2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
89 typedef const struct EbmlSyntax {
99 const struct EbmlSyntax *n;
103 typedef struct EbmlList {
108 typedef struct EbmlBin {
115 typedef struct Ebml {
120 uint64_t doctype_version;
123 typedef struct MatroskaTrackCompression {
126 } MatroskaTrackCompression;
128 typedef struct MatroskaTrackEncryption {
131 } MatroskaTrackEncryption;
133 typedef struct MatroskaTrackEncoding {
136 MatroskaTrackCompression compression;
137 MatroskaTrackEncryption encryption;
138 } MatroskaTrackEncoding;
140 typedef struct MatroskaMasteringMeta {
149 double max_luminance;
150 double min_luminance;
151 } MatroskaMasteringMeta;
153 typedef struct MatroskaTrackVideoColor {
154 uint64_t matrix_coefficients;
155 uint64_t bits_per_channel;
156 uint64_t chroma_sub_horz;
157 uint64_t chroma_sub_vert;
158 uint64_t cb_sub_horz;
159 uint64_t cb_sub_vert;
160 uint64_t chroma_siting_horz;
161 uint64_t chroma_siting_vert;
163 uint64_t transfer_characteristics;
167 MatroskaMasteringMeta mastering_meta;
168 } MatroskaTrackVideoColor;
170 typedef struct MatroskaTrackVideoProjection {
176 } MatroskaTrackVideoProjection;
178 typedef struct MatroskaTrackVideo {
180 uint64_t display_width;
181 uint64_t display_height;
182 uint64_t pixel_width;
183 uint64_t pixel_height;
185 uint64_t display_unit;
187 uint64_t field_order;
188 uint64_t stereo_mode;
191 MatroskaTrackVideoProjection projection;
192 } MatroskaTrackVideo;
194 typedef struct MatroskaTrackAudio {
196 double out_samplerate;
200 /* real audio header (extracted from extradata) */
207 uint64_t buf_timecode;
209 } MatroskaTrackAudio;
211 typedef struct MatroskaTrackPlane {
214 } MatroskaTrackPlane;
216 typedef struct MatroskaTrackOperation {
217 EbmlList combine_planes;
218 } MatroskaTrackOperation;
220 typedef struct MatroskaTrack {
229 uint64_t default_duration;
230 uint64_t flag_default;
231 uint64_t flag_forced;
232 uint64_t seek_preroll;
233 MatroskaTrackVideo video;
234 MatroskaTrackAudio audio;
235 MatroskaTrackOperation operation;
237 uint64_t codec_delay;
238 uint64_t codec_delay_in_track_tb;
241 int64_t end_timecode;
243 uint64_t max_block_additional_id;
245 uint32_t palette[AVPALETTE_COUNT];
249 typedef struct MatroskaAttachment {
256 } MatroskaAttachment;
258 typedef struct MatroskaChapter {
267 typedef struct MatroskaIndexPos {
272 typedef struct MatroskaIndex {
277 typedef struct MatroskaTag {
285 typedef struct MatroskaTagTarget {
293 typedef struct MatroskaTags {
294 MatroskaTagTarget target;
298 typedef struct MatroskaSeekhead {
303 typedef struct MatroskaLevel {
308 typedef struct MatroskaBlock {
313 uint64_t additional_id;
315 int64_t discard_padding;
318 typedef struct MatroskaCluster {
324 typedef struct MatroskaLevel1Element {
328 } MatroskaLevel1Element;
330 typedef struct MatroskaDemuxContext {
331 const AVClass *class;
332 AVFormatContext *ctx;
336 MatroskaLevel levels[EBML_MAX_DEPTH];
345 EbmlList attachments;
351 /* byte position of the segment inside the stream */
352 int64_t segment_start;
354 /* the packet queue */
356 AVPacketList *queue_end;
360 /* What to skip before effectively reading a packet. */
361 int skip_to_keyframe;
362 uint64_t skip_to_timecode;
364 /* File has a CUES element, but we defer parsing until it is needed. */
365 int cues_parsing_deferred;
367 /* Level1 elements and whether they were read yet */
368 MatroskaLevel1Element level1_elems[64];
369 int num_level1_elems;
371 MatroskaCluster current_cluster;
373 /* WebM DASH Manifest live flag */
376 /* Bandwidth value for WebM DASH Manifest */
378 } MatroskaDemuxContext;
380 static const EbmlSyntax ebml_header[] = {
381 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
382 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
383 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
384 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
385 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
386 { EBML_ID_EBMLVERSION, EBML_NONE },
387 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
391 static const EbmlSyntax ebml_syntax[] = {
392 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
396 static const EbmlSyntax matroska_info[] = {
397 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
398 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
399 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
400 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
401 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
402 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
403 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
407 static const EbmlSyntax matroska_mastering_meta[] = {
408 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
409 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
421 static const EbmlSyntax matroska_track_video_color[] = {
422 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
423 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
424 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
431 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
434 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
439 static const EbmlSyntax matroska_track_video_projection[] = {
440 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
441 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
442 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
448 static const EbmlSyntax matroska_track_video[] = {
449 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
450 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
451 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
452 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
453 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
454 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
455 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
456 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
457 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
458 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
459 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
462 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
463 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
464 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
466 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
470 static const EbmlSyntax matroska_track_audio[] = {
471 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
472 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
473 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
474 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
478 static const EbmlSyntax matroska_track_encoding_compression[] = {
479 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
480 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
484 static const EbmlSyntax matroska_track_encoding_encryption[] = {
485 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
486 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
487 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
488 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
494 static const EbmlSyntax matroska_track_encoding[] = {
495 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
496 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
497 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
498 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
499 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
503 static const EbmlSyntax matroska_track_encodings[] = {
504 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
508 static const EbmlSyntax matroska_track_plane[] = {
509 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
510 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
514 static const EbmlSyntax matroska_track_combine_planes[] = {
515 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
519 static const EbmlSyntax matroska_track_operation[] = {
520 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
524 static const EbmlSyntax matroska_track[] = {
525 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
526 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
527 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
528 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
529 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
530 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
531 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
532 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
533 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
534 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
535 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
536 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
537 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
538 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
539 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
540 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
541 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
542 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
543 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
544 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
545 { MATROSKA_ID_CODECNAME, EBML_NONE },
546 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
547 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
548 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
549 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
550 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
554 static const EbmlSyntax matroska_tracks[] = {
555 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
559 static const EbmlSyntax matroska_attachment[] = {
560 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
561 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
562 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
563 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
564 { MATROSKA_ID_FILEDESC, EBML_NONE },
568 static const EbmlSyntax matroska_attachments[] = {
569 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
573 static const EbmlSyntax matroska_chapter_display[] = {
574 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
575 { MATROSKA_ID_CHAPLANG, EBML_NONE },
576 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
580 static const EbmlSyntax matroska_chapter_entry[] = {
581 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
582 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
584 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
585 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
586 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
587 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
588 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
592 static const EbmlSyntax matroska_chapter[] = {
593 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
594 { MATROSKA_ID_EDITIONUID, EBML_NONE },
595 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
601 static const EbmlSyntax matroska_chapters[] = {
602 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
606 static const EbmlSyntax matroska_index_pos[] = {
607 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
608 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
609 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
610 { MATROSKA_ID_CUEDURATION, EBML_NONE },
611 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
615 static const EbmlSyntax matroska_index_entry[] = {
616 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
617 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
621 static const EbmlSyntax matroska_index[] = {
622 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
626 static const EbmlSyntax matroska_simpletag[] = {
627 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
628 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
629 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
630 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
631 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
636 static const EbmlSyntax matroska_tagtargets[] = {
637 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
638 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
639 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
640 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
641 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
645 static const EbmlSyntax matroska_tag[] = {
646 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
647 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
651 static const EbmlSyntax matroska_tags[] = {
652 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
656 static const EbmlSyntax matroska_seekhead_entry[] = {
657 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
658 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
662 static const EbmlSyntax matroska_seekhead[] = {
663 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
667 static const EbmlSyntax matroska_segment[] = {
668 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
669 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
670 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
671 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
672 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
673 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
674 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
675 { MATROSKA_ID_CLUSTER, EBML_STOP },
679 static const EbmlSyntax matroska_segments[] = {
680 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
684 static const EbmlSyntax matroska_blockmore[] = {
685 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
686 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
690 static const EbmlSyntax matroska_blockadditions[] = {
691 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
695 static const EbmlSyntax matroska_blockgroup[] = {
696 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
697 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
698 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
699 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
700 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
701 { MATROSKA_ID_CODECSTATE, EBML_NONE },
702 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
706 static const EbmlSyntax matroska_cluster_parsing[] = {
707 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
708 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
709 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
710 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
711 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
712 { MATROSKA_ID_INFO, EBML_NONE },
713 { MATROSKA_ID_CUES, EBML_NONE },
714 { MATROSKA_ID_TAGS, EBML_NONE },
715 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
716 { MATROSKA_ID_CLUSTER, EBML_STOP },
720 static const EbmlSyntax matroska_cluster[] = {
721 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
722 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
723 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
724 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
725 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
729 static const EbmlSyntax matroska_clusters[] = {
730 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
731 { MATROSKA_ID_INFO, EBML_NONE },
732 { MATROSKA_ID_CUES, EBML_NONE },
733 { MATROSKA_ID_TAGS, EBML_NONE },
734 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
738 static const char *const matroska_doctypes[] = { "matroska", "webm" };
740 static int matroska_read_close(AVFormatContext *s);
743 * This function prepares the status for parsing of level 1 elements.
745 static int matroska_reset_status(MatroskaDemuxContext *matroska,
746 uint32_t id, int64_t position)
749 int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
754 matroska->current_id = id;
755 matroska->num_levels = 1;
756 matroska->current_cluster.pos = 0;
761 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
763 AVIOContext *pb = matroska->ctx->pb;
766 /* Try to seek to the last position to resync from. If this doesn't work,
767 * we resync from the earliest position available: The start of the buffer. */
768 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
769 av_log(matroska->ctx, AV_LOG_WARNING,
770 "Seek to desired resync point failed. Seeking to "
771 "earliest point available instead.\n");
772 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
773 last_pos + 1), SEEK_SET);
778 // try to find a toplevel element
779 while (!avio_feof(pb)) {
780 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
781 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
782 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
783 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
784 /* Prepare the context for parsing of a level 1 element. */
785 matroska_reset_status(matroska, id, -1);
786 /* Given that we are here means that an error has occured,
787 * so treat the segment as unknown length in order not to
788 * discard valid data that happens to be beyond the designated
789 * end of the segment. */
790 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
793 id = (id << 8) | avio_r8(pb);
797 return pb->error ? pb->error : AVERROR_EOF;
801 * Return: Whether we reached the end of a level in the hierarchy or not.
803 static int ebml_level_end(MatroskaDemuxContext *matroska)
805 AVIOContext *pb = matroska->ctx->pb;
806 int64_t pos = avio_tell(pb);
808 if (matroska->num_levels > 0) {
809 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
810 if (pos - level->start >= level->length || matroska->current_id) {
811 matroska->num_levels--;
815 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
819 * Read: an "EBML number", which is defined as a variable-length
820 * array of bytes. The first byte indicates the length by giving a
821 * number of 0-bits followed by a one. The position of the first
822 * "one" bit inside the first byte indicates the length of this
824 * Returns: number of bytes read, < 0 on error
826 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
827 int max_size, uint64_t *number, int eof_forbidden)
833 /* The first byte tells us the length in bytes - except when it is zero. */
838 /* get the length of the EBML number */
839 read = 8 - ff_log2_tab[total];
841 if (!total || read > max_size) {
842 pos = avio_tell(pb) - 1;
844 av_log(matroska->ctx, AV_LOG_ERROR,
845 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
846 "of an EBML number\n", pos, pos);
848 av_log(matroska->ctx, AV_LOG_ERROR,
849 "Length %d indicated by an EBML number's first byte 0x%02x "
850 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
851 read, (uint8_t) total, pos, pos, max_size);
853 return AVERROR_INVALIDDATA;
856 /* read out length */
857 total ^= 1 << ff_log2_tab[total];
859 total = (total << 8) | avio_r8(pb);
861 if (pb->eof_reached) {
873 av_log(matroska->ctx, AV_LOG_ERROR,
874 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
879 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
880 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
887 * Read a EBML length value.
888 * This needs special handling for the "unknown length" case which has multiple
891 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
894 int res = ebml_read_num(matroska, pb, 8, number, 1);
895 if (res > 0 && *number + 1 == 1ULL << (7 * res))
896 *number = EBML_UNKNOWN_LENGTH;
901 * Read the next element as an unsigned int.
902 * Returns NEEDS_CHECKING.
904 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
908 /* big-endian ordering; build up number */
911 *num = (*num << 8) | avio_r8(pb);
913 return NEEDS_CHECKING;
917 * Read the next element as a signed int.
918 * Returns NEEDS_CHECKING.
920 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
927 *num = sign_extend(avio_r8(pb), 8);
929 /* big-endian ordering; build up number */
931 *num = ((uint64_t)*num << 8) | avio_r8(pb);
934 return NEEDS_CHECKING;
938 * Read the next element as a float.
939 * Returns NEEDS_CHECKING or < 0 on obvious failure.
941 static int ebml_read_float(AVIOContext *pb, int size, double *num)
946 *num = av_int2float(avio_rb32(pb));
948 *num = av_int2double(avio_rb64(pb));
950 return AVERROR_INVALIDDATA;
952 return NEEDS_CHECKING;
956 * Read the next element as an ASCII string.
957 * 0 is success, < 0 or NEEDS_CHECKING is failure.
959 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
964 /* EBML strings are usually not 0-terminated, so we allocate one
965 * byte more, read the string and NULL-terminate it ourselves. */
966 if (!(res = av_malloc(size + 1)))
967 return AVERROR(ENOMEM);
968 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
970 return ret < 0 ? ret : NEEDS_CHECKING;
980 * Read the next element as binary data.
981 * 0 is success, < 0 or NEEDS_CHECKING is failure.
983 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
987 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
990 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
992 bin->data = bin->buf->data;
994 bin->pos = avio_tell(pb);
995 if ((ret = avio_read(pb, bin->data, length)) != length) {
996 av_buffer_unref(&bin->buf);
999 return ret < 0 ? ret : NEEDS_CHECKING;
1006 * Read the next element, but only the header. The contents
1007 * are supposed to be sub-elements which can be read separately.
1008 * 0 is success, < 0 is failure.
1010 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
1012 AVIOContext *pb = matroska->ctx->pb;
1013 MatroskaLevel *level;
1015 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1016 av_log(matroska->ctx, AV_LOG_ERROR,
1017 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1018 return AVERROR(ENOSYS);
1021 level = &matroska->levels[matroska->num_levels++];
1022 level->start = avio_tell(pb);
1023 level->length = length;
1029 * Read signed/unsigned "EBML" numbers.
1030 * Return: number of bytes processed, < 0 on error
1032 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1033 uint8_t *data, uint32_t size, uint64_t *num)
1036 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1037 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1041 * Same as above, but signed.
1043 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1044 uint8_t *data, uint32_t size, int64_t *num)
1049 /* read as unsigned number first */
1050 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1053 /* make signed (weird way) */
1054 *num = unum - ((1LL << (7 * res - 1)) - 1);
1059 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1060 EbmlSyntax *syntax, void *data);
1062 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1063 uint32_t id, void *data)
1066 for (i = 0; syntax[i].id; i++)
1067 if (id == syntax[i].id)
1069 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1070 matroska->num_levels > 0 &&
1071 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1072 return 0; // we reached the end of an unknown size cluster
1073 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1074 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1076 return ebml_parse_elem(matroska, &syntax[i], data);
1079 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1082 if (!matroska->current_id) {
1084 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id, 0);
1086 // in live mode, finish parsing if EOF is reached.
1087 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1088 res == AVERROR_EOF) ? 1 : res;
1090 matroska->current_id = id | 1 << 7 * res;
1092 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
1095 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1100 for (i = 0; syntax[i].id; i++)
1101 switch (syntax[i].type) {
1103 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1106 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1109 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1113 // the default may be NULL
1114 if (syntax[i].def.s) {
1115 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1116 *dst = av_strdup(syntax[i].def.s);
1118 return AVERROR(ENOMEM);
1123 while (!res && !ebml_level_end(matroska))
1124 res = ebml_parse(matroska, syntax, data);
1129 static int is_ebml_id_valid(uint32_t id)
1131 // Due to endian nonsense in Matroska, the highest byte with any bits set
1132 // will contain the leading length bit. This bit in turn identifies the
1133 // total byte length of the element by its position within the byte.
1134 unsigned int bits = av_log2(id);
1135 return id && (bits + 7) / 8 == (8 - bits % 8);
1139 * Allocate and return the entry for the level1 element with the given ID. If
1140 * an entry already exists, return the existing entry.
1142 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1146 MatroskaLevel1Element *elem;
1148 if (!is_ebml_id_valid(id))
1151 // Some files link to all clusters; useless.
1152 if (id == MATROSKA_ID_CLUSTER)
1155 // There can be multiple seekheads.
1156 if (id != MATROSKA_ID_SEEKHEAD) {
1157 for (i = 0; i < matroska->num_level1_elems; i++) {
1158 if (matroska->level1_elems[i].id == id)
1159 return &matroska->level1_elems[i];
1163 // Only a completely broken file would have more elements.
1164 // It also provides a low-effort way to escape from circular seekheads
1165 // (every iteration will add a level1 entry).
1166 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1167 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1171 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1172 *elem = (MatroskaLevel1Element){.id = id};
1177 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1178 EbmlSyntax *syntax, void *data)
1180 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1184 // max. 16 MB for strings
1185 [EBML_STR] = 0x1000000,
1186 [EBML_UTF8] = 0x1000000,
1187 // max. 256 MB for binary data
1188 [EBML_BIN] = 0x10000000,
1189 // no limits for anything else
1191 AVIOContext *pb = matroska->ctx->pb;
1192 uint32_t id = syntax->id;
1196 MatroskaLevel1Element *level1_elem;
1198 data = (char *) data + syntax->data_offset;
1199 if (syntax->list_elem_size) {
1200 EbmlList *list = data;
1201 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1203 return AVERROR(ENOMEM);
1204 list->elem = newelem;
1205 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1206 memset(data, 0, syntax->list_elem_size);
1210 if (syntax->type != EBML_STOP) {
1211 matroska->current_id = 0;
1212 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1214 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1215 av_log(matroska->ctx, AV_LOG_ERROR,
1216 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1217 length, max_lengths[syntax->type], syntax->type);
1218 return AVERROR_INVALIDDATA;
1220 if (matroska->num_levels > 0) {
1221 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1222 AVIOContext *pb = matroska->ctx->pb;
1223 int64_t pos = avio_tell(pb);
1225 if (length != EBML_UNKNOWN_LENGTH &&
1226 level->length != EBML_UNKNOWN_LENGTH) {
1227 uint64_t elem_end = pos + length,
1228 level_end = level->start + level->length;
1230 if (level_end < elem_end) {
1231 av_log(matroska->ctx, AV_LOG_ERROR,
1232 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1233 "containing master element ending at 0x%"PRIx64"\n",
1234 pos, elem_end, level_end);
1235 return AVERROR_INVALIDDATA;
1237 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1238 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1239 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1240 return AVERROR_INVALIDDATA;
1241 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1242 // According to the specifications only clusters and segments
1243 // are allowed to be unknown-sized.
1244 av_log(matroska->ctx, AV_LOG_ERROR,
1245 "Found unknown-sized element other than a cluster at "
1246 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1247 return AVERROR_INVALIDDATA;
1252 switch (syntax->type) {
1254 res = ebml_read_uint(pb, length, data);
1257 res = ebml_read_sint(pb, length, data);
1260 res = ebml_read_float(pb, length, data);
1264 res = ebml_read_ascii(pb, length, data);
1267 res = ebml_read_binary(pb, length, data);
1271 if ((res = ebml_read_master(matroska, length)) < 0)
1273 if (id == MATROSKA_ID_SEGMENT)
1274 matroska->segment_start = avio_tell(matroska->ctx->pb);
1275 if (id == MATROSKA_ID_CUES)
1276 matroska->cues_parsing_deferred = 0;
1277 if (syntax->type == EBML_LEVEL1 &&
1278 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1279 if (level1_elem->parsed)
1280 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1281 level1_elem->parsed = 1;
1283 return ebml_parse_nest(matroska, syntax->def.n, data);
1289 if (ffio_limit(pb, length) != length) {
1290 // ffio_limit emits its own error message,
1291 // so we don't have to.
1292 return AVERROR(EIO);
1294 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1295 // avio_skip might take us past EOF. We check for this
1296 // by skipping only length - 1 bytes, reading a byte and
1297 // checking the error flags. This is done in order to check
1298 // that the element has been properly skipped even when
1299 // no filesize (that ffio_limit relies on) is available.
1301 res = NEEDS_CHECKING;
1308 if (res == NEEDS_CHECKING) {
1309 if (pb->eof_reached) {
1318 if (res == AVERROR_INVALIDDATA)
1319 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1320 else if (res == AVERROR(EIO))
1321 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1322 else if (res == AVERROR_EOF) {
1323 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1330 static void ebml_free(EbmlSyntax *syntax, void *data)
1333 for (i = 0; syntax[i].id; i++) {
1334 void *data_off = (char *) data + syntax[i].data_offset;
1335 switch (syntax[i].type) {
1341 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1345 if (syntax[i].list_elem_size) {
1346 EbmlList *list = data_off;
1347 char *ptr = list->elem;
1348 for (j = 0; j < list->nb_elem;
1349 j++, ptr += syntax[i].list_elem_size)
1350 ebml_free(syntax[i].def.n, ptr);
1351 av_freep(&list->elem);
1354 ebml_free(syntax[i].def.n, data_off);
1364 static int matroska_probe(const AVProbeData *p)
1367 int len_mask = 0x80, size = 1, n = 1, i;
1370 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1373 /* length of header */
1375 while (size <= 8 && !(total & len_mask)) {
1381 total &= (len_mask - 1);
1383 total = (total << 8) | p->buf[4 + n++];
1385 /* Does the probe data contain the whole header? */
1386 if (p->buf_size < 4 + size + total)
1389 /* The header should contain a known document type. For now,
1390 * we don't parse the whole header but simply check for the
1391 * availability of that array of characters inside the header.
1392 * Not fully fool-proof, but good enough. */
1393 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1394 size_t probelen = strlen(matroska_doctypes[i]);
1395 if (total < probelen)
1397 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1398 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1399 return AVPROBE_SCORE_MAX;
1402 // probably valid EBML header but no recognized doctype
1403 return AVPROBE_SCORE_EXTENSION;
1406 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1409 MatroskaTrack *tracks = matroska->tracks.elem;
1412 for (i = 0; i < matroska->tracks.nb_elem; i++)
1413 if (tracks[i].num == num)
1416 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1420 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1421 MatroskaTrack *track)
1423 MatroskaTrackEncoding *encodings = track->encodings.elem;
1424 uint8_t *data = *buf;
1425 int isize = *buf_size;
1426 uint8_t *pkt_data = NULL;
1427 uint8_t av_unused *newpktdata;
1428 int pkt_size = isize;
1432 if (pkt_size >= 10000000U)
1433 return AVERROR_INVALIDDATA;
1435 switch (encodings[0].compression.algo) {
1436 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1438 int header_size = encodings[0].compression.settings.size;
1439 uint8_t *header = encodings[0].compression.settings.data;
1441 if (header_size && !header) {
1442 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1449 pkt_size = isize + header_size;
1450 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1452 return AVERROR(ENOMEM);
1454 memcpy(pkt_data, header, header_size);
1455 memcpy(pkt_data + header_size, data, isize);
1459 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1461 olen = pkt_size *= 3;
1462 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1463 + AV_INPUT_BUFFER_PADDING_SIZE);
1465 result = AVERROR(ENOMEM);
1468 pkt_data = newpktdata;
1469 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1470 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1472 result = AVERROR_INVALIDDATA;
1479 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1481 z_stream zstream = { 0 };
1482 if (inflateInit(&zstream) != Z_OK)
1484 zstream.next_in = data;
1485 zstream.avail_in = isize;
1488 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1490 inflateEnd(&zstream);
1491 result = AVERROR(ENOMEM);
1494 pkt_data = newpktdata;
1495 zstream.avail_out = pkt_size - zstream.total_out;
1496 zstream.next_out = pkt_data + zstream.total_out;
1497 result = inflate(&zstream, Z_NO_FLUSH);
1498 } while (result == Z_OK && pkt_size < 10000000);
1499 pkt_size = zstream.total_out;
1500 inflateEnd(&zstream);
1501 if (result != Z_STREAM_END) {
1502 if (result == Z_MEM_ERROR)
1503 result = AVERROR(ENOMEM);
1505 result = AVERROR_INVALIDDATA;
1512 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1514 bz_stream bzstream = { 0 };
1515 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1517 bzstream.next_in = data;
1518 bzstream.avail_in = isize;
1521 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1523 BZ2_bzDecompressEnd(&bzstream);
1524 result = AVERROR(ENOMEM);
1527 pkt_data = newpktdata;
1528 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1529 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1530 result = BZ2_bzDecompress(&bzstream);
1531 } while (result == BZ_OK && pkt_size < 10000000);
1532 pkt_size = bzstream.total_out_lo32;
1533 BZ2_bzDecompressEnd(&bzstream);
1534 if (result != BZ_STREAM_END) {
1535 if (result == BZ_MEM_ERROR)
1536 result = AVERROR(ENOMEM);
1538 result = AVERROR_INVALIDDATA;
1545 return AVERROR_INVALIDDATA;
1548 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1551 *buf_size = pkt_size;
1559 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1560 AVDictionary **metadata, char *prefix)
1562 MatroskaTag *tags = list->elem;
1566 for (i = 0; i < list->nb_elem; i++) {
1567 const char *lang = tags[i].lang &&
1568 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1570 if (!tags[i].name) {
1571 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1575 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1577 av_strlcpy(key, tags[i].name, sizeof(key));
1578 if (tags[i].def || !lang) {
1579 av_dict_set(metadata, key, tags[i].string, 0);
1580 if (tags[i].sub.nb_elem)
1581 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1584 av_strlcat(key, "-", sizeof(key));
1585 av_strlcat(key, lang, sizeof(key));
1586 av_dict_set(metadata, key, tags[i].string, 0);
1587 if (tags[i].sub.nb_elem)
1588 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1591 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1594 static void matroska_convert_tags(AVFormatContext *s)
1596 MatroskaDemuxContext *matroska = s->priv_data;
1597 MatroskaTags *tags = matroska->tags.elem;
1600 for (i = 0; i < matroska->tags.nb_elem; i++) {
1601 if (tags[i].target.attachuid) {
1602 MatroskaAttachment *attachment = matroska->attachments.elem;
1604 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1605 if (attachment[j].uid == tags[i].target.attachuid &&
1606 attachment[j].stream) {
1607 matroska_convert_tag(s, &tags[i].tag,
1608 &attachment[j].stream->metadata, NULL);
1613 av_log(NULL, AV_LOG_WARNING,
1614 "The tags at index %d refer to a "
1615 "non-existent attachment %"PRId64".\n",
1616 i, tags[i].target.attachuid);
1618 } else if (tags[i].target.chapteruid) {
1619 MatroskaChapter *chapter = matroska->chapters.elem;
1621 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1622 if (chapter[j].uid == tags[i].target.chapteruid &&
1623 chapter[j].chapter) {
1624 matroska_convert_tag(s, &tags[i].tag,
1625 &chapter[j].chapter->metadata, NULL);
1630 av_log(NULL, AV_LOG_WARNING,
1631 "The tags at index %d refer to a non-existent chapter "
1633 i, tags[i].target.chapteruid);
1635 } else if (tags[i].target.trackuid) {
1636 MatroskaTrack *track = matroska->tracks.elem;
1638 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1639 if (track[j].uid == tags[i].target.trackuid &&
1641 matroska_convert_tag(s, &tags[i].tag,
1642 &track[j].stream->metadata, NULL);
1647 av_log(NULL, AV_LOG_WARNING,
1648 "The tags at index %d refer to a non-existent track "
1650 i, tags[i].target.trackuid);
1653 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1654 tags[i].target.type);
1659 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1662 uint32_t saved_id = matroska->current_id;
1663 int64_t before_pos = avio_tell(matroska->ctx->pb);
1664 MatroskaLevel level;
1669 offset = pos + matroska->segment_start;
1670 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1671 /* We don't want to lose our seekhead level, so we add
1672 * a dummy. This is a crude hack. */
1673 if (matroska->num_levels == EBML_MAX_DEPTH) {
1674 av_log(matroska->ctx, AV_LOG_INFO,
1675 "Max EBML element depth (%d) reached, "
1676 "cannot parse further.\n", EBML_MAX_DEPTH);
1677 ret = AVERROR_INVALIDDATA;
1680 level.length = EBML_UNKNOWN_LENGTH;
1681 matroska->levels[matroska->num_levels] = level;
1682 matroska->num_levels++;
1683 matroska->current_id = 0;
1685 ret = ebml_parse(matroska, matroska_segment, matroska);
1688 /* Seek back - notice that in all instances where this is used it is safe
1689 * to set the level to 1 and unset the position of the current cluster. */
1690 matroska_reset_status(matroska, saved_id, before_pos);
1695 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1697 EbmlList *seekhead_list = &matroska->seekhead;
1700 // we should not do any seeking in the streaming case
1701 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1704 for (i = 0; i < seekhead_list->nb_elem; i++) {
1705 MatroskaSeekhead *seekheads = seekhead_list->elem;
1706 uint32_t id = seekheads[i].id;
1707 uint64_t pos = seekheads[i].pos;
1709 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1710 if (!elem || elem->parsed)
1715 // defer cues parsing until we actually need cue data.
1716 if (id == MATROSKA_ID_CUES)
1719 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1720 // mark index as broken
1721 matroska->cues_parsing_deferred = -1;
1729 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1731 EbmlList *index_list;
1732 MatroskaIndex *index;
1733 uint64_t index_scale = 1;
1736 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1739 index_list = &matroska->index;
1740 index = index_list->elem;
1741 if (index_list->nb_elem < 2)
1743 if (index[1].time > 1E14 / matroska->time_scale) {
1744 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1747 for (i = 0; i < index_list->nb_elem; i++) {
1748 EbmlList *pos_list = &index[i].pos;
1749 MatroskaIndexPos *pos = pos_list->elem;
1750 for (j = 0; j < pos_list->nb_elem; j++) {
1751 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1753 if (track && track->stream)
1754 av_add_index_entry(track->stream,
1755 pos[j].pos + matroska->segment_start,
1756 index[i].time / index_scale, 0, 0,
1762 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1765 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1768 for (i = 0; i < matroska->num_level1_elems; i++) {
1769 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1770 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1771 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1772 matroska->cues_parsing_deferred = -1;
1778 matroska_add_index_entries(matroska);
1781 static int matroska_aac_profile(char *codec_id)
1783 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1786 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1787 if (strstr(codec_id, aac_profiles[profile]))
1792 static int matroska_aac_sri(int samplerate)
1796 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1797 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1802 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1804 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1805 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1808 static int matroska_parse_flac(AVFormatContext *s,
1809 MatroskaTrack *track,
1812 AVStream *st = track->stream;
1813 uint8_t *p = track->codec_priv.data;
1814 int size = track->codec_priv.size;
1816 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1817 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1818 track->codec_priv.size = 0;
1822 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1824 p += track->codec_priv.size;
1825 size -= track->codec_priv.size;
1827 /* parse the remaining metadata blocks if present */
1829 int block_last, block_type, block_size;
1831 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1835 if (block_size > size)
1838 /* check for the channel mask */
1839 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1840 AVDictionary *dict = NULL;
1841 AVDictionaryEntry *chmask;
1843 ff_vorbis_comment(s, &dict, p, block_size, 0);
1844 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1846 uint64_t mask = strtol(chmask->value, NULL, 0);
1847 if (!mask || mask & ~0x3ffffULL) {
1848 av_log(s, AV_LOG_WARNING,
1849 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1851 st->codecpar->channel_layout = mask;
1853 av_dict_free(&dict);
1863 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1865 int major, minor, micro, bttb = 0;
1867 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1868 * this function, and fixed in 57.52 */
1869 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1870 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1872 switch (field_order) {
1873 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1874 return AV_FIELD_PROGRESSIVE;
1875 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1876 return AV_FIELD_UNKNOWN;
1877 case MATROSKA_VIDEO_FIELDORDER_TT:
1879 case MATROSKA_VIDEO_FIELDORDER_BB:
1881 case MATROSKA_VIDEO_FIELDORDER_BT:
1882 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1883 case MATROSKA_VIDEO_FIELDORDER_TB:
1884 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1886 return AV_FIELD_UNKNOWN;
1890 static void mkv_stereo_mode_display_mul(int stereo_mode,
1891 int *h_width, int *h_height)
1893 switch (stereo_mode) {
1894 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1895 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1896 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1897 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1898 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1900 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1901 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1902 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1903 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1906 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1907 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1908 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1909 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1915 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1916 const MatroskaTrackVideoColor *color = track->video.color.elem;
1917 const MatroskaMasteringMeta *mastering_meta;
1918 int has_mastering_primaries, has_mastering_luminance;
1920 if (!track->video.color.nb_elem)
1923 mastering_meta = &color->mastering_meta;
1924 // Mastering primaries are CIE 1931 coords, and must be > 0.
1925 has_mastering_primaries =
1926 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1927 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1928 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1929 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1930 has_mastering_luminance = mastering_meta->max_luminance > 0;
1932 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1933 st->codecpar->color_space = color->matrix_coefficients;
1934 if (color->primaries != AVCOL_PRI_RESERVED &&
1935 color->primaries != AVCOL_PRI_RESERVED0)
1936 st->codecpar->color_primaries = color->primaries;
1937 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1938 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1939 st->codecpar->color_trc = color->transfer_characteristics;
1940 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1941 color->range <= AVCOL_RANGE_JPEG)
1942 st->codecpar->color_range = color->range;
1943 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1944 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1945 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1946 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1947 st->codecpar->chroma_location =
1948 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1949 (color->chroma_siting_vert - 1) << 7);
1951 if (color->max_cll && color->max_fall) {
1954 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1956 return AVERROR(ENOMEM);
1957 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1958 (uint8_t *)metadata, size);
1960 av_freep(&metadata);
1963 metadata->MaxCLL = color->max_cll;
1964 metadata->MaxFALL = color->max_fall;
1967 if (has_mastering_primaries || has_mastering_luminance) {
1968 // Use similar rationals as other standards.
1969 const int chroma_den = 50000;
1970 const int luma_den = 10000;
1971 AVMasteringDisplayMetadata *metadata =
1972 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1973 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1974 sizeof(AVMasteringDisplayMetadata));
1976 return AVERROR(ENOMEM);
1978 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1979 if (has_mastering_primaries) {
1980 metadata->display_primaries[0][0] = av_make_q(
1981 round(mastering_meta->r_x * chroma_den), chroma_den);
1982 metadata->display_primaries[0][1] = av_make_q(
1983 round(mastering_meta->r_y * chroma_den), chroma_den);
1984 metadata->display_primaries[1][0] = av_make_q(
1985 round(mastering_meta->g_x * chroma_den), chroma_den);
1986 metadata->display_primaries[1][1] = av_make_q(
1987 round(mastering_meta->g_y * chroma_den), chroma_den);
1988 metadata->display_primaries[2][0] = av_make_q(
1989 round(mastering_meta->b_x * chroma_den), chroma_den);
1990 metadata->display_primaries[2][1] = av_make_q(
1991 round(mastering_meta->b_y * chroma_den), chroma_den);
1992 metadata->white_point[0] = av_make_q(
1993 round(mastering_meta->white_x * chroma_den), chroma_den);
1994 metadata->white_point[1] = av_make_q(
1995 round(mastering_meta->white_y * chroma_den), chroma_den);
1996 metadata->has_primaries = 1;
1998 if (has_mastering_luminance) {
1999 metadata->max_luminance = av_make_q(
2000 round(mastering_meta->max_luminance * luma_den), luma_den);
2001 metadata->min_luminance = av_make_q(
2002 round(mastering_meta->min_luminance * luma_den), luma_den);
2003 metadata->has_luminance = 1;
2009 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2010 AVSphericalMapping *spherical;
2011 enum AVSphericalProjection projection;
2012 size_t spherical_size;
2013 uint32_t l = 0, t = 0, r = 0, b = 0;
2014 uint32_t padding = 0;
2018 bytestream2_init(&gb, track->video.projection.private.data,
2019 track->video.projection.private.size);
2021 if (bytestream2_get_byte(&gb) != 0) {
2022 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2026 bytestream2_skip(&gb, 3); // flags
2028 switch (track->video.projection.type) {
2029 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2030 if (track->video.projection.private.size == 20) {
2031 t = bytestream2_get_be32(&gb);
2032 b = bytestream2_get_be32(&gb);
2033 l = bytestream2_get_be32(&gb);
2034 r = bytestream2_get_be32(&gb);
2036 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2037 av_log(NULL, AV_LOG_ERROR,
2038 "Invalid bounding rectangle coordinates "
2039 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2041 return AVERROR_INVALIDDATA;
2043 } else if (track->video.projection.private.size != 0) {
2044 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2045 return AVERROR_INVALIDDATA;
2048 if (l || t || r || b)
2049 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2051 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2053 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2054 if (track->video.projection.private.size < 4) {
2055 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2056 return AVERROR_INVALIDDATA;
2057 } else if (track->video.projection.private.size == 12) {
2058 uint32_t layout = bytestream2_get_be32(&gb);
2060 av_log(NULL, AV_LOG_WARNING,
2061 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2064 projection = AV_SPHERICAL_CUBEMAP;
2065 padding = bytestream2_get_be32(&gb);
2067 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2068 return AVERROR_INVALIDDATA;
2071 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2072 /* No Spherical metadata */
2075 av_log(NULL, AV_LOG_WARNING,
2076 "Unknown spherical metadata type %"PRIu64"\n",
2077 track->video.projection.type);
2081 spherical = av_spherical_alloc(&spherical_size);
2083 return AVERROR(ENOMEM);
2085 spherical->projection = projection;
2087 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2088 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2089 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2091 spherical->padding = padding;
2093 spherical->bound_left = l;
2094 spherical->bound_top = t;
2095 spherical->bound_right = r;
2096 spherical->bound_bottom = b;
2098 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2101 av_freep(&spherical);
2108 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2110 const AVCodecTag *codec_tags;
2112 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2113 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2115 /* Normalize noncompliant private data that starts with the fourcc
2116 * by expanding/shifting the data by 4 bytes and storing the data
2117 * size at the start. */
2118 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2119 int ret = av_buffer_realloc(&track->codec_priv.buf,
2120 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2124 track->codec_priv.data = track->codec_priv.buf->data;
2125 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2126 track->codec_priv.size += 4;
2127 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2130 *fourcc = AV_RL32(track->codec_priv.data + 4);
2131 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2136 static int matroska_parse_tracks(AVFormatContext *s)
2138 MatroskaDemuxContext *matroska = s->priv_data;
2139 MatroskaTrack *tracks = matroska->tracks.elem;
2144 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2145 MatroskaTrack *track = &tracks[i];
2146 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2147 EbmlList *encodings_list = &track->encodings;
2148 MatroskaTrackEncoding *encodings = encodings_list->elem;
2149 uint8_t *extradata = NULL;
2150 int extradata_size = 0;
2151 int extradata_offset = 0;
2152 uint32_t fourcc = 0;
2154 char* key_id_base64 = NULL;
2157 /* Apply some sanity checks. */
2158 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2159 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2160 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2161 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2162 av_log(matroska->ctx, AV_LOG_INFO,
2163 "Unknown or unsupported track type %"PRIu64"\n",
2167 if (!track->codec_id)
2170 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2171 isnan(track->audio.samplerate)) {
2172 av_log(matroska->ctx, AV_LOG_WARNING,
2173 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2174 track->audio.samplerate);
2175 track->audio.samplerate = 8000;
2178 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2179 if (!track->default_duration && track->video.frame_rate > 0) {
2180 double default_duration = 1000000000 / track->video.frame_rate;
2181 if (default_duration > UINT64_MAX || default_duration < 0) {
2182 av_log(matroska->ctx, AV_LOG_WARNING,
2183 "Invalid frame rate %e. Cannot calculate default duration.\n",
2184 track->video.frame_rate);
2186 track->default_duration = default_duration;
2189 if (track->video.display_width == -1)
2190 track->video.display_width = track->video.pixel_width;
2191 if (track->video.display_height == -1)
2192 track->video.display_height = track->video.pixel_height;
2193 if (track->video.color_space.size == 4)
2194 fourcc = AV_RL32(track->video.color_space.data);
2195 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2196 if (!track->audio.out_samplerate)
2197 track->audio.out_samplerate = track->audio.samplerate;
2199 if (encodings_list->nb_elem > 1) {
2200 av_log(matroska->ctx, AV_LOG_ERROR,
2201 "Multiple combined encodings not supported");
2202 } else if (encodings_list->nb_elem == 1) {
2203 if (encodings[0].type) {
2204 if (encodings[0].encryption.key_id.size > 0) {
2205 /* Save the encryption key id to be stored later as a
2207 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2208 key_id_base64 = av_malloc(b64_size);
2209 if (key_id_base64 == NULL)
2210 return AVERROR(ENOMEM);
2212 av_base64_encode(key_id_base64, b64_size,
2213 encodings[0].encryption.key_id.data,
2214 encodings[0].encryption.key_id.size);
2216 encodings[0].scope = 0;
2217 av_log(matroska->ctx, AV_LOG_ERROR,
2218 "Unsupported encoding type");
2222 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2225 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2228 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2230 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2231 encodings[0].scope = 0;
2232 av_log(matroska->ctx, AV_LOG_ERROR,
2233 "Unsupported encoding type");
2234 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2235 uint8_t *codec_priv = track->codec_priv.data;
2236 int ret = matroska_decode_buffer(&track->codec_priv.data,
2237 &track->codec_priv.size,
2240 track->codec_priv.data = NULL;
2241 track->codec_priv.size = 0;
2242 av_log(matroska->ctx, AV_LOG_ERROR,
2243 "Failed to decode codec private data\n");
2246 if (codec_priv != track->codec_priv.data) {
2247 av_buffer_unref(&track->codec_priv.buf);
2248 if (track->codec_priv.data) {
2249 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2250 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2252 if (!track->codec_priv.buf) {
2253 av_freep(&track->codec_priv.data);
2254 track->codec_priv.size = 0;
2255 return AVERROR(ENOMEM);
2262 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2263 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2264 strlen(ff_mkv_codec_tags[j].str))) {
2265 codec_id = ff_mkv_codec_tags[j].id;
2270 st = track->stream = avformat_new_stream(s, NULL);
2272 av_free(key_id_base64);
2273 return AVERROR(ENOMEM);
2276 if (key_id_base64) {
2277 /* export encryption key id as base64 metadata tag */
2278 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2279 av_freep(&key_id_base64);
2282 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2283 track->codec_priv.size >= 40 &&
2284 track->codec_priv.data) {
2285 track->ms_compat = 1;
2286 bit_depth = AV_RL16(track->codec_priv.data + 14);
2287 fourcc = AV_RL32(track->codec_priv.data + 16);
2288 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2291 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2293 extradata_offset = 40;
2294 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2295 track->codec_priv.size >= 14 &&
2296 track->codec_priv.data) {
2298 ffio_init_context(&b, track->codec_priv.data,
2299 track->codec_priv.size,
2300 0, NULL, NULL, NULL, NULL);
2301 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2304 codec_id = st->codecpar->codec_id;
2305 fourcc = st->codecpar->codec_tag;
2306 extradata_offset = FFMIN(track->codec_priv.size, 18);
2307 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2308 /* Normally 36, but allow noncompliant private data */
2309 && (track->codec_priv.size >= 32)
2310 && (track->codec_priv.data)) {
2311 uint16_t sample_size;
2312 int ret = get_qt_codec(track, &fourcc, &codec_id);
2315 sample_size = AV_RB16(track->codec_priv.data + 26);
2317 if (sample_size == 8) {
2318 fourcc = MKTAG('r','a','w',' ');
2319 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2320 } else if (sample_size == 16) {
2321 fourcc = MKTAG('t','w','o','s');
2322 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2325 if ((fourcc == MKTAG('t','w','o','s') ||
2326 fourcc == MKTAG('s','o','w','t')) &&
2328 codec_id = AV_CODEC_ID_PCM_S8;
2329 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2330 (track->codec_priv.size >= 21) &&
2331 (track->codec_priv.data)) {
2332 int ret = get_qt_codec(track, &fourcc, &codec_id);
2335 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2336 fourcc = MKTAG('S','V','Q','3');
2337 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2339 if (codec_id == AV_CODEC_ID_NONE)
2340 av_log(matroska->ctx, AV_LOG_ERROR,
2341 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2342 if (track->codec_priv.size >= 86) {
2343 bit_depth = AV_RB16(track->codec_priv.data + 82);
2344 ffio_init_context(&b, track->codec_priv.data,
2345 track->codec_priv.size,
2346 0, NULL, NULL, NULL, NULL);
2347 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2349 track->has_palette = 1;
2352 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2353 switch (track->audio.bitdepth) {
2355 codec_id = AV_CODEC_ID_PCM_U8;
2358 codec_id = AV_CODEC_ID_PCM_S24BE;
2361 codec_id = AV_CODEC_ID_PCM_S32BE;
2364 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2365 switch (track->audio.bitdepth) {
2367 codec_id = AV_CODEC_ID_PCM_U8;
2370 codec_id = AV_CODEC_ID_PCM_S24LE;
2373 codec_id = AV_CODEC_ID_PCM_S32LE;
2376 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2377 track->audio.bitdepth == 64) {
2378 codec_id = AV_CODEC_ID_PCM_F64LE;
2379 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2380 int profile = matroska_aac_profile(track->codec_id);
2381 int sri = matroska_aac_sri(track->audio.samplerate);
2382 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2384 return AVERROR(ENOMEM);
2385 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2386 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2387 if (strstr(track->codec_id, "SBR")) {
2388 sri = matroska_aac_sri(track->audio.out_samplerate);
2389 extradata[2] = 0x56;
2390 extradata[3] = 0xE5;
2391 extradata[4] = 0x80 | (sri << 3);
2395 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2396 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2397 * Create the "atom size", "tag", and "tag version" fields the
2398 * decoder expects manually. */
2399 extradata_size = 12 + track->codec_priv.size;
2400 extradata = av_mallocz(extradata_size +
2401 AV_INPUT_BUFFER_PADDING_SIZE);
2403 return AVERROR(ENOMEM);
2404 AV_WB32(extradata, extradata_size);
2405 memcpy(&extradata[4], "alac", 4);
2406 AV_WB32(&extradata[8], 0);
2407 memcpy(&extradata[12], track->codec_priv.data,
2408 track->codec_priv.size);
2409 } else if (codec_id == AV_CODEC_ID_TTA) {
2410 extradata_size = 30;
2411 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2413 return AVERROR(ENOMEM);
2414 ffio_init_context(&b, extradata, extradata_size, 1,
2415 NULL, NULL, NULL, NULL);
2416 avio_write(&b, "TTA1", 4);
2418 if (track->audio.channels > UINT16_MAX ||
2419 track->audio.bitdepth > UINT16_MAX) {
2420 av_log(matroska->ctx, AV_LOG_WARNING,
2421 "Too large audio channel number %"PRIu64
2422 " or bitdepth %"PRIu64". Skipping track.\n",
2423 track->audio.channels, track->audio.bitdepth);
2424 av_freep(&extradata);
2425 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2426 return AVERROR_INVALIDDATA;
2430 avio_wl16(&b, track->audio.channels);
2431 avio_wl16(&b, track->audio.bitdepth);
2432 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2433 return AVERROR_INVALIDDATA;
2434 avio_wl32(&b, track->audio.out_samplerate);
2435 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2436 track->audio.out_samplerate,
2437 AV_TIME_BASE * 1000));
2438 } else if (codec_id == AV_CODEC_ID_RV10 ||
2439 codec_id == AV_CODEC_ID_RV20 ||
2440 codec_id == AV_CODEC_ID_RV30 ||
2441 codec_id == AV_CODEC_ID_RV40) {
2442 extradata_offset = 26;
2443 } else if (codec_id == AV_CODEC_ID_RA_144) {
2444 track->audio.out_samplerate = 8000;
2445 track->audio.channels = 1;
2446 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2447 codec_id == AV_CODEC_ID_COOK ||
2448 codec_id == AV_CODEC_ID_ATRAC3 ||
2449 codec_id == AV_CODEC_ID_SIPR)
2450 && track->codec_priv.data) {
2453 ffio_init_context(&b, track->codec_priv.data,
2454 track->codec_priv.size,
2455 0, NULL, NULL, NULL, NULL);
2457 flavor = avio_rb16(&b);
2458 track->audio.coded_framesize = avio_rb32(&b);
2460 track->audio.sub_packet_h = avio_rb16(&b);
2461 track->audio.frame_size = avio_rb16(&b);
2462 track->audio.sub_packet_size = avio_rb16(&b);
2464 track->audio.coded_framesize <= 0 ||
2465 track->audio.sub_packet_h <= 0 ||
2466 track->audio.frame_size <= 0 ||
2467 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2468 return AVERROR_INVALIDDATA;
2469 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2470 track->audio.frame_size);
2471 if (!track->audio.buf)
2472 return AVERROR(ENOMEM);
2473 if (codec_id == AV_CODEC_ID_RA_288) {
2474 st->codecpar->block_align = track->audio.coded_framesize;
2475 track->codec_priv.size = 0;
2477 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2478 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2479 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2480 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2482 st->codecpar->block_align = track->audio.sub_packet_size;
2483 extradata_offset = 78;
2485 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2486 ret = matroska_parse_flac(s, track, &extradata_offset);
2489 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2490 fourcc = AV_RL32(track->codec_priv.data);
2491 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2492 /* we don't need any value stored in CodecPrivate.
2493 make sure that it's not exported as extradata. */
2494 track->codec_priv.size = 0;
2495 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2496 /* For now, propagate only the OBUs, if any. Once libavcodec is
2497 updated to handle isobmff style extradata this can be removed. */
2498 extradata_offset = 4;
2500 track->codec_priv.size -= extradata_offset;
2502 if (codec_id == AV_CODEC_ID_NONE)
2503 av_log(matroska->ctx, AV_LOG_INFO,
2504 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2506 if (track->time_scale < 0.01)
2507 track->time_scale = 1.0;
2508 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2509 1000 * 1000 * 1000); /* 64 bit pts in ns */
2511 /* convert the delay from ns to the track timebase */
2512 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2513 (AVRational){ 1, 1000000000 },
2516 st->codecpar->codec_id = codec_id;
2518 if (strcmp(track->language, "und"))
2519 av_dict_set(&st->metadata, "language", track->language, 0);
2520 av_dict_set(&st->metadata, "title", track->name, 0);
2522 if (track->flag_default)
2523 st->disposition |= AV_DISPOSITION_DEFAULT;
2524 if (track->flag_forced)
2525 st->disposition |= AV_DISPOSITION_FORCED;
2527 if (!st->codecpar->extradata) {
2529 st->codecpar->extradata = extradata;
2530 st->codecpar->extradata_size = extradata_size;
2531 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2532 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2533 return AVERROR(ENOMEM);
2534 memcpy(st->codecpar->extradata,
2535 track->codec_priv.data + extradata_offset,
2536 track->codec_priv.size);
2540 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2541 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2542 int display_width_mul = 1;
2543 int display_height_mul = 1;
2545 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2546 st->codecpar->codec_tag = fourcc;
2548 st->codecpar->bits_per_coded_sample = bit_depth;
2549 st->codecpar->width = track->video.pixel_width;
2550 st->codecpar->height = track->video.pixel_height;
2552 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2553 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2554 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2555 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2557 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2558 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2560 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2561 av_reduce(&st->sample_aspect_ratio.num,
2562 &st->sample_aspect_ratio.den,
2563 st->codecpar->height * track->video.display_width * display_width_mul,
2564 st->codecpar->width * track->video.display_height * display_height_mul,
2567 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2568 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2570 if (track->default_duration) {
2571 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2572 1000000000, track->default_duration, 30000);
2573 #if FF_API_R_FRAME_RATE
2574 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2575 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2576 st->r_frame_rate = st->avg_frame_rate;
2580 /* export stereo mode flag as metadata tag */
2581 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2582 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2584 /* export alpha mode flag as metadata tag */
2585 if (track->video.alpha_mode)
2586 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2588 /* if we have virtual track, mark the real tracks */
2589 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2591 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2593 snprintf(buf, sizeof(buf), "%s_%d",
2594 ff_matroska_video_stereo_plane[planes[j].type], i);
2595 for (k=0; k < matroska->tracks.nb_elem; k++)
2596 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2597 av_dict_set(&tracks[k].stream->metadata,
2598 "stereo_mode", buf, 0);
2602 // add stream level stereo3d side data if it is a supported format
2603 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2604 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2605 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2610 ret = mkv_parse_video_color(st, track);
2613 ret = mkv_parse_video_projection(st, track);
2616 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2617 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2618 st->codecpar->codec_tag = fourcc;
2619 st->codecpar->sample_rate = track->audio.out_samplerate;
2620 st->codecpar->channels = track->audio.channels;
2621 if (!st->codecpar->bits_per_coded_sample)
2622 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2623 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2624 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2625 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2626 st->need_parsing = AVSTREAM_PARSE_FULL;
2627 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2628 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2629 if (track->codec_delay > 0) {
2630 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2631 (AVRational){1, 1000000000},
2632 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2633 48000 : st->codecpar->sample_rate});
2635 if (track->seek_preroll > 0) {
2636 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2637 (AVRational){1, 1000000000},
2638 (AVRational){1, st->codecpar->sample_rate});
2640 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2641 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2643 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2644 st->disposition |= AV_DISPOSITION_CAPTIONS;
2645 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2646 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2647 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2648 st->disposition |= AV_DISPOSITION_METADATA;
2650 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2651 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2658 static int matroska_read_header(AVFormatContext *s)
2660 MatroskaDemuxContext *matroska = s->priv_data;
2661 EbmlList *attachments_list = &matroska->attachments;
2662 EbmlList *chapters_list = &matroska->chapters;
2663 MatroskaAttachment *attachments;
2664 MatroskaChapter *chapters;
2665 uint64_t max_start = 0;
2671 matroska->cues_parsing_deferred = 1;
2673 /* First read the EBML header. */
2674 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2675 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2676 ebml_free(ebml_syntax, &ebml);
2677 return AVERROR_INVALIDDATA;
2679 if (ebml.version > EBML_VERSION ||
2680 ebml.max_size > sizeof(uint64_t) ||
2681 ebml.id_length > sizeof(uint32_t) ||
2682 ebml.doctype_version > 3) {
2683 avpriv_report_missing_feature(matroska->ctx,
2684 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2685 ebml.version, ebml.doctype, ebml.doctype_version);
2686 ebml_free(ebml_syntax, &ebml);
2687 return AVERROR_PATCHWELCOME;
2688 } else if (ebml.doctype_version == 3) {
2689 av_log(matroska->ctx, AV_LOG_WARNING,
2690 "EBML header using unsupported features\n"
2691 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2692 ebml.version, ebml.doctype, ebml.doctype_version);
2694 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2695 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2697 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2698 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2699 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2700 ebml_free(ebml_syntax, &ebml);
2701 return AVERROR_INVALIDDATA;
2704 ebml_free(ebml_syntax, &ebml);
2706 /* The next thing is a segment. */
2707 pos = avio_tell(matroska->ctx->pb);
2708 res = ebml_parse(matroska, matroska_segments, matroska);
2709 // try resyncing until we find a EBML_STOP type element.
2711 res = matroska_resync(matroska, pos);
2714 pos = avio_tell(matroska->ctx->pb);
2715 res = ebml_parse(matroska, matroska_segment, matroska);
2717 /* Set data_offset as it might be needed later by seek_frame_generic. */
2718 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2719 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2720 matroska_execute_seekhead(matroska);
2722 if (!matroska->time_scale)
2723 matroska->time_scale = 1000000;
2724 if (matroska->duration)
2725 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2726 1000 / AV_TIME_BASE;
2727 av_dict_set(&s->metadata, "title", matroska->title, 0);
2728 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2730 if (matroska->date_utc.size == 8)
2731 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2733 res = matroska_parse_tracks(s);
2737 attachments = attachments_list->elem;
2738 for (j = 0; j < attachments_list->nb_elem; j++) {
2739 if (!(attachments[j].filename && attachments[j].mime &&
2740 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2741 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2743 AVStream *st = avformat_new_stream(s, NULL);
2746 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2747 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2748 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2750 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2751 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2752 strlen(ff_mkv_image_mime_tags[i].str))) {
2753 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2758 attachments[j].stream = st;
2760 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2761 AVPacket *pkt = &st->attached_pic;
2763 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2764 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2766 av_init_packet(pkt);
2767 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2769 return AVERROR(ENOMEM);
2770 pkt->data = attachments[j].bin.data;
2771 pkt->size = attachments[j].bin.size;
2772 pkt->stream_index = st->index;
2773 pkt->flags |= AV_PKT_FLAG_KEY;
2775 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2776 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2778 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2779 attachments[j].bin.size);
2781 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2782 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2783 strlen(ff_mkv_mime_tags[i].str))) {
2784 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2792 chapters = chapters_list->elem;
2793 for (i = 0; i < chapters_list->nb_elem; i++)
2794 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2795 (max_start == 0 || chapters[i].start > max_start)) {
2796 chapters[i].chapter =
2797 avpriv_new_chapter(s, chapters[i].uid,
2798 (AVRational) { 1, 1000000000 },
2799 chapters[i].start, chapters[i].end,
2801 if (chapters[i].chapter) {
2802 av_dict_set(&chapters[i].chapter->metadata,
2803 "title", chapters[i].title, 0);
2805 max_start = chapters[i].start;
2808 matroska_add_index_entries(matroska);
2810 matroska_convert_tags(s);
2814 matroska_read_close(s);
2819 * Put one packet in an application-supplied AVPacket struct.
2820 * Returns 0 on success or -1 on failure.
2822 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2825 if (matroska->queue) {
2826 MatroskaTrack *tracks = matroska->tracks.elem;
2827 MatroskaTrack *track;
2829 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2830 track = &tracks[pkt->stream_index];
2831 if (track->has_palette) {
2832 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2834 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2836 memcpy(pal, track->palette, AVPALETTE_SIZE);
2838 track->has_palette = 0;
2847 * Free all packets in our internal queue.
2849 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2851 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2854 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2855 int *buf_size, int type,
2856 uint32_t **lace_buf, int *laces)
2858 int res = 0, n, size = *buf_size;
2859 uint8_t *data = *buf;
2860 uint32_t *lace_size;
2864 *lace_buf = av_malloc(sizeof(**lace_buf));
2866 return AVERROR(ENOMEM);
2868 *lace_buf[0] = size;
2872 av_assert0(size > 0);
2876 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2878 return AVERROR(ENOMEM);
2881 case 0x1: /* Xiph lacing */
2885 for (n = 0; res == 0 && n < *laces - 1; n++) {
2889 if (size <= total) {
2890 res = AVERROR_INVALIDDATA;
2895 lace_size[n] += temp;
2902 if (size <= total) {
2903 res = AVERROR_INVALIDDATA;
2907 lace_size[n] = size - total;
2911 case 0x2: /* fixed-size lacing */
2912 if (size % (*laces)) {
2913 res = AVERROR_INVALIDDATA;
2916 for (n = 0; n < *laces; n++)
2917 lace_size[n] = size / *laces;
2920 case 0x3: /* EBML lacing */
2924 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2925 if (n < 0 || num > INT_MAX) {
2926 av_log(matroska->ctx, AV_LOG_INFO,
2927 "EBML block data error\n");
2928 res = n<0 ? n : AVERROR_INVALIDDATA;
2933 total = lace_size[0] = num;
2934 for (n = 1; res == 0 && n < *laces - 1; n++) {
2937 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2938 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2939 av_log(matroska->ctx, AV_LOG_INFO,
2940 "EBML block data error\n");
2941 res = r<0 ? r : AVERROR_INVALIDDATA;
2946 lace_size[n] = lace_size[n - 1] + snum;
2947 total += lace_size[n];
2949 if (size <= total) {
2950 res = AVERROR_INVALIDDATA;
2953 lace_size[*laces - 1] = size - total;
2959 *lace_buf = lace_size;
2965 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2966 MatroskaTrack *track, AVStream *st,
2967 uint8_t *data, int size, uint64_t timecode,
2970 int a = st->codecpar->block_align;
2971 int sps = track->audio.sub_packet_size;
2972 int cfs = track->audio.coded_framesize;
2973 int h = track->audio.sub_packet_h;
2974 int y = track->audio.sub_packet_cnt;
2975 int w = track->audio.frame_size;
2978 if (!track->audio.pkt_cnt) {
2979 if (track->audio.sub_packet_cnt == 0)
2980 track->audio.buf_timecode = timecode;
2981 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2982 if (size < cfs * h / 2) {
2983 av_log(matroska->ctx, AV_LOG_ERROR,
2984 "Corrupt int4 RM-style audio packet size\n");
2985 return AVERROR_INVALIDDATA;
2987 for (x = 0; x < h / 2; x++)
2988 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2989 data + x * cfs, cfs);
2990 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2992 av_log(matroska->ctx, AV_LOG_ERROR,
2993 "Corrupt sipr RM-style audio packet size\n");
2994 return AVERROR_INVALIDDATA;
2996 memcpy(track->audio.buf + y * w, data, w);
2998 if (size < sps * w / sps || h<=0 || w%sps) {
2999 av_log(matroska->ctx, AV_LOG_ERROR,
3000 "Corrupt generic RM-style audio packet size\n");
3001 return AVERROR_INVALIDDATA;
3003 for (x = 0; x < w / sps; x++)
3004 memcpy(track->audio.buf +
3005 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3006 data + x * sps, sps);
3009 if (++track->audio.sub_packet_cnt >= h) {
3010 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3011 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3012 track->audio.sub_packet_cnt = 0;
3013 track->audio.pkt_cnt = h * w / a;
3017 while (track->audio.pkt_cnt) {
3019 AVPacket pktl, *pkt = &pktl;
3021 ret = av_new_packet(pkt, a);
3026 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3028 pkt->pts = track->audio.buf_timecode;
3029 track->audio.buf_timecode = AV_NOPTS_VALUE;
3031 pkt->stream_index = st->index;
3032 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3034 av_packet_unref(pkt);
3035 return AVERROR(ENOMEM);
3042 /* reconstruct full wavpack blocks from mangled matroska ones */
3043 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3044 uint8_t **pdst, int *size)
3046 uint8_t *dst = NULL;
3051 int ret, offset = 0;
3053 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3054 return AVERROR_INVALIDDATA;
3056 ver = AV_RL16(track->stream->codecpar->extradata);
3058 samples = AV_RL32(src);
3062 while (srclen >= 8) {
3067 uint32_t flags = AV_RL32(src);
3068 uint32_t crc = AV_RL32(src + 4);
3072 multiblock = (flags & 0x1800) != 0x1800;
3075 ret = AVERROR_INVALIDDATA;
3078 blocksize = AV_RL32(src);
3084 if (blocksize > srclen) {
3085 ret = AVERROR_INVALIDDATA;
3089 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3091 ret = AVERROR(ENOMEM);
3095 dstlen += blocksize + 32;
3097 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3098 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3099 AV_WL16(dst + offset + 8, ver); // version
3100 AV_WL16(dst + offset + 10, 0); // track/index_no
3101 AV_WL32(dst + offset + 12, 0); // total samples
3102 AV_WL32(dst + offset + 16, 0); // block index
3103 AV_WL32(dst + offset + 20, samples); // number of samples
3104 AV_WL32(dst + offset + 24, flags); // flags
3105 AV_WL32(dst + offset + 28, crc); // crc
3106 memcpy(dst + offset + 32, src, blocksize); // block data
3109 srclen -= blocksize;
3110 offset += blocksize + 32;
3113 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3125 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3126 uint8_t **pdst, int *size)
3131 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3132 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3134 return AVERROR(ENOMEM);
3136 AV_WB32(dst, dstlen);
3137 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3138 memcpy(dst + 8, src, dstlen);
3139 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3149 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3150 MatroskaTrack *track,
3152 uint8_t *data, int data_len,
3157 AVPacket pktl, *pkt = &pktl;
3158 uint8_t *id, *settings, *text, *buf;
3159 int id_len, settings_len, text_len;
3164 return AVERROR_INVALIDDATA;
3167 q = data + data_len;
3172 if (*p == '\r' || *p == '\n') {
3181 if (p >= q || *p != '\n')
3182 return AVERROR_INVALIDDATA;
3188 if (*p == '\r' || *p == '\n') {
3189 settings_len = p - settings;
3197 if (p >= q || *p != '\n')
3198 return AVERROR_INVALIDDATA;
3203 while (text_len > 0) {
3204 const int len = text_len - 1;
3205 const uint8_t c = p[len];
3206 if (c != '\r' && c != '\n')
3212 return AVERROR_INVALIDDATA;
3214 err = av_new_packet(pkt, text_len);
3219 memcpy(pkt->data, text, text_len);
3222 buf = av_packet_new_side_data(pkt,
3223 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3226 av_packet_unref(pkt);
3227 return AVERROR(ENOMEM);
3229 memcpy(buf, id, id_len);
3232 if (settings_len > 0) {
3233 buf = av_packet_new_side_data(pkt,
3234 AV_PKT_DATA_WEBVTT_SETTINGS,
3237 av_packet_unref(pkt);
3238 return AVERROR(ENOMEM);
3240 memcpy(buf, settings, settings_len);
3243 // Do we need this for subtitles?
3244 // pkt->flags = AV_PKT_FLAG_KEY;
3246 pkt->stream_index = st->index;
3247 pkt->pts = timecode;
3249 // Do we need this for subtitles?
3250 // pkt->dts = timecode;
3252 pkt->duration = duration;
3255 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3257 av_packet_unref(pkt);
3258 return AVERROR(ENOMEM);
3264 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3265 MatroskaTrack *track, AVStream *st,
3266 AVBufferRef *buf, uint8_t *data, int pkt_size,
3267 uint64_t timecode, uint64_t lace_duration,
3268 int64_t pos, int is_keyframe,
3269 uint8_t *additional, uint64_t additional_id, int additional_size,
3270 int64_t discard_padding)
3272 MatroskaTrackEncoding *encodings = track->encodings.elem;
3273 uint8_t *pkt_data = data;
3275 AVPacket pktl, *pkt = &pktl;
3277 if (encodings && !encodings->type && encodings->scope & 1) {
3278 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3283 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3285 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3287 av_log(matroska->ctx, AV_LOG_ERROR,
3288 "Error parsing a wavpack block.\n");
3291 if (pkt_data != data)
3292 av_freep(&pkt_data);
3296 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3298 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3300 av_log(matroska->ctx, AV_LOG_ERROR,
3301 "Error parsing a prores block.\n");
3304 if (pkt_data != data)
3305 av_freep(&pkt_data);
3309 av_init_packet(pkt);
3310 if (pkt_data != data)
3311 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3314 pkt->buf = av_buffer_ref(buf);
3317 res = AVERROR(ENOMEM);
3321 pkt->data = pkt_data;
3322 pkt->size = pkt_size;
3323 pkt->flags = is_keyframe;
3324 pkt->stream_index = st->index;
3326 if (additional_size > 0) {
3327 uint8_t *side_data = av_packet_new_side_data(pkt,
3328 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3329 additional_size + 8);
3331 av_packet_unref(pkt);
3332 return AVERROR(ENOMEM);
3334 AV_WB64(side_data, additional_id);
3335 memcpy(side_data + 8, additional, additional_size);
3338 if (discard_padding) {
3339 uint8_t *side_data = av_packet_new_side_data(pkt,
3340 AV_PKT_DATA_SKIP_SAMPLES,
3343 av_packet_unref(pkt);
3344 return AVERROR(ENOMEM);
3346 discard_padding = av_rescale_q(discard_padding,
3347 (AVRational){1, 1000000000},
3348 (AVRational){1, st->codecpar->sample_rate});
3349 if (discard_padding > 0) {
3350 AV_WL32(side_data + 4, discard_padding);
3352 AV_WL32(side_data, -discard_padding);
3356 if (track->ms_compat)
3357 pkt->dts = timecode;
3359 pkt->pts = timecode;
3361 pkt->duration = lace_duration;
3363 #if FF_API_CONVERGENCE_DURATION
3364 FF_DISABLE_DEPRECATION_WARNINGS
3365 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3366 pkt->convergence_duration = lace_duration;
3368 FF_ENABLE_DEPRECATION_WARNINGS
3371 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3373 av_packet_unref(pkt);
3374 return AVERROR(ENOMEM);
3380 if (pkt_data != data)
3381 av_freep(&pkt_data);
3385 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3386 int size, int64_t pos, uint64_t cluster_time,
3387 uint64_t block_duration, int is_keyframe,
3388 uint8_t *additional, uint64_t additional_id, int additional_size,
3389 int64_t cluster_pos, int64_t discard_padding)
3391 uint64_t timecode = AV_NOPTS_VALUE;
3392 MatroskaTrack *track;
3396 uint32_t *lace_size = NULL;
3397 int n, flags, laces = 0;
3399 int trust_default_duration = 1;
3401 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3407 track = matroska_find_track_by_num(matroska, num);
3408 if (!track || !track->stream) {
3409 av_log(matroska->ctx, AV_LOG_INFO,
3410 "Invalid stream %"PRIu64"\n", num);
3411 return AVERROR_INVALIDDATA;
3412 } else if (size <= 3)
3415 if (st->discard >= AVDISCARD_ALL)
3417 av_assert1(block_duration != AV_NOPTS_VALUE);
3419 block_time = sign_extend(AV_RB16(data), 16);
3423 if (is_keyframe == -1)
3424 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3426 if (cluster_time != (uint64_t) -1 &&
3427 (block_time >= 0 || cluster_time >= -block_time)) {
3428 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3429 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3430 timecode < track->end_timecode)
3431 is_keyframe = 0; /* overlapping subtitles are not key frame */
3433 ff_reduce_index(matroska->ctx, st->index);
3434 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3439 if (matroska->skip_to_keyframe &&
3440 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3441 // Compare signed timecodes. Timecode may be negative due to codec delay
3442 // offset. We don't support timestamps greater than int64_t anyway - see
3444 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3447 matroska->skip_to_keyframe = 0;
3448 else if (!st->skip_to_keyframe) {
3449 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3450 matroska->skip_to_keyframe = 0;
3454 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3455 &lace_size, &laces);
3460 if (track->audio.samplerate == 8000) {
3461 // If this is needed for more codecs, then add them here
3462 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3463 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3464 trust_default_duration = 0;
3468 if (!block_duration && trust_default_duration)
3469 block_duration = track->default_duration * laces / matroska->time_scale;
3471 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3472 track->end_timecode =
3473 FFMAX(track->end_timecode, timecode + block_duration);
3475 for (n = 0; n < laces; n++) {
3476 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3478 if (lace_size[n] > size) {
3479 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3483 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3484 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3485 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3486 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3487 st->codecpar->block_align && track->audio.sub_packet_size) {
3488 res = matroska_parse_rm_audio(matroska, track, st, data,
3494 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3495 res = matroska_parse_webvtt(matroska, track, st,
3497 timecode, lace_duration,
3502 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3503 timecode, lace_duration, pos,
3504 !n ? is_keyframe : 0,
3505 additional, additional_id, additional_size,
3511 if (timecode != AV_NOPTS_VALUE)
3512 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3513 data += lace_size[n];
3514 size -= lace_size[n];
3522 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3524 MatroskaCluster *cluster = &matroska->current_cluster;
3525 MatroskaBlock *block = &cluster->block;
3527 res = ebml_parse(matroska,
3528 matroska_cluster_parsing,
3533 ebml_level_end(matroska);
3534 cluster->pos = avio_tell(matroska->ctx->pb);
3535 /* sizeof the ID which was already read */
3536 if (matroska->current_id)
3538 res = ebml_parse(matroska,
3541 /* Try parsing the block again. */
3543 res = ebml_parse(matroska,
3544 matroska_cluster_parsing,
3548 if (!res && block->bin.size > 0) {
3549 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3550 uint8_t* additional = block->additional.size > 0 ?
3551 block->additional.data : NULL;
3553 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3554 block->bin.size, block->bin.pos,
3555 matroska->current_cluster.timecode,
3556 block->duration, is_keyframe,
3557 additional, block->additional_id,
3558 block->additional.size,
3560 block->discard_padding);
3563 ebml_free(matroska_blockgroup, block);
3564 memset(block, 0, sizeof(*block));
3569 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3571 MatroskaDemuxContext *matroska = s->priv_data;
3574 while (matroska_deliver_packet(matroska, pkt)) {
3575 int64_t pos = avio_tell(matroska->ctx->pb);
3577 return (ret < 0) ? ret : AVERROR_EOF;
3578 if (matroska_parse_cluster(matroska) < 0)
3579 ret = matroska_resync(matroska, pos);
3585 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3586 int64_t timestamp, int flags)
3588 MatroskaDemuxContext *matroska = s->priv_data;
3589 MatroskaTrack *tracks = NULL;
3590 AVStream *st = s->streams[stream_index];
3593 /* Parse the CUES now since we need the index data to seek. */
3594 if (matroska->cues_parsing_deferred > 0) {
3595 matroska->cues_parsing_deferred = 0;
3596 matroska_parse_cues(matroska);
3599 if (!st->nb_index_entries)
3601 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3603 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3604 matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3605 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3606 matroska_clear_queue(matroska);
3607 if (matroska_parse_cluster(matroska) < 0)
3612 matroska_clear_queue(matroska);
3613 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3616 tracks = matroska->tracks.elem;
3617 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3618 tracks[i].audio.pkt_cnt = 0;
3619 tracks[i].audio.sub_packet_cnt = 0;
3620 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3621 tracks[i].end_timecode = 0;
3624 /* We seek to a level 1 element, so set the appropriate status. */
3625 matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3626 if (flags & AVSEEK_FLAG_ANY) {
3627 st->skip_to_keyframe = 0;
3628 matroska->skip_to_timecode = timestamp;
3630 st->skip_to_keyframe = 1;
3631 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3633 matroska->skip_to_keyframe = 1;
3635 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3638 // slightly hackish but allows proper fallback to
3639 // the generic seeking code.
3640 matroska_reset_status(matroska, 0, -1);
3641 matroska_clear_queue(matroska);
3642 st->skip_to_keyframe =
3643 matroska->skip_to_keyframe = 0;
3648 static int matroska_read_close(AVFormatContext *s)
3650 MatroskaDemuxContext *matroska = s->priv_data;
3651 MatroskaTrack *tracks = matroska->tracks.elem;
3654 matroska_clear_queue(matroska);
3656 for (n = 0; n < matroska->tracks.nb_elem; n++)
3657 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3658 av_freep(&tracks[n].audio.buf);
3659 ebml_free(matroska_segment, matroska);
3665 int64_t start_time_ns;
3666 int64_t end_time_ns;
3667 int64_t start_offset;
3671 /* This function searches all the Cues and returns the CueDesc corresponding to
3672 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3673 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3675 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3676 MatroskaDemuxContext *matroska = s->priv_data;
3679 int nb_index_entries = s->streams[0]->nb_index_entries;
3680 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3681 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3682 for (i = 1; i < nb_index_entries; i++) {
3683 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3684 index_entries[i].timestamp * matroska->time_scale > ts) {
3689 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3690 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3691 if (i != nb_index_entries - 1) {
3692 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3693 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3695 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3696 // FIXME: this needs special handling for files where Cues appear
3697 // before Clusters. the current logic assumes Cues appear after
3699 cue_desc.end_offset = cues_start - matroska->segment_start;
3704 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3706 MatroskaDemuxContext *matroska = s->priv_data;
3707 uint32_t id = matroska->current_id;
3708 int64_t cluster_pos, before_pos;
3710 if (s->streams[0]->nb_index_entries <= 0) return 0;
3711 // seek to the first cluster using cues.
3712 index = av_index_search_timestamp(s->streams[0], 0, 0);
3713 if (index < 0) return 0;
3714 cluster_pos = s->streams[0]->index_entries[index].pos;
3715 before_pos = avio_tell(s->pb);
3717 uint64_t cluster_id, cluster_length;
3720 avio_seek(s->pb, cluster_pos, SEEK_SET);
3721 // read cluster id and length
3722 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3723 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3725 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3729 matroska_reset_status(matroska, 0, cluster_pos);
3730 matroska_clear_queue(matroska);
3731 if (matroska_parse_cluster(matroska) < 0 ||
3735 pkt = &matroska->queue->pkt;
3736 // 4 + read is the length of the cluster id and the cluster length field.
3737 cluster_pos += 4 + read + cluster_length;
3738 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3744 /* Restore the status after matroska_read_header: */
3745 matroska_reset_status(matroska, id, before_pos);
3750 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3751 double min_buffer, double* buffer,
3752 double* sec_to_download, AVFormatContext *s,
3755 double nano_seconds_per_second = 1000000000.0;
3756 double time_sec = time_ns / nano_seconds_per_second;
3758 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3759 int64_t end_time_ns = time_ns + time_to_search_ns;
3760 double sec_downloaded = 0.0;
3761 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3762 if (desc_curr.start_time_ns == -1)
3764 *sec_to_download = 0.0;
3766 // Check for non cue start time.
3767 if (time_ns > desc_curr.start_time_ns) {
3768 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3769 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3770 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3771 double timeToDownload = (cueBytes * 8.0) / bps;
3773 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3774 *sec_to_download += timeToDownload;
3776 // Check if the search ends within the first cue.
3777 if (desc_curr.end_time_ns >= end_time_ns) {
3778 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3779 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3780 sec_downloaded = percent_to_sub * sec_downloaded;
3781 *sec_to_download = percent_to_sub * *sec_to_download;
3784 if ((sec_downloaded + *buffer) <= min_buffer) {
3788 // Get the next Cue.
3789 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3792 while (desc_curr.start_time_ns != -1) {
3793 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3794 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3795 double desc_sec = desc_ns / nano_seconds_per_second;
3796 double bits = (desc_bytes * 8.0);
3797 double time_to_download = bits / bps;
3799 sec_downloaded += desc_sec - time_to_download;
3800 *sec_to_download += time_to_download;
3802 if (desc_curr.end_time_ns >= end_time_ns) {
3803 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3804 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3805 sec_downloaded = percent_to_sub * sec_downloaded;
3806 *sec_to_download = percent_to_sub * *sec_to_download;
3808 if ((sec_downloaded + *buffer) <= min_buffer)
3813 if ((sec_downloaded + *buffer) <= min_buffer) {
3818 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3820 *buffer = *buffer + sec_downloaded;
3824 /* This function computes the bandwidth of the WebM file with the help of
3825 * buffer_size_after_time_downloaded() function. Both of these functions are
3826 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3827 * Matroska parsing mechanism.
3829 * Returns the bandwidth of the file on success; -1 on error.
3831 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3833 MatroskaDemuxContext *matroska = s->priv_data;
3834 AVStream *st = s->streams[0];
3835 double bandwidth = 0.0;
3838 for (i = 0; i < st->nb_index_entries; i++) {
3839 int64_t prebuffer_ns = 1000000000;
3840 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3841 double nano_seconds_per_second = 1000000000.0;
3842 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3843 double prebuffer_bytes = 0.0;
3844 int64_t temp_prebuffer_ns = prebuffer_ns;
3845 int64_t pre_bytes, pre_ns;
3846 double pre_sec, prebuffer, bits_per_second;
3847 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3849 // Start with the first Cue.
3850 CueDesc desc_end = desc_beg;
3852 // Figure out how much data we have downloaded for the prebuffer. This will
3853 // be used later to adjust the bits per sample to try.
3854 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3855 // Prebuffered the entire Cue.
3856 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3857 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3858 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3860 if (desc_end.start_time_ns == -1) {
3861 // The prebuffer is larger than the duration.
3862 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3864 bits_per_second = 0.0;
3866 // The prebuffer ends in the last Cue. Estimate how much data was
3868 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3869 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3870 pre_sec = pre_ns / nano_seconds_per_second;
3872 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3874 prebuffer = prebuffer_ns / nano_seconds_per_second;
3876 // Set this to 0.0 in case our prebuffer buffers the entire video.
3877 bits_per_second = 0.0;
3879 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3880 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3881 double desc_sec = desc_ns / nano_seconds_per_second;
3882 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3884 // Drop the bps by the percentage of bytes buffered.
3885 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3886 double mod_bits_per_second = calc_bits_per_second * percent;
3888 if (prebuffer < desc_sec) {
3890 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3892 // Add 1 so the bits per second should be a little bit greater than file
3894 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3895 const double min_buffer = 0.0;
3896 double buffer = prebuffer;
3897 double sec_to_download = 0.0;
3899 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3900 min_buffer, &buffer, &sec_to_download,
3904 } else if (rv == 0) {
3905 bits_per_second = (double)(bps);
3910 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3911 } while (desc_end.start_time_ns != -1);
3913 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3915 return (int64_t)bandwidth;
3918 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3920 MatroskaDemuxContext *matroska = s->priv_data;
3921 EbmlList *seekhead_list = &matroska->seekhead;
3922 MatroskaSeekhead *seekhead = seekhead_list->elem;
3924 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3928 // determine cues start and end positions
3929 for (i = 0; i < seekhead_list->nb_elem; i++)
3930 if (seekhead[i].id == MATROSKA_ID_CUES)
3933 if (i >= seekhead_list->nb_elem) return -1;
3935 before_pos = avio_tell(matroska->ctx->pb);
3936 cues_start = seekhead[i].pos + matroska->segment_start;
3937 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3938 // cues_end is computed as cues_start + cues_length + length of the
3939 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3940 // cues_end is inclusive and the above sum is reduced by 1.
3941 uint64_t cues_length, cues_id;
3943 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3944 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3945 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3946 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3949 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3951 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3952 if (cues_start == -1 || cues_end == -1) return -1;
3955 matroska_parse_cues(matroska);
3958 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3961 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3963 // if the file has cues at the start, fix up the init range so tht
3964 // it does not include it
3965 if (cues_start <= init_range)
3966 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3969 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3970 if (bandwidth < 0) return -1;
3971 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3973 // check if all clusters start with key frames
3974 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3976 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3977 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3978 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3979 if (!buf) return -1;
3981 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3982 int ret = snprintf(buf + end, 20,
3983 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
3984 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
3985 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3986 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3988 return AVERROR_INVALIDDATA;
3992 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3998 static int webm_dash_manifest_read_header(AVFormatContext *s)
4001 int ret = matroska_read_header(s);
4003 MatroskaTrack *tracks;
4004 MatroskaDemuxContext *matroska = s->priv_data;
4006 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4009 if (!s->nb_streams) {
4010 matroska_read_close(s);
4011 av_log(s, AV_LOG_ERROR, "No streams found\n");
4012 return AVERROR_INVALIDDATA;
4015 if (!matroska->is_live) {
4016 buf = av_asprintf("%g", matroska->duration);
4017 if (!buf) return AVERROR(ENOMEM);
4018 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4021 // initialization range
4022 // 5 is the offset of Cluster ID.
4023 init_range = avio_tell(s->pb) - 5;
4024 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4027 // basename of the file
4028 buf = strrchr(s->url, '/');
4029 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4032 tracks = matroska->tracks.elem;
4033 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4035 // parse the cues and populate Cue related fields
4036 if (!matroska->is_live) {
4037 ret = webm_dash_manifest_cues(s, init_range);
4039 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4044 // use the bandwidth from the command line if it was provided
4045 if (matroska->bandwidth > 0) {
4046 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4047 matroska->bandwidth, 0);
4052 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4057 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4058 static const AVOption options[] = {
4059 { "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 },
4060 { "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 },
4064 static const AVClass webm_dash_class = {
4065 .class_name = "WebM DASH Manifest demuxer",
4066 .item_name = av_default_item_name,
4068 .version = LIBAVUTIL_VERSION_INT,
4071 AVInputFormat ff_matroska_demuxer = {
4072 .name = "matroska,webm",
4073 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4074 .extensions = "mkv,mk3d,mka,mks",
4075 .priv_data_size = sizeof(MatroskaDemuxContext),
4076 .read_probe = matroska_probe,
4077 .read_header = matroska_read_header,
4078 .read_packet = matroska_read_packet,
4079 .read_close = matroska_read_close,
4080 .read_seek = matroska_read_seek,
4081 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4084 AVInputFormat ff_webm_dash_manifest_demuxer = {
4085 .name = "webm_dash_manifest",
4086 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4087 .priv_data_size = sizeof(MatroskaDemuxContext),
4088 .read_header = webm_dash_manifest_read_header,
4089 .read_packet = webm_dash_manifest_read_packet,
4090 .read_close = matroska_read_close,
4091 .priv_class = &webm_dash_class,