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"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
88 typedef const struct EbmlSyntax {
98 const struct EbmlSyntax *n;
102 typedef struct EbmlList {
107 typedef struct EbmlBin {
114 typedef struct Ebml {
119 uint64_t doctype_version;
122 typedef struct MatroskaTrackCompression {
125 } MatroskaTrackCompression;
127 typedef struct MatroskaTrackEncryption {
130 } MatroskaTrackEncryption;
132 typedef struct MatroskaTrackEncoding {
135 MatroskaTrackCompression compression;
136 MatroskaTrackEncryption encryption;
137 } MatroskaTrackEncoding;
139 typedef struct MatroskaMasteringMeta {
148 double max_luminance;
149 double min_luminance;
150 } MatroskaMasteringMeta;
152 typedef struct MatroskaTrackVideoColor {
153 uint64_t matrix_coefficients;
154 uint64_t bits_per_channel;
155 uint64_t chroma_sub_horz;
156 uint64_t chroma_sub_vert;
157 uint64_t cb_sub_horz;
158 uint64_t cb_sub_vert;
159 uint64_t chroma_siting_horz;
160 uint64_t chroma_siting_vert;
162 uint64_t transfer_characteristics;
166 MatroskaMasteringMeta mastering_meta;
167 } MatroskaTrackVideoColor;
169 typedef struct MatroskaTrackVideoProjection {
175 } MatroskaTrackVideoProjection;
177 typedef struct MatroskaTrackVideo {
179 uint64_t display_width;
180 uint64_t display_height;
181 uint64_t pixel_width;
182 uint64_t pixel_height;
184 uint64_t display_unit;
186 uint64_t field_order;
187 uint64_t stereo_mode;
190 MatroskaTrackVideoProjection projection;
191 } MatroskaTrackVideo;
193 typedef struct MatroskaTrackAudio {
195 double out_samplerate;
199 /* real audio header (extracted from extradata) */
206 uint64_t buf_timecode;
208 } MatroskaTrackAudio;
210 typedef struct MatroskaTrackPlane {
213 } MatroskaTrackPlane;
215 typedef struct MatroskaTrackOperation {
216 EbmlList combine_planes;
217 } MatroskaTrackOperation;
219 typedef struct MatroskaTrack {
228 uint64_t default_duration;
229 uint64_t flag_default;
230 uint64_t flag_forced;
231 uint64_t seek_preroll;
232 MatroskaTrackVideo video;
233 MatroskaTrackAudio audio;
234 MatroskaTrackOperation operation;
236 uint64_t codec_delay;
237 uint64_t codec_delay_in_track_tb;
240 int64_t end_timecode;
242 uint64_t max_block_additional_id;
244 uint32_t palette[AVPALETTE_COUNT];
248 typedef struct MatroskaAttachment {
255 } MatroskaAttachment;
257 typedef struct MatroskaChapter {
266 typedef struct MatroskaIndexPos {
271 typedef struct MatroskaIndex {
276 typedef struct MatroskaTag {
284 typedef struct MatroskaTagTarget {
292 typedef struct MatroskaTags {
293 MatroskaTagTarget target;
297 typedef struct MatroskaSeekhead {
302 typedef struct MatroskaLevel {
307 typedef struct MatroskaCluster {
312 typedef struct MatroskaLevel1Element {
316 } MatroskaLevel1Element;
318 typedef struct MatroskaDemuxContext {
319 const AVClass *class;
320 AVFormatContext *ctx;
324 MatroskaLevel levels[EBML_MAX_DEPTH];
334 EbmlList attachments;
340 /* byte position of the segment inside the stream */
341 int64_t segment_start;
343 /* the packet queue */
345 AVPacketList *queue_end;
349 /* What to skip before effectively reading a packet. */
350 int skip_to_keyframe;
351 uint64_t skip_to_timecode;
353 /* File has a CUES element, but we defer parsing until it is needed. */
354 int cues_parsing_deferred;
356 /* Level1 elements and whether they were read yet */
357 MatroskaLevel1Element level1_elems[64];
358 int num_level1_elems;
360 int current_cluster_num_blocks;
361 int64_t current_cluster_pos;
362 MatroskaCluster current_cluster;
364 /* File has SSA subtitles which prevent incremental cluster parsing. */
367 /* WebM DASH Manifest live flag */
370 /* Bandwidth value for WebM DASH Manifest */
372 } MatroskaDemuxContext;
374 typedef struct MatroskaBlock {
379 uint64_t additional_id;
381 int64_t discard_padding;
384 static const EbmlSyntax ebml_header[] = {
385 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
386 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
387 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
388 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
389 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
390 { EBML_ID_EBMLVERSION, EBML_NONE },
391 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
395 static const EbmlSyntax ebml_syntax[] = {
396 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
400 static const EbmlSyntax matroska_info[] = {
401 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
402 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
403 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
404 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
405 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
406 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
407 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
411 static const EbmlSyntax matroska_mastering_meta[] = {
412 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
419 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
420 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
421 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
425 static const EbmlSyntax matroska_track_video_color[] = {
426 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
427 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
430 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
431 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
432 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
433 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
434 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
435 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
436 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
437 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
438 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
439 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
443 static const EbmlSyntax matroska_track_video_projection[] = {
444 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
445 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
446 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
447 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
448 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
452 static const EbmlSyntax matroska_track_video[] = {
453 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
454 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
455 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
456 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
457 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
458 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
459 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
460 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
461 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
462 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
463 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
464 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
465 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
466 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
467 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
468 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
469 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
470 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
474 static const EbmlSyntax matroska_track_audio[] = {
475 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
476 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
477 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
478 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
482 static const EbmlSyntax matroska_track_encoding_compression[] = {
483 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
484 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
488 static const EbmlSyntax matroska_track_encoding_encryption[] = {
489 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
490 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
491 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
493 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
494 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
495 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
498 static const EbmlSyntax matroska_track_encoding[] = {
499 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
500 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
501 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
502 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
503 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
507 static const EbmlSyntax matroska_track_encodings[] = {
508 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
512 static const EbmlSyntax matroska_track_plane[] = {
513 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
514 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
518 static const EbmlSyntax matroska_track_combine_planes[] = {
519 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
523 static const EbmlSyntax matroska_track_operation[] = {
524 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
528 static const EbmlSyntax matroska_track[] = {
529 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
530 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
531 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
532 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
533 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
534 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
535 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
536 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
537 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
538 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
539 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
540 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
541 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
542 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
543 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
544 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
545 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
546 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
547 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
548 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
549 { MATROSKA_ID_CODECNAME, EBML_NONE },
550 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
551 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
552 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
553 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
554 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
558 static const EbmlSyntax matroska_tracks[] = {
559 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
563 static const EbmlSyntax matroska_attachment[] = {
564 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
565 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
566 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
567 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
568 { MATROSKA_ID_FILEDESC, EBML_NONE },
572 static const EbmlSyntax matroska_attachments[] = {
573 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
577 static const EbmlSyntax matroska_chapter_display[] = {
578 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
579 { MATROSKA_ID_CHAPLANG, EBML_NONE },
580 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
584 static const EbmlSyntax matroska_chapter_entry[] = {
585 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
586 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
587 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
588 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
589 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
590 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
591 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
592 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
596 static const EbmlSyntax matroska_chapter[] = {
597 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
598 { MATROSKA_ID_EDITIONUID, EBML_NONE },
599 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
600 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
601 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
605 static const EbmlSyntax matroska_chapters[] = {
606 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
610 static const EbmlSyntax matroska_index_pos[] = {
611 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
612 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
613 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
614 { MATROSKA_ID_CUEDURATION, EBML_NONE },
615 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
619 static const EbmlSyntax matroska_index_entry[] = {
620 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
621 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
625 static const EbmlSyntax matroska_index[] = {
626 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
630 static const EbmlSyntax matroska_simpletag[] = {
631 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
632 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
633 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
634 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
635 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
636 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
640 static const EbmlSyntax matroska_tagtargets[] = {
641 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
642 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
643 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
644 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
645 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
649 static const EbmlSyntax matroska_tag[] = {
650 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
651 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
655 static const EbmlSyntax matroska_tags[] = {
656 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
660 static const EbmlSyntax matroska_seekhead_entry[] = {
661 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
662 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
666 static const EbmlSyntax matroska_seekhead[] = {
667 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
671 static const EbmlSyntax matroska_segment[] = {
672 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
673 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
674 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
675 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
676 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
677 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
678 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
679 { MATROSKA_ID_CLUSTER, EBML_STOP },
683 static const EbmlSyntax matroska_segments[] = {
684 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
688 static const EbmlSyntax matroska_blockmore[] = {
689 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
690 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
694 static const EbmlSyntax matroska_blockadditions[] = {
695 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
699 static const EbmlSyntax matroska_blockgroup[] = {
700 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
701 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
702 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
703 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
704 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
705 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
706 { MATROSKA_ID_CODECSTATE, EBML_NONE },
707 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
711 static const EbmlSyntax matroska_cluster[] = {
712 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
713 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
714 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
715 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
716 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
720 static const EbmlSyntax matroska_clusters[] = {
721 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
722 { MATROSKA_ID_INFO, EBML_NONE },
723 { MATROSKA_ID_CUES, EBML_NONE },
724 { MATROSKA_ID_TAGS, EBML_NONE },
725 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
729 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
730 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
731 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
732 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
733 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
734 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
735 { MATROSKA_ID_INFO, EBML_NONE },
736 { MATROSKA_ID_CUES, EBML_NONE },
737 { MATROSKA_ID_TAGS, EBML_NONE },
738 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
739 { MATROSKA_ID_CLUSTER, EBML_STOP },
743 static const EbmlSyntax matroska_cluster_incremental[] = {
744 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
745 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
746 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
747 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
748 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
752 static const EbmlSyntax matroska_clusters_incremental[] = {
753 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
754 { MATROSKA_ID_INFO, EBML_NONE },
755 { MATROSKA_ID_CUES, EBML_NONE },
756 { MATROSKA_ID_TAGS, EBML_NONE },
757 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
761 static const char *const matroska_doctypes[] = { "matroska", "webm" };
763 static int matroska_read_close(AVFormatContext *s);
765 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
767 AVIOContext *pb = matroska->ctx->pb;
770 matroska->current_id = 0;
771 matroska->num_levels = 0;
773 /* seek to next position to resync from */
774 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
781 // try to find a toplevel element
782 while (!avio_feof(pb)) {
783 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
784 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
785 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
786 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
787 matroska->current_id = id;
790 id = (id << 8) | avio_r8(pb);
798 * Return: Whether we reached the end of a level in the hierarchy or not.
800 static int ebml_level_end(MatroskaDemuxContext *matroska)
802 AVIOContext *pb = matroska->ctx->pb;
803 int64_t pos = avio_tell(pb);
805 if (matroska->num_levels > 0) {
806 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
807 if (pos - level->start >= level->length || matroska->current_id) {
808 matroska->num_levels--;
812 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
816 * Read: an "EBML number", which is defined as a variable-length
817 * array of bytes. The first byte indicates the length by giving a
818 * number of 0-bits followed by a one. The position of the first
819 * "one" bit inside the first byte indicates the length of this
821 * Returns: number of bytes read, < 0 on error
823 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
824 int max_size, uint64_t *number)
829 /* The first byte tells us the length in bytes - avio_r8() can normally
830 * return 0, but since that's not a valid first ebmlID byte, we can
831 * use it safely here to catch EOS. */
832 if (!(total = avio_r8(pb))) {
833 /* we might encounter EOS here */
834 if (!avio_feof(pb)) {
835 int64_t pos = avio_tell(pb);
836 av_log(matroska->ctx, AV_LOG_ERROR,
837 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
839 return pb->error ? pb->error : AVERROR(EIO);
844 /* get the length of the EBML number */
845 read = 8 - ff_log2_tab[total];
846 if (read > max_size) {
847 int64_t pos = avio_tell(pb) - 1;
848 av_log(matroska->ctx, AV_LOG_ERROR,
849 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
850 (uint8_t) total, pos, pos);
851 return AVERROR_INVALIDDATA;
854 /* read out length */
855 total ^= 1 << ff_log2_tab[total];
857 total = (total << 8) | avio_r8(pb);
865 * Read a EBML length value.
866 * This needs special handling for the "unknown length" case which has multiple
869 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
872 int res = ebml_read_num(matroska, pb, 8, number);
873 if (res > 0 && *number + 1 == 1ULL << (7 * res))
874 *number = EBML_UNKNOWN_LENGTH;
879 * Read the next element as an unsigned int.
880 * 0 is success, < 0 is failure.
882 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
887 return AVERROR_INVALIDDATA;
889 /* big-endian ordering; build up number */
892 *num = (*num << 8) | avio_r8(pb);
898 * Read the next element as a signed int.
899 * 0 is success, < 0 is failure.
901 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
906 return AVERROR_INVALIDDATA;
911 *num = sign_extend(avio_r8(pb), 8);
913 /* big-endian ordering; build up number */
915 *num = ((uint64_t)*num << 8) | avio_r8(pb);
922 * Read the next element as a float.
923 * 0 is success, < 0 is failure.
925 static int ebml_read_float(AVIOContext *pb, int size, double *num)
930 *num = av_int2float(avio_rb32(pb));
932 *num = av_int2double(avio_rb64(pb));
934 return AVERROR_INVALIDDATA;
940 * Read the next element as an ASCII string.
941 * 0 is success, < 0 is failure.
943 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
947 /* EBML strings are usually not 0-terminated, so we allocate one
948 * byte more, read the string and NULL-terminate it ourselves. */
949 if (!(res = av_malloc(size + 1)))
950 return AVERROR(ENOMEM);
951 if (avio_read(pb, (uint8_t *) res, size) != size) {
963 * Read the next element as binary data.
964 * 0 is success, < 0 is failure.
966 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
970 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
973 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
975 bin->data = bin->buf->data;
977 bin->pos = avio_tell(pb);
978 if (avio_read(pb, bin->data, length) != length) {
979 av_buffer_unref(&bin->buf);
989 * Read the next element, but only the header. The contents
990 * are supposed to be sub-elements which can be read separately.
991 * 0 is success, < 0 is failure.
993 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
995 AVIOContext *pb = matroska->ctx->pb;
996 MatroskaLevel *level;
998 if (matroska->num_levels >= EBML_MAX_DEPTH) {
999 av_log(matroska->ctx, AV_LOG_ERROR,
1000 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1001 return AVERROR(ENOSYS);
1004 level = &matroska->levels[matroska->num_levels++];
1005 level->start = avio_tell(pb);
1006 level->length = length;
1012 * Read signed/unsigned "EBML" numbers.
1013 * Return: number of bytes processed, < 0 on error
1015 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1016 uint8_t *data, uint32_t size, uint64_t *num)
1019 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1020 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1024 * Same as above, but signed.
1026 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1027 uint8_t *data, uint32_t size, int64_t *num)
1032 /* read as unsigned number first */
1033 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1036 /* make signed (weird way) */
1037 *num = unum - ((1LL << (7 * res - 1)) - 1);
1042 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1043 EbmlSyntax *syntax, void *data);
1045 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1046 uint32_t id, void *data)
1049 for (i = 0; syntax[i].id; i++)
1050 if (id == syntax[i].id)
1052 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1053 matroska->num_levels > 0 &&
1054 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1055 return 0; // we reached the end of an unknown size cluster
1056 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1057 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1059 return ebml_parse_elem(matroska, &syntax[i], data);
1062 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1065 if (!matroska->current_id) {
1067 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1069 // in live mode, finish parsing if EOF is reached.
1070 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1071 res == AVERROR_EOF) ? 1 : res;
1073 matroska->current_id = id | 1 << 7 * res;
1075 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1078 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1083 for (i = 0; syntax[i].id; i++)
1084 switch (syntax[i].type) {
1086 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1089 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1092 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1096 // the default may be NULL
1097 if (syntax[i].def.s) {
1098 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1099 *dst = av_strdup(syntax[i].def.s);
1101 return AVERROR(ENOMEM);
1106 while (!res && !ebml_level_end(matroska))
1107 res = ebml_parse(matroska, syntax, data);
1112 static int is_ebml_id_valid(uint32_t id)
1114 // Due to endian nonsense in Matroska, the highest byte with any bits set
1115 // will contain the leading length bit. This bit in turn identifies the
1116 // total byte length of the element by its position within the byte.
1117 unsigned int bits = av_log2(id);
1118 return id && (bits + 7) / 8 == (8 - bits % 8);
1122 * Allocate and return the entry for the level1 element with the given ID. If
1123 * an entry already exists, return the existing entry.
1125 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1129 MatroskaLevel1Element *elem;
1131 if (!is_ebml_id_valid(id))
1134 // Some files link to all clusters; useless.
1135 if (id == MATROSKA_ID_CLUSTER)
1138 // There can be multiple seekheads.
1139 if (id != MATROSKA_ID_SEEKHEAD) {
1140 for (i = 0; i < matroska->num_level1_elems; i++) {
1141 if (matroska->level1_elems[i].id == id)
1142 return &matroska->level1_elems[i];
1146 // Only a completely broken file would have more elements.
1147 // It also provides a low-effort way to escape from circular seekheads
1148 // (every iteration will add a level1 entry).
1149 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1150 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1154 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1155 *elem = (MatroskaLevel1Element){.id = id};
1160 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1161 EbmlSyntax *syntax, void *data)
1163 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1166 // max. 16 MB for strings
1167 [EBML_STR] = 0x1000000,
1168 [EBML_UTF8] = 0x1000000,
1169 // max. 256 MB for binary data
1170 [EBML_BIN] = 0x10000000,
1171 // no limits for anything else
1173 AVIOContext *pb = matroska->ctx->pb;
1174 uint32_t id = syntax->id;
1178 MatroskaLevel1Element *level1_elem;
1180 data = (char *) data + syntax->data_offset;
1181 if (syntax->list_elem_size) {
1182 EbmlList *list = data;
1183 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1185 return AVERROR(ENOMEM);
1186 list->elem = newelem;
1187 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1188 memset(data, 0, syntax->list_elem_size);
1192 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1193 matroska->current_id = 0;
1194 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1196 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1197 av_log(matroska->ctx, AV_LOG_ERROR,
1198 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1199 length, max_lengths[syntax->type], syntax->type);
1200 return AVERROR_INVALIDDATA;
1202 if (matroska->num_levels > 0) {
1203 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1204 AVIOContext *pb = matroska->ctx->pb;
1205 int64_t pos = avio_tell(pb);
1207 if (length != EBML_UNKNOWN_LENGTH &&
1208 level->length != EBML_UNKNOWN_LENGTH) {
1209 uint64_t elem_end = pos + length,
1210 level_end = level->start + level->length;
1212 if (level_end < elem_end) {
1213 av_log(matroska->ctx, AV_LOG_ERROR,
1214 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1215 "containing master element ending at 0x%"PRIx64"\n",
1216 pos, elem_end, level_end);
1217 return AVERROR_INVALIDDATA;
1219 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1220 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1221 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1222 return AVERROR_INVALIDDATA;
1223 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1224 // According to the specifications only clusters and segments
1225 // are allowed to be unknown-sized.
1226 av_log(matroska->ctx, AV_LOG_ERROR,
1227 "Found unknown-sized element other than a cluster at "
1228 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1229 return AVERROR_INVALIDDATA;
1234 switch (syntax->type) {
1236 res = ebml_read_uint(pb, length, data);
1239 res = ebml_read_sint(pb, length, data);
1242 res = ebml_read_float(pb, length, data);
1246 res = ebml_read_ascii(pb, length, data);
1249 res = ebml_read_binary(pb, length, data);
1253 if ((res = ebml_read_master(matroska, length)) < 0)
1255 if (id == MATROSKA_ID_SEGMENT)
1256 matroska->segment_start = avio_tell(matroska->ctx->pb);
1257 if (id == MATROSKA_ID_CUES)
1258 matroska->cues_parsing_deferred = 0;
1259 if (syntax->type == EBML_LEVEL1 &&
1260 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1261 if (level1_elem->parsed)
1262 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1263 level1_elem->parsed = 1;
1265 return ebml_parse_nest(matroska, syntax->def.n, data);
1267 return ebml_parse_id(matroska, syntax->def.n, id, data);
1271 if (ffio_limit(pb, length) != length)
1272 return AVERROR(EIO);
1273 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1275 if (res == AVERROR_INVALIDDATA)
1276 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1277 else if (res == AVERROR(EIO))
1278 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1282 static void ebml_free(EbmlSyntax *syntax, void *data)
1285 for (i = 0; syntax[i].id; i++) {
1286 void *data_off = (char *) data + syntax[i].data_offset;
1287 switch (syntax[i].type) {
1293 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1297 if (syntax[i].list_elem_size) {
1298 EbmlList *list = data_off;
1299 char *ptr = list->elem;
1300 for (j = 0; j < list->nb_elem;
1301 j++, ptr += syntax[i].list_elem_size)
1302 ebml_free(syntax[i].def.n, ptr);
1303 av_freep(&list->elem);
1306 ebml_free(syntax[i].def.n, data_off);
1316 static int matroska_probe(const AVProbeData *p)
1319 int len_mask = 0x80, size = 1, n = 1, i;
1322 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1325 /* length of header */
1327 while (size <= 8 && !(total & len_mask)) {
1333 total &= (len_mask - 1);
1335 total = (total << 8) | p->buf[4 + n++];
1337 /* Does the probe data contain the whole header? */
1338 if (p->buf_size < 4 + size + total)
1341 /* The header should contain a known document type. For now,
1342 * we don't parse the whole header but simply check for the
1343 * availability of that array of characters inside the header.
1344 * Not fully fool-proof, but good enough. */
1345 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1346 size_t probelen = strlen(matroska_doctypes[i]);
1347 if (total < probelen)
1349 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1350 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1351 return AVPROBE_SCORE_MAX;
1354 // probably valid EBML header but no recognized doctype
1355 return AVPROBE_SCORE_EXTENSION;
1358 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1361 MatroskaTrack *tracks = matroska->tracks.elem;
1364 for (i = 0; i < matroska->tracks.nb_elem; i++)
1365 if (tracks[i].num == num)
1368 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1372 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1373 MatroskaTrack *track)
1375 MatroskaTrackEncoding *encodings = track->encodings.elem;
1376 uint8_t *data = *buf;
1377 int isize = *buf_size;
1378 uint8_t *pkt_data = NULL;
1379 uint8_t av_unused *newpktdata;
1380 int pkt_size = isize;
1384 if (pkt_size >= 10000000U)
1385 return AVERROR_INVALIDDATA;
1387 switch (encodings[0].compression.algo) {
1388 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1390 int header_size = encodings[0].compression.settings.size;
1391 uint8_t *header = encodings[0].compression.settings.data;
1393 if (header_size && !header) {
1394 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1401 pkt_size = isize + header_size;
1402 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1404 return AVERROR(ENOMEM);
1406 memcpy(pkt_data, header, header_size);
1407 memcpy(pkt_data + header_size, data, isize);
1411 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1413 olen = pkt_size *= 3;
1414 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1415 + AV_INPUT_BUFFER_PADDING_SIZE);
1417 result = AVERROR(ENOMEM);
1420 pkt_data = newpktdata;
1421 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1422 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1424 result = AVERROR_INVALIDDATA;
1431 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1433 z_stream zstream = { 0 };
1434 if (inflateInit(&zstream) != Z_OK)
1436 zstream.next_in = data;
1437 zstream.avail_in = isize;
1440 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1442 inflateEnd(&zstream);
1443 result = AVERROR(ENOMEM);
1446 pkt_data = newpktdata;
1447 zstream.avail_out = pkt_size - zstream.total_out;
1448 zstream.next_out = pkt_data + zstream.total_out;
1449 result = inflate(&zstream, Z_NO_FLUSH);
1450 } while (result == Z_OK && pkt_size < 10000000);
1451 pkt_size = zstream.total_out;
1452 inflateEnd(&zstream);
1453 if (result != Z_STREAM_END) {
1454 if (result == Z_MEM_ERROR)
1455 result = AVERROR(ENOMEM);
1457 result = AVERROR_INVALIDDATA;
1464 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1466 bz_stream bzstream = { 0 };
1467 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1469 bzstream.next_in = data;
1470 bzstream.avail_in = isize;
1473 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1475 BZ2_bzDecompressEnd(&bzstream);
1476 result = AVERROR(ENOMEM);
1479 pkt_data = newpktdata;
1480 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1481 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1482 result = BZ2_bzDecompress(&bzstream);
1483 } while (result == BZ_OK && pkt_size < 10000000);
1484 pkt_size = bzstream.total_out_lo32;
1485 BZ2_bzDecompressEnd(&bzstream);
1486 if (result != BZ_STREAM_END) {
1487 if (result == BZ_MEM_ERROR)
1488 result = AVERROR(ENOMEM);
1490 result = AVERROR_INVALIDDATA;
1497 return AVERROR_INVALIDDATA;
1500 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1503 *buf_size = pkt_size;
1511 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1512 AVDictionary **metadata, char *prefix)
1514 MatroskaTag *tags = list->elem;
1518 for (i = 0; i < list->nb_elem; i++) {
1519 const char *lang = tags[i].lang &&
1520 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1522 if (!tags[i].name) {
1523 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1527 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1529 av_strlcpy(key, tags[i].name, sizeof(key));
1530 if (tags[i].def || !lang) {
1531 av_dict_set(metadata, key, tags[i].string, 0);
1532 if (tags[i].sub.nb_elem)
1533 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1536 av_strlcat(key, "-", sizeof(key));
1537 av_strlcat(key, lang, sizeof(key));
1538 av_dict_set(metadata, key, tags[i].string, 0);
1539 if (tags[i].sub.nb_elem)
1540 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1543 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1546 static void matroska_convert_tags(AVFormatContext *s)
1548 MatroskaDemuxContext *matroska = s->priv_data;
1549 MatroskaTags *tags = matroska->tags.elem;
1552 for (i = 0; i < matroska->tags.nb_elem; i++) {
1553 if (tags[i].target.attachuid) {
1554 MatroskaAttachment *attachment = matroska->attachments.elem;
1556 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1557 if (attachment[j].uid == tags[i].target.attachuid &&
1558 attachment[j].stream) {
1559 matroska_convert_tag(s, &tags[i].tag,
1560 &attachment[j].stream->metadata, NULL);
1565 av_log(NULL, AV_LOG_WARNING,
1566 "The tags at index %d refer to a "
1567 "non-existent attachment %"PRId64".\n",
1568 i, tags[i].target.attachuid);
1570 } else if (tags[i].target.chapteruid) {
1571 MatroskaChapter *chapter = matroska->chapters.elem;
1573 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1574 if (chapter[j].uid == tags[i].target.chapteruid &&
1575 chapter[j].chapter) {
1576 matroska_convert_tag(s, &tags[i].tag,
1577 &chapter[j].chapter->metadata, NULL);
1582 av_log(NULL, AV_LOG_WARNING,
1583 "The tags at index %d refer to a non-existent chapter "
1585 i, tags[i].target.chapteruid);
1587 } else if (tags[i].target.trackuid) {
1588 MatroskaTrack *track = matroska->tracks.elem;
1590 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1591 if (track[j].uid == tags[i].target.trackuid &&
1593 matroska_convert_tag(s, &tags[i].tag,
1594 &track[j].stream->metadata, NULL);
1599 av_log(NULL, AV_LOG_WARNING,
1600 "The tags at index %d refer to a non-existent track "
1602 i, tags[i].target.trackuid);
1605 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1606 tags[i].target.type);
1611 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1614 uint32_t level_up = matroska->level_up;
1615 uint32_t saved_id = matroska->current_id;
1616 int64_t before_pos = avio_tell(matroska->ctx->pb);
1617 MatroskaLevel level;
1622 offset = pos + matroska->segment_start;
1623 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1624 /* We don't want to lose our seekhead level, so we add
1625 * a dummy. This is a crude hack. */
1626 if (matroska->num_levels == EBML_MAX_DEPTH) {
1627 av_log(matroska->ctx, AV_LOG_INFO,
1628 "Max EBML element depth (%d) reached, "
1629 "cannot parse further.\n", EBML_MAX_DEPTH);
1630 ret = AVERROR_INVALIDDATA;
1633 level.length = EBML_UNKNOWN_LENGTH;
1634 matroska->levels[matroska->num_levels] = level;
1635 matroska->num_levels++;
1636 matroska->current_id = 0;
1638 ret = ebml_parse(matroska, matroska_segment, matroska);
1640 /* remove dummy level */
1641 while (matroska->num_levels) {
1642 uint64_t length = matroska->levels[--matroska->num_levels].length;
1643 if (length == EBML_UNKNOWN_LENGTH)
1649 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1650 matroska->level_up = level_up;
1651 matroska->current_id = saved_id;
1656 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1658 EbmlList *seekhead_list = &matroska->seekhead;
1661 // we should not do any seeking in the streaming case
1662 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1665 for (i = 0; i < seekhead_list->nb_elem; i++) {
1666 MatroskaSeekhead *seekheads = seekhead_list->elem;
1667 uint32_t id = seekheads[i].id;
1668 uint64_t pos = seekheads[i].pos;
1670 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1671 if (!elem || elem->parsed)
1676 // defer cues parsing until we actually need cue data.
1677 if (id == MATROSKA_ID_CUES)
1680 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1681 // mark index as broken
1682 matroska->cues_parsing_deferred = -1;
1690 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1692 EbmlList *index_list;
1693 MatroskaIndex *index;
1694 uint64_t index_scale = 1;
1697 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1700 index_list = &matroska->index;
1701 index = index_list->elem;
1702 if (index_list->nb_elem < 2)
1704 if (index[1].time > 1E14 / matroska->time_scale) {
1705 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1708 for (i = 0; i < index_list->nb_elem; i++) {
1709 EbmlList *pos_list = &index[i].pos;
1710 MatroskaIndexPos *pos = pos_list->elem;
1711 for (j = 0; j < pos_list->nb_elem; j++) {
1712 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1714 if (track && track->stream)
1715 av_add_index_entry(track->stream,
1716 pos[j].pos + matroska->segment_start,
1717 index[i].time / index_scale, 0, 0,
1723 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1726 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1729 for (i = 0; i < matroska->num_level1_elems; i++) {
1730 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1731 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1732 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1733 matroska->cues_parsing_deferred = -1;
1739 matroska_add_index_entries(matroska);
1742 static int matroska_aac_profile(char *codec_id)
1744 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1747 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1748 if (strstr(codec_id, aac_profiles[profile]))
1753 static int matroska_aac_sri(int samplerate)
1757 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1758 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1763 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1765 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1766 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1769 static int matroska_parse_flac(AVFormatContext *s,
1770 MatroskaTrack *track,
1773 AVStream *st = track->stream;
1774 uint8_t *p = track->codec_priv.data;
1775 int size = track->codec_priv.size;
1777 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1778 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1779 track->codec_priv.size = 0;
1783 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1785 p += track->codec_priv.size;
1786 size -= track->codec_priv.size;
1788 /* parse the remaining metadata blocks if present */
1790 int block_last, block_type, block_size;
1792 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1796 if (block_size > size)
1799 /* check for the channel mask */
1800 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1801 AVDictionary *dict = NULL;
1802 AVDictionaryEntry *chmask;
1804 ff_vorbis_comment(s, &dict, p, block_size, 0);
1805 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1807 uint64_t mask = strtol(chmask->value, NULL, 0);
1808 if (!mask || mask & ~0x3ffffULL) {
1809 av_log(s, AV_LOG_WARNING,
1810 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1812 st->codecpar->channel_layout = mask;
1814 av_dict_free(&dict);
1824 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1826 int major, minor, micro, bttb = 0;
1828 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1829 * this function, and fixed in 57.52 */
1830 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1831 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1833 switch (field_order) {
1834 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1835 return AV_FIELD_PROGRESSIVE;
1836 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1837 return AV_FIELD_UNKNOWN;
1838 case MATROSKA_VIDEO_FIELDORDER_TT:
1840 case MATROSKA_VIDEO_FIELDORDER_BB:
1842 case MATROSKA_VIDEO_FIELDORDER_BT:
1843 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1844 case MATROSKA_VIDEO_FIELDORDER_TB:
1845 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1847 return AV_FIELD_UNKNOWN;
1851 static void mkv_stereo_mode_display_mul(int stereo_mode,
1852 int *h_width, int *h_height)
1854 switch (stereo_mode) {
1855 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1856 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1857 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1858 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1859 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1861 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1862 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1863 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1864 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1867 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1868 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1869 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1870 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1876 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1877 const MatroskaTrackVideoColor *color = track->video.color.elem;
1878 const MatroskaMasteringMeta *mastering_meta;
1879 int has_mastering_primaries, has_mastering_luminance;
1881 if (!track->video.color.nb_elem)
1884 mastering_meta = &color->mastering_meta;
1885 // Mastering primaries are CIE 1931 coords, and must be > 0.
1886 has_mastering_primaries =
1887 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1888 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1889 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1890 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1891 has_mastering_luminance = mastering_meta->max_luminance > 0;
1893 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1894 st->codecpar->color_space = color->matrix_coefficients;
1895 if (color->primaries != AVCOL_PRI_RESERVED &&
1896 color->primaries != AVCOL_PRI_RESERVED0)
1897 st->codecpar->color_primaries = color->primaries;
1898 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1899 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1900 st->codecpar->color_trc = color->transfer_characteristics;
1901 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1902 color->range <= AVCOL_RANGE_JPEG)
1903 st->codecpar->color_range = color->range;
1904 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1905 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1906 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1907 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1908 st->codecpar->chroma_location =
1909 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1910 (color->chroma_siting_vert - 1) << 7);
1912 if (color->max_cll && color->max_fall) {
1915 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1917 return AVERROR(ENOMEM);
1918 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1919 (uint8_t *)metadata, size);
1921 av_freep(&metadata);
1924 metadata->MaxCLL = color->max_cll;
1925 metadata->MaxFALL = color->max_fall;
1928 if (has_mastering_primaries || has_mastering_luminance) {
1929 // Use similar rationals as other standards.
1930 const int chroma_den = 50000;
1931 const int luma_den = 10000;
1932 AVMasteringDisplayMetadata *metadata =
1933 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1934 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1935 sizeof(AVMasteringDisplayMetadata));
1937 return AVERROR(ENOMEM);
1939 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1940 if (has_mastering_primaries) {
1941 metadata->display_primaries[0][0] = av_make_q(
1942 round(mastering_meta->r_x * chroma_den), chroma_den);
1943 metadata->display_primaries[0][1] = av_make_q(
1944 round(mastering_meta->r_y * chroma_den), chroma_den);
1945 metadata->display_primaries[1][0] = av_make_q(
1946 round(mastering_meta->g_x * chroma_den), chroma_den);
1947 metadata->display_primaries[1][1] = av_make_q(
1948 round(mastering_meta->g_y * chroma_den), chroma_den);
1949 metadata->display_primaries[2][0] = av_make_q(
1950 round(mastering_meta->b_x * chroma_den), chroma_den);
1951 metadata->display_primaries[2][1] = av_make_q(
1952 round(mastering_meta->b_y * chroma_den), chroma_den);
1953 metadata->white_point[0] = av_make_q(
1954 round(mastering_meta->white_x * chroma_den), chroma_den);
1955 metadata->white_point[1] = av_make_q(
1956 round(mastering_meta->white_y * chroma_den), chroma_den);
1957 metadata->has_primaries = 1;
1959 if (has_mastering_luminance) {
1960 metadata->max_luminance = av_make_q(
1961 round(mastering_meta->max_luminance * luma_den), luma_den);
1962 metadata->min_luminance = av_make_q(
1963 round(mastering_meta->min_luminance * luma_den), luma_den);
1964 metadata->has_luminance = 1;
1970 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1971 AVSphericalMapping *spherical;
1972 enum AVSphericalProjection projection;
1973 size_t spherical_size;
1974 uint32_t l = 0, t = 0, r = 0, b = 0;
1975 uint32_t padding = 0;
1979 bytestream2_init(&gb, track->video.projection.private.data,
1980 track->video.projection.private.size);
1982 if (bytestream2_get_byte(&gb) != 0) {
1983 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1987 bytestream2_skip(&gb, 3); // flags
1989 switch (track->video.projection.type) {
1990 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1991 if (track->video.projection.private.size == 20) {
1992 t = bytestream2_get_be32(&gb);
1993 b = bytestream2_get_be32(&gb);
1994 l = bytestream2_get_be32(&gb);
1995 r = bytestream2_get_be32(&gb);
1997 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1998 av_log(NULL, AV_LOG_ERROR,
1999 "Invalid bounding rectangle coordinates "
2000 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2002 return AVERROR_INVALIDDATA;
2004 } else if (track->video.projection.private.size != 0) {
2005 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2006 return AVERROR_INVALIDDATA;
2009 if (l || t || r || b)
2010 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2012 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2014 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2015 if (track->video.projection.private.size < 4) {
2016 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2017 return AVERROR_INVALIDDATA;
2018 } else if (track->video.projection.private.size == 12) {
2019 uint32_t layout = bytestream2_get_be32(&gb);
2021 av_log(NULL, AV_LOG_WARNING,
2022 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2025 projection = AV_SPHERICAL_CUBEMAP;
2026 padding = bytestream2_get_be32(&gb);
2028 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2029 return AVERROR_INVALIDDATA;
2032 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2033 /* No Spherical metadata */
2036 av_log(NULL, AV_LOG_WARNING,
2037 "Unknown spherical metadata type %"PRIu64"\n",
2038 track->video.projection.type);
2042 spherical = av_spherical_alloc(&spherical_size);
2044 return AVERROR(ENOMEM);
2046 spherical->projection = projection;
2048 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2049 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2050 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2052 spherical->padding = padding;
2054 spherical->bound_left = l;
2055 spherical->bound_top = t;
2056 spherical->bound_right = r;
2057 spherical->bound_bottom = b;
2059 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2062 av_freep(&spherical);
2069 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2071 const AVCodecTag *codec_tags;
2073 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2074 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2076 /* Normalize noncompliant private data that starts with the fourcc
2077 * by expanding/shifting the data by 4 bytes and storing the data
2078 * size at the start. */
2079 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2080 int ret = av_buffer_realloc(&track->codec_priv.buf,
2081 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2085 track->codec_priv.data = track->codec_priv.buf->data;
2086 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2087 track->codec_priv.size += 4;
2088 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2091 *fourcc = AV_RL32(track->codec_priv.data + 4);
2092 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2097 static int matroska_parse_tracks(AVFormatContext *s)
2099 MatroskaDemuxContext *matroska = s->priv_data;
2100 MatroskaTrack *tracks = matroska->tracks.elem;
2105 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2106 MatroskaTrack *track = &tracks[i];
2107 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2108 EbmlList *encodings_list = &track->encodings;
2109 MatroskaTrackEncoding *encodings = encodings_list->elem;
2110 uint8_t *extradata = NULL;
2111 int extradata_size = 0;
2112 int extradata_offset = 0;
2113 uint32_t fourcc = 0;
2115 char* key_id_base64 = NULL;
2118 /* Apply some sanity checks. */
2119 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2120 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2121 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2122 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2123 av_log(matroska->ctx, AV_LOG_INFO,
2124 "Unknown or unsupported track type %"PRIu64"\n",
2128 if (!track->codec_id)
2131 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2132 isnan(track->audio.samplerate)) {
2133 av_log(matroska->ctx, AV_LOG_WARNING,
2134 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2135 track->audio.samplerate);
2136 track->audio.samplerate = 8000;
2139 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2140 if (!track->default_duration && track->video.frame_rate > 0) {
2141 double default_duration = 1000000000 / track->video.frame_rate;
2142 if (default_duration > UINT64_MAX || default_duration < 0) {
2143 av_log(matroska->ctx, AV_LOG_WARNING,
2144 "Invalid frame rate %e. Cannot calculate default duration.\n",
2145 track->video.frame_rate);
2147 track->default_duration = default_duration;
2150 if (track->video.display_width == -1)
2151 track->video.display_width = track->video.pixel_width;
2152 if (track->video.display_height == -1)
2153 track->video.display_height = track->video.pixel_height;
2154 if (track->video.color_space.size == 4)
2155 fourcc = AV_RL32(track->video.color_space.data);
2156 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2157 if (!track->audio.out_samplerate)
2158 track->audio.out_samplerate = track->audio.samplerate;
2160 if (encodings_list->nb_elem > 1) {
2161 av_log(matroska->ctx, AV_LOG_ERROR,
2162 "Multiple combined encodings not supported");
2163 } else if (encodings_list->nb_elem == 1) {
2164 if (encodings[0].type) {
2165 if (encodings[0].encryption.key_id.size > 0) {
2166 /* Save the encryption key id to be stored later as a
2168 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2169 key_id_base64 = av_malloc(b64_size);
2170 if (key_id_base64 == NULL)
2171 return AVERROR(ENOMEM);
2173 av_base64_encode(key_id_base64, b64_size,
2174 encodings[0].encryption.key_id.data,
2175 encodings[0].encryption.key_id.size);
2177 encodings[0].scope = 0;
2178 av_log(matroska->ctx, AV_LOG_ERROR,
2179 "Unsupported encoding type");
2183 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2186 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2189 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2191 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2192 encodings[0].scope = 0;
2193 av_log(matroska->ctx, AV_LOG_ERROR,
2194 "Unsupported encoding type");
2195 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2196 uint8_t *codec_priv = track->codec_priv.data;
2197 int ret = matroska_decode_buffer(&track->codec_priv.data,
2198 &track->codec_priv.size,
2201 track->codec_priv.data = NULL;
2202 track->codec_priv.size = 0;
2203 av_log(matroska->ctx, AV_LOG_ERROR,
2204 "Failed to decode codec private data\n");
2207 if (codec_priv != track->codec_priv.data) {
2208 av_buffer_unref(&track->codec_priv.buf);
2209 if (track->codec_priv.data) {
2210 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2211 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2213 if (!track->codec_priv.buf) {
2214 av_freep(&track->codec_priv.data);
2215 track->codec_priv.size = 0;
2216 return AVERROR(ENOMEM);
2223 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2224 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2225 strlen(ff_mkv_codec_tags[j].str))) {
2226 codec_id = ff_mkv_codec_tags[j].id;
2231 st = track->stream = avformat_new_stream(s, NULL);
2233 av_free(key_id_base64);
2234 return AVERROR(ENOMEM);
2237 if (key_id_base64) {
2238 /* export encryption key id as base64 metadata tag */
2239 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2240 av_freep(&key_id_base64);
2243 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2244 track->codec_priv.size >= 40 &&
2245 track->codec_priv.data) {
2246 track->ms_compat = 1;
2247 bit_depth = AV_RL16(track->codec_priv.data + 14);
2248 fourcc = AV_RL32(track->codec_priv.data + 16);
2249 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2252 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2254 extradata_offset = 40;
2255 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2256 track->codec_priv.size >= 14 &&
2257 track->codec_priv.data) {
2259 ffio_init_context(&b, track->codec_priv.data,
2260 track->codec_priv.size,
2261 0, NULL, NULL, NULL, NULL);
2262 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2265 codec_id = st->codecpar->codec_id;
2266 fourcc = st->codecpar->codec_tag;
2267 extradata_offset = FFMIN(track->codec_priv.size, 18);
2268 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2269 /* Normally 36, but allow noncompliant private data */
2270 && (track->codec_priv.size >= 32)
2271 && (track->codec_priv.data)) {
2272 uint16_t sample_size;
2273 int ret = get_qt_codec(track, &fourcc, &codec_id);
2276 sample_size = AV_RB16(track->codec_priv.data + 26);
2278 if (sample_size == 8) {
2279 fourcc = MKTAG('r','a','w',' ');
2280 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2281 } else if (sample_size == 16) {
2282 fourcc = MKTAG('t','w','o','s');
2283 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2286 if ((fourcc == MKTAG('t','w','o','s') ||
2287 fourcc == MKTAG('s','o','w','t')) &&
2289 codec_id = AV_CODEC_ID_PCM_S8;
2290 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2291 (track->codec_priv.size >= 21) &&
2292 (track->codec_priv.data)) {
2293 int ret = get_qt_codec(track, &fourcc, &codec_id);
2296 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2297 fourcc = MKTAG('S','V','Q','3');
2298 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2300 if (codec_id == AV_CODEC_ID_NONE)
2301 av_log(matroska->ctx, AV_LOG_ERROR,
2302 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2303 if (track->codec_priv.size >= 86) {
2304 bit_depth = AV_RB16(track->codec_priv.data + 82);
2305 ffio_init_context(&b, track->codec_priv.data,
2306 track->codec_priv.size,
2307 0, NULL, NULL, NULL, NULL);
2308 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2310 track->has_palette = 1;
2313 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2314 switch (track->audio.bitdepth) {
2316 codec_id = AV_CODEC_ID_PCM_U8;
2319 codec_id = AV_CODEC_ID_PCM_S24BE;
2322 codec_id = AV_CODEC_ID_PCM_S32BE;
2325 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2326 switch (track->audio.bitdepth) {
2328 codec_id = AV_CODEC_ID_PCM_U8;
2331 codec_id = AV_CODEC_ID_PCM_S24LE;
2334 codec_id = AV_CODEC_ID_PCM_S32LE;
2337 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2338 track->audio.bitdepth == 64) {
2339 codec_id = AV_CODEC_ID_PCM_F64LE;
2340 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2341 int profile = matroska_aac_profile(track->codec_id);
2342 int sri = matroska_aac_sri(track->audio.samplerate);
2343 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2345 return AVERROR(ENOMEM);
2346 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2347 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2348 if (strstr(track->codec_id, "SBR")) {
2349 sri = matroska_aac_sri(track->audio.out_samplerate);
2350 extradata[2] = 0x56;
2351 extradata[3] = 0xE5;
2352 extradata[4] = 0x80 | (sri << 3);
2356 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2357 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2358 * Create the "atom size", "tag", and "tag version" fields the
2359 * decoder expects manually. */
2360 extradata_size = 12 + track->codec_priv.size;
2361 extradata = av_mallocz(extradata_size +
2362 AV_INPUT_BUFFER_PADDING_SIZE);
2364 return AVERROR(ENOMEM);
2365 AV_WB32(extradata, extradata_size);
2366 memcpy(&extradata[4], "alac", 4);
2367 AV_WB32(&extradata[8], 0);
2368 memcpy(&extradata[12], track->codec_priv.data,
2369 track->codec_priv.size);
2370 } else if (codec_id == AV_CODEC_ID_TTA) {
2371 extradata_size = 30;
2372 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2374 return AVERROR(ENOMEM);
2375 ffio_init_context(&b, extradata, extradata_size, 1,
2376 NULL, NULL, NULL, NULL);
2377 avio_write(&b, "TTA1", 4);
2379 if (track->audio.channels > UINT16_MAX ||
2380 track->audio.bitdepth > UINT16_MAX) {
2381 av_log(matroska->ctx, AV_LOG_WARNING,
2382 "Too large audio channel number %"PRIu64
2383 " or bitdepth %"PRIu64". Skipping track.\n",
2384 track->audio.channels, track->audio.bitdepth);
2385 av_freep(&extradata);
2386 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2387 return AVERROR_INVALIDDATA;
2391 avio_wl16(&b, track->audio.channels);
2392 avio_wl16(&b, track->audio.bitdepth);
2393 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2394 return AVERROR_INVALIDDATA;
2395 avio_wl32(&b, track->audio.out_samplerate);
2396 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2397 track->audio.out_samplerate,
2398 AV_TIME_BASE * 1000));
2399 } else if (codec_id == AV_CODEC_ID_RV10 ||
2400 codec_id == AV_CODEC_ID_RV20 ||
2401 codec_id == AV_CODEC_ID_RV30 ||
2402 codec_id == AV_CODEC_ID_RV40) {
2403 extradata_offset = 26;
2404 } else if (codec_id == AV_CODEC_ID_RA_144) {
2405 track->audio.out_samplerate = 8000;
2406 track->audio.channels = 1;
2407 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2408 codec_id == AV_CODEC_ID_COOK ||
2409 codec_id == AV_CODEC_ID_ATRAC3 ||
2410 codec_id == AV_CODEC_ID_SIPR)
2411 && track->codec_priv.data) {
2414 ffio_init_context(&b, track->codec_priv.data,
2415 track->codec_priv.size,
2416 0, NULL, NULL, NULL, NULL);
2418 flavor = avio_rb16(&b);
2419 track->audio.coded_framesize = avio_rb32(&b);
2421 track->audio.sub_packet_h = avio_rb16(&b);
2422 track->audio.frame_size = avio_rb16(&b);
2423 track->audio.sub_packet_size = avio_rb16(&b);
2425 track->audio.coded_framesize <= 0 ||
2426 track->audio.sub_packet_h <= 0 ||
2427 track->audio.frame_size <= 0 ||
2428 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2429 return AVERROR_INVALIDDATA;
2430 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2431 track->audio.frame_size);
2432 if (!track->audio.buf)
2433 return AVERROR(ENOMEM);
2434 if (codec_id == AV_CODEC_ID_RA_288) {
2435 st->codecpar->block_align = track->audio.coded_framesize;
2436 track->codec_priv.size = 0;
2438 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2439 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2440 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2441 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2443 st->codecpar->block_align = track->audio.sub_packet_size;
2444 extradata_offset = 78;
2446 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2447 ret = matroska_parse_flac(s, track, &extradata_offset);
2450 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2451 fourcc = AV_RL32(track->codec_priv.data);
2452 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2453 /* we don't need any value stored in CodecPrivate.
2454 make sure that it's not exported as extradata. */
2455 track->codec_priv.size = 0;
2456 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2457 /* For now, propagate only the OBUs, if any. Once libavcodec is
2458 updated to handle isobmff style extradata this can be removed. */
2459 extradata_offset = 4;
2461 track->codec_priv.size -= extradata_offset;
2463 if (codec_id == AV_CODEC_ID_NONE)
2464 av_log(matroska->ctx, AV_LOG_INFO,
2465 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2467 if (track->time_scale < 0.01)
2468 track->time_scale = 1.0;
2469 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2470 1000 * 1000 * 1000); /* 64 bit pts in ns */
2472 /* convert the delay from ns to the track timebase */
2473 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2474 (AVRational){ 1, 1000000000 },
2477 st->codecpar->codec_id = codec_id;
2479 if (strcmp(track->language, "und"))
2480 av_dict_set(&st->metadata, "language", track->language, 0);
2481 av_dict_set(&st->metadata, "title", track->name, 0);
2483 if (track->flag_default)
2484 st->disposition |= AV_DISPOSITION_DEFAULT;
2485 if (track->flag_forced)
2486 st->disposition |= AV_DISPOSITION_FORCED;
2488 if (!st->codecpar->extradata) {
2490 st->codecpar->extradata = extradata;
2491 st->codecpar->extradata_size = extradata_size;
2492 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2493 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2494 return AVERROR(ENOMEM);
2495 memcpy(st->codecpar->extradata,
2496 track->codec_priv.data + extradata_offset,
2497 track->codec_priv.size);
2501 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2502 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2503 int display_width_mul = 1;
2504 int display_height_mul = 1;
2506 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2507 st->codecpar->codec_tag = fourcc;
2509 st->codecpar->bits_per_coded_sample = bit_depth;
2510 st->codecpar->width = track->video.pixel_width;
2511 st->codecpar->height = track->video.pixel_height;
2513 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2514 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2515 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2516 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2518 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2519 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2521 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2522 av_reduce(&st->sample_aspect_ratio.num,
2523 &st->sample_aspect_ratio.den,
2524 st->codecpar->height * track->video.display_width * display_width_mul,
2525 st->codecpar->width * track->video.display_height * display_height_mul,
2528 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2529 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2531 if (track->default_duration) {
2532 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2533 1000000000, track->default_duration, 30000);
2534 #if FF_API_R_FRAME_RATE
2535 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2536 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2537 st->r_frame_rate = st->avg_frame_rate;
2541 /* export stereo mode flag as metadata tag */
2542 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2543 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2545 /* export alpha mode flag as metadata tag */
2546 if (track->video.alpha_mode)
2547 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2549 /* if we have virtual track, mark the real tracks */
2550 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2552 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2554 snprintf(buf, sizeof(buf), "%s_%d",
2555 ff_matroska_video_stereo_plane[planes[j].type], i);
2556 for (k=0; k < matroska->tracks.nb_elem; k++)
2557 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2558 av_dict_set(&tracks[k].stream->metadata,
2559 "stereo_mode", buf, 0);
2563 // add stream level stereo3d side data if it is a supported format
2564 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2565 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2566 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2571 ret = mkv_parse_video_color(st, track);
2574 ret = mkv_parse_video_projection(st, track);
2577 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2578 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2579 st->codecpar->codec_tag = fourcc;
2580 st->codecpar->sample_rate = track->audio.out_samplerate;
2581 st->codecpar->channels = track->audio.channels;
2582 if (!st->codecpar->bits_per_coded_sample)
2583 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2584 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2585 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2586 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2587 st->need_parsing = AVSTREAM_PARSE_FULL;
2588 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2589 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2590 if (track->codec_delay > 0) {
2591 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2592 (AVRational){1, 1000000000},
2593 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2594 48000 : st->codecpar->sample_rate});
2596 if (track->seek_preroll > 0) {
2597 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2598 (AVRational){1, 1000000000},
2599 (AVRational){1, st->codecpar->sample_rate});
2601 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2602 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2604 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2605 st->disposition |= AV_DISPOSITION_CAPTIONS;
2606 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2607 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2608 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2609 st->disposition |= AV_DISPOSITION_METADATA;
2611 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2612 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2613 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2614 matroska->contains_ssa = 1;
2621 static int matroska_read_header(AVFormatContext *s)
2623 MatroskaDemuxContext *matroska = s->priv_data;
2624 EbmlList *attachments_list = &matroska->attachments;
2625 EbmlList *chapters_list = &matroska->chapters;
2626 MatroskaAttachment *attachments;
2627 MatroskaChapter *chapters;
2628 uint64_t max_start = 0;
2634 matroska->cues_parsing_deferred = 1;
2636 /* First read the EBML header. */
2637 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2638 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2639 ebml_free(ebml_syntax, &ebml);
2640 return AVERROR_INVALIDDATA;
2642 if (ebml.version > EBML_VERSION ||
2643 ebml.max_size > sizeof(uint64_t) ||
2644 ebml.id_length > sizeof(uint32_t) ||
2645 ebml.doctype_version > 3) {
2646 avpriv_report_missing_feature(matroska->ctx,
2647 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2648 ebml.version, ebml.doctype, ebml.doctype_version);
2649 ebml_free(ebml_syntax, &ebml);
2650 return AVERROR_PATCHWELCOME;
2651 } else if (ebml.doctype_version == 3) {
2652 av_log(matroska->ctx, AV_LOG_WARNING,
2653 "EBML header using unsupported features\n"
2654 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2655 ebml.version, ebml.doctype, ebml.doctype_version);
2657 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2658 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2660 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2661 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2662 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2663 ebml_free(ebml_syntax, &ebml);
2664 return AVERROR_INVALIDDATA;
2667 ebml_free(ebml_syntax, &ebml);
2669 /* The next thing is a segment. */
2670 pos = avio_tell(matroska->ctx->pb);
2671 res = ebml_parse(matroska, matroska_segments, matroska);
2672 // try resyncing until we find a EBML_STOP type element.
2674 res = matroska_resync(matroska, pos);
2677 pos = avio_tell(matroska->ctx->pb);
2678 res = ebml_parse(matroska, matroska_segment, matroska);
2680 matroska_execute_seekhead(matroska);
2682 if (!matroska->time_scale)
2683 matroska->time_scale = 1000000;
2684 if (matroska->duration)
2685 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2686 1000 / AV_TIME_BASE;
2687 av_dict_set(&s->metadata, "title", matroska->title, 0);
2688 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2690 if (matroska->date_utc.size == 8)
2691 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2693 res = matroska_parse_tracks(s);
2697 attachments = attachments_list->elem;
2698 for (j = 0; j < attachments_list->nb_elem; j++) {
2699 if (!(attachments[j].filename && attachments[j].mime &&
2700 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2701 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2703 AVStream *st = avformat_new_stream(s, NULL);
2706 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2707 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2708 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2710 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2711 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2712 strlen(ff_mkv_image_mime_tags[i].str))) {
2713 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2718 attachments[j].stream = st;
2720 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2721 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2722 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2724 av_init_packet(&st->attached_pic);
2725 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2727 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2728 st->attached_pic.stream_index = st->index;
2729 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2731 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2732 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2734 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2735 attachments[j].bin.size);
2737 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2738 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2739 strlen(ff_mkv_mime_tags[i].str))) {
2740 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2748 chapters = chapters_list->elem;
2749 for (i = 0; i < chapters_list->nb_elem; i++)
2750 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2751 (max_start == 0 || chapters[i].start > max_start)) {
2752 chapters[i].chapter =
2753 avpriv_new_chapter(s, chapters[i].uid,
2754 (AVRational) { 1, 1000000000 },
2755 chapters[i].start, chapters[i].end,
2757 if (chapters[i].chapter) {
2758 av_dict_set(&chapters[i].chapter->metadata,
2759 "title", chapters[i].title, 0);
2761 max_start = chapters[i].start;
2764 matroska_add_index_entries(matroska);
2766 matroska_convert_tags(s);
2770 matroska_read_close(s);
2775 * Put one packet in an application-supplied AVPacket struct.
2776 * Returns 0 on success or -1 on failure.
2778 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2781 if (matroska->queue) {
2782 MatroskaTrack *tracks = matroska->tracks.elem;
2783 MatroskaTrack *track;
2785 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2786 track = &tracks[pkt->stream_index];
2787 if (track->has_palette) {
2788 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2790 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2792 memcpy(pal, track->palette, AVPALETTE_SIZE);
2794 track->has_palette = 0;
2803 * Free all packets in our internal queue.
2805 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2807 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2810 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2811 int *buf_size, int type,
2812 uint32_t **lace_buf, int *laces)
2814 int res = 0, n, size = *buf_size;
2815 uint8_t *data = *buf;
2816 uint32_t *lace_size;
2820 *lace_buf = av_mallocz(sizeof(int));
2822 return AVERROR(ENOMEM);
2824 *lace_buf[0] = size;
2828 av_assert0(size > 0);
2832 lace_size = av_mallocz(*laces * sizeof(int));
2834 return AVERROR(ENOMEM);
2837 case 0x1: /* Xiph lacing */
2841 for (n = 0; res == 0 && n < *laces - 1; n++) {
2843 if (size <= total) {
2844 res = AVERROR_INVALIDDATA;
2849 lace_size[n] += temp;
2856 if (size <= total) {
2857 res = AVERROR_INVALIDDATA;
2861 lace_size[n] = size - total;
2865 case 0x2: /* fixed-size lacing */
2866 if (size % (*laces)) {
2867 res = AVERROR_INVALIDDATA;
2870 for (n = 0; n < *laces; n++)
2871 lace_size[n] = size / *laces;
2874 case 0x3: /* EBML lacing */
2878 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2879 if (n < 0 || num > INT_MAX) {
2880 av_log(matroska->ctx, AV_LOG_INFO,
2881 "EBML block data error\n");
2882 res = n<0 ? n : AVERROR_INVALIDDATA;
2887 total = lace_size[0] = num;
2888 for (n = 1; res == 0 && n < *laces - 1; n++) {
2891 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2892 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2893 av_log(matroska->ctx, AV_LOG_INFO,
2894 "EBML block data error\n");
2895 res = r<0 ? r : AVERROR_INVALIDDATA;
2900 lace_size[n] = lace_size[n - 1] + snum;
2901 total += lace_size[n];
2903 if (size <= total) {
2904 res = AVERROR_INVALIDDATA;
2907 lace_size[*laces - 1] = size - total;
2913 *lace_buf = lace_size;
2919 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2920 MatroskaTrack *track, AVStream *st,
2921 uint8_t *data, int size, uint64_t timecode,
2924 int a = st->codecpar->block_align;
2925 int sps = track->audio.sub_packet_size;
2926 int cfs = track->audio.coded_framesize;
2927 int h = track->audio.sub_packet_h;
2928 int y = track->audio.sub_packet_cnt;
2929 int w = track->audio.frame_size;
2932 if (!track->audio.pkt_cnt) {
2933 if (track->audio.sub_packet_cnt == 0)
2934 track->audio.buf_timecode = timecode;
2935 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2936 if (size < cfs * h / 2) {
2937 av_log(matroska->ctx, AV_LOG_ERROR,
2938 "Corrupt int4 RM-style audio packet size\n");
2939 return AVERROR_INVALIDDATA;
2941 for (x = 0; x < h / 2; x++)
2942 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2943 data + x * cfs, cfs);
2944 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2946 av_log(matroska->ctx, AV_LOG_ERROR,
2947 "Corrupt sipr RM-style audio packet size\n");
2948 return AVERROR_INVALIDDATA;
2950 memcpy(track->audio.buf + y * w, data, w);
2952 if (size < sps * w / sps || h<=0 || w%sps) {
2953 av_log(matroska->ctx, AV_LOG_ERROR,
2954 "Corrupt generic RM-style audio packet size\n");
2955 return AVERROR_INVALIDDATA;
2957 for (x = 0; x < w / sps; x++)
2958 memcpy(track->audio.buf +
2959 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2960 data + x * sps, sps);
2963 if (++track->audio.sub_packet_cnt >= h) {
2964 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2965 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2966 track->audio.sub_packet_cnt = 0;
2967 track->audio.pkt_cnt = h * w / a;
2971 while (track->audio.pkt_cnt) {
2973 AVPacket pktl, *pkt = &pktl;
2975 ret = av_new_packet(pkt, a);
2980 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2982 pkt->pts = track->audio.buf_timecode;
2983 track->audio.buf_timecode = AV_NOPTS_VALUE;
2985 pkt->stream_index = st->index;
2986 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2988 av_packet_unref(pkt);
2989 return AVERROR(ENOMEM);
2996 /* reconstruct full wavpack blocks from mangled matroska ones */
2997 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2998 uint8_t **pdst, int *size)
3000 uint8_t *dst = NULL;
3005 int ret, offset = 0;
3007 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3008 return AVERROR_INVALIDDATA;
3010 ver = AV_RL16(track->stream->codecpar->extradata);
3012 samples = AV_RL32(src);
3016 while (srclen >= 8) {
3021 uint32_t flags = AV_RL32(src);
3022 uint32_t crc = AV_RL32(src + 4);
3026 multiblock = (flags & 0x1800) != 0x1800;
3029 ret = AVERROR_INVALIDDATA;
3032 blocksize = AV_RL32(src);
3038 if (blocksize > srclen) {
3039 ret = AVERROR_INVALIDDATA;
3043 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3045 ret = AVERROR(ENOMEM);
3049 dstlen += blocksize + 32;
3051 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3052 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3053 AV_WL16(dst + offset + 8, ver); // version
3054 AV_WL16(dst + offset + 10, 0); // track/index_no
3055 AV_WL32(dst + offset + 12, 0); // total samples
3056 AV_WL32(dst + offset + 16, 0); // block index
3057 AV_WL32(dst + offset + 20, samples); // number of samples
3058 AV_WL32(dst + offset + 24, flags); // flags
3059 AV_WL32(dst + offset + 28, crc); // crc
3060 memcpy(dst + offset + 32, src, blocksize); // block data
3063 srclen -= blocksize;
3064 offset += blocksize + 32;
3067 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3079 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3080 uint8_t **pdst, int *size)
3085 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3086 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3088 return AVERROR(ENOMEM);
3090 AV_WB32(dst, dstlen);
3091 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3092 memcpy(dst + 8, src, dstlen);
3093 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3103 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3104 MatroskaTrack *track,
3106 uint8_t *data, int data_len,
3111 AVPacket pktl, *pkt = &pktl;
3112 uint8_t *id, *settings, *text, *buf;
3113 int id_len, settings_len, text_len;
3118 return AVERROR_INVALIDDATA;
3121 q = data + data_len;
3126 if (*p == '\r' || *p == '\n') {
3135 if (p >= q || *p != '\n')
3136 return AVERROR_INVALIDDATA;
3142 if (*p == '\r' || *p == '\n') {
3143 settings_len = p - settings;
3151 if (p >= q || *p != '\n')
3152 return AVERROR_INVALIDDATA;
3157 while (text_len > 0) {
3158 const int len = text_len - 1;
3159 const uint8_t c = p[len];
3160 if (c != '\r' && c != '\n')
3166 return AVERROR_INVALIDDATA;
3168 err = av_new_packet(pkt, text_len);
3173 memcpy(pkt->data, text, text_len);
3176 buf = av_packet_new_side_data(pkt,
3177 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3180 av_packet_unref(pkt);
3181 return AVERROR(ENOMEM);
3183 memcpy(buf, id, id_len);
3186 if (settings_len > 0) {
3187 buf = av_packet_new_side_data(pkt,
3188 AV_PKT_DATA_WEBVTT_SETTINGS,
3191 av_packet_unref(pkt);
3192 return AVERROR(ENOMEM);
3194 memcpy(buf, settings, settings_len);
3197 // Do we need this for subtitles?
3198 // pkt->flags = AV_PKT_FLAG_KEY;
3200 pkt->stream_index = st->index;
3201 pkt->pts = timecode;
3203 // Do we need this for subtitles?
3204 // pkt->dts = timecode;
3206 pkt->duration = duration;
3209 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3211 av_packet_unref(pkt);
3212 return AVERROR(ENOMEM);
3218 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3219 MatroskaTrack *track, AVStream *st,
3220 AVBufferRef *buf, uint8_t *data, int pkt_size,
3221 uint64_t timecode, uint64_t lace_duration,
3222 int64_t pos, int is_keyframe,
3223 uint8_t *additional, uint64_t additional_id, int additional_size,
3224 int64_t discard_padding)
3226 MatroskaTrackEncoding *encodings = track->encodings.elem;
3227 uint8_t *pkt_data = data;
3229 AVPacket pktl, *pkt = &pktl;
3231 if (encodings && !encodings->type && encodings->scope & 1) {
3232 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3237 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3239 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3241 av_log(matroska->ctx, AV_LOG_ERROR,
3242 "Error parsing a wavpack block.\n");
3245 if (pkt_data != data)
3246 av_freep(&pkt_data);
3250 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3252 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3254 av_log(matroska->ctx, AV_LOG_ERROR,
3255 "Error parsing a prores block.\n");
3258 if (pkt_data != data)
3259 av_freep(&pkt_data);
3263 av_init_packet(pkt);
3264 if (pkt_data != data)
3265 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3268 pkt->buf = av_buffer_ref(buf);
3271 res = AVERROR(ENOMEM);
3275 pkt->data = pkt_data;
3276 pkt->size = pkt_size;
3277 pkt->flags = is_keyframe;
3278 pkt->stream_index = st->index;
3280 if (additional_size > 0) {
3281 uint8_t *side_data = av_packet_new_side_data(pkt,
3282 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3283 additional_size + 8);
3285 av_packet_unref(pkt);
3286 return AVERROR(ENOMEM);
3288 AV_WB64(side_data, additional_id);
3289 memcpy(side_data + 8, additional, additional_size);
3292 if (discard_padding) {
3293 uint8_t *side_data = av_packet_new_side_data(pkt,
3294 AV_PKT_DATA_SKIP_SAMPLES,
3297 av_packet_unref(pkt);
3298 return AVERROR(ENOMEM);
3300 discard_padding = av_rescale_q(discard_padding,
3301 (AVRational){1, 1000000000},
3302 (AVRational){1, st->codecpar->sample_rate});
3303 if (discard_padding > 0) {
3304 AV_WL32(side_data + 4, discard_padding);
3306 AV_WL32(side_data, -discard_padding);
3310 if (track->ms_compat)
3311 pkt->dts = timecode;
3313 pkt->pts = timecode;
3315 pkt->duration = lace_duration;
3317 #if FF_API_CONVERGENCE_DURATION
3318 FF_DISABLE_DEPRECATION_WARNINGS
3319 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3320 pkt->convergence_duration = lace_duration;
3322 FF_ENABLE_DEPRECATION_WARNINGS
3325 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3327 av_packet_unref(pkt);
3328 return AVERROR(ENOMEM);
3334 if (pkt_data != data)
3335 av_freep(&pkt_data);
3339 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3340 int size, int64_t pos, uint64_t cluster_time,
3341 uint64_t block_duration, int is_keyframe,
3342 uint8_t *additional, uint64_t additional_id, int additional_size,
3343 int64_t cluster_pos, int64_t discard_padding)
3345 uint64_t timecode = AV_NOPTS_VALUE;
3346 MatroskaTrack *track;
3350 uint32_t *lace_size = NULL;
3351 int n, flags, laces = 0;
3353 int trust_default_duration = 1;
3355 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3356 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3362 track = matroska_find_track_by_num(matroska, num);
3363 if (!track || !track->stream) {
3364 av_log(matroska->ctx, AV_LOG_INFO,
3365 "Invalid stream %"PRIu64" or size %u\n", num, size);
3366 return AVERROR_INVALIDDATA;
3367 } else if (size <= 3)
3370 if (st->discard >= AVDISCARD_ALL)
3372 av_assert1(block_duration != AV_NOPTS_VALUE);
3374 block_time = sign_extend(AV_RB16(data), 16);
3378 if (is_keyframe == -1)
3379 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3381 if (cluster_time != (uint64_t) -1 &&
3382 (block_time >= 0 || cluster_time >= -block_time)) {
3383 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3384 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3385 timecode < track->end_timecode)
3386 is_keyframe = 0; /* overlapping subtitles are not key frame */
3388 ff_reduce_index(matroska->ctx, st->index);
3389 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3394 if (matroska->skip_to_keyframe &&
3395 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3396 // Compare signed timecodes. Timecode may be negative due to codec delay
3397 // offset. We don't support timestamps greater than int64_t anyway - see
3399 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3402 matroska->skip_to_keyframe = 0;
3403 else if (!st->skip_to_keyframe) {
3404 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3405 matroska->skip_to_keyframe = 0;
3409 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3410 &lace_size, &laces);
3415 if (track->audio.samplerate == 8000) {
3416 // If this is needed for more codecs, then add them here
3417 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3418 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3419 trust_default_duration = 0;
3423 if (!block_duration && trust_default_duration)
3424 block_duration = track->default_duration * laces / matroska->time_scale;
3426 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3427 track->end_timecode =
3428 FFMAX(track->end_timecode, timecode + block_duration);
3430 for (n = 0; n < laces; n++) {
3431 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3433 if (lace_size[n] > size) {
3434 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3438 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3439 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3440 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3441 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3442 st->codecpar->block_align && track->audio.sub_packet_size) {
3443 res = matroska_parse_rm_audio(matroska, track, st, data,
3449 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3450 res = matroska_parse_webvtt(matroska, track, st,
3452 timecode, lace_duration,
3457 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3458 timecode, lace_duration, pos,
3459 !n ? is_keyframe : 0,
3460 additional, additional_id, additional_size,
3466 if (timecode != AV_NOPTS_VALUE)
3467 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3468 data += lace_size[n];
3469 size -= lace_size[n];
3477 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3479 EbmlList *blocks_list;
3480 MatroskaBlock *blocks;
3482 res = ebml_parse(matroska,
3483 matroska_cluster_incremental_parsing,
3484 &matroska->current_cluster);
3487 if (matroska->current_cluster_pos)
3488 ebml_level_end(matroska);
3489 ebml_free(matroska_cluster, &matroska->current_cluster);
3490 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3491 matroska->current_cluster_num_blocks = 0;
3492 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3493 /* sizeof the ID which was already read */
3494 if (matroska->current_id)
3495 matroska->current_cluster_pos -= 4;
3496 res = ebml_parse(matroska,
3497 matroska_clusters_incremental,
3498 &matroska->current_cluster);
3499 /* Try parsing the block again. */
3501 res = ebml_parse(matroska,
3502 matroska_cluster_incremental_parsing,
3503 &matroska->current_cluster);
3507 matroska->current_cluster_num_blocks <
3508 matroska->current_cluster.blocks.nb_elem) {
3509 blocks_list = &matroska->current_cluster.blocks;
3510 blocks = blocks_list->elem;
3512 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3513 i = blocks_list->nb_elem - 1;
3514 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3515 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3516 uint8_t* additional = blocks[i].additional.size > 0 ?
3517 blocks[i].additional.data : NULL;
3518 if (!blocks[i].non_simple)
3519 blocks[i].duration = 0;
3520 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3521 blocks[i].bin.size, blocks[i].bin.pos,
3522 matroska->current_cluster.timecode,
3523 blocks[i].duration, is_keyframe,
3524 additional, blocks[i].additional_id,
3525 blocks[i].additional.size,
3526 matroska->current_cluster_pos,
3527 blocks[i].discard_padding);
3534 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3536 MatroskaCluster cluster = { 0 };
3537 EbmlList *blocks_list;
3538 MatroskaBlock *blocks;
3542 if (!matroska->contains_ssa)
3543 return matroska_parse_cluster_incremental(matroska);
3544 pos = avio_tell(matroska->ctx->pb);
3545 if (matroska->current_id)
3546 pos -= 4; /* sizeof the ID which was already read */
3547 res = ebml_parse(matroska, matroska_clusters, &cluster);
3548 blocks_list = &cluster.blocks;
3549 blocks = blocks_list->elem;
3550 for (i = 0; i < blocks_list->nb_elem; i++)
3551 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3552 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3553 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3554 blocks[i].bin.size, blocks[i].bin.pos,
3555 cluster.timecode, blocks[i].duration,
3556 is_keyframe, NULL, 0, 0, pos,
3557 blocks[i].discard_padding);
3559 ebml_free(matroska_cluster, &cluster);
3563 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3565 MatroskaDemuxContext *matroska = s->priv_data;
3568 while (matroska_deliver_packet(matroska, pkt)) {
3569 int64_t pos = avio_tell(matroska->ctx->pb);
3571 return (ret < 0) ? ret : AVERROR_EOF;
3572 if (matroska_parse_cluster(matroska) < 0)
3573 ret = matroska_resync(matroska, pos);
3579 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3580 int64_t timestamp, int flags)
3582 MatroskaDemuxContext *matroska = s->priv_data;
3583 MatroskaTrack *tracks = NULL;
3584 AVStream *st = s->streams[stream_index];
3585 int i, index, index_min;
3587 /* Parse the CUES now since we need the index data to seek. */
3588 if (matroska->cues_parsing_deferred > 0) {
3589 matroska->cues_parsing_deferred = 0;
3590 matroska_parse_cues(matroska);
3593 if (!st->nb_index_entries)
3595 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3597 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3598 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3600 matroska->current_id = 0;
3601 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3602 matroska_clear_queue(matroska);
3603 if (matroska_parse_cluster(matroska) < 0)
3608 matroska_clear_queue(matroska);
3609 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3613 tracks = matroska->tracks.elem;
3614 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3615 tracks[i].audio.pkt_cnt = 0;
3616 tracks[i].audio.sub_packet_cnt = 0;
3617 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3618 tracks[i].end_timecode = 0;
3621 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3622 matroska->current_id = 0;
3623 if (flags & AVSEEK_FLAG_ANY) {
3624 st->skip_to_keyframe = 0;
3625 matroska->skip_to_timecode = timestamp;
3627 st->skip_to_keyframe = 1;
3628 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3630 matroska->skip_to_keyframe = 1;
3632 matroska->num_levels = 0;
3633 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3636 // slightly hackish but allows proper fallback to
3637 // the generic seeking code.
3638 matroska_clear_queue(matroska);
3639 matroska->current_id = 0;
3640 st->skip_to_keyframe =
3641 matroska->skip_to_keyframe = 0;
3643 matroska->num_levels = 0;
3647 static int matroska_read_close(AVFormatContext *s)
3649 MatroskaDemuxContext *matroska = s->priv_data;
3650 MatroskaTrack *tracks = matroska->tracks.elem;
3653 matroska_clear_queue(matroska);
3655 for (n = 0; n < matroska->tracks.nb_elem; n++)
3656 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3657 av_freep(&tracks[n].audio.buf);
3658 ebml_free(matroska_cluster, &matroska->current_cluster);
3659 ebml_free(matroska_segment, matroska);
3665 int64_t start_time_ns;
3666 int64_t end_time_ns;
3667 int64_t start_offset;
3671 /* This function searches all the Cues and returns the CueDesc corresponding to
3672 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3673 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3675 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3676 MatroskaDemuxContext *matroska = s->priv_data;
3679 int nb_index_entries = s->streams[0]->nb_index_entries;
3680 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3681 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3682 for (i = 1; i < nb_index_entries; i++) {
3683 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3684 index_entries[i].timestamp * matroska->time_scale > ts) {
3689 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3690 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3691 if (i != nb_index_entries - 1) {
3692 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3693 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3695 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3696 // FIXME: this needs special handling for files where Cues appear
3697 // before Clusters. the current logic assumes Cues appear after
3699 cue_desc.end_offset = cues_start - matroska->segment_start;
3704 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3706 MatroskaDemuxContext *matroska = s->priv_data;
3707 int64_t cluster_pos, before_pos;
3709 if (s->streams[0]->nb_index_entries <= 0) return 0;
3710 // seek to the first cluster using cues.
3711 index = av_index_search_timestamp(s->streams[0], 0, 0);
3712 if (index < 0) return 0;
3713 cluster_pos = s->streams[0]->index_entries[index].pos;
3714 before_pos = avio_tell(s->pb);
3716 int64_t cluster_id = 0, cluster_length = 0;
3718 avio_seek(s->pb, cluster_pos, SEEK_SET);
3719 // read cluster id and length
3720 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3721 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3722 if (cluster_id != 0xF43B675) { // done with all clusters
3725 avio_seek(s->pb, cluster_pos, SEEK_SET);
3726 matroska->current_id = 0;
3727 matroska_clear_queue(matroska);
3728 if (matroska_parse_cluster(matroska) < 0 ||
3732 pkt = &matroska->queue->pkt;
3733 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3734 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3739 avio_seek(s->pb, before_pos, SEEK_SET);
3743 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3744 double min_buffer, double* buffer,
3745 double* sec_to_download, AVFormatContext *s,
3748 double nano_seconds_per_second = 1000000000.0;
3749 double time_sec = time_ns / nano_seconds_per_second;
3751 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3752 int64_t end_time_ns = time_ns + time_to_search_ns;
3753 double sec_downloaded = 0.0;
3754 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3755 if (desc_curr.start_time_ns == -1)
3757 *sec_to_download = 0.0;
3759 // Check for non cue start time.
3760 if (time_ns > desc_curr.start_time_ns) {
3761 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3762 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3763 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3764 double timeToDownload = (cueBytes * 8.0) / bps;
3766 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3767 *sec_to_download += timeToDownload;
3769 // Check if the search ends within the first cue.
3770 if (desc_curr.end_time_ns >= end_time_ns) {
3771 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3772 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3773 sec_downloaded = percent_to_sub * sec_downloaded;
3774 *sec_to_download = percent_to_sub * *sec_to_download;
3777 if ((sec_downloaded + *buffer) <= min_buffer) {
3781 // Get the next Cue.
3782 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3785 while (desc_curr.start_time_ns != -1) {
3786 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3787 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3788 double desc_sec = desc_ns / nano_seconds_per_second;
3789 double bits = (desc_bytes * 8.0);
3790 double time_to_download = bits / bps;
3792 sec_downloaded += desc_sec - time_to_download;
3793 *sec_to_download += time_to_download;
3795 if (desc_curr.end_time_ns >= end_time_ns) {
3796 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3797 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3798 sec_downloaded = percent_to_sub * sec_downloaded;
3799 *sec_to_download = percent_to_sub * *sec_to_download;
3801 if ((sec_downloaded + *buffer) <= min_buffer)
3806 if ((sec_downloaded + *buffer) <= min_buffer) {
3811 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3813 *buffer = *buffer + sec_downloaded;
3817 /* This function computes the bandwidth of the WebM file with the help of
3818 * buffer_size_after_time_downloaded() function. Both of these functions are
3819 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3820 * Matroska parsing mechanism.
3822 * Returns the bandwidth of the file on success; -1 on error.
3824 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3826 MatroskaDemuxContext *matroska = s->priv_data;
3827 AVStream *st = s->streams[0];
3828 double bandwidth = 0.0;
3831 for (i = 0; i < st->nb_index_entries; i++) {
3832 int64_t prebuffer_ns = 1000000000;
3833 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3834 double nano_seconds_per_second = 1000000000.0;
3835 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3836 double prebuffer_bytes = 0.0;
3837 int64_t temp_prebuffer_ns = prebuffer_ns;
3838 int64_t pre_bytes, pre_ns;
3839 double pre_sec, prebuffer, bits_per_second;
3840 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3842 // Start with the first Cue.
3843 CueDesc desc_end = desc_beg;
3845 // Figure out how much data we have downloaded for the prebuffer. This will
3846 // be used later to adjust the bits per sample to try.
3847 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3848 // Prebuffered the entire Cue.
3849 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3850 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3851 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3853 if (desc_end.start_time_ns == -1) {
3854 // The prebuffer is larger than the duration.
3855 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3857 bits_per_second = 0.0;
3859 // The prebuffer ends in the last Cue. Estimate how much data was
3861 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3862 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3863 pre_sec = pre_ns / nano_seconds_per_second;
3865 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3867 prebuffer = prebuffer_ns / nano_seconds_per_second;
3869 // Set this to 0.0 in case our prebuffer buffers the entire video.
3870 bits_per_second = 0.0;
3872 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3873 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3874 double desc_sec = desc_ns / nano_seconds_per_second;
3875 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3877 // Drop the bps by the percentage of bytes buffered.
3878 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3879 double mod_bits_per_second = calc_bits_per_second * percent;
3881 if (prebuffer < desc_sec) {
3883 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3885 // Add 1 so the bits per second should be a little bit greater than file
3887 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3888 const double min_buffer = 0.0;
3889 double buffer = prebuffer;
3890 double sec_to_download = 0.0;
3892 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3893 min_buffer, &buffer, &sec_to_download,
3897 } else if (rv == 0) {
3898 bits_per_second = (double)(bps);
3903 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3904 } while (desc_end.start_time_ns != -1);
3906 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3908 return (int64_t)bandwidth;
3911 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3913 MatroskaDemuxContext *matroska = s->priv_data;
3914 EbmlList *seekhead_list = &matroska->seekhead;
3915 MatroskaSeekhead *seekhead = seekhead_list->elem;
3917 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3921 // determine cues start and end positions
3922 for (i = 0; i < seekhead_list->nb_elem; i++)
3923 if (seekhead[i].id == MATROSKA_ID_CUES)
3926 if (i >= seekhead_list->nb_elem) return -1;
3928 before_pos = avio_tell(matroska->ctx->pb);
3929 cues_start = seekhead[i].pos + matroska->segment_start;
3930 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3931 // cues_end is computed as cues_start + cues_length + length of the
3932 // Cues element ID + EBML length of the Cues element. cues_end is
3933 // inclusive and the above sum is reduced by 1.
3934 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3935 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3936 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3937 cues_end = cues_start + cues_length + bytes_read - 1;
3939 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3940 if (cues_start == -1 || cues_end == -1) return -1;
3943 matroska_parse_cues(matroska);
3946 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3949 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3951 // if the file has cues at the start, fix up the init range so tht
3952 // it does not include it
3953 if (cues_start <= init_range)
3954 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3957 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3958 if (bandwidth < 0) return -1;
3959 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3961 // check if all clusters start with key frames
3962 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3964 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3965 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3966 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3967 if (!buf) return -1;
3969 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3970 int ret = snprintf(buf + end, 20,
3971 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3972 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3973 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3974 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3976 return AVERROR_INVALIDDATA;
3980 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3986 static int webm_dash_manifest_read_header(AVFormatContext *s)
3989 int ret = matroska_read_header(s);
3991 MatroskaTrack *tracks;
3992 MatroskaDemuxContext *matroska = s->priv_data;
3994 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3997 if (!s->nb_streams) {
3998 matroska_read_close(s);
3999 av_log(s, AV_LOG_ERROR, "No streams found\n");
4000 return AVERROR_INVALIDDATA;
4003 if (!matroska->is_live) {
4004 buf = av_asprintf("%g", matroska->duration);
4005 if (!buf) return AVERROR(ENOMEM);
4006 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4009 // initialization range
4010 // 5 is the offset of Cluster ID.
4011 init_range = avio_tell(s->pb) - 5;
4012 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4015 // basename of the file
4016 buf = strrchr(s->url, '/');
4017 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4020 tracks = matroska->tracks.elem;
4021 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4023 // parse the cues and populate Cue related fields
4024 if (!matroska->is_live) {
4025 ret = webm_dash_manifest_cues(s, init_range);
4027 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4032 // use the bandwidth from the command line if it was provided
4033 if (matroska->bandwidth > 0) {
4034 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4035 matroska->bandwidth, 0);
4040 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4045 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4046 static const AVOption options[] = {
4047 { "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 },
4048 { "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 },
4052 static const AVClass webm_dash_class = {
4053 .class_name = "WebM DASH Manifest demuxer",
4054 .item_name = av_default_item_name,
4056 .version = LIBAVUTIL_VERSION_INT,
4059 AVInputFormat ff_matroska_demuxer = {
4060 .name = "matroska,webm",
4061 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4062 .extensions = "mkv,mk3d,mka,mks",
4063 .priv_data_size = sizeof(MatroskaDemuxContext),
4064 .read_probe = matroska_probe,
4065 .read_header = matroska_read_header,
4066 .read_packet = matroska_read_packet,
4067 .read_close = matroska_read_close,
4068 .read_seek = matroska_read_seek,
4069 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4072 AVInputFormat ff_webm_dash_manifest_demuxer = {
4073 .name = "webm_dash_manifest",
4074 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4075 .priv_data_size = sizeof(MatroskaDemuxContext),
4076 .read_header = webm_dash_manifest_read_header,
4077 .read_packet = webm_dash_manifest_read_packet,
4078 .read_close = matroska_read_close,
4079 .priv_class = &webm_dash_class,