2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
89 typedef const struct EbmlSyntax {
99 const struct EbmlSyntax *n;
103 typedef struct EbmlList {
108 typedef struct EbmlBin {
115 typedef struct Ebml {
120 uint64_t doctype_version;
123 typedef struct MatroskaTrackCompression {
126 } MatroskaTrackCompression;
128 typedef struct MatroskaTrackEncryption {
131 } MatroskaTrackEncryption;
133 typedef struct MatroskaTrackEncoding {
136 MatroskaTrackCompression compression;
137 MatroskaTrackEncryption encryption;
138 } MatroskaTrackEncoding;
140 typedef struct MatroskaMasteringMeta {
149 double max_luminance;
150 double min_luminance;
151 } MatroskaMasteringMeta;
153 typedef struct MatroskaTrackVideoColor {
154 uint64_t matrix_coefficients;
155 uint64_t bits_per_channel;
156 uint64_t chroma_sub_horz;
157 uint64_t chroma_sub_vert;
158 uint64_t cb_sub_horz;
159 uint64_t cb_sub_vert;
160 uint64_t chroma_siting_horz;
161 uint64_t chroma_siting_vert;
163 uint64_t transfer_characteristics;
167 MatroskaMasteringMeta mastering_meta;
168 } MatroskaTrackVideoColor;
170 typedef struct MatroskaTrackVideoProjection {
176 } MatroskaTrackVideoProjection;
178 typedef struct MatroskaTrackVideo {
180 uint64_t display_width;
181 uint64_t display_height;
182 uint64_t pixel_width;
183 uint64_t pixel_height;
185 uint64_t display_unit;
187 uint64_t field_order;
188 uint64_t stereo_mode;
191 MatroskaTrackVideoProjection projection;
192 } MatroskaTrackVideo;
194 typedef struct MatroskaTrackAudio {
196 double out_samplerate;
200 /* real audio header (extracted from extradata) */
207 uint64_t buf_timecode;
209 } MatroskaTrackAudio;
211 typedef struct MatroskaTrackPlane {
214 } MatroskaTrackPlane;
216 typedef struct MatroskaTrackOperation {
217 EbmlList combine_planes;
218 } MatroskaTrackOperation;
220 typedef struct MatroskaTrack {
229 uint64_t default_duration;
230 uint64_t flag_default;
231 uint64_t flag_forced;
232 uint64_t seek_preroll;
233 MatroskaTrackVideo video;
234 MatroskaTrackAudio audio;
235 MatroskaTrackOperation operation;
237 uint64_t codec_delay;
238 uint64_t codec_delay_in_track_tb;
241 int64_t end_timecode;
243 uint64_t max_block_additional_id;
245 uint32_t palette[AVPALETTE_COUNT];
249 typedef struct MatroskaAttachment {
256 } MatroskaAttachment;
258 typedef struct MatroskaChapter {
267 typedef struct MatroskaIndexPos {
272 typedef struct MatroskaIndex {
277 typedef struct MatroskaTag {
285 typedef struct MatroskaTagTarget {
293 typedef struct MatroskaTags {
294 MatroskaTagTarget target;
298 typedef struct MatroskaSeekhead {
303 typedef struct MatroskaLevel {
308 typedef struct MatroskaBlock {
313 uint64_t additional_id;
315 int64_t discard_padding;
318 typedef struct MatroskaCluster {
324 typedef struct MatroskaLevel1Element {
328 } MatroskaLevel1Element;
330 typedef struct MatroskaDemuxContext {
331 const AVClass *class;
332 AVFormatContext *ctx;
336 MatroskaLevel levels[EBML_MAX_DEPTH];
345 EbmlList attachments;
351 /* byte position of the segment inside the stream */
352 int64_t segment_start;
354 /* the packet queue */
356 AVPacketList *queue_end;
360 /* What to skip before effectively reading a packet. */
361 int skip_to_keyframe;
362 uint64_t skip_to_timecode;
364 /* File has a CUES element, but we defer parsing until it is needed. */
365 int cues_parsing_deferred;
367 /* Level1 elements and whether they were read yet */
368 MatroskaLevel1Element level1_elems[64];
369 int num_level1_elems;
371 MatroskaCluster current_cluster;
373 /* WebM DASH Manifest live flag */
376 /* Bandwidth value for WebM DASH Manifest */
378 } MatroskaDemuxContext;
380 static const EbmlSyntax ebml_header[] = {
381 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
382 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
383 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
384 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
385 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
386 { EBML_ID_EBMLVERSION, EBML_NONE },
387 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
391 static const EbmlSyntax ebml_syntax[] = {
392 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
396 static const EbmlSyntax matroska_info[] = {
397 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
398 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
399 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
400 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
401 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
402 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
403 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
407 static const EbmlSyntax matroska_mastering_meta[] = {
408 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
421 static const EbmlSyntax matroska_track_video_color[] = {
422 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
423 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
434 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
439 static const EbmlSyntax matroska_track_video_projection[] = {
440 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
441 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
448 static const EbmlSyntax matroska_track_video[] = {
449 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
450 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
451 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
452 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
453 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
454 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
455 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
456 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
457 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
458 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
462 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
463 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
464 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
466 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
470 static const EbmlSyntax matroska_track_audio[] = {
471 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
472 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
473 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
474 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
478 static const EbmlSyntax matroska_track_encoding_compression[] = {
479 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
480 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
484 static const EbmlSyntax matroska_track_encoding_encryption[] = {
485 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
486 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
487 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
494 static const EbmlSyntax matroska_track_encoding[] = {
495 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
496 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
497 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
498 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
499 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
503 static const EbmlSyntax matroska_track_encodings[] = {
504 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
508 static const EbmlSyntax matroska_track_plane[] = {
509 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
510 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
514 static const EbmlSyntax matroska_track_combine_planes[] = {
515 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
519 static const EbmlSyntax matroska_track_operation[] = {
520 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
524 static const EbmlSyntax matroska_track[] = {
525 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
526 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
527 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
528 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
529 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
530 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
531 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
532 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
533 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
534 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
535 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
536 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
537 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
538 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
539 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
540 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
541 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
542 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
543 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
544 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
545 { MATROSKA_ID_CODECNAME, EBML_NONE },
546 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
547 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
548 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
549 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
550 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
554 static const EbmlSyntax matroska_tracks[] = {
555 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
559 static const EbmlSyntax matroska_attachment[] = {
560 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
561 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
562 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
563 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
564 { MATROSKA_ID_FILEDESC, EBML_NONE },
568 static const EbmlSyntax matroska_attachments[] = {
569 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
573 static const EbmlSyntax matroska_chapter_display[] = {
574 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
575 { MATROSKA_ID_CHAPLANG, EBML_NONE },
576 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
580 static const EbmlSyntax matroska_chapter_entry[] = {
581 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
582 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
584 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
585 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
586 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
587 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
588 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
592 static const EbmlSyntax matroska_chapter[] = {
593 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
594 { MATROSKA_ID_EDITIONUID, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
601 static const EbmlSyntax matroska_chapters[] = {
602 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
606 static const EbmlSyntax matroska_index_pos[] = {
607 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
608 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
609 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
610 { MATROSKA_ID_CUEDURATION, EBML_NONE },
611 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
615 static const EbmlSyntax matroska_index_entry[] = {
616 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
617 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
621 static const EbmlSyntax matroska_index[] = {
622 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
626 static const EbmlSyntax matroska_simpletag[] = {
627 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
628 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
629 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
630 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
631 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
636 static const EbmlSyntax matroska_tagtargets[] = {
637 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
638 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
639 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
640 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
641 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
645 static const EbmlSyntax matroska_tag[] = {
646 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
647 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
651 static const EbmlSyntax matroska_tags[] = {
652 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
656 static const EbmlSyntax matroska_seekhead_entry[] = {
657 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
658 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
662 static const EbmlSyntax matroska_seekhead[] = {
663 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
667 static const EbmlSyntax matroska_segment[] = {
668 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
669 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
670 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
671 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
672 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
673 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
674 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
675 { MATROSKA_ID_CLUSTER, EBML_STOP },
679 static const EbmlSyntax matroska_segments[] = {
680 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
684 static const EbmlSyntax matroska_blockmore[] = {
685 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
686 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
690 static const EbmlSyntax matroska_blockadditions[] = {
691 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
695 static const EbmlSyntax matroska_blockgroup[] = {
696 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
697 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
698 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
699 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
700 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
701 { MATROSKA_ID_CODECSTATE, EBML_NONE },
702 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706 static const EbmlSyntax matroska_cluster_parsing[] = {
707 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
708 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
709 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
710 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
711 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
712 { MATROSKA_ID_INFO, EBML_NONE },
713 { MATROSKA_ID_CUES, EBML_NONE },
714 { MATROSKA_ID_TAGS, EBML_NONE },
715 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
716 { MATROSKA_ID_CLUSTER, EBML_STOP },
720 static const EbmlSyntax matroska_cluster[] = {
721 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
722 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
723 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
724 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
725 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
729 static const EbmlSyntax matroska_clusters[] = {
730 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
731 { MATROSKA_ID_INFO, EBML_NONE },
732 { MATROSKA_ID_CUES, EBML_NONE },
733 { MATROSKA_ID_TAGS, EBML_NONE },
734 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
738 static const char *const matroska_doctypes[] = { "matroska", "webm" };
740 static int matroska_read_close(AVFormatContext *s);
742 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
744 AVIOContext *pb = matroska->ctx->pb;
747 matroska->current_id = 0;
748 matroska->num_levels = 0;
750 /* seek to next position to resync from */
751 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
758 // try to find a toplevel element
759 while (!avio_feof(pb)) {
760 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
761 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
762 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
763 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
764 matroska->current_id = id;
767 id = (id << 8) | avio_r8(pb);
775 * Return: Whether we reached the end of a level in the hierarchy or not.
777 static int ebml_level_end(MatroskaDemuxContext *matroska)
779 AVIOContext *pb = matroska->ctx->pb;
780 int64_t pos = avio_tell(pb);
782 if (matroska->num_levels > 0) {
783 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
784 if (pos - level->start >= level->length || matroska->current_id) {
785 matroska->num_levels--;
789 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
793 * Read: an "EBML number", which is defined as a variable-length
794 * array of bytes. The first byte indicates the length by giving a
795 * number of 0-bits followed by a one. The position of the first
796 * "one" bit inside the first byte indicates the length of this
798 * Returns: number of bytes read, < 0 on error
800 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
801 int max_size, uint64_t *number, int eof_forbidden)
807 /* The first byte tells us the length in bytes - except when it is zero. */
812 /* get the length of the EBML number */
813 read = 8 - ff_log2_tab[total];
815 if (!total || read > max_size) {
816 pos = avio_tell(pb) - 1;
818 av_log(matroska->ctx, AV_LOG_ERROR,
819 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
820 "of an EBML number\n", pos, pos);
822 av_log(matroska->ctx, AV_LOG_ERROR,
823 "Length %d indicated by an EBML number's first byte 0x%02x "
824 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
825 read, (uint8_t) total, pos, pos, max_size);
827 return AVERROR_INVALIDDATA;
830 /* read out length */
831 total ^= 1 << ff_log2_tab[total];
833 total = (total << 8) | avio_r8(pb);
835 if (pb->eof_reached) {
847 av_log(matroska->ctx, AV_LOG_ERROR,
848 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
853 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
854 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
861 * Read a EBML length value.
862 * This needs special handling for the "unknown length" case which has multiple
865 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
868 int res = ebml_read_num(matroska, pb, 8, number, 1);
869 if (res > 0 && *number + 1 == 1ULL << (7 * res))
870 *number = EBML_UNKNOWN_LENGTH;
875 * Read the next element as an unsigned int.
876 * Returns NEEDS_CHECKING.
878 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
882 /* big-endian ordering; build up number */
885 *num = (*num << 8) | avio_r8(pb);
887 return NEEDS_CHECKING;
891 * Read the next element as a signed int.
892 * Returns NEEDS_CHECKING.
894 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
901 *num = sign_extend(avio_r8(pb), 8);
903 /* big-endian ordering; build up number */
905 *num = ((uint64_t)*num << 8) | avio_r8(pb);
908 return NEEDS_CHECKING;
912 * Read the next element as a float.
913 * Returns NEEDS_CHECKING or < 0 on obvious failure.
915 static int ebml_read_float(AVIOContext *pb, int size, double *num)
920 *num = av_int2float(avio_rb32(pb));
922 *num = av_int2double(avio_rb64(pb));
924 return AVERROR_INVALIDDATA;
926 return NEEDS_CHECKING;
930 * Read the next element as an ASCII string.
931 * 0 is success, < 0 or NEEDS_CHECKING is failure.
933 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
938 /* EBML strings are usually not 0-terminated, so we allocate one
939 * byte more, read the string and NULL-terminate it ourselves. */
940 if (!(res = av_malloc(size + 1)))
941 return AVERROR(ENOMEM);
942 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
944 return ret < 0 ? ret : NEEDS_CHECKING;
954 * Read the next element as binary data.
955 * 0 is success, < 0 or NEEDS_CHECKING is failure.
957 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
961 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
964 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
966 bin->data = bin->buf->data;
968 bin->pos = avio_tell(pb);
969 if ((ret = avio_read(pb, bin->data, length)) != length) {
970 av_buffer_unref(&bin->buf);
973 return ret < 0 ? ret : NEEDS_CHECKING;
980 * Read the next element, but only the header. The contents
981 * are supposed to be sub-elements which can be read separately.
982 * 0 is success, < 0 is failure.
984 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
986 AVIOContext *pb = matroska->ctx->pb;
987 MatroskaLevel *level;
989 if (matroska->num_levels >= EBML_MAX_DEPTH) {
990 av_log(matroska->ctx, AV_LOG_ERROR,
991 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
992 return AVERROR(ENOSYS);
995 level = &matroska->levels[matroska->num_levels++];
996 level->start = avio_tell(pb);
997 level->length = length;
1003 * Read signed/unsigned "EBML" numbers.
1004 * Return: number of bytes processed, < 0 on error
1006 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1007 uint8_t *data, uint32_t size, uint64_t *num)
1010 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1011 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1015 * Same as above, but signed.
1017 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1018 uint8_t *data, uint32_t size, int64_t *num)
1023 /* read as unsigned number first */
1024 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1027 /* make signed (weird way) */
1028 *num = unum - ((1LL << (7 * res - 1)) - 1);
1033 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1034 EbmlSyntax *syntax, void *data);
1036 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1037 uint32_t id, void *data)
1040 for (i = 0; syntax[i].id; i++)
1041 if (id == syntax[i].id)
1043 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1044 matroska->num_levels > 0 &&
1045 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1046 return 0; // we reached the end of an unknown size cluster
1047 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1048 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1050 return ebml_parse_elem(matroska, &syntax[i], data);
1053 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1056 if (!matroska->current_id) {
1058 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id, 0);
1060 // in live mode, finish parsing if EOF is reached.
1061 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1062 res == AVERROR_EOF) ? 1 : res;
1064 matroska->current_id = id | 1 << 7 * res;
1066 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1069 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1074 for (i = 0; syntax[i].id; i++)
1075 switch (syntax[i].type) {
1077 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1080 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1083 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1087 // the default may be NULL
1088 if (syntax[i].def.s) {
1089 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1090 *dst = av_strdup(syntax[i].def.s);
1092 return AVERROR(ENOMEM);
1097 while (!res && !ebml_level_end(matroska))
1098 res = ebml_parse(matroska, syntax, data);
1103 static int is_ebml_id_valid(uint32_t id)
1105 // Due to endian nonsense in Matroska, the highest byte with any bits set
1106 // will contain the leading length bit. This bit in turn identifies the
1107 // total byte length of the element by its position within the byte.
1108 unsigned int bits = av_log2(id);
1109 return id && (bits + 7) / 8 == (8 - bits % 8);
1113 * Allocate and return the entry for the level1 element with the given ID. If
1114 * an entry already exists, return the existing entry.
1116 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1120 MatroskaLevel1Element *elem;
1122 if (!is_ebml_id_valid(id))
1125 // Some files link to all clusters; useless.
1126 if (id == MATROSKA_ID_CLUSTER)
1129 // There can be multiple seekheads.
1130 if (id != MATROSKA_ID_SEEKHEAD) {
1131 for (i = 0; i < matroska->num_level1_elems; i++) {
1132 if (matroska->level1_elems[i].id == id)
1133 return &matroska->level1_elems[i];
1137 // Only a completely broken file would have more elements.
1138 // It also provides a low-effort way to escape from circular seekheads
1139 // (every iteration will add a level1 entry).
1140 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1141 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1145 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1146 *elem = (MatroskaLevel1Element){.id = id};
1151 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1152 EbmlSyntax *syntax, void *data)
1154 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1158 // max. 16 MB for strings
1159 [EBML_STR] = 0x1000000,
1160 [EBML_UTF8] = 0x1000000,
1161 // max. 256 MB for binary data
1162 [EBML_BIN] = 0x10000000,
1163 // no limits for anything else
1165 AVIOContext *pb = matroska->ctx->pb;
1166 uint32_t id = syntax->id;
1170 MatroskaLevel1Element *level1_elem;
1172 data = (char *) data + syntax->data_offset;
1173 if (syntax->list_elem_size) {
1174 EbmlList *list = data;
1175 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1177 return AVERROR(ENOMEM);
1178 list->elem = newelem;
1179 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1180 memset(data, 0, syntax->list_elem_size);
1184 if (syntax->type != EBML_STOP) {
1185 matroska->current_id = 0;
1186 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1188 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1189 av_log(matroska->ctx, AV_LOG_ERROR,
1190 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1191 length, max_lengths[syntax->type], syntax->type);
1192 return AVERROR_INVALIDDATA;
1194 if (matroska->num_levels > 0) {
1195 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1196 AVIOContext *pb = matroska->ctx->pb;
1197 int64_t pos = avio_tell(pb);
1199 if (length != EBML_UNKNOWN_LENGTH &&
1200 level->length != EBML_UNKNOWN_LENGTH) {
1201 uint64_t elem_end = pos + length,
1202 level_end = level->start + level->length;
1204 if (level_end < elem_end) {
1205 av_log(matroska->ctx, AV_LOG_ERROR,
1206 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1207 "containing master element ending at 0x%"PRIx64"\n",
1208 pos, elem_end, level_end);
1209 return AVERROR_INVALIDDATA;
1211 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1212 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1213 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1214 return AVERROR_INVALIDDATA;
1215 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1216 // According to the specifications only clusters and segments
1217 // are allowed to be unknown-sized.
1218 av_log(matroska->ctx, AV_LOG_ERROR,
1219 "Found unknown-sized element other than a cluster at "
1220 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1221 return AVERROR_INVALIDDATA;
1226 switch (syntax->type) {
1228 res = ebml_read_uint(pb, length, data);
1231 res = ebml_read_sint(pb, length, data);
1234 res = ebml_read_float(pb, length, data);
1238 res = ebml_read_ascii(pb, length, data);
1241 res = ebml_read_binary(pb, length, data);
1245 if ((res = ebml_read_master(matroska, length)) < 0)
1247 if (id == MATROSKA_ID_SEGMENT)
1248 matroska->segment_start = avio_tell(matroska->ctx->pb);
1249 if (id == MATROSKA_ID_CUES)
1250 matroska->cues_parsing_deferred = 0;
1251 if (syntax->type == EBML_LEVEL1 &&
1252 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1253 if (level1_elem->parsed)
1254 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1255 level1_elem->parsed = 1;
1257 return ebml_parse_nest(matroska, syntax->def.n, data);
1263 if (ffio_limit(pb, length) != length) {
1264 // ffio_limit emits its own error message,
1265 // so we don't have to.
1266 return AVERROR(EIO);
1268 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1269 // avio_skip might take us past EOF. We check for this
1270 // by skipping only length - 1 bytes, reading a byte and
1271 // checking the error flags. This is done in order to check
1272 // that the element has been properly skipped even when
1273 // no filesize (that ffio_limit relies on) is available.
1275 res = NEEDS_CHECKING;
1282 if (res == NEEDS_CHECKING) {
1283 if (pb->eof_reached) {
1292 if (res == AVERROR_INVALIDDATA)
1293 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1294 else if (res == AVERROR(EIO))
1295 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1296 else if (res == AVERROR_EOF) {
1297 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1304 static void ebml_free(EbmlSyntax *syntax, void *data)
1307 for (i = 0; syntax[i].id; i++) {
1308 void *data_off = (char *) data + syntax[i].data_offset;
1309 switch (syntax[i].type) {
1315 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1319 if (syntax[i].list_elem_size) {
1320 EbmlList *list = data_off;
1321 char *ptr = list->elem;
1322 for (j = 0; j < list->nb_elem;
1323 j++, ptr += syntax[i].list_elem_size)
1324 ebml_free(syntax[i].def.n, ptr);
1325 av_freep(&list->elem);
1328 ebml_free(syntax[i].def.n, data_off);
1338 static int matroska_probe(const AVProbeData *p)
1341 int len_mask = 0x80, size = 1, n = 1, i;
1344 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1347 /* length of header */
1349 while (size <= 8 && !(total & len_mask)) {
1355 total &= (len_mask - 1);
1357 total = (total << 8) | p->buf[4 + n++];
1359 /* Does the probe data contain the whole header? */
1360 if (p->buf_size < 4 + size + total)
1363 /* The header should contain a known document type. For now,
1364 * we don't parse the whole header but simply check for the
1365 * availability of that array of characters inside the header.
1366 * Not fully fool-proof, but good enough. */
1367 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1368 size_t probelen = strlen(matroska_doctypes[i]);
1369 if (total < probelen)
1371 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1372 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1373 return AVPROBE_SCORE_MAX;
1376 // probably valid EBML header but no recognized doctype
1377 return AVPROBE_SCORE_EXTENSION;
1380 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1383 MatroskaTrack *tracks = matroska->tracks.elem;
1386 for (i = 0; i < matroska->tracks.nb_elem; i++)
1387 if (tracks[i].num == num)
1390 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1394 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1395 MatroskaTrack *track)
1397 MatroskaTrackEncoding *encodings = track->encodings.elem;
1398 uint8_t *data = *buf;
1399 int isize = *buf_size;
1400 uint8_t *pkt_data = NULL;
1401 uint8_t av_unused *newpktdata;
1402 int pkt_size = isize;
1406 if (pkt_size >= 10000000U)
1407 return AVERROR_INVALIDDATA;
1409 switch (encodings[0].compression.algo) {
1410 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1412 int header_size = encodings[0].compression.settings.size;
1413 uint8_t *header = encodings[0].compression.settings.data;
1415 if (header_size && !header) {
1416 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1423 pkt_size = isize + header_size;
1424 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1426 return AVERROR(ENOMEM);
1428 memcpy(pkt_data, header, header_size);
1429 memcpy(pkt_data + header_size, data, isize);
1433 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1435 olen = pkt_size *= 3;
1436 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1437 + AV_INPUT_BUFFER_PADDING_SIZE);
1439 result = AVERROR(ENOMEM);
1442 pkt_data = newpktdata;
1443 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1444 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1446 result = AVERROR_INVALIDDATA;
1453 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1455 z_stream zstream = { 0 };
1456 if (inflateInit(&zstream) != Z_OK)
1458 zstream.next_in = data;
1459 zstream.avail_in = isize;
1462 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1464 inflateEnd(&zstream);
1465 result = AVERROR(ENOMEM);
1468 pkt_data = newpktdata;
1469 zstream.avail_out = pkt_size - zstream.total_out;
1470 zstream.next_out = pkt_data + zstream.total_out;
1471 result = inflate(&zstream, Z_NO_FLUSH);
1472 } while (result == Z_OK && pkt_size < 10000000);
1473 pkt_size = zstream.total_out;
1474 inflateEnd(&zstream);
1475 if (result != Z_STREAM_END) {
1476 if (result == Z_MEM_ERROR)
1477 result = AVERROR(ENOMEM);
1479 result = AVERROR_INVALIDDATA;
1486 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1488 bz_stream bzstream = { 0 };
1489 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1491 bzstream.next_in = data;
1492 bzstream.avail_in = isize;
1495 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1497 BZ2_bzDecompressEnd(&bzstream);
1498 result = AVERROR(ENOMEM);
1501 pkt_data = newpktdata;
1502 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1503 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1504 result = BZ2_bzDecompress(&bzstream);
1505 } while (result == BZ_OK && pkt_size < 10000000);
1506 pkt_size = bzstream.total_out_lo32;
1507 BZ2_bzDecompressEnd(&bzstream);
1508 if (result != BZ_STREAM_END) {
1509 if (result == BZ_MEM_ERROR)
1510 result = AVERROR(ENOMEM);
1512 result = AVERROR_INVALIDDATA;
1519 return AVERROR_INVALIDDATA;
1522 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1525 *buf_size = pkt_size;
1533 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1534 AVDictionary **metadata, char *prefix)
1536 MatroskaTag *tags = list->elem;
1540 for (i = 0; i < list->nb_elem; i++) {
1541 const char *lang = tags[i].lang &&
1542 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1544 if (!tags[i].name) {
1545 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1549 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1551 av_strlcpy(key, tags[i].name, sizeof(key));
1552 if (tags[i].def || !lang) {
1553 av_dict_set(metadata, key, tags[i].string, 0);
1554 if (tags[i].sub.nb_elem)
1555 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1558 av_strlcat(key, "-", sizeof(key));
1559 av_strlcat(key, lang, sizeof(key));
1560 av_dict_set(metadata, key, tags[i].string, 0);
1561 if (tags[i].sub.nb_elem)
1562 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1565 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1568 static void matroska_convert_tags(AVFormatContext *s)
1570 MatroskaDemuxContext *matroska = s->priv_data;
1571 MatroskaTags *tags = matroska->tags.elem;
1574 for (i = 0; i < matroska->tags.nb_elem; i++) {
1575 if (tags[i].target.attachuid) {
1576 MatroskaAttachment *attachment = matroska->attachments.elem;
1578 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1579 if (attachment[j].uid == tags[i].target.attachuid &&
1580 attachment[j].stream) {
1581 matroska_convert_tag(s, &tags[i].tag,
1582 &attachment[j].stream->metadata, NULL);
1587 av_log(NULL, AV_LOG_WARNING,
1588 "The tags at index %d refer to a "
1589 "non-existent attachment %"PRId64".\n",
1590 i, tags[i].target.attachuid);
1592 } else if (tags[i].target.chapteruid) {
1593 MatroskaChapter *chapter = matroska->chapters.elem;
1595 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1596 if (chapter[j].uid == tags[i].target.chapteruid &&
1597 chapter[j].chapter) {
1598 matroska_convert_tag(s, &tags[i].tag,
1599 &chapter[j].chapter->metadata, NULL);
1604 av_log(NULL, AV_LOG_WARNING,
1605 "The tags at index %d refer to a non-existent chapter "
1607 i, tags[i].target.chapteruid);
1609 } else if (tags[i].target.trackuid) {
1610 MatroskaTrack *track = matroska->tracks.elem;
1612 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1613 if (track[j].uid == tags[i].target.trackuid &&
1615 matroska_convert_tag(s, &tags[i].tag,
1616 &track[j].stream->metadata, NULL);
1621 av_log(NULL, AV_LOG_WARNING,
1622 "The tags at index %d refer to a non-existent track "
1624 i, tags[i].target.trackuid);
1627 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1628 tags[i].target.type);
1633 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1636 uint32_t saved_id = matroska->current_id;
1637 int64_t before_pos = avio_tell(matroska->ctx->pb);
1638 MatroskaLevel level;
1643 offset = pos + matroska->segment_start;
1644 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1645 /* We don't want to lose our seekhead level, so we add
1646 * a dummy. This is a crude hack. */
1647 if (matroska->num_levels == EBML_MAX_DEPTH) {
1648 av_log(matroska->ctx, AV_LOG_INFO,
1649 "Max EBML element depth (%d) reached, "
1650 "cannot parse further.\n", EBML_MAX_DEPTH);
1651 ret = AVERROR_INVALIDDATA;
1654 level.length = EBML_UNKNOWN_LENGTH;
1655 matroska->levels[matroska->num_levels] = level;
1656 matroska->num_levels++;
1657 matroska->current_id = 0;
1659 ret = ebml_parse(matroska, matroska_segment, matroska);
1661 /* remove dummy level */
1662 while (matroska->num_levels) {
1663 uint64_t length = matroska->levels[--matroska->num_levels].length;
1664 if (length == EBML_UNKNOWN_LENGTH)
1670 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1671 matroska->current_id = saved_id;
1676 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1678 EbmlList *seekhead_list = &matroska->seekhead;
1681 // we should not do any seeking in the streaming case
1682 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1685 for (i = 0; i < seekhead_list->nb_elem; i++) {
1686 MatroskaSeekhead *seekheads = seekhead_list->elem;
1687 uint32_t id = seekheads[i].id;
1688 uint64_t pos = seekheads[i].pos;
1690 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1691 if (!elem || elem->parsed)
1696 // defer cues parsing until we actually need cue data.
1697 if (id == MATROSKA_ID_CUES)
1700 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1701 // mark index as broken
1702 matroska->cues_parsing_deferred = -1;
1710 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1712 EbmlList *index_list;
1713 MatroskaIndex *index;
1714 uint64_t index_scale = 1;
1717 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1720 index_list = &matroska->index;
1721 index = index_list->elem;
1722 if (index_list->nb_elem < 2)
1724 if (index[1].time > 1E14 / matroska->time_scale) {
1725 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1728 for (i = 0; i < index_list->nb_elem; i++) {
1729 EbmlList *pos_list = &index[i].pos;
1730 MatroskaIndexPos *pos = pos_list->elem;
1731 for (j = 0; j < pos_list->nb_elem; j++) {
1732 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1734 if (track && track->stream)
1735 av_add_index_entry(track->stream,
1736 pos[j].pos + matroska->segment_start,
1737 index[i].time / index_scale, 0, 0,
1743 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1746 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1749 for (i = 0; i < matroska->num_level1_elems; i++) {
1750 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1751 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1752 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1753 matroska->cues_parsing_deferred = -1;
1759 matroska_add_index_entries(matroska);
1762 static int matroska_aac_profile(char *codec_id)
1764 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1767 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1768 if (strstr(codec_id, aac_profiles[profile]))
1773 static int matroska_aac_sri(int samplerate)
1777 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1778 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1783 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1785 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1786 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1789 static int matroska_parse_flac(AVFormatContext *s,
1790 MatroskaTrack *track,
1793 AVStream *st = track->stream;
1794 uint8_t *p = track->codec_priv.data;
1795 int size = track->codec_priv.size;
1797 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1798 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1799 track->codec_priv.size = 0;
1803 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1805 p += track->codec_priv.size;
1806 size -= track->codec_priv.size;
1808 /* parse the remaining metadata blocks if present */
1810 int block_last, block_type, block_size;
1812 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1816 if (block_size > size)
1819 /* check for the channel mask */
1820 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1821 AVDictionary *dict = NULL;
1822 AVDictionaryEntry *chmask;
1824 ff_vorbis_comment(s, &dict, p, block_size, 0);
1825 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1827 uint64_t mask = strtol(chmask->value, NULL, 0);
1828 if (!mask || mask & ~0x3ffffULL) {
1829 av_log(s, AV_LOG_WARNING,
1830 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1832 st->codecpar->channel_layout = mask;
1834 av_dict_free(&dict);
1844 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1846 int major, minor, micro, bttb = 0;
1848 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1849 * this function, and fixed in 57.52 */
1850 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1851 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1853 switch (field_order) {
1854 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1855 return AV_FIELD_PROGRESSIVE;
1856 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1857 return AV_FIELD_UNKNOWN;
1858 case MATROSKA_VIDEO_FIELDORDER_TT:
1860 case MATROSKA_VIDEO_FIELDORDER_BB:
1862 case MATROSKA_VIDEO_FIELDORDER_BT:
1863 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1864 case MATROSKA_VIDEO_FIELDORDER_TB:
1865 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1867 return AV_FIELD_UNKNOWN;
1871 static void mkv_stereo_mode_display_mul(int stereo_mode,
1872 int *h_width, int *h_height)
1874 switch (stereo_mode) {
1875 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1876 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1877 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1878 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1879 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1881 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1882 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1883 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1884 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1887 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1888 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1889 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1890 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1896 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1897 const MatroskaTrackVideoColor *color = track->video.color.elem;
1898 const MatroskaMasteringMeta *mastering_meta;
1899 int has_mastering_primaries, has_mastering_luminance;
1901 if (!track->video.color.nb_elem)
1904 mastering_meta = &color->mastering_meta;
1905 // Mastering primaries are CIE 1931 coords, and must be > 0.
1906 has_mastering_primaries =
1907 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1908 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1909 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1910 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1911 has_mastering_luminance = mastering_meta->max_luminance > 0;
1913 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1914 st->codecpar->color_space = color->matrix_coefficients;
1915 if (color->primaries != AVCOL_PRI_RESERVED &&
1916 color->primaries != AVCOL_PRI_RESERVED0)
1917 st->codecpar->color_primaries = color->primaries;
1918 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1919 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1920 st->codecpar->color_trc = color->transfer_characteristics;
1921 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1922 color->range <= AVCOL_RANGE_JPEG)
1923 st->codecpar->color_range = color->range;
1924 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1925 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1926 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1927 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1928 st->codecpar->chroma_location =
1929 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1930 (color->chroma_siting_vert - 1) << 7);
1932 if (color->max_cll && color->max_fall) {
1935 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1937 return AVERROR(ENOMEM);
1938 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1939 (uint8_t *)metadata, size);
1941 av_freep(&metadata);
1944 metadata->MaxCLL = color->max_cll;
1945 metadata->MaxFALL = color->max_fall;
1948 if (has_mastering_primaries || has_mastering_luminance) {
1949 // Use similar rationals as other standards.
1950 const int chroma_den = 50000;
1951 const int luma_den = 10000;
1952 AVMasteringDisplayMetadata *metadata =
1953 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1954 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1955 sizeof(AVMasteringDisplayMetadata));
1957 return AVERROR(ENOMEM);
1959 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1960 if (has_mastering_primaries) {
1961 metadata->display_primaries[0][0] = av_make_q(
1962 round(mastering_meta->r_x * chroma_den), chroma_den);
1963 metadata->display_primaries[0][1] = av_make_q(
1964 round(mastering_meta->r_y * chroma_den), chroma_den);
1965 metadata->display_primaries[1][0] = av_make_q(
1966 round(mastering_meta->g_x * chroma_den), chroma_den);
1967 metadata->display_primaries[1][1] = av_make_q(
1968 round(mastering_meta->g_y * chroma_den), chroma_den);
1969 metadata->display_primaries[2][0] = av_make_q(
1970 round(mastering_meta->b_x * chroma_den), chroma_den);
1971 metadata->display_primaries[2][1] = av_make_q(
1972 round(mastering_meta->b_y * chroma_den), chroma_den);
1973 metadata->white_point[0] = av_make_q(
1974 round(mastering_meta->white_x * chroma_den), chroma_den);
1975 metadata->white_point[1] = av_make_q(
1976 round(mastering_meta->white_y * chroma_den), chroma_den);
1977 metadata->has_primaries = 1;
1979 if (has_mastering_luminance) {
1980 metadata->max_luminance = av_make_q(
1981 round(mastering_meta->max_luminance * luma_den), luma_den);
1982 metadata->min_luminance = av_make_q(
1983 round(mastering_meta->min_luminance * luma_den), luma_den);
1984 metadata->has_luminance = 1;
1990 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1991 AVSphericalMapping *spherical;
1992 enum AVSphericalProjection projection;
1993 size_t spherical_size;
1994 uint32_t l = 0, t = 0, r = 0, b = 0;
1995 uint32_t padding = 0;
1999 bytestream2_init(&gb, track->video.projection.private.data,
2000 track->video.projection.private.size);
2002 if (bytestream2_get_byte(&gb) != 0) {
2003 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2007 bytestream2_skip(&gb, 3); // flags
2009 switch (track->video.projection.type) {
2010 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2011 if (track->video.projection.private.size == 20) {
2012 t = bytestream2_get_be32(&gb);
2013 b = bytestream2_get_be32(&gb);
2014 l = bytestream2_get_be32(&gb);
2015 r = bytestream2_get_be32(&gb);
2017 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2018 av_log(NULL, AV_LOG_ERROR,
2019 "Invalid bounding rectangle coordinates "
2020 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2022 return AVERROR_INVALIDDATA;
2024 } else if (track->video.projection.private.size != 0) {
2025 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2026 return AVERROR_INVALIDDATA;
2029 if (l || t || r || b)
2030 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2032 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2034 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2035 if (track->video.projection.private.size < 4) {
2036 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2037 return AVERROR_INVALIDDATA;
2038 } else if (track->video.projection.private.size == 12) {
2039 uint32_t layout = bytestream2_get_be32(&gb);
2041 av_log(NULL, AV_LOG_WARNING,
2042 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2045 projection = AV_SPHERICAL_CUBEMAP;
2046 padding = bytestream2_get_be32(&gb);
2048 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2049 return AVERROR_INVALIDDATA;
2052 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2053 /* No Spherical metadata */
2056 av_log(NULL, AV_LOG_WARNING,
2057 "Unknown spherical metadata type %"PRIu64"\n",
2058 track->video.projection.type);
2062 spherical = av_spherical_alloc(&spherical_size);
2064 return AVERROR(ENOMEM);
2066 spherical->projection = projection;
2068 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2069 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2070 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2072 spherical->padding = padding;
2074 spherical->bound_left = l;
2075 spherical->bound_top = t;
2076 spherical->bound_right = r;
2077 spherical->bound_bottom = b;
2079 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2082 av_freep(&spherical);
2089 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2091 const AVCodecTag *codec_tags;
2093 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2094 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2096 /* Normalize noncompliant private data that starts with the fourcc
2097 * by expanding/shifting the data by 4 bytes and storing the data
2098 * size at the start. */
2099 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2100 int ret = av_buffer_realloc(&track->codec_priv.buf,
2101 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2105 track->codec_priv.data = track->codec_priv.buf->data;
2106 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2107 track->codec_priv.size += 4;
2108 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2111 *fourcc = AV_RL32(track->codec_priv.data + 4);
2112 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2117 static int matroska_parse_tracks(AVFormatContext *s)
2119 MatroskaDemuxContext *matroska = s->priv_data;
2120 MatroskaTrack *tracks = matroska->tracks.elem;
2125 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2126 MatroskaTrack *track = &tracks[i];
2127 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2128 EbmlList *encodings_list = &track->encodings;
2129 MatroskaTrackEncoding *encodings = encodings_list->elem;
2130 uint8_t *extradata = NULL;
2131 int extradata_size = 0;
2132 int extradata_offset = 0;
2133 uint32_t fourcc = 0;
2135 char* key_id_base64 = NULL;
2138 /* Apply some sanity checks. */
2139 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2140 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2141 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2142 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2143 av_log(matroska->ctx, AV_LOG_INFO,
2144 "Unknown or unsupported track type %"PRIu64"\n",
2148 if (!track->codec_id)
2151 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2152 isnan(track->audio.samplerate)) {
2153 av_log(matroska->ctx, AV_LOG_WARNING,
2154 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2155 track->audio.samplerate);
2156 track->audio.samplerate = 8000;
2159 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2160 if (!track->default_duration && track->video.frame_rate > 0) {
2161 double default_duration = 1000000000 / track->video.frame_rate;
2162 if (default_duration > UINT64_MAX || default_duration < 0) {
2163 av_log(matroska->ctx, AV_LOG_WARNING,
2164 "Invalid frame rate %e. Cannot calculate default duration.\n",
2165 track->video.frame_rate);
2167 track->default_duration = default_duration;
2170 if (track->video.display_width == -1)
2171 track->video.display_width = track->video.pixel_width;
2172 if (track->video.display_height == -1)
2173 track->video.display_height = track->video.pixel_height;
2174 if (track->video.color_space.size == 4)
2175 fourcc = AV_RL32(track->video.color_space.data);
2176 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2177 if (!track->audio.out_samplerate)
2178 track->audio.out_samplerate = track->audio.samplerate;
2180 if (encodings_list->nb_elem > 1) {
2181 av_log(matroska->ctx, AV_LOG_ERROR,
2182 "Multiple combined encodings not supported");
2183 } else if (encodings_list->nb_elem == 1) {
2184 if (encodings[0].type) {
2185 if (encodings[0].encryption.key_id.size > 0) {
2186 /* Save the encryption key id to be stored later as a
2188 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2189 key_id_base64 = av_malloc(b64_size);
2190 if (key_id_base64 == NULL)
2191 return AVERROR(ENOMEM);
2193 av_base64_encode(key_id_base64, b64_size,
2194 encodings[0].encryption.key_id.data,
2195 encodings[0].encryption.key_id.size);
2197 encodings[0].scope = 0;
2198 av_log(matroska->ctx, AV_LOG_ERROR,
2199 "Unsupported encoding type");
2203 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2206 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2209 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2211 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2212 encodings[0].scope = 0;
2213 av_log(matroska->ctx, AV_LOG_ERROR,
2214 "Unsupported encoding type");
2215 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2216 uint8_t *codec_priv = track->codec_priv.data;
2217 int ret = matroska_decode_buffer(&track->codec_priv.data,
2218 &track->codec_priv.size,
2221 track->codec_priv.data = NULL;
2222 track->codec_priv.size = 0;
2223 av_log(matroska->ctx, AV_LOG_ERROR,
2224 "Failed to decode codec private data\n");
2227 if (codec_priv != track->codec_priv.data) {
2228 av_buffer_unref(&track->codec_priv.buf);
2229 if (track->codec_priv.data) {
2230 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2231 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2233 if (!track->codec_priv.buf) {
2234 av_freep(&track->codec_priv.data);
2235 track->codec_priv.size = 0;
2236 return AVERROR(ENOMEM);
2243 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2244 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2245 strlen(ff_mkv_codec_tags[j].str))) {
2246 codec_id = ff_mkv_codec_tags[j].id;
2251 st = track->stream = avformat_new_stream(s, NULL);
2253 av_free(key_id_base64);
2254 return AVERROR(ENOMEM);
2257 if (key_id_base64) {
2258 /* export encryption key id as base64 metadata tag */
2259 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2260 av_freep(&key_id_base64);
2263 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2264 track->codec_priv.size >= 40 &&
2265 track->codec_priv.data) {
2266 track->ms_compat = 1;
2267 bit_depth = AV_RL16(track->codec_priv.data + 14);
2268 fourcc = AV_RL32(track->codec_priv.data + 16);
2269 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2272 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2274 extradata_offset = 40;
2275 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2276 track->codec_priv.size >= 14 &&
2277 track->codec_priv.data) {
2279 ffio_init_context(&b, track->codec_priv.data,
2280 track->codec_priv.size,
2281 0, NULL, NULL, NULL, NULL);
2282 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2285 codec_id = st->codecpar->codec_id;
2286 fourcc = st->codecpar->codec_tag;
2287 extradata_offset = FFMIN(track->codec_priv.size, 18);
2288 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2289 /* Normally 36, but allow noncompliant private data */
2290 && (track->codec_priv.size >= 32)
2291 && (track->codec_priv.data)) {
2292 uint16_t sample_size;
2293 int ret = get_qt_codec(track, &fourcc, &codec_id);
2296 sample_size = AV_RB16(track->codec_priv.data + 26);
2298 if (sample_size == 8) {
2299 fourcc = MKTAG('r','a','w',' ');
2300 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2301 } else if (sample_size == 16) {
2302 fourcc = MKTAG('t','w','o','s');
2303 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2306 if ((fourcc == MKTAG('t','w','o','s') ||
2307 fourcc == MKTAG('s','o','w','t')) &&
2309 codec_id = AV_CODEC_ID_PCM_S8;
2310 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2311 (track->codec_priv.size >= 21) &&
2312 (track->codec_priv.data)) {
2313 int ret = get_qt_codec(track, &fourcc, &codec_id);
2316 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2317 fourcc = MKTAG('S','V','Q','3');
2318 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2320 if (codec_id == AV_CODEC_ID_NONE)
2321 av_log(matroska->ctx, AV_LOG_ERROR,
2322 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2323 if (track->codec_priv.size >= 86) {
2324 bit_depth = AV_RB16(track->codec_priv.data + 82);
2325 ffio_init_context(&b, track->codec_priv.data,
2326 track->codec_priv.size,
2327 0, NULL, NULL, NULL, NULL);
2328 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2330 track->has_palette = 1;
2333 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2334 switch (track->audio.bitdepth) {
2336 codec_id = AV_CODEC_ID_PCM_U8;
2339 codec_id = AV_CODEC_ID_PCM_S24BE;
2342 codec_id = AV_CODEC_ID_PCM_S32BE;
2345 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2346 switch (track->audio.bitdepth) {
2348 codec_id = AV_CODEC_ID_PCM_U8;
2351 codec_id = AV_CODEC_ID_PCM_S24LE;
2354 codec_id = AV_CODEC_ID_PCM_S32LE;
2357 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2358 track->audio.bitdepth == 64) {
2359 codec_id = AV_CODEC_ID_PCM_F64LE;
2360 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2361 int profile = matroska_aac_profile(track->codec_id);
2362 int sri = matroska_aac_sri(track->audio.samplerate);
2363 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2365 return AVERROR(ENOMEM);
2366 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2367 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2368 if (strstr(track->codec_id, "SBR")) {
2369 sri = matroska_aac_sri(track->audio.out_samplerate);
2370 extradata[2] = 0x56;
2371 extradata[3] = 0xE5;
2372 extradata[4] = 0x80 | (sri << 3);
2376 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2377 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2378 * Create the "atom size", "tag", and "tag version" fields the
2379 * decoder expects manually. */
2380 extradata_size = 12 + track->codec_priv.size;
2381 extradata = av_mallocz(extradata_size +
2382 AV_INPUT_BUFFER_PADDING_SIZE);
2384 return AVERROR(ENOMEM);
2385 AV_WB32(extradata, extradata_size);
2386 memcpy(&extradata[4], "alac", 4);
2387 AV_WB32(&extradata[8], 0);
2388 memcpy(&extradata[12], track->codec_priv.data,
2389 track->codec_priv.size);
2390 } else if (codec_id == AV_CODEC_ID_TTA) {
2391 extradata_size = 30;
2392 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2394 return AVERROR(ENOMEM);
2395 ffio_init_context(&b, extradata, extradata_size, 1,
2396 NULL, NULL, NULL, NULL);
2397 avio_write(&b, "TTA1", 4);
2399 if (track->audio.channels > UINT16_MAX ||
2400 track->audio.bitdepth > UINT16_MAX) {
2401 av_log(matroska->ctx, AV_LOG_WARNING,
2402 "Too large audio channel number %"PRIu64
2403 " or bitdepth %"PRIu64". Skipping track.\n",
2404 track->audio.channels, track->audio.bitdepth);
2405 av_freep(&extradata);
2406 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2407 return AVERROR_INVALIDDATA;
2411 avio_wl16(&b, track->audio.channels);
2412 avio_wl16(&b, track->audio.bitdepth);
2413 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2414 return AVERROR_INVALIDDATA;
2415 avio_wl32(&b, track->audio.out_samplerate);
2416 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2417 track->audio.out_samplerate,
2418 AV_TIME_BASE * 1000));
2419 } else if (codec_id == AV_CODEC_ID_RV10 ||
2420 codec_id == AV_CODEC_ID_RV20 ||
2421 codec_id == AV_CODEC_ID_RV30 ||
2422 codec_id == AV_CODEC_ID_RV40) {
2423 extradata_offset = 26;
2424 } else if (codec_id == AV_CODEC_ID_RA_144) {
2425 track->audio.out_samplerate = 8000;
2426 track->audio.channels = 1;
2427 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2428 codec_id == AV_CODEC_ID_COOK ||
2429 codec_id == AV_CODEC_ID_ATRAC3 ||
2430 codec_id == AV_CODEC_ID_SIPR)
2431 && track->codec_priv.data) {
2434 ffio_init_context(&b, track->codec_priv.data,
2435 track->codec_priv.size,
2436 0, NULL, NULL, NULL, NULL);
2438 flavor = avio_rb16(&b);
2439 track->audio.coded_framesize = avio_rb32(&b);
2441 track->audio.sub_packet_h = avio_rb16(&b);
2442 track->audio.frame_size = avio_rb16(&b);
2443 track->audio.sub_packet_size = avio_rb16(&b);
2445 track->audio.coded_framesize <= 0 ||
2446 track->audio.sub_packet_h <= 0 ||
2447 track->audio.frame_size <= 0 ||
2448 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2449 return AVERROR_INVALIDDATA;
2450 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2451 track->audio.frame_size);
2452 if (!track->audio.buf)
2453 return AVERROR(ENOMEM);
2454 if (codec_id == AV_CODEC_ID_RA_288) {
2455 st->codecpar->block_align = track->audio.coded_framesize;
2456 track->codec_priv.size = 0;
2458 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2459 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2460 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2461 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2463 st->codecpar->block_align = track->audio.sub_packet_size;
2464 extradata_offset = 78;
2466 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2467 ret = matroska_parse_flac(s, track, &extradata_offset);
2470 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2471 fourcc = AV_RL32(track->codec_priv.data);
2472 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2473 /* we don't need any value stored in CodecPrivate.
2474 make sure that it's not exported as extradata. */
2475 track->codec_priv.size = 0;
2476 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2477 /* For now, propagate only the OBUs, if any. Once libavcodec is
2478 updated to handle isobmff style extradata this can be removed. */
2479 extradata_offset = 4;
2481 track->codec_priv.size -= extradata_offset;
2483 if (codec_id == AV_CODEC_ID_NONE)
2484 av_log(matroska->ctx, AV_LOG_INFO,
2485 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2487 if (track->time_scale < 0.01)
2488 track->time_scale = 1.0;
2489 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2490 1000 * 1000 * 1000); /* 64 bit pts in ns */
2492 /* convert the delay from ns to the track timebase */
2493 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2494 (AVRational){ 1, 1000000000 },
2497 st->codecpar->codec_id = codec_id;
2499 if (strcmp(track->language, "und"))
2500 av_dict_set(&st->metadata, "language", track->language, 0);
2501 av_dict_set(&st->metadata, "title", track->name, 0);
2503 if (track->flag_default)
2504 st->disposition |= AV_DISPOSITION_DEFAULT;
2505 if (track->flag_forced)
2506 st->disposition |= AV_DISPOSITION_FORCED;
2508 if (!st->codecpar->extradata) {
2510 st->codecpar->extradata = extradata;
2511 st->codecpar->extradata_size = extradata_size;
2512 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2513 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2514 return AVERROR(ENOMEM);
2515 memcpy(st->codecpar->extradata,
2516 track->codec_priv.data + extradata_offset,
2517 track->codec_priv.size);
2521 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2522 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2523 int display_width_mul = 1;
2524 int display_height_mul = 1;
2526 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2527 st->codecpar->codec_tag = fourcc;
2529 st->codecpar->bits_per_coded_sample = bit_depth;
2530 st->codecpar->width = track->video.pixel_width;
2531 st->codecpar->height = track->video.pixel_height;
2533 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2534 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2535 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2536 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2538 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2539 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2541 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2542 av_reduce(&st->sample_aspect_ratio.num,
2543 &st->sample_aspect_ratio.den,
2544 st->codecpar->height * track->video.display_width * display_width_mul,
2545 st->codecpar->width * track->video.display_height * display_height_mul,
2548 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2549 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2551 if (track->default_duration) {
2552 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2553 1000000000, track->default_duration, 30000);
2554 #if FF_API_R_FRAME_RATE
2555 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2556 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2557 st->r_frame_rate = st->avg_frame_rate;
2561 /* export stereo mode flag as metadata tag */
2562 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2563 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2565 /* export alpha mode flag as metadata tag */
2566 if (track->video.alpha_mode)
2567 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2569 /* if we have virtual track, mark the real tracks */
2570 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2572 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2574 snprintf(buf, sizeof(buf), "%s_%d",
2575 ff_matroska_video_stereo_plane[planes[j].type], i);
2576 for (k=0; k < matroska->tracks.nb_elem; k++)
2577 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2578 av_dict_set(&tracks[k].stream->metadata,
2579 "stereo_mode", buf, 0);
2583 // add stream level stereo3d side data if it is a supported format
2584 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2585 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2586 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2591 ret = mkv_parse_video_color(st, track);
2594 ret = mkv_parse_video_projection(st, track);
2597 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2598 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2599 st->codecpar->codec_tag = fourcc;
2600 st->codecpar->sample_rate = track->audio.out_samplerate;
2601 st->codecpar->channels = track->audio.channels;
2602 if (!st->codecpar->bits_per_coded_sample)
2603 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2604 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2605 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2606 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2607 st->need_parsing = AVSTREAM_PARSE_FULL;
2608 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2609 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2610 if (track->codec_delay > 0) {
2611 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2612 (AVRational){1, 1000000000},
2613 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2614 48000 : st->codecpar->sample_rate});
2616 if (track->seek_preroll > 0) {
2617 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2618 (AVRational){1, 1000000000},
2619 (AVRational){1, st->codecpar->sample_rate});
2621 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2622 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2624 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2625 st->disposition |= AV_DISPOSITION_CAPTIONS;
2626 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2627 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2628 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2629 st->disposition |= AV_DISPOSITION_METADATA;
2631 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2632 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2639 static int matroska_read_header(AVFormatContext *s)
2641 MatroskaDemuxContext *matroska = s->priv_data;
2642 EbmlList *attachments_list = &matroska->attachments;
2643 EbmlList *chapters_list = &matroska->chapters;
2644 MatroskaAttachment *attachments;
2645 MatroskaChapter *chapters;
2646 uint64_t max_start = 0;
2652 matroska->cues_parsing_deferred = 1;
2654 /* First read the EBML header. */
2655 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2656 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2657 ebml_free(ebml_syntax, &ebml);
2658 return AVERROR_INVALIDDATA;
2660 if (ebml.version > EBML_VERSION ||
2661 ebml.max_size > sizeof(uint64_t) ||
2662 ebml.id_length > sizeof(uint32_t) ||
2663 ebml.doctype_version > 3) {
2664 avpriv_report_missing_feature(matroska->ctx,
2665 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2666 ebml.version, ebml.doctype, ebml.doctype_version);
2667 ebml_free(ebml_syntax, &ebml);
2668 return AVERROR_PATCHWELCOME;
2669 } else if (ebml.doctype_version == 3) {
2670 av_log(matroska->ctx, AV_LOG_WARNING,
2671 "EBML header using unsupported features\n"
2672 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2673 ebml.version, ebml.doctype, ebml.doctype_version);
2675 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2676 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2678 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2679 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2680 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2681 ebml_free(ebml_syntax, &ebml);
2682 return AVERROR_INVALIDDATA;
2685 ebml_free(ebml_syntax, &ebml);
2687 /* The next thing is a segment. */
2688 pos = avio_tell(matroska->ctx->pb);
2689 res = ebml_parse(matroska, matroska_segments, matroska);
2690 // try resyncing until we find a EBML_STOP type element.
2692 res = matroska_resync(matroska, pos);
2695 pos = avio_tell(matroska->ctx->pb);
2696 res = ebml_parse(matroska, matroska_segment, matroska);
2698 /* Set data_offset as it might be needed later by seek_frame_generic. */
2699 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2700 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2701 matroska_execute_seekhead(matroska);
2703 if (!matroska->time_scale)
2704 matroska->time_scale = 1000000;
2705 if (matroska->duration)
2706 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2707 1000 / AV_TIME_BASE;
2708 av_dict_set(&s->metadata, "title", matroska->title, 0);
2709 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2711 if (matroska->date_utc.size == 8)
2712 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2714 res = matroska_parse_tracks(s);
2718 attachments = attachments_list->elem;
2719 for (j = 0; j < attachments_list->nb_elem; j++) {
2720 if (!(attachments[j].filename && attachments[j].mime &&
2721 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2722 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2724 AVStream *st = avformat_new_stream(s, NULL);
2727 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2728 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2729 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2731 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2732 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2733 strlen(ff_mkv_image_mime_tags[i].str))) {
2734 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2739 attachments[j].stream = st;
2741 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2742 AVPacket *pkt = &st->attached_pic;
2744 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2745 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2747 av_init_packet(pkt);
2748 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2750 return AVERROR(ENOMEM);
2751 pkt->data = attachments[j].bin.data;
2752 pkt->size = attachments[j].bin.size;
2753 pkt->stream_index = st->index;
2754 pkt->flags |= AV_PKT_FLAG_KEY;
2756 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2757 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2759 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2760 attachments[j].bin.size);
2762 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2763 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2764 strlen(ff_mkv_mime_tags[i].str))) {
2765 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2773 chapters = chapters_list->elem;
2774 for (i = 0; i < chapters_list->nb_elem; i++)
2775 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2776 (max_start == 0 || chapters[i].start > max_start)) {
2777 chapters[i].chapter =
2778 avpriv_new_chapter(s, chapters[i].uid,
2779 (AVRational) { 1, 1000000000 },
2780 chapters[i].start, chapters[i].end,
2782 if (chapters[i].chapter) {
2783 av_dict_set(&chapters[i].chapter->metadata,
2784 "title", chapters[i].title, 0);
2786 max_start = chapters[i].start;
2789 matroska_add_index_entries(matroska);
2791 matroska_convert_tags(s);
2795 matroska_read_close(s);
2800 * Put one packet in an application-supplied AVPacket struct.
2801 * Returns 0 on success or -1 on failure.
2803 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2806 if (matroska->queue) {
2807 MatroskaTrack *tracks = matroska->tracks.elem;
2808 MatroskaTrack *track;
2810 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2811 track = &tracks[pkt->stream_index];
2812 if (track->has_palette) {
2813 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2815 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2817 memcpy(pal, track->palette, AVPALETTE_SIZE);
2819 track->has_palette = 0;
2828 * Free all packets in our internal queue.
2830 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2832 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2835 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2836 int *buf_size, int type,
2837 uint32_t **lace_buf, int *laces)
2839 int res = 0, n, size = *buf_size;
2840 uint8_t *data = *buf;
2841 uint32_t *lace_size;
2845 *lace_buf = av_malloc(sizeof(**lace_buf));
2847 return AVERROR(ENOMEM);
2849 *lace_buf[0] = size;
2853 av_assert0(size > 0);
2857 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2859 return AVERROR(ENOMEM);
2862 case 0x1: /* Xiph lacing */
2866 for (n = 0; res == 0 && n < *laces - 1; n++) {
2870 if (size <= total) {
2871 res = AVERROR_INVALIDDATA;
2876 lace_size[n] += temp;
2883 if (size <= total) {
2884 res = AVERROR_INVALIDDATA;
2888 lace_size[n] = size - total;
2892 case 0x2: /* fixed-size lacing */
2893 if (size % (*laces)) {
2894 res = AVERROR_INVALIDDATA;
2897 for (n = 0; n < *laces; n++)
2898 lace_size[n] = size / *laces;
2901 case 0x3: /* EBML lacing */
2905 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2906 if (n < 0 || num > INT_MAX) {
2907 av_log(matroska->ctx, AV_LOG_INFO,
2908 "EBML block data error\n");
2909 res = n<0 ? n : AVERROR_INVALIDDATA;
2914 total = lace_size[0] = num;
2915 for (n = 1; res == 0 && n < *laces - 1; n++) {
2918 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2919 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2920 av_log(matroska->ctx, AV_LOG_INFO,
2921 "EBML block data error\n");
2922 res = r<0 ? r : AVERROR_INVALIDDATA;
2927 lace_size[n] = lace_size[n - 1] + snum;
2928 total += lace_size[n];
2930 if (size <= total) {
2931 res = AVERROR_INVALIDDATA;
2934 lace_size[*laces - 1] = size - total;
2940 *lace_buf = lace_size;
2946 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2947 MatroskaTrack *track, AVStream *st,
2948 uint8_t *data, int size, uint64_t timecode,
2951 int a = st->codecpar->block_align;
2952 int sps = track->audio.sub_packet_size;
2953 int cfs = track->audio.coded_framesize;
2954 int h = track->audio.sub_packet_h;
2955 int y = track->audio.sub_packet_cnt;
2956 int w = track->audio.frame_size;
2959 if (!track->audio.pkt_cnt) {
2960 if (track->audio.sub_packet_cnt == 0)
2961 track->audio.buf_timecode = timecode;
2962 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2963 if (size < cfs * h / 2) {
2964 av_log(matroska->ctx, AV_LOG_ERROR,
2965 "Corrupt int4 RM-style audio packet size\n");
2966 return AVERROR_INVALIDDATA;
2968 for (x = 0; x < h / 2; x++)
2969 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2970 data + x * cfs, cfs);
2971 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2973 av_log(matroska->ctx, AV_LOG_ERROR,
2974 "Corrupt sipr RM-style audio packet size\n");
2975 return AVERROR_INVALIDDATA;
2977 memcpy(track->audio.buf + y * w, data, w);
2979 if (size < sps * w / sps || h<=0 || w%sps) {
2980 av_log(matroska->ctx, AV_LOG_ERROR,
2981 "Corrupt generic RM-style audio packet size\n");
2982 return AVERROR_INVALIDDATA;
2984 for (x = 0; x < w / sps; x++)
2985 memcpy(track->audio.buf +
2986 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2987 data + x * sps, sps);
2990 if (++track->audio.sub_packet_cnt >= h) {
2991 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2992 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2993 track->audio.sub_packet_cnt = 0;
2994 track->audio.pkt_cnt = h * w / a;
2998 while (track->audio.pkt_cnt) {
3000 AVPacket pktl, *pkt = &pktl;
3002 ret = av_new_packet(pkt, a);
3007 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3009 pkt->pts = track->audio.buf_timecode;
3010 track->audio.buf_timecode = AV_NOPTS_VALUE;
3012 pkt->stream_index = st->index;
3013 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3015 av_packet_unref(pkt);
3016 return AVERROR(ENOMEM);
3023 /* reconstruct full wavpack blocks from mangled matroska ones */
3024 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3025 uint8_t **pdst, int *size)
3027 uint8_t *dst = NULL;
3032 int ret, offset = 0;
3034 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3035 return AVERROR_INVALIDDATA;
3037 ver = AV_RL16(track->stream->codecpar->extradata);
3039 samples = AV_RL32(src);
3043 while (srclen >= 8) {
3048 uint32_t flags = AV_RL32(src);
3049 uint32_t crc = AV_RL32(src + 4);
3053 multiblock = (flags & 0x1800) != 0x1800;
3056 ret = AVERROR_INVALIDDATA;
3059 blocksize = AV_RL32(src);
3065 if (blocksize > srclen) {
3066 ret = AVERROR_INVALIDDATA;
3070 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3072 ret = AVERROR(ENOMEM);
3076 dstlen += blocksize + 32;
3078 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3079 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3080 AV_WL16(dst + offset + 8, ver); // version
3081 AV_WL16(dst + offset + 10, 0); // track/index_no
3082 AV_WL32(dst + offset + 12, 0); // total samples
3083 AV_WL32(dst + offset + 16, 0); // block index
3084 AV_WL32(dst + offset + 20, samples); // number of samples
3085 AV_WL32(dst + offset + 24, flags); // flags
3086 AV_WL32(dst + offset + 28, crc); // crc
3087 memcpy(dst + offset + 32, src, blocksize); // block data
3090 srclen -= blocksize;
3091 offset += blocksize + 32;
3094 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3106 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3107 uint8_t **pdst, int *size)
3112 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3113 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3115 return AVERROR(ENOMEM);
3117 AV_WB32(dst, dstlen);
3118 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3119 memcpy(dst + 8, src, dstlen);
3120 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3130 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3131 MatroskaTrack *track,
3133 uint8_t *data, int data_len,
3138 AVPacket pktl, *pkt = &pktl;
3139 uint8_t *id, *settings, *text, *buf;
3140 int id_len, settings_len, text_len;
3145 return AVERROR_INVALIDDATA;
3148 q = data + data_len;
3153 if (*p == '\r' || *p == '\n') {
3162 if (p >= q || *p != '\n')
3163 return AVERROR_INVALIDDATA;
3169 if (*p == '\r' || *p == '\n') {
3170 settings_len = p - settings;
3178 if (p >= q || *p != '\n')
3179 return AVERROR_INVALIDDATA;
3184 while (text_len > 0) {
3185 const int len = text_len - 1;
3186 const uint8_t c = p[len];
3187 if (c != '\r' && c != '\n')
3193 return AVERROR_INVALIDDATA;
3195 err = av_new_packet(pkt, text_len);
3200 memcpy(pkt->data, text, text_len);
3203 buf = av_packet_new_side_data(pkt,
3204 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3207 av_packet_unref(pkt);
3208 return AVERROR(ENOMEM);
3210 memcpy(buf, id, id_len);
3213 if (settings_len > 0) {
3214 buf = av_packet_new_side_data(pkt,
3215 AV_PKT_DATA_WEBVTT_SETTINGS,
3218 av_packet_unref(pkt);
3219 return AVERROR(ENOMEM);
3221 memcpy(buf, settings, settings_len);
3224 // Do we need this for subtitles?
3225 // pkt->flags = AV_PKT_FLAG_KEY;
3227 pkt->stream_index = st->index;
3228 pkt->pts = timecode;
3230 // Do we need this for subtitles?
3231 // pkt->dts = timecode;
3233 pkt->duration = duration;
3236 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3238 av_packet_unref(pkt);
3239 return AVERROR(ENOMEM);
3245 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3246 MatroskaTrack *track, AVStream *st,
3247 AVBufferRef *buf, uint8_t *data, int pkt_size,
3248 uint64_t timecode, uint64_t lace_duration,
3249 int64_t pos, int is_keyframe,
3250 uint8_t *additional, uint64_t additional_id, int additional_size,
3251 int64_t discard_padding)
3253 MatroskaTrackEncoding *encodings = track->encodings.elem;
3254 uint8_t *pkt_data = data;
3256 AVPacket pktl, *pkt = &pktl;
3258 if (encodings && !encodings->type && encodings->scope & 1) {
3259 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3264 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3266 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3268 av_log(matroska->ctx, AV_LOG_ERROR,
3269 "Error parsing a wavpack block.\n");
3272 if (pkt_data != data)
3273 av_freep(&pkt_data);
3277 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3279 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3281 av_log(matroska->ctx, AV_LOG_ERROR,
3282 "Error parsing a prores block.\n");
3285 if (pkt_data != data)
3286 av_freep(&pkt_data);
3290 av_init_packet(pkt);
3291 if (pkt_data != data)
3292 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3295 pkt->buf = av_buffer_ref(buf);
3298 res = AVERROR(ENOMEM);
3302 pkt->data = pkt_data;
3303 pkt->size = pkt_size;
3304 pkt->flags = is_keyframe;
3305 pkt->stream_index = st->index;
3307 if (additional_size > 0) {
3308 uint8_t *side_data = av_packet_new_side_data(pkt,
3309 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3310 additional_size + 8);
3312 av_packet_unref(pkt);
3313 return AVERROR(ENOMEM);
3315 AV_WB64(side_data, additional_id);
3316 memcpy(side_data + 8, additional, additional_size);
3319 if (discard_padding) {
3320 uint8_t *side_data = av_packet_new_side_data(pkt,
3321 AV_PKT_DATA_SKIP_SAMPLES,
3324 av_packet_unref(pkt);
3325 return AVERROR(ENOMEM);
3327 discard_padding = av_rescale_q(discard_padding,
3328 (AVRational){1, 1000000000},
3329 (AVRational){1, st->codecpar->sample_rate});
3330 if (discard_padding > 0) {
3331 AV_WL32(side_data + 4, discard_padding);
3333 AV_WL32(side_data, -discard_padding);
3337 if (track->ms_compat)
3338 pkt->dts = timecode;
3340 pkt->pts = timecode;
3342 pkt->duration = lace_duration;
3344 #if FF_API_CONVERGENCE_DURATION
3345 FF_DISABLE_DEPRECATION_WARNINGS
3346 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3347 pkt->convergence_duration = lace_duration;
3349 FF_ENABLE_DEPRECATION_WARNINGS
3352 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3354 av_packet_unref(pkt);
3355 return AVERROR(ENOMEM);
3361 if (pkt_data != data)
3362 av_freep(&pkt_data);
3366 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3367 int size, int64_t pos, uint64_t cluster_time,
3368 uint64_t block_duration, int is_keyframe,
3369 uint8_t *additional, uint64_t additional_id, int additional_size,
3370 int64_t cluster_pos, int64_t discard_padding)
3372 uint64_t timecode = AV_NOPTS_VALUE;
3373 MatroskaTrack *track;
3377 uint32_t *lace_size = NULL;
3378 int n, flags, laces = 0;
3380 int trust_default_duration = 1;
3382 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3388 track = matroska_find_track_by_num(matroska, num);
3389 if (!track || !track->stream) {
3390 av_log(matroska->ctx, AV_LOG_INFO,
3391 "Invalid stream %"PRIu64"\n", num);
3392 return AVERROR_INVALIDDATA;
3393 } else if (size <= 3)
3396 if (st->discard >= AVDISCARD_ALL)
3398 av_assert1(block_duration != AV_NOPTS_VALUE);
3400 block_time = sign_extend(AV_RB16(data), 16);
3404 if (is_keyframe == -1)
3405 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3407 if (cluster_time != (uint64_t) -1 &&
3408 (block_time >= 0 || cluster_time >= -block_time)) {
3409 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3410 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3411 timecode < track->end_timecode)
3412 is_keyframe = 0; /* overlapping subtitles are not key frame */
3414 ff_reduce_index(matroska->ctx, st->index);
3415 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3420 if (matroska->skip_to_keyframe &&
3421 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3422 // Compare signed timecodes. Timecode may be negative due to codec delay
3423 // offset. We don't support timestamps greater than int64_t anyway - see
3425 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3428 matroska->skip_to_keyframe = 0;
3429 else if (!st->skip_to_keyframe) {
3430 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3431 matroska->skip_to_keyframe = 0;
3435 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3436 &lace_size, &laces);
3441 if (track->audio.samplerate == 8000) {
3442 // If this is needed for more codecs, then add them here
3443 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3444 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3445 trust_default_duration = 0;
3449 if (!block_duration && trust_default_duration)
3450 block_duration = track->default_duration * laces / matroska->time_scale;
3452 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3453 track->end_timecode =
3454 FFMAX(track->end_timecode, timecode + block_duration);
3456 for (n = 0; n < laces; n++) {
3457 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3459 if (lace_size[n] > size) {
3460 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3464 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3465 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3466 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3467 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3468 st->codecpar->block_align && track->audio.sub_packet_size) {
3469 res = matroska_parse_rm_audio(matroska, track, st, data,
3475 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3476 res = matroska_parse_webvtt(matroska, track, st,
3478 timecode, lace_duration,
3483 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3484 timecode, lace_duration, pos,
3485 !n ? is_keyframe : 0,
3486 additional, additional_id, additional_size,
3492 if (timecode != AV_NOPTS_VALUE)
3493 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3494 data += lace_size[n];
3495 size -= lace_size[n];
3503 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3505 MatroskaCluster *cluster = &matroska->current_cluster;
3506 MatroskaBlock *block = &cluster->block;
3508 res = ebml_parse(matroska,
3509 matroska_cluster_parsing,
3514 ebml_level_end(matroska);
3515 cluster->pos = avio_tell(matroska->ctx->pb);
3516 /* sizeof the ID which was already read */
3517 if (matroska->current_id)
3519 res = ebml_parse(matroska,
3522 /* Try parsing the block again. */
3524 res = ebml_parse(matroska,
3525 matroska_cluster_parsing,
3529 if (!res && block->bin.size > 0) {
3530 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3531 uint8_t* additional = block->additional.size > 0 ?
3532 block->additional.data : NULL;
3534 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3535 block->bin.size, block->bin.pos,
3536 matroska->current_cluster.timecode,
3537 block->duration, is_keyframe,
3538 additional, block->additional_id,
3539 block->additional.size,
3541 block->discard_padding);
3544 ebml_free(matroska_blockgroup, block);
3545 memset(block, 0, sizeof(*block));
3550 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3552 MatroskaDemuxContext *matroska = s->priv_data;
3555 while (matroska_deliver_packet(matroska, pkt)) {
3556 int64_t pos = avio_tell(matroska->ctx->pb);
3558 return (ret < 0) ? ret : AVERROR_EOF;
3559 if (matroska_parse_cluster(matroska) < 0)
3560 ret = matroska_resync(matroska, pos);
3566 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3567 int64_t timestamp, int flags)
3569 MatroskaDemuxContext *matroska = s->priv_data;
3570 MatroskaTrack *tracks = NULL;
3571 AVStream *st = s->streams[stream_index];
3574 /* Parse the CUES now since we need the index data to seek. */
3575 if (matroska->cues_parsing_deferred > 0) {
3576 matroska->cues_parsing_deferred = 0;
3577 matroska_parse_cues(matroska);
3580 if (!st->nb_index_entries)
3582 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3584 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3585 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3587 matroska->current_id = 0;
3588 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3589 matroska_clear_queue(matroska);
3590 if (matroska_parse_cluster(matroska) < 0)
3595 matroska_clear_queue(matroska);
3596 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3599 tracks = matroska->tracks.elem;
3600 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3601 tracks[i].audio.pkt_cnt = 0;
3602 tracks[i].audio.sub_packet_cnt = 0;
3603 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3604 tracks[i].end_timecode = 0;
3607 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
3608 matroska->current_id = 0;
3609 if (flags & AVSEEK_FLAG_ANY) {
3610 st->skip_to_keyframe = 0;
3611 matroska->skip_to_timecode = timestamp;
3613 st->skip_to_keyframe = 1;
3614 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3616 matroska->skip_to_keyframe = 1;
3618 matroska->num_levels = 0;
3619 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3622 // slightly hackish but allows proper fallback to
3623 // the generic seeking code.
3624 matroska_clear_queue(matroska);
3625 matroska->current_id = 0;
3626 st->skip_to_keyframe =
3627 matroska->skip_to_keyframe = 0;
3629 matroska->num_levels = 0;
3633 static int matroska_read_close(AVFormatContext *s)
3635 MatroskaDemuxContext *matroska = s->priv_data;
3636 MatroskaTrack *tracks = matroska->tracks.elem;
3639 matroska_clear_queue(matroska);
3641 for (n = 0; n < matroska->tracks.nb_elem; n++)
3642 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3643 av_freep(&tracks[n].audio.buf);
3644 ebml_free(matroska_segment, matroska);
3650 int64_t start_time_ns;
3651 int64_t end_time_ns;
3652 int64_t start_offset;
3656 /* This function searches all the Cues and returns the CueDesc corresponding to
3657 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3658 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3660 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3661 MatroskaDemuxContext *matroska = s->priv_data;
3664 int nb_index_entries = s->streams[0]->nb_index_entries;
3665 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3666 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3667 for (i = 1; i < nb_index_entries; i++) {
3668 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3669 index_entries[i].timestamp * matroska->time_scale > ts) {
3674 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3675 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3676 if (i != nb_index_entries - 1) {
3677 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3678 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3680 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3681 // FIXME: this needs special handling for files where Cues appear
3682 // before Clusters. the current logic assumes Cues appear after
3684 cue_desc.end_offset = cues_start - matroska->segment_start;
3689 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3691 MatroskaDemuxContext *matroska = s->priv_data;
3692 int64_t cluster_pos, before_pos;
3694 if (s->streams[0]->nb_index_entries <= 0) return 0;
3695 // seek to the first cluster using cues.
3696 index = av_index_search_timestamp(s->streams[0], 0, 0);
3697 if (index < 0) return 0;
3698 cluster_pos = s->streams[0]->index_entries[index].pos;
3699 before_pos = avio_tell(s->pb);
3701 uint64_t cluster_id, cluster_length;
3704 avio_seek(s->pb, cluster_pos, SEEK_SET);
3705 // read cluster id and length
3706 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3707 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3709 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3712 avio_seek(s->pb, cluster_pos, SEEK_SET);
3713 matroska->current_id = 0;
3714 matroska_clear_queue(matroska);
3715 if (matroska_parse_cluster(matroska) < 0 ||
3719 pkt = &matroska->queue->pkt;
3720 // 4 + read is the length of the cluster id and the cluster length field.
3721 cluster_pos += 4 + read + cluster_length;
3722 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3727 avio_seek(s->pb, before_pos, SEEK_SET);
3731 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3732 double min_buffer, double* buffer,
3733 double* sec_to_download, AVFormatContext *s,
3736 double nano_seconds_per_second = 1000000000.0;
3737 double time_sec = time_ns / nano_seconds_per_second;
3739 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3740 int64_t end_time_ns = time_ns + time_to_search_ns;
3741 double sec_downloaded = 0.0;
3742 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3743 if (desc_curr.start_time_ns == -1)
3745 *sec_to_download = 0.0;
3747 // Check for non cue start time.
3748 if (time_ns > desc_curr.start_time_ns) {
3749 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3750 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3751 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3752 double timeToDownload = (cueBytes * 8.0) / bps;
3754 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3755 *sec_to_download += timeToDownload;
3757 // Check if the search ends within the first cue.
3758 if (desc_curr.end_time_ns >= end_time_ns) {
3759 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3760 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3761 sec_downloaded = percent_to_sub * sec_downloaded;
3762 *sec_to_download = percent_to_sub * *sec_to_download;
3765 if ((sec_downloaded + *buffer) <= min_buffer) {
3769 // Get the next Cue.
3770 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3773 while (desc_curr.start_time_ns != -1) {
3774 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3775 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3776 double desc_sec = desc_ns / nano_seconds_per_second;
3777 double bits = (desc_bytes * 8.0);
3778 double time_to_download = bits / bps;
3780 sec_downloaded += desc_sec - time_to_download;
3781 *sec_to_download += time_to_download;
3783 if (desc_curr.end_time_ns >= end_time_ns) {
3784 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3785 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3786 sec_downloaded = percent_to_sub * sec_downloaded;
3787 *sec_to_download = percent_to_sub * *sec_to_download;
3789 if ((sec_downloaded + *buffer) <= min_buffer)
3794 if ((sec_downloaded + *buffer) <= min_buffer) {
3799 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3801 *buffer = *buffer + sec_downloaded;
3805 /* This function computes the bandwidth of the WebM file with the help of
3806 * buffer_size_after_time_downloaded() function. Both of these functions are
3807 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3808 * Matroska parsing mechanism.
3810 * Returns the bandwidth of the file on success; -1 on error.
3812 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3814 MatroskaDemuxContext *matroska = s->priv_data;
3815 AVStream *st = s->streams[0];
3816 double bandwidth = 0.0;
3819 for (i = 0; i < st->nb_index_entries; i++) {
3820 int64_t prebuffer_ns = 1000000000;
3821 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3822 double nano_seconds_per_second = 1000000000.0;
3823 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3824 double prebuffer_bytes = 0.0;
3825 int64_t temp_prebuffer_ns = prebuffer_ns;
3826 int64_t pre_bytes, pre_ns;
3827 double pre_sec, prebuffer, bits_per_second;
3828 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3830 // Start with the first Cue.
3831 CueDesc desc_end = desc_beg;
3833 // Figure out how much data we have downloaded for the prebuffer. This will
3834 // be used later to adjust the bits per sample to try.
3835 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3836 // Prebuffered the entire Cue.
3837 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3838 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3839 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3841 if (desc_end.start_time_ns == -1) {
3842 // The prebuffer is larger than the duration.
3843 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3845 bits_per_second = 0.0;
3847 // The prebuffer ends in the last Cue. Estimate how much data was
3849 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3850 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3851 pre_sec = pre_ns / nano_seconds_per_second;
3853 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3855 prebuffer = prebuffer_ns / nano_seconds_per_second;
3857 // Set this to 0.0 in case our prebuffer buffers the entire video.
3858 bits_per_second = 0.0;
3860 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3861 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3862 double desc_sec = desc_ns / nano_seconds_per_second;
3863 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3865 // Drop the bps by the percentage of bytes buffered.
3866 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3867 double mod_bits_per_second = calc_bits_per_second * percent;
3869 if (prebuffer < desc_sec) {
3871 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3873 // Add 1 so the bits per second should be a little bit greater than file
3875 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3876 const double min_buffer = 0.0;
3877 double buffer = prebuffer;
3878 double sec_to_download = 0.0;
3880 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3881 min_buffer, &buffer, &sec_to_download,
3885 } else if (rv == 0) {
3886 bits_per_second = (double)(bps);
3891 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3892 } while (desc_end.start_time_ns != -1);
3894 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3896 return (int64_t)bandwidth;
3899 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3901 MatroskaDemuxContext *matroska = s->priv_data;
3902 EbmlList *seekhead_list = &matroska->seekhead;
3903 MatroskaSeekhead *seekhead = seekhead_list->elem;
3905 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3909 // determine cues start and end positions
3910 for (i = 0; i < seekhead_list->nb_elem; i++)
3911 if (seekhead[i].id == MATROSKA_ID_CUES)
3914 if (i >= seekhead_list->nb_elem) return -1;
3916 before_pos = avio_tell(matroska->ctx->pb);
3917 cues_start = seekhead[i].pos + matroska->segment_start;
3918 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3919 // cues_end is computed as cues_start + cues_length + length of the
3920 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3921 // cues_end is inclusive and the above sum is reduced by 1.
3922 uint64_t cues_length, cues_id;
3924 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3925 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3926 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3927 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3930 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3932 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3933 if (cues_start == -1 || cues_end == -1) return -1;
3936 matroska_parse_cues(matroska);
3939 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3942 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3944 // if the file has cues at the start, fix up the init range so tht
3945 // it does not include it
3946 if (cues_start <= init_range)
3947 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3950 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3951 if (bandwidth < 0) return -1;
3952 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3954 // check if all clusters start with key frames
3955 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3957 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3958 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3959 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3960 if (!buf) return -1;
3962 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3963 int ret = snprintf(buf + end, 20,
3964 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3965 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3966 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3967 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3969 return AVERROR_INVALIDDATA;
3973 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3979 static int webm_dash_manifest_read_header(AVFormatContext *s)
3982 int ret = matroska_read_header(s);
3984 MatroskaTrack *tracks;
3985 MatroskaDemuxContext *matroska = s->priv_data;
3987 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3990 if (!s->nb_streams) {
3991 matroska_read_close(s);
3992 av_log(s, AV_LOG_ERROR, "No streams found\n");
3993 return AVERROR_INVALIDDATA;
3996 if (!matroska->is_live) {
3997 buf = av_asprintf("%g", matroska->duration);
3998 if (!buf) return AVERROR(ENOMEM);
3999 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4002 // initialization range
4003 // 5 is the offset of Cluster ID.
4004 init_range = avio_tell(s->pb) - 5;
4005 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4008 // basename of the file
4009 buf = strrchr(s->url, '/');
4010 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4013 tracks = matroska->tracks.elem;
4014 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4016 // parse the cues and populate Cue related fields
4017 if (!matroska->is_live) {
4018 ret = webm_dash_manifest_cues(s, init_range);
4020 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4025 // use the bandwidth from the command line if it was provided
4026 if (matroska->bandwidth > 0) {
4027 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4028 matroska->bandwidth, 0);
4033 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4038 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4039 static const AVOption options[] = {
4040 { "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 },
4041 { "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 },
4045 static const AVClass webm_dash_class = {
4046 .class_name = "WebM DASH Manifest demuxer",
4047 .item_name = av_default_item_name,
4049 .version = LIBAVUTIL_VERSION_INT,
4052 AVInputFormat ff_matroska_demuxer = {
4053 .name = "matroska,webm",
4054 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4055 .extensions = "mkv,mk3d,mka,mks",
4056 .priv_data_size = sizeof(MatroskaDemuxContext),
4057 .read_probe = matroska_probe,
4058 .read_header = matroska_read_header,
4059 .read_packet = matroska_read_packet,
4060 .read_close = matroska_read_close,
4061 .read_seek = matroska_read_seek,
4062 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4065 AVInputFormat ff_webm_dash_manifest_demuxer = {
4066 .name = "webm_dash_manifest",
4067 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4068 .priv_data_size = sizeof(MatroskaDemuxContext),
4069 .read_header = webm_dash_manifest_read_header,
4070 .read_packet = webm_dash_manifest_read_packet,
4071 .read_close = matroska_read_close,
4072 .priv_class = &webm_dash_class,