2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
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.
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.
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
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/
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"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
86 typedef const struct EbmlSyntax {
96 const struct EbmlSyntax *n;
100 typedef struct EbmlList {
105 typedef struct EbmlBin {
111 typedef struct Ebml {
116 uint64_t doctype_version;
119 typedef struct MatroskaTrackCompression {
122 } MatroskaTrackCompression;
124 typedef struct MatroskaTrackEncryption {
127 } MatroskaTrackEncryption;
129 typedef struct MatroskaTrackEncoding {
132 MatroskaTrackCompression compression;
133 MatroskaTrackEncryption encryption;
134 } MatroskaTrackEncoding;
136 typedef struct MatroskaMasteringMeta {
145 double max_luminance;
146 double min_luminance;
147 } MatroskaMasteringMeta;
149 typedef struct MatroskaTrackVideoColor {
150 uint64_t matrix_coefficients;
151 uint64_t bits_per_channel;
152 uint64_t chroma_sub_horz;
153 uint64_t chroma_sub_vert;
154 uint64_t cb_sub_horz;
155 uint64_t cb_sub_vert;
156 uint64_t chroma_siting_horz;
157 uint64_t chroma_siting_vert;
159 uint64_t transfer_characteristics;
163 MatroskaMasteringMeta mastering_meta;
164 } MatroskaTrackVideoColor;
166 typedef struct MatroskaTrackVideoProjection {
172 } MatroskaTrackVideoProjection;
174 typedef struct MatroskaTrackVideo {
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;
183 uint64_t field_order;
184 uint64_t stereo_mode;
187 MatroskaTrackVideoProjection projection;
188 } MatroskaTrackVideo;
190 typedef struct MatroskaTrackAudio {
192 double out_samplerate;
196 /* real audio header (extracted from extradata) */
203 uint64_t buf_timecode;
205 } MatroskaTrackAudio;
207 typedef struct MatroskaTrackPlane {
210 } MatroskaTrackPlane;
212 typedef struct MatroskaTrackOperation {
213 EbmlList combine_planes;
214 } MatroskaTrackOperation;
216 typedef struct MatroskaTrack {
225 uint64_t default_duration;
226 uint64_t flag_default;
227 uint64_t flag_forced;
228 uint64_t seek_preroll;
229 MatroskaTrackVideo video;
230 MatroskaTrackAudio audio;
231 MatroskaTrackOperation operation;
233 uint64_t codec_delay;
234 uint64_t codec_delay_in_track_tb;
237 int64_t end_timecode;
239 uint64_t max_block_additional_id;
241 uint32_t palette[AVPALETTE_COUNT];
245 typedef struct MatroskaAttachment {
252 } MatroskaAttachment;
254 typedef struct MatroskaChapter {
263 typedef struct MatroskaIndexPos {
268 typedef struct MatroskaIndex {
273 typedef struct MatroskaTag {
281 typedef struct MatroskaTagTarget {
289 typedef struct MatroskaTags {
290 MatroskaTagTarget target;
294 typedef struct MatroskaSeekhead {
299 typedef struct MatroskaLevel {
304 typedef struct MatroskaCluster {
309 typedef struct MatroskaLevel1Element {
313 } MatroskaLevel1Element;
315 typedef struct MatroskaDemuxContext {
316 const AVClass *class;
317 AVFormatContext *ctx;
321 MatroskaLevel levels[EBML_MAX_DEPTH];
331 EbmlList attachments;
337 /* byte position of the segment inside the stream */
338 int64_t segment_start;
340 /* the packet queue */
347 /* What to skip before effectively reading a packet. */
348 int skip_to_keyframe;
349 uint64_t skip_to_timecode;
351 /* File has a CUES element, but we defer parsing until it is needed. */
352 int cues_parsing_deferred;
354 /* Level1 elements and whether they were read yet */
355 MatroskaLevel1Element level1_elems[64];
356 int num_level1_elems;
358 int current_cluster_num_blocks;
359 int64_t current_cluster_pos;
360 MatroskaCluster current_cluster;
362 /* File has SSA subtitles which prevent incremental cluster parsing. */
365 /* WebM DASH Manifest live flag/ */
367 } MatroskaDemuxContext;
369 typedef struct MatroskaBlock {
374 uint64_t additional_id;
376 int64_t discard_padding;
379 static const EbmlSyntax ebml_header[] = {
380 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
381 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
382 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
383 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
384 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
385 { EBML_ID_EBMLVERSION, EBML_NONE },
386 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
390 static const EbmlSyntax ebml_syntax[] = {
391 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
395 static const EbmlSyntax matroska_info[] = {
396 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
397 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
398 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
399 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
400 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
401 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
402 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
406 static const EbmlSyntax matroska_mastering_meta[] = {
407 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
408 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
420 static const EbmlSyntax matroska_track_video_color[] = {
421 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
422 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
423 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
429 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
430 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
433 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
434 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
438 static const EbmlSyntax matroska_track_video_projection[] = {
439 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
440 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
441 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
447 static const EbmlSyntax matroska_track_video[] = {
448 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
449 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
450 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
451 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
452 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
453 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
454 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
455 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
456 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
457 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
458 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
461 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
462 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
463 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
464 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
465 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
469 static const EbmlSyntax matroska_track_audio[] = {
470 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
471 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
472 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
473 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
477 static const EbmlSyntax matroska_track_encoding_compression[] = {
478 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
479 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
483 static const EbmlSyntax matroska_track_encoding_encryption[] = {
484 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
485 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
486 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
487 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
493 static const EbmlSyntax matroska_track_encoding[] = {
494 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
495 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
496 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
497 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
498 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
502 static const EbmlSyntax matroska_track_encodings[] = {
503 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
507 static const EbmlSyntax matroska_track_plane[] = {
508 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
509 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
513 static const EbmlSyntax matroska_track_combine_planes[] = {
514 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
518 static const EbmlSyntax matroska_track_operation[] = {
519 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
523 static const EbmlSyntax matroska_track[] = {
524 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
525 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
526 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
527 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
528 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
529 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
530 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
531 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
532 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
533 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
534 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
535 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
536 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
537 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
538 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
539 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
540 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
541 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
542 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
543 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
544 { MATROSKA_ID_CODECNAME, EBML_NONE },
545 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
546 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
547 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
548 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
549 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
553 static const EbmlSyntax matroska_tracks[] = {
554 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
558 static const EbmlSyntax matroska_attachment[] = {
559 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
560 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
561 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
562 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
563 { MATROSKA_ID_FILEDESC, EBML_NONE },
567 static const EbmlSyntax matroska_attachments[] = {
568 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
572 static const EbmlSyntax matroska_chapter_display[] = {
573 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
574 { MATROSKA_ID_CHAPLANG, EBML_NONE },
575 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
579 static const EbmlSyntax matroska_chapter_entry[] = {
580 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
581 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
582 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
583 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
584 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
585 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
586 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
587 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
591 static const EbmlSyntax matroska_chapter[] = {
592 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
593 { MATROSKA_ID_EDITIONUID, EBML_NONE },
594 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
600 static const EbmlSyntax matroska_chapters[] = {
601 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
605 static const EbmlSyntax matroska_index_pos[] = {
606 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
607 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
608 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
609 { MATROSKA_ID_CUEDURATION, EBML_NONE },
610 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
614 static const EbmlSyntax matroska_index_entry[] = {
615 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
616 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
620 static const EbmlSyntax matroska_index[] = {
621 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
625 static const EbmlSyntax matroska_simpletag[] = {
626 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
627 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
628 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
629 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
630 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
631 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
635 static const EbmlSyntax matroska_tagtargets[] = {
636 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
637 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
638 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
639 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
640 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
644 static const EbmlSyntax matroska_tag[] = {
645 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
646 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
650 static const EbmlSyntax matroska_tags[] = {
651 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
655 static const EbmlSyntax matroska_seekhead_entry[] = {
656 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
657 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
661 static const EbmlSyntax matroska_seekhead[] = {
662 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
666 static const EbmlSyntax matroska_segment[] = {
667 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
668 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
669 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
670 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
671 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
672 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
673 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
674 { MATROSKA_ID_CLUSTER, EBML_STOP },
678 static const EbmlSyntax matroska_segments[] = {
679 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
683 static const EbmlSyntax matroska_blockmore[] = {
684 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
685 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
689 static const EbmlSyntax matroska_blockadditions[] = {
690 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
694 static const EbmlSyntax matroska_blockgroup[] = {
695 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
696 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
697 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
698 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
699 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
700 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
701 { MATROSKA_ID_CODECSTATE, EBML_NONE },
702 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706 static const EbmlSyntax matroska_cluster[] = {
707 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
708 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
709 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
710 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
711 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
715 static const EbmlSyntax matroska_clusters[] = {
716 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
717 { MATROSKA_ID_INFO, EBML_NONE },
718 { MATROSKA_ID_CUES, EBML_NONE },
719 { MATROSKA_ID_TAGS, EBML_NONE },
720 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
724 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
725 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
726 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
727 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
728 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
729 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
730 { MATROSKA_ID_INFO, EBML_NONE },
731 { MATROSKA_ID_CUES, EBML_NONE },
732 { MATROSKA_ID_TAGS, EBML_NONE },
733 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
734 { MATROSKA_ID_CLUSTER, EBML_STOP },
738 static const EbmlSyntax matroska_cluster_incremental[] = {
739 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
740 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
741 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
742 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
743 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
747 static const EbmlSyntax matroska_clusters_incremental[] = {
748 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
749 { MATROSKA_ID_INFO, EBML_NONE },
750 { MATROSKA_ID_CUES, EBML_NONE },
751 { MATROSKA_ID_TAGS, EBML_NONE },
752 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
756 static const char *const matroska_doctypes[] = { "matroska", "webm" };
758 static int matroska_read_close(AVFormatContext *s);
760 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
762 AVIOContext *pb = matroska->ctx->pb;
765 matroska->current_id = 0;
766 matroska->num_levels = 0;
768 /* seek to next position to resync from */
769 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
776 // try to find a toplevel element
777 while (!avio_feof(pb)) {
778 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
779 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
780 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
781 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
782 matroska->current_id = id;
785 id = (id << 8) | avio_r8(pb);
793 * Return: Whether we reached the end of a level in the hierarchy or not.
795 static int ebml_level_end(MatroskaDemuxContext *matroska)
797 AVIOContext *pb = matroska->ctx->pb;
798 int64_t pos = avio_tell(pb);
800 if (matroska->num_levels > 0) {
801 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
802 if (pos - level->start >= level->length || matroska->current_id) {
803 matroska->num_levels--;
807 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
811 * Read: an "EBML number", which is defined as a variable-length
812 * array of bytes. The first byte indicates the length by giving a
813 * number of 0-bits followed by a one. The position of the first
814 * "one" bit inside the first byte indicates the length of this
816 * Returns: number of bytes read, < 0 on error
818 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
819 int max_size, uint64_t *number)
824 /* The first byte tells us the length in bytes - avio_r8() can normally
825 * return 0, but since that's not a valid first ebmlID byte, we can
826 * use it safely here to catch EOS. */
827 if (!(total = avio_r8(pb))) {
828 /* we might encounter EOS here */
829 if (!avio_feof(pb)) {
830 int64_t pos = avio_tell(pb);
831 av_log(matroska->ctx, AV_LOG_ERROR,
832 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
834 return pb->error ? pb->error : AVERROR(EIO);
839 /* get the length of the EBML number */
840 read = 8 - ff_log2_tab[total];
841 if (read > max_size) {
842 int64_t pos = avio_tell(pb) - 1;
843 av_log(matroska->ctx, AV_LOG_ERROR,
844 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
845 (uint8_t) total, pos, pos);
846 return AVERROR_INVALIDDATA;
849 /* read out length */
850 total ^= 1 << ff_log2_tab[total];
852 total = (total << 8) | avio_r8(pb);
860 * Read a EBML length value.
861 * This needs special handling for the "unknown length" case which has multiple
864 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
867 int res = ebml_read_num(matroska, pb, 8, number);
868 if (res > 0 && *number + 1 == 1ULL << (7 * res))
869 *number = 0xffffffffffffffULL;
874 * Read the next element as an unsigned int.
875 * 0 is success, < 0 is failure.
877 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
882 return AVERROR_INVALIDDATA;
884 /* big-endian ordering; build up number */
887 *num = (*num << 8) | avio_r8(pb);
893 * Read the next element as a signed int.
894 * 0 is success, < 0 is failure.
896 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
901 return AVERROR_INVALIDDATA;
906 *num = sign_extend(avio_r8(pb), 8);
908 /* big-endian ordering; build up number */
910 *num = ((uint64_t)*num << 8) | avio_r8(pb);
917 * Read the next element as a float.
918 * 0 is success, < 0 is failure.
920 static int ebml_read_float(AVIOContext *pb, int size, double *num)
925 *num = av_int2float(avio_rb32(pb));
927 *num = av_int2double(avio_rb64(pb));
929 return AVERROR_INVALIDDATA;
935 * Read the next element as an ASCII string.
936 * 0 is success, < 0 is failure.
938 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
942 /* EBML strings are usually not 0-terminated, so we allocate one
943 * byte more, read the string and NULL-terminate it ourselves. */
944 if (!(res = av_malloc(size + 1)))
945 return AVERROR(ENOMEM);
946 if (avio_read(pb, (uint8_t *) res, size) != size) {
958 * Read the next element as binary data.
959 * 0 is success, < 0 is failure.
961 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
963 av_fast_padded_malloc(&bin->data, &bin->size, length);
965 return AVERROR(ENOMEM);
968 bin->pos = avio_tell(pb);
969 if (avio_read(pb, bin->data, length) != length) {
970 av_freep(&bin->data);
979 * Read the next element, but only the header. The contents
980 * are supposed to be sub-elements which can be read separately.
981 * 0 is success, < 0 is failure.
983 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
985 AVIOContext *pb = matroska->ctx->pb;
986 MatroskaLevel *level;
988 if (matroska->num_levels >= EBML_MAX_DEPTH) {
989 av_log(matroska->ctx, AV_LOG_ERROR,
990 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
991 return AVERROR(ENOSYS);
994 level = &matroska->levels[matroska->num_levels++];
995 level->start = avio_tell(pb);
996 level->length = length;
1002 * Read signed/unsigned "EBML" numbers.
1003 * Return: number of bytes processed, < 0 on error
1005 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1006 uint8_t *data, uint32_t size, uint64_t *num)
1009 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1010 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1014 * Same as above, but signed.
1016 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1017 uint8_t *data, uint32_t size, int64_t *num)
1022 /* read as unsigned number first */
1023 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1026 /* make signed (weird way) */
1027 *num = unum - ((1LL << (7 * res - 1)) - 1);
1032 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1033 EbmlSyntax *syntax, void *data);
1035 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1036 uint32_t id, void *data)
1039 for (i = 0; syntax[i].id; i++)
1040 if (id == syntax[i].id)
1042 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1043 matroska->num_levels > 0 &&
1044 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1045 return 0; // we reached the end of an unknown size cluster
1046 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1047 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1049 return ebml_parse_elem(matroska, &syntax[i], data);
1052 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1055 if (!matroska->current_id) {
1057 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1059 // in live mode, finish parsing if EOF is reached.
1060 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1061 res == AVERROR_EOF) ? 1 : res;
1063 matroska->current_id = id | 1 << 7 * res;
1065 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1068 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1073 for (i = 0; syntax[i].id; i++)
1074 switch (syntax[i].type) {
1076 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1079 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1082 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1086 // the default may be NULL
1087 if (syntax[i].def.s) {
1088 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1089 *dst = av_strdup(syntax[i].def.s);
1091 return AVERROR(ENOMEM);
1096 while (!res && !ebml_level_end(matroska))
1097 res = ebml_parse(matroska, syntax, data);
1102 static int is_ebml_id_valid(uint32_t id)
1104 // Due to endian nonsense in Matroska, the highest byte with any bits set
1105 // will contain the leading length bit. This bit in turn identifies the
1106 // total byte length of the element by its position within the byte.
1107 unsigned int bits = av_log2(id);
1108 return id && (bits + 7) / 8 == (8 - bits % 8);
1112 * Allocate and return the entry for the level1 element with the given ID. If
1113 * an entry already exists, return the existing entry.
1115 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1119 MatroskaLevel1Element *elem;
1121 if (!is_ebml_id_valid(id))
1124 // Some files link to all clusters; useless.
1125 if (id == MATROSKA_ID_CLUSTER)
1128 // There can be multiple seekheads.
1129 if (id != MATROSKA_ID_SEEKHEAD) {
1130 for (i = 0; i < matroska->num_level1_elems; i++) {
1131 if (matroska->level1_elems[i].id == id)
1132 return &matroska->level1_elems[i];
1136 // Only a completely broken file would have more elements.
1137 // It also provides a low-effort way to escape from circular seekheads
1138 // (every iteration will add a level1 entry).
1139 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1140 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1144 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1145 *elem = (MatroskaLevel1Element){.id = id};
1150 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1151 EbmlSyntax *syntax, void *data)
1153 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1156 // max. 16 MB for strings
1157 [EBML_STR] = 0x1000000,
1158 [EBML_UTF8] = 0x1000000,
1159 // max. 256 MB for binary data
1160 [EBML_BIN] = 0x10000000,
1161 // no limits for anything else
1163 AVIOContext *pb = matroska->ctx->pb;
1164 uint32_t id = syntax->id;
1168 MatroskaLevel1Element *level1_elem;
1170 data = (char *) data + syntax->data_offset;
1171 if (syntax->list_elem_size) {
1172 EbmlList *list = data;
1173 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1175 return AVERROR(ENOMEM);
1176 list->elem = newelem;
1177 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1178 memset(data, 0, syntax->list_elem_size);
1182 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1183 matroska->current_id = 0;
1184 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1186 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1187 av_log(matroska->ctx, AV_LOG_ERROR,
1188 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1189 length, max_lengths[syntax->type], syntax->type);
1190 return AVERROR_INVALIDDATA;
1194 switch (syntax->type) {
1196 res = ebml_read_uint(pb, length, data);
1199 res = ebml_read_sint(pb, length, data);
1202 res = ebml_read_float(pb, length, data);
1206 res = ebml_read_ascii(pb, length, data);
1209 res = ebml_read_binary(pb, length, data);
1213 if ((res = ebml_read_master(matroska, length)) < 0)
1215 if (id == MATROSKA_ID_SEGMENT)
1216 matroska->segment_start = avio_tell(matroska->ctx->pb);
1217 if (id == MATROSKA_ID_CUES)
1218 matroska->cues_parsing_deferred = 0;
1219 if (syntax->type == EBML_LEVEL1 &&
1220 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1221 if (level1_elem->parsed)
1222 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1223 level1_elem->parsed = 1;
1225 return ebml_parse_nest(matroska, syntax->def.n, data);
1227 return ebml_parse_id(matroska, syntax->def.n, id, data);
1231 if (ffio_limit(pb, length) != length)
1232 return AVERROR(EIO);
1233 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1235 if (res == AVERROR_INVALIDDATA)
1236 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1237 else if (res == AVERROR(EIO))
1238 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1242 static void ebml_free(EbmlSyntax *syntax, void *data)
1245 for (i = 0; syntax[i].id; i++) {
1246 void *data_off = (char *) data + syntax[i].data_offset;
1247 switch (syntax[i].type) {
1253 av_freep(&((EbmlBin *) data_off)->data);
1257 if (syntax[i].list_elem_size) {
1258 EbmlList *list = data_off;
1259 char *ptr = list->elem;
1260 for (j = 0; j < list->nb_elem;
1261 j++, ptr += syntax[i].list_elem_size)
1262 ebml_free(syntax[i].def.n, ptr);
1263 av_freep(&list->elem);
1266 ebml_free(syntax[i].def.n, data_off);
1276 static int matroska_probe(AVProbeData *p)
1279 int len_mask = 0x80, size = 1, n = 1, i;
1282 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1285 /* length of header */
1287 while (size <= 8 && !(total & len_mask)) {
1293 total &= (len_mask - 1);
1295 total = (total << 8) | p->buf[4 + n++];
1297 /* Does the probe data contain the whole header? */
1298 if (p->buf_size < 4 + size + total)
1301 /* The header should contain a known document type. For now,
1302 * we don't parse the whole header but simply check for the
1303 * availability of that array of characters inside the header.
1304 * Not fully fool-proof, but good enough. */
1305 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1306 size_t probelen = strlen(matroska_doctypes[i]);
1307 if (total < probelen)
1309 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1310 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1311 return AVPROBE_SCORE_MAX;
1314 // probably valid EBML header but no recognized doctype
1315 return AVPROBE_SCORE_EXTENSION;
1318 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1321 MatroskaTrack *tracks = matroska->tracks.elem;
1324 for (i = 0; i < matroska->tracks.nb_elem; i++)
1325 if (tracks[i].num == num)
1328 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1332 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1333 MatroskaTrack *track)
1335 MatroskaTrackEncoding *encodings = track->encodings.elem;
1336 uint8_t *data = *buf;
1337 int isize = *buf_size;
1338 uint8_t *pkt_data = NULL;
1339 uint8_t av_unused *newpktdata;
1340 int pkt_size = isize;
1344 if (pkt_size >= 10000000U)
1345 return AVERROR_INVALIDDATA;
1347 switch (encodings[0].compression.algo) {
1348 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1350 int header_size = encodings[0].compression.settings.size;
1351 uint8_t *header = encodings[0].compression.settings.data;
1353 if (header_size && !header) {
1354 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1361 pkt_size = isize + header_size;
1362 pkt_data = av_malloc(pkt_size);
1364 return AVERROR(ENOMEM);
1366 memcpy(pkt_data, header, header_size);
1367 memcpy(pkt_data + header_size, data, isize);
1371 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1373 olen = pkt_size *= 3;
1374 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1376 result = AVERROR(ENOMEM);
1379 pkt_data = newpktdata;
1380 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1381 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1383 result = AVERROR_INVALIDDATA;
1390 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1392 z_stream zstream = { 0 };
1393 if (inflateInit(&zstream) != Z_OK)
1395 zstream.next_in = data;
1396 zstream.avail_in = isize;
1399 newpktdata = av_realloc(pkt_data, pkt_size);
1401 inflateEnd(&zstream);
1402 result = AVERROR(ENOMEM);
1405 pkt_data = newpktdata;
1406 zstream.avail_out = pkt_size - zstream.total_out;
1407 zstream.next_out = pkt_data + zstream.total_out;
1408 result = inflate(&zstream, Z_NO_FLUSH);
1409 } while (result == Z_OK && pkt_size < 10000000);
1410 pkt_size = zstream.total_out;
1411 inflateEnd(&zstream);
1412 if (result != Z_STREAM_END) {
1413 if (result == Z_MEM_ERROR)
1414 result = AVERROR(ENOMEM);
1416 result = AVERROR_INVALIDDATA;
1423 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1425 bz_stream bzstream = { 0 };
1426 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1428 bzstream.next_in = data;
1429 bzstream.avail_in = isize;
1432 newpktdata = av_realloc(pkt_data, pkt_size);
1434 BZ2_bzDecompressEnd(&bzstream);
1435 result = AVERROR(ENOMEM);
1438 pkt_data = newpktdata;
1439 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1440 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1441 result = BZ2_bzDecompress(&bzstream);
1442 } while (result == BZ_OK && pkt_size < 10000000);
1443 pkt_size = bzstream.total_out_lo32;
1444 BZ2_bzDecompressEnd(&bzstream);
1445 if (result != BZ_STREAM_END) {
1446 if (result == BZ_MEM_ERROR)
1447 result = AVERROR(ENOMEM);
1449 result = AVERROR_INVALIDDATA;
1456 return AVERROR_INVALIDDATA;
1460 *buf_size = pkt_size;
1468 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1469 AVDictionary **metadata, char *prefix)
1471 MatroskaTag *tags = list->elem;
1475 for (i = 0; i < list->nb_elem; i++) {
1476 const char *lang = tags[i].lang &&
1477 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1479 if (!tags[i].name) {
1480 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1484 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1486 av_strlcpy(key, tags[i].name, sizeof(key));
1487 if (tags[i].def || !lang) {
1488 av_dict_set(metadata, key, tags[i].string, 0);
1489 if (tags[i].sub.nb_elem)
1490 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1493 av_strlcat(key, "-", sizeof(key));
1494 av_strlcat(key, lang, sizeof(key));
1495 av_dict_set(metadata, key, tags[i].string, 0);
1496 if (tags[i].sub.nb_elem)
1497 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1500 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1503 static void matroska_convert_tags(AVFormatContext *s)
1505 MatroskaDemuxContext *matroska = s->priv_data;
1506 MatroskaTags *tags = matroska->tags.elem;
1509 for (i = 0; i < matroska->tags.nb_elem; i++) {
1510 if (tags[i].target.attachuid) {
1511 MatroskaAttachment *attachment = matroska->attachments.elem;
1513 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1514 if (attachment[j].uid == tags[i].target.attachuid &&
1515 attachment[j].stream) {
1516 matroska_convert_tag(s, &tags[i].tag,
1517 &attachment[j].stream->metadata, NULL);
1522 av_log(NULL, AV_LOG_WARNING,
1523 "The tags at index %d refer to a "
1524 "non-existent attachment %"PRId64".\n",
1525 i, tags[i].target.attachuid);
1527 } else if (tags[i].target.chapteruid) {
1528 MatroskaChapter *chapter = matroska->chapters.elem;
1530 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1531 if (chapter[j].uid == tags[i].target.chapteruid &&
1532 chapter[j].chapter) {
1533 matroska_convert_tag(s, &tags[i].tag,
1534 &chapter[j].chapter->metadata, NULL);
1539 av_log(NULL, AV_LOG_WARNING,
1540 "The tags at index %d refer to a non-existent chapter "
1542 i, tags[i].target.chapteruid);
1544 } else if (tags[i].target.trackuid) {
1545 MatroskaTrack *track = matroska->tracks.elem;
1547 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1548 if (track[j].uid == tags[i].target.trackuid &&
1550 matroska_convert_tag(s, &tags[i].tag,
1551 &track[j].stream->metadata, NULL);
1556 av_log(NULL, AV_LOG_WARNING,
1557 "The tags at index %d refer to a non-existent track "
1559 i, tags[i].target.trackuid);
1562 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1563 tags[i].target.type);
1568 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1571 uint32_t level_up = matroska->level_up;
1572 uint32_t saved_id = matroska->current_id;
1573 int64_t before_pos = avio_tell(matroska->ctx->pb);
1574 MatroskaLevel level;
1579 offset = pos + matroska->segment_start;
1580 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1581 /* We don't want to lose our seekhead level, so we add
1582 * a dummy. This is a crude hack. */
1583 if (matroska->num_levels == EBML_MAX_DEPTH) {
1584 av_log(matroska->ctx, AV_LOG_INFO,
1585 "Max EBML element depth (%d) reached, "
1586 "cannot parse further.\n", EBML_MAX_DEPTH);
1587 ret = AVERROR_INVALIDDATA;
1590 level.length = (uint64_t) -1;
1591 matroska->levels[matroska->num_levels] = level;
1592 matroska->num_levels++;
1593 matroska->current_id = 0;
1595 ret = ebml_parse(matroska, matroska_segment, matroska);
1597 /* remove dummy level */
1598 while (matroska->num_levels) {
1599 uint64_t length = matroska->levels[--matroska->num_levels].length;
1600 if (length == (uint64_t) -1)
1606 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1607 matroska->level_up = level_up;
1608 matroska->current_id = saved_id;
1613 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1615 EbmlList *seekhead_list = &matroska->seekhead;
1618 // we should not do any seeking in the streaming case
1619 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1622 for (i = 0; i < seekhead_list->nb_elem; i++) {
1623 MatroskaSeekhead *seekheads = seekhead_list->elem;
1624 uint32_t id = seekheads[i].id;
1625 uint64_t pos = seekheads[i].pos;
1627 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1628 if (!elem || elem->parsed)
1633 // defer cues parsing until we actually need cue data.
1634 if (id == MATROSKA_ID_CUES)
1637 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1638 // mark index as broken
1639 matroska->cues_parsing_deferred = -1;
1647 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1649 EbmlList *index_list;
1650 MatroskaIndex *index;
1651 uint64_t index_scale = 1;
1654 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1657 index_list = &matroska->index;
1658 index = index_list->elem;
1659 if (index_list->nb_elem < 2)
1661 if (index[1].time > 1E14 / matroska->time_scale) {
1662 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1665 for (i = 0; i < index_list->nb_elem; i++) {
1666 EbmlList *pos_list = &index[i].pos;
1667 MatroskaIndexPos *pos = pos_list->elem;
1668 for (j = 0; j < pos_list->nb_elem; j++) {
1669 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1671 if (track && track->stream)
1672 av_add_index_entry(track->stream,
1673 pos[j].pos + matroska->segment_start,
1674 index[i].time / index_scale, 0, 0,
1680 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1683 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1686 for (i = 0; i < matroska->num_level1_elems; i++) {
1687 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1688 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1689 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1690 matroska->cues_parsing_deferred = -1;
1696 matroska_add_index_entries(matroska);
1699 static int matroska_aac_profile(char *codec_id)
1701 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1704 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1705 if (strstr(codec_id, aac_profiles[profile]))
1710 static int matroska_aac_sri(int samplerate)
1714 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1715 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1720 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1722 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1723 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1726 static int matroska_parse_flac(AVFormatContext *s,
1727 MatroskaTrack *track,
1730 AVStream *st = track->stream;
1731 uint8_t *p = track->codec_priv.data;
1732 int size = track->codec_priv.size;
1734 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1735 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1736 track->codec_priv.size = 0;
1740 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1742 p += track->codec_priv.size;
1743 size -= track->codec_priv.size;
1745 /* parse the remaining metadata blocks if present */
1747 int block_last, block_type, block_size;
1749 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1753 if (block_size > size)
1756 /* check for the channel mask */
1757 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1758 AVDictionary *dict = NULL;
1759 AVDictionaryEntry *chmask;
1761 ff_vorbis_comment(s, &dict, p, block_size, 0);
1762 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1764 uint64_t mask = strtol(chmask->value, NULL, 0);
1765 if (!mask || mask & ~0x3ffffULL) {
1766 av_log(s, AV_LOG_WARNING,
1767 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1769 st->codecpar->channel_layout = mask;
1771 av_dict_free(&dict);
1781 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1783 int major, minor, micro, bttb = 0;
1785 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1786 * this function, and fixed in 57.52 */
1787 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1788 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1790 switch (field_order) {
1791 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1792 return AV_FIELD_PROGRESSIVE;
1793 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1794 return AV_FIELD_UNKNOWN;
1795 case MATROSKA_VIDEO_FIELDORDER_TT:
1797 case MATROSKA_VIDEO_FIELDORDER_BB:
1799 case MATROSKA_VIDEO_FIELDORDER_BT:
1800 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1801 case MATROSKA_VIDEO_FIELDORDER_TB:
1802 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1804 return AV_FIELD_UNKNOWN;
1808 static void mkv_stereo_mode_display_mul(int stereo_mode,
1809 int *h_width, int *h_height)
1811 switch (stereo_mode) {
1812 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1813 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1814 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1815 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1816 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1818 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1819 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1820 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1821 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1824 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1825 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1826 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1827 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1833 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1834 const MatroskaTrackVideoColor *color = track->video.color.elem;
1835 const MatroskaMasteringMeta *mastering_meta;
1836 int has_mastering_primaries, has_mastering_luminance;
1838 if (!track->video.color.nb_elem)
1841 mastering_meta = &color->mastering_meta;
1842 // Mastering primaries are CIE 1931 coords, and must be > 0.
1843 has_mastering_primaries =
1844 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1845 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1846 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1847 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1848 has_mastering_luminance = mastering_meta->max_luminance > 0;
1850 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1851 st->codecpar->color_space = color->matrix_coefficients;
1852 if (color->primaries != AVCOL_PRI_RESERVED &&
1853 color->primaries != AVCOL_PRI_RESERVED0)
1854 st->codecpar->color_primaries = color->primaries;
1855 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1856 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1857 st->codecpar->color_trc = color->transfer_characteristics;
1858 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1859 color->range <= AVCOL_RANGE_JPEG)
1860 st->codecpar->color_range = color->range;
1861 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1862 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1863 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1864 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1865 st->codecpar->chroma_location =
1866 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1867 (color->chroma_siting_vert - 1) << 7);
1870 if (has_mastering_primaries || has_mastering_luminance) {
1871 // Use similar rationals as other standards.
1872 const int chroma_den = 50000;
1873 const int luma_den = 10000;
1874 AVMasteringDisplayMetadata *metadata =
1875 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1876 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1877 sizeof(AVMasteringDisplayMetadata));
1879 return AVERROR(ENOMEM);
1881 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1882 if (has_mastering_primaries) {
1883 metadata->display_primaries[0][0] = av_make_q(
1884 round(mastering_meta->r_x * chroma_den), chroma_den);
1885 metadata->display_primaries[0][1] = av_make_q(
1886 round(mastering_meta->r_y * chroma_den), chroma_den);
1887 metadata->display_primaries[1][0] = av_make_q(
1888 round(mastering_meta->g_x * chroma_den), chroma_den);
1889 metadata->display_primaries[1][1] = av_make_q(
1890 round(mastering_meta->g_y * chroma_den), chroma_den);
1891 metadata->display_primaries[2][0] = av_make_q(
1892 round(mastering_meta->b_x * chroma_den), chroma_den);
1893 metadata->display_primaries[2][1] = av_make_q(
1894 round(mastering_meta->b_y * chroma_den), chroma_den);
1895 metadata->white_point[0] = av_make_q(
1896 round(mastering_meta->white_x * chroma_den), chroma_den);
1897 metadata->white_point[1] = av_make_q(
1898 round(mastering_meta->white_y * chroma_den), chroma_den);
1899 metadata->has_primaries = 1;
1901 if (has_mastering_luminance) {
1902 metadata->max_luminance = av_make_q(
1903 round(mastering_meta->max_luminance * luma_den), luma_den);
1904 metadata->min_luminance = av_make_q(
1905 round(mastering_meta->min_luminance * luma_den), luma_den);
1906 metadata->has_luminance = 1;
1912 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1913 AVSphericalMapping *spherical;
1914 enum AVSphericalProjection projection;
1915 size_t spherical_size;
1916 uint32_t l = 0, t = 0, r = 0, b = 0;
1917 uint32_t padding = 0;
1921 bytestream2_init(&gb, track->video.projection.private.data,
1922 track->video.projection.private.size);
1924 if (bytestream2_get_byte(&gb) != 0) {
1925 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1929 bytestream2_skip(&gb, 3); // flags
1931 switch (track->video.projection.type) {
1932 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1933 if (track->video.projection.private.size == 20) {
1934 t = bytestream2_get_be32(&gb);
1935 b = bytestream2_get_be32(&gb);
1936 l = bytestream2_get_be32(&gb);
1937 r = bytestream2_get_be32(&gb);
1939 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1940 av_log(NULL, AV_LOG_ERROR,
1941 "Invalid bounding rectangle coordinates "
1942 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1944 return AVERROR_INVALIDDATA;
1946 } else if (track->video.projection.private.size != 0) {
1947 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1948 return AVERROR_INVALIDDATA;
1951 if (l || t || r || b)
1952 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1954 projection = AV_SPHERICAL_EQUIRECTANGULAR;
1956 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
1957 if (track->video.projection.private.size < 4) {
1958 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1959 return AVERROR_INVALIDDATA;
1960 } else if (track->video.projection.private.size == 12) {
1961 uint32_t layout = bytestream2_get_be32(&gb);
1963 av_log(NULL, AV_LOG_WARNING,
1964 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1967 projection = AV_SPHERICAL_CUBEMAP;
1968 padding = bytestream2_get_be32(&gb);
1970 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1971 return AVERROR_INVALIDDATA;
1978 spherical = av_spherical_alloc(&spherical_size);
1980 return AVERROR(ENOMEM);
1981 spherical->projection = projection;
1983 spherical->yaw = (int32_t)(track->video.projection.yaw * (1 << 16));
1984 spherical->pitch = (int32_t)(track->video.projection.pitch * (1 << 16));
1985 spherical->roll = (int32_t)(track->video.projection.roll * (1 << 16));
1987 spherical->padding = padding;
1989 spherical->bound_left = l;
1990 spherical->bound_top = t;
1991 spherical->bound_right = r;
1992 spherical->bound_bottom = b;
1994 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
1997 av_freep(&spherical);
2004 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2006 const AVCodecTag *codec_tags;
2008 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2009 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2011 /* Normalize noncompliant private data that starts with the fourcc
2012 * by expanding/shifting the data by 4 bytes and storing the data
2013 * size at the start. */
2014 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2015 uint8_t *p = av_realloc(track->codec_priv.data,
2016 track->codec_priv.size + 4);
2018 return AVERROR(ENOMEM);
2019 memmove(p + 4, p, track->codec_priv.size);
2020 track->codec_priv.data = p;
2021 track->codec_priv.size += 4;
2022 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2025 *fourcc = AV_RL32(track->codec_priv.data + 4);
2026 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2031 static int matroska_parse_tracks(AVFormatContext *s)
2033 MatroskaDemuxContext *matroska = s->priv_data;
2034 MatroskaTrack *tracks = matroska->tracks.elem;
2039 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2040 MatroskaTrack *track = &tracks[i];
2041 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2042 EbmlList *encodings_list = &track->encodings;
2043 MatroskaTrackEncoding *encodings = encodings_list->elem;
2044 uint8_t *extradata = NULL;
2045 int extradata_size = 0;
2046 int extradata_offset = 0;
2047 uint32_t fourcc = 0;
2049 char* key_id_base64 = NULL;
2052 /* Apply some sanity checks. */
2053 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2054 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2055 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2056 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2057 av_log(matroska->ctx, AV_LOG_INFO,
2058 "Unknown or unsupported track type %"PRIu64"\n",
2062 if (!track->codec_id)
2065 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2066 isnan(track->audio.samplerate)) {
2067 av_log(matroska->ctx, AV_LOG_WARNING,
2068 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2069 track->audio.samplerate);
2070 track->audio.samplerate = 8000;
2073 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2074 if (!track->default_duration && track->video.frame_rate > 0)
2075 track->default_duration = 1000000000 / track->video.frame_rate;
2076 if (track->video.display_width == -1)
2077 track->video.display_width = track->video.pixel_width;
2078 if (track->video.display_height == -1)
2079 track->video.display_height = track->video.pixel_height;
2080 if (track->video.color_space.size == 4)
2081 fourcc = AV_RL32(track->video.color_space.data);
2082 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2083 if (!track->audio.out_samplerate)
2084 track->audio.out_samplerate = track->audio.samplerate;
2086 if (encodings_list->nb_elem > 1) {
2087 av_log(matroska->ctx, AV_LOG_ERROR,
2088 "Multiple combined encodings not supported");
2089 } else if (encodings_list->nb_elem == 1) {
2090 if (encodings[0].type) {
2091 if (encodings[0].encryption.key_id.size > 0) {
2092 /* Save the encryption key id to be stored later as a
2094 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2095 key_id_base64 = av_malloc(b64_size);
2096 if (key_id_base64 == NULL)
2097 return AVERROR(ENOMEM);
2099 av_base64_encode(key_id_base64, b64_size,
2100 encodings[0].encryption.key_id.data,
2101 encodings[0].encryption.key_id.size);
2103 encodings[0].scope = 0;
2104 av_log(matroska->ctx, AV_LOG_ERROR,
2105 "Unsupported encoding type");
2109 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2112 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2115 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2117 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2118 encodings[0].scope = 0;
2119 av_log(matroska->ctx, AV_LOG_ERROR,
2120 "Unsupported encoding type");
2121 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2122 uint8_t *codec_priv = track->codec_priv.data;
2123 int ret = matroska_decode_buffer(&track->codec_priv.data,
2124 &track->codec_priv.size,
2127 track->codec_priv.data = NULL;
2128 track->codec_priv.size = 0;
2129 av_log(matroska->ctx, AV_LOG_ERROR,
2130 "Failed to decode codec private data\n");
2133 if (codec_priv != track->codec_priv.data)
2134 av_free(codec_priv);
2138 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2139 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2140 strlen(ff_mkv_codec_tags[j].str))) {
2141 codec_id = ff_mkv_codec_tags[j].id;
2146 st = track->stream = avformat_new_stream(s, NULL);
2148 av_free(key_id_base64);
2149 return AVERROR(ENOMEM);
2152 if (key_id_base64) {
2153 /* export encryption key id as base64 metadata tag */
2154 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2155 av_freep(&key_id_base64);
2158 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2159 track->codec_priv.size >= 40 &&
2160 track->codec_priv.data) {
2161 track->ms_compat = 1;
2162 bit_depth = AV_RL16(track->codec_priv.data + 14);
2163 fourcc = AV_RL32(track->codec_priv.data + 16);
2164 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2167 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2169 extradata_offset = 40;
2170 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2171 track->codec_priv.size >= 14 &&
2172 track->codec_priv.data) {
2174 ffio_init_context(&b, track->codec_priv.data,
2175 track->codec_priv.size,
2176 0, NULL, NULL, NULL, NULL);
2177 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2180 codec_id = st->codecpar->codec_id;
2181 fourcc = st->codecpar->codec_tag;
2182 extradata_offset = FFMIN(track->codec_priv.size, 18);
2183 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2184 /* Normally 36, but allow noncompliant private data */
2185 && (track->codec_priv.size >= 32)
2186 && (track->codec_priv.data)) {
2187 uint16_t sample_size;
2188 int ret = get_qt_codec(track, &fourcc, &codec_id);
2191 sample_size = AV_RB16(track->codec_priv.data + 26);
2193 if (sample_size == 8) {
2194 fourcc = MKTAG('r','a','w',' ');
2195 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2196 } else if (sample_size == 16) {
2197 fourcc = MKTAG('t','w','o','s');
2198 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2201 if ((fourcc == MKTAG('t','w','o','s') ||
2202 fourcc == MKTAG('s','o','w','t')) &&
2204 codec_id = AV_CODEC_ID_PCM_S8;
2205 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2206 (track->codec_priv.size >= 21) &&
2207 (track->codec_priv.data)) {
2208 int ret = get_qt_codec(track, &fourcc, &codec_id);
2211 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2212 fourcc = MKTAG('S','V','Q','3');
2213 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2215 if (codec_id == AV_CODEC_ID_NONE) {
2217 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2218 av_log(matroska->ctx, AV_LOG_ERROR,
2219 "mov FourCC not found %s.\n", buf);
2221 if (track->codec_priv.size >= 86) {
2222 bit_depth = AV_RB16(track->codec_priv.data + 82);
2223 ffio_init_context(&b, track->codec_priv.data,
2224 track->codec_priv.size,
2225 0, NULL, NULL, NULL, NULL);
2226 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2228 track->has_palette = 1;
2231 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2232 switch (track->audio.bitdepth) {
2234 codec_id = AV_CODEC_ID_PCM_U8;
2237 codec_id = AV_CODEC_ID_PCM_S24BE;
2240 codec_id = AV_CODEC_ID_PCM_S32BE;
2243 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2244 switch (track->audio.bitdepth) {
2246 codec_id = AV_CODEC_ID_PCM_U8;
2249 codec_id = AV_CODEC_ID_PCM_S24LE;
2252 codec_id = AV_CODEC_ID_PCM_S32LE;
2255 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2256 track->audio.bitdepth == 64) {
2257 codec_id = AV_CODEC_ID_PCM_F64LE;
2258 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2259 int profile = matroska_aac_profile(track->codec_id);
2260 int sri = matroska_aac_sri(track->audio.samplerate);
2261 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2263 return AVERROR(ENOMEM);
2264 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2265 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2266 if (strstr(track->codec_id, "SBR")) {
2267 sri = matroska_aac_sri(track->audio.out_samplerate);
2268 extradata[2] = 0x56;
2269 extradata[3] = 0xE5;
2270 extradata[4] = 0x80 | (sri << 3);
2274 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2275 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2276 * Create the "atom size", "tag", and "tag version" fields the
2277 * decoder expects manually. */
2278 extradata_size = 12 + track->codec_priv.size;
2279 extradata = av_mallocz(extradata_size +
2280 AV_INPUT_BUFFER_PADDING_SIZE);
2282 return AVERROR(ENOMEM);
2283 AV_WB32(extradata, extradata_size);
2284 memcpy(&extradata[4], "alac", 4);
2285 AV_WB32(&extradata[8], 0);
2286 memcpy(&extradata[12], track->codec_priv.data,
2287 track->codec_priv.size);
2288 } else if (codec_id == AV_CODEC_ID_TTA) {
2289 extradata_size = 30;
2290 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2292 return AVERROR(ENOMEM);
2293 ffio_init_context(&b, extradata, extradata_size, 1,
2294 NULL, NULL, NULL, NULL);
2295 avio_write(&b, "TTA1", 4);
2297 if (track->audio.channels > UINT16_MAX ||
2298 track->audio.bitdepth > UINT16_MAX) {
2299 av_log(matroska->ctx, AV_LOG_WARNING,
2300 "Too large audio channel number %"PRIu64
2301 " or bitdepth %"PRIu64". Skipping track.\n",
2302 track->audio.channels, track->audio.bitdepth);
2303 av_freep(&extradata);
2304 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2305 return AVERROR_INVALIDDATA;
2309 avio_wl16(&b, track->audio.channels);
2310 avio_wl16(&b, track->audio.bitdepth);
2311 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2312 return AVERROR_INVALIDDATA;
2313 avio_wl32(&b, track->audio.out_samplerate);
2314 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2315 track->audio.out_samplerate,
2316 AV_TIME_BASE * 1000));
2317 } else if (codec_id == AV_CODEC_ID_RV10 ||
2318 codec_id == AV_CODEC_ID_RV20 ||
2319 codec_id == AV_CODEC_ID_RV30 ||
2320 codec_id == AV_CODEC_ID_RV40) {
2321 extradata_offset = 26;
2322 } else if (codec_id == AV_CODEC_ID_RA_144) {
2323 track->audio.out_samplerate = 8000;
2324 track->audio.channels = 1;
2325 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2326 codec_id == AV_CODEC_ID_COOK ||
2327 codec_id == AV_CODEC_ID_ATRAC3 ||
2328 codec_id == AV_CODEC_ID_SIPR)
2329 && track->codec_priv.data) {
2332 ffio_init_context(&b, track->codec_priv.data,
2333 track->codec_priv.size,
2334 0, NULL, NULL, NULL, NULL);
2336 flavor = avio_rb16(&b);
2337 track->audio.coded_framesize = avio_rb32(&b);
2339 track->audio.sub_packet_h = avio_rb16(&b);
2340 track->audio.frame_size = avio_rb16(&b);
2341 track->audio.sub_packet_size = avio_rb16(&b);
2343 track->audio.coded_framesize <= 0 ||
2344 track->audio.sub_packet_h <= 0 ||
2345 track->audio.frame_size <= 0 ||
2346 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2347 return AVERROR_INVALIDDATA;
2348 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2349 track->audio.frame_size);
2350 if (!track->audio.buf)
2351 return AVERROR(ENOMEM);
2352 if (codec_id == AV_CODEC_ID_RA_288) {
2353 st->codecpar->block_align = track->audio.coded_framesize;
2354 track->codec_priv.size = 0;
2356 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2357 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2358 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2359 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2361 st->codecpar->block_align = track->audio.sub_packet_size;
2362 extradata_offset = 78;
2364 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2365 ret = matroska_parse_flac(s, track, &extradata_offset);
2368 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2369 fourcc = AV_RL32(track->codec_priv.data);
2371 track->codec_priv.size -= extradata_offset;
2373 if (codec_id == AV_CODEC_ID_NONE)
2374 av_log(matroska->ctx, AV_LOG_INFO,
2375 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2377 if (track->time_scale < 0.01)
2378 track->time_scale = 1.0;
2379 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2380 1000 * 1000 * 1000); /* 64 bit pts in ns */
2382 /* convert the delay from ns to the track timebase */
2383 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2384 (AVRational){ 1, 1000000000 },
2387 st->codecpar->codec_id = codec_id;
2389 if (strcmp(track->language, "und"))
2390 av_dict_set(&st->metadata, "language", track->language, 0);
2391 av_dict_set(&st->metadata, "title", track->name, 0);
2393 if (track->flag_default)
2394 st->disposition |= AV_DISPOSITION_DEFAULT;
2395 if (track->flag_forced)
2396 st->disposition |= AV_DISPOSITION_FORCED;
2398 if (!st->codecpar->extradata) {
2400 st->codecpar->extradata = extradata;
2401 st->codecpar->extradata_size = extradata_size;
2402 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2403 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2404 return AVERROR(ENOMEM);
2405 memcpy(st->codecpar->extradata,
2406 track->codec_priv.data + extradata_offset,
2407 track->codec_priv.size);
2411 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2412 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2413 int display_width_mul = 1;
2414 int display_height_mul = 1;
2416 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2417 st->codecpar->codec_tag = fourcc;
2419 st->codecpar->bits_per_coded_sample = bit_depth;
2420 st->codecpar->width = track->video.pixel_width;
2421 st->codecpar->height = track->video.pixel_height;
2423 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2424 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2425 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2426 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2428 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2429 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2431 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2432 av_reduce(&st->sample_aspect_ratio.num,
2433 &st->sample_aspect_ratio.den,
2434 st->codecpar->height * track->video.display_width * display_width_mul,
2435 st->codecpar->width * track->video.display_height * display_height_mul,
2438 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2439 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2441 if (track->default_duration) {
2442 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2443 1000000000, track->default_duration, 30000);
2444 #if FF_API_R_FRAME_RATE
2445 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2446 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2447 st->r_frame_rate = st->avg_frame_rate;
2451 /* export stereo mode flag as metadata tag */
2452 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2453 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2455 /* export alpha mode flag as metadata tag */
2456 if (track->video.alpha_mode)
2457 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2459 /* if we have virtual track, mark the real tracks */
2460 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2462 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2464 snprintf(buf, sizeof(buf), "%s_%d",
2465 ff_matroska_video_stereo_plane[planes[j].type], i);
2466 for (k=0; k < matroska->tracks.nb_elem; k++)
2467 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2468 av_dict_set(&tracks[k].stream->metadata,
2469 "stereo_mode", buf, 0);
2473 // add stream level stereo3d side data if it is a supported format
2474 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2475 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2476 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2481 ret = mkv_parse_video_color(st, track);
2484 ret = mkv_parse_video_projection(st, track);
2487 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2488 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2489 st->codecpar->codec_tag = fourcc;
2490 st->codecpar->sample_rate = track->audio.out_samplerate;
2491 st->codecpar->channels = track->audio.channels;
2492 if (!st->codecpar->bits_per_coded_sample)
2493 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2494 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2495 st->need_parsing = AVSTREAM_PARSE_FULL;
2496 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2497 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2498 if (track->codec_delay > 0) {
2499 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2500 (AVRational){1, 1000000000},
2501 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2502 48000 : st->codecpar->sample_rate});
2504 if (track->seek_preroll > 0) {
2505 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2506 (AVRational){1, 1000000000},
2507 (AVRational){1, st->codecpar->sample_rate});
2509 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2510 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2512 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2513 st->disposition |= AV_DISPOSITION_CAPTIONS;
2514 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2515 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2516 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2517 st->disposition |= AV_DISPOSITION_METADATA;
2519 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2520 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2521 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2522 matroska->contains_ssa = 1;
2529 static int matroska_read_header(AVFormatContext *s)
2531 MatroskaDemuxContext *matroska = s->priv_data;
2532 EbmlList *attachments_list = &matroska->attachments;
2533 EbmlList *chapters_list = &matroska->chapters;
2534 MatroskaAttachment *attachments;
2535 MatroskaChapter *chapters;
2536 uint64_t max_start = 0;
2542 matroska->cues_parsing_deferred = 1;
2544 /* First read the EBML header. */
2545 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2546 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2547 ebml_free(ebml_syntax, &ebml);
2548 return AVERROR_INVALIDDATA;
2550 if (ebml.version > EBML_VERSION ||
2551 ebml.max_size > sizeof(uint64_t) ||
2552 ebml.id_length > sizeof(uint32_t) ||
2553 ebml.doctype_version > 3) {
2554 av_log(matroska->ctx, AV_LOG_ERROR,
2555 "EBML header using unsupported features\n"
2556 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2557 ebml.version, ebml.doctype, ebml.doctype_version);
2558 ebml_free(ebml_syntax, &ebml);
2559 return AVERROR_PATCHWELCOME;
2560 } else if (ebml.doctype_version == 3) {
2561 av_log(matroska->ctx, AV_LOG_WARNING,
2562 "EBML header using unsupported features\n"
2563 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2564 ebml.version, ebml.doctype, ebml.doctype_version);
2566 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2567 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2569 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2570 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2571 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2572 ebml_free(ebml_syntax, &ebml);
2573 return AVERROR_INVALIDDATA;
2576 ebml_free(ebml_syntax, &ebml);
2578 /* The next thing is a segment. */
2579 pos = avio_tell(matroska->ctx->pb);
2580 res = ebml_parse(matroska, matroska_segments, matroska);
2581 // try resyncing until we find a EBML_STOP type element.
2583 res = matroska_resync(matroska, pos);
2586 pos = avio_tell(matroska->ctx->pb);
2587 res = ebml_parse(matroska, matroska_segment, matroska);
2589 matroska_execute_seekhead(matroska);
2591 if (!matroska->time_scale)
2592 matroska->time_scale = 1000000;
2593 if (matroska->duration)
2594 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2595 1000 / AV_TIME_BASE;
2596 av_dict_set(&s->metadata, "title", matroska->title, 0);
2597 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2599 if (matroska->date_utc.size == 8)
2600 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2602 res = matroska_parse_tracks(s);
2606 attachments = attachments_list->elem;
2607 for (j = 0; j < attachments_list->nb_elem; j++) {
2608 if (!(attachments[j].filename && attachments[j].mime &&
2609 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2610 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2612 AVStream *st = avformat_new_stream(s, NULL);
2615 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2616 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2617 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2619 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2620 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2621 strlen(ff_mkv_image_mime_tags[i].str))) {
2622 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2627 attachments[j].stream = st;
2629 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2630 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2631 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2633 av_init_packet(&st->attached_pic);
2634 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2636 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2637 st->attached_pic.stream_index = st->index;
2638 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2640 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2641 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2643 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2644 attachments[j].bin.size);
2646 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2647 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2648 strlen(ff_mkv_mime_tags[i].str))) {
2649 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2657 chapters = chapters_list->elem;
2658 for (i = 0; i < chapters_list->nb_elem; i++)
2659 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2660 (max_start == 0 || chapters[i].start > max_start)) {
2661 chapters[i].chapter =
2662 avpriv_new_chapter(s, chapters[i].uid,
2663 (AVRational) { 1, 1000000000 },
2664 chapters[i].start, chapters[i].end,
2666 if (chapters[i].chapter) {
2667 av_dict_set(&chapters[i].chapter->metadata,
2668 "title", chapters[i].title, 0);
2670 max_start = chapters[i].start;
2673 matroska_add_index_entries(matroska);
2675 matroska_convert_tags(s);
2679 matroska_read_close(s);
2684 * Put one packet in an application-supplied AVPacket struct.
2685 * Returns 0 on success or -1 on failure.
2687 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2690 if (matroska->num_packets > 0) {
2691 MatroskaTrack *tracks = matroska->tracks.elem;
2692 MatroskaTrack *track;
2693 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2694 av_freep(&matroska->packets[0]);
2695 track = &tracks[pkt->stream_index];
2696 if (track->has_palette) {
2697 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2699 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2701 memcpy(pal, track->palette, AVPALETTE_SIZE);
2703 track->has_palette = 0;
2705 if (matroska->num_packets > 1) {
2707 memmove(&matroska->packets[0], &matroska->packets[1],
2708 (matroska->num_packets - 1) * sizeof(AVPacket *));
2709 newpackets = av_realloc(matroska->packets,
2710 (matroska->num_packets - 1) *
2711 sizeof(AVPacket *));
2713 matroska->packets = newpackets;
2715 av_freep(&matroska->packets);
2716 matroska->prev_pkt = NULL;
2718 matroska->num_packets--;
2726 * Free all packets in our internal queue.
2728 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2730 matroska->prev_pkt = NULL;
2731 if (matroska->packets) {
2733 for (n = 0; n < matroska->num_packets; n++) {
2734 av_packet_unref(matroska->packets[n]);
2735 av_freep(&matroska->packets[n]);
2737 av_freep(&matroska->packets);
2738 matroska->num_packets = 0;
2742 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2743 int *buf_size, int type,
2744 uint32_t **lace_buf, int *laces)
2746 int res = 0, n, size = *buf_size;
2747 uint8_t *data = *buf;
2748 uint32_t *lace_size;
2752 *lace_buf = av_mallocz(sizeof(int));
2754 return AVERROR(ENOMEM);
2756 *lace_buf[0] = size;
2760 av_assert0(size > 0);
2764 lace_size = av_mallocz(*laces * sizeof(int));
2766 return AVERROR(ENOMEM);
2769 case 0x1: /* Xiph lacing */
2773 for (n = 0; res == 0 && n < *laces - 1; n++) {
2775 if (size <= total) {
2776 res = AVERROR_INVALIDDATA;
2781 lace_size[n] += temp;
2788 if (size <= total) {
2789 res = AVERROR_INVALIDDATA;
2793 lace_size[n] = size - total;
2797 case 0x2: /* fixed-size lacing */
2798 if (size % (*laces)) {
2799 res = AVERROR_INVALIDDATA;
2802 for (n = 0; n < *laces; n++)
2803 lace_size[n] = size / *laces;
2806 case 0x3: /* EBML lacing */
2810 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2811 if (n < 0 || num > INT_MAX) {
2812 av_log(matroska->ctx, AV_LOG_INFO,
2813 "EBML block data error\n");
2814 res = n<0 ? n : AVERROR_INVALIDDATA;
2819 total = lace_size[0] = num;
2820 for (n = 1; res == 0 && n < *laces - 1; n++) {
2823 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2824 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2825 av_log(matroska->ctx, AV_LOG_INFO,
2826 "EBML block data error\n");
2827 res = r<0 ? r : AVERROR_INVALIDDATA;
2832 lace_size[n] = lace_size[n - 1] + snum;
2833 total += lace_size[n];
2835 if (size <= total) {
2836 res = AVERROR_INVALIDDATA;
2839 lace_size[*laces - 1] = size - total;
2845 *lace_buf = lace_size;
2851 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2852 MatroskaTrack *track, AVStream *st,
2853 uint8_t *data, int size, uint64_t timecode,
2856 int a = st->codecpar->block_align;
2857 int sps = track->audio.sub_packet_size;
2858 int cfs = track->audio.coded_framesize;
2859 int h = track->audio.sub_packet_h;
2860 int y = track->audio.sub_packet_cnt;
2861 int w = track->audio.frame_size;
2864 if (!track->audio.pkt_cnt) {
2865 if (track->audio.sub_packet_cnt == 0)
2866 track->audio.buf_timecode = timecode;
2867 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2868 if (size < cfs * h / 2) {
2869 av_log(matroska->ctx, AV_LOG_ERROR,
2870 "Corrupt int4 RM-style audio packet size\n");
2871 return AVERROR_INVALIDDATA;
2873 for (x = 0; x < h / 2; x++)
2874 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2875 data + x * cfs, cfs);
2876 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2878 av_log(matroska->ctx, AV_LOG_ERROR,
2879 "Corrupt sipr RM-style audio packet size\n");
2880 return AVERROR_INVALIDDATA;
2882 memcpy(track->audio.buf + y * w, data, w);
2884 if (size < sps * w / sps || h<=0 || w%sps) {
2885 av_log(matroska->ctx, AV_LOG_ERROR,
2886 "Corrupt generic RM-style audio packet size\n");
2887 return AVERROR_INVALIDDATA;
2889 for (x = 0; x < w / sps; x++)
2890 memcpy(track->audio.buf +
2891 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2892 data + x * sps, sps);
2895 if (++track->audio.sub_packet_cnt >= h) {
2896 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2897 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2898 track->audio.sub_packet_cnt = 0;
2899 track->audio.pkt_cnt = h * w / a;
2903 while (track->audio.pkt_cnt) {
2905 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2907 return AVERROR(ENOMEM);
2909 ret = av_new_packet(pkt, a);
2915 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2917 pkt->pts = track->audio.buf_timecode;
2918 track->audio.buf_timecode = AV_NOPTS_VALUE;
2920 pkt->stream_index = st->index;
2921 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2927 /* reconstruct full wavpack blocks from mangled matroska ones */
2928 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2929 uint8_t **pdst, int *size)
2931 uint8_t *dst = NULL;
2936 int ret, offset = 0;
2938 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2939 return AVERROR_INVALIDDATA;
2941 ver = AV_RL16(track->stream->codecpar->extradata);
2943 samples = AV_RL32(src);
2947 while (srclen >= 8) {
2952 uint32_t flags = AV_RL32(src);
2953 uint32_t crc = AV_RL32(src + 4);
2957 multiblock = (flags & 0x1800) != 0x1800;
2960 ret = AVERROR_INVALIDDATA;
2963 blocksize = AV_RL32(src);
2969 if (blocksize > srclen) {
2970 ret = AVERROR_INVALIDDATA;
2974 tmp = av_realloc(dst, dstlen + blocksize + 32);
2976 ret = AVERROR(ENOMEM);
2980 dstlen += blocksize + 32;
2982 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2983 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2984 AV_WL16(dst + offset + 8, ver); // version
2985 AV_WL16(dst + offset + 10, 0); // track/index_no
2986 AV_WL32(dst + offset + 12, 0); // total samples
2987 AV_WL32(dst + offset + 16, 0); // block index
2988 AV_WL32(dst + offset + 20, samples); // number of samples
2989 AV_WL32(dst + offset + 24, flags); // flags
2990 AV_WL32(dst + offset + 28, crc); // crc
2991 memcpy(dst + offset + 32, src, blocksize); // block data
2994 srclen -= blocksize;
2995 offset += blocksize + 32;
3008 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3009 MatroskaTrack *track,
3011 uint8_t *data, int data_len,
3017 uint8_t *id, *settings, *text, *buf;
3018 int id_len, settings_len, text_len;
3023 return AVERROR_INVALIDDATA;
3026 q = data + data_len;
3031 if (*p == '\r' || *p == '\n') {
3040 if (p >= q || *p != '\n')
3041 return AVERROR_INVALIDDATA;
3047 if (*p == '\r' || *p == '\n') {
3048 settings_len = p - settings;
3056 if (p >= q || *p != '\n')
3057 return AVERROR_INVALIDDATA;
3062 while (text_len > 0) {
3063 const int len = text_len - 1;
3064 const uint8_t c = p[len];
3065 if (c != '\r' && c != '\n')
3071 return AVERROR_INVALIDDATA;
3073 pkt = av_mallocz(sizeof(*pkt));
3075 return AVERROR(ENOMEM);
3076 err = av_new_packet(pkt, text_len);
3079 return AVERROR(err);
3082 memcpy(pkt->data, text, text_len);
3085 buf = av_packet_new_side_data(pkt,
3086 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3090 return AVERROR(ENOMEM);
3092 memcpy(buf, id, id_len);
3095 if (settings_len > 0) {
3096 buf = av_packet_new_side_data(pkt,
3097 AV_PKT_DATA_WEBVTT_SETTINGS,
3101 return AVERROR(ENOMEM);
3103 memcpy(buf, settings, settings_len);
3106 // Do we need this for subtitles?
3107 // pkt->flags = AV_PKT_FLAG_KEY;
3109 pkt->stream_index = st->index;
3110 pkt->pts = timecode;
3112 // Do we need this for subtitles?
3113 // pkt->dts = timecode;
3115 pkt->duration = duration;
3118 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3119 matroska->prev_pkt = pkt;
3124 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3125 MatroskaTrack *track, AVStream *st,
3126 uint8_t *data, int pkt_size,
3127 uint64_t timecode, uint64_t lace_duration,
3128 int64_t pos, int is_keyframe,
3129 uint8_t *additional, uint64_t additional_id, int additional_size,
3130 int64_t discard_padding)
3132 MatroskaTrackEncoding *encodings = track->encodings.elem;
3133 uint8_t *pkt_data = data;
3134 int offset = 0, res;
3137 if (encodings && !encodings->type && encodings->scope & 1) {
3138 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3143 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3145 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3147 av_log(matroska->ctx, AV_LOG_ERROR,
3148 "Error parsing a wavpack block.\n");
3151 if (pkt_data != data)
3152 av_freep(&pkt_data);
3156 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3157 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3160 pkt = av_mallocz(sizeof(AVPacket));
3162 if (pkt_data != data)
3163 av_freep(&pkt_data);
3164 return AVERROR(ENOMEM);
3166 /* XXX: prevent data copy... */
3167 if (av_new_packet(pkt, pkt_size + offset) < 0) {
3169 res = AVERROR(ENOMEM);
3173 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3174 uint8_t *buf = pkt->data;
3175 bytestream_put_be32(&buf, pkt_size);
3176 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3179 memcpy(pkt->data + offset, pkt_data, pkt_size);
3181 if (pkt_data != data)
3182 av_freep(&pkt_data);
3184 pkt->flags = is_keyframe;
3185 pkt->stream_index = st->index;
3187 if (additional_size > 0) {
3188 uint8_t *side_data = av_packet_new_side_data(pkt,
3189 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3190 additional_size + 8);
3192 av_packet_unref(pkt);
3194 return AVERROR(ENOMEM);
3196 AV_WB64(side_data, additional_id);
3197 memcpy(side_data + 8, additional, additional_size);
3200 if (discard_padding) {
3201 uint8_t *side_data = av_packet_new_side_data(pkt,
3202 AV_PKT_DATA_SKIP_SAMPLES,
3205 av_packet_unref(pkt);
3207 return AVERROR(ENOMEM);
3209 discard_padding = av_rescale_q(discard_padding,
3210 (AVRational){1, 1000000000},
3211 (AVRational){1, st->codecpar->sample_rate});
3212 if (discard_padding > 0) {
3213 AV_WL32(side_data + 4, discard_padding);
3215 AV_WL32(side_data, -discard_padding);
3219 if (track->ms_compat)
3220 pkt->dts = timecode;
3222 pkt->pts = timecode;
3224 pkt->duration = lace_duration;
3226 #if FF_API_CONVERGENCE_DURATION
3227 FF_DISABLE_DEPRECATION_WARNINGS
3228 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3229 pkt->convergence_duration = lace_duration;
3231 FF_ENABLE_DEPRECATION_WARNINGS
3234 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3235 matroska->prev_pkt = pkt;
3240 if (pkt_data != data)
3241 av_freep(&pkt_data);
3245 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3246 int size, int64_t pos, uint64_t cluster_time,
3247 uint64_t block_duration, int is_keyframe,
3248 uint8_t *additional, uint64_t additional_id, int additional_size,
3249 int64_t cluster_pos, int64_t discard_padding)
3251 uint64_t timecode = AV_NOPTS_VALUE;
3252 MatroskaTrack *track;
3256 uint32_t *lace_size = NULL;
3257 int n, flags, laces = 0;
3259 int trust_default_duration = 1;
3261 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3262 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3268 track = matroska_find_track_by_num(matroska, num);
3269 if (!track || !track->stream) {
3270 av_log(matroska->ctx, AV_LOG_INFO,
3271 "Invalid stream %"PRIu64" or size %u\n", num, size);
3272 return AVERROR_INVALIDDATA;
3273 } else if (size <= 3)
3276 if (st->discard >= AVDISCARD_ALL)
3278 av_assert1(block_duration != AV_NOPTS_VALUE);
3280 block_time = sign_extend(AV_RB16(data), 16);
3284 if (is_keyframe == -1)
3285 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3287 if (cluster_time != (uint64_t) -1 &&
3288 (block_time >= 0 || cluster_time >= -block_time)) {
3289 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3290 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3291 timecode < track->end_timecode)
3292 is_keyframe = 0; /* overlapping subtitles are not key frame */
3294 ff_reduce_index(matroska->ctx, st->index);
3295 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3300 if (matroska->skip_to_keyframe &&
3301 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3302 // Compare signed timecodes. Timecode may be negative due to codec delay
3303 // offset. We don't support timestamps greater than int64_t anyway - see
3305 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3308 matroska->skip_to_keyframe = 0;
3309 else if (!st->skip_to_keyframe) {
3310 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3311 matroska->skip_to_keyframe = 0;
3315 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3316 &lace_size, &laces);
3321 if (track->audio.samplerate == 8000) {
3322 // If this is needed for more codecs, then add them here
3323 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3324 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3325 trust_default_duration = 0;
3329 if (!block_duration && trust_default_duration)
3330 block_duration = track->default_duration * laces / matroska->time_scale;
3332 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3333 track->end_timecode =
3334 FFMAX(track->end_timecode, timecode + block_duration);
3336 for (n = 0; n < laces; n++) {
3337 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3339 if (lace_size[n] > size) {
3340 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3344 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3345 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3346 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3347 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3348 st->codecpar->block_align && track->audio.sub_packet_size) {
3349 res = matroska_parse_rm_audio(matroska, track, st, data,
3355 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3356 res = matroska_parse_webvtt(matroska, track, st,
3358 timecode, lace_duration,
3363 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3364 timecode, lace_duration, pos,
3365 !n ? is_keyframe : 0,
3366 additional, additional_id, additional_size,
3372 if (timecode != AV_NOPTS_VALUE)
3373 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3374 data += lace_size[n];
3375 size -= lace_size[n];
3383 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3385 EbmlList *blocks_list;
3386 MatroskaBlock *blocks;
3388 res = ebml_parse(matroska,
3389 matroska_cluster_incremental_parsing,
3390 &matroska->current_cluster);
3393 if (matroska->current_cluster_pos)
3394 ebml_level_end(matroska);
3395 ebml_free(matroska_cluster, &matroska->current_cluster);
3396 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3397 matroska->current_cluster_num_blocks = 0;
3398 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3399 matroska->prev_pkt = NULL;
3400 /* sizeof the ID which was already read */
3401 if (matroska->current_id)
3402 matroska->current_cluster_pos -= 4;
3403 res = ebml_parse(matroska,
3404 matroska_clusters_incremental,
3405 &matroska->current_cluster);
3406 /* Try parsing the block again. */
3408 res = ebml_parse(matroska,
3409 matroska_cluster_incremental_parsing,
3410 &matroska->current_cluster);
3414 matroska->current_cluster_num_blocks <
3415 matroska->current_cluster.blocks.nb_elem) {
3416 blocks_list = &matroska->current_cluster.blocks;
3417 blocks = blocks_list->elem;
3419 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3420 i = blocks_list->nb_elem - 1;
3421 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3422 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3423 uint8_t* additional = blocks[i].additional.size > 0 ?
3424 blocks[i].additional.data : NULL;
3425 if (!blocks[i].non_simple)
3426 blocks[i].duration = 0;
3427 res = matroska_parse_block(matroska, blocks[i].bin.data,
3428 blocks[i].bin.size, blocks[i].bin.pos,
3429 matroska->current_cluster.timecode,
3430 blocks[i].duration, is_keyframe,
3431 additional, blocks[i].additional_id,
3432 blocks[i].additional.size,
3433 matroska->current_cluster_pos,
3434 blocks[i].discard_padding);
3441 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3443 MatroskaCluster cluster = { 0 };
3444 EbmlList *blocks_list;
3445 MatroskaBlock *blocks;
3449 if (!matroska->contains_ssa)
3450 return matroska_parse_cluster_incremental(matroska);
3451 pos = avio_tell(matroska->ctx->pb);
3452 matroska->prev_pkt = NULL;
3453 if (matroska->current_id)
3454 pos -= 4; /* sizeof the ID which was already read */
3455 res = ebml_parse(matroska, matroska_clusters, &cluster);
3456 blocks_list = &cluster.blocks;
3457 blocks = blocks_list->elem;
3458 for (i = 0; i < blocks_list->nb_elem; i++)
3459 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3460 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3461 res = matroska_parse_block(matroska, blocks[i].bin.data,
3462 blocks[i].bin.size, blocks[i].bin.pos,
3463 cluster.timecode, blocks[i].duration,
3464 is_keyframe, NULL, 0, 0, pos,
3465 blocks[i].discard_padding);
3467 ebml_free(matroska_cluster, &cluster);
3471 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3473 MatroskaDemuxContext *matroska = s->priv_data;
3476 while (matroska_deliver_packet(matroska, pkt)) {
3477 int64_t pos = avio_tell(matroska->ctx->pb);
3479 return (ret < 0) ? ret : AVERROR_EOF;
3480 if (matroska_parse_cluster(matroska) < 0)
3481 ret = matroska_resync(matroska, pos);
3487 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3488 int64_t timestamp, int flags)
3490 MatroskaDemuxContext *matroska = s->priv_data;
3491 MatroskaTrack *tracks = NULL;
3492 AVStream *st = s->streams[stream_index];
3493 int i, index, index_min;
3495 /* Parse the CUES now since we need the index data to seek. */
3496 if (matroska->cues_parsing_deferred > 0) {
3497 matroska->cues_parsing_deferred = 0;
3498 matroska_parse_cues(matroska);
3501 if (!st->nb_index_entries)
3503 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3505 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3506 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3508 matroska->current_id = 0;
3509 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3510 matroska_clear_queue(matroska);
3511 if (matroska_parse_cluster(matroska) < 0)
3516 matroska_clear_queue(matroska);
3517 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3521 tracks = matroska->tracks.elem;
3522 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3523 tracks[i].audio.pkt_cnt = 0;
3524 tracks[i].audio.sub_packet_cnt = 0;
3525 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3526 tracks[i].end_timecode = 0;
3529 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3530 matroska->current_id = 0;
3531 if (flags & AVSEEK_FLAG_ANY) {
3532 st->skip_to_keyframe = 0;
3533 matroska->skip_to_timecode = timestamp;
3535 st->skip_to_keyframe = 1;
3536 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3538 matroska->skip_to_keyframe = 1;
3540 matroska->num_levels = 0;
3541 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3544 // slightly hackish but allows proper fallback to
3545 // the generic seeking code.
3546 matroska_clear_queue(matroska);
3547 matroska->current_id = 0;
3548 st->skip_to_keyframe =
3549 matroska->skip_to_keyframe = 0;
3551 matroska->num_levels = 0;
3555 static int matroska_read_close(AVFormatContext *s)
3557 MatroskaDemuxContext *matroska = s->priv_data;
3558 MatroskaTrack *tracks = matroska->tracks.elem;
3561 matroska_clear_queue(matroska);
3563 for (n = 0; n < matroska->tracks.nb_elem; n++)
3564 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3565 av_freep(&tracks[n].audio.buf);
3566 ebml_free(matroska_cluster, &matroska->current_cluster);
3567 ebml_free(matroska_segment, matroska);
3573 int64_t start_time_ns;
3574 int64_t end_time_ns;
3575 int64_t start_offset;
3579 /* This function searches all the Cues and returns the CueDesc corresponding the
3580 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3581 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3583 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3584 MatroskaDemuxContext *matroska = s->priv_data;
3587 int nb_index_entries = s->streams[0]->nb_index_entries;
3588 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3589 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3590 for (i = 1; i < nb_index_entries; i++) {
3591 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3592 index_entries[i].timestamp * matroska->time_scale > ts) {
3597 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3598 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3599 if (i != nb_index_entries - 1) {
3600 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3601 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3603 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3604 // FIXME: this needs special handling for files where Cues appear
3605 // before Clusters. the current logic assumes Cues appear after
3607 cue_desc.end_offset = cues_start - matroska->segment_start;
3612 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3614 MatroskaDemuxContext *matroska = s->priv_data;
3615 int64_t cluster_pos, before_pos;
3617 if (s->streams[0]->nb_index_entries <= 0) return 0;
3618 // seek to the first cluster using cues.
3619 index = av_index_search_timestamp(s->streams[0], 0, 0);
3620 if (index < 0) return 0;
3621 cluster_pos = s->streams[0]->index_entries[index].pos;
3622 before_pos = avio_tell(s->pb);
3624 int64_t cluster_id = 0, cluster_length = 0;
3626 avio_seek(s->pb, cluster_pos, SEEK_SET);
3627 // read cluster id and length
3628 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3629 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3630 if (cluster_id != 0xF43B675) { // done with all clusters
3633 avio_seek(s->pb, cluster_pos, SEEK_SET);
3634 matroska->current_id = 0;
3635 matroska_clear_queue(matroska);
3636 if (matroska_parse_cluster(matroska) < 0 ||
3637 matroska->num_packets <= 0) {
3640 pkt = matroska->packets[0];
3641 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3642 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3647 avio_seek(s->pb, before_pos, SEEK_SET);
3651 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3652 double min_buffer, double* buffer,
3653 double* sec_to_download, AVFormatContext *s,
3656 double nano_seconds_per_second = 1000000000.0;
3657 double time_sec = time_ns / nano_seconds_per_second;
3659 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3660 int64_t end_time_ns = time_ns + time_to_search_ns;
3661 double sec_downloaded = 0.0;
3662 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3663 if (desc_curr.start_time_ns == -1)
3665 *sec_to_download = 0.0;
3667 // Check for non cue start time.
3668 if (time_ns > desc_curr.start_time_ns) {
3669 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3670 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3671 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3672 double timeToDownload = (cueBytes * 8.0) / bps;
3674 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3675 *sec_to_download += timeToDownload;
3677 // Check if the search ends within the first cue.
3678 if (desc_curr.end_time_ns >= end_time_ns) {
3679 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3680 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3681 sec_downloaded = percent_to_sub * sec_downloaded;
3682 *sec_to_download = percent_to_sub * *sec_to_download;
3685 if ((sec_downloaded + *buffer) <= min_buffer) {
3689 // Get the next Cue.
3690 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3693 while (desc_curr.start_time_ns != -1) {
3694 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3695 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3696 double desc_sec = desc_ns / nano_seconds_per_second;
3697 double bits = (desc_bytes * 8.0);
3698 double time_to_download = bits / bps;
3700 sec_downloaded += desc_sec - time_to_download;
3701 *sec_to_download += time_to_download;
3703 if (desc_curr.end_time_ns >= end_time_ns) {
3704 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3705 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3706 sec_downloaded = percent_to_sub * sec_downloaded;
3707 *sec_to_download = percent_to_sub * *sec_to_download;
3709 if ((sec_downloaded + *buffer) <= min_buffer)
3714 if ((sec_downloaded + *buffer) <= min_buffer) {
3719 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3721 *buffer = *buffer + sec_downloaded;
3725 /* This function computes the bandwidth of the WebM file with the help of
3726 * buffer_size_after_time_downloaded() function. Both of these functions are
3727 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3728 * Matroska parsing mechanism.
3730 * Returns the bandwidth of the file on success; -1 on error.
3732 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3734 MatroskaDemuxContext *matroska = s->priv_data;
3735 AVStream *st = s->streams[0];
3736 double bandwidth = 0.0;
3739 for (i = 0; i < st->nb_index_entries; i++) {
3740 int64_t prebuffer_ns = 1000000000;
3741 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3742 double nano_seconds_per_second = 1000000000.0;
3743 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3744 double prebuffer_bytes = 0.0;
3745 int64_t temp_prebuffer_ns = prebuffer_ns;
3746 int64_t pre_bytes, pre_ns;
3747 double pre_sec, prebuffer, bits_per_second;
3748 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3750 // Start with the first Cue.
3751 CueDesc desc_end = desc_beg;
3753 // Figure out how much data we have downloaded for the prebuffer. This will
3754 // be used later to adjust the bits per sample to try.
3755 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3756 // Prebuffered the entire Cue.
3757 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3758 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3759 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3761 if (desc_end.start_time_ns == -1) {
3762 // The prebuffer is larger than the duration.
3763 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3765 bits_per_second = 0.0;
3767 // The prebuffer ends in the last Cue. Estimate how much data was
3769 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3770 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3771 pre_sec = pre_ns / nano_seconds_per_second;
3773 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3775 prebuffer = prebuffer_ns / nano_seconds_per_second;
3777 // Set this to 0.0 in case our prebuffer buffers the entire video.
3778 bits_per_second = 0.0;
3780 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3781 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3782 double desc_sec = desc_ns / nano_seconds_per_second;
3783 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3785 // Drop the bps by the percentage of bytes buffered.
3786 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3787 double mod_bits_per_second = calc_bits_per_second * percent;
3789 if (prebuffer < desc_sec) {
3791 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3793 // Add 1 so the bits per second should be a little bit greater than file
3795 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3796 const double min_buffer = 0.0;
3797 double buffer = prebuffer;
3798 double sec_to_download = 0.0;
3800 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3801 min_buffer, &buffer, &sec_to_download,
3805 } else if (rv == 0) {
3806 bits_per_second = (double)(bps);
3811 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3812 } while (desc_end.start_time_ns != -1);
3814 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3816 return (int64_t)bandwidth;
3819 static int webm_dash_manifest_cues(AVFormatContext *s)
3821 MatroskaDemuxContext *matroska = s->priv_data;
3822 EbmlList *seekhead_list = &matroska->seekhead;
3823 MatroskaSeekhead *seekhead = seekhead_list->elem;
3825 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3828 // determine cues start and end positions
3829 for (i = 0; i < seekhead_list->nb_elem; i++)
3830 if (seekhead[i].id == MATROSKA_ID_CUES)
3833 if (i >= seekhead_list->nb_elem) return -1;
3835 before_pos = avio_tell(matroska->ctx->pb);
3836 cues_start = seekhead[i].pos + matroska->segment_start;
3837 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3838 // cues_end is computed as cues_start + cues_length + length of the
3839 // Cues element ID + EBML length of the Cues element. cues_end is
3840 // inclusive and the above sum is reduced by 1.
3841 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3842 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3843 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3844 cues_end = cues_start + cues_length + bytes_read - 1;
3846 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3847 if (cues_start == -1 || cues_end == -1) return -1;
3850 matroska_parse_cues(matroska);
3853 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3856 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3859 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3860 if (bandwidth < 0) return -1;
3861 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3863 // check if all clusters start with key frames
3864 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3866 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3867 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3868 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3869 if (!buf) return -1;
3871 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3872 snprintf(buf, (i + 1) * 20 * sizeof(char),
3873 "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3874 if (i != s->streams[0]->nb_index_entries - 1)
3875 strncat(buf, ",", sizeof(char));
3877 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3883 static int webm_dash_manifest_read_header(AVFormatContext *s)
3886 int ret = matroska_read_header(s);
3887 MatroskaTrack *tracks;
3888 MatroskaDemuxContext *matroska = s->priv_data;
3890 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3893 if (!s->nb_streams) {
3894 matroska_read_close(s);
3895 av_log(s, AV_LOG_ERROR, "No streams found\n");
3896 return AVERROR_INVALIDDATA;
3899 if (!matroska->is_live) {
3900 buf = av_asprintf("%g", matroska->duration);
3901 if (!buf) return AVERROR(ENOMEM);
3902 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3905 // initialization range
3906 // 5 is the offset of Cluster ID.
3907 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3910 // basename of the file
3911 buf = strrchr(s->filename, '/');
3912 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3915 tracks = matroska->tracks.elem;
3916 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3918 // parse the cues and populate Cue related fields
3919 return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3922 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3927 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3928 static const AVOption options[] = {
3929 { "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 },
3933 static const AVClass webm_dash_class = {
3934 .class_name = "WebM DASH Manifest demuxer",
3935 .item_name = av_default_item_name,
3937 .version = LIBAVUTIL_VERSION_INT,
3940 AVInputFormat ff_matroska_demuxer = {
3941 .name = "matroska,webm",
3942 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3943 .extensions = "mkv,mk3d,mka,mks",
3944 .priv_data_size = sizeof(MatroskaDemuxContext),
3945 .read_probe = matroska_probe,
3946 .read_header = matroska_read_header,
3947 .read_packet = matroska_read_packet,
3948 .read_close = matroska_read_close,
3949 .read_seek = matroska_read_seek,
3950 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3953 AVInputFormat ff_webm_dash_manifest_demuxer = {
3954 .name = "webm_dash_manifest",
3955 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3956 .priv_data_size = sizeof(MatroskaDemuxContext),
3957 .read_header = webm_dash_manifest_read_header,
3958 .read_packet = webm_dash_manifest_read_packet,
3959 .read_close = matroska_read_close,
3960 .priv_class = &webm_dash_class,