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"
47 #include "libavcodec/bytestream.h"
48 #include "libavcodec/flac.h"
49 #include "libavcodec/mpeg4audio.h"
52 #include "avio_internal.h"
57 /* For ff_codec_get_id(). */
68 #include "qtpalette.h"
85 typedef const struct EbmlSyntax {
94 const struct EbmlSyntax *n;
98 typedef struct EbmlList {
103 typedef struct EbmlBin {
109 typedef struct Ebml {
114 uint64_t doctype_version;
117 typedef struct MatroskaTrackCompression {
120 } MatroskaTrackCompression;
122 typedef struct MatroskaTrackEncryption {
125 } MatroskaTrackEncryption;
127 typedef struct MatroskaTrackEncoding {
130 MatroskaTrackCompression compression;
131 MatroskaTrackEncryption encryption;
132 } MatroskaTrackEncoding;
134 typedef struct MatroskaMasteringMeta {
143 double max_luminance;
144 double min_luminance;
145 } MatroskaMasteringMeta;
147 typedef struct MatroskaTrackVideoColor {
148 uint64_t matrix_coefficients;
149 uint64_t bits_per_channel;
150 uint64_t chroma_sub_horz;
151 uint64_t chroma_sub_vert;
152 uint64_t cb_sub_horz;
153 uint64_t cb_sub_vert;
154 uint64_t chroma_siting_horz;
155 uint64_t chroma_siting_vert;
157 uint64_t transfer_characteristics;
161 MatroskaMasteringMeta mastering_meta;
162 } MatroskaTrackVideoColor;
164 typedef struct MatroskaTrackVideo {
166 uint64_t display_width;
167 uint64_t display_height;
168 uint64_t pixel_width;
169 uint64_t pixel_height;
172 uint64_t field_order;
173 uint64_t stereo_mode;
175 MatroskaTrackVideoColor color;
176 } MatroskaTrackVideo;
178 typedef struct MatroskaTrackAudio {
180 double out_samplerate;
184 /* real audio header (extracted from extradata) */
191 uint64_t buf_timecode;
193 } MatroskaTrackAudio;
195 typedef struct MatroskaTrackPlane {
198 } MatroskaTrackPlane;
200 typedef struct MatroskaTrackOperation {
201 EbmlList combine_planes;
202 } MatroskaTrackOperation;
204 typedef struct MatroskaTrack {
213 uint64_t default_duration;
214 uint64_t flag_default;
215 uint64_t flag_forced;
216 uint64_t seek_preroll;
217 MatroskaTrackVideo video;
218 MatroskaTrackAudio audio;
219 MatroskaTrackOperation operation;
221 uint64_t codec_delay;
222 uint64_t codec_delay_in_track_tb;
225 int64_t end_timecode;
227 uint64_t max_block_additional_id;
229 uint32_t palette[AVPALETTE_COUNT];
233 typedef struct MatroskaAttachment {
240 } MatroskaAttachment;
242 typedef struct MatroskaChapter {
251 typedef struct MatroskaIndexPos {
256 typedef struct MatroskaIndex {
261 typedef struct MatroskaTag {
269 typedef struct MatroskaTagTarget {
277 typedef struct MatroskaTags {
278 MatroskaTagTarget target;
282 typedef struct MatroskaSeekhead {
287 typedef struct MatroskaLevel {
292 typedef struct MatroskaCluster {
297 typedef struct MatroskaLevel1Element {
301 } MatroskaLevel1Element;
303 typedef struct MatroskaDemuxContext {
304 const AVClass *class;
305 AVFormatContext *ctx;
309 MatroskaLevel levels[EBML_MAX_DEPTH];
319 EbmlList attachments;
325 /* byte position of the segment inside the stream */
326 int64_t segment_start;
328 /* the packet queue */
335 /* What to skip before effectively reading a packet. */
336 int skip_to_keyframe;
337 uint64_t skip_to_timecode;
339 /* File has a CUES element, but we defer parsing until it is needed. */
340 int cues_parsing_deferred;
342 /* Level1 elements and whether they were read yet */
343 MatroskaLevel1Element level1_elems[64];
344 int num_level1_elems;
346 int current_cluster_num_blocks;
347 int64_t current_cluster_pos;
348 MatroskaCluster current_cluster;
350 /* File has SSA subtitles which prevent incremental cluster parsing. */
353 /* WebM DASH Manifest live flag/ */
355 } MatroskaDemuxContext;
357 typedef struct MatroskaBlock {
362 uint64_t additional_id;
364 int64_t discard_padding;
367 static const EbmlSyntax ebml_header[] = {
368 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
369 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
370 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
371 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
372 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
373 { EBML_ID_EBMLVERSION, EBML_NONE },
374 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
378 static const EbmlSyntax ebml_syntax[] = {
379 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
383 static const EbmlSyntax matroska_info[] = {
384 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
385 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
386 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
387 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
388 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
389 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
390 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
394 static const EbmlSyntax matroska_mastering_meta[] = {
395 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
396 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
397 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
398 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
399 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
400 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
401 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
402 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
403 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
404 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
408 static const EbmlSyntax matroska_track_video_color[] = {
409 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u=2 } },
410 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=8 } },
411 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
412 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
413 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
414 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
415 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u=0 } },
416 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u=0 } },
417 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u=0 } },
418 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u=2 } },
419 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u=2 } },
420 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
421 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
422 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
426 static const EbmlSyntax matroska_track_video[] = {
427 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
428 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
429 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
430 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
431 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
432 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
433 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
434 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
435 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
436 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
437 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
438 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
439 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
440 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
441 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
442 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
443 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
447 static const EbmlSyntax matroska_track_audio[] = {
448 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
449 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
450 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
451 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
455 static const EbmlSyntax matroska_track_encoding_compression[] = {
456 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
457 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
461 static const EbmlSyntax matroska_track_encoding_encryption[] = {
462 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
463 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
464 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
465 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
466 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
467 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
468 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
471 static const EbmlSyntax matroska_track_encoding[] = {
472 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
473 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
474 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
475 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
476 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
480 static const EbmlSyntax matroska_track_encodings[] = {
481 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
485 static const EbmlSyntax matroska_track_plane[] = {
486 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
487 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
491 static const EbmlSyntax matroska_track_combine_planes[] = {
492 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
496 static const EbmlSyntax matroska_track_operation[] = {
497 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
501 static const EbmlSyntax matroska_track[] = {
502 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
503 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
504 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
505 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
506 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
507 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
508 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
509 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
510 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
511 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
512 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
513 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
514 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
515 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
516 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
517 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
518 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
519 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
520 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
521 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
522 { MATROSKA_ID_CODECNAME, EBML_NONE },
523 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
524 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
525 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
526 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
527 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
531 static const EbmlSyntax matroska_tracks[] = {
532 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
536 static const EbmlSyntax matroska_attachment[] = {
537 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
538 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
539 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
540 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
541 { MATROSKA_ID_FILEDESC, EBML_NONE },
545 static const EbmlSyntax matroska_attachments[] = {
546 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
550 static const EbmlSyntax matroska_chapter_display[] = {
551 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
552 { MATROSKA_ID_CHAPLANG, EBML_NONE },
553 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
557 static const EbmlSyntax matroska_chapter_entry[] = {
558 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
559 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
560 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
561 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
562 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
563 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
564 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
565 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
569 static const EbmlSyntax matroska_chapter[] = {
570 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
571 { MATROSKA_ID_EDITIONUID, EBML_NONE },
572 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
573 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
574 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
578 static const EbmlSyntax matroska_chapters[] = {
579 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
583 static const EbmlSyntax matroska_index_pos[] = {
584 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
585 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
586 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
587 { MATROSKA_ID_CUEDURATION, EBML_NONE },
588 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
592 static const EbmlSyntax matroska_index_entry[] = {
593 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
594 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
598 static const EbmlSyntax matroska_index[] = {
599 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
603 static const EbmlSyntax matroska_simpletag[] = {
604 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
605 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
606 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
607 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
608 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
609 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
613 static const EbmlSyntax matroska_tagtargets[] = {
614 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
615 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
616 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
617 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
618 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
622 static const EbmlSyntax matroska_tag[] = {
623 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
624 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
628 static const EbmlSyntax matroska_tags[] = {
629 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
633 static const EbmlSyntax matroska_seekhead_entry[] = {
634 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
635 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
639 static const EbmlSyntax matroska_seekhead[] = {
640 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
644 static const EbmlSyntax matroska_segment[] = {
645 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
646 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
647 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
648 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
649 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
650 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
651 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
652 { MATROSKA_ID_CLUSTER, EBML_STOP },
656 static const EbmlSyntax matroska_segments[] = {
657 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
661 static const EbmlSyntax matroska_blockmore[] = {
662 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
663 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
667 static const EbmlSyntax matroska_blockadditions[] = {
668 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
672 static const EbmlSyntax matroska_blockgroup[] = {
673 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
674 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
675 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
676 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
677 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
678 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
679 { MATROSKA_ID_CODECSTATE, EBML_NONE },
680 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
684 static const EbmlSyntax matroska_cluster[] = {
685 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
686 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
687 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
688 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
689 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
693 static const EbmlSyntax matroska_clusters[] = {
694 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
695 { MATROSKA_ID_INFO, EBML_NONE },
696 { MATROSKA_ID_CUES, EBML_NONE },
697 { MATROSKA_ID_TAGS, EBML_NONE },
698 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
702 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
703 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
704 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
705 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
706 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
707 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
708 { MATROSKA_ID_INFO, EBML_NONE },
709 { MATROSKA_ID_CUES, EBML_NONE },
710 { MATROSKA_ID_TAGS, EBML_NONE },
711 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
712 { MATROSKA_ID_CLUSTER, EBML_STOP },
716 static const EbmlSyntax matroska_cluster_incremental[] = {
717 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
718 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
719 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
720 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
721 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
725 static const EbmlSyntax matroska_clusters_incremental[] = {
726 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
727 { MATROSKA_ID_INFO, EBML_NONE },
728 { MATROSKA_ID_CUES, EBML_NONE },
729 { MATROSKA_ID_TAGS, EBML_NONE },
730 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
734 static const char *const matroska_doctypes[] = { "matroska", "webm" };
736 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
738 AVIOContext *pb = matroska->ctx->pb;
740 matroska->current_id = 0;
741 matroska->num_levels = 0;
743 /* seek to next position to resync from */
744 if (avio_seek(pb, last_pos + 1, SEEK_SET) < 0)
749 // try to find a toplevel element
750 while (!avio_feof(pb)) {
751 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
752 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
753 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
754 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
755 matroska->current_id = id;
758 id = (id << 8) | avio_r8(pb);
767 * Return: Whether we reached the end of a level in the hierarchy or not.
769 static int ebml_level_end(MatroskaDemuxContext *matroska)
771 AVIOContext *pb = matroska->ctx->pb;
772 int64_t pos = avio_tell(pb);
774 if (matroska->num_levels > 0) {
775 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
776 if (pos - level->start >= level->length || matroska->current_id) {
777 matroska->num_levels--;
781 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
785 * Read: an "EBML number", which is defined as a variable-length
786 * array of bytes. The first byte indicates the length by giving a
787 * number of 0-bits followed by a one. The position of the first
788 * "one" bit inside the first byte indicates the length of this
790 * Returns: number of bytes read, < 0 on error
792 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
793 int max_size, uint64_t *number)
798 /* The first byte tells us the length in bytes - avio_r8() can normally
799 * return 0, but since that's not a valid first ebmlID byte, we can
800 * use it safely here to catch EOS. */
801 if (!(total = avio_r8(pb))) {
802 /* we might encounter EOS here */
803 if (!avio_feof(pb)) {
804 int64_t pos = avio_tell(pb);
805 av_log(matroska->ctx, AV_LOG_ERROR,
806 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
808 return pb->error ? pb->error : AVERROR(EIO);
813 /* get the length of the EBML number */
814 read = 8 - ff_log2_tab[total];
815 if (read > max_size) {
816 int64_t pos = avio_tell(pb) - 1;
817 av_log(matroska->ctx, AV_LOG_ERROR,
818 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
819 (uint8_t) total, pos, pos);
820 return AVERROR_INVALIDDATA;
823 /* read out length */
824 total ^= 1 << ff_log2_tab[total];
826 total = (total << 8) | avio_r8(pb);
834 * Read a EBML length value.
835 * This needs special handling for the "unknown length" case which has multiple
838 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
841 int res = ebml_read_num(matroska, pb, 8, number);
842 if (res > 0 && *number + 1 == 1ULL << (7 * res))
843 *number = 0xffffffffffffffULL;
848 * Read the next element as an unsigned int.
849 * 0 is success, < 0 is failure.
851 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
856 return AVERROR_INVALIDDATA;
858 /* big-endian ordering; build up number */
861 *num = (*num << 8) | avio_r8(pb);
867 * Read the next element as a signed int.
868 * 0 is success, < 0 is failure.
870 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
875 return AVERROR_INVALIDDATA;
880 *num = sign_extend(avio_r8(pb), 8);
882 /* big-endian ordering; build up number */
884 *num = ((uint64_t)*num << 8) | avio_r8(pb);
891 * Read the next element as a float.
892 * 0 is success, < 0 is failure.
894 static int ebml_read_float(AVIOContext *pb, int size, double *num)
899 *num = av_int2float(avio_rb32(pb));
901 *num = av_int2double(avio_rb64(pb));
903 return AVERROR_INVALIDDATA;
909 * Read the next element as an ASCII string.
910 * 0 is success, < 0 is failure.
912 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
916 /* EBML strings are usually not 0-terminated, so we allocate one
917 * byte more, read the string and NULL-terminate it ourselves. */
918 if (!(res = av_malloc(size + 1)))
919 return AVERROR(ENOMEM);
920 if (avio_read(pb, (uint8_t *) res, size) != size) {
932 * Read the next element as binary data.
933 * 0 is success, < 0 is failure.
935 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
937 av_fast_padded_malloc(&bin->data, &bin->size, length);
939 return AVERROR(ENOMEM);
942 bin->pos = avio_tell(pb);
943 if (avio_read(pb, bin->data, length) != length) {
944 av_freep(&bin->data);
953 * Read the next element, but only the header. The contents
954 * are supposed to be sub-elements which can be read separately.
955 * 0 is success, < 0 is failure.
957 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
959 AVIOContext *pb = matroska->ctx->pb;
960 MatroskaLevel *level;
962 if (matroska->num_levels >= EBML_MAX_DEPTH) {
963 av_log(matroska->ctx, AV_LOG_ERROR,
964 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
965 return AVERROR(ENOSYS);
968 level = &matroska->levels[matroska->num_levels++];
969 level->start = avio_tell(pb);
970 level->length = length;
976 * Read signed/unsigned "EBML" numbers.
977 * Return: number of bytes processed, < 0 on error
979 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
980 uint8_t *data, uint32_t size, uint64_t *num)
983 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
984 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
988 * Same as above, but signed.
990 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
991 uint8_t *data, uint32_t size, int64_t *num)
996 /* read as unsigned number first */
997 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1000 /* make signed (weird way) */
1001 *num = unum - ((1LL << (7 * res - 1)) - 1);
1006 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1007 EbmlSyntax *syntax, void *data);
1009 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1010 uint32_t id, void *data)
1013 for (i = 0; syntax[i].id; i++)
1014 if (id == syntax[i].id)
1016 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1017 matroska->num_levels > 0 &&
1018 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1019 return 0; // we reached the end of an unknown size cluster
1020 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1021 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1023 return ebml_parse_elem(matroska, &syntax[i], data);
1026 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1029 if (!matroska->current_id) {
1031 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1033 // in live mode, finish parsing if EOF is reached.
1034 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1035 res == AVERROR_EOF) ? 1 : res;
1037 matroska->current_id = id | 1 << 7 * res;
1039 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1042 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1047 for (i = 0; syntax[i].id; i++)
1048 switch (syntax[i].type) {
1050 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1053 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1057 // the default may be NULL
1058 if (syntax[i].def.s) {
1059 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1060 *dst = av_strdup(syntax[i].def.s);
1062 return AVERROR(ENOMEM);
1067 while (!res && !ebml_level_end(matroska))
1068 res = ebml_parse(matroska, syntax, data);
1073 static int is_ebml_id_valid(uint32_t id)
1075 // Due to endian nonsense in Matroska, the highest byte with any bits set
1076 // will contain the leading length bit. This bit in turn identifies the
1077 // total byte length of the element by its position within the byte.
1078 unsigned int bits = av_log2(id);
1079 return id && (bits + 7) / 8 == (8 - bits % 8);
1083 * Allocate and return the entry for the level1 element with the given ID. If
1084 * an entry already exists, return the existing entry.
1086 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1090 MatroskaLevel1Element *elem;
1092 if (!is_ebml_id_valid(id))
1095 // Some files link to all clusters; useless.
1096 if (id == MATROSKA_ID_CLUSTER)
1099 // There can be multiple seekheads.
1100 if (id != MATROSKA_ID_SEEKHEAD) {
1101 for (i = 0; i < matroska->num_level1_elems; i++) {
1102 if (matroska->level1_elems[i].id == id)
1103 return &matroska->level1_elems[i];
1107 // Only a completely broken file would have more elements.
1108 // It also provides a low-effort way to escape from circular seekheads
1109 // (every iteration will add a level1 entry).
1110 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1111 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1115 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1116 *elem = (MatroskaLevel1Element){.id = id};
1121 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1122 EbmlSyntax *syntax, void *data)
1124 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1127 // max. 16 MB for strings
1128 [EBML_STR] = 0x1000000,
1129 [EBML_UTF8] = 0x1000000,
1130 // max. 256 MB for binary data
1131 [EBML_BIN] = 0x10000000,
1132 // no limits for anything else
1134 AVIOContext *pb = matroska->ctx->pb;
1135 uint32_t id = syntax->id;
1139 MatroskaLevel1Element *level1_elem;
1141 data = (char *) data + syntax->data_offset;
1142 if (syntax->list_elem_size) {
1143 EbmlList *list = data;
1144 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1146 return AVERROR(ENOMEM);
1147 list->elem = newelem;
1148 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1149 memset(data, 0, syntax->list_elem_size);
1153 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1154 matroska->current_id = 0;
1155 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1157 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1158 av_log(matroska->ctx, AV_LOG_ERROR,
1159 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1160 length, max_lengths[syntax->type], syntax->type);
1161 return AVERROR_INVALIDDATA;
1165 switch (syntax->type) {
1167 res = ebml_read_uint(pb, length, data);
1170 res = ebml_read_sint(pb, length, data);
1173 res = ebml_read_float(pb, length, data);
1177 res = ebml_read_ascii(pb, length, data);
1180 res = ebml_read_binary(pb, length, data);
1184 if ((res = ebml_read_master(matroska, length)) < 0)
1186 if (id == MATROSKA_ID_SEGMENT)
1187 matroska->segment_start = avio_tell(matroska->ctx->pb);
1188 if (id == MATROSKA_ID_CUES)
1189 matroska->cues_parsing_deferred = 0;
1190 if (syntax->type == EBML_LEVEL1 &&
1191 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1192 if (level1_elem->parsed)
1193 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1194 level1_elem->parsed = 1;
1196 return ebml_parse_nest(matroska, syntax->def.n, data);
1198 return ebml_parse_id(matroska, syntax->def.n, id, data);
1202 if (ffio_limit(pb, length) != length)
1203 return AVERROR(EIO);
1204 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1206 if (res == AVERROR_INVALIDDATA)
1207 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1208 else if (res == AVERROR(EIO))
1209 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1213 static void ebml_free(EbmlSyntax *syntax, void *data)
1216 for (i = 0; syntax[i].id; i++) {
1217 void *data_off = (char *) data + syntax[i].data_offset;
1218 switch (syntax[i].type) {
1224 av_freep(&((EbmlBin *) data_off)->data);
1228 if (syntax[i].list_elem_size) {
1229 EbmlList *list = data_off;
1230 char *ptr = list->elem;
1231 for (j = 0; j < list->nb_elem;
1232 j++, ptr += syntax[i].list_elem_size)
1233 ebml_free(syntax[i].def.n, ptr);
1234 av_freep(&list->elem);
1236 ebml_free(syntax[i].def.n, data_off);
1246 static int matroska_probe(AVProbeData *p)
1249 int len_mask = 0x80, size = 1, n = 1, i;
1252 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1255 /* length of header */
1257 while (size <= 8 && !(total & len_mask)) {
1263 total &= (len_mask - 1);
1265 total = (total << 8) | p->buf[4 + n++];
1267 /* Does the probe data contain the whole header? */
1268 if (p->buf_size < 4 + size + total)
1271 /* The header should contain a known document type. For now,
1272 * we don't parse the whole header but simply check for the
1273 * availability of that array of characters inside the header.
1274 * Not fully fool-proof, but good enough. */
1275 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1276 size_t probelen = strlen(matroska_doctypes[i]);
1277 if (total < probelen)
1279 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1280 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1281 return AVPROBE_SCORE_MAX;
1284 // probably valid EBML header but no recognized doctype
1285 return AVPROBE_SCORE_EXTENSION;
1288 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1291 MatroskaTrack *tracks = matroska->tracks.elem;
1294 for (i = 0; i < matroska->tracks.nb_elem; i++)
1295 if (tracks[i].num == num)
1298 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1302 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1303 MatroskaTrack *track)
1305 MatroskaTrackEncoding *encodings = track->encodings.elem;
1306 uint8_t *data = *buf;
1307 int isize = *buf_size;
1308 uint8_t *pkt_data = NULL;
1309 uint8_t av_unused *newpktdata;
1310 int pkt_size = isize;
1314 if (pkt_size >= 10000000U)
1315 return AVERROR_INVALIDDATA;
1317 switch (encodings[0].compression.algo) {
1318 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1320 int header_size = encodings[0].compression.settings.size;
1321 uint8_t *header = encodings[0].compression.settings.data;
1323 if (header_size && !header) {
1324 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1331 pkt_size = isize + header_size;
1332 pkt_data = av_malloc(pkt_size);
1334 return AVERROR(ENOMEM);
1336 memcpy(pkt_data, header, header_size);
1337 memcpy(pkt_data + header_size, data, isize);
1341 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1343 olen = pkt_size *= 3;
1344 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1346 result = AVERROR(ENOMEM);
1349 pkt_data = newpktdata;
1350 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1351 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1353 result = AVERROR_INVALIDDATA;
1360 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1362 z_stream zstream = { 0 };
1363 if (inflateInit(&zstream) != Z_OK)
1365 zstream.next_in = data;
1366 zstream.avail_in = isize;
1369 newpktdata = av_realloc(pkt_data, pkt_size);
1371 inflateEnd(&zstream);
1372 result = AVERROR(ENOMEM);
1375 pkt_data = newpktdata;
1376 zstream.avail_out = pkt_size - zstream.total_out;
1377 zstream.next_out = pkt_data + zstream.total_out;
1378 result = inflate(&zstream, Z_NO_FLUSH);
1379 } while (result == Z_OK && pkt_size < 10000000);
1380 pkt_size = zstream.total_out;
1381 inflateEnd(&zstream);
1382 if (result != Z_STREAM_END) {
1383 if (result == Z_MEM_ERROR)
1384 result = AVERROR(ENOMEM);
1386 result = AVERROR_INVALIDDATA;
1393 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1395 bz_stream bzstream = { 0 };
1396 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1398 bzstream.next_in = data;
1399 bzstream.avail_in = isize;
1402 newpktdata = av_realloc(pkt_data, pkt_size);
1404 BZ2_bzDecompressEnd(&bzstream);
1405 result = AVERROR(ENOMEM);
1408 pkt_data = newpktdata;
1409 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1410 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1411 result = BZ2_bzDecompress(&bzstream);
1412 } while (result == BZ_OK && pkt_size < 10000000);
1413 pkt_size = bzstream.total_out_lo32;
1414 BZ2_bzDecompressEnd(&bzstream);
1415 if (result != BZ_STREAM_END) {
1416 if (result == BZ_MEM_ERROR)
1417 result = AVERROR(ENOMEM);
1419 result = AVERROR_INVALIDDATA;
1426 return AVERROR_INVALIDDATA;
1430 *buf_size = pkt_size;
1438 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1439 AVDictionary **metadata, char *prefix)
1441 MatroskaTag *tags = list->elem;
1445 for (i = 0; i < list->nb_elem; i++) {
1446 const char *lang = tags[i].lang &&
1447 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1449 if (!tags[i].name) {
1450 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1454 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1456 av_strlcpy(key, tags[i].name, sizeof(key));
1457 if (tags[i].def || !lang) {
1458 av_dict_set(metadata, key, tags[i].string, 0);
1459 if (tags[i].sub.nb_elem)
1460 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1463 av_strlcat(key, "-", sizeof(key));
1464 av_strlcat(key, lang, sizeof(key));
1465 av_dict_set(metadata, key, tags[i].string, 0);
1466 if (tags[i].sub.nb_elem)
1467 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1470 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1473 static void matroska_convert_tags(AVFormatContext *s)
1475 MatroskaDemuxContext *matroska = s->priv_data;
1476 MatroskaTags *tags = matroska->tags.elem;
1479 for (i = 0; i < matroska->tags.nb_elem; i++) {
1480 if (tags[i].target.attachuid) {
1481 MatroskaAttachment *attachment = matroska->attachments.elem;
1483 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1484 if (attachment[j].uid == tags[i].target.attachuid &&
1485 attachment[j].stream) {
1486 matroska_convert_tag(s, &tags[i].tag,
1487 &attachment[j].stream->metadata, NULL);
1492 av_log(NULL, AV_LOG_WARNING,
1493 "The tags at index %d refer to a "
1494 "non-existent attachment %"PRId64".\n",
1495 i, tags[i].target.attachuid);
1497 } else if (tags[i].target.chapteruid) {
1498 MatroskaChapter *chapter = matroska->chapters.elem;
1500 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1501 if (chapter[j].uid == tags[i].target.chapteruid &&
1502 chapter[j].chapter) {
1503 matroska_convert_tag(s, &tags[i].tag,
1504 &chapter[j].chapter->metadata, NULL);
1509 av_log(NULL, AV_LOG_WARNING,
1510 "The tags at index %d refer to a non-existent chapter "
1512 i, tags[i].target.chapteruid);
1514 } else if (tags[i].target.trackuid) {
1515 MatroskaTrack *track = matroska->tracks.elem;
1517 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1518 if (track[j].uid == tags[i].target.trackuid &&
1520 matroska_convert_tag(s, &tags[i].tag,
1521 &track[j].stream->metadata, NULL);
1526 av_log(NULL, AV_LOG_WARNING,
1527 "The tags at index %d refer to a non-existent track "
1529 i, tags[i].target.trackuid);
1532 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1533 tags[i].target.type);
1538 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1541 uint32_t level_up = matroska->level_up;
1542 uint32_t saved_id = matroska->current_id;
1543 int64_t before_pos = avio_tell(matroska->ctx->pb);
1544 MatroskaLevel level;
1549 offset = pos + matroska->segment_start;
1550 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1551 /* We don't want to lose our seekhead level, so we add
1552 * a dummy. This is a crude hack. */
1553 if (matroska->num_levels == EBML_MAX_DEPTH) {
1554 av_log(matroska->ctx, AV_LOG_INFO,
1555 "Max EBML element depth (%d) reached, "
1556 "cannot parse further.\n", EBML_MAX_DEPTH);
1557 ret = AVERROR_INVALIDDATA;
1560 level.length = (uint64_t) -1;
1561 matroska->levels[matroska->num_levels] = level;
1562 matroska->num_levels++;
1563 matroska->current_id = 0;
1565 ret = ebml_parse(matroska, matroska_segment, matroska);
1567 /* remove dummy level */
1568 while (matroska->num_levels) {
1569 uint64_t length = matroska->levels[--matroska->num_levels].length;
1570 if (length == (uint64_t) -1)
1576 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1577 matroska->level_up = level_up;
1578 matroska->current_id = saved_id;
1583 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1585 EbmlList *seekhead_list = &matroska->seekhead;
1588 // we should not do any seeking in the streaming case
1589 if (!matroska->ctx->pb->seekable)
1592 for (i = 0; i < seekhead_list->nb_elem; i++) {
1593 MatroskaSeekhead *seekheads = seekhead_list->elem;
1594 uint32_t id = seekheads[i].id;
1595 uint64_t pos = seekheads[i].pos;
1597 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1598 if (!elem || elem->parsed)
1603 // defer cues parsing until we actually need cue data.
1604 if (id == MATROSKA_ID_CUES)
1607 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1608 // mark index as broken
1609 matroska->cues_parsing_deferred = -1;
1617 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1619 EbmlList *index_list;
1620 MatroskaIndex *index;
1621 uint64_t index_scale = 1;
1624 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1627 index_list = &matroska->index;
1628 index = index_list->elem;
1629 if (index_list->nb_elem < 2)
1631 if (index[1].time > 1E14 / matroska->time_scale) {
1632 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1635 for (i = 0; i < index_list->nb_elem; i++) {
1636 EbmlList *pos_list = &index[i].pos;
1637 MatroskaIndexPos *pos = pos_list->elem;
1638 for (j = 0; j < pos_list->nb_elem; j++) {
1639 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1641 if (track && track->stream)
1642 av_add_index_entry(track->stream,
1643 pos[j].pos + matroska->segment_start,
1644 index[i].time / index_scale, 0, 0,
1650 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1653 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1656 for (i = 0; i < matroska->num_level1_elems; i++) {
1657 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1658 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1659 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1660 matroska->cues_parsing_deferred = -1;
1666 matroska_add_index_entries(matroska);
1669 static int matroska_aac_profile(char *codec_id)
1671 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1674 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1675 if (strstr(codec_id, aac_profiles[profile]))
1680 static int matroska_aac_sri(int samplerate)
1684 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1685 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1690 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1693 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1694 time_t creation_time = date_utc / 1000000000 + 978307200;
1695 struct tm tmpbuf, *ptm = gmtime_r(&creation_time, &tmpbuf);
1697 if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
1698 av_dict_set(metadata, "creation_time", buffer, 0);
1701 static int matroska_parse_flac(AVFormatContext *s,
1702 MatroskaTrack *track,
1705 AVStream *st = track->stream;
1706 uint8_t *p = track->codec_priv.data;
1707 int size = track->codec_priv.size;
1709 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1710 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1711 track->codec_priv.size = 0;
1715 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1717 p += track->codec_priv.size;
1718 size -= track->codec_priv.size;
1720 /* parse the remaining metadata blocks if present */
1722 int block_last, block_type, block_size;
1724 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1728 if (block_size > size)
1731 /* check for the channel mask */
1732 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1733 AVDictionary *dict = NULL;
1734 AVDictionaryEntry *chmask;
1736 ff_vorbis_comment(s, &dict, p, block_size, 0);
1737 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1739 uint64_t mask = strtol(chmask->value, NULL, 0);
1740 if (!mask || mask & ~0x3ffffULL) {
1741 av_log(s, AV_LOG_WARNING,
1742 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1744 st->codecpar->channel_layout = mask;
1746 av_dict_free(&dict);
1756 static int mkv_field_order(int64_t field_order)
1758 switch (field_order) {
1759 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1760 return AV_FIELD_PROGRESSIVE;
1761 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1762 return AV_FIELD_UNKNOWN;
1763 case MATROSKA_VIDEO_FIELDORDER_TT:
1765 case MATROSKA_VIDEO_FIELDORDER_BB:
1767 case MATROSKA_VIDEO_FIELDORDER_BT:
1769 case MATROSKA_VIDEO_FIELDORDER_TB:
1772 return AV_FIELD_UNKNOWN;
1776 static void mkv_stereo_mode_display_mul(int stereo_mode,
1777 int *h_width, int *h_height)
1779 switch (stereo_mode) {
1780 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1781 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1782 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1783 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1784 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1786 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1787 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1788 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1789 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1792 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1793 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1794 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1795 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1801 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1802 const MatroskaMasteringMeta* mastering_meta =
1803 &track->video.color.mastering_meta;
1804 // Mastering primaries are CIE 1931 coords, and must be > 0.
1805 const int has_mastering_primaries =
1806 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1807 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1808 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1809 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1810 const int has_mastering_luminance = mastering_meta->max_luminance > 0;
1812 if (track->video.color.matrix_coefficients != AVCOL_SPC_RESERVED)
1813 st->codecpar->color_space = track->video.color.matrix_coefficients;
1814 if (track->video.color.primaries != AVCOL_PRI_RESERVED)
1815 st->codecpar->color_primaries = track->video.color.primaries;
1816 if (track->video.color.transfer_characteristics != AVCOL_TRC_RESERVED)
1817 st->codecpar->color_trc = track->video.color.transfer_characteristics;
1818 if (track->video.color.range != AVCOL_RANGE_UNSPECIFIED &&
1819 track->video.color.range <= AVCOL_RANGE_JPEG)
1820 st->codecpar->color_range = track->video.color.range;
1822 if (has_mastering_primaries || has_mastering_luminance) {
1823 // Use similar rationals as other standards.
1824 const int chroma_den = 50000;
1825 const int luma_den = 10000;
1826 AVMasteringDisplayMetadata *metadata =
1827 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1828 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1829 sizeof(AVMasteringDisplayMetadata));
1831 return AVERROR(ENOMEM);
1833 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1834 if (has_mastering_primaries) {
1835 metadata->display_primaries[0][0] = av_make_q(
1836 round(mastering_meta->r_x * chroma_den), chroma_den);
1837 metadata->display_primaries[0][1] = av_make_q(
1838 round(mastering_meta->r_y * chroma_den), chroma_den);
1839 metadata->display_primaries[1][0] = av_make_q(
1840 round(mastering_meta->g_x * chroma_den), chroma_den);
1841 metadata->display_primaries[1][1] = av_make_q(
1842 round(mastering_meta->g_y * chroma_den), chroma_den);
1843 metadata->display_primaries[2][0] = av_make_q(
1844 round(mastering_meta->b_x * chroma_den), chroma_den);
1845 metadata->display_primaries[2][1] = av_make_q(
1846 round(mastering_meta->b_y * chroma_den), chroma_den);
1847 metadata->white_point[0] = av_make_q(
1848 round(mastering_meta->white_x * chroma_den), chroma_den);
1849 metadata->white_point[1] = av_make_q(
1850 round(mastering_meta->white_y * chroma_den), chroma_den);
1851 metadata->has_primaries = 1;
1853 if (has_mastering_luminance) {
1854 metadata->max_luminance = av_make_q(
1855 round(mastering_meta->max_luminance * luma_den), luma_den);
1856 metadata->min_luminance = av_make_q(
1857 round(mastering_meta->min_luminance * luma_den), luma_den);
1858 metadata->has_luminance = 1;
1864 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1866 const AVCodecTag *codec_tags;
1868 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1869 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
1871 /* Normalize noncompliant private data that starts with the fourcc
1872 * by expanding/shifting the data by 4 bytes and storing the data
1873 * size at the start. */
1874 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1875 uint8_t *p = av_realloc(track->codec_priv.data,
1876 track->codec_priv.size + 4);
1878 return AVERROR(ENOMEM);
1879 memmove(p + 4, p, track->codec_priv.size);
1880 track->codec_priv.data = p;
1881 track->codec_priv.size += 4;
1882 AV_WB32(track->codec_priv.data, track->codec_priv.size);
1885 *fourcc = AV_RL32(track->codec_priv.data + 4);
1886 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1891 static int matroska_parse_tracks(AVFormatContext *s)
1893 MatroskaDemuxContext *matroska = s->priv_data;
1894 MatroskaTrack *tracks = matroska->tracks.elem;
1899 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1900 MatroskaTrack *track = &tracks[i];
1901 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1902 EbmlList *encodings_list = &track->encodings;
1903 MatroskaTrackEncoding *encodings = encodings_list->elem;
1904 uint8_t *extradata = NULL;
1905 int extradata_size = 0;
1906 int extradata_offset = 0;
1907 uint32_t fourcc = 0;
1909 char* key_id_base64 = NULL;
1912 /* Apply some sanity checks. */
1913 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1914 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1915 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1916 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1917 av_log(matroska->ctx, AV_LOG_INFO,
1918 "Unknown or unsupported track type %"PRIu64"\n",
1922 if (!track->codec_id)
1925 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1926 isnan(track->audio.samplerate)) {
1927 av_log(matroska->ctx, AV_LOG_WARNING,
1928 "Invalid sample rate %f, defaulting to 8000 instead.\n",
1929 track->audio.samplerate);
1930 track->audio.samplerate = 8000;
1933 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1934 if (!track->default_duration && track->video.frame_rate > 0)
1935 track->default_duration = 1000000000 / track->video.frame_rate;
1936 if (track->video.display_width == -1)
1937 track->video.display_width = track->video.pixel_width;
1938 if (track->video.display_height == -1)
1939 track->video.display_height = track->video.pixel_height;
1940 if (track->video.color_space.size == 4)
1941 fourcc = AV_RL32(track->video.color_space.data);
1942 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1943 if (!track->audio.out_samplerate)
1944 track->audio.out_samplerate = track->audio.samplerate;
1946 if (encodings_list->nb_elem > 1) {
1947 av_log(matroska->ctx, AV_LOG_ERROR,
1948 "Multiple combined encodings not supported");
1949 } else if (encodings_list->nb_elem == 1) {
1950 if (encodings[0].type) {
1951 if (encodings[0].encryption.key_id.size > 0) {
1952 /* Save the encryption key id to be stored later as a
1954 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1955 key_id_base64 = av_malloc(b64_size);
1956 if (key_id_base64 == NULL)
1957 return AVERROR(ENOMEM);
1959 av_base64_encode(key_id_base64, b64_size,
1960 encodings[0].encryption.key_id.data,
1961 encodings[0].encryption.key_id.size);
1963 encodings[0].scope = 0;
1964 av_log(matroska->ctx, AV_LOG_ERROR,
1965 "Unsupported encoding type");
1969 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1972 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1975 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1977 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1978 encodings[0].scope = 0;
1979 av_log(matroska->ctx, AV_LOG_ERROR,
1980 "Unsupported encoding type");
1981 } else if (track->codec_priv.size && encodings[0].scope & 2) {
1982 uint8_t *codec_priv = track->codec_priv.data;
1983 int ret = matroska_decode_buffer(&track->codec_priv.data,
1984 &track->codec_priv.size,
1987 track->codec_priv.data = NULL;
1988 track->codec_priv.size = 0;
1989 av_log(matroska->ctx, AV_LOG_ERROR,
1990 "Failed to decode codec private data\n");
1993 if (codec_priv != track->codec_priv.data)
1994 av_free(codec_priv);
1998 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1999 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2000 strlen(ff_mkv_codec_tags[j].str))) {
2001 codec_id = ff_mkv_codec_tags[j].id;
2006 st = track->stream = avformat_new_stream(s, NULL);
2008 av_free(key_id_base64);
2009 return AVERROR(ENOMEM);
2012 if (key_id_base64) {
2013 /* export encryption key id as base64 metadata tag */
2014 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2015 av_freep(&key_id_base64);
2018 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2019 track->codec_priv.size >= 40 &&
2020 track->codec_priv.data) {
2021 track->ms_compat = 1;
2022 bit_depth = AV_RL16(track->codec_priv.data + 14);
2023 fourcc = AV_RL32(track->codec_priv.data + 16);
2024 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2027 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2029 extradata_offset = 40;
2030 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2031 track->codec_priv.size >= 14 &&
2032 track->codec_priv.data) {
2034 ffio_init_context(&b, track->codec_priv.data,
2035 track->codec_priv.size,
2036 0, NULL, NULL, NULL, NULL);
2037 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2040 codec_id = st->codecpar->codec_id;
2041 fourcc = st->codecpar->codec_tag;
2042 extradata_offset = FFMIN(track->codec_priv.size, 18);
2043 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2044 /* Normally 36, but allow noncompliant private data */
2045 && (track->codec_priv.size >= 32)
2046 && (track->codec_priv.data)) {
2047 uint16_t sample_size;
2048 int ret = get_qt_codec(track, &fourcc, &codec_id);
2051 sample_size = AV_RB16(track->codec_priv.data + 26);
2053 if (sample_size == 8) {
2054 fourcc = MKTAG('r','a','w',' ');
2055 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2056 } else if (sample_size == 16) {
2057 fourcc = MKTAG('t','w','o','s');
2058 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2061 if ((fourcc == MKTAG('t','w','o','s') ||
2062 fourcc == MKTAG('s','o','w','t')) &&
2064 codec_id = AV_CODEC_ID_PCM_S8;
2065 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2066 (track->codec_priv.size >= 21) &&
2067 (track->codec_priv.data)) {
2068 int ret = get_qt_codec(track, &fourcc, &codec_id);
2071 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2072 fourcc = MKTAG('S','V','Q','3');
2073 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2075 if (codec_id == AV_CODEC_ID_NONE) {
2077 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2078 av_log(matroska->ctx, AV_LOG_ERROR,
2079 "mov FourCC not found %s.\n", buf);
2081 if (track->codec_priv.size >= 86) {
2082 bit_depth = AV_RB16(track->codec_priv.data + 82);
2083 ffio_init_context(&b, track->codec_priv.data,
2084 track->codec_priv.size,
2085 0, NULL, NULL, NULL, NULL);
2086 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2088 track->has_palette = 1;
2091 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2092 switch (track->audio.bitdepth) {
2094 codec_id = AV_CODEC_ID_PCM_U8;
2097 codec_id = AV_CODEC_ID_PCM_S24BE;
2100 codec_id = AV_CODEC_ID_PCM_S32BE;
2103 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2104 switch (track->audio.bitdepth) {
2106 codec_id = AV_CODEC_ID_PCM_U8;
2109 codec_id = AV_CODEC_ID_PCM_S24LE;
2112 codec_id = AV_CODEC_ID_PCM_S32LE;
2115 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2116 track->audio.bitdepth == 64) {
2117 codec_id = AV_CODEC_ID_PCM_F64LE;
2118 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2119 int profile = matroska_aac_profile(track->codec_id);
2120 int sri = matroska_aac_sri(track->audio.samplerate);
2121 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2123 return AVERROR(ENOMEM);
2124 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2125 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2126 if (strstr(track->codec_id, "SBR")) {
2127 sri = matroska_aac_sri(track->audio.out_samplerate);
2128 extradata[2] = 0x56;
2129 extradata[3] = 0xE5;
2130 extradata[4] = 0x80 | (sri << 3);
2134 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2135 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2136 * Create the "atom size", "tag", and "tag version" fields the
2137 * decoder expects manually. */
2138 extradata_size = 12 + track->codec_priv.size;
2139 extradata = av_mallocz(extradata_size +
2140 AV_INPUT_BUFFER_PADDING_SIZE);
2142 return AVERROR(ENOMEM);
2143 AV_WB32(extradata, extradata_size);
2144 memcpy(&extradata[4], "alac", 4);
2145 AV_WB32(&extradata[8], 0);
2146 memcpy(&extradata[12], track->codec_priv.data,
2147 track->codec_priv.size);
2148 } else if (codec_id == AV_CODEC_ID_TTA) {
2149 extradata_size = 30;
2150 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2152 return AVERROR(ENOMEM);
2153 ffio_init_context(&b, extradata, extradata_size, 1,
2154 NULL, NULL, NULL, NULL);
2155 avio_write(&b, "TTA1", 4);
2157 if (track->audio.channels > UINT16_MAX ||
2158 track->audio.bitdepth > UINT16_MAX) {
2159 av_log(matroska->ctx, AV_LOG_WARNING,
2160 "Too large audio channel number %"PRIu64
2161 " or bitdepth %"PRIu64". Skipping track.\n",
2162 track->audio.channels, track->audio.bitdepth);
2163 av_freep(&extradata);
2164 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2165 return AVERROR_INVALIDDATA;
2169 avio_wl16(&b, track->audio.channels);
2170 avio_wl16(&b, track->audio.bitdepth);
2171 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2172 return AVERROR_INVALIDDATA;
2173 avio_wl32(&b, track->audio.out_samplerate);
2174 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2175 track->audio.out_samplerate,
2176 AV_TIME_BASE * 1000));
2177 } else if (codec_id == AV_CODEC_ID_RV10 ||
2178 codec_id == AV_CODEC_ID_RV20 ||
2179 codec_id == AV_CODEC_ID_RV30 ||
2180 codec_id == AV_CODEC_ID_RV40) {
2181 extradata_offset = 26;
2182 } else if (codec_id == AV_CODEC_ID_RA_144) {
2183 track->audio.out_samplerate = 8000;
2184 track->audio.channels = 1;
2185 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2186 codec_id == AV_CODEC_ID_COOK ||
2187 codec_id == AV_CODEC_ID_ATRAC3 ||
2188 codec_id == AV_CODEC_ID_SIPR)
2189 && track->codec_priv.data) {
2192 ffio_init_context(&b, track->codec_priv.data,
2193 track->codec_priv.size,
2194 0, NULL, NULL, NULL, NULL);
2196 flavor = avio_rb16(&b);
2197 track->audio.coded_framesize = avio_rb32(&b);
2199 track->audio.sub_packet_h = avio_rb16(&b);
2200 track->audio.frame_size = avio_rb16(&b);
2201 track->audio.sub_packet_size = avio_rb16(&b);
2203 track->audio.coded_framesize <= 0 ||
2204 track->audio.sub_packet_h <= 0 ||
2205 track->audio.frame_size <= 0 ||
2206 track->audio.sub_packet_size <= 0)
2207 return AVERROR_INVALIDDATA;
2208 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2209 track->audio.frame_size);
2210 if (!track->audio.buf)
2211 return AVERROR(ENOMEM);
2212 if (codec_id == AV_CODEC_ID_RA_288) {
2213 st->codecpar->block_align = track->audio.coded_framesize;
2214 track->codec_priv.size = 0;
2216 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2217 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2218 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2219 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2221 st->codecpar->block_align = track->audio.sub_packet_size;
2222 extradata_offset = 78;
2224 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2225 ret = matroska_parse_flac(s, track, &extradata_offset);
2228 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2229 fourcc = AV_RL32(track->codec_priv.data);
2231 track->codec_priv.size -= extradata_offset;
2233 if (codec_id == AV_CODEC_ID_NONE)
2234 av_log(matroska->ctx, AV_LOG_INFO,
2235 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2237 if (track->time_scale < 0.01)
2238 track->time_scale = 1.0;
2239 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2240 1000 * 1000 * 1000); /* 64 bit pts in ns */
2242 /* convert the delay from ns to the track timebase */
2243 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2244 (AVRational){ 1, 1000000000 },
2247 st->codecpar->codec_id = codec_id;
2249 if (strcmp(track->language, "und"))
2250 av_dict_set(&st->metadata, "language", track->language, 0);
2251 av_dict_set(&st->metadata, "title", track->name, 0);
2253 if (track->flag_default)
2254 st->disposition |= AV_DISPOSITION_DEFAULT;
2255 if (track->flag_forced)
2256 st->disposition |= AV_DISPOSITION_FORCED;
2258 if (!st->codecpar->extradata) {
2260 st->codecpar->extradata = extradata;
2261 st->codecpar->extradata_size = extradata_size;
2262 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2263 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2264 return AVERROR(ENOMEM);
2265 memcpy(st->codecpar->extradata,
2266 track->codec_priv.data + extradata_offset,
2267 track->codec_priv.size);
2271 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2272 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2273 int display_width_mul = 1;
2274 int display_height_mul = 1;
2276 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2277 st->codecpar->codec_tag = fourcc;
2279 st->codecpar->bits_per_coded_sample = bit_depth;
2280 st->codecpar->width = track->video.pixel_width;
2281 st->codecpar->height = track->video.pixel_height;
2283 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2284 st->codecpar->field_order = mkv_field_order(track->video.field_order);
2286 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2287 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2289 av_reduce(&st->sample_aspect_ratio.num,
2290 &st->sample_aspect_ratio.den,
2291 st->codecpar->height * track->video.display_width * display_width_mul,
2292 st->codecpar->width * track->video.display_height * display_height_mul,
2294 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2295 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2297 if (track->default_duration) {
2298 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2299 1000000000, track->default_duration, 30000);
2300 #if FF_API_R_FRAME_RATE
2301 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2302 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2303 st->r_frame_rate = st->avg_frame_rate;
2307 /* export stereo mode flag as metadata tag */
2308 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2309 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2311 /* export alpha mode flag as metadata tag */
2312 if (track->video.alpha_mode)
2313 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2315 /* if we have virtual track, mark the real tracks */
2316 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2318 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2320 snprintf(buf, sizeof(buf), "%s_%d",
2321 ff_matroska_video_stereo_plane[planes[j].type], i);
2322 for (k=0; k < matroska->tracks.nb_elem; k++)
2323 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2324 av_dict_set(&tracks[k].stream->metadata,
2325 "stereo_mode", buf, 0);
2329 // add stream level stereo3d side data if it is a supported format
2330 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2331 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2332 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2337 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
2338 int ret = mkv_parse_video_color(st, track);
2342 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2343 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2344 st->codecpar->codec_tag = fourcc;
2345 st->codecpar->sample_rate = track->audio.out_samplerate;
2346 st->codecpar->channels = track->audio.channels;
2347 if (!st->codecpar->bits_per_coded_sample)
2348 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2349 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2350 st->need_parsing = AVSTREAM_PARSE_FULL;
2351 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2352 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2353 if (track->codec_delay > 0) {
2354 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2355 (AVRational){1, 1000000000},
2356 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2357 48000 : st->codecpar->sample_rate});
2359 if (track->seek_preroll > 0) {
2360 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2361 (AVRational){1, 1000000000},
2362 (AVRational){1, st->codecpar->sample_rate});
2364 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2365 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2367 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2368 st->disposition |= AV_DISPOSITION_CAPTIONS;
2369 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2370 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2371 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2372 st->disposition |= AV_DISPOSITION_METADATA;
2374 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2375 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2376 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2377 matroska->contains_ssa = 1;
2384 static int matroska_read_header(AVFormatContext *s)
2386 MatroskaDemuxContext *matroska = s->priv_data;
2387 EbmlList *attachments_list = &matroska->attachments;
2388 EbmlList *chapters_list = &matroska->chapters;
2389 MatroskaAttachment *attachments;
2390 MatroskaChapter *chapters;
2391 uint64_t max_start = 0;
2397 matroska->cues_parsing_deferred = 1;
2399 /* First read the EBML header. */
2400 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2401 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2402 ebml_free(ebml_syntax, &ebml);
2403 return AVERROR_INVALIDDATA;
2405 if (ebml.version > EBML_VERSION ||
2406 ebml.max_size > sizeof(uint64_t) ||
2407 ebml.id_length > sizeof(uint32_t) ||
2408 ebml.doctype_version > 3) {
2409 av_log(matroska->ctx, AV_LOG_ERROR,
2410 "EBML header using unsupported features\n"
2411 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2412 ebml.version, ebml.doctype, ebml.doctype_version);
2413 ebml_free(ebml_syntax, &ebml);
2414 return AVERROR_PATCHWELCOME;
2415 } else if (ebml.doctype_version == 3) {
2416 av_log(matroska->ctx, AV_LOG_WARNING,
2417 "EBML header using unsupported features\n"
2418 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2419 ebml.version, ebml.doctype, ebml.doctype_version);
2421 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2422 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2424 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2425 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2426 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2427 ebml_free(ebml_syntax, &ebml);
2428 return AVERROR_INVALIDDATA;
2431 ebml_free(ebml_syntax, &ebml);
2433 /* The next thing is a segment. */
2434 pos = avio_tell(matroska->ctx->pb);
2435 res = ebml_parse(matroska, matroska_segments, matroska);
2436 // try resyncing until we find a EBML_STOP type element.
2438 res = matroska_resync(matroska, pos);
2441 pos = avio_tell(matroska->ctx->pb);
2442 res = ebml_parse(matroska, matroska_segment, matroska);
2444 matroska_execute_seekhead(matroska);
2446 if (!matroska->time_scale)
2447 matroska->time_scale = 1000000;
2448 if (matroska->duration)
2449 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2450 1000 / AV_TIME_BASE;
2451 av_dict_set(&s->metadata, "title", matroska->title, 0);
2452 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2454 if (matroska->date_utc.size == 8)
2455 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2457 res = matroska_parse_tracks(s);
2461 attachments = attachments_list->elem;
2462 for (j = 0; j < attachments_list->nb_elem; j++) {
2463 if (!(attachments[j].filename && attachments[j].mime &&
2464 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2465 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2467 AVStream *st = avformat_new_stream(s, NULL);
2470 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2471 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2472 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2474 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2475 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2476 strlen(ff_mkv_image_mime_tags[i].str))) {
2477 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2482 attachments[j].stream = st;
2484 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2485 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2486 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2488 av_init_packet(&st->attached_pic);
2489 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2491 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2492 st->attached_pic.stream_index = st->index;
2493 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2495 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2496 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2498 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2499 attachments[j].bin.size);
2501 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2502 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2503 strlen(ff_mkv_mime_tags[i].str))) {
2504 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2512 chapters = chapters_list->elem;
2513 for (i = 0; i < chapters_list->nb_elem; i++)
2514 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2515 (max_start == 0 || chapters[i].start > max_start)) {
2516 chapters[i].chapter =
2517 avpriv_new_chapter(s, chapters[i].uid,
2518 (AVRational) { 1, 1000000000 },
2519 chapters[i].start, chapters[i].end,
2521 if (chapters[i].chapter) {
2522 av_dict_set(&chapters[i].chapter->metadata,
2523 "title", chapters[i].title, 0);
2525 max_start = chapters[i].start;
2528 matroska_add_index_entries(matroska);
2530 matroska_convert_tags(s);
2536 * Put one packet in an application-supplied AVPacket struct.
2537 * Returns 0 on success or -1 on failure.
2539 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2542 if (matroska->num_packets > 0) {
2543 MatroskaTrack *tracks = matroska->tracks.elem;
2544 MatroskaTrack *track;
2545 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2546 av_freep(&matroska->packets[0]);
2547 track = &tracks[pkt->stream_index];
2548 if (track->has_palette) {
2549 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2551 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2553 memcpy(pal, track->palette, AVPALETTE_SIZE);
2555 track->has_palette = 0;
2557 if (matroska->num_packets > 1) {
2559 memmove(&matroska->packets[0], &matroska->packets[1],
2560 (matroska->num_packets - 1) * sizeof(AVPacket *));
2561 newpackets = av_realloc(matroska->packets,
2562 (matroska->num_packets - 1) *
2563 sizeof(AVPacket *));
2565 matroska->packets = newpackets;
2567 av_freep(&matroska->packets);
2568 matroska->prev_pkt = NULL;
2570 matroska->num_packets--;
2578 * Free all packets in our internal queue.
2580 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2582 matroska->prev_pkt = NULL;
2583 if (matroska->packets) {
2585 for (n = 0; n < matroska->num_packets; n++) {
2586 av_packet_unref(matroska->packets[n]);
2587 av_freep(&matroska->packets[n]);
2589 av_freep(&matroska->packets);
2590 matroska->num_packets = 0;
2594 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2595 int *buf_size, int type,
2596 uint32_t **lace_buf, int *laces)
2598 int res = 0, n, size = *buf_size;
2599 uint8_t *data = *buf;
2600 uint32_t *lace_size;
2604 *lace_buf = av_mallocz(sizeof(int));
2606 return AVERROR(ENOMEM);
2608 *lace_buf[0] = size;
2612 av_assert0(size > 0);
2616 lace_size = av_mallocz(*laces * sizeof(int));
2618 return AVERROR(ENOMEM);
2621 case 0x1: /* Xiph lacing */
2625 for (n = 0; res == 0 && n < *laces - 1; n++) {
2627 if (size <= total) {
2628 res = AVERROR_INVALIDDATA;
2633 lace_size[n] += temp;
2640 if (size <= total) {
2641 res = AVERROR_INVALIDDATA;
2645 lace_size[n] = size - total;
2649 case 0x2: /* fixed-size lacing */
2650 if (size % (*laces)) {
2651 res = AVERROR_INVALIDDATA;
2654 for (n = 0; n < *laces; n++)
2655 lace_size[n] = size / *laces;
2658 case 0x3: /* EBML lacing */
2662 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2663 if (n < 0 || num > INT_MAX) {
2664 av_log(matroska->ctx, AV_LOG_INFO,
2665 "EBML block data error\n");
2666 res = n<0 ? n : AVERROR_INVALIDDATA;
2671 total = lace_size[0] = num;
2672 for (n = 1; res == 0 && n < *laces - 1; n++) {
2675 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2676 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2677 av_log(matroska->ctx, AV_LOG_INFO,
2678 "EBML block data error\n");
2679 res = r<0 ? r : AVERROR_INVALIDDATA;
2684 lace_size[n] = lace_size[n - 1] + snum;
2685 total += lace_size[n];
2687 if (size <= total) {
2688 res = AVERROR_INVALIDDATA;
2691 lace_size[*laces - 1] = size - total;
2697 *lace_buf = lace_size;
2703 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2704 MatroskaTrack *track, AVStream *st,
2705 uint8_t *data, int size, uint64_t timecode,
2708 int a = st->codecpar->block_align;
2709 int sps = track->audio.sub_packet_size;
2710 int cfs = track->audio.coded_framesize;
2711 int h = track->audio.sub_packet_h;
2712 int y = track->audio.sub_packet_cnt;
2713 int w = track->audio.frame_size;
2716 if (!track->audio.pkt_cnt) {
2717 if (track->audio.sub_packet_cnt == 0)
2718 track->audio.buf_timecode = timecode;
2719 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2720 if (size < cfs * h / 2) {
2721 av_log(matroska->ctx, AV_LOG_ERROR,
2722 "Corrupt int4 RM-style audio packet size\n");
2723 return AVERROR_INVALIDDATA;
2725 for (x = 0; x < h / 2; x++)
2726 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2727 data + x * cfs, cfs);
2728 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2730 av_log(matroska->ctx, AV_LOG_ERROR,
2731 "Corrupt sipr RM-style audio packet size\n");
2732 return AVERROR_INVALIDDATA;
2734 memcpy(track->audio.buf + y * w, data, w);
2736 if (size < sps * w / sps || h<=0 || w%sps) {
2737 av_log(matroska->ctx, AV_LOG_ERROR,
2738 "Corrupt generic RM-style audio packet size\n");
2739 return AVERROR_INVALIDDATA;
2741 for (x = 0; x < w / sps; x++)
2742 memcpy(track->audio.buf +
2743 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2744 data + x * sps, sps);
2747 if (++track->audio.sub_packet_cnt >= h) {
2748 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2749 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2750 track->audio.sub_packet_cnt = 0;
2751 track->audio.pkt_cnt = h * w / a;
2755 while (track->audio.pkt_cnt) {
2757 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2759 return AVERROR(ENOMEM);
2761 ret = av_new_packet(pkt, a);
2767 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2769 pkt->pts = track->audio.buf_timecode;
2770 track->audio.buf_timecode = AV_NOPTS_VALUE;
2772 pkt->stream_index = st->index;
2773 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2779 /* reconstruct full wavpack blocks from mangled matroska ones */
2780 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2781 uint8_t **pdst, int *size)
2783 uint8_t *dst = NULL;
2788 int ret, offset = 0;
2790 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2791 return AVERROR_INVALIDDATA;
2793 ver = AV_RL16(track->stream->codecpar->extradata);
2795 samples = AV_RL32(src);
2799 while (srclen >= 8) {
2804 uint32_t flags = AV_RL32(src);
2805 uint32_t crc = AV_RL32(src + 4);
2809 multiblock = (flags & 0x1800) != 0x1800;
2812 ret = AVERROR_INVALIDDATA;
2815 blocksize = AV_RL32(src);
2821 if (blocksize > srclen) {
2822 ret = AVERROR_INVALIDDATA;
2826 tmp = av_realloc(dst, dstlen + blocksize + 32);
2828 ret = AVERROR(ENOMEM);
2832 dstlen += blocksize + 32;
2834 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2835 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2836 AV_WL16(dst + offset + 8, ver); // version
2837 AV_WL16(dst + offset + 10, 0); // track/index_no
2838 AV_WL32(dst + offset + 12, 0); // total samples
2839 AV_WL32(dst + offset + 16, 0); // block index
2840 AV_WL32(dst + offset + 20, samples); // number of samples
2841 AV_WL32(dst + offset + 24, flags); // flags
2842 AV_WL32(dst + offset + 28, crc); // crc
2843 memcpy(dst + offset + 32, src, blocksize); // block data
2846 srclen -= blocksize;
2847 offset += blocksize + 32;
2860 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2861 MatroskaTrack *track,
2863 uint8_t *data, int data_len,
2869 uint8_t *id, *settings, *text, *buf;
2870 int id_len, settings_len, text_len;
2875 return AVERROR_INVALIDDATA;
2878 q = data + data_len;
2883 if (*p == '\r' || *p == '\n') {
2892 if (p >= q || *p != '\n')
2893 return AVERROR_INVALIDDATA;
2899 if (*p == '\r' || *p == '\n') {
2900 settings_len = p - settings;
2908 if (p >= q || *p != '\n')
2909 return AVERROR_INVALIDDATA;
2914 while (text_len > 0) {
2915 const int len = text_len - 1;
2916 const uint8_t c = p[len];
2917 if (c != '\r' && c != '\n')
2923 return AVERROR_INVALIDDATA;
2925 pkt = av_mallocz(sizeof(*pkt));
2927 return AVERROR(ENOMEM);
2928 err = av_new_packet(pkt, text_len);
2931 return AVERROR(err);
2934 memcpy(pkt->data, text, text_len);
2937 buf = av_packet_new_side_data(pkt,
2938 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2942 return AVERROR(ENOMEM);
2944 memcpy(buf, id, id_len);
2947 if (settings_len > 0) {
2948 buf = av_packet_new_side_data(pkt,
2949 AV_PKT_DATA_WEBVTT_SETTINGS,
2953 return AVERROR(ENOMEM);
2955 memcpy(buf, settings, settings_len);
2958 // Do we need this for subtitles?
2959 // pkt->flags = AV_PKT_FLAG_KEY;
2961 pkt->stream_index = st->index;
2962 pkt->pts = timecode;
2964 // Do we need this for subtitles?
2965 // pkt->dts = timecode;
2967 pkt->duration = duration;
2970 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2971 matroska->prev_pkt = pkt;
2976 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
2977 MatroskaTrack *track, AVStream *st,
2978 uint8_t *data, int pkt_size,
2979 uint64_t timecode, uint64_t lace_duration,
2980 int64_t pos, int is_keyframe,
2981 uint8_t *additional, uint64_t additional_id, int additional_size,
2982 int64_t discard_padding)
2984 MatroskaTrackEncoding *encodings = track->encodings.elem;
2985 uint8_t *pkt_data = data;
2986 int offset = 0, res;
2989 if (encodings && !encodings->type && encodings->scope & 1) {
2990 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
2995 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
2997 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
2999 av_log(matroska->ctx, AV_LOG_ERROR,
3000 "Error parsing a wavpack block.\n");
3003 if (pkt_data != data)
3004 av_freep(&pkt_data);
3008 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3009 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3012 pkt = av_mallocz(sizeof(AVPacket));
3014 if (pkt_data != data)
3015 av_freep(&pkt_data);
3016 return AVERROR(ENOMEM);
3018 /* XXX: prevent data copy... */
3019 if (av_new_packet(pkt, pkt_size + offset) < 0) {
3021 res = AVERROR(ENOMEM);
3025 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3026 uint8_t *buf = pkt->data;
3027 bytestream_put_be32(&buf, pkt_size);
3028 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3031 memcpy(pkt->data + offset, pkt_data, pkt_size);
3033 if (pkt_data != data)
3034 av_freep(&pkt_data);
3036 pkt->flags = is_keyframe;
3037 pkt->stream_index = st->index;
3039 if (additional_size > 0) {
3040 uint8_t *side_data = av_packet_new_side_data(pkt,
3041 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3042 additional_size + 8);
3044 av_packet_unref(pkt);
3046 return AVERROR(ENOMEM);
3048 AV_WB64(side_data, additional_id);
3049 memcpy(side_data + 8, additional, additional_size);
3052 if (discard_padding) {
3053 uint8_t *side_data = av_packet_new_side_data(pkt,
3054 AV_PKT_DATA_SKIP_SAMPLES,
3057 av_packet_unref(pkt);
3059 return AVERROR(ENOMEM);
3061 AV_WL32(side_data, 0);
3062 AV_WL32(side_data + 4, av_rescale_q(discard_padding,
3063 (AVRational){1, 1000000000},
3064 (AVRational){1, st->codecpar->sample_rate}));
3067 if (track->ms_compat)
3068 pkt->dts = timecode;
3070 pkt->pts = timecode;
3072 pkt->duration = lace_duration;
3074 #if FF_API_CONVERGENCE_DURATION
3075 FF_DISABLE_DEPRECATION_WARNINGS
3076 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3077 pkt->convergence_duration = lace_duration;
3079 FF_ENABLE_DEPRECATION_WARNINGS
3082 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3083 matroska->prev_pkt = pkt;
3088 if (pkt_data != data)
3089 av_freep(&pkt_data);
3093 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3094 int size, int64_t pos, uint64_t cluster_time,
3095 uint64_t block_duration, int is_keyframe,
3096 uint8_t *additional, uint64_t additional_id, int additional_size,
3097 int64_t cluster_pos, int64_t discard_padding)
3099 uint64_t timecode = AV_NOPTS_VALUE;
3100 MatroskaTrack *track;
3104 uint32_t *lace_size = NULL;
3105 int n, flags, laces = 0;
3107 int trust_default_duration = 1;
3109 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3110 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3116 track = matroska_find_track_by_num(matroska, num);
3117 if (!track || !track->stream) {
3118 av_log(matroska->ctx, AV_LOG_INFO,
3119 "Invalid stream %"PRIu64" or size %u\n", num, size);
3120 return AVERROR_INVALIDDATA;
3121 } else if (size <= 3)
3124 if (st->discard >= AVDISCARD_ALL)
3126 av_assert1(block_duration != AV_NOPTS_VALUE);
3128 block_time = sign_extend(AV_RB16(data), 16);
3132 if (is_keyframe == -1)
3133 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3135 if (cluster_time != (uint64_t) -1 &&
3136 (block_time >= 0 || cluster_time >= -block_time)) {
3137 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3138 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3139 timecode < track->end_timecode)
3140 is_keyframe = 0; /* overlapping subtitles are not key frame */
3142 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3146 if (matroska->skip_to_keyframe &&
3147 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3148 if (timecode < matroska->skip_to_timecode)
3151 matroska->skip_to_keyframe = 0;
3152 else if (!st->skip_to_keyframe) {
3153 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3154 matroska->skip_to_keyframe = 0;
3158 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3159 &lace_size, &laces);
3164 if (track->audio.samplerate == 8000) {
3165 // If this is needed for more codecs, then add them here
3166 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3167 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3168 trust_default_duration = 0;
3172 if (!block_duration && trust_default_duration)
3173 block_duration = track->default_duration * laces / matroska->time_scale;
3175 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3176 track->end_timecode =
3177 FFMAX(track->end_timecode, timecode + block_duration);
3179 for (n = 0; n < laces; n++) {
3180 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3182 if (lace_size[n] > size) {
3183 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3187 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3188 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3189 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3190 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3191 st->codecpar->block_align && track->audio.sub_packet_size) {
3192 res = matroska_parse_rm_audio(matroska, track, st, data,
3198 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3199 res = matroska_parse_webvtt(matroska, track, st,
3201 timecode, lace_duration,
3206 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3207 timecode, lace_duration, pos,
3208 !n ? is_keyframe : 0,
3209 additional, additional_id, additional_size,
3215 if (timecode != AV_NOPTS_VALUE)
3216 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3217 data += lace_size[n];
3218 size -= lace_size[n];
3226 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3228 EbmlList *blocks_list;
3229 MatroskaBlock *blocks;
3231 res = ebml_parse(matroska,
3232 matroska_cluster_incremental_parsing,
3233 &matroska->current_cluster);
3236 if (matroska->current_cluster_pos)
3237 ebml_level_end(matroska);
3238 ebml_free(matroska_cluster, &matroska->current_cluster);
3239 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3240 matroska->current_cluster_num_blocks = 0;
3241 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3242 matroska->prev_pkt = NULL;
3243 /* sizeof the ID which was already read */
3244 if (matroska->current_id)
3245 matroska->current_cluster_pos -= 4;
3246 res = ebml_parse(matroska,
3247 matroska_clusters_incremental,
3248 &matroska->current_cluster);
3249 /* Try parsing the block again. */
3251 res = ebml_parse(matroska,
3252 matroska_cluster_incremental_parsing,
3253 &matroska->current_cluster);
3257 matroska->current_cluster_num_blocks <
3258 matroska->current_cluster.blocks.nb_elem) {
3259 blocks_list = &matroska->current_cluster.blocks;
3260 blocks = blocks_list->elem;
3262 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3263 i = blocks_list->nb_elem - 1;
3264 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3265 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3266 uint8_t* additional = blocks[i].additional.size > 0 ?
3267 blocks[i].additional.data : NULL;
3268 if (!blocks[i].non_simple)
3269 blocks[i].duration = 0;
3270 res = matroska_parse_block(matroska, blocks[i].bin.data,
3271 blocks[i].bin.size, blocks[i].bin.pos,
3272 matroska->current_cluster.timecode,
3273 blocks[i].duration, is_keyframe,
3274 additional, blocks[i].additional_id,
3275 blocks[i].additional.size,
3276 matroska->current_cluster_pos,
3277 blocks[i].discard_padding);
3284 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3286 MatroskaCluster cluster = { 0 };
3287 EbmlList *blocks_list;
3288 MatroskaBlock *blocks;
3292 if (!matroska->contains_ssa)
3293 return matroska_parse_cluster_incremental(matroska);
3294 pos = avio_tell(matroska->ctx->pb);
3295 matroska->prev_pkt = NULL;
3296 if (matroska->current_id)
3297 pos -= 4; /* sizeof the ID which was already read */
3298 res = ebml_parse(matroska, matroska_clusters, &cluster);
3299 blocks_list = &cluster.blocks;
3300 blocks = blocks_list->elem;
3301 for (i = 0; i < blocks_list->nb_elem; i++)
3302 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3303 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3304 res = matroska_parse_block(matroska, blocks[i].bin.data,
3305 blocks[i].bin.size, blocks[i].bin.pos,
3306 cluster.timecode, blocks[i].duration,
3307 is_keyframe, NULL, 0, 0, pos,
3308 blocks[i].discard_padding);
3310 ebml_free(matroska_cluster, &cluster);
3314 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3316 MatroskaDemuxContext *matroska = s->priv_data;
3318 while (matroska_deliver_packet(matroska, pkt)) {
3319 int64_t pos = avio_tell(matroska->ctx->pb);
3322 if (matroska_parse_cluster(matroska) < 0)
3323 matroska_resync(matroska, pos);
3329 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3330 int64_t timestamp, int flags)
3332 MatroskaDemuxContext *matroska = s->priv_data;
3333 MatroskaTrack *tracks = NULL;
3334 AVStream *st = s->streams[stream_index];
3335 int i, index, index_sub, index_min;
3337 /* Parse the CUES now since we need the index data to seek. */
3338 if (matroska->cues_parsing_deferred > 0) {
3339 matroska->cues_parsing_deferred = 0;
3340 matroska_parse_cues(matroska);
3343 if (!st->nb_index_entries)
3345 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3347 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3348 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3350 matroska->current_id = 0;
3351 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3352 matroska_clear_queue(matroska);
3353 if (matroska_parse_cluster(matroska) < 0)
3358 matroska_clear_queue(matroska);
3359 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3363 tracks = matroska->tracks.elem;
3364 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3365 tracks[i].audio.pkt_cnt = 0;
3366 tracks[i].audio.sub_packet_cnt = 0;
3367 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3368 tracks[i].end_timecode = 0;
3369 if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3371 tracks[i].stream->discard != AVDISCARD_ALL) {
3372 index_sub = av_index_search_timestamp(
3373 tracks[i].stream, st->index_entries[index].timestamp,
3374 AVSEEK_FLAG_BACKWARD);
3375 while (index_sub >= 0 &&
3377 tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
3378 st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
3383 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3384 matroska->current_id = 0;
3385 if (flags & AVSEEK_FLAG_ANY) {
3386 st->skip_to_keyframe = 0;
3387 matroska->skip_to_timecode = timestamp;
3389 st->skip_to_keyframe = 1;
3390 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3392 matroska->skip_to_keyframe = 1;
3394 matroska->num_levels = 0;
3395 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3398 // slightly hackish but allows proper fallback to
3399 // the generic seeking code.
3400 matroska_clear_queue(matroska);
3401 matroska->current_id = 0;
3402 st->skip_to_keyframe =
3403 matroska->skip_to_keyframe = 0;
3405 matroska->num_levels = 0;
3409 static int matroska_read_close(AVFormatContext *s)
3411 MatroskaDemuxContext *matroska = s->priv_data;
3412 MatroskaTrack *tracks = matroska->tracks.elem;
3415 matroska_clear_queue(matroska);
3417 for (n = 0; n < matroska->tracks.nb_elem; n++)
3418 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3419 av_freep(&tracks[n].audio.buf);
3420 ebml_free(matroska_cluster, &matroska->current_cluster);
3421 ebml_free(matroska_segment, matroska);
3427 int64_t start_time_ns;
3428 int64_t end_time_ns;
3429 int64_t start_offset;
3433 /* This function searches all the Cues and returns the CueDesc corresponding the
3434 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3435 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3437 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3438 MatroskaDemuxContext *matroska = s->priv_data;
3441 int nb_index_entries = s->streams[0]->nb_index_entries;
3442 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3443 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3444 for (i = 1; i < nb_index_entries; i++) {
3445 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3446 index_entries[i].timestamp * matroska->time_scale > ts) {
3451 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3452 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3453 if (i != nb_index_entries - 1) {
3454 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3455 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3457 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3458 // FIXME: this needs special handling for files where Cues appear
3459 // before Clusters. the current logic assumes Cues appear after
3461 cue_desc.end_offset = cues_start - matroska->segment_start;
3466 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3468 MatroskaDemuxContext *matroska = s->priv_data;
3469 int64_t cluster_pos, before_pos;
3471 if (s->streams[0]->nb_index_entries <= 0) return 0;
3472 // seek to the first cluster using cues.
3473 index = av_index_search_timestamp(s->streams[0], 0, 0);
3474 if (index < 0) return 0;
3475 cluster_pos = s->streams[0]->index_entries[index].pos;
3476 before_pos = avio_tell(s->pb);
3478 int64_t cluster_id = 0, cluster_length = 0;
3480 avio_seek(s->pb, cluster_pos, SEEK_SET);
3481 // read cluster id and length
3482 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3483 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3484 if (cluster_id != 0xF43B675) { // done with all clusters
3487 avio_seek(s->pb, cluster_pos, SEEK_SET);
3488 matroska->current_id = 0;
3489 matroska_clear_queue(matroska);
3490 if (matroska_parse_cluster(matroska) < 0 ||
3491 matroska->num_packets <= 0) {
3494 pkt = matroska->packets[0];
3495 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3496 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3501 avio_seek(s->pb, before_pos, SEEK_SET);
3505 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3506 double min_buffer, double* buffer,
3507 double* sec_to_download, AVFormatContext *s,
3510 double nano_seconds_per_second = 1000000000.0;
3511 double time_sec = time_ns / nano_seconds_per_second;
3513 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3514 int64_t end_time_ns = time_ns + time_to_search_ns;
3515 double sec_downloaded = 0.0;
3516 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3517 if (desc_curr.start_time_ns == -1)
3519 *sec_to_download = 0.0;
3521 // Check for non cue start time.
3522 if (time_ns > desc_curr.start_time_ns) {
3523 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3524 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3525 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3526 double timeToDownload = (cueBytes * 8.0) / bps;
3528 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3529 *sec_to_download += timeToDownload;
3531 // Check if the search ends within the first cue.
3532 if (desc_curr.end_time_ns >= end_time_ns) {
3533 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3534 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3535 sec_downloaded = percent_to_sub * sec_downloaded;
3536 *sec_to_download = percent_to_sub * *sec_to_download;
3539 if ((sec_downloaded + *buffer) <= min_buffer) {
3543 // Get the next Cue.
3544 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3547 while (desc_curr.start_time_ns != -1) {
3548 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3549 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3550 double desc_sec = desc_ns / nano_seconds_per_second;
3551 double bits = (desc_bytes * 8.0);
3552 double time_to_download = bits / bps;
3554 sec_downloaded += desc_sec - time_to_download;
3555 *sec_to_download += time_to_download;
3557 if (desc_curr.end_time_ns >= end_time_ns) {
3558 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3559 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3560 sec_downloaded = percent_to_sub * sec_downloaded;
3561 *sec_to_download = percent_to_sub * *sec_to_download;
3563 if ((sec_downloaded + *buffer) <= min_buffer)
3568 if ((sec_downloaded + *buffer) <= min_buffer) {
3573 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3575 *buffer = *buffer + sec_downloaded;
3579 /* This function computes the bandwidth of the WebM file with the help of
3580 * buffer_size_after_time_downloaded() function. Both of these functions are
3581 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3582 * Matroska parsing mechanism.
3584 * Returns the bandwidth of the file on success; -1 on error.
3586 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3588 MatroskaDemuxContext *matroska = s->priv_data;
3589 AVStream *st = s->streams[0];
3590 double bandwidth = 0.0;
3593 for (i = 0; i < st->nb_index_entries; i++) {
3594 int64_t prebuffer_ns = 1000000000;
3595 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3596 double nano_seconds_per_second = 1000000000.0;
3597 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3598 double prebuffer_bytes = 0.0;
3599 int64_t temp_prebuffer_ns = prebuffer_ns;
3600 int64_t pre_bytes, pre_ns;
3601 double pre_sec, prebuffer, bits_per_second;
3602 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3604 // Start with the first Cue.
3605 CueDesc desc_end = desc_beg;
3607 // Figure out how much data we have downloaded for the prebuffer. This will
3608 // be used later to adjust the bits per sample to try.
3609 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3610 // Prebuffered the entire Cue.
3611 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3612 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3613 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3615 if (desc_end.start_time_ns == -1) {
3616 // The prebuffer is larger than the duration.
3617 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3619 bits_per_second = 0.0;
3621 // The prebuffer ends in the last Cue. Estimate how much data was
3623 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3624 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3625 pre_sec = pre_ns / nano_seconds_per_second;
3627 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3629 prebuffer = prebuffer_ns / nano_seconds_per_second;
3631 // Set this to 0.0 in case our prebuffer buffers the entire video.
3632 bits_per_second = 0.0;
3634 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3635 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3636 double desc_sec = desc_ns / nano_seconds_per_second;
3637 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3639 // Drop the bps by the percentage of bytes buffered.
3640 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3641 double mod_bits_per_second = calc_bits_per_second * percent;
3643 if (prebuffer < desc_sec) {
3645 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3647 // Add 1 so the bits per second should be a little bit greater than file
3649 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3650 const double min_buffer = 0.0;
3651 double buffer = prebuffer;
3652 double sec_to_download = 0.0;
3654 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3655 min_buffer, &buffer, &sec_to_download,
3659 } else if (rv == 0) {
3660 bits_per_second = (double)(bps);
3665 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3666 } while (desc_end.start_time_ns != -1);
3668 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3670 return (int64_t)bandwidth;
3673 static int webm_dash_manifest_cues(AVFormatContext *s)
3675 MatroskaDemuxContext *matroska = s->priv_data;
3676 EbmlList *seekhead_list = &matroska->seekhead;
3677 MatroskaSeekhead *seekhead = seekhead_list->elem;
3679 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3682 // determine cues start and end positions
3683 for (i = 0; i < seekhead_list->nb_elem; i++)
3684 if (seekhead[i].id == MATROSKA_ID_CUES)
3687 if (i >= seekhead_list->nb_elem) return -1;
3689 before_pos = avio_tell(matroska->ctx->pb);
3690 cues_start = seekhead[i].pos + matroska->segment_start;
3691 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3692 // cues_end is computed as cues_start + cues_length + length of the
3693 // Cues element ID + EBML length of the Cues element. cues_end is
3694 // inclusive and the above sum is reduced by 1.
3695 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3696 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3697 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3698 cues_end = cues_start + cues_length + bytes_read - 1;
3700 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3701 if (cues_start == -1 || cues_end == -1) return -1;
3704 matroska_parse_cues(matroska);
3707 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3710 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3713 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3714 if (bandwidth < 0) return -1;
3715 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3717 // check if all clusters start with key frames
3718 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3720 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3721 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3722 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3723 if (!buf) return -1;
3725 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3726 snprintf(buf, (i + 1) * 20 * sizeof(char),
3727 "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3728 if (i != s->streams[0]->nb_index_entries - 1)
3729 strncat(buf, ",", sizeof(char));
3731 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3737 static int webm_dash_manifest_read_header(AVFormatContext *s)
3740 int ret = matroska_read_header(s);
3741 MatroskaTrack *tracks;
3742 MatroskaDemuxContext *matroska = s->priv_data;
3744 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3748 if (!matroska->is_live) {
3749 buf = av_asprintf("%g", matroska->duration);
3750 if (!buf) return AVERROR(ENOMEM);
3751 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3754 // initialization range
3755 // 5 is the offset of Cluster ID.
3756 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3759 // basename of the file
3760 buf = strrchr(s->filename, '/');
3761 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3764 tracks = matroska->tracks.elem;
3765 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3767 // parse the cues and populate Cue related fields
3768 return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3771 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3776 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3777 static const AVOption options[] = {
3778 { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
3782 static const AVClass webm_dash_class = {
3783 .class_name = "WebM DASH Manifest demuxer",
3784 .item_name = av_default_item_name,
3786 .version = LIBAVUTIL_VERSION_INT,
3789 AVInputFormat ff_matroska_demuxer = {
3790 .name = "matroska,webm",
3791 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3792 .extensions = "mkv,mk3d,mka,mks",
3793 .priv_data_size = sizeof(MatroskaDemuxContext),
3794 .read_probe = matroska_probe,
3795 .read_header = matroska_read_header,
3796 .read_packet = matroska_read_packet,
3797 .read_close = matroska_read_close,
3798 .read_seek = matroska_read_seek,
3799 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3802 AVInputFormat ff_webm_dash_manifest_demuxer = {
3803 .name = "webm_dash_manifest",
3804 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3805 .priv_data_size = sizeof(MatroskaDemuxContext),
3806 .read_header = webm_dash_manifest_read_header,
3807 .read_packet = webm_dash_manifest_read_packet,
3808 .read_close = matroska_read_close,
3809 .priv_class = &webm_dash_class,