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"
86 typedef const struct EbmlSyntax {
96 const struct EbmlSyntax *n;
100 typedef struct EbmlList {
105 typedef struct EbmlBin {
112 typedef struct Ebml {
117 uint64_t doctype_version;
120 typedef struct MatroskaTrackCompression {
123 } MatroskaTrackCompression;
125 typedef struct MatroskaTrackEncryption {
128 } MatroskaTrackEncryption;
130 typedef struct MatroskaTrackEncoding {
133 MatroskaTrackCompression compression;
134 MatroskaTrackEncryption encryption;
135 } MatroskaTrackEncoding;
137 typedef struct MatroskaMasteringMeta {
146 double max_luminance;
147 double min_luminance;
148 } MatroskaMasteringMeta;
150 typedef struct MatroskaTrackVideoColor {
151 uint64_t matrix_coefficients;
152 uint64_t bits_per_channel;
153 uint64_t chroma_sub_horz;
154 uint64_t chroma_sub_vert;
155 uint64_t cb_sub_horz;
156 uint64_t cb_sub_vert;
157 uint64_t chroma_siting_horz;
158 uint64_t chroma_siting_vert;
160 uint64_t transfer_characteristics;
164 MatroskaMasteringMeta mastering_meta;
165 } MatroskaTrackVideoColor;
167 typedef struct MatroskaTrackVideoProjection {
173 } MatroskaTrackVideoProjection;
175 typedef struct MatroskaTrackVideo {
177 uint64_t display_width;
178 uint64_t display_height;
179 uint64_t pixel_width;
180 uint64_t pixel_height;
182 uint64_t display_unit;
184 uint64_t field_order;
185 uint64_t stereo_mode;
188 MatroskaTrackVideoProjection projection;
189 } MatroskaTrackVideo;
191 typedef struct MatroskaTrackAudio {
193 double out_samplerate;
197 /* real audio header (extracted from extradata) */
204 uint64_t buf_timecode;
206 } MatroskaTrackAudio;
208 typedef struct MatroskaTrackPlane {
211 } MatroskaTrackPlane;
213 typedef struct MatroskaTrackOperation {
214 EbmlList combine_planes;
215 } MatroskaTrackOperation;
217 typedef struct MatroskaTrack {
226 uint64_t default_duration;
227 uint64_t flag_default;
228 uint64_t flag_forced;
229 uint64_t seek_preroll;
230 MatroskaTrackVideo video;
231 MatroskaTrackAudio audio;
232 MatroskaTrackOperation operation;
234 uint64_t codec_delay;
235 uint64_t codec_delay_in_track_tb;
238 int64_t end_timecode;
240 uint64_t max_block_additional_id;
242 uint32_t palette[AVPALETTE_COUNT];
246 typedef struct MatroskaAttachment {
253 } MatroskaAttachment;
255 typedef struct MatroskaChapter {
264 typedef struct MatroskaIndexPos {
269 typedef struct MatroskaIndex {
274 typedef struct MatroskaTag {
282 typedef struct MatroskaTagTarget {
290 typedef struct MatroskaTags {
291 MatroskaTagTarget target;
295 typedef struct MatroskaSeekhead {
300 typedef struct MatroskaLevel {
305 typedef struct MatroskaCluster {
310 typedef struct MatroskaLevel1Element {
314 } MatroskaLevel1Element;
316 typedef struct MatroskaDemuxContext {
317 const AVClass *class;
318 AVFormatContext *ctx;
322 MatroskaLevel levels[EBML_MAX_DEPTH];
332 EbmlList attachments;
338 /* byte position of the segment inside the stream */
339 int64_t segment_start;
341 /* the packet queue */
343 AVPacketList *queue_end;
347 /* What to skip before effectively reading a packet. */
348 int skip_to_keyframe;
349 uint64_t skip_to_timecode;
351 /* File has a CUES element, but we defer parsing until it is needed. */
352 int cues_parsing_deferred;
354 /* Level1 elements and whether they were read yet */
355 MatroskaLevel1Element level1_elems[64];
356 int num_level1_elems;
358 int current_cluster_num_blocks;
359 int64_t current_cluster_pos;
360 MatroskaCluster current_cluster;
362 /* File has SSA subtitles which prevent incremental cluster parsing. */
365 /* WebM DASH Manifest live flag */
368 /* Bandwidth value for WebM DASH Manifest */
370 } MatroskaDemuxContext;
372 typedef struct MatroskaBlock {
377 uint64_t additional_id;
379 int64_t discard_padding;
382 static const EbmlSyntax ebml_header[] = {
383 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
384 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
385 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
386 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
387 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
388 { EBML_ID_EBMLVERSION, EBML_NONE },
389 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
393 static const EbmlSyntax ebml_syntax[] = {
394 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
398 static const EbmlSyntax matroska_info[] = {
399 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
400 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
401 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
402 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
403 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
404 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
405 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
409 static const EbmlSyntax matroska_mastering_meta[] = {
410 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
411 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
412 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
413 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
414 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
415 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
416 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
417 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
418 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
419 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
423 static const EbmlSyntax matroska_track_video_color[] = {
424 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
425 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
426 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
427 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
428 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
429 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
430 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
431 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
432 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
433 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
435 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
436 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
437 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
441 static const EbmlSyntax matroska_track_video_projection[] = {
442 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
443 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
444 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
445 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
446 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
450 static const EbmlSyntax matroska_track_video[] = {
451 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
452 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
453 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
454 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
455 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
456 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
457 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
458 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
459 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
460 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
461 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
462 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
463 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
464 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
465 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
466 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
467 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
468 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
472 static const EbmlSyntax matroska_track_audio[] = {
473 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
474 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
475 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
476 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
480 static const EbmlSyntax matroska_track_encoding_compression[] = {
481 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
482 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
486 static const EbmlSyntax matroska_track_encoding_encryption[] = {
487 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
488 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
489 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
490 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
491 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
492 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
493 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
496 static const EbmlSyntax matroska_track_encoding[] = {
497 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
498 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
499 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
500 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
501 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
505 static const EbmlSyntax matroska_track_encodings[] = {
506 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
510 static const EbmlSyntax matroska_track_plane[] = {
511 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
512 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
516 static const EbmlSyntax matroska_track_combine_planes[] = {
517 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
521 static const EbmlSyntax matroska_track_operation[] = {
522 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
526 static const EbmlSyntax matroska_track[] = {
527 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
528 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
529 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
530 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
531 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
532 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
533 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
534 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
535 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
536 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
537 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
538 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
539 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
540 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
541 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
542 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
543 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
544 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
545 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
546 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
547 { MATROSKA_ID_CODECNAME, EBML_NONE },
548 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
549 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
550 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
551 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
552 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
556 static const EbmlSyntax matroska_tracks[] = {
557 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
561 static const EbmlSyntax matroska_attachment[] = {
562 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
563 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
564 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
565 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
566 { MATROSKA_ID_FILEDESC, EBML_NONE },
570 static const EbmlSyntax matroska_attachments[] = {
571 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
575 static const EbmlSyntax matroska_chapter_display[] = {
576 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
577 { MATROSKA_ID_CHAPLANG, EBML_NONE },
578 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
582 static const EbmlSyntax matroska_chapter_entry[] = {
583 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
584 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
585 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
586 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
587 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
588 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
589 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
590 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
594 static const EbmlSyntax matroska_chapter[] = {
595 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
596 { MATROSKA_ID_EDITIONUID, EBML_NONE },
597 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
598 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
599 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
603 static const EbmlSyntax matroska_chapters[] = {
604 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
608 static const EbmlSyntax matroska_index_pos[] = {
609 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
610 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
611 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
612 { MATROSKA_ID_CUEDURATION, EBML_NONE },
613 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
617 static const EbmlSyntax matroska_index_entry[] = {
618 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
619 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
623 static const EbmlSyntax matroska_index[] = {
624 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
628 static const EbmlSyntax matroska_simpletag[] = {
629 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
630 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
631 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
632 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
633 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
634 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
638 static const EbmlSyntax matroska_tagtargets[] = {
639 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
640 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
641 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
642 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
643 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
647 static const EbmlSyntax matroska_tag[] = {
648 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
649 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
653 static const EbmlSyntax matroska_tags[] = {
654 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
658 static const EbmlSyntax matroska_seekhead_entry[] = {
659 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
660 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
664 static const EbmlSyntax matroska_seekhead[] = {
665 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
669 static const EbmlSyntax matroska_segment[] = {
670 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
671 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
672 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
673 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
674 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
675 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
676 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
677 { MATROSKA_ID_CLUSTER, EBML_STOP },
681 static const EbmlSyntax matroska_segments[] = {
682 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
686 static const EbmlSyntax matroska_blockmore[] = {
687 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
688 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
692 static const EbmlSyntax matroska_blockadditions[] = {
693 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
697 static const EbmlSyntax matroska_blockgroup[] = {
698 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
699 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
700 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
701 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
702 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
703 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
704 { MATROSKA_ID_CODECSTATE, EBML_NONE },
705 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
709 static const EbmlSyntax matroska_cluster[] = {
710 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
711 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
712 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
713 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
714 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
718 static const EbmlSyntax matroska_clusters[] = {
719 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
720 { MATROSKA_ID_INFO, EBML_NONE },
721 { MATROSKA_ID_CUES, EBML_NONE },
722 { MATROSKA_ID_TAGS, EBML_NONE },
723 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
727 static const EbmlSyntax matroska_cluster_incremental_parsing[] = {
728 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
729 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
730 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster, blocks), { .n = matroska_blockgroup } },
731 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
732 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
733 { MATROSKA_ID_INFO, EBML_NONE },
734 { MATROSKA_ID_CUES, EBML_NONE },
735 { MATROSKA_ID_TAGS, EBML_NONE },
736 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
737 { MATROSKA_ID_CLUSTER, EBML_STOP },
741 static const EbmlSyntax matroska_cluster_incremental[] = {
742 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
743 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
744 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
745 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
746 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
750 static const EbmlSyntax matroska_clusters_incremental[] = {
751 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster_incremental } },
752 { MATROSKA_ID_INFO, EBML_NONE },
753 { MATROSKA_ID_CUES, EBML_NONE },
754 { MATROSKA_ID_TAGS, EBML_NONE },
755 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
759 static const char *const matroska_doctypes[] = { "matroska", "webm" };
761 static int matroska_read_close(AVFormatContext *s);
763 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
765 AVIOContext *pb = matroska->ctx->pb;
768 matroska->current_id = 0;
769 matroska->num_levels = 0;
771 /* seek to next position to resync from */
772 if ((ret = avio_seek(pb, last_pos + 1, SEEK_SET)) < 0) {
779 // try to find a toplevel element
780 while (!avio_feof(pb)) {
781 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
782 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
783 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
784 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
785 matroska->current_id = id;
788 id = (id << 8) | avio_r8(pb);
796 * Return: Whether we reached the end of a level in the hierarchy or not.
798 static int ebml_level_end(MatroskaDemuxContext *matroska)
800 AVIOContext *pb = matroska->ctx->pb;
801 int64_t pos = avio_tell(pb);
803 if (matroska->num_levels > 0) {
804 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
805 if (pos - level->start >= level->length || matroska->current_id) {
806 matroska->num_levels--;
810 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
814 * Read: an "EBML number", which is defined as a variable-length
815 * array of bytes. The first byte indicates the length by giving a
816 * number of 0-bits followed by a one. The position of the first
817 * "one" bit inside the first byte indicates the length of this
819 * Returns: number of bytes read, < 0 on error
821 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
822 int max_size, uint64_t *number)
827 /* The first byte tells us the length in bytes - avio_r8() can normally
828 * return 0, but since that's not a valid first ebmlID byte, we can
829 * use it safely here to catch EOS. */
830 if (!(total = avio_r8(pb))) {
831 /* we might encounter EOS here */
832 if (!avio_feof(pb)) {
833 int64_t pos = avio_tell(pb);
834 av_log(matroska->ctx, AV_LOG_ERROR,
835 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
837 return pb->error ? pb->error : AVERROR(EIO);
842 /* get the length of the EBML number */
843 read = 8 - ff_log2_tab[total];
844 if (read > max_size) {
845 int64_t pos = avio_tell(pb) - 1;
846 av_log(matroska->ctx, AV_LOG_ERROR,
847 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
848 (uint8_t) total, pos, pos);
849 return AVERROR_INVALIDDATA;
852 /* read out length */
853 total ^= 1 << ff_log2_tab[total];
855 total = (total << 8) | avio_r8(pb);
863 * Read a EBML length value.
864 * This needs special handling for the "unknown length" case which has multiple
867 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
870 int res = ebml_read_num(matroska, pb, 8, number);
871 if (res > 0 && *number + 1 == 1ULL << (7 * res))
872 *number = 0xffffffffffffffULL;
877 * Read the next element as an unsigned int.
878 * 0 is success, < 0 is failure.
880 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
885 return AVERROR_INVALIDDATA;
887 /* big-endian ordering; build up number */
890 *num = (*num << 8) | avio_r8(pb);
896 * Read the next element as a signed int.
897 * 0 is success, < 0 is failure.
899 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
904 return AVERROR_INVALIDDATA;
909 *num = sign_extend(avio_r8(pb), 8);
911 /* big-endian ordering; build up number */
913 *num = ((uint64_t)*num << 8) | avio_r8(pb);
920 * Read the next element as a float.
921 * 0 is success, < 0 is failure.
923 static int ebml_read_float(AVIOContext *pb, int size, double *num)
928 *num = av_int2float(avio_rb32(pb));
930 *num = av_int2double(avio_rb64(pb));
932 return AVERROR_INVALIDDATA;
938 * Read the next element as an ASCII string.
939 * 0 is success, < 0 is failure.
941 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
945 /* EBML strings are usually not 0-terminated, so we allocate one
946 * byte more, read the string and NULL-terminate it ourselves. */
947 if (!(res = av_malloc(size + 1)))
948 return AVERROR(ENOMEM);
949 if (avio_read(pb, (uint8_t *) res, size) != size) {
961 * Read the next element as binary data.
962 * 0 is success, < 0 is failure.
964 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
968 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
971 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
973 bin->data = bin->buf->data;
975 bin->pos = avio_tell(pb);
976 if (avio_read(pb, bin->data, length) != length) {
977 av_buffer_unref(&bin->buf);
987 * Read the next element, but only the header. The contents
988 * are supposed to be sub-elements which can be read separately.
989 * 0 is success, < 0 is failure.
991 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
993 AVIOContext *pb = matroska->ctx->pb;
994 MatroskaLevel *level;
996 if (matroska->num_levels >= EBML_MAX_DEPTH) {
997 av_log(matroska->ctx, AV_LOG_ERROR,
998 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
999 return AVERROR(ENOSYS);
1002 level = &matroska->levels[matroska->num_levels++];
1003 level->start = avio_tell(pb);
1004 level->length = length;
1010 * Read signed/unsigned "EBML" numbers.
1011 * Return: number of bytes processed, < 0 on error
1013 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1014 uint8_t *data, uint32_t size, uint64_t *num)
1017 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1018 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
1022 * Same as above, but signed.
1024 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1025 uint8_t *data, uint32_t size, int64_t *num)
1030 /* read as unsigned number first */
1031 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1034 /* make signed (weird way) */
1035 *num = unum - ((1LL << (7 * res - 1)) - 1);
1040 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
1041 EbmlSyntax *syntax, void *data);
1043 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1044 uint32_t id, void *data)
1047 for (i = 0; syntax[i].id; i++)
1048 if (id == syntax[i].id)
1050 if (!syntax[i].id && id == MATROSKA_ID_CLUSTER &&
1051 matroska->num_levels > 0 &&
1052 matroska->levels[matroska->num_levels - 1].length == 0xffffffffffffff)
1053 return 0; // we reached the end of an unknown size cluster
1054 if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1055 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1057 return ebml_parse_elem(matroska, &syntax[i], data);
1060 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1063 if (!matroska->current_id) {
1065 int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
1067 // in live mode, finish parsing if EOF is reached.
1068 return (matroska->is_live && matroska->ctx->pb->eof_reached &&
1069 res == AVERROR_EOF) ? 1 : res;
1071 matroska->current_id = id | 1 << 7 * res;
1073 return ebml_parse_id(matroska, syntax, matroska->current_id, data);
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_elem(MatroskaDemuxContext *matroska,
1159 EbmlSyntax *syntax, void *data)
1161 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1164 // max. 16 MB for strings
1165 [EBML_STR] = 0x1000000,
1166 [EBML_UTF8] = 0x1000000,
1167 // max. 256 MB for binary data
1168 [EBML_BIN] = 0x10000000,
1169 // no limits for anything else
1171 AVIOContext *pb = matroska->ctx->pb;
1172 uint32_t id = syntax->id;
1176 MatroskaLevel1Element *level1_elem;
1178 data = (char *) data + syntax->data_offset;
1179 if (syntax->list_elem_size) {
1180 EbmlList *list = data;
1181 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1183 return AVERROR(ENOMEM);
1184 list->elem = newelem;
1185 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1186 memset(data, 0, syntax->list_elem_size);
1190 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP) {
1191 matroska->current_id = 0;
1192 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1194 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1195 av_log(matroska->ctx, AV_LOG_ERROR,
1196 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1197 length, max_lengths[syntax->type], syntax->type);
1198 return AVERROR_INVALIDDATA;
1202 switch (syntax->type) {
1204 res = ebml_read_uint(pb, length, data);
1207 res = ebml_read_sint(pb, length, data);
1210 res = ebml_read_float(pb, length, data);
1214 res = ebml_read_ascii(pb, length, data);
1217 res = ebml_read_binary(pb, length, data);
1221 if ((res = ebml_read_master(matroska, length)) < 0)
1223 if (id == MATROSKA_ID_SEGMENT)
1224 matroska->segment_start = avio_tell(matroska->ctx->pb);
1225 if (id == MATROSKA_ID_CUES)
1226 matroska->cues_parsing_deferred = 0;
1227 if (syntax->type == EBML_LEVEL1 &&
1228 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1229 if (level1_elem->parsed)
1230 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1231 level1_elem->parsed = 1;
1233 return ebml_parse_nest(matroska, syntax->def.n, data);
1235 return ebml_parse_id(matroska, syntax->def.n, id, data);
1239 if (ffio_limit(pb, length) != length)
1240 return AVERROR(EIO);
1241 return avio_skip(pb, length) < 0 ? AVERROR(EIO) : 0;
1243 if (res == AVERROR_INVALIDDATA)
1244 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1245 else if (res == AVERROR(EIO))
1246 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1250 static void ebml_free(EbmlSyntax *syntax, void *data)
1253 for (i = 0; syntax[i].id; i++) {
1254 void *data_off = (char *) data + syntax[i].data_offset;
1255 switch (syntax[i].type) {
1261 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1265 if (syntax[i].list_elem_size) {
1266 EbmlList *list = data_off;
1267 char *ptr = list->elem;
1268 for (j = 0; j < list->nb_elem;
1269 j++, ptr += syntax[i].list_elem_size)
1270 ebml_free(syntax[i].def.n, ptr);
1271 av_freep(&list->elem);
1274 ebml_free(syntax[i].def.n, data_off);
1284 static int matroska_probe(AVProbeData *p)
1287 int len_mask = 0x80, size = 1, n = 1, i;
1290 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1293 /* length of header */
1295 while (size <= 8 && !(total & len_mask)) {
1301 total &= (len_mask - 1);
1303 total = (total << 8) | p->buf[4 + n++];
1305 /* Does the probe data contain the whole header? */
1306 if (p->buf_size < 4 + size + total)
1309 /* The header should contain a known document type. For now,
1310 * we don't parse the whole header but simply check for the
1311 * availability of that array of characters inside the header.
1312 * Not fully fool-proof, but good enough. */
1313 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1314 size_t probelen = strlen(matroska_doctypes[i]);
1315 if (total < probelen)
1317 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1318 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1319 return AVPROBE_SCORE_MAX;
1322 // probably valid EBML header but no recognized doctype
1323 return AVPROBE_SCORE_EXTENSION;
1326 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1329 MatroskaTrack *tracks = matroska->tracks.elem;
1332 for (i = 0; i < matroska->tracks.nb_elem; i++)
1333 if (tracks[i].num == num)
1336 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1340 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1341 MatroskaTrack *track)
1343 MatroskaTrackEncoding *encodings = track->encodings.elem;
1344 uint8_t *data = *buf;
1345 int isize = *buf_size;
1346 uint8_t *pkt_data = NULL;
1347 uint8_t av_unused *newpktdata;
1348 int pkt_size = isize;
1352 if (pkt_size >= 10000000U)
1353 return AVERROR_INVALIDDATA;
1355 switch (encodings[0].compression.algo) {
1356 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1358 int header_size = encodings[0].compression.settings.size;
1359 uint8_t *header = encodings[0].compression.settings.data;
1361 if (header_size && !header) {
1362 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1369 pkt_size = isize + header_size;
1370 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1372 return AVERROR(ENOMEM);
1374 memcpy(pkt_data, header, header_size);
1375 memcpy(pkt_data + header_size, data, isize);
1379 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1381 olen = pkt_size *= 3;
1382 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1383 + AV_INPUT_BUFFER_PADDING_SIZE);
1385 result = AVERROR(ENOMEM);
1388 pkt_data = newpktdata;
1389 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1390 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1392 result = AVERROR_INVALIDDATA;
1399 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1401 z_stream zstream = { 0 };
1402 if (inflateInit(&zstream) != Z_OK)
1404 zstream.next_in = data;
1405 zstream.avail_in = isize;
1408 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1410 inflateEnd(&zstream);
1411 result = AVERROR(ENOMEM);
1414 pkt_data = newpktdata;
1415 zstream.avail_out = pkt_size - zstream.total_out;
1416 zstream.next_out = pkt_data + zstream.total_out;
1417 result = inflate(&zstream, Z_NO_FLUSH);
1418 } while (result == Z_OK && pkt_size < 10000000);
1419 pkt_size = zstream.total_out;
1420 inflateEnd(&zstream);
1421 if (result != Z_STREAM_END) {
1422 if (result == Z_MEM_ERROR)
1423 result = AVERROR(ENOMEM);
1425 result = AVERROR_INVALIDDATA;
1432 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1434 bz_stream bzstream = { 0 };
1435 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1437 bzstream.next_in = data;
1438 bzstream.avail_in = isize;
1441 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1443 BZ2_bzDecompressEnd(&bzstream);
1444 result = AVERROR(ENOMEM);
1447 pkt_data = newpktdata;
1448 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1449 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1450 result = BZ2_bzDecompress(&bzstream);
1451 } while (result == BZ_OK && pkt_size < 10000000);
1452 pkt_size = bzstream.total_out_lo32;
1453 BZ2_bzDecompressEnd(&bzstream);
1454 if (result != BZ_STREAM_END) {
1455 if (result == BZ_MEM_ERROR)
1456 result = AVERROR(ENOMEM);
1458 result = AVERROR_INVALIDDATA;
1465 return AVERROR_INVALIDDATA;
1468 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1471 *buf_size = pkt_size;
1479 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1480 AVDictionary **metadata, char *prefix)
1482 MatroskaTag *tags = list->elem;
1486 for (i = 0; i < list->nb_elem; i++) {
1487 const char *lang = tags[i].lang &&
1488 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1490 if (!tags[i].name) {
1491 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1495 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1497 av_strlcpy(key, tags[i].name, sizeof(key));
1498 if (tags[i].def || !lang) {
1499 av_dict_set(metadata, key, tags[i].string, 0);
1500 if (tags[i].sub.nb_elem)
1501 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1504 av_strlcat(key, "-", sizeof(key));
1505 av_strlcat(key, lang, sizeof(key));
1506 av_dict_set(metadata, key, tags[i].string, 0);
1507 if (tags[i].sub.nb_elem)
1508 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1511 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1514 static void matroska_convert_tags(AVFormatContext *s)
1516 MatroskaDemuxContext *matroska = s->priv_data;
1517 MatroskaTags *tags = matroska->tags.elem;
1520 for (i = 0; i < matroska->tags.nb_elem; i++) {
1521 if (tags[i].target.attachuid) {
1522 MatroskaAttachment *attachment = matroska->attachments.elem;
1524 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1525 if (attachment[j].uid == tags[i].target.attachuid &&
1526 attachment[j].stream) {
1527 matroska_convert_tag(s, &tags[i].tag,
1528 &attachment[j].stream->metadata, NULL);
1533 av_log(NULL, AV_LOG_WARNING,
1534 "The tags at index %d refer to a "
1535 "non-existent attachment %"PRId64".\n",
1536 i, tags[i].target.attachuid);
1538 } else if (tags[i].target.chapteruid) {
1539 MatroskaChapter *chapter = matroska->chapters.elem;
1541 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1542 if (chapter[j].uid == tags[i].target.chapteruid &&
1543 chapter[j].chapter) {
1544 matroska_convert_tag(s, &tags[i].tag,
1545 &chapter[j].chapter->metadata, NULL);
1550 av_log(NULL, AV_LOG_WARNING,
1551 "The tags at index %d refer to a non-existent chapter "
1553 i, tags[i].target.chapteruid);
1555 } else if (tags[i].target.trackuid) {
1556 MatroskaTrack *track = matroska->tracks.elem;
1558 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1559 if (track[j].uid == tags[i].target.trackuid &&
1561 matroska_convert_tag(s, &tags[i].tag,
1562 &track[j].stream->metadata, NULL);
1567 av_log(NULL, AV_LOG_WARNING,
1568 "The tags at index %d refer to a non-existent track "
1570 i, tags[i].target.trackuid);
1573 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1574 tags[i].target.type);
1579 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1582 uint32_t level_up = matroska->level_up;
1583 uint32_t saved_id = matroska->current_id;
1584 int64_t before_pos = avio_tell(matroska->ctx->pb);
1585 MatroskaLevel level;
1590 offset = pos + matroska->segment_start;
1591 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1592 /* We don't want to lose our seekhead level, so we add
1593 * a dummy. This is a crude hack. */
1594 if (matroska->num_levels == EBML_MAX_DEPTH) {
1595 av_log(matroska->ctx, AV_LOG_INFO,
1596 "Max EBML element depth (%d) reached, "
1597 "cannot parse further.\n", EBML_MAX_DEPTH);
1598 ret = AVERROR_INVALIDDATA;
1601 level.length = (uint64_t) -1;
1602 matroska->levels[matroska->num_levels] = level;
1603 matroska->num_levels++;
1604 matroska->current_id = 0;
1606 ret = ebml_parse(matroska, matroska_segment, matroska);
1608 /* remove dummy level */
1609 while (matroska->num_levels) {
1610 uint64_t length = matroska->levels[--matroska->num_levels].length;
1611 if (length == (uint64_t) -1)
1617 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
1618 matroska->level_up = level_up;
1619 matroska->current_id = saved_id;
1624 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1626 EbmlList *seekhead_list = &matroska->seekhead;
1629 // we should not do any seeking in the streaming case
1630 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1633 for (i = 0; i < seekhead_list->nb_elem; i++) {
1634 MatroskaSeekhead *seekheads = seekhead_list->elem;
1635 uint32_t id = seekheads[i].id;
1636 uint64_t pos = seekheads[i].pos;
1638 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1639 if (!elem || elem->parsed)
1644 // defer cues parsing until we actually need cue data.
1645 if (id == MATROSKA_ID_CUES)
1648 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1649 // mark index as broken
1650 matroska->cues_parsing_deferred = -1;
1658 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1660 EbmlList *index_list;
1661 MatroskaIndex *index;
1662 uint64_t index_scale = 1;
1665 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1668 index_list = &matroska->index;
1669 index = index_list->elem;
1670 if (index_list->nb_elem < 2)
1672 if (index[1].time > 1E14 / matroska->time_scale) {
1673 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1676 for (i = 0; i < index_list->nb_elem; i++) {
1677 EbmlList *pos_list = &index[i].pos;
1678 MatroskaIndexPos *pos = pos_list->elem;
1679 for (j = 0; j < pos_list->nb_elem; j++) {
1680 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1682 if (track && track->stream)
1683 av_add_index_entry(track->stream,
1684 pos[j].pos + matroska->segment_start,
1685 index[i].time / index_scale, 0, 0,
1691 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1694 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1697 for (i = 0; i < matroska->num_level1_elems; i++) {
1698 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1699 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1700 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1701 matroska->cues_parsing_deferred = -1;
1707 matroska_add_index_entries(matroska);
1710 static int matroska_aac_profile(char *codec_id)
1712 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1715 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1716 if (strstr(codec_id, aac_profiles[profile]))
1721 static int matroska_aac_sri(int samplerate)
1725 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1726 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1731 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1733 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1734 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1737 static int matroska_parse_flac(AVFormatContext *s,
1738 MatroskaTrack *track,
1741 AVStream *st = track->stream;
1742 uint8_t *p = track->codec_priv.data;
1743 int size = track->codec_priv.size;
1745 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1746 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1747 track->codec_priv.size = 0;
1751 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1753 p += track->codec_priv.size;
1754 size -= track->codec_priv.size;
1756 /* parse the remaining metadata blocks if present */
1758 int block_last, block_type, block_size;
1760 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1764 if (block_size > size)
1767 /* check for the channel mask */
1768 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1769 AVDictionary *dict = NULL;
1770 AVDictionaryEntry *chmask;
1772 ff_vorbis_comment(s, &dict, p, block_size, 0);
1773 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1775 uint64_t mask = strtol(chmask->value, NULL, 0);
1776 if (!mask || mask & ~0x3ffffULL) {
1777 av_log(s, AV_LOG_WARNING,
1778 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1780 st->codecpar->channel_layout = mask;
1782 av_dict_free(&dict);
1792 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1794 int major, minor, micro, bttb = 0;
1796 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1797 * this function, and fixed in 57.52 */
1798 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1799 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1801 switch (field_order) {
1802 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1803 return AV_FIELD_PROGRESSIVE;
1804 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1805 return AV_FIELD_UNKNOWN;
1806 case MATROSKA_VIDEO_FIELDORDER_TT:
1808 case MATROSKA_VIDEO_FIELDORDER_BB:
1810 case MATROSKA_VIDEO_FIELDORDER_BT:
1811 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1812 case MATROSKA_VIDEO_FIELDORDER_TB:
1813 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1815 return AV_FIELD_UNKNOWN;
1819 static void mkv_stereo_mode_display_mul(int stereo_mode,
1820 int *h_width, int *h_height)
1822 switch (stereo_mode) {
1823 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1824 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1825 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1826 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1827 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1829 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1830 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1831 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1832 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1835 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1836 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1837 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1838 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1844 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1845 const MatroskaTrackVideoColor *color = track->video.color.elem;
1846 const MatroskaMasteringMeta *mastering_meta;
1847 int has_mastering_primaries, has_mastering_luminance;
1849 if (!track->video.color.nb_elem)
1852 mastering_meta = &color->mastering_meta;
1853 // Mastering primaries are CIE 1931 coords, and must be > 0.
1854 has_mastering_primaries =
1855 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1856 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1857 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1858 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1859 has_mastering_luminance = mastering_meta->max_luminance > 0;
1861 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1862 st->codecpar->color_space = color->matrix_coefficients;
1863 if (color->primaries != AVCOL_PRI_RESERVED &&
1864 color->primaries != AVCOL_PRI_RESERVED0)
1865 st->codecpar->color_primaries = color->primaries;
1866 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1867 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1868 st->codecpar->color_trc = color->transfer_characteristics;
1869 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1870 color->range <= AVCOL_RANGE_JPEG)
1871 st->codecpar->color_range = color->range;
1872 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1873 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1874 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1875 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1876 st->codecpar->chroma_location =
1877 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1878 (color->chroma_siting_vert - 1) << 7);
1880 if (color->max_cll && color->max_fall) {
1883 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1885 return AVERROR(ENOMEM);
1886 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1887 (uint8_t *)metadata, size);
1889 av_freep(&metadata);
1892 metadata->MaxCLL = color->max_cll;
1893 metadata->MaxFALL = color->max_fall;
1896 if (has_mastering_primaries || has_mastering_luminance) {
1897 // Use similar rationals as other standards.
1898 const int chroma_den = 50000;
1899 const int luma_den = 10000;
1900 AVMasteringDisplayMetadata *metadata =
1901 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1902 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1903 sizeof(AVMasteringDisplayMetadata));
1905 return AVERROR(ENOMEM);
1907 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
1908 if (has_mastering_primaries) {
1909 metadata->display_primaries[0][0] = av_make_q(
1910 round(mastering_meta->r_x * chroma_den), chroma_den);
1911 metadata->display_primaries[0][1] = av_make_q(
1912 round(mastering_meta->r_y * chroma_den), chroma_den);
1913 metadata->display_primaries[1][0] = av_make_q(
1914 round(mastering_meta->g_x * chroma_den), chroma_den);
1915 metadata->display_primaries[1][1] = av_make_q(
1916 round(mastering_meta->g_y * chroma_den), chroma_den);
1917 metadata->display_primaries[2][0] = av_make_q(
1918 round(mastering_meta->b_x * chroma_den), chroma_den);
1919 metadata->display_primaries[2][1] = av_make_q(
1920 round(mastering_meta->b_y * chroma_den), chroma_den);
1921 metadata->white_point[0] = av_make_q(
1922 round(mastering_meta->white_x * chroma_den), chroma_den);
1923 metadata->white_point[1] = av_make_q(
1924 round(mastering_meta->white_y * chroma_den), chroma_den);
1925 metadata->has_primaries = 1;
1927 if (has_mastering_luminance) {
1928 metadata->max_luminance = av_make_q(
1929 round(mastering_meta->max_luminance * luma_den), luma_den);
1930 metadata->min_luminance = av_make_q(
1931 round(mastering_meta->min_luminance * luma_den), luma_den);
1932 metadata->has_luminance = 1;
1938 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
1939 AVSphericalMapping *spherical;
1940 enum AVSphericalProjection projection;
1941 size_t spherical_size;
1942 uint32_t l = 0, t = 0, r = 0, b = 0;
1943 uint32_t padding = 0;
1947 bytestream2_init(&gb, track->video.projection.private.data,
1948 track->video.projection.private.size);
1950 if (bytestream2_get_byte(&gb) != 0) {
1951 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
1955 bytestream2_skip(&gb, 3); // flags
1957 switch (track->video.projection.type) {
1958 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
1959 if (track->video.projection.private.size == 20) {
1960 t = bytestream2_get_be32(&gb);
1961 b = bytestream2_get_be32(&gb);
1962 l = bytestream2_get_be32(&gb);
1963 r = bytestream2_get_be32(&gb);
1965 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
1966 av_log(NULL, AV_LOG_ERROR,
1967 "Invalid bounding rectangle coordinates "
1968 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
1970 return AVERROR_INVALIDDATA;
1972 } else if (track->video.projection.private.size != 0) {
1973 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1974 return AVERROR_INVALIDDATA;
1977 if (l || t || r || b)
1978 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
1980 projection = AV_SPHERICAL_EQUIRECTANGULAR;
1982 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
1983 if (track->video.projection.private.size < 4) {
1984 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
1985 return AVERROR_INVALIDDATA;
1986 } else if (track->video.projection.private.size == 12) {
1987 uint32_t layout = bytestream2_get_be32(&gb);
1989 av_log(NULL, AV_LOG_WARNING,
1990 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
1993 projection = AV_SPHERICAL_CUBEMAP;
1994 padding = bytestream2_get_be32(&gb);
1996 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
1997 return AVERROR_INVALIDDATA;
2000 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2001 /* No Spherical metadata */
2004 av_log(NULL, AV_LOG_WARNING,
2005 "Unknown spherical metadata type %"PRIu64"\n",
2006 track->video.projection.type);
2010 spherical = av_spherical_alloc(&spherical_size);
2012 return AVERROR(ENOMEM);
2014 spherical->projection = projection;
2016 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2017 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2018 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2020 spherical->padding = padding;
2022 spherical->bound_left = l;
2023 spherical->bound_top = t;
2024 spherical->bound_right = r;
2025 spherical->bound_bottom = b;
2027 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2030 av_freep(&spherical);
2037 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2039 const AVCodecTag *codec_tags;
2041 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2042 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2044 /* Normalize noncompliant private data that starts with the fourcc
2045 * by expanding/shifting the data by 4 bytes and storing the data
2046 * size at the start. */
2047 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2048 int ret = av_buffer_realloc(&track->codec_priv.buf,
2049 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2053 track->codec_priv.data = track->codec_priv.buf->data;
2054 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2055 track->codec_priv.size += 4;
2056 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2059 *fourcc = AV_RL32(track->codec_priv.data + 4);
2060 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2065 static int matroska_parse_tracks(AVFormatContext *s)
2067 MatroskaDemuxContext *matroska = s->priv_data;
2068 MatroskaTrack *tracks = matroska->tracks.elem;
2073 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2074 MatroskaTrack *track = &tracks[i];
2075 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2076 EbmlList *encodings_list = &track->encodings;
2077 MatroskaTrackEncoding *encodings = encodings_list->elem;
2078 uint8_t *extradata = NULL;
2079 int extradata_size = 0;
2080 int extradata_offset = 0;
2081 uint32_t fourcc = 0;
2083 char* key_id_base64 = NULL;
2086 /* Apply some sanity checks. */
2087 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2088 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2089 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2090 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2091 av_log(matroska->ctx, AV_LOG_INFO,
2092 "Unknown or unsupported track type %"PRIu64"\n",
2096 if (!track->codec_id)
2099 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2100 isnan(track->audio.samplerate)) {
2101 av_log(matroska->ctx, AV_LOG_WARNING,
2102 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2103 track->audio.samplerate);
2104 track->audio.samplerate = 8000;
2107 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2108 if (!track->default_duration && track->video.frame_rate > 0) {
2109 double default_duration = 1000000000 / track->video.frame_rate;
2110 if (default_duration > UINT64_MAX || default_duration < 0) {
2111 av_log(matroska->ctx, AV_LOG_WARNING,
2112 "Invalid frame rate %e. Cannot calculate default duration.\n",
2113 track->video.frame_rate);
2115 track->default_duration = default_duration;
2118 if (track->video.display_width == -1)
2119 track->video.display_width = track->video.pixel_width;
2120 if (track->video.display_height == -1)
2121 track->video.display_height = track->video.pixel_height;
2122 if (track->video.color_space.size == 4)
2123 fourcc = AV_RL32(track->video.color_space.data);
2124 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2125 if (!track->audio.out_samplerate)
2126 track->audio.out_samplerate = track->audio.samplerate;
2128 if (encodings_list->nb_elem > 1) {
2129 av_log(matroska->ctx, AV_LOG_ERROR,
2130 "Multiple combined encodings not supported");
2131 } else if (encodings_list->nb_elem == 1) {
2132 if (encodings[0].type) {
2133 if (encodings[0].encryption.key_id.size > 0) {
2134 /* Save the encryption key id to be stored later as a
2136 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2137 key_id_base64 = av_malloc(b64_size);
2138 if (key_id_base64 == NULL)
2139 return AVERROR(ENOMEM);
2141 av_base64_encode(key_id_base64, b64_size,
2142 encodings[0].encryption.key_id.data,
2143 encodings[0].encryption.key_id.size);
2145 encodings[0].scope = 0;
2146 av_log(matroska->ctx, AV_LOG_ERROR,
2147 "Unsupported encoding type");
2151 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2154 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2157 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2159 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2160 encodings[0].scope = 0;
2161 av_log(matroska->ctx, AV_LOG_ERROR,
2162 "Unsupported encoding type");
2163 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2164 uint8_t *codec_priv = track->codec_priv.data;
2165 int ret = matroska_decode_buffer(&track->codec_priv.data,
2166 &track->codec_priv.size,
2169 track->codec_priv.data = NULL;
2170 track->codec_priv.size = 0;
2171 av_log(matroska->ctx, AV_LOG_ERROR,
2172 "Failed to decode codec private data\n");
2175 if (codec_priv != track->codec_priv.data) {
2176 av_buffer_unref(&track->codec_priv.buf);
2177 if (track->codec_priv.data) {
2178 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2179 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2181 if (!track->codec_priv.buf) {
2182 av_freep(&track->codec_priv.data);
2183 track->codec_priv.size = 0;
2184 return AVERROR(ENOMEM);
2191 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2192 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2193 strlen(ff_mkv_codec_tags[j].str))) {
2194 codec_id = ff_mkv_codec_tags[j].id;
2199 st = track->stream = avformat_new_stream(s, NULL);
2201 av_free(key_id_base64);
2202 return AVERROR(ENOMEM);
2205 if (key_id_base64) {
2206 /* export encryption key id as base64 metadata tag */
2207 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2208 av_freep(&key_id_base64);
2211 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2212 track->codec_priv.size >= 40 &&
2213 track->codec_priv.data) {
2214 track->ms_compat = 1;
2215 bit_depth = AV_RL16(track->codec_priv.data + 14);
2216 fourcc = AV_RL32(track->codec_priv.data + 16);
2217 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2220 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2222 extradata_offset = 40;
2223 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2224 track->codec_priv.size >= 14 &&
2225 track->codec_priv.data) {
2227 ffio_init_context(&b, track->codec_priv.data,
2228 track->codec_priv.size,
2229 0, NULL, NULL, NULL, NULL);
2230 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2233 codec_id = st->codecpar->codec_id;
2234 fourcc = st->codecpar->codec_tag;
2235 extradata_offset = FFMIN(track->codec_priv.size, 18);
2236 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2237 /* Normally 36, but allow noncompliant private data */
2238 && (track->codec_priv.size >= 32)
2239 && (track->codec_priv.data)) {
2240 uint16_t sample_size;
2241 int ret = get_qt_codec(track, &fourcc, &codec_id);
2244 sample_size = AV_RB16(track->codec_priv.data + 26);
2246 if (sample_size == 8) {
2247 fourcc = MKTAG('r','a','w',' ');
2248 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2249 } else if (sample_size == 16) {
2250 fourcc = MKTAG('t','w','o','s');
2251 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2254 if ((fourcc == MKTAG('t','w','o','s') ||
2255 fourcc == MKTAG('s','o','w','t')) &&
2257 codec_id = AV_CODEC_ID_PCM_S8;
2258 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2259 (track->codec_priv.size >= 21) &&
2260 (track->codec_priv.data)) {
2261 int ret = get_qt_codec(track, &fourcc, &codec_id);
2264 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2265 fourcc = MKTAG('S','V','Q','3');
2266 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2268 if (codec_id == AV_CODEC_ID_NONE)
2269 av_log(matroska->ctx, AV_LOG_ERROR,
2270 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2271 if (track->codec_priv.size >= 86) {
2272 bit_depth = AV_RB16(track->codec_priv.data + 82);
2273 ffio_init_context(&b, track->codec_priv.data,
2274 track->codec_priv.size,
2275 0, NULL, NULL, NULL, NULL);
2276 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2278 track->has_palette = 1;
2281 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2282 switch (track->audio.bitdepth) {
2284 codec_id = AV_CODEC_ID_PCM_U8;
2287 codec_id = AV_CODEC_ID_PCM_S24BE;
2290 codec_id = AV_CODEC_ID_PCM_S32BE;
2293 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2294 switch (track->audio.bitdepth) {
2296 codec_id = AV_CODEC_ID_PCM_U8;
2299 codec_id = AV_CODEC_ID_PCM_S24LE;
2302 codec_id = AV_CODEC_ID_PCM_S32LE;
2305 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2306 track->audio.bitdepth == 64) {
2307 codec_id = AV_CODEC_ID_PCM_F64LE;
2308 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2309 int profile = matroska_aac_profile(track->codec_id);
2310 int sri = matroska_aac_sri(track->audio.samplerate);
2311 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2313 return AVERROR(ENOMEM);
2314 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2315 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2316 if (strstr(track->codec_id, "SBR")) {
2317 sri = matroska_aac_sri(track->audio.out_samplerate);
2318 extradata[2] = 0x56;
2319 extradata[3] = 0xE5;
2320 extradata[4] = 0x80 | (sri << 3);
2324 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2325 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2326 * Create the "atom size", "tag", and "tag version" fields the
2327 * decoder expects manually. */
2328 extradata_size = 12 + track->codec_priv.size;
2329 extradata = av_mallocz(extradata_size +
2330 AV_INPUT_BUFFER_PADDING_SIZE);
2332 return AVERROR(ENOMEM);
2333 AV_WB32(extradata, extradata_size);
2334 memcpy(&extradata[4], "alac", 4);
2335 AV_WB32(&extradata[8], 0);
2336 memcpy(&extradata[12], track->codec_priv.data,
2337 track->codec_priv.size);
2338 } else if (codec_id == AV_CODEC_ID_TTA) {
2339 extradata_size = 30;
2340 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2342 return AVERROR(ENOMEM);
2343 ffio_init_context(&b, extradata, extradata_size, 1,
2344 NULL, NULL, NULL, NULL);
2345 avio_write(&b, "TTA1", 4);
2347 if (track->audio.channels > UINT16_MAX ||
2348 track->audio.bitdepth > UINT16_MAX) {
2349 av_log(matroska->ctx, AV_LOG_WARNING,
2350 "Too large audio channel number %"PRIu64
2351 " or bitdepth %"PRIu64". Skipping track.\n",
2352 track->audio.channels, track->audio.bitdepth);
2353 av_freep(&extradata);
2354 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2355 return AVERROR_INVALIDDATA;
2359 avio_wl16(&b, track->audio.channels);
2360 avio_wl16(&b, track->audio.bitdepth);
2361 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2362 return AVERROR_INVALIDDATA;
2363 avio_wl32(&b, track->audio.out_samplerate);
2364 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2365 track->audio.out_samplerate,
2366 AV_TIME_BASE * 1000));
2367 } else if (codec_id == AV_CODEC_ID_RV10 ||
2368 codec_id == AV_CODEC_ID_RV20 ||
2369 codec_id == AV_CODEC_ID_RV30 ||
2370 codec_id == AV_CODEC_ID_RV40) {
2371 extradata_offset = 26;
2372 } else if (codec_id == AV_CODEC_ID_RA_144) {
2373 track->audio.out_samplerate = 8000;
2374 track->audio.channels = 1;
2375 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2376 codec_id == AV_CODEC_ID_COOK ||
2377 codec_id == AV_CODEC_ID_ATRAC3 ||
2378 codec_id == AV_CODEC_ID_SIPR)
2379 && track->codec_priv.data) {
2382 ffio_init_context(&b, track->codec_priv.data,
2383 track->codec_priv.size,
2384 0, NULL, NULL, NULL, NULL);
2386 flavor = avio_rb16(&b);
2387 track->audio.coded_framesize = avio_rb32(&b);
2389 track->audio.sub_packet_h = avio_rb16(&b);
2390 track->audio.frame_size = avio_rb16(&b);
2391 track->audio.sub_packet_size = avio_rb16(&b);
2393 track->audio.coded_framesize <= 0 ||
2394 track->audio.sub_packet_h <= 0 ||
2395 track->audio.frame_size <= 0 ||
2396 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2397 return AVERROR_INVALIDDATA;
2398 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2399 track->audio.frame_size);
2400 if (!track->audio.buf)
2401 return AVERROR(ENOMEM);
2402 if (codec_id == AV_CODEC_ID_RA_288) {
2403 st->codecpar->block_align = track->audio.coded_framesize;
2404 track->codec_priv.size = 0;
2406 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2407 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2408 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2409 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2411 st->codecpar->block_align = track->audio.sub_packet_size;
2412 extradata_offset = 78;
2414 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2415 ret = matroska_parse_flac(s, track, &extradata_offset);
2418 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2419 fourcc = AV_RL32(track->codec_priv.data);
2420 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2421 /* we don't need any value stored in CodecPrivate.
2422 make sure that it's not exported as extradata. */
2423 track->codec_priv.size = 0;
2424 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2425 /* For now, propagate only the OBUs, if any. Once libavcodec is
2426 updated to handle isobmff style extradata this can be removed. */
2427 extradata_offset = 4;
2429 track->codec_priv.size -= extradata_offset;
2431 if (codec_id == AV_CODEC_ID_NONE)
2432 av_log(matroska->ctx, AV_LOG_INFO,
2433 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2435 if (track->time_scale < 0.01)
2436 track->time_scale = 1.0;
2437 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2438 1000 * 1000 * 1000); /* 64 bit pts in ns */
2440 /* convert the delay from ns to the track timebase */
2441 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2442 (AVRational){ 1, 1000000000 },
2445 st->codecpar->codec_id = codec_id;
2447 if (strcmp(track->language, "und"))
2448 av_dict_set(&st->metadata, "language", track->language, 0);
2449 av_dict_set(&st->metadata, "title", track->name, 0);
2451 if (track->flag_default)
2452 st->disposition |= AV_DISPOSITION_DEFAULT;
2453 if (track->flag_forced)
2454 st->disposition |= AV_DISPOSITION_FORCED;
2456 if (!st->codecpar->extradata) {
2458 st->codecpar->extradata = extradata;
2459 st->codecpar->extradata_size = extradata_size;
2460 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2461 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2462 return AVERROR(ENOMEM);
2463 memcpy(st->codecpar->extradata,
2464 track->codec_priv.data + extradata_offset,
2465 track->codec_priv.size);
2469 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2470 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2471 int display_width_mul = 1;
2472 int display_height_mul = 1;
2474 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2475 st->codecpar->codec_tag = fourcc;
2477 st->codecpar->bits_per_coded_sample = bit_depth;
2478 st->codecpar->width = track->video.pixel_width;
2479 st->codecpar->height = track->video.pixel_height;
2481 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2482 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2483 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2484 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2486 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2487 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2489 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2490 av_reduce(&st->sample_aspect_ratio.num,
2491 &st->sample_aspect_ratio.den,
2492 st->codecpar->height * track->video.display_width * display_width_mul,
2493 st->codecpar->width * track->video.display_height * display_height_mul,
2496 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2497 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2499 if (track->default_duration) {
2500 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2501 1000000000, track->default_duration, 30000);
2502 #if FF_API_R_FRAME_RATE
2503 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2504 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2505 st->r_frame_rate = st->avg_frame_rate;
2509 /* export stereo mode flag as metadata tag */
2510 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2511 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2513 /* export alpha mode flag as metadata tag */
2514 if (track->video.alpha_mode)
2515 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2517 /* if we have virtual track, mark the real tracks */
2518 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2520 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2522 snprintf(buf, sizeof(buf), "%s_%d",
2523 ff_matroska_video_stereo_plane[planes[j].type], i);
2524 for (k=0; k < matroska->tracks.nb_elem; k++)
2525 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2526 av_dict_set(&tracks[k].stream->metadata,
2527 "stereo_mode", buf, 0);
2531 // add stream level stereo3d side data if it is a supported format
2532 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2533 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2534 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2539 ret = mkv_parse_video_color(st, track);
2542 ret = mkv_parse_video_projection(st, track);
2545 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2546 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2547 st->codecpar->codec_tag = fourcc;
2548 st->codecpar->sample_rate = track->audio.out_samplerate;
2549 st->codecpar->channels = track->audio.channels;
2550 if (!st->codecpar->bits_per_coded_sample)
2551 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2552 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2553 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2554 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2555 st->need_parsing = AVSTREAM_PARSE_FULL;
2556 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2557 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2558 if (track->codec_delay > 0) {
2559 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2560 (AVRational){1, 1000000000},
2561 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2562 48000 : st->codecpar->sample_rate});
2564 if (track->seek_preroll > 0) {
2565 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2566 (AVRational){1, 1000000000},
2567 (AVRational){1, st->codecpar->sample_rate});
2569 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2570 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2572 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2573 st->disposition |= AV_DISPOSITION_CAPTIONS;
2574 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2575 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2576 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2577 st->disposition |= AV_DISPOSITION_METADATA;
2579 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2580 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2581 if (st->codecpar->codec_id == AV_CODEC_ID_ASS)
2582 matroska->contains_ssa = 1;
2589 static int matroska_read_header(AVFormatContext *s)
2591 MatroskaDemuxContext *matroska = s->priv_data;
2592 EbmlList *attachments_list = &matroska->attachments;
2593 EbmlList *chapters_list = &matroska->chapters;
2594 MatroskaAttachment *attachments;
2595 MatroskaChapter *chapters;
2596 uint64_t max_start = 0;
2602 matroska->cues_parsing_deferred = 1;
2604 /* First read the EBML header. */
2605 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2606 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2607 ebml_free(ebml_syntax, &ebml);
2608 return AVERROR_INVALIDDATA;
2610 if (ebml.version > EBML_VERSION ||
2611 ebml.max_size > sizeof(uint64_t) ||
2612 ebml.id_length > sizeof(uint32_t) ||
2613 ebml.doctype_version > 3) {
2614 avpriv_report_missing_feature(matroska->ctx,
2615 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2616 ebml.version, ebml.doctype, ebml.doctype_version);
2617 ebml_free(ebml_syntax, &ebml);
2618 return AVERROR_PATCHWELCOME;
2619 } else if (ebml.doctype_version == 3) {
2620 av_log(matroska->ctx, AV_LOG_WARNING,
2621 "EBML header using unsupported features\n"
2622 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2623 ebml.version, ebml.doctype, ebml.doctype_version);
2625 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2626 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2628 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2629 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2630 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2631 ebml_free(ebml_syntax, &ebml);
2632 return AVERROR_INVALIDDATA;
2635 ebml_free(ebml_syntax, &ebml);
2637 /* The next thing is a segment. */
2638 pos = avio_tell(matroska->ctx->pb);
2639 res = ebml_parse(matroska, matroska_segments, matroska);
2640 // try resyncing until we find a EBML_STOP type element.
2642 res = matroska_resync(matroska, pos);
2645 pos = avio_tell(matroska->ctx->pb);
2646 res = ebml_parse(matroska, matroska_segment, matroska);
2648 matroska_execute_seekhead(matroska);
2650 if (!matroska->time_scale)
2651 matroska->time_scale = 1000000;
2652 if (matroska->duration)
2653 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2654 1000 / AV_TIME_BASE;
2655 av_dict_set(&s->metadata, "title", matroska->title, 0);
2656 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2658 if (matroska->date_utc.size == 8)
2659 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2661 res = matroska_parse_tracks(s);
2665 attachments = attachments_list->elem;
2666 for (j = 0; j < attachments_list->nb_elem; j++) {
2667 if (!(attachments[j].filename && attachments[j].mime &&
2668 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2669 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2671 AVStream *st = avformat_new_stream(s, NULL);
2674 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2675 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2676 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2678 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2679 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2680 strlen(ff_mkv_image_mime_tags[i].str))) {
2681 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2686 attachments[j].stream = st;
2688 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2689 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2690 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2692 av_init_packet(&st->attached_pic);
2693 if ((res = av_new_packet(&st->attached_pic, attachments[j].bin.size)) < 0)
2695 memcpy(st->attached_pic.data, attachments[j].bin.data, attachments[j].bin.size);
2696 st->attached_pic.stream_index = st->index;
2697 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
2699 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2700 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2702 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2703 attachments[j].bin.size);
2705 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2706 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2707 strlen(ff_mkv_mime_tags[i].str))) {
2708 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2716 chapters = chapters_list->elem;
2717 for (i = 0; i < chapters_list->nb_elem; i++)
2718 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2719 (max_start == 0 || chapters[i].start > max_start)) {
2720 chapters[i].chapter =
2721 avpriv_new_chapter(s, chapters[i].uid,
2722 (AVRational) { 1, 1000000000 },
2723 chapters[i].start, chapters[i].end,
2725 if (chapters[i].chapter) {
2726 av_dict_set(&chapters[i].chapter->metadata,
2727 "title", chapters[i].title, 0);
2729 max_start = chapters[i].start;
2732 matroska_add_index_entries(matroska);
2734 matroska_convert_tags(s);
2738 matroska_read_close(s);
2743 * Put one packet in an application-supplied AVPacket struct.
2744 * Returns 0 on success or -1 on failure.
2746 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2749 if (matroska->queue) {
2750 MatroskaTrack *tracks = matroska->tracks.elem;
2751 MatroskaTrack *track;
2753 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2754 track = &tracks[pkt->stream_index];
2755 if (track->has_palette) {
2756 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2758 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2760 memcpy(pal, track->palette, AVPALETTE_SIZE);
2762 track->has_palette = 0;
2771 * Free all packets in our internal queue.
2773 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2775 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2778 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2779 int *buf_size, int type,
2780 uint32_t **lace_buf, int *laces)
2782 int res = 0, n, size = *buf_size;
2783 uint8_t *data = *buf;
2784 uint32_t *lace_size;
2788 *lace_buf = av_mallocz(sizeof(int));
2790 return AVERROR(ENOMEM);
2792 *lace_buf[0] = size;
2796 av_assert0(size > 0);
2800 lace_size = av_mallocz(*laces * sizeof(int));
2802 return AVERROR(ENOMEM);
2805 case 0x1: /* Xiph lacing */
2809 for (n = 0; res == 0 && n < *laces - 1; n++) {
2811 if (size <= total) {
2812 res = AVERROR_INVALIDDATA;
2817 lace_size[n] += temp;
2824 if (size <= total) {
2825 res = AVERROR_INVALIDDATA;
2829 lace_size[n] = size - total;
2833 case 0x2: /* fixed-size lacing */
2834 if (size % (*laces)) {
2835 res = AVERROR_INVALIDDATA;
2838 for (n = 0; n < *laces; n++)
2839 lace_size[n] = size / *laces;
2842 case 0x3: /* EBML lacing */
2846 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2847 if (n < 0 || num > INT_MAX) {
2848 av_log(matroska->ctx, AV_LOG_INFO,
2849 "EBML block data error\n");
2850 res = n<0 ? n : AVERROR_INVALIDDATA;
2855 total = lace_size[0] = num;
2856 for (n = 1; res == 0 && n < *laces - 1; n++) {
2859 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2860 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2861 av_log(matroska->ctx, AV_LOG_INFO,
2862 "EBML block data error\n");
2863 res = r<0 ? r : AVERROR_INVALIDDATA;
2868 lace_size[n] = lace_size[n - 1] + snum;
2869 total += lace_size[n];
2871 if (size <= total) {
2872 res = AVERROR_INVALIDDATA;
2875 lace_size[*laces - 1] = size - total;
2881 *lace_buf = lace_size;
2887 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2888 MatroskaTrack *track, AVStream *st,
2889 uint8_t *data, int size, uint64_t timecode,
2892 int a = st->codecpar->block_align;
2893 int sps = track->audio.sub_packet_size;
2894 int cfs = track->audio.coded_framesize;
2895 int h = track->audio.sub_packet_h;
2896 int y = track->audio.sub_packet_cnt;
2897 int w = track->audio.frame_size;
2900 if (!track->audio.pkt_cnt) {
2901 if (track->audio.sub_packet_cnt == 0)
2902 track->audio.buf_timecode = timecode;
2903 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
2904 if (size < cfs * h / 2) {
2905 av_log(matroska->ctx, AV_LOG_ERROR,
2906 "Corrupt int4 RM-style audio packet size\n");
2907 return AVERROR_INVALIDDATA;
2909 for (x = 0; x < h / 2; x++)
2910 memcpy(track->audio.buf + x * 2 * w + y * cfs,
2911 data + x * cfs, cfs);
2912 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
2914 av_log(matroska->ctx, AV_LOG_ERROR,
2915 "Corrupt sipr RM-style audio packet size\n");
2916 return AVERROR_INVALIDDATA;
2918 memcpy(track->audio.buf + y * w, data, w);
2920 if (size < sps * w / sps || h<=0 || w%sps) {
2921 av_log(matroska->ctx, AV_LOG_ERROR,
2922 "Corrupt generic RM-style audio packet size\n");
2923 return AVERROR_INVALIDDATA;
2925 for (x = 0; x < w / sps; x++)
2926 memcpy(track->audio.buf +
2927 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
2928 data + x * sps, sps);
2931 if (++track->audio.sub_packet_cnt >= h) {
2932 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
2933 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
2934 track->audio.sub_packet_cnt = 0;
2935 track->audio.pkt_cnt = h * w / a;
2939 while (track->audio.pkt_cnt) {
2941 AVPacket pktl, *pkt = &pktl;
2943 ret = av_new_packet(pkt, a);
2948 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
2950 pkt->pts = track->audio.buf_timecode;
2951 track->audio.buf_timecode = AV_NOPTS_VALUE;
2953 pkt->stream_index = st->index;
2954 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
2956 av_packet_unref(pkt);
2957 return AVERROR(ENOMEM);
2964 /* reconstruct full wavpack blocks from mangled matroska ones */
2965 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
2966 uint8_t **pdst, int *size)
2968 uint8_t *dst = NULL;
2973 int ret, offset = 0;
2975 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
2976 return AVERROR_INVALIDDATA;
2978 ver = AV_RL16(track->stream->codecpar->extradata);
2980 samples = AV_RL32(src);
2984 while (srclen >= 8) {
2989 uint32_t flags = AV_RL32(src);
2990 uint32_t crc = AV_RL32(src + 4);
2994 multiblock = (flags & 0x1800) != 0x1800;
2997 ret = AVERROR_INVALIDDATA;
3000 blocksize = AV_RL32(src);
3006 if (blocksize > srclen) {
3007 ret = AVERROR_INVALIDDATA;
3011 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3013 ret = AVERROR(ENOMEM);
3017 dstlen += blocksize + 32;
3019 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3020 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3021 AV_WL16(dst + offset + 8, ver); // version
3022 AV_WL16(dst + offset + 10, 0); // track/index_no
3023 AV_WL32(dst + offset + 12, 0); // total samples
3024 AV_WL32(dst + offset + 16, 0); // block index
3025 AV_WL32(dst + offset + 20, samples); // number of samples
3026 AV_WL32(dst + offset + 24, flags); // flags
3027 AV_WL32(dst + offset + 28, crc); // crc
3028 memcpy(dst + offset + 32, src, blocksize); // block data
3031 srclen -= blocksize;
3032 offset += blocksize + 32;
3035 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3047 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3048 uint8_t **pdst, int *size)
3053 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3054 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3056 return AVERROR(ENOMEM);
3058 AV_WB32(dst, dstlen);
3059 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3060 memcpy(dst + 8, src, dstlen);
3061 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3071 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3072 MatroskaTrack *track,
3074 uint8_t *data, int data_len,
3079 AVPacket pktl, *pkt = &pktl;
3080 uint8_t *id, *settings, *text, *buf;
3081 int id_len, settings_len, text_len;
3086 return AVERROR_INVALIDDATA;
3089 q = data + data_len;
3094 if (*p == '\r' || *p == '\n') {
3103 if (p >= q || *p != '\n')
3104 return AVERROR_INVALIDDATA;
3110 if (*p == '\r' || *p == '\n') {
3111 settings_len = p - settings;
3119 if (p >= q || *p != '\n')
3120 return AVERROR_INVALIDDATA;
3125 while (text_len > 0) {
3126 const int len = text_len - 1;
3127 const uint8_t c = p[len];
3128 if (c != '\r' && c != '\n')
3134 return AVERROR_INVALIDDATA;
3136 err = av_new_packet(pkt, text_len);
3141 memcpy(pkt->data, text, text_len);
3144 buf = av_packet_new_side_data(pkt,
3145 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3148 av_packet_unref(pkt);
3149 return AVERROR(ENOMEM);
3151 memcpy(buf, id, id_len);
3154 if (settings_len > 0) {
3155 buf = av_packet_new_side_data(pkt,
3156 AV_PKT_DATA_WEBVTT_SETTINGS,
3159 av_packet_unref(pkt);
3160 return AVERROR(ENOMEM);
3162 memcpy(buf, settings, settings_len);
3165 // Do we need this for subtitles?
3166 // pkt->flags = AV_PKT_FLAG_KEY;
3168 pkt->stream_index = st->index;
3169 pkt->pts = timecode;
3171 // Do we need this for subtitles?
3172 // pkt->dts = timecode;
3174 pkt->duration = duration;
3177 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3179 av_packet_unref(pkt);
3180 return AVERROR(ENOMEM);
3186 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3187 MatroskaTrack *track, AVStream *st,
3188 AVBufferRef *buf, uint8_t *data, int pkt_size,
3189 uint64_t timecode, uint64_t lace_duration,
3190 int64_t pos, int is_keyframe,
3191 uint8_t *additional, uint64_t additional_id, int additional_size,
3192 int64_t discard_padding)
3194 MatroskaTrackEncoding *encodings = track->encodings.elem;
3195 uint8_t *pkt_data = data;
3197 AVPacket pktl, *pkt = &pktl;
3199 if (encodings && !encodings->type && encodings->scope & 1) {
3200 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3205 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3207 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3209 av_log(matroska->ctx, AV_LOG_ERROR,
3210 "Error parsing a wavpack block.\n");
3213 if (pkt_data != data)
3214 av_freep(&pkt_data);
3218 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3220 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3222 av_log(matroska->ctx, AV_LOG_ERROR,
3223 "Error parsing a prores block.\n");
3226 if (pkt_data != data)
3227 av_freep(&pkt_data);
3231 av_init_packet(pkt);
3232 if (pkt_data != data)
3233 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3236 pkt->buf = av_buffer_ref(buf);
3239 res = AVERROR(ENOMEM);
3243 pkt->data = pkt_data;
3244 pkt->size = pkt_size;
3245 pkt->flags = is_keyframe;
3246 pkt->stream_index = st->index;
3248 if (additional_size > 0) {
3249 uint8_t *side_data = av_packet_new_side_data(pkt,
3250 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3251 additional_size + 8);
3253 av_packet_unref(pkt);
3254 return AVERROR(ENOMEM);
3256 AV_WB64(side_data, additional_id);
3257 memcpy(side_data + 8, additional, additional_size);
3260 if (discard_padding) {
3261 uint8_t *side_data = av_packet_new_side_data(pkt,
3262 AV_PKT_DATA_SKIP_SAMPLES,
3265 av_packet_unref(pkt);
3266 return AVERROR(ENOMEM);
3268 discard_padding = av_rescale_q(discard_padding,
3269 (AVRational){1, 1000000000},
3270 (AVRational){1, st->codecpar->sample_rate});
3271 if (discard_padding > 0) {
3272 AV_WL32(side_data + 4, discard_padding);
3274 AV_WL32(side_data, -discard_padding);
3278 if (track->ms_compat)
3279 pkt->dts = timecode;
3281 pkt->pts = timecode;
3283 pkt->duration = lace_duration;
3285 #if FF_API_CONVERGENCE_DURATION
3286 FF_DISABLE_DEPRECATION_WARNINGS
3287 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3288 pkt->convergence_duration = lace_duration;
3290 FF_ENABLE_DEPRECATION_WARNINGS
3293 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3295 av_packet_unref(pkt);
3296 return AVERROR(ENOMEM);
3302 if (pkt_data != data)
3303 av_freep(&pkt_data);
3307 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3308 int size, int64_t pos, uint64_t cluster_time,
3309 uint64_t block_duration, int is_keyframe,
3310 uint8_t *additional, uint64_t additional_id, int additional_size,
3311 int64_t cluster_pos, int64_t discard_padding)
3313 uint64_t timecode = AV_NOPTS_VALUE;
3314 MatroskaTrack *track;
3318 uint32_t *lace_size = NULL;
3319 int n, flags, laces = 0;
3321 int trust_default_duration = 1;
3323 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3324 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
3330 track = matroska_find_track_by_num(matroska, num);
3331 if (!track || !track->stream) {
3332 av_log(matroska->ctx, AV_LOG_INFO,
3333 "Invalid stream %"PRIu64" or size %u\n", num, size);
3334 return AVERROR_INVALIDDATA;
3335 } else if (size <= 3)
3338 if (st->discard >= AVDISCARD_ALL)
3340 av_assert1(block_duration != AV_NOPTS_VALUE);
3342 block_time = sign_extend(AV_RB16(data), 16);
3346 if (is_keyframe == -1)
3347 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3349 if (cluster_time != (uint64_t) -1 &&
3350 (block_time >= 0 || cluster_time >= -block_time)) {
3351 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3352 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3353 timecode < track->end_timecode)
3354 is_keyframe = 0; /* overlapping subtitles are not key frame */
3356 ff_reduce_index(matroska->ctx, st->index);
3357 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3362 if (matroska->skip_to_keyframe &&
3363 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3364 // Compare signed timecodes. Timecode may be negative due to codec delay
3365 // offset. We don't support timestamps greater than int64_t anyway - see
3367 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3370 matroska->skip_to_keyframe = 0;
3371 else if (!st->skip_to_keyframe) {
3372 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3373 matroska->skip_to_keyframe = 0;
3377 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3378 &lace_size, &laces);
3383 if (track->audio.samplerate == 8000) {
3384 // If this is needed for more codecs, then add them here
3385 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3386 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3387 trust_default_duration = 0;
3391 if (!block_duration && trust_default_duration)
3392 block_duration = track->default_duration * laces / matroska->time_scale;
3394 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3395 track->end_timecode =
3396 FFMAX(track->end_timecode, timecode + block_duration);
3398 for (n = 0; n < laces; n++) {
3399 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3401 if (lace_size[n] > size) {
3402 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3406 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3407 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3408 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3409 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3410 st->codecpar->block_align && track->audio.sub_packet_size) {
3411 res = matroska_parse_rm_audio(matroska, track, st, data,
3417 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3418 res = matroska_parse_webvtt(matroska, track, st,
3420 timecode, lace_duration,
3425 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3426 timecode, lace_duration, pos,
3427 !n ? is_keyframe : 0,
3428 additional, additional_id, additional_size,
3434 if (timecode != AV_NOPTS_VALUE)
3435 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3436 data += lace_size[n];
3437 size -= lace_size[n];
3445 static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
3447 EbmlList *blocks_list;
3448 MatroskaBlock *blocks;
3450 res = ebml_parse(matroska,
3451 matroska_cluster_incremental_parsing,
3452 &matroska->current_cluster);
3455 if (matroska->current_cluster_pos)
3456 ebml_level_end(matroska);
3457 ebml_free(matroska_cluster, &matroska->current_cluster);
3458 memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
3459 matroska->current_cluster_num_blocks = 0;
3460 matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
3461 /* sizeof the ID which was already read */
3462 if (matroska->current_id)
3463 matroska->current_cluster_pos -= 4;
3464 res = ebml_parse(matroska,
3465 matroska_clusters_incremental,
3466 &matroska->current_cluster);
3467 /* Try parsing the block again. */
3469 res = ebml_parse(matroska,
3470 matroska_cluster_incremental_parsing,
3471 &matroska->current_cluster);
3475 matroska->current_cluster_num_blocks <
3476 matroska->current_cluster.blocks.nb_elem) {
3477 blocks_list = &matroska->current_cluster.blocks;
3478 blocks = blocks_list->elem;
3480 matroska->current_cluster_num_blocks = blocks_list->nb_elem;
3481 i = blocks_list->nb_elem - 1;
3482 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3483 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3484 uint8_t* additional = blocks[i].additional.size > 0 ?
3485 blocks[i].additional.data : NULL;
3486 if (!blocks[i].non_simple)
3487 blocks[i].duration = 0;
3488 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3489 blocks[i].bin.size, blocks[i].bin.pos,
3490 matroska->current_cluster.timecode,
3491 blocks[i].duration, is_keyframe,
3492 additional, blocks[i].additional_id,
3493 blocks[i].additional.size,
3494 matroska->current_cluster_pos,
3495 blocks[i].discard_padding);
3502 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3504 MatroskaCluster cluster = { 0 };
3505 EbmlList *blocks_list;
3506 MatroskaBlock *blocks;
3510 if (!matroska->contains_ssa)
3511 return matroska_parse_cluster_incremental(matroska);
3512 pos = avio_tell(matroska->ctx->pb);
3513 if (matroska->current_id)
3514 pos -= 4; /* sizeof the ID which was already read */
3515 res = ebml_parse(matroska, matroska_clusters, &cluster);
3516 blocks_list = &cluster.blocks;
3517 blocks = blocks_list->elem;
3518 for (i = 0; i < blocks_list->nb_elem; i++)
3519 if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
3520 int is_keyframe = blocks[i].non_simple ? blocks[i].reference == INT64_MIN : -1;
3521 res = matroska_parse_block(matroska, blocks[i].bin.buf, blocks[i].bin.data,
3522 blocks[i].bin.size, blocks[i].bin.pos,
3523 cluster.timecode, blocks[i].duration,
3524 is_keyframe, NULL, 0, 0, pos,
3525 blocks[i].discard_padding);
3527 ebml_free(matroska_cluster, &cluster);
3531 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3533 MatroskaDemuxContext *matroska = s->priv_data;
3536 while (matroska_deliver_packet(matroska, pkt)) {
3537 int64_t pos = avio_tell(matroska->ctx->pb);
3539 return (ret < 0) ? ret : AVERROR_EOF;
3540 if (matroska_parse_cluster(matroska) < 0)
3541 ret = matroska_resync(matroska, pos);
3547 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3548 int64_t timestamp, int flags)
3550 MatroskaDemuxContext *matroska = s->priv_data;
3551 MatroskaTrack *tracks = NULL;
3552 AVStream *st = s->streams[stream_index];
3553 int i, index, index_min;
3555 /* Parse the CUES now since we need the index data to seek. */
3556 if (matroska->cues_parsing_deferred > 0) {
3557 matroska->cues_parsing_deferred = 0;
3558 matroska_parse_cues(matroska);
3561 if (!st->nb_index_entries)
3563 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3565 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3566 avio_seek(s->pb, st->index_entries[st->nb_index_entries - 1].pos,
3568 matroska->current_id = 0;
3569 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3570 matroska_clear_queue(matroska);
3571 if (matroska_parse_cluster(matroska) < 0)
3576 matroska_clear_queue(matroska);
3577 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3581 tracks = matroska->tracks.elem;
3582 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3583 tracks[i].audio.pkt_cnt = 0;
3584 tracks[i].audio.sub_packet_cnt = 0;
3585 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3586 tracks[i].end_timecode = 0;
3589 avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
3590 matroska->current_id = 0;
3591 if (flags & AVSEEK_FLAG_ANY) {
3592 st->skip_to_keyframe = 0;
3593 matroska->skip_to_timecode = timestamp;
3595 st->skip_to_keyframe = 1;
3596 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3598 matroska->skip_to_keyframe = 1;
3600 matroska->num_levels = 0;
3601 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3604 // slightly hackish but allows proper fallback to
3605 // the generic seeking code.
3606 matroska_clear_queue(matroska);
3607 matroska->current_id = 0;
3608 st->skip_to_keyframe =
3609 matroska->skip_to_keyframe = 0;
3611 matroska->num_levels = 0;
3615 static int matroska_read_close(AVFormatContext *s)
3617 MatroskaDemuxContext *matroska = s->priv_data;
3618 MatroskaTrack *tracks = matroska->tracks.elem;
3621 matroska_clear_queue(matroska);
3623 for (n = 0; n < matroska->tracks.nb_elem; n++)
3624 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3625 av_freep(&tracks[n].audio.buf);
3626 ebml_free(matroska_cluster, &matroska->current_cluster);
3627 ebml_free(matroska_segment, matroska);
3633 int64_t start_time_ns;
3634 int64_t end_time_ns;
3635 int64_t start_offset;
3639 /* This function searches all the Cues and returns the CueDesc corresponding to
3640 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3641 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3643 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3644 MatroskaDemuxContext *matroska = s->priv_data;
3647 int nb_index_entries = s->streams[0]->nb_index_entries;
3648 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3649 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3650 for (i = 1; i < nb_index_entries; i++) {
3651 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3652 index_entries[i].timestamp * matroska->time_scale > ts) {
3657 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3658 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3659 if (i != nb_index_entries - 1) {
3660 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3661 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3663 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3664 // FIXME: this needs special handling for files where Cues appear
3665 // before Clusters. the current logic assumes Cues appear after
3667 cue_desc.end_offset = cues_start - matroska->segment_start;
3672 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3674 MatroskaDemuxContext *matroska = s->priv_data;
3675 int64_t cluster_pos, before_pos;
3677 if (s->streams[0]->nb_index_entries <= 0) return 0;
3678 // seek to the first cluster using cues.
3679 index = av_index_search_timestamp(s->streams[0], 0, 0);
3680 if (index < 0) return 0;
3681 cluster_pos = s->streams[0]->index_entries[index].pos;
3682 before_pos = avio_tell(s->pb);
3684 int64_t cluster_id = 0, cluster_length = 0;
3686 avio_seek(s->pb, cluster_pos, SEEK_SET);
3687 // read cluster id and length
3688 ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id);
3689 ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3690 if (cluster_id != 0xF43B675) { // done with all clusters
3693 avio_seek(s->pb, cluster_pos, SEEK_SET);
3694 matroska->current_id = 0;
3695 matroska_clear_queue(matroska);
3696 if (matroska_parse_cluster(matroska) < 0 ||
3700 pkt = &matroska->queue->pkt;
3701 cluster_pos += cluster_length + 12; // 12 is the offset of the cluster id and length.
3702 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3707 avio_seek(s->pb, before_pos, SEEK_SET);
3711 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3712 double min_buffer, double* buffer,
3713 double* sec_to_download, AVFormatContext *s,
3716 double nano_seconds_per_second = 1000000000.0;
3717 double time_sec = time_ns / nano_seconds_per_second;
3719 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3720 int64_t end_time_ns = time_ns + time_to_search_ns;
3721 double sec_downloaded = 0.0;
3722 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3723 if (desc_curr.start_time_ns == -1)
3725 *sec_to_download = 0.0;
3727 // Check for non cue start time.
3728 if (time_ns > desc_curr.start_time_ns) {
3729 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3730 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3731 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3732 double timeToDownload = (cueBytes * 8.0) / bps;
3734 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3735 *sec_to_download += timeToDownload;
3737 // Check if the search ends within the first cue.
3738 if (desc_curr.end_time_ns >= end_time_ns) {
3739 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3740 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3741 sec_downloaded = percent_to_sub * sec_downloaded;
3742 *sec_to_download = percent_to_sub * *sec_to_download;
3745 if ((sec_downloaded + *buffer) <= min_buffer) {
3749 // Get the next Cue.
3750 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3753 while (desc_curr.start_time_ns != -1) {
3754 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3755 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3756 double desc_sec = desc_ns / nano_seconds_per_second;
3757 double bits = (desc_bytes * 8.0);
3758 double time_to_download = bits / bps;
3760 sec_downloaded += desc_sec - time_to_download;
3761 *sec_to_download += time_to_download;
3763 if (desc_curr.end_time_ns >= end_time_ns) {
3764 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3765 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3766 sec_downloaded = percent_to_sub * sec_downloaded;
3767 *sec_to_download = percent_to_sub * *sec_to_download;
3769 if ((sec_downloaded + *buffer) <= min_buffer)
3774 if ((sec_downloaded + *buffer) <= min_buffer) {
3779 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3781 *buffer = *buffer + sec_downloaded;
3785 /* This function computes the bandwidth of the WebM file with the help of
3786 * buffer_size_after_time_downloaded() function. Both of these functions are
3787 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3788 * Matroska parsing mechanism.
3790 * Returns the bandwidth of the file on success; -1 on error.
3792 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3794 MatroskaDemuxContext *matroska = s->priv_data;
3795 AVStream *st = s->streams[0];
3796 double bandwidth = 0.0;
3799 for (i = 0; i < st->nb_index_entries; i++) {
3800 int64_t prebuffer_ns = 1000000000;
3801 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3802 double nano_seconds_per_second = 1000000000.0;
3803 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3804 double prebuffer_bytes = 0.0;
3805 int64_t temp_prebuffer_ns = prebuffer_ns;
3806 int64_t pre_bytes, pre_ns;
3807 double pre_sec, prebuffer, bits_per_second;
3808 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3810 // Start with the first Cue.
3811 CueDesc desc_end = desc_beg;
3813 // Figure out how much data we have downloaded for the prebuffer. This will
3814 // be used later to adjust the bits per sample to try.
3815 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3816 // Prebuffered the entire Cue.
3817 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3818 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3819 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3821 if (desc_end.start_time_ns == -1) {
3822 // The prebuffer is larger than the duration.
3823 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3825 bits_per_second = 0.0;
3827 // The prebuffer ends in the last Cue. Estimate how much data was
3829 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3830 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3831 pre_sec = pre_ns / nano_seconds_per_second;
3833 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3835 prebuffer = prebuffer_ns / nano_seconds_per_second;
3837 // Set this to 0.0 in case our prebuffer buffers the entire video.
3838 bits_per_second = 0.0;
3840 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3841 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3842 double desc_sec = desc_ns / nano_seconds_per_second;
3843 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3845 // Drop the bps by the percentage of bytes buffered.
3846 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3847 double mod_bits_per_second = calc_bits_per_second * percent;
3849 if (prebuffer < desc_sec) {
3851 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3853 // Add 1 so the bits per second should be a little bit greater than file
3855 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3856 const double min_buffer = 0.0;
3857 double buffer = prebuffer;
3858 double sec_to_download = 0.0;
3860 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3861 min_buffer, &buffer, &sec_to_download,
3865 } else if (rv == 0) {
3866 bits_per_second = (double)(bps);
3871 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3872 } while (desc_end.start_time_ns != -1);
3874 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3876 return (int64_t)bandwidth;
3879 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3881 MatroskaDemuxContext *matroska = s->priv_data;
3882 EbmlList *seekhead_list = &matroska->seekhead;
3883 MatroskaSeekhead *seekhead = seekhead_list->elem;
3885 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3889 // determine cues start and end positions
3890 for (i = 0; i < seekhead_list->nb_elem; i++)
3891 if (seekhead[i].id == MATROSKA_ID_CUES)
3894 if (i >= seekhead_list->nb_elem) return -1;
3896 before_pos = avio_tell(matroska->ctx->pb);
3897 cues_start = seekhead[i].pos + matroska->segment_start;
3898 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3899 // cues_end is computed as cues_start + cues_length + length of the
3900 // Cues element ID + EBML length of the Cues element. cues_end is
3901 // inclusive and the above sum is reduced by 1.
3902 uint64_t cues_length = 0, cues_id = 0, bytes_read = 0;
3903 bytes_read += ebml_read_num(matroska, matroska->ctx->pb, 4, &cues_id);
3904 bytes_read += ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3905 cues_end = cues_start + cues_length + bytes_read - 1;
3907 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3908 if (cues_start == -1 || cues_end == -1) return -1;
3911 matroska_parse_cues(matroska);
3914 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3917 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3919 // if the file has cues at the start, fix up the init range so tht
3920 // it does not include it
3921 if (cues_start <= init_range)
3922 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3925 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3926 if (bandwidth < 0) return -1;
3927 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
3929 // check if all clusters start with key frames
3930 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
3932 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3933 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3934 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
3935 if (!buf) return -1;
3937 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
3938 int ret = snprintf(buf + end, 20,
3939 "%" PRId64, s->streams[0]->index_entries[i].timestamp);
3940 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
3941 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
3943 return AVERROR_INVALIDDATA;
3946 if (i != s->streams[0]->nb_index_entries - 1) {
3947 strncat(buf, ",", 1);
3951 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
3957 static int webm_dash_manifest_read_header(AVFormatContext *s)
3960 int ret = matroska_read_header(s);
3962 MatroskaTrack *tracks;
3963 MatroskaDemuxContext *matroska = s->priv_data;
3965 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
3968 if (!s->nb_streams) {
3969 matroska_read_close(s);
3970 av_log(s, AV_LOG_ERROR, "No streams found\n");
3971 return AVERROR_INVALIDDATA;
3974 if (!matroska->is_live) {
3975 buf = av_asprintf("%g", matroska->duration);
3976 if (!buf) return AVERROR(ENOMEM);
3977 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
3980 // initialization range
3981 // 5 is the offset of Cluster ID.
3982 init_range = avio_tell(s->pb) - 5;
3983 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
3986 // basename of the file
3987 buf = strrchr(s->url, '/');
3988 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
3991 tracks = matroska->tracks.elem;
3992 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
3994 // parse the cues and populate Cue related fields
3995 if (!matroska->is_live) {
3996 ret = webm_dash_manifest_cues(s, init_range);
3998 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4003 // use the bandwidth from the command line if it was provided
4004 if (matroska->bandwidth > 0) {
4005 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4006 matroska->bandwidth, 0);
4011 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4016 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4017 static const AVOption options[] = {
4018 { "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 },
4019 { "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 },
4023 static const AVClass webm_dash_class = {
4024 .class_name = "WebM DASH Manifest demuxer",
4025 .item_name = av_default_item_name,
4027 .version = LIBAVUTIL_VERSION_INT,
4030 AVInputFormat ff_matroska_demuxer = {
4031 .name = "matroska,webm",
4032 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4033 .extensions = "mkv,mk3d,mka,mks",
4034 .priv_data_size = sizeof(MatroskaDemuxContext),
4035 .read_probe = matroska_probe,
4036 .read_header = matroska_read_header,
4037 .read_packet = matroska_read_packet,
4038 .read_close = matroska_read_close,
4039 .read_seek = matroska_read_seek,
4040 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4043 AVInputFormat ff_webm_dash_manifest_demuxer = {
4044 .name = "webm_dash_manifest",
4045 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4046 .priv_data_size = sizeof(MatroskaDemuxContext),
4047 .read_header = webm_dash_manifest_read_header,
4048 .read_packet = webm_dash_manifest_read_packet,
4049 .read_close = matroska_read_close,
4050 .priv_class = &webm_dash_class,