2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
89 typedef const struct EbmlSyntax {
99 const struct EbmlSyntax *n;
103 typedef struct EbmlList {
108 typedef struct EbmlBin {
115 typedef struct Ebml {
120 uint64_t doctype_version;
123 typedef struct MatroskaTrackCompression {
126 } MatroskaTrackCompression;
128 typedef struct MatroskaTrackEncryption {
131 } MatroskaTrackEncryption;
133 typedef struct MatroskaTrackEncoding {
136 MatroskaTrackCompression compression;
137 MatroskaTrackEncryption encryption;
138 } MatroskaTrackEncoding;
140 typedef struct MatroskaMasteringMeta {
149 double max_luminance;
150 double min_luminance;
151 } MatroskaMasteringMeta;
153 typedef struct MatroskaTrackVideoColor {
154 uint64_t matrix_coefficients;
155 uint64_t bits_per_channel;
156 uint64_t chroma_sub_horz;
157 uint64_t chroma_sub_vert;
158 uint64_t cb_sub_horz;
159 uint64_t cb_sub_vert;
160 uint64_t chroma_siting_horz;
161 uint64_t chroma_siting_vert;
163 uint64_t transfer_characteristics;
167 MatroskaMasteringMeta mastering_meta;
168 } MatroskaTrackVideoColor;
170 typedef struct MatroskaTrackVideoProjection {
176 } MatroskaTrackVideoProjection;
178 typedef struct MatroskaTrackVideo {
180 uint64_t display_width;
181 uint64_t display_height;
182 uint64_t pixel_width;
183 uint64_t pixel_height;
185 uint64_t display_unit;
187 uint64_t field_order;
188 uint64_t stereo_mode;
191 MatroskaTrackVideoProjection projection;
192 } MatroskaTrackVideo;
194 typedef struct MatroskaTrackAudio {
196 double out_samplerate;
200 /* real audio header (extracted from extradata) */
207 uint64_t buf_timecode;
209 } MatroskaTrackAudio;
211 typedef struct MatroskaTrackPlane {
214 } MatroskaTrackPlane;
216 typedef struct MatroskaTrackOperation {
217 EbmlList combine_planes;
218 } MatroskaTrackOperation;
220 typedef struct MatroskaTrack {
229 uint64_t default_duration;
230 uint64_t flag_default;
231 uint64_t flag_forced;
232 uint64_t seek_preroll;
233 MatroskaTrackVideo video;
234 MatroskaTrackAudio audio;
235 MatroskaTrackOperation operation;
237 uint64_t codec_delay;
238 uint64_t codec_delay_in_track_tb;
241 int64_t end_timecode;
243 uint64_t max_block_additional_id;
245 uint32_t palette[AVPALETTE_COUNT];
249 typedef struct MatroskaAttachment {
256 } MatroskaAttachment;
258 typedef struct MatroskaChapter {
267 typedef struct MatroskaIndexPos {
272 typedef struct MatroskaIndex {
277 typedef struct MatroskaTag {
285 typedef struct MatroskaTagTarget {
293 typedef struct MatroskaTags {
294 MatroskaTagTarget target;
298 typedef struct MatroskaSeekhead {
303 typedef struct MatroskaLevel {
308 typedef struct MatroskaBlock {
313 uint64_t additional_id;
315 int64_t discard_padding;
318 typedef struct MatroskaCluster {
324 typedef struct MatroskaLevel1Element {
328 } MatroskaLevel1Element;
330 typedef struct MatroskaDemuxContext {
331 const AVClass *class;
332 AVFormatContext *ctx;
336 MatroskaLevel levels[EBML_MAX_DEPTH];
346 EbmlList attachments;
352 /* byte position of the segment inside the stream */
353 int64_t segment_start;
355 /* the packet queue */
357 AVPacketList *queue_end;
361 /* What to skip before effectively reading a packet. */
362 int skip_to_keyframe;
363 uint64_t skip_to_timecode;
365 /* File has a CUES element, but we defer parsing until it is needed. */
366 int cues_parsing_deferred;
368 /* Level1 elements and whether they were read yet */
369 MatroskaLevel1Element level1_elems[64];
370 int num_level1_elems;
372 MatroskaCluster current_cluster;
374 /* WebM DASH Manifest live flag */
377 /* Bandwidth value for WebM DASH Manifest */
379 } MatroskaDemuxContext;
381 #define CHILD_OF(parent) { .def = { .n = parent } }
383 static const EbmlSyntax ebml_syntax[], matroska_segment[], matroska_track_video_color[], matroska_track_video[],
384 matroska_track[], matroska_track_encoding[], matroska_track_encodings[],
385 matroska_track_combine_planes[], matroska_track_operation[], matroska_tracks[],
386 matroska_attachments[], matroska_chapter_entry[], matroska_chapter[], matroska_chapters[],
387 matroska_index_entry[], matroska_index[], matroska_tag[], matroska_tags[], matroska_seekhead[],
388 matroska_blockadditions[], matroska_blockgroup[], matroska_cluster_parsing[];
390 static const EbmlSyntax ebml_header[] = {
391 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
392 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
393 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
394 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
395 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
396 { EBML_ID_EBMLVERSION, EBML_NONE },
397 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
398 CHILD_OF(ebml_syntax)
401 static const EbmlSyntax ebml_syntax[] = {
402 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
403 { MATROSKA_ID_SEGMENT, EBML_STOP },
407 static const EbmlSyntax matroska_info[] = {
408 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
409 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
410 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
411 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
412 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
413 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
414 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
415 CHILD_OF(matroska_segment)
418 static const EbmlSyntax matroska_mastering_meta[] = {
419 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
420 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
421 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
422 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
423 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
424 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
425 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
426 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
427 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
428 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
429 CHILD_OF(matroska_track_video_color)
432 static const EbmlSyntax matroska_track_video_color[] = {
433 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
434 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
435 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
436 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
437 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
438 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
439 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
440 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
441 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
442 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
443 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
444 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
445 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
446 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
447 CHILD_OF(matroska_track_video)
450 static const EbmlSyntax matroska_track_video_projection[] = {
451 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
452 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
453 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
454 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
455 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
456 CHILD_OF(matroska_track_video)
459 static const EbmlSyntax matroska_track_video[] = {
460 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
461 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
462 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
463 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
464 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
465 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
466 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
467 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
468 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
469 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
470 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
471 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
472 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
473 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
474 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
475 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
476 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
477 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
478 CHILD_OF(matroska_track)
481 static const EbmlSyntax matroska_track_audio[] = {
482 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
483 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
484 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
485 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
486 CHILD_OF(matroska_track)
489 static const EbmlSyntax matroska_track_encoding_compression[] = {
490 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
491 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
492 CHILD_OF(matroska_track_encoding)
495 static const EbmlSyntax matroska_track_encoding_encryption[] = {
496 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
497 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
498 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
499 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
500 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
501 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
502 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
503 CHILD_OF(matroska_track_encoding)
505 static const EbmlSyntax matroska_track_encoding[] = {
506 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
507 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
508 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
509 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
510 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
511 CHILD_OF(matroska_track_encodings)
514 static const EbmlSyntax matroska_track_encodings[] = {
515 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
516 CHILD_OF(matroska_track)
519 static const EbmlSyntax matroska_track_plane[] = {
520 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
521 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
522 CHILD_OF(matroska_track_combine_planes)
525 static const EbmlSyntax matroska_track_combine_planes[] = {
526 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
527 CHILD_OF(matroska_track_operation)
530 static const EbmlSyntax matroska_track_operation[] = {
531 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
532 CHILD_OF(matroska_track)
535 static const EbmlSyntax matroska_track[] = {
536 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
537 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
538 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
539 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
540 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
541 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
542 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
543 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
544 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
545 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
546 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
547 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
548 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
549 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
550 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
551 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
552 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
553 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
554 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
555 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
556 { MATROSKA_ID_CODECNAME, EBML_NONE },
557 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
558 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
559 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
560 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
561 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
562 CHILD_OF(matroska_tracks)
565 static const EbmlSyntax matroska_tracks[] = {
566 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
567 CHILD_OF(matroska_segment)
570 static const EbmlSyntax matroska_attachment[] = {
571 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
572 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
573 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
574 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
575 { MATROSKA_ID_FILEDESC, EBML_NONE },
576 CHILD_OF(matroska_attachments)
579 static const EbmlSyntax matroska_attachments[] = {
580 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
581 CHILD_OF(matroska_segment)
584 static const EbmlSyntax matroska_chapter_display[] = {
585 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
586 { MATROSKA_ID_CHAPLANG, EBML_NONE },
587 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
588 CHILD_OF(matroska_chapter_entry)
591 static const EbmlSyntax matroska_chapter_entry[] = {
592 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
593 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
594 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
595 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
596 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
597 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
598 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
599 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
600 CHILD_OF(matroska_chapter)
603 static const EbmlSyntax matroska_chapter[] = {
604 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
605 { MATROSKA_ID_EDITIONUID, EBML_NONE },
606 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
607 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
608 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
609 CHILD_OF(matroska_chapters)
612 static const EbmlSyntax matroska_chapters[] = {
613 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
614 CHILD_OF(matroska_segment)
617 static const EbmlSyntax matroska_index_pos[] = {
618 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
619 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
620 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
621 { MATROSKA_ID_CUEDURATION, EBML_NONE },
622 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
623 CHILD_OF(matroska_index_entry)
626 static const EbmlSyntax matroska_index_entry[] = {
627 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
628 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
629 CHILD_OF(matroska_index)
632 static const EbmlSyntax matroska_index[] = {
633 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
634 CHILD_OF(matroska_segment)
637 static const EbmlSyntax matroska_simpletag[] = {
638 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
639 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
640 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
641 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
642 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
643 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
644 CHILD_OF(matroska_tag)
647 static const EbmlSyntax matroska_tagtargets[] = {
648 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
649 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
650 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
651 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
652 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
653 CHILD_OF(matroska_tag)
656 static const EbmlSyntax matroska_tag[] = {
657 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
658 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
659 CHILD_OF(matroska_tags)
662 static const EbmlSyntax matroska_tags[] = {
663 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
664 CHILD_OF(matroska_segment)
667 static const EbmlSyntax matroska_seekhead_entry[] = {
668 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
669 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
670 CHILD_OF(matroska_seekhead)
673 static const EbmlSyntax matroska_seekhead[] = {
674 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
675 CHILD_OF(matroska_segment)
678 static const EbmlSyntax matroska_segment[] = {
679 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
680 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
681 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
682 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
683 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
684 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
685 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
686 { MATROSKA_ID_CLUSTER, EBML_STOP },
687 { 0 } /* We don't want to go back to level 0, so don't add the parent. */
690 static const EbmlSyntax matroska_segments[] = {
691 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
695 static const EbmlSyntax matroska_blockmore[] = {
696 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
697 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
698 CHILD_OF(matroska_blockadditions)
701 static const EbmlSyntax matroska_blockadditions[] = {
702 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
703 CHILD_OF(matroska_blockgroup)
706 static const EbmlSyntax matroska_blockgroup[] = {
707 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
708 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
709 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
710 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
711 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
712 { MATROSKA_ID_CODECSTATE, EBML_NONE },
713 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
714 CHILD_OF(matroska_cluster_parsing)
717 static const EbmlSyntax matroska_cluster_parsing[] = {
718 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
719 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
720 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
721 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
722 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
723 { MATROSKA_ID_INFO, EBML_NONE },
724 { MATROSKA_ID_CUES, EBML_NONE },
725 { MATROSKA_ID_TAGS, EBML_NONE },
726 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
727 { MATROSKA_ID_CLUSTER, EBML_STOP },
728 { 0 } /* We don't want to go back to level 0, so don't add the parent. */
731 static const EbmlSyntax matroska_cluster[] = {
732 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
733 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
734 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
735 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
736 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
737 CHILD_OF(matroska_segment)
740 static const EbmlSyntax matroska_clusters[] = {
741 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = matroska_cluster } },
742 { MATROSKA_ID_INFO, EBML_NONE },
743 { MATROSKA_ID_CUES, EBML_NONE },
744 { MATROSKA_ID_TAGS, EBML_NONE },
745 { MATROSKA_ID_SEEKHEAD, EBML_NONE },
746 { 0 } /* We don't want to go back to level 0, so don't add the parent. */
750 static const char *const matroska_doctypes[] = { "matroska", "webm" };
752 static int matroska_read_close(AVFormatContext *s);
755 * This function prepares the status for parsing of level 1 elements.
757 static int matroska_reset_status(MatroskaDemuxContext *matroska,
758 uint32_t id, int64_t position)
761 int err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
766 matroska->current_id = id;
767 matroska->num_levels = 1;
768 matroska->current_cluster.pos = 0;
769 matroska->resync_pos = avio_tell(matroska->ctx->pb);
771 matroska->resync_pos -= (av_log2(id) + 7) / 8;
776 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
778 AVIOContext *pb = matroska->ctx->pb;
781 /* Try to seek to the last position to resync from. If this doesn't work,
782 * we resync from the earliest position available: The start of the buffer. */
783 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
784 av_log(matroska->ctx, AV_LOG_WARNING,
785 "Seek to desired resync point failed. Seeking to "
786 "earliest point available instead.\n");
787 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
788 last_pos + 1), SEEK_SET);
793 // try to find a toplevel element
794 while (!avio_feof(pb)) {
795 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
796 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
797 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
798 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
799 /* Prepare the context for parsing of a level 1 element. */
800 matroska_reset_status(matroska, id, -1);
801 /* Given that we are here means that an error has occured,
802 * so treat the segment as unknown length in order not to
803 * discard valid data that happens to be beyond the designated
804 * end of the segment. */
805 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
808 id = (id << 8) | avio_r8(pb);
812 return pb->error ? pb->error : AVERROR_EOF;
816 * Return: Whether we reached the end of a level in the hierarchy or not.
818 static int ebml_level_end(MatroskaDemuxContext *matroska)
820 AVIOContext *pb = matroska->ctx->pb;
821 int64_t pos = avio_tell(pb);
823 if (matroska->num_levels > 0) {
824 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
825 if (pos - level->start >= level->length || matroska->current_id) {
826 matroska->num_levels--;
830 return (matroska->is_live && matroska->ctx->pb->eof_reached) ? 1 : 0;
834 * Read: an "EBML number", which is defined as a variable-length
835 * array of bytes. The first byte indicates the length by giving a
836 * number of 0-bits followed by a one. The position of the first
837 * "one" bit inside the first byte indicates the length of this
839 * Returns: number of bytes read, < 0 on error
841 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
842 int max_size, uint64_t *number, int eof_forbidden)
848 /* The first byte tells us the length in bytes - except when it is zero. */
853 /* get the length of the EBML number */
854 read = 8 - ff_log2_tab[total];
856 if (!total || read > max_size) {
857 pos = avio_tell(pb) - 1;
859 av_log(matroska->ctx, AV_LOG_ERROR,
860 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
861 "of an EBML number\n", pos, pos);
863 av_log(matroska->ctx, AV_LOG_ERROR,
864 "Length %d indicated by an EBML number's first byte 0x%02x "
865 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
866 read, (uint8_t) total, pos, pos, max_size);
868 return AVERROR_INVALIDDATA;
871 /* read out length */
872 total ^= 1 << ff_log2_tab[total];
874 total = (total << 8) | avio_r8(pb);
876 if (pb->eof_reached) {
888 av_log(matroska->ctx, AV_LOG_ERROR,
889 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
894 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
895 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
902 * Read a EBML length value.
903 * This needs special handling for the "unknown length" case which has multiple
906 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
909 int res = ebml_read_num(matroska, pb, 8, number, 1);
910 if (res > 0 && *number + 1 == 1ULL << (7 * res))
911 *number = EBML_UNKNOWN_LENGTH;
916 * Read the next element as an unsigned int.
917 * Returns NEEDS_CHECKING.
919 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
923 /* big-endian ordering; build up number */
926 *num = (*num << 8) | avio_r8(pb);
928 return NEEDS_CHECKING;
932 * Read the next element as a signed int.
933 * Returns NEEDS_CHECKING.
935 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
942 *num = sign_extend(avio_r8(pb), 8);
944 /* big-endian ordering; build up number */
946 *num = ((uint64_t)*num << 8) | avio_r8(pb);
949 return NEEDS_CHECKING;
953 * Read the next element as a float.
954 * Returns NEEDS_CHECKING or < 0 on obvious failure.
956 static int ebml_read_float(AVIOContext *pb, int size, double *num)
961 *num = av_int2float(avio_rb32(pb));
963 *num = av_int2double(avio_rb64(pb));
965 return AVERROR_INVALIDDATA;
967 return NEEDS_CHECKING;
971 * Read the next element as an ASCII string.
972 * 0 is success, < 0 or NEEDS_CHECKING is failure.
974 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
979 /* EBML strings are usually not 0-terminated, so we allocate one
980 * byte more, read the string and NULL-terminate it ourselves. */
981 if (!(res = av_malloc(size + 1)))
982 return AVERROR(ENOMEM);
983 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
985 return ret < 0 ? ret : NEEDS_CHECKING;
995 * Read the next element as binary data.
996 * 0 is success, < 0 or NEEDS_CHECKING is failure.
998 static int ebml_read_binary(AVIOContext *pb, int length, EbmlBin *bin)
1002 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1005 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1007 bin->data = bin->buf->data;
1009 bin->pos = avio_tell(pb);
1010 if ((ret = avio_read(pb, bin->data, length)) != length) {
1011 av_buffer_unref(&bin->buf);
1014 return ret < 0 ? ret : NEEDS_CHECKING;
1021 * Read the next element, but only the header. The contents
1022 * are supposed to be sub-elements which can be read separately.
1023 * 0 is success, < 0 is failure.
1025 static int ebml_read_master(MatroskaDemuxContext *matroska, uint64_t length)
1027 AVIOContext *pb = matroska->ctx->pb;
1028 MatroskaLevel *level;
1030 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1031 av_log(matroska->ctx, AV_LOG_ERROR,
1032 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1033 return AVERROR(ENOSYS);
1036 level = &matroska->levels[matroska->num_levels++];
1037 level->start = avio_tell(pb);
1038 level->length = length;
1044 * Read signed/unsigned "EBML" numbers.
1045 * Return: number of bytes processed, < 0 on error
1047 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1048 uint8_t *data, uint32_t size, uint64_t *num)
1051 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1052 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1056 * Same as above, but signed.
1058 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1059 uint8_t *data, uint32_t size, int64_t *num)
1064 /* read as unsigned number first */
1065 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1068 /* make signed (weird way) */
1069 *num = unum - ((1LL << (7 * res - 1)) - 1);
1074 static int ebml_parse(MatroskaDemuxContext *matroska,
1075 EbmlSyntax *syntax, void *data);
1077 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1080 for (i = 0; syntax[i].id; i++)
1081 if (id == syntax[i].id)
1087 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1092 for (i = 0; syntax[i].id; i++)
1093 switch (syntax[i].type) {
1095 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1098 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1101 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1105 // the default may be NULL
1106 if (syntax[i].def.s) {
1107 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1108 *dst = av_strdup(syntax[i].def.s);
1110 return AVERROR(ENOMEM);
1115 while (!res && !ebml_level_end(matroska))
1116 res = ebml_parse(matroska, syntax, data);
1121 static int is_ebml_id_valid(uint32_t id)
1123 // Due to endian nonsense in Matroska, the highest byte with any bits set
1124 // will contain the leading length bit. This bit in turn identifies the
1125 // total byte length of the element by its position within the byte.
1126 unsigned int bits = av_log2(id);
1127 return id && (bits + 7) / 8 == (8 - bits % 8);
1131 * Allocate and return the entry for the level1 element with the given ID. If
1132 * an entry already exists, return the existing entry.
1134 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1138 MatroskaLevel1Element *elem;
1140 if (!is_ebml_id_valid(id))
1143 // Some files link to all clusters; useless.
1144 if (id == MATROSKA_ID_CLUSTER)
1147 // There can be multiple seekheads.
1148 if (id != MATROSKA_ID_SEEKHEAD) {
1149 for (i = 0; i < matroska->num_level1_elems; i++) {
1150 if (matroska->level1_elems[i].id == id)
1151 return &matroska->level1_elems[i];
1155 // Only a completely broken file would have more elements.
1156 // It also provides a low-effort way to escape from circular seekheads
1157 // (every iteration will add a level1 entry).
1158 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1159 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1163 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1164 *elem = (MatroskaLevel1Element){.id = id};
1169 static int ebml_parse(MatroskaDemuxContext *matroska,
1170 EbmlSyntax *syntax, void *data)
1172 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1176 // max. 16 MB for strings
1177 [EBML_STR] = 0x1000000,
1178 [EBML_UTF8] = 0x1000000,
1179 // max. 256 MB for binary data
1180 [EBML_BIN] = 0x10000000,
1181 // no limits for anything else
1183 AVIOContext *pb = matroska->ctx->pb;
1186 int64_t pos = avio_tell(pb);
1187 int res, update_pos = 1;
1189 MatroskaLevel1Element *level1_elem;
1191 if (!matroska->current_id) {
1193 res = ebml_read_num(matroska, pb, 4, &id, 0);
1195 // in live mode, finish parsing if EOF is reached.
1196 return (matroska->is_live && pb->eof_reached &&
1197 res == AVERROR_EOF) ? 1 : res;
1199 matroska->current_id = id | 1 << 7 * res;
1201 pos -= (av_log2(matroska->current_id) + 7) / 8;
1203 id = matroska->current_id;
1205 syntax = ebml_parse_id(syntax, id);
1206 if (!syntax->id && id == MATROSKA_ID_CLUSTER &&
1207 matroska->num_levels > 0 &&
1208 matroska->levels[matroska->num_levels - 1].length == EBML_UNKNOWN_LENGTH)
1209 return 0; // we reached the end of an unknown size cluster
1210 if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1211 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32"\n", id);
1215 data = (char *) data + syntax->data_offset;
1216 if (syntax->list_elem_size) {
1217 EbmlList *list = data;
1218 newelem = av_realloc_array(list->elem, list->nb_elem + 1, syntax->list_elem_size);
1220 return AVERROR(ENOMEM);
1221 list->elem = newelem;
1222 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1223 memset(data, 0, syntax->list_elem_size);
1227 if (syntax->type != EBML_STOP) {
1228 matroska->current_id = 0;
1229 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1231 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1232 av_log(matroska->ctx, AV_LOG_ERROR,
1233 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for syntax element %i\n",
1234 length, max_lengths[syntax->type], syntax->type);
1235 return AVERROR_INVALIDDATA;
1237 if (matroska->num_levels > 0) {
1238 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
1239 AVIOContext *pb = matroska->ctx->pb;
1240 int64_t pos = avio_tell(pb);
1242 if (length != EBML_UNKNOWN_LENGTH &&
1243 level->length != EBML_UNKNOWN_LENGTH) {
1244 uint64_t elem_end = pos + length,
1245 level_end = level->start + level->length;
1247 if (level_end < elem_end) {
1248 av_log(matroska->ctx, AV_LOG_ERROR,
1249 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1250 "containing master element ending at 0x%"PRIx64"\n",
1251 pos, elem_end, level_end);
1252 return AVERROR_INVALIDDATA;
1254 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1255 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1256 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1257 return AVERROR_INVALIDDATA;
1258 } else if (length == EBML_UNKNOWN_LENGTH && id != MATROSKA_ID_CLUSTER) {
1259 // According to the specifications only clusters and segments
1260 // are allowed to be unknown-sized.
1261 av_log(matroska->ctx, AV_LOG_ERROR,
1262 "Found unknown-sized element other than a cluster at "
1263 "0x%"PRIx64". Dropping the invalid element.\n", pos);
1264 return AVERROR_INVALIDDATA;
1269 // We have found an element that is allowed at this place
1270 // in the hierarchy and it passed all checks, so treat the beginning
1271 // of the element as the "last known good" position.
1272 matroska->resync_pos = pos;
1276 switch (syntax->type) {
1278 res = ebml_read_uint(pb, length, data);
1281 res = ebml_read_sint(pb, length, data);
1284 res = ebml_read_float(pb, length, data);
1288 res = ebml_read_ascii(pb, length, data);
1291 res = ebml_read_binary(pb, length, data);
1295 if ((res = ebml_read_master(matroska, length)) < 0)
1297 if (id == MATROSKA_ID_SEGMENT)
1298 matroska->segment_start = avio_tell(matroska->ctx->pb);
1299 if (id == MATROSKA_ID_CUES)
1300 matroska->cues_parsing_deferred = 0;
1301 if (syntax->type == EBML_LEVEL1 &&
1302 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1303 if (level1_elem->parsed)
1304 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1305 level1_elem->parsed = 1;
1307 return ebml_parse_nest(matroska, syntax->def.n, data);
1313 if (ffio_limit(pb, length) != length) {
1314 // ffio_limit emits its own error message,
1315 // so we don't have to.
1316 return AVERROR(EIO);
1318 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1319 // avio_skip might take us past EOF. We check for this
1320 // by skipping only length - 1 bytes, reading a byte and
1321 // checking the error flags. This is done in order to check
1322 // that the element has been properly skipped even when
1323 // no filesize (that ffio_limit relies on) is available.
1325 res = NEEDS_CHECKING;
1332 if (res == NEEDS_CHECKING) {
1333 if (pb->eof_reached) {
1342 if (res == AVERROR_INVALIDDATA)
1343 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1344 else if (res == AVERROR(EIO))
1345 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1346 else if (res == AVERROR_EOF) {
1347 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1354 static void ebml_free(EbmlSyntax *syntax, void *data)
1357 for (i = 0; syntax[i].id; i++) {
1358 void *data_off = (char *) data + syntax[i].data_offset;
1359 switch (syntax[i].type) {
1365 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1369 if (syntax[i].list_elem_size) {
1370 EbmlList *list = data_off;
1371 char *ptr = list->elem;
1372 for (j = 0; j < list->nb_elem;
1373 j++, ptr += syntax[i].list_elem_size)
1374 ebml_free(syntax[i].def.n, ptr);
1375 av_freep(&list->elem);
1378 ebml_free(syntax[i].def.n, data_off);
1388 static int matroska_probe(const AVProbeData *p)
1391 int len_mask = 0x80, size = 1, n = 1, i;
1394 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1397 /* length of header */
1399 while (size <= 8 && !(total & len_mask)) {
1405 total &= (len_mask - 1);
1407 total = (total << 8) | p->buf[4 + n++];
1409 /* Does the probe data contain the whole header? */
1410 if (p->buf_size < 4 + size + total)
1413 /* The header should contain a known document type. For now,
1414 * we don't parse the whole header but simply check for the
1415 * availability of that array of characters inside the header.
1416 * Not fully fool-proof, but good enough. */
1417 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1418 size_t probelen = strlen(matroska_doctypes[i]);
1419 if (total < probelen)
1421 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1422 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1423 return AVPROBE_SCORE_MAX;
1426 // probably valid EBML header but no recognized doctype
1427 return AVPROBE_SCORE_EXTENSION;
1430 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1433 MatroskaTrack *tracks = matroska->tracks.elem;
1436 for (i = 0; i < matroska->tracks.nb_elem; i++)
1437 if (tracks[i].num == num)
1440 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1444 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1445 MatroskaTrack *track)
1447 MatroskaTrackEncoding *encodings = track->encodings.elem;
1448 uint8_t *data = *buf;
1449 int isize = *buf_size;
1450 uint8_t *pkt_data = NULL;
1451 uint8_t av_unused *newpktdata;
1452 int pkt_size = isize;
1456 if (pkt_size >= 10000000U)
1457 return AVERROR_INVALIDDATA;
1459 switch (encodings[0].compression.algo) {
1460 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1462 int header_size = encodings[0].compression.settings.size;
1463 uint8_t *header = encodings[0].compression.settings.data;
1465 if (header_size && !header) {
1466 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1473 pkt_size = isize + header_size;
1474 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1476 return AVERROR(ENOMEM);
1478 memcpy(pkt_data, header, header_size);
1479 memcpy(pkt_data + header_size, data, isize);
1483 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1485 olen = pkt_size *= 3;
1486 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1487 + AV_INPUT_BUFFER_PADDING_SIZE);
1489 result = AVERROR(ENOMEM);
1492 pkt_data = newpktdata;
1493 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1494 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1496 result = AVERROR_INVALIDDATA;
1503 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1505 z_stream zstream = { 0 };
1506 if (inflateInit(&zstream) != Z_OK)
1508 zstream.next_in = data;
1509 zstream.avail_in = isize;
1512 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1514 inflateEnd(&zstream);
1515 result = AVERROR(ENOMEM);
1518 pkt_data = newpktdata;
1519 zstream.avail_out = pkt_size - zstream.total_out;
1520 zstream.next_out = pkt_data + zstream.total_out;
1521 result = inflate(&zstream, Z_NO_FLUSH);
1522 } while (result == Z_OK && pkt_size < 10000000);
1523 pkt_size = zstream.total_out;
1524 inflateEnd(&zstream);
1525 if (result != Z_STREAM_END) {
1526 if (result == Z_MEM_ERROR)
1527 result = AVERROR(ENOMEM);
1529 result = AVERROR_INVALIDDATA;
1536 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1538 bz_stream bzstream = { 0 };
1539 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1541 bzstream.next_in = data;
1542 bzstream.avail_in = isize;
1545 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1547 BZ2_bzDecompressEnd(&bzstream);
1548 result = AVERROR(ENOMEM);
1551 pkt_data = newpktdata;
1552 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1553 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1554 result = BZ2_bzDecompress(&bzstream);
1555 } while (result == BZ_OK && pkt_size < 10000000);
1556 pkt_size = bzstream.total_out_lo32;
1557 BZ2_bzDecompressEnd(&bzstream);
1558 if (result != BZ_STREAM_END) {
1559 if (result == BZ_MEM_ERROR)
1560 result = AVERROR(ENOMEM);
1562 result = AVERROR_INVALIDDATA;
1569 return AVERROR_INVALIDDATA;
1572 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1575 *buf_size = pkt_size;
1583 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1584 AVDictionary **metadata, char *prefix)
1586 MatroskaTag *tags = list->elem;
1590 for (i = 0; i < list->nb_elem; i++) {
1591 const char *lang = tags[i].lang &&
1592 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1594 if (!tags[i].name) {
1595 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1599 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1601 av_strlcpy(key, tags[i].name, sizeof(key));
1602 if (tags[i].def || !lang) {
1603 av_dict_set(metadata, key, tags[i].string, 0);
1604 if (tags[i].sub.nb_elem)
1605 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1608 av_strlcat(key, "-", sizeof(key));
1609 av_strlcat(key, lang, sizeof(key));
1610 av_dict_set(metadata, key, tags[i].string, 0);
1611 if (tags[i].sub.nb_elem)
1612 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1615 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1618 static void matroska_convert_tags(AVFormatContext *s)
1620 MatroskaDemuxContext *matroska = s->priv_data;
1621 MatroskaTags *tags = matroska->tags.elem;
1624 for (i = 0; i < matroska->tags.nb_elem; i++) {
1625 if (tags[i].target.attachuid) {
1626 MatroskaAttachment *attachment = matroska->attachments.elem;
1628 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1629 if (attachment[j].uid == tags[i].target.attachuid &&
1630 attachment[j].stream) {
1631 matroska_convert_tag(s, &tags[i].tag,
1632 &attachment[j].stream->metadata, NULL);
1637 av_log(NULL, AV_LOG_WARNING,
1638 "The tags at index %d refer to a "
1639 "non-existent attachment %"PRId64".\n",
1640 i, tags[i].target.attachuid);
1642 } else if (tags[i].target.chapteruid) {
1643 MatroskaChapter *chapter = matroska->chapters.elem;
1645 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1646 if (chapter[j].uid == tags[i].target.chapteruid &&
1647 chapter[j].chapter) {
1648 matroska_convert_tag(s, &tags[i].tag,
1649 &chapter[j].chapter->metadata, NULL);
1654 av_log(NULL, AV_LOG_WARNING,
1655 "The tags at index %d refer to a non-existent chapter "
1657 i, tags[i].target.chapteruid);
1659 } else if (tags[i].target.trackuid) {
1660 MatroskaTrack *track = matroska->tracks.elem;
1662 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1663 if (track[j].uid == tags[i].target.trackuid &&
1665 matroska_convert_tag(s, &tags[i].tag,
1666 &track[j].stream->metadata, NULL);
1671 av_log(NULL, AV_LOG_WARNING,
1672 "The tags at index %d refer to a non-existent track "
1674 i, tags[i].target.trackuid);
1677 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1678 tags[i].target.type);
1683 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1686 uint32_t saved_id = matroska->current_id;
1687 int64_t before_pos = avio_tell(matroska->ctx->pb);
1688 MatroskaLevel level;
1693 offset = pos + matroska->segment_start;
1694 if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) == offset) {
1695 /* We don't want to lose our seekhead level, so we add
1696 * a dummy. This is a crude hack. */
1697 if (matroska->num_levels == EBML_MAX_DEPTH) {
1698 av_log(matroska->ctx, AV_LOG_INFO,
1699 "Max EBML element depth (%d) reached, "
1700 "cannot parse further.\n", EBML_MAX_DEPTH);
1701 ret = AVERROR_INVALIDDATA;
1704 level.length = EBML_UNKNOWN_LENGTH;
1705 matroska->levels[matroska->num_levels] = level;
1706 matroska->num_levels++;
1707 matroska->current_id = 0;
1709 ret = ebml_parse(matroska, matroska_segment, matroska);
1712 /* Seek back - notice that in all instances where this is used it is safe
1713 * to set the level to 1 and unset the position of the current cluster. */
1714 matroska_reset_status(matroska, saved_id, before_pos);
1719 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1721 EbmlList *seekhead_list = &matroska->seekhead;
1724 // we should not do any seeking in the streaming case
1725 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1728 for (i = 0; i < seekhead_list->nb_elem; i++) {
1729 MatroskaSeekhead *seekheads = seekhead_list->elem;
1730 uint32_t id = seekheads[i].id;
1731 uint64_t pos = seekheads[i].pos;
1733 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1734 if (!elem || elem->parsed)
1739 // defer cues parsing until we actually need cue data.
1740 if (id == MATROSKA_ID_CUES)
1743 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1744 // mark index as broken
1745 matroska->cues_parsing_deferred = -1;
1753 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1755 EbmlList *index_list;
1756 MatroskaIndex *index;
1757 uint64_t index_scale = 1;
1760 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1763 index_list = &matroska->index;
1764 index = index_list->elem;
1765 if (index_list->nb_elem < 2)
1767 if (index[1].time > 1E14 / matroska->time_scale) {
1768 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1771 for (i = 0; i < index_list->nb_elem; i++) {
1772 EbmlList *pos_list = &index[i].pos;
1773 MatroskaIndexPos *pos = pos_list->elem;
1774 for (j = 0; j < pos_list->nb_elem; j++) {
1775 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1777 if (track && track->stream)
1778 av_add_index_entry(track->stream,
1779 pos[j].pos + matroska->segment_start,
1780 index[i].time / index_scale, 0, 0,
1786 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1789 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1792 for (i = 0; i < matroska->num_level1_elems; i++) {
1793 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1794 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1795 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1796 matroska->cues_parsing_deferred = -1;
1802 matroska_add_index_entries(matroska);
1805 static int matroska_aac_profile(char *codec_id)
1807 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1810 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1811 if (strstr(codec_id, aac_profiles[profile]))
1816 static int matroska_aac_sri(int samplerate)
1820 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1821 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1826 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1828 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1829 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1832 static int matroska_parse_flac(AVFormatContext *s,
1833 MatroskaTrack *track,
1836 AVStream *st = track->stream;
1837 uint8_t *p = track->codec_priv.data;
1838 int size = track->codec_priv.size;
1840 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1841 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1842 track->codec_priv.size = 0;
1846 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1848 p += track->codec_priv.size;
1849 size -= track->codec_priv.size;
1851 /* parse the remaining metadata blocks if present */
1853 int block_last, block_type, block_size;
1855 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1859 if (block_size > size)
1862 /* check for the channel mask */
1863 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1864 AVDictionary *dict = NULL;
1865 AVDictionaryEntry *chmask;
1867 ff_vorbis_comment(s, &dict, p, block_size, 0);
1868 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1870 uint64_t mask = strtol(chmask->value, NULL, 0);
1871 if (!mask || mask & ~0x3ffffULL) {
1872 av_log(s, AV_LOG_WARNING,
1873 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1875 st->codecpar->channel_layout = mask;
1877 av_dict_free(&dict);
1887 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
1889 int major, minor, micro, bttb = 0;
1891 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
1892 * this function, and fixed in 57.52 */
1893 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
1894 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
1896 switch (field_order) {
1897 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
1898 return AV_FIELD_PROGRESSIVE;
1899 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
1900 return AV_FIELD_UNKNOWN;
1901 case MATROSKA_VIDEO_FIELDORDER_TT:
1903 case MATROSKA_VIDEO_FIELDORDER_BB:
1905 case MATROSKA_VIDEO_FIELDORDER_BT:
1906 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
1907 case MATROSKA_VIDEO_FIELDORDER_TB:
1908 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
1910 return AV_FIELD_UNKNOWN;
1914 static void mkv_stereo_mode_display_mul(int stereo_mode,
1915 int *h_width, int *h_height)
1917 switch (stereo_mode) {
1918 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
1919 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
1920 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
1921 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
1922 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
1924 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
1925 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
1926 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
1927 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
1930 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
1931 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
1932 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
1933 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
1939 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
1940 const MatroskaTrackVideoColor *color = track->video.color.elem;
1941 const MatroskaMasteringMeta *mastering_meta;
1942 int has_mastering_primaries, has_mastering_luminance;
1944 if (!track->video.color.nb_elem)
1947 mastering_meta = &color->mastering_meta;
1948 // Mastering primaries are CIE 1931 coords, and must be > 0.
1949 has_mastering_primaries =
1950 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
1951 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
1952 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
1953 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
1954 has_mastering_luminance = mastering_meta->max_luminance > 0;
1956 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
1957 st->codecpar->color_space = color->matrix_coefficients;
1958 if (color->primaries != AVCOL_PRI_RESERVED &&
1959 color->primaries != AVCOL_PRI_RESERVED0)
1960 st->codecpar->color_primaries = color->primaries;
1961 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
1962 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
1963 st->codecpar->color_trc = color->transfer_characteristics;
1964 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
1965 color->range <= AVCOL_RANGE_JPEG)
1966 st->codecpar->color_range = color->range;
1967 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
1968 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
1969 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
1970 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
1971 st->codecpar->chroma_location =
1972 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
1973 (color->chroma_siting_vert - 1) << 7);
1975 if (color->max_cll && color->max_fall) {
1978 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
1980 return AVERROR(ENOMEM);
1981 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
1982 (uint8_t *)metadata, size);
1984 av_freep(&metadata);
1987 metadata->MaxCLL = color->max_cll;
1988 metadata->MaxFALL = color->max_fall;
1991 if (has_mastering_primaries || has_mastering_luminance) {
1992 // Use similar rationals as other standards.
1993 const int chroma_den = 50000;
1994 const int luma_den = 10000;
1995 AVMasteringDisplayMetadata *metadata =
1996 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
1997 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
1998 sizeof(AVMasteringDisplayMetadata));
2000 return AVERROR(ENOMEM);
2002 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2003 if (has_mastering_primaries) {
2004 metadata->display_primaries[0][0] = av_make_q(
2005 round(mastering_meta->r_x * chroma_den), chroma_den);
2006 metadata->display_primaries[0][1] = av_make_q(
2007 round(mastering_meta->r_y * chroma_den), chroma_den);
2008 metadata->display_primaries[1][0] = av_make_q(
2009 round(mastering_meta->g_x * chroma_den), chroma_den);
2010 metadata->display_primaries[1][1] = av_make_q(
2011 round(mastering_meta->g_y * chroma_den), chroma_den);
2012 metadata->display_primaries[2][0] = av_make_q(
2013 round(mastering_meta->b_x * chroma_den), chroma_den);
2014 metadata->display_primaries[2][1] = av_make_q(
2015 round(mastering_meta->b_y * chroma_den), chroma_den);
2016 metadata->white_point[0] = av_make_q(
2017 round(mastering_meta->white_x * chroma_den), chroma_den);
2018 metadata->white_point[1] = av_make_q(
2019 round(mastering_meta->white_y * chroma_den), chroma_den);
2020 metadata->has_primaries = 1;
2022 if (has_mastering_luminance) {
2023 metadata->max_luminance = av_make_q(
2024 round(mastering_meta->max_luminance * luma_den), luma_den);
2025 metadata->min_luminance = av_make_q(
2026 round(mastering_meta->min_luminance * luma_den), luma_den);
2027 metadata->has_luminance = 1;
2033 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2034 AVSphericalMapping *spherical;
2035 enum AVSphericalProjection projection;
2036 size_t spherical_size;
2037 uint32_t l = 0, t = 0, r = 0, b = 0;
2038 uint32_t padding = 0;
2042 bytestream2_init(&gb, track->video.projection.private.data,
2043 track->video.projection.private.size);
2045 if (bytestream2_get_byte(&gb) != 0) {
2046 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2050 bytestream2_skip(&gb, 3); // flags
2052 switch (track->video.projection.type) {
2053 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2054 if (track->video.projection.private.size == 20) {
2055 t = bytestream2_get_be32(&gb);
2056 b = bytestream2_get_be32(&gb);
2057 l = bytestream2_get_be32(&gb);
2058 r = bytestream2_get_be32(&gb);
2060 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2061 av_log(NULL, AV_LOG_ERROR,
2062 "Invalid bounding rectangle coordinates "
2063 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2065 return AVERROR_INVALIDDATA;
2067 } else if (track->video.projection.private.size != 0) {
2068 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2069 return AVERROR_INVALIDDATA;
2072 if (l || t || r || b)
2073 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2075 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2077 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2078 if (track->video.projection.private.size < 4) {
2079 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2080 return AVERROR_INVALIDDATA;
2081 } else if (track->video.projection.private.size == 12) {
2082 uint32_t layout = bytestream2_get_be32(&gb);
2084 av_log(NULL, AV_LOG_WARNING,
2085 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2088 projection = AV_SPHERICAL_CUBEMAP;
2089 padding = bytestream2_get_be32(&gb);
2091 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2092 return AVERROR_INVALIDDATA;
2095 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2096 /* No Spherical metadata */
2099 av_log(NULL, AV_LOG_WARNING,
2100 "Unknown spherical metadata type %"PRIu64"\n",
2101 track->video.projection.type);
2105 spherical = av_spherical_alloc(&spherical_size);
2107 return AVERROR(ENOMEM);
2109 spherical->projection = projection;
2111 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2112 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2113 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2115 spherical->padding = padding;
2117 spherical->bound_left = l;
2118 spherical->bound_top = t;
2119 spherical->bound_right = r;
2120 spherical->bound_bottom = b;
2122 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2125 av_freep(&spherical);
2132 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2134 const AVCodecTag *codec_tags;
2136 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2137 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2139 /* Normalize noncompliant private data that starts with the fourcc
2140 * by expanding/shifting the data by 4 bytes and storing the data
2141 * size at the start. */
2142 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2143 int ret = av_buffer_realloc(&track->codec_priv.buf,
2144 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2148 track->codec_priv.data = track->codec_priv.buf->data;
2149 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2150 track->codec_priv.size += 4;
2151 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2154 *fourcc = AV_RL32(track->codec_priv.data + 4);
2155 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2160 static int matroska_parse_tracks(AVFormatContext *s)
2162 MatroskaDemuxContext *matroska = s->priv_data;
2163 MatroskaTrack *tracks = matroska->tracks.elem;
2168 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2169 MatroskaTrack *track = &tracks[i];
2170 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2171 EbmlList *encodings_list = &track->encodings;
2172 MatroskaTrackEncoding *encodings = encodings_list->elem;
2173 uint8_t *extradata = NULL;
2174 int extradata_size = 0;
2175 int extradata_offset = 0;
2176 uint32_t fourcc = 0;
2178 char* key_id_base64 = NULL;
2181 /* Apply some sanity checks. */
2182 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2183 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2184 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2185 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2186 av_log(matroska->ctx, AV_LOG_INFO,
2187 "Unknown or unsupported track type %"PRIu64"\n",
2191 if (!track->codec_id)
2194 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2195 isnan(track->audio.samplerate)) {
2196 av_log(matroska->ctx, AV_LOG_WARNING,
2197 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2198 track->audio.samplerate);
2199 track->audio.samplerate = 8000;
2202 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2203 if (!track->default_duration && track->video.frame_rate > 0) {
2204 double default_duration = 1000000000 / track->video.frame_rate;
2205 if (default_duration > UINT64_MAX || default_duration < 0) {
2206 av_log(matroska->ctx, AV_LOG_WARNING,
2207 "Invalid frame rate %e. Cannot calculate default duration.\n",
2208 track->video.frame_rate);
2210 track->default_duration = default_duration;
2213 if (track->video.display_width == -1)
2214 track->video.display_width = track->video.pixel_width;
2215 if (track->video.display_height == -1)
2216 track->video.display_height = track->video.pixel_height;
2217 if (track->video.color_space.size == 4)
2218 fourcc = AV_RL32(track->video.color_space.data);
2219 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2220 if (!track->audio.out_samplerate)
2221 track->audio.out_samplerate = track->audio.samplerate;
2223 if (encodings_list->nb_elem > 1) {
2224 av_log(matroska->ctx, AV_LOG_ERROR,
2225 "Multiple combined encodings not supported");
2226 } else if (encodings_list->nb_elem == 1) {
2227 if (encodings[0].type) {
2228 if (encodings[0].encryption.key_id.size > 0) {
2229 /* Save the encryption key id to be stored later as a
2231 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2232 key_id_base64 = av_malloc(b64_size);
2233 if (key_id_base64 == NULL)
2234 return AVERROR(ENOMEM);
2236 av_base64_encode(key_id_base64, b64_size,
2237 encodings[0].encryption.key_id.data,
2238 encodings[0].encryption.key_id.size);
2240 encodings[0].scope = 0;
2241 av_log(matroska->ctx, AV_LOG_ERROR,
2242 "Unsupported encoding type");
2246 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2249 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2252 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2254 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2255 encodings[0].scope = 0;
2256 av_log(matroska->ctx, AV_LOG_ERROR,
2257 "Unsupported encoding type");
2258 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2259 uint8_t *codec_priv = track->codec_priv.data;
2260 int ret = matroska_decode_buffer(&track->codec_priv.data,
2261 &track->codec_priv.size,
2264 track->codec_priv.data = NULL;
2265 track->codec_priv.size = 0;
2266 av_log(matroska->ctx, AV_LOG_ERROR,
2267 "Failed to decode codec private data\n");
2270 if (codec_priv != track->codec_priv.data) {
2271 av_buffer_unref(&track->codec_priv.buf);
2272 if (track->codec_priv.data) {
2273 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2274 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2276 if (!track->codec_priv.buf) {
2277 av_freep(&track->codec_priv.data);
2278 track->codec_priv.size = 0;
2279 return AVERROR(ENOMEM);
2286 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2287 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2288 strlen(ff_mkv_codec_tags[j].str))) {
2289 codec_id = ff_mkv_codec_tags[j].id;
2294 st = track->stream = avformat_new_stream(s, NULL);
2296 av_free(key_id_base64);
2297 return AVERROR(ENOMEM);
2300 if (key_id_base64) {
2301 /* export encryption key id as base64 metadata tag */
2302 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2303 av_freep(&key_id_base64);
2306 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2307 track->codec_priv.size >= 40 &&
2308 track->codec_priv.data) {
2309 track->ms_compat = 1;
2310 bit_depth = AV_RL16(track->codec_priv.data + 14);
2311 fourcc = AV_RL32(track->codec_priv.data + 16);
2312 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2315 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2317 extradata_offset = 40;
2318 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2319 track->codec_priv.size >= 14 &&
2320 track->codec_priv.data) {
2322 ffio_init_context(&b, track->codec_priv.data,
2323 track->codec_priv.size,
2324 0, NULL, NULL, NULL, NULL);
2325 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2328 codec_id = st->codecpar->codec_id;
2329 fourcc = st->codecpar->codec_tag;
2330 extradata_offset = FFMIN(track->codec_priv.size, 18);
2331 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2332 /* Normally 36, but allow noncompliant private data */
2333 && (track->codec_priv.size >= 32)
2334 && (track->codec_priv.data)) {
2335 uint16_t sample_size;
2336 int ret = get_qt_codec(track, &fourcc, &codec_id);
2339 sample_size = AV_RB16(track->codec_priv.data + 26);
2341 if (sample_size == 8) {
2342 fourcc = MKTAG('r','a','w',' ');
2343 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2344 } else if (sample_size == 16) {
2345 fourcc = MKTAG('t','w','o','s');
2346 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2349 if ((fourcc == MKTAG('t','w','o','s') ||
2350 fourcc == MKTAG('s','o','w','t')) &&
2352 codec_id = AV_CODEC_ID_PCM_S8;
2353 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2354 (track->codec_priv.size >= 21) &&
2355 (track->codec_priv.data)) {
2356 int ret = get_qt_codec(track, &fourcc, &codec_id);
2359 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2360 fourcc = MKTAG('S','V','Q','3');
2361 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2363 if (codec_id == AV_CODEC_ID_NONE)
2364 av_log(matroska->ctx, AV_LOG_ERROR,
2365 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2366 if (track->codec_priv.size >= 86) {
2367 bit_depth = AV_RB16(track->codec_priv.data + 82);
2368 ffio_init_context(&b, track->codec_priv.data,
2369 track->codec_priv.size,
2370 0, NULL, NULL, NULL, NULL);
2371 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2373 track->has_palette = 1;
2376 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2377 switch (track->audio.bitdepth) {
2379 codec_id = AV_CODEC_ID_PCM_U8;
2382 codec_id = AV_CODEC_ID_PCM_S24BE;
2385 codec_id = AV_CODEC_ID_PCM_S32BE;
2388 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2389 switch (track->audio.bitdepth) {
2391 codec_id = AV_CODEC_ID_PCM_U8;
2394 codec_id = AV_CODEC_ID_PCM_S24LE;
2397 codec_id = AV_CODEC_ID_PCM_S32LE;
2400 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2401 track->audio.bitdepth == 64) {
2402 codec_id = AV_CODEC_ID_PCM_F64LE;
2403 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2404 int profile = matroska_aac_profile(track->codec_id);
2405 int sri = matroska_aac_sri(track->audio.samplerate);
2406 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2408 return AVERROR(ENOMEM);
2409 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2410 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2411 if (strstr(track->codec_id, "SBR")) {
2412 sri = matroska_aac_sri(track->audio.out_samplerate);
2413 extradata[2] = 0x56;
2414 extradata[3] = 0xE5;
2415 extradata[4] = 0x80 | (sri << 3);
2419 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2420 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2421 * Create the "atom size", "tag", and "tag version" fields the
2422 * decoder expects manually. */
2423 extradata_size = 12 + track->codec_priv.size;
2424 extradata = av_mallocz(extradata_size +
2425 AV_INPUT_BUFFER_PADDING_SIZE);
2427 return AVERROR(ENOMEM);
2428 AV_WB32(extradata, extradata_size);
2429 memcpy(&extradata[4], "alac", 4);
2430 AV_WB32(&extradata[8], 0);
2431 memcpy(&extradata[12], track->codec_priv.data,
2432 track->codec_priv.size);
2433 } else if (codec_id == AV_CODEC_ID_TTA) {
2434 extradata_size = 30;
2435 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2437 return AVERROR(ENOMEM);
2438 ffio_init_context(&b, extradata, extradata_size, 1,
2439 NULL, NULL, NULL, NULL);
2440 avio_write(&b, "TTA1", 4);
2442 if (track->audio.channels > UINT16_MAX ||
2443 track->audio.bitdepth > UINT16_MAX) {
2444 av_log(matroska->ctx, AV_LOG_WARNING,
2445 "Too large audio channel number %"PRIu64
2446 " or bitdepth %"PRIu64". Skipping track.\n",
2447 track->audio.channels, track->audio.bitdepth);
2448 av_freep(&extradata);
2449 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2450 return AVERROR_INVALIDDATA;
2454 avio_wl16(&b, track->audio.channels);
2455 avio_wl16(&b, track->audio.bitdepth);
2456 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2457 return AVERROR_INVALIDDATA;
2458 avio_wl32(&b, track->audio.out_samplerate);
2459 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2460 track->audio.out_samplerate,
2461 AV_TIME_BASE * 1000));
2462 } else if (codec_id == AV_CODEC_ID_RV10 ||
2463 codec_id == AV_CODEC_ID_RV20 ||
2464 codec_id == AV_CODEC_ID_RV30 ||
2465 codec_id == AV_CODEC_ID_RV40) {
2466 extradata_offset = 26;
2467 } else if (codec_id == AV_CODEC_ID_RA_144) {
2468 track->audio.out_samplerate = 8000;
2469 track->audio.channels = 1;
2470 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2471 codec_id == AV_CODEC_ID_COOK ||
2472 codec_id == AV_CODEC_ID_ATRAC3 ||
2473 codec_id == AV_CODEC_ID_SIPR)
2474 && track->codec_priv.data) {
2477 ffio_init_context(&b, track->codec_priv.data,
2478 track->codec_priv.size,
2479 0, NULL, NULL, NULL, NULL);
2481 flavor = avio_rb16(&b);
2482 track->audio.coded_framesize = avio_rb32(&b);
2484 track->audio.sub_packet_h = avio_rb16(&b);
2485 track->audio.frame_size = avio_rb16(&b);
2486 track->audio.sub_packet_size = avio_rb16(&b);
2488 track->audio.coded_framesize <= 0 ||
2489 track->audio.sub_packet_h <= 0 ||
2490 track->audio.frame_size <= 0 ||
2491 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2492 return AVERROR_INVALIDDATA;
2493 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2494 track->audio.frame_size);
2495 if (!track->audio.buf)
2496 return AVERROR(ENOMEM);
2497 if (codec_id == AV_CODEC_ID_RA_288) {
2498 st->codecpar->block_align = track->audio.coded_framesize;
2499 track->codec_priv.size = 0;
2501 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2502 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2503 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2504 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2506 st->codecpar->block_align = track->audio.sub_packet_size;
2507 extradata_offset = 78;
2509 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2510 ret = matroska_parse_flac(s, track, &extradata_offset);
2513 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2514 fourcc = AV_RL32(track->codec_priv.data);
2515 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2516 /* we don't need any value stored in CodecPrivate.
2517 make sure that it's not exported as extradata. */
2518 track->codec_priv.size = 0;
2519 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2520 /* For now, propagate only the OBUs, if any. Once libavcodec is
2521 updated to handle isobmff style extradata this can be removed. */
2522 extradata_offset = 4;
2524 track->codec_priv.size -= extradata_offset;
2526 if (codec_id == AV_CODEC_ID_NONE)
2527 av_log(matroska->ctx, AV_LOG_INFO,
2528 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2530 if (track->time_scale < 0.01)
2531 track->time_scale = 1.0;
2532 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2533 1000 * 1000 * 1000); /* 64 bit pts in ns */
2535 /* convert the delay from ns to the track timebase */
2536 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2537 (AVRational){ 1, 1000000000 },
2540 st->codecpar->codec_id = codec_id;
2542 if (strcmp(track->language, "und"))
2543 av_dict_set(&st->metadata, "language", track->language, 0);
2544 av_dict_set(&st->metadata, "title", track->name, 0);
2546 if (track->flag_default)
2547 st->disposition |= AV_DISPOSITION_DEFAULT;
2548 if (track->flag_forced)
2549 st->disposition |= AV_DISPOSITION_FORCED;
2551 if (!st->codecpar->extradata) {
2553 st->codecpar->extradata = extradata;
2554 st->codecpar->extradata_size = extradata_size;
2555 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2556 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2557 return AVERROR(ENOMEM);
2558 memcpy(st->codecpar->extradata,
2559 track->codec_priv.data + extradata_offset,
2560 track->codec_priv.size);
2564 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2565 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2566 int display_width_mul = 1;
2567 int display_height_mul = 1;
2569 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2570 st->codecpar->codec_tag = fourcc;
2572 st->codecpar->bits_per_coded_sample = bit_depth;
2573 st->codecpar->width = track->video.pixel_width;
2574 st->codecpar->height = track->video.pixel_height;
2576 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2577 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2578 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2579 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2581 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2582 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2584 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2585 av_reduce(&st->sample_aspect_ratio.num,
2586 &st->sample_aspect_ratio.den,
2587 st->codecpar->height * track->video.display_width * display_width_mul,
2588 st->codecpar->width * track->video.display_height * display_height_mul,
2591 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2592 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2594 if (track->default_duration) {
2595 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2596 1000000000, track->default_duration, 30000);
2597 #if FF_API_R_FRAME_RATE
2598 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2599 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2600 st->r_frame_rate = st->avg_frame_rate;
2604 /* export stereo mode flag as metadata tag */
2605 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2606 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2608 /* export alpha mode flag as metadata tag */
2609 if (track->video.alpha_mode)
2610 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2612 /* if we have virtual track, mark the real tracks */
2613 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2615 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2617 snprintf(buf, sizeof(buf), "%s_%d",
2618 ff_matroska_video_stereo_plane[planes[j].type], i);
2619 for (k=0; k < matroska->tracks.nb_elem; k++)
2620 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2621 av_dict_set(&tracks[k].stream->metadata,
2622 "stereo_mode", buf, 0);
2626 // add stream level stereo3d side data if it is a supported format
2627 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2628 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2629 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2634 ret = mkv_parse_video_color(st, track);
2637 ret = mkv_parse_video_projection(st, track);
2640 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2641 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2642 st->codecpar->codec_tag = fourcc;
2643 st->codecpar->sample_rate = track->audio.out_samplerate;
2644 st->codecpar->channels = track->audio.channels;
2645 if (!st->codecpar->bits_per_coded_sample)
2646 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2647 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2648 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2649 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2650 st->need_parsing = AVSTREAM_PARSE_FULL;
2651 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2652 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2653 if (track->codec_delay > 0) {
2654 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2655 (AVRational){1, 1000000000},
2656 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2657 48000 : st->codecpar->sample_rate});
2659 if (track->seek_preroll > 0) {
2660 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2661 (AVRational){1, 1000000000},
2662 (AVRational){1, st->codecpar->sample_rate});
2664 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2665 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2667 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2668 st->disposition |= AV_DISPOSITION_CAPTIONS;
2669 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2670 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2671 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2672 st->disposition |= AV_DISPOSITION_METADATA;
2674 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2675 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2682 static int matroska_read_header(AVFormatContext *s)
2684 MatroskaDemuxContext *matroska = s->priv_data;
2685 EbmlList *attachments_list = &matroska->attachments;
2686 EbmlList *chapters_list = &matroska->chapters;
2687 MatroskaAttachment *attachments;
2688 MatroskaChapter *chapters;
2689 uint64_t max_start = 0;
2695 matroska->cues_parsing_deferred = 1;
2697 /* First read the EBML header. */
2698 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2699 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2700 ebml_free(ebml_syntax, &ebml);
2701 return AVERROR_INVALIDDATA;
2703 if (ebml.version > EBML_VERSION ||
2704 ebml.max_size > sizeof(uint64_t) ||
2705 ebml.id_length > sizeof(uint32_t) ||
2706 ebml.doctype_version > 3) {
2707 avpriv_report_missing_feature(matroska->ctx,
2708 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2709 ebml.version, ebml.doctype, ebml.doctype_version);
2710 ebml_free(ebml_syntax, &ebml);
2711 return AVERROR_PATCHWELCOME;
2712 } else if (ebml.doctype_version == 3) {
2713 av_log(matroska->ctx, AV_LOG_WARNING,
2714 "EBML header using unsupported features\n"
2715 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2716 ebml.version, ebml.doctype, ebml.doctype_version);
2718 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2719 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2721 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2722 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2723 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2724 ebml_free(ebml_syntax, &ebml);
2725 return AVERROR_INVALIDDATA;
2728 ebml_free(ebml_syntax, &ebml);
2730 /* The next thing is a segment. */
2731 pos = avio_tell(matroska->ctx->pb);
2732 res = ebml_parse(matroska, matroska_segments, matroska);
2733 // try resyncing until we find a EBML_STOP type element.
2735 res = matroska_resync(matroska, pos);
2738 pos = avio_tell(matroska->ctx->pb);
2739 res = ebml_parse(matroska, matroska_segment, matroska);
2741 /* Set data_offset as it might be needed later by seek_frame_generic. */
2742 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2743 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2744 matroska_execute_seekhead(matroska);
2746 if (!matroska->time_scale)
2747 matroska->time_scale = 1000000;
2748 if (matroska->duration)
2749 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2750 1000 / AV_TIME_BASE;
2751 av_dict_set(&s->metadata, "title", matroska->title, 0);
2752 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2754 if (matroska->date_utc.size == 8)
2755 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2757 res = matroska_parse_tracks(s);
2761 attachments = attachments_list->elem;
2762 for (j = 0; j < attachments_list->nb_elem; j++) {
2763 if (!(attachments[j].filename && attachments[j].mime &&
2764 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2765 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2767 AVStream *st = avformat_new_stream(s, NULL);
2770 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2771 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2772 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2774 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2775 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2776 strlen(ff_mkv_image_mime_tags[i].str))) {
2777 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2782 attachments[j].stream = st;
2784 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2785 AVPacket *pkt = &st->attached_pic;
2787 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2788 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2790 av_init_packet(pkt);
2791 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2793 return AVERROR(ENOMEM);
2794 pkt->data = attachments[j].bin.data;
2795 pkt->size = attachments[j].bin.size;
2796 pkt->stream_index = st->index;
2797 pkt->flags |= AV_PKT_FLAG_KEY;
2799 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2800 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2802 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2803 attachments[j].bin.size);
2805 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2806 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2807 strlen(ff_mkv_mime_tags[i].str))) {
2808 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2816 chapters = chapters_list->elem;
2817 for (i = 0; i < chapters_list->nb_elem; i++)
2818 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2819 (max_start == 0 || chapters[i].start > max_start)) {
2820 chapters[i].chapter =
2821 avpriv_new_chapter(s, chapters[i].uid,
2822 (AVRational) { 1, 1000000000 },
2823 chapters[i].start, chapters[i].end,
2825 if (chapters[i].chapter) {
2826 av_dict_set(&chapters[i].chapter->metadata,
2827 "title", chapters[i].title, 0);
2829 max_start = chapters[i].start;
2832 matroska_add_index_entries(matroska);
2834 matroska_convert_tags(s);
2838 matroska_read_close(s);
2843 * Put one packet in an application-supplied AVPacket struct.
2844 * Returns 0 on success or -1 on failure.
2846 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2849 if (matroska->queue) {
2850 MatroskaTrack *tracks = matroska->tracks.elem;
2851 MatroskaTrack *track;
2853 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2854 track = &tracks[pkt->stream_index];
2855 if (track->has_palette) {
2856 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2858 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2860 memcpy(pal, track->palette, AVPALETTE_SIZE);
2862 track->has_palette = 0;
2871 * Free all packets in our internal queue.
2873 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
2875 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
2878 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
2879 int *buf_size, int type,
2880 uint32_t **lace_buf, int *laces)
2882 int res = 0, n, size = *buf_size;
2883 uint8_t *data = *buf;
2884 uint32_t *lace_size;
2888 *lace_buf = av_malloc(sizeof(**lace_buf));
2890 return AVERROR(ENOMEM);
2892 *lace_buf[0] = size;
2896 av_assert0(size > 0);
2900 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
2902 return AVERROR(ENOMEM);
2905 case 0x1: /* Xiph lacing */
2909 for (n = 0; res == 0 && n < *laces - 1; n++) {
2913 if (size <= total) {
2914 res = AVERROR_INVALIDDATA;
2919 lace_size[n] += temp;
2926 if (size <= total) {
2927 res = AVERROR_INVALIDDATA;
2931 lace_size[n] = size - total;
2935 case 0x2: /* fixed-size lacing */
2936 if (size % (*laces)) {
2937 res = AVERROR_INVALIDDATA;
2940 for (n = 0; n < *laces; n++)
2941 lace_size[n] = size / *laces;
2944 case 0x3: /* EBML lacing */
2948 n = matroska_ebmlnum_uint(matroska, data, size, &num);
2949 if (n < 0 || num > INT_MAX) {
2950 av_log(matroska->ctx, AV_LOG_INFO,
2951 "EBML block data error\n");
2952 res = n<0 ? n : AVERROR_INVALIDDATA;
2957 total = lace_size[0] = num;
2958 for (n = 1; res == 0 && n < *laces - 1; n++) {
2961 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
2962 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
2963 av_log(matroska->ctx, AV_LOG_INFO,
2964 "EBML block data error\n");
2965 res = r<0 ? r : AVERROR_INVALIDDATA;
2970 lace_size[n] = lace_size[n - 1] + snum;
2971 total += lace_size[n];
2973 if (size <= total) {
2974 res = AVERROR_INVALIDDATA;
2977 lace_size[*laces - 1] = size - total;
2983 *lace_buf = lace_size;
2989 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
2990 MatroskaTrack *track, AVStream *st,
2991 uint8_t *data, int size, uint64_t timecode,
2994 int a = st->codecpar->block_align;
2995 int sps = track->audio.sub_packet_size;
2996 int cfs = track->audio.coded_framesize;
2997 int h = track->audio.sub_packet_h;
2998 int y = track->audio.sub_packet_cnt;
2999 int w = track->audio.frame_size;
3002 if (!track->audio.pkt_cnt) {
3003 if (track->audio.sub_packet_cnt == 0)
3004 track->audio.buf_timecode = timecode;
3005 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3006 if (size < cfs * h / 2) {
3007 av_log(matroska->ctx, AV_LOG_ERROR,
3008 "Corrupt int4 RM-style audio packet size\n");
3009 return AVERROR_INVALIDDATA;
3011 for (x = 0; x < h / 2; x++)
3012 memcpy(track->audio.buf + x * 2 * w + y * cfs,
3013 data + x * cfs, cfs);
3014 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3016 av_log(matroska->ctx, AV_LOG_ERROR,
3017 "Corrupt sipr RM-style audio packet size\n");
3018 return AVERROR_INVALIDDATA;
3020 memcpy(track->audio.buf + y * w, data, w);
3022 if (size < sps * w / sps || h<=0 || w%sps) {
3023 av_log(matroska->ctx, AV_LOG_ERROR,
3024 "Corrupt generic RM-style audio packet size\n");
3025 return AVERROR_INVALIDDATA;
3027 for (x = 0; x < w / sps; x++)
3028 memcpy(track->audio.buf +
3029 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3030 data + x * sps, sps);
3033 if (++track->audio.sub_packet_cnt >= h) {
3034 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3035 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3036 track->audio.sub_packet_cnt = 0;
3037 track->audio.pkt_cnt = h * w / a;
3041 while (track->audio.pkt_cnt) {
3043 AVPacket pktl, *pkt = &pktl;
3045 ret = av_new_packet(pkt, a);
3050 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3052 pkt->pts = track->audio.buf_timecode;
3053 track->audio.buf_timecode = AV_NOPTS_VALUE;
3055 pkt->stream_index = st->index;
3056 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3058 av_packet_unref(pkt);
3059 return AVERROR(ENOMEM);
3066 /* reconstruct full wavpack blocks from mangled matroska ones */
3067 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3068 uint8_t **pdst, int *size)
3070 uint8_t *dst = NULL;
3075 int ret, offset = 0;
3077 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3078 return AVERROR_INVALIDDATA;
3080 ver = AV_RL16(track->stream->codecpar->extradata);
3082 samples = AV_RL32(src);
3086 while (srclen >= 8) {
3091 uint32_t flags = AV_RL32(src);
3092 uint32_t crc = AV_RL32(src + 4);
3096 multiblock = (flags & 0x1800) != 0x1800;
3099 ret = AVERROR_INVALIDDATA;
3102 blocksize = AV_RL32(src);
3108 if (blocksize > srclen) {
3109 ret = AVERROR_INVALIDDATA;
3113 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3115 ret = AVERROR(ENOMEM);
3119 dstlen += blocksize + 32;
3121 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3122 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3123 AV_WL16(dst + offset + 8, ver); // version
3124 AV_WL16(dst + offset + 10, 0); // track/index_no
3125 AV_WL32(dst + offset + 12, 0); // total samples
3126 AV_WL32(dst + offset + 16, 0); // block index
3127 AV_WL32(dst + offset + 20, samples); // number of samples
3128 AV_WL32(dst + offset + 24, flags); // flags
3129 AV_WL32(dst + offset + 28, crc); // crc
3130 memcpy(dst + offset + 32, src, blocksize); // block data
3133 srclen -= blocksize;
3134 offset += blocksize + 32;
3137 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3149 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3150 uint8_t **pdst, int *size)
3155 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3156 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3158 return AVERROR(ENOMEM);
3160 AV_WB32(dst, dstlen);
3161 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3162 memcpy(dst + 8, src, dstlen);
3163 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3173 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3174 MatroskaTrack *track,
3176 uint8_t *data, int data_len,
3181 AVPacket pktl, *pkt = &pktl;
3182 uint8_t *id, *settings, *text, *buf;
3183 int id_len, settings_len, text_len;
3188 return AVERROR_INVALIDDATA;
3191 q = data + data_len;
3196 if (*p == '\r' || *p == '\n') {
3205 if (p >= q || *p != '\n')
3206 return AVERROR_INVALIDDATA;
3212 if (*p == '\r' || *p == '\n') {
3213 settings_len = p - settings;
3221 if (p >= q || *p != '\n')
3222 return AVERROR_INVALIDDATA;
3227 while (text_len > 0) {
3228 const int len = text_len - 1;
3229 const uint8_t c = p[len];
3230 if (c != '\r' && c != '\n')
3236 return AVERROR_INVALIDDATA;
3238 err = av_new_packet(pkt, text_len);
3243 memcpy(pkt->data, text, text_len);
3246 buf = av_packet_new_side_data(pkt,
3247 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3250 av_packet_unref(pkt);
3251 return AVERROR(ENOMEM);
3253 memcpy(buf, id, id_len);
3256 if (settings_len > 0) {
3257 buf = av_packet_new_side_data(pkt,
3258 AV_PKT_DATA_WEBVTT_SETTINGS,
3261 av_packet_unref(pkt);
3262 return AVERROR(ENOMEM);
3264 memcpy(buf, settings, settings_len);
3267 // Do we need this for subtitles?
3268 // pkt->flags = AV_PKT_FLAG_KEY;
3270 pkt->stream_index = st->index;
3271 pkt->pts = timecode;
3273 // Do we need this for subtitles?
3274 // pkt->dts = timecode;
3276 pkt->duration = duration;
3279 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3281 av_packet_unref(pkt);
3282 return AVERROR(ENOMEM);
3288 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3289 MatroskaTrack *track, AVStream *st,
3290 AVBufferRef *buf, uint8_t *data, int pkt_size,
3291 uint64_t timecode, uint64_t lace_duration,
3292 int64_t pos, int is_keyframe,
3293 uint8_t *additional, uint64_t additional_id, int additional_size,
3294 int64_t discard_padding)
3296 MatroskaTrackEncoding *encodings = track->encodings.elem;
3297 uint8_t *pkt_data = data;
3299 AVPacket pktl, *pkt = &pktl;
3301 if (encodings && !encodings->type && encodings->scope & 1) {
3302 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3307 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3309 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3311 av_log(matroska->ctx, AV_LOG_ERROR,
3312 "Error parsing a wavpack block.\n");
3315 if (pkt_data != data)
3316 av_freep(&pkt_data);
3320 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3322 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3324 av_log(matroska->ctx, AV_LOG_ERROR,
3325 "Error parsing a prores block.\n");
3328 if (pkt_data != data)
3329 av_freep(&pkt_data);
3333 av_init_packet(pkt);
3334 if (pkt_data != data)
3335 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3338 pkt->buf = av_buffer_ref(buf);
3341 res = AVERROR(ENOMEM);
3345 pkt->data = pkt_data;
3346 pkt->size = pkt_size;
3347 pkt->flags = is_keyframe;
3348 pkt->stream_index = st->index;
3350 if (additional_size > 0) {
3351 uint8_t *side_data = av_packet_new_side_data(pkt,
3352 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3353 additional_size + 8);
3355 av_packet_unref(pkt);
3356 return AVERROR(ENOMEM);
3358 AV_WB64(side_data, additional_id);
3359 memcpy(side_data + 8, additional, additional_size);
3362 if (discard_padding) {
3363 uint8_t *side_data = av_packet_new_side_data(pkt,
3364 AV_PKT_DATA_SKIP_SAMPLES,
3367 av_packet_unref(pkt);
3368 return AVERROR(ENOMEM);
3370 discard_padding = av_rescale_q(discard_padding,
3371 (AVRational){1, 1000000000},
3372 (AVRational){1, st->codecpar->sample_rate});
3373 if (discard_padding > 0) {
3374 AV_WL32(side_data + 4, discard_padding);
3376 AV_WL32(side_data, -discard_padding);
3380 if (track->ms_compat)
3381 pkt->dts = timecode;
3383 pkt->pts = timecode;
3385 pkt->duration = lace_duration;
3387 #if FF_API_CONVERGENCE_DURATION
3388 FF_DISABLE_DEPRECATION_WARNINGS
3389 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3390 pkt->convergence_duration = lace_duration;
3392 FF_ENABLE_DEPRECATION_WARNINGS
3395 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3397 av_packet_unref(pkt);
3398 return AVERROR(ENOMEM);
3404 if (pkt_data != data)
3405 av_freep(&pkt_data);
3409 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3410 int size, int64_t pos, uint64_t cluster_time,
3411 uint64_t block_duration, int is_keyframe,
3412 uint8_t *additional, uint64_t additional_id, int additional_size,
3413 int64_t cluster_pos, int64_t discard_padding)
3415 uint64_t timecode = AV_NOPTS_VALUE;
3416 MatroskaTrack *track;
3420 uint32_t *lace_size = NULL;
3421 int n, flags, laces = 0;
3423 int trust_default_duration = 1;
3425 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3431 track = matroska_find_track_by_num(matroska, num);
3432 if (!track || !track->stream) {
3433 av_log(matroska->ctx, AV_LOG_INFO,
3434 "Invalid stream %"PRIu64"\n", num);
3435 return AVERROR_INVALIDDATA;
3436 } else if (size <= 3)
3439 if (st->discard >= AVDISCARD_ALL)
3441 av_assert1(block_duration != AV_NOPTS_VALUE);
3443 block_time = sign_extend(AV_RB16(data), 16);
3447 if (is_keyframe == -1)
3448 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3450 if (cluster_time != (uint64_t) -1 &&
3451 (block_time >= 0 || cluster_time >= -block_time)) {
3452 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3453 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3454 timecode < track->end_timecode)
3455 is_keyframe = 0; /* overlapping subtitles are not key frame */
3457 ff_reduce_index(matroska->ctx, st->index);
3458 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3463 if (matroska->skip_to_keyframe &&
3464 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3465 // Compare signed timecodes. Timecode may be negative due to codec delay
3466 // offset. We don't support timestamps greater than int64_t anyway - see
3468 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3471 matroska->skip_to_keyframe = 0;
3472 else if (!st->skip_to_keyframe) {
3473 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3474 matroska->skip_to_keyframe = 0;
3478 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3479 &lace_size, &laces);
3484 if (track->audio.samplerate == 8000) {
3485 // If this is needed for more codecs, then add them here
3486 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3487 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3488 trust_default_duration = 0;
3492 if (!block_duration && trust_default_duration)
3493 block_duration = track->default_duration * laces / matroska->time_scale;
3495 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3496 track->end_timecode =
3497 FFMAX(track->end_timecode, timecode + block_duration);
3499 for (n = 0; n < laces; n++) {
3500 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3502 if (lace_size[n] > size) {
3503 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3507 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3508 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3509 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3510 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3511 st->codecpar->block_align && track->audio.sub_packet_size) {
3512 res = matroska_parse_rm_audio(matroska, track, st, data,
3518 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3519 res = matroska_parse_webvtt(matroska, track, st,
3521 timecode, lace_duration,
3526 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3527 timecode, lace_duration, pos,
3528 !n ? is_keyframe : 0,
3529 additional, additional_id, additional_size,
3535 if (timecode != AV_NOPTS_VALUE)
3536 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3537 data += lace_size[n];
3538 size -= lace_size[n];
3546 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3548 MatroskaCluster *cluster = &matroska->current_cluster;
3549 MatroskaBlock *block = &cluster->block;
3551 res = ebml_parse(matroska,
3552 matroska_cluster_parsing,
3557 ebml_level_end(matroska);
3558 cluster->pos = avio_tell(matroska->ctx->pb);
3559 /* sizeof the ID which was already read */
3560 if (matroska->current_id)
3562 res = ebml_parse(matroska,
3565 /* Try parsing the block again. */
3567 res = ebml_parse(matroska,
3568 matroska_cluster_parsing,
3572 if (!res && block->bin.size > 0) {
3573 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3574 uint8_t* additional = block->additional.size > 0 ?
3575 block->additional.data : NULL;
3577 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3578 block->bin.size, block->bin.pos,
3579 matroska->current_cluster.timecode,
3580 block->duration, is_keyframe,
3581 additional, block->additional_id,
3582 block->additional.size,
3584 block->discard_padding);
3587 ebml_free(matroska_blockgroup, block);
3588 memset(block, 0, sizeof(*block));
3593 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3595 MatroskaDemuxContext *matroska = s->priv_data;
3598 if (matroska->resync_pos == -1) {
3599 // This can only happen if generic seeking has been used.
3600 matroska->resync_pos = avio_tell(s->pb);
3603 while (matroska_deliver_packet(matroska, pkt)) {
3605 return (ret < 0) ? ret : AVERROR_EOF;
3606 if (matroska_parse_cluster(matroska) < 0)
3607 ret = matroska_resync(matroska, matroska->resync_pos);
3613 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3614 int64_t timestamp, int flags)
3616 MatroskaDemuxContext *matroska = s->priv_data;
3617 MatroskaTrack *tracks = NULL;
3618 AVStream *st = s->streams[stream_index];
3621 /* Parse the CUES now since we need the index data to seek. */
3622 if (matroska->cues_parsing_deferred > 0) {
3623 matroska->cues_parsing_deferred = 0;
3624 matroska_parse_cues(matroska);
3627 if (!st->nb_index_entries)
3629 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3631 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3632 matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3633 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3634 matroska_clear_queue(matroska);
3635 if (matroska_parse_cluster(matroska) < 0)
3640 matroska_clear_queue(matroska);
3641 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3644 tracks = matroska->tracks.elem;
3645 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3646 tracks[i].audio.pkt_cnt = 0;
3647 tracks[i].audio.sub_packet_cnt = 0;
3648 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3649 tracks[i].end_timecode = 0;
3652 /* We seek to a level 1 element, so set the appropriate status. */
3653 matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3654 if (flags & AVSEEK_FLAG_ANY) {
3655 st->skip_to_keyframe = 0;
3656 matroska->skip_to_timecode = timestamp;
3658 st->skip_to_keyframe = 1;
3659 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3661 matroska->skip_to_keyframe = 1;
3663 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3666 // slightly hackish but allows proper fallback to
3667 // the generic seeking code.
3668 matroska_reset_status(matroska, 0, -1);
3669 matroska->resync_pos = -1;
3670 matroska_clear_queue(matroska);
3671 st->skip_to_keyframe =
3672 matroska->skip_to_keyframe = 0;
3677 static int matroska_read_close(AVFormatContext *s)
3679 MatroskaDemuxContext *matroska = s->priv_data;
3680 MatroskaTrack *tracks = matroska->tracks.elem;
3683 matroska_clear_queue(matroska);
3685 for (n = 0; n < matroska->tracks.nb_elem; n++)
3686 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3687 av_freep(&tracks[n].audio.buf);
3688 ebml_free(matroska_segment, matroska);
3694 int64_t start_time_ns;
3695 int64_t end_time_ns;
3696 int64_t start_offset;
3700 /* This function searches all the Cues and returns the CueDesc corresponding to
3701 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3702 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3704 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3705 MatroskaDemuxContext *matroska = s->priv_data;
3708 int nb_index_entries = s->streams[0]->nb_index_entries;
3709 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3710 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3711 for (i = 1; i < nb_index_entries; i++) {
3712 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3713 index_entries[i].timestamp * matroska->time_scale > ts) {
3718 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3719 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3720 if (i != nb_index_entries - 1) {
3721 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3722 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3724 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3725 // FIXME: this needs special handling for files where Cues appear
3726 // before Clusters. the current logic assumes Cues appear after
3728 cue_desc.end_offset = cues_start - matroska->segment_start;
3733 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3735 MatroskaDemuxContext *matroska = s->priv_data;
3736 uint32_t id = matroska->current_id;
3737 int64_t cluster_pos, before_pos;
3739 if (s->streams[0]->nb_index_entries <= 0) return 0;
3740 // seek to the first cluster using cues.
3741 index = av_index_search_timestamp(s->streams[0], 0, 0);
3742 if (index < 0) return 0;
3743 cluster_pos = s->streams[0]->index_entries[index].pos;
3744 before_pos = avio_tell(s->pb);
3746 uint64_t cluster_id, cluster_length;
3749 avio_seek(s->pb, cluster_pos, SEEK_SET);
3750 // read cluster id and length
3751 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3752 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3754 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3758 matroska_reset_status(matroska, 0, cluster_pos);
3759 matroska_clear_queue(matroska);
3760 if (matroska_parse_cluster(matroska) < 0 ||
3764 pkt = &matroska->queue->pkt;
3765 // 4 + read is the length of the cluster id and the cluster length field.
3766 cluster_pos += 4 + read + cluster_length;
3767 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3773 /* Restore the status after matroska_read_header: */
3774 matroska_reset_status(matroska, id, before_pos);
3779 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3780 double min_buffer, double* buffer,
3781 double* sec_to_download, AVFormatContext *s,
3784 double nano_seconds_per_second = 1000000000.0;
3785 double time_sec = time_ns / nano_seconds_per_second;
3787 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3788 int64_t end_time_ns = time_ns + time_to_search_ns;
3789 double sec_downloaded = 0.0;
3790 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3791 if (desc_curr.start_time_ns == -1)
3793 *sec_to_download = 0.0;
3795 // Check for non cue start time.
3796 if (time_ns > desc_curr.start_time_ns) {
3797 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3798 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3799 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3800 double timeToDownload = (cueBytes * 8.0) / bps;
3802 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3803 *sec_to_download += timeToDownload;
3805 // Check if the search ends within the first cue.
3806 if (desc_curr.end_time_ns >= end_time_ns) {
3807 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3808 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3809 sec_downloaded = percent_to_sub * sec_downloaded;
3810 *sec_to_download = percent_to_sub * *sec_to_download;
3813 if ((sec_downloaded + *buffer) <= min_buffer) {
3817 // Get the next Cue.
3818 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3821 while (desc_curr.start_time_ns != -1) {
3822 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3823 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3824 double desc_sec = desc_ns / nano_seconds_per_second;
3825 double bits = (desc_bytes * 8.0);
3826 double time_to_download = bits / bps;
3828 sec_downloaded += desc_sec - time_to_download;
3829 *sec_to_download += time_to_download;
3831 if (desc_curr.end_time_ns >= end_time_ns) {
3832 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3833 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3834 sec_downloaded = percent_to_sub * sec_downloaded;
3835 *sec_to_download = percent_to_sub * *sec_to_download;
3837 if ((sec_downloaded + *buffer) <= min_buffer)
3842 if ((sec_downloaded + *buffer) <= min_buffer) {
3847 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3849 *buffer = *buffer + sec_downloaded;
3853 /* This function computes the bandwidth of the WebM file with the help of
3854 * buffer_size_after_time_downloaded() function. Both of these functions are
3855 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3856 * Matroska parsing mechanism.
3858 * Returns the bandwidth of the file on success; -1 on error.
3860 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3862 MatroskaDemuxContext *matroska = s->priv_data;
3863 AVStream *st = s->streams[0];
3864 double bandwidth = 0.0;
3867 for (i = 0; i < st->nb_index_entries; i++) {
3868 int64_t prebuffer_ns = 1000000000;
3869 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
3870 double nano_seconds_per_second = 1000000000.0;
3871 int64_t prebuffered_ns = time_ns + prebuffer_ns;
3872 double prebuffer_bytes = 0.0;
3873 int64_t temp_prebuffer_ns = prebuffer_ns;
3874 int64_t pre_bytes, pre_ns;
3875 double pre_sec, prebuffer, bits_per_second;
3876 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
3878 // Start with the first Cue.
3879 CueDesc desc_end = desc_beg;
3881 // Figure out how much data we have downloaded for the prebuffer. This will
3882 // be used later to adjust the bits per sample to try.
3883 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
3884 // Prebuffered the entire Cue.
3885 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
3886 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
3887 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3889 if (desc_end.start_time_ns == -1) {
3890 // The prebuffer is larger than the duration.
3891 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
3893 bits_per_second = 0.0;
3895 // The prebuffer ends in the last Cue. Estimate how much data was
3897 pre_bytes = desc_end.end_offset - desc_end.start_offset;
3898 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
3899 pre_sec = pre_ns / nano_seconds_per_second;
3901 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
3903 prebuffer = prebuffer_ns / nano_seconds_per_second;
3905 // Set this to 0.0 in case our prebuffer buffers the entire video.
3906 bits_per_second = 0.0;
3908 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
3909 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
3910 double desc_sec = desc_ns / nano_seconds_per_second;
3911 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
3913 // Drop the bps by the percentage of bytes buffered.
3914 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
3915 double mod_bits_per_second = calc_bits_per_second * percent;
3917 if (prebuffer < desc_sec) {
3919 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
3921 // Add 1 so the bits per second should be a little bit greater than file
3923 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
3924 const double min_buffer = 0.0;
3925 double buffer = prebuffer;
3926 double sec_to_download = 0.0;
3928 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
3929 min_buffer, &buffer, &sec_to_download,
3933 } else if (rv == 0) {
3934 bits_per_second = (double)(bps);
3939 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
3940 } while (desc_end.start_time_ns != -1);
3942 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
3944 return (int64_t)bandwidth;
3947 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
3949 MatroskaDemuxContext *matroska = s->priv_data;
3950 EbmlList *seekhead_list = &matroska->seekhead;
3951 MatroskaSeekhead *seekhead = seekhead_list->elem;
3953 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
3957 // determine cues start and end positions
3958 for (i = 0; i < seekhead_list->nb_elem; i++)
3959 if (seekhead[i].id == MATROSKA_ID_CUES)
3962 if (i >= seekhead_list->nb_elem) return -1;
3964 before_pos = avio_tell(matroska->ctx->pb);
3965 cues_start = seekhead[i].pos + matroska->segment_start;
3966 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
3967 // cues_end is computed as cues_start + cues_length + length of the
3968 // Cues element ID (i.e. 4) + EBML length of the Cues element.
3969 // cues_end is inclusive and the above sum is reduced by 1.
3970 uint64_t cues_length, cues_id;
3972 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
3973 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
3974 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
3975 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
3978 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
3980 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
3981 if (cues_start == -1 || cues_end == -1) return -1;
3984 matroska_parse_cues(matroska);
3987 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
3990 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
3992 // if the file has cues at the start, fix up the init range so tht
3993 // it does not include it
3994 if (cues_start <= init_range)
3995 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
3998 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
3999 if (bandwidth < 0) return -1;
4000 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4002 // check if all clusters start with key frames
4003 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4005 // store cue point timestamps as a comma separated list for checking subsegment alignment in
4006 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4007 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
4008 if (!buf) return -1;
4010 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4011 int ret = snprintf(buf + end, 20,
4012 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4013 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4014 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4015 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4017 return AVERROR_INVALIDDATA;
4021 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4027 static int webm_dash_manifest_read_header(AVFormatContext *s)
4030 int ret = matroska_read_header(s);
4032 MatroskaTrack *tracks;
4033 MatroskaDemuxContext *matroska = s->priv_data;
4035 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4038 if (!s->nb_streams) {
4039 matroska_read_close(s);
4040 av_log(s, AV_LOG_ERROR, "No streams found\n");
4041 return AVERROR_INVALIDDATA;
4044 if (!matroska->is_live) {
4045 buf = av_asprintf("%g", matroska->duration);
4046 if (!buf) return AVERROR(ENOMEM);
4047 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4050 // initialization range
4051 // 5 is the offset of Cluster ID.
4052 init_range = avio_tell(s->pb) - 5;
4053 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4056 // basename of the file
4057 buf = strrchr(s->url, '/');
4058 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4061 tracks = matroska->tracks.elem;
4062 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4064 // parse the cues and populate Cue related fields
4065 if (!matroska->is_live) {
4066 ret = webm_dash_manifest_cues(s, init_range);
4068 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4073 // use the bandwidth from the command line if it was provided
4074 if (matroska->bandwidth > 0) {
4075 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4076 matroska->bandwidth, 0);
4081 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4086 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4087 static const AVOption options[] = {
4088 { "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 },
4089 { "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 },
4093 static const AVClass webm_dash_class = {
4094 .class_name = "WebM DASH Manifest demuxer",
4095 .item_name = av_default_item_name,
4097 .version = LIBAVUTIL_VERSION_INT,
4100 AVInputFormat ff_matroska_demuxer = {
4101 .name = "matroska,webm",
4102 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4103 .extensions = "mkv,mk3d,mka,mks",
4104 .priv_data_size = sizeof(MatroskaDemuxContext),
4105 .read_probe = matroska_probe,
4106 .read_header = matroska_read_header,
4107 .read_packet = matroska_read_packet,
4108 .read_close = matroska_read_close,
4109 .read_seek = matroska_read_seek,
4110 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4113 AVInputFormat ff_webm_dash_manifest_demuxer = {
4114 .name = "webm_dash_manifest",
4115 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4116 .priv_data_size = sizeof(MatroskaDemuxContext),
4117 .read_header = webm_dash_manifest_read_header,
4118 .read_packet = webm_dash_manifest_read_packet,
4119 .read_close = matroska_read_close,
4120 .priv_class = &webm_dash_class,