, 0);
1499  if (tags[i].sub.nb_elem)
1500  matroska_convert_tag(s, &tags[i].sub, metadata, key);
1501  }
1502  }
1504 }
1505 
1507 {
1508  MatroskaDemuxContext *matroska = s->priv_data;
1509  MatroskaTags *tags = matroska->tags.elem;
1510  int i, j;
1511 
1512  for (i = 0; i < matroska->tags.nb_elem; i++) {
1513  if (tags[i].target.attachuid) {
1514  MatroskaAttachment *attachment = matroska->attachments.elem;
1515  int found = 0;
1516  for (j = 0; j < matroska->attachments.nb_elem; j++) {
1517  if (attachment[j].uid == tags[i].target.attachuid &&
1518  attachment[j].stream) {
1519  matroska_convert_tag(s, &tags[i].tag,
1520  &attachment[j].stream->metadata, NULL);
1521  found = 1;
1522  }
1523  }
1524  if (!found) {
1526  "The tags at index %d refer to a "
1527  "non-existent attachment %"PRId64".\n",
1528  i, tags[i].target.attachuid);
1529  }
1530  } else if (tags[i].target.chapteruid) {
1531  MatroskaChapter *chapter = matroska->chapters.elem;
1532  int found = 0;
1533  for (j = 0; j < matroska->chapters.nb_elem; j++) {
1534  if (chapter[j].uid == tags[i].target.chapteruid &&
1535  chapter[j].chapter) {
1536  matroska_convert_tag(s, &tags[i].tag,
1537  &chapter[j].chapter->metadata, NULL);
1538  found = 1;
1539  }
1540  }
1541  if (!found) {
1543  "The tags at index %d refer to a non-existent chapter "
1544  "%"PRId64".\n",
1545  i, tags[i].target.chapteruid);
1546  }
1547  } else if (tags[i].target.trackuid) {
1548  MatroskaTrack *track = matroska->tracks.elem;
1549  int found = 0;
1550  for (j = 0; j < matroska->tracks.nb_elem; j++) {
1551  if (track[j].uid == tags[i].target.trackuid &&
1552  track[j].stream) {
1553  matroska_convert_tag(s, &tags[i].tag,
1554  &track[j].stream->metadata, NULL);
1555  found = 1;
1556  }
1557  }
1558  if (!found) {
1560  "The tags at index %d refer to a non-existent track "
1561  "%"PRId64".\n",
1562  i, tags[i].target.trackuid);
1563  }
1564  } else {
1565  matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1566  tags[i].target.type);
1567  }
1568  }
1569 }
1570 
1572  uint64_t pos)
1573 {
1574  uint32_t level_up = matroska->level_up;
1575  uint32_t saved_id = matroska->current_id;
1576  int64_t before_pos = avio_tell(matroska->ctx->pb);
1578  int64_t offset;
1579  int ret = 0;
1580 
1581  /* seek */
1582  offset = pos + matroska->segment_start;
1583  if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1584  /* We don't want to lose our seekhead level, so we add
1585  * a dummy. This is a crude hack. */
1586  if (matroska->num_levels == EBML_MAX_DEPTH) {
1587  av_log(matroska->ctx, AV_LOG_INFO,
1588  "Max EBML element depth (%d) reached, "
1589  "cannot parse further.\n", EBML_MAX_DEPTH);
1590  ret = AVERROR_INVALIDDATA;
1591  } else {
1592  level.start = 0;
1593  level.length = (uint64_t) -1;
1594  matroska->levels[matroska->num_levels] = level;
1595  matroska->num_levels++;
1596  matroska->current_id = 0;
1597 
1598  ret = ebml_parse(matroska, matroska_segment, matroska);
1599 
1600  /* remove dummy level */
1601  while (matroska->num_levels) {
1602  uint64_t length = matroska->levels[--matroska->num_levels].length;
1603  if (length == (uint64_t) -1)
1604  break;
1605  }
1606  }
1607  }
1608  /* seek back */
1609  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1610  matroska->level_up = level_up;
1611  matroska->current_id = saved_id;
1612 
1613  return ret;
1614 }
1615 
1617 {
1618  EbmlList *seekhead_list = &matroska->seekhead;
1619  int i;
1620 
1621  // we should not do any seeking in the streaming case
1622  if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1623  return;
1624 
1625  for (i = 0; i < seekhead_list->nb_elem; i++) {
1626  MatroskaSeekhead *seekheads = seekhead_list->elem;
1627  uint32_t id = seekheads[i].id;
1628  uint64_t pos = seekheads[i].pos;
1629 
1630  MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1631  if (!elem || elem->parsed)
1632  continue;
1633 
1634  elem->pos = pos;
1635 
1636  // defer cues parsing until we actually need cue data.
1637  if (id == MATROSKA_ID_CUES)
1638  continue;
1639 
1640  if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1641  // mark index as broken
1642  matroska->cues_parsing_deferred = -1;
1643  break;
1644  }
1645 
1646  elem->parsed = 1;
1647  }
1648 }
1649 
1651 {
1652  EbmlList *index_list;
1654  uint64_t index_scale = 1;
1655  int i, j;
1656 
1657  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1658  return;
1659 
1660  index_list = &matroska->index;
1661  index = index_list->elem;
1662  if (index_list->nb_elem < 2)
1663  return;
1664  if (index[1].time > 1E14 / matroska->time_scale) {
1665  av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1666  return;
1667  }
1668  for (i = 0; i < index_list->nb_elem; i++) {
1669  EbmlList *pos_list = &index[i].pos;
1670  MatroskaIndexPos *pos = pos_list->elem;
1671  for (j = 0; j < pos_list->nb_elem; j++) {
1672  MatroskaTrack *track = matroska_find_track_by_num(matroska,
1673  pos[j].track);
1674  if (track && track->stream)
1675  av_add_index_entry(track->stream,
1676  pos[j].pos + matroska->segment_start,
1677  index[i].time / index_scale, 0, 0,
1679  }
1680  }
1681 }
1682 
1684  int i;
1685 
1686  if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1687  return;
1688 
1689  for (i = 0; i < matroska->num_level1_elems; i++) {
1690  MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1691  if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1692  if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1693  matroska->cues_parsing_deferred = -1;
1694  elem->parsed = 1;
1695  break;
1696  }
1697  }
1698 
1699  matroska_add_index_entries(matroska);
1700 }
1701 
1703 {
1704  static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1705  int profile;
1706 
1707  for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1708  if (strstr(codec_id, aac_profiles[profile]))
1709  break;
1710  return profile + 1;
1711 }
1712 
1713 static int matroska_aac_sri(int samplerate)
1714 {
1715  int sri;
1716 
1717  for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1718  if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1719  break;
1720  return sri;
1721 }
1722 
1723 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1724 {
1725  /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1726  avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1727 }
1728 
1730  MatroskaTrack *track,
1731  int *offset)
1732 {
1733  AVStream *st = track->stream;
1734  uint8_t *p = track->codec_priv.data;
1735  int size = track->codec_priv.size;
1736 
1737  if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1738  av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1739  track->codec_priv.size = 0;
1740  return 0;
1741  }
1742  *offset = 8;
1743  track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1744 
1745  p += track->codec_priv.size;
1746  size -= track->codec_priv.size;
1747 
1748  /* parse the remaining metadata blocks if present */
1749  while (size >= 4) {
1750  int block_last, block_type, block_size;
1751 
1752  flac_parse_block_header(p, &block_last, &block_type, &block_size);
1753 
1754  p += 4;
1755  size -= 4;
1756  if (block_size > size)
1757  return 0;
1758 
1759  /* check for the channel mask */
1760  if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1761  AVDictionary *dict = NULL;
1762  AVDictionaryEntry *chmask;
1763 
1764  ff_vorbis_comment(s, &dict, p, block_size, 0);
1765  chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1766  if (chmask) {
1767  uint64_t mask = strtol(chmask->value, NULL, 0);
1768  if (!mask || mask & ~0x3ffffULL) {
1770  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1771  } else
1772  st->codecpar->channel_layout = mask;
1773  }
1774  av_dict_free(&dict);
1775  }
1776 
1777  p += block_size;
1778  size -= block_size;
1779  }
1780 
1781  return 0;
1782 }
1783 
1784 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1785 {
1786  int major, minor, micro, bttb = 0;
1787 
1788  /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1789  * this function, and fixed in 57.52 */
1790  if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
1791  bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1792 
1793  switch (field_order) {
1795  return AV_FIELD_PROGRESSIVE;
1797  return AV_FIELD_UNKNOWN;
1799  return AV_FIELD_TT;
1801  return AV_FIELD_BB;
1803  return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1805  return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1806  default:
1807  return AV_FIELD_UNKNOWN;
1808  }
1809 }
1810 
1811 static void mkv_stereo_mode_display_mul(int stereo_mode,
1812  int *h_width, int *h_height)
1813 {
1814  switch (stereo_mode) {
1820  break;
1825  *h_width = 2;
1826  break;
1831  *h_height = 2;
1832  break;
1833  }
1834 }
1835 
1836 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1837  const MatroskaTrackVideoColor *color = track->video.color.elem;
1838  const MatroskaMasteringMeta *mastering_meta;
1839  int has_mastering_primaries, has_mastering_luminance;
1840 
1841  if (!track->video.color.nb_elem)
1842  return 0;
1843 
1844  mastering_meta = &color->mastering_meta;
1845  // Mastering primaries are CIE 1931 coords, and must be > 0.
1846  has_mastering_primaries =
1847  mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1848  mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1849  mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1850  mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1851  has_mastering_luminance = mastering_meta->max_luminance > 0;
1852 
1855  if (color->primaries != AVCOL_PRI_RESERVED &&
1856  color->primaries != AVCOL_PRI_RESERVED0)
1857  st->codecpar->color_primaries = color->primaries;
1861  if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1862  color->range <= AVCOL_RANGE_JPEG)
1863  st->codecpar->color_range = color->range;
1868  st->codecpar->chroma_location =
1870  (color->chroma_siting_vert - 1) << 7);
1871  }
1872  if (color->max_cll && color->max_fall) {
1873  size_t size = 0;
1874  int ret;
1876  if (!metadata)
1877  return AVERROR(ENOMEM);
1879  (uint8_t *)metadata, size);
1880  if (ret < 0) {
1881  av_freep(&metadata);
1882  return ret;
1883  }
1884  metadata->MaxCLL = color->max_cll;
1885  metadata->MaxFALL = color->max_fall;
1886  }
1887 
1888  if (has_mastering_primaries || has_mastering_luminance) {
1889  // Use similar rationals as other standards.
1890  const int chroma_den = 50000;
1891  const int luma_den = 10000;
1892  AVMasteringDisplayMetadata *metadata =
1895  sizeof(AVMasteringDisplayMetadata));
1896  if (!metadata) {
1897  return AVERROR(ENOMEM);
1898  }
1899  memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1900  if (has_mastering_primaries) {
1901  metadata->display_primaries[0][0] = av_make_q(
1902  round(mastering_meta->r_x * chroma_den), chroma_den);
1903  metadata->display_primaries[0][1] = av_make_q(
1904  round(mastering_meta->r_y * chroma_den), chroma_den);
1905  metadata->display_primaries[1][0] = av_make_q(
1906  round(mastering_meta->g_x * chroma_den), chroma_den);
1907  metadata->display_primaries[1][1] = av_make_q(
1908  round(mastering_meta->g_y * chroma_den), chroma_den);
1909  metadata->display_primaries[2][0] = av_make_q(
1910  round(mastering_meta->b_x * chroma_den), chroma_den);
1911  metadata->display_primaries[2][1] = av_make_q(
1912  round(mastering_meta->b_y * chroma_den), chroma_den);
1913  metadata->white_point[0] = av_make_q(
1914  round(mastering_meta->white_x * chroma_den), chroma_den);
1915  metadata->white_point[1] = av_make_q(
1916  round(mastering_meta->white_y * chroma_den), chroma_den);
1917  metadata->has_primaries = 1;
1918  }
1919  if (has_mastering_luminance) {
1920  metadata->max_luminance = av_make_q(
1921  round(mastering_meta->max_luminance * luma_den), luma_den);
1922  metadata->min_luminance = av_make_q(
1923  round(mastering_meta->min_luminance * luma_den), luma_den);
1924  metadata->has_luminance = 1;
1925  }
1926  }
1927  return 0;
1928 }
1929 
1930 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1931  AVSphericalMapping *spherical;
1932  enum AVSphericalProjection projection;
1933  size_t spherical_size;
1934  uint32_t l = 0, t = 0, r = 0, b = 0;
1935  uint32_t padding = 0;
1936  int ret;
1937  GetByteContext gb;
1938 
1940  track->video.projection.private.size);
1941 
1942  if (bytestream2_get_byte(&gb) != 0) {
1943  av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1944  return 0;
1945  }
1946 
1947  bytestream2_skip(&gb, 3); // flags
1948 
1949  switch (track->video.projection.type) {
1951  if (track->video.projection.private.size == 20) {
1952  t = bytestream2_get_be32(&gb);
1953  b = bytestream2_get_be32(&gb);
1954  l = bytestream2_get_be32(&gb);
1955  r = bytestream2_get_be32(&gb);
1956 
1957  if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1959  "Invalid bounding rectangle coordinates "
1960  "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1961  l, t, r, b);
1962  return AVERROR_INVALIDDATA;
1963  }
1964  } else if (track->video.projection.private.size != 0) {
1965  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1966  return AVERROR_INVALIDDATA;
1967  }
1968 
1969  if (l || t || r || b)
1970  projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1971  else
1972  projection = AV_SPHERICAL_EQUIRECTANGULAR;
1973  break;
1975  if (track->video.projection.private.size < 4) {
1976  av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1977  return AVERROR_INVALIDDATA;
1978  } else if (track->video.projection.private.size == 12) {
1979  uint32_t layout = bytestream2_get_be32(&gb);
1980  if (layout) {
1982  "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1983  return 0;
1984  }
1985  projection = AV_SPHERICAL_CUBEMAP;
1986  padding = bytestream2_get_be32(&gb);
1987  } else {
1988  av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1989  return AVERROR_INVALIDDATA;
1990  }
1991  break;
1993  /* No Spherical metadata */
1994  return 0;
1995  default:
1997  "Unknown spherical metadata type %"PRIu64"\n",
1998  track->video.projection.type);
1999  return 0;
2000  }
2001 
2002  spherical = av_spherical_alloc(&spherical_size);
2003  if (!spherical)
2004  return AVERROR(ENOMEM);
2005 
2006  spherical->projection = projection;
2007 
2008  spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2009  spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2010  spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2011 
2012  spherical->padding = padding;
2013 
2014  spherical->bound_left = l;
2015  spherical->bound_top = t;
2016  spherical->bound_right = r;
2017  spherical->bound_bottom = b;
2018 
2019  ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2020  spherical_size);
2021  if (ret < 0) {
2022  av_freep(&spherical);
2023  return ret;
2024  }
2025 
2026  return 0;
2027 }
2028 
2029 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2030 {
2031  const AVCodecTag *codec_tags;
2032 
2033  codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2035 
2036  /* Normalize noncompliant private data that starts with the fourcc
2037  * by expanding/shifting the data by 4 bytes and storing the data
2038  * size at the start. */
2039  if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2040  uint8_t *p = av_realloc(track->codec_priv.data,
2041  track->codec_priv.size + 4);
2042  if (!p)
2043  return AVERROR(ENOMEM);
2044  memmove(p + 4, p, track->codec_priv.size);
2045  track->codec_priv.data = p;
2046  track->codec_priv.size += 4;
2047  AV_WB32(track->codec_priv.data, track->codec_priv.size);
2048  }
2049 
2050  *fourcc = AV_RL32(track->codec_priv.data + 4);
2051  *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2052 
2053  return 0;
2054 }
2055 
2057 {
2058  MatroskaDemuxContext *matroska = s->priv_data;
2059  MatroskaTrack *tracks = matroska->tracks.elem;
2060  AVStream *st;
2061  int i, j, ret;
2062  int k;
2063 
2064  for (i = 0; i < matroska->tracks.nb_elem; i++) {
2065  MatroskaTrack *track = &tracks[i];
2067  EbmlList *encodings_list = &track->encodings;
2068  MatroskaTrackEncoding *encodings = encodings_list->elem;
2069  uint8_t *extradata = NULL;
2070  int extradata_size = 0;
2071  int extradata_offset = 0;
2072  uint32_t fourcc = 0;
2073  AVIOContext b;
2074  char* key_id_base64 = NULL;
2075  int bit_depth = -1;
2076 
2077  /* Apply some sanity checks. */
2078  if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2079  track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2080  track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2081  track->type != MATROSKA_TRACK_TYPE_METADATA) {
2082  av_log(matroska->ctx, AV_LOG_INFO,
2083  "Unknown or unsupported track type %"PRIu64"\n",
2084  track->type);
2085  continue;
2086  }
2087  if (!track->codec_id)
2088  continue;
2089 
2090  if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2091  isnan(track->audio.samplerate)) {
2092  av_log(matroska->ctx, AV_LOG_WARNING,
2093  "Invalid sample rate %f, defaulting to 8000 instead.\n",
2094  track->audio.samplerate);
2095  track->audio.samplerate = 8000;
2096  }
2097 
2098  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2099  if (!track->default_duration && track->video.frame_rate > 0)
2100  track->default_duration = 1000000000 / track->video.frame_rate;
2101  if (track->video.display_width == -1)
2102  track->video.display_width = track->video.pixel_width;
2103  if (track->video.display_height == -1)
2104  track->video.display_height = track->video.pixel_height;
2105  if (track->video.color_space.size == 4)
2106  fourcc = AV_RL32(track->video.color_space.data);
2107  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2108  if (!track->audio.out_samplerate)
2109  track->audio.out_samplerate = track->audio.samplerate;
2110  }
2111  if (encodings_list->nb_elem > 1) {
2112  av_log(matroska->ctx, AV_LOG_ERROR,
2113  "Multiple combined encodings not supported");
2114  } else if (encodings_list->nb_elem == 1) {
2115  if (encodings[0].type) {
2116  if (encodings[0].encryption.key_id.size > 0) {
2117  /* Save the encryption key id to be stored later as a
2118  metadata tag. */
2119  const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2120  key_id_base64 = av_malloc(b64_size);
2121  if (key_id_base64 == NULL)
2122  return AVERROR(ENOMEM);
2123 
2124  av_base64_encode(key_id_base64, b64_size,
2125  encodings[0].encryption.key_id.data,
2126  encodings[0].encryption.key_id.size);
2127  } else {
2128  encodings[0].scope = 0;
2129  av_log(matroska->ctx, AV_LOG_ERROR,
2130  "Unsupported encoding type");
2131  }
2132  } else if (
2133 #if CONFIG_ZLIB
2134  encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2135 #endif
2136 #if CONFIG_BZLIB
2138 #endif
2139 #if CONFIG_LZO
2141 #endif
2143  encodings[0].scope = 0;
2144  av_log(matroska->ctx, AV_LOG_ERROR,
2145  "Unsupported encoding type");
2146  } else if (track->codec_priv.size && encodings[0].scope & 2) {
2147  uint8_t *codec_priv = track->codec_priv.data;
2148  int ret = matroska_decode_buffer(&track->codec_priv.data,
2149  &track->codec_priv.size,
2150  track);
2151  if (ret < 0) {
2152  track->codec_priv.data = NULL;
2153  track->codec_priv.size = 0;
2154  av_log(matroska->ctx, AV_LOG_ERROR,
2155  "Failed to decode codec private data\n");
2156  }
2157 
2158  if (codec_priv != track->codec_priv.data)
2159  av_free(codec_priv);
2160  }
2161  }
2162 
2163  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2164  if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2165  strlen(ff_mkv_codec_tags[j].str))) {
2166  codec_id = ff_mkv_codec_tags[j].id;
2167  break;
2168  }
2169  }
2170 
2171  st = track->stream = avformat_new_stream(s, NULL);
2172  if (!st) {
2173  av_free(key_id_base64);
2174  return AVERROR(ENOMEM);
2175  }
2176 
2177  if (key_id_base64) {
2178  /* export encryption key id as base64 metadata tag */
2179  av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2180  av_freep(&key_id_base64);
2181  }
2182 
2183  if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2184  track->codec_priv.size >= 40 &&
2185  track->codec_priv.data) {
2186  track->ms_compat = 1;
2187  bit_depth = AV_RL16(track->codec_priv.data + 14);
2188  fourcc = AV_RL32(track->codec_priv.data + 16);
2190  fourcc);
2191  if (!codec_id)
2193  fourcc);
2194  extradata_offset = 40;
2195  } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2196  track->codec_priv.size >= 14 &&
2197  track->codec_priv.data) {
2198  int ret;
2199  ffio_init_context(&b, track->codec_priv.data,
2200  track->codec_priv.size,
2201  0, NULL, NULL, NULL, NULL);
2202  ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2203  if (ret < 0)
2204  return ret;
2205  codec_id = st->codecpar->codec_id;
2206  fourcc = st->codecpar->codec_tag;
2207  extradata_offset = FFMIN(track->codec_priv.size, 18);
2208  } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2209  /* Normally 36, but allow noncompliant private data */
2210  && (track->codec_priv.size >= 32)
2211  && (track->codec_priv.data)) {
2212  uint16_t sample_size;
2213  int ret = get_qt_codec(track, &fourcc, &codec_id);
2214  if (ret < 0)
2215  return ret;
2216  sample_size = AV_RB16(track->codec_priv.data + 26);
2217  if (fourcc == 0) {
2218  if (sample_size == 8) {
2219  fourcc = MKTAG('r','a','w',' ');
2220  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2221  } else if (sample_size == 16) {
2222  fourcc = MKTAG('t','w','o','s');
2223  codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2224  }
2225  }
2226  if ((fourcc == MKTAG('t','w','o','s') ||
2227  fourcc == MKTAG('s','o','w','t')) &&
2228  sample_size == 8)
2229  codec_id = AV_CODEC_ID_PCM_S8;
2230  } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2231  (track->codec_priv.size >= 21) &&
2232  (track->codec_priv.data)) {
2233  int ret = get_qt_codec(track, &fourcc, &codec_id);
2234  if (ret < 0)
2235  return ret;
2236  if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2237  fourcc = MKTAG('S','V','Q','3');
2238  codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2239  }
2240  if (codec_id == AV_CODEC_ID_NONE)
2241  av_log(matroska->ctx, AV_LOG_ERROR,
2242  "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2243  if (track->codec_priv.size >= 86) {
2244  bit_depth = AV_RB16(track->codec_priv.data + 82);
2245  ffio_init_context(&b, track->codec_priv.data,
2246  track->codec_priv.size,
2247  0, NULL, NULL, NULL, NULL);
2248  if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2249  bit_depth &= 0x1F;
2250  track->has_palette = 1;
2251  }
2252  }
2253  } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2254  switch (track->audio.bitdepth) {
2255  case 8:
2256  codec_id = AV_CODEC_ID_PCM_U8;
2257  break;
2258  case 24:
2259  codec_id = AV_CODEC_ID_PCM_S24BE;
2260  break;
2261  case 32:
2262  codec_id = AV_CODEC_ID_PCM_S32BE;
2263  break;
2264  }
2265  } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2266  switch (track->audio.bitdepth) {
2267  case 8:
2268  codec_id = AV_CODEC_ID_PCM_U8;
2269  break;
2270  case 24:
2271  codec_id = AV_CODEC_ID_PCM_S24LE;
2272  break;
2273  case 32:
2274  codec_id = AV_CODEC_ID_PCM_S32LE;
2275  break;
2276  }
2277  } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2278  track->audio.bitdepth == 64) {
2279  codec_id = AV_CODEC_ID_PCM_F64LE;
2280  } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2281  int profile = matroska_aac_profile(track->codec_id);
2282  int sri = matroska_aac_sri(track->audio.samplerate);
2283  extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2284  if (!extradata)
2285  return AVERROR(ENOMEM);
2286  extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2287  extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2288  if (strstr(track->codec_id, "SBR")) {
2289  sri = matroska_aac_sri(track->audio.out_samplerate);
2290  extradata[2] = 0x56;
2291  extradata[3] = 0xE5;
2292  extradata[4] = 0x80 | (sri << 3);
2293  extradata_size = 5;
2294  } else
2295  extradata_size = 2;
2296  } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2297  /* Only ALAC's magic cookie is stored in Matroska's track headers.
2298  * Create the "atom size", "tag", and "tag version" fields the
2299  * decoder expects manually. */
2300  extradata_size = 12 + track->codec_priv.size;
2301  extradata = av_mallocz(extradata_size +
2303  if (!extradata)
2304  return AVERROR(ENOMEM);
2305  AV_WB32(extradata, extradata_size);
2306  memcpy(&extradata[4], "alac", 4);
2307  AV_WB32(&extradata[8], 0);
2308  memcpy(&extradata[12], track->codec_priv.data,
2309  track->codec_priv.size);
2310  } else if (codec_id == AV_CODEC_ID_TTA) {
2311  extradata_size = 30;
2312  extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2313  if (!extradata)
2314  return AVERROR(ENOMEM);
2315  ffio_init_context(&b, extradata, extradata_size, 1,
2316  NULL, NULL, NULL, NULL);
2317  avio_write(&b, "TTA1", 4);
2318  avio_wl16(&b, 1);
2319  if (track->audio.channels > UINT16_MAX ||
2320  track->audio.bitdepth > UINT16_MAX) {
2321  av_log(matroska->ctx, AV_LOG_WARNING,
2322  "Too large audio channel number %"PRIu64
2323  " or bitdepth %"PRIu64". Skipping track.\n",
2324  track->audio.channels, track->audio.bitdepth);
2325  av_freep(&extradata);
2326  if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2327  return AVERROR_INVALIDDATA;
2328  else
2329  continue;
2330  }
2331  avio_wl16(&b, track->audio.channels);
2332  avio_wl16(&b, track->audio.bitdepth);
2333  if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2334  return AVERROR_INVALIDDATA;
2335  avio_wl32(&b, track->audio.out_samplerate);
2336  avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2337  track->audio.out_samplerate,
2338  AV_TIME_BASE * 1000));
2339  } else if (codec_id == AV_CODEC_ID_RV10 ||
2340  codec_id == AV_CODEC_ID_RV20 ||
2341  codec_id == AV_CODEC_ID_RV30 ||
2342  codec_id == AV_CODEC_ID_RV40) {
2343  extradata_offset = 26;
2344  } else if (codec_id == AV_CODEC_ID_RA_144) {
2345  track->audio.out_samplerate = 8000;
2346  track->audio.channels = 1;
2347  } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2348  codec_id == AV_CODEC_ID_COOK ||
2349  codec_id == AV_CODEC_ID_ATRAC3 ||
2350  codec_id == AV_CODEC_ID_SIPR)
2351  && track->codec_priv.data) {
2352  int flavor;
2353 
2354  ffio_init_context(&b, track->codec_priv.data,
2355  track->codec_priv.size,
2356  0, NULL, NULL, NULL, NULL);
2357  avio_skip(&b, 22);
2358  flavor = avio_rb16(&b);
2359  track->audio.coded_framesize = avio_rb32(&b);
2360  avio_skip(&b, 12);
2361  track->audio.sub_packet_h = avio_rb16(&b);
2362  track->audio.frame_size = avio_rb16(&b);
2363  track->audio.sub_packet_size = avio_rb16(&b);
2364  if (flavor < 0 ||
2365  track->audio.coded_framesize <= 0 ||
2366  track->audio.sub_packet_h <= 0 ||
2367  track->audio.frame_size <= 0 ||
2368  track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2369  return AVERROR_INVALIDDATA;
2370  track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2371  track->audio.frame_size);
2372  if (!track->audio.buf)
2373  return AVERROR(ENOMEM);
2374  if (codec_id == AV_CODEC_ID_RA_288) {
2375  st->codecpar->block_align = track->audio.coded_framesize;
2376  track->codec_priv.size = 0;
2377  } else {
2378  if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2379  static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2380  track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2381  st->codecpar->bit_rate = sipr_bit_rate[flavor];
2382  }
2383  st->codecpar->block_align = track->audio.sub_packet_size;
2384  extradata_offset = 78;
2385  }
2386  } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2387  ret = matroska_parse_flac(s, track, &extradata_offset);
2388  if (ret < 0)
2389  return ret;
2390  } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2391  fourcc = AV_RL32(track->codec_priv.data);
2392  }
2393  track->codec_priv.size -= extradata_offset;
2394 
2395  if (codec_id == AV_CODEC_ID_NONE)
2396  av_log(matroska->ctx, AV_LOG_INFO,
2397  "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2398 
2399  if (track->time_scale < 0.01)
2400  track->time_scale = 1.0;
2401  avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2402  1000 * 1000 * 1000); /* 64 bit pts in ns */
2403 
2404  /* convert the delay from ns to the track timebase */
2406  (AVRational){ 1, 1000000000 },
2407  st->time_base);
2408 
2409  st->codecpar->codec_id = codec_id;
2410 
2411  if (strcmp(track->language, "und"))
2412  av_dict_set(&st->metadata, "language", track->language, 0);
2413  av_dict_set(&st->metadata, "title", track->name, 0);
2414 
2415  if (track->flag_default)
2417  if (track->flag_forced)
2419 
2420  if (!st->codecpar->extradata) {
2421  if (extradata) {
2422  st->codecpar->extradata = extradata;
2423  st->codecpar->extradata_size = extradata_size;
2424  } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2425  if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2426  return AVERROR(ENOMEM);
2427  memcpy(st->codecpar->extradata,
2428  track->codec_priv.data + extradata_offset,
2429  track->codec_priv.size);
2430  }
2431  }
2432 
2433  if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2434  MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2435  int display_width_mul = 1;
2436  int display_height_mul = 1;
2437 
2439  st->codecpar->codec_tag = fourcc;
2440  if (bit_depth >= 0)
2442  st->codecpar->width = track->video.pixel_width;
2443  st->codecpar->height = track->video.pixel_height;
2444 
2445  if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2446  st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2447  else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2449 
2450  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2451  mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2452 
2453  if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2455  &st->sample_aspect_ratio.den,
2456  st->codecpar->height * track->video.display_width * display_width_mul,
2457  st->codecpar->width * track->video.display_height * display_height_mul,
2458  255);
2459  }
2460  if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2462 
2463  if (track->default_duration) {
2465  1000000000, track->default_duration, 30000);
2466 #if FF_API_R_FRAME_RATE
2467  if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2468  && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2469  st->r_frame_rate = st->avg_frame_rate;
2470 #endif
2471  }
2472 
2473  /* export stereo mode flag as metadata tag */
2474  if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2475  av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2476 
2477  /* export alpha mode flag as metadata tag */
2478  if (track->video.alpha_mode)
2479  av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2480 
2481  /* if we have virtual track, mark the real tracks */
2482  for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2483  char buf[32];
2484  if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2485  continue;
2486  snprintf(buf, sizeof(buf), "%s_%d",
2487  ff_matroska_video_stereo_plane[planes[j].type], i);
2488  for (k=0; k < matroska->tracks.nb_elem; k++)
2489  if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2490  av_dict_set(&tracks[k].stream->metadata,
2491  "stereo_mode", buf, 0);
2492  break;
2493  }
2494  }
2495  // add stream level stereo3d side data if it is a supported format
2496  if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2497  track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2498  int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2499  if (ret < 0)
2500  return ret;
2501  }
2502 
2503  ret = mkv_parse_video_color(st, track);
2504  if (ret < 0)
2505  return ret;
2506  ret = mkv_parse_video_projection(st, track);
2507  if (ret < 0)
2508  return ret;
2509  } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2511  st->codecpar->codec_tag = fourcc;
2512  st->codecpar->sample_rate = track->audio.out_samplerate;
2513  st->codecpar->channels = track->audio.channels;
2514  if (!st->codecpar->bits_per_coded_sample)
2515  st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2516  if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2518  else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2520  if (track->codec_delay > 0) {
2521  st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2522  (AVRational){1, 1000000000},
2524  48000 : st->codecpar->sample_rate});
2525  }
2526  if (track->seek_preroll > 0) {
2527  st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2528  (AVRational){1, 1000000000},
2529  (AVRational){1, st->codecpar->sample_rate});
2530  }
2531  } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2532  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2533 
2534  if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2535  st->disposition |= AV_DISPOSITION_CAPTIONS;
2536  } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2537  st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2538  } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2539  st->disposition |= AV_DISPOSITION_METADATA;
2540  }
2541  } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2542  st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2543  if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2544  matroska->contains_ssa = 1;
2545  }
2546  }
2547 
2548  return 0;
2549 }
2550 
2552 {
2553  MatroskaDemuxContext *matroska = s->priv_data;
2554  EbmlList *attachments_list = &matroska->attachments;
2555  EbmlList *chapters_list = &matroska->chapters;
2556  MatroskaAttachment *attachments;
2557  MatroskaChapter *chapters;
2558  uint64_t max_start = 0;
2559  int64_t pos;
2560  Ebml ebml = { 0 };
2561  int i, j, res;
2562 
2563  matroska->ctx = s;
2564  matroska->cues_parsing_deferred = 1;
2565 
2566  /* First read the EBML header. */
2567  if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2568  av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2569  ebml_free(ebml_syntax, &ebml);
2570  return AVERROR_INVALIDDATA;
2571  }
2572  if (ebml.version > EBML_VERSION ||
2573  ebml.max_size > sizeof(uint64_t) ||
2574  ebml.id_length > sizeof(uint32_t) ||
2575  ebml.doctype_version > 3) {
2577  "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2578  ebml.version, ebml.doctype, ebml.doctype_version);
2579  ebml_free(ebml_syntax, &ebml);
2580  return AVERROR_PATCHWELCOME;
2581  } else if (ebml.doctype_version == 3) {
2582  av_log(matroska->ctx, AV_LOG_WARNING,
2583  "EBML header using unsupported features\n"
2584  "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2585  ebml.version, ebml.doctype, ebml.doctype_version);
2586  }
2587  for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2588  if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2589  break;
2590  if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2591  av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2592  if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2593  ebml_free(ebml_syntax, &ebml);
2594  return AVERROR_INVALIDDATA;
2595  }
2596  }
2597  ebml_free(ebml_syntax, &ebml);
2598 
2599  /* The next thing is a segment. */
2600  pos = avio_tell(matroska->ctx->pb);
2601  res = ebml_parse(matroska, matroska_segments, matroska);
2602  // try resyncing until we find a EBML_STOP type element.
2603  while (res != 1) {
2604  res = matroska_resync(matroska, pos);
2605  if (res < 0)
2606  goto fail;
2607  pos = avio_tell(matroska->ctx->pb);
2608  res = ebml_parse(matroska, matroska_segment, matroska);
2609  }
2610  matroska_execute_seekhead(matroska);
2611 
2612  if (!matroska->time_scale)
2613  matroska->time_scale = 1000000;
2614  if (matroska->duration)
2615  matroska->ctx->duration = matroska->duration * matroska->time_scale *
2616  1000 / AV_TIME_BASE;
2617  av_dict_set(&s->metadata, "title", matroska->title, 0);
2618  av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2619 
2620  if (matroska->date_utc.size == 8)
2622 
2623  res = matroska_parse_tracks(s);
2624  if (res < 0)
2625  goto fail;
2626 
2627  attachments = attachments_list->elem;
2628  for (j = 0; j < attachments_list->nb_elem; j++) {
2629  if (!(attachments[j].filename && attachments[j].mime &&
2630  attachments[j].bin.data && attachments[j].bin.size > 0)) {
2631  av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2632  } else {
2633  AVStream *st = avformat_new_stream(s, NULL);
2634  if (!st)
2635  break;
2636  av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2637  av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2639 
2640  for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2641  if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2642  strlen(ff_mkv_image_mime_tags[i].str))) {
2644  break;
2645  }
2646  }
2647 
2648  attachments[j].stream = st;
2649 
2650  if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2653 
2655  if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2656  return res;
2657  memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2658  st->attached_pic.stream_index = st->index;
2660  } else {
2662  if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2663  break;
2664  memcpy(st->codecpar->extradata, attachments[j].bin.data,
2665  attachments[j].bin.size);
2666 
2667  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2668  if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2669  strlen(ff_mkv_mime_tags[i].str))) {
2671  break;
2672  }
2673  }
2674  }
2675  }
2676  }
2677 
2678  chapters = chapters_list->elem;
2679  for (i = 0; i < chapters_list->nb_elem; i++)
2680  if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2681  (max_start == 0 || chapters[i].start > max_start)) {
2682  chapters[i].chapter =
2683  avpriv_new_chapter(s, chapters[i].uid,
2684  (AVRational) { 1, 1000000000 },
2685  chapters[i].start, chapters[i].end,
2686  chapters[i].title);
2687  if (chapters[i].chapter) {
2688  av_dict_set(&chapters[i].chapter->metadata,
2689  "title", chapters[i].title, 0);
2690  }
2691  max_start = chapters[i].start;
2692  }
2693 
2694  matroska_add_index_entries(matroska);
2695 
2697 
2698  return 0;
2699 fail:
2701  return res;
2702 }
2703 
2704 /*
2705  * Put one packet in an application-supplied AVPacket struct.
2706  * Returns 0 on success or -1 on failure.
2707  */
2709  AVPacket *pkt)
2710 {
2711  if (matroska->num_packets > 0) {
2712  MatroskaTrack *tracks = matroska->tracks.elem;
2713  MatroskaTrack *track;
2714  memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2715  av_freep(&matroska->packets[0]);
2716  track = &tracks[pkt->stream_index];
2717  if (track->has_palette) {
2719  if (!pal) {
2720  av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2721  } else {
2722  memcpy(pal, track->palette, AVPALETTE_SIZE);
2723  }
2724  track->has_palette = 0;
2725  }
2726  if (matroska->num_packets > 1) {
2727  void *newpackets;
2728  memmove(&matroska->packets[0], &matroska->packets[1],
2729  (matroska->num_packets - 1) * sizeof(AVPacket *));
2730  newpackets = av_realloc(matroska->packets,
2731  (matroska->num_packets - 1) *
2732  sizeof(AVPacket *));
2733  if (newpackets)
2734  matroska->packets = newpackets;
2735  } else {
2736  av_freep(&matroska->packets);
2737  matroska->prev_pkt = NULL;
2738  }
2739  matroska->num_packets--;
2740  return 0;
2741  }
2742 
2743  return -1;
2744 }
2745 
2746 /*
2747  * Free all packets in our internal queue.
2748  */
2750 {
2751  matroska->prev_pkt = NULL;
2752  if (matroska->packets) {
2753  int n;
2754  for (n = 0; n < matroska->num_packets; n++) {
2755  av_packet_unref(matroska->packets[n]);
2756  av_freep(&matroska->packets[n]);
2757  }
2758  av_freep(&matroska->packets);
2759  matroska->num_packets = 0;
2760  }
2761 }
2762 
2764  int *buf_size, int type,
2765  uint32_t **lace_buf, int *laces)
2766 {
2767  int res = 0, n, size = *buf_size;
2768  uint8_t *data = *buf;
2769  uint32_t *lace_size;
2770 
2771  if (!type) {
2772  *laces = 1;
2773  *lace_buf = av_mallocz(sizeof(int));
2774  if (!*lace_buf)
2775  return AVERROR(ENOMEM);
2776 
2777  *lace_buf[0] = size;
2778  return 0;
2779  }
2780 
2781  av_assert0(size > 0);
2782  *laces = *data + 1;
2783  data += 1;
2784  size -= 1;
2785  lace_size = av_mallocz(*laces * sizeof(int));
2786  if (!lace_size)
2787  return AVERROR(ENOMEM);
2788 
2789  switch (type) {
2790  case 0x1: /* Xiph lacing */
2791  {
2792  uint8_t temp;
2793  uint32_t total = 0;
2794  for (n = 0; res == 0 && n < *laces - 1; n++) {
2795  while (1) {
2796  if (size <= total) {
2797  res = AVERROR_INVALIDDATA;
2798  break;
2799  }
2800  temp = *data;
2801  total += temp;
2802  lace_size[n] += temp;
2803  data += 1;
2804  size -= 1;
2805  if (temp != 0xff)
2806  break;
2807  }
2808  }
2809  if (size <= total) {
2810  res = AVERROR_INVALIDDATA;
2811  break;
2812  }
2813 
2814  lace_size[n] = size - total;
2815  break;
2816  }
2817 
2818  case 0x2: /* fixed-size lacing */
2819  if (size % (*laces)) {
2820  res = AVERROR_INVALIDDATA;
2821  break;
2822  }
2823  for (n = 0; n < *laces; n++)
2824  lace_size[n] = size / *laces;
2825  break;
2826 
2827  case 0x3: /* EBML lacing */
2828  {
2829  uint64_t num;
2830  uint64_t total;
2831  n = matroska_ebmlnum_uint(matroska, data, size, &num);
2832  if (n < 0 || num > INT_MAX) {
2833  av_log(matroska->ctx, AV_LOG_INFO,
2834  "EBML block data error\n");
2835  res = n<0 ? n : AVERROR_INVALIDDATA;
2836  break;
2837  }
2838  data += n;
2839  size -= n;
2840  total = lace_size[0] = num;
2841  for (n = 1; res == 0 && n < *laces - 1; n++) {
2842  int64_t snum;
2843  int r;
2844  r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2845  if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2846  av_log(matroska->ctx, AV_LOG_INFO,
2847  "EBML block data error\n");
2848  res = r<0 ? r : AVERROR_INVALIDDATA;
2849  break;
2850  }
2851  data += r;
2852  size -= r;
2853  lace_size[n] = lace_size[n - 1] + snum;
2854  total += lace_size[n];
2855  }
2856  if (size <= total) {
2857  res = AVERROR_INVALIDDATA;
2858  break;
2859  }
2860  lace_size[*laces - 1] = size - total;
2861  break;
2862  }
2863  }
2864 
2865  *buf = data;
2866  *lace_buf = lace_size;
2867  *buf_size = size;
2868 
2869  return res;
2870 }
2871 
2873  MatroskaTrack *track, AVStream *st,
2874  uint8_t *data, int size, uint64_t timecode,
2875  int64_t pos)
2876 {
2877  int a = st->codecpar->block_align;
2878  int sps = track->audio.sub_packet_size;
2879  int cfs = track->audio.coded_framesize;
2880  int h = track->audio.sub_packet_h;
2881  int y = track->audio.sub_packet_cnt;
2882  int w = track->audio.frame_size;
2883  int x;
2884 
2885  if (!track->audio.pkt_cnt) {
2886  if (track->audio.sub_packet_cnt == 0)
2887  track->audio.buf_timecode = timecode;
2888  if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2889  if (size < cfs * h / 2) {
2890  av_log(matroska->ctx, AV_LOG_ERROR,
2891  "Corrupt int4 RM-style audio packet size\n");
2892  return AVERROR_INVALIDDATA;
2893  }
2894  for (x = 0; x < h / 2; x++)
2895  memcpy(track->audio.buf + x * 2 * w + y * cfs,
2896  data + x * cfs, cfs);
2897  } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2898  if (size < w) {
2899  av_log(matroska->ctx, AV_LOG_ERROR,
2900  "Corrupt sipr RM-style audio packet size\n");
2901  return AVERROR_INVALIDDATA;
2902  }
2903  memcpy(track->audio.buf + y * w, data, w);
2904  } else {
2905  if (size < sps * w / sps || h<=0 || w%sps) {
2906  av_log(matroska->ctx, AV_LOG_ERROR,
2907  "Corrupt generic RM-style audio packet size\n");
2908  return AVERROR_INVALIDDATA;
2909  }
2910  for (x = 0; x < w / sps; x++)
2911  memcpy(track->audio.buf +
2912  sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2913  data + x * sps, sps);
2914  }
2915 
2916  if (++track->audio.sub_packet_cnt >= h) {
2917  if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2918  ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2919  track->audio.sub_packet_cnt = 0;
2920  track->audio.pkt_cnt = h * w / a;
2921  }
2922  }
2923 
2924  while (track->audio.pkt_cnt) {
2925  int ret;
2926  AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2927  if (!pkt)
2928  return AVERROR(ENOMEM);
2929 
2930  ret = av_new_packet(pkt, a);
2931  if (ret < 0) {
2932  av_free(pkt);
2933  return ret;
2934  }
2935  memcpy(pkt->data,
2936  track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2937  a);
2938  pkt->pts = track->audio.buf_timecode;
2940  pkt->pos = pos;
2941  pkt->stream_index = st->index;
2942  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2943  }
2944 
2945  return 0;
2946 }
2947 
2948 /* reconstruct full wavpack blocks from mangled matroska ones */
2950  uint8_t **pdst, int *size)
2951 {
2952  uint8_t *dst = NULL;
2953  int dstlen = 0;
2954  int srclen = *size;
2955  uint32_t samples;
2956  uint16_t ver;
2957  int ret, offset = 0;
2958 
2959  if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2960  return AVERROR_INVALIDDATA;
2961 
2962  ver = AV_RL16(track->stream->codecpar->extradata);
2963 
2964  samples = AV_RL32(src);
2965  src += 4;
2966  srclen -= 4;
2967 
2968  while (srclen >= 8) {
2969  int multiblock;
2970  uint32_t blocksize;
2971  uint8_t *tmp;
2972 
2973  uint32_t flags = AV_RL32(src);
2974  uint32_t crc = AV_RL32(src + 4);
2975  src += 8;
2976  srclen -= 8;
2977 
2978  multiblock = (flags & 0x1800) != 0x1800;
2979  if (multiblock) {
2980  if (srclen < 4) {
2981  ret = AVERROR_INVALIDDATA;
2982  goto fail;
2983  }
2984  blocksize = AV_RL32(src);
2985  src += 4;
2986  srclen -= 4;
2987  } else
2988  blocksize = srclen;
2989 
2990  if (blocksize > srclen) {
2991  ret = AVERROR_INVALIDDATA;
2992  goto fail;
2993  }
2994 
2995  tmp = av_realloc(dst, dstlen + blocksize + 32);
2996  if (!tmp) {
2997  ret = AVERROR(ENOMEM);
2998  goto fail;
2999  }
3000  dst = tmp;
3001  dstlen += blocksize + 32;
3002 
3003  AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3004  AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3005  AV_WL16(dst + offset + 8, ver); // version
3006  AV_WL16(dst + offset + 10, 0); // track/index_no
3007  AV_WL32(dst + offset + 12, 0); // total samples
3008  AV_WL32(dst + offset + 16, 0); // block index
3009  AV_WL32(dst + offset + 20, samples); // number of samples
3010  AV_WL32(dst + offset + 24, flags); // flags
3011  AV_WL32(dst + offset + 28, crc); // crc
3012  memcpy(dst + offset + 32, src, blocksize); // block data
3013 
3014  src += blocksize;
3015  srclen -= blocksize;
3016  offset += blocksize + 32;
3017  }
3018 
3019  *pdst = dst;
3020  *size = dstlen;
3021 
3022  return 0;
3023 
3024 fail:
3025  av_freep(&dst);
3026  return ret;
3027 }
3028 
3030  MatroskaTrack *track,
3031  AVStream *st,
3032  uint8_t *data, int data_len,
3033  uint64_t timecode,
3034  uint64_t duration,
3035  int64_t pos)
3036 {
3037  AVPacket *pkt;
3038  uint8_t *id, *settings, *text, *buf;
3039  int id_len, settings_len, text_len;
3040  uint8_t *p, *q;
3041  int err;
3042 
3043  if (data_len <= 0)
3044  return AVERROR_INVALIDDATA;
3045 
3046  p = data;
3047  q = data + data_len;
3048 
3049  id = p;
3050  id_len = -1;
3051  while (p < q) {
3052  if (*p == '\r' || *p == '\n') {
3053  id_len = p - id;
3054  if (*p == '\r')
3055  p++;
3056  break;
3057  }
3058  p++;
3059  }
3060 
3061  if (p >= q || *p != '\n')
3062  return AVERROR_INVALIDDATA;
3063  p++;
3064 
3065  settings = p;
3066  settings_len = -1;
3067  while (p < q) {
3068  if (*p == '\r' || *p == '\n') {
3069  settings_len = p - settings;
3070  if (*p == '\r')
3071  p++;
3072  break;
3073  }
3074  p++;
3075  }
3076 
3077  if (p >= q || *p != '\n')
3078  return AVERROR_INVALIDDATA;
3079  p++;
3080 
3081  text = p;
3082  text_len = q - p;
3083  while (text_len > 0) {
3084  const int len = text_len - 1;
3085  const uint8_t c = p[len];
3086  if (c != '\r' && c != '\n')
3087  break;
3088  text_len = len;
3089  }
3090 
3091  if (text_len <= 0)
3092  return AVERROR_INVALIDDATA;
3093 
3094  pkt = av_mallocz(sizeof(*pkt));
3095  if (!pkt)
3096  return AVERROR(ENOMEM);
3097  err = av_new_packet(pkt, text_len);
3098  if (err < 0) {
3099  av_free(pkt);
3100  return AVERROR(err);
3101  }
3102 
3103  memcpy(pkt->data, text, text_len);
3104 
3105  if (id_len > 0) {
3106  buf = av_packet_new_side_data(pkt,
3108  id_len);
3109  if (!buf) {
3110  av_free(pkt);
3111  return AVERROR(ENOMEM);
3112  }
3113  memcpy(buf, id, id_len);
3114  }
3115 
3116  if (settings_len > 0) {
3117  buf = av_packet_new_side_data(pkt,
3119  settings_len);
3120  if (!buf) {
3121  av_free(pkt);
3122  return AVERROR(ENOMEM);
3123  }
3124  memcpy(buf, settings, settings_len);
3125  }
3126 
3127  // Do we need this for subtitles?
3128  // pkt->flags = AV_PKT_FLAG_KEY;
3129 
3130  pkt->stream_index = st->index;
3131  pkt->pts = timecode;
3132 
3133  // Do we need this for subtitles?
3134  // pkt->dts = timecode;
3135 
3136  pkt->duration = duration;
3137  pkt->pos = pos;
3138 
3139  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3140  matroska->prev_pkt = pkt;
3141 
3142  return 0;
3143 }
3144 
3146  MatroskaTrack *track, AVStream *st,
3147  uint8_t *data, int pkt_size,
3148  uint64_t timecode, uint64_t lace_duration,
3149  int64_t pos, int is_keyframe,
3150  uint8_t *additional, uint64_t additional_id, int additional_size,
3151  int64_t discard_padding)
3152 {
3153  MatroskaTrackEncoding *encodings = track->encodings.elem;
3154  uint8_t *pkt_data = data;
3155  int offset = 0, res;
3156  AVPacket *pkt;
3157 
3158  if (encodings && !encodings->type && encodings->scope & 1) {
3159  res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3160  if (res < 0)
3161  return res;
3162  }
3163 
3164  if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3165  uint8_t *wv_data;
3166  res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3167  if (res < 0) {
3168  av_log(matroska->ctx, AV_LOG_ERROR,
3169  "Error parsing a wavpack block.\n");
3170  goto fail;
3171  }
3172  if (pkt_data != data)
3173  av_freep(&pkt_data);
3174  pkt_data = wv_data;
3175  }
3176 
3177  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3178  AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3179  offset = 8;
3180 
3181  pkt = av_mallocz(sizeof(AVPacket));
3182  if (!pkt) {
3183  if (pkt_data != data)
3184  av_freep(&pkt_data);
3185  return AVERROR(ENOMEM);
3186  }
3187  /* XXX: prevent data copy... */
3188  if (av_new_packet(pkt, pkt_size + offset) < 0) {
3189  av_free(pkt);
3190  res = AVERROR(ENOMEM);
3191  goto fail;
3192  }
3193 
3194  if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3195  uint8_t *buf = pkt->data;
3196  bytestream_put_be32(&buf, pkt_size);
3197  bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3198  }
3199 
3200  memcpy(pkt->data + offset, pkt_data, pkt_size);
3201 
3202  if (pkt_data != data)
3203  av_freep(&pkt_data);
3204 
3205  pkt->flags = is_keyframe;
3206  pkt->stream_index = st->index;
3207 
3208  if (additional_size > 0) {
3209  uint8_t *side_data = av_packet_new_side_data(pkt,
3211  additional_size + 8);
3212  if (!side_data) {
3213  av_packet_unref(pkt);
3214  av_free(pkt);
3215  return AVERROR(ENOMEM);
3216  }
3217  AV_WB64(side_data, additional_id);
3218  memcpy(side_data + 8, additional, additional_size);
3219  }
3220 
3221  if (discard_padding) {
3222  uint8_t *side_data = av_packet_new_side_data(pkt,
3224  10);
3225  if (!side_data) {
3226  av_packet_unref(pkt);
3227  av_free(pkt);
3228  return AVERROR(ENOMEM);
3229  }
3230  discard_padding = av_rescale_q(discard_padding,
3231  (AVRational){1, 1000000000},
3232  (AVRational){1, st->codecpar->sample_rate});
3233  if (discard_padding > 0) {
3234  AV_WL32(side_data + 4, discard_padding);
3235  } else {
3236  AV_WL32(side_data, -discard_padding);
3237  }
3238  }
3239 
3240  if (track->ms_compat)
3241  pkt->dts = timecode;
3242  else
3243  pkt->pts = timecode;
3244  pkt->pos = pos;
3245  pkt->duration = lace_duration;
3246 
3247 #if FF_API_CONVERGENCE_DURATION
3249  if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3250  pkt->convergence_duration = lace_duration;
3251  }
3253 #endif
3254 
3255  dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3256  matroska->prev_pkt = pkt;
3257 
3258  return 0;
3259 
3260 fail:
3261  if (pkt_data != data)
3262  av_freep(&pkt_data);
3263  return res;
3264 }
3265 
3267  int size, int64_t pos, uint64_t cluster_time,
3268  uint64_t block_duration, int is_keyframe,
3269  uint8_t *additional, uint64_t additional_id, int additional_size,
3270  int64_t cluster_pos, int64_t discard_padding)
3271 {
3272  uint64_t timecode = AV_NOPTS_VALUE;
3273  MatroskaTrack *track;
3274  int res = 0;
3275  AVStream *st;
3276  int16_t block_time;
3277  uint32_t *lace_size = NULL;
3278  int n, flags, laces = 0;
3279  uint64_t num;
3280  int trust_default_duration = 1;
3281 
3282  if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3283  av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3284  return n;
3285  }
3286  data += n;
3287  size -= n;
3288 
3289  track = matroska_find_track_by_num(matroska, num);
3290  if (!track || !track->stream) {
3291  av_log(matroska->ctx, AV_LOG_INFO,
3292  "Invalid stream %"PRIu64" or size %u\n", num, size);
3293  return AVERROR_INVALIDDATA;
3294  } else if (size <= 3)
3295  return 0;
3296  st = track->stream;
3297  if (st->discard >= AVDISCARD_ALL)
3298  return res;
3299  av_assert1(block_duration != AV_NOPTS_VALUE);
3300 
3301  block_time = sign_extend(AV_RB16(data), 16);
3302  data += 2;
3303  flags = *data++;
3304  size -= 3;
3305  if (is_keyframe == -1)
3306  is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3307 
3308  if (cluster_time != (uint64_t) -1 &&
3309  (block_time >= 0 || cluster_time >= -block_time)) {
3310  timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3311  if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3312  timecode < track->end_timecode)
3313  is_keyframe = 0; /* overlapping subtitles are not key frame */
3314  if (is_keyframe) {
3315  ff_reduce_index(matroska->ctx, st->index);
3316  av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3318  }
3319  }
3320 
3321  if (matroska->skip_to_keyframe &&
3322  track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3323  // Compare signed timecodes. Timecode may be negative due to codec delay
3324  // offset. We don't support timestamps greater than int64_t anyway - see
3325  // AVPacket's pts.
3326  if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3327  return res;
3328  if (is_keyframe)
3329  matroska->skip_to_keyframe = 0;
3330  else if (!st->skip_to_keyframe) {
3331  av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3332  matroska->skip_to_keyframe = 0;
3333  }
3334  }
3335 
3336  res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3337  &lace_size, &laces);
3338 
3339  if (res)
3340  goto end;
3341 
3342  if (track->audio.samplerate == 8000) {
3343  // If this is needed for more codecs, then add them here
3344  if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3345  if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3346  trust_default_duration = 0;
3347  }
3348  }
3349 
3350  if (!block_duration && trust_default_duration)
3351  block_duration = track->default_duration * laces / matroska->time_scale;
3352 
3353  if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3354  track->end_timecode =
3355  FFMAX(track->end_timecode, timecode + block_duration);
3356 
3357  for (n = 0; n < laces; n++) {
3358  int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3359 
3360  if (lace_size[n] > size) {
3361  av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3362  break;
3363  }
3364 
3365  if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3369  st->codecpar->block_align && track->audio.sub_packet_size) {
3370  res = matroska_parse_rm_audio(matroska, track, st, data,
3371  lace_size[n],
3372  timecode, pos);
3373  if (res)
3374  goto end;
3375 
3376  } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3377  res = matroska_parse_webvtt(matroska, track, st,
3378  data, lace_size[n],
3379  timecode, lace_duration,
3380  pos);
3381  if (res)
3382  goto end;
3383  } else {
3384  res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3385  timecode, lace_duration, pos,
3386  !n ? is_keyframe : 0,
3387  additional, additional_id, additional_size,
3388  discard_padding);
3389  if (res)
3390  goto end;
3391  }
3392 
3393  if (timecode != AV_NOPTS_VALUE)
3394  timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3395  data += lace_size[n];
3396  size -= lace_size[n];
3397  }
3398 
3399 end:
3400  av_free(lace_size);
3401  return res;
3402 }
3403 
3405 {
3406  EbmlList *blocks_list;
3407  MatroskaBlock *blocks;
3408  int i, res;
3409  res = ebml_parse(matroska,
3410  matroska_cluster_incremental_parsing,
3411  &matroska->current_cluster);
3412  if (res == 1) {
3413  /* New Cluster */
3414  if (matroska->current_cluster_pos)
3415  ebml_level_end(matroska);
3416  ebml_free(matroska_cluster, &matroska->current_cluster);
3417  memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3418  matroska->current_cluster_num_blocks = 0;
3419  matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3420  matroska->prev_pkt = NULL;
3421  /* sizeof the ID which was already read */
3422  if (matroska->current_id)
3423  matroska->current_cluster_pos -= 4;
3424  res = ebml_parse(matroska,
3425  matroska_clusters_incremental,
3426  &matroska->current_cluster);
3427  /* Try parsing the block again. */
3428  if (res == 1)
3429  res = ebml_parse(matroska,
3430  matroska_cluster_incremental_parsing,
3431  &matroska->current_cluster);
3432  }
3433 
3434  if (!res &&
3435  matroska->current_cluster_num_blocks <
3436  matroska->current_cluster.blocks.nb_elem) {
3437  blocks_list = &matroska->current_cluster.blocks;
3438  blocks = blocks_list->elem;
3439 
3440  matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3441  i = blocks_list->nb_elem - 1;
3442  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3443  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3444  uint8_t* additional = blocks[i].additional.size > 0 ?
3445  blocks[i].additional.data : NULL;
3446  if (!blocks[i].non_simple)
3447  blocks[i].duration = 0;
3448  res = matroska_parse_block(matroska, blocks[i].bin.data,
3449  blocks[i].bin.size, blocks[i].bin.pos,
3450  matroska->current_cluster.timecode,
3451  blocks[i].duration, is_keyframe,
3452  additional, blocks[i].additional_id,
3453  blocks[i].additional.size,
3454  matroska->current_cluster_pos,
3455  blocks[i].discard_padding);
3456  }
3457  }
3458 
3459  return res;
3460 }
3461 
3463 {
3464  MatroskaCluster cluster = { 0 };
3465  EbmlList *blocks_list;
3466  MatroskaBlock *blocks;
3467  int i, res;
3468  int64_t pos;
3469 
3470  if (!matroska->contains_ssa)
3471  return matroska_parse_cluster_incremental(matroska);
3472  pos = avio_tell(matroska->ctx->pb);
3473  matroska->prev_pkt = NULL;
3474  if (matroska->current_id)
3475  pos -= 4; /* sizeof the ID which was already read */
3476  res = ebml_parse(matroska, matroska_clusters, &cluster);
3477  blocks_list = &cluster.blocks;
3478  blocks = blocks_list->elem;
3479  for (i = 0; i < blocks_list->nb_elem; i++)
3480  if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3481  int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3482  res = matroska_parse_block(matroska, blocks[i].bin.data,
3483  blocks[i].bin.size, blocks[i].bin.pos,
3484  cluster.timecode, blocks[i].duration,
3485  is_keyframe, NULL, 0, 0, pos,
3486  blocks[i].discard_padding);
3487  }
3488  ebml_free(matroska_cluster, &cluster);
3489  return res;
3490 }
3491 
3493 {
3494  MatroskaDemuxContext *matroska = s->priv_data;
3495  int ret = 0;
3496 
3497  while (matroska_deliver_packet(matroska, pkt)) {
3498  int64_t pos = avio_tell(matroska->ctx->pb);
3499  if (matroska->done)
3500  return (ret < 0) ? ret : AVERROR_EOF;
3501  if (matroska_parse_cluster(matroska) < 0)
3502  ret = matroska_resync(matroska, pos);
3503  }
3504 
3505  return ret;
3506 }
3507 
3508 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3509  int64_t timestamp, int flags)
3510 {
3511  MatroskaDemuxContext *matroska = s->priv_data;
3512  MatroskaTrack *tracks = NULL;
3513  AVStream *st = s->streams[stream_index];
3514  int i, index, index_min;
3515 
3516  /* Parse the CUES now since we need the index data to seek. */
3517  if (matroska->cues_parsing_deferred > 0) {
3518  matroska->cues_parsing_deferred = 0;
3519  matroska_parse_cues(matroska);
3520  }
3521 
3522  if (!st->nb_index_entries)
3523  goto err;
3524  timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3525 
3526  if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3527  avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3528  SEEK_SET);
3529  matroska->current_id = 0;
3530  while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3531  matroska_clear_queue(matroska);
3532  if (matroska_parse_cluster(matroska) < 0)
3533  break;
3534  }
3535  }
3536 
3537  matroska_clear_queue(matroska);
3538  if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3539  goto err;
3540 
3541  index_min = index;
3542  tracks = matroska->tracks.elem;
3543  for (i = 0; i < matroska->tracks.nb_elem; i++) {
3544  tracks[i].audio.pkt_cnt = 0;
3545  tracks[i].audio.sub_packet_cnt = 0;
3546  tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3547  tracks[i].end_timecode = 0;
3548  }
3549 
3550  avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3551  matroska->current_id = 0;
3552  if (flags & AVSEEK_FLAG_ANY) {
3553  st->skip_to_keyframe = 0;
3554  matroska->skip_to_timecode = timestamp;
3555  } else {
3556  st->skip_to_keyframe = 1;
3557  matroska->skip_to_timecode = st->index_entries[index].timestamp;
3558  }
3559  matroska->skip_to_keyframe = 1;
3560  matroska->done = 0;
3561  matroska->num_levels = 0;
3562  ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3563  return 0;
3564 err:
3565  // slightly hackish but allows proper fallback to
3566  // the generic seeking code.
3567  matroska_clear_queue(matroska);
3568  matroska->current_id = 0;
3569  st->skip_to_keyframe =
3570  matroska->skip_to_keyframe = 0;
3571  matroska->done = 0;
3572  matroska->num_levels = 0;
3573  return -1;
3574 }
3575 
3577 {
3578  MatroskaDemuxContext *matroska = s->priv_data;
3579  MatroskaTrack *tracks = matroska->tracks.elem;
3580  int n;
3581 
3582  matroska_clear_queue(matroska);
3583 
3584  for (n = 0; n < matroska->tracks.nb_elem; n++)
3585  if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3586  av_freep(&tracks[n].audio.buf);
3587  ebml_free(matroska_cluster, &matroska->current_cluster);
3588  ebml_free(matroska_segment, matroska);
3589 
3590  return 0;
3591 }
3592 
3593 typedef struct {
3594  int64_t start_time_ns;
3595  int64_t end_time_ns;
3596  int64_t start_offset;
3597  int64_t end_offset;
3598 } CueDesc;
3599 
3600 /* This function searches all the Cues and returns the CueDesc corresponding to
3601  * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3602  * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3603  */
3604 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3605  MatroskaDemuxContext *matroska = s->priv_data;
3606  CueDesc cue_desc;
3607  int i;
3608  int nb_index_entries = s->streams[0]->nb_index_entries;
3609  AVIndexEntry *index_entries = s->streams[0]->index_entries;
3610  if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3611  for (i = 1; i < nb_index_entries; i++) {
3612  if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3613  index_entries[i].timestamp * matroska->time_scale > ts) {
3614  break;
3615  }
3616  }
3617  --i;
3618  cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3619  cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3620  if (i != nb_index_entries - 1) {
3621  cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3622  cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3623  } else {
3624  cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3625  // FIXME: this needs special handling for files where Cues appear
3626  // before Clusters. the current logic assumes Cues appear after
3627  // Clusters.
3628  cue_desc.end_offset = cues_start - matroska->segment_start;
3629  }
3630  return cue_desc;
3631 }
3632 
3634 {
3635  MatroskaDemuxContext *matroska = s->priv_data;
3636  int64_t cluster_pos, before_pos;
3637  int index, rv = 1;
3638  if (s->streams[0]->nb_index_entries <= 0) return 0;
3639  // seek to the first cluster using cues.
3640  index = av_index_search_timestamp(s->streams[0], 0, 0);
3641  if (index < 0) return 0;
3642  cluster_pos = s->streams[0]->index_entries[index].pos;
3643  before_pos = avio_tell(s->pb);
3644  while (1) {
3645  int64_t cluster_id = 0, cluster_length = 0;
3646  AVPacket *pkt;
3647  avio_seek(s->pb, cluster_pos, SEEK_SET);
3648  // read cluster id and length
3649  ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3650  ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3651  if (cluster_id != 0xF43B675) { // done with all clusters
3652  break;
3653  }
3654  avio_seek(s->pb, cluster_pos, SEEK_SET);
3655  matroska->current_id = 0;
3656  matroska_clear_queue(matroska);
3657  if (matroska_parse_cluster(matroska) < 0 ||
3658  matroska->num_packets <= 0) {
3659  break;
3660  }
3661  pkt = matroska->packets[0];
3662  cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3663  if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3664  rv = 0;
3665  break;
3666  }
3667  }
3668  avio_seek(s->pb, before_pos, SEEK_SET);
3669  return rv;
3670 }
3671 
3672 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3673  double min_buffer, double* buffer,
3674  double* sec_to_download, AVFormatContext *s,
3675  int64_t cues_start)
3676 {
3677  double nano_seconds_per_second = 1000000000.0;
3678  double time_sec = time_ns / nano_seconds_per_second;
3679  int rv = 0;
3680  int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3681  int64_t end_time_ns = time_ns + time_to_search_ns;
3682  double sec_downloaded = 0.0;
3683  CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3684  if (desc_curr.start_time_ns == -1)
3685  return -1;
3686  *sec_to_download = 0.0;
3687 
3688  // Check for non cue start time.
3689  if (time_ns > desc_curr.start_time_ns) {
3690  int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3691  double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3692  double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3693  double timeToDownload = (cueBytes * 8.0) / bps;
3694 
3695  sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3696  *sec_to_download += timeToDownload;
3697 
3698  // Check if the search ends within the first cue.
3699  if (desc_curr.end_time_ns >= end_time_ns) {
3700  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3701  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3702  sec_downloaded = percent_to_sub * sec_downloaded;
3703  *sec_to_download = percent_to_sub * *sec_to_download;
3704  }
3705 
3706  if ((sec_downloaded + *buffer) <= min_buffer) {
3707  return 1;
3708  }
3709 
3710  // Get the next Cue.
3711  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3712  }
3713 
3714  while (desc_curr.start_time_ns != -1) {
3715  int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3716  int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3717  double desc_sec = desc_ns / nano_seconds_per_second;
3718  double bits = (desc_bytes * 8.0);
3719  double time_to_download = bits / bps;
3720 
3721  sec_downloaded += desc_sec - time_to_download;
3722  *sec_to_download += time_to_download;
3723 
3724  if (desc_curr.end_time_ns >= end_time_ns) {
3725  double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3726  double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3727  sec_downloaded = percent_to_sub * sec_downloaded;
3728  *sec_to_download = percent_to_sub * *sec_to_download;
3729 
3730  if ((sec_downloaded + *buffer) <= min_buffer)
3731  rv = 1;
3732  break;
3733  }
3734 
3735  if ((sec_downloaded + *buffer) <= min_buffer) {
3736  rv = 1;
3737  break;
3738  }
3739 
3740  desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3741  }
3742  *buffer = *buffer + sec_downloaded;
3743  return rv;
3744 }
3745 
3746 /* This function computes the bandwidth of the WebM file with the help of
3747  * buffer_size_after_time_downloaded() function. Both of these functions are
3748  * adapted from WebM Tools project and are adapted to work with FFmpeg's
3749  * Matroska parsing mechanism.
3750  *
3751  * Returns the bandwidth of the file on success; -1 on error.
3752  * */
3753 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3754 {
3755  MatroskaDemuxContext *matroska = s->priv_data;
3756  AVStream *st = s->streams[0];
3757  double bandwidth = 0.0;
3758  int i;
3759 
3760  for (i = 0; i < st->nb_index_entries; i++) {
3761  int64_t prebuffer_ns = 1000000000;
3762  int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3763  double nano_seconds_per_second = 1000000000.0;
3764  int64_t prebuffered_ns = time_ns + prebuffer_ns;
3765  double prebuffer_bytes = 0.0;
3766  int64_t temp_prebuffer_ns = prebuffer_ns;
3767  int64_t pre_bytes, pre_ns;
3768  double pre_sec, prebuffer, bits_per_second;
3769  CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3770 
3771  // Start with the first Cue.
3772  CueDesc desc_end = desc_beg;
3773 
3774  // Figure out how much data we have downloaded for the prebuffer. This will
3775  // be used later to adjust the bits per sample to try.
3776  while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3777  // Prebuffered the entire Cue.
3778  prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3779  temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3780  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3781  }
3782  if (desc_end.start_time_ns == -1) {
3783  // The prebuffer is larger than the duration.
3784  if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3785  return -1;
3786  bits_per_second = 0.0;
3787  } else {
3788  // The prebuffer ends in the last Cue. Estimate how much data was
3789  // prebuffered.
3790  pre_bytes = desc_end.end_offset - desc_end.start_offset;
3791  pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3792  pre_sec = pre_ns / nano_seconds_per_second;
3793  prebuffer_bytes +=
3794  pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3795 
3796  prebuffer = prebuffer_ns / nano_seconds_per_second;
3797 
3798  // Set this to 0.0 in case our prebuffer buffers the entire video.
3799  bits_per_second = 0.0;
3800  do {
3801  int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3802  int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3803  double desc_sec = desc_ns / nano_seconds_per_second;
3804  double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3805 
3806  // Drop the bps by the percentage of bytes buffered.
3807  double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3808  double mod_bits_per_second = calc_bits_per_second * percent;
3809 
3810  if (prebuffer < desc_sec) {
3811  double search_sec =
3812  (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3813 
3814  // Add 1 so the bits per second should be a little bit greater than file
3815  // datarate.
3816  int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3817  const double min_buffer = 0.0;
3818  double buffer = prebuffer;
3819  double sec_to_download = 0.0;
3820 
3821  int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3822  min_buffer, &buffer, &sec_to_download,
3823  s, cues_start);
3824  if (rv < 0) {
3825  return -1;
3826  } else if (rv == 0) {
3827  bits_per_second = (double)(bps);
3828  break;
3829  }
3830  }
3831 
3832  desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3833  } while (desc_end.start_time_ns != -1);
3834  }
3835  if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3836  }
3837  return (int64_t)bandwidth;
3838 }
3839 
3840 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3841 {
3842  MatroskaDemuxContext *matroska = s->priv_data;
3843  EbmlList *seekhead_list = &matroska->seekhead;
3844  MatroskaSeekhead *seekhead = seekhead_list->elem;
3845  char *buf;
3846  int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3847  int i;
3848  int end = 0;
3849 
3850  // determine cues start and end positions
3851  for (i = 0; i < seekhead_list->nb_elem; i++)
3852  if (seekhead[i].id == MATROSKA_ID_CUES)
3853  break;
3854 
3855  if (i >= seekhead_list->nb_elem) return -1;
3856 
3857  before_pos = avio_tell(matroska->ctx->pb);
3858  cues_start = seekhead[i].pos + matroska->segment_start;
3859  if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3860  // cues_end is computed as cues_start + cues_length + length of the
3861  // Cues element ID + EBML length of the Cues element. cues_end is
3862  // inclusive and the above sum is reduced by 1.
3863  uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3864  bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3865  bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3866  cues_end = cues_start + cues_length + bytes_read - 1;
3867  }
3868  avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3869  if (cues_start == -1 || cues_end == -1) return -1;
3870 
3871  // parse the cues
3872  matroska_parse_cues(matroska);
3873 
3874  // cues start
3875  av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3876 
3877  // cues end
3878  av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3879 
3880  // if the file has cues at the start, fix up the init range so tht
3881  // it does not include it
3882  if (cues_start <= init_range)
3883  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3884 
3885  // bandwidth
3886  bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3887  if (bandwidth < 0) return -1;
3888  av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3889 
3890  // check if all clusters start with key frames
3892 
3893  // store cue point timestamps as a comma separated list for checking subsegment alignment in
3894  // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3895  buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3896  if (!buf) return -1;
3897  strcpy(buf, "");
3898  for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3899  int ret = snprintf(buf + end, 20 * sizeof(char),
3900  "%" PRId64, s->streams[0]->index_entries[i].timestamp);
3901  if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3902  av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3903  av_free(buf);
3904  return AVERROR_INVALIDDATA;
3905  }
3906  end += ret;
3907  if (i != s->streams[0]->nb_index_entries - 1) {
3908  strncat(buf, ",", sizeof(char));
3909  end++;
3910  }
3911  }
3912  av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3913  av_free(buf);
3914 
3915  return 0;
3916 }
3917 
3919 {
3920  char *buf;
3921  int ret = matroska_read_header(s);
3922  int64_t init_range;
3923  MatroskaTrack *tracks;
3924  MatroskaDemuxContext *matroska = s->priv_data;
3925  if (ret) {
3926  av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3927  return -1;
3928  }
3929  if (!s->nb_streams) {
3931  av_log(s, AV_LOG_ERROR, "No streams found\n");
3932  return AVERROR_INVALIDDATA;
3933  }
3934 
3935  if (!matroska->is_live) {
3936  buf = av_asprintf("%g", matroska->duration);
3937  if (!buf) return AVERROR(ENOMEM);
3938  av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3939  av_free(buf);
3940 
3941  // initialization range
3942  // 5 is the offset of Cluster ID.
3943  init_range = avio_tell(s->pb) - 5;
3944  av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3945  }
3946 
3947  // basename of the file
3948  buf = strrchr(s->filename, '/');
3949  av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3950 
3951  // track number
3952  tracks = matroska->tracks.elem;
3953  av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3954 
3955  // parse the cues and populate Cue related fields
3956  if (!matroska->is_live) {
3957  ret = webm_dash_manifest_cues(s, init_range);
3958  if (ret < 0) {
3959  av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
3960  return ret;
3961  }
3962  }
3963 
3964  // use the bandwidth from the command line if it was provided
3965  if (matroska->bandwidth > 0) {
3967  matroska->bandwidth, 0);
3968  }
3969  return 0;
3970 }
3971 
3973 {
3974  return AVERROR_EOF;
3975 }
3976 
3977 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3978 static const AVOption options[] = {
3979  { "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 },
3980  { "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 },
3981  { NULL },
3982 };
3983 
3984 static const AVClass webm_dash_class = {
3985  .class_name = "WebM DASH Manifest demuxer",
3986  .item_name = av_default_item_name,
3987  .option = options,
3988  .version = LIBAVUTIL_VERSION_INT,
3989 };
3990 
3992  .name = "matroska,webm",
3993  .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3994  .extensions = "mkv,mk3d,mka,mks",
3995  .priv_data_size = sizeof(MatroskaDemuxContext),
4001  .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4002 };
4003 
4005  .name = "webm_dash_manifest",
4006  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4007  .priv_data_size = sizeof(MatroskaDemuxContext),
4011  .priv_class = &webm_dash_class,
4012 };
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:234
enum AVChromaLocation chroma_location
Definition: avcodec.h:3928
#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:3919
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:467
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:2872
const char * s
Definition: avisynth_c.h:768
uint32_t fourcc
Definition: hwcontext_qsv.c:90
Bytestream IO Context.
Definition: avio.h:161
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:3926
#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:228
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:1506
#define MATROSKA_ID_DATEUTC
Definition: matroska.h:71
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1296
uint64_t type
Definition: matroskadec.c:219
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:3972
#define MATROSKA_ID_TRACKENTRY
Definition: matroska.h:75
static int matroska_deliver_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
Definition: matroskadec.c:2708
#define MATROSKA_ID_VIDEODISPLAYHEIGHT
Definition: matroska.h:113
uint64_t version
Definition: matroskadec.c:112
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:3991
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static int is_keyframe(NalUnitType naltype)
Definition: libx265.c:52
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:1982
#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:3052
#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:181
#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:1434
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska, uint8_t *data, uint32_t size, int64_t *num)
Definition: matroskadec.c:1019
static int webm_clusters_start_with_keyframe(AVFormatContext *s)
Definition: matroskadec.c:3633
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:4748
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:285
static const EbmlSyntax matroska_track_video[]
Definition: matroskadec.c:450
#define AVSEEK_FLAG_ANY
seek to any frame, even non-keyframes
Definition: avformat.h:2413
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:291
uint64_t uid
Definition: matroskadec.c:218
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
Video represents a portion of a sphere mapped on a flat surface using equirectangular projection...
Definition: spherical.h:72
static int matroska_parse_frame(MatroskaDemuxContext *matroska, MatroskaTrack *track, AVStream *st, uint8_t *data, int pkt_size, uint64_t timecode, uint64_t lace_duration, int64_t pos, int is_keyframe, uint8_t *additional, uint64_t additional_id, int additional_size, int64_t discard_padding)
Definition: matroskadec.c:3145
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3838
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:934
#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:873
#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:244
#define MATROSKA_ID_FILEDATA
Definition: matroska.h:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:193
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1096
MatroskaTrackVideoProjection projection
Definition: matroskadec.c:187
#define EBML_ID_DOCTYPEREADVERSION
Definition: matroska.h:42
#define MATROSKA_ID_BLOCKREFERENCE
Definition: matroska.h:237
uint64_t flag_forced
Definition: matroskadec.c:227
int av_log2(unsigned v)
Definition: intmath.c:26
uint64_t max_size
Definition: matroskadec.c:113
#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:226
#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
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:123
#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:274
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
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:791
#define MATROSKA_ID_VIDEOPROJECTIONTYPE
Definition: matroska.h:157
MatroskaLevel levels[EBML_MAX_DEPTH]
Definition: matroskadec.c:321
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:784
MatroskaTrackAudio audio
Definition: matroskadec.c:230
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:3927
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:3959
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1322
#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:4505
#define EBML_VERSION
Definition: matroska.h:30
#define MATROSKA_ID_FILEDESC
Definition: matroska.h:243
Format I/O context.
Definition: avformat.h:1325
#define EBML_ID_CRC32
Definition: matroska.h:46
uint64_t def
Definition: matroskadec.c:277
UID uid
Definition: mxfenc.c:1946
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:1896
#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:237
static int webm_dash_manifest_read_header(AVFormatContext *s)
Definition: matroskadec.c:3918
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:1910
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1438
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:230
static const EbmlSyntax matroska_chapters[]
Definition: matroskadec.c:603
static MatroskaLevel1Element * matroska_find_level1_elem(MatroskaDemuxContext *matroska, uint32_t id)
Definition: matroskadec.c:1118
uint64_t pixel_height
Definition: matroskadec.c:179
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:367
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:184
MatroskaTrackOperation operation
Definition: matroskadec.c:231
MatroskaTrackVideo video
Definition: matroskadec.c:229
#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:3904
static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start)
Definition: matroskadec.c:3604
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:132
uint8_t * data
Definition: matroskadec.c:107
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:75
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:799
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
uint64_t time
Definition: matroskadec.c:269
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
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1432
#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:1713
enum AVStreamParseType need_parsing
Definition: avformat.h:1085
#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:251
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4378
#define MATROSKA_ID_CODECNAME
Definition: matroska.h:90
char * language
Definition: matroskadec.c:223
#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:1393
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:3967
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:1436
uint8_t * data
Definition: avcodec.h:1414
uint64_t typevalue
Definition: matroskadec.c:283
uint64_t codec_delay
Definition: matroskadec.c:233
static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3404
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord)
Definition: vf_neighbor.c:129
#define MATROSKA_ID_VIDEODISPLAYWIDTH
Definition: matroska.h:112
#define MATROSKA_ID_EDITIONUID
Definition: matroska.h:258
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
static int flags
Definition: log.c:57
#define MATROSKA_ID_BLOCKADDITIONS
Definition: matroska.h:228
uint32_t tag
Definition: movenc.c:1448
static const EbmlSyntax matroska_index[]
Definition: matroskadec.c:623
int64_t start_time_ns
Definition: matroskadec.c:3594
#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:1836
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:866
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
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:216
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:198
#define MATROSKA_ID_SEGMENTUID
Definition: matroska.h:72
uint64_t channel_layout
Audio only.
Definition: avcodec.h:3940
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:646
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:854
EbmlList sub
Definition: matroskadec.c:278
static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska, uint64_t pos)
Definition: matroskadec.c:1571
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3867
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1446
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
Definition: matroskadec.c:3462
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data)
Definition: matroskadec.c:1071
#define MATROSKA_ID_CUEBLOCKNUMBER
Definition: matroska.h:199
#define MATROSKA_ID_TRACKUID
Definition: matroska.h:79
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
uint64_t display_height
Definition: matroskadec.c:177
#define U(x)
Definition: vp56_arith.h:37
#define MATROSKA_ID_ENCODINGORDER
Definition: matroska.h:171
#define MATROSKA_ID_VIDEOSTEREOMODE
Definition:<