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;
171 uint64_t display_unit;
173 uint64_t field_order;
174 uint64_t stereo_mode;
176 MatroskaTrackVideoColor color;
177 } MatroskaTrackVideo;
179 typedef struct MatroskaTrackAudio {
181 double out_samplerate;
185 /* real audio header (extracted from extradata) */
192 uint64_t buf_timecode;
194 } MatroskaTrackAudio;
196 typedef struct MatroskaTrackPlane {
199 } MatroskaTrackPlane;
201 typedef struct MatroskaTrackOperation {
202 EbmlList combine_planes;
203 } MatroskaTrackOperation;
205 typedef struct MatroskaTrack {
214 uint64_t default_duration;
215 uint64_t flag_default;
216 uint64_t flag_forced;
217 uint64_t seek_preroll;
218 MatroskaTrackVideo video;
219 MatroskaTrackAudio audio;
220 MatroskaTrackOperation operation;
222 uint64_t codec_delay;
223 uint64_t codec_delay_in_track_tb;
226 int64_t end_timecode;
228 uint64_t max_block_additional_id;
230 uint32_t palette[AVPALETTE_COUNT];
234 typedef struct MatroskaAttachment {
241 } MatroskaAttachment;
243 typedef struct MatroskaChapter {
252 typedef struct MatroskaIndexPos {
257 typedef struct MatroskaIndex {
262 typedef struct MatroskaTag {
270 typedef struct MatroskaTagTarget {
278 typedef struct MatroskaTags {
279 MatroskaTagTarget target;
283 typedef struct MatroskaSeekhead {
288 typedef struct MatroskaLevel {
293 typedef struct MatroskaCluster {
298 typedef struct MatroskaLevel1Element {
302 } MatroskaLevel1Element;
304 typedef struct MatroskaDemuxContext {
305 const AVClass *class;
306 AVFormatContext *ctx;
310 MatroskaLevel levels[EBML_MAX_DEPTH];
320 EbmlList attachments;
326 /* byte position of the segment inside the stream */
327 int64_t segment_start;
329 /* the packet queue */
336 /* What to skip before effectively reading a packet. */
337 int skip_to_keyframe;
338 uint64_t skip_to_timecode;
340 /* File has a CUES element, but we defer parsing until it is needed. */
341 int cues_parsing_deferred;
343 /* Level1 elements and whether they were read yet */
344 MatroskaLevel1Element level1_elems[64];
345 int num_level1_elems;
347 int current_cluster_num_blocks;
348 int64_t current_cluster_pos;
349 MatroskaCluster current_cluster;
351 /* File has SSA subtitles which prevent incremental cluster parsing. */
354 /* WebM DASH Manifest live flag/ */
356 } MatroskaDemuxContext;
358 typedef struct MatroskaBlock {
363 uint64_t additional_id;
365 int64_t discard_padding;
368 static const EbmlSyntax ebml_header[] = {
369 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
370 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
371 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
372 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
373 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
374 { EBML_ID_EBMLVERSION, EBML_NONE },
375 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
379 static const EbmlSyntax ebml_syntax[] = {
380 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
384 static const EbmlSyntax matroska_info[] = {
385 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
386 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
387 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
388 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
389 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
390 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
391 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
395 static const EbmlSyntax matroska_mastering_meta[] = {
396 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
397 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
398 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
399 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
400 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
401 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
402 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
403 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
404 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
405 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
409 static const EbmlSyntax matroska_track_video_color[] = {
410 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
411 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
412 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
413 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
414 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
415 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
416 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
417 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
418 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
419 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
420 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
421 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
422 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
423 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
427 static const EbmlSyntax matroska_track_video[] = {
428 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
429 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
430 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
431 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
432 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
433 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
434 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
435 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
436 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
437 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
438 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
439 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
440 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
441 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
442 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
443 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
444 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
448 static const EbmlSyntax matroska_track_audio[] = {
449 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
450 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
451 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
452 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
456 static const EbmlSyntax matroska_track_encoding_compression[] = {
457 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
458 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
462 static const EbmlSyntax matroska_track_encoding_encryption[] = {
463 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
464 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
465 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
466 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
467 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
468 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
469 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
472 static const EbmlSyntax matroska_track_encoding[] = {
473 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
474 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
475 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
476 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
477 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
481 static const EbmlSyntax matroska_track_encodings[] = {
482 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
486 static const EbmlSyntax matroska_track_plane[] = {
487 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
488 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
492 static const EbmlSyntax matroska_track_combine_planes[] = {
493 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
497 static const EbmlSyntax matroska_track_operation[] = {
498 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
502 static const EbmlSyntax matroska_track[] = {
503 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
504 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
505 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
506 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
507 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
508 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
509 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
510 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
511 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
512 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
513 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
514 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
515 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
516 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
517 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
518 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
519 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
520 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
521 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
522 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
523 { MATROSKA_ID_CODECNAME, EBML_NONE },
524 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
525 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
526 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
527 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
528 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
532 static const EbmlSyntax matroska_tracks[] = {
533 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
537 static const EbmlSyntax matroska_attachment[] = {
538 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
539 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
540 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
541 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
542 { MATROSKA_ID_FILEDESC, EBML_NONE },
546 static const EbmlSyntax matroska_attachments[] = {
547 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
551 static const EbmlSyntax matroska_chapter_display[] = {
552 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
553 { MATROSKA_ID_CHAPLANG, EBML_NONE },
554 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
558 static const EbmlSyntax matroska_chapter_entry[] = {
559 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
560 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
561 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
562 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
563 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
564 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
565 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
566 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
570 static const EbmlSyntax matroska_chapter[] = {
571 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
572 { MATROSKA_ID_EDITIONUID, EBML_NONE },
573 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
574 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
575 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
579 static const EbmlSyntax matroska_chapters[] = {
580 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
584 static const EbmlSyntax matroska_index_pos[] = {
585 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
586 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
587 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
588 { MATROSKA_ID_CUEDURATION, EBML_NONE },
589 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
593 static const EbmlSyntax matroska_index_entry[] = {
594 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
595 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
599 static const EbmlSyntax matroska_index[] = {
600 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
604 static const EbmlSyntax matroska_simpletag[] = {
605 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
606 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
607 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
608 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
609 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
610 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
614 static const EbmlSyntax matroska_tagtargets[] = {
615 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
616 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
617 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
618 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
619 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
623 static const EbmlSyntax matroska_tag[] = {
624 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
625 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
629 static const EbmlSyntax matroska_tags[] = {
630 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
634 static const EbmlSyntax matroska_seekhead_entry[] = {
635 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
636 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
640 static const EbmlSyntax matroska_seekhead[] = {
641 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
645 static const EbmlSyntax matroska_segment[] = {
646 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
647 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
648 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
649 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
650 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
651 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
652 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
653 { MATROSKA_ID_CLUSTER, EBML_STOP },
657 static const EbmlSyntax matroska_segments[] = {
658 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
662 static const EbmlSyntax matroska_blockmore[] = {
663 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
664 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
668 static const EbmlSyntax matroska_blockadditions[] = {
669 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
673 static const EbmlSyntax matroska_blockgroup[] = {
674 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
675 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
676 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
677 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
678 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
679 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference) },
680 { MATROSKA_ID_CODECSTATE, EBML_NONE },
681 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
685 static const EbmlSyntax matroska_cluster[] = {
686 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
687 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
688 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
689 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
690 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
694 static const EbmlSyntax matroska_clusters[] = {
695 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
696 { MATROSKA_ID_INFO, EBML_NONE },
697 { MATROSKA_ID_CUES, EBML_NONE },
698 { MATROSKA_ID_TAGS, EBML_NONE },
699 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
703 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
704 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
705 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
706 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
707 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
708 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
709 { MATROSKA_ID_INFO, EBML_NONE },
710 { MATROSKA_ID_CUES, EBML_NONE },
711 { MATROSKA_ID_TAGS, EBML_NONE },
712 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
713 { MATROSKA_ID_CLUSTER, EBML_STOP },
717 static const EbmlSyntax matroska_cluster_incremental[] = {
718 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
719 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
720 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
721 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
722 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
726 static const EbmlSyntax matroska_clusters_incremental[] = {
727 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
728 { MATROSKA_ID_INFO, EBML_NONE },
729 { MATROSKA_ID_CUES, EBML_NONE },
730 { MATROSKA_ID_TAGS, EBML_NONE },
731 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
735 static const char *const matroska_doctypes[] = { "matroska", "webm" };
737 static int matroska_read_close(AVFormatContext *s);
739 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
741 AVIOContext *pb = matroska->ctx->pb;
744 matroska->current_id = 0;
745 matroska->num_levels = 0;
747 /* seek to next position to resync from */
748 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
755 // try to find a toplevel element
756 while (!avio_feof(pb)) {
757 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
758 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
759 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
760 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
761 matroska->current_id = id;
764 id = (id << 8) | avio_r8(pb);
772 * Return: Whether we reached the end of a level in the hierarchy or not.
774 static int ebml_level_end(MatroskaDemuxContext *matroska)
776 AVIOContext *pb = matroska->ctx->pb;
777 int64_t pos = avio_tell(pb);
779 if (matroska->num_levels > 0) {
780 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
781 if (pos - level->start >= level->length || matroska->current_id) {
782 matroska->num_levels--;
786 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
790 * Read: an "EBML number", which is defined as a variable-length
791 * array of bytes. The first byte indicates the length by giving a
792 * number of 0-bits followed by a one. The position of the first
793 * "one" bit inside the first byte indicates the length of this
795 * Returns: number of bytes read, < 0 on error
797 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
798 int max_size, uint64_t *number)
803 /* The first byte tells us the length in bytes - avio_r8() can normally
804 * return 0, but since that's not a valid first ebmlID byte, we can
805 * use it safely here to catch EOS. */
806 if (!(total = avio_r8(pb))) {
807 /* we might encounter EOS here */
808 if (!avio_feof(pb)) {
809 int64_t pos = avio_tell(pb);
810 av_log(matroska->ctx, AV_LOG_ERROR,
811 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
813 return pb->error ? pb->error : AVERROR(EIO);
818 /* get the length of the EBML number */
819 read = 8 - ff_log2_tab[total];
820 if (read > max_size) {
821 int64_t pos = avio_tell(pb) - 1;
822 av_log(matroska->ctx, AV_LOG_ERROR,
823 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
824 (uint8_t) total, pos, pos);
825 return AVERROR_INVALIDDATA;
828 /* read out length */
829 total ^= 1 << ff_log2_tab[total];
831 total = (total << 8) | avio_r8(pb);
839 * Read a EBML length value.
840 * This needs special handling for the "unknown length" case which has multiple
843 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
846 int res = ebml_read_num(matroska, pb, 8, number);
847 if (res > 0 && *number + 1 == 1ULL << (7 * res))
848 *number = 0xffffffffffffffULL;
853 * Read the next element as an unsigned int.
854 * 0 is success, < 0 is failure.
856 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
861 return AVERROR_INVALIDDATA;
863 /* big-endian ordering; build up number */
866 *num = (*num << 8) | avio_r8(pb);
872 * Read the next element as a signed int.
873 * 0 is success, < 0 is failure.
875 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
880 return AVERROR_INVALIDDATA;
885 *num = sign_extend(avio_r8(pb), 8);
887 /* big-endian ordering; build up number */
889 *num = ((uint64_t)*num << 8) | avio_r8(pb);
896 * Read the next element as a float.
897 * 0 is success, < 0 is failure.
899 static int ebml_read_float(AVIOContext *pb, int size, double *num)
904 *num = av_int2float(avio_rb32(pb));
906 *num = av_int2double(avio_rb64(pb));
908 return AVERROR_INVALIDDATA;
914 * Read the next element as an ASCII string.
915 * 0 is success, < 0 is failure.
917 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
921 /* EBML strings are usually not 0-terminated, so we allocate one
922 * byte more, read the string and NULL-terminate it ourselves. */
923 if (!(res = av_malloc(size + 1)))
924 return AVERROR(ENOMEM);
925 if (avio_read(pb, (uint8_t *) res, size) != size) {
937 * Read the next element as binary data.
938 * 0 is success, < 0 is failure.
940 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
942 av_fast_padded_malloc(&bin->data, &bin->size, length);
944 return AVERROR(ENOMEM);
947 bin->pos = avio_tell(pb);
948 if (avio_read(pb, bin->data, length) != length) {
949 av_freep(&bin->data);
958 * Read the next element, but only the header. The contents
959 * are supposed to be sub-elements which can be read separately.
960 * 0 is success, < 0 is failure.
962 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
964 AVIOContext *pb = matroska->ctx->pb;
965 MatroskaLevel *level;
967 if (matroska->num_levels >= EBML_MAX_DEPTH) {
968 av_log(matroska->ctx, AV_LOG_ERROR,
969 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
970 return AVERROR(ENOSYS);
973 level = &matroska->levels[matroska->num_levels++];
974 level->start = avio_tell(pb);
975 level->length = length;
981 * Read signed/unsigned "EBML" numbers.
982 * Return: number of bytes processed, < 0 on error
984 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
985 uint8_t *data, uint32_t size, uint64_t *num)
988 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
989 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
993 * Same as above, but signed.
995 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
996 uint8_t *data, uint32_t size, int64_t *num)
1001 /* read as unsigned number first */
1002 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1005 /* make signed (weird way) */
1006 *num = unum - ((1LL << (7 * res - 1)) - 1);
1011 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1012 EbmlSyntax *syntax, void *data);
1014 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1015 uint32_t id, void *data)
1018 for (i = 0; syntax[i].id; i++)
1019 if (id == syntax[i].id)
1021 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1022 matroska->num_levels > 0 &&
1023 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1024 return 0; // we reached the end of an unknown size cluster
1025 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1026 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1028 return ebml_parse_elem(matroska, &syntax[i], data);
1031 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1034 if (!matroska->current_id) {
1036 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1038 // in live mode, finish parsing if EOF is reached.
1039 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1040 res == AVERROR_EOF) ? 1 : res;
1042 matroska->current_id = id | 1 << 7 * res;
1044 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1047 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1052 for (i = 0; syntax[i].id; i++)
1053 switch (syntax[i].type) {
1055 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1058 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1062 // the default may be NULL
1063 if (syntax[i].def.s) {
1064 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1065 *dst = av_strdup(syntax[i].def.s);
1067 return AVERROR(ENOMEM);
1072 while (!res && !ebml_level_end(matroska))
1073 res = ebml_parse(matroska, syntax, data);
1078 static int is_ebml_id_valid(uint32_t id)
1080 // Due to endian nonsense in Matroska, the highest byte with any bits set
1081 // will contain the leading length bit. This bit in turn identifies the
1082 // total byte length of the element by its position within the byte.
1083 unsigned int bits = av_log2(id);
1084 return id && (bits + 7) / 8 == (8 - bits % 8);
1088 * Allocate and return the entry for the level1 element with the given ID. If
1089 * an entry already exists, return the existing entry.
1091 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1095 MatroskaLevel1Element *elem;
1097 if (!is_ebml_id_valid(id))
1100 // Some files link to all clusters; useless.
1101 if (id == MATROSKA_ID_CLUSTER)
1104 // There can be multiple seekheads.
1105 if (id != MATROSKA_ID_SEEKHEAD) {
1106 for (i = 0; i < matroska->num_level1_elems; i++) {
1107 if (matroska->level1_elems[i].id == id)
1108 return &matroska->level1_elems[i];
1112 // Only a completely broken file would have more elements.
1113 // It also provides a low-effort way to escape from circular seekheads
1114 // (every iteration will add a level1 entry).
1115 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1116 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1120 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1121 *elem = (MatroskaLevel1Element){.id = id};
1126 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1127 EbmlSyntax *syntax, void *data)
1129 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1132 // max. 16 MB for strings
1133 [EBML_STR] = 0x1000000,
1134 [EBML_UTF8] = 0x1000000,
1135 // max. 256 MB for binary data
1136 [EBML_BIN] = 0x10000000,
1137 // no limits for anything else
1139 AVIOContext *pb = matroska->ctx->pb;
1140 uint32_t id = syntax->id;
1144 MatroskaLevel1Element *level1_elem;
1146 data = (char *) data + syntax->data_offset;
1147 if (syntax->list_elem_size) {
1148 EbmlList *list = data;
1149 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1151 return AVERROR(ENOMEM);
1152 list->elem = newelem;
1153 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1154 memset(data, 0, syntax->list_elem_size);
1158 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1159 matroska->current_id = 0;
1160 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1162 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1163 av_log(matroska->ctx, AV_LOG_ERROR,
1164 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1165 length, max_lengths[syntax->type], syntax->type);
1166 return AVERROR_INVALIDDATA;
1170 switch (syntax->type) {
1172 res = ebml_read_uint(pb, length, data);
1175 res = ebml_read_sint(pb, length, data);
1178 res = ebml_read_float(pb, length, data);
1182 res = ebml_read_ascii(pb, length, data);
1185 res = ebml_read_binary(pb, length, data);
1189 if ((res = ebml_read_master(matroska, length)) < 0)
1191 if (id == MATROSKA_ID_SEGMENT)
1192 matroska->segment_start = avio_tell(matroska->ctx->pb);
1193 if (id == MATROSKA_ID_CUES)
1194 matroska->cues_parsing_deferred = 0;
1195 if (syntax->type == EBML_LEVEL1 &&
1196 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1197 if (level1_elem->parsed)
1198 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1199 level1_elem->parsed = 1;
1201 return ebml_parse_nest(matroska, syntax->def.n, data);
1203 return ebml_parse_id(matroska, syntax->def.n, id, data);
1207 if (ffio_limit(pb, length) != length)
1208 return AVERROR(EIO);
1209 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1211 if (res == AVERROR_INVALIDDATA)
1212 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1213 else if (res == AVERROR(EIO))
1214 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1218 static void ebml_free(EbmlSyntax *syntax, void *data)
1221 for (i = 0; syntax[i].id; i++) {
1222 void *data_off = (char *) data + syntax[i].data_offset;
1223 switch (syntax[i].type) {
1229 av_freep(&((EbmlBin *) data_off)->data);
1233 if (syntax[i].list_elem_size) {
1234 EbmlList *list = data_off;
1235 char *ptr = list->elem;
1236 for (j = 0; j < list->nb_elem;
1237 j++, ptr += syntax[i].list_elem_size)
1238 ebml_free(syntax[i].def.n, ptr);
1239 av_freep(&list->elem);
1242 ebml_free(syntax[i].def.n, data_off);
1252 static int matroska_probe(AVProbeData *p)
1255 int len_mask = 0x80, size = 1, n = 1, i;
1258 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1261 /* length of header */
1263 while (size <= 8 && !(total & len_mask)) {
1269 total &= (len_mask - 1);
1271 total = (total << 8) | p->buf[4 + n++];
1273 /* Does the probe data contain the whole header? */
1274 if (p->buf_size < 4 + size + total)
1277 /* The header should contain a known document type. For now,
1278 * we don't parse the whole header but simply check for the
1279 * availability of that array of characters inside the header.
1280 * Not fully fool-proof, but good enough. */
1281 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1282 size_t probelen = strlen(matroska_doctypes[i]);
1283 if (total < probelen)
1285 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1286 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1287 return AVPROBE_SCORE_MAX;
1290 // probably valid EBML header but no recognized doctype
1291 return AVPROBE_SCORE_EXTENSION;
1294 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1297 MatroskaTrack *tracks = matroska->tracks.elem;
1300 for (i = 0; i < matroska->tracks.nb_elem; i++)
1301 if (tracks[i].num == num)
1304 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1308 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1309 MatroskaTrack *track)
1311 MatroskaTrackEncoding *encodings = track->encodings.elem;
1312 uint8_t *data = *buf;
1313 int isize = *buf_size;
1314 uint8_t *pkt_data = NULL;
1315 uint8_t av_unused *newpktdata;
1316 int pkt_size = isize;
1320 if (pkt_size >= 10000000U)
1321 return AVERROR_INVALIDDATA;
1323 switch (encodings[0].compression.algo) {
1324 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1326 int header_size = encodings[0].compression.settings.size;
1327 uint8_t *header = encodings[0].compression.settings.data;
1329 if (header_size && !header) {
1330 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1337 pkt_size = isize + header_size;
1338 pkt_data = av_malloc(pkt_size);
1340 return AVERROR(ENOMEM);
1342 memcpy(pkt_data, header, header_size);
1343 memcpy(pkt_data + header_size, data, isize);
1347 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1349 olen = pkt_size *= 3;
1350 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1352 result = AVERROR(ENOMEM);
1355 pkt_data = newpktdata;
1356 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1357 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1359 result = AVERROR_INVALIDDATA;
1366 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1368 z_stream zstream = { 0 };
1369 if (inflateInit(&zstream) != Z_OK)
1371 zstream.next_in = data;
1372 zstream.avail_in = isize;
1375 newpktdata = av_realloc(pkt_data, pkt_size);
1377 inflateEnd(&zstream);
1378 result = AVERROR(ENOMEM);
1381 pkt_data = newpktdata;
1382 zstream.avail_out = pkt_size - zstream.total_out;
1383 zstream.next_out = pkt_data + zstream.total_out;
1384 result = inflate(&zstream, Z_NO_FLUSH);
1385 } while (result == Z_OK && pkt_size < 10000000);
1386 pkt_size = zstream.total_out;
1387 inflateEnd(&zstream);
1388 if (result != Z_STREAM_END) {
1389 if (result == Z_MEM_ERROR)
1390 result = AVERROR(ENOMEM);
1392 result = AVERROR_INVALIDDATA;
1399 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1401 bz_stream bzstream = { 0 };
1402 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1404 bzstream.next_in = data;
1405 bzstream.avail_in = isize;
1408 newpktdata = av_realloc(pkt_data, pkt_size);
1410 BZ2_bzDecompressEnd(&bzstream);
1411 result = AVERROR(ENOMEM);
1414 pkt_data = newpktdata;
1415 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1416 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1417 result = BZ2_bzDecompress(&bzstream);
1418 } while (result == BZ_OK && pkt_size < 10000000);
1419 pkt_size = bzstream.total_out_lo32;
1420 BZ2_bzDecompressEnd(&bzstream);
1421 if (result != BZ_STREAM_END) {
1422 if (result == BZ_MEM_ERROR)
1423 result = AVERROR(ENOMEM);
1425 result = AVERROR_INVALIDDATA;
1432 return AVERROR_INVALIDDATA;
1436 *buf_size = pkt_size;
1444 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1445 AVDictionary **metadata, char *prefix)
1447 MatroskaTag *tags = list->elem;
1451 for (i = 0; i < list->nb_elem; i++) {
1452 const char *lang = tags[i].lang &&
1453 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1455 if (!tags[i].name) {
1456 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1460 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1462 av_strlcpy(key, tags[i].name, sizeof(key));
1463 if (tags[i].def || !lang) {
1464 av_dict_set(metadata, key, tags[i].string, 0);
1465 if (tags[i].sub.nb_elem)
1466 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1469 av_strlcat(key, "-", sizeof(key));
1470 av_strlcat(key, lang, sizeof(key));
1471 av_dict_set(metadata, key, tags[i].string, 0);
1472 if (tags[i].sub.nb_elem)
1473 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1476 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1479 static void matroska_convert_tags(AVFormatContext *s)
1481 MatroskaDemuxContext *matroska = s->priv_data;
1482 MatroskaTags *tags = matroska->tags.elem;
1485 for (i = 0; i < matroska->tags.nb_elem; i++) {
1486 if (tags[i].target.attachuid) {
1487 MatroskaAttachment *attachment = matroska->attachments.elem;
1489 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1490 if (attachment[j].uid == tags[i].target.attachuid &&
1491 attachment[j].stream) {
1492 matroska_convert_tag(s, &tags[i].tag,
1493 &attachment[j].stream->metadata, NULL);
1498 av_log(NULL, AV_LOG_WARNING,
1499 "The tags at index %d refer to a "
1500 "non-existent attachment %"PRId64".\n",
1501 i, tags[i].target.attachuid);
1503 } else if (tags[i].target.chapteruid) {
1504 MatroskaChapter *chapter = matroska->chapters.elem;
1506 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1507 if (chapter[j].uid == tags[i].target.chapteruid &&
1508 chapter[j].chapter) {
1509 matroska_convert_tag(s, &tags[i].tag,
1510 &chapter[j].chapter->metadata, NULL);
1515 av_log(NULL, AV_LOG_WARNING,
1516 "The tags at index %d refer to a non-existent chapter "
1518 i, tags[i].target.chapteruid);
1520 } else if (tags[i].target.trackuid) {
1521 MatroskaTrack *track = matroska->tracks.elem;
1523 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1524 if (track[j].uid == tags[i].target.trackuid &&
1526 matroska_convert_tag(s, &tags[i].tag,
1527 &track[j].stream->metadata, NULL);
1532 av_log(NULL, AV_LOG_WARNING,
1533 "The tags at index %d refer to a non-existent track "
1535 i, tags[i].target.trackuid);
1538 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1539 tags[i].target.type);
1544 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1547 uint32_t level_up = matroska->level_up;
1548 uint32_t saved_id = matroska->current_id;
1549 int64_t before_pos = avio_tell(matroska->ctx->pb);
1550 MatroskaLevel level;
1555 offset = pos + matroska->segment_start;
1556 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1557 /* We don't want to lose our seekhead level, so we add
1558 * a dummy. This is a crude hack. */
1559 if (matroska->num_levels == EBML_MAX_DEPTH) {
1560 av_log(matroska->ctx, AV_LOG_INFO,
1561 "Max EBML element depth (%d) reached, "
1562 "cannot parse further.\n", EBML_MAX_DEPTH);
1563 ret = AVERROR_INVALIDDATA;
1566 level.length = (uint64_t) -1;
1567 matroska->levels[matroska->num_levels] = level;
1568 matroska->num_levels++;
1569 matroska->current_id = 0;
1571 ret = ebml_parse(matroska, matroska_segment, matroska);
1573 /* remove dummy level */
1574 while (matroska->num_levels) {
1575 uint64_t length = matroska->levels[--matroska->num_levels].length;
1576 if (length == (uint64_t) -1)
1582 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1583 matroska->level_up = level_up;
1584 matroska->current_id = saved_id;
1589 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1591 EbmlList *seekhead_list = &matroska->seekhead;
1594 // we should not do any seeking in the streaming case
1595 if (!matroska->ctx->pb->seekable)
1598 for (i = 0; i < seekhead_list->nb_elem; i++) {
1599 MatroskaSeekhead *seekheads = seekhead_list->elem;
1600 uint32_t id = seekheads[i].id;
1601 uint64_t pos = seekheads[i].pos;
1603 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1604 if (!elem || elem->parsed)
1609 // defer cues parsing until we actually need cue data.
1610 if (id == MATROSKA_ID_CUES)
1613 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1614 // mark index as broken
1615 matroska->cues_parsing_deferred = -1;
1623 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1625 EbmlList *index_list;
1626 MatroskaIndex *index;
1627 uint64_t index_scale = 1;
1630 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1633 index_list = &matroska->index;
1634 index = index_list->elem;
1635 if (index_list->nb_elem < 2)
1637 if (index[1].time > 1E14 / matroska->time_scale) {
1638 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1641 for (i = 0; i < index_list->nb_elem; i++) {
1642 EbmlList *pos_list = &index[i].pos;
1643 MatroskaIndexPos *pos = pos_list->elem;
1644 for (j = 0; j < pos_list->nb_elem; j++) {
1645 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1647 if (track && track->stream)
1648 av_add_index_entry(track->stream,
1649 pos[j].pos + matroska->segment_start,
1650 index[i].time / index_scale, 0, 0,
1656 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1659 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1662 for (i = 0; i < matroska->num_level1_elems; i++) {
1663 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1664 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1665 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1666 matroska->cues_parsing_deferred = -1;
1672 matroska_add_index_entries(matroska);
1675 static int matroska_aac_profile(char *codec_id)
1677 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1680 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1681 if (strstr(codec_id, aac_profiles[profile]))
1686 static int matroska_aac_sri(int samplerate)
1690 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1691 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1696 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1698 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1699 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1702 static int matroska_parse_flac(AVFormatContext *s,
1703 MatroskaTrack *track,
1706 AVStream *st = track->stream;
1707 uint8_t *p = track->codec_priv.data;
1708 int size = track->codec_priv.size;
1710 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1711 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1712 track->codec_priv.size = 0;
1716 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1718 p += track->codec_priv.size;
1719 size -= track->codec_priv.size;
1721 /* parse the remaining metadata blocks if present */
1723 int block_last, block_type, block_size;
1725 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1729 if (block_size > size)
1732 /* check for the channel mask */
1733 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1734 AVDictionary *dict = NULL;
1735 AVDictionaryEntry *chmask;
1737 ff_vorbis_comment(s, &dict, p, block_size, 0);
1738 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1740 uint64_t mask = strtol(chmask->value, NULL, 0);
1741 if (!mask || mask & ~0x3ffffULL) {
1742 av_log(s, AV_LOG_WARNING,
1743 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1745 st->codecpar->channel_layout = mask;
1747 av_dict_free(&dict);
1757 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1759 int major, minor, micro, bttb = 0;
1761 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1762 * this function, and fixed in 57.52 */
1763 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1764 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1766 switch (field_order) {
1767 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1768 return AV_FIELD_PROGRESSIVE;
1769 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1770 return AV_FIELD_UNKNOWN;
1771 case MATROSKA_VIDEO_FIELDORDER_TT:
1773 case MATROSKA_VIDEO_FIELDORDER_BB:
1775 case MATROSKA_VIDEO_FIELDORDER_BT:
1776 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1777 case MATROSKA_VIDEO_FIELDORDER_TB:
1778 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1780 return AV_FIELD_UNKNOWN;
1784 static void mkv_stereo_mode_display_mul(int stereo_mode,
1785 int *h_width, int *h_height)
1787 switch (stereo_mode) {
1788 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1789 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1790 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1791 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1792 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1794 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1795 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1796 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1797 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1800 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1801 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1802 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1803 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1809 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1810 const MatroskaMasteringMeta* mastering_meta =
1811 &track->video.color.mastering_meta;
1812 // Mastering primaries are CIE 1931 coords, and must be > 0.
1813 const int has_mastering_primaries =
1814 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1815 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1816 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1817 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1818 const int has_mastering_luminance = mastering_meta->max_luminance > 0;
1820 if (track->video.color.matrix_coefficients != AVCOL_SPC_RESERVED)
1821 st->codecpar->color_space = track->video.color.matrix_coefficients;
1822 if (track->video.color.primaries != AVCOL_PRI_RESERVED &&
1823 track->video.color.primaries != AVCOL_PRI_RESERVED0)
1824 st->codecpar->color_primaries = track->video.color.primaries;
1825 if (track->video.color.transfer_characteristics != AVCOL_TRC_RESERVED &&
1826 track->video.color.transfer_characteristics != AVCOL_TRC_RESERVED0)
1827 st->codecpar->color_trc = track->video.color.transfer_characteristics;
1828 if (track->video.color.range != AVCOL_RANGE_UNSPECIFIED &&
1829 track->video.color.range <= AVCOL_RANGE_JPEG)
1830 st->codecpar->color_range = track->video.color.range;
1831 if (track->video.color.chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1832 track->video.color.chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1833 track->video.color.chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1834 track->video.color.chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1835 st->codecpar->chroma_location =
1836 avcodec_chroma_pos_to_enum((track->video.color.chroma_siting_horz - 1) << 7,
1837 (track->video.color.chroma_siting_vert - 1) << 7);
1840 if (has_mastering_primaries || has_mastering_luminance) {
1841 // Use similar rationals as other standards.
1842 const int chroma_den = 50000;
1843 const int luma_den = 10000;
1844 AVMasteringDisplayMetadata *metadata =
1845 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1846 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1847 sizeof(AVMasteringDisplayMetadata));
1849 return AVERROR(ENOMEM);
1851 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1852 if (has_mastering_primaries) {
1853 metadata->display_primaries[0][0] = av_make_q(
1854 round(mastering_meta->r_x * chroma_den), chroma_den);
1855 metadata->display_primaries[0][1] = av_make_q(
1856 round(mastering_meta->r_y * chroma_den), chroma_den);
1857 metadata->display_primaries[1][0] = av_make_q(
1858 round(mastering_meta->g_x * chroma_den), chroma_den);
1859 metadata->display_primaries[1][1] = av_make_q(
1860 round(mastering_meta->g_y * chroma_den), chroma_den);
1861 metadata->display_primaries[2][0] = av_make_q(
1862 round(mastering_meta->b_x * chroma_den), chroma_den);
1863 metadata->display_primaries[2][1] = av_make_q(
1864 round(mastering_meta->b_y * chroma_den), chroma_den);
1865 metadata->white_point[0] = av_make_q(
1866 round(mastering_meta->white_x * chroma_den), chroma_den);
1867 metadata->white_point[1] = av_make_q(
1868 round(mastering_meta->white_y * chroma_den), chroma_den);
1869 metadata->has_primaries = 1;
1871 if (has_mastering_luminance) {
1872 metadata->max_luminance = av_make_q(
1873 round(mastering_meta->max_luminance * luma_den), luma_den);
1874 metadata->min_luminance = av_make_q(
1875 round(mastering_meta->min_luminance * luma_den), luma_den);
1876 metadata->has_luminance = 1;
1882 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
1884 const AVCodecTag *codec_tags;
1886 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
1887 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
1889 /* Normalize noncompliant private data that starts with the fourcc
1890 * by expanding/shifting the data by 4 bytes and storing the data
1891 * size at the start. */
1892 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
1893 uint8_t *p = av_realloc(track->codec_priv.data,
1894 track->codec_priv.size + 4);
1896 return AVERROR(ENOMEM);
1897 memmove(p + 4, p, track->codec_priv.size);
1898 track->codec_priv.data = p;
1899 track->codec_priv.size += 4;
1900 AV_WB32(track->codec_priv.data, track->codec_priv.size);
1903 *fourcc = AV_RL32(track->codec_priv.data + 4);
1904 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
1909 static int matroska_parse_tracks(AVFormatContext *s)
1911 MatroskaDemuxContext *matroska = s->priv_data;
1912 MatroskaTrack *tracks = matroska->tracks.elem;
1917 for (i = 0; i < matroska->tracks.nb_elem; i++) {
1918 MatroskaTrack *track = &tracks[i];
1919 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
1920 EbmlList *encodings_list = &track->encodings;
1921 MatroskaTrackEncoding *encodings = encodings_list->elem;
1922 uint8_t *extradata = NULL;
1923 int extradata_size = 0;
1924 int extradata_offset = 0;
1925 uint32_t fourcc = 0;
1927 char* key_id_base64 = NULL;
1930 /* Apply some sanity checks. */
1931 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1932 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1933 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
1934 track->type != MATROSKA_TRACK_TYPE_METADATA) {
1935 av_log(matroska->ctx, AV_LOG_INFO,
1936 "Unknown or unsupported track type %"PRIu64"\n",
1940 if (!track->codec_id)
1943 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
1944 isnan(track->audio.samplerate)) {
1945 av_log(matroska->ctx, AV_LOG_WARNING,
1946 "Invalid sample rate %f, defaulting to 8000 instead.\n",
1947 track->audio.samplerate);
1948 track->audio.samplerate = 8000;
1951 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1952 if (!track->default_duration && track->video.frame_rate > 0)
1953 track->default_duration = 1000000000 / track->video.frame_rate;
1954 if (track->video.display_width == -1)
1955 track->video.display_width = track->video.pixel_width;
1956 if (track->video.display_height == -1)
1957 track->video.display_height = track->video.pixel_height;
1958 if (track->video.color_space.size == 4)
1959 fourcc = AV_RL32(track->video.color_space.data);
1960 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1961 if (!track->audio.out_samplerate)
1962 track->audio.out_samplerate = track->audio.samplerate;
1964 if (encodings_list->nb_elem > 1) {
1965 av_log(matroska->ctx, AV_LOG_ERROR,
1966 "Multiple combined encodings not supported");
1967 } else if (encodings_list->nb_elem == 1) {
1968 if (encodings[0].type) {
1969 if (encodings[0].encryption.key_id.size > 0) {
1970 /* Save the encryption key id to be stored later as a
1972 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
1973 key_id_base64 = av_malloc(b64_size);
1974 if (key_id_base64 == NULL)
1975 return AVERROR(ENOMEM);
1977 av_base64_encode(key_id_base64, b64_size,
1978 encodings[0].encryption.key_id.data,
1979 encodings[0].encryption.key_id.size);
1981 encodings[0].scope = 0;
1982 av_log(matroska->ctx, AV_LOG_ERROR,
1983 "Unsupported encoding type");
1987 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1990 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1993 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
1995 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
1996 encodings[0].scope = 0;
1997 av_log(matroska->ctx, AV_LOG_ERROR,
1998 "Unsupported encoding type");
1999 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2000 uint8_t *codec_priv = track->codec_priv.data;
2001 int ret = matroska_decode_buffer(&track->codec_priv.data,
2002 &track->codec_priv.size,
2005 track->codec_priv.data = NULL;
2006 track->codec_priv.size = 0;
2007 av_log(matroska->ctx, AV_LOG_ERROR,
2008 "Failed to decode codec private data\n");
2011 if (codec_priv != track->codec_priv.data)
2012 av_free(codec_priv);
2016 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2017 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2018 strlen(ff_mkv_codec_tags[j].str))) {
2019 codec_id = ff_mkv_codec_tags[j].id;
2024 st = track->stream = avformat_new_stream(s, NULL);
2026 av_free(key_id_base64);
2027 return AVERROR(ENOMEM);
2030 if (key_id_base64) {
2031 /* export encryption key id as base64 metadata tag */
2032 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2033 av_freep(&key_id_base64);
2036 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2037 track->codec_priv.size >= 40 &&
2038 track->codec_priv.data) {
2039 track->ms_compat = 1;
2040 bit_depth = AV_RL16(track->codec_priv.data + 14);
2041 fourcc = AV_RL32(track->codec_priv.data + 16);
2042 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2045 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2047 extradata_offset = 40;
2048 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2049 track->codec_priv.size >= 14 &&
2050 track->codec_priv.data) {
2052 ffio_init_context(&b, track->codec_priv.data,
2053 track->codec_priv.size,
2054 0, NULL, NULL, NULL, NULL);
2055 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2058 codec_id = st->codecpar->codec_id;
2059 fourcc = st->codecpar->codec_tag;
2060 extradata_offset = FFMIN(track->codec_priv.size, 18);
2061 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2062 /* Normally 36, but allow noncompliant private data */
2063 && (track->codec_priv.size >= 32)
2064 && (track->codec_priv.data)) {
2065 uint16_t sample_size;
2066 int ret = get_qt_codec(track, &fourcc, &codec_id);
2069 sample_size = AV_RB16(track->codec_priv.data + 26);
2071 if (sample_size == 8) {
2072 fourcc = MKTAG('r','a','w',' ');
2073 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2074 } else if (sample_size == 16) {
2075 fourcc = MKTAG('t','w','o','s');
2076 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2079 if ((fourcc == MKTAG('t','w','o','s') ||
2080 fourcc == MKTAG('s','o','w','t')) &&
2082 codec_id = AV_CODEC_ID_PCM_S8;
2083 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2084 (track->codec_priv.size >= 21) &&
2085 (track->codec_priv.data)) {
2086 int ret = get_qt_codec(track, &fourcc, &codec_id);
2089 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2090 fourcc = MKTAG('S','V','Q','3');
2091 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2093 if (codec_id == AV_CODEC_ID_NONE) {
2095 av_get_codec_tag_string(buf, sizeof(buf), fourcc);
2096 av_log(matroska->ctx, AV_LOG_ERROR,
2097 "mov FourCC not found %s.\n", buf);
2099 if (track->codec_priv.size >= 86) {
2100 bit_depth = AV_RB16(track->codec_priv.data + 82);
2101 ffio_init_context(&b, track->codec_priv.data,
2102 track->codec_priv.size,
2103 0, NULL, NULL, NULL, NULL);
2104 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2106 track->has_palette = 1;
2109 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2110 switch (track->audio.bitdepth) {
2112 codec_id = AV_CODEC_ID_PCM_U8;
2115 codec_id = AV_CODEC_ID_PCM_S24BE;
2118 codec_id = AV_CODEC_ID_PCM_S32BE;
2121 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2122 switch (track->audio.bitdepth) {
2124 codec_id = AV_CODEC_ID_PCM_U8;
2127 codec_id = AV_CODEC_ID_PCM_S24LE;
2130 codec_id = AV_CODEC_ID_PCM_S32LE;
2133 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2134 track->audio.bitdepth == 64) {
2135 codec_id = AV_CODEC_ID_PCM_F64LE;
2136 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2137 int profile = matroska_aac_profile(track->codec_id);
2138 int sri = matroska_aac_sri(track->audio.samplerate);
2139 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2141 return AVERROR(ENOMEM);
2142 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2143 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2144 if (strstr(track->codec_id, "SBR")) {
2145 sri = matroska_aac_sri(track->audio.out_samplerate);
2146 extradata[2] = 0x56;
2147 extradata[3] = 0xE5;
2148 extradata[4] = 0x80 | (sri << 3);
2152 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2153 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2154 * Create the "atom size", "tag", and "tag version" fields the
2155 * decoder expects manually. */
2156 extradata_size = 12 + track->codec_priv.size;
2157 extradata = av_mallocz(extradata_size +
2158 AV_INPUT_BUFFER_PADDING_SIZE);
2160 return AVERROR(ENOMEM);
2161 AV_WB32(extradata, extradata_size);
2162 memcpy(&extradata[4], "alac", 4);
2163 AV_WB32(&extradata[8], 0);
2164 memcpy(&extradata[12], track->codec_priv.data,
2165 track->codec_priv.size);
2166 } else if (codec_id == AV_CODEC_ID_TTA) {
2167 extradata_size = 30;
2168 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2170 return AVERROR(ENOMEM);
2171 ffio_init_context(&b, extradata, extradata_size, 1,
2172 NULL, NULL, NULL, NULL);
2173 avio_write(&b, "TTA1", 4);
2175 if (track->audio.channels > UINT16_MAX ||
2176 track->audio.bitdepth > UINT16_MAX) {
2177 av_log(matroska->ctx, AV_LOG_WARNING,
2178 "Too large audio channel number %"PRIu64
2179 " or bitdepth %"PRIu64". Skipping track.\n",
2180 track->audio.channels, track->audio.bitdepth);
2181 av_freep(&extradata);
2182 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2183 return AVERROR_INVALIDDATA;
2187 avio_wl16(&b, track->audio.channels);
2188 avio_wl16(&b, track->audio.bitdepth);
2189 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2190 return AVERROR_INVALIDDATA;
2191 avio_wl32(&b, track->audio.out_samplerate);
2192 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2193 track->audio.out_samplerate,
2194 AV_TIME_BASE * 1000));
2195 } else if (codec_id == AV_CODEC_ID_RV10 ||
2196 codec_id == AV_CODEC_ID_RV20 ||
2197 codec_id == AV_CODEC_ID_RV30 ||
2198 codec_id == AV_CODEC_ID_RV40) {
2199 extradata_offset = 26;
2200 } else if (codec_id == AV_CODEC_ID_RA_144) {
2201 track->audio.out_samplerate = 8000;
2202 track->audio.channels = 1;
2203 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2204 codec_id == AV_CODEC_ID_COOK ||
2205 codec_id == AV_CODEC_ID_ATRAC3 ||
2206 codec_id == AV_CODEC_ID_SIPR)
2207 && track->codec_priv.data) {
2210 ffio_init_context(&b, track->codec_priv.data,
2211 track->codec_priv.size,
2212 0, NULL, NULL, NULL, NULL);
2214 flavor = avio_rb16(&b);
2215 track->audio.coded_framesize = avio_rb32(&b);
2217 track->audio.sub_packet_h = avio_rb16(&b);
2218 track->audio.frame_size = avio_rb16(&b);
2219 track->audio.sub_packet_size = avio_rb16(&b);
2221 track->audio.coded_framesize <= 0 ||
2222 track->audio.sub_packet_h <= 0 ||
2223 track->audio.frame_size <= 0 ||
2224 track->audio.sub_packet_size <= 0)
2225 return AVERROR_INVALIDDATA;
2226 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2227 track->audio.frame_size);
2228 if (!track->audio.buf)
2229 return AVERROR(ENOMEM);
2230 if (codec_id == AV_CODEC_ID_RA_288) {
2231 st->codecpar->block_align = track->audio.coded_framesize;
2232 track->codec_priv.size = 0;
2234 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2235 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2236 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2237 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2239 st->codecpar->block_align = track->audio.sub_packet_size;
2240 extradata_offset = 78;
2242 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2243 ret = matroska_parse_flac(s, track, &extradata_offset);
2246 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2247 fourcc = AV_RL32(track->codec_priv.data);
2249 track->codec_priv.size -= extradata_offset;
2251 if (codec_id == AV_CODEC_ID_NONE)
2252 av_log(matroska->ctx, AV_LOG_INFO,
2253 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2255 if (track->time_scale < 0.01)
2256 track->time_scale = 1.0;
2257 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2258 1000 * 1000 * 1000); /* 64 bit pts in ns */
2260 /* convert the delay from ns to the track timebase */
2261 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2262 (AVRational){ 1, 1000000000 },
2265 st->codecpar->codec_id = codec_id;
2267 if (strcmp(track->language, "und"))
2268 av_dict_set(&st->metadata, "language", track->language, 0);
2269 av_dict_set(&st->metadata, "title", track->name, 0);
2271 if (track->flag_default)
2272 st->disposition |= AV_DISPOSITION_DEFAULT;
2273 if (track->flag_forced)
2274 st->disposition |= AV_DISPOSITION_FORCED;
2276 if (!st->codecpar->extradata) {
2278 st->codecpar->extradata = extradata;
2279 st->codecpar->extradata_size = extradata_size;
2280 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2281 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2282 return AVERROR(ENOMEM);
2283 memcpy(st->codecpar->extradata,
2284 track->codec_priv.data + extradata_offset,
2285 track->codec_priv.size);
2289 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2290 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2291 int display_width_mul = 1;
2292 int display_height_mul = 1;
2294 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2295 st->codecpar->codec_tag = fourcc;
2297 st->codecpar->bits_per_coded_sample = bit_depth;
2298 st->codecpar->width = track->video.pixel_width;
2299 st->codecpar->height = track->video.pixel_height;
2301 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2302 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2303 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2304 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2306 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2307 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2309 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2310 av_reduce(&st->sample_aspect_ratio.num,
2311 &st->sample_aspect_ratio.den,
2312 st->codecpar->height * track->video.display_width * display_width_mul,
2313 st->codecpar->width * track->video.display_height * display_height_mul,
2316 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2317 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2319 if (track->default_duration) {
2320 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2321 1000000000, track->default_duration, 30000);
2322 #if FF_API_R_FRAME_RATE
2323 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2324 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2325 st->r_frame_rate = st->avg_frame_rate;
2329 /* export stereo mode flag as metadata tag */
2330 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2331 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2333 /* export alpha mode flag as metadata tag */
2334 if (track->video.alpha_mode)
2335 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2337 /* if we have virtual track, mark the real tracks */
2338 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2340 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2342 snprintf(buf, sizeof(buf), "%s_%d",
2343 ff_matroska_video_stereo_plane[planes[j].type], i);
2344 for (k=0; k < matroska->tracks.nb_elem; k++)
2345 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2346 av_dict_set(&tracks[k].stream->metadata,
2347 "stereo_mode", buf, 0);
2351 // add stream level stereo3d side data if it is a supported format
2352 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2353 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2354 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2359 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
2360 int ret = mkv_parse_video_color(st, track);
2364 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2365 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2366 st->codecpar->codec_tag = fourcc;
2367 st->codecpar->sample_rate = track->audio.out_samplerate;
2368 st->codecpar->channels = track->audio.channels;
2369 if (!st->codecpar->bits_per_coded_sample)
2370 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2371 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2372 st->need_parsing = AVSTREAM_PARSE_FULL;
2373 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2374 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2375 if (track->codec_delay > 0) {
2376 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2377 (AVRational){1, 1000000000},
2378 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2379 48000 : st->codecpar->sample_rate});
2381 if (track->seek_preroll > 0) {
2382 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2383 (AVRational){1, 1000000000},
2384 (AVRational){1, st->codecpar->sample_rate});
2386 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2387 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2389 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2390 st->disposition |= AV_DISPOSITION_CAPTIONS;
2391 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2392 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2393 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2394 st->disposition |= AV_DISPOSITION_METADATA;
2396 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2397 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2398 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2399 matroska->contains_ssa = 1;
2406 static int matroska_read_header(AVFormatContext *s)
2408 MatroskaDemuxContext *matroska = s->priv_data;
2409 EbmlList *attachments_list = &matroska->attachments;
2410 EbmlList *chapters_list = &matroska->chapters;
2411 MatroskaAttachment *attachments;
2412 MatroskaChapter *chapters;
2413 uint64_t max_start = 0;
2419 matroska->cues_parsing_deferred = 1;
2421 /* First read the EBML header. */
2422 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2423 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2424 ebml_free(ebml_syntax, &ebml);
2425 return AVERROR_INVALIDDATA;
2427 if (ebml.version > EBML_VERSION ||
2428 ebml.max_size > sizeof(uint64_t) ||
2429 ebml.id_length > sizeof(uint32_t) ||
2430 ebml.doctype_version > 3) {
2431 av_log(matroska->ctx, AV_LOG_ERROR,
2432 "EBML header using unsupported features\n"
2433 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2434 ebml.version, ebml.doctype, ebml.doctype_version);
2435 ebml_free(ebml_syntax, &ebml);
2436 return AVERROR_PATCHWELCOME;
2437 } else if (ebml.doctype_version == 3) {
2438 av_log(matroska->ctx, AV_LOG_WARNING,
2439 "EBML header using unsupported features\n"
2440 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2441 ebml.version, ebml.doctype, ebml.doctype_version);
2443 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2444 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2446 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2447 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2448 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2449 ebml_free(ebml_syntax, &ebml);
2450 return AVERROR_INVALIDDATA;
2453 ebml_free(ebml_syntax, &ebml);
2455 /* The next thing is a segment. */
2456 pos = avio_tell(matroska->ctx->pb);
2457 res = ebml_parse(matroska, matroska_segments, matroska);
2458 // try resyncing until we find a EBML_STOP type element.
2460 res = matroska_resync(matroska, pos);
2463 pos = avio_tell(matroska->ctx->pb);
2464 res = ebml_parse(matroska, matroska_segment, matroska);
2466 matroska_execute_seekhead(matroska);
2468 if (!matroska->time_scale)
2469 matroska->time_scale = 1000000;
2470 if (matroska->duration)
2471 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2472 1000 / AV_TIME_BASE;
2473 av_dict_set(&s->metadata, "title", matroska->title, 0);
2474 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2476 if (matroska->date_utc.size == 8)
2477 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2479 res = matroska_parse_tracks(s);
2483 attachments = attachments_list->elem;
2484 for (j = 0; j < attachments_list->nb_elem; j++) {
2485 if (!(attachments[j].filename && attachments[j].mime &&
2486 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2487 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2489 AVStream *st = avformat_new_stream(s, NULL);
2492 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2493 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2494 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2496 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2497 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2498 strlen(ff_mkv_image_mime_tags[i].str))) {
2499 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2504 attachments[j].stream = st;
2506 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2507 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2508 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2510 av_init_packet(&st->attached_pic);
2511 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2513 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2514 st->attached_pic.stream_index = st->index;
2515 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2517 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2518 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2520 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2521 attachments[j].bin.size);
2523 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2524 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2525 strlen(ff_mkv_mime_tags[i].str))) {
2526 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2534 chapters = chapters_list->elem;
2535 for (i = 0; i < chapters_list->nb_elem; i++)
2536 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2537 (max_start == 0 || chapters[i].start > max_start)) {
2538 chapters[i].chapter =
2539 avpriv_new_chapter(s, chapters[i].uid,
2540 (AVRational) { 1, 1000000000 },
2541 chapters[i].start, chapters[i].end,
2543 if (chapters[i].chapter) {
2544 av_dict_set(&chapters[i].chapter->metadata,
2545 "title", chapters[i].title, 0);
2547 max_start = chapters[i].start;
2550 matroska_add_index_entries(matroska);
2552 matroska_convert_tags(s);
2556 matroska_read_close(s);
2561 * Put one packet in an application-supplied AVPacket struct.
2562 * Returns 0 on success or -1 on failure.
2564 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2567 if (matroska->num_packets > 0) {
2568 MatroskaTrack *tracks = matroska->tracks.elem;
2569 MatroskaTrack *track;
2570 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2571 av_freep(&matroska->packets[0]);
2572 track = &tracks[pkt->stream_index];
2573 if (track->has_palette) {
2574 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2576 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2578 memcpy(pal, track->palette, AVPALETTE_SIZE);
2580 track->has_palette = 0;
2582 if (matroska->num_packets > 1) {
2584 memmove(&matroska->packets[0], &matroska->packets[1],
2585 (matroska->num_packets - 1) * sizeof(AVPacket *));
2586 newpackets = av_realloc(matroska->packets,
2587 (matroska->num_packets - 1) *
2588 sizeof(AVPacket *));
2590 matroska->packets = newpackets;
2592 av_freep(&matroska->packets);
2593 matroska->prev_pkt = NULL;
2595 matroska->num_packets--;
2603 * Free all packets in our internal queue.
2605 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2607 matroska->prev_pkt = NULL;
2608 if (matroska->packets) {
2610 for (n = 0; n < matroska->num_packets; n++) {
2611 av_packet_unref(matroska->packets[n]);
2612 av_freep(&matroska->packets[n]);
2614 av_freep(&matroska->packets);
2615 matroska->num_packets = 0;
2619 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2620 int *buf_size, int type,
2621 uint32_t **lace_buf, int *laces)
2623 int res = 0, n, size = *buf_size;
2624 uint8_t *data = *buf;
2625 uint32_t *lace_size;
2629 *lace_buf = av_mallocz(sizeof(int));
2631 return AVERROR(ENOMEM);
2633 *lace_buf[0] = size;
2637 av_assert0(size > 0);
2641 lace_size = av_mallocz(*laces * sizeof(int));
2643 return AVERROR(ENOMEM);
2646 case 0x1: /* Xiph lacing */
2650 for (n = 0; res == 0 && n < *laces - 1; n++) {
2652 if (size <= total) {
2653 res = AVERROR_INVALIDDATA;
2658 lace_size[n] += temp;
2665 if (size <= total) {
2666 res = AVERROR_INVALIDDATA;
2670 lace_size[n] = size - total;
2674 case 0x2: /* fixed-size lacing */
2675 if (size % (*laces)) {
2676 res = AVERROR_INVALIDDATA;
2679 for (n = 0; n < *laces; n++)
2680 lace_size[n] = size / *laces;
2683 case 0x3: /* EBML lacing */
2687 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2688 if (n < 0 || num > INT_MAX) {
2689 av_log(matroska->ctx, AV_LOG_INFO,
2690 "EBML block data error\n");
2691 res = n<0 ? n : AVERROR_INVALIDDATA;
2696 total = lace_size[0] = num;
2697 for (n = 1; res == 0 && n < *laces - 1; n++) {
2700 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2701 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2702 av_log(matroska->ctx, AV_LOG_INFO,
2703 "EBML block data error\n");
2704 res = r<0 ? r : AVERROR_INVALIDDATA;
2709 lace_size[n] = lace_size[n - 1] + snum;
2710 total += lace_size[n];
2712 if (size <= total) {
2713 res = AVERROR_INVALIDDATA;
2716 lace_size[*laces - 1] = size - total;
2722 *lace_buf = lace_size;
2728 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2729 MatroskaTrack *track, AVStream *st,
2730 uint8_t *data, int size, uint64_t timecode,
2733 int a = st->codecpar->block_align;
2734 int sps = track->audio.sub_packet_size;
2735 int cfs = track->audio.coded_framesize;
2736 int h = track->audio.sub_packet_h;
2737 int y = track->audio.sub_packet_cnt;
2738 int w = track->audio.frame_size;
2741 if (!track->audio.pkt_cnt) {
2742 if (track->audio.sub_packet_cnt == 0)
2743 track->audio.buf_timecode = timecode;
2744 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2745 if (size < cfs * h / 2) {
2746 av_log(matroska->ctx, AV_LOG_ERROR,
2747 "Corrupt int4 RM-style audio packet size\n");
2748 return AVERROR_INVALIDDATA;
2750 for (x = 0; x < h / 2; x++)
2751 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2752 data + x * cfs, cfs);
2753 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2755 av_log(matroska->ctx, AV_LOG_ERROR,
2756 "Corrupt sipr RM-style audio packet size\n");
2757 return AVERROR_INVALIDDATA;
2759 memcpy(track->audio.buf + y * w, data, w);
2761 if (size < sps * w / sps || h<=0 || w%sps) {
2762 av_log(matroska->ctx, AV_LOG_ERROR,
2763 "Corrupt generic RM-style audio packet size\n");
2764 return AVERROR_INVALIDDATA;
2766 for (x = 0; x < w / sps; x++)
2767 memcpy(track->audio.buf +
2768 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2769 data + x * sps, sps);
2772 if (++track->audio.sub_packet_cnt >= h) {
2773 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2774 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2775 track->audio.sub_packet_cnt = 0;
2776 track->audio.pkt_cnt = h * w / a;
2780 while (track->audio.pkt_cnt) {
2782 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2784 return AVERROR(ENOMEM);
2786 ret = av_new_packet(pkt, a);
2792 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2794 pkt->pts = track->audio.buf_timecode;
2795 track->audio.buf_timecode = AV_NOPTS_VALUE;
2797 pkt->stream_index = st->index;
2798 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2804 /* reconstruct full wavpack blocks from mangled matroska ones */
2805 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2806 uint8_t **pdst, int *size)
2808 uint8_t *dst = NULL;
2813 int ret, offset = 0;
2815 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2816 return AVERROR_INVALIDDATA;
2818 ver = AV_RL16(track->stream->codecpar->extradata);
2820 samples = AV_RL32(src);
2824 while (srclen >= 8) {
2829 uint32_t flags = AV_RL32(src);
2830 uint32_t crc = AV_RL32(src + 4);
2834 multiblock = (flags & 0x1800) != 0x1800;
2837 ret = AVERROR_INVALIDDATA;
2840 blocksize = AV_RL32(src);
2846 if (blocksize > srclen) {
2847 ret = AVERROR_INVALIDDATA;
2851 tmp = av_realloc(dst, dstlen + blocksize + 32);
2853 ret = AVERROR(ENOMEM);
2857 dstlen += blocksize + 32;
2859 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2860 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2861 AV_WL16(dst + offset + 8, ver); // version
2862 AV_WL16(dst + offset + 10, 0); // track/index_no
2863 AV_WL32(dst + offset + 12, 0); // total samples
2864 AV_WL32(dst + offset + 16, 0); // block index
2865 AV_WL32(dst + offset + 20, samples); // number of samples
2866 AV_WL32(dst + offset + 24, flags); // flags
2867 AV_WL32(dst + offset + 28, crc); // crc
2868 memcpy(dst + offset + 32, src, blocksize); // block data
2871 srclen -= blocksize;
2872 offset += blocksize + 32;
2885 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
2886 MatroskaTrack *track,
2888 uint8_t *data, int data_len,
2894 uint8_t *id, *settings, *text, *buf;
2895 int id_len, settings_len, text_len;
2900 return AVERROR_INVALIDDATA;
2903 q = data + data_len;
2908 if (*p == '\r' || *p == '\n') {
2917 if (p >= q || *p != '\n')
2918 return AVERROR_INVALIDDATA;
2924 if (*p == '\r' || *p == '\n') {
2925 settings_len = p - settings;
2933 if (p >= q || *p != '\n')
2934 return AVERROR_INVALIDDATA;
2939 while (text_len > 0) {
2940 const int len = text_len - 1;
2941 const uint8_t c = p[len];
2942 if (c != '\r' && c != '\n')
2948 return AVERROR_INVALIDDATA;
2950 pkt = av_mallocz(sizeof(*pkt));
2952 return AVERROR(ENOMEM);
2953 err = av_new_packet(pkt, text_len);
2956 return AVERROR(err);
2959 memcpy(pkt->data, text, text_len);
2962 buf = av_packet_new_side_data(pkt,
2963 AV_PKT_DATA_WEBVTT_IDENTIFIER,
2967 return AVERROR(ENOMEM);
2969 memcpy(buf, id, id_len);
2972 if (settings_len > 0) {
2973 buf = av_packet_new_side_data(pkt,
2974 AV_PKT_DATA_WEBVTT_SETTINGS,
2978 return AVERROR(ENOMEM);
2980 memcpy(buf, settings, settings_len);
2983 // Do we need this for subtitles?
2984 // pkt->flags = AV_PKT_FLAG_KEY;
2986 pkt->stream_index = st->index;
2987 pkt->pts = timecode;
2989 // Do we need this for subtitles?
2990 // pkt->dts = timecode;
2992 pkt->duration = duration;
2995 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2996 matroska->prev_pkt = pkt;
3001 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3002 MatroskaTrack *track, AVStream *st,
3003 uint8_t *data, int pkt_size,
3004 uint64_t timecode, uint64_t lace_duration,
3005 int64_t pos, int is_keyframe,
3006 uint8_t *additional, uint64_t additional_id, int additional_size,
3007 int64_t discard_padding)
3009 MatroskaTrackEncoding *encodings = track->encodings.elem;
3010 uint8_t *pkt_data = data;
3011 int offset = 0, res;
3014 if (encodings && !encodings->type && encodings->scope & 1) {
3015 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3020 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3022 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3024 av_log(matroska->ctx, AV_LOG_ERROR,
3025 "Error parsing a wavpack block.\n");
3028 if (pkt_data != data)
3029 av_freep(&pkt_data);
3033 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3034 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3037 pkt = av_mallocz(sizeof(AVPacket));
3039 if (pkt_data != data)
3040 av_freep(&pkt_data);
3041 return AVERROR(ENOMEM);
3043 /* XXX: prevent data copy... */
3044 if (av_new_packet(pkt, pkt_size + offset) < 0) {
3046 res = AVERROR(ENOMEM);
3050 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3051 uint8_t *buf = pkt->data;
3052 bytestream_put_be32(&buf, pkt_size);
3053 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3056 memcpy(pkt->data + offset, pkt_data, pkt_size);
3058 if (pkt_data != data)
3059 av_freep(&pkt_data);
3061 pkt->flags = is_keyframe;
3062 pkt->stream_index = st->index;
3064 if (additional_size > 0) {
3065 uint8_t *side_data = av_packet_new_side_data(pkt,
3066 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3067 additional_size + 8);
3069 av_packet_unref(pkt);
3071 return AVERROR(ENOMEM);
3073 AV_WB64(side_data, additional_id);
3074 memcpy(side_data + 8, additional, additional_size);
3077 if (discard_padding) {
3078 uint8_t *side_data = av_packet_new_side_data(pkt,
3079 AV_PKT_DATA_SKIP_SAMPLES,
3082 av_packet_unref(pkt);
3084 return AVERROR(ENOMEM);
3086 discard_padding = av_rescale_q(discard_padding,
3087 (AVRational){1, 1000000000},
3088 (AVRational){1, st->codecpar->sample_rate});
3089 if (discard_padding > 0) {
3090 AV_WL32(side_data + 4, discard_padding);
3092 AV_WL32(side_data, -discard_padding);
3096 if (track->ms_compat)
3097 pkt->dts = timecode;
3099 pkt->pts = timecode;
3101 pkt->duration = lace_duration;
3103 #if FF_API_CONVERGENCE_DURATION
3104 FF_DISABLE_DEPRECATION_WARNINGS
3105 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3106 pkt->convergence_duration = lace_duration;
3108 FF_ENABLE_DEPRECATION_WARNINGS
3111 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3112 matroska->prev_pkt = pkt;
3117 if (pkt_data != data)
3118 av_freep(&pkt_data);
3122 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3123 int size, int64_t pos, uint64_t cluster_time,
3124 uint64_t block_duration, int is_keyframe,
3125 uint8_t *additional, uint64_t additional_id, int additional_size,
3126 int64_t cluster_pos, int64_t discard_padding)
3128 uint64_t timecode = AV_NOPTS_VALUE;
3129 MatroskaTrack *track;
3133 uint32_t *lace_size = NULL;
3134 int n, flags, laces = 0;
3136 int trust_default_duration = 1;
3138 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3139 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3145 track = matroska_find_track_by_num(matroska, num);
3146 if (!track || !track->stream) {
3147 av_log(matroska->ctx, AV_LOG_INFO,
3148 "Invalid stream %"PRIu64" or size %u\n", num, size);
3149 return AVERROR_INVALIDDATA;
3150 } else if (size <= 3)
3153 if (st->discard >= AVDISCARD_ALL)
3155 av_assert1(block_duration != AV_NOPTS_VALUE);
3157 block_time = sign_extend(AV_RB16(data), 16);
3161 if (is_keyframe == -1)
3162 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3164 if (cluster_time != (uint64_t) -1 &&
3165 (block_time >= 0 || cluster_time >= -block_time)) {
3166 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3167 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3168 timecode < track->end_timecode)
3169 is_keyframe = 0; /* overlapping subtitles are not key frame */
3171 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3175 if (matroska->skip_to_keyframe &&
3176 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3177 // Compare signed timecodes. Timecode may be negative due to codec delay
3178 // offset. We don't support timestamps greater than int64_t anyway - see
3180 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3183 matroska->skip_to_keyframe = 0;
3184 else if (!st->skip_to_keyframe) {
3185 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3186 matroska->skip_to_keyframe = 0;
3190 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3191 &lace_size, &laces);
3196 if (track->audio.samplerate == 8000) {
3197 // If this is needed for more codecs, then add them here
3198 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3199 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3200 trust_default_duration = 0;
3204 if (!block_duration && trust_default_duration)
3205 block_duration = track->default_duration * laces / matroska->time_scale;
3207 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3208 track->end_timecode =
3209 FFMAX(track->end_timecode, timecode + block_duration);
3211 for (n = 0; n < laces; n++) {
3212 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3214 if (lace_size[n] > size) {
3215 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3219 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3220 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3221 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3222 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3223 st->codecpar->block_align && track->audio.sub_packet_size) {
3224 res = matroska_parse_rm_audio(matroska, track, st, data,
3230 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3231 res = matroska_parse_webvtt(matroska, track, st,
3233 timecode, lace_duration,
3238 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3239 timecode, lace_duration, pos,
3240 !n ? is_keyframe : 0,
3241 additional, additional_id, additional_size,
3247 if (timecode != AV_NOPTS_VALUE)
3248 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3249 data += lace_size[n];
3250 size -= lace_size[n];
3258 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3260 EbmlList *blocks_list;
3261 MatroskaBlock *blocks;
3263 res = ebml_parse(matroska,
3264 matroska_cluster_incremental_parsing,
3265 &matroska->current_cluster);
3268 if (matroska->current_cluster_pos)
3269 ebml_level_end(matroska);
3270 ebml_free(matroska_cluster, &matroska->current_cluster);
3271 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3272 matroska->current_cluster_num_blocks = 0;
3273 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3274 matroska->prev_pkt = NULL;
3275 /* sizeof the ID which was already read */
3276 if (matroska->current_id)
3277 matroska->current_cluster_pos -= 4;
3278 res = ebml_parse(matroska,
3279 matroska_clusters_incremental,
3280 &matroska->current_cluster);
3281 /* Try parsing the block again. */
3283 res = ebml_parse(matroska,
3284 matroska_cluster_incremental_parsing,
3285 &matroska->current_cluster);
3289 matroska->current_cluster_num_blocks <
3290 matroska->current_cluster.blocks.nb_elem) {
3291 blocks_list = &matroska->current_cluster.blocks;
3292 blocks = blocks_list->elem;
3294 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3295 i = blocks_list->nb_elem - 1;
3296 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3297 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3298 uint8_t* additional = blocks[i].additional.size > 0 ?
3299 blocks[i].additional.data : NULL;
3300 if (!blocks[i].non_simple)
3301 blocks[i].duration = 0;
3302 res = matroska_parse_block(matroska, blocks[i].bin.data,
3303 blocks[i].bin.size, blocks[i].bin.pos,
3304 matroska->current_cluster.timecode,
3305 blocks[i].duration, is_keyframe,
3306 additional, blocks[i].additional_id,
3307 blocks[i].additional.size,
3308 matroska->current_cluster_pos,
3309 blocks[i].discard_padding);
3316 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3318 MatroskaCluster cluster = { 0 };
3319 EbmlList *blocks_list;
3320 MatroskaBlock *blocks;
3324 if (!matroska->contains_ssa)
3325 return matroska_parse_cluster_incremental(matroska);
3326 pos = avio_tell(matroska->ctx->pb);
3327 matroska->prev_pkt = NULL;
3328 if (matroska->current_id)
3329 pos -= 4; /* sizeof the ID which was already read */
3330 res = ebml_parse(matroska, matroska_clusters, &cluster);
3331 blocks_list = &cluster.blocks;
3332 blocks = blocks_list->elem;
3333 for (i = 0; i < blocks_list->nb_elem; i++)
3334 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3335 int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
3336 res = matroska_parse_block(matroska, blocks[i].bin.data,
3337 blocks[i].bin.size, blocks[i].bin.pos,
3338 cluster.timecode, blocks[i].duration,
3339 is_keyframe, NULL, 0, 0, pos,
3340 blocks[i].discard_padding);
3342 ebml_free(matroska_cluster, &cluster);
3346 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3348 MatroskaDemuxContext *matroska = s->priv_data;
3351 while (matroska_deliver_packet(matroska, pkt)) {
3352 int64_t pos = avio_tell(matroska->ctx->pb);
3354 return (ret < 0) ? ret : AVERROR_EOF;
3355 if (matroska_parse_cluster(matroska) < 0)
3356 ret = matroska_resync(matroska, pos);
3362 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3363 int64_t timestamp, int flags)
3365 MatroskaDemuxContext *matroska = s->priv_data;
3366 MatroskaTrack *tracks = NULL;
3367 AVStream *st = s->streams[stream_index];
3368 int i, index, index_sub, index_min;
3370 /* Parse the CUES now since we need the index data to seek. */
3371 if (matroska->cues_parsing_deferred > 0) {
3372 matroska->cues_parsing_deferred = 0;
3373 matroska_parse_cues(matroska);
3376 if (!st->nb_index_entries)
3378 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3380 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3381 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3383 matroska->current_id = 0;
3384 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3385 matroska_clear_queue(matroska);
3386 if (matroska_parse_cluster(matroska) < 0)
3391 matroska_clear_queue(matroska);
3392 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3396 tracks = matroska->tracks.elem;
3397 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3398 tracks[i].audio.pkt_cnt = 0;
3399 tracks[i].audio.sub_packet_cnt = 0;
3400 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3401 tracks[i].end_timecode = 0;
3404 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3405 matroska->current_id = 0;
3406 if (flags & AVSEEK_FLAG_ANY) {
3407 st->skip_to_keyframe = 0;
3408 matroska->skip_to_timecode = timestamp;
3410 st->skip_to_keyframe = 1;
3411 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3413 matroska->skip_to_keyframe = 1;
3415 matroska->num_levels = 0;
3416 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3419 // slightly hackish but allows proper fallback to
3420 // the generic seeking code.
3421 matroska_clear_queue(matroska);
3422 matroska->current_id = 0;
3423 st->skip_to_keyframe =
3424 matroska->skip_to_keyframe = 0;
3426 matroska->num_levels = 0;
3430 static int matroska_read_close(AVFormatContext *s)
3432 MatroskaDemuxContext *matroska = s->priv_data;
3433 MatroskaTrack *tracks = matroska->tracks.elem;
3436 matroska_clear_queue(matroska);
3438 for (n = 0; n < matroska->tracks.nb_elem; n++)
3439 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3440 av_freep(&tracks[n].audio.buf);
3441 ebml_free(matroska_cluster, &matroska->current_cluster);
3442 ebml_free(matroska_segment, matroska);
3448 int64_t start_time_ns;
3449 int64_t end_time_ns;
3450 int64_t start_offset;
3454 /* This function searches all the Cues and returns the CueDesc corresponding the
3455 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3456 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3458 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3459 MatroskaDemuxContext *matroska = s->priv_data;
3462 int nb_index_entries = s->streams[0]->nb_index_entries;
3463 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3464 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3465 for (i = 1; i < nb_index_entries; i++) {
3466 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3467 index_entries[i].timestamp * matroska->time_scale > ts) {
3472 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3473 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3474 if (i != nb_index_entries - 1) {
3475 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3476 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3478 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3479 // FIXME: this needs special handling for files where Cues appear
3480 // before Clusters. the current logic assumes Cues appear after
3482 cue_desc.end_offset = cues_start - matroska->segment_start;
3487 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3489 MatroskaDemuxContext *matroska = s->priv_data;
3490 int64_t cluster_pos, before_pos;
3492 if (s->streams[0]->nb_index_entries <= 0) return 0;
3493 // seek to the first cluster using cues.
3494 index = av_index_search_timestamp(s->streams[0], 0, 0);
3495 if (index < 0) return 0;
3496 cluster_pos = s->streams[0]->index_entries[index].pos;
3497 before_pos = avio_tell(s->pb);
3499 int64_t cluster_id = 0, cluster_length = 0;
3501 avio_seek(s->pb, cluster_pos, SEEK_SET);
3502 // read cluster id and length
3503 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3504 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3505 if (cluster_id != 0xF43B675) { // done with all clusters
3508 avio_seek(s->pb, cluster_pos, SEEK_SET);
3509 matroska->current_id = 0;
3510 matroska_clear_queue(matroska);
3511 if (matroska_parse_cluster(matroska) < 0 ||
3512 matroska->num_packets <= 0) {
3515 pkt = matroska->packets[0];
3516 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3517 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3522 avio_seek(s->pb, before_pos, SEEK_SET);
3526 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3527 double min_buffer, double* buffer,
3528 double* sec_to_download, AVFormatContext *s,
3531 double nano_seconds_per_second = 1000000000.0;
3532 double time_sec = time_ns / nano_seconds_per_second;
3534 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3535 int64_t end_time_ns = time_ns + time_to_search_ns;
3536 double sec_downloaded = 0.0;
3537 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3538 if (desc_curr.start_time_ns == -1)
3540 *sec_to_download = 0.0;
3542 // Check for non cue start time.
3543 if (time_ns > desc_curr.start_time_ns) {
3544 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3545 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3546 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3547 double timeToDownload = (cueBytes * 8.0) / bps;
3549 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3550 *sec_to_download += timeToDownload;
3552 // Check if the search ends within the first cue.
3553 if (desc_curr.end_time_ns >= end_time_ns) {
3554 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3555 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3556 sec_downloaded = percent_to_sub * sec_downloaded;
3557 *sec_to_download = percent_to_sub * *sec_to_download;
3560 if ((sec_downloaded + *buffer) <= min_buffer) {
3564 // Get the next Cue.
3565 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3568 while (desc_curr.start_time_ns != -1) {
3569 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3570 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3571 double desc_sec = desc_ns / nano_seconds_per_second;
3572 double bits = (desc_bytes * 8.0);
3573 double time_to_download = bits / bps;
3575 sec_downloaded += desc_sec - time_to_download;
3576 *sec_to_download += time_to_download;
3578 if (desc_curr.end_time_ns >= end_time_ns) {
3579 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3580 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3581 sec_downloaded = percent_to_sub * sec_downloaded;
3582 *sec_to_download = percent_to_sub * *sec_to_download;
3584 if ((sec_downloaded + *buffer) <= min_buffer)
3589 if ((sec_downloaded + *buffer) <= min_buffer) {
3594 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3596 *buffer = *buffer + sec_downloaded;
3600 /* This function computes the bandwidth of the WebM file with the help of
3601 * buffer_size_after_time_downloaded() function. Both of these functions are
3602 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3603 * Matroska parsing mechanism.
3605 * Returns the bandwidth of the file on success; -1 on error.
3607 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3609 MatroskaDemuxContext *matroska = s->priv_data;
3610 AVStream *st = s->streams[0];
3611 double bandwidth = 0.0;
3614 for (i = 0; i < st->nb_index_entries; i++) {
3615 int64_t prebuffer_ns = 1000000000;
3616 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3617 double nano_seconds_per_second = 1000000000.0;
3618 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3619 double prebuffer_bytes = 0.0;
3620 int64_t temp_prebuffer_ns = prebuffer_ns;
3621 int64_t pre_bytes, pre_ns;
3622 double pre_sec, prebuffer, bits_per_second;
3623 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3625 // Start with the first Cue.
3626 CueDesc desc_end = desc_beg;
3628 // Figure out how much data we have downloaded for the prebuffer. This will
3629 // be used later to adjust the bits per sample to try.
3630 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3631 // Prebuffered the entire Cue.
3632 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3633 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3634 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3636 if (desc_end.start_time_ns == -1) {
3637 // The prebuffer is larger than the duration.
3638 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3640 bits_per_second = 0.0;
3642 // The prebuffer ends in the last Cue. Estimate how much data was
3644 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3645 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3646 pre_sec = pre_ns / nano_seconds_per_second;
3648 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3650 prebuffer = prebuffer_ns / nano_seconds_per_second;
3652 // Set this to 0.0 in case our prebuffer buffers the entire video.
3653 bits_per_second = 0.0;
3655 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3656 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3657 double desc_sec = desc_ns / nano_seconds_per_second;
3658 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3660 // Drop the bps by the percentage of bytes buffered.
3661 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3662 double mod_bits_per_second = calc_bits_per_second * percent;
3664 if (prebuffer < desc_sec) {
3666 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3668 // Add 1 so the bits per second should be a little bit greater than file
3670 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3671 const double min_buffer = 0.0;
3672 double buffer = prebuffer;
3673 double sec_to_download = 0.0;
3675 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3676 min_buffer, &buffer, &sec_to_download,
3680 } else if (rv == 0) {
3681 bits_per_second = (double)(bps);
3686 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3687 } while (desc_end.start_time_ns != -1);
3689 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3691 return (int64_t)bandwidth;
3694 static int webm_dash_manifest_cues(AVFormatContext *s)
3696 MatroskaDemuxContext *matroska = s->priv_data;
3697 EbmlList *seekhead_list = &matroska->seekhead;
3698 MatroskaSeekhead *seekhead = seekhead_list->elem;
3700 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3703 // determine cues start and end positions
3704 for (i = 0; i < seekhead_list->nb_elem; i++)
3705 if (seekhead[i].id == MATROSKA_ID_CUES)
3708 if (i >= seekhead_list->nb_elem) return -1;
3710 before_pos = avio_tell(matroska->ctx->pb);
3711 cues_start = seekhead[i].pos + matroska->segment_start;
3712 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3713 // cues_end is computed as cues_start + cues_length + length of the
3714 // Cues element ID + EBML length of the Cues element. cues_end is
3715 // inclusive and the above sum is reduced by 1.
3716 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3717 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3718 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3719 cues_end = cues_start + cues_length + bytes_read - 1;
3721 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3722 if (cues_start == -1 || cues_end == -1) return -1;
3725 matroska_parse_cues(matroska);
3728 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3731 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3734 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3735 if (bandwidth < 0) return -1;
3736 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3738 // check if all clusters start with key frames
3739 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3741 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3742 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3743 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3744 if (!buf) return -1;
3746 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3747 snprintf(buf, (i + 1) * 20 * sizeof(char),
3748 "%s%" PRId64, buf, s->streams[0]->index_entries[i].timestamp);
3749 if (i != s->streams[0]->nb_index_entries - 1)
3750 strncat(buf, ",", sizeof(char));
3752 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3758 static int webm_dash_manifest_read_header(AVFormatContext *s)
3761 int ret = matroska_read_header(s);
3762 MatroskaTrack *tracks;
3763 MatroskaDemuxContext *matroska = s->priv_data;
3765 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3768 if (!s->nb_streams) {
3769 matroska_read_close(s);
3770 av_log(s, AV_LOG_ERROR, "No streams found\n");
3771 return AVERROR_INVALIDDATA;
3774 if (!matroska->is_live) {
3775 buf = av_asprintf("%g", matroska->duration);
3776 if (!buf) return AVERROR(ENOMEM);
3777 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3780 // initialization range
3781 // 5 is the offset of Cluster ID.
3782 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, avio_tell(s->pb) - 5, 0);
3785 // basename of the file
3786 buf = strrchr(s->filename, '/');
3787 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->filename, 0);
3790 tracks = matroska->tracks.elem;
3791 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3793 // parse the cues and populate Cue related fields
3794 return matroska->is_live ? 0 : webm_dash_manifest_cues(s);
3797 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3802 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3803 static const AVOption options[] = {
3804 { "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 },
3808 static const AVClass webm_dash_class = {
3809 .class_name = "WebM DASH Manifest demuxer",
3810 .item_name = av_default_item_name,
3812 .version = LIBAVUTIL_VERSION_INT,
3815 AVInputFormat ff_matroska_demuxer = {
3816 .name = "matroska,webm",
3817 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3818 .extensions = "mkv,mk3d,mka,mks",
3819 .priv_data_size = sizeof(MatroskaDemuxContext),
3820 .read_probe = matroska_probe,
3821 .read_header = matroska_read_header,
3822 .read_packet = matroska_read_packet,
3823 .read_close = matroska_read_close,
3824 .read_seek = matroska_read_seek,
3825 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3828 AVInputFormat ff_webm_dash_manifest_demuxer = {
3829 .name = "webm_dash_manifest",
3830 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3831 .priv_data_size = sizeof(MatroskaDemuxContext),
3832 .read_header = webm_dash_manifest_read_header,
3833 .read_packet = webm_dash_manifest_read_packet,
3834 .read_close = matroska_read_close,
3835 .priv_class = &webm_dash_class,