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];
333 EbmlList attachments;
339 /* byte position of the segment inside the stream */
340 int64_t segment_start;
342 /* the packet queue */
344 AVPacketList *queue_end;
348 /* What to skip before effectively reading a packet. */
349 int skip_to_keyframe;
350 uint64_t skip_to_timecode;
352 /* File has a CUES element, but we defer parsing until it is needed. */
353 int cues_parsing_deferred;
355 /* Level1 elements and whether they were read yet */
356 MatroskaLevel1Element level1_elems[64];
357 int num_level1_elems;
359 int current_cluster_num_blocks;
360 int64_t current_cluster_pos;
361 MatroskaCluster current_cluster;
363 /* File has SSA subtitles which prevent incremental cluster parsing. */
366 /* WebM DASH Manifest live flag */
369 /* Bandwidth value for WebM DASH Manifest */
371 } MatroskaDemuxContext;
373 typedef struct MatroskaBlock {
378 uint64_t additional_id;
380 int64_t discard_padding;
383 static const EbmlSyntax ebml_header[] = {
384 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
385 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
386 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
387 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
388 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
389 { EBML_ID_EBMLVERSION, EBML_NONE },
390 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
394 static const EbmlSyntax ebml_syntax[] = {
395 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
399 static const EbmlSyntax matroska_info[] = {
400 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
401 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
402 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
403 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
404 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
405 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
406 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
410 static const EbmlSyntax matroska_mastering_meta[] = {
411 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
419 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
420 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
424 static const EbmlSyntax matroska_track_video_color[] = {
425 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
426 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
430 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
431 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
432 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
433 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
435 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
436 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
437 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
438 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
442 static const EbmlSyntax matroska_track_video_projection[] = {
443 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
444 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
445 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
446 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
447 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
451 static const EbmlSyntax matroska_track_video[] = {
452 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
453 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
454 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
455 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
456 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
457 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
458 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
459 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
460 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
461 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
462 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
463 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
464 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
465 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
466 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
467 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
468 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
469 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
473 static const EbmlSyntax matroska_track_audio[] = {
474 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
475 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
476 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
477 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
481 static const EbmlSyntax matroska_track_encoding_compression[] = {
482 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
483 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
487 static const EbmlSyntax matroska_track_encoding_encryption[] = {
488 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
489 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
490 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
493 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
494 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
497 static const EbmlSyntax matroska_track_encoding[] = {
498 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
499 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
500 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
501 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
502 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
506 static const EbmlSyntax matroska_track_encodings[] = {
507 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
511 static const EbmlSyntax matroska_track_plane[] = {
512 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
513 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
517 static const EbmlSyntax matroska_track_combine_planes[] = {
518 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
522 static const EbmlSyntax matroska_track_operation[] = {
523 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
527 static const EbmlSyntax matroska_track[] = {
528 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
529 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
530 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
531 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
532 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
533 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
534 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
535 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
536 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
537 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
538 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
539 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
540 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
541 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
542 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
543 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
544 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
545 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
546 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
547 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
548 { MATROSKA_ID_CODECNAME, EBML_NONE },
549 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
550 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
551 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
552 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
553 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
557 static const EbmlSyntax matroska_tracks[] = {
558 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
562 static const EbmlSyntax matroska_attachment[] = {
563 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
564 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
565 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
566 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
567 { MATROSKA_ID_FILEDESC, EBML_NONE },
571 static const EbmlSyntax matroska_attachments[] = {
572 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
576 static const EbmlSyntax matroska_chapter_display[] = {
577 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
578 { MATROSKA_ID_CHAPLANG, EBML_NONE },
579 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
583 static const EbmlSyntax matroska_chapter_entry[] = {
584 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
585 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
586 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
587 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
588 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
589 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
590 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
591 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
595 static const EbmlSyntax matroska_chapter[] = {
596 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
597 { MATROSKA_ID_EDITIONUID, EBML_NONE },
598 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
599 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
600 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
604 static const EbmlSyntax matroska_chapters[] = {
605 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
609 static const EbmlSyntax matroska_index_pos[] = {
610 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
611 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
612 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
613 { MATROSKA_ID_CUEDURATION, EBML_NONE },
614 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
618 static const EbmlSyntax matroska_index_entry[] = {
619 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
620 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
624 static const EbmlSyntax matroska_index[] = {
625 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
629 static const EbmlSyntax matroska_simpletag[] = {
630 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
631 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
632 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
633 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
634 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
635 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
639 static const EbmlSyntax matroska_tagtargets[] = {
640 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
641 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
642 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
643 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
644 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
648 static const EbmlSyntax matroska_tag[] = {
649 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
650 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
654 static const EbmlSyntax matroska_tags[] = {
655 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
659 static const EbmlSyntax matroska_seekhead_entry[] = {
660 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
661 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
665 static const EbmlSyntax matroska_seekhead[] = {
666 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
670 static const EbmlSyntax matroska_segment[] = {
671 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
672 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
673 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
674 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
675 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
676 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
677 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
678 { MATROSKA_ID_CLUSTER, EBML_STOP },
682 static const EbmlSyntax matroska_segments[] = {
683 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
687 static const EbmlSyntax matroska_blockmore[] = {
688 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
689 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
693 static const EbmlSyntax matroska_blockadditions[] = {
694 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
698 static const EbmlSyntax matroska_blockgroup[] = {
699 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
700 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
701 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
702 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
703 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
704 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
705 { MATROSKA_ID_CODECSTATE, EBML_NONE },
706 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
710 static const EbmlSyntax matroska_cluster[] = {
711 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
712 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
713 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
714 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
715 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
719 static const EbmlSyntax matroska_clusters[] = {
720 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
721 { MATROSKA_ID_INFO, EBML_NONE },
722 { MATROSKA_ID_CUES, EBML_NONE },
723 { MATROSKA_ID_TAGS, EBML_NONE },
724 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
728 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
729 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
730 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
731 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
732 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
733 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
734 { MATROSKA_ID_INFO, EBML_NONE },
735 { MATROSKA_ID_CUES, EBML_NONE },
736 { MATROSKA_ID_TAGS, EBML_NONE },
737 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
738 { MATROSKA_ID_CLUSTER, EBML_STOP },
742 static const EbmlSyntax matroska_cluster_incremental[] = {
743 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
744 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
745 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
746 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
747 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
751 static const EbmlSyntax matroska_clusters_incremental[] = {
752 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
753 { MATROSKA_ID_INFO, EBML_NONE },
754 { MATROSKA_ID_CUES, EBML_NONE },
755 { MATROSKA_ID_TAGS, EBML_NONE },
756 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
760 static const char *const matroska_doctypes[] = { "matroska", "webm" };
762 static int matroska_read_close(AVFormatContext *s);
764 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
766 AVIOContext *pb = matroska->ctx->pb;
769 matroska->current_id = 0;
770 matroska->num_levels = 0;
772 /* seek to next position to resync from */
773 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
780 // try to find a toplevel element
781 while (!avio_feof(pb)) {
782 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
783 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
784 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
785 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
786 matroska->current_id = id;
789 id = (id << 8) | avio_r8(pb);
797 * Return: Whether we reached the end of a level in the hierarchy or not.
799 static int ebml_level_end(MatroskaDemuxContext *matroska)
801 AVIOContext *pb = matroska->ctx->pb;
802 int64_t pos = avio_tell(pb);
804 if (matroska->num_levels > 0) {
805 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
806 if (pos - level->start >= level->length || matroska->current_id) {
807 matroska->num_levels--;
811 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
815 * Read: an "EBML number", which is defined as a variable-length
816 * array of bytes. The first byte indicates the length by giving a
817 * number of 0-bits followed by a one. The position of the first
818 * "one" bit inside the first byte indicates the length of this
820 * Returns: number of bytes read, < 0 on error
822 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
823 int max_size, uint64_t *number)
828 /* The first byte tells us the length in bytes - avio_r8() can normally
829 * return 0, but since that's not a valid first ebmlID byte, we can
830 * use it safely here to catch EOS. */
831 if (!(total = avio_r8(pb))) {
832 /* we might encounter EOS here */
833 if (!avio_feof(pb)) {
834 int64_t pos = avio_tell(pb);
835 av_log(matroska->ctx, AV_LOG_ERROR,
836 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
838 return pb->error ? pb->error : AVERROR(EIO);
843 /* get the length of the EBML number */
844 read = 8 - ff_log2_tab[total];
845 if (read > max_size) {
846 int64_t pos = avio_tell(pb) - 1;
847 av_log(matroska->ctx, AV_LOG_ERROR,
848 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
849 (uint8_t) total, pos, pos);
850 return AVERROR_INVALIDDATA;
853 /* read out length */
854 total ^= 1 << ff_log2_tab[total];
856 total = (total << 8) | avio_r8(pb);
864 * Read a EBML length value.
865 * This needs special handling for the "unknown length" case which has multiple
868 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
871 int res = ebml_read_num(matroska, pb, 8, number);
872 if (res > 0 && *number + 1 == 1ULL << (7 * res))
873 *number = EBML_UNKNOWN_LENGTH;
878 * Read the next element as an unsigned int.
879 * 0 is success, < 0 is failure.
881 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
886 return AVERROR_INVALIDDATA;
888 /* big-endian ordering; build up number */
891 *num = (*num << 8) | avio_r8(pb);
897 * Read the next element as a signed int.
898 * 0 is success, < 0 is failure.
900 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
905 return AVERROR_INVALIDDATA;
910 *num = sign_extend(avio_r8(pb), 8);
912 /* big-endian ordering; build up number */
914 *num = ((uint64_t)*num << 8) | avio_r8(pb);
921 * Read the next element as a float.
922 * 0 is success, < 0 is failure.
924 static int ebml_read_float(AVIOContext *pb, int size, double *num)
929 *num = av_int2float(avio_rb32(pb));
931 *num = av_int2double(avio_rb64(pb));
933 return AVERROR_INVALIDDATA;
939 * Read the next element as an ASCII string.
940 * 0 is success, < 0 is failure.
942 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
946 /* EBML strings are usually not 0-terminated, so we allocate one
947 * byte more, read the string and NULL-terminate it ourselves. */
948 if (!(res = av_malloc(size + 1)))
949 return AVERROR(ENOMEM);
950 if (avio_read(pb, (uint8_t *) res, size) != size) {
962 * Read the next element as binary data.
963 * 0 is success, < 0 is failure.
965 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
969 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
972 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
974 bin->data = bin->buf->data;
976 bin->pos = avio_tell(pb);
977 if (avio_read(pb, bin->data, length) != length) {
978 av_buffer_unref(&bin->buf);
988 * Read the next element, but only the header. The contents
989 * are supposed to be sub-elements which can be read separately.
990 * 0 is success, < 0 is failure.
992 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
994 AVIOContext *pb = matroska->ctx->pb;
995 MatroskaLevel *level;
997 if (matroska->num_levels >= EBML_MAX_DEPTH) {
998 av_log(matroska->ctx, AV_LOG_ERROR,
999 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1000 return AVERROR(ENOSYS);
1003 level = &matroska->levels[matroska->num_levels++];
1004 level->start = avio_tell(pb);
1005 level->length = length;
1011 * Read signed/unsigned "EBML" numbers.
1012 * Return: number of bytes processed, < 0 on error
1014 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1015 uint8_t *data, uint32_t size, uint64_t *num)
1018 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1019 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1023 * Same as above, but signed.
1025 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1026 uint8_t *data, uint32_t size, int64_t *num)
1031 /* read as unsigned number first */
1032 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1035 /* make signed (weird way) */
1036 *num = unum - ((1LL << (7 * res - 1)) - 1);
1041 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1042 EbmlSyntax *syntax, void *data);
1044 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1045 uint32_t id, void *data)
1048 for (i = 0; syntax[i].id; i++)
1049 if (id == syntax[i].id)
1051 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1052 matroska->num_levels > 0 &&
1053 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1054 return 0; // we reached the end of an unknown size cluster
1055 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1056 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1058 return ebml_parse_elem(matroska, &syntax[i], data);
1061 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1064 if (!matroska->current_id) {
1066 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1068 // in live mode, finish parsing if EOF is reached.
1069 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1070 res == AVERROR_EOF) ? 1 : res;
1072 matroska->current_id = id | 1 << 7 * res;
1074 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1077 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1082 for (i = 0; syntax[i].id; i++)
1083 switch (syntax[i].type) {
1085 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1088 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1091 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1095 // the default may be NULL
1096 if (syntax[i].def.s) {
1097 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1098 *dst = av_strdup(syntax[i].def.s);
1100 return AVERROR(ENOMEM);
1105 while (!res && !ebml_level_end(matroska))
1106 res = ebml_parse(matroska, syntax, data);
1111 static int is_ebml_id_valid(uint32_t id)
1113 // Due to endian nonsense in Matroska, the highest byte with any bits set
1114 // will contain the leading length bit. This bit in turn identifies the
1115 // total byte length of the element by its position within the byte.
1116 unsigned int bits = av_log2(id);
1117 return id && (bits + 7) / 8 == (8 - bits % 8);
1121 * Allocate and return the entry for the level1 element with the given ID. If
1122 * an entry already exists, return the existing entry.
1124 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1128 MatroskaLevel1Element *elem;
1130 if (!is_ebml_id_valid(id))
1133 // Some files link to all clusters; useless.
1134 if (id == MATROSKA_ID_CLUSTER)
1137 // There can be multiple seekheads.
1138 if (id != MATROSKA_ID_SEEKHEAD) {
1139 for (i = 0; i < matroska->num_level1_elems; i++) {
1140 if (matroska->level1_elems[i].id == id)
1141 return &matroska->level1_elems[i];
1145 // Only a completely broken file would have more elements.
1146 // It also provides a low-effort way to escape from circular seekheads
1147 // (every iteration will add a level1 entry).
1148 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1149 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1153 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1154 *elem = (MatroskaLevel1Element){.id = id};
1159 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1160 EbmlSyntax *syntax, void *data)
1162 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1165 // max. 16 MB for strings
1166 [EBML_STR] = 0x1000000,
1167 [EBML_UTF8] = 0x1000000,
1168 // max. 256 MB for binary data
1169 [EBML_BIN] = 0x10000000,
1170 // no limits for anything else
1172 AVIOContext *pb = matroska->ctx->pb;
1173 uint32_t id = syntax->id;
1177 MatroskaLevel1Element *level1_elem;
1179 data = (char *) data + syntax->data_offset;
1180 if (syntax->list_elem_size) {
1181 EbmlList *list = data;
1182 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1184 return AVERROR(ENOMEM);
1185 list->elem = newelem;
1186 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1187 memset(data, 0, syntax->list_elem_size);
1191 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1192 matroska->current_id = 0;
1193 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1195 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1196 av_log(matroska->ctx, AV_LOG_ERROR,
1197 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1198 length, max_lengths[syntax->type], syntax->type);
1199 return AVERROR_INVALIDDATA;
1201 if (matroska->num_levels > 0) {
1202 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1203 AVIOContext *pb = matroska->ctx->pb;
1204 int64_t pos = avio_tell(pb);
1206 if (length != EBML_UNKNOWN_LENGTH &&
1207 level->length != EBML_UNKNOWN_LENGTH) {
1208 uint64_t elem_end = pos + length,
1209 level_end = level->start + level->length;
1211 if (level_end < elem_end) {
1212 av_log(matroska->ctx, AV_LOG_ERROR,
1213 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1214 "containing master element ending at 0x%"PRIx64"\n",
1215 pos, elem_end, level_end);
1216 return AVERROR_INVALIDDATA;
1218 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1219 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1220 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1221 return AVERROR_INVALIDDATA;
1222 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1223 // According to the specifications only clusters and segments
1224 // are allowed to be unknown-sized.
1225 av_log(matroska->ctx, AV_LOG_ERROR,
1226 "Found unknown-sized element other than a cluster at "
1227 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1228 return AVERROR_INVALIDDATA;
1233 switch (syntax->type) {
1235 res = ebml_read_uint(pb, length, data);
1238 res = ebml_read_sint(pb, length, data);
1241 res = ebml_read_float(pb, length, data);
1245 res = ebml_read_ascii(pb, length, data);
1248 res = ebml_read_binary(pb, length, data);
1252 if ((res = ebml_read_master(matroska, length)) < 0)
1254 if (id == MATROSKA_ID_SEGMENT)
1255 matroska->segment_start = avio_tell(matroska->ctx->pb);
1256 if (id == MATROSKA_ID_CUES)
1257 matroska->cues_parsing_deferred = 0;
1258 if (syntax->type == EBML_LEVEL1 &&
1259 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1260 if (level1_elem->parsed)
1261 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1262 level1_elem->parsed = 1;
1264 return ebml_parse_nest(matroska, syntax->def.n, data);
1266 return ebml_parse_id(matroska, syntax->def.n, id, data);
1270 if (ffio_limit(pb, length) != length)
1271 return AVERROR(EIO);
1272 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1274 if (res == AVERROR_INVALIDDATA)
1275 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1276 else if (res == AVERROR(EIO))
1277 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1281 static void ebml_free(EbmlSyntax *syntax, void *data)
1284 for (i = 0; syntax[i].id; i++) {
1285 void *data_off = (char *) data + syntax[i].data_offset;
1286 switch (syntax[i].type) {
1292 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1296 if (syntax[i].list_elem_size) {
1297 EbmlList *list = data_off;
1298 char *ptr = list->elem;
1299 for (j = 0; j < list->nb_elem;
1300 j++, ptr += syntax[i].list_elem_size)
1301 ebml_free(syntax[i].def.n, ptr);
1302 av_freep(&list->elem);
1305 ebml_free(syntax[i].def.n, data_off);
1315 static int matroska_probe(const AVProbeData *p)
1318 int len_mask = 0x80, size = 1, n = 1, i;
1321 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1324 /* length of header */
1326 while (size <= 8 && !(total & len_mask)) {
1332 total &= (len_mask - 1);
1334 total = (total << 8) | p->buf[4 + n++];
1336 /* Does the probe data contain the whole header? */
1337 if (p->buf_size < 4 + size + total)
1340 /* The header should contain a known document type. For now,
1341 * we don't parse the whole header but simply check for the
1342 * availability of that array of characters inside the header.
1343 * Not fully fool-proof, but good enough. */
1344 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1345 size_t probelen = strlen(matroska_doctypes[i]);
1346 if (total < probelen)
1348 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1349 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1350 return AVPROBE_SCORE_MAX;
1353 // probably valid EBML header but no recognized doctype
1354 return AVPROBE_SCORE_EXTENSION;
1357 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1360 MatroskaTrack *tracks = matroska->tracks.elem;
1363 for (i = 0; i < matroska->tracks.nb_elem; i++)
1364 if (tracks[i].num == num)
1367 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1371 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1372 MatroskaTrack *track)
1374 MatroskaTrackEncoding *encodings = track->encodings.elem;
1375 uint8_t *data = *buf;
1376 int isize = *buf_size;
1377 uint8_t *pkt_data = NULL;
1378 uint8_t av_unused *newpktdata;
1379 int pkt_size = isize;
1383 if (pkt_size >= 10000000U)
1384 return AVERROR_INVALIDDATA;
1386 switch (encodings[0].compression.algo) {
1387 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1389 int header_size = encodings[0].compression.settings.size;
1390 uint8_t *header = encodings[0].compression.settings.data;
1392 if (header_size && !header) {
1393 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1400 pkt_size = isize + header_size;
1401 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1403 return AVERROR(ENOMEM);
1405 memcpy(pkt_data, header, header_size);
1406 memcpy(pkt_data + header_size, data, isize);
1410 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1412 olen = pkt_size *= 3;
1413 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1414 + AV_INPUT_BUFFER_PADDING_SIZE);
1416 result = AVERROR(ENOMEM);
1419 pkt_data = newpktdata;
1420 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1421 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1423 result = AVERROR_INVALIDDATA;
1430 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1432 z_stream zstream = { 0 };
1433 if (inflateInit(&zstream) != Z_OK)
1435 zstream.next_in = data;
1436 zstream.avail_in = isize;
1439 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1441 inflateEnd(&zstream);
1442 result = AVERROR(ENOMEM);
1445 pkt_data = newpktdata;
1446 zstream.avail_out = pkt_size - zstream.total_out;
1447 zstream.next_out = pkt_data + zstream.total_out;
1448 result = inflate(&zstream, Z_NO_FLUSH);
1449 } while (result == Z_OK && pkt_size < 10000000);
1450 pkt_size = zstream.total_out;
1451 inflateEnd(&zstream);
1452 if (result != Z_STREAM_END) {
1453 if (result == Z_MEM_ERROR)
1454 result = AVERROR(ENOMEM);
1456 result = AVERROR_INVALIDDATA;
1463 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1465 bz_stream bzstream = { 0 };
1466 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1468 bzstream.next_in = data;
1469 bzstream.avail_in = isize;
1472 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1474 BZ2_bzDecompressEnd(&bzstream);
1475 result = AVERROR(ENOMEM);
1478 pkt_data = newpktdata;
1479 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1480 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1481 result = BZ2_bzDecompress(&bzstream);
1482 } while (result == BZ_OK && pkt_size < 10000000);
1483 pkt_size = bzstream.total_out_lo32;
1484 BZ2_bzDecompressEnd(&bzstream);
1485 if (result != BZ_STREAM_END) {
1486 if (result == BZ_MEM_ERROR)
1487 result = AVERROR(ENOMEM);
1489 result = AVERROR_INVALIDDATA;
1496 return AVERROR_INVALIDDATA;
1499 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1502 *buf_size = pkt_size;
1510 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1511 AVDictionary **metadata, char *prefix)
1513 MatroskaTag *tags = list->elem;
1517 for (i = 0; i < list->nb_elem; i++) {
1518 const char *lang = tags[i].lang &&
1519 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1521 if (!tags[i].name) {
1522 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1526 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1528 av_strlcpy(key, tags[i].name, sizeof(key));
1529 if (tags[i].def || !lang) {
1530 av_dict_set(metadata, key, tags[i].string, 0);
1531 if (tags[i].sub.nb_elem)
1532 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1535 av_strlcat(key, "-", sizeof(key));
1536 av_strlcat(key, lang, sizeof(key));
1537 av_dict_set(metadata, key, tags[i].string, 0);
1538 if (tags[i].sub.nb_elem)
1539 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1542 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1545 static void matroska_convert_tags(AVFormatContext *s)
1547 MatroskaDemuxContext *matroska = s->priv_data;
1548 MatroskaTags *tags = matroska->tags.elem;
1551 for (i = 0; i < matroska->tags.nb_elem; i++) {
1552 if (tags[i].target.attachuid) {
1553 MatroskaAttachment *attachment = matroska->attachments.elem;
1555 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1556 if (attachment[j].uid == tags[i].target.attachuid &&
1557 attachment[j].stream) {
1558 matroska_convert_tag(s, &tags[i].tag,
1559 &attachment[j].stream->metadata, NULL);
1564 av_log(NULL, AV_LOG_WARNING,
1565 "The tags at index %d refer to a "
1566 "non-existent attachment %"PRId64".\n",
1567 i, tags[i].target.attachuid);
1569 } else if (tags[i].target.chapteruid) {
1570 MatroskaChapter *chapter = matroska->chapters.elem;
1572 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1573 if (chapter[j].uid == tags[i].target.chapteruid &&
1574 chapter[j].chapter) {
1575 matroska_convert_tag(s, &tags[i].tag,
1576 &chapter[j].chapter->metadata, NULL);
1581 av_log(NULL, AV_LOG_WARNING,
1582 "The tags at index %d refer to a non-existent chapter "
1584 i, tags[i].target.chapteruid);
1586 } else if (tags[i].target.trackuid) {
1587 MatroskaTrack *track = matroska->tracks.elem;
1589 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1590 if (track[j].uid == tags[i].target.trackuid &&
1592 matroska_convert_tag(s, &tags[i].tag,
1593 &track[j].stream->metadata, NULL);
1598 av_log(NULL, AV_LOG_WARNING,
1599 "The tags at index %d refer to a non-existent track "
1601 i, tags[i].target.trackuid);
1604 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1605 tags[i].target.type);
1610 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1613 uint32_t saved_id = matroska->current_id;
1614 int64_t before_pos = avio_tell(matroska->ctx->pb);
1615 MatroskaLevel level;
1620 offset = pos + matroska->segment_start;
1621 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1622 /* We don't want to lose our seekhead level, so we add
1623 * a dummy. This is a crude hack. */
1624 if (matroska->num_levels == EBML_MAX_DEPTH) {
1625 av_log(matroska->ctx, AV_LOG_INFO,
1626 "Max EBML element depth (%d) reached, "
1627 "cannot parse further.\n", EBML_MAX_DEPTH);
1628 ret = AVERROR_INVALIDDATA;
1631 level.length = EBML_UNKNOWN_LENGTH;
1632 matroska->levels[matroska->num_levels] = level;
1633 matroska->num_levels++;
1634 matroska->current_id = 0;
1636 ret = ebml_parse(matroska, matroska_segment, matroska);
1638 /* remove dummy level */
1639 while (matroska->num_levels) {
1640 uint64_t length = matroska->levels[--matroska->num_levels].length;
1641 if (length == EBML_UNKNOWN_LENGTH)
1647 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1648 matroska->current_id = saved_id;
1653 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1655 EbmlList *seekhead_list = &matroska->seekhead;
1658 // we should not do any seeking in the streaming case
1659 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1662 for (i = 0; i < seekhead_list->nb_elem; i++) {
1663 MatroskaSeekhead *seekheads = seekhead_list->elem;
1664 uint32_t id = seekheads[i].id;
1665 uint64_t pos = seekheads[i].pos;
1667 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1668 if (!elem || elem->parsed)
1673 // defer cues parsing until we actually need cue data.
1674 if (id == MATROSKA_ID_CUES)
1677 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1678 // mark index as broken
1679 matroska->cues_parsing_deferred = -1;
1687 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1689 EbmlList *index_list;
1690 MatroskaIndex *index;
1691 uint64_t index_scale = 1;
1694 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1697 index_list = &matroska->index;
1698 index = index_list->elem;
1699 if (index_list->nb_elem < 2)
1701 if (index[1].time > 1E14 / matroska->time_scale) {
1702 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1705 for (i = 0; i < index_list->nb_elem; i++) {
1706 EbmlList *pos_list = &index[i].pos;
1707 MatroskaIndexPos *pos = pos_list->elem;
1708 for (j = 0; j < pos_list->nb_elem; j++) {
1709 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1711 if (track && track->stream)
1712 av_add_index_entry(track->stream,
1713 pos[j].pos + matroska->segment_start,
1714 index[i].time / index_scale, 0, 0,
1720 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1723 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1726 for (i = 0; i < matroska->num_level1_elems; i++) {
1727 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1728 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1729 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1730 matroska->cues_parsing_deferred = -1;
1736 matroska_add_index_entries(matroska);
1739 static int matroska_aac_profile(char *codec_id)
1741 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1744 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1745 if (strstr(codec_id, aac_profiles[profile]))
1750 static int matroska_aac_sri(int samplerate)
1754 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1755 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1760 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1762 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1763 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1766 static int matroska_parse_flac(AVFormatContext *s,
1767 MatroskaTrack *track,
1770 AVStream *st = track->stream;
1771 uint8_t *p = track->codec_priv.data;
1772 int size = track->codec_priv.size;
1774 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1775 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1776 track->codec_priv.size = 0;
1780 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1782 p += track->codec_priv.size;
1783 size -= track->codec_priv.size;
1785 /* parse the remaining metadata blocks if present */
1787 int block_last, block_type, block_size;
1789 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1793 if (block_size > size)
1796 /* check for the channel mask */
1797 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1798 AVDictionary *dict = NULL;
1799 AVDictionaryEntry *chmask;
1801 ff_vorbis_comment(s, &dict, p, block_size, 0);
1802 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1804 uint64_t mask = strtol(chmask->value, NULL, 0);
1805 if (!mask || mask & ~0x3ffffULL) {
1806 av_log(s, AV_LOG_WARNING,
1807 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1809 st->codecpar->channel_layout = mask;
1811 av_dict_free(&dict);
1821 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1823 int major, minor, micro, bttb = 0;
1825 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1826 * this function, and fixed in 57.52 */
1827 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1828 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1830 switch (field_order) {
1831 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1832 return AV_FIELD_PROGRESSIVE;
1833 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1834 return AV_FIELD_UNKNOWN;
1835 case MATROSKA_VIDEO_FIELDORDER_TT:
1837 case MATROSKA_VIDEO_FIELDORDER_BB:
1839 case MATROSKA_VIDEO_FIELDORDER_BT:
1840 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1841 case MATROSKA_VIDEO_FIELDORDER_TB:
1842 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1844 return AV_FIELD_UNKNOWN;
1848 static void mkv_stereo_mode_display_mul(int stereo_mode,
1849 int *h_width, int *h_height)
1851 switch (stereo_mode) {
1852 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1853 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1854 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1855 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1856 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1858 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1859 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1860 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1861 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1864 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1865 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1866 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1867 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1873 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1874 const MatroskaTrackVideoColor *color = track->video.color.elem;
1875 const MatroskaMasteringMeta *mastering_meta;
1876 int has_mastering_primaries, has_mastering_luminance;
1878 if (!track->video.color.nb_elem)
1881 mastering_meta = &color->mastering_meta;
1882 // Mastering primaries are CIE 1931 coords, and must be > 0.
1883 has_mastering_primaries =
1884 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1885 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1886 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1887 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1888 has_mastering_luminance = mastering_meta->max_luminance > 0;
1890 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1891 st->codecpar->color_space = color->matrix_coefficients;
1892 if (color->primaries != AVCOL_PRI_RESERVED &&
1893 color->primaries != AVCOL_PRI_RESERVED0)
1894 st->codecpar->color_primaries = color->primaries;
1895 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1896 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1897 st->codecpar->color_trc = color->transfer_characteristics;
1898 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1899 color->range <= AVCOL_RANGE_JPEG)
1900 st->codecpar->color_range = color->range;
1901 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1902 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1903 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1904 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1905 st->codecpar->chroma_location =
1906 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1907 (color->chroma_siting_vert - 1) << 7);
1909 if (color->max_cll && color->max_fall) {
1912 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1914 return AVERROR(ENOMEM);
1915 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1916 (uint8_t *)metadata, size);
1918 av_freep(&metadata);
1921 metadata->MaxCLL = color->max_cll;
1922 metadata->MaxFALL = color->max_fall;
1925 if (has_mastering_primaries || has_mastering_luminance) {
1926 // Use similar rationals as other standards.
1927 const int chroma_den = 50000;
1928 const int luma_den = 10000;
1929 AVMasteringDisplayMetadata *metadata =
1930 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1931 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1932 sizeof(AVMasteringDisplayMetadata));
1934 return AVERROR(ENOMEM);
1936 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1937 if (has_mastering_primaries) {
1938 metadata->display_primaries[0][0] = av_make_q(
1939 round(mastering_meta->r_x * chroma_den), chroma_den);
1940 metadata->display_primaries[0][1] = av_make_q(
1941 round(mastering_meta->r_y * chroma_den), chroma_den);
1942 metadata->display_primaries[1][0] = av_make_q(
1943 round(mastering_meta->g_x * chroma_den), chroma_den);
1944 metadata->display_primaries[1][1] = av_make_q(
1945 round(mastering_meta->g_y * chroma_den), chroma_den);
1946 metadata->display_primaries[2][0] = av_make_q(
1947 round(mastering_meta->b_x * chroma_den), chroma_den);
1948 metadata->display_primaries[2][1] = av_make_q(
1949 round(mastering_meta->b_y * chroma_den), chroma_den);
1950 metadata->white_point[0] = av_make_q(
1951 round(mastering_meta->white_x * chroma_den), chroma_den);
1952 metadata->white_point[1] = av_make_q(
1953 round(mastering_meta->white_y * chroma_den), chroma_den);
1954 metadata->has_primaries = 1;
1956 if (has_mastering_luminance) {
1957 metadata->max_luminance = av_make_q(
1958 round(mastering_meta->max_luminance * luma_den), luma_den);
1959 metadata->min_luminance = av_make_q(
1960 round(mastering_meta->min_luminance * luma_den), luma_den);
1961 metadata->has_luminance = 1;
1967 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1968 AVSphericalMapping *spherical;
1969 enum AVSphericalProjection projection;
1970 size_t spherical_size;
1971 uint32_t l = 0, t = 0, r = 0, b = 0;
1972 uint32_t padding = 0;
1976 bytestream2_init(&gb, track->video.projection.private.data,
1977 track->video.projection.private.size);
1979 if (bytestream2_get_byte(&gb) != 0) {
1980 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1984 bytestream2_skip(&gb, 3); // flags
1986 switch (track->video.projection.type) {
1987 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1988 if (track->video.projection.private.size == 20) {
1989 t = bytestream2_get_be32(&gb);
1990 b = bytestream2_get_be32(&gb);
1991 l = bytestream2_get_be32(&gb);
1992 r = bytestream2_get_be32(&gb);
1994 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1995 av_log(NULL, AV_LOG_ERROR,
1996 "Invalid bounding rectangle coordinates "
1997 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1999 return AVERROR_INVALIDDATA;
2001 } else if (track->video.projection.private.size != 0) {
2002 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2003 return AVERROR_INVALIDDATA;
2006 if (l || t || r || b)
2007 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2009 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2011 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2012 if (track->video.projection.private.size < 4) {
2013 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2014 return AVERROR_INVALIDDATA;
2015 } else if (track->video.projection.private.size == 12) {
2016 uint32_t layout = bytestream2_get_be32(&gb);
2018 av_log(NULL, AV_LOG_WARNING,
2019 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2022 projection = AV_SPHERICAL_CUBEMAP;
2023 padding = bytestream2_get_be32(&gb);
2025 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2026 return AVERROR_INVALIDDATA;
2029 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2030 /* No Spherical metadata */
2033 av_log(NULL, AV_LOG_WARNING,
2034 "Unknown spherical metadata type %"PRIu64"\n",
2035 track->video.projection.type);
2039 spherical = av_spherical_alloc(&spherical_size);
2041 return AVERROR(ENOMEM);
2043 spherical->projection = projection;
2045 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2046 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2047 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2049 spherical->padding = padding;
2051 spherical->bound_left = l;
2052 spherical->bound_top = t;
2053 spherical->bound_right = r;
2054 spherical->bound_bottom = b;
2056 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2059 av_freep(&spherical);
2066 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2068 const AVCodecTag *codec_tags;
2070 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2071 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2073 /* Normalize noncompliant private data that starts with the fourcc
2074 * by expanding/shifting the data by 4 bytes and storing the data
2075 * size at the start. */
2076 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2077 int ret = av_buffer_realloc(&track->codec_priv.buf,
2078 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2082 track->codec_priv.data = track->codec_priv.buf->data;
2083 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2084 track->codec_priv.size += 4;
2085 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2088 *fourcc = AV_RL32(track->codec_priv.data + 4);
2089 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2094 static int matroska_parse_tracks(AVFormatContext *s)
2096 MatroskaDemuxContext *matroska = s->priv_data;
2097 MatroskaTrack *tracks = matroska->tracks.elem;
2102 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2103 MatroskaTrack *track = &tracks[i];
2104 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2105 EbmlList *encodings_list = &track->encodings;
2106 MatroskaTrackEncoding *encodings = encodings_list->elem;
2107 uint8_t *extradata = NULL;
2108 int extradata_size = 0;
2109 int extradata_offset = 0;
2110 uint32_t fourcc = 0;
2112 char* key_id_base64 = NULL;
2115 /* Apply some sanity checks. */
2116 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2117 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2118 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2119 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2120 av_log(matroska->ctx, AV_LOG_INFO,
2121 "Unknown or unsupported track type %"PRIu64"\n",
2125 if (!track->codec_id)
2128 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2129 isnan(track->audio.samplerate)) {
2130 av_log(matroska->ctx, AV_LOG_WARNING,
2131 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2132 track->audio.samplerate);
2133 track->audio.samplerate = 8000;
2136 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2137 if (!track->default_duration && track->video.frame_rate > 0) {
2138 double default_duration = 1000000000 / track->video.frame_rate;
2139 if (default_duration > UINT64_MAX || default_duration < 0) {
2140 av_log(matroska->ctx, AV_LOG_WARNING,
2141 "Invalid frame rate %e. Cannot calculate default duration.\n",
2142 track->video.frame_rate);
2144 track->default_duration = default_duration;
2147 if (track->video.display_width == -1)
2148 track->video.display_width = track->video.pixel_width;
2149 if (track->video.display_height == -1)
2150 track->video.display_height = track->video.pixel_height;
2151 if (track->video.color_space.size == 4)
2152 fourcc = AV_RL32(track->video.color_space.data);
2153 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2154 if (!track->audio.out_samplerate)
2155 track->audio.out_samplerate = track->audio.samplerate;
2157 if (encodings_list->nb_elem > 1) {
2158 av_log(matroska->ctx, AV_LOG_ERROR,
2159 "Multiple combined encodings not supported");
2160 } else if (encodings_list->nb_elem == 1) {
2161 if (encodings[0].type) {
2162 if (encodings[0].encryption.key_id.size > 0) {
2163 /* Save the encryption key id to be stored later as a
2165 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2166 key_id_base64 = av_malloc(b64_size);
2167 if (key_id_base64 == NULL)
2168 return AVERROR(ENOMEM);
2170 av_base64_encode(key_id_base64, b64_size,
2171 encodings[0].encryption.key_id.data,
2172 encodings[0].encryption.key_id.size);
2174 encodings[0].scope = 0;
2175 av_log(matroska->ctx, AV_LOG_ERROR,
2176 "Unsupported encoding type");
2180 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2183 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2186 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2188 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2189 encodings[0].scope = 0;
2190 av_log(matroska->ctx, AV_LOG_ERROR,
2191 "Unsupported encoding type");
2192 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2193 uint8_t *codec_priv = track->codec_priv.data;
2194 int ret = matroska_decode_buffer(&track->codec_priv.data,
2195 &track->codec_priv.size,
2198 track->codec_priv.data = NULL;
2199 track->codec_priv.size = 0;
2200 av_log(matroska->ctx, AV_LOG_ERROR,
2201 "Failed to decode codec private data\n");
2204 if (codec_priv != track->codec_priv.data) {
2205 av_buffer_unref(&track->codec_priv.buf);
2206 if (track->codec_priv.data) {
2207 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2208 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2210 if (!track->codec_priv.buf) {
2211 av_freep(&track->codec_priv.data);
2212 track->codec_priv.size = 0;
2213 return AVERROR(ENOMEM);
2220 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2221 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2222 strlen(ff_mkv_codec_tags[j].str))) {
2223 codec_id = ff_mkv_codec_tags[j].id;
2228 st = track->stream = avformat_new_stream(s, NULL);
2230 av_free(key_id_base64);
2231 return AVERROR(ENOMEM);
2234 if (key_id_base64) {
2235 /* export encryption key id as base64 metadata tag */
2236 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2237 av_freep(&key_id_base64);
2240 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2241 track->codec_priv.size >= 40 &&
2242 track->codec_priv.data) {
2243 track->ms_compat = 1;
2244 bit_depth = AV_RL16(track->codec_priv.data + 14);
2245 fourcc = AV_RL32(track->codec_priv.data + 16);
2246 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2249 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2251 extradata_offset = 40;
2252 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2253 track->codec_priv.size >= 14 &&
2254 track->codec_priv.data) {
2256 ffio_init_context(&b, track->codec_priv.data,
2257 track->codec_priv.size,
2258 0, NULL, NULL, NULL, NULL);
2259 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2262 codec_id = st->codecpar->codec_id;
2263 fourcc = st->codecpar->codec_tag;
2264 extradata_offset = FFMIN(track->codec_priv.size, 18);
2265 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2266 /* Normally 36, but allow noncompliant private data */
2267 && (track->codec_priv.size >= 32)
2268 && (track->codec_priv.data)) {
2269 uint16_t sample_size;
2270 int ret = get_qt_codec(track, &fourcc, &codec_id);
2273 sample_size = AV_RB16(track->codec_priv.data + 26);
2275 if (sample_size == 8) {
2276 fourcc = MKTAG('r','a','w',' ');
2277 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2278 } else if (sample_size == 16) {
2279 fourcc = MKTAG('t','w','o','s');
2280 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2283 if ((fourcc == MKTAG('t','w','o','s') ||
2284 fourcc == MKTAG('s','o','w','t')) &&
2286 codec_id = AV_CODEC_ID_PCM_S8;
2287 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2288 (track->codec_priv.size >= 21) &&
2289 (track->codec_priv.data)) {
2290 int ret = get_qt_codec(track, &fourcc, &codec_id);
2293 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2294 fourcc = MKTAG('S','V','Q','3');
2295 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2297 if (codec_id == AV_CODEC_ID_NONE)
2298 av_log(matroska->ctx, AV_LOG_ERROR,
2299 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2300 if (track->codec_priv.size >= 86) {
2301 bit_depth = AV_RB16(track->codec_priv.data + 82);
2302 ffio_init_context(&b, track->codec_priv.data,
2303 track->codec_priv.size,
2304 0, NULL, NULL, NULL, NULL);
2305 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2307 track->has_palette = 1;
2310 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2311 switch (track->audio.bitdepth) {
2313 codec_id = AV_CODEC_ID_PCM_U8;
2316 codec_id = AV_CODEC_ID_PCM_S24BE;
2319 codec_id = AV_CODEC_ID_PCM_S32BE;
2322 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2323 switch (track->audio.bitdepth) {
2325 codec_id = AV_CODEC_ID_PCM_U8;
2328 codec_id = AV_CODEC_ID_PCM_S24LE;
2331 codec_id = AV_CODEC_ID_PCM_S32LE;
2334 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2335 track->audio.bitdepth == 64) {
2336 codec_id = AV_CODEC_ID_PCM_F64LE;
2337 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2338 int profile = matroska_aac_profile(track->codec_id);
2339 int sri = matroska_aac_sri(track->audio.samplerate);
2340 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2342 return AVERROR(ENOMEM);
2343 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2344 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2345 if (strstr(track->codec_id, "SBR")) {
2346 sri = matroska_aac_sri(track->audio.out_samplerate);
2347 extradata[2] = 0x56;
2348 extradata[3] = 0xE5;
2349 extradata[4] = 0x80 | (sri << 3);
2353 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2354 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2355 * Create the "atom size", "tag", and "tag version" fields the
2356 * decoder expects manually. */
2357 extradata_size = 12 + track->codec_priv.size;
2358 extradata = av_mallocz(extradata_size +
2359 AV_INPUT_BUFFER_PADDING_SIZE);
2361 return AVERROR(ENOMEM);
2362 AV_WB32(extradata, extradata_size);
2363 memcpy(&extradata[4], "alac", 4);
2364 AV_WB32(&extradata[8], 0);
2365 memcpy(&extradata[12], track->codec_priv.data,
2366 track->codec_priv.size);
2367 } else if (codec_id == AV_CODEC_ID_TTA) {
2368 extradata_size = 30;
2369 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2371 return AVERROR(ENOMEM);
2372 ffio_init_context(&b, extradata, extradata_size, 1,
2373 NULL, NULL, NULL, NULL);
2374 avio_write(&b, "TTA1", 4);
2376 if (track->audio.channels > UINT16_MAX ||
2377 track->audio.bitdepth > UINT16_MAX) {
2378 av_log(matroska->ctx, AV_LOG_WARNING,
2379 "Too large audio channel number %"PRIu64
2380 " or bitdepth %"PRIu64". Skipping track.\n",
2381 track->audio.channels, track->audio.bitdepth);
2382 av_freep(&extradata);
2383 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2384 return AVERROR_INVALIDDATA;
2388 avio_wl16(&b, track->audio.channels);
2389 avio_wl16(&b, track->audio.bitdepth);
2390 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2391 return AVERROR_INVALIDDATA;
2392 avio_wl32(&b, track->audio.out_samplerate);
2393 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2394 track->audio.out_samplerate,
2395 AV_TIME_BASE * 1000));
2396 } else if (codec_id == AV_CODEC_ID_RV10 ||
2397 codec_id == AV_CODEC_ID_RV20 ||
2398 codec_id == AV_CODEC_ID_RV30 ||
2399 codec_id == AV_CODEC_ID_RV40) {
2400 extradata_offset = 26;
2401 } else if (codec_id == AV_CODEC_ID_RA_144) {
2402 track->audio.out_samplerate = 8000;
2403 track->audio.channels = 1;
2404 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2405 codec_id == AV_CODEC_ID_COOK ||
2406 codec_id == AV_CODEC_ID_ATRAC3 ||
2407 codec_id == AV_CODEC_ID_SIPR)
2408 && track->codec_priv.data) {
2411 ffio_init_context(&b, track->codec_priv.data,
2412 track->codec_priv.size,
2413 0, NULL, NULL, NULL, NULL);
2415 flavor = avio_rb16(&b);
2416 track->audio.coded_framesize = avio_rb32(&b);
2418 track->audio.sub_packet_h = avio_rb16(&b);
2419 track->audio.frame_size = avio_rb16(&b);
2420 track->audio.sub_packet_size = avio_rb16(&b);
2422 track->audio.coded_framesize <= 0 ||
2423 track->audio.sub_packet_h <= 0 ||
2424 track->audio.frame_size <= 0 ||
2425 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2426 return AVERROR_INVALIDDATA;
2427 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2428 track->audio.frame_size);
2429 if (!track->audio.buf)
2430 return AVERROR(ENOMEM);
2431 if (codec_id == AV_CODEC_ID_RA_288) {
2432 st->codecpar->block_align = track->audio.coded_framesize;
2433 track->codec_priv.size = 0;
2435 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2436 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2437 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2438 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2440 st->codecpar->block_align = track->audio.sub_packet_size;
2441 extradata_offset = 78;
2443 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2444 ret = matroska_parse_flac(s, track, &extradata_offset);
2447 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2448 fourcc = AV_RL32(track->codec_priv.data);
2449 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2450 /* we don't need any value stored in CodecPrivate.
2451 make sure that it's not exported as extradata. */
2452 track->codec_priv.size = 0;
2453 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2454 /* For now, propagate only the OBUs, if any. Once libavcodec is
2455 updated to handle isobmff style extradata this can be removed. */
2456 extradata_offset = 4;
2458 track->codec_priv.size -= extradata_offset;
2460 if (codec_id == AV_CODEC_ID_NONE)
2461 av_log(matroska->ctx, AV_LOG_INFO,
2462 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2464 if (track->time_scale < 0.01)
2465 track->time_scale = 1.0;
2466 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2467 1000 * 1000 * 1000); /* 64 bit pts in ns */
2469 /* convert the delay from ns to the track timebase */
2470 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2471 (AVRational){ 1, 1000000000 },
2474 st->codecpar->codec_id = codec_id;
2476 if (strcmp(track->language, "und"))
2477 av_dict_set(&st->metadata, "language", track->language, 0);
2478 av_dict_set(&st->metadata, "title", track->name, 0);
2480 if (track->flag_default)
2481 st->disposition |= AV_DISPOSITION_DEFAULT;
2482 if (track->flag_forced)
2483 st->disposition |= AV_DISPOSITION_FORCED;
2485 if (!st->codecpar->extradata) {
2487 st->codecpar->extradata = extradata;
2488 st->codecpar->extradata_size = extradata_size;
2489 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2490 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2491 return AVERROR(ENOMEM);
2492 memcpy(st->codecpar->extradata,
2493 track->codec_priv.data + extradata_offset,
2494 track->codec_priv.size);
2498 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2499 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2500 int display_width_mul = 1;
2501 int display_height_mul = 1;
2503 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2504 st->codecpar->codec_tag = fourcc;
2506 st->codecpar->bits_per_coded_sample = bit_depth;
2507 st->codecpar->width = track->video.pixel_width;
2508 st->codecpar->height = track->video.pixel_height;
2510 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2511 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2512 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2513 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2515 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2516 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2518 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2519 av_reduce(&st->sample_aspect_ratio.num,
2520 &st->sample_aspect_ratio.den,
2521 st->codecpar->height * track->video.display_width * display_width_mul,
2522 st->codecpar->width * track->video.display_height * display_height_mul,
2525 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2526 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2528 if (track->default_duration) {
2529 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2530 1000000000, track->default_duration, 30000);
2531 #if FF_API_R_FRAME_RATE
2532 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2533 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2534 st->r_frame_rate = st->avg_frame_rate;
2538 /* export stereo mode flag as metadata tag */
2539 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2540 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2542 /* export alpha mode flag as metadata tag */
2543 if (track->video.alpha_mode)
2544 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2546 /* if we have virtual track, mark the real tracks */
2547 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2549 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2551 snprintf(buf, sizeof(buf), "%s_%d",
2552 ff_matroska_video_stereo_plane[planes[j].type], i);
2553 for (k=0; k < matroska->tracks.nb_elem; k++)
2554 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2555 av_dict_set(&tracks[k].stream->metadata,
2556 "stereo_mode", buf, 0);
2560 // add stream level stereo3d side data if it is a supported format
2561 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2562 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2563 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2568 ret = mkv_parse_video_color(st, track);
2571 ret = mkv_parse_video_projection(st, track);
2574 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2575 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2576 st->codecpar->codec_tag = fourcc;
2577 st->codecpar->sample_rate = track->audio.out_samplerate;
2578 st->codecpar->channels = track->audio.channels;
2579 if (!st->codecpar->bits_per_coded_sample)
2580 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2581 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2582 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2583 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2584 st->need_parsing = AVSTREAM_PARSE_FULL;
2585 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2586 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2587 if (track->codec_delay > 0) {
2588 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2589 (AVRational){1, 1000000000},
2590 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2591 48000 : st->codecpar->sample_rate});
2593 if (track->seek_preroll > 0) {
2594 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2595 (AVRational){1, 1000000000},
2596 (AVRational){1, st->codecpar->sample_rate});
2598 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2599 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2601 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2602 st->disposition |= AV_DISPOSITION_CAPTIONS;
2603 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2604 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2605 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2606 st->disposition |= AV_DISPOSITION_METADATA;
2608 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2609 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2610 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2611 matroska->contains_ssa = 1;
2618 static int matroska_read_header(AVFormatContext *s)
2620 MatroskaDemuxContext *matroska = s->priv_data;
2621 EbmlList *attachments_list = &matroska->attachments;
2622 EbmlList *chapters_list = &matroska->chapters;
2623 MatroskaAttachment *attachments;
2624 MatroskaChapter *chapters;
2625 uint64_t max_start = 0;
2631 matroska->cues_parsing_deferred = 1;
2633 /* First read the EBML header. */
2634 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2635 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2636 ebml_free(ebml_syntax, &ebml);
2637 return AVERROR_INVALIDDATA;
2639 if (ebml.version > EBML_VERSION ||
2640 ebml.max_size > sizeof(uint64_t) ||
2641 ebml.id_length > sizeof(uint32_t) ||
2642 ebml.doctype_version > 3) {
2643 avpriv_report_missing_feature(matroska->ctx,
2644 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2645 ebml.version, ebml.doctype, ebml.doctype_version);
2646 ebml_free(ebml_syntax, &ebml);
2647 return AVERROR_PATCHWELCOME;
2648 } else if (ebml.doctype_version == 3) {
2649 av_log(matroska->ctx, AV_LOG_WARNING,
2650 "EBML header using unsupported features\n"
2651 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2652 ebml.version, ebml.doctype, ebml.doctype_version);
2654 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2655 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2657 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2658 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2659 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2660 ebml_free(ebml_syntax, &ebml);
2661 return AVERROR_INVALIDDATA;
2664 ebml_free(ebml_syntax, &ebml);
2666 /* The next thing is a segment. */
2667 pos = avio_tell(matroska->ctx->pb);
2668 res = ebml_parse(matroska, matroska_segments, matroska);
2669 // try resyncing until we find a EBML_STOP type element.
2671 res = matroska_resync(matroska, pos);
2674 pos = avio_tell(matroska->ctx->pb);
2675 res = ebml_parse(matroska, matroska_segment, matroska);
2677 matroska_execute_seekhead(matroska);
2679 if (!matroska->time_scale)
2680 matroska->time_scale = 1000000;
2681 if (matroska->duration)
2682 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2683 1000 / AV_TIME_BASE;
2684 av_dict_set(&s->metadata, "title", matroska->title, 0);
2685 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2687 if (matroska->date_utc.size == 8)
2688 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2690 res = matroska_parse_tracks(s);
2694 attachments = attachments_list->elem;
2695 for (j = 0; j < attachments_list->nb_elem; j++) {
2696 if (!(attachments[j].filename && attachments[j].mime &&
2697 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2698 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2700 AVStream *st = avformat_new_stream(s, NULL);
2703 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2704 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2705 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2707 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2708 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2709 strlen(ff_mkv_image_mime_tags[i].str))) {
2710 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2715 attachments[j].stream = st;
2717 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2718 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2719 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2721 av_init_packet(&st->attached_pic);
2722 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2724 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2725 st->attached_pic.stream_index = st->index;
2726 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2728 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2729 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2731 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2732 attachments[j].bin.size);
2734 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2735 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2736 strlen(ff_mkv_mime_tags[i].str))) {
2737 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2745 chapters = chapters_list->elem;
2746 for (i = 0; i < chapters_list->nb_elem; i++)
2747 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2748 (max_start == 0 || chapters[i].start > max_start)) {
2749 chapters[i].chapter =
2750 avpriv_new_chapter(s, chapters[i].uid,
2751 (AVRational) { 1, 1000000000 },
2752 chapters[i].start, chapters[i].end,
2754 if (chapters[i].chapter) {
2755 av_dict_set(&chapters[i].chapter->metadata,
2756 "title", chapters[i].title, 0);
2758 max_start = chapters[i].start;
2761 matroska_add_index_entries(matroska);
2763 matroska_convert_tags(s);
2767 matroska_read_close(s);
2772 * Put one packet in an application-supplied AVPacket struct.
2773 * Returns 0 on success or -1 on failure.
2775 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2778 if (matroska->queue) {
2779 MatroskaTrack *tracks = matroska->tracks.elem;
2780 MatroskaTrack *track;
2782 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2783 track = &tracks[pkt->stream_index];
2784 if (track->has_palette) {
2785 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2787 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2789 memcpy(pal, track->palette, AVPALETTE_SIZE);
2791 track->has_palette = 0;
2800 * Free all packets in our internal queue.
2802 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2804 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2807 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2808 int *buf_size, int type,
2809 uint32_t **lace_buf, int *laces)
2811 int res = 0, n, size = *buf_size;
2812 uint8_t *data = *buf;
2813 uint32_t *lace_size;
2817 *lace_buf = av_mallocz(sizeof(int));
2819 return AVERROR(ENOMEM);
2821 *lace_buf[0] = size;
2825 av_assert0(size > 0);
2829 lace_size = av_mallocz(*laces * sizeof(int));
2831 return AVERROR(ENOMEM);
2834 case 0x1: /* Xiph lacing */
2838 for (n = 0; res == 0 && n < *laces - 1; n++) {
2840 if (size <= total) {
2841 res = AVERROR_INVALIDDATA;
2846 lace_size[n] += temp;
2853 if (size <= total) {
2854 res = AVERROR_INVALIDDATA;
2858 lace_size[n] = size - total;
2862 case 0x2: /* fixed-size lacing */
2863 if (size % (*laces)) {
2864 res = AVERROR_INVALIDDATA;
2867 for (n = 0; n < *laces; n++)
2868 lace_size[n] = size / *laces;
2871 case 0x3: /* EBML lacing */
2875 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2876 if (n < 0 || num > INT_MAX) {
2877 av_log(matroska->ctx, AV_LOG_INFO,
2878 "EBML block data error\n");
2879 res = n<0 ? n : AVERROR_INVALIDDATA;
2884 total = lace_size[0] = num;
2885 for (n = 1; res == 0 && n < *laces - 1; n++) {
2888 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2889 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2890 av_log(matroska->ctx, AV_LOG_INFO,
2891 "EBML block data error\n");
2892 res = r<0 ? r : AVERROR_INVALIDDATA;
2897 lace_size[n] = lace_size[n - 1] + snum;
2898 total += lace_size[n];
2900 if (size <= total) {
2901 res = AVERROR_INVALIDDATA;
2904 lace_size[*laces - 1] = size - total;
2910 *lace_buf = lace_size;
2916 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2917 MatroskaTrack *track, AVStream *st,
2918 uint8_t *data, int size, uint64_t timecode,
2921 int a = st->codecpar->block_align;
2922 int sps = track->audio.sub_packet_size;
2923 int cfs = track->audio.coded_framesize;
2924 int h = track->audio.sub_packet_h;
2925 int y = track->audio.sub_packet_cnt;
2926 int w = track->audio.frame_size;
2929 if (!track->audio.pkt_cnt) {
2930 if (track->audio.sub_packet_cnt == 0)
2931 track->audio.buf_timecode = timecode;
2932 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2933 if (size < cfs * h / 2) {
2934 av_log(matroska->ctx, AV_LOG_ERROR,
2935 "Corrupt int4 RM-style audio packet size\n");
2936 return AVERROR_INVALIDDATA;
2938 for (x = 0; x < h / 2; x++)
2939 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2940 data + x * cfs, cfs);
2941 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2943 av_log(matroska->ctx, AV_LOG_ERROR,
2944 "Corrupt sipr RM-style audio packet size\n");
2945 return AVERROR_INVALIDDATA;
2947 memcpy(track->audio.buf + y * w, data, w);
2949 if (size < sps * w / sps || h<=0 || w%sps) {
2950 av_log(matroska->ctx, AV_LOG_ERROR,
2951 "Corrupt generic RM-style audio packet size\n");
2952 return AVERROR_INVALIDDATA;
2954 for (x = 0; x < w / sps; x++)
2955 memcpy(track->audio.buf +
2956 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2957 data + x * sps, sps);
2960 if (++track->audio.sub_packet_cnt >= h) {
2961 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2962 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2963 track->audio.sub_packet_cnt = 0;
2964 track->audio.pkt_cnt = h * w / a;
2968 while (track->audio.pkt_cnt) {
2970 AVPacket pktl, *pkt = &pktl;
2972 ret = av_new_packet(pkt, a);
2977 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2979 pkt->pts = track->audio.buf_timecode;
2980 track->audio.buf_timecode = AV_NOPTS_VALUE;
2982 pkt->stream_index = st->index;
2983 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2985 av_packet_unref(pkt);
2986 return AVERROR(ENOMEM);
2993 /* reconstruct full wavpack blocks from mangled matroska ones */
2994 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2995 uint8_t **pdst, int *size)
2997 uint8_t *dst = NULL;
3002 int ret, offset = 0;
3004 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3005 return AVERROR_INVALIDDATA;
3007 ver = AV_RL16(track->stream->codecpar->extradata);
3009 samples = AV_RL32(src);
3013 while (srclen >= 8) {
3018 uint32_t flags = AV_RL32(src);
3019 uint32_t crc = AV_RL32(src + 4);
3023 multiblock = (flags & 0x1800) != 0x1800;
3026 ret = AVERROR_INVALIDDATA;
3029 blocksize = AV_RL32(src);
3035 if (blocksize > srclen) {
3036 ret = AVERROR_INVALIDDATA;
3040 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3042 ret = AVERROR(ENOMEM);
3046 dstlen += blocksize + 32;
3048 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3049 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3050 AV_WL16(dst + offset + 8, ver); // version
3051 AV_WL16(dst + offset + 10, 0); // track/index_no
3052 AV_WL32(dst + offset + 12, 0); // total samples
3053 AV_WL32(dst + offset + 16, 0); // block index
3054 AV_WL32(dst + offset + 20, samples); // number of samples
3055 AV_WL32(dst + offset + 24, flags); // flags
3056 AV_WL32(dst + offset + 28, crc); // crc
3057 memcpy(dst + offset + 32, src, blocksize); // block data
3060 srclen -= blocksize;
3061 offset += blocksize + 32;
3064 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3076 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3077 uint8_t **pdst, int *size)
3082 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3083 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3085 return AVERROR(ENOMEM);
3087 AV_WB32(dst, dstlen);
3088 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3089 memcpy(dst + 8, src, dstlen);
3090 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3100 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3101 MatroskaTrack *track,
3103 uint8_t *data, int data_len,
3108 AVPacket pktl, *pkt = &pktl;
3109 uint8_t *id, *settings, *text, *buf;
3110 int id_len, settings_len, text_len;
3115 return AVERROR_INVALIDDATA;
3118 q = data + data_len;
3123 if (*p == '\r' || *p == '\n') {
3132 if (p >= q || *p != '\n')
3133 return AVERROR_INVALIDDATA;
3139 if (*p == '\r' || *p == '\n') {
3140 settings_len = p - settings;
3148 if (p >= q || *p != '\n')
3149 return AVERROR_INVALIDDATA;
3154 while (text_len > 0) {
3155 const int len = text_len - 1;
3156 const uint8_t c = p[len];
3157 if (c != '\r' && c != '\n')
3163 return AVERROR_INVALIDDATA;
3165 err = av_new_packet(pkt, text_len);
3170 memcpy(pkt->data, text, text_len);
3173 buf = av_packet_new_side_data(pkt,
3174 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3177 av_packet_unref(pkt);
3178 return AVERROR(ENOMEM);
3180 memcpy(buf, id, id_len);
3183 if (settings_len > 0) {
3184 buf = av_packet_new_side_data(pkt,
3185 AV_PKT_DATA_WEBVTT_SETTINGS,
3188 av_packet_unref(pkt);
3189 return AVERROR(ENOMEM);
3191 memcpy(buf, settings, settings_len);
3194 // Do we need this for subtitles?
3195 // pkt->flags = AV_PKT_FLAG_KEY;
3197 pkt->stream_index = st->index;
3198 pkt->pts = timecode;
3200 // Do we need this for subtitles?
3201 // pkt->dts = timecode;
3203 pkt->duration = duration;
3206 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3208 av_packet_unref(pkt);
3209 return AVERROR(ENOMEM);
3215 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3216 MatroskaTrack *track, AVStream *st,
3217 AVBufferRef *buf, uint8_t *data, int pkt_size,
3218 uint64_t timecode, uint64_t lace_duration,
3219 int64_t pos, int is_keyframe,
3220 uint8_t *additional, uint64_t additional_id, int additional_size,
3221 int64_t discard_padding)
3223 MatroskaTrackEncoding *encodings = track->encodings.elem;
3224 uint8_t *pkt_data = data;
3226 AVPacket pktl, *pkt = &pktl;
3228 if (encodings && !encodings->type && encodings->scope & 1) {
3229 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3234 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3236 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3238 av_log(matroska->ctx, AV_LOG_ERROR,
3239 "Error parsing a wavpack block.\n");
3242 if (pkt_data != data)
3243 av_freep(&pkt_data);
3247 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3249 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3251 av_log(matroska->ctx, AV_LOG_ERROR,
3252 "Error parsing a prores block.\n");
3255 if (pkt_data != data)
3256 av_freep(&pkt_data);
3260 av_init_packet(pkt);
3261 if (pkt_data != data)
3262 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3265 pkt->buf = av_buffer_ref(buf);
3268 res = AVERROR(ENOMEM);
3272 pkt->data = pkt_data;
3273 pkt->size = pkt_size;
3274 pkt->flags = is_keyframe;
3275 pkt->stream_index = st->index;
3277 if (additional_size > 0) {
3278 uint8_t *side_data = av_packet_new_side_data(pkt,
3279 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3280 additional_size + 8);
3282 av_packet_unref(pkt);
3283 return AVERROR(ENOMEM);
3285 AV_WB64(side_data, additional_id);
3286 memcpy(side_data + 8, additional, additional_size);
3289 if (discard_padding) {
3290 uint8_t *side_data = av_packet_new_side_data(pkt,
3291 AV_PKT_DATA_SKIP_SAMPLES,
3294 av_packet_unref(pkt);
3295 return AVERROR(ENOMEM);
3297 discard_padding = av_rescale_q(discard_padding,
3298 (AVRational){1, 1000000000},
3299 (AVRational){1, st->codecpar->sample_rate});
3300 if (discard_padding > 0) {
3301 AV_WL32(side_data + 4, discard_padding);
3303 AV_WL32(side_data, -discard_padding);
3307 if (track->ms_compat)
3308 pkt->dts = timecode;
3310 pkt->pts = timecode;
3312 pkt->duration = lace_duration;
3314 #if FF_API_CONVERGENCE_DURATION
3315 FF_DISABLE_DEPRECATION_WARNINGS
3316 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3317 pkt->convergence_duration = lace_duration;
3319 FF_ENABLE_DEPRECATION_WARNINGS
3322 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3324 av_packet_unref(pkt);
3325 return AVERROR(ENOMEM);
3331 if (pkt_data != data)
3332 av_freep(&pkt_data);
3336 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3337 int size, int64_t pos, uint64_t cluster_time,
3338 uint64_t block_duration, int is_keyframe,
3339 uint8_t *additional, uint64_t additional_id, int additional_size,
3340 int64_t cluster_pos, int64_t discard_padding)
3342 uint64_t timecode = AV_NOPTS_VALUE;
3343 MatroskaTrack *track;
3347 uint32_t *lace_size = NULL;
3348 int n, flags, laces = 0;
3350 int trust_default_duration = 1;
3352 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3353 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3359 track = matroska_find_track_by_num(matroska, num);
3360 if (!track || !track->stream) {
3361 av_log(matroska->ctx, AV_LOG_INFO,
3362 "Invalid stream %"PRIu64"\n", num);
3363 return AVERROR_INVALIDDATA;
3364 } else if (size <= 3)
3367 if (st->discard >= AVDISCARD_ALL)
3369 av_assert1(block_duration != AV_NOPTS_VALUE);
3371 block_time = sign_extend(AV_RB16(data), 16);
3375 if (is_keyframe == -1)
3376 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3378 if (cluster_time != (uint64_t) -1 &&
3379 (block_time >= 0 || cluster_time >= -block_time)) {
3380 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3381 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3382 timecode < track->end_timecode)
3383 is_keyframe = 0; /* overlapping subtitles are not key frame */
3385 ff_reduce_index(matroska->ctx, st->index);
3386 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3391 if (matroska->skip_to_keyframe &&
3392 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3393 // Compare signed timecodes. Timecode may be negative due to codec delay
3394 // offset. We don't support timestamps greater than int64_t anyway - see
3396 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3399 matroska->skip_to_keyframe = 0;
3400 else if (!st->skip_to_keyframe) {
3401 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3402 matroska->skip_to_keyframe = 0;
3406 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3407 &lace_size, &laces);
3412 if (track->audio.samplerate == 8000) {
3413 // If this is needed for more codecs, then add them here
3414 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3415 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3416 trust_default_duration = 0;
3420 if (!block_duration && trust_default_duration)
3421 block_duration = track->default_duration * laces / matroska->time_scale;
3423 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3424 track->end_timecode =
3425 FFMAX(track->end_timecode, timecode + block_duration);
3427 for (n = 0; n < laces; n++) {
3428 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3430 if (lace_size[n] > size) {
3431 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3435 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3436 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3437 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3438 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3439 st->codecpar->block_align && track->audio.sub_packet_size) {
3440 res = matroska_parse_rm_audio(matroska, track, st, data,
3446 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3447 res = matroska_parse_webvtt(matroska, track, st,
3449 timecode, lace_duration,
3454 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3455 timecode, lace_duration, pos,
3456 !n ? is_keyframe : 0,
3457 additional, additional_id, additional_size,
3463 if (timecode != AV_NOPTS_VALUE)
3464 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3465 data += lace_size[n];
3466 size -= lace_size[n];
3474 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3476 EbmlList *blocks_list;
3477 MatroskaBlock *blocks;
3479 res = ebml_parse(matroska,
3480 matroska_cluster_incremental_parsing,
3481 &matroska->current_cluster);
3484 if (matroska->current_cluster_pos)
3485 ebml_level_end(matroska);
3486 ebml_free(matroska_cluster, &matroska->current_cluster);
3487 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3488 matroska->current_cluster_num_blocks = 0;
3489 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3490 /* sizeof the ID which was already read */
3491 if (matroska->current_id)
3492 matroska->current_cluster_pos -= 4;
3493 res = ebml_parse(matroska,
3494 matroska_clusters_incremental,
3495 &matroska->current_cluster);
3496 /* Try parsing the block again. */
3498 res = ebml_parse(matroska,
3499 matroska_cluster_incremental_parsing,
3500 &matroska->current_cluster);
3504 matroska->current_cluster_num_blocks <
3505 matroska->current_cluster.blocks.nb_elem) {
3506 blocks_list = &matroska->current_cluster.blocks;
3507 blocks = blocks_list->elem;
3509 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3510 i = blocks_list->nb_elem - 1;
3511 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3512 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3513 uint8_t* additional = blocks[i].additional.size > 0 ?
3514 blocks[i].additional.data : NULL;
3515 if (!blocks[i].non_simple)
3516 blocks[i].duration = 0;
3517 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3518 blocks[i].bin.size, blocks[i].bin.pos,
3519 matroska->current_cluster.timecode,
3520 blocks[i].duration, is_keyframe,
3521 additional, blocks[i].additional_id,
3522 blocks[i].additional.size,
3523 matroska->current_cluster_pos,
3524 blocks[i].discard_padding);
3531 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3533 MatroskaCluster cluster = { 0 };
3534 EbmlList *blocks_list;
3535 MatroskaBlock *blocks;
3539 if (!matroska->contains_ssa)
3540 return matroska_parse_cluster_incremental(matroska);
3541 pos = avio_tell(matroska->ctx->pb);
3542 if (matroska->current_id)
3543 pos -= 4; /* sizeof the ID which was already read */
3544 res = ebml_parse(matroska, matroska_clusters, &cluster);
3545 blocks_list = &cluster.blocks;
3546 blocks = blocks_list->elem;
3547 for (i = 0; i < blocks_list->nb_elem; i++)
3548 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3549 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3550 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3551 blocks[i].bin.size, blocks[i].bin.pos,
3552 cluster.timecode, blocks[i].duration,
3553 is_keyframe, NULL, 0, 0, pos,
3554 blocks[i].discard_padding);
3556 ebml_free(matroska_cluster, &cluster);
3560 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3562 MatroskaDemuxContext *matroska = s->priv_data;
3565 while (matroska_deliver_packet(matroska, pkt)) {
3566 int64_t pos = avio_tell(matroska->ctx->pb);
3568 return (ret < 0) ? ret : AVERROR_EOF;
3569 if (matroska_parse_cluster(matroska) < 0)
3570 ret = matroska_resync(matroska, pos);
3576 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3577 int64_t timestamp, int flags)
3579 MatroskaDemuxContext *matroska = s->priv_data;
3580 MatroskaTrack *tracks = NULL;
3581 AVStream *st = s->streams[stream_index];
3584 /* Parse the CUES now since we need the index data to seek. */
3585 if (matroska->cues_parsing_deferred > 0) {
3586 matroska->cues_parsing_deferred = 0;
3587 matroska_parse_cues(matroska);
3590 if (!st->nb_index_entries)
3592 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3594 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3595 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3597 matroska->current_id = 0;
3598 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3599 matroska_clear_queue(matroska);
3600 if (matroska_parse_cluster(matroska) < 0)
3605 matroska_clear_queue(matroska);
3606 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3609 tracks = matroska->tracks.elem;
3610 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3611 tracks[i].audio.pkt_cnt = 0;
3612 tracks[i].audio.sub_packet_cnt = 0;
3613 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3614 tracks[i].end_timecode = 0;
3617 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
3618 matroska->current_id = 0;
3619 if (flags & AVSEEK_FLAG_ANY) {
3620 st->skip_to_keyframe = 0;
3621 matroska->skip_to_timecode = timestamp;
3623 st->skip_to_keyframe = 1;
3624 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3626 matroska->skip_to_keyframe = 1;
3628 matroska->num_levels = 0;
3629 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3632 // slightly hackish but allows proper fallback to
3633 // the generic seeking code.
3634 matroska_clear_queue(matroska);
3635 matroska->current_id = 0;
3636 st->skip_to_keyframe =
3637 matroska->skip_to_keyframe = 0;
3639 matroska->num_levels = 0;
3643 static int matroska_read_close(AVFormatContext *s)
3645 MatroskaDemuxContext *matroska = s->priv_data;
3646 MatroskaTrack *tracks = matroska->tracks.elem;
3649 matroska_clear_queue(matroska);
3651 for (n = 0; n < matroska->tracks.nb_elem; n++)
3652 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3653 av_freep(&tracks[n].audio.buf);
3654 ebml_free(matroska_cluster, &matroska->current_cluster);
3655 ebml_free(matroska_segment, matroska);
3661 int64_t start_time_ns;
3662 int64_t end_time_ns;
3663 int64_t start_offset;
3667 /* This function searches all the Cues and returns the CueDesc corresponding to
3668 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3669 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3671 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3672 MatroskaDemuxContext *matroska = s->priv_data;
3675 int nb_index_entries = s->streams[0]->nb_index_entries;
3676 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3677 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3678 for (i = 1; i < nb_index_entries; i++) {
3679 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3680 index_entries[i].timestamp * matroska->time_scale > ts) {
3685 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3686 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3687 if (i != nb_index_entries - 1) {
3688 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3689 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3691 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3692 // FIXME: this needs special handling for files where Cues appear
3693 // before Clusters. the current logic assumes Cues appear after
3695 cue_desc.end_offset = cues_start - matroska->segment_start;
3700 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3702 MatroskaDemuxContext *matroska = s->priv_data;
3703 int64_t cluster_pos, before_pos;
3705 if (s->streams[0]->nb_index_entries <= 0) return 0;
3706 // seek to the first cluster using cues.
3707 index = av_index_search_timestamp(s->streams[0], 0, 0);
3708 if (index < 0) return 0;
3709 cluster_pos = s->streams[0]->index_entries[index].pos;
3710 before_pos = avio_tell(s->pb);
3712 int64_t cluster_id = 0, cluster_length = 0;
3714 avio_seek(s->pb, cluster_pos, SEEK_SET);
3715 // read cluster id and length
3716 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3717 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3718 if (cluster_id != 0xF43B675) { // done with all clusters
3721 avio_seek(s->pb, cluster_pos, SEEK_SET);
3722 matroska->current_id = 0;
3723 matroska_clear_queue(matroska);
3724 if (matroska_parse_cluster(matroska) < 0 ||
3728 pkt = &matroska->queue->pkt;
3729 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3730 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3735 avio_seek(s->pb, before_pos, SEEK_SET);
3739 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3740 double min_buffer, double* buffer,
3741 double* sec_to_download, AVFormatContext *s,
3744 double nano_seconds_per_second = 1000000000.0;
3745 double time_sec = time_ns / nano_seconds_per_second;
3747 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3748 int64_t end_time_ns = time_ns + time_to_search_ns;
3749 double sec_downloaded = 0.0;
3750 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3751 if (desc_curr.start_time_ns == -1)
3753 *sec_to_download = 0.0;
3755 // Check for non cue start time.
3756 if (time_ns > desc_curr.start_time_ns) {
3757 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3758 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3759 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3760 double timeToDownload = (cueBytes * 8.0) / bps;
3762 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3763 *sec_to_download += timeToDownload;
3765 // Check if the search ends within the first cue.
3766 if (desc_curr.end_time_ns >= end_time_ns) {
3767 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3768 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3769 sec_downloaded = percent_to_sub * sec_downloaded;
3770 *sec_to_download = percent_to_sub * *sec_to_download;
3773 if ((sec_downloaded + *buffer) <= min_buffer) {
3777 // Get the next Cue.
3778 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3781 while (desc_curr.start_time_ns != -1) {
3782 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3783 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3784 double desc_sec = desc_ns / nano_seconds_per_second;
3785 double bits = (desc_bytes * 8.0);
3786 double time_to_download = bits / bps;
3788 sec_downloaded += desc_sec - time_to_download;
3789 *sec_to_download += time_to_download;
3791 if (desc_curr.end_time_ns >= end_time_ns) {
3792 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3793 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3794 sec_downloaded = percent_to_sub * sec_downloaded;
3795 *sec_to_download = percent_to_sub * *sec_to_download;
3797 if ((sec_downloaded + *buffer) <= min_buffer)
3802 if ((sec_downloaded + *buffer) <= min_buffer) {
3807 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3809 *buffer = *buffer + sec_downloaded;
3813 /* This function computes the bandwidth of the WebM file with the help of
3814 * buffer_size_after_time_downloaded() function. Both of these functions are
3815 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3816 * Matroska parsing mechanism.
3818 * Returns the bandwidth of the file on success; -1 on error.
3820 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3822 MatroskaDemuxContext *matroska = s->priv_data;
3823 AVStream *st = s->streams[0];
3824 double bandwidth = 0.0;
3827 for (i = 0; i < st->nb_index_entries; i++) {
3828 int64_t prebuffer_ns = 1000000000;
3829 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3830 double nano_seconds_per_second = 1000000000.0;
3831 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3832 double prebuffer_bytes = 0.0;
3833 int64_t temp_prebuffer_ns = prebuffer_ns;
3834 int64_t pre_bytes, pre_ns;
3835 double pre_sec, prebuffer, bits_per_second;
3836 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3838 // Start with the first Cue.
3839 CueDesc desc_end = desc_beg;
3841 // Figure out how much data we have downloaded for the prebuffer. This will
3842 // be used later to adjust the bits per sample to try.
3843 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3844 // Prebuffered the entire Cue.
3845 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3846 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3847 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3849 if (desc_end.start_time_ns == -1) {
3850 // The prebuffer is larger than the duration.
3851 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3853 bits_per_second = 0.0;
3855 // The prebuffer ends in the last Cue. Estimate how much data was
3857 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3858 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3859 pre_sec = pre_ns / nano_seconds_per_second;
3861 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3863 prebuffer = prebuffer_ns / nano_seconds_per_second;
3865 // Set this to 0.0 in case our prebuffer buffers the entire video.
3866 bits_per_second = 0.0;
3868 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3869 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3870 double desc_sec = desc_ns / nano_seconds_per_second;
3871 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3873 // Drop the bps by the percentage of bytes buffered.
3874 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3875 double mod_bits_per_second = calc_bits_per_second * percent;
3877 if (prebuffer < desc_sec) {
3879 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3881 // Add 1 so the bits per second should be a little bit greater than file
3883 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3884 const double min_buffer = 0.0;
3885 double buffer = prebuffer;
3886 double sec_to_download = 0.0;
3888 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3889 min_buffer, &buffer, &sec_to_download,
3893 } else if (rv == 0) {
3894 bits_per_second = (double)(bps);
3899 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3900 } while (desc_end.start_time_ns != -1);
3902 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3904 return (int64_t)bandwidth;
3907 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3909 MatroskaDemuxContext *matroska = s->priv_data;
3910 EbmlList *seekhead_list = &matroska->seekhead;
3911 MatroskaSeekhead *seekhead = seekhead_list->elem;
3913 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3917 // determine cues start and end positions
3918 for (i = 0; i < seekhead_list->nb_elem; i++)
3919 if (seekhead[i].id == MATROSKA_ID_CUES)
3922 if (i >= seekhead_list->nb_elem) return -1;
3924 before_pos = avio_tell(matroska->ctx->pb);
3925 cues_start = seekhead[i].pos + matroska->segment_start;
3926 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3927 // cues_end is computed as cues_start + cues_length + length of the
3928 // Cues element ID + EBML length of the Cues element. cues_end is
3929 // inclusive and the above sum is reduced by 1.
3930 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3931 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3932 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3933 cues_end = cues_start + cues_length + bytes_read - 1;
3935 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3936 if (cues_start == -1 || cues_end == -1) return -1;
3939 matroska_parse_cues(matroska);
3942 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3945 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3947 // if the file has cues at the start, fix up the init range so tht
3948 // it does not include it
3949 if (cues_start <= init_range)
3950 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3953 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3954 if (bandwidth < 0) return -1;
3955 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3957 // check if all clusters start with key frames
3958 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3960 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3961 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3962 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3963 if (!buf) return -1;
3965 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3966 int ret = snprintf(buf + end, 20,
3967 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3968 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3969 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3970 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3972 return AVERROR_INVALIDDATA;
3976 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3982 static int webm_dash_manifest_read_header(AVFormatContext *s)
3985 int ret = matroska_read_header(s);
3987 MatroskaTrack *tracks;
3988 MatroskaDemuxContext *matroska = s->priv_data;
3990 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3993 if (!s->nb_streams) {
3994 matroska_read_close(s);
3995 av_log(s, AV_LOG_ERROR, "No streams found\n");
3996 return AVERROR_INVALIDDATA;
3999 if (!matroska->is_live) {
4000 buf = av_asprintf("%g", matroska->duration);
4001 if (!buf) return AVERROR(ENOMEM);
4002 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4005 // initialization range
4006 // 5 is the offset of Cluster ID.
4007 init_range = avio_tell(s->pb) - 5;
4008 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4011 // basename of the file
4012 buf = strrchr(s->url, '/');
4013 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4016 tracks = matroska->tracks.elem;
4017 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4019 // parse the cues and populate Cue related fields
4020 if (!matroska->is_live) {
4021 ret = webm_dash_manifest_cues(s, init_range);
4023 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4028 // use the bandwidth from the command line if it was provided
4029 if (matroska->bandwidth > 0) {
4030 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4031 matroska->bandwidth, 0);
4036 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4041 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4042 static const AVOption options[] = {
4043 { "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 },
4044 { "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 },
4048 static const AVClass webm_dash_class = {
4049 .class_name = "WebM DASH Manifest demuxer",
4050 .item_name = av_default_item_name,
4052 .version = LIBAVUTIL_VERSION_INT,
4055 AVInputFormat ff_matroska_demuxer = {
4056 .name = "matroska,webm",
4057 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4058 .extensions = "mkv,mk3d,mka,mks",
4059 .priv_data_size = sizeof(MatroskaDemuxContext),
4060 .read_probe = matroska_probe,
4061 .read_header = matroska_read_header,
4062 .read_packet = matroska_read_packet,
4063 .read_close = matroska_read_close,
4064 .read_seek = matroska_read_seek,
4065 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4068 AVInputFormat ff_webm_dash_manifest_demuxer = {
4069 .name = "webm_dash_manifest",
4070 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4071 .priv_data_size = sizeof(MatroskaDemuxContext),
4072 .read_header = webm_dash_manifest_read_header,
4073 .read_packet = webm_dash_manifest_read_packet,
4074 .read_close = matroska_read_close,
4075 .priv_class = &webm_dash_class,