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_free(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
);
1418 // we should not do any seeking in the streaming case
1419 if (!matroska
->ctx
->pb
->seekable
||
1420 (matroska
->ctx
->flags
& AVFMT_FLAG_IGNIDX
))
1423 for (i
= 0; i
< seekhead_list
->nb_elem
; i
++) {
1424 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
1425 if (seekhead
[i
].pos
<= before_pos
)
1428 // defer cues parsing until we actually need cue data.
1429 if (seekhead
[i
].id
== MATROSKA_ID_CUES
) {
1430 matroska
->cues_parsing_deferred
= 1;
1434 if (matroska_parse_seekhead_entry(matroska
, i
) < 0) {
1435 // mark index as broken
1436 matroska
->cues_parsing_deferred
= -1;
1442 static void matroska_add_index_entries(MatroskaDemuxContext
*matroska
)
1444 EbmlList
*index_list
;
1445 MatroskaIndex
*index
;
1446 int index_scale
= 1;
1449 index_list
= &matroska
->index
;
1450 index
= index_list
->elem
;
1451 if (index_list
->nb_elem
&&
1452 index
[0].time
> 1E14
/ matroska
->time_scale
) {
1453 av_log(matroska
->ctx
, AV_LOG_WARNING
, "Working around broken index.\n");
1454 index_scale
= matroska
->time_scale
;
1456 for (i
= 0; i
< index_list
->nb_elem
; i
++) {
1457 EbmlList
*pos_list
= &index
[i
].pos
;
1458 MatroskaIndexPos
*pos
= pos_list
->elem
;
1459 for (j
= 0; j
< pos_list
->nb_elem
; j
++) {
1460 MatroskaTrack
*track
= matroska_find_track_by_num(matroska
,
1462 if (track
&& track
->stream
)
1463 av_add_index_entry(track
->stream
,
1464 pos
[j
].pos
+ matroska
->segment_start
,
1465 index
[i
].time
/ index_scale
, 0, 0,
1471 static void matroska_parse_cues(MatroskaDemuxContext
*matroska
) {
1472 EbmlList
*seekhead_list
= &matroska
->seekhead
;
1473 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
1476 for (i
= 0; i
< seekhead_list
->nb_elem
; i
++)
1477 if (seekhead
[i
].id
== MATROSKA_ID_CUES
)
1479 av_assert1(i
<= seekhead_list
->nb_elem
);
1481 if (matroska_parse_seekhead_entry(matroska
, i
) < 0)
1482 matroska
->cues_parsing_deferred
= -1;
1483 matroska_add_index_entries(matroska
);
1486 static int matroska_aac_profile(char *codec_id
)
1488 static const char *const aac_profiles
[] = { "MAIN", "LC", "SSR" };
1491 for (profile
= 0; profile
< FF_ARRAY_ELEMS(aac_profiles
); profile
++)
1492 if (strstr(codec_id
, aac_profiles
[profile
]))
1497 static int matroska_aac_sri(int samplerate
)
1501 for (sri
= 0; sri
< FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates
); sri
++)
1502 if (avpriv_mpeg4audio_sample_rates
[sri
] == samplerate
)
1507 static void matroska_metadata_creation_time(AVDictionary
**metadata
, int64_t date_utc
)
1510 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1511 time_t creation_time
= date_utc
/ 1000000000 + 978307200;
1512 struct tm tmpbuf
, *ptm
= gmtime_r(&creation_time
, &tmpbuf
);
1514 if (strftime(buffer
, sizeof(buffer
), "%Y-%m-%d %H:%M:%S", ptm
))
1515 av_dict_set(metadata
, "creation_time", buffer
, 0);
1518 static int matroska_parse_flac(AVFormatContext
*s
,
1519 MatroskaTrack
*track
,
1522 AVStream
*st
= track
->stream
;
1523 uint8_t *p
= track
->codec_priv
.data
;
1524 int size
= track
->codec_priv
.size
;
1526 if (size
< 8 + FLAC_STREAMINFO_SIZE
|| p
[4] & 0x7f) {
1527 av_log(s
, AV_LOG_WARNING
, "Invalid FLAC private data\n");
1528 track
->codec_priv
.size
= 0;
1532 track
->codec_priv
.size
= 8 + FLAC_STREAMINFO_SIZE
;
1534 p
+= track
->codec_priv
.size
;
1535 size
-= track
->codec_priv
.size
;
1537 /* parse the remaining metadata blocks if present */
1539 int block_last
, block_type
, block_size
;
1541 flac_parse_block_header(p
, &block_last
, &block_type
, &block_size
);
1545 if (block_size
> size
)
1548 /* check for the channel mask */
1549 if (block_type
== FLAC_METADATA_TYPE_VORBIS_COMMENT
) {
1550 AVDictionary
*dict
= NULL
;
1551 AVDictionaryEntry
*chmask
;
1553 ff_vorbis_comment(s
, &dict
, p
, block_size
, 0);
1554 chmask
= av_dict_get(dict
, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL
, 0);
1556 uint64_t mask
= strtol(chmask
->value
, NULL
, 0);
1557 if (!mask
|| mask
& ~0x3ffffULL
) {
1558 av_log(s
, AV_LOG_WARNING
,
1559 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
1561 st
->codec
->channel_layout
= mask
;
1563 av_dict_free(&dict
);
1573 static int matroska_parse_tracks(AVFormatContext
*s
)
1575 MatroskaDemuxContext
*matroska
= s
->priv_data
;
1576 MatroskaTrack
*tracks
= matroska
->tracks
.elem
;
1581 for (i
= 0; i
< matroska
->tracks
.nb_elem
; i
++) {
1582 MatroskaTrack
*track
= &tracks
[i
];
1583 enum AVCodecID codec_id
= AV_CODEC_ID_NONE
;
1584 EbmlList
*encodings_list
= &track
->encodings
;
1585 MatroskaTrackEncoding
*encodings
= encodings_list
->elem
;
1586 uint8_t *extradata
= NULL
;
1587 int extradata_size
= 0;
1588 int extradata_offset
= 0;
1589 uint32_t fourcc
= 0;
1591 char* key_id_base64
= NULL
;
1594 /* Apply some sanity checks. */
1595 if (track
->type
!= MATROSKA_TRACK_TYPE_VIDEO
&&
1596 track
->type
!= MATROSKA_TRACK_TYPE_AUDIO
&&
1597 track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
&&
1598 track
->type
!= MATROSKA_TRACK_TYPE_METADATA
) {
1599 av_log(matroska
->ctx
, AV_LOG_INFO
,
1600 "Unknown or unsupported track type %"PRIu64
"\n",
1604 if (!track
->codec_id
)
1607 if (track
->type
== MATROSKA_TRACK_TYPE_VIDEO
) {
1608 if (!track
->default_duration
&& track
->video
.frame_rate
> 0)
1609 track
->default_duration
= 1000000000 / track
->video
.frame_rate
;
1610 if (track
->video
.display_width
== -1)
1611 track
->video
.display_width
= track
->video
.pixel_width
;
1612 if (track
->video
.display_height
== -1)
1613 track
->video
.display_height
= track
->video
.pixel_height
;
1614 if (track
->video
.color_space
.size
== 4)
1615 fourcc
= AV_RL32(track
->video
.color_space
.data
);
1616 } else if (track
->type
== MATROSKA_TRACK_TYPE_AUDIO
) {
1617 if (!track
->audio
.out_samplerate
)
1618 track
->audio
.out_samplerate
= track
->audio
.samplerate
;
1620 if (encodings_list
->nb_elem
> 1) {
1621 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1622 "Multiple combined encodings not supported");
1623 } else if (encodings_list
->nb_elem
== 1) {
1624 if (encodings
[0].type
) {
1625 if (encodings
[0].encryption
.key_id
.size
> 0) {
1626 /* Save the encryption key id to be stored later as a
1628 const int b64_size
= AV_BASE64_SIZE(encodings
[0].encryption
.key_id
.size
);
1629 key_id_base64
= av_malloc(b64_size
);
1630 if (key_id_base64
== NULL
)
1631 return AVERROR(ENOMEM
);
1633 av_base64_encode(key_id_base64
, b64_size
,
1634 encodings
[0].encryption
.key_id
.data
,
1635 encodings
[0].encryption
.key_id
.size
);
1637 encodings
[0].scope
= 0;
1638 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1639 "Unsupported encoding type");
1643 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_ZLIB
&&
1646 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_BZLIB
&&
1649 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_LZO
&&
1651 encodings
[0].compression
.algo
!= MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP
) {
1652 encodings
[0].scope
= 0;
1653 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1654 "Unsupported encoding type");
1655 } else if (track
->codec_priv
.size
&& encodings
[0].scope
& 2) {
1656 uint8_t *codec_priv
= track
->codec_priv
.data
;
1657 int ret
= matroska_decode_buffer(&track
->codec_priv
.data
,
1658 &track
->codec_priv
.size
,
1661 track
->codec_priv
.data
= NULL
;
1662 track
->codec_priv
.size
= 0;
1663 av_log(matroska
->ctx
, AV_LOG_ERROR
,
1664 "Failed to decode codec private data\n");
1667 if (codec_priv
!= track
->codec_priv
.data
)
1668 av_free(codec_priv
);
1672 for (j
= 0; ff_mkv_codec_tags
[j
].id
!= AV_CODEC_ID_NONE
; j
++) {
1673 if (!strncmp(ff_mkv_codec_tags
[j
].str
, track
->codec_id
,
1674 strlen(ff_mkv_codec_tags
[j
].str
))) {
1675 codec_id
= ff_mkv_codec_tags
[j
].id
;
1680 st
= track
->stream
= avformat_new_stream(s
, NULL
);
1682 av_free(key_id_base64
);
1683 return AVERROR(ENOMEM
);
1686 if (key_id_base64
) {
1687 /* export encryption key id as base64 metadata tag */
1688 av_dict_set(&st
->metadata
, "enc_key_id", key_id_base64
, 0);
1689 av_freep(&key_id_base64
);
1692 if (!strcmp(track
->codec_id
, "V_MS/VFW/FOURCC") &&
1693 track
->codec_priv
.size
>= 40 &&
1694 track
->codec_priv
.data
) {
1695 track
->ms_compat
= 1;
1696 bit_depth
= AV_RL16(track
->codec_priv
.data
+ 14);
1697 fourcc
= AV_RL32(track
->codec_priv
.data
+ 16);
1698 codec_id
= ff_codec_get_id(ff_codec_bmp_tags
,
1701 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
,
1703 extradata_offset
= 40;
1704 } else if (!strcmp(track
->codec_id
, "A_MS/ACM") &&
1705 track
->codec_priv
.size
>= 14 &&
1706 track
->codec_priv
.data
) {
1708 ffio_init_context(&b
, track
->codec_priv
.data
,
1709 track
->codec_priv
.size
,
1710 0, NULL
, NULL
, NULL
, NULL
);
1711 ret
= ff_get_wav_header(&b
, st
->codec
, track
->codec_priv
.size
);
1714 codec_id
= st
->codec
->codec_id
;
1715 extradata_offset
= FFMIN(track
->codec_priv
.size
, 18);
1716 } else if (!strcmp(track
->codec_id
, "A_QUICKTIME")
1717 && (track
->codec_priv
.size
>= 86)
1718 && (track
->codec_priv
.data
)) {
1719 fourcc
= AV_RL32(track
->codec_priv
.data
+ 4);
1720 codec_id
= ff_codec_get_id(ff_codec_movaudio_tags
, fourcc
);
1721 if (ff_codec_get_id(ff_codec_movaudio_tags
, AV_RL32(track
->codec_priv
.data
))) {
1722 fourcc
= AV_RL32(track
->codec_priv
.data
);
1723 codec_id
= ff_codec_get_id(ff_codec_movaudio_tags
, fourcc
);
1725 } else if (!strcmp(track
->codec_id
, "V_QUICKTIME") &&
1726 (track
->codec_priv
.size
>= 21) &&
1727 (track
->codec_priv
.data
)) {
1728 fourcc
= AV_RL32(track
->codec_priv
.data
+ 4);
1729 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
, fourcc
);
1730 if (ff_codec_get_id(ff_codec_movvideo_tags
, AV_RL32(track
->codec_priv
.data
))) {
1731 fourcc
= AV_RL32(track
->codec_priv
.data
);
1732 codec_id
= ff_codec_get_id(ff_codec_movvideo_tags
, fourcc
);
1734 if (codec_id
== AV_CODEC_ID_NONE
&& AV_RL32(track
->codec_priv
.data
+4) == AV_RL32("SMI "))
1735 codec_id
= AV_CODEC_ID_SVQ3
;
1736 } else if (codec_id
== AV_CODEC_ID_PCM_S16BE
) {
1737 switch (track
->audio
.bitdepth
) {
1739 codec_id
= AV_CODEC_ID_PCM_U8
;
1742 codec_id
= AV_CODEC_ID_PCM_S24BE
;
1745 codec_id
= AV_CODEC_ID_PCM_S32BE
;
1748 } else if (codec_id
== AV_CODEC_ID_PCM_S16LE
) {
1749 switch (track
->audio
.bitdepth
) {
1751 codec_id
= AV_CODEC_ID_PCM_U8
;
1754 codec_id
= AV_CODEC_ID_PCM_S24LE
;
1757 codec_id
= AV_CODEC_ID_PCM_S32LE
;
1760 } else if (codec_id
== AV_CODEC_ID_PCM_F32LE
&&
1761 track
->audio
.bitdepth
== 64) {
1762 codec_id
= AV_CODEC_ID_PCM_F64LE
;
1763 } else if (codec_id
== AV_CODEC_ID_AAC
&& !track
->codec_priv
.size
) {
1764 int profile
= matroska_aac_profile(track
->codec_id
);
1765 int sri
= matroska_aac_sri(track
->audio
.samplerate
);
1766 extradata
= av_mallocz(5 + FF_INPUT_BUFFER_PADDING_SIZE
);
1768 return AVERROR(ENOMEM
);
1769 extradata
[0] = (profile
<< 3) | ((sri
& 0x0E) >> 1);
1770 extradata
[1] = ((sri
& 0x01) << 7) | (track
->audio
.channels
<< 3);
1771 if (strstr(track
->codec_id
, "SBR")) {
1772 sri
= matroska_aac_sri(track
->audio
.out_samplerate
);
1773 extradata
[2] = 0x56;
1774 extradata
[3] = 0xE5;
1775 extradata
[4] = 0x80 | (sri
<< 3);
1779 } else if (codec_id
== AV_CODEC_ID_ALAC
&& track
->codec_priv
.size
&& track
->codec_priv
.size
< INT_MAX
- 12 - FF_INPUT_BUFFER_PADDING_SIZE
) {
1780 /* Only ALAC's magic cookie is stored in Matroska's track headers.
1781 * Create the "atom size", "tag", and "tag version" fields the
1782 * decoder expects manually. */
1783 extradata_size
= 12 + track
->codec_priv
.size
;
1784 extradata
= av_mallocz(extradata_size
+
1785 FF_INPUT_BUFFER_PADDING_SIZE
);
1787 return AVERROR(ENOMEM
);
1788 AV_WB32(extradata
, extradata_size
);
1789 memcpy(&extradata
[4], "alac", 4);
1790 AV_WB32(&extradata
[8], 0);
1791 memcpy(&extradata
[12], track
->codec_priv
.data
,
1792 track
->codec_priv
.size
);
1793 } else if (codec_id
== AV_CODEC_ID_TTA
) {
1794 extradata_size
= 30;
1795 extradata
= av_mallocz(extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
1797 return AVERROR(ENOMEM
);
1798 ffio_init_context(&b
, extradata
, extradata_size
, 1,
1799 NULL
, NULL
, NULL
, NULL
);
1800 avio_write(&b
, "TTA1", 4);
1802 avio_wl16(&b
, track
->audio
.channels
);
1803 avio_wl16(&b
, track
->audio
.bitdepth
);
1804 if (track
->audio
.out_samplerate
< 0 || track
->audio
.out_samplerate
> INT_MAX
)
1805 return AVERROR_INVALIDDATA
;
1806 avio_wl32(&b
, track
->audio
.out_samplerate
);
1807 avio_wl32(&b
, av_rescale((matroska
->duration
* matroska
->time_scale
),
1808 track
->audio
.out_samplerate
,
1809 AV_TIME_BASE
* 1000));
1810 } else if (codec_id
== AV_CODEC_ID_RV10
||
1811 codec_id
== AV_CODEC_ID_RV20
||
1812 codec_id
== AV_CODEC_ID_RV30
||
1813 codec_id
== AV_CODEC_ID_RV40
) {
1814 extradata_offset
= 26;
1815 } else if (codec_id
== AV_CODEC_ID_RA_144
) {
1816 track
->audio
.out_samplerate
= 8000;
1817 track
->audio
.channels
= 1;
1818 } else if ((codec_id
== AV_CODEC_ID_RA_288
||
1819 codec_id
== AV_CODEC_ID_COOK
||
1820 codec_id
== AV_CODEC_ID_ATRAC3
||
1821 codec_id
== AV_CODEC_ID_SIPR
)
1822 && track
->codec_priv
.data
) {
1825 ffio_init_context(&b
, track
->codec_priv
.data
,
1826 track
->codec_priv
.size
,
1827 0, NULL
, NULL
, NULL
, NULL
);
1829 flavor
= avio_rb16(&b
);
1830 track
->audio
.coded_framesize
= avio_rb32(&b
);
1832 track
->audio
.sub_packet_h
= avio_rb16(&b
);
1833 track
->audio
.frame_size
= avio_rb16(&b
);
1834 track
->audio
.sub_packet_size
= avio_rb16(&b
);
1836 track
->audio
.coded_framesize
<= 0 ||
1837 track
->audio
.sub_packet_h
<= 0 ||
1838 track
->audio
.frame_size
<= 0 ||
1839 track
->audio
.sub_packet_size
<= 0)
1840 return AVERROR_INVALIDDATA
;
1841 track
->audio
.buf
= av_malloc_array(track
->audio
.sub_packet_h
,
1842 track
->audio
.frame_size
);
1843 if (!track
->audio
.buf
)
1844 return AVERROR(ENOMEM
);
1845 if (codec_id
== AV_CODEC_ID_RA_288
) {
1846 st
->codec
->block_align
= track
->audio
.coded_framesize
;
1847 track
->codec_priv
.size
= 0;
1849 if (codec_id
== AV_CODEC_ID_SIPR
&& flavor
< 4) {
1850 static const int sipr_bit_rate
[4] = { 6504, 8496, 5000, 16000 };
1851 track
->audio
.sub_packet_size
= ff_sipr_subpk_size
[flavor
];
1852 st
->codec
->bit_rate
= sipr_bit_rate
[flavor
];
1854 st
->codec
->block_align
= track
->audio
.sub_packet_size
;
1855 extradata_offset
= 78;
1857 } else if (codec_id
== AV_CODEC_ID_FLAC
&& track
->codec_priv
.size
) {
1858 ret
= matroska_parse_flac(s
, track
, &extradata_offset
);
1861 } else if (codec_id
== AV_CODEC_ID_PRORES
&& track
->codec_priv
.size
== 4) {
1862 fourcc
= AV_RL32(track
->codec_priv
.data
);
1864 track
->codec_priv
.size
-= extradata_offset
;
1866 if (codec_id
== AV_CODEC_ID_NONE
)
1867 av_log(matroska
->ctx
, AV_LOG_INFO
,
1868 "Unknown/unsupported AVCodecID %s.\n", track
->codec_id
);
1870 if (track
->time_scale
< 0.01)
1871 track
->time_scale
= 1.0;
1872 avpriv_set_pts_info(st
, 64, matroska
->time_scale
* track
->time_scale
,
1873 1000 * 1000 * 1000); /* 64 bit pts in ns */
1875 /* convert the delay from ns to the track timebase */
1876 track
->codec_delay
= av_rescale_q(track
->codec_delay
,
1877 (AVRational
){ 1, 1000000000 },
1880 st
->codec
->codec_id
= codec_id
;
1882 if (strcmp(track
->language
, "und"))
1883 av_dict_set(&st
->metadata
, "language", track
->language
, 0);
1884 av_dict_set(&st
->metadata
, "title", track
->name
, 0);
1886 if (track
->flag_default
)
1887 st
->disposition
|= AV_DISPOSITION_DEFAULT
;
1888 if (track
->flag_forced
)
1889 st
->disposition
|= AV_DISPOSITION_FORCED
;
1891 if (!st
->codec
->extradata
) {
1893 st
->codec
->extradata
= extradata
;
1894 st
->codec
->extradata_size
= extradata_size
;
1895 } else if (track
->codec_priv
.data
&& track
->codec_priv
.size
> 0) {
1896 if (ff_alloc_extradata(st
->codec
, track
->codec_priv
.size
))
1897 return AVERROR(ENOMEM
);
1898 memcpy(st
->codec
->extradata
,
1899 track
->codec_priv
.data
+ extradata_offset
,
1900 track
->codec_priv
.size
);
1904 if (track
->type
== MATROSKA_TRACK_TYPE_VIDEO
) {
1905 MatroskaTrackPlane
*planes
= track
->operation
.combine_planes
.elem
;
1907 st
->codec
->codec_type
= AVMEDIA_TYPE_VIDEO
;
1908 st
->codec
->codec_tag
= fourcc
;
1910 st
->codec
->bits_per_coded_sample
= bit_depth
;
1911 st
->codec
->width
= track
->video
.pixel_width
;
1912 st
->codec
->height
= track
->video
.pixel_height
;
1913 av_reduce(&st
->sample_aspect_ratio
.num
,
1914 &st
->sample_aspect_ratio
.den
,
1915 st
->codec
->height
* track
->video
.display_width
,
1916 st
->codec
->width
* track
->video
.display_height
,
1918 if (st
->codec
->codec_id
!= AV_CODEC_ID_HEVC
)
1919 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
;
1921 if (track
->default_duration
) {
1922 av_reduce(&st
->avg_frame_rate
.num
, &st
->avg_frame_rate
.den
,
1923 1000000000, track
->default_duration
, 30000);
1924 #if FF_API_R_FRAME_RATE
1925 if ( st
->avg_frame_rate
.num
< st
->avg_frame_rate
.den
* 1000L
1926 && st
->avg_frame_rate
.num
> st
->avg_frame_rate
.den
* 5L)
1927 st
->r_frame_rate
= st
->avg_frame_rate
;
1931 /* export stereo mode flag as metadata tag */
1932 if (track
->video
.stereo_mode
&& track
->video
.stereo_mode
< MATROSKA_VIDEO_STEREOMODE_TYPE_NB
)
1933 av_dict_set(&st
->metadata
, "stereo_mode", ff_matroska_video_stereo_mode
[track
->video
.stereo_mode
], 0);
1935 /* export alpha mode flag as metadata tag */
1936 if (track
->video
.alpha_mode
)
1937 av_dict_set(&st
->metadata
, "alpha_mode", "1", 0);
1939 /* if we have virtual track, mark the real tracks */
1940 for (j
=0; j
< track
->operation
.combine_planes
.nb_elem
; j
++) {
1942 if (planes
[j
].type
>= MATROSKA_VIDEO_STEREO_PLANE_COUNT
)
1944 snprintf(buf
, sizeof(buf
), "%s_%d",
1945 ff_matroska_video_stereo_plane
[planes
[j
].type
], i
);
1946 for (k
=0; k
< matroska
->tracks
.nb_elem
; k
++)
1947 if (planes
[j
].uid
== tracks
[k
].uid
) {
1948 av_dict_set(&s
->streams
[k
]->metadata
,
1949 "stereo_mode", buf
, 0);
1953 // add stream level stereo3d side data if it is a supported format
1954 if (track
->video
.stereo_mode
< MATROSKA_VIDEO_STEREOMODE_TYPE_NB
&&
1955 track
->video
.stereo_mode
!= 10 && track
->video
.stereo_mode
!= 12) {
1956 int ret
= ff_mkv_stereo3d_conv(st
, track
->video
.stereo_mode
);
1960 } else if (track
->type
== MATROSKA_TRACK_TYPE_AUDIO
) {
1961 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
1962 st
->codec
->sample_rate
= track
->audio
.out_samplerate
;
1963 st
->codec
->channels
= track
->audio
.channels
;
1964 if (!st
->codec
->bits_per_coded_sample
)
1965 st
->codec
->bits_per_coded_sample
= track
->audio
.bitdepth
;
1966 if (st
->codec
->codec_id
!= AV_CODEC_ID_AAC
)
1967 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
;
1968 if (track
->codec_delay
> 0) {
1969 st
->codec
->delay
= av_rescale_q(track
->codec_delay
,
1971 (AVRational
){1, st
->codec
->sample_rate
});
1973 if (track
->seek_preroll
> 0) {
1974 av_codec_set_seek_preroll(st
->codec
,
1975 av_rescale_q(track
->seek_preroll
,
1976 (AVRational
){1, 1000000000},
1977 (AVRational
){1, st
->codec
->sample_rate
}));
1979 } else if (codec_id
== AV_CODEC_ID_WEBVTT
) {
1980 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
1982 if (!strcmp(track
->codec_id
, "D_WEBVTT/CAPTIONS")) {
1983 st
->disposition
|= AV_DISPOSITION_CAPTIONS
;
1984 } else if (!strcmp(track
->codec_id
, "D_WEBVTT/DESCRIPTIONS")) {
1985 st
->disposition
|= AV_DISPOSITION_DESCRIPTIONS
;
1986 } else if (!strcmp(track
->codec_id
, "D_WEBVTT/METADATA")) {
1987 st
->disposition
|= AV_DISPOSITION_METADATA
;
1989 } else if (track
->type
== MATROSKA_TRACK_TYPE_SUBTITLE
) {
1990 st
->codec
->codec_type
= AVMEDIA_TYPE_SUBTITLE
;
1991 if (st
->codec
->codec_id
== AV_CODEC_ID_ASS
)
1992 matroska
->contains_ssa
= 1;
1999 static int matroska_read_header(AVFormatContext
*s
)
2001 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2002 EbmlList
*attachments_list
= &matroska
->attachments
;
2003 EbmlList
*chapters_list
= &matroska
->chapters
;
2004 MatroskaAttachment
*attachments
;
2005 MatroskaChapter
*chapters
;
2006 uint64_t max_start
= 0;
2013 /* First read the EBML header. */
2014 if (ebml_parse(matroska
, ebml_syntax
, &ebml
) ||
2015 ebml
.version
> EBML_VERSION
||
2016 ebml
.max_size
> sizeof(uint64_t) ||
2017 ebml
.id_length
> sizeof(uint32_t) ||
2018 ebml
.doctype_version
> 3 ||
2020 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2021 "EBML header using unsupported features\n"
2022 "(EBML version %"PRIu64
", doctype %s, doc version %"PRIu64
")\n",
2023 ebml
.version
, ebml
.doctype
, ebml
.doctype_version
);
2024 ebml_free(ebml_syntax
, &ebml
);
2025 return AVERROR_PATCHWELCOME
;
2026 } else if (ebml
.doctype_version
== 3) {
2027 av_log(matroska
->ctx
, AV_LOG_WARNING
,
2028 "EBML header using unsupported features\n"
2029 "(EBML version %"PRIu64
", doctype %s, doc version %"PRIu64
")\n",
2030 ebml
.version
, ebml
.doctype
, ebml
.doctype_version
);
2032 for (i
= 0; i
< FF_ARRAY_ELEMS(matroska_doctypes
); i
++)
2033 if (!strcmp(ebml
.doctype
, matroska_doctypes
[i
]))
2035 if (i
>= FF_ARRAY_ELEMS(matroska_doctypes
)) {
2036 av_log(s
, AV_LOG_WARNING
, "Unknown EBML doctype '%s'\n", ebml
.doctype
);
2037 if (matroska
->ctx
->error_recognition
& AV_EF_EXPLODE
) {
2038 ebml_free(ebml_syntax
, &ebml
);
2039 return AVERROR_INVALIDDATA
;
2042 ebml_free(ebml_syntax
, &ebml
);
2044 /* The next thing is a segment. */
2045 pos
= avio_tell(matroska
->ctx
->pb
);
2046 res
= ebml_parse(matroska
, matroska_segments
, matroska
);
2047 // try resyncing until we find a EBML_STOP type element.
2049 res
= matroska_resync(matroska
, pos
);
2052 pos
= avio_tell(matroska
->ctx
->pb
);
2053 res
= ebml_parse(matroska
, matroska_segment
, matroska
);
2055 matroska_execute_seekhead(matroska
);
2057 if (!matroska
->time_scale
)
2058 matroska
->time_scale
= 1000000;
2059 if (matroska
->duration
)
2060 matroska
->ctx
->duration
= matroska
->duration
* matroska
->time_scale
*
2061 1000 / AV_TIME_BASE
;
2062 av_dict_set(&s
->metadata
, "title", matroska
->title
, 0);
2063 av_dict_set(&s
->metadata
, "encoder", matroska
->muxingapp
, 0);
2065 if (matroska
->date_utc
.size
== 8)
2066 matroska_metadata_creation_time(&s
->metadata
, AV_RB64(matroska
->date_utc
.data
));
2068 res
= matroska_parse_tracks(s
);
2072 attachments
= attachments_list
->elem
;
2073 for (j
= 0; j
< attachments_list
->nb_elem
; j
++) {
2074 if (!(attachments
[j
].filename
&& attachments
[j
].mime
&&
2075 attachments
[j
].bin
.data
&& attachments
[j
].bin
.size
> 0)) {
2076 av_log(matroska
->ctx
, AV_LOG_ERROR
, "incomplete attachment\n");
2078 AVStream
*st
= avformat_new_stream(s
, NULL
);
2081 av_dict_set(&st
->metadata
, "filename", attachments
[j
].filename
, 0);
2082 av_dict_set(&st
->metadata
, "mimetype", attachments
[j
].mime
, 0);
2083 st
->codec
->codec_id
= AV_CODEC_ID_NONE
;
2084 st
->codec
->codec_type
= AVMEDIA_TYPE_ATTACHMENT
;
2085 if (ff_alloc_extradata(st
->codec
, attachments
[j
].bin
.size
))
2087 memcpy(st
->codec
->extradata
, attachments
[j
].bin
.data
,
2088 attachments
[j
].bin
.size
);
2090 for (i
= 0; ff_mkv_mime_tags
[i
].id
!= AV_CODEC_ID_NONE
; i
++) {
2091 if (!strncmp(ff_mkv_mime_tags
[i
].str
, attachments
[j
].mime
,
2092 strlen(ff_mkv_mime_tags
[i
].str
))) {
2093 st
->codec
->codec_id
= ff_mkv_mime_tags
[i
].id
;
2097 attachments
[j
].stream
= st
;
2101 chapters
= chapters_list
->elem
;
2102 for (i
= 0; i
< chapters_list
->nb_elem
; i
++)
2103 if (chapters
[i
].start
!= AV_NOPTS_VALUE
&& chapters
[i
].uid
&&
2104 (max_start
== 0 || chapters
[i
].start
> max_start
)) {
2105 chapters
[i
].chapter
=
2106 avpriv_new_chapter(s
, chapters
[i
].uid
,
2107 (AVRational
) { 1, 1000000000 },
2108 chapters
[i
].start
, chapters
[i
].end
,
2110 if (chapters
[i
].chapter
) {
2111 av_dict_set(&chapters
[i
].chapter
->metadata
,
2112 "title", chapters
[i
].title
, 0);
2114 max_start
= chapters
[i
].start
;
2117 matroska_add_index_entries(matroska
);
2119 matroska_convert_tags(s
);
2125 * Put one packet in an application-supplied AVPacket struct.
2126 * Returns 0 on success or -1 on failure.
2128 static int matroska_deliver_packet(MatroskaDemuxContext
*matroska
,
2131 if (matroska
->num_packets
> 0) {
2132 memcpy(pkt
, matroska
->packets
[0], sizeof(AVPacket
));
2133 av_free(matroska
->packets
[0]);
2134 if (matroska
->num_packets
> 1) {
2136 memmove(&matroska
->packets
[0], &matroska
->packets
[1],
2137 (matroska
->num_packets
- 1) * sizeof(AVPacket
*));
2138 newpackets
= av_realloc(matroska
->packets
,
2139 (matroska
->num_packets
- 1) *
2140 sizeof(AVPacket
*));
2142 matroska
->packets
= newpackets
;
2144 av_freep(&matroska
->packets
);
2145 matroska
->prev_pkt
= NULL
;
2147 matroska
->num_packets
--;
2155 * Free all packets in our internal queue.
2157 static void matroska_clear_queue(MatroskaDemuxContext
*matroska
)
2159 matroska
->prev_pkt
= NULL
;
2160 if (matroska
->packets
) {
2162 for (n
= 0; n
< matroska
->num_packets
; n
++) {
2163 av_free_packet(matroska
->packets
[n
]);
2164 av_free(matroska
->packets
[n
]);
2166 av_freep(&matroska
->packets
);
2167 matroska
->num_packets
= 0;
2171 static int matroska_parse_laces(MatroskaDemuxContext
*matroska
, uint8_t **buf
,
2172 int *buf_size
, int type
,
2173 uint32_t **lace_buf
, int *laces
)
2175 int res
= 0, n
, size
= *buf_size
;
2176 uint8_t *data
= *buf
;
2177 uint32_t *lace_size
;
2181 *lace_buf
= av_mallocz(sizeof(int));
2183 return AVERROR(ENOMEM
);
2185 *lace_buf
[0] = size
;
2189 av_assert0(size
> 0);
2193 lace_size
= av_mallocz(*laces
* sizeof(int));
2195 return AVERROR(ENOMEM
);
2198 case 0x1: /* Xiph lacing */
2202 for (n
= 0; res
== 0 && n
< *laces
- 1; n
++) {
2204 if (size
<= total
) {
2205 res
= AVERROR_INVALIDDATA
;
2210 lace_size
[n
] += temp
;
2217 if (size
<= total
) {
2218 res
= AVERROR_INVALIDDATA
;
2222 lace_size
[n
] = size
- total
;
2226 case 0x2: /* fixed-size lacing */
2227 if (size
% (*laces
)) {
2228 res
= AVERROR_INVALIDDATA
;
2231 for (n
= 0; n
< *laces
; n
++)
2232 lace_size
[n
] = size
/ *laces
;
2235 case 0x3: /* EBML lacing */
2239 n
= matroska_ebmlnum_uint(matroska
, data
, size
, &num
);
2240 if (n
< 0 || num
> INT_MAX
) {
2241 av_log(matroska
->ctx
, AV_LOG_INFO
,
2242 "EBML block data error\n");
2243 res
= n
<0 ? n
: AVERROR_INVALIDDATA
;
2248 total
= lace_size
[0] = num
;
2249 for (n
= 1; res
== 0 && n
< *laces
- 1; n
++) {
2252 r
= matroska_ebmlnum_sint(matroska
, data
, size
, &snum
);
2253 if (r
< 0 || lace_size
[n
- 1] + snum
> (uint64_t)INT_MAX
) {
2254 av_log(matroska
->ctx
, AV_LOG_INFO
,
2255 "EBML block data error\n");
2256 res
= r
<0 ? r
: AVERROR_INVALIDDATA
;
2261 lace_size
[n
] = lace_size
[n
- 1] + snum
;
2262 total
+= lace_size
[n
];
2264 if (size
<= total
) {
2265 res
= AVERROR_INVALIDDATA
;
2268 lace_size
[*laces
- 1] = size
- total
;
2274 *lace_buf
= lace_size
;
2280 static int matroska_parse_rm_audio(MatroskaDemuxContext
*matroska
,
2281 MatroskaTrack
*track
, AVStream
*st
,
2282 uint8_t *data
, int size
, uint64_t timecode
,
2285 int a
= st
->codec
->block_align
;
2286 int sps
= track
->audio
.sub_packet_size
;
2287 int cfs
= track
->audio
.coded_framesize
;
2288 int h
= track
->audio
.sub_packet_h
;
2289 int y
= track
->audio
.sub_packet_cnt
;
2290 int w
= track
->audio
.frame_size
;
2293 if (!track
->audio
.pkt_cnt
) {
2294 if (track
->audio
.sub_packet_cnt
== 0)
2295 track
->audio
.buf_timecode
= timecode
;
2296 if (st
->codec
->codec_id
== AV_CODEC_ID_RA_288
) {
2297 if (size
< cfs
* h
/ 2) {
2298 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2299 "Corrupt int4 RM-style audio packet size\n");
2300 return AVERROR_INVALIDDATA
;
2302 for (x
= 0; x
< h
/ 2; x
++)
2303 memcpy(track
->audio
.buf
+ x
* 2 * w
+ y
* cfs
,
2304 data
+ x
* cfs
, cfs
);
2305 } else if (st
->codec
->codec_id
== AV_CODEC_ID_SIPR
) {
2307 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2308 "Corrupt sipr RM-style audio packet size\n");
2309 return AVERROR_INVALIDDATA
;
2311 memcpy(track
->audio
.buf
+ y
* w
, data
, w
);
2313 if (size
< sps
* w
/ sps
|| h
<=0 || w
%sps
) {
2314 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2315 "Corrupt generic RM-style audio packet size\n");
2316 return AVERROR_INVALIDDATA
;
2318 for (x
= 0; x
< w
/ sps
; x
++)
2319 memcpy(track
->audio
.buf
+
2320 sps
* (h
* x
+ ((h
+ 1) / 2) * (y
& 1) + (y
>> 1)),
2321 data
+ x
* sps
, sps
);
2324 if (++track
->audio
.sub_packet_cnt
>= h
) {
2325 if (st
->codec
->codec_id
== AV_CODEC_ID_SIPR
)
2326 ff_rm_reorder_sipr_data(track
->audio
.buf
, h
, w
);
2327 track
->audio
.sub_packet_cnt
= 0;
2328 track
->audio
.pkt_cnt
= h
* w
/ a
;
2332 while (track
->audio
.pkt_cnt
) {
2334 AVPacket
*pkt
= av_mallocz(sizeof(AVPacket
));
2336 return AVERROR(ENOMEM
);
2338 ret
= av_new_packet(pkt
, a
);
2344 track
->audio
.buf
+ a
* (h
* w
/ a
- track
->audio
.pkt_cnt
--),
2346 pkt
->pts
= track
->audio
.buf_timecode
;
2347 track
->audio
.buf_timecode
= AV_NOPTS_VALUE
;
2349 pkt
->stream_index
= st
->index
;
2350 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2356 /* reconstruct full wavpack blocks from mangled matroska ones */
2357 static int matroska_parse_wavpack(MatroskaTrack
*track
, uint8_t *src
,
2358 uint8_t **pdst
, int *size
)
2360 uint8_t *dst
= NULL
;
2365 int ret
, offset
= 0;
2367 if (srclen
< 12 || track
->stream
->codec
->extradata_size
< 2)
2368 return AVERROR_INVALIDDATA
;
2370 ver
= AV_RL16(track
->stream
->codec
->extradata
);
2372 samples
= AV_RL32(src
);
2376 while (srclen
>= 8) {
2381 uint32_t flags
= AV_RL32(src
);
2382 uint32_t crc
= AV_RL32(src
+ 4);
2386 multiblock
= (flags
& 0x1800) != 0x1800;
2389 ret
= AVERROR_INVALIDDATA
;
2392 blocksize
= AV_RL32(src
);
2398 if (blocksize
> srclen
) {
2399 ret
= AVERROR_INVALIDDATA
;
2403 tmp
= av_realloc(dst
, dstlen
+ blocksize
+ 32);
2405 ret
= AVERROR(ENOMEM
);
2409 dstlen
+= blocksize
+ 32;
2411 AV_WL32(dst
+ offset
, MKTAG('w', 'v', 'p', 'k')); // tag
2412 AV_WL32(dst
+ offset
+ 4, blocksize
+ 24); // blocksize - 8
2413 AV_WL16(dst
+ offset
+ 8, ver
); // version
2414 AV_WL16(dst
+ offset
+ 10, 0); // track/index_no
2415 AV_WL32(dst
+ offset
+ 12, 0); // total samples
2416 AV_WL32(dst
+ offset
+ 16, 0); // block index
2417 AV_WL32(dst
+ offset
+ 20, samples
); // number of samples
2418 AV_WL32(dst
+ offset
+ 24, flags
); // flags
2419 AV_WL32(dst
+ offset
+ 28, crc
); // crc
2420 memcpy(dst
+ offset
+ 32, src
, blocksize
); // block data
2423 srclen
-= blocksize
;
2424 offset
+= blocksize
+ 32;
2437 static int matroska_parse_webvtt(MatroskaDemuxContext
*matroska
,
2438 MatroskaTrack
*track
,
2440 uint8_t *data
, int data_len
,
2446 uint8_t *id
, *settings
, *text
, *buf
;
2447 int id_len
, settings_len
, text_len
;
2452 return AVERROR_INVALIDDATA
;
2455 q
= data
+ data_len
;
2460 if (*p
== '\r' || *p
== '\n') {
2469 if (p
>= q
|| *p
!= '\n')
2470 return AVERROR_INVALIDDATA
;
2476 if (*p
== '\r' || *p
== '\n') {
2477 settings_len
= p
- settings
;
2485 if (p
>= q
|| *p
!= '\n')
2486 return AVERROR_INVALIDDATA
;
2491 while (text_len
> 0) {
2492 const int len
= text_len
- 1;
2493 const uint8_t c
= p
[len
];
2494 if (c
!= '\r' && c
!= '\n')
2500 return AVERROR_INVALIDDATA
;
2502 pkt
= av_mallocz(sizeof(*pkt
));
2503 err
= av_new_packet(pkt
, text_len
);
2506 return AVERROR(err
);
2509 memcpy(pkt
->data
, text
, text_len
);
2512 buf
= av_packet_new_side_data(pkt
,
2513 AV_PKT_DATA_WEBVTT_IDENTIFIER
,
2517 return AVERROR(ENOMEM
);
2519 memcpy(buf
, id
, id_len
);
2522 if (settings_len
> 0) {
2523 buf
= av_packet_new_side_data(pkt
,
2524 AV_PKT_DATA_WEBVTT_SETTINGS
,
2528 return AVERROR(ENOMEM
);
2530 memcpy(buf
, settings
, settings_len
);
2533 // Do we need this for subtitles?
2534 // pkt->flags = AV_PKT_FLAG_KEY;
2536 pkt
->stream_index
= st
->index
;
2537 pkt
->pts
= timecode
;
2539 // Do we need this for subtitles?
2540 // pkt->dts = timecode;
2542 pkt
->duration
= duration
;
2545 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2546 matroska
->prev_pkt
= pkt
;
2551 static int matroska_parse_frame(MatroskaDemuxContext
*matroska
,
2552 MatroskaTrack
*track
, AVStream
*st
,
2553 uint8_t *data
, int pkt_size
,
2554 uint64_t timecode
, uint64_t lace_duration
,
2555 int64_t pos
, int is_keyframe
,
2556 uint8_t *additional
, uint64_t additional_id
, int additional_size
,
2557 int64_t discard_padding
)
2559 MatroskaTrackEncoding
*encodings
= track
->encodings
.elem
;
2560 uint8_t *pkt_data
= data
;
2561 int offset
= 0, res
;
2564 if (encodings
&& !encodings
->type
&& encodings
->scope
& 1) {
2565 res
= matroska_decode_buffer(&pkt_data
, &pkt_size
, track
);
2570 if (st
->codec
->codec_id
== AV_CODEC_ID_WAVPACK
) {
2572 res
= matroska_parse_wavpack(track
, pkt_data
, &wv_data
, &pkt_size
);
2574 av_log(matroska
->ctx
, AV_LOG_ERROR
,
2575 "Error parsing a wavpack block.\n");
2578 if (pkt_data
!= data
)
2579 av_freep(&pkt_data
);
2583 if (st
->codec
->codec_id
== AV_CODEC_ID_PRORES
&&
2584 AV_RB32(&data
[4]) != MKBETAG('i', 'c', 'p', 'f'))
2587 pkt
= av_mallocz(sizeof(AVPacket
));
2588 /* XXX: prevent data copy... */
2589 if (av_new_packet(pkt
, pkt_size
+ offset
) < 0) {
2591 res
= AVERROR(ENOMEM
);
2595 if (st
->codec
->codec_id
== AV_CODEC_ID_PRORES
&& offset
== 8) {
2596 uint8_t *buf
= pkt
->data
;
2597 bytestream_put_be32(&buf
, pkt_size
);
2598 bytestream_put_be32(&buf
, MKBETAG('i', 'c', 'p', 'f'));
2601 memcpy(pkt
->data
+ offset
, pkt_data
, pkt_size
);
2603 if (pkt_data
!= data
)
2604 av_freep(&pkt_data
);
2606 pkt
->flags
= is_keyframe
;
2607 pkt
->stream_index
= st
->index
;
2609 if (additional_size
> 0) {
2610 uint8_t *side_data
= av_packet_new_side_data(pkt
,
2611 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
,
2612 additional_size
+ 8);
2614 av_free_packet(pkt
);
2616 return AVERROR(ENOMEM
);
2618 AV_WB64(side_data
, additional_id
);
2619 memcpy(side_data
+ 8, additional
, additional_size
);
2622 if (discard_padding
) {
2623 uint8_t *side_data
= av_packet_new_side_data(pkt
,
2624 AV_PKT_DATA_SKIP_SAMPLES
,
2627 av_free_packet(pkt
);
2629 return AVERROR(ENOMEM
);
2631 AV_WL32(side_data
, 0);
2632 AV_WL32(side_data
+ 4, av_rescale_q(discard_padding
,
2633 (AVRational
){1, 1000000000},
2634 (AVRational
){1, st
->codec
->sample_rate
}));
2637 if (track
->ms_compat
)
2638 pkt
->dts
= timecode
;
2640 pkt
->pts
= timecode
;
2642 if (st
->codec
->codec_id
== AV_CODEC_ID_SUBRIP
) {
2644 * For backward compatibility.
2645 * Historically, we have put subtitle duration
2646 * in convergence_duration, on the off chance
2647 * that the time_scale is less than 1us, which
2648 * could result in a 32bit overflow on the
2649 * normal duration field.
2651 pkt
->convergence_duration
= lace_duration
;
2654 if (track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
||
2655 lace_duration
<= INT_MAX
) {
2657 * For non subtitle tracks, just store the duration
2660 * If it's a subtitle track and duration value does
2661 * not overflow a uint32, then also store it normally.
2663 pkt
->duration
= lace_duration
;
2666 dynarray_add(&matroska
->packets
, &matroska
->num_packets
, pkt
);
2667 matroska
->prev_pkt
= pkt
;
2672 if (pkt_data
!= data
)
2673 av_freep(&pkt_data
);
2677 static int matroska_parse_block(MatroskaDemuxContext
*matroska
, uint8_t *data
,
2678 int size
, int64_t pos
, uint64_t cluster_time
,
2679 uint64_t block_duration
, int is_keyframe
,
2680 uint8_t *additional
, uint64_t additional_id
, int additional_size
,
2681 int64_t cluster_pos
, int64_t discard_padding
)
2683 uint64_t timecode
= AV_NOPTS_VALUE
;
2684 MatroskaTrack
*track
;
2688 uint32_t *lace_size
= NULL
;
2689 int n
, flags
, laces
= 0;
2691 int trust_default_duration
= 1;
2693 if ((n
= matroska_ebmlnum_uint(matroska
, data
, size
, &num
)) < 0) {
2694 av_log(matroska
->ctx
, AV_LOG_ERROR
, "EBML block data error\n");
2700 track
= matroska_find_track_by_num(matroska
, num
);
2701 if (!track
|| !track
->stream
) {
2702 av_log(matroska
->ctx
, AV_LOG_INFO
,
2703 "Invalid stream %"PRIu64
" or size %u\n", num
, size
);
2704 return AVERROR_INVALIDDATA
;
2705 } else if (size
<= 3)
2708 if (st
->discard
>= AVDISCARD_ALL
)
2710 av_assert1(block_duration
!= AV_NOPTS_VALUE
);
2712 block_time
= sign_extend(AV_RB16(data
), 16);
2716 if (is_keyframe
== -1)
2717 is_keyframe
= flags
& 0x80 ? AV_PKT_FLAG_KEY
: 0;
2719 if (cluster_time
!= (uint64_t) -1 &&
2720 (block_time
>= 0 || cluster_time
>= -block_time
)) {
2721 timecode
= cluster_time
+ block_time
- track
->codec_delay
;
2722 if (track
->type
== MATROSKA_TRACK_TYPE_SUBTITLE
&&
2723 timecode
< track
->end_timecode
)
2724 is_keyframe
= 0; /* overlapping subtitles are not key frame */
2726 av_add_index_entry(st
, cluster_pos
, timecode
, 0, 0,
2730 if (matroska
->skip_to_keyframe
&&
2731 track
->type
!= MATROSKA_TRACK_TYPE_SUBTITLE
) {
2732 if (timecode
< matroska
->skip_to_timecode
)
2735 matroska
->skip_to_keyframe
= 0;
2736 else if (!st
->skip_to_keyframe
) {
2737 av_log(matroska
->ctx
, AV_LOG_ERROR
, "File is broken, keyframes not correctly marked!\n");
2738 matroska
->skip_to_keyframe
= 0;
2742 res
= matroska_parse_laces(matroska
, &data
, &size
, (flags
& 0x06) >> 1,
2743 &lace_size
, &laces
);
2748 if (track
->audio
.samplerate
== 8000) {
2749 // If this is needed for more codecs, then add them here
2750 if (st
->codec
->codec_id
== AV_CODEC_ID_AC3
) {
2751 if (track
->audio
.samplerate
!= st
->codec
->sample_rate
|| !st
->codec
->frame_size
)
2752 trust_default_duration
= 0;
2756 if (!block_duration
&& trust_default_duration
)
2757 block_duration
= track
->default_duration
* laces
/ matroska
->time_scale
;
2759 if (cluster_time
!= (uint64_t)-1 && (block_time
>= 0 || cluster_time
>= -block_time
))
2760 track
->end_timecode
=
2761 FFMAX(track
->end_timecode
, timecode
+ block_duration
);
2763 for (n
= 0; n
< laces
; n
++) {
2764 int64_t lace_duration
= block_duration
*(n
+1) / laces
- block_duration
*n
/ laces
;
2766 if (lace_size
[n
] > size
) {
2767 av_log(matroska
->ctx
, AV_LOG_ERROR
, "Invalid packet size\n");
2771 if ((st
->codec
->codec_id
== AV_CODEC_ID_RA_288
||
2772 st
->codec
->codec_id
== AV_CODEC_ID_COOK
||
2773 st
->codec
->codec_id
== AV_CODEC_ID_SIPR
||
2774 st
->codec
->codec_id
== AV_CODEC_ID_ATRAC3
) &&
2775 st
->codec
->block_align
&& track
->audio
.sub_packet_size
) {
2776 res
= matroska_parse_rm_audio(matroska
, track
, st
, data
,
2782 } else if (st
->codec
->codec_id
== AV_CODEC_ID_WEBVTT
) {
2783 res
= matroska_parse_webvtt(matroska
, track
, st
,
2785 timecode
, lace_duration
,
2790 res
= matroska_parse_frame(matroska
, track
, st
, data
, lace_size
[n
],
2791 timecode
, lace_duration
, pos
,
2792 !n
? is_keyframe
: 0,
2793 additional
, additional_id
, additional_size
,
2799 if (timecode
!= AV_NOPTS_VALUE
)
2800 timecode
= lace_duration
? timecode
+ lace_duration
: AV_NOPTS_VALUE
;
2801 data
+= lace_size
[n
];
2802 size
-= lace_size
[n
];
2810 static int matroska_parse_cluster_incremental(MatroskaDemuxContext
*matroska
)
2812 EbmlList
*blocks_list
;
2813 MatroskaBlock
*blocks
;
2815 res
= ebml_parse(matroska
,
2816 matroska_cluster_incremental_parsing
,
2817 &matroska
->current_cluster
);
2820 if (matroska
->current_cluster_pos
)
2821 ebml_level_end(matroska
);
2822 ebml_free(matroska_cluster
, &matroska
->current_cluster
);
2823 memset(&matroska
->current_cluster
, 0, sizeof(MatroskaCluster
));
2824 matroska
->current_cluster_num_blocks
= 0;
2825 matroska
->current_cluster_pos
= avio_tell(matroska
->ctx
->pb
);
2826 matroska
->prev_pkt
= NULL
;
2827 /* sizeof the ID which was already read */
2828 if (matroska
->current_id
)
2829 matroska
->current_cluster_pos
-= 4;
2830 res
= ebml_parse(matroska
,
2831 matroska_clusters_incremental
,
2832 &matroska
->current_cluster
);
2833 /* Try parsing the block again. */
2835 res
= ebml_parse(matroska
,
2836 matroska_cluster_incremental_parsing
,
2837 &matroska
->current_cluster
);
2841 matroska
->current_cluster_num_blocks
<
2842 matroska
->current_cluster
.blocks
.nb_elem
) {
2843 blocks_list
= &matroska
->current_cluster
.blocks
;
2844 blocks
= blocks_list
->elem
;
2846 matroska
->current_cluster_num_blocks
= blocks_list
->nb_elem
;
2847 i
= blocks_list
->nb_elem
- 1;
2848 if (blocks
[i
].bin
.size
> 0 && blocks
[i
].bin
.data
) {
2849 int is_keyframe
= blocks
[i
].non_simple
? !blocks
[i
].reference
: -1;
2850 uint8_t* additional
= blocks
[i
].additional
.size
> 0 ?
2851 blocks
[i
].additional
.data
: NULL
;
2852 if (!blocks
[i
].non_simple
)
2853 blocks
[i
].duration
= 0;
2854 res
= matroska_parse_block(matroska
, blocks
[i
].bin
.data
,
2855 blocks
[i
].bin
.size
, blocks
[i
].bin
.pos
,
2856 matroska
->current_cluster
.timecode
,
2857 blocks
[i
].duration
, is_keyframe
,
2858 additional
, blocks
[i
].additional_id
,
2859 blocks
[i
].additional
.size
,
2860 matroska
->current_cluster_pos
,
2861 blocks
[i
].discard_padding
);
2868 static int matroska_parse_cluster(MatroskaDemuxContext
*matroska
)
2870 MatroskaCluster cluster
= { 0 };
2871 EbmlList
*blocks_list
;
2872 MatroskaBlock
*blocks
;
2876 if (!matroska
->contains_ssa
)
2877 return matroska_parse_cluster_incremental(matroska
);
2878 pos
= avio_tell(matroska
->ctx
->pb
);
2879 matroska
->prev_pkt
= NULL
;
2880 if (matroska
->current_id
)
2881 pos
-= 4; /* sizeof the ID which was already read */
2882 res
= ebml_parse(matroska
, matroska_clusters
, &cluster
);
2883 blocks_list
= &cluster
.blocks
;
2884 blocks
= blocks_list
->elem
;
2885 for (i
= 0; i
< blocks_list
->nb_elem
; i
++)
2886 if (blocks
[i
].bin
.size
> 0 && blocks
[i
].bin
.data
) {
2887 int is_keyframe
= blocks
[i
].non_simple
? !blocks
[i
].reference
: -1;
2888 res
= matroska_parse_block(matroska
, blocks
[i
].bin
.data
,
2889 blocks
[i
].bin
.size
, blocks
[i
].bin
.pos
,
2890 cluster
.timecode
, blocks
[i
].duration
,
2891 is_keyframe
, NULL
, 0, 0, pos
,
2892 blocks
[i
].discard_padding
);
2894 ebml_free(matroska_cluster
, &cluster
);
2898 static int matroska_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
2900 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2902 while (matroska_deliver_packet(matroska
, pkt
)) {
2903 int64_t pos
= avio_tell(matroska
->ctx
->pb
);
2906 if (matroska_parse_cluster(matroska
) < 0)
2907 matroska_resync(matroska
, pos
);
2913 static int matroska_read_seek(AVFormatContext
*s
, int stream_index
,
2914 int64_t timestamp
, int flags
)
2916 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2917 MatroskaTrack
*tracks
= NULL
;
2918 AVStream
*st
= s
->streams
[stream_index
];
2919 int i
, index
, index_sub
, index_min
;
2921 /* Parse the CUES now since we need the index data to seek. */
2922 if (matroska
->cues_parsing_deferred
> 0) {
2923 matroska
->cues_parsing_deferred
= 0;
2924 matroska_parse_cues(matroska
);
2927 if (!st
->nb_index_entries
)
2929 timestamp
= FFMAX(timestamp
, st
->index_entries
[0].timestamp
);
2931 if ((index
= av_index_search_timestamp(st
, timestamp
, flags
)) < 0 || index
== st
->nb_index_entries
- 1) {
2932 avio_seek(s
->pb
, st
->index_entries
[st
->nb_index_entries
- 1].pos
,
2934 matroska
->current_id
= 0;
2935 while ((index
= av_index_search_timestamp(st
, timestamp
, flags
)) < 0 || index
== st
->nb_index_entries
- 1) {
2936 matroska_clear_queue(matroska
);
2937 if (matroska_parse_cluster(matroska
) < 0)
2942 matroska_clear_queue(matroska
);
2943 if (index
< 0 || (matroska
->cues_parsing_deferred
< 0 && index
== st
->nb_index_entries
- 1))
2947 tracks
= matroska
->tracks
.elem
;
2948 for (i
= 0; i
< matroska
->tracks
.nb_elem
; i
++) {
2949 tracks
[i
].audio
.pkt_cnt
= 0;
2950 tracks
[i
].audio
.sub_packet_cnt
= 0;
2951 tracks
[i
].audio
.buf_timecode
= AV_NOPTS_VALUE
;
2952 tracks
[i
].end_timecode
= 0;
2953 if (tracks
[i
].type
== MATROSKA_TRACK_TYPE_SUBTITLE
&&
2954 tracks
[i
].stream
->discard
!= AVDISCARD_ALL
) {
2955 index_sub
= av_index_search_timestamp(
2956 tracks
[i
].stream
, st
->index_entries
[index
].timestamp
,
2957 AVSEEK_FLAG_BACKWARD
);
2958 while (index_sub
>= 0 &&
2960 tracks
[i
].stream
->index_entries
[index_sub
].pos
< st
->index_entries
[index_min
].pos
&&
2961 st
->index_entries
[index
].timestamp
- tracks
[i
].stream
->index_entries
[index_sub
].timestamp
< 30000000000 / matroska
->time_scale
)
2966 avio_seek(s
->pb
, st
->index_entries
[index_min
].pos
, SEEK_SET
);
2967 matroska
->current_id
= 0;
2968 if (flags
& AVSEEK_FLAG_ANY
) {
2969 st
->skip_to_keyframe
= 0;
2970 matroska
->skip_to_timecode
= timestamp
;
2972 st
->skip_to_keyframe
= 1;
2973 matroska
->skip_to_timecode
= st
->index_entries
[index
].timestamp
;
2975 matroska
->skip_to_keyframe
= 1;
2977 matroska
->num_levels
= 0;
2978 ff_update_cur_dts(s
, st
, st
->index_entries
[index
].timestamp
);
2981 // slightly hackish but allows proper fallback to
2982 // the generic seeking code.
2983 matroska_clear_queue(matroska
);
2984 matroska
->current_id
= 0;
2985 st
->skip_to_keyframe
=
2986 matroska
->skip_to_keyframe
= 0;
2988 matroska
->num_levels
= 0;
2992 static int matroska_read_close(AVFormatContext
*s
)
2994 MatroskaDemuxContext
*matroska
= s
->priv_data
;
2995 MatroskaTrack
*tracks
= matroska
->tracks
.elem
;
2998 matroska_clear_queue(matroska
);
3000 for (n
= 0; n
< matroska
->tracks
.nb_elem
; n
++)
3001 if (tracks
[n
].type
== MATROSKA_TRACK_TYPE_AUDIO
)
3002 av_free(tracks
[n
].audio
.buf
);
3003 ebml_free(matroska_cluster
, &matroska
->current_cluster
);
3004 ebml_free(matroska_segment
, matroska
);
3010 int64_t start_time_ns
;
3011 int64_t end_time_ns
;
3012 int64_t start_offset
;
3016 /* This function searches all the Cues and returns the CueDesc corresponding the
3017 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3018 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3020 static CueDesc
get_cue_desc(AVFormatContext
*s
, int64_t ts
, int64_t cues_start
) {
3021 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3024 int nb_index_entries
= s
->streams
[0]->nb_index_entries
;
3025 AVIndexEntry
*index_entries
= s
->streams
[0]->index_entries
;
3026 if (ts
>= matroska
->duration
* matroska
->time_scale
) return (CueDesc
) {-1, -1, -1, -1};
3027 for (i
= 1; i
< nb_index_entries
; i
++) {
3028 if (index_entries
[i
- 1].timestamp
* matroska
->time_scale
<= ts
&&
3029 index_entries
[i
].timestamp
* matroska
->time_scale
> ts
) {
3034 cue_desc
.start_time_ns
= index_entries
[i
].timestamp
* matroska
->time_scale
;
3035 cue_desc
.start_offset
= index_entries
[i
].pos
- matroska
->segment_start
;
3036 if (i
!= nb_index_entries
- 1) {
3037 cue_desc
.end_time_ns
= index_entries
[i
+ 1].timestamp
* matroska
->time_scale
;
3038 cue_desc
.end_offset
= index_entries
[i
+ 1].pos
- matroska
->segment_start
;
3040 cue_desc
.end_time_ns
= matroska
->duration
* matroska
->time_scale
;
3041 // FIXME: this needs special handling for files where Cues appear
3042 // before Clusters. the current logic assumes Cues appear after
3044 cue_desc
.end_offset
= cues_start
- matroska
->segment_start
;
3049 static int webm_clusters_start_with_keyframe(AVFormatContext
*s
)
3051 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3052 int64_t cluster_pos
, before_pos
;
3054 if (s
->streams
[0]->nb_index_entries
<= 0) return 0;
3055 // seek to the first cluster using cues.
3056 index
= av_index_search_timestamp(s
->streams
[0], 0, 0);
3057 if (index
< 0) return 0;
3058 cluster_pos
= s
->streams
[0]->index_entries
[index
].pos
;
3059 before_pos
= avio_tell(s
->pb
);
3061 int64_t cluster_id
= 0, cluster_length
= 0;
3063 avio_seek(s
->pb
, cluster_pos
, SEEK_SET
);
3064 // read cluster id and length
3065 ebml_read_num(matroska
, matroska
->ctx
->pb
, 4, &cluster_id
);
3066 ebml_read_length(matroska
, matroska
->ctx
->pb
, &cluster_length
);
3067 if (cluster_id
!= 0xF43B675) { // done with all clusters
3070 avio_seek(s
->pb
, cluster_pos
, SEEK_SET
);
3071 matroska
->current_id
= 0;
3072 matroska_clear_queue(matroska
);
3073 if (matroska_parse_cluster(matroska
) < 0 ||
3074 matroska
->num_packets
<= 0) {
3077 pkt
= matroska
->packets
[0];
3078 cluster_pos
+= cluster_length
+ 12; // 12 is the offset of the cluster id and length.
3079 if (!(pkt
->flags
& AV_PKT_FLAG_KEY
)) {
3084 avio_seek(s
->pb
, before_pos
, SEEK_SET
);
3088 static int buffer_size_after_time_downloaded(int64_t time_ns
, double search_sec
, int64_t bps
,
3089 double min_buffer
, double* buffer
,
3090 double* sec_to_download
, AVFormatContext
*s
,
3093 double nano_seconds_per_second
= 1000000000.0;
3094 double time_sec
= time_ns
/ nano_seconds_per_second
;
3096 int64_t time_to_search_ns
= (int64_t)(search_sec
* nano_seconds_per_second
);
3097 int64_t end_time_ns
= time_ns
+ time_to_search_ns
;
3098 double sec_downloaded
= 0.0;
3099 CueDesc desc_curr
= get_cue_desc(s
, time_ns
, cues_start
);
3100 if (desc_curr
.start_time_ns
== -1)
3102 *sec_to_download
= 0.0;
3104 // Check for non cue start time.
3105 if (time_ns
> desc_curr
.start_time_ns
) {
3106 int64_t cue_nano
= desc_curr
.end_time_ns
- time_ns
;
3107 double percent
= (double)(cue_nano
) / (desc_curr
.end_time_ns
- desc_curr
.start_time_ns
);
3108 double cueBytes
= (desc_curr
.end_offset
- desc_curr
.start_offset
) * percent
;
3109 double timeToDownload
= (cueBytes
* 8.0) / bps
;
3111 sec_downloaded
+= (cue_nano
/ nano_seconds_per_second
) - timeToDownload
;
3112 *sec_to_download
+= timeToDownload
;
3114 // Check if the search ends within the first cue.
3115 if (desc_curr
.end_time_ns
>= end_time_ns
) {
3116 double desc_end_time_sec
= desc_curr
.end_time_ns
/ nano_seconds_per_second
;
3117 double percent_to_sub
= search_sec
/ (desc_end_time_sec
- time_sec
);
3118 sec_downloaded
= percent_to_sub
* sec_downloaded
;
3119 *sec_to_download
= percent_to_sub
* *sec_to_download
;
3122 if ((sec_downloaded
+ *buffer
) <= min_buffer
) {
3126 // Get the next Cue.
3127 desc_curr
= get_cue_desc(s
, desc_curr
.end_time_ns
, cues_start
);
3130 while (desc_curr
.start_time_ns
!= -1) {
3131 int64_t desc_bytes
= desc_curr
.end_offset
- desc_curr
.start_offset
;
3132 int64_t desc_ns
= desc_curr
.end_time_ns
- desc_curr
.start_time_ns
;
3133 double desc_sec
= desc_ns
/ nano_seconds_per_second
;
3134 double bits
= (desc_bytes
* 8.0);
3135 double time_to_download
= bits
/ bps
;
3137 sec_downloaded
+= desc_sec
- time_to_download
;
3138 *sec_to_download
+= time_to_download
;
3140 if (desc_curr
.end_time_ns
>= end_time_ns
) {
3141 double desc_end_time_sec
= desc_curr
.end_time_ns
/ nano_seconds_per_second
;
3142 double percent_to_sub
= search_sec
/ (desc_end_time_sec
- time_sec
);
3143 sec_downloaded
= percent_to_sub
* sec_downloaded
;
3144 *sec_to_download
= percent_to_sub
* *sec_to_download
;
3146 if ((sec_downloaded
+ *buffer
) <= min_buffer
)
3151 if ((sec_downloaded
+ *buffer
) <= min_buffer
) {
3156 desc_curr
= get_cue_desc(s
, desc_curr
.end_time_ns
, cues_start
);
3158 *buffer
= *buffer
+ sec_downloaded
;
3162 /* This function computes the bandwidth of the WebM file with the help of
3163 * buffer_size_after_time_downloaded() function. Both of these functions are
3164 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3165 * Matroska parsing mechanism.
3167 * Returns the bandwidth of the file on success; -1 on error.
3169 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext
*s
, int64_t cues_start
)
3171 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3172 AVStream
*st
= s
->streams
[0];
3173 double bandwidth
= 0.0;
3176 for (i
= 0; i
< st
->nb_index_entries
; i
++) {
3177 int64_t prebuffer_ns
= 1000000000;
3178 int64_t time_ns
= st
->index_entries
[i
].timestamp
* matroska
->time_scale
;
3179 double nano_seconds_per_second
= 1000000000.0;
3180 int64_t prebuffered_ns
= time_ns
+ prebuffer_ns
;
3181 double prebuffer_bytes
= 0.0;
3182 int64_t temp_prebuffer_ns
= prebuffer_ns
;
3183 int64_t pre_bytes
, pre_ns
;
3184 double pre_sec
, prebuffer
, bits_per_second
;
3185 CueDesc desc_beg
= get_cue_desc(s
, time_ns
, cues_start
);
3187 // Start with the first Cue.
3188 CueDesc desc_end
= desc_beg
;
3190 // Figure out how much data we have downloaded for the prebuffer. This will
3191 // be used later to adjust the bits per sample to try.
3192 while (desc_end
.start_time_ns
!= -1 && desc_end
.end_time_ns
< prebuffered_ns
) {
3193 // Prebuffered the entire Cue.
3194 prebuffer_bytes
+= desc_end
.end_offset
- desc_end
.start_offset
;
3195 temp_prebuffer_ns
-= desc_end
.end_time_ns
- desc_end
.start_time_ns
;
3196 desc_end
= get_cue_desc(s
, desc_end
.end_time_ns
, cues_start
);
3198 if (desc_end
.start_time_ns
== -1) {
3199 // The prebuffer is larger than the duration.
3200 if (matroska
->duration
* matroska
->time_scale
>= prebuffered_ns
)
3202 bits_per_second
= 0.0;
3204 // The prebuffer ends in the last Cue. Estimate how much data was
3206 pre_bytes
= desc_end
.end_offset
- desc_end
.start_offset
;
3207 pre_ns
= desc_end
.end_time_ns
- desc_end
.start_time_ns
;
3208 pre_sec
= pre_ns
/ nano_seconds_per_second
;
3210 pre_bytes
* ((temp_prebuffer_ns
/ nano_seconds_per_second
) / pre_sec
);
3212 prebuffer
= prebuffer_ns
/ nano_seconds_per_second
;
3214 // Set this to 0.0 in case our prebuffer buffers the entire video.
3215 bits_per_second
= 0.0;
3217 int64_t desc_bytes
= desc_end
.end_offset
- desc_beg
.start_offset
;
3218 int64_t desc_ns
= desc_end
.end_time_ns
- desc_beg
.start_time_ns
;
3219 double desc_sec
= desc_ns
/ nano_seconds_per_second
;
3220 double calc_bits_per_second
= (desc_bytes
* 8) / desc_sec
;
3222 // Drop the bps by the percentage of bytes buffered.
3223 double percent
= (desc_bytes
- prebuffer_bytes
) / desc_bytes
;
3224 double mod_bits_per_second
= calc_bits_per_second
* percent
;
3226 if (prebuffer
< desc_sec
) {
3228 (double)(matroska
->duration
* matroska
->time_scale
) / nano_seconds_per_second
;
3230 // Add 1 so the bits per second should be a little bit greater than file
3232 int64_t bps
= (int64_t)(mod_bits_per_second
) + 1;
3233 const double min_buffer
= 0.0;
3234 double buffer
= prebuffer
;
3235 double sec_to_download
= 0.0;
3237 int rv
= buffer_size_after_time_downloaded(prebuffered_ns
, search_sec
, bps
,
3238 min_buffer
, &buffer
, &sec_to_download
,
3242 } else if (rv
== 0) {
3243 bits_per_second
= (double)(bps
);
3248 desc_end
= get_cue_desc(s
, desc_end
.end_time_ns
, cues_start
);
3249 } while (desc_end
.start_time_ns
!= -1);
3251 if (bandwidth
< bits_per_second
) bandwidth
= bits_per_second
;
3253 return (int64_t)bandwidth
;
3256 static int webm_dash_manifest_cues(AVFormatContext
*s
)
3258 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3259 EbmlList
*seekhead_list
= &matroska
->seekhead
;
3260 MatroskaSeekhead
*seekhead
= seekhead_list
->elem
;
3262 int64_t cues_start
= -1, cues_end
= -1, before_pos
, bandwidth
;
3265 // determine cues start and end positions
3266 for (i
= 0; i
< seekhead_list
->nb_elem
; i
++)
3267 if (seekhead
[i
].id
== MATROSKA_ID_CUES
)
3270 if (i
>= seekhead_list
->nb_elem
) return -1;
3272 before_pos
= avio_tell(matroska
->ctx
->pb
);
3273 cues_start
= seekhead
[i
].pos
+ matroska
->segment_start
;
3274 if (avio_seek(matroska
->ctx
->pb
, cues_start
, SEEK_SET
) == cues_start
) {
3275 // cues_end is computed as cues_start + cues_length + length of the
3276 // Cues element ID + EBML length of the Cues element. cues_end is
3277 // inclusive and the above sum is reduced by 1.
3278 uint64_t cues_length
= 0, cues_id
= 0, bytes_read
= 0;
3279 bytes_read
+= ebml_read_num(matroska
, matroska
->ctx
->pb
, 4, &cues_id
);
3280 bytes_read
+= ebml_read_length(matroska
, matroska
->ctx
->pb
, &cues_length
);
3281 cues_end
= cues_start
+ cues_length
+ bytes_read
- 1;
3283 avio_seek(matroska
->ctx
->pb
, before_pos
, SEEK_SET
);
3284 if (cues_start
== -1 || cues_end
== -1) return -1;
3287 matroska_parse_cues(matroska
);
3290 av_dict_set_int(&s
->streams
[0]->metadata
, CUES_START
, cues_start
, 0);
3293 av_dict_set_int(&s
->streams
[0]->metadata
, CUES_END
, cues_end
, 0);
3296 bandwidth
= webm_dash_manifest_compute_bandwidth(s
, cues_start
);
3297 if (bandwidth
< 0) return -1;
3298 av_dict_set_int(&s
->streams
[0]->metadata
, BANDWIDTH
, bandwidth
, 0);
3300 // check if all clusters start with key frames
3301 av_dict_set_int(&s
->streams
[0]->metadata
, CLUSTER_KEYFRAME
, webm_clusters_start_with_keyframe(s
), 0);
3303 // store cue point timestamps as a comma separated list for checking subsegment alignment in
3304 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
3305 buf
= av_malloc(s
->streams
[0]->nb_index_entries
* 20 * sizeof(char));
3306 if (!buf
) return -1;
3308 for (i
= 0; i
< s
->streams
[0]->nb_index_entries
; i
++) {
3309 snprintf(buf
, (i
+ 1) * 20 * sizeof(char),
3310 "%s%" PRId64
, buf
, s
->streams
[0]->index_entries
[i
].timestamp
);
3311 if (i
!= s
->streams
[0]->nb_index_entries
- 1)
3312 strncat(buf
, ",", sizeof(char));
3314 av_dict_set(&s
->streams
[0]->metadata
, CUE_TIMESTAMPS
, buf
, 0);
3320 static int webm_dash_manifest_read_header(AVFormatContext
*s
)
3323 int ret
= matroska_read_header(s
);
3324 MatroskaTrack
*tracks
;
3325 MatroskaDemuxContext
*matroska
= s
->priv_data
;
3327 av_log(s
, AV_LOG_ERROR
, "Failed to read file headers\n");
3331 // initialization range
3332 // 5 is the offset of Cluster ID.
3333 av_dict_set_int(&s
->streams
[0]->metadata
, INITIALIZATION_RANGE
, avio_tell(s
->pb
) - 5, 0);
3335 // basename of the file
3336 buf
= strrchr(s
->filename
, '/');
3337 av_dict_set(&s
->streams
[0]->metadata
, FILENAME
, buf
? ++buf
: s
->filename
, 0);
3340 buf
= av_asprintf("%g", matroska
->duration
);
3341 if (!buf
) return AVERROR(ENOMEM
);
3342 av_dict_set(&s
->streams
[0]->metadata
, DURATION
, buf
, 0);
3346 tracks
= matroska
->tracks
.elem
;
3347 av_dict_set_int(&s
->streams
[0]->metadata
, TRACK_NUMBER
, tracks
[0].num
, 0);
3349 // parse the cues and populate Cue related fields
3350 return webm_dash_manifest_cues(s
);
3353 static int webm_dash_manifest_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
3358 AVInputFormat ff_matroska_demuxer
= {
3359 .name
= "matroska,webm",
3360 .long_name
= NULL_IF_CONFIG_SMALL("Matroska / WebM"),
3361 .extensions
= "mkv,mk3d,mka,mks",
3362 .priv_data_size
= sizeof(MatroskaDemuxContext
),
3363 .read_probe
= matroska_probe
,
3364 .read_header
= matroska_read_header
,
3365 .read_packet
= matroska_read_packet
,
3366 .read_close
= matroska_read_close
,
3367 .read_seek
= matroska_read_seek
,
3368 .mime_type
= "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
3371 AVInputFormat ff_webm_dash_manifest_demuxer
= {
3372 .name
= "webm_dash_manifest",
3373 .long_name
= NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
3374 .priv_data_size
= sizeof(MatroskaDemuxContext
),
3375 .read_header
= webm_dash_manifest_read_header
,
3376 .read_packet
= webm_dash_manifest_read_packet
,
3377 .read_close
= matroska_read_close
,