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 */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
89 typedef const struct EbmlSyntax {
99 const struct EbmlSyntax *n;
103 typedef struct EbmlList {
108 typedef struct EbmlBin {
115 typedef struct Ebml {
120 uint64_t doctype_version;
123 typedef struct MatroskaTrackCompression {
126 } MatroskaTrackCompression;
128 typedef struct MatroskaTrackEncryption {
131 } MatroskaTrackEncryption;
133 typedef struct MatroskaTrackEncoding {
136 MatroskaTrackCompression compression;
137 MatroskaTrackEncryption encryption;
138 } MatroskaTrackEncoding;
140 typedef struct MatroskaMasteringMeta {
149 double max_luminance;
150 double min_luminance;
151 } MatroskaMasteringMeta;
153 typedef struct MatroskaTrackVideoColor {
154 uint64_t matrix_coefficients;
155 uint64_t bits_per_channel;
156 uint64_t chroma_sub_horz;
157 uint64_t chroma_sub_vert;
158 uint64_t cb_sub_horz;
159 uint64_t cb_sub_vert;
160 uint64_t chroma_siting_horz;
161 uint64_t chroma_siting_vert;
163 uint64_t transfer_characteristics;
167 MatroskaMasteringMeta mastering_meta;
168 } MatroskaTrackVideoColor;
170 typedef struct MatroskaTrackVideoProjection {
176 } MatroskaTrackVideoProjection;
178 typedef struct MatroskaTrackVideo {
180 uint64_t display_width;
181 uint64_t display_height;
182 uint64_t pixel_width;
183 uint64_t pixel_height;
185 uint64_t display_unit;
187 uint64_t field_order;
188 uint64_t stereo_mode;
191 MatroskaTrackVideoProjection projection;
192 } MatroskaTrackVideo;
194 typedef struct MatroskaTrackAudio {
196 double out_samplerate;
200 /* real audio header (extracted from extradata) */
207 uint64_t buf_timecode;
209 } MatroskaTrackAudio;
211 typedef struct MatroskaTrackPlane {
214 } MatroskaTrackPlane;
216 typedef struct MatroskaTrackOperation {
217 EbmlList combine_planes;
218 } MatroskaTrackOperation;
220 typedef struct MatroskaTrack {
229 uint64_t default_duration;
230 uint64_t flag_default;
231 uint64_t flag_forced;
232 uint64_t seek_preroll;
233 MatroskaTrackVideo video;
234 MatroskaTrackAudio audio;
235 MatroskaTrackOperation operation;
237 uint64_t codec_delay;
238 uint64_t codec_delay_in_track_tb;
241 int64_t end_timecode;
243 uint64_t max_block_additional_id;
245 uint32_t palette[AVPALETTE_COUNT];
249 typedef struct MatroskaAttachment {
256 } MatroskaAttachment;
258 typedef struct MatroskaChapter {
267 typedef struct MatroskaIndexPos {
272 typedef struct MatroskaIndex {
277 typedef struct MatroskaTag {
285 typedef struct MatroskaTagTarget {
293 typedef struct MatroskaTags {
294 MatroskaTagTarget target;
298 typedef struct MatroskaSeekhead {
303 typedef struct MatroskaLevel {
308 typedef struct MatroskaBlock {
313 uint64_t additional_id;
315 int64_t discard_padding;
318 typedef struct MatroskaCluster {
324 typedef struct MatroskaLevel1Element {
328 } MatroskaLevel1Element;
330 typedef struct MatroskaDemuxContext {
331 const AVClass *class;
332 AVFormatContext *ctx;
336 MatroskaLevel levels[EBML_MAX_DEPTH];
345 EbmlList attachments;
351 /* byte position of the segment inside the stream */
352 int64_t segment_start;
354 /* the packet queue */
356 AVPacketList *queue_end;
360 /* What to skip before effectively reading a packet. */
361 int skip_to_keyframe;
362 uint64_t skip_to_timecode;
364 /* File has a CUES element, but we defer parsing until it is needed. */
365 int cues_parsing_deferred;
367 /* Level1 elements and whether they were read yet */
368 MatroskaLevel1Element level1_elems[64];
369 int num_level1_elems;
371 MatroskaCluster current_cluster;
373 /* WebM DASH Manifest live flag */
376 /* Bandwidth value for WebM DASH Manifest */
378 } MatroskaDemuxContext;
380 static const EbmlSyntax ebml_header[] = {
381 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
382 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
383 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
384 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
385 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
386 { EBML_ID_EBMLVERSION, EBML_NONE },
387 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
391 static const EbmlSyntax ebml_syntax[] = {
392 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
396 static const EbmlSyntax matroska_info[] = {
397 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
398 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
399 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
400 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
401 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
402 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
403 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
407 static const EbmlSyntax matroska_mastering_meta[] = {
408 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
421 static const EbmlSyntax matroska_track_video_color[] = {
422 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
423 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
434 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
439 static const EbmlSyntax matroska_track_video_projection[] = {
440 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
441 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
448 static const EbmlSyntax matroska_track_video[] = {
449 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
450 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
451 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
452 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
453 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
454 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
455 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
456 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
457 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
458 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
462 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
463 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
464 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
466 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
470 static const EbmlSyntax matroska_track_audio[] = {
471 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
472 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
473 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
474 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
478 static const EbmlSyntax matroska_track_encoding_compression[] = {
479 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
480 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
484 static const EbmlSyntax matroska_track_encoding_encryption[] = {
485 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
486 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
487 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
494 static const EbmlSyntax matroska_track_encoding[] = {
495 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
496 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
497 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
498 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
499 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
503 static const EbmlSyntax matroska_track_encodings[] = {
504 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
508 static const EbmlSyntax matroska_track_plane[] = {
509 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
510 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
514 static const EbmlSyntax matroska_track_combine_planes[] = {
515 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
519 static const EbmlSyntax matroska_track_operation[] = {
520 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
524 static const EbmlSyntax matroska_track[] = {
525 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
526 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
527 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
528 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
529 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
530 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
531 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
532 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
533 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
534 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
535 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
536 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
537 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
538 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
539 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
540 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
541 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
542 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
543 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
544 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
545 { MATROSKA_ID_CODECNAME, EBML_NONE },
546 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
547 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
548 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
549 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
550 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
554 static const EbmlSyntax matroska_tracks[] = {
555 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
559 static const EbmlSyntax matroska_attachment[] = {
560 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
561 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
562 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
563 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
564 { MATROSKA_ID_FILEDESC, EBML_NONE },
568 static const EbmlSyntax matroska_attachments[] = {
569 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
573 static const EbmlSyntax matroska_chapter_display[] = {
574 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
575 { MATROSKA_ID_CHAPLANG, EBML_NONE },
576 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
580 static const EbmlSyntax matroska_chapter_entry[] = {
581 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
582 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
584 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
585 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
586 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
587 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
588 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
592 static const EbmlSyntax matroska_chapter[] = {
593 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
594 { MATROSKA_ID_EDITIONUID, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
601 static const EbmlSyntax matroska_chapters[] = {
602 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
606 static const EbmlSyntax matroska_index_pos[] = {
607 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
608 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
609 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
610 { MATROSKA_ID_CUEDURATION, EBML_NONE },
611 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
615 static const EbmlSyntax matroska_index_entry[] = {
616 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
617 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
621 static const EbmlSyntax matroska_index[] = {
622 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
626 static const EbmlSyntax matroska_simpletag[] = {
627 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
628 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
629 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
630 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
631 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
636 static const EbmlSyntax matroska_tagtargets[] = {
637 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
638 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
639 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
640 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
641 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
645 static const EbmlSyntax matroska_tag[] = {
646 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
647 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
651 static const EbmlSyntax matroska_tags[] = {
652 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
656 static const EbmlSyntax matroska_seekhead_entry[] = {
657 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
658 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
662 static const EbmlSyntax matroska_seekhead[] = {
663 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
667 static const EbmlSyntax matroska_segment[] = {
668 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
669 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
670 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
671 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
672 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
673 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
674 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
675 { MATROSKA_ID_CLUSTER, EBML_STOP },
679 static const EbmlSyntax matroska_segments[] = {
680 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
684 static const EbmlSyntax matroska_blockmore[] = {
685 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
686 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
690 static const EbmlSyntax matroska_blockadditions[] = {
691 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
695 static const EbmlSyntax matroska_blockgroup[] = {
696 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
697 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
698 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
699 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
700 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
701 { MATROSKA_ID_CODECSTATE, EBML_NONE },
702 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706 static const EbmlSyntax matroska_cluster_parsing[] = {
707 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
708 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
709 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
710 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
711 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
712 { MATROSKA_ID_INFO, EBML_NONE },
713 { MATROSKA_ID_CUES, EBML_NONE },
714 { MATROSKA_ID_TAGS, EBML_NONE },
715 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
716 { MATROSKA_ID_CLUSTER, EBML_STOP },
720 static const EbmlSyntax matroska_cluster[] = {
721 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
722 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
723 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
724 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
725 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
729 static const EbmlSyntax matroska_clusters[] = {
730 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
731 { MATROSKA_ID_INFO, EBML_NONE },
732 { MATROSKA_ID_CUES, EBML_NONE },
733 { MATROSKA_ID_TAGS, EBML_NONE },
734 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
738 static const char *const matroska_doctypes[] = { "matroska", "webm" };
740 static int matroska_read_close(AVFormatContext *s);
743 * This function prepares the status for parsing of level 1 elements.
745 static int matroska_reset_status(MatroskaDemuxContext *matroska,
746 uint32_t id, int64_t position)
749 int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
754 matroska->current_id = id;
755 matroska->num_levels = 1;
756 matroska->current_cluster.pos = 0;
761 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
763 AVIOContext *pb = matroska->ctx->pb;
765 matroska->current_id = 0;
766 matroska->num_levels = 0;
768 /* Try to seek to the last position to resync from. If this doesn't work,
769 * we resync from the earliest position available: The start of the buffer. */
770 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
771 av_log(matroska->ctx, AV_LOG_WARNING,
772 "Seek to desired resync point failed. Seeking to "
773 "earliest point available instead.\n");
774 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
775 last_pos + 1), SEEK_SET);
780 // try to find a toplevel element
781 while (!avio_feof(pb)) {
782 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
783 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
784 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
785 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
786 matroska->current_id = id;
789 id = (id << 8) | avio_r8(pb);
793 return pb->error ? pb->error : AVERROR_EOF;
797 * Return: Whether we reached the end of a level in the hierarchy or not.
799 static int ebml_level_end(MatroskaDemuxContext *matroska)
801 AVIOContext *pb = matroska->ctx->pb;
802 int64_t pos = avio_tell(pb);
804 if (matroska->num_levels > 0) {
805 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
806 if (pos - level->start >= level->length || matroska->current_id) {
807 matroska->num_levels--;
811 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
815 * Read: an "EBML number", which is defined as a variable-length
816 * array of bytes. The first byte indicates the length by giving a
817 * number of 0-bits followed by a one. The position of the first
818 * "one" bit inside the first byte indicates the length of this
820 * Returns: number of bytes read, < 0 on error
822 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
823 int max_size, uint64_t *number, int eof_forbidden)
829 /* The first byte tells us the length in bytes - except when it is zero. */
834 /* get the length of the EBML number */
835 read = 8 - ff_log2_tab[total];
837 if (!total || read > max_size) {
838 pos = avio_tell(pb) - 1;
840 av_log(matroska->ctx, AV_LOG_ERROR,
841 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
842 "of an EBML number\n", pos, pos);
844 av_log(matroska->ctx, AV_LOG_ERROR,
845 "Length %d indicated by an EBML number's first byte 0x%02x "
846 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
847 read, (uint8_t) total, pos, pos, max_size);
849 return AVERROR_INVALIDDATA;
852 /* read out length */
853 total ^= 1 << ff_log2_tab[total];
855 total = (total << 8) | avio_r8(pb);
857 if (pb->eof_reached) {
869 av_log(matroska->ctx, AV_LOG_ERROR,
870 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
875 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
876 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
883 * Read a EBML length value.
884 * This needs special handling for the "unknown length" case which has multiple
887 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
890 int res = ebml_read_num(matroska, pb, 8, number, 1);
891 if (res > 0 && *number + 1 == 1ULL << (7 * res))
892 *number = EBML_UNKNOWN_LENGTH;
897 * Read the next element as an unsigned int.
898 * Returns NEEDS_CHECKING.
900 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
904 /* big-endian ordering; build up number */
907 *num = (*num << 8) | avio_r8(pb);
909 return NEEDS_CHECKING;
913 * Read the next element as a signed int.
914 * Returns NEEDS_CHECKING.
916 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
923 *num = sign_extend(avio_r8(pb), 8);
925 /* big-endian ordering; build up number */
927 *num = ((uint64_t)*num << 8) | avio_r8(pb);
930 return NEEDS_CHECKING;
934 * Read the next element as a float.
935 * Returns NEEDS_CHECKING or < 0 on obvious failure.
937 static int ebml_read_float(AVIOContext *pb, int size, double *num)
942 *num = av_int2float(avio_rb32(pb));
944 *num = av_int2double(avio_rb64(pb));
946 return AVERROR_INVALIDDATA;
948 return NEEDS_CHECKING;
952 * Read the next element as an ASCII string.
953 * 0 is success, < 0 or NEEDS_CHECKING is failure.
955 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
960 /* EBML strings are usually not 0-terminated, so we allocate one
961 * byte more, read the string and NULL-terminate it ourselves. */
962 if (!(res = av_malloc(size + 1)))
963 return AVERROR(ENOMEM);
964 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
966 return ret < 0 ? ret : NEEDS_CHECKING;
976 * Read the next element as binary data.
977 * 0 is success, < 0 or NEEDS_CHECKING is failure.
979 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
983 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
986 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
988 bin->data = bin->buf->data;
990 bin->pos = avio_tell(pb);
991 if ((ret = avio_read(pb, bin->data, length)) != length) {
992 av_buffer_unref(&bin->buf);
995 return ret < 0 ? ret : NEEDS_CHECKING;
1002 * Read the next element, but only the header. The contents
1003 * are supposed to be sub-elements which can be read separately.
1004 * 0 is success, < 0 is failure.
1006 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
1008 AVIOContext *pb = matroska->ctx->pb;
1009 MatroskaLevel *level;
1011 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1012 av_log(matroska->ctx, AV_LOG_ERROR,
1013 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1014 return AVERROR(ENOSYS);
1017 level = &matroska->levels[matroska->num_levels++];
1018 level->start = avio_tell(pb);
1019 level->length = length;
1025 * Read signed/unsigned "EBML" numbers.
1026 * Return: number of bytes processed, < 0 on error
1028 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1029 uint8_t *data, uint32_t size, uint64_t *num)
1032 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1033 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1037 * Same as above, but signed.
1039 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1040 uint8_t *data, uint32_t size, int64_t *num)
1045 /* read as unsigned number first */
1046 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1049 /* make signed (weird way) */
1050 *num = unum - ((1LL << (7 * res - 1)) - 1);
1055 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1056 EbmlSyntax *syntax, void *data);
1058 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1059 uint32_t id, void *data)
1062 for (i = 0; syntax[i].id; i++)
1063 if (id == syntax[i].id)
1065 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1066 matroska->num_levels > 0 &&
1067 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1068 return 0; // we reached the end of an unknown size cluster
1069 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1070 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1072 return ebml_parse_elem(matroska, &syntax[i], data);
1075 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1078 if (!matroska->current_id) {
1080 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id, 0);
1082 // in live mode, finish parsing if EOF is reached.
1083 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1084 res == AVERROR_EOF) ? 1 : res;
1086 matroska->current_id = id | 1 << 7 * res;
1088 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1091 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1096 for (i = 0; syntax[i].id; i++)
1097 switch (syntax[i].type) {
1099 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1102 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1105 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1109 // the default may be NULL
1110 if (syntax[i].def.s) {
1111 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1112 *dst = av_strdup(syntax[i].def.s);
1114 return AVERROR(ENOMEM);
1119 while (!res && !ebml_level_end(matroska))
1120 res = ebml_parse(matroska, syntax, data);
1125 static int is_ebml_id_valid(uint32_t id)
1127 // Due to endian nonsense in Matroska, the highest byte with any bits set
1128 // will contain the leading length bit. This bit in turn identifies the
1129 // total byte length of the element by its position within the byte.
1130 unsigned int bits = av_log2(id);
1131 return id && (bits + 7) / 8 == (8 - bits % 8);
1135 * Allocate and return the entry for the level1 element with the given ID. If
1136 * an entry already exists, return the existing entry.
1138 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1142 MatroskaLevel1Element *elem;
1144 if (!is_ebml_id_valid(id))
1147 // Some files link to all clusters; useless.
1148 if (id == MATROSKA_ID_CLUSTER)
1151 // There can be multiple seekheads.
1152 if (id != MATROSKA_ID_SEEKHEAD) {
1153 for (i = 0; i < matroska->num_level1_elems; i++) {
1154 if (matroska->level1_elems[i].id == id)
1155 return &matroska->level1_elems[i];
1159 // Only a completely broken file would have more elements.
1160 // It also provides a low-effort way to escape from circular seekheads
1161 // (every iteration will add a level1 entry).
1162 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1163 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1167 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1168 *elem = (MatroskaLevel1Element){.id = id};
1173 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1174 EbmlSyntax *syntax, void *data)
1176 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1180 // max. 16 MB for strings
1181 [EBML_STR] = 0x1000000,
1182 [EBML_UTF8] = 0x1000000,
1183 // max. 256 MB for binary data
1184 [EBML_BIN] = 0x10000000,
1185 // no limits for anything else
1187 AVIOContext *pb = matroska->ctx->pb;
1188 uint32_t id = syntax->id;
1192 MatroskaLevel1Element *level1_elem;
1194 data = (char *) data + syntax->data_offset;
1195 if (syntax->list_elem_size) {
1196 EbmlList *list = data;
1197 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1199 return AVERROR(ENOMEM);
1200 list->elem = newelem;
1201 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1202 memset(data, 0, syntax->list_elem_size);
1206 if (syntax->type != EBML_STOP) {
1207 matroska->current_id = 0;
1208 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1210 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1211 av_log(matroska->ctx, AV_LOG_ERROR,
1212 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1213 length, max_lengths[syntax->type], syntax->type);
1214 return AVERROR_INVALIDDATA;
1216 if (matroska->num_levels > 0) {
1217 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1218 AVIOContext *pb = matroska->ctx->pb;
1219 int64_t pos = avio_tell(pb);
1221 if (length != EBML_UNKNOWN_LENGTH &&
1222 level->length != EBML_UNKNOWN_LENGTH) {
1223 uint64_t elem_end = pos + length,
1224 level_end = level->start + level->length;
1226 if (level_end < elem_end) {
1227 av_log(matroska->ctx, AV_LOG_ERROR,
1228 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1229 "containing master element ending at 0x%"PRIx64"\n",
1230 pos, elem_end, level_end);
1231 return AVERROR_INVALIDDATA;
1233 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1234 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1235 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1236 return AVERROR_INVALIDDATA;
1237 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1238 // According to the specifications only clusters and segments
1239 // are allowed to be unknown-sized.
1240 av_log(matroska->ctx, AV_LOG_ERROR,
1241 "Found unknown-sized element other than a cluster at "
1242 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1243 return AVERROR_INVALIDDATA;
1248 switch (syntax->type) {
1250 res = ebml_read_uint(pb, length, data);
1253 res = ebml_read_sint(pb, length, data);
1256 res = ebml_read_float(pb, length, data);
1260 res = ebml_read_ascii(pb, length, data);
1263 res = ebml_read_binary(pb, length, data);
1267 if ((res = ebml_read_master(matroska, length)) < 0)
1269 if (id == MATROSKA_ID_SEGMENT)
1270 matroska->segment_start = avio_tell(matroska->ctx->pb);
1271 if (id == MATROSKA_ID_CUES)
1272 matroska->cues_parsing_deferred = 0;
1273 if (syntax->type == EBML_LEVEL1 &&
1274 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1275 if (level1_elem->parsed)
1276 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1277 level1_elem->parsed = 1;
1279 return ebml_parse_nest(matroska, syntax->def.n, data);
1285 if (ffio_limit(pb, length) != length) {
1286 // ffio_limit emits its own error message,
1287 // so we don't have to.
1288 return AVERROR(EIO);
1290 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1291 // avio_skip might take us past EOF. We check for this
1292 // by skipping only length - 1 bytes, reading a byte and
1293 // checking the error flags. This is done in order to check
1294 // that the element has been properly skipped even when
1295 // no filesize (that ffio_limit relies on) is available.
1297 res = NEEDS_CHECKING;
1304 if (res == NEEDS_CHECKING) {
1305 if (pb->eof_reached) {
1314 if (res == AVERROR_INVALIDDATA)
1315 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1316 else if (res == AVERROR(EIO))
1317 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1318 else if (res == AVERROR_EOF) {
1319 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1326 static void ebml_free(EbmlSyntax *syntax, void *data)
1329 for (i = 0; syntax[i].id; i++) {
1330 void *data_off = (char *) data + syntax[i].data_offset;
1331 switch (syntax[i].type) {
1337 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1341 if (syntax[i].list_elem_size) {
1342 EbmlList *list = data_off;
1343 char *ptr = list->elem;
1344 for (j = 0; j < list->nb_elem;
1345 j++, ptr += syntax[i].list_elem_size)
1346 ebml_free(syntax[i].def.n, ptr);
1347 av_freep(&list->elem);
1350 ebml_free(syntax[i].def.n, data_off);
1360 static int matroska_probe(const AVProbeData *p)
1363 int len_mask = 0x80, size = 1, n = 1, i;
1366 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1369 /* length of header */
1371 while (size <= 8 && !(total & len_mask)) {
1377 total &= (len_mask - 1);
1379 total = (total << 8) | p->buf[4 + n++];
1381 /* Does the probe data contain the whole header? */
1382 if (p->buf_size < 4 + size + total)
1385 /* The header should contain a known document type. For now,
1386 * we don't parse the whole header but simply check for the
1387 * availability of that array of characters inside the header.
1388 * Not fully fool-proof, but good enough. */
1389 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1390 size_t probelen = strlen(matroska_doctypes[i]);
1391 if (total < probelen)
1393 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1394 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1395 return AVPROBE_SCORE_MAX;
1398 // probably valid EBML header but no recognized doctype
1399 return AVPROBE_SCORE_EXTENSION;
1402 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1405 MatroskaTrack *tracks = matroska->tracks.elem;
1408 for (i = 0; i < matroska->tracks.nb_elem; i++)
1409 if (tracks[i].num == num)
1412 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1416 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1417 MatroskaTrack *track)
1419 MatroskaTrackEncoding *encodings = track->encodings.elem;
1420 uint8_t *data = *buf;
1421 int isize = *buf_size;
1422 uint8_t *pkt_data = NULL;
1423 uint8_t av_unused *newpktdata;
1424 int pkt_size = isize;
1428 if (pkt_size >= 10000000U)
1429 return AVERROR_INVALIDDATA;
1431 switch (encodings[0].compression.algo) {
1432 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1434 int header_size = encodings[0].compression.settings.size;
1435 uint8_t *header = encodings[0].compression.settings.data;
1437 if (header_size && !header) {
1438 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1445 pkt_size = isize + header_size;
1446 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1448 return AVERROR(ENOMEM);
1450 memcpy(pkt_data, header, header_size);
1451 memcpy(pkt_data + header_size, data, isize);
1455 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1457 olen = pkt_size *= 3;
1458 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1459 + AV_INPUT_BUFFER_PADDING_SIZE);
1461 result = AVERROR(ENOMEM);
1464 pkt_data = newpktdata;
1465 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1466 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1468 result = AVERROR_INVALIDDATA;
1475 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1477 z_stream zstream = { 0 };
1478 if (inflateInit(&zstream) != Z_OK)
1480 zstream.next_in = data;
1481 zstream.avail_in = isize;
1484 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1486 inflateEnd(&zstream);
1487 result = AVERROR(ENOMEM);
1490 pkt_data = newpktdata;
1491 zstream.avail_out = pkt_size - zstream.total_out;
1492 zstream.next_out = pkt_data + zstream.total_out;
1493 result = inflate(&zstream, Z_NO_FLUSH);
1494 } while (result == Z_OK && pkt_size < 10000000);
1495 pkt_size = zstream.total_out;
1496 inflateEnd(&zstream);
1497 if (result != Z_STREAM_END) {
1498 if (result == Z_MEM_ERROR)
1499 result = AVERROR(ENOMEM);
1501 result = AVERROR_INVALIDDATA;
1508 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1510 bz_stream bzstream = { 0 };
1511 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1513 bzstream.next_in = data;
1514 bzstream.avail_in = isize;
1517 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1519 BZ2_bzDecompressEnd(&bzstream);
1520 result = AVERROR(ENOMEM);
1523 pkt_data = newpktdata;
1524 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1525 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1526 result = BZ2_bzDecompress(&bzstream);
1527 } while (result == BZ_OK && pkt_size < 10000000);
1528 pkt_size = bzstream.total_out_lo32;
1529 BZ2_bzDecompressEnd(&bzstream);
1530 if (result != BZ_STREAM_END) {
1531 if (result == BZ_MEM_ERROR)
1532 result = AVERROR(ENOMEM);
1534 result = AVERROR_INVALIDDATA;
1541 return AVERROR_INVALIDDATA;
1544 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1547 *buf_size = pkt_size;
1555 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1556 AVDictionary **metadata, char *prefix)
1558 MatroskaTag *tags = list->elem;
1562 for (i = 0; i < list->nb_elem; i++) {
1563 const char *lang = tags[i].lang &&
1564 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1566 if (!tags[i].name) {
1567 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1571 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1573 av_strlcpy(key, tags[i].name, sizeof(key));
1574 if (tags[i].def || !lang) {
1575 av_dict_set(metadata, key, tags[i].string, 0);
1576 if (tags[i].sub.nb_elem)
1577 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1580 av_strlcat(key, "-", sizeof(key));
1581 av_strlcat(key, lang, sizeof(key));
1582 av_dict_set(metadata, key, tags[i].string, 0);
1583 if (tags[i].sub.nb_elem)
1584 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1587 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1590 static void matroska_convert_tags(AVFormatContext *s)
1592 MatroskaDemuxContext *matroska = s->priv_data;
1593 MatroskaTags *tags = matroska->tags.elem;
1596 for (i = 0; i < matroska->tags.nb_elem; i++) {
1597 if (tags[i].target.attachuid) {
1598 MatroskaAttachment *attachment = matroska->attachments.elem;
1600 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1601 if (attachment[j].uid == tags[i].target.attachuid &&
1602 attachment[j].stream) {
1603 matroska_convert_tag(s, &tags[i].tag,
1604 &attachment[j].stream->metadata, NULL);
1609 av_log(NULL, AV_LOG_WARNING,
1610 "The tags at index %d refer to a "
1611 "non-existent attachment %"PRId64".\n",
1612 i, tags[i].target.attachuid);
1614 } else if (tags[i].target.chapteruid) {
1615 MatroskaChapter *chapter = matroska->chapters.elem;
1617 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1618 if (chapter[j].uid == tags[i].target.chapteruid &&
1619 chapter[j].chapter) {
1620 matroska_convert_tag(s, &tags[i].tag,
1621 &chapter[j].chapter->metadata, NULL);
1626 av_log(NULL, AV_LOG_WARNING,
1627 "The tags at index %d refer to a non-existent chapter "
1629 i, tags[i].target.chapteruid);
1631 } else if (tags[i].target.trackuid) {
1632 MatroskaTrack *track = matroska->tracks.elem;
1634 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1635 if (track[j].uid == tags[i].target.trackuid &&
1637 matroska_convert_tag(s, &tags[i].tag,
1638 &track[j].stream->metadata, NULL);
1643 av_log(NULL, AV_LOG_WARNING,
1644 "The tags at index %d refer to a non-existent track "
1646 i, tags[i].target.trackuid);
1649 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1650 tags[i].target.type);
1655 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1658 uint32_t saved_id = matroska->current_id;
1659 int64_t before_pos = avio_tell(matroska->ctx->pb);
1660 MatroskaLevel level;
1665 offset = pos + matroska->segment_start;
1666 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1667 /* We don't want to lose our seekhead level, so we add
1668 * a dummy. This is a crude hack. */
1669 if (matroska->num_levels == EBML_MAX_DEPTH) {
1670 av_log(matroska->ctx, AV_LOG_INFO,
1671 "Max EBML element depth (%d) reached, "
1672 "cannot parse further.\n", EBML_MAX_DEPTH);
1673 ret = AVERROR_INVALIDDATA;
1676 level.length = EBML_UNKNOWN_LENGTH;
1677 matroska->levels[matroska->num_levels] = level;
1678 matroska->num_levels++;
1679 matroska->current_id = 0;
1681 ret = ebml_parse(matroska, matroska_segment, matroska);
1683 /* remove dummy level */
1684 while (matroska->num_levels) {
1685 uint64_t length = matroska->levels[--matroska->num_levels].length;
1686 if (length == EBML_UNKNOWN_LENGTH)
1692 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1693 matroska->current_id = saved_id;
1698 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1700 EbmlList *seekhead_list = &matroska->seekhead;
1703 // we should not do any seeking in the streaming case
1704 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1707 for (i = 0; i < seekhead_list->nb_elem; i++) {
1708 MatroskaSeekhead *seekheads = seekhead_list->elem;
1709 uint32_t id = seekheads[i].id;
1710 uint64_t pos = seekheads[i].pos;
1712 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1713 if (!elem || elem->parsed)
1718 // defer cues parsing until we actually need cue data.
1719 if (id == MATROSKA_ID_CUES)
1722 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1723 // mark index as broken
1724 matroska->cues_parsing_deferred = -1;
1732 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1734 EbmlList *index_list;
1735 MatroskaIndex *index;
1736 uint64_t index_scale = 1;
1739 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1742 index_list = &matroska->index;
1743 index = index_list->elem;
1744 if (index_list->nb_elem < 2)
1746 if (index[1].time > 1E14 / matroska->time_scale) {
1747 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1750 for (i = 0; i < index_list->nb_elem; i++) {
1751 EbmlList *pos_list = &index[i].pos;
1752 MatroskaIndexPos *pos = pos_list->elem;
1753 for (j = 0; j < pos_list->nb_elem; j++) {
1754 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1756 if (track && track->stream)
1757 av_add_index_entry(track->stream,
1758 pos[j].pos + matroska->segment_start,
1759 index[i].time / index_scale, 0, 0,
1765 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1768 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1771 for (i = 0; i < matroska->num_level1_elems; i++) {
1772 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1773 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1774 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1775 matroska->cues_parsing_deferred = -1;
1781 matroska_add_index_entries(matroska);
1784 static int matroska_aac_profile(char *codec_id)
1786 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1789 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1790 if (strstr(codec_id, aac_profiles[profile]))
1795 static int matroska_aac_sri(int samplerate)
1799 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1800 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1805 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1807 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1808 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1811 static int matroska_parse_flac(AVFormatContext *s,
1812 MatroskaTrack *track,
1815 AVStream *st = track->stream;
1816 uint8_t *p = track->codec_priv.data;
1817 int size = track->codec_priv.size;
1819 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1820 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1821 track->codec_priv.size = 0;
1825 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1827 p += track->codec_priv.size;
1828 size -= track->codec_priv.size;
1830 /* parse the remaining metadata blocks if present */
1832 int block_last, block_type, block_size;
1834 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1838 if (block_size > size)
1841 /* check for the channel mask */
1842 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1843 AVDictionary *dict = NULL;
1844 AVDictionaryEntry *chmask;
1846 ff_vorbis_comment(s, &dict, p, block_size, 0);
1847 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1849 uint64_t mask = strtol(chmask->value, NULL, 0);
1850 if (!mask || mask & ~0x3ffffULL) {
1851 av_log(s, AV_LOG_WARNING,
1852 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1854 st->codecpar->channel_layout = mask;
1856 av_dict_free(&dict);
1866 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1868 int major, minor, micro, bttb = 0;
1870 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1871 * this function, and fixed in 57.52 */
1872 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1873 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1875 switch (field_order) {
1876 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1877 return AV_FIELD_PROGRESSIVE;
1878 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1879 return AV_FIELD_UNKNOWN;
1880 case MATROSKA_VIDEO_FIELDORDER_TT:
1882 case MATROSKA_VIDEO_FIELDORDER_BB:
1884 case MATROSKA_VIDEO_FIELDORDER_BT:
1885 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1886 case MATROSKA_VIDEO_FIELDORDER_TB:
1887 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1889 return AV_FIELD_UNKNOWN;
1893 static void mkv_stereo_mode_display_mul(int stereo_mode,
1894 int *h_width, int *h_height)
1896 switch (stereo_mode) {
1897 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1898 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1899 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1900 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1901 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1903 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1904 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1905 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1906 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1909 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1910 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1911 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1912 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1918 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1919 const MatroskaTrackVideoColor *color = track->video.color.elem;
1920 const MatroskaMasteringMeta *mastering_meta;
1921 int has_mastering_primaries, has_mastering_luminance;
1923 if (!track->video.color.nb_elem)
1926 mastering_meta = &color->mastering_meta;
1927 // Mastering primaries are CIE 1931 coords, and must be > 0.
1928 has_mastering_primaries =
1929 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1930 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1931 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1932 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1933 has_mastering_luminance = mastering_meta->max_luminance > 0;
1935 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1936 st->codecpar->color_space = color->matrix_coefficients;
1937 if (color->primaries != AVCOL_PRI_RESERVED &&
1938 color->primaries != AVCOL_PRI_RESERVED0)
1939 st->codecpar->color_primaries = color->primaries;
1940 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1941 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1942 st->codecpar->color_trc = color->transfer_characteristics;
1943 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1944 color->range <= AVCOL_RANGE_JPEG)
1945 st->codecpar->color_range = color->range;
1946 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1947 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1948 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1949 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1950 st->codecpar->chroma_location =
1951 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1952 (color->chroma_siting_vert - 1) << 7);
1954 if (color->max_cll && color->max_fall) {
1957 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1959 return AVERROR(ENOMEM);
1960 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1961 (uint8_t *)metadata, size);
1963 av_freep(&metadata);
1966 metadata->MaxCLL = color->max_cll;
1967 metadata->MaxFALL = color->max_fall;
1970 if (has_mastering_primaries || has_mastering_luminance) {
1971 // Use similar rationals as other standards.
1972 const int chroma_den = 50000;
1973 const int luma_den = 10000;
1974 AVMasteringDisplayMetadata *metadata =
1975 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1976 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1977 sizeof(AVMasteringDisplayMetadata));
1979 return AVERROR(ENOMEM);
1981 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1982 if (has_mastering_primaries) {
1983 metadata->display_primaries[0][0] = av_make_q(
1984 round(mastering_meta->r_x * chroma_den), chroma_den);
1985 metadata->display_primaries[0][1] = av_make_q(
1986 round(mastering_meta->r_y * chroma_den), chroma_den);
1987 metadata->display_primaries[1][0] = av_make_q(
1988 round(mastering_meta->g_x * chroma_den), chroma_den);
1989 metadata->display_primaries[1][1] = av_make_q(
1990 round(mastering_meta->g_y * chroma_den), chroma_den);
1991 metadata->display_primaries[2][0] = av_make_q(
1992 round(mastering_meta->b_x * chroma_den), chroma_den);
1993 metadata->display_primaries[2][1] = av_make_q(
1994 round(mastering_meta->b_y * chroma_den), chroma_den);
1995 metadata->white_point[0] = av_make_q(
1996 round(mastering_meta->white_x * chroma_den), chroma_den);
1997 metadata->white_point[1] = av_make_q(
1998 round(mastering_meta->white_y * chroma_den), chroma_den);
1999 metadata->has_primaries = 1;
2001 if (has_mastering_luminance) {
2002 metadata->max_luminance = av_make_q(
2003 round(mastering_meta->max_luminance * luma_den), luma_den);
2004 metadata->min_luminance = av_make_q(
2005 round(mastering_meta->min_luminance * luma_den), luma_den);
2006 metadata->has_luminance = 1;
2012 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2013 AVSphericalMapping *spherical;
2014 enum AVSphericalProjection projection;
2015 size_t spherical_size;
2016 uint32_t l = 0, t = 0, r = 0, b = 0;
2017 uint32_t padding = 0;
2021 bytestream2_init(&gb, track->video.projection.private.data,
2022 track->video.projection.private.size);
2024 if (bytestream2_get_byte(&gb) != 0) {
2025 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2029 bytestream2_skip(&gb, 3); // flags
2031 switch (track->video.projection.type) {
2032 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2033 if (track->video.projection.private.size == 20) {
2034 t = bytestream2_get_be32(&gb);
2035 b = bytestream2_get_be32(&gb);
2036 l = bytestream2_get_be32(&gb);
2037 r = bytestream2_get_be32(&gb);
2039 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2040 av_log(NULL, AV_LOG_ERROR,
2041 "Invalid bounding rectangle coordinates "
2042 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2044 return AVERROR_INVALIDDATA;
2046 } else if (track->video.projection.private.size != 0) {
2047 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2048 return AVERROR_INVALIDDATA;
2051 if (l || t || r || b)
2052 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2054 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2056 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2057 if (track->video.projection.private.size < 4) {
2058 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2059 return AVERROR_INVALIDDATA;
2060 } else if (track->video.projection.private.size == 12) {
2061 uint32_t layout = bytestream2_get_be32(&gb);
2063 av_log(NULL, AV_LOG_WARNING,
2064 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2067 projection = AV_SPHERICAL_CUBEMAP;
2068 padding = bytestream2_get_be32(&gb);
2070 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2071 return AVERROR_INVALIDDATA;
2074 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2075 /* No Spherical metadata */
2078 av_log(NULL, AV_LOG_WARNING,
2079 "Unknown spherical metadata type %"PRIu64"\n",
2080 track->video.projection.type);
2084 spherical = av_spherical_alloc(&spherical_size);
2086 return AVERROR(ENOMEM);
2088 spherical->projection = projection;
2090 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2091 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2092 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2094 spherical->padding = padding;
2096 spherical->bound_left = l;
2097 spherical->bound_top = t;
2098 spherical->bound_right = r;
2099 spherical->bound_bottom = b;
2101 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2104 av_freep(&spherical);
2111 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2113 const AVCodecTag *codec_tags;
2115 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2116 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2118 /* Normalize noncompliant private data that starts with the fourcc
2119 * by expanding/shifting the data by 4 bytes and storing the data
2120 * size at the start. */
2121 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2122 int ret = av_buffer_realloc(&track->codec_priv.buf,
2123 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2127 track->codec_priv.data = track->codec_priv.buf->data;
2128 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2129 track->codec_priv.size += 4;
2130 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2133 *fourcc = AV_RL32(track->codec_priv.data + 4);
2134 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2139 static int matroska_parse_tracks(AVFormatContext *s)
2141 MatroskaDemuxContext *matroska = s->priv_data;
2142 MatroskaTrack *tracks = matroska->tracks.elem;
2147 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2148 MatroskaTrack *track = &tracks[i];
2149 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2150 EbmlList *encodings_list = &track->encodings;
2151 MatroskaTrackEncoding *encodings = encodings_list->elem;
2152 uint8_t *extradata = NULL;
2153 int extradata_size = 0;
2154 int extradata_offset = 0;
2155 uint32_t fourcc = 0;
2157 char* key_id_base64 = NULL;
2160 /* Apply some sanity checks. */
2161 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2162 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2163 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2164 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2165 av_log(matroska->ctx, AV_LOG_INFO,
2166 "Unknown or unsupported track type %"PRIu64"\n",
2170 if (!track->codec_id)
2173 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2174 isnan(track->audio.samplerate)) {
2175 av_log(matroska->ctx, AV_LOG_WARNING,
2176 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2177 track->audio.samplerate);
2178 track->audio.samplerate = 8000;
2181 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2182 if (!track->default_duration && track->video.frame_rate > 0) {
2183 double default_duration = 1000000000 / track->video.frame_rate;
2184 if (default_duration > UINT64_MAX || default_duration < 0) {
2185 av_log(matroska->ctx, AV_LOG_WARNING,
2186 "Invalid frame rate %e. Cannot calculate default duration.\n",
2187 track->video.frame_rate);
2189 track->default_duration = default_duration;
2192 if (track->video.display_width == -1)
2193 track->video.display_width = track->video.pixel_width;
2194 if (track->video.display_height == -1)
2195 track->video.display_height = track->video.pixel_height;
2196 if (track->video.color_space.size == 4)
2197 fourcc = AV_RL32(track->video.color_space.data);
2198 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2199 if (!track->audio.out_samplerate)
2200 track->audio.out_samplerate = track->audio.samplerate;
2202 if (encodings_list->nb_elem > 1) {
2203 av_log(matroska->ctx, AV_LOG_ERROR,
2204 "Multiple combined encodings not supported");
2205 } else if (encodings_list->nb_elem == 1) {
2206 if (encodings[0].type) {
2207 if (encodings[0].encryption.key_id.size > 0) {
2208 /* Save the encryption key id to be stored later as a
2210 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2211 key_id_base64 = av_malloc(b64_size);
2212 if (key_id_base64 == NULL)
2213 return AVERROR(ENOMEM);
2215 av_base64_encode(key_id_base64, b64_size,
2216 encodings[0].encryption.key_id.data,
2217 encodings[0].encryption.key_id.size);
2219 encodings[0].scope = 0;
2220 av_log(matroska->ctx, AV_LOG_ERROR,
2221 "Unsupported encoding type");
2225 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2228 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2231 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2233 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2234 encodings[0].scope = 0;
2235 av_log(matroska->ctx, AV_LOG_ERROR,
2236 "Unsupported encoding type");
2237 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2238 uint8_t *codec_priv = track->codec_priv.data;
2239 int ret = matroska_decode_buffer(&track->codec_priv.data,
2240 &track->codec_priv.size,
2243 track->codec_priv.data = NULL;
2244 track->codec_priv.size = 0;
2245 av_log(matroska->ctx, AV_LOG_ERROR,
2246 "Failed to decode codec private data\n");
2249 if (codec_priv != track->codec_priv.data) {
2250 av_buffer_unref(&track->codec_priv.buf);
2251 if (track->codec_priv.data) {
2252 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2253 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2255 if (!track->codec_priv.buf) {
2256 av_freep(&track->codec_priv.data);
2257 track->codec_priv.size = 0;
2258 return AVERROR(ENOMEM);
2265 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2266 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2267 strlen(ff_mkv_codec_tags[j].str))) {
2268 codec_id = ff_mkv_codec_tags[j].id;
2273 st = track->stream = avformat_new_stream(s, NULL);
2275 av_free(key_id_base64);
2276 return AVERROR(ENOMEM);
2279 if (key_id_base64) {
2280 /* export encryption key id as base64 metadata tag */
2281 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2282 av_freep(&key_id_base64);
2285 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2286 track->codec_priv.size >= 40 &&
2287 track->codec_priv.data) {
2288 track->ms_compat = 1;
2289 bit_depth = AV_RL16(track->codec_priv.data + 14);
2290 fourcc = AV_RL32(track->codec_priv.data + 16);
2291 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2294 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2296 extradata_offset = 40;
2297 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2298 track->codec_priv.size >= 14 &&
2299 track->codec_priv.data) {
2301 ffio_init_context(&b, track->codec_priv.data,
2302 track->codec_priv.size,
2303 0, NULL, NULL, NULL, NULL);
2304 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2307 codec_id = st->codecpar->codec_id;
2308 fourcc = st->codecpar->codec_tag;
2309 extradata_offset = FFMIN(track->codec_priv.size, 18);
2310 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2311 /* Normally 36, but allow noncompliant private data */
2312 && (track->codec_priv.size >= 32)
2313 && (track->codec_priv.data)) {
2314 uint16_t sample_size;
2315 int ret = get_qt_codec(track, &fourcc, &codec_id);
2318 sample_size = AV_RB16(track->codec_priv.data + 26);
2320 if (sample_size == 8) {
2321 fourcc = MKTAG('r','a','w',' ');
2322 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2323 } else if (sample_size == 16) {
2324 fourcc = MKTAG('t','w','o','s');
2325 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2328 if ((fourcc == MKTAG('t','w','o','s') ||
2329 fourcc == MKTAG('s','o','w','t')) &&
2331 codec_id = AV_CODEC_ID_PCM_S8;
2332 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2333 (track->codec_priv.size >= 21) &&
2334 (track->codec_priv.data)) {
2335 int ret = get_qt_codec(track, &fourcc, &codec_id);
2338 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2339 fourcc = MKTAG('S','V','Q','3');
2340 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2342 if (codec_id == AV_CODEC_ID_NONE)
2343 av_log(matroska->ctx, AV_LOG_ERROR,
2344 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2345 if (track->codec_priv.size >= 86) {
2346 bit_depth = AV_RB16(track->codec_priv.data + 82);
2347 ffio_init_context(&b, track->codec_priv.data,
2348 track->codec_priv.size,
2349 0, NULL, NULL, NULL, NULL);
2350 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2352 track->has_palette = 1;
2355 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2356 switch (track->audio.bitdepth) {
2358 codec_id = AV_CODEC_ID_PCM_U8;
2361 codec_id = AV_CODEC_ID_PCM_S24BE;
2364 codec_id = AV_CODEC_ID_PCM_S32BE;
2367 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2368 switch (track->audio.bitdepth) {
2370 codec_id = AV_CODEC_ID_PCM_U8;
2373 codec_id = AV_CODEC_ID_PCM_S24LE;
2376 codec_id = AV_CODEC_ID_PCM_S32LE;
2379 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2380 track->audio.bitdepth == 64) {
2381 codec_id = AV_CODEC_ID_PCM_F64LE;
2382 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2383 int profile = matroska_aac_profile(track->codec_id);
2384 int sri = matroska_aac_sri(track->audio.samplerate);
2385 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2387 return AVERROR(ENOMEM);
2388 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2389 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2390 if (strstr(track->codec_id, "SBR")) {
2391 sri = matroska_aac_sri(track->audio.out_samplerate);
2392 extradata[2] = 0x56;
2393 extradata[3] = 0xE5;
2394 extradata[4] = 0x80 | (sri << 3);
2398 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2399 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2400 * Create the "atom size", "tag", and "tag version" fields the
2401 * decoder expects manually. */
2402 extradata_size = 12 + track->codec_priv.size;
2403 extradata = av_mallocz(extradata_size +
2404 AV_INPUT_BUFFER_PADDING_SIZE);
2406 return AVERROR(ENOMEM);
2407 AV_WB32(extradata, extradata_size);
2408 memcpy(&extradata[4], "alac", 4);
2409 AV_WB32(&extradata[8], 0);
2410 memcpy(&extradata[12], track->codec_priv.data,
2411 track->codec_priv.size);
2412 } else if (codec_id == AV_CODEC_ID_TTA) {
2413 extradata_size = 30;
2414 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2416 return AVERROR(ENOMEM);
2417 ffio_init_context(&b, extradata, extradata_size, 1,
2418 NULL, NULL, NULL, NULL);
2419 avio_write(&b, "TTA1", 4);
2421 if (track->audio.channels > UINT16_MAX ||
2422 track->audio.bitdepth > UINT16_MAX) {
2423 av_log(matroska->ctx, AV_LOG_WARNING,
2424 "Too large audio channel number %"PRIu64
2425 " or bitdepth %"PRIu64". Skipping track.\n",
2426 track->audio.channels, track->audio.bitdepth);
2427 av_freep(&extradata);
2428 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2429 return AVERROR_INVALIDDATA;
2433 avio_wl16(&b, track->audio.channels);
2434 avio_wl16(&b, track->audio.bitdepth);
2435 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2436 return AVERROR_INVALIDDATA;
2437 avio_wl32(&b, track->audio.out_samplerate);
2438 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2439 track->audio.out_samplerate,
2440 AV_TIME_BASE * 1000));
2441 } else if (codec_id == AV_CODEC_ID_RV10 ||
2442 codec_id == AV_CODEC_ID_RV20 ||
2443 codec_id == AV_CODEC_ID_RV30 ||
2444 codec_id == AV_CODEC_ID_RV40) {
2445 extradata_offset = 26;
2446 } else if (codec_id == AV_CODEC_ID_RA_144) {
2447 track->audio.out_samplerate = 8000;
2448 track->audio.channels = 1;
2449 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2450 codec_id == AV_CODEC_ID_COOK ||
2451 codec_id == AV_CODEC_ID_ATRAC3 ||
2452 codec_id == AV_CODEC_ID_SIPR)
2453 && track->codec_priv.data) {
2456 ffio_init_context(&b, track->codec_priv.data,
2457 track->codec_priv.size,
2458 0, NULL, NULL, NULL, NULL);
2460 flavor = avio_rb16(&b);
2461 track->audio.coded_framesize = avio_rb32(&b);
2463 track->audio.sub_packet_h = avio_rb16(&b);
2464 track->audio.frame_size = avio_rb16(&b);
2465 track->audio.sub_packet_size = avio_rb16(&b);
2467 track->audio.coded_framesize <= 0 ||
2468 track->audio.sub_packet_h <= 0 ||
2469 track->audio.frame_size <= 0 ||
2470 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2471 return AVERROR_INVALIDDATA;
2472 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2473 track->audio.frame_size);
2474 if (!track->audio.buf)
2475 return AVERROR(ENOMEM);
2476 if (codec_id == AV_CODEC_ID_RA_288) {
2477 st->codecpar->block_align = track->audio.coded_framesize;
2478 track->codec_priv.size = 0;
2480 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2481 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2482 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2483 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2485 st->codecpar->block_align = track->audio.sub_packet_size;
2486 extradata_offset = 78;
2488 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2489 ret = matroska_parse_flac(s, track, &extradata_offset);
2492 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2493 fourcc = AV_RL32(track->codec_priv.data);
2494 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2495 /* we don't need any value stored in CodecPrivate.
2496 make sure that it's not exported as extradata. */
2497 track->codec_priv.size = 0;
2498 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2499 /* For now, propagate only the OBUs, if any. Once libavcodec is
2500 updated to handle isobmff style extradata this can be removed. */
2501 extradata_offset = 4;
2503 track->codec_priv.size -= extradata_offset;
2505 if (codec_id == AV_CODEC_ID_NONE)
2506 av_log(matroska->ctx, AV_LOG_INFO,
2507 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2509 if (track->time_scale < 0.01)
2510 track->time_scale = 1.0;
2511 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2512 1000 * 1000 * 1000); /* 64 bit pts in ns */
2514 /* convert the delay from ns to the track timebase */
2515 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2516 (AVRational){ 1, 1000000000 },
2519 st->codecpar->codec_id = codec_id;
2521 if (strcmp(track->language, "und"))
2522 av_dict_set(&st->metadata, "language", track->language, 0);
2523 av_dict_set(&st->metadata, "title", track->name, 0);
2525 if (track->flag_default)
2526 st->disposition |= AV_DISPOSITION_DEFAULT;
2527 if (track->flag_forced)
2528 st->disposition |= AV_DISPOSITION_FORCED;
2530 if (!st->codecpar->extradata) {
2532 st->codecpar->extradata = extradata;
2533 st->codecpar->extradata_size = extradata_size;
2534 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2535 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2536 return AVERROR(ENOMEM);
2537 memcpy(st->codecpar->extradata,
2538 track->codec_priv.data + extradata_offset,
2539 track->codec_priv.size);
2543 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2544 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2545 int display_width_mul = 1;
2546 int display_height_mul = 1;
2548 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2549 st->codecpar->codec_tag = fourcc;
2551 st->codecpar->bits_per_coded_sample = bit_depth;
2552 st->codecpar->width = track->video.pixel_width;
2553 st->codecpar->height = track->video.pixel_height;
2555 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2556 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2557 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2558 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2560 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2561 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2563 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2564 av_reduce(&st->sample_aspect_ratio.num,
2565 &st->sample_aspect_ratio.den,
2566 st->codecpar->height * track->video.display_width * display_width_mul,
2567 st->codecpar->width * track->video.display_height * display_height_mul,
2570 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2571 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2573 if (track->default_duration) {
2574 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2575 1000000000, track->default_duration, 30000);
2576 #if FF_API_R_FRAME_RATE
2577 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2578 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2579 st->r_frame_rate = st->avg_frame_rate;
2583 /* export stereo mode flag as metadata tag */
2584 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2585 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2587 /* export alpha mode flag as metadata tag */
2588 if (track->video.alpha_mode)
2589 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2591 /* if we have virtual track, mark the real tracks */
2592 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2594 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2596 snprintf(buf, sizeof(buf), "%s_%d",
2597 ff_matroska_video_stereo_plane[planes[j].type], i);
2598 for (k=0; k < matroska->tracks.nb_elem; k++)
2599 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2600 av_dict_set(&tracks[k].stream->metadata,
2601 "stereo_mode", buf, 0);
2605 // add stream level stereo3d side data if it is a supported format
2606 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2607 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2608 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2613 ret = mkv_parse_video_color(st, track);
2616 ret = mkv_parse_video_projection(st, track);
2619 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2620 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2621 st->codecpar->codec_tag = fourcc;
2622 st->codecpar->sample_rate = track->audio.out_samplerate;
2623 st->codecpar->channels = track->audio.channels;
2624 if (!st->codecpar->bits_per_coded_sample)
2625 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2626 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2627 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2628 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2629 st->need_parsing = AVSTREAM_PARSE_FULL;
2630 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2631 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2632 if (track->codec_delay > 0) {
2633 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2634 (AVRational){1, 1000000000},
2635 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2636 48000 : st->codecpar->sample_rate});
2638 if (track->seek_preroll > 0) {
2639 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2640 (AVRational){1, 1000000000},
2641 (AVRational){1, st->codecpar->sample_rate});
2643 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2644 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2646 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2647 st->disposition |= AV_DISPOSITION_CAPTIONS;
2648 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2649 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2650 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2651 st->disposition |= AV_DISPOSITION_METADATA;
2653 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2654 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2661 static int matroska_read_header(AVFormatContext *s)
2663 MatroskaDemuxContext *matroska = s->priv_data;
2664 EbmlList *attachments_list = &matroska->attachments;
2665 EbmlList *chapters_list = &matroska->chapters;
2666 MatroskaAttachment *attachments;
2667 MatroskaChapter *chapters;
2668 uint64_t max_start = 0;
2674 matroska->cues_parsing_deferred = 1;
2676 /* First read the EBML header. */
2677 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2678 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2679 ebml_free(ebml_syntax, &ebml);
2680 return AVERROR_INVALIDDATA;
2682 if (ebml.version > EBML_VERSION ||
2683 ebml.max_size > sizeof(uint64_t) ||
2684 ebml.id_length > sizeof(uint32_t) ||
2685 ebml.doctype_version > 3) {
2686 avpriv_report_missing_feature(matroska->ctx,
2687 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2688 ebml.version, ebml.doctype, ebml.doctype_version);
2689 ebml_free(ebml_syntax, &ebml);
2690 return AVERROR_PATCHWELCOME;
2691 } else if (ebml.doctype_version == 3) {
2692 av_log(matroska->ctx, AV_LOG_WARNING,
2693 "EBML header using unsupported features\n"
2694 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2695 ebml.version, ebml.doctype, ebml.doctype_version);
2697 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2698 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2700 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2701 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2702 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2703 ebml_free(ebml_syntax, &ebml);
2704 return AVERROR_INVALIDDATA;
2707 ebml_free(ebml_syntax, &ebml);
2709 /* The next thing is a segment. */
2710 pos = avio_tell(matroska->ctx->pb);
2711 res = ebml_parse(matroska, matroska_segments, matroska);
2712 // try resyncing until we find a EBML_STOP type element.
2714 res = matroska_resync(matroska, pos);
2717 pos = avio_tell(matroska->ctx->pb);
2718 res = ebml_parse(matroska, matroska_segment, matroska);
2720 /* Set data_offset as it might be needed later by seek_frame_generic. */
2721 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2722 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2723 matroska_execute_seekhead(matroska);
2725 if (!matroska->time_scale)
2726 matroska->time_scale = 1000000;
2727 if (matroska->duration)
2728 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2729 1000 / AV_TIME_BASE;
2730 av_dict_set(&s->metadata, "title", matroska->title, 0);
2731 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2733 if (matroska->date_utc.size == 8)
2734 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2736 res = matroska_parse_tracks(s);
2740 attachments = attachments_list->elem;
2741 for (j = 0; j < attachments_list->nb_elem; j++) {
2742 if (!(attachments[j].filename && attachments[j].mime &&
2743 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2744 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2746 AVStream *st = avformat_new_stream(s, NULL);
2749 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2750 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2751 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2753 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2754 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2755 strlen(ff_mkv_image_mime_tags[i].str))) {
2756 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2761 attachments[j].stream = st;
2763 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2764 AVPacket *pkt = &st->attached_pic;
2766 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2767 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2769 av_init_packet(pkt);
2770 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2772 return AVERROR(ENOMEM);
2773 pkt->data = attachments[j].bin.data;
2774 pkt->size = attachments[j].bin.size;
2775 pkt->stream_index = st->index;
2776 pkt->flags |= AV_PKT_FLAG_KEY;
2778 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2779 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2781 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2782 attachments[j].bin.size);
2784 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2785 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2786 strlen(ff_mkv_mime_tags[i].str))) {
2787 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2795 chapters = chapters_list->elem;
2796 for (i = 0; i < chapters_list->nb_elem; i++)
2797 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2798 (max_start == 0 || chapters[i].start > max_start)) {
2799 chapters[i].chapter =
2800 avpriv_new_chapter(s, chapters[i].uid,
2801 (AVRational) { 1, 1000000000 },
2802 chapters[i].start, chapters[i].end,
2804 if (chapters[i].chapter) {
2805 av_dict_set(&chapters[i].chapter->metadata,
2806 "title", chapters[i].title, 0);
2808 max_start = chapters[i].start;
2811 matroska_add_index_entries(matroska);
2813 matroska_convert_tags(s);
2817 matroska_read_close(s);
2822 * Put one packet in an application-supplied AVPacket struct.
2823 * Returns 0 on success or -1 on failure.
2825 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2828 if (matroska->queue) {
2829 MatroskaTrack *tracks = matroska->tracks.elem;
2830 MatroskaTrack *track;
2832 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2833 track = &tracks[pkt->stream_index];
2834 if (track->has_palette) {
2835 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2837 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2839 memcpy(pal, track->palette, AVPALETTE_SIZE);
2841 track->has_palette = 0;
2850 * Free all packets in our internal queue.
2852 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2854 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2857 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2858 int *buf_size, int type,
2859 uint32_t **lace_buf, int *laces)
2861 int res = 0, n, size = *buf_size;
2862 uint8_t *data = *buf;
2863 uint32_t *lace_size;
2867 *lace_buf = av_malloc(sizeof(**lace_buf));
2869 return AVERROR(ENOMEM);
2871 *lace_buf[0] = size;
2875 av_assert0(size > 0);
2879 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2881 return AVERROR(ENOMEM);
2884 case 0x1: /* Xiph lacing */
2888 for (n = 0; res == 0 && n < *laces - 1; n++) {
2892 if (size <= total) {
2893 res = AVERROR_INVALIDDATA;
2898 lace_size[n] += temp;
2905 if (size <= total) {
2906 res = AVERROR_INVALIDDATA;
2910 lace_size[n] = size - total;
2914 case 0x2: /* fixed-size lacing */
2915 if (size % (*laces)) {
2916 res = AVERROR_INVALIDDATA;
2919 for (n = 0; n < *laces; n++)
2920 lace_size[n] = size / *laces;
2923 case 0x3: /* EBML lacing */
2927 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2928 if (n < 0 || num > INT_MAX) {
2929 av_log(matroska->ctx, AV_LOG_INFO,
2930 "EBML block data error\n");
2931 res = n<0 ? n : AVERROR_INVALIDDATA;
2936 total = lace_size[0] = num;
2937 for (n = 1; res == 0 && n < *laces - 1; n++) {
2940 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2941 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2942 av_log(matroska->ctx, AV_LOG_INFO,
2943 "EBML block data error\n");
2944 res = r<0 ? r : AVERROR_INVALIDDATA;
2949 lace_size[n] = lace_size[n - 1] + snum;
2950 total += lace_size[n];
2952 if (size <= total) {
2953 res = AVERROR_INVALIDDATA;
2956 lace_size[*laces - 1] = size - total;
2962 *lace_buf = lace_size;
2968 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2969 MatroskaTrack *track, AVStream *st,
2970 uint8_t *data, int size, uint64_t timecode,
2973 int a = st->codecpar->block_align;
2974 int sps = track->audio.sub_packet_size;
2975 int cfs = track->audio.coded_framesize;
2976 int h = track->audio.sub_packet_h;
2977 int y = track->audio.sub_packet_cnt;
2978 int w = track->audio.frame_size;
2981 if (!track->audio.pkt_cnt) {
2982 if (track->audio.sub_packet_cnt == 0)
2983 track->audio.buf_timecode = timecode;
2984 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2985 if (size < cfs * h / 2) {
2986 av_log(matroska->ctx, AV_LOG_ERROR,
2987 "Corrupt int4 RM-style audio packet size\n");
2988 return AVERROR_INVALIDDATA;
2990 for (x = 0; x < h / 2; x++)
2991 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2992 data + x * cfs, cfs);
2993 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2995 av_log(matroska->ctx, AV_LOG_ERROR,
2996 "Corrupt sipr RM-style audio packet size\n");
2997 return AVERROR_INVALIDDATA;
2999 memcpy(track->audio.buf + y * w, data, w);
3001 if (size < sps * w / sps || h<=0 || w%sps) {
3002 av_log(matroska->ctx, AV_LOG_ERROR,
3003 "Corrupt generic RM-style audio packet size\n");
3004 return AVERROR_INVALIDDATA;
3006 for (x = 0; x < w / sps; x++)
3007 memcpy(track->audio.buf +
3008 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3009 data + x * sps, sps);
3012 if (++track->audio.sub_packet_cnt >= h) {
3013 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3014 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3015 track->audio.sub_packet_cnt = 0;
3016 track->audio.pkt_cnt = h * w / a;
3020 while (track->audio.pkt_cnt) {
3022 AVPacket pktl, *pkt = &pktl;
3024 ret = av_new_packet(pkt, a);
3029 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3031 pkt->pts = track->audio.buf_timecode;
3032 track->audio.buf_timecode = AV_NOPTS_VALUE;
3034 pkt->stream_index = st->index;
3035 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3037 av_packet_unref(pkt);
3038 return AVERROR(ENOMEM);
3045 /* reconstruct full wavpack blocks from mangled matroska ones */
3046 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3047 uint8_t **pdst, int *size)
3049 uint8_t *dst = NULL;
3054 int ret, offset = 0;
3056 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3057 return AVERROR_INVALIDDATA;
3059 ver = AV_RL16(track->stream->codecpar->extradata);
3061 samples = AV_RL32(src);
3065 while (srclen >= 8) {
3070 uint32_t flags = AV_RL32(src);
3071 uint32_t crc = AV_RL32(src + 4);
3075 multiblock = (flags & 0x1800) != 0x1800;
3078 ret = AVERROR_INVALIDDATA;
3081 blocksize = AV_RL32(src);
3087 if (blocksize > srclen) {
3088 ret = AVERROR_INVALIDDATA;
3092 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3094 ret = AVERROR(ENOMEM);
3098 dstlen += blocksize + 32;
3100 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3101 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3102 AV_WL16(dst + offset + 8, ver); // version
3103 AV_WL16(dst + offset + 10, 0); // track/index_no
3104 AV_WL32(dst + offset + 12, 0); // total samples
3105 AV_WL32(dst + offset + 16, 0); // block index
3106 AV_WL32(dst + offset + 20, samples); // number of samples
3107 AV_WL32(dst + offset + 24, flags); // flags
3108 AV_WL32(dst + offset + 28, crc); // crc
3109 memcpy(dst + offset + 32, src, blocksize); // block data
3112 srclen -= blocksize;
3113 offset += blocksize + 32;
3116 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3128 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3129 uint8_t **pdst, int *size)
3134 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3135 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3137 return AVERROR(ENOMEM);
3139 AV_WB32(dst, dstlen);
3140 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3141 memcpy(dst + 8, src, dstlen);
3142 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3152 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3153 MatroskaTrack *track,
3155 uint8_t *data, int data_len,
3160 AVPacket pktl, *pkt = &pktl;
3161 uint8_t *id, *settings, *text, *buf;
3162 int id_len, settings_len, text_len;
3167 return AVERROR_INVALIDDATA;
3170 q = data + data_len;
3175 if (*p == '\r' || *p == '\n') {
3184 if (p >= q || *p != '\n')
3185 return AVERROR_INVALIDDATA;
3191 if (*p == '\r' || *p == '\n') {
3192 settings_len = p - settings;
3200 if (p >= q || *p != '\n')
3201 return AVERROR_INVALIDDATA;
3206 while (text_len > 0) {
3207 const int len = text_len - 1;
3208 const uint8_t c = p[len];
3209 if (c != '\r' && c != '\n')
3215 return AVERROR_INVALIDDATA;
3217 err = av_new_packet(pkt, text_len);
3222 memcpy(pkt->data, text, text_len);
3225 buf = av_packet_new_side_data(pkt,
3226 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3229 av_packet_unref(pkt);
3230 return AVERROR(ENOMEM);
3232 memcpy(buf, id, id_len);
3235 if (settings_len > 0) {
3236 buf = av_packet_new_side_data(pkt,
3237 AV_PKT_DATA_WEBVTT_SETTINGS,
3240 av_packet_unref(pkt);
3241 return AVERROR(ENOMEM);
3243 memcpy(buf, settings, settings_len);
3246 // Do we need this for subtitles?
3247 // pkt->flags = AV_PKT_FLAG_KEY;
3249 pkt->stream_index = st->index;
3250 pkt->pts = timecode;
3252 // Do we need this for subtitles?
3253 // pkt->dts = timecode;
3255 pkt->duration = duration;
3258 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3260 av_packet_unref(pkt);
3261 return AVERROR(ENOMEM);
3267 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3268 MatroskaTrack *track, AVStream *st,
3269 AVBufferRef *buf, uint8_t *data, int pkt_size,
3270 uint64_t timecode, uint64_t lace_duration,
3271 int64_t pos, int is_keyframe,
3272 uint8_t *additional, uint64_t additional_id, int additional_size,
3273 int64_t discard_padding)
3275 MatroskaTrackEncoding *encodings = track->encodings.elem;
3276 uint8_t *pkt_data = data;
3278 AVPacket pktl, *pkt = &pktl;
3280 if (encodings && !encodings->type && encodings->scope & 1) {
3281 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3286 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3288 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3290 av_log(matroska->ctx, AV_LOG_ERROR,
3291 "Error parsing a wavpack block.\n");
3294 if (pkt_data != data)
3295 av_freep(&pkt_data);
3299 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3301 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3303 av_log(matroska->ctx, AV_LOG_ERROR,
3304 "Error parsing a prores block.\n");
3307 if (pkt_data != data)
3308 av_freep(&pkt_data);
3312 av_init_packet(pkt);
3313 if (pkt_data != data)
3314 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3317 pkt->buf = av_buffer_ref(buf);
3320 res = AVERROR(ENOMEM);
3324 pkt->data = pkt_data;
3325 pkt->size = pkt_size;
3326 pkt->flags = is_keyframe;
3327 pkt->stream_index = st->index;
3329 if (additional_size > 0) {
3330 uint8_t *side_data = av_packet_new_side_data(pkt,
3331 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3332 additional_size + 8);
3334 av_packet_unref(pkt);
3335 return AVERROR(ENOMEM);
3337 AV_WB64(side_data, additional_id);
3338 memcpy(side_data + 8, additional, additional_size);
3341 if (discard_padding) {
3342 uint8_t *side_data = av_packet_new_side_data(pkt,
3343 AV_PKT_DATA_SKIP_SAMPLES,
3346 av_packet_unref(pkt);
3347 return AVERROR(ENOMEM);
3349 discard_padding = av_rescale_q(discard_padding,
3350 (AVRational){1, 1000000000},
3351 (AVRational){1, st->codecpar->sample_rate});
3352 if (discard_padding > 0) {
3353 AV_WL32(side_data + 4, discard_padding);
3355 AV_WL32(side_data, -discard_padding);
3359 if (track->ms_compat)
3360 pkt->dts = timecode;
3362 pkt->pts = timecode;
3364 pkt->duration = lace_duration;
3366 #if FF_API_CONVERGENCE_DURATION
3367 FF_DISABLE_DEPRECATION_WARNINGS
3368 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3369 pkt->convergence_duration = lace_duration;
3371 FF_ENABLE_DEPRECATION_WARNINGS
3374 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3376 av_packet_unref(pkt);
3377 return AVERROR(ENOMEM);
3383 if (pkt_data != data)
3384 av_freep(&pkt_data);
3388 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3389 int size, int64_t pos, uint64_t cluster_time,
3390 uint64_t block_duration, int is_keyframe,
3391 uint8_t *additional, uint64_t additional_id, int additional_size,
3392 int64_t cluster_pos, int64_t discard_padding)
3394 uint64_t timecode = AV_NOPTS_VALUE;
3395 MatroskaTrack *track;
3399 uint32_t *lace_size = NULL;
3400 int n, flags, laces = 0;
3402 int trust_default_duration = 1;
3404 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3410 track = matroska_find_track_by_num(matroska, num);
3411 if (!track || !track->stream) {
3412 av_log(matroska->ctx, AV_LOG_INFO,
3413 "Invalid stream %"PRIu64"\n", num);
3414 return AVERROR_INVALIDDATA;
3415 } else if (size <= 3)
3418 if (st->discard >= AVDISCARD_ALL)
3420 av_assert1(block_duration != AV_NOPTS_VALUE);
3422 block_time = sign_extend(AV_RB16(data), 16);
3426 if (is_keyframe == -1)
3427 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3429 if (cluster_time != (uint64_t) -1 &&
3430 (block_time >= 0 || cluster_time >= -block_time)) {
3431 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3432 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3433 timecode < track->end_timecode)
3434 is_keyframe = 0; /* overlapping subtitles are not key frame */
3436 ff_reduce_index(matroska->ctx, st->index);
3437 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3442 if (matroska->skip_to_keyframe &&
3443 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3444 // Compare signed timecodes. Timecode may be negative due to codec delay
3445 // offset. We don't support timestamps greater than int64_t anyway - see
3447 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3450 matroska->skip_to_keyframe = 0;
3451 else if (!st->skip_to_keyframe) {
3452 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3453 matroska->skip_to_keyframe = 0;
3457 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3458 &lace_size, &laces);
3463 if (track->audio.samplerate == 8000) {
3464 // If this is needed for more codecs, then add them here
3465 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3466 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3467 trust_default_duration = 0;
3471 if (!block_duration && trust_default_duration)
3472 block_duration = track->default_duration * laces / matroska->time_scale;
3474 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3475 track->end_timecode =
3476 FFMAX(track->end_timecode, timecode + block_duration);
3478 for (n = 0; n < laces; n++) {
3479 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3481 if (lace_size[n] > size) {
3482 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3486 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3487 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3488 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3489 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3490 st->codecpar->block_align && track->audio.sub_packet_size) {
3491 res = matroska_parse_rm_audio(matroska, track, st, data,
3497 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3498 res = matroska_parse_webvtt(matroska, track, st,
3500 timecode, lace_duration,
3505 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3506 timecode, lace_duration, pos,
3507 !n ? is_keyframe : 0,
3508 additional, additional_id, additional_size,
3514 if (timecode != AV_NOPTS_VALUE)
3515 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3516 data += lace_size[n];
3517 size -= lace_size[n];
3525 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3527 MatroskaCluster *cluster = &matroska->current_cluster;
3528 MatroskaBlock *block = &cluster->block;
3530 res = ebml_parse(matroska,
3531 matroska_cluster_parsing,
3536 ebml_level_end(matroska);
3537 cluster->pos = avio_tell(matroska->ctx->pb);
3538 /* sizeof the ID which was already read */
3539 if (matroska->current_id)
3541 res = ebml_parse(matroska,
3544 /* Try parsing the block again. */
3546 res = ebml_parse(matroska,
3547 matroska_cluster_parsing,
3551 if (!res && block->bin.size > 0) {
3552 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3553 uint8_t* additional = block->additional.size > 0 ?
3554 block->additional.data : NULL;
3556 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3557 block->bin.size, block->bin.pos,
3558 matroska->current_cluster.timecode,
3559 block->duration, is_keyframe,
3560 additional, block->additional_id,
3561 block->additional.size,
3563 block->discard_padding);
3566 ebml_free(matroska_blockgroup, block);
3567 memset(block, 0, sizeof(*block));
3572 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3574 MatroskaDemuxContext *matroska = s->priv_data;
3577 while (matroska_deliver_packet(matroska, pkt)) {
3578 int64_t pos = avio_tell(matroska->ctx->pb);
3580 return (ret < 0) ? ret : AVERROR_EOF;
3581 if (matroska_parse_cluster(matroska) < 0)
3582 ret = matroska_resync(matroska, pos);
3588 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3589 int64_t timestamp, int flags)
3591 MatroskaDemuxContext *matroska = s->priv_data;
3592 MatroskaTrack *tracks = NULL;
3593 AVStream *st = s->streams[stream_index];
3596 /* Parse the CUES now since we need the index data to seek. */
3597 if (matroska->cues_parsing_deferred > 0) {
3598 matroska->cues_parsing_deferred = 0;
3599 matroska_parse_cues(matroska);
3602 if (!st->nb_index_entries)
3604 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3606 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3607 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3609 matroska->current_id = 0;
3610 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3611 matroska_clear_queue(matroska);
3612 if (matroska_parse_cluster(matroska) < 0)
3617 matroska_clear_queue(matroska);
3618 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3621 tracks = matroska->tracks.elem;
3622 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3623 tracks[i].audio.pkt_cnt = 0;
3624 tracks[i].audio.sub_packet_cnt = 0;
3625 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3626 tracks[i].end_timecode = 0;
3629 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
3630 matroska->current_id = 0;
3631 if (flags & AVSEEK_FLAG_ANY) {
3632 st->skip_to_keyframe = 0;
3633 matroska->skip_to_timecode = timestamp;
3635 st->skip_to_keyframe = 1;
3636 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3638 matroska->skip_to_keyframe = 1;
3640 matroska->num_levels = 0;
3641 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3644 // slightly hackish but allows proper fallback to
3645 // the generic seeking code.
3646 matroska_clear_queue(matroska);
3647 matroska->current_id = 0;
3648 st->skip_to_keyframe =
3649 matroska->skip_to_keyframe = 0;
3651 matroska->num_levels = 0;
3655 static int matroska_read_close(AVFormatContext *s)
3657 MatroskaDemuxContext *matroska = s->priv_data;
3658 MatroskaTrack *tracks = matroska->tracks.elem;
3661 matroska_clear_queue(matroska);
3663 for (n = 0; n < matroska->tracks.nb_elem; n++)
3664 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3665 av_freep(&tracks[n].audio.buf);
3666 ebml_free(matroska_segment, matroska);
3672 int64_t start_time_ns;
3673 int64_t end_time_ns;
3674 int64_t start_offset;
3678 /* This function searches all the Cues and returns the CueDesc corresponding to
3679 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3680 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3682 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3683 MatroskaDemuxContext *matroska = s->priv_data;
3686 int nb_index_entries = s->streams[0]->nb_index_entries;
3687 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3688 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3689 for (i = 1; i < nb_index_entries; i++) {
3690 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3691 index_entries[i].timestamp * matroska->time_scale > ts) {
3696 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3697 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3698 if (i != nb_index_entries - 1) {
3699 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3700 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3702 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3703 // FIXME: this needs special handling for files where Cues appear
3704 // before Clusters. the current logic assumes Cues appear after
3706 cue_desc.end_offset = cues_start - matroska->segment_start;
3711 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3713 MatroskaDemuxContext *matroska = s->priv_data;
3714 int64_t cluster_pos, before_pos;
3716 if (s->streams[0]->nb_index_entries <= 0) return 0;
3717 // seek to the first cluster using cues.
3718 index = av_index_search_timestamp(s->streams[0], 0, 0);
3719 if (index < 0) return 0;
3720 cluster_pos = s->streams[0]->index_entries[index].pos;
3721 before_pos = avio_tell(s->pb);
3723 uint64_t cluster_id, cluster_length;
3726 avio_seek(s->pb, cluster_pos, SEEK_SET);
3727 // read cluster id and length
3728 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3729 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3731 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3734 avio_seek(s->pb, cluster_pos, SEEK_SET);
3735 matroska->current_id = 0;
3736 matroska_clear_queue(matroska);
3737 if (matroska_parse_cluster(matroska) < 0 ||
3741 pkt = &matroska->queue->pkt;
3742 // 4 + read is the length of the cluster id and the cluster length field.
3743 cluster_pos += 4 + read + cluster_length;
3744 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3749 avio_seek(s->pb, before_pos, SEEK_SET);
3753 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3754 double min_buffer, double* buffer,
3755 double* sec_to_download, AVFormatContext *s,
3758 double nano_seconds_per_second = 1000000000.0;
3759 double time_sec = time_ns / nano_seconds_per_second;
3761 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3762 int64_t end_time_ns = time_ns + time_to_search_ns;
3763 double sec_downloaded = 0.0;
3764 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3765 if (desc_curr.start_time_ns == -1)
3767 *sec_to_download = 0.0;
3769 // Check for non cue start time.
3770 if (time_ns > desc_curr.start_time_ns) {
3771 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3772 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3773 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3774 double timeToDownload = (cueBytes * 8.0) / bps;
3776 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3777 *sec_to_download += timeToDownload;
3779 // Check if the search ends within the first cue.
3780 if (desc_curr.end_time_ns >= end_time_ns) {
3781 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3782 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3783 sec_downloaded = percent_to_sub * sec_downloaded;
3784 *sec_to_download = percent_to_sub * *sec_to_download;
3787 if ((sec_downloaded + *buffer) <= min_buffer) {
3791 // Get the next Cue.
3792 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3795 while (desc_curr.start_time_ns != -1) {
3796 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3797 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3798 double desc_sec = desc_ns / nano_seconds_per_second;
3799 double bits = (desc_bytes * 8.0);
3800 double time_to_download = bits / bps;
3802 sec_downloaded += desc_sec - time_to_download;
3803 *sec_to_download += time_to_download;
3805 if (desc_curr.end_time_ns >= end_time_ns) {
3806 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3807 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3808 sec_downloaded = percent_to_sub * sec_downloaded;
3809 *sec_to_download = percent_to_sub * *sec_to_download;
3811 if ((sec_downloaded + *buffer) <= min_buffer)
3816 if ((sec_downloaded + *buffer) <= min_buffer) {
3821 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3823 *buffer = *buffer + sec_downloaded;
3827 /* This function computes the bandwidth of the WebM file with the help of
3828 * buffer_size_after_time_downloaded() function. Both of these functions are
3829 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3830 * Matroska parsing mechanism.
3832 * Returns the bandwidth of the file on success; -1 on error.
3834 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3836 MatroskaDemuxContext *matroska = s->priv_data;
3837 AVStream *st = s->streams[0];
3838 double bandwidth = 0.0;
3841 for (i = 0; i < st->nb_index_entries; i++) {
3842 int64_t prebuffer_ns = 1000000000;
3843 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3844 double nano_seconds_per_second = 1000000000.0;
3845 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3846 double prebuffer_bytes = 0.0;
3847 int64_t temp_prebuffer_ns = prebuffer_ns;
3848 int64_t pre_bytes, pre_ns;
3849 double pre_sec, prebuffer, bits_per_second;
3850 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3852 // Start with the first Cue.
3853 CueDesc desc_end = desc_beg;
3855 // Figure out how much data we have downloaded for the prebuffer. This will
3856 // be used later to adjust the bits per sample to try.
3857 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3858 // Prebuffered the entire Cue.
3859 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3860 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3861 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3863 if (desc_end.start_time_ns == -1) {
3864 // The prebuffer is larger than the duration.
3865 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3867 bits_per_second = 0.0;
3869 // The prebuffer ends in the last Cue. Estimate how much data was
3871 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3872 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3873 pre_sec = pre_ns / nano_seconds_per_second;
3875 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3877 prebuffer = prebuffer_ns / nano_seconds_per_second;
3879 // Set this to 0.0 in case our prebuffer buffers the entire video.
3880 bits_per_second = 0.0;
3882 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3883 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3884 double desc_sec = desc_ns / nano_seconds_per_second;
3885 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3887 // Drop the bps by the percentage of bytes buffered.
3888 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3889 double mod_bits_per_second = calc_bits_per_second * percent;
3891 if (prebuffer < desc_sec) {
3893 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3895 // Add 1 so the bits per second should be a little bit greater than file
3897 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3898 const double min_buffer = 0.0;
3899 double buffer = prebuffer;
3900 double sec_to_download = 0.0;
3902 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3903 min_buffer, &buffer, &sec_to_download,
3907 } else if (rv == 0) {
3908 bits_per_second = (double)(bps);
3913 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3914 } while (desc_end.start_time_ns != -1);
3916 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3918 return (int64_t)bandwidth;
3921 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3923 MatroskaDemuxContext *matroska = s->priv_data;
3924 EbmlList *seekhead_list = &matroska->seekhead;
3925 MatroskaSeekhead *seekhead = seekhead_list->elem;
3927 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3931 // determine cues start and end positions
3932 for (i = 0; i < seekhead_list->nb_elem; i++)
3933 if (seekhead[i].id == MATROSKA_ID_CUES)
3936 if (i >= seekhead_list->nb_elem) return -1;
3938 before_pos = avio_tell(matroska->ctx->pb);
3939 cues_start = seekhead[i].pos + matroska->segment_start;
3940 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3941 // cues_end is computed as cues_start + cues_length + length of the
3942 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3943 // cues_end is inclusive and the above sum is reduced by 1.
3944 uint64_t cues_length, cues_id;
3946 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3947 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3948 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3949 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3952 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3954 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3955 if (cues_start == -1 || cues_end == -1) return -1;
3958 matroska_parse_cues(matroska);
3961 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3964 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3966 // if the file has cues at the start, fix up the init range so tht
3967 // it does not include it
3968 if (cues_start <= init_range)
3969 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3972 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3973 if (bandwidth < 0) return -1;
3974 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3976 // check if all clusters start with key frames
3977 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3979 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3980 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3981 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3982 if (!buf) return -1;
3984 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3985 int ret = snprintf(buf + end, 20,
3986 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3987 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3988 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3989 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3991 return AVERROR_INVALIDDATA;
3995 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4001 static int webm_dash_manifest_read_header(AVFormatContext *s)
4004 int ret = matroska_read_header(s);
4006 MatroskaTrack *tracks;
4007 MatroskaDemuxContext *matroska = s->priv_data;
4009 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4012 if (!s->nb_streams) {
4013 matroska_read_close(s);
4014 av_log(s, AV_LOG_ERROR, "No streams found\n");
4015 return AVERROR_INVALIDDATA;
4018 if (!matroska->is_live) {
4019 buf = av_asprintf("%g", matroska->duration);
4020 if (!buf) return AVERROR(ENOMEM);
4021 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4024 // initialization range
4025 // 5 is the offset of Cluster ID.
4026 init_range = avio_tell(s->pb) - 5;
4027 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4030 // basename of the file
4031 buf = strrchr(s->url, '/');
4032 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4035 tracks = matroska->tracks.elem;
4036 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4038 // parse the cues and populate Cue related fields
4039 if (!matroska->is_live) {
4040 ret = webm_dash_manifest_cues(s, init_range);
4042 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4047 // use the bandwidth from the command line if it was provided
4048 if (matroska->bandwidth > 0) {
4049 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4050 matroska->bandwidth, 0);
4055 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4060 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4061 static const AVOption options[] = {
4062 { "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 },
4063 { "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 },
4067 static const AVClass webm_dash_class = {
4068 .class_name = "WebM DASH Manifest demuxer",
4069 .item_name = av_default_item_name,
4071 .version = LIBAVUTIL_VERSION_INT,
4074 AVInputFormat ff_matroska_demuxer = {
4075 .name = "matroska,webm",
4076 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4077 .extensions = "mkv,mk3d,mka,mks",
4078 .priv_data_size = sizeof(MatroskaDemuxContext),
4079 .read_probe = matroska_probe,
4080 .read_header = matroska_read_header,
4081 .read_packet = matroska_read_packet,
4082 .read_close = matroska_read_close,
4083 .read_seek = matroska_read_seek,
4084 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4087 AVInputFormat ff_webm_dash_manifest_demuxer = {
4088 .name = "webm_dash_manifest",
4089 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4090 .priv_data_size = sizeof(MatroskaDemuxContext),
4091 .read_header = webm_dash_manifest_read_header,
4092 .read_packet = webm_dash_manifest_read_packet,
4093 .read_close = matroska_read_close,
4094 .priv_class = &webm_dash_class,