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 */
87 typedef const struct EbmlSyntax {
97 const struct EbmlSyntax *n;
101 typedef struct EbmlList {
106 typedef struct EbmlBin {
113 typedef struct Ebml {
118 uint64_t doctype_version;
121 typedef struct MatroskaTrackCompression {
124 } MatroskaTrackCompression;
126 typedef struct MatroskaTrackEncryption {
129 } MatroskaTrackEncryption;
131 typedef struct MatroskaTrackEncoding {
134 MatroskaTrackCompression compression;
135 MatroskaTrackEncryption encryption;
136 } MatroskaTrackEncoding;
138 typedef struct MatroskaMasteringMeta {
147 double max_luminance;
148 double min_luminance;
149 } MatroskaMasteringMeta;
151 typedef struct MatroskaTrackVideoColor {
152 uint64_t matrix_coefficients;
153 uint64_t bits_per_channel;
154 uint64_t chroma_sub_horz;
155 uint64_t chroma_sub_vert;
156 uint64_t cb_sub_horz;
157 uint64_t cb_sub_vert;
158 uint64_t chroma_siting_horz;
159 uint64_t chroma_siting_vert;
161 uint64_t transfer_characteristics;
165 MatroskaMasteringMeta mastering_meta;
166 } MatroskaTrackVideoColor;
168 typedef struct MatroskaTrackVideoProjection {
174 } MatroskaTrackVideoProjection;
176 typedef struct MatroskaTrackVideo {
178 uint64_t display_width;
179 uint64_t display_height;
180 uint64_t pixel_width;
181 uint64_t pixel_height;
183 uint64_t display_unit;
185 uint64_t field_order;
186 uint64_t stereo_mode;
189 MatroskaTrackVideoProjection projection;
190 } MatroskaTrackVideo;
192 typedef struct MatroskaTrackAudio {
194 double out_samplerate;
198 /* real audio header (extracted from extradata) */
205 uint64_t buf_timecode;
207 } MatroskaTrackAudio;
209 typedef struct MatroskaTrackPlane {
212 } MatroskaTrackPlane;
214 typedef struct MatroskaTrackOperation {
215 EbmlList combine_planes;
216 } MatroskaTrackOperation;
218 typedef struct MatroskaTrack {
227 uint64_t default_duration;
228 uint64_t flag_default;
229 uint64_t flag_forced;
230 uint64_t seek_preroll;
231 MatroskaTrackVideo video;
232 MatroskaTrackAudio audio;
233 MatroskaTrackOperation operation;
235 uint64_t codec_delay;
236 uint64_t codec_delay_in_track_tb;
239 int64_t end_timecode;
241 uint64_t max_block_additional_id;
243 uint32_t palette[AVPALETTE_COUNT];
247 typedef struct MatroskaAttachment {
254 } MatroskaAttachment;
256 typedef struct MatroskaChapter {
265 typedef struct MatroskaIndexPos {
270 typedef struct MatroskaIndex {
275 typedef struct MatroskaTag {
283 typedef struct MatroskaTagTarget {
291 typedef struct MatroskaTags {
292 MatroskaTagTarget target;
296 typedef struct MatroskaSeekhead {
301 typedef struct MatroskaLevel {
306 typedef struct MatroskaBlock {
311 uint64_t additional_id;
313 int64_t discard_padding;
316 typedef struct MatroskaCluster {
322 typedef struct MatroskaLevel1Element {
326 } MatroskaLevel1Element;
328 typedef struct MatroskaDemuxContext {
329 const AVClass *class;
330 AVFormatContext *ctx;
334 MatroskaLevel levels[EBML_MAX_DEPTH];
343 EbmlList attachments;
349 /* byte position of the segment inside the stream */
350 int64_t segment_start;
352 /* the packet queue */
354 AVPacketList *queue_end;
358 /* What to skip before effectively reading a packet. */
359 int skip_to_keyframe;
360 uint64_t skip_to_timecode;
362 /* File has a CUES element, but we defer parsing until it is needed. */
363 int cues_parsing_deferred;
365 /* Level1 elements and whether they were read yet */
366 MatroskaLevel1Element level1_elems[64];
367 int num_level1_elems;
369 MatroskaCluster current_cluster;
371 /* WebM DASH Manifest live flag */
374 /* Bandwidth value for WebM DASH Manifest */
376 } MatroskaDemuxContext;
378 static const EbmlSyntax ebml_header[] = {
379 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
380 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
381 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
382 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
383 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
384 { EBML_ID_EBMLVERSION, EBML_NONE },
385 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
389 static const EbmlSyntax ebml_syntax[] = {
390 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
394 static const EbmlSyntax matroska_info[] = {
395 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
396 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
397 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
398 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
399 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
400 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
401 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
405 static const EbmlSyntax matroska_mastering_meta[] = {
406 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
407 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
408 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
419 static const EbmlSyntax matroska_track_video_color[] = {
420 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
421 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
422 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
423 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
427 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
428 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
429 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
430 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
432 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
433 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
437 static const EbmlSyntax matroska_track_video_projection[] = {
438 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
439 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
440 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
441 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
446 static const EbmlSyntax matroska_track_video[] = {
447 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
448 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
449 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
450 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
451 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
452 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
453 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
454 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
455 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
456 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
457 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
458 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
460 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
461 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
462 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
463 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
464 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
468 static const EbmlSyntax matroska_track_audio[] = {
469 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
470 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
471 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
472 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
476 static const EbmlSyntax matroska_track_encoding_compression[] = {
477 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
478 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
482 static const EbmlSyntax matroska_track_encoding_encryption[] = {
483 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
484 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
485 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
486 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
487 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
492 static const EbmlSyntax matroska_track_encoding[] = {
493 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
494 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
495 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
496 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
497 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
501 static const EbmlSyntax matroska_track_encodings[] = {
502 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
506 static const EbmlSyntax matroska_track_plane[] = {
507 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
508 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
512 static const EbmlSyntax matroska_track_combine_planes[] = {
513 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
517 static const EbmlSyntax matroska_track_operation[] = {
518 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
522 static const EbmlSyntax matroska_track[] = {
523 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
524 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
525 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
526 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
527 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
528 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
529 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
530 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
531 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
532 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
533 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
534 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
535 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
536 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
537 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
538 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
539 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
540 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
541 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
542 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
543 { MATROSKA_ID_CODECNAME, EBML_NONE },
544 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
545 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
546 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
547 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
548 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
552 static const EbmlSyntax matroska_tracks[] = {
553 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
557 static const EbmlSyntax matroska_attachment[] = {
558 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
559 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
560 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
561 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
562 { MATROSKA_ID_FILEDESC, EBML_NONE },
566 static const EbmlSyntax matroska_attachments[] = {
567 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
571 static const EbmlSyntax matroska_chapter_display[] = {
572 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
573 { MATROSKA_ID_CHAPLANG, EBML_NONE },
574 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
578 static const EbmlSyntax matroska_chapter_entry[] = {
579 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
580 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
581 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
582 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
583 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
584 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
585 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
586 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
590 static const EbmlSyntax matroska_chapter[] = {
591 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
592 { MATROSKA_ID_EDITIONUID, EBML_NONE },
593 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
594 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
599 static const EbmlSyntax matroska_chapters[] = {
600 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
604 static const EbmlSyntax matroska_index_pos[] = {
605 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
606 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
607 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
608 { MATROSKA_ID_CUEDURATION, EBML_NONE },
609 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
613 static const EbmlSyntax matroska_index_entry[] = {
614 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
615 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
619 static const EbmlSyntax matroska_index[] = {
620 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
624 static const EbmlSyntax matroska_simpletag[] = {
625 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
626 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
627 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
628 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
629 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
630 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
634 static const EbmlSyntax matroska_tagtargets[] = {
635 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
636 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
637 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
638 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
639 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
643 static const EbmlSyntax matroska_tag[] = {
644 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
645 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
649 static const EbmlSyntax matroska_tags[] = {
650 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
654 static const EbmlSyntax matroska_seekhead_entry[] = {
655 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
656 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
660 static const EbmlSyntax matroska_seekhead[] = {
661 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
665 static const EbmlSyntax matroska_segment[] = {
666 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
667 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
668 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
669 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
670 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
671 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
672 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
673 { MATROSKA_ID_CLUSTER, EBML_STOP },
677 static const EbmlSyntax matroska_segments[] = {
678 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
682 static const EbmlSyntax matroska_blockmore[] = {
683 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
684 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
688 static const EbmlSyntax matroska_blockadditions[] = {
689 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
693 static const EbmlSyntax matroska_blockgroup[] = {
694 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
695 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
696 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
697 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
698 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
699 { MATROSKA_ID_CODECSTATE, EBML_NONE },
700 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
704 static const EbmlSyntax matroska_cluster_parsing[] = {
705 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
706 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
707 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
708 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
709 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
710 { MATROSKA_ID_INFO, EBML_NONE },
711 { MATROSKA_ID_CUES, EBML_NONE },
712 { MATROSKA_ID_TAGS, EBML_NONE },
713 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
714 { MATROSKA_ID_CLUSTER, EBML_STOP },
718 static const EbmlSyntax matroska_cluster[] = {
719 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
720 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
721 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
722 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
723 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
727 static const EbmlSyntax matroska_clusters[] = {
728 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
729 { MATROSKA_ID_INFO, EBML_NONE },
730 { MATROSKA_ID_CUES, EBML_NONE },
731 { MATROSKA_ID_TAGS, EBML_NONE },
732 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
736 static const char *const matroska_doctypes[] = { "matroska", "webm" };
738 static int matroska_read_close(AVFormatContext *s);
740 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
742 AVIOContext *pb = matroska->ctx->pb;
745 matroska->current_id = 0;
746 matroska->num_levels = 0;
748 /* seek to next position to resync from */
749 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
756 // try to find a toplevel element
757 while (!avio_feof(pb)) {
758 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
759 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
760 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
761 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
762 matroska->current_id = id;
765 id = (id << 8) | avio_r8(pb);
773 * Return: Whether we reached the end of a level in the hierarchy or not.
775 static int ebml_level_end(MatroskaDemuxContext *matroska)
777 AVIOContext *pb = matroska->ctx->pb;
778 int64_t pos = avio_tell(pb);
780 if (matroska->num_levels > 0) {
781 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
782 if (pos - level->start >= level->length || matroska->current_id) {
783 matroska->num_levels--;
787 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
791 * Read: an "EBML number", which is defined as a variable-length
792 * array of bytes. The first byte indicates the length by giving a
793 * number of 0-bits followed by a one. The position of the first
794 * "one" bit inside the first byte indicates the length of this
796 * Returns: number of bytes read, < 0 on error
798 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
799 int max_size, uint64_t *number, int eof_forbidden)
805 /* The first byte tells us the length in bytes - except when it is zero. */
810 /* get the length of the EBML number */
811 read = 8 - ff_log2_tab[total];
813 if (!total || read > max_size) {
814 pos = avio_tell(pb) - 1;
816 av_log(matroska->ctx, AV_LOG_ERROR,
817 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
818 "of an EBML number\n", pos, pos);
820 av_log(matroska->ctx, AV_LOG_ERROR,
821 "Length %d indicated by an EBML number's first byte 0x%02x "
822 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
823 read, (uint8_t) total, pos, pos, max_size);
825 return AVERROR_INVALIDDATA;
828 /* read out length */
829 total ^= 1 << ff_log2_tab[total];
831 total = (total << 8) | avio_r8(pb);
833 if (pb->eof_reached) {
845 av_log(matroska->ctx, AV_LOG_ERROR,
846 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
851 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
852 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
859 * Read a EBML length value.
860 * This needs special handling for the "unknown length" case which has multiple
863 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
866 int res = ebml_read_num(matroska, pb, 8, number, 1);
867 if (res > 0 && *number + 1 == 1ULL << (7 * res))
868 *number = EBML_UNKNOWN_LENGTH;
873 * Read the next element as an unsigned int.
874 * 0 is success, < 0 is failure.
876 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
880 /* big-endian ordering; build up number */
883 *num = (*num << 8) | avio_r8(pb);
889 * Read the next element as a signed int.
890 * 0 is success, < 0 is failure.
892 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
899 *num = sign_extend(avio_r8(pb), 8);
901 /* big-endian ordering; build up number */
903 *num = ((uint64_t)*num << 8) | avio_r8(pb);
910 * Read the next element as a float.
911 * 0 is success, < 0 is failure.
913 static int ebml_read_float(AVIOContext *pb, int size, double *num)
918 *num = av_int2float(avio_rb32(pb));
920 *num = av_int2double(avio_rb64(pb));
922 return AVERROR_INVALIDDATA;
928 * Read the next element as an ASCII string.
929 * 0 is success, < 0 is failure.
931 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
935 /* EBML strings are usually not 0-terminated, so we allocate one
936 * byte more, read the string and NULL-terminate it ourselves. */
937 if (!(res = av_malloc(size + 1)))
938 return AVERROR(ENOMEM);
939 if (avio_read(pb, (uint8_t *) res, size) != size) {
951 * Read the next element as binary data.
952 * 0 is success, < 0 is failure.
954 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
958 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
961 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
963 bin->data = bin->buf->data;
965 bin->pos = avio_tell(pb);
966 if (avio_read(pb, bin->data, length) != length) {
967 av_buffer_unref(&bin->buf);
977 * Read the next element, but only the header. The contents
978 * are supposed to be sub-elements which can be read separately.
979 * 0 is success, < 0 is failure.
981 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
983 AVIOContext *pb = matroska->ctx->pb;
984 MatroskaLevel *level;
986 if (matroska->num_levels >= EBML_MAX_DEPTH) {
987 av_log(matroska->ctx, AV_LOG_ERROR,
988 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
989 return AVERROR(ENOSYS);
992 level = &matroska->levels[matroska->num_levels++];
993 level->start = avio_tell(pb);
994 level->length = length;
1000 * Read signed/unsigned "EBML" numbers.
1001 * Return: number of bytes processed, < 0 on error
1003 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1004 uint8_t *data, uint32_t size, uint64_t *num)
1007 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1008 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1012 * Same as above, but signed.
1014 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1015 uint8_t *data, uint32_t size, int64_t *num)
1020 /* read as unsigned number first */
1021 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1024 /* make signed (weird way) */
1025 *num = unum - ((1LL << (7 * res - 1)) - 1);
1030 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1031 EbmlSyntax *syntax, void *data);
1033 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1034 uint32_t id, void *data)
1037 for (i = 0; syntax[i].id; i++)
1038 if (id == syntax[i].id)
1040 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1041 matroska->num_levels > 0 &&
1042 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1043 return 0; // we reached the end of an unknown size cluster
1044 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1045 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1047 return ebml_parse_elem(matroska, &syntax[i], data);
1050 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1053 if (!matroska->current_id) {
1055 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id, 0);
1057 // in live mode, finish parsing if EOF is reached.
1058 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1059 res == AVERROR_EOF) ? 1 : res;
1061 matroska->current_id = id | 1 << 7 * res;
1063 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1066 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1071 for (i = 0; syntax[i].id; i++)
1072 switch (syntax[i].type) {
1074 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1077 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1080 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1084 // the default may be NULL
1085 if (syntax[i].def.s) {
1086 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1087 *dst = av_strdup(syntax[i].def.s);
1089 return AVERROR(ENOMEM);
1094 while (!res && !ebml_level_end(matroska))
1095 res = ebml_parse(matroska, syntax, data);
1100 static int is_ebml_id_valid(uint32_t id)
1102 // Due to endian nonsense in Matroska, the highest byte with any bits set
1103 // will contain the leading length bit. This bit in turn identifies the
1104 // total byte length of the element by its position within the byte.
1105 unsigned int bits = av_log2(id);
1106 return id && (bits + 7) / 8 == (8 - bits % 8);
1110 * Allocate and return the entry for the level1 element with the given ID. If
1111 * an entry already exists, return the existing entry.
1113 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1117 MatroskaLevel1Element *elem;
1119 if (!is_ebml_id_valid(id))
1122 // Some files link to all clusters; useless.
1123 if (id == MATROSKA_ID_CLUSTER)
1126 // There can be multiple seekheads.
1127 if (id != MATROSKA_ID_SEEKHEAD) {
1128 for (i = 0; i < matroska->num_level1_elems; i++) {
1129 if (matroska->level1_elems[i].id == id)
1130 return &matroska->level1_elems[i];
1134 // Only a completely broken file would have more elements.
1135 // It also provides a low-effort way to escape from circular seekheads
1136 // (every iteration will add a level1 entry).
1137 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1138 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1142 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1143 *elem = (MatroskaLevel1Element){.id = id};
1148 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1149 EbmlSyntax *syntax, void *data)
1151 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1155 // max. 16 MB for strings
1156 [EBML_STR] = 0x1000000,
1157 [EBML_UTF8] = 0x1000000,
1158 // max. 256 MB for binary data
1159 [EBML_BIN] = 0x10000000,
1160 // no limits for anything else
1162 AVIOContext *pb = matroska->ctx->pb;
1163 uint32_t id = syntax->id;
1167 MatroskaLevel1Element *level1_elem;
1169 data = (char *) data + syntax->data_offset;
1170 if (syntax->list_elem_size) {
1171 EbmlList *list = data;
1172 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1174 return AVERROR(ENOMEM);
1175 list->elem = newelem;
1176 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1177 memset(data, 0, syntax->list_elem_size);
1181 if (syntax->type != EBML_STOP) {
1182 matroska->current_id = 0;
1183 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1185 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1186 av_log(matroska->ctx, AV_LOG_ERROR,
1187 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1188 length, max_lengths[syntax->type], syntax->type);
1189 return AVERROR_INVALIDDATA;
1191 if (matroska->num_levels > 0) {
1192 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1193 AVIOContext *pb = matroska->ctx->pb;
1194 int64_t pos = avio_tell(pb);
1196 if (length != EBML_UNKNOWN_LENGTH &&
1197 level->length != EBML_UNKNOWN_LENGTH) {
1198 uint64_t elem_end = pos + length,
1199 level_end = level->start + level->length;
1201 if (level_end < elem_end) {
1202 av_log(matroska->ctx, AV_LOG_ERROR,
1203 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1204 "containing master element ending at 0x%"PRIx64"\n",
1205 pos, elem_end, level_end);
1206 return AVERROR_INVALIDDATA;
1208 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1209 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1210 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1211 return AVERROR_INVALIDDATA;
1212 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1213 // According to the specifications only clusters and segments
1214 // are allowed to be unknown-sized.
1215 av_log(matroska->ctx, AV_LOG_ERROR,
1216 "Found unknown-sized element other than a cluster at "
1217 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1218 return AVERROR_INVALIDDATA;
1223 switch (syntax->type) {
1225 res = ebml_read_uint(pb, length, data);
1228 res = ebml_read_sint(pb, length, data);
1231 res = ebml_read_float(pb, length, data);
1235 res = ebml_read_ascii(pb, length, data);
1238 res = ebml_read_binary(pb, length, data);
1242 if ((res = ebml_read_master(matroska, length)) < 0)
1244 if (id == MATROSKA_ID_SEGMENT)
1245 matroska->segment_start = avio_tell(matroska->ctx->pb);
1246 if (id == MATROSKA_ID_CUES)
1247 matroska->cues_parsing_deferred = 0;
1248 if (syntax->type == EBML_LEVEL1 &&
1249 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1250 if (level1_elem->parsed)
1251 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1252 level1_elem->parsed = 1;
1254 return ebml_parse_nest(matroska, syntax->def.n, data);
1258 if (ffio_limit(pb, length) != length)
1259 return AVERROR(EIO);
1260 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1262 if (res == AVERROR_INVALIDDATA)
1263 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1264 else if (res == AVERROR(EIO))
1265 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1269 static void ebml_free(EbmlSyntax *syntax, void *data)
1272 for (i = 0; syntax[i].id; i++) {
1273 void *data_off = (char *) data + syntax[i].data_offset;
1274 switch (syntax[i].type) {
1280 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1284 if (syntax[i].list_elem_size) {
1285 EbmlList *list = data_off;
1286 char *ptr = list->elem;
1287 for (j = 0; j < list->nb_elem;
1288 j++, ptr += syntax[i].list_elem_size)
1289 ebml_free(syntax[i].def.n, ptr);
1290 av_freep(&list->elem);
1293 ebml_free(syntax[i].def.n, data_off);
1303 static int matroska_probe(const AVProbeData *p)
1306 int len_mask = 0x80, size = 1, n = 1, i;
1309 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1312 /* length of header */
1314 while (size <= 8 && !(total & len_mask)) {
1320 total &= (len_mask - 1);
1322 total = (total << 8) | p->buf[4 + n++];
1324 /* Does the probe data contain the whole header? */
1325 if (p->buf_size < 4 + size + total)
1328 /* The header should contain a known document type. For now,
1329 * we don't parse the whole header but simply check for the
1330 * availability of that array of characters inside the header.
1331 * Not fully fool-proof, but good enough. */
1332 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1333 size_t probelen = strlen(matroska_doctypes[i]);
1334 if (total < probelen)
1336 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1337 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1338 return AVPROBE_SCORE_MAX;
1341 // probably valid EBML header but no recognized doctype
1342 return AVPROBE_SCORE_EXTENSION;
1345 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1348 MatroskaTrack *tracks = matroska->tracks.elem;
1351 for (i = 0; i < matroska->tracks.nb_elem; i++)
1352 if (tracks[i].num == num)
1355 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1359 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1360 MatroskaTrack *track)
1362 MatroskaTrackEncoding *encodings = track->encodings.elem;
1363 uint8_t *data = *buf;
1364 int isize = *buf_size;
1365 uint8_t *pkt_data = NULL;
1366 uint8_t av_unused *newpktdata;
1367 int pkt_size = isize;
1371 if (pkt_size >= 10000000U)
1372 return AVERROR_INVALIDDATA;
1374 switch (encodings[0].compression.algo) {
1375 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1377 int header_size = encodings[0].compression.settings.size;
1378 uint8_t *header = encodings[0].compression.settings.data;
1380 if (header_size && !header) {
1381 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1388 pkt_size = isize + header_size;
1389 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1391 return AVERROR(ENOMEM);
1393 memcpy(pkt_data, header, header_size);
1394 memcpy(pkt_data + header_size, data, isize);
1398 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1400 olen = pkt_size *= 3;
1401 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1402 + AV_INPUT_BUFFER_PADDING_SIZE);
1404 result = AVERROR(ENOMEM);
1407 pkt_data = newpktdata;
1408 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1409 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1411 result = AVERROR_INVALIDDATA;
1418 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1420 z_stream zstream = { 0 };
1421 if (inflateInit(&zstream) != Z_OK)
1423 zstream.next_in = data;
1424 zstream.avail_in = isize;
1427 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1429 inflateEnd(&zstream);
1430 result = AVERROR(ENOMEM);
1433 pkt_data = newpktdata;
1434 zstream.avail_out = pkt_size - zstream.total_out;
1435 zstream.next_out = pkt_data + zstream.total_out;
1436 result = inflate(&zstream, Z_NO_FLUSH);
1437 } while (result == Z_OK && pkt_size < 10000000);
1438 pkt_size = zstream.total_out;
1439 inflateEnd(&zstream);
1440 if (result != Z_STREAM_END) {
1441 if (result == Z_MEM_ERROR)
1442 result = AVERROR(ENOMEM);
1444 result = AVERROR_INVALIDDATA;
1451 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1453 bz_stream bzstream = { 0 };
1454 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1456 bzstream.next_in = data;
1457 bzstream.avail_in = isize;
1460 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1462 BZ2_bzDecompressEnd(&bzstream);
1463 result = AVERROR(ENOMEM);
1466 pkt_data = newpktdata;
1467 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1468 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1469 result = BZ2_bzDecompress(&bzstream);
1470 } while (result == BZ_OK && pkt_size < 10000000);
1471 pkt_size = bzstream.total_out_lo32;
1472 BZ2_bzDecompressEnd(&bzstream);
1473 if (result != BZ_STREAM_END) {
1474 if (result == BZ_MEM_ERROR)
1475 result = AVERROR(ENOMEM);
1477 result = AVERROR_INVALIDDATA;
1484 return AVERROR_INVALIDDATA;
1487 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1490 *buf_size = pkt_size;
1498 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1499 AVDictionary **metadata, char *prefix)
1501 MatroskaTag *tags = list->elem;
1505 for (i = 0; i < list->nb_elem; i++) {
1506 const char *lang = tags[i].lang &&
1507 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1509 if (!tags[i].name) {
1510 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1514 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1516 av_strlcpy(key, tags[i].name, sizeof(key));
1517 if (tags[i].def || !lang) {
1518 av_dict_set(metadata, key, tags[i].string, 0);
1519 if (tags[i].sub.nb_elem)
1520 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1523 av_strlcat(key, "-", sizeof(key));
1524 av_strlcat(key, lang, sizeof(key));
1525 av_dict_set(metadata, key, tags[i].string, 0);
1526 if (tags[i].sub.nb_elem)
1527 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1530 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1533 static void matroska_convert_tags(AVFormatContext *s)
1535 MatroskaDemuxContext *matroska = s->priv_data;
1536 MatroskaTags *tags = matroska->tags.elem;
1539 for (i = 0; i < matroska->tags.nb_elem; i++) {
1540 if (tags[i].target.attachuid) {
1541 MatroskaAttachment *attachment = matroska->attachments.elem;
1543 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1544 if (attachment[j].uid == tags[i].target.attachuid &&
1545 attachment[j].stream) {
1546 matroska_convert_tag(s, &tags[i].tag,
1547 &attachment[j].stream->metadata, NULL);
1552 av_log(NULL, AV_LOG_WARNING,
1553 "The tags at index %d refer to a "
1554 "non-existent attachment %"PRId64".\n",
1555 i, tags[i].target.attachuid);
1557 } else if (tags[i].target.chapteruid) {
1558 MatroskaChapter *chapter = matroska->chapters.elem;
1560 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1561 if (chapter[j].uid == tags[i].target.chapteruid &&
1562 chapter[j].chapter) {
1563 matroska_convert_tag(s, &tags[i].tag,
1564 &chapter[j].chapter->metadata, NULL);
1569 av_log(NULL, AV_LOG_WARNING,
1570 "The tags at index %d refer to a non-existent chapter "
1572 i, tags[i].target.chapteruid);
1574 } else if (tags[i].target.trackuid) {
1575 MatroskaTrack *track = matroska->tracks.elem;
1577 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1578 if (track[j].uid == tags[i].target.trackuid &&
1580 matroska_convert_tag(s, &tags[i].tag,
1581 &track[j].stream->metadata, NULL);
1586 av_log(NULL, AV_LOG_WARNING,
1587 "The tags at index %d refer to a non-existent track "
1589 i, tags[i].target.trackuid);
1592 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1593 tags[i].target.type);
1598 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1601 uint32_t saved_id = matroska->current_id;
1602 int64_t before_pos = avio_tell(matroska->ctx->pb);
1603 MatroskaLevel level;
1608 offset = pos + matroska->segment_start;
1609 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1610 /* We don't want to lose our seekhead level, so we add
1611 * a dummy. This is a crude hack. */
1612 if (matroska->num_levels == EBML_MAX_DEPTH) {
1613 av_log(matroska->ctx, AV_LOG_INFO,
1614 "Max EBML element depth (%d) reached, "
1615 "cannot parse further.\n", EBML_MAX_DEPTH);
1616 ret = AVERROR_INVALIDDATA;
1619 level.length = EBML_UNKNOWN_LENGTH;
1620 matroska->levels[matroska->num_levels] = level;
1621 matroska->num_levels++;
1622 matroska->current_id = 0;
1624 ret = ebml_parse(matroska, matroska_segment, matroska);
1626 /* remove dummy level */
1627 while (matroska->num_levels) {
1628 uint64_t length = matroska->levels[--matroska->num_levels].length;
1629 if (length == EBML_UNKNOWN_LENGTH)
1635 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1636 matroska->current_id = saved_id;
1641 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1643 EbmlList *seekhead_list = &matroska->seekhead;
1646 // we should not do any seeking in the streaming case
1647 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1650 for (i = 0; i < seekhead_list->nb_elem; i++) {
1651 MatroskaSeekhead *seekheads = seekhead_list->elem;
1652 uint32_t id = seekheads[i].id;
1653 uint64_t pos = seekheads[i].pos;
1655 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1656 if (!elem || elem->parsed)
1661 // defer cues parsing until we actually need cue data.
1662 if (id == MATROSKA_ID_CUES)
1665 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1666 // mark index as broken
1667 matroska->cues_parsing_deferred = -1;
1675 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1677 EbmlList *index_list;
1678 MatroskaIndex *index;
1679 uint64_t index_scale = 1;
1682 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1685 index_list = &matroska->index;
1686 index = index_list->elem;
1687 if (index_list->nb_elem < 2)
1689 if (index[1].time > 1E14 / matroska->time_scale) {
1690 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1693 for (i = 0; i < index_list->nb_elem; i++) {
1694 EbmlList *pos_list = &index[i].pos;
1695 MatroskaIndexPos *pos = pos_list->elem;
1696 for (j = 0; j < pos_list->nb_elem; j++) {
1697 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1699 if (track && track->stream)
1700 av_add_index_entry(track->stream,
1701 pos[j].pos + matroska->segment_start,
1702 index[i].time / index_scale, 0, 0,
1708 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1711 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1714 for (i = 0; i < matroska->num_level1_elems; i++) {
1715 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1716 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1717 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1718 matroska->cues_parsing_deferred = -1;
1724 matroska_add_index_entries(matroska);
1727 static int matroska_aac_profile(char *codec_id)
1729 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1732 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1733 if (strstr(codec_id, aac_profiles[profile]))
1738 static int matroska_aac_sri(int samplerate)
1742 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1743 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1748 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1750 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1751 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1754 static int matroska_parse_flac(AVFormatContext *s,
1755 MatroskaTrack *track,
1758 AVStream *st = track->stream;
1759 uint8_t *p = track->codec_priv.data;
1760 int size = track->codec_priv.size;
1762 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1763 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1764 track->codec_priv.size = 0;
1768 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1770 p += track->codec_priv.size;
1771 size -= track->codec_priv.size;
1773 /* parse the remaining metadata blocks if present */
1775 int block_last, block_type, block_size;
1777 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1781 if (block_size > size)
1784 /* check for the channel mask */
1785 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1786 AVDictionary *dict = NULL;
1787 AVDictionaryEntry *chmask;
1789 ff_vorbis_comment(s, &dict, p, block_size, 0);
1790 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1792 uint64_t mask = strtol(chmask->value, NULL, 0);
1793 if (!mask || mask & ~0x3ffffULL) {
1794 av_log(s, AV_LOG_WARNING,
1795 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1797 st->codecpar->channel_layout = mask;
1799 av_dict_free(&dict);
1809 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1811 int major, minor, micro, bttb = 0;
1813 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1814 * this function, and fixed in 57.52 */
1815 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1816 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1818 switch (field_order) {
1819 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1820 return AV_FIELD_PROGRESSIVE;
1821 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1822 return AV_FIELD_UNKNOWN;
1823 case MATROSKA_VIDEO_FIELDORDER_TT:
1825 case MATROSKA_VIDEO_FIELDORDER_BB:
1827 case MATROSKA_VIDEO_FIELDORDER_BT:
1828 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1829 case MATROSKA_VIDEO_FIELDORDER_TB:
1830 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1832 return AV_FIELD_UNKNOWN;
1836 static void mkv_stereo_mode_display_mul(int stereo_mode,
1837 int *h_width, int *h_height)
1839 switch (stereo_mode) {
1840 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1841 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1842 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1843 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1844 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1846 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1847 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1848 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1849 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1852 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1853 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1854 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1855 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1861 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1862 const MatroskaTrackVideoColor *color = track->video.color.elem;
1863 const MatroskaMasteringMeta *mastering_meta;
1864 int has_mastering_primaries, has_mastering_luminance;
1866 if (!track->video.color.nb_elem)
1869 mastering_meta = &color->mastering_meta;
1870 // Mastering primaries are CIE 1931 coords, and must be > 0.
1871 has_mastering_primaries =
1872 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1873 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1874 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1875 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1876 has_mastering_luminance = mastering_meta->max_luminance > 0;
1878 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1879 st->codecpar->color_space = color->matrix_coefficients;
1880 if (color->primaries != AVCOL_PRI_RESERVED &&
1881 color->primaries != AVCOL_PRI_RESERVED0)
1882 st->codecpar->color_primaries = color->primaries;
1883 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1884 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1885 st->codecpar->color_trc = color->transfer_characteristics;
1886 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1887 color->range <= AVCOL_RANGE_JPEG)
1888 st->codecpar->color_range = color->range;
1889 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1890 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1891 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1892 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1893 st->codecpar->chroma_location =
1894 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1895 (color->chroma_siting_vert - 1) << 7);
1897 if (color->max_cll && color->max_fall) {
1900 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1902 return AVERROR(ENOMEM);
1903 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1904 (uint8_t *)metadata, size);
1906 av_freep(&metadata);
1909 metadata->MaxCLL = color->max_cll;
1910 metadata->MaxFALL = color->max_fall;
1913 if (has_mastering_primaries || has_mastering_luminance) {
1914 // Use similar rationals as other standards.
1915 const int chroma_den = 50000;
1916 const int luma_den = 10000;
1917 AVMasteringDisplayMetadata *metadata =
1918 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1919 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1920 sizeof(AVMasteringDisplayMetadata));
1922 return AVERROR(ENOMEM);
1924 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1925 if (has_mastering_primaries) {
1926 metadata->display_primaries[0][0] = av_make_q(
1927 round(mastering_meta->r_x * chroma_den), chroma_den);
1928 metadata->display_primaries[0][1] = av_make_q(
1929 round(mastering_meta->r_y * chroma_den), chroma_den);
1930 metadata->display_primaries[1][0] = av_make_q(
1931 round(mastering_meta->g_x * chroma_den), chroma_den);
1932 metadata->display_primaries[1][1] = av_make_q(
1933 round(mastering_meta->g_y * chroma_den), chroma_den);
1934 metadata->display_primaries[2][0] = av_make_q(
1935 round(mastering_meta->b_x * chroma_den), chroma_den);
1936 metadata->display_primaries[2][1] = av_make_q(
1937 round(mastering_meta->b_y * chroma_den), chroma_den);
1938 metadata->white_point[0] = av_make_q(
1939 round(mastering_meta->white_x * chroma_den), chroma_den);
1940 metadata->white_point[1] = av_make_q(
1941 round(mastering_meta->white_y * chroma_den), chroma_den);
1942 metadata->has_primaries = 1;
1944 if (has_mastering_luminance) {
1945 metadata->max_luminance = av_make_q(
1946 round(mastering_meta->max_luminance * luma_den), luma_den);
1947 metadata->min_luminance = av_make_q(
1948 round(mastering_meta->min_luminance * luma_den), luma_den);
1949 metadata->has_luminance = 1;
1955 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1956 AVSphericalMapping *spherical;
1957 enum AVSphericalProjection projection;
1958 size_t spherical_size;
1959 uint32_t l = 0, t = 0, r = 0, b = 0;
1960 uint32_t padding = 0;
1964 bytestream2_init(&gb, track->video.projection.private.data,
1965 track->video.projection.private.size);
1967 if (bytestream2_get_byte(&gb) != 0) {
1968 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1972 bytestream2_skip(&gb, 3); // flags
1974 switch (track->video.projection.type) {
1975 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1976 if (track->video.projection.private.size == 20) {
1977 t = bytestream2_get_be32(&gb);
1978 b = bytestream2_get_be32(&gb);
1979 l = bytestream2_get_be32(&gb);
1980 r = bytestream2_get_be32(&gb);
1982 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1983 av_log(NULL, AV_LOG_ERROR,
1984 "Invalid bounding rectangle coordinates "
1985 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1987 return AVERROR_INVALIDDATA;
1989 } else if (track->video.projection.private.size != 0) {
1990 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1991 return AVERROR_INVALIDDATA;
1994 if (l || t || r || b)
1995 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1997 projection = AV_SPHERICAL_EQUIRECTANGULAR;
1999 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2000 if (track->video.projection.private.size < 4) {
2001 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2002 return AVERROR_INVALIDDATA;
2003 } else if (track->video.projection.private.size == 12) {
2004 uint32_t layout = bytestream2_get_be32(&gb);
2006 av_log(NULL, AV_LOG_WARNING,
2007 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2010 projection = AV_SPHERICAL_CUBEMAP;
2011 padding = bytestream2_get_be32(&gb);
2013 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2014 return AVERROR_INVALIDDATA;
2017 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2018 /* No Spherical metadata */
2021 av_log(NULL, AV_LOG_WARNING,
2022 "Unknown spherical metadata type %"PRIu64"\n",
2023 track->video.projection.type);
2027 spherical = av_spherical_alloc(&spherical_size);
2029 return AVERROR(ENOMEM);
2031 spherical->projection = projection;
2033 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2034 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2035 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2037 spherical->padding = padding;
2039 spherical->bound_left = l;
2040 spherical->bound_top = t;
2041 spherical->bound_right = r;
2042 spherical->bound_bottom = b;
2044 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2047 av_freep(&spherical);
2054 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2056 const AVCodecTag *codec_tags;
2058 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2059 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2061 /* Normalize noncompliant private data that starts with the fourcc
2062 * by expanding/shifting the data by 4 bytes and storing the data
2063 * size at the start. */
2064 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2065 int ret = av_buffer_realloc(&track->codec_priv.buf,
2066 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2070 track->codec_priv.data = track->codec_priv.buf->data;
2071 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2072 track->codec_priv.size += 4;
2073 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2076 *fourcc = AV_RL32(track->codec_priv.data + 4);
2077 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2082 static int matroska_parse_tracks(AVFormatContext *s)
2084 MatroskaDemuxContext *matroska = s->priv_data;
2085 MatroskaTrack *tracks = matroska->tracks.elem;
2090 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2091 MatroskaTrack *track = &tracks[i];
2092 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2093 EbmlList *encodings_list = &track->encodings;
2094 MatroskaTrackEncoding *encodings = encodings_list->elem;
2095 uint8_t *extradata = NULL;
2096 int extradata_size = 0;
2097 int extradata_offset = 0;
2098 uint32_t fourcc = 0;
2100 char* key_id_base64 = NULL;
2103 /* Apply some sanity checks. */
2104 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2105 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2106 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2107 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2108 av_log(matroska->ctx, AV_LOG_INFO,
2109 "Unknown or unsupported track type %"PRIu64"\n",
2113 if (!track->codec_id)
2116 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2117 isnan(track->audio.samplerate)) {
2118 av_log(matroska->ctx, AV_LOG_WARNING,
2119 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2120 track->audio.samplerate);
2121 track->audio.samplerate = 8000;
2124 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2125 if (!track->default_duration && track->video.frame_rate > 0) {
2126 double default_duration = 1000000000 / track->video.frame_rate;
2127 if (default_duration > UINT64_MAX || default_duration < 0) {
2128 av_log(matroska->ctx, AV_LOG_WARNING,
2129 "Invalid frame rate %e. Cannot calculate default duration.\n",
2130 track->video.frame_rate);
2132 track->default_duration = default_duration;
2135 if (track->video.display_width == -1)
2136 track->video.display_width = track->video.pixel_width;
2137 if (track->video.display_height == -1)
2138 track->video.display_height = track->video.pixel_height;
2139 if (track->video.color_space.size == 4)
2140 fourcc = AV_RL32(track->video.color_space.data);
2141 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2142 if (!track->audio.out_samplerate)
2143 track->audio.out_samplerate = track->audio.samplerate;
2145 if (encodings_list->nb_elem > 1) {
2146 av_log(matroska->ctx, AV_LOG_ERROR,
2147 "Multiple combined encodings not supported");
2148 } else if (encodings_list->nb_elem == 1) {
2149 if (encodings[0].type) {
2150 if (encodings[0].encryption.key_id.size > 0) {
2151 /* Save the encryption key id to be stored later as a
2153 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2154 key_id_base64 = av_malloc(b64_size);
2155 if (key_id_base64 == NULL)
2156 return AVERROR(ENOMEM);
2158 av_base64_encode(key_id_base64, b64_size,
2159 encodings[0].encryption.key_id.data,
2160 encodings[0].encryption.key_id.size);
2162 encodings[0].scope = 0;
2163 av_log(matroska->ctx, AV_LOG_ERROR,
2164 "Unsupported encoding type");
2168 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2171 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2174 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2176 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2177 encodings[0].scope = 0;
2178 av_log(matroska->ctx, AV_LOG_ERROR,
2179 "Unsupported encoding type");
2180 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2181 uint8_t *codec_priv = track->codec_priv.data;
2182 int ret = matroska_decode_buffer(&track->codec_priv.data,
2183 &track->codec_priv.size,
2186 track->codec_priv.data = NULL;
2187 track->codec_priv.size = 0;
2188 av_log(matroska->ctx, AV_LOG_ERROR,
2189 "Failed to decode codec private data\n");
2192 if (codec_priv != track->codec_priv.data) {
2193 av_buffer_unref(&track->codec_priv.buf);
2194 if (track->codec_priv.data) {
2195 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2196 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2198 if (!track->codec_priv.buf) {
2199 av_freep(&track->codec_priv.data);
2200 track->codec_priv.size = 0;
2201 return AVERROR(ENOMEM);
2208 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2209 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2210 strlen(ff_mkv_codec_tags[j].str))) {
2211 codec_id = ff_mkv_codec_tags[j].id;
2216 st = track->stream = avformat_new_stream(s, NULL);
2218 av_free(key_id_base64);
2219 return AVERROR(ENOMEM);
2222 if (key_id_base64) {
2223 /* export encryption key id as base64 metadata tag */
2224 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2225 av_freep(&key_id_base64);
2228 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2229 track->codec_priv.size >= 40 &&
2230 track->codec_priv.data) {
2231 track->ms_compat = 1;
2232 bit_depth = AV_RL16(track->codec_priv.data + 14);
2233 fourcc = AV_RL32(track->codec_priv.data + 16);
2234 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2237 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2239 extradata_offset = 40;
2240 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2241 track->codec_priv.size >= 14 &&
2242 track->codec_priv.data) {
2244 ffio_init_context(&b, track->codec_priv.data,
2245 track->codec_priv.size,
2246 0, NULL, NULL, NULL, NULL);
2247 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2250 codec_id = st->codecpar->codec_id;
2251 fourcc = st->codecpar->codec_tag;
2252 extradata_offset = FFMIN(track->codec_priv.size, 18);
2253 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2254 /* Normally 36, but allow noncompliant private data */
2255 && (track->codec_priv.size >= 32)
2256 && (track->codec_priv.data)) {
2257 uint16_t sample_size;
2258 int ret = get_qt_codec(track, &fourcc, &codec_id);
2261 sample_size = AV_RB16(track->codec_priv.data + 26);
2263 if (sample_size == 8) {
2264 fourcc = MKTAG('r','a','w',' ');
2265 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2266 } else if (sample_size == 16) {
2267 fourcc = MKTAG('t','w','o','s');
2268 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2271 if ((fourcc == MKTAG('t','w','o','s') ||
2272 fourcc == MKTAG('s','o','w','t')) &&
2274 codec_id = AV_CODEC_ID_PCM_S8;
2275 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2276 (track->codec_priv.size >= 21) &&
2277 (track->codec_priv.data)) {
2278 int ret = get_qt_codec(track, &fourcc, &codec_id);
2281 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2282 fourcc = MKTAG('S','V','Q','3');
2283 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2285 if (codec_id == AV_CODEC_ID_NONE)
2286 av_log(matroska->ctx, AV_LOG_ERROR,
2287 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2288 if (track->codec_priv.size >= 86) {
2289 bit_depth = AV_RB16(track->codec_priv.data + 82);
2290 ffio_init_context(&b, track->codec_priv.data,
2291 track->codec_priv.size,
2292 0, NULL, NULL, NULL, NULL);
2293 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2295 track->has_palette = 1;
2298 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2299 switch (track->audio.bitdepth) {
2301 codec_id = AV_CODEC_ID_PCM_U8;
2304 codec_id = AV_CODEC_ID_PCM_S24BE;
2307 codec_id = AV_CODEC_ID_PCM_S32BE;
2310 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2311 switch (track->audio.bitdepth) {
2313 codec_id = AV_CODEC_ID_PCM_U8;
2316 codec_id = AV_CODEC_ID_PCM_S24LE;
2319 codec_id = AV_CODEC_ID_PCM_S32LE;
2322 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2323 track->audio.bitdepth == 64) {
2324 codec_id = AV_CODEC_ID_PCM_F64LE;
2325 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2326 int profile = matroska_aac_profile(track->codec_id);
2327 int sri = matroska_aac_sri(track->audio.samplerate);
2328 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2330 return AVERROR(ENOMEM);
2331 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2332 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2333 if (strstr(track->codec_id, "SBR")) {
2334 sri = matroska_aac_sri(track->audio.out_samplerate);
2335 extradata[2] = 0x56;
2336 extradata[3] = 0xE5;
2337 extradata[4] = 0x80 | (sri << 3);
2341 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2342 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2343 * Create the "atom size", "tag", and "tag version" fields the
2344 * decoder expects manually. */
2345 extradata_size = 12 + track->codec_priv.size;
2346 extradata = av_mallocz(extradata_size +
2347 AV_INPUT_BUFFER_PADDING_SIZE);
2349 return AVERROR(ENOMEM);
2350 AV_WB32(extradata, extradata_size);
2351 memcpy(&extradata[4], "alac", 4);
2352 AV_WB32(&extradata[8], 0);
2353 memcpy(&extradata[12], track->codec_priv.data,
2354 track->codec_priv.size);
2355 } else if (codec_id == AV_CODEC_ID_TTA) {
2356 extradata_size = 30;
2357 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2359 return AVERROR(ENOMEM);
2360 ffio_init_context(&b, extradata, extradata_size, 1,
2361 NULL, NULL, NULL, NULL);
2362 avio_write(&b, "TTA1", 4);
2364 if (track->audio.channels > UINT16_MAX ||
2365 track->audio.bitdepth > UINT16_MAX) {
2366 av_log(matroska->ctx, AV_LOG_WARNING,
2367 "Too large audio channel number %"PRIu64
2368 " or bitdepth %"PRIu64". Skipping track.\n",
2369 track->audio.channels, track->audio.bitdepth);
2370 av_freep(&extradata);
2371 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2372 return AVERROR_INVALIDDATA;
2376 avio_wl16(&b, track->audio.channels);
2377 avio_wl16(&b, track->audio.bitdepth);
2378 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2379 return AVERROR_INVALIDDATA;
2380 avio_wl32(&b, track->audio.out_samplerate);
2381 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2382 track->audio.out_samplerate,
2383 AV_TIME_BASE * 1000));
2384 } else if (codec_id == AV_CODEC_ID_RV10 ||
2385 codec_id == AV_CODEC_ID_RV20 ||
2386 codec_id == AV_CODEC_ID_RV30 ||
2387 codec_id == AV_CODEC_ID_RV40) {
2388 extradata_offset = 26;
2389 } else if (codec_id == AV_CODEC_ID_RA_144) {
2390 track->audio.out_samplerate = 8000;
2391 track->audio.channels = 1;
2392 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2393 codec_id == AV_CODEC_ID_COOK ||
2394 codec_id == AV_CODEC_ID_ATRAC3 ||
2395 codec_id == AV_CODEC_ID_SIPR)
2396 && track->codec_priv.data) {
2399 ffio_init_context(&b, track->codec_priv.data,
2400 track->codec_priv.size,
2401 0, NULL, NULL, NULL, NULL);
2403 flavor = avio_rb16(&b);
2404 track->audio.coded_framesize = avio_rb32(&b);
2406 track->audio.sub_packet_h = avio_rb16(&b);
2407 track->audio.frame_size = avio_rb16(&b);
2408 track->audio.sub_packet_size = avio_rb16(&b);
2410 track->audio.coded_framesize <= 0 ||
2411 track->audio.sub_packet_h <= 0 ||
2412 track->audio.frame_size <= 0 ||
2413 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2414 return AVERROR_INVALIDDATA;
2415 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2416 track->audio.frame_size);
2417 if (!track->audio.buf)
2418 return AVERROR(ENOMEM);
2419 if (codec_id == AV_CODEC_ID_RA_288) {
2420 st->codecpar->block_align = track->audio.coded_framesize;
2421 track->codec_priv.size = 0;
2423 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2424 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2425 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2426 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2428 st->codecpar->block_align = track->audio.sub_packet_size;
2429 extradata_offset = 78;
2431 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2432 ret = matroska_parse_flac(s, track, &extradata_offset);
2435 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2436 fourcc = AV_RL32(track->codec_priv.data);
2437 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2438 /* we don't need any value stored in CodecPrivate.
2439 make sure that it's not exported as extradata. */
2440 track->codec_priv.size = 0;
2441 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2442 /* For now, propagate only the OBUs, if any. Once libavcodec is
2443 updated to handle isobmff style extradata this can be removed. */
2444 extradata_offset = 4;
2446 track->codec_priv.size -= extradata_offset;
2448 if (codec_id == AV_CODEC_ID_NONE)
2449 av_log(matroska->ctx, AV_LOG_INFO,
2450 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2452 if (track->time_scale < 0.01)
2453 track->time_scale = 1.0;
2454 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2455 1000 * 1000 * 1000); /* 64 bit pts in ns */
2457 /* convert the delay from ns to the track timebase */
2458 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2459 (AVRational){ 1, 1000000000 },
2462 st->codecpar->codec_id = codec_id;
2464 if (strcmp(track->language, "und"))
2465 av_dict_set(&st->metadata, "language", track->language, 0);
2466 av_dict_set(&st->metadata, "title", track->name, 0);
2468 if (track->flag_default)
2469 st->disposition |= AV_DISPOSITION_DEFAULT;
2470 if (track->flag_forced)
2471 st->disposition |= AV_DISPOSITION_FORCED;
2473 if (!st->codecpar->extradata) {
2475 st->codecpar->extradata = extradata;
2476 st->codecpar->extradata_size = extradata_size;
2477 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2478 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2479 return AVERROR(ENOMEM);
2480 memcpy(st->codecpar->extradata,
2481 track->codec_priv.data + extradata_offset,
2482 track->codec_priv.size);
2486 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2487 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2488 int display_width_mul = 1;
2489 int display_height_mul = 1;
2491 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2492 st->codecpar->codec_tag = fourcc;
2494 st->codecpar->bits_per_coded_sample = bit_depth;
2495 st->codecpar->width = track->video.pixel_width;
2496 st->codecpar->height = track->video.pixel_height;
2498 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2499 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2500 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2501 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2503 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2504 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2506 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2507 av_reduce(&st->sample_aspect_ratio.num,
2508 &st->sample_aspect_ratio.den,
2509 st->codecpar->height * track->video.display_width * display_width_mul,
2510 st->codecpar->width * track->video.display_height * display_height_mul,
2513 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2514 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2516 if (track->default_duration) {
2517 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2518 1000000000, track->default_duration, 30000);
2519 #if FF_API_R_FRAME_RATE
2520 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2521 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2522 st->r_frame_rate = st->avg_frame_rate;
2526 /* export stereo mode flag as metadata tag */
2527 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2528 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2530 /* export alpha mode flag as metadata tag */
2531 if (track->video.alpha_mode)
2532 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2534 /* if we have virtual track, mark the real tracks */
2535 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2537 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2539 snprintf(buf, sizeof(buf), "%s_%d",
2540 ff_matroska_video_stereo_plane[planes[j].type], i);
2541 for (k=0; k < matroska->tracks.nb_elem; k++)
2542 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2543 av_dict_set(&tracks[k].stream->metadata,
2544 "stereo_mode", buf, 0);
2548 // add stream level stereo3d side data if it is a supported format
2549 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2550 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2551 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2556 ret = mkv_parse_video_color(st, track);
2559 ret = mkv_parse_video_projection(st, track);
2562 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2563 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2564 st->codecpar->codec_tag = fourcc;
2565 st->codecpar->sample_rate = track->audio.out_samplerate;
2566 st->codecpar->channels = track->audio.channels;
2567 if (!st->codecpar->bits_per_coded_sample)
2568 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2569 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2570 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2571 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2572 st->need_parsing = AVSTREAM_PARSE_FULL;
2573 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2574 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2575 if (track->codec_delay > 0) {
2576 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2577 (AVRational){1, 1000000000},
2578 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2579 48000 : st->codecpar->sample_rate});
2581 if (track->seek_preroll > 0) {
2582 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2583 (AVRational){1, 1000000000},
2584 (AVRational){1, st->codecpar->sample_rate});
2586 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2587 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2589 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2590 st->disposition |= AV_DISPOSITION_CAPTIONS;
2591 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2592 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2593 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2594 st->disposition |= AV_DISPOSITION_METADATA;
2596 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2597 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2604 static int matroska_read_header(AVFormatContext *s)
2606 MatroskaDemuxContext *matroska = s->priv_data;
2607 EbmlList *attachments_list = &matroska->attachments;
2608 EbmlList *chapters_list = &matroska->chapters;
2609 MatroskaAttachment *attachments;
2610 MatroskaChapter *chapters;
2611 uint64_t max_start = 0;
2617 matroska->cues_parsing_deferred = 1;
2619 /* First read the EBML header. */
2620 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2621 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2622 ebml_free(ebml_syntax, &ebml);
2623 return AVERROR_INVALIDDATA;
2625 if (ebml.version > EBML_VERSION ||
2626 ebml.max_size > sizeof(uint64_t) ||
2627 ebml.id_length > sizeof(uint32_t) ||
2628 ebml.doctype_version > 3) {
2629 avpriv_report_missing_feature(matroska->ctx,
2630 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2631 ebml.version, ebml.doctype, ebml.doctype_version);
2632 ebml_free(ebml_syntax, &ebml);
2633 return AVERROR_PATCHWELCOME;
2634 } else if (ebml.doctype_version == 3) {
2635 av_log(matroska->ctx, AV_LOG_WARNING,
2636 "EBML header using unsupported features\n"
2637 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2638 ebml.version, ebml.doctype, ebml.doctype_version);
2640 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2641 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2643 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2644 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2645 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2646 ebml_free(ebml_syntax, &ebml);
2647 return AVERROR_INVALIDDATA;
2650 ebml_free(ebml_syntax, &ebml);
2652 /* The next thing is a segment. */
2653 pos = avio_tell(matroska->ctx->pb);
2654 res = ebml_parse(matroska, matroska_segments, matroska);
2655 // try resyncing until we find a EBML_STOP type element.
2657 res = matroska_resync(matroska, pos);
2660 pos = avio_tell(matroska->ctx->pb);
2661 res = ebml_parse(matroska, matroska_segment, matroska);
2663 /* Set data_offset as it might be needed later by seek_frame_generic. */
2664 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2665 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2666 matroska_execute_seekhead(matroska);
2668 if (!matroska->time_scale)
2669 matroska->time_scale = 1000000;
2670 if (matroska->duration)
2671 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2672 1000 / AV_TIME_BASE;
2673 av_dict_set(&s->metadata, "title", matroska->title, 0);
2674 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2676 if (matroska->date_utc.size == 8)
2677 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2679 res = matroska_parse_tracks(s);
2683 attachments = attachments_list->elem;
2684 for (j = 0; j < attachments_list->nb_elem; j++) {
2685 if (!(attachments[j].filename && attachments[j].mime &&
2686 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2687 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2689 AVStream *st = avformat_new_stream(s, NULL);
2692 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2693 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2694 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2696 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2697 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2698 strlen(ff_mkv_image_mime_tags[i].str))) {
2699 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2704 attachments[j].stream = st;
2706 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2707 AVPacket *pkt = &st->attached_pic;
2709 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2710 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2712 av_init_packet(pkt);
2713 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2715 return AVERROR(ENOMEM);
2716 pkt->data = attachments[j].bin.data;
2717 pkt->size = attachments[j].bin.size;
2718 pkt->stream_index = st->index;
2719 pkt->flags |= AV_PKT_FLAG_KEY;
2721 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2722 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2724 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2725 attachments[j].bin.size);
2727 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2728 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2729 strlen(ff_mkv_mime_tags[i].str))) {
2730 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2738 chapters = chapters_list->elem;
2739 for (i = 0; i < chapters_list->nb_elem; i++)
2740 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2741 (max_start == 0 || chapters[i].start > max_start)) {
2742 chapters[i].chapter =
2743 avpriv_new_chapter(s, chapters[i].uid,
2744 (AVRational) { 1, 1000000000 },
2745 chapters[i].start, chapters[i].end,
2747 if (chapters[i].chapter) {
2748 av_dict_set(&chapters[i].chapter->metadata,
2749 "title", chapters[i].title, 0);
2751 max_start = chapters[i].start;
2754 matroska_add_index_entries(matroska);
2756 matroska_convert_tags(s);
2760 matroska_read_close(s);
2765 * Put one packet in an application-supplied AVPacket struct.
2766 * Returns 0 on success or -1 on failure.
2768 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2771 if (matroska->queue) {
2772 MatroskaTrack *tracks = matroska->tracks.elem;
2773 MatroskaTrack *track;
2775 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2776 track = &tracks[pkt->stream_index];
2777 if (track->has_palette) {
2778 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2780 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2782 memcpy(pal, track->palette, AVPALETTE_SIZE);
2784 track->has_palette = 0;
2793 * Free all packets in our internal queue.
2795 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2797 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2800 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2801 int *buf_size, int type,
2802 uint32_t **lace_buf, int *laces)
2804 int res = 0, n, size = *buf_size;
2805 uint8_t *data = *buf;
2806 uint32_t *lace_size;
2810 *lace_buf = av_malloc(sizeof(**lace_buf));
2812 return AVERROR(ENOMEM);
2814 *lace_buf[0] = size;
2818 av_assert0(size > 0);
2822 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2824 return AVERROR(ENOMEM);
2827 case 0x1: /* Xiph lacing */
2831 for (n = 0; res == 0 && n < *laces - 1; n++) {
2835 if (size <= total) {
2836 res = AVERROR_INVALIDDATA;
2841 lace_size[n] += temp;
2848 if (size <= total) {
2849 res = AVERROR_INVALIDDATA;
2853 lace_size[n] = size - total;
2857 case 0x2: /* fixed-size lacing */
2858 if (size % (*laces)) {
2859 res = AVERROR_INVALIDDATA;
2862 for (n = 0; n < *laces; n++)
2863 lace_size[n] = size / *laces;
2866 case 0x3: /* EBML lacing */
2870 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2871 if (n < 0 || num > INT_MAX) {
2872 av_log(matroska->ctx, AV_LOG_INFO,
2873 "EBML block data error\n");
2874 res = n<0 ? n : AVERROR_INVALIDDATA;
2879 total = lace_size[0] = num;
2880 for (n = 1; res == 0 && n < *laces - 1; n++) {
2883 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2884 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2885 av_log(matroska->ctx, AV_LOG_INFO,
2886 "EBML block data error\n");
2887 res = r<0 ? r : AVERROR_INVALIDDATA;
2892 lace_size[n] = lace_size[n - 1] + snum;
2893 total += lace_size[n];
2895 if (size <= total) {
2896 res = AVERROR_INVALIDDATA;
2899 lace_size[*laces - 1] = size - total;
2905 *lace_buf = lace_size;
2911 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2912 MatroskaTrack *track, AVStream *st,
2913 uint8_t *data, int size, uint64_t timecode,
2916 int a = st->codecpar->block_align;
2917 int sps = track->audio.sub_packet_size;
2918 int cfs = track->audio.coded_framesize;
2919 int h = track->audio.sub_packet_h;
2920 int y = track->audio.sub_packet_cnt;
2921 int w = track->audio.frame_size;
2924 if (!track->audio.pkt_cnt) {
2925 if (track->audio.sub_packet_cnt == 0)
2926 track->audio.buf_timecode = timecode;
2927 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2928 if (size < cfs * h / 2) {
2929 av_log(matroska->ctx, AV_LOG_ERROR,
2930 "Corrupt int4 RM-style audio packet size\n");
2931 return AVERROR_INVALIDDATA;
2933 for (x = 0; x < h / 2; x++)
2934 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2935 data + x * cfs, cfs);
2936 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2938 av_log(matroska->ctx, AV_LOG_ERROR,
2939 "Corrupt sipr RM-style audio packet size\n");
2940 return AVERROR_INVALIDDATA;
2942 memcpy(track->audio.buf + y * w, data, w);
2944 if (size < sps * w / sps || h<=0 || w%sps) {
2945 av_log(matroska->ctx, AV_LOG_ERROR,
2946 "Corrupt generic RM-style audio packet size\n");
2947 return AVERROR_INVALIDDATA;
2949 for (x = 0; x < w / sps; x++)
2950 memcpy(track->audio.buf +
2951 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2952 data + x * sps, sps);
2955 if (++track->audio.sub_packet_cnt >= h) {
2956 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2957 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2958 track->audio.sub_packet_cnt = 0;
2959 track->audio.pkt_cnt = h * w / a;
2963 while (track->audio.pkt_cnt) {
2965 AVPacket pktl, *pkt = &pktl;
2967 ret = av_new_packet(pkt, a);
2972 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2974 pkt->pts = track->audio.buf_timecode;
2975 track->audio.buf_timecode = AV_NOPTS_VALUE;
2977 pkt->stream_index = st->index;
2978 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2980 av_packet_unref(pkt);
2981 return AVERROR(ENOMEM);
2988 /* reconstruct full wavpack blocks from mangled matroska ones */
2989 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2990 uint8_t **pdst, int *size)
2992 uint8_t *dst = NULL;
2997 int ret, offset = 0;
2999 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3000 return AVERROR_INVALIDDATA;
3002 ver = AV_RL16(track->stream->codecpar->extradata);
3004 samples = AV_RL32(src);
3008 while (srclen >= 8) {
3013 uint32_t flags = AV_RL32(src);
3014 uint32_t crc = AV_RL32(src + 4);
3018 multiblock = (flags & 0x1800) != 0x1800;
3021 ret = AVERROR_INVALIDDATA;
3024 blocksize = AV_RL32(src);
3030 if (blocksize > srclen) {
3031 ret = AVERROR_INVALIDDATA;
3035 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3037 ret = AVERROR(ENOMEM);
3041 dstlen += blocksize + 32;
3043 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3044 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3045 AV_WL16(dst + offset + 8, ver); // version
3046 AV_WL16(dst + offset + 10, 0); // track/index_no
3047 AV_WL32(dst + offset + 12, 0); // total samples
3048 AV_WL32(dst + offset + 16, 0); // block index
3049 AV_WL32(dst + offset + 20, samples); // number of samples
3050 AV_WL32(dst + offset + 24, flags); // flags
3051 AV_WL32(dst + offset + 28, crc); // crc
3052 memcpy(dst + offset + 32, src, blocksize); // block data
3055 srclen -= blocksize;
3056 offset += blocksize + 32;
3059 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3071 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3072 uint8_t **pdst, int *size)
3077 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3078 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3080 return AVERROR(ENOMEM);
3082 AV_WB32(dst, dstlen);
3083 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3084 memcpy(dst + 8, src, dstlen);
3085 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3095 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3096 MatroskaTrack *track,
3098 uint8_t *data, int data_len,
3103 AVPacket pktl, *pkt = &pktl;
3104 uint8_t *id, *settings, *text, *buf;
3105 int id_len, settings_len, text_len;
3110 return AVERROR_INVALIDDATA;
3113 q = data + data_len;
3118 if (*p == '\r' || *p == '\n') {
3127 if (p >= q || *p != '\n')
3128 return AVERROR_INVALIDDATA;
3134 if (*p == '\r' || *p == '\n') {
3135 settings_len = p - settings;
3143 if (p >= q || *p != '\n')
3144 return AVERROR_INVALIDDATA;
3149 while (text_len > 0) {
3150 const int len = text_len - 1;
3151 const uint8_t c = p[len];
3152 if (c != '\r' && c != '\n')
3158 return AVERROR_INVALIDDATA;
3160 err = av_new_packet(pkt, text_len);
3165 memcpy(pkt->data, text, text_len);
3168 buf = av_packet_new_side_data(pkt,
3169 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3172 av_packet_unref(pkt);
3173 return AVERROR(ENOMEM);
3175 memcpy(buf, id, id_len);
3178 if (settings_len > 0) {
3179 buf = av_packet_new_side_data(pkt,
3180 AV_PKT_DATA_WEBVTT_SETTINGS,
3183 av_packet_unref(pkt);
3184 return AVERROR(ENOMEM);
3186 memcpy(buf, settings, settings_len);
3189 // Do we need this for subtitles?
3190 // pkt->flags = AV_PKT_FLAG_KEY;
3192 pkt->stream_index = st->index;
3193 pkt->pts = timecode;
3195 // Do we need this for subtitles?
3196 // pkt->dts = timecode;
3198 pkt->duration = duration;
3201 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3203 av_packet_unref(pkt);
3204 return AVERROR(ENOMEM);
3210 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3211 MatroskaTrack *track, AVStream *st,
3212 AVBufferRef *buf, uint8_t *data, int pkt_size,
3213 uint64_t timecode, uint64_t lace_duration,
3214 int64_t pos, int is_keyframe,
3215 uint8_t *additional, uint64_t additional_id, int additional_size,
3216 int64_t discard_padding)
3218 MatroskaTrackEncoding *encodings = track->encodings.elem;
3219 uint8_t *pkt_data = data;
3221 AVPacket pktl, *pkt = &pktl;
3223 if (encodings && !encodings->type && encodings->scope & 1) {
3224 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3229 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3231 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3233 av_log(matroska->ctx, AV_LOG_ERROR,
3234 "Error parsing a wavpack block.\n");
3237 if (pkt_data != data)
3238 av_freep(&pkt_data);
3242 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3244 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3246 av_log(matroska->ctx, AV_LOG_ERROR,
3247 "Error parsing a prores block.\n");
3250 if (pkt_data != data)
3251 av_freep(&pkt_data);
3255 av_init_packet(pkt);
3256 if (pkt_data != data)
3257 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3260 pkt->buf = av_buffer_ref(buf);
3263 res = AVERROR(ENOMEM);
3267 pkt->data = pkt_data;
3268 pkt->size = pkt_size;
3269 pkt->flags = is_keyframe;
3270 pkt->stream_index = st->index;
3272 if (additional_size > 0) {
3273 uint8_t *side_data = av_packet_new_side_data(pkt,
3274 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3275 additional_size + 8);
3277 av_packet_unref(pkt);
3278 return AVERROR(ENOMEM);
3280 AV_WB64(side_data, additional_id);
3281 memcpy(side_data + 8, additional, additional_size);
3284 if (discard_padding) {
3285 uint8_t *side_data = av_packet_new_side_data(pkt,
3286 AV_PKT_DATA_SKIP_SAMPLES,
3289 av_packet_unref(pkt);
3290 return AVERROR(ENOMEM);
3292 discard_padding = av_rescale_q(discard_padding,
3293 (AVRational){1, 1000000000},
3294 (AVRational){1, st->codecpar->sample_rate});
3295 if (discard_padding > 0) {
3296 AV_WL32(side_data + 4, discard_padding);
3298 AV_WL32(side_data, -discard_padding);
3302 if (track->ms_compat)
3303 pkt->dts = timecode;
3305 pkt->pts = timecode;
3307 pkt->duration = lace_duration;
3309 #if FF_API_CONVERGENCE_DURATION
3310 FF_DISABLE_DEPRECATION_WARNINGS
3311 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3312 pkt->convergence_duration = lace_duration;
3314 FF_ENABLE_DEPRECATION_WARNINGS
3317 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3319 av_packet_unref(pkt);
3320 return AVERROR(ENOMEM);
3326 if (pkt_data != data)
3327 av_freep(&pkt_data);
3331 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3332 int size, int64_t pos, uint64_t cluster_time,
3333 uint64_t block_duration, int is_keyframe,
3334 uint8_t *additional, uint64_t additional_id, int additional_size,
3335 int64_t cluster_pos, int64_t discard_padding)
3337 uint64_t timecode = AV_NOPTS_VALUE;
3338 MatroskaTrack *track;
3342 uint32_t *lace_size = NULL;
3343 int n, flags, laces = 0;
3345 int trust_default_duration = 1;
3347 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3353 track = matroska_find_track_by_num(matroska, num);
3354 if (!track || !track->stream) {
3355 av_log(matroska->ctx, AV_LOG_INFO,
3356 "Invalid stream %"PRIu64"\n", num);
3357 return AVERROR_INVALIDDATA;
3358 } else if (size <= 3)
3361 if (st->discard >= AVDISCARD_ALL)
3363 av_assert1(block_duration != AV_NOPTS_VALUE);
3365 block_time = sign_extend(AV_RB16(data), 16);
3369 if (is_keyframe == -1)
3370 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3372 if (cluster_time != (uint64_t) -1 &&
3373 (block_time >= 0 || cluster_time >= -block_time)) {
3374 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3375 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3376 timecode < track->end_timecode)
3377 is_keyframe = 0; /* overlapping subtitles are not key frame */
3379 ff_reduce_index(matroska->ctx, st->index);
3380 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3385 if (matroska->skip_to_keyframe &&
3386 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3387 // Compare signed timecodes. Timecode may be negative due to codec delay
3388 // offset. We don't support timestamps greater than int64_t anyway - see
3390 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3393 matroska->skip_to_keyframe = 0;
3394 else if (!st->skip_to_keyframe) {
3395 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3396 matroska->skip_to_keyframe = 0;
3400 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3401 &lace_size, &laces);
3406 if (track->audio.samplerate == 8000) {
3407 // If this is needed for more codecs, then add them here
3408 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3409 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3410 trust_default_duration = 0;
3414 if (!block_duration && trust_default_duration)
3415 block_duration = track->default_duration * laces / matroska->time_scale;
3417 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3418 track->end_timecode =
3419 FFMAX(track->end_timecode, timecode + block_duration);
3421 for (n = 0; n < laces; n++) {
3422 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3424 if (lace_size[n] > size) {
3425 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3429 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3430 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3431 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3432 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3433 st->codecpar->block_align && track->audio.sub_packet_size) {
3434 res = matroska_parse_rm_audio(matroska, track, st, data,
3440 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3441 res = matroska_parse_webvtt(matroska, track, st,
3443 timecode, lace_duration,
3448 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3449 timecode, lace_duration, pos,
3450 !n ? is_keyframe : 0,
3451 additional, additional_id, additional_size,
3457 if (timecode != AV_NOPTS_VALUE)
3458 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3459 data += lace_size[n];
3460 size -= lace_size[n];
3468 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3470 MatroskaCluster *cluster = &matroska->current_cluster;
3471 MatroskaBlock *block = &cluster->block;
3473 res = ebml_parse(matroska,
3474 matroska_cluster_parsing,
3479 ebml_level_end(matroska);
3480 cluster->pos = avio_tell(matroska->ctx->pb);
3481 /* sizeof the ID which was already read */
3482 if (matroska->current_id)
3484 res = ebml_parse(matroska,
3487 /* Try parsing the block again. */
3489 res = ebml_parse(matroska,
3490 matroska_cluster_parsing,
3494 if (!res && block->bin.size > 0) {
3495 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3496 uint8_t* additional = block->additional.size > 0 ?
3497 block->additional.data : NULL;
3499 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3500 block->bin.size, block->bin.pos,
3501 matroska->current_cluster.timecode,
3502 block->duration, is_keyframe,
3503 additional, block->additional_id,
3504 block->additional.size,
3506 block->discard_padding);
3509 ebml_free(matroska_blockgroup, block);
3510 memset(block, 0, sizeof(*block));
3515 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3517 MatroskaDemuxContext *matroska = s->priv_data;
3520 while (matroska_deliver_packet(matroska, pkt)) {
3521 int64_t pos = avio_tell(matroska->ctx->pb);
3523 return (ret < 0) ? ret : AVERROR_EOF;
3524 if (matroska_parse_cluster(matroska) < 0)
3525 ret = matroska_resync(matroska, pos);
3531 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3532 int64_t timestamp, int flags)
3534 MatroskaDemuxContext *matroska = s->priv_data;
3535 MatroskaTrack *tracks = NULL;
3536 AVStream *st = s->streams[stream_index];
3539 /* Parse the CUES now since we need the index data to seek. */
3540 if (matroska->cues_parsing_deferred > 0) {
3541 matroska->cues_parsing_deferred = 0;
3542 matroska_parse_cues(matroska);
3545 if (!st->nb_index_entries)
3547 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3549 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3550 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3552 matroska->current_id = 0;
3553 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3554 matroska_clear_queue(matroska);
3555 if (matroska_parse_cluster(matroska) < 0)
3560 matroska_clear_queue(matroska);
3561 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3564 tracks = matroska->tracks.elem;
3565 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3566 tracks[i].audio.pkt_cnt = 0;
3567 tracks[i].audio.sub_packet_cnt = 0;
3568 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3569 tracks[i].end_timecode = 0;
3572 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
3573 matroska->current_id = 0;
3574 if (flags & AVSEEK_FLAG_ANY) {
3575 st->skip_to_keyframe = 0;
3576 matroska->skip_to_timecode = timestamp;
3578 st->skip_to_keyframe = 1;
3579 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3581 matroska->skip_to_keyframe = 1;
3583 matroska->num_levels = 0;
3584 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3587 // slightly hackish but allows proper fallback to
3588 // the generic seeking code.
3589 matroska_clear_queue(matroska);
3590 matroska->current_id = 0;
3591 st->skip_to_keyframe =
3592 matroska->skip_to_keyframe = 0;
3594 matroska->num_levels = 0;
3598 static int matroska_read_close(AVFormatContext *s)
3600 MatroskaDemuxContext *matroska = s->priv_data;
3601 MatroskaTrack *tracks = matroska->tracks.elem;
3604 matroska_clear_queue(matroska);
3606 for (n = 0; n < matroska->tracks.nb_elem; n++)
3607 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3608 av_freep(&tracks[n].audio.buf);
3609 ebml_free(matroska_segment, matroska);
3615 int64_t start_time_ns;
3616 int64_t end_time_ns;
3617 int64_t start_offset;
3621 /* This function searches all the Cues and returns the CueDesc corresponding to
3622 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3623 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3625 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3626 MatroskaDemuxContext *matroska = s->priv_data;
3629 int nb_index_entries = s->streams[0]->nb_index_entries;
3630 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3631 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3632 for (i = 1; i < nb_index_entries; i++) {
3633 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3634 index_entries[i].timestamp * matroska->time_scale > ts) {
3639 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3640 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3641 if (i != nb_index_entries - 1) {
3642 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3643 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3645 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3646 // FIXME: this needs special handling for files where Cues appear
3647 // before Clusters. the current logic assumes Cues appear after
3649 cue_desc.end_offset = cues_start - matroska->segment_start;
3654 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3656 MatroskaDemuxContext *matroska = s->priv_data;
3657 int64_t cluster_pos, before_pos;
3659 if (s->streams[0]->nb_index_entries <= 0) return 0;
3660 // seek to the first cluster using cues.
3661 index = av_index_search_timestamp(s->streams[0], 0, 0);
3662 if (index < 0) return 0;
3663 cluster_pos = s->streams[0]->index_entries[index].pos;
3664 before_pos = avio_tell(s->pb);
3666 uint64_t cluster_id, cluster_length;
3669 avio_seek(s->pb, cluster_pos, SEEK_SET);
3670 // read cluster id and length
3671 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3672 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3674 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3677 avio_seek(s->pb, cluster_pos, SEEK_SET);
3678 matroska->current_id = 0;
3679 matroska_clear_queue(matroska);
3680 if (matroska_parse_cluster(matroska) < 0 ||
3684 pkt = &matroska->queue->pkt;
3685 // 4 + read is the length of the cluster id and the cluster length field.
3686 cluster_pos += 4 + read + cluster_length;
3687 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3692 avio_seek(s->pb, before_pos, SEEK_SET);
3696 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3697 double min_buffer, double* buffer,
3698 double* sec_to_download, AVFormatContext *s,
3701 double nano_seconds_per_second = 1000000000.0;
3702 double time_sec = time_ns / nano_seconds_per_second;
3704 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3705 int64_t end_time_ns = time_ns + time_to_search_ns;
3706 double sec_downloaded = 0.0;
3707 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3708 if (desc_curr.start_time_ns == -1)
3710 *sec_to_download = 0.0;
3712 // Check for non cue start time.
3713 if (time_ns > desc_curr.start_time_ns) {
3714 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3715 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3716 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3717 double timeToDownload = (cueBytes * 8.0) / bps;
3719 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3720 *sec_to_download += timeToDownload;
3722 // Check if the search ends within the first cue.
3723 if (desc_curr.end_time_ns >= end_time_ns) {
3724 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3725 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3726 sec_downloaded = percent_to_sub * sec_downloaded;
3727 *sec_to_download = percent_to_sub * *sec_to_download;
3730 if ((sec_downloaded + *buffer) <= min_buffer) {
3734 // Get the next Cue.
3735 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3738 while (desc_curr.start_time_ns != -1) {
3739 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3740 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3741 double desc_sec = desc_ns / nano_seconds_per_second;
3742 double bits = (desc_bytes * 8.0);
3743 double time_to_download = bits / bps;
3745 sec_downloaded += desc_sec - time_to_download;
3746 *sec_to_download += time_to_download;
3748 if (desc_curr.end_time_ns >= end_time_ns) {
3749 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3750 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3751 sec_downloaded = percent_to_sub * sec_downloaded;
3752 *sec_to_download = percent_to_sub * *sec_to_download;
3754 if ((sec_downloaded + *buffer) <= min_buffer)
3759 if ((sec_downloaded + *buffer) <= min_buffer) {
3764 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3766 *buffer = *buffer + sec_downloaded;
3770 /* This function computes the bandwidth of the WebM file with the help of
3771 * buffer_size_after_time_downloaded() function. Both of these functions are
3772 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3773 * Matroska parsing mechanism.
3775 * Returns the bandwidth of the file on success; -1 on error.
3777 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3779 MatroskaDemuxContext *matroska = s->priv_data;
3780 AVStream *st = s->streams[0];
3781 double bandwidth = 0.0;
3784 for (i = 0; i < st->nb_index_entries; i++) {
3785 int64_t prebuffer_ns = 1000000000;
3786 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3787 double nano_seconds_per_second = 1000000000.0;
3788 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3789 double prebuffer_bytes = 0.0;
3790 int64_t temp_prebuffer_ns = prebuffer_ns;
3791 int64_t pre_bytes, pre_ns;
3792 double pre_sec, prebuffer, bits_per_second;
3793 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3795 // Start with the first Cue.
3796 CueDesc desc_end = desc_beg;
3798 // Figure out how much data we have downloaded for the prebuffer. This will
3799 // be used later to adjust the bits per sample to try.
3800 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3801 // Prebuffered the entire Cue.
3802 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3803 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3804 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3806 if (desc_end.start_time_ns == -1) {
3807 // The prebuffer is larger than the duration.
3808 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3810 bits_per_second = 0.0;
3812 // The prebuffer ends in the last Cue. Estimate how much data was
3814 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3815 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3816 pre_sec = pre_ns / nano_seconds_per_second;
3818 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3820 prebuffer = prebuffer_ns / nano_seconds_per_second;
3822 // Set this to 0.0 in case our prebuffer buffers the entire video.
3823 bits_per_second = 0.0;
3825 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3826 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3827 double desc_sec = desc_ns / nano_seconds_per_second;
3828 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3830 // Drop the bps by the percentage of bytes buffered.
3831 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3832 double mod_bits_per_second = calc_bits_per_second * percent;
3834 if (prebuffer < desc_sec) {
3836 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3838 // Add 1 so the bits per second should be a little bit greater than file
3840 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3841 const double min_buffer = 0.0;
3842 double buffer = prebuffer;
3843 double sec_to_download = 0.0;
3845 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3846 min_buffer, &buffer, &sec_to_download,
3850 } else if (rv == 0) {
3851 bits_per_second = (double)(bps);
3856 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3857 } while (desc_end.start_time_ns != -1);
3859 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3861 return (int64_t)bandwidth;
3864 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3866 MatroskaDemuxContext *matroska = s->priv_data;
3867 EbmlList *seekhead_list = &matroska->seekhead;
3868 MatroskaSeekhead *seekhead = seekhead_list->elem;
3870 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3874 // determine cues start and end positions
3875 for (i = 0; i < seekhead_list->nb_elem; i++)
3876 if (seekhead[i].id == MATROSKA_ID_CUES)
3879 if (i >= seekhead_list->nb_elem) return -1;
3881 before_pos = avio_tell(matroska->ctx->pb);
3882 cues_start = seekhead[i].pos + matroska->segment_start;
3883 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3884 // cues_end is computed as cues_start + cues_length + length of the
3885 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3886 // cues_end is inclusive and the above sum is reduced by 1.
3887 uint64_t cues_length, cues_id;
3889 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3890 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3891 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3892 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3895 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3897 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3898 if (cues_start == -1 || cues_end == -1) return -1;
3901 matroska_parse_cues(matroska);
3904 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3907 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3909 // if the file has cues at the start, fix up the init range so tht
3910 // it does not include it
3911 if (cues_start <= init_range)
3912 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3915 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3916 if (bandwidth < 0) return -1;
3917 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3919 // check if all clusters start with key frames
3920 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3922 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3923 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3924 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3925 if (!buf) return -1;
3927 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3928 int ret = snprintf(buf + end, 20,
3929 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3930 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3931 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3932 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3934 return AVERROR_INVALIDDATA;
3938 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3944 static int webm_dash_manifest_read_header(AVFormatContext *s)
3947 int ret = matroska_read_header(s);
3949 MatroskaTrack *tracks;
3950 MatroskaDemuxContext *matroska = s->priv_data;
3952 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3955 if (!s->nb_streams) {
3956 matroska_read_close(s);
3957 av_log(s, AV_LOG_ERROR, "No streams found\n");
3958 return AVERROR_INVALIDDATA;
3961 if (!matroska->is_live) {
3962 buf = av_asprintf("%g", matroska->duration);
3963 if (!buf) return AVERROR(ENOMEM);
3964 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3967 // initialization range
3968 // 5 is the offset of Cluster ID.
3969 init_range = avio_tell(s->pb) - 5;
3970 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3973 // basename of the file
3974 buf = strrchr(s->url, '/');
3975 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
3978 tracks = matroska->tracks.elem;
3979 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3981 // parse the cues and populate Cue related fields
3982 if (!matroska->is_live) {
3983 ret = webm_dash_manifest_cues(s, init_range);
3985 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
3990 // use the bandwidth from the command line if it was provided
3991 if (matroska->bandwidth > 0) {
3992 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
3993 matroska->bandwidth, 0);
3998 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4003 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4004 static const AVOption options[] = {
4005 { "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 },
4006 { "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 },
4010 static const AVClass webm_dash_class = {
4011 .class_name = "WebM DASH Manifest demuxer",
4012 .item_name = av_default_item_name,
4014 .version = LIBAVUTIL_VERSION_INT,
4017 AVInputFormat ff_matroska_demuxer = {
4018 .name = "matroska,webm",
4019 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4020 .extensions = "mkv,mk3d,mka,mks",
4021 .priv_data_size = sizeof(MatroskaDemuxContext),
4022 .read_probe = matroska_probe,
4023 .read_header = matroska_read_header,
4024 .read_packet = matroska_read_packet,
4025 .read_close = matroska_read_close,
4026 .read_seek = matroska_read_seek,
4027 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4030 AVInputFormat ff_webm_dash_manifest_demuxer = {
4031 .name = "webm_dash_manifest",
4032 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4033 .priv_data_size = sizeof(MatroskaDemuxContext),
4034 .read_header = webm_dash_manifest_read_header,
4035 .read_packet = webm_dash_manifest_read_packet,
4036 .read_close = matroska_read_close,
4037 .priv_class = &webm_dash_class,