2 * Matroska file demuxer
3 * Copyright (c) 2003-2008 The FFmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Matroska file demuxer
25 * @author Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * @author with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * @author totally reworked by Aurelien Jacobs <aurel@gnuage.org>
28 * @see specs available on the Matroska project page: http://www.matroska.org/
36 #include "libavutil/avstring.h"
37 #include "libavutil/base64.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/intfloat.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/lzo.h"
42 #include "libavutil/mastering_display_metadata.h"
43 #include "libavutil/mathematics.h"
44 #include "libavutil/opt.h"
45 #include "libavutil/time_internal.h"
46 #include "libavutil/spherical.h"
48 #include "libavcodec/bytestream.h"
49 #include "libavcodec/flac.h"
50 #include "libavcodec/mpeg4audio.h"
53 #include "avio_internal.h"
58 /* For ff_codec_get_id(). */
69 #include "qtpalette.h"
71 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
72 #define NEEDS_CHECKING 2 /* Indicates that some error checks
73 * still need to be performed */
74 #define LEVEL_ENDED 3 /* return value of ebml_parse when the
75 * syntax level used for parsing ended. */
76 #define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
77 * of unkown, potentially damaged data is encountered,
78 * it is considered an error. */
79 #define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
80 * to this many bytes of unknown data for the
81 * SKIP_THRESHOLD check. */
97 typedef const struct EbmlSyntax {
100 size_t list_elem_size;
107 const struct EbmlSyntax *n;
111 typedef struct EbmlList {
113 unsigned int alloc_elem_size;
117 typedef struct EbmlBin {
124 typedef struct Ebml {
129 uint64_t doctype_version;
132 typedef struct MatroskaTrackCompression {
135 } MatroskaTrackCompression;
137 typedef struct MatroskaTrackEncryption {
140 } MatroskaTrackEncryption;
142 typedef struct MatroskaTrackEncoding {
145 MatroskaTrackCompression compression;
146 MatroskaTrackEncryption encryption;
147 } MatroskaTrackEncoding;
149 typedef struct MatroskaMasteringMeta {
158 double max_luminance;
159 double min_luminance;
160 } MatroskaMasteringMeta;
162 typedef struct MatroskaTrackVideoColor {
163 uint64_t matrix_coefficients;
164 uint64_t bits_per_channel;
165 uint64_t chroma_sub_horz;
166 uint64_t chroma_sub_vert;
167 uint64_t cb_sub_horz;
168 uint64_t cb_sub_vert;
169 uint64_t chroma_siting_horz;
170 uint64_t chroma_siting_vert;
172 uint64_t transfer_characteristics;
176 MatroskaMasteringMeta mastering_meta;
177 } MatroskaTrackVideoColor;
179 typedef struct MatroskaTrackVideoProjection {
185 } MatroskaTrackVideoProjection;
187 typedef struct MatroskaTrackVideo {
189 uint64_t display_width;
190 uint64_t display_height;
191 uint64_t pixel_width;
192 uint64_t pixel_height;
194 uint64_t display_unit;
196 uint64_t field_order;
197 uint64_t stereo_mode;
200 MatroskaTrackVideoProjection projection;
201 } MatroskaTrackVideo;
203 typedef struct MatroskaTrackAudio {
205 double out_samplerate;
209 /* real audio header (extracted from extradata) */
216 uint64_t buf_timecode;
218 } MatroskaTrackAudio;
220 typedef struct MatroskaTrackPlane {
223 } MatroskaTrackPlane;
225 typedef struct MatroskaTrackOperation {
226 EbmlList combine_planes;
227 } MatroskaTrackOperation;
229 typedef struct MatroskaTrack {
238 uint64_t default_duration;
239 uint64_t flag_default;
240 uint64_t flag_forced;
241 uint64_t seek_preroll;
242 MatroskaTrackVideo video;
243 MatroskaTrackAudio audio;
244 MatroskaTrackOperation operation;
246 uint64_t codec_delay;
247 uint64_t codec_delay_in_track_tb;
250 int64_t end_timecode;
252 uint64_t max_block_additional_id;
254 uint32_t palette[AVPALETTE_COUNT];
258 typedef struct MatroskaAttachment {
265 } MatroskaAttachment;
267 typedef struct MatroskaChapter {
276 typedef struct MatroskaIndexPos {
281 typedef struct MatroskaIndex {
286 typedef struct MatroskaTag {
294 typedef struct MatroskaTagTarget {
302 typedef struct MatroskaTags {
303 MatroskaTagTarget target;
307 typedef struct MatroskaSeekhead {
312 typedef struct MatroskaLevel {
317 typedef struct MatroskaBlock {
322 uint64_t additional_id;
324 int64_t discard_padding;
327 typedef struct MatroskaCluster {
333 typedef struct MatroskaLevel1Element {
337 } MatroskaLevel1Element;
339 typedef struct MatroskaDemuxContext {
340 const AVClass *class;
341 AVFormatContext *ctx;
344 MatroskaLevel levels[EBML_MAX_DEPTH];
356 EbmlList attachments;
362 /* byte position of the segment inside the stream */
363 int64_t segment_start;
365 /* the packet queue */
367 AVPacketList *queue_end;
371 /* What to skip before effectively reading a packet. */
372 int skip_to_keyframe;
373 uint64_t skip_to_timecode;
375 /* File has a CUES element, but we defer parsing until it is needed. */
376 int cues_parsing_deferred;
378 /* Level1 elements and whether they were read yet */
379 MatroskaLevel1Element level1_elems[64];
380 int num_level1_elems;
382 MatroskaCluster current_cluster;
384 /* WebM DASH Manifest live flag */
387 /* Bandwidth value for WebM DASH Manifest */
389 } MatroskaDemuxContext;
391 #define CHILD_OF(parent) { .def = { .n = parent } }
393 // The following forward declarations need their size because
394 // a tentative definition with internal linkage must not be an
395 // incomplete type (6.7.2 in C90, 6.9.2 in C99).
396 // Removing the sizes breaks MSVC.
397 static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
398 matroska_track[27], matroska_track_encoding[6], matroska_track_encodings[2],
399 matroska_track_combine_planes[2], matroska_track_operation[2], matroska_tracks[2],
400 matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
401 matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
402 matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
404 static EbmlSyntax ebml_header[] = {
405 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
406 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml, max_size), { .u = 8 } },
407 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml, id_length), { .u = 4 } },
408 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
409 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
410 { EBML_ID_EBMLVERSION, EBML_NONE },
411 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
412 CHILD_OF(ebml_syntax)
415 static EbmlSyntax ebml_syntax[] = {
416 { EBML_ID_HEADER, EBML_NEST, 0, 0, { .n = ebml_header } },
417 { MATROSKA_ID_SEGMENT, EBML_STOP },
421 static EbmlSyntax matroska_info[] = {
422 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
423 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext, duration) },
424 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, title) },
425 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
426 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, offsetof(MatroskaDemuxContext, muxingapp) },
427 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, offsetof(MatroskaDemuxContext, date_utc) },
428 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
429 CHILD_OF(matroska_segment)
432 static EbmlSyntax matroska_mastering_meta[] = {
433 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_x), { .f=-1 } },
434 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, r_y), { .f=-1 } },
435 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_x), { .f=-1 } },
436 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, g_y), { .f=-1 } },
437 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_x), { .f=-1 } },
438 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, b_y), { .f=-1 } },
439 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_x), { .f=-1 } },
440 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, white_y), { .f=-1 } },
441 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, min_luminance), { .f=-1 } },
442 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, offsetof(MatroskaMasteringMeta, max_luminance), { .f=-1 } },
443 CHILD_OF(matroska_track_video_color)
446 static EbmlSyntax matroska_track_video_color[] = {
447 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
448 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u=0 } },
449 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz), { .u=0 } },
450 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert), { .u=0 } },
451 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz), { .u=0 } },
452 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert), { .u=0 } },
453 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
454 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
455 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
456 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
457 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
458 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_cll), { .u=0 } },
459 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, offsetof(MatroskaTrackVideoColor, max_fall), { .u=0 } },
460 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
461 CHILD_OF(matroska_track_video)
464 static EbmlSyntax matroska_track_video_projection[] = {
465 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
466 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrackVideoProjection, private) },
467 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f=0.0 } },
468 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f=0.0 } },
469 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f=0.0 } },
470 CHILD_OF(matroska_track_video)
473 static EbmlSyntax matroska_track_video[] = {
474 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, offsetof(MatroskaTrackVideo, frame_rate) },
475 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
476 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
477 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_width) },
478 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, pixel_height) },
479 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, offsetof(MatroskaTrackVideo, color_space) },
480 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, alpha_mode) },
481 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
482 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
483 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
484 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
485 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
486 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
487 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
488 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
489 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
490 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
491 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
492 CHILD_OF(matroska_track)
495 static EbmlSyntax matroska_track_audio[] = {
496 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
497 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
498 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio, bitdepth) },
499 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
500 CHILD_OF(matroska_track)
503 static EbmlSyntax matroska_track_encoding_compression[] = {
504 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression, algo), { .u = 0 } },
505 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, offsetof(MatroskaTrackCompression, settings) },
506 CHILD_OF(matroska_track_encoding)
509 static EbmlSyntax matroska_track_encoding_encryption[] = {
510 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
511 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, offsetof(MatroskaTrackEncryption,key_id) },
512 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
513 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
514 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
515 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
516 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
517 CHILD_OF(matroska_track_encoding)
519 static EbmlSyntax matroska_track_encoding[] = {
520 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
521 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
522 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
523 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
524 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
525 CHILD_OF(matroska_track_encodings)
528 static EbmlSyntax matroska_track_encodings[] = {
529 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
530 CHILD_OF(matroska_track)
533 static EbmlSyntax matroska_track_plane[] = {
534 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, offsetof(MatroskaTrackPlane,uid) },
535 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, offsetof(MatroskaTrackPlane,type) },
536 CHILD_OF(matroska_track_combine_planes)
539 static EbmlSyntax matroska_track_combine_planes[] = {
540 { MATROSKA_ID_TRACKPLANE, EBML_NEST, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
541 CHILD_OF(matroska_track_operation)
544 static EbmlSyntax matroska_track_operation[] = {
545 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, {.n = matroska_track_combine_planes} },
546 CHILD_OF(matroska_track)
549 static EbmlSyntax matroska_track[] = {
550 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack, num) },
551 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack, name) },
552 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack, uid) },
553 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack, type) },
554 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack, codec_id) },
555 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack, codec_priv) },
556 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, offsetof(MatroskaTrack, codec_delay) },
557 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
558 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack, default_duration) },
559 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
560 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
561 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
562 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
563 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
564 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
565 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, { .n = matroska_track_encodings } },
566 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, offsetof(MatroskaTrack, max_block_additional_id) },
567 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, offsetof(MatroskaTrack, seek_preroll) },
568 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
569 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
570 { MATROSKA_ID_CODECNAME, EBML_NONE },
571 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
572 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
573 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
574 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
575 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
576 CHILD_OF(matroska_tracks)
579 static EbmlSyntax matroska_tracks[] = {
580 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
581 CHILD_OF(matroska_segment)
584 static EbmlSyntax matroska_attachment[] = {
585 { MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachment, uid) },
586 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachment, filename) },
587 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachment, mime) },
588 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachment, bin) },
589 { MATROSKA_ID_FILEDESC, EBML_NONE },
590 CHILD_OF(matroska_attachments)
593 static EbmlSyntax matroska_attachments[] = {
594 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
595 CHILD_OF(matroska_segment)
598 static EbmlSyntax matroska_chapter_display[] = {
599 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter, title) },
600 { MATROSKA_ID_CHAPLANG, EBML_NONE },
601 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
602 CHILD_OF(matroska_chapter_entry)
605 static EbmlSyntax matroska_chapter_entry[] = {
606 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
607 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
608 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter, uid) },
609 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, { .n = matroska_chapter_display } },
610 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
611 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
612 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
613 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
614 CHILD_OF(matroska_chapter)
617 static EbmlSyntax matroska_chapter[] = {
618 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
619 { MATROSKA_ID_EDITIONUID, EBML_NONE },
620 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
621 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
622 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
623 CHILD_OF(matroska_chapters)
626 static EbmlSyntax matroska_chapters[] = {
627 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, { .n = matroska_chapter } },
628 CHILD_OF(matroska_segment)
631 static EbmlSyntax matroska_index_pos[] = {
632 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos, track) },
633 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos, pos) },
634 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
635 { MATROSKA_ID_CUEDURATION, EBML_NONE },
636 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
637 CHILD_OF(matroska_index_entry)
640 static EbmlSyntax matroska_index_entry[] = {
641 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex, time) },
642 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
643 CHILD_OF(matroska_index)
646 static EbmlSyntax matroska_index[] = {
647 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
648 CHILD_OF(matroska_segment)
651 static EbmlSyntax matroska_simpletag[] = {
652 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag, name) },
653 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag, string) },
654 { MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
655 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag, def) },
656 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, offsetof(MatroskaTag, def) },
657 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
658 CHILD_OF(matroska_tag)
661 static EbmlSyntax matroska_tagtargets[] = {
662 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget, type) },
663 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
664 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, trackuid) },
665 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, chapteruid) },
666 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget, attachuid) },
667 CHILD_OF(matroska_tag)
670 static EbmlSyntax matroska_tag[] = {
671 { MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
672 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
673 CHILD_OF(matroska_tags)
676 static EbmlSyntax matroska_tags[] = {
677 { MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
678 CHILD_OF(matroska_segment)
681 static EbmlSyntax matroska_seekhead_entry[] = {
682 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead, id) },
683 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
684 CHILD_OF(matroska_seekhead)
687 static EbmlSyntax matroska_seekhead[] = {
688 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
689 CHILD_OF(matroska_segment)
692 static EbmlSyntax matroska_segment[] = {
693 { MATROSKA_ID_CLUSTER, EBML_STOP },
694 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, { .n = matroska_info } },
695 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, { .n = matroska_tracks } },
696 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, { .n = matroska_attachments } },
697 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, { .n = matroska_chapters } },
698 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, { .n = matroska_index } },
699 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, { .n = matroska_tags } },
700 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, { .n = matroska_seekhead } },
701 { 0 } /* We don't want to go back to level 0, so don't add the parent. */
704 static EbmlSyntax matroska_segments[] = {
705 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, { .n = matroska_segment } },
709 static EbmlSyntax matroska_blockmore[] = {
710 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, offsetof(MatroskaBlock,additional_id) },
711 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, offsetof(MatroskaBlock,additional) },
712 CHILD_OF(matroska_blockadditions)
715 static EbmlSyntax matroska_blockadditions[] = {
716 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, {.n = matroska_blockmore} },
717 CHILD_OF(matroska_blockgroup)
720 static EbmlSyntax matroska_blockgroup[] = {
721 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
722 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, { .n = matroska_blockadditions} },
723 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock, duration) },
724 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, offsetof(MatroskaBlock, discard_padding) },
725 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 0, offsetof(MatroskaBlock, reference), { .i = INT64_MIN } },
726 { MATROSKA_ID_CODECSTATE, EBML_NONE },
727 { 1, EBML_UINT, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
728 CHILD_OF(matroska_cluster_parsing)
731 // The following array contains SimpleBlock and BlockGroup twice
732 // in order to reuse the other values for matroska_cluster_enter.
733 static EbmlSyntax matroska_cluster_parsing[] = {
734 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock, bin) },
735 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, { .n = matroska_blockgroup } },
736 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, offsetof(MatroskaCluster, timecode) },
737 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
738 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
739 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
740 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
741 CHILD_OF(matroska_segment)
744 static EbmlSyntax matroska_cluster_enter[] = {
745 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, { .n = &matroska_cluster_parsing[2] } },
750 static const char *const matroska_doctypes[] = { "matroska", "webm" };
752 static int matroska_read_close(AVFormatContext *s);
755 * This function prepares the status for parsing of level 1 elements.
757 static int matroska_reset_status(MatroskaDemuxContext *matroska,
758 uint32_t id, int64_t position)
761 int64_t err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
766 matroska->current_id = id;
767 matroska->num_levels = 1;
768 matroska->unknown_count = 0;
769 matroska->resync_pos = avio_tell(matroska->ctx->pb);
771 matroska->resync_pos -= (av_log2(id) + 7) / 8;
776 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
778 AVIOContext *pb = matroska->ctx->pb;
781 /* Try to seek to the last position to resync from. If this doesn't work,
782 * we resync from the earliest position available: The start of the buffer. */
783 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
784 av_log(matroska->ctx, AV_LOG_WARNING,
785 "Seek to desired resync point failed. Seeking to "
786 "earliest point available instead.\n");
787 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
788 last_pos + 1), SEEK_SET);
793 // try to find a toplevel element
794 while (!avio_feof(pb)) {
795 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
796 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
797 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
798 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
799 /* Prepare the context for parsing of a level 1 element. */
800 matroska_reset_status(matroska, id, -1);
801 /* Given that we are here means that an error has occurred,
802 * so treat the segment as unknown length in order not to
803 * discard valid data that happens to be beyond the designated
804 * end of the segment. */
805 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
808 id = (id << 8) | avio_r8(pb);
812 return pb->error ? pb->error : AVERROR_EOF;
816 * Read: an "EBML number", which is defined as a variable-length
817 * array of bytes. The first byte indicates the length by giving a
818 * number of 0-bits followed by a one. The position of the first
819 * "one" bit inside the first byte indicates the length of this
821 * Returns: number of bytes read, < 0 on error
823 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
824 int max_size, uint64_t *number, int eof_forbidden)
830 /* The first byte tells us the length in bytes - except when it is zero. */
835 /* get the length of the EBML number */
836 read = 8 - ff_log2_tab[total];
838 if (!total || read > max_size) {
839 pos = avio_tell(pb) - 1;
841 av_log(matroska->ctx, AV_LOG_ERROR,
842 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
843 "of an EBML number\n", pos, pos);
845 av_log(matroska->ctx, AV_LOG_ERROR,
846 "Length %d indicated by an EBML number's first byte 0x%02x "
847 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
848 read, (uint8_t) total, pos, pos, max_size);
850 return AVERROR_INVALIDDATA;
853 /* read out length */
854 total ^= 1 << ff_log2_tab[total];
856 total = (total << 8) | avio_r8(pb);
858 if (pb->eof_reached) {
870 av_log(matroska->ctx, AV_LOG_ERROR,
871 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
876 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
877 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
884 * Read a EBML length value.
885 * This needs special handling for the "unknown length" case which has multiple
888 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
891 int res = ebml_read_num(matroska, pb, 8, number, 1);
892 if (res > 0 && *number + 1 == 1ULL << (7 * res))
893 *number = EBML_UNKNOWN_LENGTH;
898 * Read the next element as an unsigned int.
899 * Returns NEEDS_CHECKING.
901 static int ebml_read_uint(AVIOContext *pb, int size, uint64_t *num)
905 /* big-endian ordering; build up number */
908 *num = (*num << 8) | avio_r8(pb);
910 return NEEDS_CHECKING;
914 * Read the next element as a signed int.
915 * Returns NEEDS_CHECKING.
917 static int ebml_read_sint(AVIOContext *pb, int size, int64_t *num)
924 *num = sign_extend(avio_r8(pb), 8);
926 /* big-endian ordering; build up number */
928 *num = ((uint64_t)*num << 8) | avio_r8(pb);
931 return NEEDS_CHECKING;
935 * Read the next element as a float.
936 * Returns NEEDS_CHECKING or < 0 on obvious failure.
938 static int ebml_read_float(AVIOContext *pb, int size, double *num)
943 *num = av_int2float(avio_rb32(pb));
945 *num = av_int2double(avio_rb64(pb));
947 return AVERROR_INVALIDDATA;
949 return NEEDS_CHECKING;
953 * Read the next element as an ASCII string.
954 * 0 is success, < 0 or NEEDS_CHECKING is failure.
956 static int ebml_read_ascii(AVIOContext *pb, int size, char **str)
961 /* EBML strings are usually not 0-terminated, so we allocate one
962 * byte more, read the string and NULL-terminate it ourselves. */
963 if (!(res = av_malloc(size + 1)))
964 return AVERROR(ENOMEM);
965 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
967 return ret < 0 ? ret : NEEDS_CHECKING;
977 * Read the next element as binary data.
978 * 0 is success, < 0 or NEEDS_CHECKING is failure.
980 static int ebml_read_binary(AVIOContext *pb, int length,
981 int64_t pos, EbmlBin *bin)
985 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
988 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
990 bin->data = bin->buf->data;
993 if ((ret = avio_read(pb, bin->data, length)) != length) {
994 av_buffer_unref(&bin->buf);
997 return ret < 0 ? ret : NEEDS_CHECKING;
1004 * Read the next element, but only the header. The contents
1005 * are supposed to be sub-elements which can be read separately.
1006 * 0 is success, < 0 is failure.
1008 static int ebml_read_master(MatroskaDemuxContext *matroska,
1009 uint64_t length, int64_t pos)
1011 MatroskaLevel *level;
1013 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1014 av_log(matroska->ctx, AV_LOG_ERROR,
1015 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1016 return AVERROR(ENOSYS);
1019 level = &matroska->levels[matroska->num_levels++];
1021 level->length = length;
1027 * Read signed/unsigned "EBML" numbers.
1028 * Return: number of bytes processed, < 0 on error
1030 static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
1031 uint8_t *data, uint32_t size, uint64_t *num)
1034 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
1035 return ebml_read_num(matroska, &pb, FFMIN(size, 8), num, 1);
1039 * Same as above, but signed.
1041 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1042 uint8_t *data, uint32_t size, int64_t *num)
1047 /* read as unsigned number first */
1048 if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
1051 /* make signed (weird way) */
1052 *num = unum - ((1LL << (7 * res - 1)) - 1);
1057 static int ebml_parse(MatroskaDemuxContext *matroska,
1058 EbmlSyntax *syntax, void *data);
1060 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1064 // Whoever touches this should be aware of the duplication
1065 // existing in matroska_cluster_parsing.
1066 for (i = 0; syntax[i].id; i++)
1067 if (id == syntax[i].id)
1073 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1079 for (int i = 0; syntax[i].id; i++)
1080 switch (syntax[i].type) {
1082 *(uint64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.u;
1085 *(int64_t *) ((char *) data + syntax[i].data_offset) = syntax[i].def.i;
1088 *(double *) ((char *) data + syntax[i].data_offset) = syntax[i].def.f;
1092 // the default may be NULL
1093 if (syntax[i].def.s) {
1094 uint8_t **dst = (uint8_t **) ((uint8_t *) data + syntax[i].data_offset);
1095 *dst = av_strdup(syntax[i].def.s);
1097 return AVERROR(ENOMEM);
1102 if (!matroska->levels[matroska->num_levels - 1].length) {
1103 matroska->num_levels--;
1109 res = ebml_parse(matroska, syntax, data);
1112 return res == LEVEL_ENDED ? 0 : res;
1115 static int is_ebml_id_valid(uint32_t id)
1117 // Due to endian nonsense in Matroska, the highest byte with any bits set
1118 // will contain the leading length bit. This bit in turn identifies the
1119 // total byte length of the element by its position within the byte.
1120 unsigned int bits = av_log2(id);
1121 return id && (bits + 7) / 8 == (8 - bits % 8);
1125 * Allocate and return the entry for the level1 element with the given ID. If
1126 * an entry already exists, return the existing entry.
1128 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1132 MatroskaLevel1Element *elem;
1134 if (!is_ebml_id_valid(id))
1137 // Some files link to all clusters; useless.
1138 if (id == MATROSKA_ID_CLUSTER)
1141 // There can be multiple seekheads.
1142 if (id != MATROSKA_ID_SEEKHEAD) {
1143 for (i = 0; i < matroska->num_level1_elems; i++) {
1144 if (matroska->level1_elems[i].id == id)
1145 return &matroska->level1_elems[i];
1149 // Only a completely broken file would have more elements.
1150 // It also provides a low-effort way to escape from circular seekheads
1151 // (every iteration will add a level1 entry).
1152 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1153 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements or circular seekheads.\n");
1157 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1158 *elem = (MatroskaLevel1Element){.id = id};
1163 static int ebml_parse(MatroskaDemuxContext *matroska,
1164 EbmlSyntax *syntax, void *data)
1166 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1167 // Forbid unknown-length EBML_NONE elements.
1168 [EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1172 // max. 16 MB for strings
1173 [EBML_STR] = 0x1000000,
1174 [EBML_UTF8] = 0x1000000,
1175 // max. 256 MB for binary data
1176 [EBML_BIN] = 0x10000000,
1177 // no limits for anything else
1179 AVIOContext *pb = matroska->ctx->pb;
1182 int64_t pos = avio_tell(pb), pos_alt;
1183 int res, update_pos = 1, level_check;
1184 MatroskaLevel1Element *level1_elem;
1185 MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1187 if (!matroska->current_id) {
1189 res = ebml_read_num(matroska, pb, 4, &id, 0);
1191 if (pb->eof_reached && res == AVERROR_EOF) {
1192 if (matroska->is_live)
1193 // in live mode, finish parsing if EOF is reached.
1195 if (level && pos == avio_tell(pb)) {
1196 if (level->length == EBML_UNKNOWN_LENGTH) {
1197 // Unknown-length levels automatically end at EOF.
1198 matroska->num_levels--;
1201 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1202 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1208 matroska->current_id = id | 1 << 7 * res;
1209 pos_alt = pos + res;
1212 pos -= (av_log2(matroska->current_id) + 7) / 8;
1215 id = matroska->current_id;
1217 syntax = ebml_parse_id(syntax, id);
1218 if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1219 if (level && level->length == EBML_UNKNOWN_LENGTH) {
1220 // Unknown-length levels end when an element from an upper level
1221 // in the hierarchy is encountered.
1222 while (syntax->def.n) {
1223 syntax = ebml_parse_id(syntax->def.n, id);
1225 matroska->num_levels--;
1231 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1232 "%"PRId64"\n", id, pos);
1233 update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1237 data = (char *) data + syntax->data_offset;
1238 if (syntax->list_elem_size) {
1239 EbmlList *list = data;
1242 if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1243 return AVERROR(ENOMEM);
1244 newelem = av_fast_realloc(list->elem,
1245 &list->alloc_elem_size,
1246 (list->nb_elem + 1) * syntax->list_elem_size);
1248 return AVERROR(ENOMEM);
1249 list->elem = newelem;
1250 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1251 memset(data, 0, syntax->list_elem_size);
1256 if (syntax->type != EBML_STOP) {
1257 matroska->current_id = 0;
1258 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1263 if (matroska->num_levels > 0) {
1264 if (length != EBML_UNKNOWN_LENGTH &&
1265 level->length != EBML_UNKNOWN_LENGTH) {
1266 uint64_t elem_end = pos_alt + length,
1267 level_end = level->start + level->length;
1269 if (elem_end < level_end) {
1271 } else if (elem_end == level_end) {
1272 level_check = LEVEL_ENDED;
1274 av_log(matroska->ctx, AV_LOG_ERROR,
1275 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1276 "containing master element ending at 0x%"PRIx64"\n",
1277 pos, elem_end, level_end);
1278 return AVERROR_INVALIDDATA;
1280 } else if (length != EBML_UNKNOWN_LENGTH) {
1282 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1283 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1284 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1285 return AVERROR_INVALIDDATA;
1288 if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1289 || syntax->type == EBML_NEST)) {
1290 // According to the current specifications only clusters and
1291 // segments are allowed to be unknown-length. We also accept
1292 // other unknown-length master elements.
1293 av_log(matroska->ctx, AV_LOG_WARNING,
1294 "Found unknown-length element 0x%"PRIX32" other than "
1295 "a cluster at 0x%"PRIx64". Spec-incompliant, but "
1296 "parsing will nevertheless be attempted.\n", id, pos);
1303 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1304 if (length != EBML_UNKNOWN_LENGTH) {
1305 av_log(matroska->ctx, AV_LOG_ERROR,
1306 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1307 "with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1308 length, max_lengths[syntax->type], id, pos);
1309 } else if (syntax->type != EBML_NONE) {
1310 av_log(matroska->ctx, AV_LOG_ERROR,
1311 "Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1312 "unknown length, yet the length of an element of its "
1313 "type must be known.\n", id, pos);
1315 av_log(matroska->ctx, AV_LOG_ERROR,
1316 "Found unknown-length element with ID 0x%"PRIX32" at "
1317 "pos. 0x%"PRIx64" for which no syntax for parsing is "
1318 "available.\n", id, pos);
1320 return AVERROR_INVALIDDATA;
1323 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1324 // Loosing sync will likely manifest itself as encountering unknown
1325 // elements which are not reliably distinguishable from elements
1326 // belonging to future extensions of the format.
1327 // We use a heuristic to detect such situations: If the current
1328 // element is not expected at the current syntax level and there
1329 // were only a few unknown elements in a row, then the element is
1330 // skipped or considered defective based upon the length of the
1331 // current element (i.e. how much would be skipped); if there were
1332 // more than a few skipped elements in a row and skipping the current
1333 // element would lead us more than SKIP_THRESHOLD away from the last
1334 // known good position, then it is inferred that an error occurred.
1335 // The dependency on the number of unknown elements in a row exists
1336 // because the distance to the last known good position is
1337 // automatically big if the last parsed element was big.
1338 // In both cases, each unknown element is considered equivalent to
1339 // UNKNOWN_EQUIV of skipped bytes for the check.
1340 // The whole check is only done for non-seekable output, because
1341 // in this situation skipped data can't simply be rechecked later.
1342 // This is especially important when using unkown length elements
1343 // as the check for whether a child exceeds its containing master
1344 // element is not effective in this situation.
1346 matroska->unknown_count = 0;
1348 int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1350 if (matroska->unknown_count > 3)
1351 dist += pos_alt - matroska->resync_pos;
1353 if (dist > SKIP_THRESHOLD) {
1354 av_log(matroska->ctx, AV_LOG_ERROR,
1355 "Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1356 "length 0x%"PRIx64" considered as invalid data. Last "
1357 "known good position 0x%"PRIx64", %d unknown elements"
1358 " in a row\n", id, pos, length, matroska->resync_pos,
1359 matroska->unknown_count);
1360 return AVERROR_INVALIDDATA;
1365 if (update_pos > 0) {
1366 // We have found an element that is allowed at this place
1367 // in the hierarchy and it passed all checks, so treat the beginning
1368 // of the element as the "last known good" position.
1369 matroska->resync_pos = pos;
1372 if (!data && length != EBML_UNKNOWN_LENGTH)
1376 switch (syntax->type) {
1378 res = ebml_read_uint(pb, length, data);
1381 res = ebml_read_sint(pb, length, data);
1384 res = ebml_read_float(pb, length, data);
1388 res = ebml_read_ascii(pb, length, data);
1391 res = ebml_read_binary(pb, length, pos_alt, data);
1395 if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1397 if (id == MATROSKA_ID_SEGMENT)
1398 matroska->segment_start = pos_alt;
1399 if (id == MATROSKA_ID_CUES)
1400 matroska->cues_parsing_deferred = 0;
1401 if (syntax->type == EBML_LEVEL1 &&
1402 (level1_elem = matroska_find_level1_elem(matroska, syntax->id))) {
1403 if (!level1_elem->pos) {
1404 // Zero is not a valid position for a level 1 element.
1405 level1_elem->pos = pos;
1406 } else if (level1_elem->pos != pos)
1407 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1408 level1_elem->parsed = 1;
1410 if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1419 if (ffio_limit(pb, length) != length) {
1420 // ffio_limit emits its own error message,
1421 // so we don't have to.
1422 return AVERROR(EIO);
1424 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1425 // avio_skip might take us past EOF. We check for this
1426 // by skipping only length - 1 bytes, reading a byte and
1427 // checking the error flags. This is done in order to check
1428 // that the element has been properly skipped even when
1429 // no filesize (that ffio_limit relies on) is available.
1431 res = NEEDS_CHECKING;
1438 if (res == NEEDS_CHECKING) {
1439 if (pb->eof_reached) {
1448 if (res == AVERROR_INVALIDDATA)
1449 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1450 else if (res == AVERROR(EIO))
1451 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1452 else if (res == AVERROR_EOF) {
1453 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1461 if (level_check == LEVEL_ENDED && matroska->num_levels) {
1462 level = &matroska->levels[matroska->num_levels - 1];
1463 pos = avio_tell(pb);
1465 // Given that pos >= level->start no check for
1466 // level->length != EBML_UNKNOWN_LENGTH is necessary.
1467 while (matroska->num_levels && pos == level->start + level->length) {
1468 matroska->num_levels--;
1476 static void ebml_free(EbmlSyntax *syntax, void *data)
1479 for (i = 0; syntax[i].id; i++) {
1480 void *data_off = (char *) data + syntax[i].data_offset;
1481 switch (syntax[i].type) {
1487 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1491 if (syntax[i].list_elem_size) {
1492 EbmlList *list = data_off;
1493 char *ptr = list->elem;
1494 for (j = 0; j < list->nb_elem;
1495 j++, ptr += syntax[i].list_elem_size)
1496 ebml_free(syntax[i].def.n, ptr);
1497 av_freep(&list->elem);
1499 list->alloc_elem_size = 0;
1501 ebml_free(syntax[i].def.n, data_off);
1511 static int matroska_probe(const AVProbeData *p)
1514 int len_mask = 0x80, size = 1, n = 1, i;
1517 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1520 /* length of header */
1522 while (size <= 8 && !(total & len_mask)) {
1528 total &= (len_mask - 1);
1530 total = (total << 8) | p->buf[4 + n++];
1532 if (total + 1 == 1ULL << (7 * size)){
1533 /* Unknown-length header - simply parse the whole buffer. */
1534 total = p->buf_size - 4 - size;
1536 /* Does the probe data contain the whole header? */
1537 if (p->buf_size < 4 + size + total)
1541 /* The header should contain a known document type. For now,
1542 * we don't parse the whole header but simply check for the
1543 * availability of that array of characters inside the header.
1544 * Not fully fool-proof, but good enough. */
1545 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1546 size_t probelen = strlen(matroska_doctypes[i]);
1547 if (total < probelen)
1549 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1550 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1551 return AVPROBE_SCORE_MAX;
1554 // probably valid EBML header but no recognized doctype
1555 return AVPROBE_SCORE_EXTENSION;
1558 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1561 MatroskaTrack *tracks = matroska->tracks.elem;
1564 for (i = 0; i < matroska->tracks.nb_elem; i++)
1565 if (tracks[i].num == num)
1568 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
1572 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1573 MatroskaTrack *track)
1575 MatroskaTrackEncoding *encodings = track->encodings.elem;
1576 uint8_t *data = *buf;
1577 int isize = *buf_size;
1578 uint8_t *pkt_data = NULL;
1579 uint8_t av_unused *newpktdata;
1580 int pkt_size = isize;
1584 if (pkt_size >= 10000000U)
1585 return AVERROR_INVALIDDATA;
1587 switch (encodings[0].compression.algo) {
1588 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1590 int header_size = encodings[0].compression.settings.size;
1591 uint8_t *header = encodings[0].compression.settings.data;
1593 if (header_size && !header) {
1594 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1601 pkt_size = isize + header_size;
1602 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1604 return AVERROR(ENOMEM);
1606 memcpy(pkt_data, header, header_size);
1607 memcpy(pkt_data + header_size, data, isize);
1611 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1613 olen = pkt_size *= 3;
1614 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1615 + AV_INPUT_BUFFER_PADDING_SIZE);
1617 result = AVERROR(ENOMEM);
1620 pkt_data = newpktdata;
1621 result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
1622 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1624 result = AVERROR_INVALIDDATA;
1631 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1633 z_stream zstream = { 0 };
1634 if (inflateInit(&zstream) != Z_OK)
1636 zstream.next_in = data;
1637 zstream.avail_in = isize;
1640 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1642 inflateEnd(&zstream);
1643 result = AVERROR(ENOMEM);
1646 pkt_data = newpktdata;
1647 zstream.avail_out = pkt_size - zstream.total_out;
1648 zstream.next_out = pkt_data + zstream.total_out;
1649 result = inflate(&zstream, Z_NO_FLUSH);
1650 } while (result == Z_OK && pkt_size < 10000000);
1651 pkt_size = zstream.total_out;
1652 inflateEnd(&zstream);
1653 if (result != Z_STREAM_END) {
1654 if (result == Z_MEM_ERROR)
1655 result = AVERROR(ENOMEM);
1657 result = AVERROR_INVALIDDATA;
1664 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1666 bz_stream bzstream = { 0 };
1667 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1669 bzstream.next_in = data;
1670 bzstream.avail_in = isize;
1673 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1675 BZ2_bzDecompressEnd(&bzstream);
1676 result = AVERROR(ENOMEM);
1679 pkt_data = newpktdata;
1680 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1681 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1682 result = BZ2_bzDecompress(&bzstream);
1683 } while (result == BZ_OK && pkt_size < 10000000);
1684 pkt_size = bzstream.total_out_lo32;
1685 BZ2_bzDecompressEnd(&bzstream);
1686 if (result != BZ_STREAM_END) {
1687 if (result == BZ_MEM_ERROR)
1688 result = AVERROR(ENOMEM);
1690 result = AVERROR_INVALIDDATA;
1697 return AVERROR_INVALIDDATA;
1700 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1703 *buf_size = pkt_size;
1711 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1712 AVDictionary **metadata, char *prefix)
1714 MatroskaTag *tags = list->elem;
1718 for (i = 0; i < list->nb_elem; i++) {
1719 const char *lang = tags[i].lang &&
1720 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1722 if (!tags[i].name) {
1723 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1727 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1729 av_strlcpy(key, tags[i].name, sizeof(key));
1730 if (tags[i].def || !lang) {
1731 av_dict_set(metadata, key, tags[i].string, 0);
1732 if (tags[i].sub.nb_elem)
1733 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1736 av_strlcat(key, "-", sizeof(key));
1737 av_strlcat(key, lang, sizeof(key));
1738 av_dict_set(metadata, key, tags[i].string, 0);
1739 if (tags[i].sub.nb_elem)
1740 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1743 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1746 static void matroska_convert_tags(AVFormatContext *s)
1748 MatroskaDemuxContext *matroska = s->priv_data;
1749 MatroskaTags *tags = matroska->tags.elem;
1752 for (i = 0; i < matroska->tags.nb_elem; i++) {
1753 if (tags[i].target.attachuid) {
1754 MatroskaAttachment *attachment = matroska->attachments.elem;
1756 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1757 if (attachment[j].uid == tags[i].target.attachuid &&
1758 attachment[j].stream) {
1759 matroska_convert_tag(s, &tags[i].tag,
1760 &attachment[j].stream->metadata, NULL);
1765 av_log(NULL, AV_LOG_WARNING,
1766 "The tags at index %d refer to a "
1767 "non-existent attachment %"PRId64".\n",
1768 i, tags[i].target.attachuid);
1770 } else if (tags[i].target.chapteruid) {
1771 MatroskaChapter *chapter = matroska->chapters.elem;
1773 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1774 if (chapter[j].uid == tags[i].target.chapteruid &&
1775 chapter[j].chapter) {
1776 matroska_convert_tag(s, &tags[i].tag,
1777 &chapter[j].chapter->metadata, NULL);
1782 av_log(NULL, AV_LOG_WARNING,
1783 "The tags at index %d refer to a non-existent chapter "
1785 i, tags[i].target.chapteruid);
1787 } else if (tags[i].target.trackuid) {
1788 MatroskaTrack *track = matroska->tracks.elem;
1790 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1791 if (track[j].uid == tags[i].target.trackuid &&
1793 matroska_convert_tag(s, &tags[i].tag,
1794 &track[j].stream->metadata, NULL);
1799 av_log(NULL, AV_LOG_WARNING,
1800 "The tags at index %d refer to a non-existent track "
1802 i, tags[i].target.trackuid);
1805 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1806 tags[i].target.type);
1811 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1814 uint32_t saved_id = matroska->current_id;
1815 int64_t before_pos = avio_tell(matroska->ctx->pb);
1819 if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1820 /* We don't want to lose our seekhead level, so we add
1821 * a dummy. This is a crude hack. */
1822 if (matroska->num_levels == EBML_MAX_DEPTH) {
1823 av_log(matroska->ctx, AV_LOG_INFO,
1824 "Max EBML element depth (%d) reached, "
1825 "cannot parse further.\n", EBML_MAX_DEPTH);
1826 ret = AVERROR_INVALIDDATA;
1828 matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1829 matroska->num_levels++;
1830 matroska->current_id = 0;
1832 ret = ebml_parse(matroska, matroska_segment, matroska);
1833 if (ret == LEVEL_ENDED) {
1834 /* This can only happen if the seek brought us beyond EOF. */
1839 /* Seek back - notice that in all instances where this is used
1840 * it is safe to set the level to 1. */
1841 matroska_reset_status(matroska, saved_id, before_pos);
1846 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1848 EbmlList *seekhead_list = &matroska->seekhead;
1851 // we should not do any seeking in the streaming case
1852 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1855 for (i = 0; i < seekhead_list->nb_elem; i++) {
1856 MatroskaSeekhead *seekheads = seekhead_list->elem;
1857 uint32_t id = seekheads[i].id;
1858 int64_t pos = seekheads[i].pos + matroska->segment_start;
1860 MatroskaLevel1Element *elem = matroska_find_level1_elem(matroska, id);
1861 if (!elem || elem->parsed)
1866 // defer cues parsing until we actually need cue data.
1867 if (id == MATROSKA_ID_CUES)
1870 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1871 // mark index as broken
1872 matroska->cues_parsing_deferred = -1;
1880 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1882 EbmlList *index_list;
1883 MatroskaIndex *index;
1884 uint64_t index_scale = 1;
1887 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1890 index_list = &matroska->index;
1891 index = index_list->elem;
1892 if (index_list->nb_elem < 2)
1894 if (index[1].time > 1E14 / matroska->time_scale) {
1895 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1898 for (i = 0; i < index_list->nb_elem; i++) {
1899 EbmlList *pos_list = &index[i].pos;
1900 MatroskaIndexPos *pos = pos_list->elem;
1901 for (j = 0; j < pos_list->nb_elem; j++) {
1902 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1904 if (track && track->stream)
1905 av_add_index_entry(track->stream,
1906 pos[j].pos + matroska->segment_start,
1907 index[i].time / index_scale, 0, 0,
1913 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1916 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1919 for (i = 0; i < matroska->num_level1_elems; i++) {
1920 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1921 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1922 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1923 matroska->cues_parsing_deferred = -1;
1929 matroska_add_index_entries(matroska);
1932 static int matroska_aac_profile(char *codec_id)
1934 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1937 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1938 if (strstr(codec_id, aac_profiles[profile]))
1943 static int matroska_aac_sri(int samplerate)
1947 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
1948 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
1953 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
1955 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
1956 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
1959 static int matroska_parse_flac(AVFormatContext *s,
1960 MatroskaTrack *track,
1963 AVStream *st = track->stream;
1964 uint8_t *p = track->codec_priv.data;
1965 int size = track->codec_priv.size;
1967 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
1968 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
1969 track->codec_priv.size = 0;
1973 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
1975 p += track->codec_priv.size;
1976 size -= track->codec_priv.size;
1978 /* parse the remaining metadata blocks if present */
1980 int block_last, block_type, block_size;
1982 flac_parse_block_header(p, &block_last, &block_type, &block_size);
1986 if (block_size > size)
1989 /* check for the channel mask */
1990 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
1991 AVDictionary *dict = NULL;
1992 AVDictionaryEntry *chmask;
1994 ff_vorbis_comment(s, &dict, p, block_size, 0);
1995 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
1997 uint64_t mask = strtol(chmask->value, NULL, 0);
1998 if (!mask || mask & ~0x3ffffULL) {
1999 av_log(s, AV_LOG_WARNING,
2000 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2002 st->codecpar->channel_layout = mask;
2004 av_dict_free(&dict);
2014 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
2016 int major, minor, micro, bttb = 0;
2018 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2019 * this function, and fixed in 57.52 */
2020 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, µ) == 3)
2021 bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
2023 switch (field_order) {
2024 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2025 return AV_FIELD_PROGRESSIVE;
2026 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2027 return AV_FIELD_UNKNOWN;
2028 case MATROSKA_VIDEO_FIELDORDER_TT:
2030 case MATROSKA_VIDEO_FIELDORDER_BB:
2032 case MATROSKA_VIDEO_FIELDORDER_BT:
2033 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2034 case MATROSKA_VIDEO_FIELDORDER_TB:
2035 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2037 return AV_FIELD_UNKNOWN;
2041 static void mkv_stereo_mode_display_mul(int stereo_mode,
2042 int *h_width, int *h_height)
2044 switch (stereo_mode) {
2045 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2046 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2047 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2048 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2049 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2051 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2052 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2053 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2054 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2057 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2058 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2059 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2060 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2066 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2067 const MatroskaTrackVideoColor *color = track->video.color.elem;
2068 const MatroskaMasteringMeta *mastering_meta;
2069 int has_mastering_primaries, has_mastering_luminance;
2071 if (!track->video.color.nb_elem)
2074 mastering_meta = &color->mastering_meta;
2075 // Mastering primaries are CIE 1931 coords, and must be > 0.
2076 has_mastering_primaries =
2077 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2078 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2079 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2080 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2081 has_mastering_luminance = mastering_meta->max_luminance > 0;
2083 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2084 st->codecpar->color_space = color->matrix_coefficients;
2085 if (color->primaries != AVCOL_PRI_RESERVED &&
2086 color->primaries != AVCOL_PRI_RESERVED0)
2087 st->codecpar->color_primaries = color->primaries;
2088 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2089 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2090 st->codecpar->color_trc = color->transfer_characteristics;
2091 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2092 color->range <= AVCOL_RANGE_JPEG)
2093 st->codecpar->color_range = color->range;
2094 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2095 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2096 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2097 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2098 st->codecpar->chroma_location =
2099 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2100 (color->chroma_siting_vert - 1) << 7);
2102 if (color->max_cll && color->max_fall) {
2105 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2107 return AVERROR(ENOMEM);
2108 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
2109 (uint8_t *)metadata, size);
2111 av_freep(&metadata);
2114 metadata->MaxCLL = color->max_cll;
2115 metadata->MaxFALL = color->max_fall;
2118 if (has_mastering_primaries || has_mastering_luminance) {
2119 // Use similar rationals as other standards.
2120 const int chroma_den = 50000;
2121 const int luma_den = 10000;
2122 AVMasteringDisplayMetadata *metadata =
2123 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
2124 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
2125 sizeof(AVMasteringDisplayMetadata));
2127 return AVERROR(ENOMEM);
2129 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2130 if (has_mastering_primaries) {
2131 metadata->display_primaries[0][0] = av_make_q(
2132 round(mastering_meta->r_x * chroma_den), chroma_den);
2133 metadata->display_primaries[0][1] = av_make_q(
2134 round(mastering_meta->r_y * chroma_den), chroma_den);
2135 metadata->display_primaries[1][0] = av_make_q(
2136 round(mastering_meta->g_x * chroma_den), chroma_den);
2137 metadata->display_primaries[1][1] = av_make_q(
2138 round(mastering_meta->g_y * chroma_den), chroma_den);
2139 metadata->display_primaries[2][0] = av_make_q(
2140 round(mastering_meta->b_x * chroma_den), chroma_den);
2141 metadata->display_primaries[2][1] = av_make_q(
2142 round(mastering_meta->b_y * chroma_den), chroma_den);
2143 metadata->white_point[0] = av_make_q(
2144 round(mastering_meta->white_x * chroma_den), chroma_den);
2145 metadata->white_point[1] = av_make_q(
2146 round(mastering_meta->white_y * chroma_den), chroma_den);
2147 metadata->has_primaries = 1;
2149 if (has_mastering_luminance) {
2150 metadata->max_luminance = av_make_q(
2151 round(mastering_meta->max_luminance * luma_den), luma_den);
2152 metadata->min_luminance = av_make_q(
2153 round(mastering_meta->min_luminance * luma_den), luma_den);
2154 metadata->has_luminance = 1;
2160 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track) {
2161 AVSphericalMapping *spherical;
2162 enum AVSphericalProjection projection;
2163 size_t spherical_size;
2164 uint32_t l = 0, t = 0, r = 0, b = 0;
2165 uint32_t padding = 0;
2169 bytestream2_init(&gb, track->video.projection.private.data,
2170 track->video.projection.private.size);
2172 if (bytestream2_get_byte(&gb) != 0) {
2173 av_log(NULL, AV_LOG_WARNING, "Unknown spherical metadata\n");
2177 bytestream2_skip(&gb, 3); // flags
2179 switch (track->video.projection.type) {
2180 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2181 if (track->video.projection.private.size == 20) {
2182 t = bytestream2_get_be32(&gb);
2183 b = bytestream2_get_be32(&gb);
2184 l = bytestream2_get_be32(&gb);
2185 r = bytestream2_get_be32(&gb);
2187 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2188 av_log(NULL, AV_LOG_ERROR,
2189 "Invalid bounding rectangle coordinates "
2190 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2192 return AVERROR_INVALIDDATA;
2194 } else if (track->video.projection.private.size != 0) {
2195 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2196 return AVERROR_INVALIDDATA;
2199 if (l || t || r || b)
2200 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2202 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2204 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2205 if (track->video.projection.private.size < 4) {
2206 av_log(NULL, AV_LOG_ERROR, "Missing projection private properties\n");
2207 return AVERROR_INVALIDDATA;
2208 } else if (track->video.projection.private.size == 12) {
2209 uint32_t layout = bytestream2_get_be32(&gb);
2211 av_log(NULL, AV_LOG_WARNING,
2212 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2215 projection = AV_SPHERICAL_CUBEMAP;
2216 padding = bytestream2_get_be32(&gb);
2218 av_log(NULL, AV_LOG_ERROR, "Unknown spherical metadata\n");
2219 return AVERROR_INVALIDDATA;
2222 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2223 /* No Spherical metadata */
2226 av_log(NULL, AV_LOG_WARNING,
2227 "Unknown spherical metadata type %"PRIu64"\n",
2228 track->video.projection.type);
2232 spherical = av_spherical_alloc(&spherical_size);
2234 return AVERROR(ENOMEM);
2236 spherical->projection = projection;
2238 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2239 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2240 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2242 spherical->padding = padding;
2244 spherical->bound_left = l;
2245 spherical->bound_top = t;
2246 spherical->bound_right = r;
2247 spherical->bound_bottom = b;
2249 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2252 av_freep(&spherical);
2259 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2261 const AVCodecTag *codec_tags;
2263 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2264 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2266 /* Normalize noncompliant private data that starts with the fourcc
2267 * by expanding/shifting the data by 4 bytes and storing the data
2268 * size at the start. */
2269 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2270 int ret = av_buffer_realloc(&track->codec_priv.buf,
2271 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2275 track->codec_priv.data = track->codec_priv.buf->data;
2276 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2277 track->codec_priv.size += 4;
2278 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2281 *fourcc = AV_RL32(track->codec_priv.data + 4);
2282 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2287 static int matroska_parse_tracks(AVFormatContext *s)
2289 MatroskaDemuxContext *matroska = s->priv_data;
2290 MatroskaTrack *tracks = matroska->tracks.elem;
2295 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2296 MatroskaTrack *track = &tracks[i];
2297 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2298 EbmlList *encodings_list = &track->encodings;
2299 MatroskaTrackEncoding *encodings = encodings_list->elem;
2300 uint8_t *extradata = NULL;
2301 int extradata_size = 0;
2302 int extradata_offset = 0;
2303 uint32_t fourcc = 0;
2305 char* key_id_base64 = NULL;
2308 /* Apply some sanity checks. */
2309 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2310 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2311 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2312 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2313 av_log(matroska->ctx, AV_LOG_INFO,
2314 "Unknown or unsupported track type %"PRIu64"\n",
2318 if (!track->codec_id)
2321 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2322 isnan(track->audio.samplerate)) {
2323 av_log(matroska->ctx, AV_LOG_WARNING,
2324 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2325 track->audio.samplerate);
2326 track->audio.samplerate = 8000;
2329 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2330 if (!track->default_duration && track->video.frame_rate > 0) {
2331 double default_duration = 1000000000 / track->video.frame_rate;
2332 if (default_duration > UINT64_MAX || default_duration < 0) {
2333 av_log(matroska->ctx, AV_LOG_WARNING,
2334 "Invalid frame rate %e. Cannot calculate default duration.\n",
2335 track->video.frame_rate);
2337 track->default_duration = default_duration;
2340 if (track->video.display_width == -1)
2341 track->video.display_width = track->video.pixel_width;
2342 if (track->video.display_height == -1)
2343 track->video.display_height = track->video.pixel_height;
2344 if (track->video.color_space.size == 4)
2345 fourcc = AV_RL32(track->video.color_space.data);
2346 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2347 if (!track->audio.out_samplerate)
2348 track->audio.out_samplerate = track->audio.samplerate;
2350 if (encodings_list->nb_elem > 1) {
2351 av_log(matroska->ctx, AV_LOG_ERROR,
2352 "Multiple combined encodings not supported");
2353 } else if (encodings_list->nb_elem == 1) {
2354 if (encodings[0].type) {
2355 if (encodings[0].encryption.key_id.size > 0) {
2356 /* Save the encryption key id to be stored later as a
2358 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2359 key_id_base64 = av_malloc(b64_size);
2360 if (key_id_base64 == NULL)
2361 return AVERROR(ENOMEM);
2363 av_base64_encode(key_id_base64, b64_size,
2364 encodings[0].encryption.key_id.data,
2365 encodings[0].encryption.key_id.size);
2367 encodings[0].scope = 0;
2368 av_log(matroska->ctx, AV_LOG_ERROR,
2369 "Unsupported encoding type");
2373 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2376 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2379 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2381 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2382 encodings[0].scope = 0;
2383 av_log(matroska->ctx, AV_LOG_ERROR,
2384 "Unsupported encoding type");
2385 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2386 uint8_t *codec_priv = track->codec_priv.data;
2387 int ret = matroska_decode_buffer(&track->codec_priv.data,
2388 &track->codec_priv.size,
2391 track->codec_priv.data = NULL;
2392 track->codec_priv.size = 0;
2393 av_log(matroska->ctx, AV_LOG_ERROR,
2394 "Failed to decode codec private data\n");
2397 if (codec_priv != track->codec_priv.data) {
2398 av_buffer_unref(&track->codec_priv.buf);
2399 if (track->codec_priv.data) {
2400 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2401 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2403 if (!track->codec_priv.buf) {
2404 av_freep(&track->codec_priv.data);
2405 track->codec_priv.size = 0;
2406 return AVERROR(ENOMEM);
2413 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2414 if (!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2415 strlen(ff_mkv_codec_tags[j].str))) {
2416 codec_id = ff_mkv_codec_tags[j].id;
2421 st = track->stream = avformat_new_stream(s, NULL);
2423 av_free(key_id_base64);
2424 return AVERROR(ENOMEM);
2427 if (key_id_base64) {
2428 /* export encryption key id as base64 metadata tag */
2429 av_dict_set(&st->metadata, "enc_key_id", key_id_base64, 0);
2430 av_freep(&key_id_base64);
2433 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2434 track->codec_priv.size >= 40 &&
2435 track->codec_priv.data) {
2436 track->ms_compat = 1;
2437 bit_depth = AV_RL16(track->codec_priv.data + 14);
2438 fourcc = AV_RL32(track->codec_priv.data + 16);
2439 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2442 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2444 extradata_offset = 40;
2445 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2446 track->codec_priv.size >= 14 &&
2447 track->codec_priv.data) {
2449 ffio_init_context(&b, track->codec_priv.data,
2450 track->codec_priv.size,
2451 0, NULL, NULL, NULL, NULL);
2452 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2455 codec_id = st->codecpar->codec_id;
2456 fourcc = st->codecpar->codec_tag;
2457 extradata_offset = FFMIN(track->codec_priv.size, 18);
2458 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2459 /* Normally 36, but allow noncompliant private data */
2460 && (track->codec_priv.size >= 32)
2461 && (track->codec_priv.data)) {
2462 uint16_t sample_size;
2463 int ret = get_qt_codec(track, &fourcc, &codec_id);
2466 sample_size = AV_RB16(track->codec_priv.data + 26);
2468 if (sample_size == 8) {
2469 fourcc = MKTAG('r','a','w',' ');
2470 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2471 } else if (sample_size == 16) {
2472 fourcc = MKTAG('t','w','o','s');
2473 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2476 if ((fourcc == MKTAG('t','w','o','s') ||
2477 fourcc == MKTAG('s','o','w','t')) &&
2479 codec_id = AV_CODEC_ID_PCM_S8;
2480 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2481 (track->codec_priv.size >= 21) &&
2482 (track->codec_priv.data)) {
2483 int ret = get_qt_codec(track, &fourcc, &codec_id);
2486 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2487 fourcc = MKTAG('S','V','Q','3');
2488 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2490 if (codec_id == AV_CODEC_ID_NONE)
2491 av_log(matroska->ctx, AV_LOG_ERROR,
2492 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2493 if (track->codec_priv.size >= 86) {
2494 bit_depth = AV_RB16(track->codec_priv.data + 82);
2495 ffio_init_context(&b, track->codec_priv.data,
2496 track->codec_priv.size,
2497 0, NULL, NULL, NULL, NULL);
2498 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2500 track->has_palette = 1;
2503 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2504 switch (track->audio.bitdepth) {
2506 codec_id = AV_CODEC_ID_PCM_U8;
2509 codec_id = AV_CODEC_ID_PCM_S24BE;
2512 codec_id = AV_CODEC_ID_PCM_S32BE;
2515 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2516 switch (track->audio.bitdepth) {
2518 codec_id = AV_CODEC_ID_PCM_U8;
2521 codec_id = AV_CODEC_ID_PCM_S24LE;
2524 codec_id = AV_CODEC_ID_PCM_S32LE;
2527 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2528 track->audio.bitdepth == 64) {
2529 codec_id = AV_CODEC_ID_PCM_F64LE;
2530 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2531 int profile = matroska_aac_profile(track->codec_id);
2532 int sri = matroska_aac_sri(track->audio.samplerate);
2533 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2535 return AVERROR(ENOMEM);
2536 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2537 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2538 if (strstr(track->codec_id, "SBR")) {
2539 sri = matroska_aac_sri(track->audio.out_samplerate);
2540 extradata[2] = 0x56;
2541 extradata[3] = 0xE5;
2542 extradata[4] = 0x80 | (sri << 3);
2546 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2547 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2548 * Create the "atom size", "tag", and "tag version" fields the
2549 * decoder expects manually. */
2550 extradata_size = 12 + track->codec_priv.size;
2551 extradata = av_mallocz(extradata_size +
2552 AV_INPUT_BUFFER_PADDING_SIZE);
2554 return AVERROR(ENOMEM);
2555 AV_WB32(extradata, extradata_size);
2556 memcpy(&extradata[4], "alac", 4);
2557 AV_WB32(&extradata[8], 0);
2558 memcpy(&extradata[12], track->codec_priv.data,
2559 track->codec_priv.size);
2560 } else if (codec_id == AV_CODEC_ID_TTA) {
2561 extradata_size = 30;
2562 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2564 return AVERROR(ENOMEM);
2565 ffio_init_context(&b, extradata, extradata_size, 1,
2566 NULL, NULL, NULL, NULL);
2567 avio_write(&b, "TTA1", 4);
2569 if (track->audio.channels > UINT16_MAX ||
2570 track->audio.bitdepth > UINT16_MAX) {
2571 av_log(matroska->ctx, AV_LOG_WARNING,
2572 "Too large audio channel number %"PRIu64
2573 " or bitdepth %"PRIu64". Skipping track.\n",
2574 track->audio.channels, track->audio.bitdepth);
2575 av_freep(&extradata);
2576 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2577 return AVERROR_INVALIDDATA;
2581 avio_wl16(&b, track->audio.channels);
2582 avio_wl16(&b, track->audio.bitdepth);
2583 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2584 return AVERROR_INVALIDDATA;
2585 avio_wl32(&b, track->audio.out_samplerate);
2586 avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale),
2587 track->audio.out_samplerate,
2588 AV_TIME_BASE * 1000));
2589 } else if (codec_id == AV_CODEC_ID_RV10 ||
2590 codec_id == AV_CODEC_ID_RV20 ||
2591 codec_id == AV_CODEC_ID_RV30 ||
2592 codec_id == AV_CODEC_ID_RV40) {
2593 extradata_offset = 26;
2594 } else if (codec_id == AV_CODEC_ID_RA_144) {
2595 track->audio.out_samplerate = 8000;
2596 track->audio.channels = 1;
2597 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2598 codec_id == AV_CODEC_ID_COOK ||
2599 codec_id == AV_CODEC_ID_ATRAC3 ||
2600 codec_id == AV_CODEC_ID_SIPR)
2601 && track->codec_priv.data) {
2604 ffio_init_context(&b, track->codec_priv.data,
2605 track->codec_priv.size,
2606 0, NULL, NULL, NULL, NULL);
2608 flavor = avio_rb16(&b);
2609 track->audio.coded_framesize = avio_rb32(&b);
2611 track->audio.sub_packet_h = avio_rb16(&b);
2612 track->audio.frame_size = avio_rb16(&b);
2613 track->audio.sub_packet_size = avio_rb16(&b);
2615 track->audio.coded_framesize <= 0 ||
2616 track->audio.sub_packet_h <= 0 ||
2617 track->audio.frame_size <= 0 ||
2618 track->audio.sub_packet_size <= 0 && codec_id != AV_CODEC_ID_SIPR)
2619 return AVERROR_INVALIDDATA;
2620 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2621 track->audio.frame_size);
2622 if (!track->audio.buf)
2623 return AVERROR(ENOMEM);
2624 if (codec_id == AV_CODEC_ID_RA_288) {
2625 st->codecpar->block_align = track->audio.coded_framesize;
2626 track->codec_priv.size = 0;
2628 if (codec_id == AV_CODEC_ID_SIPR && flavor < 4) {
2629 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2630 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2631 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2633 st->codecpar->block_align = track->audio.sub_packet_size;
2634 extradata_offset = 78;
2636 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2637 ret = matroska_parse_flac(s, track, &extradata_offset);
2640 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2641 fourcc = AV_RL32(track->codec_priv.data);
2642 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2643 /* we don't need any value stored in CodecPrivate.
2644 make sure that it's not exported as extradata. */
2645 track->codec_priv.size = 0;
2646 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2647 /* For now, propagate only the OBUs, if any. Once libavcodec is
2648 updated to handle isobmff style extradata this can be removed. */
2649 extradata_offset = 4;
2651 track->codec_priv.size -= extradata_offset;
2653 if (codec_id == AV_CODEC_ID_NONE)
2654 av_log(matroska->ctx, AV_LOG_INFO,
2655 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2657 if (track->time_scale < 0.01)
2658 track->time_scale = 1.0;
2659 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2660 1000 * 1000 * 1000); /* 64 bit pts in ns */
2662 /* convert the delay from ns to the track timebase */
2663 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2664 (AVRational){ 1, 1000000000 },
2667 st->codecpar->codec_id = codec_id;
2669 if (strcmp(track->language, "und"))
2670 av_dict_set(&st->metadata, "language", track->language, 0);
2671 av_dict_set(&st->metadata, "title", track->name, 0);
2673 if (track->flag_default)
2674 st->disposition |= AV_DISPOSITION_DEFAULT;
2675 if (track->flag_forced)
2676 st->disposition |= AV_DISPOSITION_FORCED;
2678 if (!st->codecpar->extradata) {
2680 st->codecpar->extradata = extradata;
2681 st->codecpar->extradata_size = extradata_size;
2682 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2683 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2684 return AVERROR(ENOMEM);
2685 memcpy(st->codecpar->extradata,
2686 track->codec_priv.data + extradata_offset,
2687 track->codec_priv.size);
2691 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2692 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2693 int display_width_mul = 1;
2694 int display_height_mul = 1;
2696 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2697 st->codecpar->codec_tag = fourcc;
2699 st->codecpar->bits_per_coded_sample = bit_depth;
2700 st->codecpar->width = track->video.pixel_width;
2701 st->codecpar->height = track->video.pixel_height;
2703 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2704 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2705 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2706 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2708 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2709 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2711 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2712 av_reduce(&st->sample_aspect_ratio.num,
2713 &st->sample_aspect_ratio.den,
2714 st->codecpar->height * track->video.display_width * display_width_mul,
2715 st->codecpar->width * track->video.display_height * display_height_mul,
2718 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2719 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2721 if (track->default_duration) {
2722 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2723 1000000000, track->default_duration, 30000);
2724 #if FF_API_R_FRAME_RATE
2725 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2726 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2727 st->r_frame_rate = st->avg_frame_rate;
2731 /* export stereo mode flag as metadata tag */
2732 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2733 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2735 /* export alpha mode flag as metadata tag */
2736 if (track->video.alpha_mode)
2737 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2739 /* if we have virtual track, mark the real tracks */
2740 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2742 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2744 snprintf(buf, sizeof(buf), "%s_%d",
2745 ff_matroska_video_stereo_plane[planes[j].type], i);
2746 for (k=0; k < matroska->tracks.nb_elem; k++)
2747 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2748 av_dict_set(&tracks[k].stream->metadata,
2749 "stereo_mode", buf, 0);
2753 // add stream level stereo3d side data if it is a supported format
2754 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2755 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2756 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2761 ret = mkv_parse_video_color(st, track);
2764 ret = mkv_parse_video_projection(st, track);
2767 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2768 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2769 st->codecpar->codec_tag = fourcc;
2770 st->codecpar->sample_rate = track->audio.out_samplerate;
2771 st->codecpar->channels = track->audio.channels;
2772 if (!st->codecpar->bits_per_coded_sample)
2773 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2774 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2775 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2776 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2777 st->need_parsing = AVSTREAM_PARSE_FULL;
2778 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2779 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2780 if (track->codec_delay > 0) {
2781 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2782 (AVRational){1, 1000000000},
2783 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2784 48000 : st->codecpar->sample_rate});
2786 if (track->seek_preroll > 0) {
2787 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2788 (AVRational){1, 1000000000},
2789 (AVRational){1, st->codecpar->sample_rate});
2791 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2792 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2794 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2795 st->disposition |= AV_DISPOSITION_CAPTIONS;
2796 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2797 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2798 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2799 st->disposition |= AV_DISPOSITION_METADATA;
2801 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2802 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2809 static int matroska_read_header(AVFormatContext *s)
2811 MatroskaDemuxContext *matroska = s->priv_data;
2812 EbmlList *attachments_list = &matroska->attachments;
2813 EbmlList *chapters_list = &matroska->chapters;
2814 MatroskaAttachment *attachments;
2815 MatroskaChapter *chapters;
2816 uint64_t max_start = 0;
2822 matroska->cues_parsing_deferred = 1;
2824 /* First read the EBML header. */
2825 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2826 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2827 ebml_free(ebml_syntax, &ebml);
2828 return AVERROR_INVALIDDATA;
2830 if (ebml.version > EBML_VERSION ||
2831 ebml.max_size > sizeof(uint64_t) ||
2832 ebml.id_length > sizeof(uint32_t) ||
2833 ebml.doctype_version > 3) {
2834 avpriv_report_missing_feature(matroska->ctx,
2835 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2836 ebml.version, ebml.doctype, ebml.doctype_version);
2837 ebml_free(ebml_syntax, &ebml);
2838 return AVERROR_PATCHWELCOME;
2839 } else if (ebml.doctype_version == 3) {
2840 av_log(matroska->ctx, AV_LOG_WARNING,
2841 "EBML header using unsupported features\n"
2842 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2843 ebml.version, ebml.doctype, ebml.doctype_version);
2845 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2846 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2848 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2849 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2850 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2851 ebml_free(ebml_syntax, &ebml);
2852 return AVERROR_INVALIDDATA;
2855 ebml_free(ebml_syntax, &ebml);
2857 /* The next thing is a segment. */
2858 pos = avio_tell(matroska->ctx->pb);
2859 res = ebml_parse(matroska, matroska_segments, matroska);
2860 // Try resyncing until we find an EBML_STOP type element.
2862 res = matroska_resync(matroska, pos);
2865 pos = avio_tell(matroska->ctx->pb);
2866 res = ebml_parse(matroska, matroska_segment, matroska);
2868 /* Set data_offset as it might be needed later by seek_frame_generic. */
2869 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2870 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2871 matroska_execute_seekhead(matroska);
2873 if (!matroska->time_scale)
2874 matroska->time_scale = 1000000;
2875 if (matroska->duration)
2876 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2877 1000 / AV_TIME_BASE;
2878 av_dict_set(&s->metadata, "title", matroska->title, 0);
2879 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2881 if (matroska->date_utc.size == 8)
2882 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2884 res = matroska_parse_tracks(s);
2888 attachments = attachments_list->elem;
2889 for (j = 0; j < attachments_list->nb_elem; j++) {
2890 if (!(attachments[j].filename && attachments[j].mime &&
2891 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2892 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2894 AVStream *st = avformat_new_stream(s, NULL);
2897 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2898 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2899 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2901 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2902 if (!strncmp(ff_mkv_image_mime_tags[i].str, attachments[j].mime,
2903 strlen(ff_mkv_image_mime_tags[i].str))) {
2904 st->codecpar->codec_id = ff_mkv_image_mime_tags[i].id;
2909 attachments[j].stream = st;
2911 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
2912 AVPacket *pkt = &st->attached_pic;
2914 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
2915 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2917 av_init_packet(pkt);
2918 pkt->buf = av_buffer_ref(attachments[j].bin.buf);
2920 return AVERROR(ENOMEM);
2921 pkt->data = attachments[j].bin.data;
2922 pkt->size = attachments[j].bin.size;
2923 pkt->stream_index = st->index;
2924 pkt->flags |= AV_PKT_FLAG_KEY;
2926 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
2927 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
2929 memcpy(st->codecpar->extradata, attachments[j].bin.data,
2930 attachments[j].bin.size);
2932 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2933 if (!strncmp(ff_mkv_mime_tags[i].str, attachments[j].mime,
2934 strlen(ff_mkv_mime_tags[i].str))) {
2935 st->codecpar->codec_id = ff_mkv_mime_tags[i].id;
2943 chapters = chapters_list->elem;
2944 for (i = 0; i < chapters_list->nb_elem; i++)
2945 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
2946 (max_start == 0 || chapters[i].start > max_start)) {
2947 chapters[i].chapter =
2948 avpriv_new_chapter(s, chapters[i].uid,
2949 (AVRational) { 1, 1000000000 },
2950 chapters[i].start, chapters[i].end,
2952 if (chapters[i].chapter) {
2953 av_dict_set(&chapters[i].chapter->metadata,
2954 "title", chapters[i].title, 0);
2956 max_start = chapters[i].start;
2959 matroska_add_index_entries(matroska);
2961 matroska_convert_tags(s);
2965 matroska_read_close(s);
2970 * Put one packet in an application-supplied AVPacket struct.
2971 * Returns 0 on success or -1 on failure.
2973 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
2976 if (matroska->queue) {
2977 MatroskaTrack *tracks = matroska->tracks.elem;
2978 MatroskaTrack *track;
2980 ff_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
2981 track = &tracks[pkt->stream_index];
2982 if (track->has_palette) {
2983 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2985 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
2987 memcpy(pal, track->palette, AVPALETTE_SIZE);
2989 track->has_palette = 0;
2998 * Free all packets in our internal queue.
3000 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3002 ff_packet_list_free(&matroska->queue, &matroska->queue_end);
3005 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3006 int *buf_size, int type,
3007 uint32_t **lace_buf, int *laces)
3009 int res = 0, n, size = *buf_size;
3010 uint8_t *data = *buf;
3011 uint32_t *lace_size;
3015 *lace_buf = av_malloc(sizeof(**lace_buf));
3017 return AVERROR(ENOMEM);
3019 *lace_buf[0] = size;
3023 av_assert0(size > 0);
3027 lace_size = av_malloc_array(*laces, sizeof(*lace_size));
3029 return AVERROR(ENOMEM);
3032 case 0x1: /* Xiph lacing */
3036 for (n = 0; res == 0 && n < *laces - 1; n++) {
3040 if (size <= total) {
3041 res = AVERROR_INVALIDDATA;
3046 lace_size[n] += temp;
3053 if (size <= total) {
3054 res = AVERROR_INVALIDDATA;
3058 lace_size[n] = size - total;
3062 case 0x2: /* fixed-size lacing */
3063 if (size % (*laces)) {
3064 res = AVERROR_INVALIDDATA;
3067 for (n = 0; n < *laces; n++)
3068 lace_size[n] = size / *laces;
3071 case 0x3: /* EBML lacing */
3075 n = matroska_ebmlnum_uint(matroska, data, size, &num);
3076 if (n < 0 || num > INT_MAX) {
3077 av_log(matroska->ctx, AV_LOG_INFO,
3078 "EBML block data error\n");
3079 res = n<0 ? n : AVERROR_INVALIDDATA;
3084 total = lace_size[0] = num;
3085 for (n = 1; res == 0 && n < *laces - 1; n++) {
3088 r = matroska_ebmlnum_sint(matroska, data, size, &snum);
3089 if (r < 0 || lace_size[n - 1] + snum > (uint64_t)INT_MAX) {
3090 av_log(matroska->ctx, AV_LOG_INFO,
3091 "EBML block data error\n");
3092 res = r<0 ? r : AVERROR_INVALIDDATA;
3097 lace_size[n] = lace_size[n - 1] + snum;
3098 total += lace_size[n];
3100 if (size <= total) {
3101 res = AVERROR_INVALIDDATA;
3104 lace_size[*laces - 1] = size - total;
3110 *lace_buf = lace_size;
3116 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3117 MatroskaTrack *track, AVStream *st,
3118 uint8_t *data, int size, uint64_t timecode,
3121 int a = st->codecpar->block_align;
3122 int sps = track->audio.sub_packet_size;
3123 int cfs = track->audio.coded_framesize;
3124 int h = track->audio.sub_packet_h;
3125 int y = track->audio.sub_packet_cnt;
3126 int w = track->audio.frame_size;
3129 if (!track->audio.pkt_cnt) {
3130 if (track->audio.sub_packet_cnt == 0)
3131 track->audio.buf_timecode = timecode;
3132 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3133 if (size < cfs * h / 2) {
3134 av_log(matroska->ctx, AV_LOG_ERROR,
3135 "Corrupt int4 RM-style audio packet size\n");
3136 return AVERROR_INVALIDDATA;
3138 for (x = 0; x < h / 2; x++)
3139 memcpy(track->audio.buf + x * 2 * w + y * cfs,
3140 data + x * cfs, cfs);
3141 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3143 av_log(matroska->ctx, AV_LOG_ERROR,
3144 "Corrupt sipr RM-style audio packet size\n");
3145 return AVERROR_INVALIDDATA;
3147 memcpy(track->audio.buf + y * w, data, w);
3149 if (size < sps * w / sps || h<=0 || w%sps) {
3150 av_log(matroska->ctx, AV_LOG_ERROR,
3151 "Corrupt generic RM-style audio packet size\n");
3152 return AVERROR_INVALIDDATA;
3154 for (x = 0; x < w / sps; x++)
3155 memcpy(track->audio.buf +
3156 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3157 data + x * sps, sps);
3160 if (++track->audio.sub_packet_cnt >= h) {
3161 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3162 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3163 track->audio.sub_packet_cnt = 0;
3164 track->audio.pkt_cnt = h * w / a;
3168 while (track->audio.pkt_cnt) {
3170 AVPacket pktl, *pkt = &pktl;
3172 ret = av_new_packet(pkt, a);
3177 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3179 pkt->pts = track->audio.buf_timecode;
3180 track->audio.buf_timecode = AV_NOPTS_VALUE;
3182 pkt->stream_index = st->index;
3183 ret = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3185 av_packet_unref(pkt);
3186 return AVERROR(ENOMEM);
3193 /* reconstruct full wavpack blocks from mangled matroska ones */
3194 static int matroska_parse_wavpack(MatroskaTrack *track, uint8_t *src,
3195 uint8_t **pdst, int *size)
3197 uint8_t *dst = NULL;
3202 int ret, offset = 0;
3204 if (srclen < 12 || track->stream->codecpar->extradata_size < 2)
3205 return AVERROR_INVALIDDATA;
3207 ver = AV_RL16(track->stream->codecpar->extradata);
3209 samples = AV_RL32(src);
3213 while (srclen >= 8) {
3218 uint32_t flags = AV_RL32(src);
3219 uint32_t crc = AV_RL32(src + 4);
3223 multiblock = (flags & 0x1800) != 0x1800;
3226 ret = AVERROR_INVALIDDATA;
3229 blocksize = AV_RL32(src);
3235 if (blocksize > srclen) {
3236 ret = AVERROR_INVALIDDATA;
3240 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3242 ret = AVERROR(ENOMEM);
3246 dstlen += blocksize + 32;
3248 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3249 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3250 AV_WL16(dst + offset + 8, ver); // version
3251 AV_WL16(dst + offset + 10, 0); // track/index_no
3252 AV_WL32(dst + offset + 12, 0); // total samples
3253 AV_WL32(dst + offset + 16, 0); // block index
3254 AV_WL32(dst + offset + 20, samples); // number of samples
3255 AV_WL32(dst + offset + 24, flags); // flags
3256 AV_WL32(dst + offset + 28, crc); // crc
3257 memcpy(dst + offset + 32, src, blocksize); // block data
3260 srclen -= blocksize;
3261 offset += blocksize + 32;
3264 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3276 static int matroska_parse_prores(MatroskaTrack *track, uint8_t *src,
3277 uint8_t **pdst, int *size)
3282 if (AV_RB32(&src[4]) != MKBETAG('i', 'c', 'p', 'f')) {
3283 dst = av_malloc(dstlen + 8 + AV_INPUT_BUFFER_PADDING_SIZE);
3285 return AVERROR(ENOMEM);
3287 AV_WB32(dst, dstlen);
3288 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3289 memcpy(dst + 8, src, dstlen);
3290 memset(dst + 8 + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3300 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3301 MatroskaTrack *track,
3303 uint8_t *data, int data_len,
3308 AVPacket pktl, *pkt = &pktl;
3309 uint8_t *id, *settings, *text, *buf;
3310 int id_len, settings_len, text_len;
3315 return AVERROR_INVALIDDATA;
3318 q = data + data_len;
3323 if (*p == '\r' || *p == '\n') {
3332 if (p >= q || *p != '\n')
3333 return AVERROR_INVALIDDATA;
3339 if (*p == '\r' || *p == '\n') {
3340 settings_len = p - settings;
3348 if (p >= q || *p != '\n')
3349 return AVERROR_INVALIDDATA;
3354 while (text_len > 0) {
3355 const int len = text_len - 1;
3356 const uint8_t c = p[len];
3357 if (c != '\r' && c != '\n')
3363 return AVERROR_INVALIDDATA;
3365 err = av_new_packet(pkt, text_len);
3370 memcpy(pkt->data, text, text_len);
3373 buf = av_packet_new_side_data(pkt,
3374 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3377 av_packet_unref(pkt);
3378 return AVERROR(ENOMEM);
3380 memcpy(buf, id, id_len);
3383 if (settings_len > 0) {
3384 buf = av_packet_new_side_data(pkt,
3385 AV_PKT_DATA_WEBVTT_SETTINGS,
3388 av_packet_unref(pkt);
3389 return AVERROR(ENOMEM);
3391 memcpy(buf, settings, settings_len);
3394 // Do we need this for subtitles?
3395 // pkt->flags = AV_PKT_FLAG_KEY;
3397 pkt->stream_index = st->index;
3398 pkt->pts = timecode;
3400 // Do we need this for subtitles?
3401 // pkt->dts = timecode;
3403 pkt->duration = duration;
3406 err = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3408 av_packet_unref(pkt);
3409 return AVERROR(ENOMEM);
3415 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3416 MatroskaTrack *track, AVStream *st,
3417 AVBufferRef *buf, uint8_t *data, int pkt_size,
3418 uint64_t timecode, uint64_t lace_duration,
3419 int64_t pos, int is_keyframe,
3420 uint8_t *additional, uint64_t additional_id, int additional_size,
3421 int64_t discard_padding)
3423 MatroskaTrackEncoding *encodings = track->encodings.elem;
3424 uint8_t *pkt_data = data;
3426 AVPacket pktl, *pkt = &pktl;
3428 if (encodings && !encodings->type && encodings->scope & 1) {
3429 res = matroska_decode_buffer(&pkt_data, &pkt_size, track);
3434 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3436 res = matroska_parse_wavpack(track, pkt_data, &wv_data, &pkt_size);
3438 av_log(matroska->ctx, AV_LOG_ERROR,
3439 "Error parsing a wavpack block.\n");
3442 if (pkt_data != data)
3443 av_freep(&pkt_data);
3447 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
3449 res = matroska_parse_prores(track, pkt_data, &pr_data, &pkt_size);
3451 av_log(matroska->ctx, AV_LOG_ERROR,
3452 "Error parsing a prores block.\n");
3455 if (pkt_data != data)
3456 av_freep(&pkt_data);
3460 av_init_packet(pkt);
3461 if (pkt_data != data)
3462 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3465 pkt->buf = av_buffer_ref(buf);
3468 res = AVERROR(ENOMEM);
3472 pkt->data = pkt_data;
3473 pkt->size = pkt_size;
3474 pkt->flags = is_keyframe;
3475 pkt->stream_index = st->index;
3477 if (additional_size > 0) {
3478 uint8_t *side_data = av_packet_new_side_data(pkt,
3479 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3480 additional_size + 8);
3482 av_packet_unref(pkt);
3483 return AVERROR(ENOMEM);
3485 AV_WB64(side_data, additional_id);
3486 memcpy(side_data + 8, additional, additional_size);
3489 if (discard_padding) {
3490 uint8_t *side_data = av_packet_new_side_data(pkt,
3491 AV_PKT_DATA_SKIP_SAMPLES,
3494 av_packet_unref(pkt);
3495 return AVERROR(ENOMEM);
3497 discard_padding = av_rescale_q(discard_padding,
3498 (AVRational){1, 1000000000},
3499 (AVRational){1, st->codecpar->sample_rate});
3500 if (discard_padding > 0) {
3501 AV_WL32(side_data + 4, discard_padding);
3503 AV_WL32(side_data, -discard_padding);
3507 if (track->ms_compat)
3508 pkt->dts = timecode;
3510 pkt->pts = timecode;
3512 pkt->duration = lace_duration;
3514 #if FF_API_CONVERGENCE_DURATION
3515 FF_DISABLE_DEPRECATION_WARNINGS
3516 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3517 pkt->convergence_duration = lace_duration;
3519 FF_ENABLE_DEPRECATION_WARNINGS
3522 res = ff_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, 0);
3524 av_packet_unref(pkt);
3525 return AVERROR(ENOMEM);
3531 if (pkt_data != data)
3532 av_freep(&pkt_data);
3536 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3537 int size, int64_t pos, uint64_t cluster_time,
3538 uint64_t block_duration, int is_keyframe,
3539 uint8_t *additional, uint64_t additional_id, int additional_size,
3540 int64_t cluster_pos, int64_t discard_padding)
3542 uint64_t timecode = AV_NOPTS_VALUE;
3543 MatroskaTrack *track;
3547 uint32_t *lace_size = NULL;
3548 int n, flags, laces = 0;
3550 int trust_default_duration = 1;
3552 if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
3558 track = matroska_find_track_by_num(matroska, num);
3559 if (!track || !track->stream) {
3560 av_log(matroska->ctx, AV_LOG_INFO,
3561 "Invalid stream %"PRIu64"\n", num);
3562 return AVERROR_INVALIDDATA;
3563 } else if (size <= 3)
3566 if (st->discard >= AVDISCARD_ALL)
3568 av_assert1(block_duration != AV_NOPTS_VALUE);
3570 block_time = sign_extend(AV_RB16(data), 16);
3574 if (is_keyframe == -1)
3575 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3577 if (cluster_time != (uint64_t) -1 &&
3578 (block_time >= 0 || cluster_time >= -block_time)) {
3579 timecode = cluster_time + block_time - track->codec_delay_in_track_tb;
3580 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3581 timecode < track->end_timecode)
3582 is_keyframe = 0; /* overlapping subtitles are not key frame */
3584 ff_reduce_index(matroska->ctx, st->index);
3585 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3590 if (matroska->skip_to_keyframe &&
3591 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3592 // Compare signed timecodes. Timecode may be negative due to codec delay
3593 // offset. We don't support timestamps greater than int64_t anyway - see
3595 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3598 matroska->skip_to_keyframe = 0;
3599 else if (!st->skip_to_keyframe) {
3600 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3601 matroska->skip_to_keyframe = 0;
3605 res = matroska_parse_laces(matroska, &data, &size, (flags & 0x06) >> 1,
3606 &lace_size, &laces);
3611 if (track->audio.samplerate == 8000) {
3612 // If this is needed for more codecs, then add them here
3613 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3614 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3615 trust_default_duration = 0;
3619 if (!block_duration && trust_default_duration)
3620 block_duration = track->default_duration * laces / matroska->time_scale;
3622 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3623 track->end_timecode =
3624 FFMAX(track->end_timecode, timecode + block_duration);
3626 for (n = 0; n < laces; n++) {
3627 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3629 if (lace_size[n] > size) {
3630 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
3634 if ((st->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
3635 st->codecpar->codec_id == AV_CODEC_ID_COOK ||
3636 st->codecpar->codec_id == AV_CODEC_ID_SIPR ||
3637 st->codecpar->codec_id == AV_CODEC_ID_ATRAC3) &&
3638 st->codecpar->block_align && track->audio.sub_packet_size) {
3639 res = matroska_parse_rm_audio(matroska, track, st, data,
3645 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3646 res = matroska_parse_webvtt(matroska, track, st,
3648 timecode, lace_duration,
3653 res = matroska_parse_frame(matroska, track, st, buf, data, lace_size[n],
3654 timecode, lace_duration, pos,
3655 !n ? is_keyframe : 0,
3656 additional, additional_id, additional_size,
3662 if (timecode != AV_NOPTS_VALUE)
3663 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3664 data += lace_size[n];
3665 size -= lace_size[n];
3673 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3675 MatroskaCluster *cluster = &matroska->current_cluster;
3676 MatroskaBlock *block = &cluster->block;
3679 av_assert0(matroska->num_levels <= 2);
3681 if (matroska->num_levels == 1) {
3682 res = ebml_parse(matroska, matroska_segment, NULL);
3685 /* Found a cluster: subtract the size of the ID already read. */
3686 cluster->pos = avio_tell(matroska->ctx->pb) - 4;
3688 res = ebml_parse(matroska, matroska_cluster_enter, cluster);
3694 if (matroska->num_levels == 2) {
3695 /* We are inside a cluster. */
3696 res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
3698 if (res >= 0 && block->bin.size > 0) {
3699 int is_keyframe = block->non_simple ? block->reference == INT64_MIN : -1;
3700 uint8_t* additional = block->additional.size > 0 ?
3701 block->additional.data : NULL;
3703 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3704 block->bin.size, block->bin.pos,
3705 cluster->timecode, block->duration,
3706 is_keyframe, additional, block->additional_id,
3707 block->additional.size, cluster->pos,
3708 block->discard_padding);
3711 ebml_free(matroska_blockgroup, block);
3712 memset(block, 0, sizeof(*block));
3713 } else if (!matroska->num_levels) {
3714 if (!avio_feof(matroska->ctx->pb)) {
3715 avio_r8(matroska->ctx->pb);
3716 if (!avio_feof(matroska->ctx->pb)) {
3717 av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
3718 "end of segment.\n");
3719 return AVERROR_INVALIDDATA;
3729 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3731 MatroskaDemuxContext *matroska = s->priv_data;
3734 if (matroska->resync_pos == -1) {
3735 // This can only happen if generic seeking has been used.
3736 matroska->resync_pos = avio_tell(s->pb);
3739 while (matroska_deliver_packet(matroska, pkt)) {
3741 return (ret < 0) ? ret : AVERROR_EOF;
3742 if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
3743 ret = matroska_resync(matroska, matroska->resync_pos);
3749 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3750 int64_t timestamp, int flags)
3752 MatroskaDemuxContext *matroska = s->priv_data;
3753 MatroskaTrack *tracks = NULL;
3754 AVStream *st = s->streams[stream_index];
3757 /* Parse the CUES now since we need the index data to seek. */
3758 if (matroska->cues_parsing_deferred > 0) {
3759 matroska->cues_parsing_deferred = 0;
3760 matroska_parse_cues(matroska);
3763 if (!st->nb_index_entries)
3765 timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
3767 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3768 matroska_reset_status(matroska, 0, st->index_entries[st->nb_index_entries - 1].pos);
3769 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->nb_index_entries - 1) {
3770 matroska_clear_queue(matroska);
3771 if (matroska_parse_cluster(matroska) < 0)
3776 matroska_clear_queue(matroska);
3777 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->nb_index_entries - 1))
3780 tracks = matroska->tracks.elem;
3781 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3782 tracks[i].audio.pkt_cnt = 0;
3783 tracks[i].audio.sub_packet_cnt = 0;
3784 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3785 tracks[i].end_timecode = 0;
3788 /* We seek to a level 1 element, so set the appropriate status. */
3789 matroska_reset_status(matroska, 0, st->index_entries[index].pos);
3790 if (flags & AVSEEK_FLAG_ANY) {
3791 st->skip_to_keyframe = 0;
3792 matroska->skip_to_timecode = timestamp;
3794 st->skip_to_keyframe = 1;
3795 matroska->skip_to_timecode = st->index_entries[index].timestamp;
3797 matroska->skip_to_keyframe = 1;
3799 ff_update_cur_dts(s, st, st->index_entries[index].timestamp);
3802 // slightly hackish but allows proper fallback to
3803 // the generic seeking code.
3804 matroska_reset_status(matroska, 0, -1);
3805 matroska->resync_pos = -1;
3806 matroska_clear_queue(matroska);
3807 st->skip_to_keyframe =
3808 matroska->skip_to_keyframe = 0;
3813 static int matroska_read_close(AVFormatContext *s)
3815 MatroskaDemuxContext *matroska = s->priv_data;
3816 MatroskaTrack *tracks = matroska->tracks.elem;
3819 matroska_clear_queue(matroska);
3821 for (n = 0; n < matroska->tracks.nb_elem; n++)
3822 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3823 av_freep(&tracks[n].audio.buf);
3824 ebml_free(matroska_segment, matroska);
3830 int64_t start_time_ns;
3831 int64_t end_time_ns;
3832 int64_t start_offset;
3836 /* This function searches all the Cues and returns the CueDesc corresponding to
3837 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3838 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3840 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3841 MatroskaDemuxContext *matroska = s->priv_data;
3844 int nb_index_entries = s->streams[0]->nb_index_entries;
3845 AVIndexEntry *index_entries = s->streams[0]->index_entries;
3846 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3847 for (i = 1; i < nb_index_entries; i++) {
3848 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3849 index_entries[i].timestamp * matroska->time_scale > ts) {
3854 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3855 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3856 if (i != nb_index_entries - 1) {
3857 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3858 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3860 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3861 // FIXME: this needs special handling for files where Cues appear
3862 // before Clusters. the current logic assumes Cues appear after
3864 cue_desc.end_offset = cues_start - matroska->segment_start;
3869 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3871 MatroskaDemuxContext *matroska = s->priv_data;
3872 uint32_t id = matroska->current_id;
3873 int64_t cluster_pos, before_pos;
3875 if (s->streams[0]->nb_index_entries <= 0) return 0;
3876 // seek to the first cluster using cues.
3877 index = av_index_search_timestamp(s->streams[0], 0, 0);
3878 if (index < 0) return 0;
3879 cluster_pos = s->streams[0]->index_entries[index].pos;
3880 before_pos = avio_tell(s->pb);
3882 uint64_t cluster_id, cluster_length;
3885 avio_seek(s->pb, cluster_pos, SEEK_SET);
3886 // read cluster id and length
3887 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3888 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3890 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3894 matroska_reset_status(matroska, 0, cluster_pos);
3895 matroska_clear_queue(matroska);
3896 if (matroska_parse_cluster(matroska) < 0 ||
3900 pkt = &matroska->queue->pkt;
3901 // 4 + read is the length of the cluster id and the cluster length field.
3902 cluster_pos += 4 + read + cluster_length;
3903 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3909 /* Restore the status after matroska_read_header: */
3910 matroska_reset_status(matroska, id, before_pos);
3915 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3916 double min_buffer, double* buffer,
3917 double* sec_to_download, AVFormatContext *s,
3920 double nano_seconds_per_second = 1000000000.0;
3921 double time_sec = time_ns / nano_seconds_per_second;
3923 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
3924 int64_t end_time_ns = time_ns + time_to_search_ns;
3925 double sec_downloaded = 0.0;
3926 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
3927 if (desc_curr.start_time_ns == -1)
3929 *sec_to_download = 0.0;
3931 // Check for non cue start time.
3932 if (time_ns > desc_curr.start_time_ns) {
3933 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
3934 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
3935 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
3936 double timeToDownload = (cueBytes * 8.0) / bps;
3938 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
3939 *sec_to_download += timeToDownload;
3941 // Check if the search ends within the first cue.
3942 if (desc_curr.end_time_ns >= end_time_ns) {
3943 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3944 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3945 sec_downloaded = percent_to_sub * sec_downloaded;
3946 *sec_to_download = percent_to_sub * *sec_to_download;
3949 if ((sec_downloaded + *buffer) <= min_buffer) {
3953 // Get the next Cue.
3954 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3957 while (desc_curr.start_time_ns != -1) {
3958 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
3959 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
3960 double desc_sec = desc_ns / nano_seconds_per_second;
3961 double bits = (desc_bytes * 8.0);
3962 double time_to_download = bits / bps;
3964 sec_downloaded += desc_sec - time_to_download;
3965 *sec_to_download += time_to_download;
3967 if (desc_curr.end_time_ns >= end_time_ns) {
3968 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
3969 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
3970 sec_downloaded = percent_to_sub * sec_downloaded;
3971 *sec_to_download = percent_to_sub * *sec_to_download;
3973 if ((sec_downloaded + *buffer) <= min_buffer)
3978 if ((sec_downloaded + *buffer) <= min_buffer) {
3983 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
3985 *buffer = *buffer + sec_downloaded;
3989 /* This function computes the bandwidth of the WebM file with the help of
3990 * buffer_size_after_time_downloaded() function. Both of these functions are
3991 * adapted from WebM Tools project and are adapted to work with FFmpeg's
3992 * Matroska parsing mechanism.
3994 * Returns the bandwidth of the file on success; -1 on error.
3996 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
3998 MatroskaDemuxContext *matroska = s->priv_data;
3999 AVStream *st = s->streams[0];
4000 double bandwidth = 0.0;
4003 for (i = 0; i < st->nb_index_entries; i++) {
4004 int64_t prebuffer_ns = 1000000000;
4005 int64_t time_ns = st->index_entries[i].timestamp * matroska->time_scale;
4006 double nano_seconds_per_second = 1000000000.0;
4007 int64_t prebuffered_ns = time_ns + prebuffer_ns;
4008 double prebuffer_bytes = 0.0;
4009 int64_t temp_prebuffer_ns = prebuffer_ns;
4010 int64_t pre_bytes, pre_ns;
4011 double pre_sec, prebuffer, bits_per_second;
4012 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4014 // Start with the first Cue.
4015 CueDesc desc_end = desc_beg;
4017 // Figure out how much data we have downloaded for the prebuffer. This will
4018 // be used later to adjust the bits per sample to try.
4019 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4020 // Prebuffered the entire Cue.
4021 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4022 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4023 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4025 if (desc_end.start_time_ns == -1) {
4026 // The prebuffer is larger than the duration.
4027 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4029 bits_per_second = 0.0;
4031 // The prebuffer ends in the last Cue. Estimate how much data was
4033 pre_bytes = desc_end.end_offset - desc_end.start_offset;
4034 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4035 pre_sec = pre_ns / nano_seconds_per_second;
4037 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4039 prebuffer = prebuffer_ns / nano_seconds_per_second;
4041 // Set this to 0.0 in case our prebuffer buffers the entire video.
4042 bits_per_second = 0.0;
4044 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4045 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4046 double desc_sec = desc_ns / nano_seconds_per_second;
4047 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4049 // Drop the bps by the percentage of bytes buffered.
4050 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4051 double mod_bits_per_second = calc_bits_per_second * percent;
4053 if (prebuffer < desc_sec) {
4055 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4057 // Add 1 so the bits per second should be a little bit greater than file
4059 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4060 const double min_buffer = 0.0;
4061 double buffer = prebuffer;
4062 double sec_to_download = 0.0;
4064 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4065 min_buffer, &buffer, &sec_to_download,
4069 } else if (rv == 0) {
4070 bits_per_second = (double)(bps);
4075 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4076 } while (desc_end.start_time_ns != -1);
4078 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4080 return (int64_t)bandwidth;
4083 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4085 MatroskaDemuxContext *matroska = s->priv_data;
4086 EbmlList *seekhead_list = &matroska->seekhead;
4087 MatroskaSeekhead *seekhead = seekhead_list->elem;
4089 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4093 // determine cues start and end positions
4094 for (i = 0; i < seekhead_list->nb_elem; i++)
4095 if (seekhead[i].id == MATROSKA_ID_CUES)
4098 if (i >= seekhead_list->nb_elem) return -1;
4100 before_pos = avio_tell(matroska->ctx->pb);
4101 cues_start = seekhead[i].pos + matroska->segment_start;
4102 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4103 // cues_end is computed as cues_start + cues_length + length of the
4104 // Cues element ID (i.e. 4) + EBML length of the Cues element.
4105 // cues_end is inclusive and the above sum is reduced by 1.
4106 uint64_t cues_length, cues_id;
4108 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4109 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4110 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4111 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4114 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4116 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4117 if (cues_start == -1 || cues_end == -1) return -1;
4120 matroska_parse_cues(matroska);
4123 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4126 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4128 // if the file has cues at the start, fix up the init range so that
4129 // it does not include it
4130 if (cues_start <= init_range)
4131 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4134 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4135 if (bandwidth < 0) return -1;
4136 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4138 // check if all clusters start with key frames
4139 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4141 // store cue point timestamps as a comma separated list for checking subsegment alignment in
4142 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4143 buf = av_malloc_array(s->streams[0]->nb_index_entries, 20);
4144 if (!buf) return -1;
4146 for (i = 0; i < s->streams[0]->nb_index_entries; i++) {
4147 int ret = snprintf(buf + end, 20,
4148 "%" PRId64"%s", s->streams[0]->index_entries[i].timestamp,
4149 i != s->streams[0]->nb_index_entries - 1 ? "," : "");
4150 if (ret <= 0 || (ret == 20 && i == s->streams[0]->nb_index_entries - 1)) {
4151 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4153 return AVERROR_INVALIDDATA;
4157 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS, buf, 0);
4163 static int webm_dash_manifest_read_header(AVFormatContext *s)
4166 int ret = matroska_read_header(s);
4168 MatroskaTrack *tracks;
4169 MatroskaDemuxContext *matroska = s->priv_data;
4171 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4174 if (!s->nb_streams) {
4175 matroska_read_close(s);
4176 av_log(s, AV_LOG_ERROR, "No streams found\n");
4177 return AVERROR_INVALIDDATA;
4180 if (!matroska->is_live) {
4181 buf = av_asprintf("%g", matroska->duration);
4182 if (!buf) return AVERROR(ENOMEM);
4183 av_dict_set(&s->streams[0]->metadata, DURATION, buf, 0);
4186 // initialization range
4187 // 5 is the offset of Cluster ID.
4188 init_range = avio_tell(s->pb) - 5;
4189 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4192 // basename of the file
4193 buf = strrchr(s->url, '/');
4194 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4197 tracks = matroska->tracks.elem;
4198 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4200 // parse the cues and populate Cue related fields
4201 if (!matroska->is_live) {
4202 ret = webm_dash_manifest_cues(s, init_range);
4204 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4209 // use the bandwidth from the command line if it was provided
4210 if (matroska->bandwidth > 0) {
4211 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4212 matroska->bandwidth, 0);
4217 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4222 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4223 static const AVOption options[] = {
4224 { "live", "flag indicating that the input is a live file that only has the headers.", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
4225 { "bandwidth", "bandwidth of this stream to be specified in the DASH manifest.", OFFSET(bandwidth), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
4229 static const AVClass webm_dash_class = {
4230 .class_name = "WebM DASH Manifest demuxer",
4231 .item_name = av_default_item_name,
4233 .version = LIBAVUTIL_VERSION_INT,
4236 AVInputFormat ff_matroska_demuxer = {
4237 .name = "matroska,webm",
4238 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4239 .extensions = "mkv,mk3d,mka,mks",
4240 .priv_data_size = sizeof(MatroskaDemuxContext),
4241 .read_probe = matroska_probe,
4242 .read_header = matroska_read_header,
4243 .read_packet = matroska_read_packet,
4244 .read_close = matroska_read_close,
4245 .read_seek = matroska_read_seek,
4246 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4249 AVInputFormat ff_webm_dash_manifest_demuxer = {
4250 .name = "webm_dash_manifest",
4251 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4252 .priv_data_size = sizeof(MatroskaDemuxContext),
4253 .read_header = webm_dash_manifest_read_header,
4254 .read_packet = webm_dash_manifest_read_packet,
4255 .read_close = matroska_read_close,
4256 .priv_class = &webm_dash_class,