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 */
342 AVPacketList *queue_end;
346 /* What to skip before effectively reading a packet. */
347 int skip_to_keyframe;
348 uint64_t skip_to_timecode;
350 /* File has a CUES element, but we defer parsing until it is needed. */
351 int cues_parsing_deferred;
353 /* Level1 elements and whether they were read yet */
354 MatroskaLevel1Element level1_elems[64];
355 int num_level1_elems;
357 int current_cluster_num_blocks;
358 int64_t current_cluster_pos;
359 MatroskaCluster current_cluster;
361 /* File has SSA subtitles which prevent incremental cluster parsing. */
364 /* WebM DASH Manifest live flag */
367 /* Bandwidth value for WebM DASH Manifest */
369 } MatroskaDemuxContext;
371 typedef struct MatroskaBlock {
376 uint64_t additional_id;
378 int64_t discard_padding;
381 static const EbmlSyntax ebml_header[] = {
382 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
383 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
384 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
385 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
386 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
387 { EBML_ID_EBMLVERSION, EBML_NONE },
388 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
392 static const EbmlSyntax ebml_syntax[] = {
393 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
397 static const EbmlSyntax matroska_info[] = {
398 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
399 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
400 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
401 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
402 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
403 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
404 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
408 static const EbmlSyntax matroska_mastering_meta[] = {
409 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
422 static const EbmlSyntax matroska_track_video_color[] = {
423 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
424 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
431 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
436 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
440 static const EbmlSyntax matroska_track_video_projection[] = {
441 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
442 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
445 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
449 static const EbmlSyntax matroska_track_video[] = {
450 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
451 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
452 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
453 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
454 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
455 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
456 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
457 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
458 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
459 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
462 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
463 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
464 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
466 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
467 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
471 static const EbmlSyntax matroska_track_audio[] = {
472 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
473 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
474 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
475 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
479 static const EbmlSyntax matroska_track_encoding_compression[] = {
480 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
481 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
485 static const EbmlSyntax matroska_track_encoding_encryption[] = {
486 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
487 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
488 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
495 static const EbmlSyntax matroska_track_encoding[] = {
496 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
497 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
498 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
499 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
500 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
504 static const EbmlSyntax matroska_track_encodings[] = {
505 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
509 static const EbmlSyntax matroska_track_plane[] = {
510 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
511 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
515 static const EbmlSyntax matroska_track_combine_planes[] = {
516 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
520 static const EbmlSyntax matroska_track_operation[] = {
521 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
525 static const EbmlSyntax matroska_track[] = {
526 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
527 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
528 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
529 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
530 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
531 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
532 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
533 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
534 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
535 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
536 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
537 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
538 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
539 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
540 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
541 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
542 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
543 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
544 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
545 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
546 { MATROSKA_ID_CODECNAME, EBML_NONE },
547 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
548 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
549 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
550 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
551 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
555 static const EbmlSyntax matroska_tracks[] = {
556 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
560 static const EbmlSyntax matroska_attachment[] = {
561 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
562 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
563 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
564 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
565 { MATROSKA_ID_FILEDESC, EBML_NONE },
569 static const EbmlSyntax matroska_attachments[] = {
570 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
574 static const EbmlSyntax matroska_chapter_display[] = {
575 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
576 { MATROSKA_ID_CHAPLANG, EBML_NONE },
577 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
581 static const EbmlSyntax matroska_chapter_entry[] = {
582 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
584 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
585 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
586 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
587 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
588 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
589 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
593 static const EbmlSyntax matroska_chapter[] = {
594 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
595 { MATROSKA_ID_EDITIONUID, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
598 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
602 static const EbmlSyntax matroska_chapters[] = {
603 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
607 static const EbmlSyntax matroska_index_pos[] = {
608 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
609 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
610 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
611 { MATROSKA_ID_CUEDURATION, EBML_NONE },
612 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
616 static const EbmlSyntax matroska_index_entry[] = {
617 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
618 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
622 static const EbmlSyntax matroska_index[] = {
623 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
627 static const EbmlSyntax matroska_simpletag[] = {
628 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
629 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
630 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
631 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
633 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
637 static const EbmlSyntax matroska_tagtargets[] = {
638 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
639 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
640 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
641 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
642 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
646 static const EbmlSyntax matroska_tag[] = {
647 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
648 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
652 static const EbmlSyntax matroska_tags[] = {
653 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
657 static const EbmlSyntax matroska_seekhead_entry[] = {
658 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
659 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
663 static const EbmlSyntax matroska_seekhead[] = {
664 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
668 static const EbmlSyntax matroska_segment[] = {
669 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
670 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
671 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
672 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
673 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
674 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
675 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
676 { MATROSKA_ID_CLUSTER, EBML_STOP },
680 static const EbmlSyntax matroska_segments[] = {
681 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
685 static const EbmlSyntax matroska_blockmore[] = {
686 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
687 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
691 static const EbmlSyntax matroska_blockadditions[] = {
692 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
696 static const EbmlSyntax matroska_blockgroup[] = {
697 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
698 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
699 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
700 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
701 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
702 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
703 { MATROSKA_ID_CODECSTATE, EBML_NONE },
704 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
708 static const EbmlSyntax matroska_cluster[] = {
709 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
710 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
711 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
712 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
713 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
717 static const EbmlSyntax matroska_clusters[] = {
718 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
719 { MATROSKA_ID_INFO, EBML_NONE },
720 { MATROSKA_ID_CUES, EBML_NONE },
721 { MATROSKA_ID_TAGS, EBML_NONE },
722 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
726 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
727 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
728 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
729 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
730 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
731 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
732 { MATROSKA_ID_INFO, EBML_NONE },
733 { MATROSKA_ID_CUES, EBML_NONE },
734 { MATROSKA_ID_TAGS, EBML_NONE },
735 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
736 { MATROSKA_ID_CLUSTER, EBML_STOP },
740 static const EbmlSyntax matroska_cluster_incremental[] = {
741 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
742 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
743 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
744 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
745 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
749 static const EbmlSyntax matroska_clusters_incremental[] = {
750 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
751 { MATROSKA_ID_INFO, EBML_NONE },
752 { MATROSKA_ID_CUES, EBML_NONE },
753 { MATROSKA_ID_TAGS, EBML_NONE },
754 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
758 static const char *const matroska_doctypes[] = { "matroska", "webm" };
760 static int matroska_read_close(AVFormatContext *s);
762 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
764 AVIOContext *pb = matroska->ctx->pb;
767 matroska->current_id = 0;
768 matroska->num_levels = 0;
770 /* seek to next position to resync from */
771 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
778 // try to find a toplevel element
779 while (!avio_feof(pb)) {
780 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
781 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
782 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
783 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
784 matroska->current_id = id;
787 id = (id << 8) | avio_r8(pb);
795 * Return: Whether we reached the end of a level in the hierarchy or not.
797 static int ebml_level_end(MatroskaDemuxContext *matroska)
799 AVIOContext *pb = matroska->ctx->pb;
800 int64_t pos = avio_tell(pb);
802 if (matroska->num_levels > 0) {
803 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
804 if (pos - level->start >= level->length || matroska->current_id) {
805 matroska->num_levels--;
809 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
813 * Read: an "EBML number", which is defined as a variable-length
814 * array of bytes. The first byte indicates the length by giving a
815 * number of 0-bits followed by a one. The position of the first
816 * "one" bit inside the first byte indicates the length of this
818 * Returns: number of bytes read, < 0 on error
820 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
821 int max_size, uint64_t *number)
826 /* The first byte tells us the length in bytes - avio_r8() can normally
827 * return 0, but since that's not a valid first ebmlID byte, we can
828 * use it safely here to catch EOS. */
829 if (!(total = avio_r8(pb))) {
830 /* we might encounter EOS here */
831 if (!avio_feof(pb)) {
832 int64_t pos = avio_tell(pb);
833 av_log(matroska->ctx, AV_LOG_ERROR,
834 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
836 return pb->error ? pb->error : AVERROR(EIO);
841 /* get the length of the EBML number */
842 read = 8 - ff_log2_tab[total];
843 if (read > max_size) {
844 int64_t pos = avio_tell(pb) - 1;
845 av_log(matroska->ctx, AV_LOG_ERROR,
846 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
847 (uint8_t) total, pos, pos);
848 return AVERROR_INVALIDDATA;
851 /* read out length */
852 total ^= 1 << ff_log2_tab[total];
854 total = (total << 8) | avio_r8(pb);
862 * Read a EBML length value.
863 * This needs special handling for the "unknown length" case which has multiple
866 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
869 int res = ebml_read_num(matroska, pb, 8, number);
870 if (res > 0 && *number + 1 == 1ULL << (7 * res))
871 *number = 0xffffffffffffffULL;
876 * Read the next element as an unsigned int.
877 * 0 is success, < 0 is failure.
879 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
884 return AVERROR_INVALIDDATA;
886 /* big-endian ordering; build up number */
889 *num = (*num << 8) | avio_r8(pb);
895 * Read the next element as a signed int.
896 * 0 is success, < 0 is failure.
898 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
903 return AVERROR_INVALIDDATA;
908 *num = sign_extend(avio_r8(pb), 8);
910 /* big-endian ordering; build up number */
912 *num = ((uint64_t)*num << 8) | avio_r8(pb);
919 * Read the next element as a float.
920 * 0 is success, < 0 is failure.
922 static int ebml_read_float(AVIOContext *pb, int size, double *num)
927 *num = av_int2float(avio_rb32(pb));
929 *num = av_int2double(avio_rb64(pb));
931 return AVERROR_INVALIDDATA;
937 * Read the next element as an ASCII string.
938 * 0 is success, < 0 is failure.
940 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
944 /* EBML strings are usually not 0-terminated, so we allocate one
945 * byte more, read the string and NULL-terminate it ourselves. */
946 if (!(res = av_malloc(size + 1)))
947 return AVERROR(ENOMEM);
948 if (avio_read(pb, (uint8_t *) res, size) != size) {
960 * Read the next element as binary data.
961 * 0 is success, < 0 is failure.
963 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
965 av_fast_padded_malloc(&bin->data, &bin->size, length);
967 return AVERROR(ENOMEM);
970 bin->pos = avio_tell(pb);
971 if (avio_read(pb, bin->data, length) != length) {
972 av_freep(&bin->data);
981 * Read the next element, but only the header. The contents
982 * are supposed to be sub-elements which can be read separately.
983 * 0 is success, < 0 is failure.
985 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
987 AVIOContext *pb = matroska->ctx->pb;
988 MatroskaLevel *level;
990 if (matroska->num_levels >= EBML_MAX_DEPTH) {
991 av_log(matroska->ctx, AV_LOG_ERROR,
992 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
993 return AVERROR(ENOSYS);
996 level = &matroska->levels[matroska->num_levels++];
997 level->start = avio_tell(pb);
998 level->length = length;
1004 * Read signed/unsigned "EBML" numbers.
1005 * Return: number of bytes processed, < 0 on error
1007 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1008 uint8_t *data, uint32_t size, uint64_t *num)
1011 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1012 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1016 * Same as above, but signed.
1018 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1019 uint8_t *data, uint32_t size, int64_t *num)
1024 /* read as unsigned number first */
1025 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1028 /* make signed (weird way) */
1029 *num = unum - ((1LL << (7 * res - 1)) - 1);
1034 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1035 EbmlSyntax *syntax, void *data);
1037 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1038 uint32_t id, void *data)
1041 for (i = 0; syntax[i].id; i++)
1042 if (id == syntax[i].id)
1044 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1045 matroska->num_levels > 0 &&
1046 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1047 return 0; // we reached the end of an unknown size cluster
1048 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1049 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1051 return ebml_parse_elem(matroska, &syntax[i], data);
1054 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1057 if (!matroska->current_id) {
1059 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1061 // in live mode, finish parsing if EOF is reached.
1062 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1063 res == AVERROR_EOF) ? 1 : res;
1065 matroska->current_id = id | 1 << 7 * res;
1067 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1070 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1075 for (i = 0; syntax[i].id; i++)
1076 switch (syntax[i].type) {
1078 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1081 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1084 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1088 // the default may be NULL
1089 if (syntax[i].def.s) {
1090 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1091 *dst = av_strdup(syntax[i].def.s);
1093 return AVERROR(ENOMEM);
1098 while (!res && !ebml_level_end(matroska))
1099 res = ebml_parse(matroska, syntax, data);
1104 static int is_ebml_id_valid(uint32_t id)
1106 // Due to endian nonsense in Matroska, the highest byte with any bits set
1107 // will contain the leading length bit. This bit in turn identifies the
1108 // total byte length of the element by its position within the byte.
1109 unsigned int bits = av_log2(id);
1110 return id && (bits + 7) / 8 == (8 - bits % 8);
1114 * Allocate and return the entry for the level1 element with the given ID. If
1115 * an entry already exists, return the existing entry.
1117 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1121 MatroskaLevel1Element *elem;
1123 if (!is_ebml_id_valid(id))
1126 // Some files link to all clusters; useless.
1127 if (id == MATROSKA_ID_CLUSTER)
1130 // There can be multiple seekheads.
1131 if (id != MATROSKA_ID_SEEKHEAD) {
1132 for (i = 0; i < matroska->num_level1_elems; i++) {
1133 if (matroska->level1_elems[i].id == id)
1134 return &matroska->level1_elems[i];
1138 // Only a completely broken file would have more elements.
1139 // It also provides a low-effort way to escape from circular seekheads
1140 // (every iteration will add a level1 entry).
1141 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1142 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1146 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1147 *elem = (MatroskaLevel1Element){.id = id};
1152 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1153 EbmlSyntax *syntax, void *data)
1155 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1158 // max. 16 MB for strings
1159 [EBML_STR] = 0x1000000,
1160 [EBML_UTF8] = 0x1000000,
1161 // max. 256 MB for binary data
1162 [EBML_BIN] = 0x10000000,
1163 // no limits for anything else
1165 AVIOContext *pb = matroska->ctx->pb;
1166 uint32_t id = syntax->id;
1170 MatroskaLevel1Element *level1_elem;
1172 data = (char *) data + syntax->data_offset;
1173 if (syntax->list_elem_size) {
1174 EbmlList *list = data;
1175 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1177 return AVERROR(ENOMEM);
1178 list->elem = newelem;
1179 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1180 memset(data, 0, syntax->list_elem_size);
1184 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1185 matroska->current_id = 0;
1186 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1188 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1189 av_log(matroska->ctx, AV_LOG_ERROR,
1190 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1191 length, max_lengths[syntax->type], syntax->type);
1192 return AVERROR_INVALIDDATA;
1196 switch (syntax->type) {
1198 res = ebml_read_uint(pb, length, data);
1201 res = ebml_read_sint(pb, length, data);
1204 res = ebml_read_float(pb, length, data);
1208 res = ebml_read_ascii(pb, length, data);
1211 res = ebml_read_binary(pb, length, data);
1215 if ((res = ebml_read_master(matroska, length)) < 0)
1217 if (id == MATROSKA_ID_SEGMENT)
1218 matroska->segment_start = avio_tell(matroska->ctx->pb);
1219 if (id == MATROSKA_ID_CUES)
1220 matroska->cues_parsing_deferred = 0;
1221 if (syntax->type == EBML_LEVEL1 &&
1222 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1223 if (level1_elem->parsed)
1224 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1225 level1_elem->parsed = 1;
1227 return ebml_parse_nest(matroska, syntax->def.n, data);
1229 return ebml_parse_id(matroska, syntax->def.n, id, data);
1233 if (ffio_limit(pb, length) != length)
1234 return AVERROR(EIO);
1235 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1237 if (res == AVERROR_INVALIDDATA)
1238 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1239 else if (res == AVERROR(EIO))
1240 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1244 static void ebml_free(EbmlSyntax *syntax, void *data)
1247 for (i = 0; syntax[i].id; i++) {
1248 void *data_off = (char *) data + syntax[i].data_offset;
1249 switch (syntax[i].type) {
1255 av_freep(&((EbmlBin *) data_off)->data);
1259 if (syntax[i].list_elem_size) {
1260 EbmlList *list = data_off;
1261 char *ptr = list->elem;
1262 for (j = 0; j < list->nb_elem;
1263 j++, ptr += syntax[i].list_elem_size)
1264 ebml_free(syntax[i].def.n, ptr);
1265 av_freep(&list->elem);
1268 ebml_free(syntax[i].def.n, data_off);
1278 static int matroska_probe(AVProbeData *p)
1281 int len_mask = 0x80, size = 1, n = 1, i;
1284 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1287 /* length of header */
1289 while (size <= 8 && !(total & len_mask)) {
1295 total &= (len_mask - 1);
1297 total = (total << 8) | p->buf[4 + n++];
1299 /* Does the probe data contain the whole header? */
1300 if (p->buf_size < 4 + size + total)
1303 /* The header should contain a known document type. For now,
1304 * we don't parse the whole header but simply check for the
1305 * availability of that array of characters inside the header.
1306 * Not fully fool-proof, but good enough. */
1307 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1308 size_t probelen = strlen(matroska_doctypes[i]);
1309 if (total < probelen)
1311 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1312 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1313 return AVPROBE_SCORE_MAX;
1316 // probably valid EBML header but no recognized doctype
1317 return AVPROBE_SCORE_EXTENSION;
1320 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1323 MatroskaTrack *tracks = matroska->tracks.elem;
1326 for (i = 0; i < matroska->tracks.nb_elem; i++)
1327 if (tracks[i].num == num)
1330 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1334 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1335 MatroskaTrack *track)
1337 MatroskaTrackEncoding *encodings = track->encodings.elem;
1338 uint8_t *data = *buf;
1339 int isize = *buf_size;
1340 uint8_t *pkt_data = NULL;
1341 uint8_t av_unused *newpktdata;
1342 int pkt_size = isize;
1346 if (pkt_size >= 10000000U)
1347 return AVERROR_INVALIDDATA;
1349 switch (encodings[0].compression.algo) {
1350 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1352 int header_size = encodings[0].compression.settings.size;
1353 uint8_t *header = encodings[0].compression.settings.data;
1355 if (header_size && !header) {
1356 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1363 pkt_size = isize + header_size;
1364 pkt_data = av_malloc(pkt_size);
1366 return AVERROR(ENOMEM);
1368 memcpy(pkt_data, header, header_size);
1369 memcpy(pkt_data + header_size, data, isize);
1373 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1375 olen = pkt_size *= 3;
1376 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING);
1378 result = AVERROR(ENOMEM);
1381 pkt_data = newpktdata;
1382 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1383 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1385 result = AVERROR_INVALIDDATA;
1392 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1394 z_stream zstream = { 0 };
1395 if (inflateInit(&zstream) != Z_OK)
1397 zstream.next_in = data;
1398 zstream.avail_in = isize;
1401 newpktdata = av_realloc(pkt_data, pkt_size);
1403 inflateEnd(&zstream);
1404 result = AVERROR(ENOMEM);
1407 pkt_data = newpktdata;
1408 zstream.avail_out = pkt_size - zstream.total_out;
1409 zstream.next_out = pkt_data + zstream.total_out;
1410 result = inflate(&zstream, Z_NO_FLUSH);
1411 } while (result == Z_OK && pkt_size < 10000000);
1412 pkt_size = zstream.total_out;
1413 inflateEnd(&zstream);
1414 if (result != Z_STREAM_END) {
1415 if (result == Z_MEM_ERROR)
1416 result = AVERROR(ENOMEM);
1418 result = AVERROR_INVALIDDATA;
1425 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1427 bz_stream bzstream = { 0 };
1428 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1430 bzstream.next_in = data;
1431 bzstream.avail_in = isize;
1434 newpktdata = av_realloc(pkt_data, pkt_size);
1436 BZ2_bzDecompressEnd(&bzstream);
1437 result = AVERROR(ENOMEM);
1440 pkt_data = newpktdata;
1441 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1442 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1443 result = BZ2_bzDecompress(&bzstream);
1444 } while (result == BZ_OK && pkt_size < 10000000);
1445 pkt_size = bzstream.total_out_lo32;
1446 BZ2_bzDecompressEnd(&bzstream);
1447 if (result != BZ_STREAM_END) {
1448 if (result == BZ_MEM_ERROR)
1449 result = AVERROR(ENOMEM);
1451 result = AVERROR_INVALIDDATA;
1458 return AVERROR_INVALIDDATA;
1462 *buf_size = pkt_size;
1470 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1471 AVDictionary **metadata, char *prefix)
1473 MatroskaTag *tags = list->elem;
1477 for (i = 0; i < list->nb_elem; i++) {
1478 const char *lang = tags[i].lang &&
1479 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1481 if (!tags[i].name) {
1482 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1486 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1488 av_strlcpy(key, tags[i].name, sizeof(key));
1489 if (tags[i].def || !lang) {
1490 av_dict_set(metadata, key, tags[i].string, 0);
1491 if (tags[i].sub.nb_elem)
1492 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1495 av_strlcat(key, "-", sizeof(key));
1496 av_strlcat(key, lang, sizeof(key));
1497 av_dict_set(metadata, key, tags[i].string, 0);
1498 if (tags[i].sub.nb_elem)
1499 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1502 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1505 static void matroska_convert_tags(AVFormatContext *s)
1507 MatroskaDemuxContext *matroska = s->priv_data;
1508 MatroskaTags *tags = matroska->tags.elem;
1511 for (i = 0; i < matroska->tags.nb_elem; i++) {
1512 if (tags[i].target.attachuid) {
1513 MatroskaAttachment *attachment = matroska->attachments.elem;
1515 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1516 if (attachment[j].uid == tags[i].target.attachuid &&
1517 attachment[j].stream) {
1518 matroska_convert_tag(s, &tags[i].tag,
1519 &attachment[j].stream->metadata, NULL);
1524 av_log(NULL, AV_LOG_WARNING,
1525 "The tags at index %d refer to a "
1526 "non-existent attachment %"PRId64".\n",
1527 i, tags[i].target.attachuid);
1529 } else if (tags[i].target.chapteruid) {
1530 MatroskaChapter *chapter = matroska->chapters.elem;
1532 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1533 if (chapter[j].uid == tags[i].target.chapteruid &&
1534 chapter[j].chapter) {
1535 matroska_convert_tag(s, &tags[i].tag,
1536 &chapter[j].chapter->metadata, NULL);
1541 av_log(NULL, AV_LOG_WARNING,
1542 "The tags at index %d refer to a non-existent chapter "
1544 i, tags[i].target.chapteruid);
1546 } else if (tags[i].target.trackuid) {
1547 MatroskaTrack *track = matroska->tracks.elem;
1549 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1550 if (track[j].uid == tags[i].target.trackuid &&
1552 matroska_convert_tag(s, &tags[i].tag,
1553 &track[j].stream->metadata, NULL);
1558 av_log(NULL, AV_LOG_WARNING,
1559 "The tags at index %d refer to a non-existent track "
1561 i, tags[i].target.trackuid);
1564 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1565 tags[i].target.type);
1570 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1573 uint32_t level_up = matroska->level_up;
1574 uint32_t saved_id = matroska->current_id;
1575 int64_t before_pos = avio_tell(matroska->ctx->pb);
1576 MatroskaLevel level;
1581 offset = pos + matroska->segment_start;
1582 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1583 /* We don't want to lose our seekhead level, so we add
1584 * a dummy. This is a crude hack. */
1585 if (matroska->num_levels == EBML_MAX_DEPTH) {
1586 av_log(matroska->ctx, AV_LOG_INFO,
1587 "Max EBML element depth (%d) reached, "
1588 "cannot parse further.\n", EBML_MAX_DEPTH);
1589 ret = AVERROR_INVALIDDATA;
1592 level.length = (uint64_t) -1;
1593 matroska->levels[matroska->num_levels] = level;
1594 matroska->num_levels++;
1595 matroska->current_id = 0;
1597 ret = ebml_parse(matroska, matroska_segment, matroska);
1599 /* remove dummy level */
1600 while (matroska->num_levels) {
1601 uint64_t length = matroska->levels[--matroska->num_levels].length;
1602 if (length == (uint64_t) -1)
1608 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1609 matroska->level_up = level_up;
1610 matroska->current_id = saved_id;
1615 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1617 EbmlList *seekhead_list = &matroska->seekhead;
1620 // we should not do any seeking in the streaming case
1621 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1624 for (i = 0; i < seekhead_list->nb_elem; i++) {
1625 MatroskaSeekhead *seekheads = seekhead_list->elem;
1626 uint32_t id = seekheads[i].id;
1627 uint64_t pos = seekheads[i].pos;
1629 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1630 if (!elem || elem->parsed)
1635 // defer cues parsing until we actually need cue data.
1636 if (id == MATROSKA_ID_CUES)
1639 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1640 // mark index as broken
1641 matroska->cues_parsing_deferred = -1;
1649 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1651 EbmlList *index_list;
1652 MatroskaIndex *index;
1653 uint64_t index_scale = 1;
1656 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1659 index_list = &matroska->index;
1660 index = index_list->elem;
1661 if (index_list->nb_elem < 2)
1663 if (index[1].time > 1E14 / matroska->time_scale) {
1664 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1667 for (i = 0; i < index_list->nb_elem; i++) {
1668 EbmlList *pos_list = &index[i].pos;
1669 MatroskaIndexPos *pos = pos_list->elem;
1670 for (j = 0; j < pos_list->nb_elem; j++) {
1671 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1673 if (track && track->stream)
1674 av_add_index_entry(track->stream,
1675 pos[j].pos + matroska->segment_start,
1676 index[i].time / index_scale, 0, 0,
1682 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1685 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1688 for (i = 0; i < matroska->num_level1_elems; i++) {
1689 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1690 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1691 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1692 matroska->cues_parsing_deferred = -1;
1698 matroska_add_index_entries(matroska);
1701 static int matroska_aac_profile(char *codec_id)
1703 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1706 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1707 if (strstr(codec_id, aac_profiles[profile]))
1712 static int matroska_aac_sri(int samplerate)
1716 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1717 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1722 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1724 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1725 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1728 static int matroska_parse_flac(AVFormatContext *s,
1729 MatroskaTrack *track,
1732 AVStream *st = track->stream;
1733 uint8_t *p = track->codec_priv.data;
1734 int size = track->codec_priv.size;
1736 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1737 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1738 track->codec_priv.size = 0;
1742 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1744 p += track->codec_priv.size;
1745 size -= track->codec_priv.size;
1747 /* parse the remaining metadata blocks if present */
1749 int block_last, block_type, block_size;
1751 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1755 if (block_size > size)
1758 /* check for the channel mask */
1759 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1760 AVDictionary *dict = NULL;
1761 AVDictionaryEntry *chmask;
1763 ff_vorbis_comment(s, &dict, p, block_size, 0);
1764 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1766 uint64_t mask = strtol(chmask->value, NULL, 0);
1767 if (!mask || mask & ~0x3ffffULL) {
1768 av_log(s, AV_LOG_WARNING,
1769 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1771 st->codecpar->channel_layout = mask;
1773 av_dict_free(&dict);
1783 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1785 int major, minor, micro, bttb = 0;
1787 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1788 * this function, and fixed in 57.52 */
1789 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1790 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1792 switch (field_order) {
1793 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1794 return AV_FIELD_PROGRESSIVE;
1795 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1796 return AV_FIELD_UNKNOWN;
1797 case MATROSKA_VIDEO_FIELDORDER_TT:
1799 case MATROSKA_VIDEO_FIELDORDER_BB:
1801 case MATROSKA_VIDEO_FIELDORDER_BT:
1802 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1803 case MATROSKA_VIDEO_FIELDORDER_TB:
1804 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1806 return AV_FIELD_UNKNOWN;
1810 static void mkv_stereo_mode_display_mul(int stereo_mode,
1811 int *h_width, int *h_height)
1813 switch (stereo_mode) {
1814 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1815 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1816 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1817 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1818 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1820 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1821 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1822 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1823 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1826 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1827 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1828 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1829 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1835 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1836 const MatroskaTrackVideoColor *color = track->video.color.elem;
1837 const MatroskaMasteringMeta *mastering_meta;
1838 int has_mastering_primaries, has_mastering_luminance;
1840 if (!track->video.color.nb_elem)
1843 mastering_meta = &color->mastering_meta;
1844 // Mastering primaries are CIE 1931 coords, and must be > 0.
1845 has_mastering_primaries =
1846 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1847 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1848 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1849 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1850 has_mastering_luminance = mastering_meta->max_luminance > 0;
1852 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1853 st->codecpar->color_space = color->matrix_coefficients;
1854 if (color->primaries != AVCOL_PRI_RESERVED &&
1855 color->primaries != AVCOL_PRI_RESERVED0)
1856 st->codecpar->color_primaries = color->primaries;
1857 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1858 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1859 st->codecpar->color_trc = color->transfer_characteristics;
1860 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1861 color->range <= AVCOL_RANGE_JPEG)
1862 st->codecpar->color_range = color->range;
1863 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1864 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1865 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1866 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1867 st->codecpar->chroma_location =
1868 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1869 (color->chroma_siting_vert - 1) << 7);
1871 if (color->max_cll && color->max_fall) {
1874 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1876 return AVERROR(ENOMEM);
1877 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1878 (uint8_t *)metadata, size);
1880 av_freep(&metadata);
1883 metadata->MaxCLL = color->max_cll;
1884 metadata->MaxFALL = color->max_fall;
1887 if (has_mastering_primaries || has_mastering_luminance) {
1888 // Use similar rationals as other standards.
1889 const int chroma_den = 50000;
1890 const int luma_den = 10000;
1891 AVMasteringDisplayMetadata *metadata =
1892 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1893 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1894 sizeof(AVMasteringDisplayMetadata));
1896 return AVERROR(ENOMEM);
1898 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1899 if (has_mastering_primaries) {
1900 metadata->display_primaries[0][0] = av_make_q(
1901 round(mastering_meta->r_x * chroma_den), chroma_den);
1902 metadata->display_primaries[0][1] = av_make_q(
1903 round(mastering_meta->r_y * chroma_den), chroma_den);
1904 metadata->display_primaries[1][0] = av_make_q(
1905 round(mastering_meta->g_x * chroma_den), chroma_den);
1906 metadata->display_primaries[1][1] = av_make_q(
1907 round(mastering_meta->g_y * chroma_den), chroma_den);
1908 metadata->display_primaries[2][0] = av_make_q(
1909 round(mastering_meta->b_x * chroma_den), chroma_den);
1910 metadata->display_primaries[2][1] = av_make_q(
1911 round(mastering_meta->b_y * chroma_den), chroma_den);
1912 metadata->white_point[0] = av_make_q(
1913 round(mastering_meta->white_x * chroma_den), chroma_den);
1914 metadata->white_point[1] = av_make_q(
1915 round(mastering_meta->white_y * chroma_den), chroma_den);
1916 metadata->has_primaries = 1;
1918 if (has_mastering_luminance) {
1919 metadata->max_luminance = av_make_q(
1920 round(mastering_meta->max_luminance * luma_den), luma_den);
1921 metadata->min_luminance = av_make_q(
1922 round(mastering_meta->min_luminance * luma_den), luma_den);
1923 metadata->has_luminance = 1;
1929 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1930 AVSphericalMapping *spherical;
1931 enum AVSphericalProjection projection;
1932 size_t spherical_size;
1933 uint32_t l = 0, t = 0, r = 0, b = 0;
1934 uint32_t padding = 0;
1938 bytestream2_init(&gb, track->video.projection.private.data,
1939 track->video.projection.private.size);
1941 if (bytestream2_get_byte(&gb) != 0) {
1942 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1946 bytestream2_skip(&gb, 3); // flags
1948 switch (track->video.projection.type) {
1949 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1950 if (track->video.projection.private.size == 20) {
1951 t = bytestream2_get_be32(&gb);
1952 b = bytestream2_get_be32(&gb);
1953 l = bytestream2_get_be32(&gb);
1954 r = bytestream2_get_be32(&gb);
1956 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1957 av_log(NULL, AV_LOG_ERROR,
1958 "Invalid bounding rectangle coordinates "
1959 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1961 return AVERROR_INVALIDDATA;
1963 } else if (track->video.projection.private.size != 0) {
1964 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1965 return AVERROR_INVALIDDATA;
1968 if (l || t || r || b)
1969 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1971 projection = AV_SPHERICAL_EQUIRECTANGULAR;
1973 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
1974 if (track->video.projection.private.size < 4) {
1975 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1976 return AVERROR_INVALIDDATA;
1977 } else if (track->video.projection.private.size == 12) {
1978 uint32_t layout = bytestream2_get_be32(&gb);
1980 av_log(NULL, AV_LOG_WARNING,
1981 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1984 projection = AV_SPHERICAL_CUBEMAP;
1985 padding = bytestream2_get_be32(&gb);
1987 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1988 return AVERROR_INVALIDDATA;
1991 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
1992 /* No Spherical metadata */
1995 av_log(NULL, AV_LOG_WARNING,
1996 "Unknown spherical metadata type %"PRIu64"\n",
1997 track->video.projection.type);
2001 spherical = av_spherical_alloc(&spherical_size);
2003 return AVERROR(ENOMEM);
2005 spherical->projection = projection;
2007 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2008 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2009 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2011 spherical->padding = padding;
2013 spherical->bound_left = l;
2014 spherical->bound_top = t;
2015 spherical->bound_right = r;
2016 spherical->bound_bottom = b;
2018 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2021 av_freep(&spherical);
2028 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2030 const AVCodecTag *codec_tags;
2032 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2033 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2035 /* Normalize noncompliant private data that starts with the fourcc
2036 * by expanding/shifting the data by 4 bytes and storing the data
2037 * size at the start. */
2038 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2039 uint8_t *p = av_realloc(track->codec_priv.data,
2040 track->codec_priv.size + 4);
2042 return AVERROR(ENOMEM);
2043 memmove(p + 4, p, track->codec_priv.size);
2044 track->codec_priv.data = p;
2045 track->codec_priv.size += 4;
2046 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2049 *fourcc = AV_RL32(track->codec_priv.data + 4);
2050 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2055 static int matroska_parse_tracks(AVFormatContext *s)
2057 MatroskaDemuxContext *matroska = s->priv_data;
2058 MatroskaTrack *tracks = matroska->tracks.elem;
2063 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2064 MatroskaTrack *track = &tracks[i];
2065 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2066 EbmlList *encodings_list = &track->encodings;
2067 MatroskaTrackEncoding *encodings = encodings_list->elem;
2068 uint8_t *extradata = NULL;
2069 int extradata_size = 0;
2070 int extradata_offset = 0;
2071 uint32_t fourcc = 0;
2073 char* key_id_base64 = NULL;
2076 /* Apply some sanity checks. */
2077 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2078 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2079 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2080 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2081 av_log(matroska->ctx, AV_LOG_INFO,
2082 "Unknown or unsupported track type %"PRIu64"\n",
2086 if (!track->codec_id)
2089 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2090 isnan(track->audio.samplerate)) {
2091 av_log(matroska->ctx, AV_LOG_WARNING,
2092 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2093 track->audio.samplerate);
2094 track->audio.samplerate = 8000;
2097 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2098 if (!track->default_duration && track->video.frame_rate > 0) {
2099 double default_duration = 1000000000 / track->video.frame_rate;
2100 if (default_duration > UINT64_MAX || default_duration < 0) {
2101 av_log(matroska->ctx, AV_LOG_WARNING,
2102 "Invalid frame rate %e. Cannot calculate default duration.\n",
2103 track->video.frame_rate);
2105 track->default_duration = default_duration;
2108 if (track->video.display_width == -1)
2109 track->video.display_width = track->video.pixel_width;
2110 if (track->video.display_height == -1)
2111 track->video.display_height = track->video.pixel_height;
2112 if (track->video.color_space.size == 4)
2113 fourcc = AV_RL32(track->video.color_space.data);
2114 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2115 if (!track->audio.out_samplerate)
2116 track->audio.out_samplerate = track->audio.samplerate;
2118 if (encodings_list->nb_elem > 1) {
2119 av_log(matroska->ctx, AV_LOG_ERROR,
2120 "Multiple combined encodings not supported");
2121 } else if (encodings_list->nb_elem == 1) {
2122 if (encodings[0].type) {
2123 if (encodings[0].encryption.key_id.size > 0) {
2124 /* Save the encryption key id to be stored later as a
2126 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2127 key_id_base64 = av_malloc(b64_size);
2128 if (key_id_base64 == NULL)
2129 return AVERROR(ENOMEM);
2131 av_base64_encode(key_id_base64, b64_size,
2132 encodings[0].encryption.key_id.data,
2133 encodings[0].encryption.key_id.size);
2135 encodings[0].scope = 0;
2136 av_log(matroska->ctx, AV_LOG_ERROR,
2137 "Unsupported encoding type");
2141 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2144 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2147 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2149 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2150 encodings[0].scope = 0;
2151 av_log(matroska->ctx, AV_LOG_ERROR,
2152 "Unsupported encoding type");
2153 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2154 uint8_t *codec_priv = track->codec_priv.data;
2155 int ret = matroska_decode_buffer(&track->codec_priv.data,
2156 &track->codec_priv.size,
2159 track->codec_priv.data = NULL;
2160 track->codec_priv.size = 0;
2161 av_log(matroska->ctx, AV_LOG_ERROR,
2162 "Failed to decode codec private data\n");
2165 if (codec_priv != track->codec_priv.data)
2166 av_free(codec_priv);
2170 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2171 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2172 strlen(ff_mkv_codec_tags[j].str))) {
2173 codec_id = ff_mkv_codec_tags[j].id;
2178 st = track->stream = avformat_new_stream(s, NULL);
2180 av_free(key_id_base64);
2181 return AVERROR(ENOMEM);
2184 if (key_id_base64) {
2185 /* export encryption key id as base64 metadata tag */
2186 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2187 av_freep(&key_id_base64);
2190 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2191 track->codec_priv.size >= 40 &&
2192 track->codec_priv.data) {
2193 track->ms_compat = 1;
2194 bit_depth = AV_RL16(track->codec_priv.data + 14);
2195 fourcc = AV_RL32(track->codec_priv.data + 16);
2196 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2199 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2201 extradata_offset = 40;
2202 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2203 track->codec_priv.size >= 14 &&
2204 track->codec_priv.data) {
2206 ffio_init_context(&b, track->codec_priv.data,
2207 track->codec_priv.size,
2208 0, NULL, NULL, NULL, NULL);
2209 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2212 codec_id = st->codecpar->codec_id;
2213 fourcc = st->codecpar->codec_tag;
2214 extradata_offset = FFMIN(track->codec_priv.size, 18);
2215 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2216 /* Normally 36, but allow noncompliant private data */
2217 && (track->codec_priv.size >= 32)
2218 && (track->codec_priv.data)) {
2219 uint16_t sample_size;
2220 int ret = get_qt_codec(track, &fourcc, &codec_id);
2223 sample_size = AV_RB16(track->codec_priv.data + 26);
2225 if (sample_size == 8) {
2226 fourcc = MKTAG('r','a','w',' ');
2227 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2228 } else if (sample_size == 16) {
2229 fourcc = MKTAG('t','w','o','s');
2230 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2233 if ((fourcc == MKTAG('t','w','o','s') ||
2234 fourcc == MKTAG('s','o','w','t')) &&
2236 codec_id = AV_CODEC_ID_PCM_S8;
2237 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2238 (track->codec_priv.size >= 21) &&
2239 (track->codec_priv.data)) {
2240 int ret = get_qt_codec(track, &fourcc, &codec_id);
2243 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2244 fourcc = MKTAG('S','V','Q','3');
2245 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2247 if (codec_id == AV_CODEC_ID_NONE)
2248 av_log(matroska->ctx, AV_LOG_ERROR,
2249 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2250 if (track->codec_priv.size >= 86) {
2251 bit_depth = AV_RB16(track->codec_priv.data + 82);
2252 ffio_init_context(&b, track->codec_priv.data,
2253 track->codec_priv.size,
2254 0, NULL, NULL, NULL, NULL);
2255 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2257 track->has_palette = 1;
2260 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2261 switch (track->audio.bitdepth) {
2263 codec_id = AV_CODEC_ID_PCM_U8;
2266 codec_id = AV_CODEC_ID_PCM_S24BE;
2269 codec_id = AV_CODEC_ID_PCM_S32BE;
2272 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2273 switch (track->audio.bitdepth) {
2275 codec_id = AV_CODEC_ID_PCM_U8;
2278 codec_id = AV_CODEC_ID_PCM_S24LE;
2281 codec_id = AV_CODEC_ID_PCM_S32LE;
2284 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2285 track->audio.bitdepth == 64) {
2286 codec_id = AV_CODEC_ID_PCM_F64LE;
2287 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2288 int profile = matroska_aac_profile(track->codec_id);
2289 int sri = matroska_aac_sri(track->audio.samplerate);
2290 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2292 return AVERROR(ENOMEM);
2293 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2294 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2295 if (strstr(track->codec_id, "SBR")) {
2296 sri = matroska_aac_sri(track->audio.out_samplerate);
2297 extradata[2] = 0x56;
2298 extradata[3] = 0xE5;
2299 extradata[4] = 0x80 | (sri << 3);
2303 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2304 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2305 * Create the "atom size", "tag", and "tag version" fields the
2306 * decoder expects manually. */
2307 extradata_size = 12 + track->codec_priv.size;
2308 extradata = av_mallocz(extradata_size +
2309 AV_INPUT_BUFFER_PADDING_SIZE);
2311 return AVERROR(ENOMEM);
2312 AV_WB32(extradata, extradata_size);
2313 memcpy(&extradata[4], "alac", 4);
2314 AV_WB32(&extradata[8], 0);
2315 memcpy(&extradata[12], track->codec_priv.data,
2316 track->codec_priv.size);
2317 } else if (codec_id == AV_CODEC_ID_TTA) {
2318 extradata_size = 30;
2319 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2321 return AVERROR(ENOMEM);
2322 ffio_init_context(&b, extradata, extradata_size, 1,
2323 NULL, NULL, NULL, NULL);
2324 avio_write(&b, "TTA1", 4);
2326 if (track->audio.channels > UINT16_MAX ||
2327 track->audio.bitdepth > UINT16_MAX) {
2328 av_log(matroska->ctx, AV_LOG_WARNING,
2329 "Too large audio channel number %"PRIu64
2330 " or bitdepth %"PRIu64". Skipping track.\n",
2331 track->audio.channels, track->audio.bitdepth);
2332 av_freep(&extradata);
2333 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2334 return AVERROR_INVALIDDATA;
2338 avio_wl16(&b, track->audio.channels);
2339 avio_wl16(&b, track->audio.bitdepth);
2340 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2341 return AVERROR_INVALIDDATA;
2342 avio_wl32(&b, track->audio.out_samplerate);
2343 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2344 track->audio.out_samplerate,
2345 AV_TIME_BASE * 1000));
2346 } else if (codec_id == AV_CODEC_ID_RV10 ||
2347 codec_id == AV_CODEC_ID_RV20 ||
2348 codec_id == AV_CODEC_ID_RV30 ||
2349 codec_id == AV_CODEC_ID_RV40) {
2350 extradata_offset = 26;
2351 } else if (codec_id == AV_CODEC_ID_RA_144) {
2352 track->audio.out_samplerate = 8000;
2353 track->audio.channels = 1;
2354 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2355 codec_id == AV_CODEC_ID_COOK ||
2356 codec_id == AV_CODEC_ID_ATRAC3 ||
2357 codec_id == AV_CODEC_ID_SIPR)
2358 && track->codec_priv.data) {
2361 ffio_init_context(&b, track->codec_priv.data,
2362 track->codec_priv.size,
2363 0, NULL, NULL, NULL, NULL);
2365 flavor = avio_rb16(&b);
2366 track->audio.coded_framesize = avio_rb32(&b);
2368 track->audio.sub_packet_h = avio_rb16(&b);
2369 track->audio.frame_size = avio_rb16(&b);
2370 track->audio.sub_packet_size = avio_rb16(&b);
2372 track->audio.coded_framesize <= 0 ||
2373 track->audio.sub_packet_h <= 0 ||
2374 track->audio.frame_size <= 0 ||
2375 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2376 return AVERROR_INVALIDDATA;
2377 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2378 track->audio.frame_size);
2379 if (!track->audio.buf)
2380 return AVERROR(ENOMEM);
2381 if (codec_id == AV_CODEC_ID_RA_288) {
2382 st->codecpar->block_align = track->audio.coded_framesize;
2383 track->codec_priv.size = 0;
2385 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2386 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2387 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2388 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2390 st->codecpar->block_align = track->audio.sub_packet_size;
2391 extradata_offset = 78;
2393 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2394 ret = matroska_parse_flac(s, track, &extradata_offset);
2397 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2398 fourcc = AV_RL32(track->codec_priv.data);
2399 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2400 /* we don't need any value stored in CodecPrivate.
2401 make sure that it's not exported as extradata. */
2402 track->codec_priv.size = 0;
2404 track->codec_priv.size -= extradata_offset;
2406 if (codec_id == AV_CODEC_ID_NONE)
2407 av_log(matroska->ctx, AV_LOG_INFO,
2408 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2410 if (track->time_scale < 0.01)
2411 track->time_scale = 1.0;
2412 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2413 1000 * 1000 * 1000); /* 64 bit pts in ns */
2415 /* convert the delay from ns to the track timebase */
2416 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2417 (AVRational){ 1, 1000000000 },
2420 st->codecpar->codec_id = codec_id;
2422 if (strcmp(track->language, "und"))
2423 av_dict_set(&st->metadata, "language", track->language, 0);
2424 av_dict_set(&st->metadata, "title", track->name, 0);
2426 if (track->flag_default)
2427 st->disposition |= AV_DISPOSITION_DEFAULT;
2428 if (track->flag_forced)
2429 st->disposition |= AV_DISPOSITION_FORCED;
2431 if (!st->codecpar->extradata) {
2433 st->codecpar->extradata = extradata;
2434 st->codecpar->extradata_size = extradata_size;
2435 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2436 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2437 return AVERROR(ENOMEM);
2438 memcpy(st->codecpar->extradata,
2439 track->codec_priv.data + extradata_offset,
2440 track->codec_priv.size);
2444 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2445 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2446 int display_width_mul = 1;
2447 int display_height_mul = 1;
2449 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2450 st->codecpar->codec_tag = fourcc;
2452 st->codecpar->bits_per_coded_sample = bit_depth;
2453 st->codecpar->width = track->video.pixel_width;
2454 st->codecpar->height = track->video.pixel_height;
2456 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2457 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2458 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2459 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2461 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2462 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2464 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2465 av_reduce(&st->sample_aspect_ratio.num,
2466 &st->sample_aspect_ratio.den,
2467 st->codecpar->height * track->video.display_width * display_width_mul,
2468 st->codecpar->width * track->video.display_height * display_height_mul,
2471 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2472 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2474 if (track->default_duration) {
2475 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2476 1000000000, track->default_duration, 30000);
2477 #if FF_API_R_FRAME_RATE
2478 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2479 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2480 st->r_frame_rate = st->avg_frame_rate;
2484 /* export stereo mode flag as metadata tag */
2485 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2486 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2488 /* export alpha mode flag as metadata tag */
2489 if (track->video.alpha_mode)
2490 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2492 /* if we have virtual track, mark the real tracks */
2493 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2495 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2497 snprintf(buf, sizeof(buf), "%s_%d",
2498 ff_matroska_video_stereo_plane[planes[j].type], i);
2499 for (k=0; k < matroska->tracks.nb_elem; k++)
2500 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2501 av_dict_set(&tracks[k].stream->metadata,
2502 "stereo_mode", buf, 0);
2506 // add stream level stereo3d side data if it is a supported format
2507 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2508 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2509 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2514 ret = mkv_parse_video_color(st, track);
2517 ret = mkv_parse_video_projection(st, track);
2520 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2521 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2522 st->codecpar->codec_tag = fourcc;
2523 st->codecpar->sample_rate = track->audio.out_samplerate;
2524 st->codecpar->channels = track->audio.channels;
2525 if (!st->codecpar->bits_per_coded_sample)
2526 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2527 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2528 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2529 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2530 st->need_parsing = AVSTREAM_PARSE_FULL;
2531 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2532 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2533 if (track->codec_delay > 0) {
2534 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2535 (AVRational){1, 1000000000},
2536 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2537 48000 : st->codecpar->sample_rate});
2539 if (track->seek_preroll > 0) {
2540 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2541 (AVRational){1, 1000000000},
2542 (AVRational){1, st->codecpar->sample_rate});
2544 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2545 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2547 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2548 st->disposition |= AV_DISPOSITION_CAPTIONS;
2549 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2550 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2551 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2552 st->disposition |= AV_DISPOSITION_METADATA;
2554 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2555 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2556 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2557 matroska->contains_ssa = 1;
2564 static int matroska_read_header(AVFormatContext *s)
2566 MatroskaDemuxContext *matroska = s->priv_data;
2567 EbmlList *attachments_list = &matroska->attachments;
2568 EbmlList *chapters_list = &matroska->chapters;
2569 MatroskaAttachment *attachments;
2570 MatroskaChapter *chapters;
2571 uint64_t max_start = 0;
2577 matroska->cues_parsing_deferred = 1;
2579 /* First read the EBML header. */
2580 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2581 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2582 ebml_free(ebml_syntax, &ebml);
2583 return AVERROR_INVALIDDATA;
2585 if (ebml.version > EBML_VERSION ||
2586 ebml.max_size > sizeof(uint64_t) ||
2587 ebml.id_length > sizeof(uint32_t) ||
2588 ebml.doctype_version > 3) {
2589 avpriv_report_missing_feature(matroska->ctx,
2590 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2591 ebml.version, ebml.doctype, ebml.doctype_version);
2592 ebml_free(ebml_syntax, &ebml);
2593 return AVERROR_PATCHWELCOME;
2594 } else if (ebml.doctype_version == 3) {
2595 av_log(matroska->ctx, AV_LOG_WARNING,
2596 "EBML header using unsupported features\n"
2597 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2598 ebml.version, ebml.doctype, ebml.doctype_version);
2600 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2601 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2603 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2604 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2605 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2606 ebml_free(ebml_syntax, &ebml);
2607 return AVERROR_INVALIDDATA;
2610 ebml_free(ebml_syntax, &ebml);
2612 /* The next thing is a segment. */
2613 pos = avio_tell(matroska->ctx->pb);
2614 res = ebml_parse(matroska, matroska_segments, matroska);
2615 // try resyncing until we find a EBML_STOP type element.
2617 res = matroska_resync(matroska, pos);
2620 pos = avio_tell(matroska->ctx->pb);
2621 res = ebml_parse(matroska, matroska_segment, matroska);
2623 matroska_execute_seekhead(matroska);
2625 if (!matroska->time_scale)
2626 matroska->time_scale = 1000000;
2627 if (matroska->duration)
2628 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2629 1000 / AV_TIME_BASE;
2630 av_dict_set(&s->metadata, "title", matroska->title, 0);
2631 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2633 if (matroska->date_utc.size == 8)
2634 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2636 res = matroska_parse_tracks(s);
2640 attachments = attachments_list->elem;
2641 for (j = 0; j < attachments_list->nb_elem; j++) {
2642 if (!(attachments[j].filename && attachments[j].mime &&
2643 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2644 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2646 AVStream *st = avformat_new_stream(s, NULL);
2649 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2650 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2651 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2653 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2654 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2655 strlen(ff_mkv_image_mime_tags[i].str))) {
2656 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2661 attachments[j].stream = st;
2663 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2664 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2665 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2667 av_init_packet(&st->attached_pic);
2668 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2670 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2671 st->attached_pic.stream_index = st->index;
2672 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2674 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2675 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2677 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2678 attachments[j].bin.size);
2680 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2681 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2682 strlen(ff_mkv_mime_tags[i].str))) {
2683 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2691 chapters = chapters_list->elem;
2692 for (i = 0; i < chapters_list->nb_elem; i++)
2693 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2694 (max_start == 0 || chapters[i].start > max_start)) {
2695 chapters[i].chapter =
2696 avpriv_new_chapter(s, chapters[i].uid,
2697 (AVRational) { 1, 1000000000 },
2698 chapters[i].start, chapters[i].end,
2700 if (chapters[i].chapter) {
2701 av_dict_set(&chapters[i].chapter->metadata,
2702 "title", chapters[i].title, 0);
2704 max_start = chapters[i].start;
2707 matroska_add_index_entries(matroska);
2709 matroska_convert_tags(s);
2713 matroska_read_close(s);
2718 * Put one packet in an application-supplied AVPacket struct.
2719 * Returns 0 on success or -1 on failure.
2721 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2724 if (matroska->queue) {
2725 MatroskaTrack *tracks = matroska->tracks.elem;
2726 MatroskaTrack *track;
2728 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2729 track = &tracks[pkt->stream_index];
2730 if (track->has_palette) {
2731 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2733 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2735 memcpy(pal, track->palette, AVPALETTE_SIZE);
2737 track->has_palette = 0;
2746 * Free all packets in our internal queue.
2748 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2750 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2753 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2754 int *buf_size, int type,
2755 uint32_t **lace_buf, int *laces)
2757 int res = 0, n, size = *buf_size;
2758 uint8_t *data = *buf;
2759 uint32_t *lace_size;
2763 *lace_buf = av_mallocz(sizeof(int));
2765 return AVERROR(ENOMEM);
2767 *lace_buf[0] = size;
2771 av_assert0(size > 0);
2775 lace_size = av_mallocz(*laces * sizeof(int));
2777 return AVERROR(ENOMEM);
2780 case 0x1: /* Xiph lacing */
2784 for (n = 0; res == 0 && n < *laces - 1; n++) {
2786 if (size <= total) {
2787 res = AVERROR_INVALIDDATA;
2792 lace_size[n] += temp;
2799 if (size <= total) {
2800 res = AVERROR_INVALIDDATA;
2804 lace_size[n] = size - total;
2808 case 0x2: /* fixed-size lacing */
2809 if (size % (*laces)) {
2810 res = AVERROR_INVALIDDATA;
2813 for (n = 0; n < *laces; n++)
2814 lace_size[n] = size / *laces;
2817 case 0x3: /* EBML lacing */
2821 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2822 if (n < 0 || num > INT_MAX) {
2823 av_log(matroska->ctx, AV_LOG_INFO,
2824 "EBML block data error\n");
2825 res = n<0 ? n : AVERROR_INVALIDDATA;
2830 total = lace_size[0] = num;
2831 for (n = 1; res == 0 && n < *laces - 1; n++) {
2834 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2835 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2836 av_log(matroska->ctx, AV_LOG_INFO,
2837 "EBML block data error\n");
2838 res = r<0 ? r : AVERROR_INVALIDDATA;
2843 lace_size[n] = lace_size[n - 1] + snum;
2844 total += lace_size[n];
2846 if (size <= total) {
2847 res = AVERROR_INVALIDDATA;
2850 lace_size[*laces - 1] = size - total;
2856 *lace_buf = lace_size;
2862 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2863 MatroskaTrack *track, AVStream *st,
2864 uint8_t *data, int size, uint64_t timecode,
2867 int a = st->codecpar->block_align;
2868 int sps = track->audio.sub_packet_size;
2869 int cfs = track->audio.coded_framesize;
2870 int h = track->audio.sub_packet_h;
2871 int y = track->audio.sub_packet_cnt;
2872 int w = track->audio.frame_size;
2875 if (!track->audio.pkt_cnt) {
2876 if (track->audio.sub_packet_cnt == 0)
2877 track->audio.buf_timecode = timecode;
2878 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2879 if (size < cfs * h / 2) {
2880 av_log(matroska->ctx, AV_LOG_ERROR,
2881 "Corrupt int4 RM-style audio packet size\n");
2882 return AVERROR_INVALIDDATA;
2884 for (x = 0; x < h / 2; x++)
2885 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2886 data + x * cfs, cfs);
2887 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2889 av_log(matroska->ctx, AV_LOG_ERROR,
2890 "Corrupt sipr RM-style audio packet size\n");
2891 return AVERROR_INVALIDDATA;
2893 memcpy(track->audio.buf + y * w, data, w);
2895 if (size < sps * w / sps || h<=0 || w%sps) {
2896 av_log(matroska->ctx, AV_LOG_ERROR,
2897 "Corrupt generic RM-style audio packet size\n");
2898 return AVERROR_INVALIDDATA;
2900 for (x = 0; x < w / sps; x++)
2901 memcpy(track->audio.buf +
2902 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2903 data + x * sps, sps);
2906 if (++track->audio.sub_packet_cnt >= h) {
2907 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2908 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2909 track->audio.sub_packet_cnt = 0;
2910 track->audio.pkt_cnt = h * w / a;
2914 while (track->audio.pkt_cnt) {
2916 AVPacket pktl, *pkt = &pktl;
2918 ret = av_new_packet(pkt, a);
2923 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2925 pkt->pts = track->audio.buf_timecode;
2926 track->audio.buf_timecode = AV_NOPTS_VALUE;
2928 pkt->stream_index = st->index;
2929 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2931 av_packet_unref(pkt);
2932 return AVERROR(ENOMEM);
2939 /* reconstruct full wavpack blocks from mangled matroska ones */
2940 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2941 uint8_t **pdst, int *size)
2943 uint8_t *dst = NULL;
2948 int ret, offset = 0;
2950 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2951 return AVERROR_INVALIDDATA;
2953 ver = AV_RL16(track->stream->codecpar->extradata);
2955 samples = AV_RL32(src);
2959 while (srclen >= 8) {
2964 uint32_t flags = AV_RL32(src);
2965 uint32_t crc = AV_RL32(src + 4);
2969 multiblock = (flags & 0x1800) != 0x1800;
2972 ret = AVERROR_INVALIDDATA;
2975 blocksize = AV_RL32(src);
2981 if (blocksize > srclen) {
2982 ret = AVERROR_INVALIDDATA;
2986 tmp = av_realloc(dst, dstlen + blocksize + 32);
2988 ret = AVERROR(ENOMEM);
2992 dstlen += blocksize + 32;
2994 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
2995 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
2996 AV_WL16(dst + offset + 8, ver); // version
2997 AV_WL16(dst + offset + 10, 0); // track/index_no
2998 AV_WL32(dst + offset + 12, 0); // total samples
2999 AV_WL32(dst + offset + 16, 0); // block index
3000 AV_WL32(dst + offset + 20, samples); // number of samples
3001 AV_WL32(dst + offset + 24, flags); // flags
3002 AV_WL32(dst + offset + 28, crc); // crc
3003 memcpy(dst + offset + 32, src, blocksize); // block data
3006 srclen -= blocksize;
3007 offset += blocksize + 32;
3020 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3021 MatroskaTrack *track,
3023 uint8_t *data, int data_len,
3028 AVPacket pktl, *pkt = &pktl;
3029 uint8_t *id, *settings, *text, *buf;
3030 int id_len, settings_len, text_len;
3035 return AVERROR_INVALIDDATA;
3038 q = data + data_len;
3043 if (*p == '\r' || *p == '\n') {
3052 if (p >= q || *p != '\n')
3053 return AVERROR_INVALIDDATA;
3059 if (*p == '\r' || *p == '\n') {
3060 settings_len = p - settings;
3068 if (p >= q || *p != '\n')
3069 return AVERROR_INVALIDDATA;
3074 while (text_len > 0) {
3075 const int len = text_len - 1;
3076 const uint8_t c = p[len];
3077 if (c != '\r' && c != '\n')
3083 return AVERROR_INVALIDDATA;
3085 err = av_new_packet(pkt, text_len);
3090 memcpy(pkt->data, text, text_len);
3093 buf = av_packet_new_side_data(pkt,
3094 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3097 av_packet_unref(pkt);
3098 return AVERROR(ENOMEM);
3100 memcpy(buf, id, id_len);
3103 if (settings_len > 0) {
3104 buf = av_packet_new_side_data(pkt,
3105 AV_PKT_DATA_WEBVTT_SETTINGS,
3108 av_packet_unref(pkt);
3109 return AVERROR(ENOMEM);
3111 memcpy(buf, settings, settings_len);
3114 // Do we need this for subtitles?
3115 // pkt->flags = AV_PKT_FLAG_KEY;
3117 pkt->stream_index = st->index;
3118 pkt->pts = timecode;
3120 // Do we need this for subtitles?
3121 // pkt->dts = timecode;
3123 pkt->duration = duration;
3126 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3128 av_packet_unref(pkt);
3129 return AVERROR(ENOMEM);
3135 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3136 MatroskaTrack *track, AVStream *st,
3137 uint8_t *data, int pkt_size,
3138 uint64_t timecode, uint64_t lace_duration,
3139 int64_t pos, int is_keyframe,
3140 uint8_t *additional, uint64_t additional_id, int additional_size,
3141 int64_t discard_padding)
3143 MatroskaTrackEncoding *encodings = track->encodings.elem;
3144 uint8_t *pkt_data = data;
3145 int offset = 0, res;
3146 AVPacket pktl, *pkt = &pktl;
3148 if (encodings && !encodings->type && encodings->scope & 1) {
3149 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3154 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3156 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3158 av_log(matroska->ctx, AV_LOG_ERROR,
3159 "Error parsing a wavpack block.\n");
3162 if (pkt_data != data)
3163 av_freep(&pkt_data);
3167 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3168 AV_RB32(&data[4]) != MKBETAG('i', 'c', 'p', 'f'))
3171 /* XXX: prevent data copy... */
3172 if (av_new_packet(pkt, pkt_size + offset) < 0) {
3173 res = AVERROR(ENOMEM);
3177 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES && offset == 8) {
3178 uint8_t *buf = pkt->data;
3179 bytestream_put_be32(&buf, pkt_size);
3180 bytestream_put_be32(&buf, MKBETAG('i', 'c', 'p', 'f'));
3183 memcpy(pkt->data + offset, pkt_data, pkt_size);
3185 if (pkt_data != data)
3186 av_freep(&pkt_data);
3188 pkt->flags = is_keyframe;
3189 pkt->stream_index = st->index;
3191 if (additional_size > 0) {
3192 uint8_t *side_data = av_packet_new_side_data(pkt,
3193 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3194 additional_size + 8);
3196 av_packet_unref(pkt);
3197 return AVERROR(ENOMEM);
3199 AV_WB64(side_data, additional_id);
3200 memcpy(side_data + 8, additional, additional_size);
3203 if (discard_padding) {
3204 uint8_t *side_data = av_packet_new_side_data(pkt,
3205 AV_PKT_DATA_SKIP_SAMPLES,
3208 av_packet_unref(pkt);
3209 return AVERROR(ENOMEM);
3211 discard_padding = av_rescale_q(discard_padding,
3212 (AVRational){1, 1000000000},
3213 (AVRational){1, st->codecpar->sample_rate});
3214 if (discard_padding > 0) {
3215 AV_WL32(side_data + 4, discard_padding);
3217 AV_WL32(side_data, -discard_padding);
3221 if (track->ms_compat)
3222 pkt->dts = timecode;
3224 pkt->pts = timecode;
3226 pkt->duration = lace_duration;
3228 #if FF_API_CONVERGENCE_DURATION
3229 FF_DISABLE_DEPRECATION_WARNINGS
3230 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3231 pkt->convergence_duration = lace_duration;
3233 FF_ENABLE_DEPRECATION_WARNINGS
3236 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3238 av_packet_unref(pkt);
3239 return AVERROR(ENOMEM);
3245 if (pkt_data != data)
3246 av_freep(&pkt_data);
3250 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
3251 int size, int64_t pos, uint64_t cluster_time,
3252 uint64_t block_duration, int is_keyframe,
3253 uint8_t *additional, uint64_t additional_id, int additional_size,
3254 int64_t cluster_pos, int64_t discard_padding)
3256 uint64_t timecode = AV_NOPTS_VALUE;
3257 MatroskaTrack *track;
3261 uint32_t *lace_size = NULL;
3262 int n, flags, laces = 0;
3264 int trust_default_duration = 1;
3266 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3267 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3273 track = matroska_find_track_by_num(matroska, num);
3274 if (!track || !track->stream) {
3275 av_log(matroska->ctx, AV_LOG_INFO,
3276 "Invalid stream %"PRIu64" or size %u\n", num, size);
3277 return AVERROR_INVALIDDATA;
3278 } else if (size <= 3)
3281 if (st->discard >= AVDISCARD_ALL)
3283 av_assert1(block_duration != AV_NOPTS_VALUE);
3285 block_time = sign_extend(AV_RB16(data), 16);
3289 if (is_keyframe == -1)
3290 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3292 if (cluster_time != (uint64_t) -1 &&
3293 (block_time >= 0 || cluster_time >= -block_time)) {
3294 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3295 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3296 timecode < track->end_timecode)
3297 is_keyframe = 0; /* overlapping subtitles are not key frame */
3299 ff_reduce_index(matroska->ctx, st->index);
3300 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3305 if (matroska->skip_to_keyframe &&
3306 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3307 // Compare signed timecodes. Timecode may be negative due to codec delay
3308 // offset. We don't support timestamps greater than int64_t anyway - see
3310 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3313 matroska->skip_to_keyframe = 0;
3314 else if (!st->skip_to_keyframe) {
3315 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3316 matroska->skip_to_keyframe = 0;
3320 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3321 &lace_size, &laces);
3326 if (track->audio.samplerate == 8000) {
3327 // If this is needed for more codecs, then add them here
3328 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3329 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3330 trust_default_duration = 0;
3334 if (!block_duration && trust_default_duration)
3335 block_duration = track->default_duration * laces / matroska->time_scale;
3337 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3338 track->end_timecode =
3339 FFMAX(track->end_timecode, timecode + block_duration);
3341 for (n = 0; n < laces; n++) {
3342 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3344 if (lace_size[n] > size) {
3345 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3349 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3350 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3351 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3352 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3353 st->codecpar->block_align && track->audio.sub_packet_size) {
3354 res = matroska_parse_rm_audio(matroska, track, st, data,
3360 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3361 res = matroska_parse_webvtt(matroska, track, st,
3363 timecode, lace_duration,
3368 res = matroska_parse_frame(matroska, track, st, data, lace_size[n],
3369 timecode, lace_duration, pos,
3370 !n ? is_keyframe : 0,
3371 additional, additional_id, additional_size,
3377 if (timecode != AV_NOPTS_VALUE)
3378 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3379 data += lace_size[n];
3380 size -= lace_size[n];
3388 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3390 EbmlList *blocks_list;
3391 MatroskaBlock *blocks;
3393 res = ebml_parse(matroska,
3394 matroska_cluster_incremental_parsing,
3395 &matroska->current_cluster);
3398 if (matroska->current_cluster_pos)
3399 ebml_level_end(matroska);
3400 ebml_free(matroska_cluster, &matroska->current_cluster);
3401 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3402 matroska->current_cluster_num_blocks = 0;
3403 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3404 /* sizeof the ID which was already read */
3405 if (matroska->current_id)
3406 matroska->current_cluster_pos -= 4;
3407 res = ebml_parse(matroska,
3408 matroska_clusters_incremental,
3409 &matroska->current_cluster);
3410 /* Try parsing the block again. */
3412 res = ebml_parse(matroska,
3413 matroska_cluster_incremental_parsing,
3414 &matroska->current_cluster);
3418 matroska->current_cluster_num_blocks <
3419 matroska->current_cluster.blocks.nb_elem) {
3420 blocks_list = &matroska->current_cluster.blocks;
3421 blocks = blocks_list->elem;
3423 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3424 i = blocks_list->nb_elem - 1;
3425 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3426 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3427 uint8_t* additional = blocks[i].additional.size > 0 ?
3428 blocks[i].additional.data : NULL;
3429 if (!blocks[i].non_simple)
3430 blocks[i].duration = 0;
3431 res = matroska_parse_block(matroska, blocks[i].bin.data,
3432 blocks[i].bin.size, blocks[i].bin.pos,
3433 matroska->current_cluster.timecode,
3434 blocks[i].duration, is_keyframe,
3435 additional, blocks[i].additional_id,
3436 blocks[i].additional.size,
3437 matroska->current_cluster_pos,
3438 blocks[i].discard_padding);
3445 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3447 MatroskaCluster cluster = { 0 };
3448 EbmlList *blocks_list;
3449 MatroskaBlock *blocks;
3453 if (!matroska->contains_ssa)
3454 return matroska_parse_cluster_incremental(matroska);
3455 pos = avio_tell(matroska->ctx->pb);
3456 if (matroska->current_id)
3457 pos -= 4; /* sizeof the ID which was already read */
3458 res = ebml_parse(matroska, matroska_clusters, &cluster);
3459 blocks_list = &cluster.blocks;
3460 blocks = blocks_list->elem;
3461 for (i = 0; i < blocks_list->nb_elem; i++)
3462 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3463 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3464 res = matroska_parse_block(matroska, blocks[i].bin.data,
3465 blocks[i].bin.size, blocks[i].bin.pos,
3466 cluster.timecode, blocks[i].duration,
3467 is_keyframe, NULL, 0, 0, pos,
3468 blocks[i].discard_padding);
3470 ebml_free(matroska_cluster, &cluster);
3474 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3476 MatroskaDemuxContext *matroska = s->priv_data;
3479 while (matroska_deliver_packet(matroska, pkt)) {
3480 int64_t pos = avio_tell(matroska->ctx->pb);
3482 return (ret < 0) ? ret : AVERROR_EOF;
3483 if (matroska_parse_cluster(matroska) < 0)
3484 ret = matroska_resync(matroska, pos);
3490 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3491 int64_t timestamp, int flags)
3493 MatroskaDemuxContext *matroska = s->priv_data;
3494 MatroskaTrack *tracks = NULL;
3495 AVStream *st = s->streams[stream_index];
3496 int i, index, index_min;
3498 /* Parse the CUES now since we need the index data to seek. */
3499 if (matroska->cues_parsing_deferred > 0) {
3500 matroska->cues_parsing_deferred = 0;
3501 matroska_parse_cues(matroska);
3504 if (!st->nb_index_entries)
3506 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3508 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3509 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3511 matroska->current_id = 0;
3512 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3513 matroska_clear_queue(matroska);
3514 if (matroska_parse_cluster(matroska) < 0)
3519 matroska_clear_queue(matroska);
3520 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3524 tracks = matroska->tracks.elem;
3525 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3526 tracks[i].audio.pkt_cnt = 0;
3527 tracks[i].audio.sub_packet_cnt = 0;
3528 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3529 tracks[i].end_timecode = 0;
3532 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3533 matroska->current_id = 0;
3534 if (flags & AVSEEK_FLAG_ANY) {
3535 st->skip_to_keyframe = 0;
3536 matroska->skip_to_timecode = timestamp;
3538 st->skip_to_keyframe = 1;
3539 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3541 matroska->skip_to_keyframe = 1;
3543 matroska->num_levels = 0;
3544 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3547 // slightly hackish but allows proper fallback to
3548 // the generic seeking code.
3549 matroska_clear_queue(matroska);
3550 matroska->current_id = 0;
3551 st->skip_to_keyframe =
3552 matroska->skip_to_keyframe = 0;
3554 matroska->num_levels = 0;
3558 static int matroska_read_close(AVFormatContext *s)
3560 MatroskaDemuxContext *matroska = s->priv_data;
3561 MatroskaTrack *tracks = matroska->tracks.elem;
3564 matroska_clear_queue(matroska);
3566 for (n = 0; n < matroska->tracks.nb_elem; n++)
3567 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3568 av_freep(&tracks[n].audio.buf);
3569 ebml_free(matroska_cluster, &matroska->current_cluster);
3570 ebml_free(matroska_segment, matroska);
3576 int64_t start_time_ns;
3577 int64_t end_time_ns;
3578 int64_t start_offset;
3582 /* This function searches all the Cues and returns the CueDesc corresponding to
3583 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3584 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3586 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3587 MatroskaDemuxContext *matroska = s->priv_data;
3590 int nb_index_entries = s->streams[0]->nb_index_entries;
3591 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3592 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3593 for (i = 1; i < nb_index_entries; i++) {
3594 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3595 index_entries[i].timestamp * matroska->time_scale > ts) {
3600 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3601 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3602 if (i != nb_index_entries - 1) {
3603 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3604 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3606 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3607 // FIXME: this needs special handling for files where Cues appear
3608 // before Clusters. the current logic assumes Cues appear after
3610 cue_desc.end_offset = cues_start - matroska->segment_start;
3615 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3617 MatroskaDemuxContext *matroska = s->priv_data;
3618 int64_t cluster_pos, before_pos;
3620 if (s->streams[0]->nb_index_entries <= 0) return 0;
3621 // seek to the first cluster using cues.
3622 index = av_index_search_timestamp(s->streams[0], 0, 0);
3623 if (index < 0) return 0;
3624 cluster_pos = s->streams[0]->index_entries[index].pos;
3625 before_pos = avio_tell(s->pb);
3627 int64_t cluster_id = 0, cluster_length = 0;
3629 avio_seek(s->pb, cluster_pos, SEEK_SET);
3630 // read cluster id and length
3631 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3632 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3633 if (cluster_id != 0xF43B675) { // done with all clusters
3636 avio_seek(s->pb, cluster_pos, SEEK_SET);
3637 matroska->current_id = 0;
3638 matroska_clear_queue(matroska);
3639 if (matroska_parse_cluster(matroska) < 0 ||
3643 pkt = &matroska->queue->pkt;
3644 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3645 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3650 avio_seek(s->pb, before_pos, SEEK_SET);
3654 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3655 double min_buffer, double* buffer,
3656 double* sec_to_download, AVFormatContext *s,
3659 double nano_seconds_per_second = 1000000000.0;
3660 double time_sec = time_ns / nano_seconds_per_second;
3662 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3663 int64_t end_time_ns = time_ns + time_to_search_ns;
3664 double sec_downloaded = 0.0;
3665 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3666 if (desc_curr.start_time_ns == -1)
3668 *sec_to_download = 0.0;
3670 // Check for non cue start time.
3671 if (time_ns > desc_curr.start_time_ns) {
3672 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3673 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3674 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3675 double timeToDownload = (cueBytes * 8.0) / bps;
3677 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3678 *sec_to_download += timeToDownload;
3680 // Check if the search ends within the first cue.
3681 if (desc_curr.end_time_ns >= end_time_ns) {
3682 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3683 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3684 sec_downloaded = percent_to_sub * sec_downloaded;
3685 *sec_to_download = percent_to_sub * *sec_to_download;
3688 if ((sec_downloaded + *buffer) <= min_buffer) {
3692 // Get the next Cue.
3693 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3696 while (desc_curr.start_time_ns != -1) {
3697 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3698 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3699 double desc_sec = desc_ns / nano_seconds_per_second;
3700 double bits = (desc_bytes * 8.0);
3701 double time_to_download = bits / bps;
3703 sec_downloaded += desc_sec - time_to_download;
3704 *sec_to_download += time_to_download;
3706 if (desc_curr.end_time_ns >= end_time_ns) {
3707 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3708 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3709 sec_downloaded = percent_to_sub * sec_downloaded;
3710 *sec_to_download = percent_to_sub * *sec_to_download;
3712 if ((sec_downloaded + *buffer) <= min_buffer)
3717 if ((sec_downloaded + *buffer) <= min_buffer) {
3722 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3724 *buffer = *buffer + sec_downloaded;
3728 /* This function computes the bandwidth of the WebM file with the help of
3729 * buffer_size_after_time_downloaded() function. Both of these functions are
3730 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3731 * Matroska parsing mechanism.
3733 * Returns the bandwidth of the file on success; -1 on error.
3735 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3737 MatroskaDemuxContext *matroska = s->priv_data;
3738 AVStream *st = s->streams[0];
3739 double bandwidth = 0.0;
3742 for (i = 0; i < st->nb_index_entries; i++) {
3743 int64_t prebuffer_ns = 1000000000;
3744 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3745 double nano_seconds_per_second = 1000000000.0;
3746 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3747 double prebuffer_bytes = 0.0;
3748 int64_t temp_prebuffer_ns = prebuffer_ns;
3749 int64_t pre_bytes, pre_ns;
3750 double pre_sec, prebuffer, bits_per_second;
3751 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3753 // Start with the first Cue.
3754 CueDesc desc_end = desc_beg;
3756 // Figure out how much data we have downloaded for the prebuffer. This will
3757 // be used later to adjust the bits per sample to try.
3758 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3759 // Prebuffered the entire Cue.
3760 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3761 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3762 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3764 if (desc_end.start_time_ns == -1) {
3765 // The prebuffer is larger than the duration.
3766 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3768 bits_per_second = 0.0;
3770 // The prebuffer ends in the last Cue. Estimate how much data was
3772 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3773 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3774 pre_sec = pre_ns / nano_seconds_per_second;
3776 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3778 prebuffer = prebuffer_ns / nano_seconds_per_second;
3780 // Set this to 0.0 in case our prebuffer buffers the entire video.
3781 bits_per_second = 0.0;
3783 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3784 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3785 double desc_sec = desc_ns / nano_seconds_per_second;
3786 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3788 // Drop the bps by the percentage of bytes buffered.
3789 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3790 double mod_bits_per_second = calc_bits_per_second * percent;
3792 if (prebuffer < desc_sec) {
3794 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3796 // Add 1 so the bits per second should be a little bit greater than file
3798 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3799 const double min_buffer = 0.0;
3800 double buffer = prebuffer;
3801 double sec_to_download = 0.0;
3803 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3804 min_buffer, &buffer, &sec_to_download,
3808 } else if (rv == 0) {
3809 bits_per_second = (double)(bps);
3814 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3815 } while (desc_end.start_time_ns != -1);
3817 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3819 return (int64_t)bandwidth;
3822 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3824 MatroskaDemuxContext *matroska = s->priv_data;
3825 EbmlList *seekhead_list = &matroska->seekhead;
3826 MatroskaSeekhead *seekhead = seekhead_list->elem;
3828 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3832 // determine cues start and end positions
3833 for (i = 0; i < seekhead_list->nb_elem; i++)
3834 if (seekhead[i].id == MATROSKA_ID_CUES)
3837 if (i >= seekhead_list->nb_elem) return -1;
3839 before_pos = avio_tell(matroska->ctx->pb);
3840 cues_start = seekhead[i].pos + matroska->segment_start;
3841 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3842 // cues_end is computed as cues_start + cues_length + length of the
3843 // Cues element ID + EBML length of the Cues element. cues_end is
3844 // inclusive and the above sum is reduced by 1.
3845 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3846 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3847 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3848 cues_end = cues_start + cues_length + bytes_read - 1;
3850 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3851 if (cues_start == -1 || cues_end == -1) return -1;
3854 matroska_parse_cues(matroska);
3857 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3860 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3862 // if the file has cues at the start, fix up the init range so tht
3863 // it does not include it
3864 if (cues_start <= init_range)
3865 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3868 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3869 if (bandwidth < 0) return -1;
3870 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3872 // check if all clusters start with key frames
3873 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3875 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3876 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3877 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20 * sizeof(char));
3878 if (!buf) return -1;
3880 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3881 int ret = snprintf(buf + end, 20 * sizeof(char),
3882 "%" PRId64, s->streams[0]->index_entries[i].timestamp);
3883 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3884 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3886 return AVERROR_INVALIDDATA;
3889 if (i != s->streams[0]->nb_index_entries - 1) {
3890 strncat(buf, ",", sizeof(char));
3894 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3900 static int webm_dash_manifest_read_header(AVFormatContext *s)
3903 int ret = matroska_read_header(s);
3905 MatroskaTrack *tracks;
3906 MatroskaDemuxContext *matroska = s->priv_data;
3908 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3911 if (!s->nb_streams) {
3912 matroska_read_close(s);
3913 av_log(s, AV_LOG_ERROR, "No streams found\n");
3914 return AVERROR_INVALIDDATA;
3917 if (!matroska->is_live) {
3918 buf = av_asprintf("%g", matroska->duration);
3919 if (!buf) return AVERROR(ENOMEM);
3920 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3923 // initialization range
3924 // 5 is the offset of Cluster ID.
3925 init_range = avio_tell(s->pb) - 5;
3926 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3929 // basename of the file
3930 buf = strrchr(s->url, '/');
3931 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
3934 tracks = matroska->tracks.elem;
3935 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3937 // parse the cues and populate Cue related fields
3938 if (!matroska->is_live) {
3939 ret = webm_dash_manifest_cues(s, init_range);
3941 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
3946 // use the bandwidth from the command line if it was provided
3947 if (matroska->bandwidth > 0) {
3948 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
3949 matroska->bandwidth, 0);
3954 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
3959 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
3960 static const AVOption options[] = {
3961 { "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 },
3962 { "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 },
3966 static const AVClass webm_dash_class = {
3967 .class_name = "WebM DASH Manifest demuxer",
3968 .item_name = av_default_item_name,
3970 .version = LIBAVUTIL_VERSION_INT,
3973 AVInputFormat ff_matroska_demuxer = {
3974 .name = "matroska,webm",
3975 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3976 .extensions = "mkv,mk3d,mka,mks",
3977 .priv_data_size = sizeof(MatroskaDemuxContext),
3978 .read_probe = matroska_probe,
3979 .read_header = matroska_read_header,
3980 .read_packet = matroska_read_packet,
3981 .read_close = matroska_read_close,
3982 .read_seek = matroska_read_seek,
3983 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3986 AVInputFormat ff_webm_dash_manifest_demuxer = {
3987 .name = "webm_dash_manifest",
3988 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3989 .priv_data_size = sizeof(MatroskaDemuxContext),
3990 .read_header = webm_dash_manifest_read_header,
3991 .read_packet = webm_dash_manifest_read_packet,
3992 .read_close = matroska_read_close,
3993 .priv_class = &webm_dash_class,