2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
89 typedef const struct EbmlSyntax {
99 const struct EbmlSyntax *n;
103 typedef struct EbmlList {
108 typedef struct EbmlBin {
115 typedef struct Ebml {
120 uint64_t doctype_version;
123 typedef struct MatroskaTrackCompression {
126 } MatroskaTrackCompression;
128 typedef struct MatroskaTrackEncryption {
131 } MatroskaTrackEncryption;
133 typedef struct MatroskaTrackEncoding {
136 MatroskaTrackCompression compression;
137 MatroskaTrackEncryption encryption;
138 } MatroskaTrackEncoding;
140 typedef struct MatroskaMasteringMeta {
149 double max_luminance;
150 double min_luminance;
151 } MatroskaMasteringMeta;
153 typedef struct MatroskaTrackVideoColor {
154 uint64_t matrix_coefficients;
155 uint64_t bits_per_channel;
156 uint64_t chroma_sub_horz;
157 uint64_t chroma_sub_vert;
158 uint64_t cb_sub_horz;
159 uint64_t cb_sub_vert;
160 uint64_t chroma_siting_horz;
161 uint64_t chroma_siting_vert;
163 uint64_t transfer_characteristics;
167 MatroskaMasteringMeta mastering_meta;
168 } MatroskaTrackVideoColor;
170 typedef struct MatroskaTrackVideoProjection {
176 } MatroskaTrackVideoProjection;
178 typedef struct MatroskaTrackVideo {
180 uint64_t display_width;
181 uint64_t display_height;
182 uint64_t pixel_width;
183 uint64_t pixel_height;
185 uint64_t display_unit;
187 uint64_t field_order;
188 uint64_t stereo_mode;
191 MatroskaTrackVideoProjection projection;
192 } MatroskaTrackVideo;
194 typedef struct MatroskaTrackAudio {
196 double out_samplerate;
200 /* real audio header (extracted from extradata) */
207 uint64_t buf_timecode;
209 } MatroskaTrackAudio;
211 typedef struct MatroskaTrackPlane {
214 } MatroskaTrackPlane;
216 typedef struct MatroskaTrackOperation {
217 EbmlList combine_planes;
218 } MatroskaTrackOperation;
220 typedef struct MatroskaTrack {
229 uint64_t default_duration;
230 uint64_t flag_default;
231 uint64_t flag_forced;
232 uint64_t seek_preroll;
233 MatroskaTrackVideo video;
234 MatroskaTrackAudio audio;
235 MatroskaTrackOperation operation;
237 uint64_t codec_delay;
238 uint64_t codec_delay_in_track_tb;
241 int64_t end_timecode;
243 uint64_t max_block_additional_id;
245 uint32_t palette[AVPALETTE_COUNT];
249 typedef struct MatroskaAttachment {
256 } MatroskaAttachment;
258 typedef struct MatroskaChapter {
267 typedef struct MatroskaIndexPos {
272 typedef struct MatroskaIndex {
277 typedef struct MatroskaTag {
285 typedef struct MatroskaTagTarget {
293 typedef struct MatroskaTags {
294 MatroskaTagTarget target;
298 typedef struct MatroskaSeekhead {
303 typedef struct MatroskaLevel {
308 typedef struct MatroskaBlock {
313 uint64_t additional_id;
315 int64_t discard_padding;
318 typedef struct MatroskaCluster {
324 typedef struct MatroskaLevel1Element {
328 } MatroskaLevel1Element;
330 typedef struct MatroskaDemuxContext {
331 const AVClass *class;
332 AVFormatContext *ctx;
336 MatroskaLevel levels[EBML_MAX_DEPTH];
345 EbmlList attachments;
351 /* byte position of the segment inside the stream */
352 int64_t segment_start;
354 /* the packet queue */
356 AVPacketList *queue_end;
360 /* What to skip before effectively reading a packet. */
361 int skip_to_keyframe;
362 uint64_t skip_to_timecode;
364 /* File has a CUES element, but we defer parsing until it is needed. */
365 int cues_parsing_deferred;
367 /* Level1 elements and whether they were read yet */
368 MatroskaLevel1Element level1_elems[64];
369 int num_level1_elems;
371 MatroskaCluster current_cluster;
373 /* WebM DASH Manifest live flag */
376 /* Bandwidth value for WebM DASH Manifest */
378 } MatroskaDemuxContext;
380 static const EbmlSyntax ebml_header[] = {
381 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
382 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
383 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
384 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
385 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
386 { EBML_ID_EBMLVERSION, EBML_NONE },
387 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
391 static const EbmlSyntax ebml_syntax[] = {
392 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
396 static const EbmlSyntax matroska_info[] = {
397 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
398 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
399 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
400 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
401 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
402 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
403 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
407 static const EbmlSyntax matroska_mastering_meta[] = {
408 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
421 static const EbmlSyntax matroska_track_video_color[] = {
422 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
423 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
434 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
439 static const EbmlSyntax matroska_track_video_projection[] = {
440 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
441 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
448 static const EbmlSyntax matroska_track_video[] = {
449 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
450 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
451 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
452 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
453 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
454 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
455 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
456 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
457 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
458 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
462 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
463 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
464 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
466 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
470 static const EbmlSyntax matroska_track_audio[] = {
471 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
472 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
473 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
474 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
478 static const EbmlSyntax matroska_track_encoding_compression[] = {
479 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
480 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
484 static const EbmlSyntax matroska_track_encoding_encryption[] = {
485 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
486 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
487 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
494 static const EbmlSyntax matroska_track_encoding[] = {
495 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
496 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
497 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
498 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
499 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
503 static const EbmlSyntax matroska_track_encodings[] = {
504 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
508 static const EbmlSyntax matroska_track_plane[] = {
509 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
510 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
514 static const EbmlSyntax matroska_track_combine_planes[] = {
515 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
519 static const EbmlSyntax matroska_track_operation[] = {
520 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
524 static const EbmlSyntax matroska_track[] = {
525 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
526 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
527 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
528 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
529 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
530 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
531 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
532 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
533 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
534 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
535 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
536 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
537 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
538 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
539 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
540 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
541 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
542 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
543 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
544 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
545 { MATROSKA_ID_CODECNAME, EBML_NONE },
546 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
547 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
548 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
549 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
550 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
554 static const EbmlSyntax matroska_tracks[] = {
555 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
559 static const EbmlSyntax matroska_attachment[] = {
560 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
561 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
562 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
563 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
564 { MATROSKA_ID_FILEDESC, EBML_NONE },
568 static const EbmlSyntax matroska_attachments[] = {
569 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
573 static const EbmlSyntax matroska_chapter_display[] = {
574 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
575 { MATROSKA_ID_CHAPLANG, EBML_NONE },
576 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
580 static const EbmlSyntax matroska_chapter_entry[] = {
581 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
582 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
584 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
585 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
586 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
587 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
588 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
592 static const EbmlSyntax matroska_chapter[] = {
593 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
594 { MATROSKA_ID_EDITIONUID, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
601 static const EbmlSyntax matroska_chapters[] = {
602 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
606 static const EbmlSyntax matroska_index_pos[] = {
607 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
608 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
609 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
610 { MATROSKA_ID_CUEDURATION, EBML_NONE },
611 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
615 static const EbmlSyntax matroska_index_entry[] = {
616 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
617 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
621 static const EbmlSyntax matroska_index[] = {
622 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
626 static const EbmlSyntax matroska_simpletag[] = {
627 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
628 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
629 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
630 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
631 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
636 static const EbmlSyntax matroska_tagtargets[] = {
637 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
638 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
639 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
640 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
641 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
645 static const EbmlSyntax matroska_tag[] = {
646 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
647 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
651 static const EbmlSyntax matroska_tags[] = {
652 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
656 static const EbmlSyntax matroska_seekhead_entry[] = {
657 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
658 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
662 static const EbmlSyntax matroska_seekhead[] = {
663 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
667 static const EbmlSyntax matroska_segment[] = {
668 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
669 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
670 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
671 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
672 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
673 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
674 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
675 { MATROSKA_ID_CLUSTER, EBML_STOP },
679 static const EbmlSyntax matroska_segments[] = {
680 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
684 static const EbmlSyntax matroska_blockmore[] = {
685 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
686 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
690 static const EbmlSyntax matroska_blockadditions[] = {
691 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
695 static const EbmlSyntax matroska_blockgroup[] = {
696 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
697 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
698 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
699 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
700 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
701 { MATROSKA_ID_CODECSTATE, EBML_NONE },
702 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706 static const EbmlSyntax matroska_cluster_parsing[] = {
707 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
708 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
709 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
710 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
711 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
712 { MATROSKA_ID_INFO, EBML_NONE },
713 { MATROSKA_ID_CUES, EBML_NONE },
714 { MATROSKA_ID_TAGS, EBML_NONE },
715 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
716 { MATROSKA_ID_CLUSTER, EBML_STOP },
720 static const EbmlSyntax matroska_cluster[] = {
721 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
722 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
723 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
724 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
725 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
729 static const EbmlSyntax matroska_clusters[] = {
730 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
731 { MATROSKA_ID_INFO, EBML_NONE },
732 { MATROSKA_ID_CUES, EBML_NONE },
733 { MATROSKA_ID_TAGS, EBML_NONE },
734 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
738 static const char *const matroska_doctypes[] = { "matroska", "webm" };
740 static int matroska_read_close(AVFormatContext *s);
743 * This function prepares the status for parsing of level 1 elements.
745 static int matroska_reset_status(MatroskaDemuxContext *matroska,
746 uint32_t id, int64_t position)
749 int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
754 matroska->current_id = id;
755 matroska->num_levels = 1;
756 matroska->current_cluster.pos = 0;
761 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
763 AVIOContext *pb = matroska->ctx->pb;
766 /* Try to seek to the last position to resync from. If this doesn't work,
767 * we resync from the earliest position available: The start of the buffer. */
768 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
769 av_log(matroska->ctx, AV_LOG_WARNING,
770 "Seek to desired resync point failed. Seeking to "
771 "earliest point available instead.\n");
772 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
773 last_pos + 1), SEEK_SET);
778 // try to find a toplevel element
779 while (!avio_feof(pb)) {
780 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
781 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
782 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
783 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
784 /* Prepare the context for parsing of a level 1 element. */
785 matroska_reset_status(matroska, id, -1);
786 /* Given that we are here means that an error has occured,
787 * so treat the segment as unknown length in order not to
788 * discard valid data that happens to be beyond the designated
789 * end of the segment. */
790 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
793 id = (id << 8) | avio_r8(pb);
797 return pb->error ? pb->error : AVERROR_EOF;
801 * Return: Whether we reached the end of a level in the hierarchy or not.
803 static int ebml_level_end(MatroskaDemuxContext *matroska)
805 AVIOContext *pb = matroska->ctx->pb;
806 int64_t pos = avio_tell(pb);
808 if (matroska->num_levels > 0) {
809 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
810 if (pos - level->start >= level->length || matroska->current_id) {
811 matroska->num_levels--;
815 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
819 * Read: an "EBML number", which is defined as a variable-length
820 * array of bytes. The first byte indicates the length by giving a
821 * number of 0-bits followed by a one. The position of the first
822 * "one" bit inside the first byte indicates the length of this
824 * Returns: number of bytes read, < 0 on error
826 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
827 int max_size, uint64_t *number, int eof_forbidden)
833 /* The first byte tells us the length in bytes - except when it is zero. */
838 /* get the length of the EBML number */
839 read = 8 - ff_log2_tab[total];
841 if (!total || read > max_size) {
842 pos = avio_tell(pb) - 1;
844 av_log(matroska->ctx, AV_LOG_ERROR,
845 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
846 "of an EBML number\n", pos, pos);
848 av_log(matroska->ctx, AV_LOG_ERROR,
849 "Length %d indicated by an EBML number's first byte 0x%02x "
850 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
851 read, (uint8_t) total, pos, pos, max_size);
853 return AVERROR_INVALIDDATA;
856 /* read out length */
857 total ^= 1 << ff_log2_tab[total];
859 total = (total << 8) | avio_r8(pb);
861 if (pb->eof_reached) {
873 av_log(matroska->ctx, AV_LOG_ERROR,
874 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
879 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
880 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
887 * Read a EBML length value.
888 * This needs special handling for the "unknown length" case which has multiple
891 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
894 int res = ebml_read_num(matroska, pb, 8, number, 1);
895 if (res > 0 && *number + 1 == 1ULL << (7 * res))
896 *number = EBML_UNKNOWN_LENGTH;
901 * Read the next element as an unsigned int.
902 * Returns NEEDS_CHECKING.
904 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
908 /* big-endian ordering; build up number */
911 *num = (*num << 8) | avio_r8(pb);
913 return NEEDS_CHECKING;
917 * Read the next element as a signed int.
918 * Returns NEEDS_CHECKING.
920 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
927 *num = sign_extend(avio_r8(pb), 8);
929 /* big-endian ordering; build up number */
931 *num = ((uint64_t)*num << 8) | avio_r8(pb);
934 return NEEDS_CHECKING;
938 * Read the next element as a float.
939 * Returns NEEDS_CHECKING or < 0 on obvious failure.
941 static int ebml_read_float(AVIOContext *pb, int size, double *num)
946 *num = av_int2float(avio_rb32(pb));
948 *num = av_int2double(avio_rb64(pb));
950 return AVERROR_INVALIDDATA;
952 return NEEDS_CHECKING;
956 * Read the next element as an ASCII string.
957 * 0 is success, < 0 or NEEDS_CHECKING is failure.
959 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
964 /* EBML strings are usually not 0-terminated, so we allocate one
965 * byte more, read the string and NULL-terminate it ourselves. */
966 if (!(res = av_malloc(size + 1)))
967 return AVERROR(ENOMEM);
968 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
970 return ret < 0 ? ret : NEEDS_CHECKING;
980 * Read the next element as binary data.
981 * 0 is success, < 0 or NEEDS_CHECKING is failure.
983 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
987 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
990 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
992 bin->data = bin->buf->data;
994 bin->pos = avio_tell(pb);
995 if ((ret = avio_read(pb, bin->data, length)) != length) {
996 av_buffer_unref(&bin->buf);
999 return ret < 0 ? ret : NEEDS_CHECKING;
1006 * Read the next element, but only the header. The contents
1007 * are supposed to be sub-elements which can be read separately.
1008 * 0 is success, < 0 is failure.
1010 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
1012 AVIOContext *pb = matroska->ctx->pb;
1013 MatroskaLevel *level;
1015 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1016 av_log(matroska->ctx, AV_LOG_ERROR,
1017 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1018 return AVERROR(ENOSYS);
1021 level = &matroska->levels[matroska->num_levels++];
1022 level->start = avio_tell(pb);
1023 level->length = length;
1029 * Read signed/unsigned "EBML" numbers.
1030 * Return: number of bytes processed, < 0 on error
1032 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1033 uint8_t *data, uint32_t size, uint64_t *num)
1036 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1037 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1041 * Same as above, but signed.
1043 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1044 uint8_t *data, uint32_t size, int64_t *num)
1049 /* read as unsigned number first */
1050 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1053 /* make signed (weird way) */
1054 *num = unum - ((1LL << (7 * res - 1)) - 1);
1059 static int ebml_parse(MatroskaDemuxContext *matroska,
1060 EbmlSyntax *syntax, void *data);
1062 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1065 for (i = 0; syntax[i].id; i++)
1066 if (id == syntax[i].id)
1072 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1077 for (i = 0; syntax[i].id; i++)
1078 switch (syntax[i].type) {
1080 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1083 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1086 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1090 // the default may be NULL
1091 if (syntax[i].def.s) {
1092 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1093 *dst = av_strdup(syntax[i].def.s);
1095 return AVERROR(ENOMEM);
1100 while (!res && !ebml_level_end(matroska))
1101 res = ebml_parse(matroska, syntax, data);
1106 static int is_ebml_id_valid(uint32_t id)
1108 // Due to endian nonsense in Matroska, the highest byte with any bits set
1109 // will contain the leading length bit. This bit in turn identifies the
1110 // total byte length of the element by its position within the byte.
1111 unsigned int bits = av_log2(id);
1112 return id && (bits + 7) / 8 == (8 - bits % 8);
1116 * Allocate and return the entry for the level1 element with the given ID. If
1117 * an entry already exists, return the existing entry.
1119 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1123 MatroskaLevel1Element *elem;
1125 if (!is_ebml_id_valid(id))
1128 // Some files link to all clusters; useless.
1129 if (id == MATROSKA_ID_CLUSTER)
1132 // There can be multiple seekheads.
1133 if (id != MATROSKA_ID_SEEKHEAD) {
1134 for (i = 0; i < matroska->num_level1_elems; i++) {
1135 if (matroska->level1_elems[i].id == id)
1136 return &matroska->level1_elems[i];
1140 // Only a completely broken file would have more elements.
1141 // It also provides a low-effort way to escape from circular seekheads
1142 // (every iteration will add a level1 entry).
1143 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1144 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1148 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1149 *elem = (MatroskaLevel1Element){.id = id};
1154 static int ebml_parse(MatroskaDemuxContext *matroska,
1155 EbmlSyntax *syntax, void *data)
1157 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1161 // max. 16 MB for strings
1162 [EBML_STR] = 0x1000000,
1163 [EBML_UTF8] = 0x1000000,
1164 // max. 256 MB for binary data
1165 [EBML_BIN] = 0x10000000,
1166 // no limits for anything else
1168 AVIOContext *pb = matroska->ctx->pb;
1173 MatroskaLevel1Element *level1_elem;
1175 if (!matroska->current_id) {
1177 res = ebml_read_num(matroska, pb, 4, &id, 0);
1179 // in live mode, finish parsing if EOF is reached.
1180 return (matroska->is_live && pb->eof_reached &&
1181 res == AVERROR_EOF) ? 1 : res;
1183 matroska->current_id = id | 1 << 7 * res;
1186 id = matroska->current_id;
1188 syntax = ebml_parse_id(syntax, id);
1189 if (!syntax->id && id == MATROSKA_ID_CLUSTER &&
1190 matroska->num_levels > 0 &&
1191 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1192 return 0; // we reached the end of an unknown size cluster
1193 if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1194 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1197 data = (char *) data + syntax->data_offset;
1198 if (syntax->list_elem_size) {
1199 EbmlList *list = data;
1200 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1202 return AVERROR(ENOMEM);
1203 list->elem = newelem;
1204 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1205 memset(data, 0, syntax->list_elem_size);
1209 if (syntax->type != EBML_STOP) {
1210 matroska->current_id = 0;
1211 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1213 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1214 av_log(matroska->ctx, AV_LOG_ERROR,
1215 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1216 length, max_lengths[syntax->type], syntax->type);
1217 return AVERROR_INVALIDDATA;
1219 if (matroska->num_levels > 0) {
1220 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1221 AVIOContext *pb = matroska->ctx->pb;
1222 int64_t pos = avio_tell(pb);
1224 if (length != EBML_UNKNOWN_LENGTH &&
1225 level->length != EBML_UNKNOWN_LENGTH) {
1226 uint64_t elem_end = pos + length,
1227 level_end = level->start + level->length;
1229 if (level_end < elem_end) {
1230 av_log(matroska->ctx, AV_LOG_ERROR,
1231 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1232 "containing master element ending at 0x%"PRIx64"\n",
1233 pos, elem_end, level_end);
1234 return AVERROR_INVALIDDATA;
1236 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1237 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1238 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1239 return AVERROR_INVALIDDATA;
1240 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1241 // According to the specifications only clusters and segments
1242 // are allowed to be unknown-sized.
1243 av_log(matroska->ctx, AV_LOG_ERROR,
1244 "Found unknown-sized element other than a cluster at "
1245 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1246 return AVERROR_INVALIDDATA;
1251 switch (syntax->type) {
1253 res = ebml_read_uint(pb, length, data);
1256 res = ebml_read_sint(pb, length, data);
1259 res = ebml_read_float(pb, length, data);
1263 res = ebml_read_ascii(pb, length, data);
1266 res = ebml_read_binary(pb, length, data);
1270 if ((res = ebml_read_master(matroska, length)) < 0)
1272 if (id == MATROSKA_ID_SEGMENT)
1273 matroska->segment_start = avio_tell(matroska->ctx->pb);
1274 if (id == MATROSKA_ID_CUES)
1275 matroska->cues_parsing_deferred = 0;
1276 if (syntax->type == EBML_LEVEL1 &&
1277 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1278 if (level1_elem->parsed)
1279 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1280 level1_elem->parsed = 1;
1282 return ebml_parse_nest(matroska, syntax->def.n, data);
1288 if (ffio_limit(pb, length) != length) {
1289 // ffio_limit emits its own error message,
1290 // so we don't have to.
1291 return AVERROR(EIO);
1293 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1294 // avio_skip might take us past EOF. We check for this
1295 // by skipping only length - 1 bytes, reading a byte and
1296 // checking the error flags. This is done in order to check
1297 // that the element has been properly skipped even when
1298 // no filesize (that ffio_limit relies on) is available.
1300 res = NEEDS_CHECKING;
1307 if (res == NEEDS_CHECKING) {
1308 if (pb->eof_reached) {
1317 if (res == AVERROR_INVALIDDATA)
1318 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1319 else if (res == AVERROR(EIO))
1320 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1321 else if (res == AVERROR_EOF) {
1322 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1329 static void ebml_free(EbmlSyntax *syntax, void *data)
1332 for (i = 0; syntax[i].id; i++) {
1333 void *data_off = (char *) data + syntax[i].data_offset;
1334 switch (syntax[i].type) {
1340 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1344 if (syntax[i].list_elem_size) {
1345 EbmlList *list = data_off;
1346 char *ptr = list->elem;
1347 for (j = 0; j < list->nb_elem;
1348 j++, ptr += syntax[i].list_elem_size)
1349 ebml_free(syntax[i].def.n, ptr);
1350 av_freep(&list->elem);
1353 ebml_free(syntax[i].def.n, data_off);
1363 static int matroska_probe(const AVProbeData *p)
1366 int len_mask = 0x80, size = 1, n = 1, i;
1369 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1372 /* length of header */
1374 while (size <= 8 && !(total & len_mask)) {
1380 total &= (len_mask - 1);
1382 total = (total << 8) | p->buf[4 + n++];
1384 /* Does the probe data contain the whole header? */
1385 if (p->buf_size < 4 + size + total)
1388 /* The header should contain a known document type. For now,
1389 * we don't parse the whole header but simply check for the
1390 * availability of that array of characters inside the header.
1391 * Not fully fool-proof, but good enough. */
1392 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1393 size_t probelen = strlen(matroska_doctypes[i]);
1394 if (total < probelen)
1396 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1397 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1398 return AVPROBE_SCORE_MAX;
1401 // probably valid EBML header but no recognized doctype
1402 return AVPROBE_SCORE_EXTENSION;
1405 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1408 MatroskaTrack *tracks = matroska->tracks.elem;
1411 for (i = 0; i < matroska->tracks.nb_elem; i++)
1412 if (tracks[i].num == num)
1415 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1419 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1420 MatroskaTrack *track)
1422 MatroskaTrackEncoding *encodings = track->encodings.elem;
1423 uint8_t *data = *buf;
1424 int isize = *buf_size;
1425 uint8_t *pkt_data = NULL;
1426 uint8_t av_unused *newpktdata;
1427 int pkt_size = isize;
1431 if (pkt_size >= 10000000U)
1432 return AVERROR_INVALIDDATA;
1434 switch (encodings[0].compression.algo) {
1435 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1437 int header_size = encodings[0].compression.settings.size;
1438 uint8_t *header = encodings[0].compression.settings.data;
1440 if (header_size && !header) {
1441 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1448 pkt_size = isize + header_size;
1449 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1451 return AVERROR(ENOMEM);
1453 memcpy(pkt_data, header, header_size);
1454 memcpy(pkt_data + header_size, data, isize);
1458 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1460 olen = pkt_size *= 3;
1461 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1462 + AV_INPUT_BUFFER_PADDING_SIZE);
1464 result = AVERROR(ENOMEM);
1467 pkt_data = newpktdata;
1468 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1469 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1471 result = AVERROR_INVALIDDATA;
1478 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1480 z_stream zstream = { 0 };
1481 if (inflateInit(&zstream) != Z_OK)
1483 zstream.next_in = data;
1484 zstream.avail_in = isize;
1487 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1489 inflateEnd(&zstream);
1490 result = AVERROR(ENOMEM);
1493 pkt_data = newpktdata;
1494 zstream.avail_out = pkt_size - zstream.total_out;
1495 zstream.next_out = pkt_data + zstream.total_out;
1496 result = inflate(&zstream, Z_NO_FLUSH);
1497 } while (result == Z_OK && pkt_size < 10000000);
1498 pkt_size = zstream.total_out;
1499 inflateEnd(&zstream);
1500 if (result != Z_STREAM_END) {
1501 if (result == Z_MEM_ERROR)
1502 result = AVERROR(ENOMEM);
1504 result = AVERROR_INVALIDDATA;
1511 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1513 bz_stream bzstream = { 0 };
1514 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1516 bzstream.next_in = data;
1517 bzstream.avail_in = isize;
1520 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1522 BZ2_bzDecompressEnd(&bzstream);
1523 result = AVERROR(ENOMEM);
1526 pkt_data = newpktdata;
1527 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1528 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1529 result = BZ2_bzDecompress(&bzstream);
1530 } while (result == BZ_OK && pkt_size < 10000000);
1531 pkt_size = bzstream.total_out_lo32;
1532 BZ2_bzDecompressEnd(&bzstream);
1533 if (result != BZ_STREAM_END) {
1534 if (result == BZ_MEM_ERROR)
1535 result = AVERROR(ENOMEM);
1537 result = AVERROR_INVALIDDATA;
1544 return AVERROR_INVALIDDATA;
1547 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1550 *buf_size = pkt_size;
1558 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1559 AVDictionary **metadata, char *prefix)
1561 MatroskaTag *tags = list->elem;
1565 for (i = 0; i < list->nb_elem; i++) {
1566 const char *lang = tags[i].lang &&
1567 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1569 if (!tags[i].name) {
1570 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1574 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1576 av_strlcpy(key, tags[i].name, sizeof(key));
1577 if (tags[i].def || !lang) {
1578 av_dict_set(metadata, key, tags[i].string, 0);
1579 if (tags[i].sub.nb_elem)
1580 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1583 av_strlcat(key, "-", sizeof(key));
1584 av_strlcat(key, lang, sizeof(key));
1585 av_dict_set(metadata, key, tags[i].string, 0);
1586 if (tags[i].sub.nb_elem)
1587 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1590 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1593 static void matroska_convert_tags(AVFormatContext *s)
1595 MatroskaDemuxContext *matroska = s->priv_data;
1596 MatroskaTags *tags = matroska->tags.elem;
1599 for (i = 0; i < matroska->tags.nb_elem; i++) {
1600 if (tags[i].target.attachuid) {
1601 MatroskaAttachment *attachment = matroska->attachments.elem;
1603 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1604 if (attachment[j].uid == tags[i].target.attachuid &&
1605 attachment[j].stream) {
1606 matroska_convert_tag(s, &tags[i].tag,
1607 &attachment[j].stream->metadata, NULL);
1612 av_log(NULL, AV_LOG_WARNING,
1613 "The tags at index %d refer to a "
1614 "non-existent attachment %"PRId64".\n",
1615 i, tags[i].target.attachuid);
1617 } else if (tags[i].target.chapteruid) {
1618 MatroskaChapter *chapter = matroska->chapters.elem;
1620 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1621 if (chapter[j].uid == tags[i].target.chapteruid &&
1622 chapter[j].chapter) {
1623 matroska_convert_tag(s, &tags[i].tag,
1624 &chapter[j].chapter->metadata, NULL);
1629 av_log(NULL, AV_LOG_WARNING,
1630 "The tags at index %d refer to a non-existent chapter "
1632 i, tags[i].target.chapteruid);
1634 } else if (tags[i].target.trackuid) {
1635 MatroskaTrack *track = matroska->tracks.elem;
1637 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1638 if (track[j].uid == tags[i].target.trackuid &&
1640 matroska_convert_tag(s, &tags[i].tag,
1641 &track[j].stream->metadata, NULL);
1646 av_log(NULL, AV_LOG_WARNING,
1647 "The tags at index %d refer to a non-existent track "
1649 i, tags[i].target.trackuid);
1652 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1653 tags[i].target.type);
1658 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1661 uint32_t saved_id = matroska->current_id;
1662 int64_t before_pos = avio_tell(matroska->ctx->pb);
1663 MatroskaLevel level;
1668 offset = pos + matroska->segment_start;
1669 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1670 /* We don't want to lose our seekhead level, so we add
1671 * a dummy. This is a crude hack. */
1672 if (matroska->num_levels == EBML_MAX_DEPTH) {
1673 av_log(matroska->ctx, AV_LOG_INFO,
1674 "Max EBML element depth (%d) reached, "
1675 "cannot parse further.\n", EBML_MAX_DEPTH);
1676 ret = AVERROR_INVALIDDATA;
1679 level.length = EBML_UNKNOWN_LENGTH;
1680 matroska->levels[matroska->num_levels] = level;
1681 matroska->num_levels++;
1682 matroska->current_id = 0;
1684 ret = ebml_parse(matroska, matroska_segment, matroska);
1687 /* Seek back - notice that in all instances where this is used it is safe
1688 * to set the level to 1 and unset the position of the current cluster. */
1689 matroska_reset_status(matroska, saved_id, before_pos);
1694 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1696 EbmlList *seekhead_list = &matroska->seekhead;
1699 // we should not do any seeking in the streaming case
1700 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1703 for (i = 0; i < seekhead_list->nb_elem; i++) {
1704 MatroskaSeekhead *seekheads = seekhead_list->elem;
1705 uint32_t id = seekheads[i].id;
1706 uint64_t pos = seekheads[i].pos;
1708 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1709 if (!elem || elem->parsed)
1714 // defer cues parsing until we actually need cue data.
1715 if (id == MATROSKA_ID_CUES)
1718 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1719 // mark index as broken
1720 matroska->cues_parsing_deferred = -1;
1728 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1730 EbmlList *index_list;
1731 MatroskaIndex *index;
1732 uint64_t index_scale = 1;
1735 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1738 index_list = &matroska->index;
1739 index = index_list->elem;
1740 if (index_list->nb_elem < 2)
1742 if (index[1].time > 1E14 / matroska->time_scale) {
1743 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1746 for (i = 0; i < index_list->nb_elem; i++) {
1747 EbmlList *pos_list = &index[i].pos;
1748 MatroskaIndexPos *pos = pos_list->elem;
1749 for (j = 0; j < pos_list->nb_elem; j++) {
1750 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1752 if (track && track->stream)
1753 av_add_index_entry(track->stream,
1754 pos[j].pos + matroska->segment_start,
1755 index[i].time / index_scale, 0, 0,
1761 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1764 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1767 for (i = 0; i < matroska->num_level1_elems; i++) {
1768 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1769 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1770 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1771 matroska->cues_parsing_deferred = -1;
1777 matroska_add_index_entries(matroska);
1780 static int matroska_aac_profile(char *codec_id)
1782 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1785 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1786 if (strstr(codec_id, aac_profiles[profile]))
1791 static int matroska_aac_sri(int samplerate)
1795 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1796 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1801 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1803 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1804 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1807 static int matroska_parse_flac(AVFormatContext *s,
1808 MatroskaTrack *track,
1811 AVStream *st = track->stream;
1812 uint8_t *p = track->codec_priv.data;
1813 int size = track->codec_priv.size;
1815 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1816 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1817 track->codec_priv.size = 0;
1821 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1823 p += track->codec_priv.size;
1824 size -= track->codec_priv.size;
1826 /* parse the remaining metadata blocks if present */
1828 int block_last, block_type, block_size;
1830 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1834 if (block_size > size)
1837 /* check for the channel mask */
1838 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1839 AVDictionary *dict = NULL;
1840 AVDictionaryEntry *chmask;
1842 ff_vorbis_comment(s, &dict, p, block_size, 0);
1843 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1845 uint64_t mask = strtol(chmask->value, NULL, 0);
1846 if (!mask || mask & ~0x3ffffULL) {
1847 av_log(s, AV_LOG_WARNING,
1848 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1850 st->codecpar->channel_layout = mask;
1852 av_dict_free(&dict);
1862 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1864 int major, minor, micro, bttb = 0;
1866 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1867 * this function, and fixed in 57.52 */
1868 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1869 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1871 switch (field_order) {
1872 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1873 return AV_FIELD_PROGRESSIVE;
1874 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1875 return AV_FIELD_UNKNOWN;
1876 case MATROSKA_VIDEO_FIELDORDER_TT:
1878 case MATROSKA_VIDEO_FIELDORDER_BB:
1880 case MATROSKA_VIDEO_FIELDORDER_BT:
1881 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1882 case MATROSKA_VIDEO_FIELDORDER_TB:
1883 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1885 return AV_FIELD_UNKNOWN;
1889 static void mkv_stereo_mode_display_mul(int stereo_mode,
1890 int *h_width, int *h_height)
1892 switch (stereo_mode) {
1893 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1894 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1895 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1896 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1897 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1899 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1900 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1901 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1902 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1905 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1906 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1907 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1908 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1914 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1915 const MatroskaTrackVideoColor *color = track->video.color.elem;
1916 const MatroskaMasteringMeta *mastering_meta;
1917 int has_mastering_primaries, has_mastering_luminance;
1919 if (!track->video.color.nb_elem)
1922 mastering_meta = &color->mastering_meta;
1923 // Mastering primaries are CIE 1931 coords, and must be > 0.
1924 has_mastering_primaries =
1925 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1926 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1927 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1928 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1929 has_mastering_luminance = mastering_meta->max_luminance > 0;
1931 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1932 st->codecpar->color_space = color->matrix_coefficients;
1933 if (color->primaries != AVCOL_PRI_RESERVED &&
1934 color->primaries != AVCOL_PRI_RESERVED0)
1935 st->codecpar->color_primaries = color->primaries;
1936 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1937 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1938 st->codecpar->color_trc = color->transfer_characteristics;
1939 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1940 color->range <= AVCOL_RANGE_JPEG)
1941 st->codecpar->color_range = color->range;
1942 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1943 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1944 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1945 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1946 st->codecpar->chroma_location =
1947 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1948 (color->chroma_siting_vert - 1) << 7);
1950 if (color->max_cll && color->max_fall) {
1953 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1955 return AVERROR(ENOMEM);
1956 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1957 (uint8_t *)metadata, size);
1959 av_freep(&metadata);
1962 metadata->MaxCLL = color->max_cll;
1963 metadata->MaxFALL = color->max_fall;
1966 if (has_mastering_primaries || has_mastering_luminance) {
1967 // Use similar rationals as other standards.
1968 const int chroma_den = 50000;
1969 const int luma_den = 10000;
1970 AVMasteringDisplayMetadata *metadata =
1971 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1972 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1973 sizeof(AVMasteringDisplayMetadata));
1975 return AVERROR(ENOMEM);
1977 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1978 if (has_mastering_primaries) {
1979 metadata->display_primaries[0][0] = av_make_q(
1980 round(mastering_meta->r_x * chroma_den), chroma_den);
1981 metadata->display_primaries[0][1] = av_make_q(
1982 round(mastering_meta->r_y * chroma_den), chroma_den);
1983 metadata->display_primaries[1][0] = av_make_q(
1984 round(mastering_meta->g_x * chroma_den), chroma_den);
1985 metadata->display_primaries[1][1] = av_make_q(
1986 round(mastering_meta->g_y * chroma_den), chroma_den);
1987 metadata->display_primaries[2][0] = av_make_q(
1988 round(mastering_meta->b_x * chroma_den), chroma_den);
1989 metadata->display_primaries[2][1] = av_make_q(
1990 round(mastering_meta->b_y * chroma_den), chroma_den);
1991 metadata->white_point[0] = av_make_q(
1992 round(mastering_meta->white_x * chroma_den), chroma_den);
1993 metadata->white_point[1] = av_make_q(
1994 round(mastering_meta->white_y * chroma_den), chroma_den);
1995 metadata->has_primaries = 1;
1997 if (has_mastering_luminance) {
1998 metadata->max_luminance = av_make_q(
1999 round(mastering_meta->max_luminance * luma_den), luma_den);
2000 metadata->min_luminance = av_make_q(
2001 round(mastering_meta->min_luminance * luma_den), luma_den);
2002 metadata->has_luminance = 1;
2008 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2009 AVSphericalMapping *spherical;
2010 enum AVSphericalProjection projection;
2011 size_t spherical_size;
2012 uint32_t l = 0, t = 0, r = 0, b = 0;
2013 uint32_t padding = 0;
2017 bytestream2_init(&gb, track->video.projection.private.data,
2018 track->video.projection.private.size);
2020 if (bytestream2_get_byte(&gb) != 0) {
2021 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2025 bytestream2_skip(&gb, 3); // flags
2027 switch (track->video.projection.type) {
2028 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2029 if (track->video.projection.private.size == 20) {
2030 t = bytestream2_get_be32(&gb);
2031 b = bytestream2_get_be32(&gb);
2032 l = bytestream2_get_be32(&gb);
2033 r = bytestream2_get_be32(&gb);
2035 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2036 av_log(NULL, AV_LOG_ERROR,
2037 "Invalid bounding rectangle coordinates "
2038 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2040 return AVERROR_INVALIDDATA;
2042 } else if (track->video.projection.private.size != 0) {
2043 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2044 return AVERROR_INVALIDDATA;
2047 if (l || t || r || b)
2048 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2050 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2052 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2053 if (track->video.projection.private.size < 4) {
2054 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2055 return AVERROR_INVALIDDATA;
2056 } else if (track->video.projection.private.size == 12) {
2057 uint32_t layout = bytestream2_get_be32(&gb);
2059 av_log(NULL, AV_LOG_WARNING,
2060 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2063 projection = AV_SPHERICAL_CUBEMAP;
2064 padding = bytestream2_get_be32(&gb);
2066 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2067 return AVERROR_INVALIDDATA;
2070 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2071 /* No Spherical metadata */
2074 av_log(NULL, AV_LOG_WARNING,
2075 "Unknown spherical metadata type %"PRIu64"\n",
2076 track->video.projection.type);
2080 spherical = av_spherical_alloc(&spherical_size);
2082 return AVERROR(ENOMEM);
2084 spherical->projection = projection;
2086 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2087 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2088 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2090 spherical->padding = padding;
2092 spherical->bound_left = l;
2093 spherical->bound_top = t;
2094 spherical->bound_right = r;
2095 spherical->bound_bottom = b;
2097 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2100 av_freep(&spherical);
2107 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2109 const AVCodecTag *codec_tags;
2111 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2112 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2114 /* Normalize noncompliant private data that starts with the fourcc
2115 * by expanding/shifting the data by 4 bytes and storing the data
2116 * size at the start. */
2117 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2118 int ret = av_buffer_realloc(&track->codec_priv.buf,
2119 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2123 track->codec_priv.data = track->codec_priv.buf->data;
2124 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2125 track->codec_priv.size += 4;
2126 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2129 *fourcc = AV_RL32(track->codec_priv.data + 4);
2130 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2135 static int matroska_parse_tracks(AVFormatContext *s)
2137 MatroskaDemuxContext *matroska = s->priv_data;
2138 MatroskaTrack *tracks = matroska->tracks.elem;
2143 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2144 MatroskaTrack *track = &tracks[i];
2145 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2146 EbmlList *encodings_list = &track->encodings;
2147 MatroskaTrackEncoding *encodings = encodings_list->elem;
2148 uint8_t *extradata = NULL;
2149 int extradata_size = 0;
2150 int extradata_offset = 0;
2151 uint32_t fourcc = 0;
2153 char* key_id_base64 = NULL;
2156 /* Apply some sanity checks. */
2157 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2158 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2159 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2160 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2161 av_log(matroska->ctx, AV_LOG_INFO,
2162 "Unknown or unsupported track type %"PRIu64"\n",
2166 if (!track->codec_id)
2169 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2170 isnan(track->audio.samplerate)) {
2171 av_log(matroska->ctx, AV_LOG_WARNING,
2172 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2173 track->audio.samplerate);
2174 track->audio.samplerate = 8000;
2177 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2178 if (!track->default_duration && track->video.frame_rate > 0) {
2179 double default_duration = 1000000000 / track->video.frame_rate;
2180 if (default_duration > UINT64_MAX || default_duration < 0) {
2181 av_log(matroska->ctx, AV_LOG_WARNING,
2182 "Invalid frame rate %e. Cannot calculate default duration.\n",
2183 track->video.frame_rate);
2185 track->default_duration = default_duration;
2188 if (track->video.display_width == -1)
2189 track->video.display_width = track->video.pixel_width;
2190 if (track->video.display_height == -1)
2191 track->video.display_height = track->video.pixel_height;
2192 if (track->video.color_space.size == 4)
2193 fourcc = AV_RL32(track->video.color_space.data);
2194 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2195 if (!track->audio.out_samplerate)
2196 track->audio.out_samplerate = track->audio.samplerate;
2198 if (encodings_list->nb_elem > 1) {
2199 av_log(matroska->ctx, AV_LOG_ERROR,
2200 "Multiple combined encodings not supported");
2201 } else if (encodings_list->nb_elem == 1) {
2202 if (encodings[0].type) {
2203 if (encodings[0].encryption.key_id.size > 0) {
2204 /* Save the encryption key id to be stored later as a
2206 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2207 key_id_base64 = av_malloc(b64_size);
2208 if (key_id_base64 == NULL)
2209 return AVERROR(ENOMEM);
2211 av_base64_encode(key_id_base64, b64_size,
2212 encodings[0].encryption.key_id.data,
2213 encodings[0].encryption.key_id.size);
2215 encodings[0].scope = 0;
2216 av_log(matroska->ctx, AV_LOG_ERROR,
2217 "Unsupported encoding type");
2221 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2224 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2227 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2229 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2230 encodings[0].scope = 0;
2231 av_log(matroska->ctx, AV_LOG_ERROR,
2232 "Unsupported encoding type");
2233 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2234 uint8_t *codec_priv = track->codec_priv.data;
2235 int ret = matroska_decode_buffer(&track->codec_priv.data,
2236 &track->codec_priv.size,
2239 track->codec_priv.data = NULL;
2240 track->codec_priv.size = 0;
2241 av_log(matroska->ctx, AV_LOG_ERROR,
2242 "Failed to decode codec private data\n");
2245 if (codec_priv != track->codec_priv.data) {
2246 av_buffer_unref(&track->codec_priv.buf);
2247 if (track->codec_priv.data) {
2248 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2249 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2251 if (!track->codec_priv.buf) {
2252 av_freep(&track->codec_priv.data);
2253 track->codec_priv.size = 0;
2254 return AVERROR(ENOMEM);
2261 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2262 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2263 strlen(ff_mkv_codec_tags[j].str))) {
2264 codec_id = ff_mkv_codec_tags[j].id;
2269 st = track->stream = avformat_new_stream(s, NULL);
2271 av_free(key_id_base64);
2272 return AVERROR(ENOMEM);
2275 if (key_id_base64) {
2276 /* export encryption key id as base64 metadata tag */
2277 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2278 av_freep(&key_id_base64);
2281 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2282 track->codec_priv.size >= 40 &&
2283 track->codec_priv.data) {
2284 track->ms_compat = 1;
2285 bit_depth = AV_RL16(track->codec_priv.data + 14);
2286 fourcc = AV_RL32(track->codec_priv.data + 16);
2287 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2290 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2292 extradata_offset = 40;
2293 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2294 track->codec_priv.size >= 14 &&
2295 track->codec_priv.data) {
2297 ffio_init_context(&b, track->codec_priv.data,
2298 track->codec_priv.size,
2299 0, NULL, NULL, NULL, NULL);
2300 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2303 codec_id = st->codecpar->codec_id;
2304 fourcc = st->codecpar->codec_tag;
2305 extradata_offset = FFMIN(track->codec_priv.size, 18);
2306 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2307 /* Normally 36, but allow noncompliant private data */
2308 && (track->codec_priv.size >= 32)
2309 && (track->codec_priv.data)) {
2310 uint16_t sample_size;
2311 int ret = get_qt_codec(track, &fourcc, &codec_id);
2314 sample_size = AV_RB16(track->codec_priv.data + 26);
2316 if (sample_size == 8) {
2317 fourcc = MKTAG('r','a','w',' ');
2318 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2319 } else if (sample_size == 16) {
2320 fourcc = MKTAG('t','w','o','s');
2321 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2324 if ((fourcc == MKTAG('t','w','o','s') ||
2325 fourcc == MKTAG('s','o','w','t')) &&
2327 codec_id = AV_CODEC_ID_PCM_S8;
2328 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2329 (track->codec_priv.size >= 21) &&
2330 (track->codec_priv.data)) {
2331 int ret = get_qt_codec(track, &fourcc, &codec_id);
2334 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2335 fourcc = MKTAG('S','V','Q','3');
2336 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2338 if (codec_id == AV_CODEC_ID_NONE)
2339 av_log(matroska->ctx, AV_LOG_ERROR,
2340 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2341 if (track->codec_priv.size >= 86) {
2342 bit_depth = AV_RB16(track->codec_priv.data + 82);
2343 ffio_init_context(&b, track->codec_priv.data,
2344 track->codec_priv.size,
2345 0, NULL, NULL, NULL, NULL);
2346 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2348 track->has_palette = 1;
2351 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2352 switch (track->audio.bitdepth) {
2354 codec_id = AV_CODEC_ID_PCM_U8;
2357 codec_id = AV_CODEC_ID_PCM_S24BE;
2360 codec_id = AV_CODEC_ID_PCM_S32BE;
2363 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2364 switch (track->audio.bitdepth) {
2366 codec_id = AV_CODEC_ID_PCM_U8;
2369 codec_id = AV_CODEC_ID_PCM_S24LE;
2372 codec_id = AV_CODEC_ID_PCM_S32LE;
2375 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2376 track->audio.bitdepth == 64) {
2377 codec_id = AV_CODEC_ID_PCM_F64LE;
2378 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2379 int profile = matroska_aac_profile(track->codec_id);
2380 int sri = matroska_aac_sri(track->audio.samplerate);
2381 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2383 return AVERROR(ENOMEM);
2384 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2385 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2386 if (strstr(track->codec_id, "SBR")) {
2387 sri = matroska_aac_sri(track->audio.out_samplerate);
2388 extradata[2] = 0x56;
2389 extradata[3] = 0xE5;
2390 extradata[4] = 0x80 | (sri << 3);
2394 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2395 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2396 * Create the "atom size", "tag", and "tag version" fields the
2397 * decoder expects manually. */
2398 extradata_size = 12 + track->codec_priv.size;
2399 extradata = av_mallocz(extradata_size +
2400 AV_INPUT_BUFFER_PADDING_SIZE);
2402 return AVERROR(ENOMEM);
2403 AV_WB32(extradata, extradata_size);
2404 memcpy(&extradata[4], "alac", 4);
2405 AV_WB32(&extradata[8], 0);
2406 memcpy(&extradata[12], track->codec_priv.data,
2407 track->codec_priv.size);
2408 } else if (codec_id == AV_CODEC_ID_TTA) {
2409 extradata_size = 30;
2410 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2412 return AVERROR(ENOMEM);
2413 ffio_init_context(&b, extradata, extradata_size, 1,
2414 NULL, NULL, NULL, NULL);
2415 avio_write(&b, "TTA1", 4);
2417 if (track->audio.channels > UINT16_MAX ||
2418 track->audio.bitdepth > UINT16_MAX) {
2419 av_log(matroska->ctx, AV_LOG_WARNING,
2420 "Too large audio channel number %"PRIu64
2421 " or bitdepth %"PRIu64". Skipping track.\n",
2422 track->audio.channels, track->audio.bitdepth);
2423 av_freep(&extradata);
2424 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2425 return AVERROR_INVALIDDATA;
2429 avio_wl16(&b, track->audio.channels);
2430 avio_wl16(&b, track->audio.bitdepth);
2431 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2432 return AVERROR_INVALIDDATA;
2433 avio_wl32(&b, track->audio.out_samplerate);
2434 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2435 track->audio.out_samplerate,
2436 AV_TIME_BASE * 1000));
2437 } else if (codec_id == AV_CODEC_ID_RV10 ||
2438 codec_id == AV_CODEC_ID_RV20 ||
2439 codec_id == AV_CODEC_ID_RV30 ||
2440 codec_id == AV_CODEC_ID_RV40) {
2441 extradata_offset = 26;
2442 } else if (codec_id == AV_CODEC_ID_RA_144) {
2443 track->audio.out_samplerate = 8000;
2444 track->audio.channels = 1;
2445 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2446 codec_id == AV_CODEC_ID_COOK ||
2447 codec_id == AV_CODEC_ID_ATRAC3 ||
2448 codec_id == AV_CODEC_ID_SIPR)
2449 && track->codec_priv.data) {
2452 ffio_init_context(&b, track->codec_priv.data,
2453 track->codec_priv.size,
2454 0, NULL, NULL, NULL, NULL);
2456 flavor = avio_rb16(&b);
2457 track->audio.coded_framesize = avio_rb32(&b);
2459 track->audio.sub_packet_h = avio_rb16(&b);
2460 track->audio.frame_size = avio_rb16(&b);
2461 track->audio.sub_packet_size = avio_rb16(&b);
2463 track->audio.coded_framesize <= 0 ||
2464 track->audio.sub_packet_h <= 0 ||
2465 track->audio.frame_size <= 0 ||
2466 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2467 return AVERROR_INVALIDDATA;
2468 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2469 track->audio.frame_size);
2470 if (!track->audio.buf)
2471 return AVERROR(ENOMEM);
2472 if (codec_id == AV_CODEC_ID_RA_288) {
2473 st->codecpar->block_align = track->audio.coded_framesize;
2474 track->codec_priv.size = 0;
2476 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2477 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2478 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2479 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2481 st->codecpar->block_align = track->audio.sub_packet_size;
2482 extradata_offset = 78;
2484 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2485 ret = matroska_parse_flac(s, track, &extradata_offset);
2488 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2489 fourcc = AV_RL32(track->codec_priv.data);
2490 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2491 /* we don't need any value stored in CodecPrivate.
2492 make sure that it's not exported as extradata. */
2493 track->codec_priv.size = 0;
2494 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2495 /* For now, propagate only the OBUs, if any. Once libavcodec is
2496 updated to handle isobmff style extradata this can be removed. */
2497 extradata_offset = 4;
2499 track->codec_priv.size -= extradata_offset;
2501 if (codec_id == AV_CODEC_ID_NONE)
2502 av_log(matroska->ctx, AV_LOG_INFO,
2503 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2505 if (track->time_scale < 0.01)
2506 track->time_scale = 1.0;
2507 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2508 1000 * 1000 * 1000); /* 64 bit pts in ns */
2510 /* convert the delay from ns to the track timebase */
2511 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2512 (AVRational){ 1, 1000000000 },
2515 st->codecpar->codec_id = codec_id;
2517 if (strcmp(track->language, "und"))
2518 av_dict_set(&st->metadata, "language", track->language, 0);
2519 av_dict_set(&st->metadata, "title", track->name, 0);
2521 if (track->flag_default)
2522 st->disposition |= AV_DISPOSITION_DEFAULT;
2523 if (track->flag_forced)
2524 st->disposition |= AV_DISPOSITION_FORCED;
2526 if (!st->codecpar->extradata) {
2528 st->codecpar->extradata = extradata;
2529 st->codecpar->extradata_size = extradata_size;
2530 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2531 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2532 return AVERROR(ENOMEM);
2533 memcpy(st->codecpar->extradata,
2534 track->codec_priv.data + extradata_offset,
2535 track->codec_priv.size);
2539 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2540 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2541 int display_width_mul = 1;
2542 int display_height_mul = 1;
2544 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2545 st->codecpar->codec_tag = fourcc;
2547 st->codecpar->bits_per_coded_sample = bit_depth;
2548 st->codecpar->width = track->video.pixel_width;
2549 st->codecpar->height = track->video.pixel_height;
2551 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2552 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2553 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2554 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2556 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2557 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2559 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2560 av_reduce(&st->sample_aspect_ratio.num,
2561 &st->sample_aspect_ratio.den,
2562 st->codecpar->height * track->video.display_width * display_width_mul,
2563 st->codecpar->width * track->video.display_height * display_height_mul,
2566 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2567 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2569 if (track->default_duration) {
2570 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2571 1000000000, track->default_duration, 30000);
2572 #if FF_API_R_FRAME_RATE
2573 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2574 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2575 st->r_frame_rate = st->avg_frame_rate;
2579 /* export stereo mode flag as metadata tag */
2580 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2581 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2583 /* export alpha mode flag as metadata tag */
2584 if (track->video.alpha_mode)
2585 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2587 /* if we have virtual track, mark the real tracks */
2588 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2590 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2592 snprintf(buf, sizeof(buf), "%s_%d",
2593 ff_matroska_video_stereo_plane[planes[j].type], i);
2594 for (k=0; k < matroska->tracks.nb_elem; k++)
2595 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2596 av_dict_set(&tracks[k].stream->metadata,
2597 "stereo_mode", buf, 0);
2601 // add stream level stereo3d side data if it is a supported format
2602 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2603 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2604 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2609 ret = mkv_parse_video_color(st, track);
2612 ret = mkv_parse_video_projection(st, track);
2615 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2616 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2617 st->codecpar->codec_tag = fourcc;
2618 st->codecpar->sample_rate = track->audio.out_samplerate;
2619 st->codecpar->channels = track->audio.channels;
2620 if (!st->codecpar->bits_per_coded_sample)
2621 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2622 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2623 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2624 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2625 st->need_parsing = AVSTREAM_PARSE_FULL;
2626 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2627 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2628 if (track->codec_delay > 0) {
2629 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2630 (AVRational){1, 1000000000},
2631 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2632 48000 : st->codecpar->sample_rate});
2634 if (track->seek_preroll > 0) {
2635 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2636 (AVRational){1, 1000000000},
2637 (AVRational){1, st->codecpar->sample_rate});
2639 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2640 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2642 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2643 st->disposition |= AV_DISPOSITION_CAPTIONS;
2644 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2645 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2646 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2647 st->disposition |= AV_DISPOSITION_METADATA;
2649 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2650 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2657 static int matroska_read_header(AVFormatContext *s)
2659 MatroskaDemuxContext *matroska = s->priv_data;
2660 EbmlList *attachments_list = &matroska->attachments;
2661 EbmlList *chapters_list = &matroska->chapters;
2662 MatroskaAttachment *attachments;
2663 MatroskaChapter *chapters;
2664 uint64_t max_start = 0;
2670 matroska->cues_parsing_deferred = 1;
2672 /* First read the EBML header. */
2673 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2674 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2675 ebml_free(ebml_syntax, &ebml);
2676 return AVERROR_INVALIDDATA;
2678 if (ebml.version > EBML_VERSION ||
2679 ebml.max_size > sizeof(uint64_t) ||
2680 ebml.id_length > sizeof(uint32_t) ||
2681 ebml.doctype_version > 3) {
2682 avpriv_report_missing_feature(matroska->ctx,
2683 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2684 ebml.version, ebml.doctype, ebml.doctype_version);
2685 ebml_free(ebml_syntax, &ebml);
2686 return AVERROR_PATCHWELCOME;
2687 } else if (ebml.doctype_version == 3) {
2688 av_log(matroska->ctx, AV_LOG_WARNING,
2689 "EBML header using unsupported features\n"
2690 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2691 ebml.version, ebml.doctype, ebml.doctype_version);
2693 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2694 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2696 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2697 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2698 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2699 ebml_free(ebml_syntax, &ebml);
2700 return AVERROR_INVALIDDATA;
2703 ebml_free(ebml_syntax, &ebml);
2705 /* The next thing is a segment. */
2706 pos = avio_tell(matroska->ctx->pb);
2707 res = ebml_parse(matroska, matroska_segments, matroska);
2708 // try resyncing until we find a EBML_STOP type element.
2710 res = matroska_resync(matroska, pos);
2713 pos = avio_tell(matroska->ctx->pb);
2714 res = ebml_parse(matroska, matroska_segment, matroska);
2716 /* Set data_offset as it might be needed later by seek_frame_generic. */
2717 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2718 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2719 matroska_execute_seekhead(matroska);
2721 if (!matroska->time_scale)
2722 matroska->time_scale = 1000000;
2723 if (matroska->duration)
2724 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2725 1000 / AV_TIME_BASE;
2726 av_dict_set(&s->metadata, "title", matroska->title, 0);
2727 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2729 if (matroska->date_utc.size == 8)
2730 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2732 res = matroska_parse_tracks(s);
2736 attachments = attachments_list->elem;
2737 for (j = 0; j < attachments_list->nb_elem; j++) {
2738 if (!(attachments[j].filename && attachments[j].mime &&
2739 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2740 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2742 AVStream *st = avformat_new_stream(s, NULL);
2745 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2746 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2747 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2749 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2750 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2751 strlen(ff_mkv_image_mime_tags[i].str))) {
2752 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2757 attachments[j].stream = st;
2759 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2760 AVPacket *pkt = &st->attached_pic;
2762 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2763 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2765 av_init_packet(pkt);
2766 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2768 return AVERROR(ENOMEM);
2769 pkt->data = attachments[j].bin.data;
2770 pkt->size = attachments[j].bin.size;
2771 pkt->stream_index = st->index;
2772 pkt->flags |= AV_PKT_FLAG_KEY;
2774 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2775 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2777 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2778 attachments[j].bin.size);
2780 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2781 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2782 strlen(ff_mkv_mime_tags[i].str))) {
2783 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2791 chapters = chapters_list->elem;
2792 for (i = 0; i < chapters_list->nb_elem; i++)
2793 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2794 (max_start == 0 || chapters[i].start > max_start)) {
2795 chapters[i].chapter =
2796 avpriv_new_chapter(s, chapters[i].uid,
2797 (AVRational) { 1, 1000000000 },
2798 chapters[i].start, chapters[i].end,
2800 if (chapters[i].chapter) {
2801 av_dict_set(&chapters[i].chapter->metadata,
2802 "title", chapters[i].title, 0);
2804 max_start = chapters[i].start;
2807 matroska_add_index_entries(matroska);
2809 matroska_convert_tags(s);
2813 matroska_read_close(s);
2818 * Put one packet in an application-supplied AVPacket struct.
2819 * Returns 0 on success or -1 on failure.
2821 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2824 if (matroska->queue) {
2825 MatroskaTrack *tracks = matroska->tracks.elem;
2826 MatroskaTrack *track;
2828 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2829 track = &tracks[pkt->stream_index];
2830 if (track->has_palette) {
2831 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2833 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2835 memcpy(pal, track->palette, AVPALETTE_SIZE);
2837 track->has_palette = 0;
2846 * Free all packets in our internal queue.
2848 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2850 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2853 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2854 int *buf_size, int type,
2855 uint32_t **lace_buf, int *laces)
2857 int res = 0, n, size = *buf_size;
2858 uint8_t *data = *buf;
2859 uint32_t *lace_size;
2863 *lace_buf = av_malloc(sizeof(**lace_buf));
2865 return AVERROR(ENOMEM);
2867 *lace_buf[0] = size;
2871 av_assert0(size > 0);
2875 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2877 return AVERROR(ENOMEM);
2880 case 0x1: /* Xiph lacing */
2884 for (n = 0; res == 0 && n < *laces - 1; n++) {
2888 if (size <= total) {
2889 res = AVERROR_INVALIDDATA;
2894 lace_size[n] += temp;
2901 if (size <= total) {
2902 res = AVERROR_INVALIDDATA;
2906 lace_size[n] = size - total;
2910 case 0x2: /* fixed-size lacing */
2911 if (size % (*laces)) {
2912 res = AVERROR_INVALIDDATA;
2915 for (n = 0; n < *laces; n++)
2916 lace_size[n] = size / *laces;
2919 case 0x3: /* EBML lacing */
2923 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2924 if (n < 0 || num > INT_MAX) {
2925 av_log(matroska->ctx, AV_LOG_INFO,
2926 "EBML block data error\n");
2927 res = n<0 ? n : AVERROR_INVALIDDATA;
2932 total = lace_size[0] = num;
2933 for (n = 1; res == 0 && n < *laces - 1; n++) {
2936 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2937 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2938 av_log(matroska->ctx, AV_LOG_INFO,
2939 "EBML block data error\n");
2940 res = r<0 ? r : AVERROR_INVALIDDATA;
2945 lace_size[n] = lace_size[n - 1] + snum;
2946 total += lace_size[n];
2948 if (size <= total) {
2949 res = AVERROR_INVALIDDATA;
2952 lace_size[*laces - 1] = size - total;
2958 *lace_buf = lace_size;
2964 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2965 MatroskaTrack *track, AVStream *st,
2966 uint8_t *data, int size, uint64_t timecode,
2969 int a = st->codecpar->block_align;
2970 int sps = track->audio.sub_packet_size;
2971 int cfs = track->audio.coded_framesize;
2972 int h = track->audio.sub_packet_h;
2973 int y = track->audio.sub_packet_cnt;
2974 int w = track->audio.frame_size;
2977 if (!track->audio.pkt_cnt) {
2978 if (track->audio.sub_packet_cnt == 0)
2979 track->audio.buf_timecode = timecode;
2980 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2981 if (size < cfs * h / 2) {
2982 av_log(matroska->ctx, AV_LOG_ERROR,
2983 "Corrupt int4 RM-style audio packet size\n");
2984 return AVERROR_INVALIDDATA;
2986 for (x = 0; x < h / 2; x++)
2987 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2988 data + x * cfs, cfs);
2989 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2991 av_log(matroska->ctx, AV_LOG_ERROR,
2992 "Corrupt sipr RM-style audio packet size\n");
2993 return AVERROR_INVALIDDATA;
2995 memcpy(track->audio.buf + y * w, data, w);
2997 if (size < sps * w / sps || h<=0 || w%sps) {
2998 av_log(matroska->ctx, AV_LOG_ERROR,
2999 "Corrupt generic RM-style audio packet size\n");
3000 return AVERROR_INVALIDDATA;
3002 for (x = 0; x < w / sps; x++)
3003 memcpy(track->audio.buf +
3004 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3005 data + x * sps, sps);
3008 if (++track->audio.sub_packet_cnt >= h) {
3009 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3010 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3011 track->audio.sub_packet_cnt = 0;
3012 track->audio.pkt_cnt = h * w / a;
3016 while (track->audio.pkt_cnt) {
3018 AVPacket pktl, *pkt = &pktl;
3020 ret = av_new_packet(pkt, a);
3025 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3027 pkt->pts = track->audio.buf_timecode;
3028 track->audio.buf_timecode = AV_NOPTS_VALUE;
3030 pkt->stream_index = st->index;
3031 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3033 av_packet_unref(pkt);
3034 return AVERROR(ENOMEM);
3041 /* reconstruct full wavpack blocks from mangled matroska ones */
3042 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3043 uint8_t **pdst, int *size)
3045 uint8_t *dst = NULL;
3050 int ret, offset = 0;
3052 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3053 return AVERROR_INVALIDDATA;
3055 ver = AV_RL16(track->stream->codecpar->extradata);
3057 samples = AV_RL32(src);
3061 while (srclen >= 8) {
3066 uint32_t flags = AV_RL32(src);
3067 uint32_t crc = AV_RL32(src + 4);
3071 multiblock = (flags & 0x1800) != 0x1800;
3074 ret = AVERROR_INVALIDDATA;
3077 blocksize = AV_RL32(src);
3083 if (blocksize > srclen) {
3084 ret = AVERROR_INVALIDDATA;
3088 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3090 ret = AVERROR(ENOMEM);
3094 dstlen += blocksize + 32;
3096 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3097 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3098 AV_WL16(dst + offset + 8, ver); // version
3099 AV_WL16(dst + offset + 10, 0); // track/index_no
3100 AV_WL32(dst + offset + 12, 0); // total samples
3101 AV_WL32(dst + offset + 16, 0); // block index
3102 AV_WL32(dst + offset + 20, samples); // number of samples
3103 AV_WL32(dst + offset + 24, flags); // flags
3104 AV_WL32(dst + offset + 28, crc); // crc
3105 memcpy(dst + offset + 32, src, blocksize); // block data
3108 srclen -= blocksize;
3109 offset += blocksize + 32;
3112 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3124 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3125 uint8_t **pdst, int *size)
3130 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3131 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3133 return AVERROR(ENOMEM);
3135 AV_WB32(dst, dstlen);
3136 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3137 memcpy(dst + 8, src, dstlen);
3138 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3148 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3149 MatroskaTrack *track,
3151 uint8_t *data, int data_len,
3156 AVPacket pktl, *pkt = &pktl;
3157 uint8_t *id, *settings, *text, *buf;
3158 int id_len, settings_len, text_len;
3163 return AVERROR_INVALIDDATA;
3166 q = data + data_len;
3171 if (*p == '\r' || *p == '\n') {
3180 if (p >= q || *p != '\n')
3181 return AVERROR_INVALIDDATA;
3187 if (*p == '\r' || *p == '\n') {
3188 settings_len = p - settings;
3196 if (p >= q || *p != '\n')
3197 return AVERROR_INVALIDDATA;
3202 while (text_len > 0) {
3203 const int len = text_len - 1;
3204 const uint8_t c = p[len];
3205 if (c != '\r' && c != '\n')
3211 return AVERROR_INVALIDDATA;
3213 err = av_new_packet(pkt, text_len);
3218 memcpy(pkt->data, text, text_len);
3221 buf = av_packet_new_side_data(pkt,
3222 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3225 av_packet_unref(pkt);
3226 return AVERROR(ENOMEM);
3228 memcpy(buf, id, id_len);
3231 if (settings_len > 0) {
3232 buf = av_packet_new_side_data(pkt,
3233 AV_PKT_DATA_WEBVTT_SETTINGS,
3236 av_packet_unref(pkt);
3237 return AVERROR(ENOMEM);
3239 memcpy(buf, settings, settings_len);
3242 // Do we need this for subtitles?
3243 // pkt->flags = AV_PKT_FLAG_KEY;
3245 pkt->stream_index = st->index;
3246 pkt->pts = timecode;
3248 // Do we need this for subtitles?
3249 // pkt->dts = timecode;
3251 pkt->duration = duration;
3254 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3256 av_packet_unref(pkt);
3257 return AVERROR(ENOMEM);
3263 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3264 MatroskaTrack *track, AVStream *st,
3265 AVBufferRef *buf, uint8_t *data, int pkt_size,
3266 uint64_t timecode, uint64_t lace_duration,
3267 int64_t pos, int is_keyframe,
3268 uint8_t *additional, uint64_t additional_id, int additional_size,
3269 int64_t discard_padding)
3271 MatroskaTrackEncoding *encodings = track->encodings.elem;
3272 uint8_t *pkt_data = data;
3274 AVPacket pktl, *pkt = &pktl;
3276 if (encodings && !encodings->type && encodings->scope & 1) {
3277 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3282 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3284 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3286 av_log(matroska->ctx, AV_LOG_ERROR,
3287 "Error parsing a wavpack block.\n");
3290 if (pkt_data != data)
3291 av_freep(&pkt_data);
3295 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3297 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3299 av_log(matroska->ctx, AV_LOG_ERROR,
3300 "Error parsing a prores block.\n");
3303 if (pkt_data != data)
3304 av_freep(&pkt_data);
3308 av_init_packet(pkt);
3309 if (pkt_data != data)
3310 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3313 pkt->buf = av_buffer_ref(buf);
3316 res = AVERROR(ENOMEM);
3320 pkt->data = pkt_data;
3321 pkt->size = pkt_size;
3322 pkt->flags = is_keyframe;
3323 pkt->stream_index = st->index;
3325 if (additional_size > 0) {
3326 uint8_t *side_data = av_packet_new_side_data(pkt,
3327 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3328 additional_size + 8);
3330 av_packet_unref(pkt);
3331 return AVERROR(ENOMEM);
3333 AV_WB64(side_data, additional_id);
3334 memcpy(side_data + 8, additional, additional_size);
3337 if (discard_padding) {
3338 uint8_t *side_data = av_packet_new_side_data(pkt,
3339 AV_PKT_DATA_SKIP_SAMPLES,
3342 av_packet_unref(pkt);
3343 return AVERROR(ENOMEM);
3345 discard_padding = av_rescale_q(discard_padding,
3346 (AVRational){1, 1000000000},
3347 (AVRational){1, st->codecpar->sample_rate});
3348 if (discard_padding > 0) {
3349 AV_WL32(side_data + 4, discard_padding);
3351 AV_WL32(side_data, -discard_padding);
3355 if (track->ms_compat)
3356 pkt->dts = timecode;
3358 pkt->pts = timecode;
3360 pkt->duration = lace_duration;
3362 #if FF_API_CONVERGENCE_DURATION
3363 FF_DISABLE_DEPRECATION_WARNINGS
3364 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3365 pkt->convergence_duration = lace_duration;
3367 FF_ENABLE_DEPRECATION_WARNINGS
3370 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3372 av_packet_unref(pkt);
3373 return AVERROR(ENOMEM);
3379 if (pkt_data != data)
3380 av_freep(&pkt_data);
3384 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3385 int size, int64_t pos, uint64_t cluster_time,
3386 uint64_t block_duration, int is_keyframe,
3387 uint8_t *additional, uint64_t additional_id, int additional_size,
3388 int64_t cluster_pos, int64_t discard_padding)
3390 uint64_t timecode = AV_NOPTS_VALUE;
3391 MatroskaTrack *track;
3395 uint32_t *lace_size = NULL;
3396 int n, flags, laces = 0;
3398 int trust_default_duration = 1;
3400 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3406 track = matroska_find_track_by_num(matroska, num);
3407 if (!track || !track->stream) {
3408 av_log(matroska->ctx, AV_LOG_INFO,
3409 "Invalid stream %"PRIu64"\n", num);
3410 return AVERROR_INVALIDDATA;
3411 } else if (size <= 3)
3414 if (st->discard >= AVDISCARD_ALL)
3416 av_assert1(block_duration != AV_NOPTS_VALUE);
3418 block_time = sign_extend(AV_RB16(data), 16);
3422 if (is_keyframe == -1)
3423 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3425 if (cluster_time != (uint64_t) -1 &&
3426 (block_time >= 0 || cluster_time >= -block_time)) {
3427 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3428 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3429 timecode < track->end_timecode)
3430 is_keyframe = 0; /* overlapping subtitles are not key frame */
3432 ff_reduce_index(matroska->ctx, st->index);
3433 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3438 if (matroska->skip_to_keyframe &&
3439 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3440 // Compare signed timecodes. Timecode may be negative due to codec delay
3441 // offset. We don't support timestamps greater than int64_t anyway - see
3443 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3446 matroska->skip_to_keyframe = 0;
3447 else if (!st->skip_to_keyframe) {
3448 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3449 matroska->skip_to_keyframe = 0;
3453 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3454 &lace_size, &laces);
3459 if (track->audio.samplerate == 8000) {
3460 // If this is needed for more codecs, then add them here
3461 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3462 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3463 trust_default_duration = 0;
3467 if (!block_duration && trust_default_duration)
3468 block_duration = track->default_duration * laces / matroska->time_scale;
3470 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3471 track->end_timecode =
3472 FFMAX(track->end_timecode, timecode + block_duration);
3474 for (n = 0; n < laces; n++) {
3475 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3477 if (lace_size[n] > size) {
3478 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3482 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3483 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3484 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3485 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3486 st->codecpar->block_align && track->audio.sub_packet_size) {
3487 res = matroska_parse_rm_audio(matroska, track, st, data,
3493 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3494 res = matroska_parse_webvtt(matroska, track, st,
3496 timecode, lace_duration,
3501 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3502 timecode, lace_duration, pos,
3503 !n ? is_keyframe : 0,
3504 additional, additional_id, additional_size,
3510 if (timecode != AV_NOPTS_VALUE)
3511 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3512 data += lace_size[n];
3513 size -= lace_size[n];
3521 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3523 MatroskaCluster *cluster = &matroska->current_cluster;
3524 MatroskaBlock *block = &cluster->block;
3526 res = ebml_parse(matroska,
3527 matroska_cluster_parsing,
3532 ebml_level_end(matroska);
3533 cluster->pos = avio_tell(matroska->ctx->pb);
3534 /* sizeof the ID which was already read */
3535 if (matroska->current_id)
3537 res = ebml_parse(matroska,
3540 /* Try parsing the block again. */
3542 res = ebml_parse(matroska,
3543 matroska_cluster_parsing,
3547 if (!res && block->bin.size > 0) {
3548 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3549 uint8_t* additional = block->additional.size > 0 ?
3550 block->additional.data : NULL;
3552 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3553 block->bin.size, block->bin.pos,
3554 matroska->current_cluster.timecode,
3555 block->duration, is_keyframe,
3556 additional, block->additional_id,
3557 block->additional.size,
3559 block->discard_padding);
3562 ebml_free(matroska_blockgroup, block);
3563 memset(block, 0, sizeof(*block));
3568 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3570 MatroskaDemuxContext *matroska = s->priv_data;
3573 while (matroska_deliver_packet(matroska, pkt)) {
3574 int64_t pos = avio_tell(matroska->ctx->pb);
3576 return (ret < 0) ? ret : AVERROR_EOF;
3577 if (matroska_parse_cluster(matroska) < 0)
3578 ret = matroska_resync(matroska, pos);
3584 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3585 int64_t timestamp, int flags)
3587 MatroskaDemuxContext *matroska = s->priv_data;
3588 MatroskaTrack *tracks = NULL;
3589 AVStream *st = s->streams[stream_index];
3592 /* Parse the CUES now since we need the index data to seek. */
3593 if (matroska->cues_parsing_deferred > 0) {
3594 matroska->cues_parsing_deferred = 0;
3595 matroska_parse_cues(matroska);
3598 if (!st->nb_index_entries)
3600 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3602 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3603 matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3604 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3605 matroska_clear_queue(matroska);
3606 if (matroska_parse_cluster(matroska) < 0)
3611 matroska_clear_queue(matroska);
3612 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3615 tracks = matroska->tracks.elem;
3616 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3617 tracks[i].audio.pkt_cnt = 0;
3618 tracks[i].audio.sub_packet_cnt = 0;
3619 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3620 tracks[i].end_timecode = 0;
3623 /* We seek to a level 1 element, so set the appropriate status. */
3624 matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3625 if (flags & AVSEEK_FLAG_ANY) {
3626 st->skip_to_keyframe = 0;
3627 matroska->skip_to_timecode = timestamp;
3629 st->skip_to_keyframe = 1;
3630 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3632 matroska->skip_to_keyframe = 1;
3634 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3637 // slightly hackish but allows proper fallback to
3638 // the generic seeking code.
3639 matroska_reset_status(matroska, 0, -1);
3640 matroska_clear_queue(matroska);
3641 st->skip_to_keyframe =
3642 matroska->skip_to_keyframe = 0;
3647 static int matroska_read_close(AVFormatContext *s)
3649 MatroskaDemuxContext *matroska = s->priv_data;
3650 MatroskaTrack *tracks = matroska->tracks.elem;
3653 matroska_clear_queue(matroska);
3655 for (n = 0; n < matroska->tracks.nb_elem; n++)
3656 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3657 av_freep(&tracks[n].audio.buf);
3658 ebml_free(matroska_segment, matroska);
3664 int64_t start_time_ns;
3665 int64_t end_time_ns;
3666 int64_t start_offset;
3670 /* This function searches all the Cues and returns the CueDesc corresponding to
3671 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3672 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3674 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3675 MatroskaDemuxContext *matroska = s->priv_data;
3678 int nb_index_entries = s->streams[0]->nb_index_entries;
3679 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3680 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3681 for (i = 1; i < nb_index_entries; i++) {
3682 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3683 index_entries[i].timestamp * matroska->time_scale > ts) {
3688 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3689 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3690 if (i != nb_index_entries - 1) {
3691 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3692 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3694 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3695 // FIXME: this needs special handling for files where Cues appear
3696 // before Clusters. the current logic assumes Cues appear after
3698 cue_desc.end_offset = cues_start - matroska->segment_start;
3703 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3705 MatroskaDemuxContext *matroska = s->priv_data;
3706 uint32_t id = matroska->current_id;
3707 int64_t cluster_pos, before_pos;
3709 if (s->streams[0]->nb_index_entries <= 0) return 0;
3710 // seek to the first cluster using cues.
3711 index = av_index_search_timestamp(s->streams[0], 0, 0);
3712 if (index < 0) return 0;
3713 cluster_pos = s->streams[0]->index_entries[index].pos;
3714 before_pos = avio_tell(s->pb);
3716 uint64_t cluster_id, cluster_length;
3719 avio_seek(s->pb, cluster_pos, SEEK_SET);
3720 // read cluster id and length
3721 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3722 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3724 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3728 matroska_reset_status(matroska, 0, cluster_pos);
3729 matroska_clear_queue(matroska);
3730 if (matroska_parse_cluster(matroska) < 0 ||
3734 pkt = &matroska->queue->pkt;
3735 // 4 + read is the length of the cluster id and the cluster length field.
3736 cluster_pos += 4 + read + cluster_length;
3737 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3743 /* Restore the status after matroska_read_header: */
3744 matroska_reset_status(matroska, id, before_pos);
3749 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3750 double min_buffer, double* buffer,
3751 double* sec_to_download, AVFormatContext *s,
3754 double nano_seconds_per_second = 1000000000.0;
3755 double time_sec = time_ns / nano_seconds_per_second;
3757 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3758 int64_t end_time_ns = time_ns + time_to_search_ns;
3759 double sec_downloaded = 0.0;
3760 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3761 if (desc_curr.start_time_ns == -1)
3763 *sec_to_download = 0.0;
3765 // Check for non cue start time.
3766 if (time_ns > desc_curr.start_time_ns) {
3767 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3768 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3769 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3770 double timeToDownload = (cueBytes * 8.0) / bps;
3772 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3773 *sec_to_download += timeToDownload;
3775 // Check if the search ends within the first cue.
3776 if (desc_curr.end_time_ns >= end_time_ns) {
3777 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3778 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3779 sec_downloaded = percent_to_sub * sec_downloaded;
3780 *sec_to_download = percent_to_sub * *sec_to_download;
3783 if ((sec_downloaded + *buffer) <= min_buffer) {
3787 // Get the next Cue.
3788 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3791 while (desc_curr.start_time_ns != -1) {
3792 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3793 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3794 double desc_sec = desc_ns / nano_seconds_per_second;
3795 double bits = (desc_bytes * 8.0);
3796 double time_to_download = bits / bps;
3798 sec_downloaded += desc_sec - time_to_download;
3799 *sec_to_download += time_to_download;
3801 if (desc_curr.end_time_ns >= end_time_ns) {
3802 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3803 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3804 sec_downloaded = percent_to_sub * sec_downloaded;
3805 *sec_to_download = percent_to_sub * *sec_to_download;
3807 if ((sec_downloaded + *buffer) <= min_buffer)
3812 if ((sec_downloaded + *buffer) <= min_buffer) {
3817 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3819 *buffer = *buffer + sec_downloaded;
3823 /* This function computes the bandwidth of the WebM file with the help of
3824 * buffer_size_after_time_downloaded() function. Both of these functions are
3825 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3826 * Matroska parsing mechanism.
3828 * Returns the bandwidth of the file on success; -1 on error.
3830 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3832 MatroskaDemuxContext *matroska = s->priv_data;
3833 AVStream *st = s->streams[0];
3834 double bandwidth = 0.0;
3837 for (i = 0; i < st->nb_index_entries; i++) {
3838 int64_t prebuffer_ns = 1000000000;
3839 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3840 double nano_seconds_per_second = 1000000000.0;
3841 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3842 double prebuffer_bytes = 0.0;
3843 int64_t temp_prebuffer_ns = prebuffer_ns;
3844 int64_t pre_bytes, pre_ns;
3845 double pre_sec, prebuffer, bits_per_second;
3846 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3848 // Start with the first Cue.
3849 CueDesc desc_end = desc_beg;
3851 // Figure out how much data we have downloaded for the prebuffer. This will
3852 // be used later to adjust the bits per sample to try.
3853 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3854 // Prebuffered the entire Cue.
3855 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3856 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3857 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3859 if (desc_end.start_time_ns == -1) {
3860 // The prebuffer is larger than the duration.
3861 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3863 bits_per_second = 0.0;
3865 // The prebuffer ends in the last Cue. Estimate how much data was
3867 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3868 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3869 pre_sec = pre_ns / nano_seconds_per_second;
3871 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3873 prebuffer = prebuffer_ns / nano_seconds_per_second;
3875 // Set this to 0.0 in case our prebuffer buffers the entire video.
3876 bits_per_second = 0.0;
3878 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3879 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3880 double desc_sec = desc_ns / nano_seconds_per_second;
3881 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3883 // Drop the bps by the percentage of bytes buffered.
3884 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3885 double mod_bits_per_second = calc_bits_per_second * percent;
3887 if (prebuffer < desc_sec) {
3889 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3891 // Add 1 so the bits per second should be a little bit greater than file
3893 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3894 const double min_buffer = 0.0;
3895 double buffer = prebuffer;
3896 double sec_to_download = 0.0;
3898 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3899 min_buffer, &buffer, &sec_to_download,
3903 } else if (rv == 0) {
3904 bits_per_second = (double)(bps);
3909 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3910 } while (desc_end.start_time_ns != -1);
3912 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3914 return (int64_t)bandwidth;
3917 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3919 MatroskaDemuxContext *matroska = s->priv_data;
3920 EbmlList *seekhead_list = &matroska->seekhead;
3921 MatroskaSeekhead *seekhead = seekhead_list->elem;
3923 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3927 // determine cues start and end positions
3928 for (i = 0; i < seekhead_list->nb_elem; i++)
3929 if (seekhead[i].id == MATROSKA_ID_CUES)
3932 if (i >= seekhead_list->nb_elem) return -1;
3934 before_pos = avio_tell(matroska->ctx->pb);
3935 cues_start = seekhead[i].pos + matroska->segment_start;
3936 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3937 // cues_end is computed as cues_start + cues_length + length of the
3938 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3939 // cues_end is inclusive and the above sum is reduced by 1.
3940 uint64_t cues_length, cues_id;
3942 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3943 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3944 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3945 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3948 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3950 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3951 if (cues_start == -1 || cues_end == -1) return -1;
3954 matroska_parse_cues(matroska);
3957 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3960 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3962 // if the file has cues at the start, fix up the init range so tht
3963 // it does not include it
3964 if (cues_start <= init_range)
3965 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3968 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3969 if (bandwidth < 0) return -1;
3970 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3972 // check if all clusters start with key frames
3973 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3975 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3976 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3977 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3978 if (!buf) return -1;
3980 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3981 int ret = snprintf(buf + end, 20,
3982 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3983 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3984 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3985 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3987 return AVERROR_INVALIDDATA;
3991 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3997 static int webm_dash_manifest_read_header(AVFormatContext *s)
4000 int ret = matroska_read_header(s);
4002 MatroskaTrack *tracks;
4003 MatroskaDemuxContext *matroska = s->priv_data;
4005 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4008 if (!s->nb_streams) {
4009 matroska_read_close(s);
4010 av_log(s, AV_LOG_ERROR, "No streams found\n");
4011 return AVERROR_INVALIDDATA;
4014 if (!matroska->is_live) {
4015 buf = av_asprintf("%g", matroska->duration);
4016 if (!buf) return AVERROR(ENOMEM);
4017 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4020 // initialization range
4021 // 5 is the offset of Cluster ID.
4022 init_range = avio_tell(s->pb) - 5;
4023 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4026 // basename of the file
4027 buf = strrchr(s->url, '/');
4028 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4031 tracks = matroska->tracks.elem;
4032 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4034 // parse the cues and populate Cue related fields
4035 if (!matroska->is_live) {
4036 ret = webm_dash_manifest_cues(s, init_range);
4038 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4043 // use the bandwidth from the command line if it was provided
4044 if (matroska->bandwidth > 0) {
4045 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4046 matroska->bandwidth, 0);
4051 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4056 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4057 static const AVOption options[] = {
4058 { "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 },
4059 { "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 },
4063 static const AVClass webm_dash_class = {
4064 .class_name = "WebM DASH Manifest demuxer",
4065 .item_name = av_default_item_name,
4067 .version = LIBAVUTIL_VERSION_INT,
4070 AVInputFormat ff_matroska_demuxer = {
4071 .name = "matroska,webm",
4072 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4073 .extensions = "mkv,mk3d,mka,mks",
4074 .priv_data_size = sizeof(MatroskaDemuxContext),
4075 .read_probe = matroska_probe,
4076 .read_header = matroska_read_header,
4077 .read_packet = matroska_read_packet,
4078 .read_close = matroska_read_close,
4079 .read_seek = matroska_read_seek,
4080 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4083 AVInputFormat ff_webm_dash_manifest_demuxer = {
4084 .name = "webm_dash_manifest",
4085 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4086 .priv_data_size = sizeof(MatroskaDemuxContext),
4087 .read_header = webm_dash_manifest_read_header,
4088 .read_packet = webm_dash_manifest_read_packet,
4089 .read_close = matroska_read_close,
4090 .priv_class = &webm_dash_class,