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/mathematics.h"
43 #include "libavutil/time_internal.h"
45 #include "libavcodec/bytestream.h"
46 #include "libavcodec/flac.h"
47 #include "libavcodec/mpeg4audio.h"
50 #include "avio_internal.h"
55 /* For ff_codec_get_id(). */
80 typedef const struct EbmlSyntax
{
89 const struct EbmlSyntax
*n
;
109 uint64_t doctype_version
;
115 } MatroskaTrackCompression
;
120 } MatroskaTrackEncryption
;
125 MatroskaTrackCompression compression
;
126 MatroskaTrackEncryption encryption
;
127 } MatroskaTrackEncoding
;
131 uint64_t display_width
;
132 uint64_t display_height
;
133 uint64_t pixel_width
;
134 uint64_t pixel_height
;
136 uint64_t stereo_mode
;
138 } MatroskaTrackVideo
;
142 double out_samplerate
;
146 /* real audio header (extracted from extradata) */
153 uint64_t buf_timecode
;
155 } MatroskaTrackAudio
;
160 } MatroskaTrackPlane
;
163 EbmlList combine_planes
;
164 } MatroskaTrackOperation
;
175 uint64_t default_duration
;
176 uint64_t flag_default
;
177 uint64_t flag_forced
;
178 uint64_t seek_preroll
;
179 MatroskaTrackVideo video
;
180 MatroskaTrackAudio audio
;
181 MatroskaTrackOperation operation
;
183 uint64_t codec_delay
;
186 int64_t end_timecode
;
188 uint64_t max_block_additional_id
;
198 } MatroskaAttachment
;
236 MatroskaTagTarget target
;
256 AVFormatContext
*ctx
;
260 MatroskaLevel levels
[EBML_MAX_DEPTH
];
270 EbmlList attachments
;
276 /* byte position of the segment inside the stream */
277 int64_t segment_start
;
279 /* the packet queue */
286 /* What to skip before effectively reading a packet. */
287 int skip_to_keyframe
;
288 uint64_t skip_to_timecode
;
290 /* File has a CUES element, but we defer parsing until it is needed. */
291 int cues_parsing_deferred
;
293 int current_cluster_num_blocks
;
294 int64_t current_cluster_pos
;
295 MatroskaCluster current_cluster
;
297 /* File has SSA subtitles which prevent incremental cluster parsing. */
299 } MatroskaDemuxContext
;
306 uint64_t additional_id
;
308 int64_t discard_padding
;
311 static EbmlSyntax ebml_header
[] = {
312 { EBML_ID_EBMLREADVERSION
, EBML_UINT
, 0, offsetof(Ebml
, version
), { .u
= EBML_VERSION
} },
313 { EBML_ID_EBMLMAXSIZELENGTH
, EBML_UINT
, 0, offsetof(Ebml
, max_size
), { .u
= 8 } },
314 { EBML_ID_EBMLMAXIDLENGTH
, EBML_UINT
, 0, offsetof(Ebml
, id_length
), { .u
= 4 } },
315 { EBML_ID_DOCTYPE
, EBML_STR
, 0, offsetof(Ebml
, doctype
), { .s
= "(none)" } },
316 { EBML_ID_DOCTYPEREADVERSION
, EBML_UINT
, 0, offsetof(Ebml
, doctype_version
), { .u
= 1 } },
317 { EBML_ID_EBMLVERSION
, EBML_NONE
},
318 { EBML_ID_DOCTYPEVERSION
, EBML_NONE
},
322 static EbmlSyntax ebml_syntax
[] = {
323 { EBML_ID_HEADER
, EBML_NEST
, 0, 0, { .n
= ebml_header
} },
327 static EbmlSyntax matroska_info
[] = {
328 { MATROSKA_ID_TIMECODESCALE
, EBML_UINT
, 0, offsetof(MatroskaDemuxContext
, time_scale
), { .u
= 1000000 } },
329 { MATROSKA_ID_DURATION
, EBML_FLOAT
, 0, offsetof(MatroskaDemuxContext
, duration
) },
330 { MATROSKA_ID_TITLE
, EBML_UTF8
, 0, offsetof(MatroskaDemuxContext
, title
) },
331 { MATROSKA_ID_WRITINGAPP
, EBML_NONE
},
332 { MATROSKA_ID_MUXINGAPP
, EBML_UTF8
, 0, offsetof(MatroskaDemuxContext
, muxingapp
) },
333 { MATROSKA_ID_DATEUTC
, EBML_BIN
, 0, offsetof(MatroskaDemuxContext
, date_utc
) },
334 { MATROSKA_ID_SEGMENTUID
, EBML_NONE
},
338 static EbmlSyntax matroska_track_video
[] = {
339 { MATROSKA_ID_VIDEOFRAMERATE
, EBML_FLOAT
, 0, offsetof(MatroskaTrackVideo
, frame_rate
) },
340 { MATROSKA_ID_VIDEODISPLAYWIDTH
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, display_width
), { .u
=-1 } },
341 { MATROSKA_ID_VIDEODISPLAYHEIGHT
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, display_height
), { .u
=-1 } },
342 { MATROSKA_ID_VIDEOPIXELWIDTH
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, pixel_width
) },
343 { MATROSKA_ID_VIDEOPIXELHEIGHT
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, pixel_height
) },
344 { MATROSKA_ID_VIDEOCOLORSPACE
, EBML_BIN
, 0, offsetof(MatroskaTrackVideo
, color_space
) },
345 { MATROSKA_ID_VIDEOALPHAMODE
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, alpha_mode
) },
346 { MATROSKA_ID_VIDEOPIXELCROPB
, EBML_NONE
},
347 { MATROSKA_ID_VIDEOPIXELCROPT
, EBML_NONE
},
348 { MATROSKA_ID_VIDEOPIXELCROPL
, EBML_NONE
},
349 { MATROSKA_ID_VIDEOPIXELCROPR
, EBML_NONE
},
350 { MATROSKA_ID_VIDEODISPLAYUNIT
, EBML_NONE
},
351 { MATROSKA_ID_VIDEOFLAGINTERLACED
, EBML_NONE
},
352 { MATROSKA_ID_VIDEOSTEREOMODE
, EBML_UINT
, 0, offsetof(MatroskaTrackVideo
, stereo_mode
), { .u
= MATROSKA_VIDEO_STEREOMODE_TYPE_NB
} },
353 { MATROSKA_ID_VIDEOASPECTRATIO
, EBML_NONE
},
357 static EbmlSyntax matroska_track_audio
[] = {
358 { MATROSKA_ID_AUDIOSAMPLINGFREQ
, EBML_FLOAT
, 0, offsetof(MatroskaTrackAudio
, samplerate
), { .f
= 8000.0 } },
359 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ
, EBML_FLOAT
, 0, offsetof(MatroskaTrackAudio
, out_samplerate
) },
360 { MATROSKA_ID_AUDIOBITDEPTH
, EBML_UINT
, 0, offsetof(MatroskaTrackAudio
, bitdepth
) },
361 { MATROSKA_ID_AUDIOCHANNELS
, EBML_UINT
, 0, offsetof(MatroskaTrackAudio
, channels
), { .u
= 1 } },
365 static EbmlSyntax matroska_track_encoding_compression
[] = {
366 { MATROSKA_ID_ENCODINGCOMPALGO
, EBML_UINT
, 0, offsetof(MatroskaTrackCompression
, algo
), { .u
= 0 } },
367 { MATROSKA_ID_ENCODINGCOMPSETTINGS
, EBML_BIN
, 0, offsetof(MatroskaTrackCompression
, settings
) },
371 static EbmlSyntax matroska_track_encoding_encryption
[] = {
372 { MATROSKA_ID_ENCODINGENCALGO
, EBML_UINT
, 0, offsetof(MatroskaTrackEncryption
,algo
), {.u
= 0} },
373 { MATROSKA_ID_ENCODINGENCKEYID
, EBML_BIN
, 0, offsetof(MatroskaTrackEncryption
,key_id
) },
374 { MATROSKA_ID_ENCODINGENCAESSETTINGS
, EBML_NONE
},
375 { MATROSKA_ID_ENCODINGSIGALGO
, EBML_NONE
},
376 { MATROSKA_ID_ENCODINGSIGHASHALGO
, EBML_NONE
},
377 { MATROSKA_ID_ENCODINGSIGKEYID
, EBML_NONE
},
378 { MATROSKA_ID_ENCODINGSIGNATURE
, EBML_NONE
},
381 static EbmlSyntax matroska_track_encoding
[] = {
382 { MATROSKA_ID_ENCODINGSCOPE
, EBML_UINT
, 0, offsetof(MatroskaTrackEncoding
, scope
), { .u
= 1 } },
383 { MATROSKA_ID_ENCODINGTYPE
, EBML_UINT
, 0, offsetof(MatroskaTrackEncoding
, type
), { .u
= 0 } },
384 { MATROSKA_ID_ENCODINGCOMPRESSION
, EBML_NEST
, 0, offsetof(MatroskaTrackEncoding
, compression
), { .n
= matroska_track_encoding_compression
} },
385 { MATROSKA_ID_ENCODINGENCRYPTION
, EBML_NEST
, 0, offsetof(MatroskaTrackEncoding
, encryption
), { .n
= matroska_track_encoding_encryption
} },
386 { MATROSKA_ID_ENCODINGORDER
, EBML_NONE
},
390 static EbmlSyntax matroska_track_encodings
[] = {
391 { MATROSKA_ID_TRACKCONTENTENCODING
, EBML_NEST
, sizeof(MatroskaTrackEncoding
), offsetof(MatroskaTrack
, encodings
), { .n
= matroska_track_encoding
} },
395 static EbmlSyntax matroska_track_plane
[] = {
396 { MATROSKA_ID_TRACKPLANEUID
, EBML_UINT
, 0, offsetof(MatroskaTrackPlane
,uid
) },
397 { MATROSKA_ID_TRACKPLANETYPE
, EBML_UINT
, 0, offsetof(MatroskaTrackPlane
,type
) },
401 static EbmlSyntax matroska_track_combine_planes
[] = {
402 { MATROSKA_ID_TRACKPLANE
, EBML_NEST
, sizeof(MatroskaTrackPlane
), offsetof(MatroskaTrackOperation
,combine_planes
), {.n
= matroska_track_plane
} },
406 static EbmlSyntax matroska_track_operation
[] = {
407 { MATROSKA_ID_TRACKCOMBINEPLANES
, EBML_NEST
, 0, 0, {.n
= matroska_track_combine_planes
} },
411 static EbmlSyntax matroska_track
[] = {
412 { MATROSKA_ID_TRACKNUMBER
, EBML_UINT
, 0, offsetof(MatroskaTrack
, num
) },
413 { MATROSKA_ID_TRACKNAME
, EBML_UTF8
, 0, offsetof(MatroskaTrack
, name
) },
414 { MATROSKA_ID_TRACKUID
, EBML_UINT
, 0, offsetof(MatroskaTrack
, uid
) },
415 { MATROSKA_ID_TRACKTYPE
, EBML_UINT
, 0, offsetof(MatroskaTrack
, type
) },
416 { MATROSKA_ID_CODECID
, EBML_STR
, 0, offsetof(MatroskaTrack
, codec_id
) },
417 { MATROSKA_ID_CODECPRIVATE
, EBML_BIN
, 0, offsetof(MatroskaTrack
, codec_priv
) },
418 { MATROSKA_ID_CODECDELAY
, EBML_UINT
, 0, offsetof(MatroskaTrack
, codec_delay
) },
419 { MATROSKA_ID_TRACKLANGUAGE
, EBML_UTF8
, 0, offsetof(MatroskaTrack
, language
), { .s
= "eng" } },
420 { MATROSKA_ID_TRACKDEFAULTDURATION
, EBML_UINT
, 0, offsetof(MatroskaTrack
, default_duration
) },
421 { MATROSKA_ID_TRACKTIMECODESCALE
, EBML_FLOAT
, 0, offsetof(MatroskaTrack
, time_scale
), { .f
= 1.0 } },
422 { MATROSKA_ID_TRACKFLAGDEFAULT
, EBML_UINT
, 0, offsetof(MatroskaTrack
, flag_default
), { .u
= 1 } },
423 { MATROSKA_ID_TRACKFLAGFORCED
, EBML_UINT
, 0, offsetof(MatroskaTrack
, flag_forced
), { .u
= 0 } },
424 { MATROSKA_ID_TRACKVIDEO
, EBML_NEST
, 0, offsetof(MatroskaTrack
, video
), { .n
= matroska_track_video
} },
425 { MATROSKA_ID_TRACKAUDIO
, EBML_NEST
, 0, offsetof(MatroskaTrack
, audio
), { .n
= matroska_track_audio
} },
426 { MATROSKA_ID_TRACKOPERATION
, EBML_NEST
, 0, offsetof(MatroskaTrack
, operation
), { .n
= matroska_track_operation
} },
427 { MATROSKA_ID_TRACKCONTENTENCODINGS
, EBML_NEST
, 0, 0, { .n
= matroska_track_encodings
} },
428 { MATROSKA_ID_TRACKMAXBLKADDID
, EBML_UINT
, 0, offsetof(MatroskaTrack
, max_block_additional_id
) },
429 { MATROSKA_ID_SEEKPREROLL
, EBML_UINT
, 0, offsetof(MatroskaTrack
, seek_preroll
) },
430 { MATROSKA_ID_TRACKFLAGENABLED
, EBML_NONE
},
431 { MATROSKA_ID_TRACKFLAGLACING
, EBML_NONE
},
432 { MATROSKA_ID_CODECNAME
, EBML_NONE
},
433 { MATROSKA_ID_CODECDECODEALL
, EBML_NONE
},
434 { MATROSKA_ID_CODECINFOURL
, EBML_NONE
},
435 { MATROSKA_ID_CODECDOWNLOADURL
, EBML_NONE
},
436 { MATROSKA_ID_TRACKMINCACHE
, EBML_NONE
},
437 { MATROSKA_ID_TRACKMAXCACHE
, EBML_NONE
},
441 static EbmlSyntax matroska_tracks
[] = {
442 { MATROSKA_ID_TRACKENTRY
, EBML_NEST
, sizeof(MatroskaTrack
), offsetof(MatroskaDemuxContext
, tracks
), { .n
= matroska_track
} },
446 static EbmlSyntax matroska_attachment
[] = {
447 { MATROSKA_ID_FILEUID
, EBML_UINT
, 0, offsetof(MatroskaAttachment
, uid
) },
448 { MATROSKA_ID_FILENAME
, EBML_UTF8
, 0, offsetof(MatroskaAttachment
, filename
) },
449 { MATROSKA_ID_FILEMIMETYPE
, EBML_STR
, 0, offsetof(MatroskaAttachment
, mime
) },
450 { MATROSKA_ID_FILEDATA
, EBML_BIN
, 0, offsetof(MatroskaAttachment
, bin
) },
451 { MATROSKA_ID_FILEDESC
, EBML_NONE
},
455 static EbmlSyntax matroska_attachments
[] = {
456 { MATROSKA_ID_ATTACHEDFILE
, EBML_NEST
, sizeof(MatroskaAttachment
), offsetof(MatroskaDemuxContext
, attachments
), { .n
= matroska_attachment
} },
460 static EbmlSyntax matroska_chapter_display
[] = {
461 { MATROSKA_ID_CHAPSTRING
, EBML_UTF8
, 0, offsetof(MatroskaChapter
, title
) },
462 { MATROSKA_ID_CHAPLANG
, EBML_NONE
},
466 static EbmlSyntax matroska_chapter_entry
[] = {
467 { MATROSKA_ID_CHAPTERTIMESTART
, EBML_UINT
, 0, offsetof(MatroskaChapter
, start
), { .u
= AV_NOPTS_VALUE
} },
468 { MATROSKA_ID_CHAPTERTIMEEND
, EBML_UINT
, 0, offsetof(MatroskaChapter
, end
), { .u
= AV_NOPTS_VALUE
} },
469 { MATROSKA_ID_CHAPTERUID
, EBML_UINT
, 0, offsetof(MatroskaChapter
, uid
) },
470 { MATROSKA_ID_CHAPTERDISPLAY
, EBML_NEST
, 0, 0, { .n
= matroska_chapter_display
} },
471 { MATROSKA_ID_CHAPTERFLAGHIDDEN
, EBML_NONE
},
472 { MATROSKA_ID_CHAPTERFLAGENABLED
, EBML_NONE
},
473 { MATROSKA_ID_CHAPTERPHYSEQUIV
, EBML_NONE
},
474 { MATROSKA_ID_CHAPTERATOM
, EBML_NONE
},
478 static EbmlSyntax matroska_chapter
[] = {
479 { MATROSKA_ID_CHAPTERATOM
, EBML_NEST
, sizeof(MatroskaChapter
), offsetof(MatroskaDemuxContext
, chapters
), { .n
= matroska_chapter_entry
} },
480 { MATROSKA_ID_EDITIONUID
, EBML_NONE
},
481 { MATROSKA_ID_EDITIONFLAGHIDDEN
, EBML_NONE
},
482 { MATROSKA_ID_EDITIONFLAGDEFAULT
, EBML_NONE
},
483 { MATROSKA_ID_EDITIONFLAGORDERED
, EBML_NONE
},
487 static EbmlSyntax matroska_chapters
[] = {
488 { MATROSKA_ID_EDITIONENTRY
, EBML_NEST
, 0, 0, { .n
= matroska_chapter
} },
492 static EbmlSyntax matroska_index_pos
[] = {
493 { MATROSKA_ID_CUETRACK
, EBML_UINT
, 0, offsetof(MatroskaIndexPos
, track
) },
494 { MATROSKA_ID_CUECLUSTERPOSITION
, EBML_UINT
, 0, offsetof(MatroskaIndexPos
, pos
) },
495 { MATROSKA_ID_CUERELATIVEPOSITION
,EBML_NONE
},
496 { MATROSKA_ID_CUEDURATION
, EBML_NONE
},
497 { MATROSKA_ID_CUEBLOCKNUMBER
, EBML_NONE
},
501 static EbmlSyntax matroska_index_entry
[] = {
502 { MATROSKA_ID_CUETIME
, EBML_UINT
, 0, offsetof(MatroskaIndex
, time
) },
503 { MATROSKA_ID_CUETRACKPOSITION
, EBML_NEST
, sizeof(MatroskaIndexPos
), offsetof(MatroskaIndex
, pos
), { .n
= matroska_index_pos
} },
507 static EbmlSyntax matroska_index
[] = {
508 { MATROSKA_ID_POINTENTRY
, EBML_NEST
, sizeof(MatroskaIndex
), offsetof(MatroskaDemuxContext
, index
), { .n
= matroska_index_entry
} },
512 static EbmlSyntax matroska_simpletag
[] = {
513 { MATROSKA_ID_TAGNAME
, EBML_UTF8
, 0, offsetof(MatroskaTag
, name
) },
514 { MATROSKA_ID_TAGSTRING
, EBML_UTF8
, 0, offsetof(MatroskaTag
, string
) },
515 { MATROSKA_ID_TAGLANG
, EBML_STR
, 0, offsetof(MatroskaTag
, lang
), { .s
= "und" } },
516 { MATROSKA_ID_TAGDEFAULT
, EBML_UINT
, 0, offsetof(MatroskaTag
, def
) },
517 { MATROSKA_ID_TAGDEFAULT_BUG
, EBML_UINT
, 0, offsetof(MatroskaTag
, def
) },
518 { MATROSKA_ID_SIMPLETAG
, EBML_NEST
, sizeof(MatroskaTag
), offsetof(MatroskaTag
, sub
), { .n
= matroska_simpletag
} },
522 static EbmlSyntax matroska_tagtargets
[] = {
523 { MATROSKA_ID_TAGTARGETS_TYPE
, EBML_STR
, 0, offsetof(MatroskaTagTarget
, type
) },
524 { MATROSKA_ID_TAGTARGETS_TYPEVALUE
, EBML_UINT
, 0, offsetof(MatroskaTagTarget
, typevalue
), { .u
= 50 } },
525 { MATROSKA_ID_TAGTARGETS_TRACKUID
, EBML_UINT
, 0, offsetof(MatroskaTagTarget
, trackuid
) },
526 { MATROSKA_ID_TAGTARGETS_CHAPTERUID
, EBML_UINT
, 0, offsetof(MatroskaTagTarget
, chapteruid
) },
527 { MATROSKA_ID_TAGTARGETS_ATTACHUID
, EBML_UINT
, 0, offsetof(MatroskaTagTarget
, attachuid
) },
531 static EbmlSyntax matroska_tag
[] = {
532 { MATROSKA_ID_SIMPLETAG
, EBML_NEST
, sizeof(MatroskaTag
), offsetof(MatroskaTags
, tag
), { .n
= matroska_simpletag
} },
533 { MATROSKA_ID_TAGTARGETS
, EBML_NEST
, 0, offsetof(MatroskaTags
, target
), { .n
= matroska_tagtargets
} },
537 static EbmlSyntax matroska_tags
[] = {
538 { MATROSKA_ID_TAG
, EBML_NEST
, sizeof(MatroskaTags
), offsetof(MatroskaDemuxContext
, tags
), { .n
= matroska_tag
} },
542 static EbmlSyntax matroska_seekhead_entry
[] = {
543 { MATROSKA_ID_SEEKID
, EBML_UINT
, 0, offsetof(MatroskaSeekhead
, id
) },
544 { MATROSKA_ID_SEEKPOSITION
, EBML_UINT
, 0, offsetof(MatroskaSeekhead
, pos
), { .u
= -1 } },
548 static EbmlSyntax matroska_seekhead
[] = {
549 { MATROSKA_ID_SEEKENTRY
, EBML_NEST
, sizeof(MatroskaSeekhead
), offsetof(MatroskaDemuxContext
, seekhead
), { .n
= matroska_seekhead_entry
} },
553 static EbmlSyntax matroska_segment
[] = {
554 { MATROSKA_ID_INFO
, EBML_NEST
, 0, 0, { .n
= matroska_info
} },
555 { MATROSKA_ID_TRACKS
, EBML_NEST
, 0, 0, { .n
= matroska_tracks
} },
556 { MATROSKA_ID_ATTACHMENTS
, EBML_NEST
, 0, 0, { .n
= matroska_attachments
} },
557 { MATROSKA_ID_CHAPTERS
, EBML_NEST
, 0, 0, { .n
= matroska_chapters
} },
558 { MATROSKA_ID_CUES
, EBML_NEST
, 0, 0, { .n
= matroska_index
} },
559 { MATROSKA_ID_TAGS
, EBML_NEST
, 0, 0, { .n
= matroska_tags
} },
560 { MATROSKA_ID_SEEKHEAD
, EBML_NEST
, 0, 0, { .n
= matroska_seekhead
} },
561 { MATROSKA_ID_CLUSTER
, EBML_STOP
},
565 static EbmlSyntax matroska_segments
[] = {
566 { MATROSKA_ID_SEGMENT
, EBML_NEST
, 0, 0, { .n
= matroska_segment
} },
570 static EbmlSyntax matroska_blockmore
[] = {
571 { MATROSKA_ID_BLOCKADDID
, EBML_UINT
, 0, offsetof(MatroskaBlock
,additional_id
) },
572 { MATROSKA_ID_BLOCKADDITIONAL
, EBML_BIN
, 0, offsetof(MatroskaBlock
,additional
) },
576 static EbmlSyntax matroska_blockadditions
[] = {
577 { MATROSKA_ID_BLOCKMORE
, EBML_NEST
, 0, 0, {.n
= matroska_blockmore
} },
581 static EbmlSyntax matroska_blockgroup
[] = {
582 { MATROSKA_ID_BLOCK
, EBML_BIN
, 0, offsetof(MatroskaBlock
, bin
) },
583 { MATROSKA_ID_BLOCKADDITIONS
, EBML_NEST
, 0, 0, { .n
= matroska_blockadditions
} },
584 { MATROSKA_ID_SIMPLEBLOCK
, EBML_BIN
, 0, offsetof(MatroskaBlock
, bin
) },
585 { MATROSKA_ID_BLOCKDURATION
, EBML_UINT
, 0, offsetof(MatroskaBlock
, duration
) },
586 { MATROSKA_ID_DISCARDPADDING
, EBML_SINT
, 0, offsetof(MatroskaBlock
, discard_padding
) },
587 { MATROSKA_ID_BLOCKREFERENCE
, EBML_SINT
, 0, offsetof(MatroskaBlock
, reference
) },
588 { MATROSKA_ID_CODECSTATE
, EBML_NONE
},
589 { 1, EBML_UINT
, 0, offsetof(MatroskaBlock
, non_simple
), { .u
= 1 } },
593 static EbmlSyntax matroska_cluster
[] = {
594 { MATROSKA_ID_CLUSTERTIMECODE
, EBML_UINT
, 0, offsetof(MatroskaCluster
, timecode
) },
595 { MATROSKA_ID_BLOCKGROUP
, EBML_NEST
, sizeof(MatroskaBlock
), offsetof(MatroskaCluster
, blocks
), { .n
= matroska_blockgroup
} },
596 { MATROSKA_ID_SIMPLEBLOCK
, EBML_PASS
, sizeof(MatroskaBlock
), offsetof(MatroskaCluster
, blocks
), { .n
= matroska_blockgroup
} },
597 { MATROSKA_ID_CLUSTERPOSITION
, EBML_NONE
},
598 { MATROSKA_ID_CLUSTERPREVSIZE
, EBML_NONE
},
602 static EbmlSyntax matroska_clusters
[] = {
603 { MATROSKA_ID_CLUSTER
, EBML_NEST
, 0, 0, { .n
= matroska_cluster
} },
604 { MATROSKA_ID_INFO
, EBML_NONE
},
605 { MATROSKA_ID_CUES
, EBML_NONE
},
606 { MATROSKA_ID_TAGS
, EBML_NONE
},
607 { MATROSKA_ID_SEEKHEAD
, EBML_NONE
},
611 static EbmlSyntax matroska_cluster_incremental_parsing
[] = {
612 { MATROSKA_ID_CLUSTERTIMECODE
, EBML_UINT
, 0, offsetof(MatroskaCluster
, timecode
) },
613 { MATROSKA_ID_BLOCKGROUP
, EBML_NEST
, sizeof(MatroskaBlock
), offsetof(MatroskaCluster
, blocks
), { .n
= matroska_blockgroup
} },
614 { MATROSKA_ID_SIMPLEBLOCK
, EBML_PASS
, sizeof(MatroskaBlock
), offsetof(MatroskaCluster
, blocks
), { .n
= matroska_blockgroup
} },
615 { MATROSKA_ID_CLUSTERPOSITION
, EBML_NONE
},
616 { MATROSKA_ID_CLUSTERPREVSIZE
, EBML_NONE
},
617 { MATROSKA_ID_INFO
, EBML_NONE
},
618 { MATROSKA_ID_CUES
, EBML_NONE
},
619 { MATROSKA_ID_TAGS
, EBML_NONE
},
620 { MATROSKA_ID_SEEKHEAD
, EBML_NONE
},
621 { MATROSKA_ID_CLUSTER
, EBML_STOP
},
625 static EbmlSyntax matroska_cluster_incremental
[] = {
626 { MATROSKA_ID_CLUSTERTIMECODE
, EBML_UINT
, 0, offsetof(MatroskaCluster
, timecode
) },
627 { MATROSKA_ID_BLOCKGROUP
, EBML_STOP
},
628 { MATROSKA_ID_SIMPLEBLOCK
, EBML_STOP
},
629 { MATROSKA_ID_CLUSTERPOSITION
, EBML_NONE
},
630 { MATROSKA_ID_CLUSTERPREVSIZE
, EBML_NONE
},
634 static EbmlSyntax matroska_clusters_incremental
[] = {
635 { MATROSKA_ID_CLUSTER
, EBML_NEST
, 0, 0, { .n
= matroska_cluster_incremental
} },
636 { MATROSKA_ID_INFO
, EBML_NONE
},
637 { MATROSKA_ID_CUES
, EBML_NONE
},
638 { MATROSKA_ID_TAGS
, EBML_NONE
},
639 { MATROSKA_ID_SEEKHEAD
, EBML_NONE
},
643 static const char *const matroska_doctypes
[] = { "matroska", "webm" };
645 static int matroska_resync(MatroskaDemuxContext
*matroska
, int64_t last_pos
)
647 AVIOContext
*pb
= matroska
->ctx
->pb
;
649 matroska
->current_id
= 0;
650 matroska
->num_levels
= 0;
652 /* seek to next position to resync from */
653 if (avio_seek(pb
, last_pos
+ 1, SEEK_SET
) < 0)
658 // try to find a toplevel element
659 while (!avio_feof(pb
)) {
660 if (id
== MATROSKA_ID_INFO
|| id
== MATROSKA_ID_TRACKS
||
661 id
== MATROSKA_ID_CUES
|| id
== MATROSKA_ID_TAGS
||
662 id
== MATROSKA_ID_SEEKHEAD
|| id
== MATROSKA_ID_ATTACHMENTS
||
663 id
== MATROSKA_ID_CLUSTER
|| id
== MATROSKA_ID_CHAPTERS
) {
664 matroska
->current_id
= id
;
667 id
= (id
<< 8) | avio_r8(pb
);
676 * Return: Whether we reached the end of a level in the hierarchy or not.
678 static int ebml_level_end(MatroskaDemuxContext
*matroska
)
680 AVIOContext
*pb
= matroska
->ctx
->pb
;
681 int64_t pos
= avio_tell(pb
);
683 if (matroska
->num_levels
> 0) {
684 MatroskaLevel
*level
= &matroska
->levels
[matroska
->num_levels
- 1];
685 if (pos
- level
->start
>= level
->length
|| matroska
->current_id
) {
686 matroska
->num_levels
--;
694 * Read: an "EBML number", which is defined as a variable-length
695 * array of bytes. The first byte indicates the length by giving a
696 * number of 0-bits followed by a one. The position of the first
697 * "one" bit inside the first byte indicates the length of this
699 * Returns: number of bytes read, < 0 on error
701 static int ebml_read_num(MatroskaDemuxContext
*matroska
, AVIOContext
*pb
,
702 int max_size
, uint64_t *number
)
707 /* The first byte tells us the length in bytes - avio_r8() can normally
708 * return 0, but since that's not a valid first ebmlID byte, we can
709 * use it safely here to catch EOS. */
710 if (!(total
= avio_r8(pb
))) {
711 /* we might encounter EOS here */
712 if (!avio_feof(pb
)) {
713 int64_t pos
= avio_tell(pb
);
714 av_log(matroska
->ctx
, AV_LOG_ERROR
,
715 "Read error at pos. %"PRIu64
" (0x%"PRIx64
")\n",
717 return pb
->error
? pb
->error
: AVERROR(EIO
);
722 /* get the length of the EBML number */
723 read
= 8 - ff_log2_tab
[total
];
724 if (read
> max_size
) {
725 int64_t pos
= avio_tell(pb
) - 1;
726 av_log(matroska
->ctx
, AV_LOG_ERROR
,
727 "Invalid EBML number size tag 0x%02x at pos %"PRIu64
" (0x%"PRIx64
")\n",
728 (uint8_t) total
, pos
, pos
);
729 return AVERROR_INVALIDDATA
;
732 /* read out length */
733 total
^= 1 << ff_log2_tab
[total
];
735 total
= (total
<< 8) | avio_r8(pb
);
743 * Read a EBML length value.
744 * This needs special handling for the "unknown length" case which has multiple
747 static int ebml_read_length(MatroskaDemuxContext
*matroska
, AVIOContext
*pb
,
750 int res
= ebml_read_num(matroska
, pb
, 8, number
);
751 if (res
> 0 && *number
+ 1 == 1ULL << (7 * res
))
752 *number
= 0xffffffffffffffULL
;
757 * Read the next element as an unsigned int.
758 * 0 is success, < 0 is failure.
760 static int ebml_read_uint(AVIOContext
*pb
, int size
, uint64_t *num
)
765 return AVERROR_INVALIDDATA
;
767 /* big-endian ordering; build up number */
770 *num
= (*num
<< 8) | avio_r8(pb
);
776 * Read the next element as a signed int.
777 * 0 is success, < 0 is failure.
779 static int ebml_read_sint(AVIOContext
*pb
, int size
, int64_t *num
)
784 return AVERROR_INVALIDDATA
;
789 *num
= sign_extend(avio_r8(pb
), 8);
791 /* big-endian ordering; build up number */
793 *num
= (*num
<< 8) | avio_r8(pb
);
800 * Read the next element as a float.
801 * 0 is success, < 0 is failure.
803 static int ebml_read_float(AVIOContext
*pb
, int size
, double *num
)
808 *num
= av_int2float(avio_rb32(pb
));
810 *num
= av_int2double(avio_rb64(pb
));
812 return AVERROR_INVALIDDATA
;
818 * Read the next element as an ASCII string.
819 * 0 is success, < 0 is failure.
821 static int ebml_read_ascii(AVIOContext
*pb
, int size
, char **str
)
825 /* EBML strings are usually not 0-terminated, so we allocate one
826 * byte more, read the string and NULL-terminate it ourselves. */
827 if (!(res
= av_malloc(size
+ 1)))
828 return AVERROR(ENOMEM
);
829 if (avio_read(pb
, (uint8_t *) res
, size
) != size
) {
841 * Read the next element as binary data.
842 * 0 is success, < 0 is failure.
844 static int ebml_read_binary(AVIOContext
*pb
, int length
, EbmlBin
*bin
)
846 av_fast_padded_malloc(&bin
->data
, &bin
->size
, length
);
848 return AVERROR(ENOMEM
);
851 bin
->pos
= avio_tell(pb
);
852 if (avio_read(pb
, bin
->data
, length
) != length
) {
853 av_freep(&bin
->data
);
862 * Read the next element, but only the header. The contents
863 * are supposed to be sub-elements which can be read separately.
864 * 0 is success, < 0 is failure.
866 static int ebml_read_master(MatroskaDemuxContext
*matroska
, uint64_t length
)
868 AVIOContext
*pb
= matroska
->ctx
->pb
;
869 MatroskaLevel
*level
;
871 if (matroska
->num_levels
>= EBML_MAX_DEPTH
) {
872 av_log(matroska
->ctx
, AV_LOG_ERROR
,
873 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH
);
874 return AVERROR(ENOSYS
);
877 level
= &matroska
->levels
[matroska
->num_levels
++];
878 level
->start
= avio_tell(pb
);
879 level
->length
= length
;
885 * Read signed/unsigned "EBML" numbers.
886 * Return: number of bytes processed, < 0 on error
888 static int matroska_ebmlnum_uint(MatroskaDemuxContext
*matroska
,
889 uint8_t *data
, uint32_t size
, uint64_t *num
)
892 ffio_init_context(&pb
, data
, size
, 0, NULL
, NULL
, NULL
, NULL
);
893 return ebml_read_num(matroska
, &pb
, FFMIN(size
, 8), num
);
897 * Same as above, but signed.
899 static int matroska_ebmlnum_sint(MatroskaDemuxContext
*matroska
,
900 uint8_t *data
, uint32_t size
, int64_t *num
)
905 /* read as unsigned number first */
906 if ((res
= matroska_ebmlnum_uint(matroska
, data
, size
, &unum
)) < 0)
909 /* make signed (weird way) */
910 *num
= unum
- ((1LL << (7 * res
- 1)) - 1);
915 static int ebml_parse_elem(MatroskaDemuxContext
*matroska
,
916 EbmlSyntax
*syntax
, void *data
);
918 static int ebml_parse_id(MatroskaDemuxContext
*matroska
, EbmlSyntax
*syntax
,
919 uint32_t id
, void *data
)
922 for (i
= 0; syntax
[i
].id
; i
++)
923 if (id
== syntax
[i
].id
)
925 if (!syntax
[i
].id
&& id
== MATROSKA_ID_CLUSTER
&&
926 matroska
->num_levels
> 0 &&
927 matroska
->levels
[matroska
->num_levels
- 1].length
== 0xffffffffffffff)
928 return 0; // we reached the end of an unknown size cluster
929 if (!syntax
[i
].id
&& id
!= EBML_ID_VOID
&& id
!= EBML_ID_CRC32
) {
930 av_log(matroska
->ctx
, AV_LOG_INFO
, "Unknown entry 0x%"PRIX32
"\n", id
);
931 if (matroska
->ctx
->error_recognition
& AV_EF_EXPLODE
)
932 return AVERROR_INVALIDDATA
;
934 return ebml_parse_elem(matroska
, &syntax
[i
], data
);
937 static int ebml_parse(MatroskaDemuxContext
*matroska
, EbmlSyntax
*syntax
,
940 if (!matroska
->current_id
) {
942 int res
= ebml_read_num(matroska
, matroska
->ctx
->pb
, 4, &id
);
945 matroska
->current_id
= id
| 1 << 7 * res
;
947 return ebml_parse_id(matroska
, syntax
, matroska
->current_id
, data
);
950 static int ebml_parse_nest(MatroskaDemuxContext
*matroska
, EbmlSyntax
*syntax
,
955 for (i
= 0; syntax
[i
].id
; i
++)
956 switch (syntax
[i
].type
) {
958 *(uint64_t *) ((char *) data
+ syntax
[i
].data_offset
) = syntax
[i
].def
.u
;
961 *(double *) ((char *) data
+ syntax
[i
].data_offset
) = syntax
[i
].def
.f
;
965 // the default may be NULL
966 if (syntax
[i
].def
.s
) {
967 uint8_t **dst
= (uint8_t **) ((uint8_t *) data
+ syntax
[i
].data_offset
);
968 *dst
= av_strdup(syntax
[i
].def
.s
);
970 return AVERROR(ENOMEM
);
975 while (!res
&& !ebml_level_end(matroska
))
976 res
= ebml_parse(matroska
, syntax
, data
);
981 static int ebml_parse_elem(MatroskaDemuxContext
*matroska
,
982 EbmlSyntax
*syntax
, void *data
)
984 static const uint64_t max_lengths
[EBML_TYPE_COUNT
] = {
987 // max. 16 MB for strings
988 [EBML_STR
] = 0x1000000,
989 [EBML_UTF8
] = 0x1000000,
990 // max. 256 MB for binary data
991 [EBML_BIN
] = 0x10000000,
992 // no limits for anything else
994 AVIOContext
*pb
= matroska
->ctx
->pb
;
995 uint32_t id
= syntax
->id
;
1000 data
= (char *) data
+ syntax
->data_offset
;
1001 if (syntax
->list_elem_size
) {
1002 EbmlList
*list
= data
;
1003 newelem
= av_realloc_array(list
->elem
, list
->nb_elem
+ 1, syntax
->list_elem_size
);
1005 return AVERROR(ENOMEM
);
1006 list
->elem
= newelem
;
1007 data
= (char *) list
->elem
+ list
->nb_elem
* syntax
->list_elem_size
;
1008 memset(data
, 0, syntax
->list_elem_size
);
1012 if (syntax
->type
!= EBML_PASS
&& syntax
->type
!= EBML_STOP
) {
1013 matroska
->current_id
= 0;
1014 if ((res
= ebml_read_length(matroska
, pb
, &length
)) < 0)
1016 if (max_lengths
[syntax
->type
] && length
> max_lengths
[syntax
->type
]) {
1017 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1018 "Invalid length 0x%"PRIx64
" > 0x%"PRIx64
" for syntax element %i\n",
1019 length
, max_lengths
[syntax
->type
], syntax
->type
);
1020 return AVERROR_INVALIDDATA
;
1024 switch (syntax
->type
) {
1026 res
= ebml_read_uint(pb
, length
, data
);
1029 res
= ebml_read_sint(pb
, length
, data
);
1032 res
= ebml_read_float(pb
, length
, data
);
1036 res
= ebml_read_ascii(pb
, length
, data
);
1039 res
= ebml_read_binary(pb
, length
, data
);
1042 if ((res
= ebml_read_master(matroska
, length
)) < 0)
1044 if (id
== MATROSKA_ID_SEGMENT
)
1045 matroska
->segment_start
= avio_tell(matroska
->ctx
->pb
);
1046 return ebml_parse_nest(matroska
, syntax
->def
.n
, data
);
1048 return ebml_parse_id(matroska
, syntax
->def
.n
, id
, data
);
1052 if (ffio_limit(pb
, length
) != length
)
1053 return AVERROR(EIO
);
1054 return avio_skip(pb
, length
) < 0 ? AVERROR(EIO
) : 0;
1056 if (res
== AVERROR_INVALIDDATA
)
1057 av_log(matroska
->ctx
, AV_LOG_ERROR
, "Invalid element\n");
1058 else if (res
== AVERROR(EIO
))
1059 av_log(matroska
->ctx
, AV_LOG_ERROR
, "Read error\n");
1063 static void ebml_free(EbmlSyntax
*syntax
, void *data
)
1066 for (i
= 0; syntax
[i
].id
; i
++) {
1067 void *data_off
= (char *) data
+ syntax
[i
].data_offset
;
1068 switch (syntax
[i
].type
) {
1074 av_freep(&((EbmlBin
*) data_off
)->data
);
1077 if (syntax
[i
].list_elem_size
) {
1078 EbmlList
*list
= data_off
;
1079 char *ptr
= list
->elem
;
1080 for (j
= 0; j
< list
->nb_elem
;
1081 j
++, ptr
+= syntax
[i
].list_elem_size
)
1082 ebml_free(syntax
[i
].def
.n
, ptr
);
1083 av_freep(&list
->elem
);
1085 ebml_free(syntax
[i
].def
.n
, data_off
);
1095 static int matroska_probe(AVProbeData
*p
)
1098 int len_mask
= 0x80, size
= 1, n
= 1, i
;
1101 if (AV_RB32(p
->buf
) != EBML_ID_HEADER
)
1104 /* length of header */
1106 while (size
<= 8 && !(total
& len_mask
)) {
1112 total
&= (len_mask
- 1);
1114 total
= (total
<< 8) | p
->buf
[4 + n
++];
1116 /* Does the probe data contain the whole header? */
1117 if (p
->buf_size
< 4 + size
+ total
)
1120 /* The header should contain a known document type. For now,
1121 * we don't parse the whole header but simply check for the
1122 * availability of that array of characters inside the header.
1123 * Not fully fool-proof, but good enough. */
1124 for (i
= 0; i
< FF_ARRAY_ELEMS(matroska_doctypes
); i
++) {
1125 int probelen
= strlen(matroska_doctypes
[i
]);
1126 if (total
< probelen
)
1128 for (n
= 4 + size
; n
<= 4 + size
+ total
- probelen
; n
++)
1129 if (!memcmp(p
->buf
+ n
, matroska_doctypes
[i
], probelen
))
1130 return AVPROBE_SCORE_MAX
;
1133 // probably valid EBML header but no recognized doctype
1134 return AVPROBE_SCORE_EXTENSION
;
1137 static MatroskaTrack
*matroska_find_track_by_num(MatroskaDemuxContext
*matroska
,
1140 MatroskaTrack
*tracks
= matroska
->tracks
.elem
;
1143 for (i
= 0; i
< matroska
->tracks
.nb_elem
; i
++)
1144 if (tracks
[i
].num
== num
)
1147 av_log(matroska
->ctx
, AV_LOG_ERROR
, "Invalid track number %d\n", num
);
1151 static int matroska_decode_buffer(uint8_t **buf
, int *buf_size
,
1152 MatroskaTrack
*track
)
1154 MatroskaTrackEncoding
*encodings
= track
->encodings
.elem
;
1155 uint8_t *data
= *buf
;
1156 int isize
= *buf_size
;
1157 uint8_t *pkt_data
= NULL
;
1158 uint8_t av_unused
*newpktdata
;
1159 int pkt_size
= isize
;
1163 if (pkt_size
>= 10000000U)
1164 return AVERROR_INVALIDDATA
;
1166 switch (encodings
[0].compression
.algo
) {
1167 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP
:
1169 int header_size
= encodings
[0].compression
.settings
.size
;
1170 uint8_t *header
= encodings
[0].compression
.settings
.data
;
1172 if (header_size
&& !header
) {
1173 av_log(NULL
, AV_LOG_ERROR
, "Compression size but no data in headerstrip\n");
1180 pkt_size
= isize
+ header_size
;
1181 pkt_data
= av_malloc(pkt_size
);
1183 return AVERROR(ENOMEM
);
1185 memcpy(pkt_data
, header
, header_size
);
1186 memcpy(pkt_data
+ header_size
, data
, isize
);
1190 case MATROSKA_TRACK_ENCODING_COMP_LZO
:
1192 olen
= pkt_size
*= 3;
1193 newpktdata
= av_realloc(pkt_data
, pkt_size
+ AV_LZO_OUTPUT_PADDING
);
1195 result
= AVERROR(ENOMEM
);
1198 pkt_data
= newpktdata
;
1199 result
= av_lzo1x_decode(pkt_data
, &olen
, data
, &isize
);
1200 } while (result
== AV_LZO_OUTPUT_FULL
&& pkt_size
< 10000000);
1202 result
= AVERROR_INVALIDDATA
;
1209 case MATROSKA_TRACK_ENCODING_COMP_ZLIB
:
1211 z_stream zstream
= { 0 };
1212 if (inflateInit(&zstream
) != Z_OK
)
1214 zstream
.next_in
= data
;
1215 zstream
.avail_in
= isize
;
1218 newpktdata
= av_realloc(pkt_data
, pkt_size
);
1220 inflateEnd(&zstream
);
1223 pkt_data
= newpktdata
;
1224 zstream
.avail_out
= pkt_size
- zstream
.total_out
;
1225 zstream
.next_out
= pkt_data
+ zstream
.total_out
;
1227 result
= inflate(&zstream
, Z_NO_FLUSH
);
1229 result
= Z_MEM_ERROR
;
1230 } while (result
== Z_OK
&& pkt_size
< 10000000);
1231 pkt_size
= zstream
.total_out
;
1232 inflateEnd(&zstream
);
1233 if (result
!= Z_STREAM_END
) {
1234 if (result
== Z_MEM_ERROR
)
1235 result
= AVERROR(ENOMEM
);
1237 result
= AVERROR_INVALIDDATA
;
1244 case MATROSKA_TRACK_ENCODING_COMP_BZLIB
:
1246 bz_stream bzstream
= { 0 };
1247 if (BZ2_bzDecompressInit(&bzstream
, 0, 0) != BZ_OK
)
1249 bzstream
.next_in
= data
;
1250 bzstream
.avail_in
= isize
;
1253 newpktdata
= av_realloc(pkt_data
, pkt_size
);
1255 BZ2_bzDecompressEnd(&bzstream
);
1258 pkt_data
= newpktdata
;
1259 bzstream
.avail_out
= pkt_size
- bzstream
.total_out_lo32
;
1260 bzstream
.next_out
= pkt_data
+ bzstream
.total_out_lo32
;
1262 result
= BZ2_bzDecompress(&bzstream
);
1264 result
= BZ_MEM_ERROR
;
1265 } while (result
== BZ_OK
&& pkt_size
< 10000000);
1266 pkt_size
= bzstream
.total_out_lo32
;
1267 BZ2_bzDecompressEnd(&bzstream
);
1268 if (result
!= BZ_STREAM_END
) {
1269 if (result
== BZ_MEM_ERROR
)
1270 result
= AVERROR(ENOMEM
);
1272 result
= AVERROR_INVALIDDATA
;
1279 return AVERROR_INVALIDDATA
;
1283 *buf_size
= pkt_size
;
1291 static void matroska_convert_tag(AVFormatContext
*s
, EbmlList
*list
,
1292 AVDictionary
**metadata
, char *prefix
)
1294 MatroskaTag
*tags
= list
->elem
;
1298 for (i
= 0; i
< list
->nb_elem
; i
++) {
1299 const char *lang
= tags
[i
].lang
&&
1300 strcmp(tags
[i
].lang
, "und") ? tags
[i
].lang
: NULL
;
1302 if (!tags
[i
].name
) {
1303 av_log(s
, AV_LOG_WARNING
, "Skipping invalid tag with no TagName.\n");
1307 snprintf(key
, sizeof(key
), "%s/%s", prefix
, tags
[i
].name
);
1309 av_strlcpy(key
, tags
[i
].name
, sizeof(key
));
1310 if (tags
[i
].def
|| !lang
) {
1311 av_dict_set(metadata
, key
, tags
[i
].string
, 0);
1312 if (tags
[i
].sub
.nb_elem
)
1313 matroska_convert_tag(s
, &tags
[i
].sub
, metadata
, key
);
1316 av_strlcat(key
, "-", sizeof(key
));
1317 av_strlcat(key
, lang
, sizeof(key
));
1318 av_dict_set(metadata
, key
, tags
[i
].string
, 0);
1319 if (tags
[i
].sub
.nb_elem
)
1320 matroska_convert_tag(s
, &tags
[i
].sub
, metadata
, key
);
1323 ff_metadata_conv(metadata
, NULL
, ff_mkv_metadata_conv
);
1326 static void matroska_convert_tags(AVFormatContext
*s
)
1328 MatroskaDemuxContext
*matroska
= s
->priv_data
;
1329 MatroskaTags
*tags
= matroska
->tags
.elem
;
1332 for (i
= 0; i
< matroska
->tags
.nb_elem
; i
++) {
1333 if (tags
[i
].target
.attachuid
) {
1334 MatroskaAttachment
*attachment
= matroska
->attachments
.elem
;
1335 for (j
= 0; j
< matroska
->attachments
.nb_elem
; j
++)
1336 if (attachment
[j
].uid
== tags
[i
].target
.attachuid
&&
1337 attachment
[j
].stream
)
1338 matroska_convert_tag(s
, &tags
[i
].tag
,
1339 &attachment
[j
].stream
->metadata
, NULL
);
1340 } else if (tags
[i
].target
.chapteruid
) {
1341 MatroskaChapter
*chapter
= matroska
->chapters
.elem
;
1342 for (j
= 0; j
< matroska
->chapters
.nb_elem
; j
++)
1343 if (chapter
[j
].uid
== tags
[i
].target
.chapteruid
&&
1345 matroska_convert_tag(s
, &tags
[i
].tag
,
1346 &chapter
[j
].chapter
->metadata
, NULL
);
1347 } else if (tags
[i
].target
.trackuid
) {
1348 MatroskaTrack
*track
= matroska
->tracks
.elem
;
1349 for (j
= 0; j
< matroska
->tracks
.nb_elem
; j
++)
1350 if (track
[j
].uid
== tags
[i
].target
.trackuid
&& track
[j
].stream
)
1351 matroska_convert_tag(s
, &tags
[i
].tag
,
1352 &track
[j
].stream
->metadata
, NULL
);
1354 matroska_convert_tag(s
, &tags
[i
].tag
, &s
->metadata
,
1355 tags
[i
].target
.type
);
1360 static int matroska_parse_seekhead_entry(MatroskaDemuxContext
*matroska
,
1363 EbmlList
*seekhead_list
= &matroska
->seekhead
;
1364 uint32_t level_up
= matroska
->level_up
;
1365 uint32_t saved_id
= matroska
->current_id
;
1366 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
1367 int64_t before_pos
= avio_tell(matroska
->ctx
->pb
);
1368 MatroskaLevel level
;
1372 if (idx
>= seekhead_list
->nb_elem
||
1373 seekhead
[idx
].id
== MATROSKA_ID_SEEKHEAD
||
1374 seekhead
[idx
].id
== MATROSKA_ID_CLUSTER
)
1378 offset
= seekhead
[idx
].pos
+ matroska
->segment_start
;
1379 if (avio_seek(matroska
->ctx
->pb
, offset
, SEEK_SET
) == offset
) {
1380 /* We don't want to lose our seekhead level, so we add
1381 * a dummy. This is a crude hack. */
1382 if (matroska
->num_levels
== EBML_MAX_DEPTH
) {
1383 av_log(matroska
->ctx
, AV_LOG_INFO
,
1384 "Max EBML element depth (%d) reached, "
1385 "cannot parse further.\n", EBML_MAX_DEPTH
);
1386 ret
= AVERROR_INVALIDDATA
;
1389 level
.length
= (uint64_t) -1;
1390 matroska
->levels
[matroska
->num_levels
] = level
;
1391 matroska
->num_levels
++;
1392 matroska
->current_id
= 0;
1394 ret
= ebml_parse(matroska
, matroska_segment
, matroska
);
1396 /* remove dummy level */
1397 while (matroska
->num_levels
) {
1398 uint64_t length
= matroska
->levels
[--matroska
->num_levels
].length
;
1399 if (length
== (uint64_t) -1)
1405 avio_seek(matroska
->ctx
->pb
, before_pos
, SEEK_SET
);
1406 matroska
->level_up
= level_up
;
1407 matroska
->current_id
= saved_id
;
1412 static void matroska_execute_seekhead(MatroskaDemuxContext
*matroska
)
1414 EbmlList
*seekhead_list
= &matroska
->seekhead
;
1415 int64_t before_pos
= avio_tell(matroska
->ctx
->pb
);
1419 // we should not do any seeking in the streaming case
1420 if (!matroska
->ctx
->pb
->seekable
||
1421 (matroska
->ctx
->flags
& AVFMT_FLAG_IGNIDX
))
1424 // do not read entries that are added while parsing seekhead entries
1425 nb_elem
= seekhead_list
->nb_elem
;
1427 for (i
= 0; i
< nb_elem
; i
++) {
1428 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
1429 if (seekhead
[i
].pos
<= before_pos
)
1432 // defer cues parsing until we actually need cue data.
1433 if (seekhead
[i
].id
== MATROSKA_ID_CUES
) {
1434 matroska
->cues_parsing_deferred
= 1;
1438 if (matroska_parse_seekhead_entry(matroska
, i
) < 0) {
1439 // mark index as broken
1440 matroska
->cues_parsing_deferred
= -1;
1446 static void matroska_add_index_entries(MatroskaDemuxContext
*matroska
)
1448 EbmlList
*index_list
;
1449 MatroskaIndex
*index
;
1450 int index_scale
= 1;
1453 index_list
= &matroska
->index
;
1454 index
= index_list
->elem
;
1455 if (index_list
->nb_elem
&&
1456 index
[0].time
> 1E14
/ matroska
->time_scale
) {
1457 av_log(matroska
->ctx
, AV_LOG_WARNING
, "Working around broken index.\n");
1458 index_scale
= matroska
->time_scale
;
1460 for (i
= 0; i
< index_list
->nb_elem
; i
++) {
1461 EbmlList
*pos_list
= &index
[i
].pos
;
1462 MatroskaIndexPos
*pos
= pos_list
->elem
;
1463 for (j
= 0; j
< pos_list
->nb_elem
; j
++) {
1464 MatroskaTrack
*track
= matroska_find_track_by_num(matroska
,
1466 if (track
&& track
->stream
)
1467 av_add_index_entry(track
->stream
,
1468 pos
[j
].pos
+ matroska
->segment_start
,
1469 index
[i
].time
/ index_scale
, 0, 0,
1475 static void matroska_parse_cues(MatroskaDemuxContext
*matroska
) {
1476 EbmlList
*seekhead_list
= &matroska
->seekhead
;
1477 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
1480 for (i
= 0; i
< seekhead_list
->nb_elem
; i
++)
1481 if (seekhead
[i
].id
== MATROSKA_ID_CUES
)
1483 av_assert1(i
<= seekhead_list
->nb_elem
);
1485 if (matroska_parse_seekhead_entry(matroska
, i
) < 0)
1486 matroska
->cues_parsing_deferred
= -1;
1487 matroska_add_index_entries(matroska
);
1490 static int matroska_aac_profile(char *codec_id
)
1492 static const char *const aac_profiles
[] = { "MAIN", "LC", "SSR" };
1495 for (profile
= 0; profile
< FF_ARRAY_ELEMS(aac_profiles
); profile
++)
1496 if (strstr(codec_id
, aac_profiles
[profile
]))
1501 static int matroska_aac_sri(int samplerate
)
1505 for (sri
= 0; sri
< FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates
); sri
++)
1506 if (avpriv_mpeg4audio_sample_rates
[sri
] == samplerate
)
1511 static void matroska_metadata_creation_time(AVDictionary
**metadata
, int64_t date_utc
)
1514 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1515 time_t creation_time
= date_utc
/ 1000000000 + 978307200;
1516 struct tm tmpbuf
, *ptm
= gmtime_r(&creation_time
, &tmpbuf
);
1518 if (strftime(buffer
, sizeof(buffer
), "%Y-%m-%d %H:%M:%S", ptm
))
1519 av_dict_set(metadata
, "creation_time", buffer
, 0);
1522 static int matroska_parse_flac(AVFormatContext
*s
,
1523 MatroskaTrack
*track
,
1526 AVStream
*st
= track
->stream
;
1527 uint8_t *p
= track
->codec_priv
.data
;
1528 int size
= track
->codec_priv
.size
;
1530 if (size
< 8 + FLAC_STREAMINFO_SIZE
|| p
[4] & 0x7f) {
1531 av_log(s
, AV_LOG_WARNING
, "Invalid FLAC private data\n");
1532 track
->codec_priv
.size
= 0;
1536 track
->codec_priv
.size
= 8 + FLAC_STREAMINFO_SIZE
;
1538 p
+= track
->codec_priv
.size
;
1539 size
-= track
->codec_priv
.size
;
1541 /* parse the remaining metadata blocks if present */
1543 int block_last
, block_type
, block_size
;
1545 flac_parse_block_header(p
, &block_last
, &block_type
, &block_size
);
1549 if (block_size
> size
)
1552 /* check for the channel mask */
1553 if (block_type
== FLAC_METADATA_TYPE_VORBIS_COMMENT
) {
1554 AVDictionary
*dict
= NULL
;
1555 AVDictionaryEntry
*chmask
;
1557 ff_vorbis_comment(s
, &dict
, p
, block_size
, 0);
1558 chmask
= av_dict_get(dict
, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL
, 0);
1560 uint64_t mask
= strtol(chmask
->value
, NULL
, 0);
1561 if (!mask
|| mask
& ~0x3ffffULL
) {
1562 av_log(s
, AV_LOG_WARNING
,
1563 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1565 st
->codec
->channel_layout
= mask
;
1567 av_dict_free(&dict
);
1577 static int matroska_parse_tracks(AVFormatContext
*s
)
1579 MatroskaDemuxContext
*matroska
= s
->priv_data
;
1580 MatroskaTrack
*tracks
= matroska
->tracks
.elem
;
1585 for (i
= 0; i
< matroska
->tracks
.nb_elem
; i
++) {
1586 MatroskaTrack
*track
= &tracks
[i
];
1587 enum AVCodecID codec_id
= AV_CODEC_ID_NONE
;
1588 EbmlList
*encodings_list
= &track
->encodings
;
1589 MatroskaTrackEncoding
*encodings
= encodings_list
->elem
;
1590 uint8_t *extradata
= NULL
;
1591 int extradata_size
= 0;
1592 int extradata_offset
= 0;
1593 uint32_t fourcc
= 0;
1595 char* key_id_base64
= NULL
;
1598 /* Apply some sanity checks. */
1599 if (track
->type
!= MATROSKA_TRACK_TYPE_VIDEO
&&
1600 track
->type
!= MATROSKA_TRACK_TYPE_AUDIO
&&
1601 track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
&&
1602 track
->type
!= MATROSKA_TRACK_TYPE_METADATA
) {
1603 av_log(matroska
->ctx
, AV_LOG_INFO
,
1604 "Unknown or unsupported track type %"PRIu64
"\n",
1608 if (!track
->codec_id
)
1611 if (track
->type
== MATROSKA_TRACK_TYPE_VIDEO
) {
1612 if (!track
->default_duration
&& track
->video
.frame_rate
> 0)
1613 track
->default_duration
= 1000000000 / track
->video
.frame_rate
;
1614 if (track
->video
.display_width
== -1)
1615 track
->video
.display_width
= track
->video
.pixel_width
;
1616 if (track
->video
.display_height
== -1)
1617 track
->video
.display_height
= track
->video
.pixel_height
;
1618 if (track
->video
.color_space
.size
== 4)
1619 fourcc
= AV_RL32(track
->video
.color_space
.data
);
1620 } else if (track
->type
== MATROSKA_TRACK_TYPE_AUDIO
) {
1621 if (!track
->audio
.out_samplerate
)
1622 track
->audio
.out_samplerate
= track
->audio
.samplerate
;
1624 if (encodings_list
->nb_elem
> 1) {
1625 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1626 "Multiple combined encodings not supported");
1627 } else if (encodings_list
->nb_elem
== 1) {
1628 if (encodings
[0].type
) {
1629 if (encodings
[0].encryption
.key_id
.size
> 0) {
1630 /* Save the encryption key id to be stored later as a
1632 const int b64_size
= AV_BASE64_SIZE(encodings
[0].encryption
.key_id
.size
);
1633 key_id_base64
= av_malloc(b64_size
);
1634 if (key_id_base64
== NULL
)
1635 return AVERROR(ENOMEM
);
1637 av_base64_encode(key_id_base64
, b64_size
,
1638 encodings
[0].encryption
.key_id
.data
,
1639 encodings
[0].encryption
.key_id
.size
);
1641 encodings
[0].scope
= 0;
1642 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1643 "Unsupported encoding type");
1647 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_ZLIB
&&
1650 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_BZLIB
&&
1653 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_LZO
&&
1655 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP
) {
1656 encodings
[0].scope
= 0;
1657 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1658 "Unsupported encoding type");
1659 } else if (track
->codec_priv
.size
&& encodings
[0].scope
& 2) {
1660 uint8_t *codec_priv
= track
->codec_priv
.data
;
1661 int ret
= matroska_decode_buffer(&track
->codec_priv
.data
,
1662 &track
->codec_priv
.size
,
1665 track
->codec_priv
.data
= NULL
;
1666 track
->codec_priv
.size
= 0;
1667 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1668 "Failed to decode codec private data\n");
1671 if (codec_priv
!= track
->codec_priv
.data
)
1672 av_free(codec_priv
);
1676 for (j
= 0; ff_mkv_codec_tags
[j
].id
!= AV_CODEC_ID_NONE
; j
++) {
1677 if (!strncmp(ff_mkv_codec_tags
[j
].str
, track
->codec_id
,
1678 strlen(ff_mkv_codec_tags
[j
].str
))) {
1679 codec_id
= ff_mkv_codec_tags
[j
].id
;
1684 st
= track
->stream
= avformat_new_stream(s
, NULL
);
1686 av_free(key_id_base64
);
1687 return AVERROR(ENOMEM
);
1690 if (key_id_base64
) {
1691 /* export encryption key id as base64 metadata tag */
1692 av_dict_set(&st
->metadata
, "enc_key_id", key_id_base64
, 0);
1693 av_freep(&key_id_base64
);
1696 if (!strcmp(track
->codec_id
, "V_MS/VFW/FOURCC") &&
1697 track
->codec_priv
.size
>= 40 &&
1698 track
->codec_priv
.data
) {
1699 track
->ms_compat
= 1;
1700 bit_depth
= AV_RL16(track
->codec_priv
.data
+ 14);
1701 fourcc
= AV_RL32(track
->codec_priv
.data
+ 16);
1702 codec_id
= ff_codec_get_id(ff_codec_bmp_tags
,
1705 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
,
1707 extradata_offset
= 40;
1708 } else if (!strcmp(track
->codec_id
, "A_MS/ACM") &&
1709 track
->codec_priv
.size
>= 14 &&
1710 track
->codec_priv
.data
) {
1712 ffio_init_context(&b
, track
->codec_priv
.data
,
1713 track
->codec_priv
.size
,
1714 0, NULL
, NULL
, NULL
, NULL
);
1715 ret
= ff_get_wav_header(&b
, st
->codec
, track
->codec_priv
.size
);
1718 codec_id
= st
->codec
->codec_id
;
1719 extradata_offset
= FFMIN(track
->codec_priv
.size
, 18);
1720 } else if (!strcmp(track
->codec_id
, "A_QUICKTIME")
1721 && (track
->codec_priv
.size
>= 86)
1722 && (track
->codec_priv
.data
)) {
1723 fourcc
= AV_RL32(track
->codec_priv
.data
+ 4);
1724 codec_id
= ff_codec_get_id(ff_codec_movaudio_tags
, fourcc
);
1725 if (ff_codec_get_id(ff_codec_movaudio_tags
, AV_RL32(track
->codec_priv
.data
))) {
1726 fourcc
= AV_RL32(track
->codec_priv
.data
);
1727 codec_id
= ff_codec_get_id(ff_codec_movaudio_tags
, fourcc
);
1729 } else if (!strcmp(track
->codec_id
, "V_QUICKTIME") &&
1730 (track
->codec_priv
.size
>= 21) &&
1731 (track
->codec_priv
.data
)) {
1732 fourcc
= AV_RL32(track
->codec_priv
.data
+ 4);
1733 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
, fourcc
);
1734 if (ff_codec_get_id(ff_codec_movvideo_tags
, AV_RL32(track
->codec_priv
.data
))) {
1735 fourcc
= AV_RL32(track
->codec_priv
.data
);
1736 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
, fourcc
);
1738 if (codec_id
== AV_CODEC_ID_NONE
&& AV_RL32(track
->codec_priv
.data
+4) == AV_RL32("SMI "))
1739 codec_id
= AV_CODEC_ID_SVQ3
;
1740 } else if (codec_id
== AV_CODEC_ID_PCM_S16BE
) {
1741 switch (track
->audio
.bitdepth
) {
1743 codec_id
= AV_CODEC_ID_PCM_U8
;
1746 codec_id
= AV_CODEC_ID_PCM_S24BE
;
1749 codec_id
= AV_CODEC_ID_PCM_S32BE
;
1752 } else if (codec_id
== AV_CODEC_ID_PCM_S16LE
) {
1753 switch (track
->audio
.bitdepth
) {
1755 codec_id
= AV_CODEC_ID_PCM_U8
;
1758 codec_id
= AV_CODEC_ID_PCM_S24LE
;
1761 codec_id
= AV_CODEC_ID_PCM_S32LE
;
1764 } else if (codec_id
== AV_CODEC_ID_PCM_F32LE
&&
1765 track
->audio
.bitdepth
== 64) {
1766 codec_id
= AV_CODEC_ID_PCM_F64LE
;
1767 } else if (codec_id
== AV_CODEC_ID_AAC
&& !track
->codec_priv
.size
) {
1768 int profile
= matroska_aac_profile(track
->codec_id
);
1769 int sri
= matroska_aac_sri(track
->audio
.samplerate
);
1770 extradata
= av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE
);
1772 return AVERROR(ENOMEM
);
1773 extradata
[0] = (profile
<< 3) | ((sri
& 0x0E) >> 1);
1774 extradata
[1] = ((sri
& 0x01) << 7) | (track
->audio
.channels
<< 3);
1775 if (strstr(track
->codec_id
, "SBR")) {
1776 sri
= matroska_aac_sri(track
->audio
.out_samplerate
);
1777 extradata
[2] = 0x56;
1778 extradata
[3] = 0xE5;
1779 extradata
[4] = 0x80 | (sri
<< 3);
1783 } else if (codec_id
== AV_CODEC_ID_ALAC
&& track
->codec_priv
.size
&& track
->codec_priv
.size
< INT_MAX
- 12 - FF_INPUT_BUFFER_PADDING_SIZE
) {
1784 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1785 * Create the "atom size", "tag", and "tag version" fields the
1786 * decoder expects manually. */
1787 extradata_size
= 12 + track
->codec_priv
.size
;
1788 extradata
= av_mallocz(extradata_size
+
1789 FF_INPUT_BUFFER_PADDING_SIZE
);
1791 return AVERROR(ENOMEM
);
1792 AV_WB32(extradata
, extradata_size
);
1793 memcpy(&extradata
[4], "alac", 4);
1794 AV_WB32(&extradata
[8], 0);
1795 memcpy(&extradata
[12], track
->codec_priv
.data
,
1796 track
->codec_priv
.size
);
1797 } else if (codec_id
== AV_CODEC_ID_TTA
) {
1798 extradata_size
= 30;
1799 extradata
= av_mallocz(extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
1801 return AVERROR(ENOMEM
);
1802 ffio_init_context(&b
, extradata
, extradata_size
, 1,
1803 NULL
, NULL
, NULL
, NULL
);
1804 avio_write(&b
, "TTA1", 4);
1806 avio_wl16(&b
, track
->audio
.channels
);
1807 avio_wl16(&b
, track
->audio
.bitdepth
);
1808 if (track
->audio
.out_samplerate
< 0 || track
->audio
.out_samplerate
> INT_MAX
)
1809 return AVERROR_INVALIDDATA
;
1810 avio_wl32(&b
, track
->audio
.out_samplerate
);
1811 avio_wl32(&b
, av_rescale((matroska
->duration
* matroska
->time_scale
),
1812 track
->audio
.out_samplerate
,
1813 AV_TIME_BASE
* 1000));
1814 } else if (codec_id
== AV_CODEC_ID_RV10
||
1815 codec_id
== AV_CODEC_ID_RV20
||
1816 codec_id
== AV_CODEC_ID_RV30
||
1817 codec_id
== AV_CODEC_ID_RV40
) {
1818 extradata_offset
= 26;
1819 } else if (codec_id
== AV_CODEC_ID_RA_144
) {
1820 track
->audio
.out_samplerate
= 8000;
1821 track
->audio
.channels
= 1;
1822 } else if ((codec_id
== AV_CODEC_ID_RA_288
||
1823 codec_id
== AV_CODEC_ID_COOK
||
1824 codec_id
== AV_CODEC_ID_ATRAC3
||
1825 codec_id
== AV_CODEC_ID_SIPR
)
1826 && track
->codec_priv
.data
) {
1829 ffio_init_context(&b
, track
->codec_priv
.data
,
1830 track
->codec_priv
.size
,
1831 0, NULL
, NULL
, NULL
, NULL
);
1833 flavor
= avio_rb16(&b
);
1834 track
->audio
.coded_framesize
= avio_rb32(&b
);
1836 track
->audio
.sub_packet_h
= avio_rb16(&b
);
1837 track
->audio
.frame_size
= avio_rb16(&b
);
1838 track
->audio
.sub_packet_size
= avio_rb16(&b
);
1840 track
->audio
.coded_framesize
<= 0 ||
1841 track
->audio
.sub_packet_h
<= 0 ||
1842 track
->audio
.frame_size
<= 0 ||
1843 track
->audio
.sub_packet_size
<= 0)
1844 return AVERROR_INVALIDDATA
;
1845 track
->audio
.buf
= av_malloc_array(track
->audio
.sub_packet_h
,
1846 track
->audio
.frame_size
);
1847 if (!track
->audio
.buf
)
1848 return AVERROR(ENOMEM
);
1849 if (codec_id
== AV_CODEC_ID_RA_288
) {
1850 st
->codec
->block_align
= track
->audio
.coded_framesize
;
1851 track
->codec_priv
.size
= 0;
1853 if (codec_id
== AV_CODEC_ID_SIPR
&& flavor
< 4) {
1854 static const int sipr_bit_rate
[4] = { 6504, 8496, 5000, 16000 };
1855 track
->audio
.sub_packet_size
= ff_sipr_subpk_size
[flavor
];
1856 st
->codec
->bit_rate
= sipr_bit_rate
[flavor
];
1858 st
->codec
->block_align
= track
->audio
.sub_packet_size
;
1859 extradata_offset
= 78;
1861 } else if (codec_id
== AV_CODEC_ID_FLAC
&& track
->codec_priv
.size
) {
1862 ret
= matroska_parse_flac(s
, track
, &extradata_offset
);
1865 } else if (codec_id
== AV_CODEC_ID_PRORES
&& track
->codec_priv
.size
== 4) {
1866 fourcc
= AV_RL32(track
->codec_priv
.data
);
1868 track
->codec_priv
.size
-= extradata_offset
;
1870 if (codec_id
== AV_CODEC_ID_NONE
)
1871 av_log(matroska
->ctx
, AV_LOG_INFO
,
1872 "Unknown/unsupported AVCodecID %s.\n", track
->codec_id
);
1874 if (track
->time_scale
< 0.01)
1875 track
->time_scale
= 1.0;
1876 avpriv_set_pts_info(st
, 64, matroska
->time_scale
* track
->time_scale
,
1877 1000 * 1000 * 1000); /* 64 bit pts in ns */
1879 /* convert the delay from ns to the track timebase */
1880 track
->codec_delay
= av_rescale_q(track
->codec_delay
,
1881 (AVRational
){ 1, 1000000000 },
1884 st
->codec
->codec_id
= codec_id
;
1886 if (strcmp(track
->language
, "und"))
1887 av_dict_set(&st
->metadata
, "language", track
->language
, 0);
1888 av_dict_set(&st
->metadata
, "title", track
->name
, 0);
1890 if (track
->flag_default
)
1891 st
->disposition
|= AV_DISPOSITION_DEFAULT
;
1892 if (track
->flag_forced
)
1893 st
->disposition
|= AV_DISPOSITION_FORCED
;
1895 if (!st
->codec
->extradata
) {
1897 st
->codec
->extradata
= extradata
;
1898 st
->codec
->extradata_size
= extradata_size
;
1899 } else if (track
->codec_priv
.data
&& track
->codec_priv
.size
> 0) {
1900 if (ff_alloc_extradata(st
->codec
, track
->codec_priv
.size
))
1901 return AVERROR(ENOMEM
);
1902 memcpy(st
->codec
->extradata
,
1903 track
->codec_priv
.data
+ extradata_offset
,
1904 track
->codec_priv
.size
);
1908 if (track
->type
== MATROSKA_TRACK_TYPE_VIDEO
) {
1909 MatroskaTrackPlane
*planes
= track
->operation
.combine_planes
.elem
;
1911 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
1912 st
->codec
->codec_tag
= fourcc
;
1914 st
->codec
->bits_per_coded_sample
= bit_depth
;
1915 st
->codec
->width
= track
->video
.pixel_width
;
1916 st
->codec
->height
= track
->video
.pixel_height
;
1917 av_reduce(&st
->sample_aspect_ratio
.num
,
1918 &st
->sample_aspect_ratio
.den
,
1919 st
->codec
->height
* track
->video
.display_width
,
1920 st
->codec
->width
* track
->video
.display_height
,
1922 if (st
->codec
->codec_id
!= AV_CODEC_ID_HEVC
)
1923 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
;
1925 if (track
->default_duration
) {
1926 av_reduce(&st
->avg_frame_rate
.num
, &st
->avg_frame_rate
.den
,
1927 1000000000, track
->default_duration
, 30000);
1928 #if FF_API_R_FRAME_RATE
1929 if ( st
->avg_frame_rate
.num
< st
->avg_frame_rate
.den
* 1000L
1930 && st
->avg_frame_rate
.num
> st
->avg_frame_rate
.den
* 5L)
1931 st
->r_frame_rate
= st
->avg_frame_rate
;
1935 /* export stereo mode flag as metadata tag */
1936 if (track
->video
.stereo_mode
&& track
->video
.stereo_mode
< MATROSKA_VIDEO_STEREOMODE_TYPE_NB
)
1937 av_dict_set(&st
->metadata
, "stereo_mode", ff_matroska_video_stereo_mode
[track
->video
.stereo_mode
], 0);
1939 /* export alpha mode flag as metadata tag */
1940 if (track
->video
.alpha_mode
)
1941 av_dict_set(&st
->metadata
, "alpha_mode", "1", 0);
1943 /* if we have virtual track, mark the real tracks */
1944 for (j
=0; j
< track
->operation
.combine_planes
.nb_elem
; j
++) {
1946 if (planes
[j
].type
>= MATROSKA_VIDEO_STEREO_PLANE_COUNT
)
1948 snprintf(buf
, sizeof(buf
), "%s_%d",
1949 ff_matroska_video_stereo_plane
[planes
[j
].type
], i
);
1950 for (k
=0; k
< matroska
->tracks
.nb_elem
; k
++)
1951 if (planes
[j
].uid
== tracks
[k
].uid
) {
1952 av_dict_set(&s
->streams
[k
]->metadata
,
1953 "stereo_mode", buf
, 0);
1957 // add stream level stereo3d side data if it is a supported format
1958 if (track
->video
.stereo_mode
< MATROSKA_VIDEO_STEREOMODE_TYPE_NB
&&
1959 track
->video
.stereo_mode
!= 10 && track
->video
.stereo_mode
!= 12) {
1960 int ret
= ff_mkv_stereo3d_conv(st
, track
->video
.stereo_mode
);
1964 } else if (track
->type
== MATROSKA_TRACK_TYPE_AUDIO
) {
1965 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
1966 st
->codec
->sample_rate
= track
->audio
.out_samplerate
;
1967 st
->codec
->channels
= track
->audio
.channels
;
1968 if (!st
->codec
->bits_per_coded_sample
)
1969 st
->codec
->bits_per_coded_sample
= track
->audio
.bitdepth
;
1970 if (st
->codec
->codec_id
!= AV_CODEC_ID_AAC
)
1971 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
;
1972 if (track
->codec_delay
> 0) {
1973 st
->codec
->delay
= av_rescale_q(track
->codec_delay
,
1975 (AVRational
){1, st
->codec
->sample_rate
});
1977 if (track
->seek_preroll
> 0) {
1978 av_codec_set_seek_preroll(st
->codec
,
1979 av_rescale_q(track
->seek_preroll
,
1980 (AVRational
){1, 1000000000},
1981 (AVRational
){1, st
->codec
->sample_rate
}));
1983 } else if (codec_id
== AV_CODEC_ID_WEBVTT
) {
1984 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
1986 if (!strcmp(track
->codec_id
, "D_WEBVTT/CAPTIONS")) {
1987 st
->disposition
|= AV_DISPOSITION_CAPTIONS
;
1988 } else if (!strcmp(track
->codec_id
, "D_WEBVTT/DESCRIPTIONS")) {
1989 st
->disposition
|= AV_DISPOSITION_DESCRIPTIONS
;
1990 } else if (!strcmp(track
->codec_id
, "D_WEBVTT/METADATA")) {
1991 st
->disposition
|= AV_DISPOSITION_METADATA
;
1993 } else if (track
->type
== MATROSKA_TRACK_TYPE_SUBTITLE
) {
1994 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
1995 if (st
->codec
->codec_id
== AV_CODEC_ID_ASS
)
1996 matroska
->contains_ssa
= 1;
2003 static int matroska_read_header(AVFormatContext
*s
)
2005 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2006 EbmlList
*attachments_list
= &matroska
->attachments
;
2007 EbmlList
*chapters_list
= &matroska
->chapters
;
2008 MatroskaAttachment
*attachments
;
2009 MatroskaChapter
*chapters
;
2010 uint64_t max_start
= 0;
2017 /* First read the EBML header. */
2018 if (ebml_parse(matroska
, ebml_syntax
, &ebml
) ||
2019 ebml
.version
> EBML_VERSION
||
2020 ebml
.max_size
> sizeof(uint64_t) ||
2021 ebml
.id_length
> sizeof(uint32_t) ||
2022 ebml
.doctype_version
> 3 ||
2024 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2025 "EBML header using unsupported features\n"
2026 "(EBML version %"PRIu64
", doctype %s, doc version %"PRIu64
")\n",
2027 ebml
.version
, ebml
.doctype
, ebml
.doctype_version
);
2028 ebml_free(ebml_syntax
, &ebml
);
2029 return AVERROR_PATCHWELCOME
;
2030 } else if (ebml
.doctype_version
== 3) {
2031 av_log(matroska
->ctx
, AV_LOG_WARNING
,
2032 "EBML header using unsupported features\n"
2033 "(EBML version %"PRIu64
", doctype %s, doc version %"PRIu64
")\n",
2034 ebml
.version
, ebml
.doctype
, ebml
.doctype_version
);
2036 for (i
= 0; i
< FF_ARRAY_ELEMS(matroska_doctypes
); i
++)
2037 if (!strcmp(ebml
.doctype
, matroska_doctypes
[i
]))
2039 if (i
>= FF_ARRAY_ELEMS(matroska_doctypes
)) {
2040 av_log(s
, AV_LOG_WARNING
, "Unknown EBML doctype '%s'\n", ebml
.doctype
);
2041 if (matroska
->ctx
->error_recognition
& AV_EF_EXPLODE
) {
2042 ebml_free(ebml_syntax
, &ebml
);
2043 return AVERROR_INVALIDDATA
;
2046 ebml_free(ebml_syntax
, &ebml
);
2048 /* The next thing is a segment. */
2049 pos
= avio_tell(matroska
->ctx
->pb
);
2050 res
= ebml_parse(matroska
, matroska_segments
, matroska
);
2051 // try resyncing until we find a EBML_STOP type element.
2053 res
= matroska_resync(matroska
, pos
);
2056 pos
= avio_tell(matroska
->ctx
->pb
);
2057 res
= ebml_parse(matroska
, matroska_segment
, matroska
);
2059 matroska_execute_seekhead(matroska
);
2061 if (!matroska
->time_scale
)
2062 matroska
->time_scale
= 1000000;
2063 if (matroska
->duration
)
2064 matroska
->ctx
->duration
= matroska
->duration
* matroska
->time_scale
*
2065 1000 / AV_TIME_BASE
;
2066 av_dict_set(&s
->metadata
, "title", matroska
->title
, 0);
2067 av_dict_set(&s
->metadata
, "encoder", matroska
->muxingapp
, 0);
2069 if (matroska
->date_utc
.size
== 8)
2070 matroska_metadata_creation_time(&s
->metadata
, AV_RB64(matroska
->date_utc
.data
));
2072 res
= matroska_parse_tracks(s
);
2076 attachments
= attachments_list
->elem
;
2077 for (j
= 0; j
< attachments_list
->nb_elem
; j
++) {
2078 if (!(attachments
[j
].filename
&& attachments
[j
].mime
&&
2079 attachments
[j
].bin
.data
&& attachments
[j
].bin
.size
> 0)) {
2080 av_log(matroska
->ctx
, AV_LOG_ERROR
, "incomplete attachment\n");
2082 AVStream
*st
= avformat_new_stream(s
, NULL
);
2085 av_dict_set(&st
->metadata
, "filename", attachments
[j
].filename
, 0);
2086 av_dict_set(&st
->metadata
, "mimetype", attachments
[j
].mime
, 0);
2087 st
->codec
->codec_id
= AV_CODEC_ID_NONE
;
2088 st
->codec
->codec_type
= AVMEDIA_TYPE_ATTACHMENT
;
2089 if (ff_alloc_extradata(st
->codec
, attachments
[j
].bin
.size
))
2091 memcpy(st
->codec
->extradata
, attachments
[j
].bin
.data
,
2092 attachments
[j
].bin
.size
);
2094 for (i
= 0; ff_mkv_mime_tags
[i
].id
!= AV_CODEC_ID_NONE
; i
++) {
2095 if (!strncmp(ff_mkv_mime_tags
[i
].str
, attachments
[j
].mime
,
2096 strlen(ff_mkv_mime_tags
[i
].str
))) {
2097 st
->codec
->codec_id
= ff_mkv_mime_tags
[i
].id
;
2101 attachments
[j
].stream
= st
;
2105 chapters
= chapters_list
->elem
;
2106 for (i
= 0; i
< chapters_list
->nb_elem
; i
++)
2107 if (chapters
[i
].start
!= AV_NOPTS_VALUE
&& chapters
[i
].uid
&&
2108 (max_start
== 0 || chapters
[i
].start
> max_start
)) {
2109 chapters
[i
].chapter
=
2110 avpriv_new_chapter(s
, chapters
[i
].uid
,
2111 (AVRational
) { 1, 1000000000 },
2112 chapters
[i
].start
, chapters
[i
].end
,
2114 if (chapters
[i
].chapter
) {
2115 av_dict_set(&chapters
[i
].chapter
->metadata
,
2116 "title", chapters
[i
].title
, 0);
2118 max_start
= chapters
[i
].start
;
2121 matroska_add_index_entries(matroska
);
2123 matroska_convert_tags(s
);
2129 * Put one packet in an application-supplied AVPacket struct.
2130 * Returns 0 on success or -1 on failure.
2132 static int matroska_deliver_packet(MatroskaDemuxContext
*matroska
,
2135 if (matroska
->num_packets
> 0) {
2136 memcpy(pkt
, matroska
->packets
[0], sizeof(AVPacket
));
2137 av_freep(&matroska
->packets
[0]);
2138 if (matroska
->num_packets
> 1) {
2140 memmove(&matroska
->packets
[0], &matroska
->packets
[1],
2141 (matroska
->num_packets
- 1) * sizeof(AVPacket
*));
2142 newpackets
= av_realloc(matroska
->packets
,
2143 (matroska
->num_packets
- 1) *
2144 sizeof(AVPacket
*));
2146 matroska
->packets
= newpackets
;
2148 av_freep(&matroska
->packets
);
2149 matroska
->prev_pkt
= NULL
;
2151 matroska
->num_packets
--;
2159 * Free all packets in our internal queue.
2161 static void matroska_clear_queue(MatroskaDemuxContext
*matroska
)
2163 matroska
->prev_pkt
= NULL
;
2164 if (matroska
->packets
) {
2166 for (n
= 0; n
< matroska
->num_packets
; n
++) {
2167 av_free_packet(matroska
->packets
[n
]);
2168 av_freep(&matroska
->packets
[n
]);
2170 av_freep(&matroska
->packets
);
2171 matroska
->num_packets
= 0;
2175 static int matroska_parse_laces(MatroskaDemuxContext
*matroska
, uint8_t **buf
,
2176 int *buf_size
, int type
,
2177 uint32_t **lace_buf
, int *laces
)
2179 int res
= 0, n
, size
= *buf_size
;
2180 uint8_t *data
= *buf
;
2181 uint32_t *lace_size
;
2185 *lace_buf
= av_mallocz(sizeof(int));
2187 return AVERROR(ENOMEM
);
2189 *lace_buf
[0] = size
;
2193 av_assert0(size
> 0);
2197 lace_size
= av_mallocz(*laces
* sizeof(int));
2199 return AVERROR(ENOMEM
);
2202 case 0x1: /* Xiph lacing */
2206 for (n
= 0; res
== 0 && n
< *laces
- 1; n
++) {
2208 if (size
<= total
) {
2209 res
= AVERROR_INVALIDDATA
;
2214 lace_size
[n
] += temp
;
2221 if (size
<= total
) {
2222 res
= AVERROR_INVALIDDATA
;
2226 lace_size
[n
] = size
- total
;
2230 case 0x2: /* fixed-size lacing */
2231 if (size
% (*laces
)) {
2232 res
= AVERROR_INVALIDDATA
;
2235 for (n
= 0; n
< *laces
; n
++)
2236 lace_size
[n
] = size
/ *laces
;
2239 case 0x3: /* EBML lacing */
2243 n
= matroska_ebmlnum_uint(matroska
, data
, size
, &num
);
2244 if (n
< 0 || num
> INT_MAX
) {
2245 av_log(matroska
->ctx
, AV_LOG_INFO
,
2246 "EBML block data error\n");
2247 res
= n
<0 ? n
: AVERROR_INVALIDDATA
;
2252 total
= lace_size
[0] = num
;
2253 for (n
= 1; res
== 0 && n
< *laces
- 1; n
++) {
2256 r
= matroska_ebmlnum_sint(matroska
, data
, size
, &snum
);
2257 if (r
< 0 || lace_size
[n
- 1] + snum
> (uint64_t)INT_MAX
) {
2258 av_log(matroska
->ctx
, AV_LOG_INFO
,
2259 "EBML block data error\n");
2260 res
= r
<0 ? r
: AVERROR_INVALIDDATA
;
2265 lace_size
[n
] = lace_size
[n
- 1] + snum
;
2266 total
+= lace_size
[n
];
2268 if (size
<= total
) {
2269 res
= AVERROR_INVALIDDATA
;
2272 lace_size
[*laces
- 1] = size
- total
;
2278 *lace_buf
= lace_size
;
2284 static int matroska_parse_rm_audio(MatroskaDemuxContext
*matroska
,
2285 MatroskaTrack
*track
, AVStream
*st
,
2286 uint8_t *data
, int size
, uint64_t timecode
,
2289 int a
= st
->codec
->block_align
;
2290 int sps
= track
->audio
.sub_packet_size
;
2291 int cfs
= track
->audio
.coded_framesize
;
2292 int h
= track
->audio
.sub_packet_h
;
2293 int y
= track
->audio
.sub_packet_cnt
;
2294 int w
= track
->audio
.frame_size
;
2297 if (!track
->audio
.pkt_cnt
) {
2298 if (track
->audio
.sub_packet_cnt
== 0)
2299 track
->audio
.buf_timecode
= timecode
;
2300 if (st
->codec
->codec_id
== AV_CODEC_ID_RA_288
) {
2301 if (size
< cfs
* h
/ 2) {
2302 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2303 "Corrupt int4 RM-style audio packet size\n");
2304 return AVERROR_INVALIDDATA
;
2306 for (x
= 0; x
< h
/ 2; x
++)
2307 memcpy(track
->audio
.buf
+ x
* 2 * w
+ y
* cfs
,
2308 data
+ x
* cfs
, cfs
);
2309 } else if (st
->codec
->codec_id
== AV_CODEC_ID_SIPR
) {
2311 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2312 "Corrupt sipr RM-style audio packet size\n");
2313 return AVERROR_INVALIDDATA
;
2315 memcpy(track
->audio
.buf
+ y
* w
, data
, w
);
2317 if (size
< sps
* w
/ sps
|| h
<=0 || w
%sps
) {
2318 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2319 "Corrupt generic RM-style audio packet size\n");
2320 return AVERROR_INVALIDDATA
;
2322 for (x
= 0; x
< w
/ sps
; x
++)
2323 memcpy(track
->audio
.buf
+
2324 sps
* (h
* x
+ ((h
+ 1) / 2) * (y
& 1) + (y
>> 1)),
2325 data
+ x
* sps
, sps
);
2328 if (++track
->audio
.sub_packet_cnt
>= h
) {
2329 if (st
->codec
->codec_id
== AV_CODEC_ID_SIPR
)
2330 ff_rm_reorder_sipr_data(track
->audio
.buf
, h
, w
);
2331 track
->audio
.sub_packet_cnt
= 0;
2332 track
->audio
.pkt_cnt
= h
* w
/ a
;
2336 while (track
->audio
.pkt_cnt
) {
2338 AVPacket
*pkt
= av_mallocz(sizeof(AVPacket
));
2340 return AVERROR(ENOMEM
);
2342 ret
= av_new_packet(pkt
, a
);
2348 track
->audio
.buf
+ a
* (h
* w
/ a
- track
->audio
.pkt_cnt
--),
2350 pkt
->pts
= track
->audio
.buf_timecode
;
2351 track
->audio
.buf_timecode
= AV_NOPTS_VALUE
;
2353 pkt
->stream_index
= st
->index
;
2354 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2360 /* reconstruct full wavpack blocks from mangled matroska ones */
2361 static int matroska_parse_wavpack(MatroskaTrack
*track
, uint8_t *src
,
2362 uint8_t **pdst
, int *size
)
2364 uint8_t *dst
= NULL
;
2369 int ret
, offset
= 0;
2371 if (srclen
< 12 || track
->stream
->codec
->extradata_size
< 2)
2372 return AVERROR_INVALIDDATA
;
2374 ver
= AV_RL16(track
->stream
->codec
->extradata
);
2376 samples
= AV_RL32(src
);
2380 while (srclen
>= 8) {
2385 uint32_t flags
= AV_RL32(src
);
2386 uint32_t crc
= AV_RL32(src
+ 4);
2390 multiblock
= (flags
& 0x1800) != 0x1800;
2393 ret
= AVERROR_INVALIDDATA
;
2396 blocksize
= AV_RL32(src
);
2402 if (blocksize
> srclen
) {
2403 ret
= AVERROR_INVALIDDATA
;
2407 tmp
= av_realloc(dst
, dstlen
+ blocksize
+ 32);
2409 ret
= AVERROR(ENOMEM
);
2413 dstlen
+= blocksize
+ 32;
2415 AV_WL32(dst
+ offset
, MKTAG('w', 'v', 'p', 'k')); // tag
2416 AV_WL32(dst
+ offset
+ 4, blocksize
+ 24); // blocksize - 8
2417 AV_WL16(dst
+ offset
+ 8, ver
); // version
2418 AV_WL16(dst
+ offset
+ 10, 0); // track/index_no
2419 AV_WL32(dst
+ offset
+ 12, 0); // total samples
2420 AV_WL32(dst
+ offset
+ 16, 0); // block index
2421 AV_WL32(dst
+ offset
+ 20, samples
); // number of samples
2422 AV_WL32(dst
+ offset
+ 24, flags
); // flags
2423 AV_WL32(dst
+ offset
+ 28, crc
); // crc
2424 memcpy(dst
+ offset
+ 32, src
, blocksize
); // block data
2427 srclen
-= blocksize
;
2428 offset
+= blocksize
+ 32;
2441 static int matroska_parse_webvtt(MatroskaDemuxContext
*matroska
,
2442 MatroskaTrack
*track
,
2444 uint8_t *data
, int data_len
,
2450 uint8_t *id
, *settings
, *text
, *buf
;
2451 int id_len
, settings_len
, text_len
;
2456 return AVERROR_INVALIDDATA
;
2459 q
= data
+ data_len
;
2464 if (*p
== '\r' || *p
== '\n') {
2473 if (p
>= q
|| *p
!= '\n')
2474 return AVERROR_INVALIDDATA
;
2480 if (*p
== '\r' || *p
== '\n') {
2481 settings_len
= p
- settings
;
2489 if (p
>= q
|| *p
!= '\n')
2490 return AVERROR_INVALIDDATA
;
2495 while (text_len
> 0) {
2496 const int len
= text_len
- 1;
2497 const uint8_t c
= p
[len
];
2498 if (c
!= '\r' && c
!= '\n')
2504 return AVERROR_INVALIDDATA
;
2506 pkt
= av_mallocz(sizeof(*pkt
));
2507 err
= av_new_packet(pkt
, text_len
);
2510 return AVERROR(err
);
2513 memcpy(pkt
->data
, text
, text_len
);
2516 buf
= av_packet_new_side_data(pkt
,
2517 AV_PKT_DATA_WEBVTT_IDENTIFIER
,
2521 return AVERROR(ENOMEM
);
2523 memcpy(buf
, id
, id_len
);
2526 if (settings_len
> 0) {
2527 buf
= av_packet_new_side_data(pkt
,
2528 AV_PKT_DATA_WEBVTT_SETTINGS
,
2532 return AVERROR(ENOMEM
);
2534 memcpy(buf
, settings
, settings_len
);
2537 // Do we need this for subtitles?
2538 // pkt->flags = AV_PKT_FLAG_KEY;
2540 pkt
->stream_index
= st
->index
;
2541 pkt
->pts
= timecode
;
2543 // Do we need this for subtitles?
2544 // pkt->dts = timecode;
2546 pkt
->duration
= duration
;
2549 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2550 matroska
->prev_pkt
= pkt
;
2555 static int matroska_parse_frame(MatroskaDemuxContext
*matroska
,
2556 MatroskaTrack
*track
, AVStream
*st
,
2557 uint8_t *data
, int pkt_size
,
2558 uint64_t timecode
, uint64_t lace_duration
,
2559 int64_t pos
, int is_keyframe
,
2560 uint8_t *additional
, uint64_t additional_id
, int additional_size
,
2561 int64_t discard_padding
)
2563 MatroskaTrackEncoding
*encodings
= track
->encodings
.elem
;
2564 uint8_t *pkt_data
= data
;
2565 int offset
= 0, res
;
2568 if (encodings
&& !encodings
->type
&& encodings
->scope
& 1) {
2569 res
= matroska_decode_buffer(&pkt_data
, &pkt_size
, track
);
2574 if (st
->codec
->codec_id
== AV_CODEC_ID_WAVPACK
) {
2576 res
= matroska_parse_wavpack(track
, pkt_data
, &wv_data
, &pkt_size
);
2578 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2579 "Error parsing a wavpack block.\n");
2582 if (pkt_data
!= data
)
2583 av_freep(&pkt_data
);
2587 if (st
->codec
->codec_id
== AV_CODEC_ID_PRORES
&&
2588 AV_RB32(&data
[4]) != MKBETAG('i', 'c', 'p', 'f'))
2591 pkt
= av_mallocz(sizeof(AVPacket
));
2592 /* XXX: prevent data copy... */
2593 if (av_new_packet(pkt
, pkt_size
+ offset
) < 0) {
2595 res
= AVERROR(ENOMEM
);
2599 if (st
->codec
->codec_id
== AV_CODEC_ID_PRORES
&& offset
== 8) {
2600 uint8_t *buf
= pkt
->data
;
2601 bytestream_put_be32(&buf
, pkt_size
);
2602 bytestream_put_be32(&buf
, MKBETAG('i', 'c', 'p', 'f'));
2605 memcpy(pkt
->data
+ offset
, pkt_data
, pkt_size
);
2607 if (pkt_data
!= data
)
2608 av_freep(&pkt_data
);
2610 pkt
->flags
= is_keyframe
;
2611 pkt
->stream_index
= st
->index
;
2613 if (additional_size
> 0) {
2614 uint8_t *side_data
= av_packet_new_side_data(pkt
,
2615 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
,
2616 additional_size
+ 8);
2618 av_free_packet(pkt
);
2620 return AVERROR(ENOMEM
);
2622 AV_WB64(side_data
, additional_id
);
2623 memcpy(side_data
+ 8, additional
, additional_size
);
2626 if (discard_padding
) {
2627 uint8_t *side_data
= av_packet_new_side_data(pkt
,
2628 AV_PKT_DATA_SKIP_SAMPLES
,
2631 av_free_packet(pkt
);
2633 return AVERROR(ENOMEM
);
2635 AV_WL32(side_data
, 0);
2636 AV_WL32(side_data
+ 4, av_rescale_q(discard_padding
,
2637 (AVRational
){1, 1000000000},
2638 (AVRational
){1, st
->codec
->sample_rate
}));
2641 if (track
->ms_compat
)
2642 pkt
->dts
= timecode
;
2644 pkt
->pts
= timecode
;
2646 if (st
->codec
->codec_id
== AV_CODEC_ID_SUBRIP
) {
2648 * For backward compatibility.
2649 * Historically, we have put subtitle duration
2650 * in convergence_duration, on the off chance
2651 * that the time_scale is less than 1us, which
2652 * could result in a 32bit overflow on the
2653 * normal duration field.
2655 pkt
->convergence_duration
= lace_duration
;
2658 if (track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
||
2659 lace_duration
<= INT_MAX
) {
2661 * For non subtitle tracks, just store the duration
2664 * If it's a subtitle track and duration value does
2665 * not overflow a uint32, then also store it normally.
2667 pkt
->duration
= lace_duration
;
2670 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2671 matroska
->prev_pkt
= pkt
;
2676 if (pkt_data
!= data
)
2677 av_freep(&pkt_data
);
2681 static int matroska_parse_block(MatroskaDemuxContext
*matroska
, uint8_t *data
,
2682 int size
, int64_t pos
, uint64_t cluster_time
,
2683 uint64_t block_duration
, int is_keyframe
,
2684 uint8_t *additional
, uint64_t additional_id
, int additional_size
,
2685 int64_t cluster_pos
, int64_t discard_padding
)
2687 uint64_t timecode
= AV_NOPTS_VALUE
;
2688 MatroskaTrack
*track
;
2692 uint32_t *lace_size
= NULL
;
2693 int n
, flags
, laces
= 0;
2695 int trust_default_duration
= 1;
2697 if ((n
= matroska_ebmlnum_uint(matroska
, data
, size
, &num
)) < 0) {
2698 av_log(matroska
->ctx
, AV_LOG_ERROR
, "EBML block data error\n");
2704 track
= matroska_find_track_by_num(matroska
, num
);
2705 if (!track
|| !track
->stream
) {
2706 av_log(matroska
->ctx
, AV_LOG_INFO
,
2707 "Invalid stream %"PRIu64
" or size %u\n", num
, size
);
2708 return AVERROR_INVALIDDATA
;
2709 } else if (size
<= 3)
2712 if (st
->discard
>= AVDISCARD_ALL
)
2714 av_assert1(block_duration
!= AV_NOPTS_VALUE
);
2716 block_time
= sign_extend(AV_RB16(data
), 16);
2720 if (is_keyframe
== -1)
2721 is_keyframe
= flags
& 0x80 ? AV_PKT_FLAG_KEY
: 0;
2723 if (cluster_time
!= (uint64_t) -1 &&
2724 (block_time
>= 0 || cluster_time
>= -block_time
)) {
2725 timecode
= cluster_time
+ block_time
- track
->codec_delay
;
2726 if (track
->type
== MATROSKA_TRACK_TYPE_SUBTITLE
&&
2727 timecode
< track
->end_timecode
)
2728 is_keyframe
= 0; /* overlapping subtitles are not key frame */
2730 av_add_index_entry(st
, cluster_pos
, timecode
, 0, 0,
2734 if (matroska
->skip_to_keyframe
&&
2735 track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
) {
2736 if (timecode
< matroska
->skip_to_timecode
)
2739 matroska
->skip_to_keyframe
= 0;
2740 else if (!st
->skip_to_keyframe
) {
2741 av_log(matroska
->ctx
, AV_LOG_ERROR
, "File is broken, keyframes not correctly marked!\n");
2742 matroska
->skip_to_keyframe
= 0;
2746 res
= matroska_parse_laces(matroska
, &data
, &size
, (flags
& 0x06) >> 1,
2747 &lace_size
, &laces
);
2752 if (track
->audio
.samplerate
== 8000) {
2753 // If this is needed for more codecs, then add them here
2754 if (st
->codec
->codec_id
== AV_CODEC_ID_AC3
) {
2755 if (track
->audio
.samplerate
!= st
->codec
->sample_rate
|| !st
->codec
->frame_size
)
2756 trust_default_duration
= 0;
2760 if (!block_duration
&& trust_default_duration
)
2761 block_duration
= track
->default_duration
* laces
/ matroska
->time_scale
;
2763 if (cluster_time
!= (uint64_t)-1 && (block_time
>= 0 || cluster_time
>= -block_time
))
2764 track
->end_timecode
=
2765 FFMAX(track
->end_timecode
, timecode
+ block_duration
);
2767 for (n
= 0; n
< laces
; n
++) {
2768 int64_t lace_duration
= block_duration
*(n
+1) / laces
- block_duration
*n
/ laces
;
2770 if (lace_size
[n
] > size
) {
2771 av_log(matroska
->ctx
, AV_LOG_ERROR
, "Invalid packet size\n");
2775 if ((st
->codec
->codec_id
== AV_CODEC_ID_RA_288
||
2776 st
->codec
->codec_id
== AV_CODEC_ID_COOK
||
2777 st
->codec
->codec_id
== AV_CODEC_ID_SIPR
||
2778 st
->codec
->codec_id
== AV_CODEC_ID_ATRAC3
) &&
2779 st
->codec
->block_align
&& track
->audio
.sub_packet_size
) {
2780 res
= matroska_parse_rm_audio(matroska
, track
, st
, data
,
2786 } else if (st
->codec
->codec_id
== AV_CODEC_ID_WEBVTT
) {
2787 res
= matroska_parse_webvtt(matroska
, track
, st
,
2789 timecode
, lace_duration
,
2794 res
= matroska_parse_frame(matroska
, track
, st
, data
, lace_size
[n
],
2795 timecode
, lace_duration
, pos
,
2796 !n
? is_keyframe
: 0,
2797 additional
, additional_id
, additional_size
,
2803 if (timecode
!= AV_NOPTS_VALUE
)
2804 timecode
= lace_duration
? timecode
+ lace_duration
: AV_NOPTS_VALUE
;
2805 data
+= lace_size
[n
];
2806 size
-= lace_size
[n
];
2814 static int matroska_parse_cluster_incremental(MatroskaDemuxContext
*matroska
)
2816 EbmlList
*blocks_list
;
2817 MatroskaBlock
*blocks
;
2819 res
= ebml_parse(matroska
,
2820 matroska_cluster_incremental_parsing
,
2821 &matroska
->current_cluster
);
2824 if (matroska
->current_cluster_pos
)
2825 ebml_level_end(matroska
);
2826 ebml_free(matroska_cluster
, &matroska
->current_cluster
);
2827 memset(&matroska
->current_cluster
, 0, sizeof(MatroskaCluster
));
2828 matroska
->current_cluster_num_blocks
= 0;
2829 matroska
->current_cluster_pos
= avio_tell(matroska
->ctx
->pb
);
2830 matroska
->prev_pkt
= NULL
;
2831 /* sizeof the ID which was already read */
2832 if (matroska
->current_id
)
2833 matroska
->current_cluster_pos
-= 4;
2834 res
= ebml_parse(matroska
,
2835 matroska_clusters_incremental
,
2836 &matroska
->current_cluster
);
2837 /* Try parsing the block again. */
2839 res
= ebml_parse(matroska
,
2840 matroska_cluster_incremental_parsing
,
2841 &matroska
->current_cluster
);
2845 matroska
->current_cluster_num_blocks
<
2846 matroska
->current_cluster
.blocks
.nb_elem
) {
2847 blocks_list
= &matroska
->current_cluster
.blocks
;
2848 blocks
= blocks_list
->elem
;
2850 matroska
->current_cluster_num_blocks
= blocks_list
->nb_elem
;
2851 i
= blocks_list
->nb_elem
- 1;
2852 if (blocks
[i
].bin
.size
> 0 && blocks
[i
].bin
.data
) {
2853 int is_keyframe
= blocks
[i
].non_simple
? !blocks
[i
].reference
: -1;
2854 uint8_t* additional
= blocks
[i
].additional
.size
> 0 ?
2855 blocks
[i
].additional
.data
: NULL
;
2856 if (!blocks
[i
].non_simple
)
2857 blocks
[i
].duration
= 0;
2858 res
= matroska_parse_block(matroska
, blocks
[i
].bin
.data
,
2859 blocks
[i
].bin
.size
, blocks
[i
].bin
.pos
,
2860 matroska
->current_cluster
.timecode
,
2861 blocks
[i
].duration
, is_keyframe
,
2862 additional
, blocks
[i
].additional_id
,
2863 blocks
[i
].additional
.size
,
2864 matroska
->current_cluster_pos
,
2865 blocks
[i
].discard_padding
);
2872 static int matroska_parse_cluster(MatroskaDemuxContext
*matroska
)
2874 MatroskaCluster cluster
= { 0 };
2875 EbmlList
*blocks_list
;
2876 MatroskaBlock
*blocks
;
2880 if (!matroska
->contains_ssa
)
2881 return matroska_parse_cluster_incremental(matroska
);
2882 pos
= avio_tell(matroska
->ctx
->pb
);
2883 matroska
->prev_pkt
= NULL
;
2884 if (matroska
->current_id
)
2885 pos
-= 4; /* sizeof the ID which was already read */
2886 res
= ebml_parse(matroska
, matroska_clusters
, &cluster
);
2887 blocks_list
= &cluster
.blocks
;
2888 blocks
= blocks_list
->elem
;
2889 for (i
= 0; i
< blocks_list
->nb_elem
; i
++)
2890 if (blocks
[i
].bin
.size
> 0 && blocks
[i
].bin
.data
) {
2891 int is_keyframe
= blocks
[i
].non_simple
? !blocks
[i
].reference
: -1;
2892 res
= matroska_parse_block(matroska
, blocks
[i
].bin
.data
,
2893 blocks
[i
].bin
.size
, blocks
[i
].bin
.pos
,
2894 cluster
.timecode
, blocks
[i
].duration
,
2895 is_keyframe
, NULL
, 0, 0, pos
,
2896 blocks
[i
].discard_padding
);
2898 ebml_free(matroska_cluster
, &cluster
);
2902 static int matroska_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
2904 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2906 while (matroska_deliver_packet(matroska
, pkt
)) {
2907 int64_t pos
= avio_tell(matroska
->ctx
->pb
);
2910 if (matroska_parse_cluster(matroska
) < 0)
2911 matroska_resync(matroska
, pos
);
2917 static int matroska_read_seek(AVFormatContext
*s
, int stream_index
,
2918 int64_t timestamp
, int flags
)
2920 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2921 MatroskaTrack
*tracks
= NULL
;
2922 AVStream
*st
= s
->streams
[stream_index
];
2923 int i
, index
, index_sub
, index_min
;
2925 /* Parse the CUES now since we need the index data to seek. */
2926 if (matroska
->cues_parsing_deferred
> 0) {
2927 matroska
->cues_parsing_deferred
= 0;
2928 matroska_parse_cues(matroska
);
2931 if (!st
->nb_index_entries
)
2933 timestamp
= FFMAX(timestamp
, st
->index_entries
[0].timestamp
);
2935 if ((index
= av_index_search_timestamp(st
, timestamp
, flags
)) < 0 || index
== st
->nb_index_entries
- 1) {
2936 avio_seek(s
->pb
, st
->index_entries
[st
->nb_index_entries
- 1].pos
,
2938 matroska
->current_id
= 0;
2939 while ((index
= av_index_search_timestamp(st
, timestamp
, flags
)) < 0 || index
== st
->nb_index_entries
- 1) {
2940 matroska_clear_queue(matroska
);
2941 if (matroska_parse_cluster(matroska
) < 0)
2946 matroska_clear_queue(matroska
);
2947 if (index
< 0 || (matroska
->cues_parsing_deferred
< 0 && index
== st
->nb_index_entries
- 1))
2951 tracks
= matroska
->tracks
.elem
;
2952 for (i
= 0; i
< matroska
->tracks
.nb_elem
; i
++) {
2953 tracks
[i
].audio
.pkt_cnt
= 0;
2954 tracks
[i
].audio
.sub_packet_cnt
= 0;
2955 tracks
[i
].audio
.buf_timecode
= AV_NOPTS_VALUE
;
2956 tracks
[i
].end_timecode
= 0;
2957 if (tracks
[i
].type
== MATROSKA_TRACK_TYPE_SUBTITLE
&&
2958 tracks
[i
].stream
->discard
!= AVDISCARD_ALL
) {
2959 index_sub
= av_index_search_timestamp(
2960 tracks
[i
].stream
, st
->index_entries
[index
].timestamp
,
2961 AVSEEK_FLAG_BACKWARD
);
2962 while (index_sub
>= 0 &&
2964 tracks
[i
].stream
->index_entries
[index_sub
].pos
< st
->index_entries
[index_min
].pos
&&
2965 st
->index_entries
[index
].timestamp
- tracks
[i
].stream
->index_entries
[index_sub
].timestamp
< 30000000000 / matroska
->time_scale
)
2970 avio_seek(s
->pb
, st
->index_entries
[index_min
].pos
, SEEK_SET
);
2971 matroska
->current_id
= 0;
2972 if (flags
& AVSEEK_FLAG_ANY
) {
2973 st
->skip_to_keyframe
= 0;
2974 matroska
->skip_to_timecode
= timestamp
;
2976 st
->skip_to_keyframe
= 1;
2977 matroska
->skip_to_timecode
= st
->index_entries
[index
].timestamp
;
2979 matroska
->skip_to_keyframe
= 1;
2981 matroska
->num_levels
= 0;
2982 ff_update_cur_dts(s
, st
, st
->index_entries
[index
].timestamp
);
2985 // slightly hackish but allows proper fallback to
2986 // the generic seeking code.
2987 matroska_clear_queue(matroska
);
2988 matroska
->current_id
= 0;
2989 st
->skip_to_keyframe
=
2990 matroska
->skip_to_keyframe
= 0;
2992 matroska
->num_levels
= 0;
2996 static int matroska_read_close(AVFormatContext
*s
)
2998 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2999 MatroskaTrack
*tracks
= matroska
->tracks
.elem
;
3002 matroska_clear_queue(matroska
);
3004 for (n
= 0; n
< matroska
->tracks
.nb_elem
; n
++)
3005 if (tracks
[n
].type
== MATROSKA_TRACK_TYPE_AUDIO
)
3006 av_freep(&tracks
[n
].audio
.buf
);
3007 ebml_free(matroska_cluster
, &matroska
->current_cluster
);
3008 ebml_free(matroska_segment
, matroska
);
3014 int64_t start_time_ns
;
3015 int64_t end_time_ns
;
3016 int64_t start_offset
;
3020 /* This function searches all the Cues and returns the CueDesc corresponding the
3021 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3022 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3024 static CueDesc
get_cue_desc(AVFormatContext
*s
, int64_t ts
, int64_t cues_start
) {
3025 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3028 int nb_index_entries
= s
->streams
[0]->nb_index_entries
;
3029 AVIndexEntry
*index_entries
= s
->streams
[0]->index_entries
;
3030 if (ts
>= matroska
->duration
* matroska
->time_scale
) return (CueDesc
) {-1, -1, -1, -1};
3031 for (i
= 1; i
< nb_index_entries
; i
++) {
3032 if (index_entries
[i
- 1].timestamp
* matroska
->time_scale
<= ts
&&
3033 index_entries
[i
].timestamp
* matroska
->time_scale
> ts
) {
3038 cue_desc
.start_time_ns
= index_entries
[i
].timestamp
* matroska
->time_scale
;
3039 cue_desc
.start_offset
= index_entries
[i
].pos
- matroska
->segment_start
;
3040 if (i
!= nb_index_entries
- 1) {
3041 cue_desc
.end_time_ns
= index_entries
[i
+ 1].timestamp
* matroska
->time_scale
;
3042 cue_desc
.end_offset
= index_entries
[i
+ 1].pos
- matroska
->segment_start
;
3044 cue_desc
.end_time_ns
= matroska
->duration
* matroska
->time_scale
;
3045 // FIXME: this needs special handling for files where Cues appear
3046 // before Clusters. the current logic assumes Cues appear after
3048 cue_desc
.end_offset
= cues_start
- matroska
->segment_start
;
3053 static int webm_clusters_start_with_keyframe(AVFormatContext
*s
)
3055 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3056 int64_t cluster_pos
, before_pos
;
3058 if (s
->streams
[0]->nb_index_entries
<= 0) return 0;
3059 // seek to the first cluster using cues.
3060 index
= av_index_search_timestamp(s
->streams
[0], 0, 0);
3061 if (index
< 0) return 0;
3062 cluster_pos
= s
->streams
[0]->index_entries
[index
].pos
;
3063 before_pos
= avio_tell(s
->pb
);
3065 int64_t cluster_id
= 0, cluster_length
= 0;
3067 avio_seek(s
->pb
, cluster_pos
, SEEK_SET
);
3068 // read cluster id and length
3069 ebml_read_num(matroska
, matroska
->ctx
->pb
, 4, &cluster_id
);
3070 ebml_read_length(matroska
, matroska
->ctx
->pb
, &cluster_length
);
3071 if (cluster_id
!= 0xF43B675) { // done with all clusters
3074 avio_seek(s
->pb
, cluster_pos
, SEEK_SET
);
3075 matroska
->current_id
= 0;
3076 matroska_clear_queue(matroska
);
3077 if (matroska_parse_cluster(matroska
) < 0 ||
3078 matroska
->num_packets
<= 0) {
3081 pkt
= matroska
->packets
[0];
3082 cluster_pos
+= cluster_length
+ 12; // 12 is the offset of the cluster id and length.
3083 if (!(pkt
->flags
& AV_PKT_FLAG_KEY
)) {
3088 avio_seek(s
->pb
, before_pos
, SEEK_SET
);
3092 static int buffer_size_after_time_downloaded(int64_t time_ns
, double search_sec
, int64_t bps
,
3093 double min_buffer
, double* buffer
,
3094 double* sec_to_download
, AVFormatContext
*s
,
3097 double nano_seconds_per_second
= 1000000000.0;
3098 double time_sec
= time_ns
/ nano_seconds_per_second
;
3100 int64_t time_to_search_ns
= (int64_t)(search_sec
* nano_seconds_per_second
);
3101 int64_t end_time_ns
= time_ns
+ time_to_search_ns
;
3102 double sec_downloaded
= 0.0;
3103 CueDesc desc_curr
= get_cue_desc(s
, time_ns
, cues_start
);
3104 if (desc_curr
.start_time_ns
== -1)
3106 *sec_to_download
= 0.0;
3108 // Check for non cue start time.
3109 if (time_ns
> desc_curr
.start_time_ns
) {
3110 int64_t cue_nano
= desc_curr
.end_time_ns
- time_ns
;
3111 double percent
= (double)(cue_nano
) / (desc_curr
.end_time_ns
- desc_curr
.start_time_ns
);
3112 double cueBytes
= (desc_curr
.end_offset
- desc_curr
.start_offset
) * percent
;
3113 double timeToDownload
= (cueBytes
* 8.0) / bps
;
3115 sec_downloaded
+= (cue_nano
/ nano_seconds_per_second
) - timeToDownload
;
3116 *sec_to_download
+= timeToDownload
;
3118 // Check if the search ends within the first cue.
3119 if (desc_curr
.end_time_ns
>= end_time_ns
) {
3120 double desc_end_time_sec
= desc_curr
.end_time_ns
/ nano_seconds_per_second
;
3121 double percent_to_sub
= search_sec
/ (desc_end_time_sec
- time_sec
);
3122 sec_downloaded
= percent_to_sub
* sec_downloaded
;
3123 *sec_to_download
= percent_to_sub
* *sec_to_download
;
3126 if ((sec_downloaded
+ *buffer
) <= min_buffer
) {
3130 // Get the next Cue.
3131 desc_curr
= get_cue_desc(s
, desc_curr
.end_time_ns
, cues_start
);
3134 while (desc_curr
.start_time_ns
!= -1) {
3135 int64_t desc_bytes
= desc_curr
.end_offset
- desc_curr
.start_offset
;
3136 int64_t desc_ns
= desc_curr
.end_time_ns
- desc_curr
.start_time_ns
;
3137 double desc_sec
= desc_ns
/ nano_seconds_per_second
;
3138 double bits
= (desc_bytes
* 8.0);
3139 double time_to_download
= bits
/ bps
;
3141 sec_downloaded
+= desc_sec
- time_to_download
;
3142 *sec_to_download
+= time_to_download
;
3144 if (desc_curr
.end_time_ns
>= end_time_ns
) {
3145 double desc_end_time_sec
= desc_curr
.end_time_ns
/ nano_seconds_per_second
;
3146 double percent_to_sub
= search_sec
/ (desc_end_time_sec
- time_sec
);
3147 sec_downloaded
= percent_to_sub
* sec_downloaded
;
3148 *sec_to_download
= percent_to_sub
* *sec_to_download
;
3150 if ((sec_downloaded
+ *buffer
) <= min_buffer
)
3155 if ((sec_downloaded
+ *buffer
) <= min_buffer
) {
3160 desc_curr
= get_cue_desc(s
, desc_curr
.end_time_ns
, cues_start
);
3162 *buffer
= *buffer
+ sec_downloaded
;
3166 /* This function computes the bandwidth of the WebM file with the help of
3167 * buffer_size_after_time_downloaded() function. Both of these functions are
3168 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3169 * Matroska parsing mechanism.
3171 * Returns the bandwidth of the file on success; -1 on error.
3173 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext
*s
, int64_t cues_start
)
3175 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3176 AVStream
*st
= s
->streams
[0];
3177 double bandwidth
= 0.0;
3180 for (i
= 0; i
< st
->nb_index_entries
; i
++) {
3181 int64_t prebuffer_ns
= 1000000000;
3182 int64_t time_ns
= st
->index_entries
[i
].timestamp
* matroska
->time_scale
;
3183 double nano_seconds_per_second
= 1000000000.0;
3184 int64_t prebuffered_ns
= time_ns
+ prebuffer_ns
;
3185 double prebuffer_bytes
= 0.0;
3186 int64_t temp_prebuffer_ns
= prebuffer_ns
;
3187 int64_t pre_bytes
, pre_ns
;
3188 double pre_sec
, prebuffer
, bits_per_second
;
3189 CueDesc desc_beg
= get_cue_desc(s
, time_ns
, cues_start
);
3191 // Start with the first Cue.
3192 CueDesc desc_end
= desc_beg
;
3194 // Figure out how much data we have downloaded for the prebuffer. This will
3195 // be used later to adjust the bits per sample to try.
3196 while (desc_end
.start_time_ns
!= -1 && desc_end
.end_time_ns
< prebuffered_ns
) {
3197 // Prebuffered the entire Cue.
3198 prebuffer_bytes
+= desc_end
.end_offset
- desc_end
.start_offset
;
3199 temp_prebuffer_ns
-= desc_end
.end_time_ns
- desc_end
.start_time_ns
;
3200 desc_end
= get_cue_desc(s
, desc_end
.end_time_ns
, cues_start
);
3202 if (desc_end
.start_time_ns
== -1) {
3203 // The prebuffer is larger than the duration.
3204 if (matroska
->duration
* matroska
->time_scale
>= prebuffered_ns
)
3206 bits_per_second
= 0.0;
3208 // The prebuffer ends in the last Cue. Estimate how much data was
3210 pre_bytes
= desc_end
.end_offset
- desc_end
.start_offset
;
3211 pre_ns
= desc_end
.end_time_ns
- desc_end
.start_time_ns
;
3212 pre_sec
= pre_ns
/ nano_seconds_per_second
;
3214 pre_bytes
* ((temp_prebuffer_ns
/ nano_seconds_per_second
) / pre_sec
);
3216 prebuffer
= prebuffer_ns
/ nano_seconds_per_second
;
3218 // Set this to 0.0 in case our prebuffer buffers the entire video.
3219 bits_per_second
= 0.0;
3221 int64_t desc_bytes
= desc_end
.end_offset
- desc_beg
.start_offset
;
3222 int64_t desc_ns
= desc_end
.end_time_ns
- desc_beg
.start_time_ns
;
3223 double desc_sec
= desc_ns
/ nano_seconds_per_second
;
3224 double calc_bits_per_second
= (desc_bytes
* 8) / desc_sec
;
3226 // Drop the bps by the percentage of bytes buffered.
3227 double percent
= (desc_bytes
- prebuffer_bytes
) / desc_bytes
;
3228 double mod_bits_per_second
= calc_bits_per_second
* percent
;
3230 if (prebuffer
< desc_sec
) {
3232 (double)(matroska
->duration
* matroska
->time_scale
) / nano_seconds_per_second
;
3234 // Add 1 so the bits per second should be a little bit greater than file
3236 int64_t bps
= (int64_t)(mod_bits_per_second
) + 1;
3237 const double min_buffer
= 0.0;
3238 double buffer
= prebuffer
;
3239 double sec_to_download
= 0.0;
3241 int rv
= buffer_size_after_time_downloaded(prebuffered_ns
, search_sec
, bps
,
3242 min_buffer
, &buffer
, &sec_to_download
,
3246 } else if (rv
== 0) {
3247 bits_per_second
= (double)(bps
);
3252 desc_end
= get_cue_desc(s
, desc_end
.end_time_ns
, cues_start
);
3253 } while (desc_end
.start_time_ns
!= -1);
3255 if (bandwidth
< bits_per_second
) bandwidth
= bits_per_second
;
3257 return (int64_t)bandwidth
;
3260 static int webm_dash_manifest_cues(AVFormatContext
*s
)
3262 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3263 EbmlList
*seekhead_list
= &matroska
->seekhead
;
3264 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
3266 int64_t cues_start
= -1, cues_end
= -1, before_pos
, bandwidth
;
3269 // determine cues start and end positions
3270 for (i
= 0; i
< seekhead_list
->nb_elem
; i
++)
3271 if (seekhead
[i
].id
== MATROSKA_ID_CUES
)
3274 if (i
>= seekhead_list
->nb_elem
) return -1;
3276 before_pos
= avio_tell(matroska
->ctx
->pb
);
3277 cues_start
= seekhead
[i
].pos
+ matroska
->segment_start
;
3278 if (avio_seek(matroska
->ctx
->pb
, cues_start
, SEEK_SET
) == cues_start
) {
3279 // cues_end is computed as cues_start + cues_length + length of the
3280 // Cues element ID + EBML length of the Cues element. cues_end is
3281 // inclusive and the above sum is reduced by 1.
3282 uint64_t cues_length
= 0, cues_id
= 0, bytes_read
= 0;
3283 bytes_read
+= ebml_read_num(matroska
, matroska
->ctx
->pb
, 4, &cues_id
);
3284 bytes_read
+= ebml_read_length(matroska
, matroska
->ctx
->pb
, &cues_length
);
3285 cues_end
= cues_start
+ cues_length
+ bytes_read
- 1;
3287 avio_seek(matroska
->ctx
->pb
, before_pos
, SEEK_SET
);
3288 if (cues_start
== -1 || cues_end
== -1) return -1;
3291 matroska_parse_cues(matroska
);
3294 av_dict_set_int(&s
->streams
[0]->metadata
, CUES_START
, cues_start
, 0);
3297 av_dict_set_int(&s
->streams
[0]->metadata
, CUES_END
, cues_end
, 0);
3300 bandwidth
= webm_dash_manifest_compute_bandwidth(s
, cues_start
);
3301 if (bandwidth
< 0) return -1;
3302 av_dict_set_int(&s
->streams
[0]->metadata
, BANDWIDTH
, bandwidth
, 0);
3304 // check if all clusters start with key frames
3305 av_dict_set_int(&s
->streams
[0]->metadata
, CLUSTER_KEYFRAME
, webm_clusters_start_with_keyframe(s
), 0);
3307 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3308 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3309 buf
= av_malloc(s
->streams
[0]->nb_index_entries
* 20 * sizeof(char));
3310 if (!buf
) return -1;
3312 for (i
= 0; i
< s
->streams
[0]->nb_index_entries
; i
++) {
3313 snprintf(buf
, (i
+ 1) * 20 * sizeof(char),
3314 "%s%" PRId64
, buf
, s
->streams
[0]->index_entries
[i
].timestamp
);
3315 if (i
!= s
->streams
[0]->nb_index_entries
- 1)
3316 strncat(buf
, ",", sizeof(char));
3318 av_dict_set(&s
->streams
[0]->metadata
, CUE_TIMESTAMPS
, buf
, 0);
3324 static int webm_dash_manifest_read_header(AVFormatContext
*s
)
3327 int ret
= matroska_read_header(s
);
3328 MatroskaTrack
*tracks
;
3329 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3331 av_log(s
, AV_LOG_ERROR
, "Failed to read file headers\n");
3335 // initialization range
3336 // 5 is the offset of Cluster ID.
3337 av_dict_set_int(&s
->streams
[0]->metadata
, INITIALIZATION_RANGE
, avio_tell(s
->pb
) - 5, 0);
3339 // basename of the file
3340 buf
= strrchr(s
->filename
, '/');
3341 av_dict_set(&s
->streams
[0]->metadata
, FILENAME
, buf
? ++buf
: s
->filename
, 0);
3344 buf
= av_asprintf("%g", matroska
->duration
);
3345 if (!buf
) return AVERROR(ENOMEM
);
3346 av_dict_set(&s
->streams
[0]->metadata
, DURATION
, buf
, 0);
3350 tracks
= matroska
->tracks
.elem
;
3351 av_dict_set_int(&s
->streams
[0]->metadata
, TRACK_NUMBER
, tracks
[0].num
, 0);
3353 // parse the cues and populate Cue related fields
3354 return webm_dash_manifest_cues(s
);
3357 static int webm_dash_manifest_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
3362 AVInputFormat ff_matroska_demuxer
= {
3363 .name
= "matroska,webm",
3364 .long_name
= NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3365 .extensions
= "mkv,mk3d,mka,mks",
3366 .priv_data_size
= sizeof(MatroskaDemuxContext
),
3367 .read_probe
= matroska_probe
,
3368 .read_header
= matroska_read_header
,
3369 .read_packet
= matroska_read_packet
,
3370 .read_close
= matroska_read_close
,
3371 .read_seek
= matroska_read_seek
,
3372 .mime_type
= "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3375 AVInputFormat ff_webm_dash_manifest_demuxer
= {
3376 .name
= "webm_dash_manifest",
3377 .long_name
= NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3378 .priv_data_size
= sizeof(MatroskaDemuxContext
),
3379 .read_header
= webm_dash_manifest_read_header
,
3380 .read_packet
= webm_dash_manifest_read_packet
,
3381 .read_close
= matroska_read_close
,