2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
86 typedef const struct EbmlSyntax {
96 const struct EbmlSyntax *n;
100 typedef struct EbmlList {
105 typedef struct EbmlBin {
111 typedef struct Ebml {
116 uint64_t doctype_version;
119 typedef struct MatroskaTrackCompression {
122 } MatroskaTrackCompression;
124 typedef struct MatroskaTrackEncryption {
127 } MatroskaTrackEncryption;
129 typedef struct MatroskaTrackEncoding {
132 MatroskaTrackCompression compression;
133 MatroskaTrackEncryption encryption;
134 } MatroskaTrackEncoding;
136 typedef struct MatroskaMasteringMeta {
145 double max_luminance;
146 double min_luminance;
147 } MatroskaMasteringMeta;
149 typedef struct MatroskaTrackVideoColor {
150 uint64_t matrix_coefficients;
151 uint64_t bits_per_channel;
152 uint64_t chroma_sub_horz;
153 uint64_t chroma_sub_vert;
154 uint64_t cb_sub_horz;
155 uint64_t cb_sub_vert;
156 uint64_t chroma_siting_horz;
157 uint64_t chroma_siting_vert;
159 uint64_t transfer_characteristics;
163 MatroskaMasteringMeta mastering_meta;
164 } MatroskaTrackVideoColor;
166 typedef struct MatroskaTrackVideoProjection {
172 } MatroskaTrackVideoProjection;
174 typedef struct MatroskaTrackVideo {
176 uint64_t display_width;
177 uint64_t display_height;
178 uint64_t pixel_width;
179 uint64_t pixel_height;
181 uint64_t display_unit;
183 uint64_t field_order;
184 uint64_t stereo_mode;
187 MatroskaTrackVideoProjection projection;
188 } MatroskaTrackVideo;
190 typedef struct MatroskaTrackAudio {
192 double out_samplerate;
196 /* real audio header (extracted from extradata) */
203 uint64_t buf_timecode;
205 } MatroskaTrackAudio;
207 typedef struct MatroskaTrackPlane {
210 } MatroskaTrackPlane;
212 typedef struct MatroskaTrackOperation {
213 EbmlList combine_planes;
214 } MatroskaTrackOperation;
216 typedef struct MatroskaTrack {
225 uint64_t default_duration;
226 uint64_t flag_default;
227 uint64_t flag_forced;
228 uint64_t seek_preroll;
229 MatroskaTrackVideo video;
230 MatroskaTrackAudio audio;
231 MatroskaTrackOperation operation;
233 uint64_t codec_delay;
234 uint64_t codec_delay_in_track_tb;
237 int64_t end_timecode;
239 uint64_t max_block_additional_id;
241 uint32_t palette[AVPALETTE_COUNT];
245 typedef struct MatroskaAttachment {
252 } MatroskaAttachment;
254 typedef struct MatroskaChapter {
263 typedef struct MatroskaIndexPos {
268 typedef struct MatroskaIndex {
273 typedef struct MatroskaTag {
281 typedef struct MatroskaTagTarget {
289 typedef struct MatroskaTags {
290 MatroskaTagTarget target;
294 typedef struct MatroskaSeekhead {
299 typedef struct MatroskaLevel {
304 typedef struct MatroskaCluster {
309 typedef struct MatroskaLevel1Element {
313 } MatroskaLevel1Element;
315 typedef struct MatroskaDemuxContext {
316 const AVClass *class;
317 AVFormatContext *ctx;
321 MatroskaLevel levels[EBML_MAX_DEPTH];
331 EbmlList attachments;
337 /* byte position of the segment inside the stream */
338 int64_t segment_start;
340 /* the packet queue */
347 /* What to skip before effectively reading a packet. */
348 int skip_to_keyframe;
349 uint64_t skip_to_timecode;
351 /* File has a CUES element, but we defer parsing until it is needed. */
352 int cues_parsing_deferred;
354 /* Level1 elements and whether they were read yet */
355 MatroskaLevel1Element level1_elems[64];
356 int num_level1_elems;
358 int current_cluster_num_blocks;
359 int64_t current_cluster_pos;
360 MatroskaCluster current_cluster;
362 /* File has SSA subtitles which prevent incremental cluster parsing. */
365 /* WebM DASH Manifest live flag */
368 /* Bandwidth value for WebM DASH Manifest */
370 } MatroskaDemuxContext;
372 typedef struct MatroskaBlock {
377 uint64_t additional_id;
379 int64_t discard_padding;
382 static const EbmlSyntax ebml_header[] = {
383 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
384 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
385 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
386 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
387 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
388 { EBML_ID_EBMLVERSION, EBML_NONE },
389 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
393 static const EbmlSyntax ebml_syntax[] = {
394 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
398 static const EbmlSyntax matroska_info[] = {
399 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
400 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
401 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
402 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
403 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
404 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
405 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
409 static const EbmlSyntax matroska_mastering_meta[] = {
410 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
419 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
423 static const EbmlSyntax matroska_track_video_color[] = {
424 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
425 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
430 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
431 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
432 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
435 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
436 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
437 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
441 static const EbmlSyntax matroska_track_video_projection[] = {
442 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
443 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
445 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
446 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
450 static const EbmlSyntax matroska_track_video[] = {
451 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
452 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
453 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
454 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
455 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
456 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
457 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
458 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
459 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
460 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
462 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
463 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
464 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
465 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
466 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
467 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
468 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
472 static const EbmlSyntax matroska_track_audio[] = {
473 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
474 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
475 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
476 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
480 static const EbmlSyntax matroska_track_encoding_compression[] = {
481 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
482 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
486 static const EbmlSyntax matroska_track_encoding_encryption[] = {
487 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
488 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
489 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
493 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
496 static const EbmlSyntax matroska_track_encoding[] = {
497 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
498 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
499 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
500 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
501 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
505 static const EbmlSyntax matroska_track_encodings[] = {
506 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
510 static const EbmlSyntax matroska_track_plane[] = {
511 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
512 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
516 static const EbmlSyntax matroska_track_combine_planes[] = {
517 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
521 static const EbmlSyntax matroska_track_operation[] = {
522 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
526 static const EbmlSyntax matroska_track[] = {
527 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
528 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
529 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
530 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
531 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
532 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
533 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
534 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
535 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
536 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
537 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
538 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
539 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
540 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
541 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
542 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
543 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
544 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
545 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
546 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
547 { MATROSKA_ID_CODECNAME, EBML_NONE },
548 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
549 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
550 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
551 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
552 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
556 static const EbmlSyntax matroska_tracks[] = {
557 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
561 static const EbmlSyntax matroska_attachment[] = {
562 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
563 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
564 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
565 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
566 { MATROSKA_ID_FILEDESC, EBML_NONE },
570 static const EbmlSyntax matroska_attachments[] = {
571 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
575 static const EbmlSyntax matroska_chapter_display[] = {
576 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
577 { MATROSKA_ID_CHAPLANG, EBML_NONE },
578 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
582 static const EbmlSyntax matroska_chapter_entry[] = {
583 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
584 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
585 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
586 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
587 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
588 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
589 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
590 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
594 static const EbmlSyntax matroska_chapter[] = {
595 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
596 { MATROSKA_ID_EDITIONUID, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
598 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
599 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
603 static const EbmlSyntax matroska_chapters[] = {
604 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
608 static const EbmlSyntax matroska_index_pos[] = {
609 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
610 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
611 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
612 { MATROSKA_ID_CUEDURATION, EBML_NONE },
613 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
617 static const EbmlSyntax matroska_index_entry[] = {
618 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
619 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
623 static const EbmlSyntax matroska_index[] = {
624 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
628 static const EbmlSyntax matroska_simpletag[] = {
629 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
630 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
631 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
632 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
633 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
634 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
638 static const EbmlSyntax matroska_tagtargets[] = {
639 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
640 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
641 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
642 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
643 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
647 static const EbmlSyntax matroska_tag[] = {
648 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
649 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
653 static const EbmlSyntax matroska_tags[] = {
654 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
658 static const EbmlSyntax matroska_seekhead_entry[] = {
659 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
660 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
664 static const EbmlSyntax matroska_seekhead[] = {
665 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
669 static const EbmlSyntax matroska_segment[] = {
670 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
671 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
672 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
673 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
674 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
675 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
676 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
677 { MATROSKA_ID_CLUSTER, EBML_STOP },
681 static const EbmlSyntax matroska_segments[] = {
682 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
686 static const EbmlSyntax matroska_blockmore[] = {
687 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
688 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
692 static const EbmlSyntax matroska_blockadditions[] = {
693 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
697 static const EbmlSyntax matroska_blockgroup[] = {
698 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
699 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
700 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
701 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
702 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
703 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
704 { MATROSKA_ID_CODECSTATE, EBML_NONE },
705 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
709 static const EbmlSyntax matroska_cluster[] = {
710 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
711 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
712 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
713 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
714 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
718 static const EbmlSyntax matroska_clusters[] = {
719 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
720 { MATROSKA_ID_INFO, EBML_NONE },
721 { MATROSKA_ID_CUES, EBML_NONE },
722 { MATROSKA_ID_TAGS, EBML_NONE },
723 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
727 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
728 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
729 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
730 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
731 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
732 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
733 { MATROSKA_ID_INFO, EBML_NONE },
734 { MATROSKA_ID_CUES, EBML_NONE },
735 { MATROSKA_ID_TAGS, EBML_NONE },
736 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
737 { MATROSKA_ID_CLUSTER, EBML_STOP },
741 static const EbmlSyntax matroska_cluster_incremental[] = {
742 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
743 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
744 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
745 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
746 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
750 static const EbmlSyntax matroska_clusters_incremental[] = {
751 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
752 { MATROSKA_ID_INFO, EBML_NONE },
753 { MATROSKA_ID_CUES, EBML_NONE },
754 { MATROSKA_ID_TAGS, EBML_NONE },
755 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
759 static const char *const matroska_doctypes[] = { "matroska", "webm" };
761 static int matroska_read_close(AVFormatContext *s);
763 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
765 AVIOContext *pb = matroska->ctx->pb;
768 matroska->current_id = 0;
769 matroska->num_levels = 0;
771 /* seek to next position to resync from */
772 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
779 // try to find a toplevel element
780 while (!avio_feof(pb)) {
781 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
782 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
783 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
784 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
785 matroska->current_id = id;
788 id = (id << 8) | avio_r8(pb);
796 * Return: Whether we reached the end of a level in the hierarchy or not.
798 static int ebml_level_end(MatroskaDemuxContext *matroska)
800 AVIOContext *pb = matroska->ctx->pb;
801 int64_t pos = avio_tell(pb);
803 if (matroska->num_levels > 0) {
804 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
805 if (pos - level->start >= level->length || matroska->current_id) {
806 matroska->num_levels--;
810 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
814 * Read: an "EBML number", which is defined as a variable-length
815 * array of bytes. The first byte indicates the length by giving a
816 * number of 0-bits followed by a one. The position of the first
817 * "one" bit inside the first byte indicates the length of this
819 * Returns: number of bytes read, < 0 on error
821 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
822 int max_size, uint64_t *number)
827 /* The first byte tells us the length in bytes - avio_r8() can normally
828 * return 0, but since that's not a valid first ebmlID byte, we can
829 * use it safely here to catch EOS. */
830 if (!(total = avio_r8(pb))) {
831 /* we might encounter EOS here */
832 if (!avio_feof(pb)) {
833 int64_t pos = avio_tell(pb);
834 av_log(matroska->ctx, AV_LOG_ERROR,
835 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
837 return pb->error ? pb->error : AVERROR(EIO);
842 /* get the length of the EBML number */
843 read = 8 - ff_log2_tab[total];
844 if (read > max_size) {
845 int64_t pos = avio_tell(pb) - 1;
846 av_log(matroska->ctx, AV_LOG_ERROR,
847 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
848 (uint8_t) total, pos, pos);
849 return AVERROR_INVALIDDATA;
852 /* read out length */
853 total ^= 1 << ff_log2_tab[total];
855 total = (total << 8) | avio_r8(pb);
863 * Read a EBML length value.
864 * This needs special handling for the "unknown length" case which has multiple
867 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
870 int res = ebml_read_num(matroska, pb, 8, number);
871 if (res > 0 && *number + 1 == 1ULL << (7 * res))
872 *number = 0xffffffffffffffULL;
877 * Read the next element as an unsigned int.
878 * 0 is success, < 0 is failure.
880 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
885 return AVERROR_INVALIDDATA;
887 /* big-endian ordering; build up number */
890 *num = (*num << 8) | avio_r8(pb);
896 * Read the next element as a signed int.
897 * 0 is success, < 0 is failure.
899 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
904 return AVERROR_INVALIDDATA;
909 *num = sign_extend(avio_r8(pb), 8);
911 /* big-endian ordering; build up number */
913 *num = ((uint64_t)*num << 8) | avio_r8(pb);
920 * Read the next element as a float.
921 * 0 is success, < 0 is failure.
923 static int ebml_read_float(AVIOContext *pb, int size, double *num)
928 *num = av_int2float(avio_rb32(pb));
930 *num = av_int2double(avio_rb64(pb));
932 return AVERROR_INVALIDDATA;
938 * Read the next element as an ASCII string.
939 * 0 is success, < 0 is failure.
941 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
945 /* EBML strings are usually not 0-terminated, so we allocate one
946 * byte more, read the string and NULL-terminate it ourselves. */
947 if (!(res = av_malloc(size + 1)))
948 return AVERROR(ENOMEM);
949 if (avio_read(pb, (uint8_t *) res, size) != size) {
961 * Read the next element as binary data.
962 * 0 is success, < 0 is failure.
964 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
966 av_fast_padded_malloc(&bin->data, &bin->size, length);
968 return AVERROR(ENOMEM);
971 bin->pos = avio_tell(pb);
972 if (avio_read(pb, bin->data, length) != length) {
973 av_freep(&bin->data);
982 * Read the next element, but only the header. The contents
983 * are supposed to be sub-elements which can be read separately.
984 * 0 is success, < 0 is failure.
986 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
988 AVIOContext *pb = matroska->ctx->pb;
989 MatroskaLevel *level;
991 if (matroska->num_levels >= EBML_MAX_DEPTH) {
992 av_log(matroska->ctx, AV_LOG_ERROR,
993 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
994 return AVERROR(ENOSYS);
997 level = &matroska->levels[matroska->num_levels++];
998 level->start = avio_tell(pb);
999 level->length = length;
1005 * Read signed/unsigned "EBML" numbers.
1006 * Return: number of bytes processed, < 0 on error
1008 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1009 uint8_t *data, uint32_t size, uint64_t *num)
1012 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1013 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1017 * Same as above, but signed.
1019 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1020 uint8_t *data, uint32_t size, int64_t *num)
1025 /* read as unsigned number first */
1026 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1029 /* make signed (weird way) */
1030 *num = unum - ((1LL << (7 * res - 1)) - 1);
1035 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1036 EbmlSyntax *syntax, void *data);
1038 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1039 uint32_t id, void *data)
1042 for (i = 0; syntax[i].id; i++)
1043 if (id == syntax[i].id)
1045 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1046 matroska->num_levels > 0 &&
1047 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1048 return 0; // we reached the end of an unknown size cluster
1049 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1050 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1052 return ebml_parse_elem(matroska, &syntax[i], data);
1055 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1058 if (!matroska->current_id) {
1060 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1062 // in live mode, finish parsing if EOF is reached.
1063 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1064 res == AVERROR_EOF) ? 1 : res;
1066 matroska->current_id = id | 1 << 7 * res;
1068 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1071 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1076 for (i = 0; syntax[i].id; i++)
1077 switch (syntax[i].type) {
1079 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1082 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1085 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1089 // the default may be NULL
1090 if (syntax[i].def.s) {
1091 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1092 *dst = av_strdup(syntax[i].def.s);
1094 return AVERROR(ENOMEM);
1099 while (!res && !ebml_level_end(matroska))
1100 res = ebml_parse(matroska, syntax, data);
1105 static int is_ebml_id_valid(uint32_t id)
1107 // Due to endian nonsense in Matroska, the highest byte with any bits set
1108 // will contain the leading length bit. This bit in turn identifies the
1109 // total byte length of the element by its position within the byte.
1110 unsigned int bits = av_log2(id);
1111 return id && (bits + 7) / 8 == (8 - bits % 8);
1115 * Allocate and return the entry for the level1 element with the given ID. If
1116 * an entry already exists, return the existing entry.
1118 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1122 MatroskaLevel1Element *elem;
1124 if (!is_ebml_id_valid(id))
1127 // Some files link to all clusters; useless.
1128 if (id == MATROSKA_ID_CLUSTER)
1131 // There can be multiple seekheads.
1132 if (id != MATROSKA_ID_SEEKHEAD) {
1133 for (i = 0; i < matroska->num_level1_elems; i++) {
1134 if (matroska->level1_elems[i].id == id)
1135 return &matroska->level1_elems[i];
1139 // Only a completely broken file would have more elements.
1140 // It also provides a low-effort way to escape from circular seekheads
1141 // (every iteration will add a level1 entry).
1142 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1143 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1147 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1148 *elem = (MatroskaLevel1Element){.id = id};
1153 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1154 EbmlSyntax *syntax, void *data)
1156 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1159 // max. 16 MB for strings
1160 [EBML_STR] = 0x1000000,
1161 [EBML_UTF8] = 0x1000000,
1162 // max. 256 MB for binary data
1163 [EBML_BIN] = 0x10000000,
1164 // no limits for anything else
1166 AVIOContext *pb = matroska->ctx->pb;
1167 uint32_t id = syntax->id;
1171 MatroskaLevel1Element *level1_elem;
1173 data = (char *) data + syntax->data_offset;
1174 if (syntax->list_elem_size) {
1175 EbmlList *list = data;
1176 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1178 return AVERROR(ENOMEM);
1179 list->elem = newelem;
1180 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1181 memset(data, 0, syntax->list_elem_size);
1185 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1186 matroska->current_id = 0;
1187 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1189 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1190 av_log(matroska->ctx, AV_LOG_ERROR,
1191 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1192 length, max_lengths[syntax->type], syntax->type);
1193 return AVERROR_INVALIDDATA;
1197 switch (syntax->type) {
1199 res = ebml_read_uint(pb, length, data);
1202 res = ebml_read_sint(pb, length, data);
1205 res = ebml_read_float(pb, length, data);
1209 res = ebml_read_ascii(pb, length, data);
1212 res = ebml_read_binary(pb, length, data);
1216 if ((res = ebml_read_master(matroska, length)) < 0)
1218 if (id == MATROSKA_ID_SEGMENT)
1219 matroska->segment_start = avio_tell(matroska->ctx->pb);
1220 if (id == MATROSKA_ID_CUES)
1221 matroska->cues_parsing_deferred = 0;
1222 if (syntax->type == EBML_LEVEL1 &&
1223 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1224 if (level1_elem->parsed)
1225 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1226 level1_elem->parsed = 1;
1228 return ebml_parse_nest(matroska, syntax->def.n, data);
1230 return ebml_parse_id(matroska, syntax->def.n, id, data);
1234 if (ffio_limit(pb, length) != length)
1235 return AVERROR(EIO);
1236 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1238 if (res == AVERROR_INVALIDDATA)
1239 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1240 else if (res == AVERROR(EIO))
1241 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1245 static void ebml_free(EbmlSyntax *syntax, void *data)
1248 for (i = 0; syntax[i].id; i++) {
1249 void *data_off = (char *) data + syntax[i].data_offset;
1250 switch (syntax[i].type) {
1256 av_freep(&((EbmlBin *) data_off)->data);
1260 if (syntax[i].list_elem_size) {
1261 EbmlList *list = data_off;
1262 char *ptr = list->elem;
1263 for (j = 0; j < list->nb_elem;
1264 j++, ptr += syntax[i].list_elem_size)
1265 ebml_free(syntax[i].def.n, ptr);
1266 av_freep(&list->elem);
1269 ebml_free(syntax[i].def.n, data_off);
1279 static int matroska_probe(AVProbeData *p)
1282 int len_mask = 0x80, size = 1, n = 1, i;
1285 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1288 /* length of header */
1290 while (size <= 8 && !(total & len_mask)) {
1296 total &= (len_mask - 1);
1298 total = (total << 8) | p->buf[4 + n++];
1300 /* Does the probe data contain the whole header? */
1301 if (p->buf_size < 4 + size + total)
1304 /* The header should contain a known document type. For now,
1305 * we don't parse the whole header but simply check for the
1306 * availability of that array of characters inside the header.
1307 * Not fully fool-proof, but good enough. */
1308 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1309 size_t probelen = strlen(matroska_doctypes[i]);
1310 if (total < probelen)
1312 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1313 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1314 return AVPROBE_SCORE_MAX;
1317 // probably valid EBML header but no recognized doctype
1318 return AVPROBE_SCORE_EXTENSION;
1321 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1324 MatroskaTrack *tracks = matroska->tracks.elem;
1327 for (i = 0; i < matroska->tracks.nb_elem; i++)
1328 if (tracks[i].num == num)
1331 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1335 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1336 MatroskaTrack *track)
1338 MatroskaTrackEncoding *encodings = track->encodings.elem;
1339 uint8_t *data = *buf;
1340 int isize = *buf_size;
1341 uint8_t *pkt_data = NULL;
1342 uint8_t av_unused *newpktdata;
1343 int pkt_size = isize;
1347 if (pkt_size >= 10000000U)
1348 return AVERROR_INVALIDDATA;
1350 switch (encodings[0].compression.algo) {
1351 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1353 int header_size = encodings[0].compression.settings.size;
1354 uint8_t *header = encodings[0].compression.settings.data;
1356 if (header_size && !header) {
1357 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1364 pkt_size = isize + header_size;
1365 pkt_data = av_malloc(pkt_size);
1367 return AVERROR(ENOMEM);
1369 memcpy(pkt_data, header, header_size);
1370 memcpy(pkt_data + header_size, data, isize);
1374 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1376 olen = pkt_size *= 3;
1377 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1379 result = AVERROR(ENOMEM);
1382 pkt_data = newpktdata;
1383 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1384 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1386 result = AVERROR_INVALIDDATA;
1393 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1395 z_stream zstream = { 0 };
1396 if (inflateInit(&zstream) != Z_OK)
1398 zstream.next_in = data;
1399 zstream.avail_in = isize;
1402 newpktdata = av_realloc(pkt_data, pkt_size);
1404 inflateEnd(&zstream);
1405 result = AVERROR(ENOMEM);
1408 pkt_data = newpktdata;
1409 zstream.avail_out = pkt_size - zstream.total_out;
1410 zstream.next_out = pkt_data + zstream.total_out;
1411 result = inflate(&zstream, Z_NO_FLUSH);
1412 } while (result == Z_OK && pkt_size < 10000000);
1413 pkt_size = zstream.total_out;
1414 inflateEnd(&zstream);
1415 if (result != Z_STREAM_END) {
1416 if (result == Z_MEM_ERROR)
1417 result = AVERROR(ENOMEM);
1419 result = AVERROR_INVALIDDATA;
1426 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1428 bz_stream bzstream = { 0 };
1429 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1431 bzstream.next_in = data;
1432 bzstream.avail_in = isize;
1435 newpktdata = av_realloc(pkt_data, pkt_size);
1437 BZ2_bzDecompressEnd(&bzstream);
1438 result = AVERROR(ENOMEM);
1441 pkt_data = newpktdata;
1442 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1443 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1444 result = BZ2_bzDecompress(&bzstream);
1445 } while (result == BZ_OK && pkt_size < 10000000);
1446 pkt_size = bzstream.total_out_lo32;
1447 BZ2_bzDecompressEnd(&bzstream);
1448 if (result != BZ_STREAM_END) {
1449 if (result == BZ_MEM_ERROR)
1450 result = AVERROR(ENOMEM);
1452 result = AVERROR_INVALIDDATA;
1459 return AVERROR_INVALIDDATA;
1463 *buf_size = pkt_size;
1471 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1472 AVDictionary **metadata, char *prefix)
1474 MatroskaTag *tags = list->elem;
1478 for (i = 0; i < list->nb_elem; i++) {
1479 const char *lang = tags[i].lang &&
1480 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1482 if (!tags[i].name) {
1483 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1487 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1489 av_strlcpy(key, tags[i].name, sizeof(key));
1490 if (tags[i].def || !lang) {
1491 av_dict_set(metadata, key, tags[i].string, 0);
1492 if (tags[i].sub.nb_elem)
1493 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1496 av_strlcat(key, "-", sizeof(key));
1497 av_strlcat(key, lang, sizeof(key));
1498 av_dict_set(metadata, key, tags[i].string, 0);
1499 if (tags[i].sub.nb_elem)
1500 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1503 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1506 static void matroska_convert_tags(AVFormatContext *s)
1508 MatroskaDemuxContext *matroska = s->priv_data;
1509 MatroskaTags *tags = matroska->tags.elem;
1512 for (i = 0; i < matroska->tags.nb_elem; i++) {
1513 if (tags[i].target.attachuid) {
1514 MatroskaAttachment *attachment = matroska->attachments.elem;
1516 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1517 if (attachment[j].uid == tags[i].target.attachuid &&
1518 attachment[j].stream) {
1519 matroska_convert_tag(s, &tags[i].tag,
1520 &attachment[j].stream->metadata, NULL);
1525 av_log(NULL, AV_LOG_WARNING,
1526 "The tags at index %d refer to a "
1527 "non-existent attachment %"PRId64".\n",
1528 i, tags[i].target.attachuid);
1530 } else if (tags[i].target.chapteruid) {
1531 MatroskaChapter *chapter = matroska->chapters.elem;
1533 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1534 if (chapter[j].uid == tags[i].target.chapteruid &&
1535 chapter[j].chapter) {
1536 matroska_convert_tag(s, &tags[i].tag,
1537 &chapter[j].chapter->metadata, NULL);
1542 av_log(NULL, AV_LOG_WARNING,
1543 "The tags at index %d refer to a non-existent chapter "
1545 i, tags[i].target.chapteruid);
1547 } else if (tags[i].target.trackuid) {
1548 MatroskaTrack *track = matroska->tracks.elem;
1550 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1551 if (track[j].uid == tags[i].target.trackuid &&
1553 matroska_convert_tag(s, &tags[i].tag,
1554 &track[j].stream->metadata, NULL);
1559 av_log(NULL, AV_LOG_WARNING,
1560 "The tags at index %d refer to a non-existent track "
1562 i, tags[i].target.trackuid);
1565 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1566 tags[i].target.type);
1571 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1574 uint32_t level_up = matroska->level_up;
1575 uint32_t saved_id = matroska->current_id;
1576 int64_t before_pos = avio_tell(matroska->ctx->pb);
1577 MatroskaLevel level;
1582 offset = pos + matroska->segment_start;
1583 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1584 /* We don't want to lose our seekhead level, so we add
1585 * a dummy. This is a crude hack. */
1586 if (matroska->num_levels == EBML_MAX_DEPTH) {
1587 av_log(matroska->ctx, AV_LOG_INFO,
1588 "Max EBML element depth (%d) reached, "
1589 "cannot parse further.\n", EBML_MAX_DEPTH);
1590 ret = AVERROR_INVALIDDATA;
1593 level.length = (uint64_t) -1;
1594 matroska->levels[matroska->num_levels] = level;
1595 matroska->num_levels++;
1596 matroska->current_id = 0;
1598 ret = ebml_parse(matroska, matroska_segment, matroska);
1600 /* remove dummy level */
1601 while (matroska->num_levels) {
1602 uint64_t length = matroska->levels[--matroska->num_levels].length;
1603 if (length == (uint64_t) -1)
1609 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1610 matroska->level_up = level_up;
1611 matroska->current_id = saved_id;
1616 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1618 EbmlList *seekhead_list = &matroska->seekhead;
1621 // we should not do any seeking in the streaming case
1622 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1625 for (i = 0; i < seekhead_list->nb_elem; i++) {
1626 MatroskaSeekhead *seekheads = seekhead_list->elem;
1627 uint32_t id = seekheads[i].id;
1628 uint64_t pos = seekheads[i].pos;
1630 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1631 if (!elem || elem->parsed)
1636 // defer cues parsing until we actually need cue data.
1637 if (id == MATROSKA_ID_CUES)
1640 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1641 // mark index as broken
1642 matroska->cues_parsing_deferred = -1;
1650 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1652 EbmlList *index_list;
1653 MatroskaIndex *index;
1654 uint64_t index_scale = 1;
1657 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1660 index_list = &matroska->index;
1661 index = index_list->elem;
1662 if (index_list->nb_elem < 2)
1664 if (index[1].time > 1E14 / matroska->time_scale) {
1665 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1668 for (i = 0; i < index_list->nb_elem; i++) {
1669 EbmlList *pos_list = &index[i].pos;
1670 MatroskaIndexPos *pos = pos_list->elem;
1671 for (j = 0; j < pos_list->nb_elem; j++) {
1672 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1674 if (track && track->stream)
1675 av_add_index_entry(track->stream,
1676 pos[j].pos + matroska->segment_start,
1677 index[i].time / index_scale, 0, 0,
1683 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1686 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1689 for (i = 0; i < matroska->num_level1_elems; i++) {
1690 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1691 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1692 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1693 matroska->cues_parsing_deferred = -1;
1699 matroska_add_index_entries(matroska);
1702 static int matroska_aac_profile(char *codec_id)
1704 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1707 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1708 if (strstr(codec_id, aac_profiles[profile]))
1713 static int matroska_aac_sri(int samplerate)
1717 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1718 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1723 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1725 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1726 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1729 static int matroska_parse_flac(AVFormatContext *s,
1730 MatroskaTrack *track,
1733 AVStream *st = track->stream;
1734 uint8_t *p = track->codec_priv.data;
1735 int size = track->codec_priv.size;
1737 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1738 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1739 track->codec_priv.size = 0;
1743 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1745 p += track->codec_priv.size;
1746 size -= track->codec_priv.size;
1748 /* parse the remaining metadata blocks if present */
1750 int block_last, block_type, block_size;
1752 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1756 if (block_size > size)
1759 /* check for the channel mask */
1760 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1761 AVDictionary *dict = NULL;
1762 AVDictionaryEntry *chmask;
1764 ff_vorbis_comment(s, &dict, p, block_size, 0);
1765 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1767 uint64_t mask = strtol(chmask->value, NULL, 0);
1768 if (!mask || mask & ~0x3ffffULL) {
1769 av_log(s, AV_LOG_WARNING,
1770 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1772 st->codecpar->channel_layout = mask;
1774 av_dict_free(&dict);
1784 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1786 int major, minor, micro, bttb = 0;
1788 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1789 * this function, and fixed in 57.52 */
1790 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1791 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1793 switch (field_order) {
1794 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1795 return AV_FIELD_PROGRESSIVE;
1796 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1797 return AV_FIELD_UNKNOWN;
1798 case MATROSKA_VIDEO_FIELDORDER_TT:
1800 case MATROSKA_VIDEO_FIELDORDER_BB:
1802 case MATROSKA_VIDEO_FIELDORDER_BT:
1803 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1804 case MATROSKA_VIDEO_FIELDORDER_TB:
1805 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1807 return AV_FIELD_UNKNOWN;
1811 static void mkv_stereo_mode_display_mul(int stereo_mode,
1812 int *h_width, int *h_height)
1814 switch (stereo_mode) {
1815 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1816 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1817 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1818 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1819 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1821 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1822 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1823 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1824 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1827 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1828 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1829 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1830 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1836 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1837 const MatroskaTrackVideoColor *color = track->video.color.elem;
1838 const MatroskaMasteringMeta *mastering_meta;
1839 int has_mastering_primaries, has_mastering_luminance;
1841 if (!track->video.color.nb_elem)
1844 mastering_meta = &color->mastering_meta;
1845 // Mastering primaries are CIE 1931 coords, and must be > 0.
1846 has_mastering_primaries =
1847 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1848 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1849 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1850 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1851 has_mastering_luminance = mastering_meta->max_luminance > 0;
1853 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1854 st->codecpar->color_space = color->matrix_coefficients;
1855 if (color->primaries != AVCOL_PRI_RESERVED &&
1856 color->primaries != AVCOL_PRI_RESERVED0)
1857 st->codecpar->color_primaries = color->primaries;
1858 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1859 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1860 st->codecpar->color_trc = color->transfer_characteristics;
1861 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1862 color->range <= AVCOL_RANGE_JPEG)
1863 st->codecpar->color_range = color->range;
1864 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1865 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1866 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1867 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1868 st->codecpar->chroma_location =
1869 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1870 (color->chroma_siting_vert - 1) << 7);
1872 if (color->max_cll && color->max_fall) {
1875 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1877 return AVERROR(ENOMEM);
1878 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1879 (uint8_t *)metadata, size);
1881 av_freep(&metadata);
1884 metadata->MaxCLL = color->max_cll;
1885 metadata->MaxFALL = color->max_fall;
1888 if (has_mastering_primaries || has_mastering_luminance) {
1889 // Use similar rationals as other standards.
1890 const int chroma_den = 50000;
1891 const int luma_den = 10000;
1892 AVMasteringDisplayMetadata *metadata =
1893 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1894 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1895 sizeof(AVMasteringDisplayMetadata));
1897 return AVERROR(ENOMEM);
1899 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1900 if (has_mastering_primaries) {
1901 metadata->display_primaries[0][0] = av_make_q(
1902 round(mastering_meta->r_x * chroma_den), chroma_den);
1903 metadata->display_primaries[0][1] = av_make_q(
1904 round(mastering_meta->r_y * chroma_den), chroma_den);
1905 metadata->display_primaries[1][0] = av_make_q(
1906 round(mastering_meta->g_x * chroma_den), chroma_den);
1907 metadata->display_primaries[1][1] = av_make_q(
1908 round(mastering_meta->g_y * chroma_den), chroma_den);
1909 metadata->display_primaries[2][0] = av_make_q(
1910 round(mastering_meta->b_x * chroma_den), chroma_den);
1911 metadata->display_primaries[2][1] = av_make_q(
1912 round(mastering_meta->b_y * chroma_den), chroma_den);
1913 metadata->white_point[0] = av_make_q(
1914 round(mastering_meta->white_x * chroma_den), chroma_den);
1915 metadata->white_point[1] = av_make_q(
1916 round(mastering_meta->white_y * chroma_den), chroma_den);
1917 metadata->has_primaries = 1;
1919 if (has_mastering_luminance) {
1920 metadata->max_luminance = av_make_q(
1921 round(mastering_meta->max_luminance * luma_den), luma_den);
1922 metadata->min_luminance = av_make_q(
1923 round(mastering_meta->min_luminance * luma_den), luma_den);
1924 metadata->has_luminance = 1;
1930 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1931 AVSphericalMapping *spherical;
1932 enum AVSphericalProjection projection;
1933 size_t spherical_size;
1934 uint32_t l = 0, t = 0, r = 0, b = 0;
1935 uint32_t padding = 0;
1939 bytestream2_init(&gb, track->video.projection.private.data,
1940 track->video.projection.private.size);
1942 if (bytestream2_get_byte(&gb) != 0) {
1943 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1947 bytestream2_skip(&gb, 3); // flags
1949 switch (track->video.projection.type) {
1950 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1951 if (track->video.projection.private.size == 20) {
1952 t = bytestream2_get_be32(&gb);
1953 b = bytestream2_get_be32(&gb);
1954 l = bytestream2_get_be32(&gb);
1955 r = bytestream2_get_be32(&gb);
1957 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1958 av_log(NULL, AV_LOG_ERROR,
1959 "Invalid bounding rectangle coordinates "
1960 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1962 return AVERROR_INVALIDDATA;
1964 } else if (track->video.projection.private.size != 0) {
1965 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1966 return AVERROR_INVALIDDATA;
1969 if (l || t || r || b)
1970 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1972 projection = AV_SPHERICAL_EQUIRECTANGULAR;
1974 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
1975 if (track->video.projection.private.size < 4) {
1976 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1977 return AVERROR_INVALIDDATA;
1978 } else if (track->video.projection.private.size == 12) {
1979 uint32_t layout = bytestream2_get_be32(&gb);
1981 av_log(NULL, AV_LOG_WARNING,
1982 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1985 projection = AV_SPHERICAL_CUBEMAP;
1986 padding = bytestream2_get_be32(&gb);
1988 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1989 return AVERROR_INVALIDDATA;
1992 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
1993 /* No Spherical metadata */
1996 av_log(NULL, AV_LOG_WARNING,
1997 "Unknown spherical metadata type %"PRIu64"\n",
1998 track->video.projection.type);
2002 spherical = av_spherical_alloc(&spherical_size);
2004 return AVERROR(ENOMEM);
2006 spherical->projection = projection;
2008 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2009 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2010 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2012 spherical->padding = padding;
2014 spherical->bound_left = l;
2015 spherical->bound_top = t;
2016 spherical->bound_right = r;
2017 spherical->bound_bottom = b;
2019 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2022 av_freep(&spherical);
2029 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2031 const AVCodecTag *codec_tags;
2033 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2034 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2036 /* Normalize noncompliant private data that starts with the fourcc
2037 * by expanding/shifting the data by 4 bytes and storing the data
2038 * size at the start. */
2039 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2040 uint8_t *p = av_realloc(track->codec_priv.data,
2041 track->codec_priv.size + 4);
2043 return AVERROR(ENOMEM);
2044 memmove(p + 4, p, track->codec_priv.size);
2045 track->codec_priv.data = p;
2046 track->codec_priv.size += 4;
2047 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2050 *fourcc = AV_RL32(track->codec_priv.data + 4);
2051 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2056 static int matroska_parse_tracks(AVFormatContext *s)
2058 MatroskaDemuxContext *matroska = s->priv_data;
2059 MatroskaTrack *tracks = matroska->tracks.elem;
2064 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2065 MatroskaTrack *track = &tracks[i];
2066 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2067 EbmlList *encodings_list = &track->encodings;
2068 MatroskaTrackEncoding *encodings = encodings_list->elem;
2069 uint8_t *extradata = NULL;
2070 int extradata_size = 0;
2071 int extradata_offset = 0;
2072 uint32_t fourcc = 0;
2074 char* key_id_base64 = NULL;
2077 /* Apply some sanity checks. */
2078 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2079 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2080 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2081 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2082 av_log(matroska->ctx, AV_LOG_INFO,
2083 "Unknown or unsupported track type %"PRIu64"\n",
2087 if (!track->codec_id)
2090 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2091 isnan(track->audio.samplerate)) {
2092 av_log(matroska->ctx, AV_LOG_WARNING,
2093 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2094 track->audio.samplerate);
2095 track->audio.samplerate = 8000;
2098 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2099 if (!track->default_duration && track->video.frame_rate > 0) {
2100 double default_duration = 1000000000 / track->video.frame_rate;
2101 if (default_duration > UINT64_MAX || default_duration < 0) {
2102 av_log(matroska->ctx, AV_LOG_WARNING,
2103 "Invalid frame rate %e. Cannot calculate default duration.\n",
2104 track->video.frame_rate);
2106 track->default_duration = default_duration;
2109 if (track->video.display_width == -1)
2110 track->video.display_width = track->video.pixel_width;
2111 if (track->video.display_height == -1)
2112 track->video.display_height = track->video.pixel_height;
2113 if (track->video.color_space.size == 4)
2114 fourcc = AV_RL32(track->video.color_space.data);
2115 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2116 if (!track->audio.out_samplerate)
2117 track->audio.out_samplerate = track->audio.samplerate;
2119 if (encodings_list->nb_elem > 1) {
2120 av_log(matroska->ctx, AV_LOG_ERROR,
2121 "Multiple combined encodings not supported");
2122 } else if (encodings_list->nb_elem == 1) {
2123 if (encodings[0].type) {
2124 if (encodings[0].encryption.key_id.size > 0) {
2125 /* Save the encryption key id to be stored later as a
2127 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2128 key_id_base64 = av_malloc(b64_size);
2129 if (key_id_base64 == NULL)
2130 return AVERROR(ENOMEM);
2132 av_base64_encode(key_id_base64, b64_size,
2133 encodings[0].encryption.key_id.data,
2134 encodings[0].encryption.key_id.size);
2136 encodings[0].scope = 0;
2137 av_log(matroska->ctx, AV_LOG_ERROR,
2138 "Unsupported encoding type");
2142 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2145 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2148 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2150 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2151 encodings[0].scope = 0;
2152 av_log(matroska->ctx, AV_LOG_ERROR,
2153 "Unsupported encoding type");
2154 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2155 uint8_t *codec_priv = track->codec_priv.data;
2156 int ret = matroska_decode_buffer(&track->codec_priv.data,
2157 &track->codec_priv.size,
2160 track->codec_priv.data = NULL;
2161 track->codec_priv.size = 0;
2162 av_log(matroska->ctx, AV_LOG_ERROR,
2163 "Failed to decode codec private data\n");
2166 if (codec_priv != track->codec_priv.data)
2167 av_free(codec_priv);
2171 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2172 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2173 strlen(ff_mkv_codec_tags[j].str))) {
2174 codec_id = ff_mkv_codec_tags[j].id;
2179 st = track->stream = avformat_new_stream(s, NULL);
2181 av_free(key_id_base64);
2182 return AVERROR(ENOMEM);
2185 if (key_id_base64) {
2186 /* export encryption key id as base64 metadata tag */
2187 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2188 av_freep(&key_id_base64);
2191 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2192 track->codec_priv.size >= 40 &&
2193 track->codec_priv.data) {
2194 track->ms_compat = 1;
2195 bit_depth = AV_RL16(track->codec_priv.data + 14);
2196 fourcc = AV_RL32(track->codec_priv.data + 16);
2197 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2200 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2202 extradata_offset = 40;
2203 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2204 track->codec_priv.size >= 14 &&
2205 track->codec_priv.data) {
2207 ffio_init_context(&b, track->codec_priv.data,
2208 track->codec_priv.size,
2209 0, NULL, NULL, NULL, NULL);
2210 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2213 codec_id = st->codecpar->codec_id;
2214 fourcc = st->codecpar->codec_tag;
2215 extradata_offset = FFMIN(track->codec_priv.size, 18);
2216 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2217 /* Normally 36, but allow noncompliant private data */
2218 && (track->codec_priv.size >= 32)
2219 && (track->codec_priv.data)) {
2220 uint16_t sample_size;
2221 int ret = get_qt_codec(track, &fourcc, &codec_id);
2224 sample_size = AV_RB16(track->codec_priv.data + 26);
2226 if (sample_size == 8) {
2227 fourcc = MKTAG('r','a','w',' ');
2228 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2229 } else if (sample_size == 16) {
2230 fourcc = MKTAG('t','w','o','s');
2231 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2234 if ((fourcc == MKTAG('t','w','o','s') ||
2235 fourcc == MKTAG('s','o','w','t')) &&
2237 codec_id = AV_CODEC_ID_PCM_S8;
2238 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2239 (track->codec_priv.size >= 21) &&
2240 (track->codec_priv.data)) {
2241 int ret = get_qt_codec(track, &fourcc, &codec_id);
2244 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2245 fourcc = MKTAG('S','V','Q','3');
2246 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2248 if (codec_id == AV_CODEC_ID_NONE)
2249 av_log(matroska->ctx, AV_LOG_ERROR,
2250 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2251 if (track->codec_priv.size >= 86) {
2252 bit_depth = AV_RB16(track->codec_priv.data + 82);
2253 ffio_init_context(&b, track->codec_priv.data,
2254 track->codec_priv.size,
2255 0, NULL, NULL, NULL, NULL);
2256 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2258 track->has_palette = 1;
2261 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2262 switch (track->audio.bitdepth) {
2264 codec_id = AV_CODEC_ID_PCM_U8;
2267 codec_id = AV_CODEC_ID_PCM_S24BE;
2270 codec_id = AV_CODEC_ID_PCM_S32BE;
2273 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2274 switch (track->audio.bitdepth) {
2276 codec_id = AV_CODEC_ID_PCM_U8;
2279 codec_id = AV_CODEC_ID_PCM_S24LE;
2282 codec_id = AV_CODEC_ID_PCM_S32LE;
2285 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2286 track->audio.bitdepth == 64) {
2287 codec_id = AV_CODEC_ID_PCM_F64LE;
2288 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2289 int profile = matroska_aac_profile(track->codec_id);
2290 int sri = matroska_aac_sri(track->audio.samplerate);
2291 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2293 return AVERROR(ENOMEM);
2294 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2295 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2296 if (strstr(track->codec_id, "SBR")) {
2297 sri = matroska_aac_sri(track->audio.out_samplerate);
2298 extradata[2] = 0x56;
2299 extradata[3] = 0xE5;
2300 extradata[4] = 0x80 | (sri << 3);
2304 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2305 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2306 * Create the "atom size", "tag", and "tag version" fields the
2307 * decoder expects manually. */
2308 extradata_size = 12 + track->codec_priv.size;
2309 extradata = av_mallocz(extradata_size +
2310 AV_INPUT_BUFFER_PADDING_SIZE);
2312 return AVERROR(ENOMEM);
2313 AV_WB32(extradata, extradata_size);
2314 memcpy(&extradata[4], "alac", 4);
2315 AV_WB32(&extradata[8], 0);
2316 memcpy(&extradata[12], track->codec_priv.data,
2317 track->codec_priv.size);
2318 } else if (codec_id == AV_CODEC_ID_TTA) {
2319 extradata_size = 30;
2320 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2322 return AVERROR(ENOMEM);
2323 ffio_init_context(&b, extradata, extradata_size, 1,
2324 NULL, NULL, NULL, NULL);
2325 avio_write(&b, "TTA1", 4);
2327 if (track->audio.channels > UINT16_MAX ||
2328 track->audio.bitdepth > UINT16_MAX) {
2329 av_log(matroska->ctx, AV_LOG_WARNING,
2330 "Too large audio channel number %"PRIu64
2331 " or bitdepth %"PRIu64". Skipping track.\n",
2332 track->audio.channels, track->audio.bitdepth);
2333 av_freep(&extradata);
2334 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2335 return AVERROR_INVALIDDATA;
2339 avio_wl16(&b, track->audio.channels);
2340 avio_wl16(&b, track->audio.bitdepth);
2341 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2342 return AVERROR_INVALIDDATA;
2343 avio_wl32(&b, track->audio.out_samplerate);
2344 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2345 track->audio.out_samplerate,
2346 AV_TIME_BASE * 1000));
2347 } else if (codec_id == AV_CODEC_ID_RV10 ||
2348 codec_id == AV_CODEC_ID_RV20 ||
2349 codec_id == AV_CODEC_ID_RV30 ||
2350 codec_id == AV_CODEC_ID_RV40) {
2351 extradata_offset = 26;
2352 } else if (codec_id == AV_CODEC_ID_RA_144) {
2353 track->audio.out_samplerate = 8000;
2354 track->audio.channels = 1;
2355 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2356 codec_id == AV_CODEC_ID_COOK ||
2357 codec_id == AV_CODEC_ID_ATRAC3 ||
2358 codec_id == AV_CODEC_ID_SIPR)
2359 && track->codec_priv.data) {
2362 ffio_init_context(&b, track->codec_priv.data,
2363 track->codec_priv.size,
2364 0, NULL, NULL, NULL, NULL);
2366 flavor = avio_rb16(&b);
2367 track->audio.coded_framesize = avio_rb32(&b);
2369 track->audio.sub_packet_h = avio_rb16(&b);
2370 track->audio.frame_size = avio_rb16(&b);
2371 track->audio.sub_packet_size = avio_rb16(&b);
2373 track->audio.coded_framesize <= 0 ||
2374 track->audio.sub_packet_h <= 0 ||
2375 track->audio.frame_size <= 0 ||
2376 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2377 return AVERROR_INVALIDDATA;
2378 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2379 track->audio.frame_size);
2380 if (!track->audio.buf)
2381 return AVERROR(ENOMEM);
2382 if (codec_id == AV_CODEC_ID_RA_288) {
2383 st->codecpar->block_align = track->audio.coded_framesize;
2384 track->codec_priv.size = 0;
2386 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2387 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2388 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2389 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2391 st->codecpar->block_align = track->audio.sub_packet_size;
2392 extradata_offset = 78;
2394 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2395 ret = matroska_parse_flac(s, track, &extradata_offset);
2398 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2399 fourcc = AV_RL32(track->codec_priv.data);
2401 track->codec_priv.size -= extradata_offset;
2403 if (codec_id == AV_CODEC_ID_NONE)
2404 av_log(matroska->ctx, AV_LOG_INFO,
2405 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2407 if (track->time_scale < 0.01)
2408 track->time_scale = 1.0;
2409 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2410 1000 * 1000 * 1000); /* 64 bit pts in ns */
2412 /* convert the delay from ns to the track timebase */
2413 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2414 (AVRational){ 1, 1000000000 },
2417 st->codecpar->codec_id = codec_id;
2419 if (strcmp(track->language, "und"))
2420 av_dict_set(&st->metadata, "language", track->language, 0);
2421 av_dict_set(&st->metadata, "title", track->name, 0);
2423 if (track->flag_default)
2424 st->disposition |= AV_DISPOSITION_DEFAULT;
2425 if (track->flag_forced)
2426 st->disposition |= AV_DISPOSITION_FORCED;
2428 if (!st->codecpar->extradata) {
2430 st->codecpar->extradata = extradata;
2431 st->codecpar->extradata_size = extradata_size;
2432 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2433 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2434 return AVERROR(ENOMEM);
2435 memcpy(st->codecpar->extradata,
2436 track->codec_priv.data + extradata_offset,
2437 track->codec_priv.size);
2441 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2442 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2443 int display_width_mul = 1;
2444 int display_height_mul = 1;
2446 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2447 st->codecpar->codec_tag = fourcc;
2449 st->codecpar->bits_per_coded_sample = bit_depth;
2450 st->codecpar->width = track->video.pixel_width;
2451 st->codecpar->height = track->video.pixel_height;
2453 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2454 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2455 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2456 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2458 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2459 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2461 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2462 av_reduce(&st->sample_aspect_ratio.num,
2463 &st->sample_aspect_ratio.den,
2464 st->codecpar->height * track->video.display_width * display_width_mul,
2465 st->codecpar->width * track->video.display_height * display_height_mul,
2468 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2469 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2471 if (track->default_duration) {
2472 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2473 1000000000, track->default_duration, 30000);
2474 #if FF_API_R_FRAME_RATE
2475 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2476 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2477 st->r_frame_rate = st->avg_frame_rate;
2481 /* export stereo mode flag as metadata tag */
2482 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2483 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2485 /* export alpha mode flag as metadata tag */
2486 if (track->video.alpha_mode)
2487 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2489 /* if we have virtual track, mark the real tracks */
2490 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2492 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2494 snprintf(buf, sizeof(buf), "%s_%d",
2495 ff_matroska_video_stereo_plane[planes[j].type], i);
2496 for (k=0; k < matroska->tracks.nb_elem; k++)
2497 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2498 av_dict_set(&tracks[k].stream->metadata,
2499 "stereo_mode", buf, 0);
2503 // add stream level stereo3d side data if it is a supported format
2504 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2505 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2506 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2511 ret = mkv_parse_video_color(st, track);
2514 ret = mkv_parse_video_projection(st, track);
2517 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2518 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2519 st->codecpar->codec_tag = fourcc;
2520 st->codecpar->sample_rate = track->audio.out_samplerate;
2521 st->codecpar->channels = track->audio.channels;
2522 if (!st->codecpar->bits_per_coded_sample)
2523 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2524 if (st->codecpar->codec_id == AV_CODEC_ID_MP3)
2525 st->need_parsing = AVSTREAM_PARSE_FULL;
2526 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2527 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2528 if (track->codec_delay > 0) {
2529 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2530 (AVRational){1, 1000000000},
2531 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2532 48000 : st->codecpar->sample_rate});
2534 if (track->seek_preroll > 0) {
2535 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2536 (AVRational){1, 1000000000},
2537 (AVRational){1, st->codecpar->sample_rate});
2539 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2540 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2542 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2543 st->disposition |= AV_DISPOSITION_CAPTIONS;
2544 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2545 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2546 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2547 st->disposition |= AV_DISPOSITION_METADATA;
2549 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2550 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2551 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2552 matroska->contains_ssa = 1;
2559 static int matroska_read_header(AVFormatContext *s)
2561 MatroskaDemuxContext *matroska = s->priv_data;
2562 EbmlList *attachments_list = &matroska->attachments;
2563 EbmlList *chapters_list = &matroska->chapters;
2564 MatroskaAttachment *attachments;
2565 MatroskaChapter *chapters;
2566 uint64_t max_start = 0;
2572 matroska->cues_parsing_deferred = 1;
2574 /* First read the EBML header. */
2575 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2576 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2577 ebml_free(ebml_syntax, &ebml);
2578 return AVERROR_INVALIDDATA;
2580 if (ebml.version > EBML_VERSION ||
2581 ebml.max_size > sizeof(uint64_t) ||
2582 ebml.id_length > sizeof(uint32_t) ||
2583 ebml.doctype_version > 3) {
2584 avpriv_report_missing_feature(matroska->ctx,
2585 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2586 ebml.version, ebml.doctype, ebml.doctype_version);
2587 ebml_free(ebml_syntax, &ebml);
2588 return AVERROR_PATCHWELCOME;
2589 } else if (ebml.doctype_version == 3) {
2590 av_log(matroska->ctx, AV_LOG_WARNING,
2591 "EBML header using unsupported features\n"
2592 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2593 ebml.version, ebml.doctype, ebml.doctype_version);
2595 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2596 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2598 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2599 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2600 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2601 ebml_free(ebml_syntax, &ebml);
2602 return AVERROR_INVALIDDATA;
2605 ebml_free(ebml_syntax, &ebml);
2607 /* The next thing is a segment. */
2608 pos = avio_tell(matroska->ctx->pb);
2609 res = ebml_parse(matroska, matroska_segments, matroska);
2610 // try resyncing until we find a EBML_STOP type element.
2612 res = matroska_resync(matroska, pos);
2615 pos = avio_tell(matroska->ctx->pb);
2616 res = ebml_parse(matroska, matroska_segment, matroska);
2618 matroska_execute_seekhead(matroska);
2620 if (!matroska->time_scale)
2621 matroska->time_scale = 1000000;
2622 if (matroska->duration)
2623 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2624 1000 / AV_TIME_BASE;
2625 av_dict_set(&s->metadata, "title", matroska->title, 0);
2626 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2628 if (matroska->date_utc.size == 8)
2629 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2631 res = matroska_parse_tracks(s);
2635 attachments = attachments_list->elem;
2636 for (j = 0; j < attachments_list->nb_elem; j++) {
2637 if (!(attachments[j].filename && attachments[j].mime &&
2638 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2639 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2641 AVStream *st = avformat_new_stream(s, NULL);
2644 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2645 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2646 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2648 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2649 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2650 strlen(ff_mkv_image_mime_tags[i].str))) {
2651 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2656 attachments[j].stream = st;
2658 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2659 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2660 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2662 av_init_packet(&st->attached_pic);
2663 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2665 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2666 st->attached_pic.stream_index = st->index;
2667 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2669 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2670 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2672 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2673 attachments[j].bin.size);
2675 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2676 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2677 strlen(ff_mkv_mime_tags[i].str))) {
2678 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2686 chapters = chapters_list->elem;
2687 for (i = 0; i < chapters_list->nb_elem; i++)
2688 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2689 (max_start == 0 || chapters[i].start > max_start)) {
2690 chapters[i].chapter =
2691 avpriv_new_chapter(s, chapters[i].uid,
2692 (AVRational) { 1, 1000000000 },
2693 chapters[i].start, chapters[i].end,
2695 if (chapters[i].chapter) {
2696 av_dict_set(&chapters[i].chapter->metadata,
2697 "title", chapters[i].title, 0);
2699 max_start = chapters[i].start;
2702 matroska_add_index_entries(matroska);
2704 matroska_convert_tags(s);
2708 matroska_read_close(s);
2713 * Put one packet in an application-supplied AVPacket struct.
2714 * Returns 0 on success or -1 on failure.
2716 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2719 if (matroska->num_packets > 0) {
2720 MatroskaTrack *tracks = matroska->tracks.elem;
2721 MatroskaTrack *track;
2722 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
2723 av_freep(&matroska->packets[0]);
2724 track = &tracks[pkt->stream_index];
2725 if (track->has_palette) {
2726 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2728 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2730 memcpy(pal, track->palette, AVPALETTE_SIZE);
2732 track->has_palette = 0;
2734 if (matroska->num_packets > 1) {
2736 memmove(&matroska->packets[0], &matroska->packets[1],
2737 (matroska->num_packets - 1) * sizeof(AVPacket *));
2738 newpackets = av_realloc(matroska->packets,
2739 (matroska->num_packets - 1) *
2740 sizeof(AVPacket *));
2742 matroska->packets = newpackets;
2744 av_freep(&matroska->packets);
2745 matroska->prev_pkt = NULL;
2747 matroska->num_packets--;
2755 * Free all packets in our internal queue.
2757 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2759 matroska->prev_pkt = NULL;
2760 if (matroska->packets) {
2762 for (n = 0; n < matroska->num_packets; n++) {
2763 av_packet_unref(matroska->packets[n]);
2764 av_freep(&matroska->packets[n]);
2766 av_freep(&matroska->packets);
2767 matroska->num_packets = 0;
2771 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2772 int *buf_size, int type,
2773 uint32_t **lace_buf, int *laces)
2775 int res = 0, n, size = *buf_size;
2776 uint8_t *data = *buf;
2777 uint32_t *lace_size;
2781 *lace_buf = av_mallocz(sizeof(int));
2783 return AVERROR(ENOMEM);
2785 *lace_buf[0] = size;
2789 av_assert0(size > 0);
2793 lace_size = av_mallocz(*laces * sizeof(int));
2795 return AVERROR(ENOMEM);
2798 case 0x1: /* Xiph lacing */
2802 for (n = 0; res == 0 && n < *laces - 1; n++) {
2804 if (size <= total) {
2805 res = AVERROR_INVALIDDATA;
2810 lace_size[n] += temp;
2817 if (size <= total) {
2818 res = AVERROR_INVALIDDATA;
2822 lace_size[n] = size - total;
2826 case 0x2: /* fixed-size lacing */
2827 if (size % (*laces)) {
2828 res = AVERROR_INVALIDDATA;
2831 for (n = 0; n < *laces; n++)
2832 lace_size[n] = size / *laces;
2835 case 0x3: /* EBML lacing */
2839 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2840 if (n < 0 || num > INT_MAX) {
2841 av_log(matroska->ctx, AV_LOG_INFO,
2842 "EBML block data error\n");
2843 res = n<0 ? n : AVERROR_INVALIDDATA;
2848 total = lace_size[0] = num;
2849 for (n = 1; res == 0 && n < *laces - 1; n++) {
2852 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2853 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2854 av_log(matroska->ctx, AV_LOG_INFO,
2855 "EBML block data error\n");
2856 res = r<0 ? r : AVERROR_INVALIDDATA;
2861 lace_size[n] = lace_size[n - 1] + snum;
2862 total += lace_size[n];
2864 if (size <= total) {
2865 res = AVERROR_INVALIDDATA;
2868 lace_size[*laces - 1] = size - total;
2874 *lace_buf = lace_size;
2880 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2881 MatroskaTrack *track, AVStream *st,
2882 uint8_t *data, int size, uint64_t timecode,
2885 int a = st->codecpar->block_align;
2886 int sps = track->audio.sub_packet_size;
2887 int cfs = track->audio.coded_framesize;
2888 int h = track->audio.sub_packet_h;
2889 int y = track->audio.sub_packet_cnt;
2890 int w = track->audio.frame_size;
2893 if (!track->audio.pkt_cnt) {
2894 if (track->audio.sub_packet_cnt == 0)
2895 track->audio.buf_timecode = timecode;
2896 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2897 if (size < cfs * h / 2) {
2898 av_log(matroska->ctx, AV_LOG_ERROR,
2899 "Corrupt int4 RM-style audio packet size\n");
2900 return AVERROR_INVALIDDATA;
2902 for (x = 0; x < h / 2; x++)
2903 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2904 data + x * cfs, cfs);
2905 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2907 av_log(matroska->ctx, AV_LOG_ERROR,
2908 "Corrupt sipr RM-style audio packet size\n");
2909 return AVERROR_INVALIDDATA;
2911 memcpy(track->audio.buf + y * w, data, w);
2913 if (size < sps * w / sps || h<=0 || w%sps) {
2914 av_log(matroska->ctx, AV_LOG_ERROR,
2915 "Corrupt generic RM-style audio packet size\n");
2916 return AVERROR_INVALIDDATA;
2918 for (x = 0; x < w / sps; x++)
2919 memcpy(track->audio.buf +
2920 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2921 data + x * sps, sps);
2924 if (++track->audio.sub_packet_cnt >= h) {
2925 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2926 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2927 track->audio.sub_packet_cnt = 0;
2928 track->audio.pkt_cnt = h * w / a;
2932 while (track->audio.pkt_cnt) {
2934 AVPacket *pkt = av_mallocz(sizeof(AVPacket));
2936 return AVERROR(ENOMEM);
2938 ret = av_new_packet(pkt, a);
2944 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2946 pkt->pts = track->audio.buf_timecode;
2947 track->audio.buf_timecode = AV_NOPTS_VALUE;
2949 pkt->stream_index = st->index;
2950 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
2956 /* reconstruct full wavpack blocks from mangled matroska ones */
2957 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2958 uint8_t **pdst, int *size)
2960 uint8_t *dst = NULL;
2965 int ret, offset = 0;
2967 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2968 return AVERROR_INVALIDDATA;
2970 ver = AV_RL16(track->stream->codecpar->extradata);
2972 samples = AV_RL32(src);
2976 while (srclen >= 8) {
2981 uint32_t flags = AV_RL32(src);
2982 uint32_t crc = AV_RL32(src + 4);
2986 multiblock = (flags & 0x1800) != 0x1800;
2989 ret = AVERROR_INVALIDDATA;
2992 blocksize = AV_RL32(src);
2998 if (blocksize > srclen) {
2999 ret = AVERROR_INVALIDDATA;
3003 tmp = av_realloc(dst, dstlen + blocksize + 32);
3005 ret = AVERROR(ENOMEM);
3009 dstlen += blocksize + 32;
3011 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3012 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3013 AV_WL16(dst + offset + 8, ver); // version
3014 AV_WL16(dst + offset + 10, 0); // track/index_no
3015 AV_WL32(dst + offset + 12, 0); // total samples
3016 AV_WL32(dst + offset + 16, 0); // block index
3017 AV_WL32(dst + offset + 20, samples); // number of samples
3018 AV_WL32(dst + offset + 24, flags); // flags
3019 AV_WL32(dst + offset + 28, crc); // crc
3020 memcpy(dst + offset + 32, src, blocksize); // block data
3023 srclen -= blocksize;
3024 offset += blocksize + 32;
3037 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3038 MatroskaTrack *track,
3040 uint8_t *data, int data_len,
3046 uint8_t *id, *settings, *text, *buf;
3047 int id_len, settings_len, text_len;
3052 return AVERROR_INVALIDDATA;
3055 q = data + data_len;
3060 if (*p == '\r' || *p == '\n') {
3069 if (p >= q || *p != '\n')
3070 return AVERROR_INVALIDDATA;
3076 if (*p == '\r' || *p == '\n') {
3077 settings_len = p - settings;
3085 if (p >= q || *p != '\n')
3086 return AVERROR_INVALIDDATA;
3091 while (text_len > 0) {
3092 const int len = text_len - 1;
3093 const uint8_t c = p[len];
3094 if (c != '\r' && c != '\n')
3100 return AVERROR_INVALIDDATA;
3102 pkt = av_mallocz(sizeof(*pkt));
3104 return AVERROR(ENOMEM);
3105 err = av_new_packet(pkt, text_len);
3108 return AVERROR(err);
3111 memcpy(pkt->data, text, text_len);
3114 buf = av_packet_new_side_data(pkt,
3115 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3119 return AVERROR(ENOMEM);
3121 memcpy(buf, id, id_len);
3124 if (settings_len > 0) {
3125 buf = av_packet_new_side_data(pkt,
3126 AV_PKT_DATA_WEBVTT_SETTINGS,
3130 return AVERROR(ENOMEM);
3132 memcpy(buf, settings, settings_len);
3135 // Do we need this for subtitles?
3136 // pkt->flags = AV_PKT_FLAG_KEY;
3138 pkt->stream_index = st->index;
3139 pkt->pts = timecode;
3141 // Do we need this for subtitles?
3142 // pkt->dts = timecode;
3144 pkt->duration = duration;
3147 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3148 matroska->prev_pkt = pkt;
3153 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3154 MatroskaTrack *track, AVStream *st,
3155 uint8_t *data, int pkt_size,
3156 uint64_t timecode, uint64_t lace_duration,
3157 int64_t pos, int is_keyframe,
3158 uint8_t *additional, uint64_t additional_id, int additional_size,
3159 int64_t discard_padding)
3161 MatroskaTrackEncoding *encodings = track->encodings.elem;
3162 uint8_t *pkt_data = data;
3163 int offset = 0, res;
3166 if (encodings && !encodings->type && encodings->scope & 1) {
3167 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3172 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3174 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3176 av_log(matroska->ctx, AV_LOG_ERROR,
3177 "Error parsing a wavpack block.\n");
3180 if (pkt_data != data)
3181 av_freep(&pkt_data);
3185 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3186 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3189 pkt = av_mallocz(sizeof(AVPacket));
3191 if (pkt_data != data)
3192 av_freep(&pkt_data);
3193 return AVERROR(ENOMEM);
3195 /* XXX: prevent data copy... */
3196 if (av_new_packet(pkt, pkt_size + offset) < 0) {
3198 res = AVERROR(ENOMEM);
3202 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3203 uint8_t *buf = pkt->data;
3204 bytestream_put_be32(&buf, pkt_size);
3205 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3208 memcpy(pkt->data + offset, pkt_data, pkt_size);
3210 if (pkt_data != data)
3211 av_freep(&pkt_data);
3213 pkt->flags = is_keyframe;
3214 pkt->stream_index = st->index;
3216 if (additional_size > 0) {
3217 uint8_t *side_data = av_packet_new_side_data(pkt,
3218 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3219 additional_size + 8);
3221 av_packet_unref(pkt);
3223 return AVERROR(ENOMEM);
3225 AV_WB64(side_data, additional_id);
3226 memcpy(side_data + 8, additional, additional_size);
3229 if (discard_padding) {
3230 uint8_t *side_data = av_packet_new_side_data(pkt,
3231 AV_PKT_DATA_SKIP_SAMPLES,
3234 av_packet_unref(pkt);
3236 return AVERROR(ENOMEM);
3238 discard_padding = av_rescale_q(discard_padding,
3239 (AVRational){1, 1000000000},
3240 (AVRational){1, st->codecpar->sample_rate});
3241 if (discard_padding > 0) {
3242 AV_WL32(side_data + 4, discard_padding);
3244 AV_WL32(side_data, -discard_padding);
3248 if (track->ms_compat)
3249 pkt->dts = timecode;
3251 pkt->pts = timecode;
3253 pkt->duration = lace_duration;
3255 #if FF_API_CONVERGENCE_DURATION
3256 FF_DISABLE_DEPRECATION_WARNINGS
3257 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3258 pkt->convergence_duration = lace_duration;
3260 FF_ENABLE_DEPRECATION_WARNINGS
3263 dynarray_add(&matroska->packets, &matroska->num_packets, pkt);
3264 matroska->prev_pkt = pkt;
3269 if (pkt_data != data)
3270 av_freep(&pkt_data);
3274 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3275 int size, int64_t pos, uint64_t cluster_time,
3276 uint64_t block_duration, int is_keyframe,
3277 uint8_t *additional, uint64_t additional_id, int additional_size,
3278 int64_t cluster_pos, int64_t discard_padding)
3280 uint64_t timecode = AV_NOPTS_VALUE;
3281 MatroskaTrack *track;
3285 uint32_t *lace_size = NULL;
3286 int n, flags, laces = 0;
3288 int trust_default_duration = 1;
3290 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3291 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3297 track = matroska_find_track_by_num(matroska, num);
3298 if (!track || !track->stream) {
3299 av_log(matroska->ctx, AV_LOG_INFO,
3300 "Invalid stream %"PRIu64" or size %u\n", num, size);
3301 return AVERROR_INVALIDDATA;
3302 } else if (size <= 3)
3305 if (st->discard >= AVDISCARD_ALL)
3307 av_assert1(block_duration != AV_NOPTS_VALUE);
3309 block_time = sign_extend(AV_RB16(data), 16);
3313 if (is_keyframe == -1)
3314 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3316 if (cluster_time != (uint64_t) -1 &&
3317 (block_time >= 0 || cluster_time >= -block_time)) {
3318 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3319 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3320 timecode < track->end_timecode)
3321 is_keyframe = 0; /* overlapping subtitles are not key frame */
3323 ff_reduce_index(matroska->ctx, st->index);
3324 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3329 if (matroska->skip_to_keyframe &&
3330 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3331 // Compare signed timecodes. Timecode may be negative due to codec delay
3332 // offset. We don't support timestamps greater than int64_t anyway - see
3334 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3337 matroska->skip_to_keyframe = 0;
3338 else if (!st->skip_to_keyframe) {
3339 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3340 matroska->skip_to_keyframe = 0;
3344 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3345 &lace_size, &laces);
3350 if (track->audio.samplerate == 8000) {
3351 // If this is needed for more codecs, then add them here
3352 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3353 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3354 trust_default_duration = 0;
3358 if (!block_duration && trust_default_duration)
3359 block_duration = track->default_duration * laces / matroska->time_scale;
3361 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3362 track->end_timecode =
3363 FFMAX(track->end_timecode, timecode + block_duration);
3365 for (n = 0; n < laces; n++) {
3366 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3368 if (lace_size[n] > size) {
3369 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3373 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3374 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3375 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3376 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3377 st->codecpar->block_align && track->audio.sub_packet_size) {
3378 res = matroska_parse_rm_audio(matroska, track, st, data,
3384 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3385 res = matroska_parse_webvtt(matroska, track, st,
3387 timecode, lace_duration,
3392 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3393 timecode, lace_duration, pos,
3394 !n ? is_keyframe : 0,
3395 additional, additional_id, additional_size,
3401 if (timecode != AV_NOPTS_VALUE)
3402 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3403 data += lace_size[n];
3404 size -= lace_size[n];
3412 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3414 EbmlList *blocks_list;
3415 MatroskaBlock *blocks;
3417 res = ebml_parse(matroska,
3418 matroska_cluster_incremental_parsing,
3419 &matroska->current_cluster);
3422 if (matroska->current_cluster_pos)
3423 ebml_level_end(matroska);
3424 ebml_free(matroska_cluster, &matroska->current_cluster);
3425 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3426 matroska->current_cluster_num_blocks = 0;
3427 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3428 matroska->prev_pkt = NULL;
3429 /* sizeof the ID which was already read */
3430 if (matroska->current_id)
3431 matroska->current_cluster_pos -= 4;
3432 res = ebml_parse(matroska,
3433 matroska_clusters_incremental,
3434 &matroska->current_cluster);
3435 /* Try parsing the block again. */
3437 res = ebml_parse(matroska,
3438 matroska_cluster_incremental_parsing,
3439 &matroska->current_cluster);
3443 matroska->current_cluster_num_blocks <
3444 matroska->current_cluster.blocks.nb_elem) {
3445 blocks_list = &matroska->current_cluster.blocks;
3446 blocks = blocks_list->elem;
3448 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3449 i = blocks_list->nb_elem - 1;
3450 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3451 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3452 uint8_t* additional = blocks[i].additional.size > 0 ?
3453 blocks[i].additional.data : NULL;
3454 if (!blocks[i].non_simple)
3455 blocks[i].duration = 0;
3456 res = matroska_parse_block(matroska, blocks[i].bin.data,
3457 blocks[i].bin.size, blocks[i].bin.pos,
3458 matroska->current_cluster.timecode,
3459 blocks[i].duration, is_keyframe,
3460 additional, blocks[i].additional_id,
3461 blocks[i].additional.size,
3462 matroska->current_cluster_pos,
3463 blocks[i].discard_padding);
3470 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3472 MatroskaCluster cluster = { 0 };
3473 EbmlList *blocks_list;
3474 MatroskaBlock *blocks;
3478 if (!matroska->contains_ssa)
3479 return matroska_parse_cluster_incremental(matroska);
3480 pos = avio_tell(matroska->ctx->pb);
3481 matroska->prev_pkt = NULL;
3482 if (matroska->current_id)
3483 pos -= 4; /* sizeof the ID which was already read */
3484 res = ebml_parse(matroska, matroska_clusters, &cluster);
3485 blocks_list = &cluster.blocks;
3486 blocks = blocks_list->elem;
3487 for (i = 0; i < blocks_list->nb_elem; i++)
3488 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3489 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3490 res = matroska_parse_block(matroska, blocks[i].bin.data,
3491 blocks[i].bin.size, blocks[i].bin.pos,
3492 cluster.timecode, blocks[i].duration,
3493 is_keyframe, NULL, 0, 0, pos,
3494 blocks[i].discard_padding);
3496 ebml_free(matroska_cluster, &cluster);
3500 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3502 MatroskaDemuxContext *matroska = s->priv_data;
3505 while (matroska_deliver_packet(matroska, pkt)) {
3506 int64_t pos = avio_tell(matroska->ctx->pb);
3508 return (ret < 0) ? ret : AVERROR_EOF;
3509 if (matroska_parse_cluster(matroska) < 0)
3510 ret = matroska_resync(matroska, pos);
3516 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3517 int64_t timestamp, int flags)
3519 MatroskaDemuxContext *matroska = s->priv_data;
3520 MatroskaTrack *tracks = NULL;
3521 AVStream *st = s->streams[stream_index];
3522 int i, index, index_min;
3524 /* Parse the CUES now since we need the index data to seek. */
3525 if (matroska->cues_parsing_deferred > 0) {
3526 matroska->cues_parsing_deferred = 0;
3527 matroska_parse_cues(matroska);
3530 if (!st->nb_index_entries)
3532 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3534 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3535 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3537 matroska->current_id = 0;
3538 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3539 matroska_clear_queue(matroska);
3540 if (matroska_parse_cluster(matroska) < 0)
3545 matroska_clear_queue(matroska);
3546 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3550 tracks = matroska->tracks.elem;
3551 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3552 tracks[i].audio.pkt_cnt = 0;
3553 tracks[i].audio.sub_packet_cnt = 0;
3554 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3555 tracks[i].end_timecode = 0;
3558 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3559 matroska->current_id = 0;
3560 if (flags & AVSEEK_FLAG_ANY) {
3561 st->skip_to_keyframe = 0;
3562 matroska->skip_to_timecode = timestamp;
3564 st->skip_to_keyframe = 1;
3565 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3567 matroska->skip_to_keyframe = 1;
3569 matroska->num_levels = 0;
3570 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3573 // slightly hackish but allows proper fallback to
3574 // the generic seeking code.
3575 matroska_clear_queue(matroska);
3576 matroska->current_id = 0;
3577 st->skip_to_keyframe =
3578 matroska->skip_to_keyframe = 0;
3580 matroska->num_levels = 0;
3584 static int matroska_read_close(AVFormatContext *s)
3586 MatroskaDemuxContext *matroska = s->priv_data;
3587 MatroskaTrack *tracks = matroska->tracks.elem;
3590 matroska_clear_queue(matroska);
3592 for (n = 0; n < matroska->tracks.nb_elem; n++)
3593 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3594 av_freep(&tracks[n].audio.buf);
3595 ebml_free(matroska_cluster, &matroska->current_cluster);
3596 ebml_free(matroska_segment, matroska);
3602 int64_t start_time_ns;
3603 int64_t end_time_ns;
3604 int64_t start_offset;
3608 /* This function searches all the Cues and returns the CueDesc corresponding to
3609 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3610 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3612 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3613 MatroskaDemuxContext *matroska = s->priv_data;
3616 int nb_index_entries = s->streams[0]->nb_index_entries;
3617 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3618 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3619 for (i = 1; i < nb_index_entries; i++) {
3620 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3621 index_entries[i].timestamp * matroska->time_scale > ts) {
3626 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3627 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3628 if (i != nb_index_entries - 1) {
3629 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3630 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3632 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3633 // FIXME: this needs special handling for files where Cues appear
3634 // before Clusters. the current logic assumes Cues appear after
3636 cue_desc.end_offset = cues_start - matroska->segment_start;
3641 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3643 MatroskaDemuxContext *matroska = s->priv_data;
3644 int64_t cluster_pos, before_pos;
3646 if (s->streams[0]->nb_index_entries <= 0) return 0;
3647 // seek to the first cluster using cues.
3648 index = av_index_search_timestamp(s->streams[0], 0, 0);
3649 if (index < 0) return 0;
3650 cluster_pos = s->streams[0]->index_entries[index].pos;
3651 before_pos = avio_tell(s->pb);
3653 int64_t cluster_id = 0, cluster_length = 0;
3655 avio_seek(s->pb, cluster_pos, SEEK_SET);
3656 // read cluster id and length
3657 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3658 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3659 if (cluster_id != 0xF43B675) { // done with all clusters
3662 avio_seek(s->pb, cluster_pos, SEEK_SET);
3663 matroska->current_id = 0;
3664 matroska_clear_queue(matroska);
3665 if (matroska_parse_cluster(matroska) < 0 ||
3666 matroska->num_packets <= 0) {
3669 pkt = matroska->packets[0];
3670 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3671 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3676 avio_seek(s->pb, before_pos, SEEK_SET);
3680 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3681 double min_buffer, double* buffer,
3682 double* sec_to_download, AVFormatContext *s,
3685 double nano_seconds_per_second = 1000000000.0;
3686 double time_sec = time_ns / nano_seconds_per_second;
3688 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3689 int64_t end_time_ns = time_ns + time_to_search_ns;
3690 double sec_downloaded = 0.0;
3691 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3692 if (desc_curr.start_time_ns == -1)
3694 *sec_to_download = 0.0;
3696 // Check for non cue start time.
3697 if (time_ns > desc_curr.start_time_ns) {
3698 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3699 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3700 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3701 double timeToDownload = (cueBytes * 8.0) / bps;
3703 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3704 *sec_to_download += timeToDownload;
3706 // Check if the search ends within the first cue.
3707 if (desc_curr.end_time_ns >= end_time_ns) {
3708 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3709 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3710 sec_downloaded = percent_to_sub * sec_downloaded;
3711 *sec_to_download = percent_to_sub * *sec_to_download;
3714 if ((sec_downloaded + *buffer) <= min_buffer) {
3718 // Get the next Cue.
3719 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3722 while (desc_curr.start_time_ns != -1) {
3723 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3724 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3725 double desc_sec = desc_ns / nano_seconds_per_second;
3726 double bits = (desc_bytes * 8.0);
3727 double time_to_download = bits / bps;
3729 sec_downloaded += desc_sec - time_to_download;
3730 *sec_to_download += time_to_download;
3732 if (desc_curr.end_time_ns >= end_time_ns) {
3733 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3734 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3735 sec_downloaded = percent_to_sub * sec_downloaded;
3736 *sec_to_download = percent_to_sub * *sec_to_download;
3738 if ((sec_downloaded + *buffer) <= min_buffer)
3743 if ((sec_downloaded + *buffer) <= min_buffer) {
3748 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3750 *buffer = *buffer + sec_downloaded;
3754 /* This function computes the bandwidth of the WebM file with the help of
3755 * buffer_size_after_time_downloaded() function. Both of these functions are
3756 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3757 * Matroska parsing mechanism.
3759 * Returns the bandwidth of the file on success; -1 on error.
3761 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3763 MatroskaDemuxContext *matroska = s->priv_data;
3764 AVStream *st = s->streams[0];
3765 double bandwidth = 0.0;
3768 for (i = 0; i < st->nb_index_entries; i++) {
3769 int64_t prebuffer_ns = 1000000000;
3770 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3771 double nano_seconds_per_second = 1000000000.0;
3772 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3773 double prebuffer_bytes = 0.0;
3774 int64_t temp_prebuffer_ns = prebuffer_ns;
3775 int64_t pre_bytes, pre_ns;
3776 double pre_sec, prebuffer, bits_per_second;
3777 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3779 // Start with the first Cue.
3780 CueDesc desc_end = desc_beg;
3782 // Figure out how much data we have downloaded for the prebuffer. This will
3783 // be used later to adjust the bits per sample to try.
3784 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3785 // Prebuffered the entire Cue.
3786 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3787 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3788 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3790 if (desc_end.start_time_ns == -1) {
3791 // The prebuffer is larger than the duration.
3792 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3794 bits_per_second = 0.0;
3796 // The prebuffer ends in the last Cue. Estimate how much data was
3798 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3799 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3800 pre_sec = pre_ns / nano_seconds_per_second;
3802 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3804 prebuffer = prebuffer_ns / nano_seconds_per_second;
3806 // Set this to 0.0 in case our prebuffer buffers the entire video.
3807 bits_per_second = 0.0;
3809 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3810 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3811 double desc_sec = desc_ns / nano_seconds_per_second;
3812 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3814 // Drop the bps by the percentage of bytes buffered.
3815 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3816 double mod_bits_per_second = calc_bits_per_second * percent;
3818 if (prebuffer < desc_sec) {
3820 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3822 // Add 1 so the bits per second should be a little bit greater than file
3824 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3825 const double min_buffer = 0.0;
3826 double buffer = prebuffer;
3827 double sec_to_download = 0.0;
3829 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3830 min_buffer, &buffer, &sec_to_download,
3834 } else if (rv == 0) {
3835 bits_per_second = (double)(bps);
3840 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3841 } while (desc_end.start_time_ns != -1);
3843 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3845 return (int64_t)bandwidth;
3848 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3850 MatroskaDemuxContext *matroska = s->priv_data;
3851 EbmlList *seekhead_list = &matroska->seekhead;
3852 MatroskaSeekhead *seekhead = seekhead_list->elem;
3854 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3858 // determine cues start and end positions
3859 for (i = 0; i < seekhead_list->nb_elem; i++)
3860 if (seekhead[i].id == MATROSKA_ID_CUES)
3863 if (i >= seekhead_list->nb_elem) return -1;
3865 before_pos = avio_tell(matroska->ctx->pb);
3866 cues_start = seekhead[i].pos + matroska->segment_start;
3867 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3868 // cues_end is computed as cues_start + cues_length + length of the
3869 // Cues element ID + EBML length of the Cues element. cues_end is
3870 // inclusive and the above sum is reduced by 1.
3871 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3872 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3873 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3874 cues_end = cues_start + cues_length + bytes_read - 1;
3876 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3877 if (cues_start == -1 || cues_end == -1) return -1;
3880 matroska_parse_cues(matroska);
3883 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3886 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3888 // if the file has cues at the start, fix up the init range so tht
3889 // it does not include it
3890 if (cues_start <= init_range)
3891 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3894 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3895 if (bandwidth < 0) return -1;
3896 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3898 // check if all clusters start with key frames
3899 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3901 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3902 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3903 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3904 if (!buf) return -1;
3906 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3907 int ret = snprintf(buf + end, 20 * sizeof(char),
3908 "%" PRId64, s->streams[0]->index_entries[i].timestamp);
3909 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3910 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3912 return AVERROR_INVALIDDATA;
3915 if (i != s->streams[0]->nb_index_entries - 1) {
3916 strncat(buf, ",", sizeof(char));
3920 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3926 static int webm_dash_manifest_read_header(AVFormatContext *s)
3929 int ret = matroska_read_header(s);
3931 MatroskaTrack *tracks;
3932 MatroskaDemuxContext *matroska = s->priv_data;
3934 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3937 if (!s->nb_streams) {
3938 matroska_read_close(s);
3939 av_log(s, AV_LOG_ERROR, "No streams found\n");
3940 return AVERROR_INVALIDDATA;
3943 if (!matroska->is_live) {
3944 buf = av_asprintf("%g", matroska->duration);
3945 if (!buf) return AVERROR(ENOMEM);
3946 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3949 // initialization range
3950 // 5 is the offset of Cluster ID.
3951 init_range = avio_tell(s->pb) - 5;
3952 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3955 // basename of the file
3956 buf = strrchr(s->url, '/');
3957 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
3960 tracks = matroska->tracks.elem;
3961 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3963 // parse the cues and populate Cue related fields
3964 if (!matroska->is_live) {
3965 ret = webm_dash_manifest_cues(s, init_range);
3967 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
3972 // use the bandwidth from the command line if it was provided
3973 if (matroska->bandwidth > 0) {
3974 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
3975 matroska->bandwidth, 0);
3980 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3985 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3986 static const AVOption options[] = {
3987 { "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 },
3988 { "bandwidth", "bandwidth of this stream to be specified in the DASH manifest.", OFFSET(bandwidth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
3992 static const AVClass webm_dash_class = {
3993 .class_name = "WebM DASH Manifest demuxer",
3994 .item_name = av_default_item_name,
3996 .version = LIBAVUTIL_VERSION_INT,
3999 AVInputFormat ff_matroska_demuxer = {
4000 .name = "matroska,webm",
4001 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4002 .extensions = "mkv,mk3d,mka,mks",
4003 .priv_data_size = sizeof(MatroskaDemuxContext),
4004 .read_probe = matroska_probe,
4005 .read_header = matroska_read_header,
4006 .read_packet = matroska_read_packet,
4007 .read_close = matroska_read_close,
4008 .read_seek = matroska_read_seek,
4009 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4012 AVInputFormat ff_webm_dash_manifest_demuxer = {
4013 .name = "webm_dash_manifest",
4014 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4015 .priv_data_size = sizeof(MatroskaDemuxContext),
4016 .read_header = webm_dash_manifest_read_header,
4017 .read_packet = webm_dash_manifest_read_packet,
4018 .read_close = matroska_read_close,
4019 .priv_class = &webm_dash_class,