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];
346 EbmlList attachments;
352 /* byte position of the segment inside the stream */
353 int64_t segment_start;
355 /* the packet queue */
357 AVPacketList *queue_end;
361 /* What to skip before effectively reading a packet. */
362 int skip_to_keyframe;
363 uint64_t skip_to_timecode;
365 /* File has a CUES element, but we defer parsing until it is needed. */
366 int cues_parsing_deferred;
368 /* Level1 elements and whether they were read yet */
369 MatroskaLevel1Element level1_elems[64];
370 int num_level1_elems;
372 MatroskaCluster current_cluster;
374 /* WebM DASH Manifest live flag */
377 /* Bandwidth value for WebM DASH Manifest */
379 } MatroskaDemuxContext;
381 static const EbmlSyntax ebml_header[] = {
382 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
383 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
384 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
385 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
386 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
387 { EBML_ID_EBMLVERSION, EBML_NONE },
388 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
392 static const EbmlSyntax ebml_syntax[] = {
393 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
397 static const EbmlSyntax matroska_info[] = {
398 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
399 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
400 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
401 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
402 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
403 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
404 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
408 static const EbmlSyntax matroska_mastering_meta[] = {
409 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
410 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
422 static const EbmlSyntax matroska_track_video_color[] = {
423 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
424 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
425 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
430 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
431 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
432 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
436 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
440 static const EbmlSyntax matroska_track_video_projection[] = {
441 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
442 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
443 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
445 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
449 static const EbmlSyntax matroska_track_video[] = {
450 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
451 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
452 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
453 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
454 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
455 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
456 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
457 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
458 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
459 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
460 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
462 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
463 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
464 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
465 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
466 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
467 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
471 static const EbmlSyntax matroska_track_audio[] = {
472 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
473 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
474 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
475 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
479 static const EbmlSyntax matroska_track_encoding_compression[] = {
480 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
481 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
485 static const EbmlSyntax matroska_track_encoding_encryption[] = {
486 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
487 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
488 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
489 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
495 static const EbmlSyntax matroska_track_encoding[] = {
496 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
497 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
498 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
499 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
500 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
504 static const EbmlSyntax matroska_track_encodings[] = {
505 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
509 static const EbmlSyntax matroska_track_plane[] = {
510 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
511 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
515 static const EbmlSyntax matroska_track_combine_planes[] = {
516 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
520 static const EbmlSyntax matroska_track_operation[] = {
521 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
525 static const EbmlSyntax matroska_track[] = {
526 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
527 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
528 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
529 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
530 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
531 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
532 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
533 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
534 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
535 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
536 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
537 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
538 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
539 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
540 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
541 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
542 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
543 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
544 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
545 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
546 { MATROSKA_ID_CODECNAME, EBML_NONE },
547 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
548 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
549 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
550 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
551 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
555 static const EbmlSyntax matroska_tracks[] = {
556 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
560 static const EbmlSyntax matroska_attachment[] = {
561 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
562 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
563 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
564 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
565 { MATROSKA_ID_FILEDESC, EBML_NONE },
569 static const EbmlSyntax matroska_attachments[] = {
570 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
574 static const EbmlSyntax matroska_chapter_display[] = {
575 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
576 { MATROSKA_ID_CHAPLANG, EBML_NONE },
577 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
581 static const EbmlSyntax matroska_chapter_entry[] = {
582 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
583 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
584 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
585 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
586 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
587 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
588 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
589 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
593 static const EbmlSyntax matroska_chapter[] = {
594 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
595 { MATROSKA_ID_EDITIONUID, EBML_NONE },
596 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
598 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
602 static const EbmlSyntax matroska_chapters[] = {
603 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
607 static const EbmlSyntax matroska_index_pos[] = {
608 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
609 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
610 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
611 { MATROSKA_ID_CUEDURATION, EBML_NONE },
612 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
616 static const EbmlSyntax matroska_index_entry[] = {
617 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
618 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
622 static const EbmlSyntax matroska_index[] = {
623 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
627 static const EbmlSyntax matroska_simpletag[] = {
628 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
629 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
630 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
631 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
632 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
633 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
637 static const EbmlSyntax matroska_tagtargets[] = {
638 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
639 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
640 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
641 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
642 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
646 static const EbmlSyntax matroska_tag[] = {
647 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
648 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
652 static const EbmlSyntax matroska_tags[] = {
653 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
657 static const EbmlSyntax matroska_seekhead_entry[] = {
658 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
659 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
663 static const EbmlSyntax matroska_seekhead[] = {
664 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
668 static const EbmlSyntax matroska_segment[] = {
669 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
670 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
671 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
672 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
673 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
674 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
675 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
676 { MATROSKA_ID_CLUSTER, EBML_STOP },
680 static const EbmlSyntax matroska_segments[] = {
681 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
685 static const EbmlSyntax matroska_blockmore[] = {
686 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
687 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
691 static const EbmlSyntax matroska_blockadditions[] = {
692 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
696 static const EbmlSyntax matroska_blockgroup[] = {
697 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
698 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
699 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
700 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
701 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
702 { MATROSKA_ID_CODECSTATE, EBML_NONE },
703 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
707 static const EbmlSyntax matroska_cluster_parsing[] = {
708 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
709 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
710 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
711 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
712 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
713 { MATROSKA_ID_INFO, EBML_NONE },
714 { MATROSKA_ID_CUES, EBML_NONE },
715 { MATROSKA_ID_TAGS, EBML_NONE },
716 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
717 { MATROSKA_ID_CLUSTER, EBML_STOP },
721 static const EbmlSyntax matroska_cluster[] = {
722 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
723 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
724 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
725 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
726 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
730 static const EbmlSyntax matroska_clusters[] = {
731 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
732 { MATROSKA_ID_INFO, EBML_NONE },
733 { MATROSKA_ID_CUES, EBML_NONE },
734 { MATROSKA_ID_TAGS, EBML_NONE },
735 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
739 static const char *const matroska_doctypes[] = { "matroska", "webm" };
741 static int matroska_read_close(AVFormatContext *s);
744 * This function prepares the status for parsing of level 1 elements.
746 static int matroska_reset_status(MatroskaDemuxContext *matroska,
747 uint32_t id, int64_t position)
750 int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
755 matroska->current_id = id;
756 matroska->num_levels = 1;
757 matroska->current_cluster.pos = 0;
758 matroska->resync_pos = avio_tell(matroska->ctx->pb);
760 matroska->resync_pos -= (av_log2(id) + 7) / 8;
765 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
767 AVIOContext *pb = matroska->ctx->pb;
770 /* Try to seek to the last position to resync from. If this doesn't work,
771 * we resync from the earliest position available: The start of the buffer. */
772 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
773 av_log(matroska->ctx, AV_LOG_WARNING,
774 "Seek to desired resync point failed. Seeking to "
775 "earliest point available instead.\n");
776 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
777 last_pos + 1), SEEK_SET);
782 // try to find a toplevel element
783 while (!avio_feof(pb)) {
784 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
785 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
786 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
787 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
788 /* Prepare the context for parsing of a level 1 element. */
789 matroska_reset_status(matroska, id, -1);
790 /* Given that we are here means that an error has occured,
791 * so treat the segment as unknown length in order not to
792 * discard valid data that happens to be beyond the designated
793 * end of the segment. */
794 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
797 id = (id << 8) | avio_r8(pb);
801 return pb->error ? pb->error : AVERROR_EOF;
805 * Return: Whether we reached the end of a level in the hierarchy or not.
807 static int ebml_level_end(MatroskaDemuxContext *matroska)
809 AVIOContext *pb = matroska->ctx->pb;
810 int64_t pos = avio_tell(pb);
812 if (matroska->num_levels > 0) {
813 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
814 if (pos - level->start >= level->length || matroska->current_id) {
815 matroska->num_levels--;
819 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
823 * Read: an "EBML number", which is defined as a variable-length
824 * array of bytes. The first byte indicates the length by giving a
825 * number of 0-bits followed by a one. The position of the first
826 * "one" bit inside the first byte indicates the length of this
828 * Returns: number of bytes read, < 0 on error
830 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
831 int max_size, uint64_t *number, int eof_forbidden)
837 /* The first byte tells us the length in bytes - except when it is zero. */
842 /* get the length of the EBML number */
843 read = 8 - ff_log2_tab[total];
845 if (!total || read > max_size) {
846 pos = avio_tell(pb) - 1;
848 av_log(matroska->ctx, AV_LOG_ERROR,
849 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
850 "of an EBML number\n", pos, pos);
852 av_log(matroska->ctx, AV_LOG_ERROR,
853 "Length %d indicated by an EBML number's first byte 0x%02x "
854 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
855 read, (uint8_t) total, pos, pos, max_size);
857 return AVERROR_INVALIDDATA;
860 /* read out length */
861 total ^= 1 << ff_log2_tab[total];
863 total = (total << 8) | avio_r8(pb);
865 if (pb->eof_reached) {
877 av_log(matroska->ctx, AV_LOG_ERROR,
878 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
883 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
884 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
891 * Read a EBML length value.
892 * This needs special handling for the "unknown length" case which has multiple
895 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
898 int res = ebml_read_num(matroska, pb, 8, number, 1);
899 if (res > 0 && *number + 1 == 1ULL << (7 * res))
900 *number = EBML_UNKNOWN_LENGTH;
905 * Read the next element as an unsigned int.
906 * Returns NEEDS_CHECKING.
908 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
912 /* big-endian ordering; build up number */
915 *num = (*num << 8) | avio_r8(pb);
917 return NEEDS_CHECKING;
921 * Read the next element as a signed int.
922 * Returns NEEDS_CHECKING.
924 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
931 *num = sign_extend(avio_r8(pb), 8);
933 /* big-endian ordering; build up number */
935 *num = ((uint64_t)*num << 8) | avio_r8(pb);
938 return NEEDS_CHECKING;
942 * Read the next element as a float.
943 * Returns NEEDS_CHECKING or < 0 on obvious failure.
945 static int ebml_read_float(AVIOContext *pb, int size, double *num)
950 *num = av_int2float(avio_rb32(pb));
952 *num = av_int2double(avio_rb64(pb));
954 return AVERROR_INVALIDDATA;
956 return NEEDS_CHECKING;
960 * Read the next element as an ASCII string.
961 * 0 is success, < 0 or NEEDS_CHECKING is failure.
963 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
968 /* EBML strings are usually not 0-terminated, so we allocate one
969 * byte more, read the string and NULL-terminate it ourselves. */
970 if (!(res = av_malloc(size + 1)))
971 return AVERROR(ENOMEM);
972 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
974 return ret < 0 ? ret : NEEDS_CHECKING;
984 * Read the next element as binary data.
985 * 0 is success, < 0 or NEEDS_CHECKING is failure.
987 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
991 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
994 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
996 bin->data = bin->buf->data;
998 bin->pos = avio_tell(pb);
999 if ((ret = avio_read(pb, bin->data, length)) != length) {
1000 av_buffer_unref(&bin->buf);
1003 return ret < 0 ? ret : NEEDS_CHECKING;
1010 * Read the next element, but only the header. The contents
1011 * are supposed to be sub-elements which can be read separately.
1012 * 0 is success, < 0 is failure.
1014 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
1016 AVIOContext *pb = matroska->ctx->pb;
1017 MatroskaLevel *level;
1019 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1020 av_log(matroska->ctx, AV_LOG_ERROR,
1021 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1022 return AVERROR(ENOSYS);
1025 level = &matroska->levels[matroska->num_levels++];
1026 level->start = avio_tell(pb);
1027 level->length = length;
1033 * Read signed/unsigned "EBML" numbers.
1034 * Return: number of bytes processed, < 0 on error
1036 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1037 uint8_t *data, uint32_t size, uint64_t *num)
1040 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1041 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1045 * Same as above, but signed.
1047 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1048 uint8_t *data, uint32_t size, int64_t *num)
1053 /* read as unsigned number first */
1054 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1057 /* make signed (weird way) */
1058 *num = unum - ((1LL << (7 * res - 1)) - 1);
1063 static int ebml_parse(MatroskaDemuxContext *matroska,
1064 EbmlSyntax *syntax, void *data);
1066 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1069 for (i = 0; syntax[i].id; i++)
1070 if (id == syntax[i].id)
1076 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1081 for (i = 0; syntax[i].id; i++)
1082 switch (syntax[i].type) {
1084 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1087 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1090 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1094 // the default may be NULL
1095 if (syntax[i].def.s) {
1096 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1097 *dst = av_strdup(syntax[i].def.s);
1099 return AVERROR(ENOMEM);
1104 while (!res && !ebml_level_end(matroska))
1105 res = ebml_parse(matroska, syntax, data);
1110 static int is_ebml_id_valid(uint32_t id)
1112 // Due to endian nonsense in Matroska, the highest byte with any bits set
1113 // will contain the leading length bit. This bit in turn identifies the
1114 // total byte length of the element by its position within the byte.
1115 unsigned int bits = av_log2(id);
1116 return id && (bits + 7) / 8 == (8 - bits % 8);
1120 * Allocate and return the entry for the level1 element with the given ID. If
1121 * an entry already exists, return the existing entry.
1123 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1127 MatroskaLevel1Element *elem;
1129 if (!is_ebml_id_valid(id))
1132 // Some files link to all clusters; useless.
1133 if (id == MATROSKA_ID_CLUSTER)
1136 // There can be multiple seekheads.
1137 if (id != MATROSKA_ID_SEEKHEAD) {
1138 for (i = 0; i < matroska->num_level1_elems; i++) {
1139 if (matroska->level1_elems[i].id == id)
1140 return &matroska->level1_elems[i];
1144 // Only a completely broken file would have more elements.
1145 // It also provides a low-effort way to escape from circular seekheads
1146 // (every iteration will add a level1 entry).
1147 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1148 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1152 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1153 *elem = (MatroskaLevel1Element){.id = id};
1158 static int ebml_parse(MatroskaDemuxContext *matroska,
1159 EbmlSyntax *syntax, void *data)
1161 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1165 // max. 16 MB for strings
1166 [EBML_STR] = 0x1000000,
1167 [EBML_UTF8] = 0x1000000,
1168 // max. 256 MB for binary data
1169 [EBML_BIN] = 0x10000000,
1170 // no limits for anything else
1172 AVIOContext *pb = matroska->ctx->pb;
1175 int64_t pos = avio_tell(pb);
1176 int res, update_pos = 1;
1178 MatroskaLevel1Element *level1_elem;
1180 if (!matroska->current_id) {
1182 res = ebml_read_num(matroska, pb, 4, &id, 0);
1184 // in live mode, finish parsing if EOF is reached.
1185 return (matroska->is_live && pb->eof_reached &&
1186 res == AVERROR_EOF) ? 1 : res;
1188 matroska->current_id = id | 1 << 7 * res;
1190 pos -= (av_log2(matroska->current_id) + 7) / 8;
1192 id = matroska->current_id;
1194 syntax = ebml_parse_id(syntax, id);
1195 if (!syntax->id && id == MATROSKA_ID_CLUSTER &&
1196 matroska->num_levels > 0 &&
1197 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1198 return 0; // we reached the end of an unknown size cluster
1199 if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1200 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1204 data = (char *) data + syntax->data_offset;
1205 if (syntax->list_elem_size) {
1206 EbmlList *list = data;
1207 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1209 return AVERROR(ENOMEM);
1210 list->elem = newelem;
1211 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1212 memset(data, 0, syntax->list_elem_size);
1216 if (syntax->type != EBML_STOP) {
1217 matroska->current_id = 0;
1218 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1220 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1221 av_log(matroska->ctx, AV_LOG_ERROR,
1222 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1223 length, max_lengths[syntax->type], syntax->type);
1224 return AVERROR_INVALIDDATA;
1226 if (matroska->num_levels > 0) {
1227 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1228 AVIOContext *pb = matroska->ctx->pb;
1229 int64_t pos = avio_tell(pb);
1231 if (length != EBML_UNKNOWN_LENGTH &&
1232 level->length != EBML_UNKNOWN_LENGTH) {
1233 uint64_t elem_end = pos + length,
1234 level_end = level->start + level->length;
1236 if (level_end < elem_end) {
1237 av_log(matroska->ctx, AV_LOG_ERROR,
1238 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1239 "containing master element ending at 0x%"PRIx64"\n",
1240 pos, elem_end, level_end);
1241 return AVERROR_INVALIDDATA;
1243 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1244 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1245 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1246 return AVERROR_INVALIDDATA;
1247 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1248 // According to the specifications only clusters and segments
1249 // are allowed to be unknown-sized.
1250 av_log(matroska->ctx, AV_LOG_ERROR,
1251 "Found unknown-sized element other than a cluster at "
1252 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1253 return AVERROR_INVALIDDATA;
1258 // We have found an element that is allowed at this place
1259 // in the hierarchy and it passed all checks, so treat the beginning
1260 // of the element as the "last known good" position.
1261 matroska->resync_pos = pos;
1265 switch (syntax->type) {
1267 res = ebml_read_uint(pb, length, data);
1270 res = ebml_read_sint(pb, length, data);
1273 res = ebml_read_float(pb, length, data);
1277 res = ebml_read_ascii(pb, length, data);
1280 res = ebml_read_binary(pb, length, data);
1284 if ((res = ebml_read_master(matroska, length)) < 0)
1286 if (id == MATROSKA_ID_SEGMENT)
1287 matroska->segment_start = avio_tell(matroska->ctx->pb);
1288 if (id == MATROSKA_ID_CUES)
1289 matroska->cues_parsing_deferred = 0;
1290 if (syntax->type == EBML_LEVEL1 &&
1291 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1292 if (level1_elem->parsed)
1293 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1294 level1_elem->parsed = 1;
1296 return ebml_parse_nest(matroska, syntax->def.n, data);
1302 if (ffio_limit(pb, length) != length) {
1303 // ffio_limit emits its own error message,
1304 // so we don't have to.
1305 return AVERROR(EIO);
1307 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1308 // avio_skip might take us past EOF. We check for this
1309 // by skipping only length - 1 bytes, reading a byte and
1310 // checking the error flags. This is done in order to check
1311 // that the element has been properly skipped even when
1312 // no filesize (that ffio_limit relies on) is available.
1314 res = NEEDS_CHECKING;
1321 if (res == NEEDS_CHECKING) {
1322 if (pb->eof_reached) {
1331 if (res == AVERROR_INVALIDDATA)
1332 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1333 else if (res == AVERROR(EIO))
1334 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1335 else if (res == AVERROR_EOF) {
1336 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1343 static void ebml_free(EbmlSyntax *syntax, void *data)
1346 for (i = 0; syntax[i].id; i++) {
1347 void *data_off = (char *) data + syntax[i].data_offset;
1348 switch (syntax[i].type) {
1354 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1358 if (syntax[i].list_elem_size) {
1359 EbmlList *list = data_off;
1360 char *ptr = list->elem;
1361 for (j = 0; j < list->nb_elem;
1362 j++, ptr += syntax[i].list_elem_size)
1363 ebml_free(syntax[i].def.n, ptr);
1364 av_freep(&list->elem);
1367 ebml_free(syntax[i].def.n, data_off);
1377 static int matroska_probe(const AVProbeData *p)
1380 int len_mask = 0x80, size = 1, n = 1, i;
1383 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1386 /* length of header */
1388 while (size <= 8 && !(total & len_mask)) {
1394 total &= (len_mask - 1);
1396 total = (total << 8) | p->buf[4 + n++];
1398 /* Does the probe data contain the whole header? */
1399 if (p->buf_size < 4 + size + total)
1402 /* The header should contain a known document type. For now,
1403 * we don't parse the whole header but simply check for the
1404 * availability of that array of characters inside the header.
1405 * Not fully fool-proof, but good enough. */
1406 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1407 size_t probelen = strlen(matroska_doctypes[i]);
1408 if (total < probelen)
1410 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1411 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1412 return AVPROBE_SCORE_MAX;
1415 // probably valid EBML header but no recognized doctype
1416 return AVPROBE_SCORE_EXTENSION;
1419 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1422 MatroskaTrack *tracks = matroska->tracks.elem;
1425 for (i = 0; i < matroska->tracks.nb_elem; i++)
1426 if (tracks[i].num == num)
1429 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1433 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1434 MatroskaTrack *track)
1436 MatroskaTrackEncoding *encodings = track->encodings.elem;
1437 uint8_t *data = *buf;
1438 int isize = *buf_size;
1439 uint8_t *pkt_data = NULL;
1440 uint8_t av_unused *newpktdata;
1441 int pkt_size = isize;
1445 if (pkt_size >= 10000000U)
1446 return AVERROR_INVALIDDATA;
1448 switch (encodings[0].compression.algo) {
1449 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1451 int header_size = encodings[0].compression.settings.size;
1452 uint8_t *header = encodings[0].compression.settings.data;
1454 if (header_size && !header) {
1455 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1462 pkt_size = isize + header_size;
1463 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1465 return AVERROR(ENOMEM);
1467 memcpy(pkt_data, header, header_size);
1468 memcpy(pkt_data + header_size, data, isize);
1472 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1474 olen = pkt_size *= 3;
1475 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1476 + AV_INPUT_BUFFER_PADDING_SIZE);
1478 result = AVERROR(ENOMEM);
1481 pkt_data = newpktdata;
1482 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1483 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1485 result = AVERROR_INVALIDDATA;
1492 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1494 z_stream zstream = { 0 };
1495 if (inflateInit(&zstream) != Z_OK)
1497 zstream.next_in = data;
1498 zstream.avail_in = isize;
1501 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1503 inflateEnd(&zstream);
1504 result = AVERROR(ENOMEM);
1507 pkt_data = newpktdata;
1508 zstream.avail_out = pkt_size - zstream.total_out;
1509 zstream.next_out = pkt_data + zstream.total_out;
1510 result = inflate(&zstream, Z_NO_FLUSH);
1511 } while (result == Z_OK && pkt_size < 10000000);
1512 pkt_size = zstream.total_out;
1513 inflateEnd(&zstream);
1514 if (result != Z_STREAM_END) {
1515 if (result == Z_MEM_ERROR)
1516 result = AVERROR(ENOMEM);
1518 result = AVERROR_INVALIDDATA;
1525 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1527 bz_stream bzstream = { 0 };
1528 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1530 bzstream.next_in = data;
1531 bzstream.avail_in = isize;
1534 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1536 BZ2_bzDecompressEnd(&bzstream);
1537 result = AVERROR(ENOMEM);
1540 pkt_data = newpktdata;
1541 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1542 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1543 result = BZ2_bzDecompress(&bzstream);
1544 } while (result == BZ_OK && pkt_size < 10000000);
1545 pkt_size = bzstream.total_out_lo32;
1546 BZ2_bzDecompressEnd(&bzstream);
1547 if (result != BZ_STREAM_END) {
1548 if (result == BZ_MEM_ERROR)
1549 result = AVERROR(ENOMEM);
1551 result = AVERROR_INVALIDDATA;
1558 return AVERROR_INVALIDDATA;
1561 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1564 *buf_size = pkt_size;
1572 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1573 AVDictionary **metadata, char *prefix)
1575 MatroskaTag *tags = list->elem;
1579 for (i = 0; i < list->nb_elem; i++) {
1580 const char *lang = tags[i].lang &&
1581 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1583 if (!tags[i].name) {
1584 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1588 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1590 av_strlcpy(key, tags[i].name, sizeof(key));
1591 if (tags[i].def || !lang) {
1592 av_dict_set(metadata, key, tags[i].string, 0);
1593 if (tags[i].sub.nb_elem)
1594 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1597 av_strlcat(key, "-", sizeof(key));
1598 av_strlcat(key, lang, sizeof(key));
1599 av_dict_set(metadata, key, tags[i].string, 0);
1600 if (tags[i].sub.nb_elem)
1601 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1604 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1607 static void matroska_convert_tags(AVFormatContext *s)
1609 MatroskaDemuxContext *matroska = s->priv_data;
1610 MatroskaTags *tags = matroska->tags.elem;
1613 for (i = 0; i < matroska->tags.nb_elem; i++) {
1614 if (tags[i].target.attachuid) {
1615 MatroskaAttachment *attachment = matroska->attachments.elem;
1617 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1618 if (attachment[j].uid == tags[i].target.attachuid &&
1619 attachment[j].stream) {
1620 matroska_convert_tag(s, &tags[i].tag,
1621 &attachment[j].stream->metadata, NULL);
1626 av_log(NULL, AV_LOG_WARNING,
1627 "The tags at index %d refer to a "
1628 "non-existent attachment %"PRId64".\n",
1629 i, tags[i].target.attachuid);
1631 } else if (tags[i].target.chapteruid) {
1632 MatroskaChapter *chapter = matroska->chapters.elem;
1634 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1635 if (chapter[j].uid == tags[i].target.chapteruid &&
1636 chapter[j].chapter) {
1637 matroska_convert_tag(s, &tags[i].tag,
1638 &chapter[j].chapter->metadata, NULL);
1643 av_log(NULL, AV_LOG_WARNING,
1644 "The tags at index %d refer to a non-existent chapter "
1646 i, tags[i].target.chapteruid);
1648 } else if (tags[i].target.trackuid) {
1649 MatroskaTrack *track = matroska->tracks.elem;
1651 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1652 if (track[j].uid == tags[i].target.trackuid &&
1654 matroska_convert_tag(s, &tags[i].tag,
1655 &track[j].stream->metadata, NULL);
1660 av_log(NULL, AV_LOG_WARNING,
1661 "The tags at index %d refer to a non-existent track "
1663 i, tags[i].target.trackuid);
1666 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1667 tags[i].target.type);
1672 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1675 uint32_t saved_id = matroska->current_id;
1676 int64_t before_pos = avio_tell(matroska->ctx->pb);
1677 MatroskaLevel level;
1682 offset = pos + matroska->segment_start;
1683 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1684 /* We don't want to lose our seekhead level, so we add
1685 * a dummy. This is a crude hack. */
1686 if (matroska->num_levels == EBML_MAX_DEPTH) {
1687 av_log(matroska->ctx, AV_LOG_INFO,
1688 "Max EBML element depth (%d) reached, "
1689 "cannot parse further.\n", EBML_MAX_DEPTH);
1690 ret = AVERROR_INVALIDDATA;
1693 level.length = EBML_UNKNOWN_LENGTH;
1694 matroska->levels[matroska->num_levels] = level;
1695 matroska->num_levels++;
1696 matroska->current_id = 0;
1698 ret = ebml_parse(matroska, matroska_segment, matroska);
1701 /* Seek back - notice that in all instances where this is used it is safe
1702 * to set the level to 1 and unset the position of the current cluster. */
1703 matroska_reset_status(matroska, saved_id, before_pos);
1708 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1710 EbmlList *seekhead_list = &matroska->seekhead;
1713 // we should not do any seeking in the streaming case
1714 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1717 for (i = 0; i < seekhead_list->nb_elem; i++) {
1718 MatroskaSeekhead *seekheads = seekhead_list->elem;
1719 uint32_t id = seekheads[i].id;
1720 uint64_t pos = seekheads[i].pos;
1722 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1723 if (!elem || elem->parsed)
1728 // defer cues parsing until we actually need cue data.
1729 if (id == MATROSKA_ID_CUES)
1732 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1733 // mark index as broken
1734 matroska->cues_parsing_deferred = -1;
1742 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1744 EbmlList *index_list;
1745 MatroskaIndex *index;
1746 uint64_t index_scale = 1;
1749 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1752 index_list = &matroska->index;
1753 index = index_list->elem;
1754 if (index_list->nb_elem < 2)
1756 if (index[1].time > 1E14 / matroska->time_scale) {
1757 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1760 for (i = 0; i < index_list->nb_elem; i++) {
1761 EbmlList *pos_list = &index[i].pos;
1762 MatroskaIndexPos *pos = pos_list->elem;
1763 for (j = 0; j < pos_list->nb_elem; j++) {
1764 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1766 if (track && track->stream)
1767 av_add_index_entry(track->stream,
1768 pos[j].pos + matroska->segment_start,
1769 index[i].time / index_scale, 0, 0,
1775 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1778 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1781 for (i = 0; i < matroska->num_level1_elems; i++) {
1782 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1783 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1784 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1785 matroska->cues_parsing_deferred = -1;
1791 matroska_add_index_entries(matroska);
1794 static int matroska_aac_profile(char *codec_id)
1796 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1799 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1800 if (strstr(codec_id, aac_profiles[profile]))
1805 static int matroska_aac_sri(int samplerate)
1809 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1810 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1815 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1817 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1818 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1821 static int matroska_parse_flac(AVFormatContext *s,
1822 MatroskaTrack *track,
1825 AVStream *st = track->stream;
1826 uint8_t *p = track->codec_priv.data;
1827 int size = track->codec_priv.size;
1829 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1830 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1831 track->codec_priv.size = 0;
1835 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1837 p += track->codec_priv.size;
1838 size -= track->codec_priv.size;
1840 /* parse the remaining metadata blocks if present */
1842 int block_last, block_type, block_size;
1844 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1848 if (block_size > size)
1851 /* check for the channel mask */
1852 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1853 AVDictionary *dict = NULL;
1854 AVDictionaryEntry *chmask;
1856 ff_vorbis_comment(s, &dict, p, block_size, 0);
1857 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1859 uint64_t mask = strtol(chmask->value, NULL, 0);
1860 if (!mask || mask & ~0x3ffffULL) {
1861 av_log(s, AV_LOG_WARNING,
1862 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1864 st->codecpar->channel_layout = mask;
1866 av_dict_free(&dict);
1876 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1878 int major, minor, micro, bttb = 0;
1880 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1881 * this function, and fixed in 57.52 */
1882 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1883 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1885 switch (field_order) {
1886 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1887 return AV_FIELD_PROGRESSIVE;
1888 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1889 return AV_FIELD_UNKNOWN;
1890 case MATROSKA_VIDEO_FIELDORDER_TT:
1892 case MATROSKA_VIDEO_FIELDORDER_BB:
1894 case MATROSKA_VIDEO_FIELDORDER_BT:
1895 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1896 case MATROSKA_VIDEO_FIELDORDER_TB:
1897 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1899 return AV_FIELD_UNKNOWN;
1903 static void mkv_stereo_mode_display_mul(int stereo_mode,
1904 int *h_width, int *h_height)
1906 switch (stereo_mode) {
1907 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1908 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1909 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1910 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1911 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1913 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1914 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1915 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1916 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1919 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1920 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1921 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1922 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1928 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1929 const MatroskaTrackVideoColor *color = track->video.color.elem;
1930 const MatroskaMasteringMeta *mastering_meta;
1931 int has_mastering_primaries, has_mastering_luminance;
1933 if (!track->video.color.nb_elem)
1936 mastering_meta = &color->mastering_meta;
1937 // Mastering primaries are CIE 1931 coords, and must be > 0.
1938 has_mastering_primaries =
1939 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1940 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1941 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1942 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1943 has_mastering_luminance = mastering_meta->max_luminance > 0;
1945 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1946 st->codecpar->color_space = color->matrix_coefficients;
1947 if (color->primaries != AVCOL_PRI_RESERVED &&
1948 color->primaries != AVCOL_PRI_RESERVED0)
1949 st->codecpar->color_primaries = color->primaries;
1950 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1951 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1952 st->codecpar->color_trc = color->transfer_characteristics;
1953 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1954 color->range <= AVCOL_RANGE_JPEG)
1955 st->codecpar->color_range = color->range;
1956 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1957 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1958 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1959 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1960 st->codecpar->chroma_location =
1961 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1962 (color->chroma_siting_vert - 1) << 7);
1964 if (color->max_cll && color->max_fall) {
1967 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1969 return AVERROR(ENOMEM);
1970 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1971 (uint8_t *)metadata, size);
1973 av_freep(&metadata);
1976 metadata->MaxCLL = color->max_cll;
1977 metadata->MaxFALL = color->max_fall;
1980 if (has_mastering_primaries || has_mastering_luminance) {
1981 // Use similar rationals as other standards.
1982 const int chroma_den = 50000;
1983 const int luma_den = 10000;
1984 AVMasteringDisplayMetadata *metadata =
1985 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1986 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1987 sizeof(AVMasteringDisplayMetadata));
1989 return AVERROR(ENOMEM);
1991 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1992 if (has_mastering_primaries) {
1993 metadata->display_primaries[0][0] = av_make_q(
1994 round(mastering_meta->r_x * chroma_den), chroma_den);
1995 metadata->display_primaries[0][1] = av_make_q(
1996 round(mastering_meta->r_y * chroma_den), chroma_den);
1997 metadata->display_primaries[1][0] = av_make_q(
1998 round(mastering_meta->g_x * chroma_den), chroma_den);
1999 metadata->display_primaries[1][1] = av_make_q(
2000 round(mastering_meta->g_y * chroma_den), chroma_den);
2001 metadata->display_primaries[2][0] = av_make_q(
2002 round(mastering_meta->b_x * chroma_den), chroma_den);
2003 metadata->display_primaries[2][1] = av_make_q(
2004 round(mastering_meta->b_y * chroma_den), chroma_den);
2005 metadata->white_point[0] = av_make_q(
2006 round(mastering_meta->white_x * chroma_den), chroma_den);
2007 metadata->white_point[1] = av_make_q(
2008 round(mastering_meta->white_y * chroma_den), chroma_den);
2009 metadata->has_primaries = 1;
2011 if (has_mastering_luminance) {
2012 metadata->max_luminance = av_make_q(
2013 round(mastering_meta->max_luminance * luma_den), luma_den);
2014 metadata->min_luminance = av_make_q(
2015 round(mastering_meta->min_luminance * luma_den), luma_den);
2016 metadata->has_luminance = 1;
2022 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2023 AVSphericalMapping *spherical;
2024 enum AVSphericalProjection projection;
2025 size_t spherical_size;
2026 uint32_t l = 0, t = 0, r = 0, b = 0;
2027 uint32_t padding = 0;
2031 bytestream2_init(&gb, track->video.projection.private.data,
2032 track->video.projection.private.size);
2034 if (bytestream2_get_byte(&gb) != 0) {
2035 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2039 bytestream2_skip(&gb, 3); // flags
2041 switch (track->video.projection.type) {
2042 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2043 if (track->video.projection.private.size == 20) {
2044 t = bytestream2_get_be32(&gb);
2045 b = bytestream2_get_be32(&gb);
2046 l = bytestream2_get_be32(&gb);
2047 r = bytestream2_get_be32(&gb);
2049 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2050 av_log(NULL, AV_LOG_ERROR,
2051 "Invalid bounding rectangle coordinates "
2052 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2054 return AVERROR_INVALIDDATA;
2056 } else if (track->video.projection.private.size != 0) {
2057 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2058 return AVERROR_INVALIDDATA;
2061 if (l || t || r || b)
2062 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2064 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2066 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2067 if (track->video.projection.private.size < 4) {
2068 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2069 return AVERROR_INVALIDDATA;
2070 } else if (track->video.projection.private.size == 12) {
2071 uint32_t layout = bytestream2_get_be32(&gb);
2073 av_log(NULL, AV_LOG_WARNING,
2074 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2077 projection = AV_SPHERICAL_CUBEMAP;
2078 padding = bytestream2_get_be32(&gb);
2080 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2081 return AVERROR_INVALIDDATA;
2084 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2085 /* No Spherical metadata */
2088 av_log(NULL, AV_LOG_WARNING,
2089 "Unknown spherical metadata type %"PRIu64"\n",
2090 track->video.projection.type);
2094 spherical = av_spherical_alloc(&spherical_size);
2096 return AVERROR(ENOMEM);
2098 spherical->projection = projection;
2100 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2101 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2102 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2104 spherical->padding = padding;
2106 spherical->bound_left = l;
2107 spherical->bound_top = t;
2108 spherical->bound_right = r;
2109 spherical->bound_bottom = b;
2111 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2114 av_freep(&spherical);
2121 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2123 const AVCodecTag *codec_tags;
2125 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2126 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2128 /* Normalize noncompliant private data that starts with the fourcc
2129 * by expanding/shifting the data by 4 bytes and storing the data
2130 * size at the start. */
2131 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2132 int ret = av_buffer_realloc(&track->codec_priv.buf,
2133 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2137 track->codec_priv.data = track->codec_priv.buf->data;
2138 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2139 track->codec_priv.size += 4;
2140 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2143 *fourcc = AV_RL32(track->codec_priv.data + 4);
2144 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2149 static int matroska_parse_tracks(AVFormatContext *s)
2151 MatroskaDemuxContext *matroska = s->priv_data;
2152 MatroskaTrack *tracks = matroska->tracks.elem;
2157 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2158 MatroskaTrack *track = &tracks[i];
2159 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2160 EbmlList *encodings_list = &track->encodings;
2161 MatroskaTrackEncoding *encodings = encodings_list->elem;
2162 uint8_t *extradata = NULL;
2163 int extradata_size = 0;
2164 int extradata_offset = 0;
2165 uint32_t fourcc = 0;
2167 char* key_id_base64 = NULL;
2170 /* Apply some sanity checks. */
2171 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2172 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2173 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2174 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2175 av_log(matroska->ctx, AV_LOG_INFO,
2176 "Unknown or unsupported track type %"PRIu64"\n",
2180 if (!track->codec_id)
2183 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2184 isnan(track->audio.samplerate)) {
2185 av_log(matroska->ctx, AV_LOG_WARNING,
2186 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2187 track->audio.samplerate);
2188 track->audio.samplerate = 8000;
2191 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2192 if (!track->default_duration && track->video.frame_rate > 0) {
2193 double default_duration = 1000000000 / track->video.frame_rate;
2194 if (default_duration > UINT64_MAX || default_duration < 0) {
2195 av_log(matroska->ctx, AV_LOG_WARNING,
2196 "Invalid frame rate %e. Cannot calculate default duration.\n",
2197 track->video.frame_rate);
2199 track->default_duration = default_duration;
2202 if (track->video.display_width == -1)
2203 track->video.display_width = track->video.pixel_width;
2204 if (track->video.display_height == -1)
2205 track->video.display_height = track->video.pixel_height;
2206 if (track->video.color_space.size == 4)
2207 fourcc = AV_RL32(track->video.color_space.data);
2208 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2209 if (!track->audio.out_samplerate)
2210 track->audio.out_samplerate = track->audio.samplerate;
2212 if (encodings_list->nb_elem > 1) {
2213 av_log(matroska->ctx, AV_LOG_ERROR,
2214 "Multiple combined encodings not supported");
2215 } else if (encodings_list->nb_elem == 1) {
2216 if (encodings[0].type) {
2217 if (encodings[0].encryption.key_id.size > 0) {
2218 /* Save the encryption key id to be stored later as a
2220 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2221 key_id_base64 = av_malloc(b64_size);
2222 if (key_id_base64 == NULL)
2223 return AVERROR(ENOMEM);
2225 av_base64_encode(key_id_base64, b64_size,
2226 encodings[0].encryption.key_id.data,
2227 encodings[0].encryption.key_id.size);
2229 encodings[0].scope = 0;
2230 av_log(matroska->ctx, AV_LOG_ERROR,
2231 "Unsupported encoding type");
2235 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2238 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2241 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2243 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2244 encodings[0].scope = 0;
2245 av_log(matroska->ctx, AV_LOG_ERROR,
2246 "Unsupported encoding type");
2247 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2248 uint8_t *codec_priv = track->codec_priv.data;
2249 int ret = matroska_decode_buffer(&track->codec_priv.data,
2250 &track->codec_priv.size,
2253 track->codec_priv.data = NULL;
2254 track->codec_priv.size = 0;
2255 av_log(matroska->ctx, AV_LOG_ERROR,
2256 "Failed to decode codec private data\n");
2259 if (codec_priv != track->codec_priv.data) {
2260 av_buffer_unref(&track->codec_priv.buf);
2261 if (track->codec_priv.data) {
2262 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2263 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2265 if (!track->codec_priv.buf) {
2266 av_freep(&track->codec_priv.data);
2267 track->codec_priv.size = 0;
2268 return AVERROR(ENOMEM);
2275 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2276 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2277 strlen(ff_mkv_codec_tags[j].str))) {
2278 codec_id = ff_mkv_codec_tags[j].id;
2283 st = track->stream = avformat_new_stream(s, NULL);
2285 av_free(key_id_base64);
2286 return AVERROR(ENOMEM);
2289 if (key_id_base64) {
2290 /* export encryption key id as base64 metadata tag */
2291 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2292 av_freep(&key_id_base64);
2295 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2296 track->codec_priv.size >= 40 &&
2297 track->codec_priv.data) {
2298 track->ms_compat = 1;
2299 bit_depth = AV_RL16(track->codec_priv.data + 14);
2300 fourcc = AV_RL32(track->codec_priv.data + 16);
2301 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2304 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2306 extradata_offset = 40;
2307 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2308 track->codec_priv.size >= 14 &&
2309 track->codec_priv.data) {
2311 ffio_init_context(&b, track->codec_priv.data,
2312 track->codec_priv.size,
2313 0, NULL, NULL, NULL, NULL);
2314 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2317 codec_id = st->codecpar->codec_id;
2318 fourcc = st->codecpar->codec_tag;
2319 extradata_offset = FFMIN(track->codec_priv.size, 18);
2320 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2321 /* Normally 36, but allow noncompliant private data */
2322 && (track->codec_priv.size >= 32)
2323 && (track->codec_priv.data)) {
2324 uint16_t sample_size;
2325 int ret = get_qt_codec(track, &fourcc, &codec_id);
2328 sample_size = AV_RB16(track->codec_priv.data + 26);
2330 if (sample_size == 8) {
2331 fourcc = MKTAG('r','a','w',' ');
2332 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2333 } else if (sample_size == 16) {
2334 fourcc = MKTAG('t','w','o','s');
2335 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2338 if ((fourcc == MKTAG('t','w','o','s') ||
2339 fourcc == MKTAG('s','o','w','t')) &&
2341 codec_id = AV_CODEC_ID_PCM_S8;
2342 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2343 (track->codec_priv.size >= 21) &&
2344 (track->codec_priv.data)) {
2345 int ret = get_qt_codec(track, &fourcc, &codec_id);
2348 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2349 fourcc = MKTAG('S','V','Q','3');
2350 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2352 if (codec_id == AV_CODEC_ID_NONE)
2353 av_log(matroska->ctx, AV_LOG_ERROR,
2354 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2355 if (track->codec_priv.size >= 86) {
2356 bit_depth = AV_RB16(track->codec_priv.data + 82);
2357 ffio_init_context(&b, track->codec_priv.data,
2358 track->codec_priv.size,
2359 0, NULL, NULL, NULL, NULL);
2360 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2362 track->has_palette = 1;
2365 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2366 switch (track->audio.bitdepth) {
2368 codec_id = AV_CODEC_ID_PCM_U8;
2371 codec_id = AV_CODEC_ID_PCM_S24BE;
2374 codec_id = AV_CODEC_ID_PCM_S32BE;
2377 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2378 switch (track->audio.bitdepth) {
2380 codec_id = AV_CODEC_ID_PCM_U8;
2383 codec_id = AV_CODEC_ID_PCM_S24LE;
2386 codec_id = AV_CODEC_ID_PCM_S32LE;
2389 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2390 track->audio.bitdepth == 64) {
2391 codec_id = AV_CODEC_ID_PCM_F64LE;
2392 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2393 int profile = matroska_aac_profile(track->codec_id);
2394 int sri = matroska_aac_sri(track->audio.samplerate);
2395 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2397 return AVERROR(ENOMEM);
2398 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2399 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2400 if (strstr(track->codec_id, "SBR")) {
2401 sri = matroska_aac_sri(track->audio.out_samplerate);
2402 extradata[2] = 0x56;
2403 extradata[3] = 0xE5;
2404 extradata[4] = 0x80 | (sri << 3);
2408 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2409 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2410 * Create the "atom size", "tag", and "tag version" fields the
2411 * decoder expects manually. */
2412 extradata_size = 12 + track->codec_priv.size;
2413 extradata = av_mallocz(extradata_size +
2414 AV_INPUT_BUFFER_PADDING_SIZE);
2416 return AVERROR(ENOMEM);
2417 AV_WB32(extradata, extradata_size);
2418 memcpy(&extradata[4], "alac", 4);
2419 AV_WB32(&extradata[8], 0);
2420 memcpy(&extradata[12], track->codec_priv.data,
2421 track->codec_priv.size);
2422 } else if (codec_id == AV_CODEC_ID_TTA) {
2423 extradata_size = 30;
2424 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2426 return AVERROR(ENOMEM);
2427 ffio_init_context(&b, extradata, extradata_size, 1,
2428 NULL, NULL, NULL, NULL);
2429 avio_write(&b, "TTA1", 4);
2431 if (track->audio.channels > UINT16_MAX ||
2432 track->audio.bitdepth > UINT16_MAX) {
2433 av_log(matroska->ctx, AV_LOG_WARNING,
2434 "Too large audio channel number %"PRIu64
2435 " or bitdepth %"PRIu64". Skipping track.\n",
2436 track->audio.channels, track->audio.bitdepth);
2437 av_freep(&extradata);
2438 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2439 return AVERROR_INVALIDDATA;
2443 avio_wl16(&b, track->audio.channels);
2444 avio_wl16(&b, track->audio.bitdepth);
2445 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2446 return AVERROR_INVALIDDATA;
2447 avio_wl32(&b, track->audio.out_samplerate);
2448 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2449 track->audio.out_samplerate,
2450 AV_TIME_BASE * 1000));
2451 } else if (codec_id == AV_CODEC_ID_RV10 ||
2452 codec_id == AV_CODEC_ID_RV20 ||
2453 codec_id == AV_CODEC_ID_RV30 ||
2454 codec_id == AV_CODEC_ID_RV40) {
2455 extradata_offset = 26;
2456 } else if (codec_id == AV_CODEC_ID_RA_144) {
2457 track->audio.out_samplerate = 8000;
2458 track->audio.channels = 1;
2459 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2460 codec_id == AV_CODEC_ID_COOK ||
2461 codec_id == AV_CODEC_ID_ATRAC3 ||
2462 codec_id == AV_CODEC_ID_SIPR)
2463 && track->codec_priv.data) {
2466 ffio_init_context(&b, track->codec_priv.data,
2467 track->codec_priv.size,
2468 0, NULL, NULL, NULL, NULL);
2470 flavor = avio_rb16(&b);
2471 track->audio.coded_framesize = avio_rb32(&b);
2473 track->audio.sub_packet_h = avio_rb16(&b);
2474 track->audio.frame_size = avio_rb16(&b);
2475 track->audio.sub_packet_size = avio_rb16(&b);
2477 track->audio.coded_framesize <= 0 ||
2478 track->audio.sub_packet_h <= 0 ||
2479 track->audio.frame_size <= 0 ||
2480 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2481 return AVERROR_INVALIDDATA;
2482 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2483 track->audio.frame_size);
2484 if (!track->audio.buf)
2485 return AVERROR(ENOMEM);
2486 if (codec_id == AV_CODEC_ID_RA_288) {
2487 st->codecpar->block_align = track->audio.coded_framesize;
2488 track->codec_priv.size = 0;
2490 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2491 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2492 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2493 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2495 st->codecpar->block_align = track->audio.sub_packet_size;
2496 extradata_offset = 78;
2498 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2499 ret = matroska_parse_flac(s, track, &extradata_offset);
2502 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2503 fourcc = AV_RL32(track->codec_priv.data);
2504 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2505 /* we don't need any value stored in CodecPrivate.
2506 make sure that it's not exported as extradata. */
2507 track->codec_priv.size = 0;
2508 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2509 /* For now, propagate only the OBUs, if any. Once libavcodec is
2510 updated to handle isobmff style extradata this can be removed. */
2511 extradata_offset = 4;
2513 track->codec_priv.size -= extradata_offset;
2515 if (codec_id == AV_CODEC_ID_NONE)
2516 av_log(matroska->ctx, AV_LOG_INFO,
2517 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2519 if (track->time_scale < 0.01)
2520 track->time_scale = 1.0;
2521 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2522 1000 * 1000 * 1000); /* 64 bit pts in ns */
2524 /* convert the delay from ns to the track timebase */
2525 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2526 (AVRational){ 1, 1000000000 },
2529 st->codecpar->codec_id = codec_id;
2531 if (strcmp(track->language, "und"))
2532 av_dict_set(&st->metadata, "language", track->language, 0);
2533 av_dict_set(&st->metadata, "title", track->name, 0);
2535 if (track->flag_default)
2536 st->disposition |= AV_DISPOSITION_DEFAULT;
2537 if (track->flag_forced)
2538 st->disposition |= AV_DISPOSITION_FORCED;
2540 if (!st->codecpar->extradata) {
2542 st->codecpar->extradata = extradata;
2543 st->codecpar->extradata_size = extradata_size;
2544 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2545 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2546 return AVERROR(ENOMEM);
2547 memcpy(st->codecpar->extradata,
2548 track->codec_priv.data + extradata_offset,
2549 track->codec_priv.size);
2553 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2554 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2555 int display_width_mul = 1;
2556 int display_height_mul = 1;
2558 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2559 st->codecpar->codec_tag = fourcc;
2561 st->codecpar->bits_per_coded_sample = bit_depth;
2562 st->codecpar->width = track->video.pixel_width;
2563 st->codecpar->height = track->video.pixel_height;
2565 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2566 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2567 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2568 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2570 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2571 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2573 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2574 av_reduce(&st->sample_aspect_ratio.num,
2575 &st->sample_aspect_ratio.den,
2576 st->codecpar->height * track->video.display_width * display_width_mul,
2577 st->codecpar->width * track->video.display_height * display_height_mul,
2580 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2581 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2583 if (track->default_duration) {
2584 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2585 1000000000, track->default_duration, 30000);
2586 #if FF_API_R_FRAME_RATE
2587 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2588 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2589 st->r_frame_rate = st->avg_frame_rate;
2593 /* export stereo mode flag as metadata tag */
2594 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2595 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2597 /* export alpha mode flag as metadata tag */
2598 if (track->video.alpha_mode)
2599 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2601 /* if we have virtual track, mark the real tracks */
2602 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2604 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2606 snprintf(buf, sizeof(buf), "%s_%d",
2607 ff_matroska_video_stereo_plane[planes[j].type], i);
2608 for (k=0; k < matroska->tracks.nb_elem; k++)
2609 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2610 av_dict_set(&tracks[k].stream->metadata,
2611 "stereo_mode", buf, 0);
2615 // add stream level stereo3d side data if it is a supported format
2616 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2617 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2618 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2623 ret = mkv_parse_video_color(st, track);
2626 ret = mkv_parse_video_projection(st, track);
2629 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2630 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2631 st->codecpar->codec_tag = fourcc;
2632 st->codecpar->sample_rate = track->audio.out_samplerate;
2633 st->codecpar->channels = track->audio.channels;
2634 if (!st->codecpar->bits_per_coded_sample)
2635 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2636 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2637 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2638 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2639 st->need_parsing = AVSTREAM_PARSE_FULL;
2640 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2641 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2642 if (track->codec_delay > 0) {
2643 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2644 (AVRational){1, 1000000000},
2645 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2646 48000 : st->codecpar->sample_rate});
2648 if (track->seek_preroll > 0) {
2649 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2650 (AVRational){1, 1000000000},
2651 (AVRational){1, st->codecpar->sample_rate});
2653 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2654 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2656 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2657 st->disposition |= AV_DISPOSITION_CAPTIONS;
2658 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2659 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2660 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2661 st->disposition |= AV_DISPOSITION_METADATA;
2663 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2664 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2671 static int matroska_read_header(AVFormatContext *s)
2673 MatroskaDemuxContext *matroska = s->priv_data;
2674 EbmlList *attachments_list = &matroska->attachments;
2675 EbmlList *chapters_list = &matroska->chapters;
2676 MatroskaAttachment *attachments;
2677 MatroskaChapter *chapters;
2678 uint64_t max_start = 0;
2684 matroska->cues_parsing_deferred = 1;
2686 /* First read the EBML header. */
2687 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2688 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2689 ebml_free(ebml_syntax, &ebml);
2690 return AVERROR_INVALIDDATA;
2692 if (ebml.version > EBML_VERSION ||
2693 ebml.max_size > sizeof(uint64_t) ||
2694 ebml.id_length > sizeof(uint32_t) ||
2695 ebml.doctype_version > 3) {
2696 avpriv_report_missing_feature(matroska->ctx,
2697 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2698 ebml.version, ebml.doctype, ebml.doctype_version);
2699 ebml_free(ebml_syntax, &ebml);
2700 return AVERROR_PATCHWELCOME;
2701 } else if (ebml.doctype_version == 3) {
2702 av_log(matroska->ctx, AV_LOG_WARNING,
2703 "EBML header using unsupported features\n"
2704 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2705 ebml.version, ebml.doctype, ebml.doctype_version);
2707 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2708 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2710 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2711 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2712 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2713 ebml_free(ebml_syntax, &ebml);
2714 return AVERROR_INVALIDDATA;
2717 ebml_free(ebml_syntax, &ebml);
2719 /* The next thing is a segment. */
2720 pos = avio_tell(matroska->ctx->pb);
2721 res = ebml_parse(matroska, matroska_segments, matroska);
2722 // try resyncing until we find a EBML_STOP type element.
2724 res = matroska_resync(matroska, pos);
2727 pos = avio_tell(matroska->ctx->pb);
2728 res = ebml_parse(matroska, matroska_segment, matroska);
2730 /* Set data_offset as it might be needed later by seek_frame_generic. */
2731 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2732 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2733 matroska_execute_seekhead(matroska);
2735 if (!matroska->time_scale)
2736 matroska->time_scale = 1000000;
2737 if (matroska->duration)
2738 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2739 1000 / AV_TIME_BASE;
2740 av_dict_set(&s->metadata, "title", matroska->title, 0);
2741 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2743 if (matroska->date_utc.size == 8)
2744 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2746 res = matroska_parse_tracks(s);
2750 attachments = attachments_list->elem;
2751 for (j = 0; j < attachments_list->nb_elem; j++) {
2752 if (!(attachments[j].filename && attachments[j].mime &&
2753 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2754 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2756 AVStream *st = avformat_new_stream(s, NULL);
2759 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2760 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2761 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2763 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2764 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2765 strlen(ff_mkv_image_mime_tags[i].str))) {
2766 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2771 attachments[j].stream = st;
2773 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2774 AVPacket *pkt = &st->attached_pic;
2776 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2777 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2779 av_init_packet(pkt);
2780 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2782 return AVERROR(ENOMEM);
2783 pkt->data = attachments[j].bin.data;
2784 pkt->size = attachments[j].bin.size;
2785 pkt->stream_index = st->index;
2786 pkt->flags |= AV_PKT_FLAG_KEY;
2788 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2789 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2791 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2792 attachments[j].bin.size);
2794 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2795 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2796 strlen(ff_mkv_mime_tags[i].str))) {
2797 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2805 chapters = chapters_list->elem;
2806 for (i = 0; i < chapters_list->nb_elem; i++)
2807 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2808 (max_start == 0 || chapters[i].start > max_start)) {
2809 chapters[i].chapter =
2810 avpriv_new_chapter(s, chapters[i].uid,
2811 (AVRational) { 1, 1000000000 },
2812 chapters[i].start, chapters[i].end,
2814 if (chapters[i].chapter) {
2815 av_dict_set(&chapters[i].chapter->metadata,
2816 "title", chapters[i].title, 0);
2818 max_start = chapters[i].start;
2821 matroska_add_index_entries(matroska);
2823 matroska_convert_tags(s);
2827 matroska_read_close(s);
2832 * Put one packet in an application-supplied AVPacket struct.
2833 * Returns 0 on success or -1 on failure.
2835 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2838 if (matroska->queue) {
2839 MatroskaTrack *tracks = matroska->tracks.elem;
2840 MatroskaTrack *track;
2842 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2843 track = &tracks[pkt->stream_index];
2844 if (track->has_palette) {
2845 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2847 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2849 memcpy(pal, track->palette, AVPALETTE_SIZE);
2851 track->has_palette = 0;
2860 * Free all packets in our internal queue.
2862 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2864 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2867 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2868 int *buf_size, int type,
2869 uint32_t **lace_buf, int *laces)
2871 int res = 0, n, size = *buf_size;
2872 uint8_t *data = *buf;
2873 uint32_t *lace_size;
2877 *lace_buf = av_malloc(sizeof(**lace_buf));
2879 return AVERROR(ENOMEM);
2881 *lace_buf[0] = size;
2885 av_assert0(size > 0);
2889 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2891 return AVERROR(ENOMEM);
2894 case 0x1: /* Xiph lacing */
2898 for (n = 0; res == 0 && n < *laces - 1; n++) {
2902 if (size <= total) {
2903 res = AVERROR_INVALIDDATA;
2908 lace_size[n] += temp;
2915 if (size <= total) {
2916 res = AVERROR_INVALIDDATA;
2920 lace_size[n] = size - total;
2924 case 0x2: /* fixed-size lacing */
2925 if (size % (*laces)) {
2926 res = AVERROR_INVALIDDATA;
2929 for (n = 0; n < *laces; n++)
2930 lace_size[n] = size / *laces;
2933 case 0x3: /* EBML lacing */
2937 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2938 if (n < 0 || num > INT_MAX) {
2939 av_log(matroska->ctx, AV_LOG_INFO,
2940 "EBML block data error\n");
2941 res = n<0 ? n : AVERROR_INVALIDDATA;
2946 total = lace_size[0] = num;
2947 for (n = 1; res == 0 && n < *laces - 1; n++) {
2950 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2951 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2952 av_log(matroska->ctx, AV_LOG_INFO,
2953 "EBML block data error\n");
2954 res = r<0 ? r : AVERROR_INVALIDDATA;
2959 lace_size[n] = lace_size[n - 1] + snum;
2960 total += lace_size[n];
2962 if (size <= total) {
2963 res = AVERROR_INVALIDDATA;
2966 lace_size[*laces - 1] = size - total;
2972 *lace_buf = lace_size;
2978 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2979 MatroskaTrack *track, AVStream *st,
2980 uint8_t *data, int size, uint64_t timecode,
2983 int a = st->codecpar->block_align;
2984 int sps = track->audio.sub_packet_size;
2985 int cfs = track->audio.coded_framesize;
2986 int h = track->audio.sub_packet_h;
2987 int y = track->audio.sub_packet_cnt;
2988 int w = track->audio.frame_size;
2991 if (!track->audio.pkt_cnt) {
2992 if (track->audio.sub_packet_cnt == 0)
2993 track->audio.buf_timecode = timecode;
2994 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2995 if (size < cfs * h / 2) {
2996 av_log(matroska->ctx, AV_LOG_ERROR,
2997 "Corrupt int4 RM-style audio packet size\n");
2998 return AVERROR_INVALIDDATA;
3000 for (x = 0; x < h / 2; x++)
3001 memcpy(track->audio.buf + x * 2 * w + y * cfs,
3002 data + x * cfs, cfs);
3003 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3005 av_log(matroska->ctx, AV_LOG_ERROR,
3006 "Corrupt sipr RM-style audio packet size\n");
3007 return AVERROR_INVALIDDATA;
3009 memcpy(track->audio.buf + y * w, data, w);
3011 if (size < sps * w / sps || h<=0 || w%sps) {
3012 av_log(matroska->ctx, AV_LOG_ERROR,
3013 "Corrupt generic RM-style audio packet size\n");
3014 return AVERROR_INVALIDDATA;
3016 for (x = 0; x < w / sps; x++)
3017 memcpy(track->audio.buf +
3018 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3019 data + x * sps, sps);
3022 if (++track->audio.sub_packet_cnt >= h) {
3023 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3024 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3025 track->audio.sub_packet_cnt = 0;
3026 track->audio.pkt_cnt = h * w / a;
3030 while (track->audio.pkt_cnt) {
3032 AVPacket pktl, *pkt = &pktl;
3034 ret = av_new_packet(pkt, a);
3039 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3041 pkt->pts = track->audio.buf_timecode;
3042 track->audio.buf_timecode = AV_NOPTS_VALUE;
3044 pkt->stream_index = st->index;
3045 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3047 av_packet_unref(pkt);
3048 return AVERROR(ENOMEM);
3055 /* reconstruct full wavpack blocks from mangled matroska ones */
3056 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3057 uint8_t **pdst, int *size)
3059 uint8_t *dst = NULL;
3064 int ret, offset = 0;
3066 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3067 return AVERROR_INVALIDDATA;
3069 ver = AV_RL16(track->stream->codecpar->extradata);
3071 samples = AV_RL32(src);
3075 while (srclen >= 8) {
3080 uint32_t flags = AV_RL32(src);
3081 uint32_t crc = AV_RL32(src + 4);
3085 multiblock = (flags & 0x1800) != 0x1800;
3088 ret = AVERROR_INVALIDDATA;
3091 blocksize = AV_RL32(src);
3097 if (blocksize > srclen) {
3098 ret = AVERROR_INVALIDDATA;
3102 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3104 ret = AVERROR(ENOMEM);
3108 dstlen += blocksize + 32;
3110 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3111 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3112 AV_WL16(dst + offset + 8, ver); // version
3113 AV_WL16(dst + offset + 10, 0); // track/index_no
3114 AV_WL32(dst + offset + 12, 0); // total samples
3115 AV_WL32(dst + offset + 16, 0); // block index
3116 AV_WL32(dst + offset + 20, samples); // number of samples
3117 AV_WL32(dst + offset + 24, flags); // flags
3118 AV_WL32(dst + offset + 28, crc); // crc
3119 memcpy(dst + offset + 32, src, blocksize); // block data
3122 srclen -= blocksize;
3123 offset += blocksize + 32;
3126 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3138 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3139 uint8_t **pdst, int *size)
3144 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3145 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3147 return AVERROR(ENOMEM);
3149 AV_WB32(dst, dstlen);
3150 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3151 memcpy(dst + 8, src, dstlen);
3152 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3162 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3163 MatroskaTrack *track,
3165 uint8_t *data, int data_len,
3170 AVPacket pktl, *pkt = &pktl;
3171 uint8_t *id, *settings, *text, *buf;
3172 int id_len, settings_len, text_len;
3177 return AVERROR_INVALIDDATA;
3180 q = data + data_len;
3185 if (*p == '\r' || *p == '\n') {
3194 if (p >= q || *p != '\n')
3195 return AVERROR_INVALIDDATA;
3201 if (*p == '\r' || *p == '\n') {
3202 settings_len = p - settings;
3210 if (p >= q || *p != '\n')
3211 return AVERROR_INVALIDDATA;
3216 while (text_len > 0) {
3217 const int len = text_len - 1;
3218 const uint8_t c = p[len];
3219 if (c != '\r' && c != '\n')
3225 return AVERROR_INVALIDDATA;
3227 err = av_new_packet(pkt, text_len);
3232 memcpy(pkt->data, text, text_len);
3235 buf = av_packet_new_side_data(pkt,
3236 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3239 av_packet_unref(pkt);
3240 return AVERROR(ENOMEM);
3242 memcpy(buf, id, id_len);
3245 if (settings_len > 0) {
3246 buf = av_packet_new_side_data(pkt,
3247 AV_PKT_DATA_WEBVTT_SETTINGS,
3250 av_packet_unref(pkt);
3251 return AVERROR(ENOMEM);
3253 memcpy(buf, settings, settings_len);
3256 // Do we need this for subtitles?
3257 // pkt->flags = AV_PKT_FLAG_KEY;
3259 pkt->stream_index = st->index;
3260 pkt->pts = timecode;
3262 // Do we need this for subtitles?
3263 // pkt->dts = timecode;
3265 pkt->duration = duration;
3268 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3270 av_packet_unref(pkt);
3271 return AVERROR(ENOMEM);
3277 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3278 MatroskaTrack *track, AVStream *st,
3279 AVBufferRef *buf, uint8_t *data, int pkt_size,
3280 uint64_t timecode, uint64_t lace_duration,
3281 int64_t pos, int is_keyframe,
3282 uint8_t *additional, uint64_t additional_id, int additional_size,
3283 int64_t discard_padding)
3285 MatroskaTrackEncoding *encodings = track->encodings.elem;
3286 uint8_t *pkt_data = data;
3288 AVPacket pktl, *pkt = &pktl;
3290 if (encodings && !encodings->type && encodings->scope & 1) {
3291 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3296 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3298 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3300 av_log(matroska->ctx, AV_LOG_ERROR,
3301 "Error parsing a wavpack block.\n");
3304 if (pkt_data != data)
3305 av_freep(&pkt_data);
3309 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3311 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3313 av_log(matroska->ctx, AV_LOG_ERROR,
3314 "Error parsing a prores block.\n");
3317 if (pkt_data != data)
3318 av_freep(&pkt_data);
3322 av_init_packet(pkt);
3323 if (pkt_data != data)
3324 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3327 pkt->buf = av_buffer_ref(buf);
3330 res = AVERROR(ENOMEM);
3334 pkt->data = pkt_data;
3335 pkt->size = pkt_size;
3336 pkt->flags = is_keyframe;
3337 pkt->stream_index = st->index;
3339 if (additional_size > 0) {
3340 uint8_t *side_data = av_packet_new_side_data(pkt,
3341 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3342 additional_size + 8);
3344 av_packet_unref(pkt);
3345 return AVERROR(ENOMEM);
3347 AV_WB64(side_data, additional_id);
3348 memcpy(side_data + 8, additional, additional_size);
3351 if (discard_padding) {
3352 uint8_t *side_data = av_packet_new_side_data(pkt,
3353 AV_PKT_DATA_SKIP_SAMPLES,
3356 av_packet_unref(pkt);
3357 return AVERROR(ENOMEM);
3359 discard_padding = av_rescale_q(discard_padding,
3360 (AVRational){1, 1000000000},
3361 (AVRational){1, st->codecpar->sample_rate});
3362 if (discard_padding > 0) {
3363 AV_WL32(side_data + 4, discard_padding);
3365 AV_WL32(side_data, -discard_padding);
3369 if (track->ms_compat)
3370 pkt->dts = timecode;
3372 pkt->pts = timecode;
3374 pkt->duration = lace_duration;
3376 #if FF_API_CONVERGENCE_DURATION
3377 FF_DISABLE_DEPRECATION_WARNINGS
3378 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3379 pkt->convergence_duration = lace_duration;
3381 FF_ENABLE_DEPRECATION_WARNINGS
3384 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3386 av_packet_unref(pkt);
3387 return AVERROR(ENOMEM);
3393 if (pkt_data != data)
3394 av_freep(&pkt_data);
3398 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3399 int size, int64_t pos, uint64_t cluster_time,
3400 uint64_t block_duration, int is_keyframe,
3401 uint8_t *additional, uint64_t additional_id, int additional_size,
3402 int64_t cluster_pos, int64_t discard_padding)
3404 uint64_t timecode = AV_NOPTS_VALUE;
3405 MatroskaTrack *track;
3409 uint32_t *lace_size = NULL;
3410 int n, flags, laces = 0;
3412 int trust_default_duration = 1;
3414 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3420 track = matroska_find_track_by_num(matroska, num);
3421 if (!track || !track->stream) {
3422 av_log(matroska->ctx, AV_LOG_INFO,
3423 "Invalid stream %"PRIu64"\n", num);
3424 return AVERROR_INVALIDDATA;
3425 } else if (size <= 3)
3428 if (st->discard >= AVDISCARD_ALL)
3430 av_assert1(block_duration != AV_NOPTS_VALUE);
3432 block_time = sign_extend(AV_RB16(data), 16);
3436 if (is_keyframe == -1)
3437 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3439 if (cluster_time != (uint64_t) -1 &&
3440 (block_time >= 0 || cluster_time >= -block_time)) {
3441 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3442 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3443 timecode < track->end_timecode)
3444 is_keyframe = 0; /* overlapping subtitles are not key frame */
3446 ff_reduce_index(matroska->ctx, st->index);
3447 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3452 if (matroska->skip_to_keyframe &&
3453 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3454 // Compare signed timecodes. Timecode may be negative due to codec delay
3455 // offset. We don't support timestamps greater than int64_t anyway - see
3457 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3460 matroska->skip_to_keyframe = 0;
3461 else if (!st->skip_to_keyframe) {
3462 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3463 matroska->skip_to_keyframe = 0;
3467 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3468 &lace_size, &laces);
3473 if (track->audio.samplerate == 8000) {
3474 // If this is needed for more codecs, then add them here
3475 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3476 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3477 trust_default_duration = 0;
3481 if (!block_duration && trust_default_duration)
3482 block_duration = track->default_duration * laces / matroska->time_scale;
3484 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3485 track->end_timecode =
3486 FFMAX(track->end_timecode, timecode + block_duration);
3488 for (n = 0; n < laces; n++) {
3489 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3491 if (lace_size[n] > size) {
3492 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3496 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3497 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3498 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3499 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3500 st->codecpar->block_align && track->audio.sub_packet_size) {
3501 res = matroska_parse_rm_audio(matroska, track, st, data,
3507 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3508 res = matroska_parse_webvtt(matroska, track, st,
3510 timecode, lace_duration,
3515 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3516 timecode, lace_duration, pos,
3517 !n ? is_keyframe : 0,
3518 additional, additional_id, additional_size,
3524 if (timecode != AV_NOPTS_VALUE)
3525 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3526 data += lace_size[n];
3527 size -= lace_size[n];
3535 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3537 MatroskaCluster *cluster = &matroska->current_cluster;
3538 MatroskaBlock *block = &cluster->block;
3540 res = ebml_parse(matroska,
3541 matroska_cluster_parsing,
3546 ebml_level_end(matroska);
3547 cluster->pos = avio_tell(matroska->ctx->pb);
3548 /* sizeof the ID which was already read */
3549 if (matroska->current_id)
3551 res = ebml_parse(matroska,
3554 /* Try parsing the block again. */
3556 res = ebml_parse(matroska,
3557 matroska_cluster_parsing,
3561 if (!res && block->bin.size > 0) {
3562 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3563 uint8_t* additional = block->additional.size > 0 ?
3564 block->additional.data : NULL;
3566 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3567 block->bin.size, block->bin.pos,
3568 matroska->current_cluster.timecode,
3569 block->duration, is_keyframe,
3570 additional, block->additional_id,
3571 block->additional.size,
3573 block->discard_padding);
3576 ebml_free(matroska_blockgroup, block);
3577 memset(block, 0, sizeof(*block));
3582 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3584 MatroskaDemuxContext *matroska = s->priv_data;
3587 if (matroska->resync_pos == -1) {
3588 // This can only happen if generic seeking has been used.
3589 matroska->resync_pos = avio_tell(s->pb);
3592 while (matroska_deliver_packet(matroska, pkt)) {
3594 return (ret < 0) ? ret : AVERROR_EOF;
3595 if (matroska_parse_cluster(matroska) < 0)
3596 ret = matroska_resync(matroska, matroska->resync_pos);
3602 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3603 int64_t timestamp, int flags)
3605 MatroskaDemuxContext *matroska = s->priv_data;
3606 MatroskaTrack *tracks = NULL;
3607 AVStream *st = s->streams[stream_index];
3610 /* Parse the CUES now since we need the index data to seek. */
3611 if (matroska->cues_parsing_deferred > 0) {
3612 matroska->cues_parsing_deferred = 0;
3613 matroska_parse_cues(matroska);
3616 if (!st->nb_index_entries)
3618 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3620 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3621 matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3622 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3623 matroska_clear_queue(matroska);
3624 if (matroska_parse_cluster(matroska) < 0)
3629 matroska_clear_queue(matroska);
3630 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3633 tracks = matroska->tracks.elem;
3634 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3635 tracks[i].audio.pkt_cnt = 0;
3636 tracks[i].audio.sub_packet_cnt = 0;
3637 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3638 tracks[i].end_timecode = 0;
3641 /* We seek to a level 1 element, so set the appropriate status. */
3642 matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3643 if (flags & AVSEEK_FLAG_ANY) {
3644 st->skip_to_keyframe = 0;
3645 matroska->skip_to_timecode = timestamp;
3647 st->skip_to_keyframe = 1;
3648 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3650 matroska->skip_to_keyframe = 1;
3652 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3655 // slightly hackish but allows proper fallback to
3656 // the generic seeking code.
3657 matroska_reset_status(matroska, 0, -1);
3658 matroska->resync_pos = -1;
3659 matroska_clear_queue(matroska);
3660 st->skip_to_keyframe =
3661 matroska->skip_to_keyframe = 0;
3666 static int matroska_read_close(AVFormatContext *s)
3668 MatroskaDemuxContext *matroska = s->priv_data;
3669 MatroskaTrack *tracks = matroska->tracks.elem;
3672 matroska_clear_queue(matroska);
3674 for (n = 0; n < matroska->tracks.nb_elem; n++)
3675 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3676 av_freep(&tracks[n].audio.buf);
3677 ebml_free(matroska_segment, matroska);
3683 int64_t start_time_ns;
3684 int64_t end_time_ns;
3685 int64_t start_offset;
3689 /* This function searches all the Cues and returns the CueDesc corresponding to
3690 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3691 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3693 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3694 MatroskaDemuxContext *matroska = s->priv_data;
3697 int nb_index_entries = s->streams[0]->nb_index_entries;
3698 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3699 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3700 for (i = 1; i < nb_index_entries; i++) {
3701 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3702 index_entries[i].timestamp * matroska->time_scale > ts) {
3707 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3708 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3709 if (i != nb_index_entries - 1) {
3710 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3711 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3713 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3714 // FIXME: this needs special handling for files where Cues appear
3715 // before Clusters. the current logic assumes Cues appear after
3717 cue_desc.end_offset = cues_start - matroska->segment_start;
3722 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3724 MatroskaDemuxContext *matroska = s->priv_data;
3725 uint32_t id = matroska->current_id;
3726 int64_t cluster_pos, before_pos;
3728 if (s->streams[0]->nb_index_entries <= 0) return 0;
3729 // seek to the first cluster using cues.
3730 index = av_index_search_timestamp(s->streams[0], 0, 0);
3731 if (index < 0) return 0;
3732 cluster_pos = s->streams[0]->index_entries[index].pos;
3733 before_pos = avio_tell(s->pb);
3735 uint64_t cluster_id, cluster_length;
3738 avio_seek(s->pb, cluster_pos, SEEK_SET);
3739 // read cluster id and length
3740 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3741 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3743 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3747 matroska_reset_status(matroska, 0, cluster_pos);
3748 matroska_clear_queue(matroska);
3749 if (matroska_parse_cluster(matroska) < 0 ||
3753 pkt = &matroska->queue->pkt;
3754 // 4 + read is the length of the cluster id and the cluster length field.
3755 cluster_pos += 4 + read + cluster_length;
3756 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3762 /* Restore the status after matroska_read_header: */
3763 matroska_reset_status(matroska, id, before_pos);
3768 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3769 double min_buffer, double* buffer,
3770 double* sec_to_download, AVFormatContext *s,
3773 double nano_seconds_per_second = 1000000000.0;
3774 double time_sec = time_ns / nano_seconds_per_second;
3776 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3777 int64_t end_time_ns = time_ns + time_to_search_ns;
3778 double sec_downloaded = 0.0;
3779 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3780 if (desc_curr.start_time_ns == -1)
3782 *sec_to_download = 0.0;
3784 // Check for non cue start time.
3785 if (time_ns > desc_curr.start_time_ns) {
3786 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3787 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3788 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3789 double timeToDownload = (cueBytes * 8.0) / bps;
3791 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3792 *sec_to_download += timeToDownload;
3794 // Check if the search ends within the first cue.
3795 if (desc_curr.end_time_ns >= end_time_ns) {
3796 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3797 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3798 sec_downloaded = percent_to_sub * sec_downloaded;
3799 *sec_to_download = percent_to_sub * *sec_to_download;
3802 if ((sec_downloaded + *buffer) <= min_buffer) {
3806 // Get the next Cue.
3807 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3810 while (desc_curr.start_time_ns != -1) {
3811 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3812 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3813 double desc_sec = desc_ns / nano_seconds_per_second;
3814 double bits = (desc_bytes * 8.0);
3815 double time_to_download = bits / bps;
3817 sec_downloaded += desc_sec - time_to_download;
3818 *sec_to_download += time_to_download;
3820 if (desc_curr.end_time_ns >= end_time_ns) {
3821 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3822 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3823 sec_downloaded = percent_to_sub * sec_downloaded;
3824 *sec_to_download = percent_to_sub * *sec_to_download;
3826 if ((sec_downloaded + *buffer) <= min_buffer)
3831 if ((sec_downloaded + *buffer) <= min_buffer) {
3836 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3838 *buffer = *buffer + sec_downloaded;
3842 /* This function computes the bandwidth of the WebM file with the help of
3843 * buffer_size_after_time_downloaded() function. Both of these functions are
3844 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3845 * Matroska parsing mechanism.
3847 * Returns the bandwidth of the file on success; -1 on error.
3849 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3851 MatroskaDemuxContext *matroska = s->priv_data;
3852 AVStream *st = s->streams[0];
3853 double bandwidth = 0.0;
3856 for (i = 0; i < st->nb_index_entries; i++) {
3857 int64_t prebuffer_ns = 1000000000;
3858 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3859 double nano_seconds_per_second = 1000000000.0;
3860 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3861 double prebuffer_bytes = 0.0;
3862 int64_t temp_prebuffer_ns = prebuffer_ns;
3863 int64_t pre_bytes, pre_ns;
3864 double pre_sec, prebuffer, bits_per_second;
3865 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3867 // Start with the first Cue.
3868 CueDesc desc_end = desc_beg;
3870 // Figure out how much data we have downloaded for the prebuffer. This will
3871 // be used later to adjust the bits per sample to try.
3872 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3873 // Prebuffered the entire Cue.
3874 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3875 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3876 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3878 if (desc_end.start_time_ns == -1) {
3879 // The prebuffer is larger than the duration.
3880 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3882 bits_per_second = 0.0;
3884 // The prebuffer ends in the last Cue. Estimate how much data was
3886 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3887 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3888 pre_sec = pre_ns / nano_seconds_per_second;
3890 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3892 prebuffer = prebuffer_ns / nano_seconds_per_second;
3894 // Set this to 0.0 in case our prebuffer buffers the entire video.
3895 bits_per_second = 0.0;
3897 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3898 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3899 double desc_sec = desc_ns / nano_seconds_per_second;
3900 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3902 // Drop the bps by the percentage of bytes buffered.
3903 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3904 double mod_bits_per_second = calc_bits_per_second * percent;
3906 if (prebuffer < desc_sec) {
3908 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3910 // Add 1 so the bits per second should be a little bit greater than file
3912 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3913 const double min_buffer = 0.0;
3914 double buffer = prebuffer;
3915 double sec_to_download = 0.0;
3917 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3918 min_buffer, &buffer, &sec_to_download,
3922 } else if (rv == 0) {
3923 bits_per_second = (double)(bps);
3928 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3929 } while (desc_end.start_time_ns != -1);
3931 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3933 return (int64_t)bandwidth;
3936 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3938 MatroskaDemuxContext *matroska = s->priv_data;
3939 EbmlList *seekhead_list = &matroska->seekhead;
3940 MatroskaSeekhead *seekhead = seekhead_list->elem;
3942 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3946 // determine cues start and end positions
3947 for (i = 0; i < seekhead_list->nb_elem; i++)
3948 if (seekhead[i].id == MATROSKA_ID_CUES)
3951 if (i >= seekhead_list->nb_elem) return -1;
3953 before_pos = avio_tell(matroska->ctx->pb);
3954 cues_start = seekhead[i].pos + matroska->segment_start;
3955 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3956 // cues_end is computed as cues_start + cues_length + length of the
3957 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3958 // cues_end is inclusive and the above sum is reduced by 1.
3959 uint64_t cues_length, cues_id;
3961 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3962 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3963 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3964 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3967 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3969 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3970 if (cues_start == -1 || cues_end == -1) return -1;
3973 matroska_parse_cues(matroska);
3976 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3979 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3981 // if the file has cues at the start, fix up the init range so tht
3982 // it does not include it
3983 if (cues_start <= init_range)
3984 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3987 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3988 if (bandwidth < 0) return -1;
3989 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3991 // check if all clusters start with key frames
3992 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3994 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3995 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3996 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3997 if (!buf) return -1;
3999 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4000 int ret = snprintf(buf + end, 20,
4001 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4002 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4003 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4004 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4006 return AVERROR_INVALIDDATA;
4010 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4016 static int webm_dash_manifest_read_header(AVFormatContext *s)
4019 int ret = matroska_read_header(s);
4021 MatroskaTrack *tracks;
4022 MatroskaDemuxContext *matroska = s->priv_data;
4024 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4027 if (!s->nb_streams) {
4028 matroska_read_close(s);
4029 av_log(s, AV_LOG_ERROR, "No streams found\n");
4030 return AVERROR_INVALIDDATA;
4033 if (!matroska->is_live) {
4034 buf = av_asprintf("%g", matroska->duration);
4035 if (!buf) return AVERROR(ENOMEM);
4036 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4039 // initialization range
4040 // 5 is the offset of Cluster ID.
4041 init_range = avio_tell(s->pb) - 5;
4042 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4045 // basename of the file
4046 buf = strrchr(s->url, '/');
4047 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4050 tracks = matroska->tracks.elem;
4051 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4053 // parse the cues and populate Cue related fields
4054 if (!matroska->is_live) {
4055 ret = webm_dash_manifest_cues(s, init_range);
4057 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4062 // use the bandwidth from the command line if it was provided
4063 if (matroska->bandwidth > 0) {
4064 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4065 matroska->bandwidth, 0);
4070 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4075 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4076 static const AVOption options[] = {
4077 { "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 },
4078 { "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 },
4082 static const AVClass webm_dash_class = {
4083 .class_name = "WebM DASH Manifest demuxer",
4084 .item_name = av_default_item_name,
4086 .version = LIBAVUTIL_VERSION_INT,
4089 AVInputFormat ff_matroska_demuxer = {
4090 .name = "matroska,webm",
4091 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4092 .extensions = "mkv,mk3d,mka,mks",
4093 .priv_data_size = sizeof(MatroskaDemuxContext),
4094 .read_probe = matroska_probe,
4095 .read_header = matroska_read_header,
4096 .read_packet = matroska_read_packet,
4097 .read_close = matroska_read_close,
4098 .read_seek = matroska_read_seek,
4099 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4102 AVInputFormat ff_webm_dash_manifest_demuxer = {
4103 .name = "webm_dash_manifest",
4104 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4105 .priv_data_size = sizeof(MatroskaDemuxContext),
4106 .read_header = webm_dash_manifest_read_header,
4107 .read_packet = webm_dash_manifest_read_packet,
4108 .read_close = matroska_read_close,
4109 .priv_class = &webm_dash_class,