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);
742 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
744 AVIOContext *pb = matroska->ctx->pb;
747 matroska->current_id = 0;
748 matroska->num_levels = 0;
750 /* seek to next position to resync from */
751 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
758 // try to find a toplevel element
759 while (!avio_feof(pb)) {
760 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
761 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
762 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
763 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
764 matroska->current_id = id;
767 id = (id << 8) | avio_r8(pb);
775 * Return: Whether we reached the end of a level in the hierarchy or not.
777 static int ebml_level_end(MatroskaDemuxContext *matroska)
779 AVIOContext *pb = matroska->ctx->pb;
780 int64_t pos = avio_tell(pb);
782 if (matroska->num_levels > 0) {
783 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
784 if (pos - level->start >= level->length || matroska->current_id) {
785 matroska->num_levels--;
789 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
793 * Read: an "EBML number", which is defined as a variable-length
794 * array of bytes. The first byte indicates the length by giving a
795 * number of 0-bits followed by a one. The position of the first
796 * "one" bit inside the first byte indicates the length of this
798 * Returns: number of bytes read, < 0 on error
800 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
801 int max_size, uint64_t *number, int eof_forbidden)
807 /* The first byte tells us the length in bytes - except when it is zero. */
812 /* get the length of the EBML number */
813 read = 8 - ff_log2_tab[total];
815 if (!total || read > max_size) {
816 pos = avio_tell(pb) - 1;
818 av_log(matroska->ctx, AV_LOG_ERROR,
819 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
820 "of an EBML number\n", pos, pos);
822 av_log(matroska->ctx, AV_LOG_ERROR,
823 "Length %d indicated by an EBML number's first byte 0x%02x "
824 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
825 read, (uint8_t) total, pos, pos, max_size);
827 return AVERROR_INVALIDDATA;
830 /* read out length */
831 total ^= 1 << ff_log2_tab[total];
833 total = (total << 8) | avio_r8(pb);
835 if (pb->eof_reached) {
847 av_log(matroska->ctx, AV_LOG_ERROR,
848 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
853 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
854 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
861 * Read a EBML length value.
862 * This needs special handling for the "unknown length" case which has multiple
865 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
868 int res = ebml_read_num(matroska, pb, 8, number, 1);
869 if (res > 0 && *number + 1 == 1ULL << (7 * res))
870 *number = EBML_UNKNOWN_LENGTH;
875 * Read the next element as an unsigned int.
876 * Returns NEEDS_CHECKING.
878 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
882 /* big-endian ordering; build up number */
885 *num = (*num << 8) | avio_r8(pb);
887 return NEEDS_CHECKING;
891 * Read the next element as a signed int.
892 * Returns NEEDS_CHECKING.
894 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
901 *num = sign_extend(avio_r8(pb), 8);
903 /* big-endian ordering; build up number */
905 *num = ((uint64_t)*num << 8) | avio_r8(pb);
908 return NEEDS_CHECKING;
912 * Read the next element as a float.
913 * Returns NEEDS_CHECKING or < 0 on obvious failure.
915 static int ebml_read_float(AVIOContext *pb, int size, double *num)
920 *num = av_int2float(avio_rb32(pb));
922 *num = av_int2double(avio_rb64(pb));
924 return AVERROR_INVALIDDATA;
926 return NEEDS_CHECKING;
930 * Read the next element as an ASCII string.
931 * 0 is success, < 0 or NEEDS_CHECKING is failure.
933 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
938 /* EBML strings are usually not 0-terminated, so we allocate one
939 * byte more, read the string and NULL-terminate it ourselves. */
940 if (!(res = av_malloc(size + 1)))
941 return AVERROR(ENOMEM);
942 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
944 return ret < 0 ? ret : NEEDS_CHECKING;
954 * Read the next element as binary data.
955 * 0 is success, < 0 or NEEDS_CHECKING is failure.
957 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
961 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
964 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
966 bin->data = bin->buf->data;
968 bin->pos = avio_tell(pb);
969 if ((ret = avio_read(pb, bin->data, length)) != length) {
970 av_buffer_unref(&bin->buf);
973 return ret < 0 ? ret : NEEDS_CHECKING;
980 * Read the next element, but only the header. The contents
981 * are supposed to be sub-elements which can be read separately.
982 * 0 is success, < 0 is failure.
984 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
986 AVIOContext *pb = matroska->ctx->pb;
987 MatroskaLevel *level;
989 if (matroska->num_levels >= EBML_MAX_DEPTH) {
990 av_log(matroska->ctx, AV_LOG_ERROR,
991 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
992 return AVERROR(ENOSYS);
995 level = &matroska->levels[matroska->num_levels++];
996 level->start = avio_tell(pb);
997 level->length = length;
1003 * Read signed/unsigned "EBML" numbers.
1004 * Return: number of bytes processed, < 0 on error
1006 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1007 uint8_t *data, uint32_t size, uint64_t *num)
1010 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1011 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1015 * Same as above, but signed.
1017 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1018 uint8_t *data, uint32_t size, int64_t *num)
1023 /* read as unsigned number first */
1024 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1027 /* make signed (weird way) */
1028 *num = unum - ((1LL << (7 * res - 1)) - 1);
1033 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1034 EbmlSyntax *syntax, void *data);
1036 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1037 uint32_t id, void *data)
1040 for (i = 0; syntax[i].id; i++)
1041 if (id == syntax[i].id)
1043 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1044 matroska->num_levels > 0 &&
1045 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1046 return 0; // we reached the end of an unknown size cluster
1047 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1048 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1050 return ebml_parse_elem(matroska, &syntax[i], data);
1053 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1056 if (!matroska->current_id) {
1058 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id, 0);
1060 // in live mode, finish parsing if EOF is reached.
1061 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1062 res == AVERROR_EOF) ? 1 : res;
1064 matroska->current_id = id | 1 << 7 * res;
1066 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1069 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1074 for (i = 0; syntax[i].id; i++)
1075 switch (syntax[i].type) {
1077 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1080 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1083 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1087 // the default may be NULL
1088 if (syntax[i].def.s) {
1089 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1090 *dst = av_strdup(syntax[i].def.s);
1092 return AVERROR(ENOMEM);
1097 while (!res && !ebml_level_end(matroska))
1098 res = ebml_parse(matroska, syntax, data);
1103 static int is_ebml_id_valid(uint32_t id)
1105 // Due to endian nonsense in Matroska, the highest byte with any bits set
1106 // will contain the leading length bit. This bit in turn identifies the
1107 // total byte length of the element by its position within the byte.
1108 unsigned int bits = av_log2(id);
1109 return id && (bits + 7) / 8 == (8 - bits % 8);
1113 * Allocate and return the entry for the level1 element with the given ID. If
1114 * an entry already exists, return the existing entry.
1116 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1120 MatroskaLevel1Element *elem;
1122 if (!is_ebml_id_valid(id))
1125 // Some files link to all clusters; useless.
1126 if (id == MATROSKA_ID_CLUSTER)
1129 // There can be multiple seekheads.
1130 if (id != MATROSKA_ID_SEEKHEAD) {
1131 for (i = 0; i < matroska->num_level1_elems; i++) {
1132 if (matroska->level1_elems[i].id == id)
1133 return &matroska->level1_elems[i];
1137 // Only a completely broken file would have more elements.
1138 // It also provides a low-effort way to escape from circular seekheads
1139 // (every iteration will add a level1 entry).
1140 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1141 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1145 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1146 *elem = (MatroskaLevel1Element){.id = id};
1151 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1152 EbmlSyntax *syntax, void *data)
1154 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1158 // max. 16 MB for strings
1159 [EBML_STR] = 0x1000000,
1160 [EBML_UTF8] = 0x1000000,
1161 // max. 256 MB for binary data
1162 [EBML_BIN] = 0x10000000,
1163 // no limits for anything else
1165 AVIOContext *pb = matroska->ctx->pb;
1166 uint32_t id = syntax->id;
1170 MatroskaLevel1Element *level1_elem;
1172 data = (char *) data + syntax->data_offset;
1173 if (syntax->list_elem_size) {
1174 EbmlList *list = data;
1175 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1177 return AVERROR(ENOMEM);
1178 list->elem = newelem;
1179 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1180 memset(data, 0, syntax->list_elem_size);
1184 if (syntax->type != EBML_STOP) {
1185 matroska->current_id = 0;
1186 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1188 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1189 av_log(matroska->ctx, AV_LOG_ERROR,
1190 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1191 length, max_lengths[syntax->type], syntax->type);
1192 return AVERROR_INVALIDDATA;
1194 if (matroska->num_levels > 0) {
1195 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1196 AVIOContext *pb = matroska->ctx->pb;
1197 int64_t pos = avio_tell(pb);
1199 if (length != EBML_UNKNOWN_LENGTH &&
1200 level->length != EBML_UNKNOWN_LENGTH) {
1201 uint64_t elem_end = pos + length,
1202 level_end = level->start + level->length;
1204 if (level_end < elem_end) {
1205 av_log(matroska->ctx, AV_LOG_ERROR,
1206 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1207 "containing master element ending at 0x%"PRIx64"\n",
1208 pos, elem_end, level_end);
1209 return AVERROR_INVALIDDATA;
1211 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1212 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1213 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1214 return AVERROR_INVALIDDATA;
1215 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1216 // According to the specifications only clusters and segments
1217 // are allowed to be unknown-sized.
1218 av_log(matroska->ctx, AV_LOG_ERROR,
1219 "Found unknown-sized element other than a cluster at "
1220 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1221 return AVERROR_INVALIDDATA;
1226 switch (syntax->type) {
1228 res = ebml_read_uint(pb, length, data);
1231 res = ebml_read_sint(pb, length, data);
1234 res = ebml_read_float(pb, length, data);
1238 res = ebml_read_ascii(pb, length, data);
1241 res = ebml_read_binary(pb, length, data);
1245 if ((res = ebml_read_master(matroska, length)) < 0)
1247 if (id == MATROSKA_ID_SEGMENT)
1248 matroska->segment_start = avio_tell(matroska->ctx->pb);
1249 if (id == MATROSKA_ID_CUES)
1250 matroska->cues_parsing_deferred = 0;
1251 if (syntax->type == EBML_LEVEL1 &&
1252 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1253 if (level1_elem->parsed)
1254 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1255 level1_elem->parsed = 1;
1257 return ebml_parse_nest(matroska, syntax->def.n, data);
1261 if (ffio_limit(pb, length) != length) {
1262 // ffio_limit emits its own error message,
1263 // so we don't have to.
1264 return AVERROR(EIO);
1266 res = avio_skip(pb, length);
1267 res = res < 0 ? res : 0;
1270 if (res == NEEDS_CHECKING) {
1271 if (pb->eof_reached) {
1280 if (res == AVERROR_INVALIDDATA)
1281 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1282 else if (res == AVERROR(EIO))
1283 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1284 else if (res == AVERROR_EOF) {
1285 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1292 static void ebml_free(EbmlSyntax *syntax, void *data)
1295 for (i = 0; syntax[i].id; i++) {
1296 void *data_off = (char *) data + syntax[i].data_offset;
1297 switch (syntax[i].type) {
1303 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1307 if (syntax[i].list_elem_size) {
1308 EbmlList *list = data_off;
1309 char *ptr = list->elem;
1310 for (j = 0; j < list->nb_elem;
1311 j++, ptr += syntax[i].list_elem_size)
1312 ebml_free(syntax[i].def.n, ptr);
1313 av_freep(&list->elem);
1316 ebml_free(syntax[i].def.n, data_off);
1326 static int matroska_probe(const AVProbeData *p)
1329 int len_mask = 0x80, size = 1, n = 1, i;
1332 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1335 /* length of header */
1337 while (size <= 8 && !(total & len_mask)) {
1343 total &= (len_mask - 1);
1345 total = (total << 8) | p->buf[4 + n++];
1347 /* Does the probe data contain the whole header? */
1348 if (p->buf_size < 4 + size + total)
1351 /* The header should contain a known document type. For now,
1352 * we don't parse the whole header but simply check for the
1353 * availability of that array of characters inside the header.
1354 * Not fully fool-proof, but good enough. */
1355 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1356 size_t probelen = strlen(matroska_doctypes[i]);
1357 if (total < probelen)
1359 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1360 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1361 return AVPROBE_SCORE_MAX;
1364 // probably valid EBML header but no recognized doctype
1365 return AVPROBE_SCORE_EXTENSION;
1368 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1371 MatroskaTrack *tracks = matroska->tracks.elem;
1374 for (i = 0; i < matroska->tracks.nb_elem; i++)
1375 if (tracks[i].num == num)
1378 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1382 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1383 MatroskaTrack *track)
1385 MatroskaTrackEncoding *encodings = track->encodings.elem;
1386 uint8_t *data = *buf;
1387 int isize = *buf_size;
1388 uint8_t *pkt_data = NULL;
1389 uint8_t av_unused *newpktdata;
1390 int pkt_size = isize;
1394 if (pkt_size >= 10000000U)
1395 return AVERROR_INVALIDDATA;
1397 switch (encodings[0].compression.algo) {
1398 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1400 int header_size = encodings[0].compression.settings.size;
1401 uint8_t *header = encodings[0].compression.settings.data;
1403 if (header_size && !header) {
1404 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1411 pkt_size = isize + header_size;
1412 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1414 return AVERROR(ENOMEM);
1416 memcpy(pkt_data, header, header_size);
1417 memcpy(pkt_data + header_size, data, isize);
1421 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1423 olen = pkt_size *= 3;
1424 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1425 + AV_INPUT_BUFFER_PADDING_SIZE);
1427 result = AVERROR(ENOMEM);
1430 pkt_data = newpktdata;
1431 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1432 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1434 result = AVERROR_INVALIDDATA;
1441 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1443 z_stream zstream = { 0 };
1444 if (inflateInit(&zstream) != Z_OK)
1446 zstream.next_in = data;
1447 zstream.avail_in = isize;
1450 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1452 inflateEnd(&zstream);
1453 result = AVERROR(ENOMEM);
1456 pkt_data = newpktdata;
1457 zstream.avail_out = pkt_size - zstream.total_out;
1458 zstream.next_out = pkt_data + zstream.total_out;
1459 result = inflate(&zstream, Z_NO_FLUSH);
1460 } while (result == Z_OK && pkt_size < 10000000);
1461 pkt_size = zstream.total_out;
1462 inflateEnd(&zstream);
1463 if (result != Z_STREAM_END) {
1464 if (result == Z_MEM_ERROR)
1465 result = AVERROR(ENOMEM);
1467 result = AVERROR_INVALIDDATA;
1474 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1476 bz_stream bzstream = { 0 };
1477 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1479 bzstream.next_in = data;
1480 bzstream.avail_in = isize;
1483 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1485 BZ2_bzDecompressEnd(&bzstream);
1486 result = AVERROR(ENOMEM);
1489 pkt_data = newpktdata;
1490 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1491 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1492 result = BZ2_bzDecompress(&bzstream);
1493 } while (result == BZ_OK && pkt_size < 10000000);
1494 pkt_size = bzstream.total_out_lo32;
1495 BZ2_bzDecompressEnd(&bzstream);
1496 if (result != BZ_STREAM_END) {
1497 if (result == BZ_MEM_ERROR)
1498 result = AVERROR(ENOMEM);
1500 result = AVERROR_INVALIDDATA;
1507 return AVERROR_INVALIDDATA;
1510 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1513 *buf_size = pkt_size;
1521 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1522 AVDictionary **metadata, char *prefix)
1524 MatroskaTag *tags = list->elem;
1528 for (i = 0; i < list->nb_elem; i++) {
1529 const char *lang = tags[i].lang &&
1530 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1532 if (!tags[i].name) {
1533 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1537 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1539 av_strlcpy(key, tags[i].name, sizeof(key));
1540 if (tags[i].def || !lang) {
1541 av_dict_set(metadata, key, tags[i].string, 0);
1542 if (tags[i].sub.nb_elem)
1543 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1546 av_strlcat(key, "-", sizeof(key));
1547 av_strlcat(key, lang, sizeof(key));
1548 av_dict_set(metadata, key, tags[i].string, 0);
1549 if (tags[i].sub.nb_elem)
1550 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1553 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1556 static void matroska_convert_tags(AVFormatContext *s)
1558 MatroskaDemuxContext *matroska = s->priv_data;
1559 MatroskaTags *tags = matroska->tags.elem;
1562 for (i = 0; i < matroska->tags.nb_elem; i++) {
1563 if (tags[i].target.attachuid) {
1564 MatroskaAttachment *attachment = matroska->attachments.elem;
1566 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1567 if (attachment[j].uid == tags[i].target.attachuid &&
1568 attachment[j].stream) {
1569 matroska_convert_tag(s, &tags[i].tag,
1570 &attachment[j].stream->metadata, NULL);
1575 av_log(NULL, AV_LOG_WARNING,
1576 "The tags at index %d refer to a "
1577 "non-existent attachment %"PRId64".\n",
1578 i, tags[i].target.attachuid);
1580 } else if (tags[i].target.chapteruid) {
1581 MatroskaChapter *chapter = matroska->chapters.elem;
1583 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1584 if (chapter[j].uid == tags[i].target.chapteruid &&
1585 chapter[j].chapter) {
1586 matroska_convert_tag(s, &tags[i].tag,
1587 &chapter[j].chapter->metadata, NULL);
1592 av_log(NULL, AV_LOG_WARNING,
1593 "The tags at index %d refer to a non-existent chapter "
1595 i, tags[i].target.chapteruid);
1597 } else if (tags[i].target.trackuid) {
1598 MatroskaTrack *track = matroska->tracks.elem;
1600 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1601 if (track[j].uid == tags[i].target.trackuid &&
1603 matroska_convert_tag(s, &tags[i].tag,
1604 &track[j].stream->metadata, NULL);
1609 av_log(NULL, AV_LOG_WARNING,
1610 "The tags at index %d refer to a non-existent track "
1612 i, tags[i].target.trackuid);
1615 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1616 tags[i].target.type);
1621 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1624 uint32_t saved_id = matroska->current_id;
1625 int64_t before_pos = avio_tell(matroska->ctx->pb);
1626 MatroskaLevel level;
1631 offset = pos + matroska->segment_start;
1632 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1633 /* We don't want to lose our seekhead level, so we add
1634 * a dummy. This is a crude hack. */
1635 if (matroska->num_levels == EBML_MAX_DEPTH) {
1636 av_log(matroska->ctx, AV_LOG_INFO,
1637 "Max EBML element depth (%d) reached, "
1638 "cannot parse further.\n", EBML_MAX_DEPTH);
1639 ret = AVERROR_INVALIDDATA;
1642 level.length = EBML_UNKNOWN_LENGTH;
1643 matroska->levels[matroska->num_levels] = level;
1644 matroska->num_levels++;
1645 matroska->current_id = 0;
1647 ret = ebml_parse(matroska, matroska_segment, matroska);
1649 /* remove dummy level */
1650 while (matroska->num_levels) {
1651 uint64_t length = matroska->levels[--matroska->num_levels].length;
1652 if (length == EBML_UNKNOWN_LENGTH)
1658 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1659 matroska->current_id = saved_id;
1664 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1666 EbmlList *seekhead_list = &matroska->seekhead;
1669 // we should not do any seeking in the streaming case
1670 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1673 for (i = 0; i < seekhead_list->nb_elem; i++) {
1674 MatroskaSeekhead *seekheads = seekhead_list->elem;
1675 uint32_t id = seekheads[i].id;
1676 uint64_t pos = seekheads[i].pos;
1678 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1679 if (!elem || elem->parsed)
1684 // defer cues parsing until we actually need cue data.
1685 if (id == MATROSKA_ID_CUES)
1688 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1689 // mark index as broken
1690 matroska->cues_parsing_deferred = -1;
1698 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1700 EbmlList *index_list;
1701 MatroskaIndex *index;
1702 uint64_t index_scale = 1;
1705 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1708 index_list = &matroska->index;
1709 index = index_list->elem;
1710 if (index_list->nb_elem < 2)
1712 if (index[1].time > 1E14 / matroska->time_scale) {
1713 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1716 for (i = 0; i < index_list->nb_elem; i++) {
1717 EbmlList *pos_list = &index[i].pos;
1718 MatroskaIndexPos *pos = pos_list->elem;
1719 for (j = 0; j < pos_list->nb_elem; j++) {
1720 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1722 if (track && track->stream)
1723 av_add_index_entry(track->stream,
1724 pos[j].pos + matroska->segment_start,
1725 index[i].time / index_scale, 0, 0,
1731 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1734 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1737 for (i = 0; i < matroska->num_level1_elems; i++) {
1738 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1739 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1740 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1741 matroska->cues_parsing_deferred = -1;
1747 matroska_add_index_entries(matroska);
1750 static int matroska_aac_profile(char *codec_id)
1752 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1755 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1756 if (strstr(codec_id, aac_profiles[profile]))
1761 static int matroska_aac_sri(int samplerate)
1765 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1766 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1771 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1773 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1774 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1777 static int matroska_parse_flac(AVFormatContext *s,
1778 MatroskaTrack *track,
1781 AVStream *st = track->stream;
1782 uint8_t *p = track->codec_priv.data;
1783 int size = track->codec_priv.size;
1785 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1786 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1787 track->codec_priv.size = 0;
1791 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1793 p += track->codec_priv.size;
1794 size -= track->codec_priv.size;
1796 /* parse the remaining metadata blocks if present */
1798 int block_last, block_type, block_size;
1800 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1804 if (block_size > size)
1807 /* check for the channel mask */
1808 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1809 AVDictionary *dict = NULL;
1810 AVDictionaryEntry *chmask;
1812 ff_vorbis_comment(s, &dict, p, block_size, 0);
1813 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1815 uint64_t mask = strtol(chmask->value, NULL, 0);
1816 if (!mask || mask & ~0x3ffffULL) {
1817 av_log(s, AV_LOG_WARNING,
1818 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1820 st->codecpar->channel_layout = mask;
1822 av_dict_free(&dict);
1832 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1834 int major, minor, micro, bttb = 0;
1836 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1837 * this function, and fixed in 57.52 */
1838 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1839 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1841 switch (field_order) {
1842 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1843 return AV_FIELD_PROGRESSIVE;
1844 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1845 return AV_FIELD_UNKNOWN;
1846 case MATROSKA_VIDEO_FIELDORDER_TT:
1848 case MATROSKA_VIDEO_FIELDORDER_BB:
1850 case MATROSKA_VIDEO_FIELDORDER_BT:
1851 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1852 case MATROSKA_VIDEO_FIELDORDER_TB:
1853 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1855 return AV_FIELD_UNKNOWN;
1859 static void mkv_stereo_mode_display_mul(int stereo_mode,
1860 int *h_width, int *h_height)
1862 switch (stereo_mode) {
1863 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1864 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1865 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1866 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1867 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1869 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1870 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1871 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1872 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1875 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1876 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1877 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1878 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1884 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1885 const MatroskaTrackVideoColor *color = track->video.color.elem;
1886 const MatroskaMasteringMeta *mastering_meta;
1887 int has_mastering_primaries, has_mastering_luminance;
1889 if (!track->video.color.nb_elem)
1892 mastering_meta = &color->mastering_meta;
1893 // Mastering primaries are CIE 1931 coords, and must be > 0.
1894 has_mastering_primaries =
1895 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1896 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1897 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1898 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1899 has_mastering_luminance = mastering_meta->max_luminance > 0;
1901 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1902 st->codecpar->color_space = color->matrix_coefficients;
1903 if (color->primaries != AVCOL_PRI_RESERVED &&
1904 color->primaries != AVCOL_PRI_RESERVED0)
1905 st->codecpar->color_primaries = color->primaries;
1906 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1907 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1908 st->codecpar->color_trc = color->transfer_characteristics;
1909 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1910 color->range <= AVCOL_RANGE_JPEG)
1911 st->codecpar->color_range = color->range;
1912 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1913 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1914 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1915 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1916 st->codecpar->chroma_location =
1917 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1918 (color->chroma_siting_vert - 1) << 7);
1920 if (color->max_cll && color->max_fall) {
1923 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1925 return AVERROR(ENOMEM);
1926 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1927 (uint8_t *)metadata, size);
1929 av_freep(&metadata);
1932 metadata->MaxCLL = color->max_cll;
1933 metadata->MaxFALL = color->max_fall;
1936 if (has_mastering_primaries || has_mastering_luminance) {
1937 // Use similar rationals as other standards.
1938 const int chroma_den = 50000;
1939 const int luma_den = 10000;
1940 AVMasteringDisplayMetadata *metadata =
1941 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1942 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1943 sizeof(AVMasteringDisplayMetadata));
1945 return AVERROR(ENOMEM);
1947 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1948 if (has_mastering_primaries) {
1949 metadata->display_primaries[0][0] = av_make_q(
1950 round(mastering_meta->r_x * chroma_den), chroma_den);
1951 metadata->display_primaries[0][1] = av_make_q(
1952 round(mastering_meta->r_y * chroma_den), chroma_den);
1953 metadata->display_primaries[1][0] = av_make_q(
1954 round(mastering_meta->g_x * chroma_den), chroma_den);
1955 metadata->display_primaries[1][1] = av_make_q(
1956 round(mastering_meta->g_y * chroma_den), chroma_den);
1957 metadata->display_primaries[2][0] = av_make_q(
1958 round(mastering_meta->b_x * chroma_den), chroma_den);
1959 metadata->display_primaries[2][1] = av_make_q(
1960 round(mastering_meta->b_y * chroma_den), chroma_den);
1961 metadata->white_point[0] = av_make_q(
1962 round(mastering_meta->white_x * chroma_den), chroma_den);
1963 metadata->white_point[1] = av_make_q(
1964 round(mastering_meta->white_y * chroma_den), chroma_den);
1965 metadata->has_primaries = 1;
1967 if (has_mastering_luminance) {
1968 metadata->max_luminance = av_make_q(
1969 round(mastering_meta->max_luminance * luma_den), luma_den);
1970 metadata->min_luminance = av_make_q(
1971 round(mastering_meta->min_luminance * luma_den), luma_den);
1972 metadata->has_luminance = 1;
1978 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1979 AVSphericalMapping *spherical;
1980 enum AVSphericalProjection projection;
1981 size_t spherical_size;
1982 uint32_t l = 0, t = 0, r = 0, b = 0;
1983 uint32_t padding = 0;
1987 bytestream2_init(&gb, track->video.projection.private.data,
1988 track->video.projection.private.size);
1990 if (bytestream2_get_byte(&gb) != 0) {
1991 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1995 bytestream2_skip(&gb, 3); // flags
1997 switch (track->video.projection.type) {
1998 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1999 if (track->video.projection.private.size == 20) {
2000 t = bytestream2_get_be32(&gb);
2001 b = bytestream2_get_be32(&gb);
2002 l = bytestream2_get_be32(&gb);
2003 r = bytestream2_get_be32(&gb);
2005 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2006 av_log(NULL, AV_LOG_ERROR,
2007 "Invalid bounding rectangle coordinates "
2008 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2010 return AVERROR_INVALIDDATA;
2012 } else if (track->video.projection.private.size != 0) {
2013 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2014 return AVERROR_INVALIDDATA;
2017 if (l || t || r || b)
2018 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2020 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2022 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2023 if (track->video.projection.private.size < 4) {
2024 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2025 return AVERROR_INVALIDDATA;
2026 } else if (track->video.projection.private.size == 12) {
2027 uint32_t layout = bytestream2_get_be32(&gb);
2029 av_log(NULL, AV_LOG_WARNING,
2030 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2033 projection = AV_SPHERICAL_CUBEMAP;
2034 padding = bytestream2_get_be32(&gb);
2036 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2037 return AVERROR_INVALIDDATA;
2040 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2041 /* No Spherical metadata */
2044 av_log(NULL, AV_LOG_WARNING,
2045 "Unknown spherical metadata type %"PRIu64"\n",
2046 track->video.projection.type);
2050 spherical = av_spherical_alloc(&spherical_size);
2052 return AVERROR(ENOMEM);
2054 spherical->projection = projection;
2056 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2057 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2058 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2060 spherical->padding = padding;
2062 spherical->bound_left = l;
2063 spherical->bound_top = t;
2064 spherical->bound_right = r;
2065 spherical->bound_bottom = b;
2067 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2070 av_freep(&spherical);
2077 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2079 const AVCodecTag *codec_tags;
2081 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2082 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2084 /* Normalize noncompliant private data that starts with the fourcc
2085 * by expanding/shifting the data by 4 bytes and storing the data
2086 * size at the start. */
2087 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2088 int ret = av_buffer_realloc(&track->codec_priv.buf,
2089 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2093 track->codec_priv.data = track->codec_priv.buf->data;
2094 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2095 track->codec_priv.size += 4;
2096 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2099 *fourcc = AV_RL32(track->codec_priv.data + 4);
2100 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2105 static int matroska_parse_tracks(AVFormatContext *s)
2107 MatroskaDemuxContext *matroska = s->priv_data;
2108 MatroskaTrack *tracks = matroska->tracks.elem;
2113 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2114 MatroskaTrack *track = &tracks[i];
2115 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2116 EbmlList *encodings_list = &track->encodings;
2117 MatroskaTrackEncoding *encodings = encodings_list->elem;
2118 uint8_t *extradata = NULL;
2119 int extradata_size = 0;
2120 int extradata_offset = 0;
2121 uint32_t fourcc = 0;
2123 char* key_id_base64 = NULL;
2126 /* Apply some sanity checks. */
2127 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2128 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2129 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2130 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2131 av_log(matroska->ctx, AV_LOG_INFO,
2132 "Unknown or unsupported track type %"PRIu64"\n",
2136 if (!track->codec_id)
2139 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2140 isnan(track->audio.samplerate)) {
2141 av_log(matroska->ctx, AV_LOG_WARNING,
2142 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2143 track->audio.samplerate);
2144 track->audio.samplerate = 8000;
2147 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2148 if (!track->default_duration && track->video.frame_rate > 0) {
2149 double default_duration = 1000000000 / track->video.frame_rate;
2150 if (default_duration > UINT64_MAX || default_duration < 0) {
2151 av_log(matroska->ctx, AV_LOG_WARNING,
2152 "Invalid frame rate %e. Cannot calculate default duration.\n",
2153 track->video.frame_rate);
2155 track->default_duration = default_duration;
2158 if (track->video.display_width == -1)
2159 track->video.display_width = track->video.pixel_width;
2160 if (track->video.display_height == -1)
2161 track->video.display_height = track->video.pixel_height;
2162 if (track->video.color_space.size == 4)
2163 fourcc = AV_RL32(track->video.color_space.data);
2164 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2165 if (!track->audio.out_samplerate)
2166 track->audio.out_samplerate = track->audio.samplerate;
2168 if (encodings_list->nb_elem > 1) {
2169 av_log(matroska->ctx, AV_LOG_ERROR,
2170 "Multiple combined encodings not supported");
2171 } else if (encodings_list->nb_elem == 1) {
2172 if (encodings[0].type) {
2173 if (encodings[0].encryption.key_id.size > 0) {
2174 /* Save the encryption key id to be stored later as a
2176 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2177 key_id_base64 = av_malloc(b64_size);
2178 if (key_id_base64 == NULL)
2179 return AVERROR(ENOMEM);
2181 av_base64_encode(key_id_base64, b64_size,
2182 encodings[0].encryption.key_id.data,
2183 encodings[0].encryption.key_id.size);
2185 encodings[0].scope = 0;
2186 av_log(matroska->ctx, AV_LOG_ERROR,
2187 "Unsupported encoding type");
2191 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2194 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2197 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2199 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2200 encodings[0].scope = 0;
2201 av_log(matroska->ctx, AV_LOG_ERROR,
2202 "Unsupported encoding type");
2203 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2204 uint8_t *codec_priv = track->codec_priv.data;
2205 int ret = matroska_decode_buffer(&track->codec_priv.data,
2206 &track->codec_priv.size,
2209 track->codec_priv.data = NULL;
2210 track->codec_priv.size = 0;
2211 av_log(matroska->ctx, AV_LOG_ERROR,
2212 "Failed to decode codec private data\n");
2215 if (codec_priv != track->codec_priv.data) {
2216 av_buffer_unref(&track->codec_priv.buf);
2217 if (track->codec_priv.data) {
2218 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2219 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2221 if (!track->codec_priv.buf) {
2222 av_freep(&track->codec_priv.data);
2223 track->codec_priv.size = 0;
2224 return AVERROR(ENOMEM);
2231 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2232 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2233 strlen(ff_mkv_codec_tags[j].str))) {
2234 codec_id = ff_mkv_codec_tags[j].id;
2239 st = track->stream = avformat_new_stream(s, NULL);
2241 av_free(key_id_base64);
2242 return AVERROR(ENOMEM);
2245 if (key_id_base64) {
2246 /* export encryption key id as base64 metadata tag */
2247 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2248 av_freep(&key_id_base64);
2251 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2252 track->codec_priv.size >= 40 &&
2253 track->codec_priv.data) {
2254 track->ms_compat = 1;
2255 bit_depth = AV_RL16(track->codec_priv.data + 14);
2256 fourcc = AV_RL32(track->codec_priv.data + 16);
2257 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2260 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2262 extradata_offset = 40;
2263 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2264 track->codec_priv.size >= 14 &&
2265 track->codec_priv.data) {
2267 ffio_init_context(&b, track->codec_priv.data,
2268 track->codec_priv.size,
2269 0, NULL, NULL, NULL, NULL);
2270 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2273 codec_id = st->codecpar->codec_id;
2274 fourcc = st->codecpar->codec_tag;
2275 extradata_offset = FFMIN(track->codec_priv.size, 18);
2276 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2277 /* Normally 36, but allow noncompliant private data */
2278 && (track->codec_priv.size >= 32)
2279 && (track->codec_priv.data)) {
2280 uint16_t sample_size;
2281 int ret = get_qt_codec(track, &fourcc, &codec_id);
2284 sample_size = AV_RB16(track->codec_priv.data + 26);
2286 if (sample_size == 8) {
2287 fourcc = MKTAG('r','a','w',' ');
2288 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2289 } else if (sample_size == 16) {
2290 fourcc = MKTAG('t','w','o','s');
2291 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2294 if ((fourcc == MKTAG('t','w','o','s') ||
2295 fourcc == MKTAG('s','o','w','t')) &&
2297 codec_id = AV_CODEC_ID_PCM_S8;
2298 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2299 (track->codec_priv.size >= 21) &&
2300 (track->codec_priv.data)) {
2301 int ret = get_qt_codec(track, &fourcc, &codec_id);
2304 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2305 fourcc = MKTAG('S','V','Q','3');
2306 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2308 if (codec_id == AV_CODEC_ID_NONE)
2309 av_log(matroska->ctx, AV_LOG_ERROR,
2310 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2311 if (track->codec_priv.size >= 86) {
2312 bit_depth = AV_RB16(track->codec_priv.data + 82);
2313 ffio_init_context(&b, track->codec_priv.data,
2314 track->codec_priv.size,
2315 0, NULL, NULL, NULL, NULL);
2316 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2318 track->has_palette = 1;
2321 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2322 switch (track->audio.bitdepth) {
2324 codec_id = AV_CODEC_ID_PCM_U8;
2327 codec_id = AV_CODEC_ID_PCM_S24BE;
2330 codec_id = AV_CODEC_ID_PCM_S32BE;
2333 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2334 switch (track->audio.bitdepth) {
2336 codec_id = AV_CODEC_ID_PCM_U8;
2339 codec_id = AV_CODEC_ID_PCM_S24LE;
2342 codec_id = AV_CODEC_ID_PCM_S32LE;
2345 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2346 track->audio.bitdepth == 64) {
2347 codec_id = AV_CODEC_ID_PCM_F64LE;
2348 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2349 int profile = matroska_aac_profile(track->codec_id);
2350 int sri = matroska_aac_sri(track->audio.samplerate);
2351 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2353 return AVERROR(ENOMEM);
2354 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2355 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2356 if (strstr(track->codec_id, "SBR")) {
2357 sri = matroska_aac_sri(track->audio.out_samplerate);
2358 extradata[2] = 0x56;
2359 extradata[3] = 0xE5;
2360 extradata[4] = 0x80 | (sri << 3);
2364 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2365 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2366 * Create the "atom size", "tag", and "tag version" fields the
2367 * decoder expects manually. */
2368 extradata_size = 12 + track->codec_priv.size;
2369 extradata = av_mallocz(extradata_size +
2370 AV_INPUT_BUFFER_PADDING_SIZE);
2372 return AVERROR(ENOMEM);
2373 AV_WB32(extradata, extradata_size);
2374 memcpy(&extradata[4], "alac", 4);
2375 AV_WB32(&extradata[8], 0);
2376 memcpy(&extradata[12], track->codec_priv.data,
2377 track->codec_priv.size);
2378 } else if (codec_id == AV_CODEC_ID_TTA) {
2379 extradata_size = 30;
2380 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2382 return AVERROR(ENOMEM);
2383 ffio_init_context(&b, extradata, extradata_size, 1,
2384 NULL, NULL, NULL, NULL);
2385 avio_write(&b, "TTA1", 4);
2387 if (track->audio.channels > UINT16_MAX ||
2388 track->audio.bitdepth > UINT16_MAX) {
2389 av_log(matroska->ctx, AV_LOG_WARNING,
2390 "Too large audio channel number %"PRIu64
2391 " or bitdepth %"PRIu64". Skipping track.\n",
2392 track->audio.channels, track->audio.bitdepth);
2393 av_freep(&extradata);
2394 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2395 return AVERROR_INVALIDDATA;
2399 avio_wl16(&b, track->audio.channels);
2400 avio_wl16(&b, track->audio.bitdepth);
2401 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2402 return AVERROR_INVALIDDATA;
2403 avio_wl32(&b, track->audio.out_samplerate);
2404 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2405 track->audio.out_samplerate,
2406 AV_TIME_BASE * 1000));
2407 } else if (codec_id == AV_CODEC_ID_RV10 ||
2408 codec_id == AV_CODEC_ID_RV20 ||
2409 codec_id == AV_CODEC_ID_RV30 ||
2410 codec_id == AV_CODEC_ID_RV40) {
2411 extradata_offset = 26;
2412 } else if (codec_id == AV_CODEC_ID_RA_144) {
2413 track->audio.out_samplerate = 8000;
2414 track->audio.channels = 1;
2415 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2416 codec_id == AV_CODEC_ID_COOK ||
2417 codec_id == AV_CODEC_ID_ATRAC3 ||
2418 codec_id == AV_CODEC_ID_SIPR)
2419 && track->codec_priv.data) {
2422 ffio_init_context(&b, track->codec_priv.data,
2423 track->codec_priv.size,
2424 0, NULL, NULL, NULL, NULL);
2426 flavor = avio_rb16(&b);
2427 track->audio.coded_framesize = avio_rb32(&b);
2429 track->audio.sub_packet_h = avio_rb16(&b);
2430 track->audio.frame_size = avio_rb16(&b);
2431 track->audio.sub_packet_size = avio_rb16(&b);
2433 track->audio.coded_framesize <= 0 ||
2434 track->audio.sub_packet_h <= 0 ||
2435 track->audio.frame_size <= 0 ||
2436 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2437 return AVERROR_INVALIDDATA;
2438 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2439 track->audio.frame_size);
2440 if (!track->audio.buf)
2441 return AVERROR(ENOMEM);
2442 if (codec_id == AV_CODEC_ID_RA_288) {
2443 st->codecpar->block_align = track->audio.coded_framesize;
2444 track->codec_priv.size = 0;
2446 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2447 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2448 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2449 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2451 st->codecpar->block_align = track->audio.sub_packet_size;
2452 extradata_offset = 78;
2454 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2455 ret = matroska_parse_flac(s, track, &extradata_offset);
2458 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2459 fourcc = AV_RL32(track->codec_priv.data);
2460 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2461 /* we don't need any value stored in CodecPrivate.
2462 make sure that it's not exported as extradata. */
2463 track->codec_priv.size = 0;
2464 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2465 /* For now, propagate only the OBUs, if any. Once libavcodec is
2466 updated to handle isobmff style extradata this can be removed. */
2467 extradata_offset = 4;
2469 track->codec_priv.size -= extradata_offset;
2471 if (codec_id == AV_CODEC_ID_NONE)
2472 av_log(matroska->ctx, AV_LOG_INFO,
2473 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2475 if (track->time_scale < 0.01)
2476 track->time_scale = 1.0;
2477 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2478 1000 * 1000 * 1000); /* 64 bit pts in ns */
2480 /* convert the delay from ns to the track timebase */
2481 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2482 (AVRational){ 1, 1000000000 },
2485 st->codecpar->codec_id = codec_id;
2487 if (strcmp(track->language, "und"))
2488 av_dict_set(&st->metadata, "language", track->language, 0);
2489 av_dict_set(&st->metadata, "title", track->name, 0);
2491 if (track->flag_default)
2492 st->disposition |= AV_DISPOSITION_DEFAULT;
2493 if (track->flag_forced)
2494 st->disposition |= AV_DISPOSITION_FORCED;
2496 if (!st->codecpar->extradata) {
2498 st->codecpar->extradata = extradata;
2499 st->codecpar->extradata_size = extradata_size;
2500 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2501 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2502 return AVERROR(ENOMEM);
2503 memcpy(st->codecpar->extradata,
2504 track->codec_priv.data + extradata_offset,
2505 track->codec_priv.size);
2509 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2510 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2511 int display_width_mul = 1;
2512 int display_height_mul = 1;
2514 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2515 st->codecpar->codec_tag = fourcc;
2517 st->codecpar->bits_per_coded_sample = bit_depth;
2518 st->codecpar->width = track->video.pixel_width;
2519 st->codecpar->height = track->video.pixel_height;
2521 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2522 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2523 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2524 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2526 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2527 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2529 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2530 av_reduce(&st->sample_aspect_ratio.num,
2531 &st->sample_aspect_ratio.den,
2532 st->codecpar->height * track->video.display_width * display_width_mul,
2533 st->codecpar->width * track->video.display_height * display_height_mul,
2536 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2537 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2539 if (track->default_duration) {
2540 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2541 1000000000, track->default_duration, 30000);
2542 #if FF_API_R_FRAME_RATE
2543 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2544 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2545 st->r_frame_rate = st->avg_frame_rate;
2549 /* export stereo mode flag as metadata tag */
2550 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2551 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2553 /* export alpha mode flag as metadata tag */
2554 if (track->video.alpha_mode)
2555 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2557 /* if we have virtual track, mark the real tracks */
2558 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2560 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2562 snprintf(buf, sizeof(buf), "%s_%d",
2563 ff_matroska_video_stereo_plane[planes[j].type], i);
2564 for (k=0; k < matroska->tracks.nb_elem; k++)
2565 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2566 av_dict_set(&tracks[k].stream->metadata,
2567 "stereo_mode", buf, 0);
2571 // add stream level stereo3d side data if it is a supported format
2572 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2573 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2574 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2579 ret = mkv_parse_video_color(st, track);
2582 ret = mkv_parse_video_projection(st, track);
2585 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2586 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2587 st->codecpar->codec_tag = fourcc;
2588 st->codecpar->sample_rate = track->audio.out_samplerate;
2589 st->codecpar->channels = track->audio.channels;
2590 if (!st->codecpar->bits_per_coded_sample)
2591 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2592 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2593 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2594 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2595 st->need_parsing = AVSTREAM_PARSE_FULL;
2596 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2597 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2598 if (track->codec_delay > 0) {
2599 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2600 (AVRational){1, 1000000000},
2601 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2602 48000 : st->codecpar->sample_rate});
2604 if (track->seek_preroll > 0) {
2605 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2606 (AVRational){1, 1000000000},
2607 (AVRational){1, st->codecpar->sample_rate});
2609 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2610 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2612 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2613 st->disposition |= AV_DISPOSITION_CAPTIONS;
2614 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2615 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2616 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2617 st->disposition |= AV_DISPOSITION_METADATA;
2619 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2620 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2627 static int matroska_read_header(AVFormatContext *s)
2629 MatroskaDemuxContext *matroska = s->priv_data;
2630 EbmlList *attachments_list = &matroska->attachments;
2631 EbmlList *chapters_list = &matroska->chapters;
2632 MatroskaAttachment *attachments;
2633 MatroskaChapter *chapters;
2634 uint64_t max_start = 0;
2640 matroska->cues_parsing_deferred = 1;
2642 /* First read the EBML header. */
2643 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2644 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2645 ebml_free(ebml_syntax, &ebml);
2646 return AVERROR_INVALIDDATA;
2648 if (ebml.version > EBML_VERSION ||
2649 ebml.max_size > sizeof(uint64_t) ||
2650 ebml.id_length > sizeof(uint32_t) ||
2651 ebml.doctype_version > 3) {
2652 avpriv_report_missing_feature(matroska->ctx,
2653 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2654 ebml.version, ebml.doctype, ebml.doctype_version);
2655 ebml_free(ebml_syntax, &ebml);
2656 return AVERROR_PATCHWELCOME;
2657 } else if (ebml.doctype_version == 3) {
2658 av_log(matroska->ctx, AV_LOG_WARNING,
2659 "EBML header using unsupported features\n"
2660 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2661 ebml.version, ebml.doctype, ebml.doctype_version);
2663 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2664 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2666 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2667 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2668 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2669 ebml_free(ebml_syntax, &ebml);
2670 return AVERROR_INVALIDDATA;
2673 ebml_free(ebml_syntax, &ebml);
2675 /* The next thing is a segment. */
2676 pos = avio_tell(matroska->ctx->pb);
2677 res = ebml_parse(matroska, matroska_segments, matroska);
2678 // try resyncing until we find a EBML_STOP type element.
2680 res = matroska_resync(matroska, pos);
2683 pos = avio_tell(matroska->ctx->pb);
2684 res = ebml_parse(matroska, matroska_segment, matroska);
2686 /* Set data_offset as it might be needed later by seek_frame_generic. */
2687 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2688 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2689 matroska_execute_seekhead(matroska);
2691 if (!matroska->time_scale)
2692 matroska->time_scale = 1000000;
2693 if (matroska->duration)
2694 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2695 1000 / AV_TIME_BASE;
2696 av_dict_set(&s->metadata, "title", matroska->title, 0);
2697 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2699 if (matroska->date_utc.size == 8)
2700 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2702 res = matroska_parse_tracks(s);
2706 attachments = attachments_list->elem;
2707 for (j = 0; j < attachments_list->nb_elem; j++) {
2708 if (!(attachments[j].filename && attachments[j].mime &&
2709 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2710 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2712 AVStream *st = avformat_new_stream(s, NULL);
2715 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2716 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2717 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2719 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2720 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2721 strlen(ff_mkv_image_mime_tags[i].str))) {
2722 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2727 attachments[j].stream = st;
2729 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2730 AVPacket *pkt = &st->attached_pic;
2732 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2733 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2735 av_init_packet(pkt);
2736 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2738 return AVERROR(ENOMEM);
2739 pkt->data = attachments[j].bin.data;
2740 pkt->size = attachments[j].bin.size;
2741 pkt->stream_index = st->index;
2742 pkt->flags |= AV_PKT_FLAG_KEY;
2744 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2745 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2747 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2748 attachments[j].bin.size);
2750 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2751 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2752 strlen(ff_mkv_mime_tags[i].str))) {
2753 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2761 chapters = chapters_list->elem;
2762 for (i = 0; i < chapters_list->nb_elem; i++)
2763 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2764 (max_start == 0 || chapters[i].start > max_start)) {
2765 chapters[i].chapter =
2766 avpriv_new_chapter(s, chapters[i].uid,
2767 (AVRational) { 1, 1000000000 },
2768 chapters[i].start, chapters[i].end,
2770 if (chapters[i].chapter) {
2771 av_dict_set(&chapters[i].chapter->metadata,
2772 "title", chapters[i].title, 0);
2774 max_start = chapters[i].start;
2777 matroska_add_index_entries(matroska);
2779 matroska_convert_tags(s);
2783 matroska_read_close(s);
2788 * Put one packet in an application-supplied AVPacket struct.
2789 * Returns 0 on success or -1 on failure.
2791 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2794 if (matroska->queue) {
2795 MatroskaTrack *tracks = matroska->tracks.elem;
2796 MatroskaTrack *track;
2798 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2799 track = &tracks[pkt->stream_index];
2800 if (track->has_palette) {
2801 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2803 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2805 memcpy(pal, track->palette, AVPALETTE_SIZE);
2807 track->has_palette = 0;
2816 * Free all packets in our internal queue.
2818 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2820 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2823 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2824 int *buf_size, int type,
2825 uint32_t **lace_buf, int *laces)
2827 int res = 0, n, size = *buf_size;
2828 uint8_t *data = *buf;
2829 uint32_t *lace_size;
2833 *lace_buf = av_malloc(sizeof(**lace_buf));
2835 return AVERROR(ENOMEM);
2837 *lace_buf[0] = size;
2841 av_assert0(size > 0);
2845 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2847 return AVERROR(ENOMEM);
2850 case 0x1: /* Xiph lacing */
2854 for (n = 0; res == 0 && n < *laces - 1; n++) {
2858 if (size <= total) {
2859 res = AVERROR_INVALIDDATA;
2864 lace_size[n] += temp;
2871 if (size <= total) {
2872 res = AVERROR_INVALIDDATA;
2876 lace_size[n] = size - total;
2880 case 0x2: /* fixed-size lacing */
2881 if (size % (*laces)) {
2882 res = AVERROR_INVALIDDATA;
2885 for (n = 0; n < *laces; n++)
2886 lace_size[n] = size / *laces;
2889 case 0x3: /* EBML lacing */
2893 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2894 if (n < 0 || num > INT_MAX) {
2895 av_log(matroska->ctx, AV_LOG_INFO,
2896 "EBML block data error\n");
2897 res = n<0 ? n : AVERROR_INVALIDDATA;
2902 total = lace_size[0] = num;
2903 for (n = 1; res == 0 && n < *laces - 1; n++) {
2906 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2907 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2908 av_log(matroska->ctx, AV_LOG_INFO,
2909 "EBML block data error\n");
2910 res = r<0 ? r : AVERROR_INVALIDDATA;
2915 lace_size[n] = lace_size[n - 1] + snum;
2916 total += lace_size[n];
2918 if (size <= total) {
2919 res = AVERROR_INVALIDDATA;
2922 lace_size[*laces - 1] = size - total;
2928 *lace_buf = lace_size;
2934 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2935 MatroskaTrack *track, AVStream *st,
2936 uint8_t *data, int size, uint64_t timecode,
2939 int a = st->codecpar->block_align;
2940 int sps = track->audio.sub_packet_size;
2941 int cfs = track->audio.coded_framesize;
2942 int h = track->audio.sub_packet_h;
2943 int y = track->audio.sub_packet_cnt;
2944 int w = track->audio.frame_size;
2947 if (!track->audio.pkt_cnt) {
2948 if (track->audio.sub_packet_cnt == 0)
2949 track->audio.buf_timecode = timecode;
2950 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2951 if (size < cfs * h / 2) {
2952 av_log(matroska->ctx, AV_LOG_ERROR,
2953 "Corrupt int4 RM-style audio packet size\n");
2954 return AVERROR_INVALIDDATA;
2956 for (x = 0; x < h / 2; x++)
2957 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2958 data + x * cfs, cfs);
2959 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2961 av_log(matroska->ctx, AV_LOG_ERROR,
2962 "Corrupt sipr RM-style audio packet size\n");
2963 return AVERROR_INVALIDDATA;
2965 memcpy(track->audio.buf + y * w, data, w);
2967 if (size < sps * w / sps || h<=0 || w%sps) {
2968 av_log(matroska->ctx, AV_LOG_ERROR,
2969 "Corrupt generic RM-style audio packet size\n");
2970 return AVERROR_INVALIDDATA;
2972 for (x = 0; x < w / sps; x++)
2973 memcpy(track->audio.buf +
2974 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2975 data + x * sps, sps);
2978 if (++track->audio.sub_packet_cnt >= h) {
2979 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2980 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2981 track->audio.sub_packet_cnt = 0;
2982 track->audio.pkt_cnt = h * w / a;
2986 while (track->audio.pkt_cnt) {
2988 AVPacket pktl, *pkt = &pktl;
2990 ret = av_new_packet(pkt, a);
2995 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2997 pkt->pts = track->audio.buf_timecode;
2998 track->audio.buf_timecode = AV_NOPTS_VALUE;
3000 pkt->stream_index = st->index;
3001 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3003 av_packet_unref(pkt);
3004 return AVERROR(ENOMEM);
3011 /* reconstruct full wavpack blocks from mangled matroska ones */
3012 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3013 uint8_t **pdst, int *size)
3015 uint8_t *dst = NULL;
3020 int ret, offset = 0;
3022 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3023 return AVERROR_INVALIDDATA;
3025 ver = AV_RL16(track->stream->codecpar->extradata);
3027 samples = AV_RL32(src);
3031 while (srclen >= 8) {
3036 uint32_t flags = AV_RL32(src);
3037 uint32_t crc = AV_RL32(src + 4);
3041 multiblock = (flags & 0x1800) != 0x1800;
3044 ret = AVERROR_INVALIDDATA;
3047 blocksize = AV_RL32(src);
3053 if (blocksize > srclen) {
3054 ret = AVERROR_INVALIDDATA;
3058 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3060 ret = AVERROR(ENOMEM);
3064 dstlen += blocksize + 32;
3066 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3067 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3068 AV_WL16(dst + offset + 8, ver); // version
3069 AV_WL16(dst + offset + 10, 0); // track/index_no
3070 AV_WL32(dst + offset + 12, 0); // total samples
3071 AV_WL32(dst + offset + 16, 0); // block index
3072 AV_WL32(dst + offset + 20, samples); // number of samples
3073 AV_WL32(dst + offset + 24, flags); // flags
3074 AV_WL32(dst + offset + 28, crc); // crc
3075 memcpy(dst + offset + 32, src, blocksize); // block data
3078 srclen -= blocksize;
3079 offset += blocksize + 32;
3082 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3094 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3095 uint8_t **pdst, int *size)
3100 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3101 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3103 return AVERROR(ENOMEM);
3105 AV_WB32(dst, dstlen);
3106 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3107 memcpy(dst + 8, src, dstlen);
3108 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3118 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3119 MatroskaTrack *track,
3121 uint8_t *data, int data_len,
3126 AVPacket pktl, *pkt = &pktl;
3127 uint8_t *id, *settings, *text, *buf;
3128 int id_len, settings_len, text_len;
3133 return AVERROR_INVALIDDATA;
3136 q = data + data_len;
3141 if (*p == '\r' || *p == '\n') {
3150 if (p >= q || *p != '\n')
3151 return AVERROR_INVALIDDATA;
3157 if (*p == '\r' || *p == '\n') {
3158 settings_len = p - settings;
3166 if (p >= q || *p != '\n')
3167 return AVERROR_INVALIDDATA;
3172 while (text_len > 0) {
3173 const int len = text_len - 1;
3174 const uint8_t c = p[len];
3175 if (c != '\r' && c != '\n')
3181 return AVERROR_INVALIDDATA;
3183 err = av_new_packet(pkt, text_len);
3188 memcpy(pkt->data, text, text_len);
3191 buf = av_packet_new_side_data(pkt,
3192 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3195 av_packet_unref(pkt);
3196 return AVERROR(ENOMEM);
3198 memcpy(buf, id, id_len);
3201 if (settings_len > 0) {
3202 buf = av_packet_new_side_data(pkt,
3203 AV_PKT_DATA_WEBVTT_SETTINGS,
3206 av_packet_unref(pkt);
3207 return AVERROR(ENOMEM);
3209 memcpy(buf, settings, settings_len);
3212 // Do we need this for subtitles?
3213 // pkt->flags = AV_PKT_FLAG_KEY;
3215 pkt->stream_index = st->index;
3216 pkt->pts = timecode;
3218 // Do we need this for subtitles?
3219 // pkt->dts = timecode;
3221 pkt->duration = duration;
3224 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3226 av_packet_unref(pkt);
3227 return AVERROR(ENOMEM);
3233 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3234 MatroskaTrack *track, AVStream *st,
3235 AVBufferRef *buf, uint8_t *data, int pkt_size,
3236 uint64_t timecode, uint64_t lace_duration,
3237 int64_t pos, int is_keyframe,
3238 uint8_t *additional, uint64_t additional_id, int additional_size,
3239 int64_t discard_padding)
3241 MatroskaTrackEncoding *encodings = track->encodings.elem;
3242 uint8_t *pkt_data = data;
3244 AVPacket pktl, *pkt = &pktl;
3246 if (encodings && !encodings->type && encodings->scope & 1) {
3247 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3252 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3254 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3256 av_log(matroska->ctx, AV_LOG_ERROR,
3257 "Error parsing a wavpack block.\n");
3260 if (pkt_data != data)
3261 av_freep(&pkt_data);
3265 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3267 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3269 av_log(matroska->ctx, AV_LOG_ERROR,
3270 "Error parsing a prores block.\n");
3273 if (pkt_data != data)
3274 av_freep(&pkt_data);
3278 av_init_packet(pkt);
3279 if (pkt_data != data)
3280 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3283 pkt->buf = av_buffer_ref(buf);
3286 res = AVERROR(ENOMEM);
3290 pkt->data = pkt_data;
3291 pkt->size = pkt_size;
3292 pkt->flags = is_keyframe;
3293 pkt->stream_index = st->index;
3295 if (additional_size > 0) {
3296 uint8_t *side_data = av_packet_new_side_data(pkt,
3297 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3298 additional_size + 8);
3300 av_packet_unref(pkt);
3301 return AVERROR(ENOMEM);
3303 AV_WB64(side_data, additional_id);
3304 memcpy(side_data + 8, additional, additional_size);
3307 if (discard_padding) {
3308 uint8_t *side_data = av_packet_new_side_data(pkt,
3309 AV_PKT_DATA_SKIP_SAMPLES,
3312 av_packet_unref(pkt);
3313 return AVERROR(ENOMEM);
3315 discard_padding = av_rescale_q(discard_padding,
3316 (AVRational){1, 1000000000},
3317 (AVRational){1, st->codecpar->sample_rate});
3318 if (discard_padding > 0) {
3319 AV_WL32(side_data + 4, discard_padding);
3321 AV_WL32(side_data, -discard_padding);
3325 if (track->ms_compat)
3326 pkt->dts = timecode;
3328 pkt->pts = timecode;
3330 pkt->duration = lace_duration;
3332 #if FF_API_CONVERGENCE_DURATION
3333 FF_DISABLE_DEPRECATION_WARNINGS
3334 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3335 pkt->convergence_duration = lace_duration;
3337 FF_ENABLE_DEPRECATION_WARNINGS
3340 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3342 av_packet_unref(pkt);
3343 return AVERROR(ENOMEM);
3349 if (pkt_data != data)
3350 av_freep(&pkt_data);
3354 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3355 int size, int64_t pos, uint64_t cluster_time,
3356 uint64_t block_duration, int is_keyframe,
3357 uint8_t *additional, uint64_t additional_id, int additional_size,
3358 int64_t cluster_pos, int64_t discard_padding)
3360 uint64_t timecode = AV_NOPTS_VALUE;
3361 MatroskaTrack *track;
3365 uint32_t *lace_size = NULL;
3366 int n, flags, laces = 0;
3368 int trust_default_duration = 1;
3370 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3376 track = matroska_find_track_by_num(matroska, num);
3377 if (!track || !track->stream) {
3378 av_log(matroska->ctx, AV_LOG_INFO,
3379 "Invalid stream %"PRIu64"\n", num);
3380 return AVERROR_INVALIDDATA;
3381 } else if (size <= 3)
3384 if (st->discard >= AVDISCARD_ALL)
3386 av_assert1(block_duration != AV_NOPTS_VALUE);
3388 block_time = sign_extend(AV_RB16(data), 16);
3392 if (is_keyframe == -1)
3393 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3395 if (cluster_time != (uint64_t) -1 &&
3396 (block_time >= 0 || cluster_time >= -block_time)) {
3397 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3398 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3399 timecode < track->end_timecode)
3400 is_keyframe = 0; /* overlapping subtitles are not key frame */
3402 ff_reduce_index(matroska->ctx, st->index);
3403 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3408 if (matroska->skip_to_keyframe &&
3409 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3410 // Compare signed timecodes. Timecode may be negative due to codec delay
3411 // offset. We don't support timestamps greater than int64_t anyway - see
3413 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3416 matroska->skip_to_keyframe = 0;
3417 else if (!st->skip_to_keyframe) {
3418 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3419 matroska->skip_to_keyframe = 0;
3423 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3424 &lace_size, &laces);
3429 if (track->audio.samplerate == 8000) {
3430 // If this is needed for more codecs, then add them here
3431 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3432 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3433 trust_default_duration = 0;
3437 if (!block_duration && trust_default_duration)
3438 block_duration = track->default_duration * laces / matroska->time_scale;
3440 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3441 track->end_timecode =
3442 FFMAX(track->end_timecode, timecode + block_duration);
3444 for (n = 0; n < laces; n++) {
3445 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3447 if (lace_size[n] > size) {
3448 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3452 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3453 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3454 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3455 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3456 st->codecpar->block_align && track->audio.sub_packet_size) {
3457 res = matroska_parse_rm_audio(matroska, track, st, data,
3463 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3464 res = matroska_parse_webvtt(matroska, track, st,
3466 timecode, lace_duration,
3471 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3472 timecode, lace_duration, pos,
3473 !n ? is_keyframe : 0,
3474 additional, additional_id, additional_size,
3480 if (timecode != AV_NOPTS_VALUE)
3481 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3482 data += lace_size[n];
3483 size -= lace_size[n];
3491 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3493 MatroskaCluster *cluster = &matroska->current_cluster;
3494 MatroskaBlock *block = &cluster->block;
3496 res = ebml_parse(matroska,
3497 matroska_cluster_parsing,
3502 ebml_level_end(matroska);
3503 cluster->pos = avio_tell(matroska->ctx->pb);
3504 /* sizeof the ID which was already read */
3505 if (matroska->current_id)
3507 res = ebml_parse(matroska,
3510 /* Try parsing the block again. */
3512 res = ebml_parse(matroska,
3513 matroska_cluster_parsing,
3517 if (!res && block->bin.size > 0) {
3518 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3519 uint8_t* additional = block->additional.size > 0 ?
3520 block->additional.data : NULL;
3522 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3523 block->bin.size, block->bin.pos,
3524 matroska->current_cluster.timecode,
3525 block->duration, is_keyframe,
3526 additional, block->additional_id,
3527 block->additional.size,
3529 block->discard_padding);
3532 ebml_free(matroska_blockgroup, block);
3533 memset(block, 0, sizeof(*block));
3538 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3540 MatroskaDemuxContext *matroska = s->priv_data;
3543 while (matroska_deliver_packet(matroska, pkt)) {
3544 int64_t pos = avio_tell(matroska->ctx->pb);
3546 return (ret < 0) ? ret : AVERROR_EOF;
3547 if (matroska_parse_cluster(matroska) < 0)
3548 ret = matroska_resync(matroska, pos);
3554 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3555 int64_t timestamp, int flags)
3557 MatroskaDemuxContext *matroska = s->priv_data;
3558 MatroskaTrack *tracks = NULL;
3559 AVStream *st = s->streams[stream_index];
3562 /* Parse the CUES now since we need the index data to seek. */
3563 if (matroska->cues_parsing_deferred > 0) {
3564 matroska->cues_parsing_deferred = 0;
3565 matroska_parse_cues(matroska);
3568 if (!st->nb_index_entries)
3570 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3572 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3573 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3575 matroska->current_id = 0;
3576 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3577 matroska_clear_queue(matroska);
3578 if (matroska_parse_cluster(matroska) < 0)
3583 matroska_clear_queue(matroska);
3584 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3587 tracks = matroska->tracks.elem;
3588 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3589 tracks[i].audio.pkt_cnt = 0;
3590 tracks[i].audio.sub_packet_cnt = 0;
3591 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3592 tracks[i].end_timecode = 0;
3595 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
3596 matroska->current_id = 0;
3597 if (flags & AVSEEK_FLAG_ANY) {
3598 st->skip_to_keyframe = 0;
3599 matroska->skip_to_timecode = timestamp;
3601 st->skip_to_keyframe = 1;
3602 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3604 matroska->skip_to_keyframe = 1;
3606 matroska->num_levels = 0;
3607 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3610 // slightly hackish but allows proper fallback to
3611 // the generic seeking code.
3612 matroska_clear_queue(matroska);
3613 matroska->current_id = 0;
3614 st->skip_to_keyframe =
3615 matroska->skip_to_keyframe = 0;
3617 matroska->num_levels = 0;
3621 static int matroska_read_close(AVFormatContext *s)
3623 MatroskaDemuxContext *matroska = s->priv_data;
3624 MatroskaTrack *tracks = matroska->tracks.elem;
3627 matroska_clear_queue(matroska);
3629 for (n = 0; n < matroska->tracks.nb_elem; n++)
3630 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3631 av_freep(&tracks[n].audio.buf);
3632 ebml_free(matroska_segment, matroska);
3638 int64_t start_time_ns;
3639 int64_t end_time_ns;
3640 int64_t start_offset;
3644 /* This function searches all the Cues and returns the CueDesc corresponding to
3645 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3646 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3648 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3649 MatroskaDemuxContext *matroska = s->priv_data;
3652 int nb_index_entries = s->streams[0]->nb_index_entries;
3653 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3654 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3655 for (i = 1; i < nb_index_entries; i++) {
3656 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3657 index_entries[i].timestamp * matroska->time_scale > ts) {
3662 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3663 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3664 if (i != nb_index_entries - 1) {
3665 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3666 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3668 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3669 // FIXME: this needs special handling for files where Cues appear
3670 // before Clusters. the current logic assumes Cues appear after
3672 cue_desc.end_offset = cues_start - matroska->segment_start;
3677 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3679 MatroskaDemuxContext *matroska = s->priv_data;
3680 int64_t cluster_pos, before_pos;
3682 if (s->streams[0]->nb_index_entries <= 0) return 0;
3683 // seek to the first cluster using cues.
3684 index = av_index_search_timestamp(s->streams[0], 0, 0);
3685 if (index < 0) return 0;
3686 cluster_pos = s->streams[0]->index_entries[index].pos;
3687 before_pos = avio_tell(s->pb);
3689 uint64_t cluster_id, cluster_length;
3692 avio_seek(s->pb, cluster_pos, SEEK_SET);
3693 // read cluster id and length
3694 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3695 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3697 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3700 avio_seek(s->pb, cluster_pos, SEEK_SET);
3701 matroska->current_id = 0;
3702 matroska_clear_queue(matroska);
3703 if (matroska_parse_cluster(matroska) < 0 ||
3707 pkt = &matroska->queue->pkt;
3708 // 4 + read is the length of the cluster id and the cluster length field.
3709 cluster_pos += 4 + read + cluster_length;
3710 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3715 avio_seek(s->pb, before_pos, SEEK_SET);
3719 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3720 double min_buffer, double* buffer,
3721 double* sec_to_download, AVFormatContext *s,
3724 double nano_seconds_per_second = 1000000000.0;
3725 double time_sec = time_ns / nano_seconds_per_second;
3727 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3728 int64_t end_time_ns = time_ns + time_to_search_ns;
3729 double sec_downloaded = 0.0;
3730 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3731 if (desc_curr.start_time_ns == -1)
3733 *sec_to_download = 0.0;
3735 // Check for non cue start time.
3736 if (time_ns > desc_curr.start_time_ns) {
3737 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3738 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3739 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3740 double timeToDownload = (cueBytes * 8.0) / bps;
3742 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3743 *sec_to_download += timeToDownload;
3745 // Check if the search ends within the first cue.
3746 if (desc_curr.end_time_ns >= end_time_ns) {
3747 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3748 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3749 sec_downloaded = percent_to_sub * sec_downloaded;
3750 *sec_to_download = percent_to_sub * *sec_to_download;
3753 if ((sec_downloaded + *buffer) <= min_buffer) {
3757 // Get the next Cue.
3758 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3761 while (desc_curr.start_time_ns != -1) {
3762 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3763 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3764 double desc_sec = desc_ns / nano_seconds_per_second;
3765 double bits = (desc_bytes * 8.0);
3766 double time_to_download = bits / bps;
3768 sec_downloaded += desc_sec - time_to_download;
3769 *sec_to_download += time_to_download;
3771 if (desc_curr.end_time_ns >= end_time_ns) {
3772 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3773 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3774 sec_downloaded = percent_to_sub * sec_downloaded;
3775 *sec_to_download = percent_to_sub * *sec_to_download;
3777 if ((sec_downloaded + *buffer) <= min_buffer)
3782 if ((sec_downloaded + *buffer) <= min_buffer) {
3787 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3789 *buffer = *buffer + sec_downloaded;
3793 /* This function computes the bandwidth of the WebM file with the help of
3794 * buffer_size_after_time_downloaded() function. Both of these functions are
3795 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3796 * Matroska parsing mechanism.
3798 * Returns the bandwidth of the file on success; -1 on error.
3800 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3802 MatroskaDemuxContext *matroska = s->priv_data;
3803 AVStream *st = s->streams[0];
3804 double bandwidth = 0.0;
3807 for (i = 0; i < st->nb_index_entries; i++) {
3808 int64_t prebuffer_ns = 1000000000;
3809 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3810 double nano_seconds_per_second = 1000000000.0;
3811 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3812 double prebuffer_bytes = 0.0;
3813 int64_t temp_prebuffer_ns = prebuffer_ns;
3814 int64_t pre_bytes, pre_ns;
3815 double pre_sec, prebuffer, bits_per_second;
3816 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3818 // Start with the first Cue.
3819 CueDesc desc_end = desc_beg;
3821 // Figure out how much data we have downloaded for the prebuffer. This will
3822 // be used later to adjust the bits per sample to try.
3823 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3824 // Prebuffered the entire Cue.
3825 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3826 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3827 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3829 if (desc_end.start_time_ns == -1) {
3830 // The prebuffer is larger than the duration.
3831 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3833 bits_per_second = 0.0;
3835 // The prebuffer ends in the last Cue. Estimate how much data was
3837 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3838 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3839 pre_sec = pre_ns / nano_seconds_per_second;
3841 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3843 prebuffer = prebuffer_ns / nano_seconds_per_second;
3845 // Set this to 0.0 in case our prebuffer buffers the entire video.
3846 bits_per_second = 0.0;
3848 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3849 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3850 double desc_sec = desc_ns / nano_seconds_per_second;
3851 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3853 // Drop the bps by the percentage of bytes buffered.
3854 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3855 double mod_bits_per_second = calc_bits_per_second * percent;
3857 if (prebuffer < desc_sec) {
3859 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3861 // Add 1 so the bits per second should be a little bit greater than file
3863 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3864 const double min_buffer = 0.0;
3865 double buffer = prebuffer;
3866 double sec_to_download = 0.0;
3868 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3869 min_buffer, &buffer, &sec_to_download,
3873 } else if (rv == 0) {
3874 bits_per_second = (double)(bps);
3879 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3880 } while (desc_end.start_time_ns != -1);
3882 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3884 return (int64_t)bandwidth;
3887 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3889 MatroskaDemuxContext *matroska = s->priv_data;
3890 EbmlList *seekhead_list = &matroska->seekhead;
3891 MatroskaSeekhead *seekhead = seekhead_list->elem;
3893 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3897 // determine cues start and end positions
3898 for (i = 0; i < seekhead_list->nb_elem; i++)
3899 if (seekhead[i].id == MATROSKA_ID_CUES)
3902 if (i >= seekhead_list->nb_elem) return -1;
3904 before_pos = avio_tell(matroska->ctx->pb);
3905 cues_start = seekhead[i].pos + matroska->segment_start;
3906 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3907 // cues_end is computed as cues_start + cues_length + length of the
3908 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3909 // cues_end is inclusive and the above sum is reduced by 1.
3910 uint64_t cues_length, cues_id;
3912 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3913 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3914 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3915 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3918 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3920 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3921 if (cues_start == -1 || cues_end == -1) return -1;
3924 matroska_parse_cues(matroska);
3927 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3930 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3932 // if the file has cues at the start, fix up the init range so tht
3933 // it does not include it
3934 if (cues_start <= init_range)
3935 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3938 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3939 if (bandwidth < 0) return -1;
3940 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3942 // check if all clusters start with key frames
3943 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3945 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3946 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3947 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3948 if (!buf) return -1;
3950 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3951 int ret = snprintf(buf + end, 20,
3952 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3953 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3954 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3955 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3957 return AVERROR_INVALIDDATA;
3961 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3967 static int webm_dash_manifest_read_header(AVFormatContext *s)
3970 int ret = matroska_read_header(s);
3972 MatroskaTrack *tracks;
3973 MatroskaDemuxContext *matroska = s->priv_data;
3975 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3978 if (!s->nb_streams) {
3979 matroska_read_close(s);
3980 av_log(s, AV_LOG_ERROR, "No streams found\n");
3981 return AVERROR_INVALIDDATA;
3984 if (!matroska->is_live) {
3985 buf = av_asprintf("%g", matroska->duration);
3986 if (!buf) return AVERROR(ENOMEM);
3987 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3990 // initialization range
3991 // 5 is the offset of Cluster ID.
3992 init_range = avio_tell(s->pb) - 5;
3993 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3996 // basename of the file
3997 buf = strrchr(s->url, '/');
3998 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4001 tracks = matroska->tracks.elem;
4002 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4004 // parse the cues and populate Cue related fields
4005 if (!matroska->is_live) {
4006 ret = webm_dash_manifest_cues(s, init_range);
4008 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4013 // use the bandwidth from the command line if it was provided
4014 if (matroska->bandwidth > 0) {
4015 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4016 matroska->bandwidth, 0);
4021 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4026 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4027 static const AVOption options[] = {
4028 { "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 },
4029 { "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 },
4033 static const AVClass webm_dash_class = {
4034 .class_name = "WebM DASH Manifest demuxer",
4035 .item_name = av_default_item_name,
4037 .version = LIBAVUTIL_VERSION_INT,
4040 AVInputFormat ff_matroska_demuxer = {
4041 .name = "matroska,webm",
4042 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4043 .extensions = "mkv,mk3d,mka,mks",
4044 .priv_data_size = sizeof(MatroskaDemuxContext),
4045 .read_probe = matroska_probe,
4046 .read_header = matroska_read_header,
4047 .read_packet = matroska_read_packet,
4048 .read_close = matroska_read_close,
4049 .read_seek = matroska_read_seek,
4050 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4053 AVInputFormat ff_webm_dash_manifest_demuxer = {
4054 .name = "webm_dash_manifest",
4055 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4056 .priv_data_size = sizeof(MatroskaDemuxContext),
4057 .read_header = webm_dash_manifest_read_header,
4058 .read_packet = webm_dash_manifest_read_packet,
4059 .read_close = matroska_read_close,
4060 .priv_class = &webm_dash_class,