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"
51 #include "libavcodec/packet_internal.h"
54 #include "avio_internal.h"
59 /* For ff_codec_get_id(). */
70 #include "qtpalette.h"
72 #define EBML_UNKNOWN_LENGTH UINT64_MAX /* EBML unknown length, in uint64_t */
73 #define NEEDS_CHECKING 2 /* Indicates that some error checks
74 * still need to be performed */
75 #define LEVEL_ENDED 3 /* return value of ebml_parse when the
76 * syntax level used for parsing ended. */
77 #define SKIP_THRESHOLD 1024 * 1024 /* In non-seekable mode, if more than SKIP_THRESHOLD
78 * of unkown, potentially damaged data is encountered,
79 * it is considered an error. */
80 #define UNKNOWN_EQUIV 50 * 1024 /* An unknown element is considered equivalent
81 * to this many bytes of unknown data for the
82 * SKIP_THRESHOLD check. */
98 typedef struct CountedElement {
108 typedef const struct EbmlSyntax {
112 size_t list_elem_size;
119 const struct EbmlSyntax *n;
123 typedef struct EbmlList {
125 unsigned int alloc_elem_size;
129 typedef struct EbmlBin {
136 typedef struct Ebml {
141 uint64_t doctype_version;
144 typedef struct MatroskaTrackCompression {
147 } MatroskaTrackCompression;
149 typedef struct MatroskaTrackEncryption {
152 } MatroskaTrackEncryption;
154 typedef struct MatroskaTrackEncoding {
157 MatroskaTrackCompression compression;
158 MatroskaTrackEncryption encryption;
159 } MatroskaTrackEncoding;
161 typedef struct MatroskaMasteringMeta {
170 double max_luminance;
171 CountedElement min_luminance;
172 } MatroskaMasteringMeta;
174 typedef struct MatroskaTrackVideoColor {
175 uint64_t matrix_coefficients;
176 uint64_t bits_per_channel;
177 uint64_t chroma_sub_horz;
178 uint64_t chroma_sub_vert;
179 uint64_t cb_sub_horz;
180 uint64_t cb_sub_vert;
181 uint64_t chroma_siting_horz;
182 uint64_t chroma_siting_vert;
184 uint64_t transfer_characteristics;
188 MatroskaMasteringMeta mastering_meta;
189 } MatroskaTrackVideoColor;
191 typedef struct MatroskaTrackVideoProjection {
197 } MatroskaTrackVideoProjection;
199 typedef struct MatroskaTrackVideo {
201 uint64_t display_width;
202 uint64_t display_height;
203 uint64_t pixel_width;
204 uint64_t pixel_height;
206 uint64_t display_unit;
208 uint64_t field_order;
209 uint64_t stereo_mode;
212 MatroskaTrackVideoProjection projection;
213 } MatroskaTrackVideo;
215 typedef struct MatroskaTrackAudio {
217 double out_samplerate;
221 /* real audio header (extracted from extradata) */
228 uint64_t buf_timecode;
230 } MatroskaTrackAudio;
232 typedef struct MatroskaTrackPlane {
235 } MatroskaTrackPlane;
237 typedef struct MatroskaTrackOperation {
238 EbmlList combine_planes;
239 } MatroskaTrackOperation;
241 typedef struct MatroskaTrack {
250 uint64_t default_duration;
251 uint64_t flag_default;
252 uint64_t flag_forced;
253 uint64_t flag_comment;
254 uint64_t flag_hearingimpaired;
255 uint64_t flag_visualimpaired;
256 uint64_t flag_textdescriptions;
257 CountedElement flag_original;
258 uint64_t seek_preroll;
259 MatroskaTrackVideo video;
260 MatroskaTrackAudio audio;
261 MatroskaTrackOperation operation;
263 uint64_t codec_delay;
264 uint64_t codec_delay_in_track_tb;
267 int64_t end_timecode;
270 uint64_t max_block_additional_id;
272 uint32_t palette[AVPALETTE_COUNT];
276 typedef struct MatroskaAttachment {
284 } MatroskaAttachment;
286 typedef struct MatroskaChapter {
295 typedef struct MatroskaIndexPos {
300 typedef struct MatroskaIndex {
305 typedef struct MatroskaTag {
313 typedef struct MatroskaTagTarget {
321 typedef struct MatroskaTags {
322 MatroskaTagTarget target;
326 typedef struct MatroskaSeekhead {
331 typedef struct MatroskaLevel {
336 typedef struct MatroskaBlock {
338 CountedElement reference;
341 uint64_t additional_id;
343 int64_t discard_padding;
346 typedef struct MatroskaCluster {
352 typedef struct MatroskaLevel1Element {
356 } MatroskaLevel1Element;
358 typedef struct MatroskaDemuxContext {
359 const AVClass *class;
360 AVFormatContext *ctx;
363 MatroskaLevel levels[EBML_MAX_DEPTH];
375 EbmlList attachments;
381 /* byte position of the segment inside the stream */
382 int64_t segment_start;
384 /* the packet queue */
386 PacketList *queue_end;
390 /* What to skip before effectively reading a packet. */
391 int skip_to_keyframe;
392 uint64_t skip_to_timecode;
394 /* File has a CUES element, but we defer parsing until it is needed. */
395 int cues_parsing_deferred;
397 /* Level1 elements and whether they were read yet */
398 MatroskaLevel1Element level1_elems[64];
399 int num_level1_elems;
401 MatroskaCluster current_cluster;
403 /* WebM DASH Manifest live flag */
406 /* Bandwidth value for WebM DASH Manifest */
408 } MatroskaDemuxContext;
410 #define CHILD_OF(parent) { .def = { .n = parent } }
412 // The following forward declarations need their size because
413 // a tentative definition with internal linkage must not be an
414 // incomplete type (6.7.2 in C90, 6.9.2 in C99).
415 // Removing the sizes breaks MSVC.
416 static EbmlSyntax ebml_syntax[3], matroska_segment[9], matroska_track_video_color[15], matroska_track_video[19],
417 matroska_track[32], matroska_track_encoding[6], matroska_track_encodings[2],
418 matroska_track_combine_planes[2], matroska_track_operation[2], matroska_tracks[2],
419 matroska_attachments[2], matroska_chapter_entry[9], matroska_chapter[6], matroska_chapters[2],
420 matroska_index_entry[3], matroska_index[2], matroska_tag[3], matroska_tags[2], matroska_seekhead[2],
421 matroska_blockadditions[2], matroska_blockgroup[8], matroska_cluster_parsing[8];
423 static EbmlSyntax ebml_header[] = {
424 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, version), { .u = EBML_VERSION } },
425 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, 0, offsetof(Ebml, max_size), { .u = 8 } },
426 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, 0, offsetof(Ebml, id_length), { .u = 4 } },
427 { EBML_ID_DOCTYPE, EBML_STR, 0, 0, offsetof(Ebml, doctype), { .s = "(none)" } },
428 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, 0, offsetof(Ebml, doctype_version), { .u = 1 } },
429 { EBML_ID_EBMLVERSION, EBML_NONE },
430 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
431 CHILD_OF(ebml_syntax)
434 static EbmlSyntax ebml_syntax[] = {
435 { EBML_ID_HEADER, EBML_NEST, 0, 0, 0, { .n = ebml_header } },
436 { MATROSKA_ID_SEGMENT, EBML_STOP },
440 static EbmlSyntax matroska_info[] = {
441 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, 0, offsetof(MatroskaDemuxContext, time_scale), { .u = 1000000 } },
442 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, 0, offsetof(MatroskaDemuxContext, duration) },
443 { MATROSKA_ID_TITLE, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, title) },
444 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
445 { MATROSKA_ID_MUXINGAPP, EBML_UTF8, 0, 0, offsetof(MatroskaDemuxContext, muxingapp) },
446 { MATROSKA_ID_DATEUTC, EBML_BIN, 0, 0, offsetof(MatroskaDemuxContext, date_utc) },
447 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
448 CHILD_OF(matroska_segment)
451 static EbmlSyntax matroska_mastering_meta[] = {
452 { MATROSKA_ID_VIDEOCOLOR_RX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_x) },
453 { MATROSKA_ID_VIDEOCOLOR_RY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, r_y) },
454 { MATROSKA_ID_VIDEOCOLOR_GX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_x) },
455 { MATROSKA_ID_VIDEOCOLOR_GY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, g_y) },
456 { MATROSKA_ID_VIDEOCOLOR_BX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_x) },
457 { MATROSKA_ID_VIDEOCOLOR_BY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, b_y) },
458 { MATROSKA_ID_VIDEOCOLOR_WHITEX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_x) },
459 { MATROSKA_ID_VIDEOCOLOR_WHITEY, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, white_y) },
460 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, EBML_FLOAT, 1, 0, offsetof(MatroskaMasteringMeta, min_luminance) },
461 { MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, EBML_FLOAT, 0, 0, offsetof(MatroskaMasteringMeta, max_luminance) },
462 CHILD_OF(matroska_track_video_color)
465 static EbmlSyntax matroska_track_video_color[] = {
466 { MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, matrix_coefficients), { .u = AVCOL_SPC_UNSPECIFIED } },
467 { MATROSKA_ID_VIDEOCOLORBITSPERCHANNEL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, bits_per_channel), { .u = 0 } },
468 { MATROSKA_ID_VIDEOCOLORCHROMASUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_horz) },
469 { MATROSKA_ID_VIDEOCOLORCHROMASUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_sub_vert) },
470 { MATROSKA_ID_VIDEOCOLORCBSUBHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_horz) },
471 { MATROSKA_ID_VIDEOCOLORCBSUBVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, cb_sub_vert) },
472 { MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_horz), { .u = MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED } },
473 { MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, chroma_siting_vert), { .u = MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED } },
474 { MATROSKA_ID_VIDEOCOLORRANGE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, range), { .u = AVCOL_RANGE_UNSPECIFIED } },
475 { MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, transfer_characteristics), { .u = AVCOL_TRC_UNSPECIFIED } },
476 { MATROSKA_ID_VIDEOCOLORPRIMARIES, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, primaries), { .u = AVCOL_PRI_UNSPECIFIED } },
477 { MATROSKA_ID_VIDEOCOLORMAXCLL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_cll) },
478 { MATROSKA_ID_VIDEOCOLORMAXFALL, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoColor, max_fall) },
479 { MATROSKA_ID_VIDEOCOLORMASTERINGMETA, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideoColor, mastering_meta), { .n = matroska_mastering_meta } },
480 CHILD_OF(matroska_track_video)
483 static EbmlSyntax matroska_track_video_projection[] = {
484 { MATROSKA_ID_VIDEOPROJECTIONTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideoProjection, type), { .u = MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR } },
485 { MATROSKA_ID_VIDEOPROJECTIONPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideoProjection, private) },
486 { MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, yaw), { .f = 0.0 } },
487 { MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, pitch), { .f = 0.0 } },
488 { MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideoProjection, roll), { .f = 0.0 } },
489 CHILD_OF(matroska_track_video)
492 static EbmlSyntax matroska_track_video[] = {
493 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackVideo, frame_rate) },
494 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_width), { .u=-1 } },
495 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_height), { .u=-1 } },
496 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_width) },
497 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, pixel_height) },
498 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_BIN, 0, 0, offsetof(MatroskaTrackVideo, color_space) },
499 { MATROSKA_ID_VIDEOALPHAMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, alpha_mode), { .u = 0 } },
500 { MATROSKA_ID_VIDEOCOLOR, EBML_NEST, 0, sizeof(MatroskaTrackVideoColor), offsetof(MatroskaTrackVideo, color), { .n = matroska_track_video_color } },
501 { MATROSKA_ID_VIDEOPROJECTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackVideo, projection), { .n = matroska_track_video_projection } },
502 { MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
503 { MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
504 { MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
505 { MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
506 { MATROSKA_ID_VIDEODISPLAYUNIT, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, display_unit), { .u= MATROSKA_VIDEO_DISPLAYUNIT_PIXELS } },
507 { MATROSKA_ID_VIDEOFLAGINTERLACED, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, interlaced), { .u = MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED } },
508 { MATROSKA_ID_VIDEOFIELDORDER, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, field_order), { .u = MATROSKA_VIDEO_FIELDORDER_UNDETERMINED } },
509 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_UINT, 0, 0, offsetof(MatroskaTrackVideo, stereo_mode), { .u = MATROSKA_VIDEO_STEREOMODE_TYPE_NB } },
510 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
511 CHILD_OF(matroska_track)
514 static EbmlSyntax matroska_track_audio[] = {
515 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, samplerate), { .f = 8000.0 } },
516 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, EBML_FLOAT, 0, 0, offsetof(MatroskaTrackAudio, out_samplerate) },
517 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, bitdepth) },
518 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, 0, offsetof(MatroskaTrackAudio, channels), { .u = 1 } },
519 CHILD_OF(matroska_track)
522 static EbmlSyntax matroska_track_encoding_compression[] = {
523 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackCompression, algo), { .u = MATROSKA_TRACK_ENCODING_COMP_ZLIB } },
524 { MATROSKA_ID_ENCODINGCOMPSETTINGS, EBML_BIN, 0, 0, offsetof(MatroskaTrackCompression, settings) },
525 CHILD_OF(matroska_track_encoding)
528 static EbmlSyntax matroska_track_encoding_encryption[] = {
529 { MATROSKA_ID_ENCODINGENCALGO, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncryption,algo), {.u = 0} },
530 { MATROSKA_ID_ENCODINGENCKEYID, EBML_BIN, 0, 0, offsetof(MatroskaTrackEncryption,key_id) },
531 { MATROSKA_ID_ENCODINGENCAESSETTINGS, EBML_NONE },
532 { MATROSKA_ID_ENCODINGSIGALGO, EBML_NONE },
533 { MATROSKA_ID_ENCODINGSIGHASHALGO, EBML_NONE },
534 { MATROSKA_ID_ENCODINGSIGKEYID, EBML_NONE },
535 { MATROSKA_ID_ENCODINGSIGNATURE, EBML_NONE },
536 CHILD_OF(matroska_track_encoding)
538 static EbmlSyntax matroska_track_encoding[] = {
539 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, scope), { .u = 1 } },
540 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackEncoding, type), { .u = 0 } },
541 { MATROSKA_ID_ENCODINGCOMPRESSION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, compression), { .n = matroska_track_encoding_compression } },
542 { MATROSKA_ID_ENCODINGENCRYPTION, EBML_NEST, 0, 0, offsetof(MatroskaTrackEncoding, encryption), { .n = matroska_track_encoding_encryption } },
543 { MATROSKA_ID_ENCODINGORDER, EBML_NONE },
544 CHILD_OF(matroska_track_encodings)
547 static EbmlSyntax matroska_track_encodings[] = {
548 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, 0, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack, encodings), { .n = matroska_track_encoding } },
549 CHILD_OF(matroska_track)
552 static EbmlSyntax matroska_track_plane[] = {
553 { MATROSKA_ID_TRACKPLANEUID, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,uid) },
554 { MATROSKA_ID_TRACKPLANETYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrackPlane,type) },
555 CHILD_OF(matroska_track_combine_planes)
558 static EbmlSyntax matroska_track_combine_planes[] = {
559 { MATROSKA_ID_TRACKPLANE, EBML_NEST, 0, sizeof(MatroskaTrackPlane), offsetof(MatroskaTrackOperation,combine_planes), {.n = matroska_track_plane} },
560 CHILD_OF(matroska_track_operation)
563 static EbmlSyntax matroska_track_operation[] = {
564 { MATROSKA_ID_TRACKCOMBINEPLANES, EBML_NEST, 0, 0, 0, {.n = matroska_track_combine_planes} },
565 CHILD_OF(matroska_track)
568 static EbmlSyntax matroska_track[] = {
569 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, 0, offsetof(MatroskaTrack, num) },
570 { MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTrack, name) },
571 { MATROSKA_ID_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, uid) },
572 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, 0, offsetof(MatroskaTrack, type) },
573 { MATROSKA_ID_CODECID, EBML_STR, 0, 0, offsetof(MatroskaTrack, codec_id) },
574 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, 0, offsetof(MatroskaTrack, codec_priv) },
575 { MATROSKA_ID_CODECDELAY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, codec_delay), { .u = 0 } },
576 { MATROSKA_ID_TRACKLANGUAGE, EBML_STR, 0, 0, offsetof(MatroskaTrack, language), { .s = "eng" } },
577 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, 0, offsetof(MatroskaTrack, default_duration) },
578 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT, 0, 0, offsetof(MatroskaTrack, time_scale), { .f = 1.0 } },
579 { MATROSKA_ID_TRACKFLAGCOMMENTARY, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_comment), { .u = 0 } },
580 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_default), { .u = 1 } },
581 { MATROSKA_ID_TRACKFLAGFORCED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_forced), { .u = 0 } },
582 { MATROSKA_ID_TRACKFLAGHEARINGIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_hearingimpaired), { .u = 0 } },
583 { MATROSKA_ID_TRACKFLAGVISUALIMPAIRED, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_visualimpaired), { .u = 0 } },
584 { MATROSKA_ID_TRACKFLAGTEXTDESCRIPTIONS, EBML_UINT, 0, 0, offsetof(MatroskaTrack, flag_textdescriptions), { .u = 0 } },
585 { MATROSKA_ID_TRACKFLAGORIGINAL, EBML_UINT, 1, 0, offsetof(MatroskaTrack, flag_original), {.u = 0 } },
586 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, video), { .n = matroska_track_video } },
587 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, 0, offsetof(MatroskaTrack, audio), { .n = matroska_track_audio } },
588 { MATROSKA_ID_TRACKOPERATION, EBML_NEST, 0, 0, offsetof(MatroskaTrack, operation), { .n = matroska_track_operation } },
589 { MATROSKA_ID_TRACKCONTENTENCODINGS, EBML_NEST, 0, 0, 0, { .n = matroska_track_encodings } },
590 { MATROSKA_ID_TRACKMAXBLKADDID, EBML_UINT, 0, 0, offsetof(MatroskaTrack, max_block_additional_id), { .u = 0 } },
591 { MATROSKA_ID_SEEKPREROLL, EBML_UINT, 0, 0, offsetof(MatroskaTrack, seek_preroll), { .u = 0 } },
592 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
593 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
594 { MATROSKA_ID_CODECNAME, EBML_NONE },
595 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
596 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
597 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
598 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
599 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
600 CHILD_OF(matroska_tracks)
603 static EbmlSyntax matroska_tracks[] = {
604 { MATROSKA_ID_TRACKENTRY, EBML_NEST, 0, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext, tracks), { .n = matroska_track } },
605 CHILD_OF(matroska_segment)
608 static EbmlSyntax matroska_attachment[] = {
609 { MATROSKA_ID_FILEUID, EBML_UINT, 0, 0, offsetof(MatroskaAttachment, uid) },
610 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, filename) },
611 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, 0, offsetof(MatroskaAttachment, mime) },
612 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, 0, offsetof(MatroskaAttachment, bin) },
613 { MATROSKA_ID_FILEDESC, EBML_UTF8, 0, 0, offsetof(MatroskaAttachment, description) },
614 CHILD_OF(matroska_attachments)
617 static EbmlSyntax matroska_attachments[] = {
618 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, 0, sizeof(MatroskaAttachment), offsetof(MatroskaDemuxContext, attachments), { .n = matroska_attachment } },
619 CHILD_OF(matroska_segment)
622 static EbmlSyntax matroska_chapter_display[] = {
623 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaChapter, title) },
624 { MATROSKA_ID_CHAPLANG, EBML_NONE },
625 { MATROSKA_ID_CHAPCOUNTRY, EBML_NONE },
626 CHILD_OF(matroska_chapter_entry)
629 static EbmlSyntax matroska_chapter_entry[] = {
630 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, 0, offsetof(MatroskaChapter, start), { .u = AV_NOPTS_VALUE } },
631 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, 0, offsetof(MatroskaChapter, end), { .u = AV_NOPTS_VALUE } },
632 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaChapter, uid) },
633 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter_display } },
634 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
635 { MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
636 { MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
637 { MATROSKA_ID_CHAPTERATOM, EBML_NONE },
638 CHILD_OF(matroska_chapter)
641 static EbmlSyntax matroska_chapter[] = {
642 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, 0, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext, chapters), { .n = matroska_chapter_entry } },
643 { MATROSKA_ID_EDITIONUID, EBML_NONE },
644 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
645 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
646 { MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
647 CHILD_OF(matroska_chapters)
650 static EbmlSyntax matroska_chapters[] = {
651 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, 0, { .n = matroska_chapter } },
652 CHILD_OF(matroska_segment)
655 static EbmlSyntax matroska_index_pos[] = {
656 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, track) },
657 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaIndexPos, pos) },
658 { MATROSKA_ID_CUERELATIVEPOSITION,EBML_NONE },
659 { MATROSKA_ID_CUEDURATION, EBML_NONE },
660 { MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
661 CHILD_OF(matroska_index_entry)
664 static EbmlSyntax matroska_index_entry[] = {
665 { MATROSKA_ID_CUETIME, EBML_UINT, 0, 0, offsetof(MatroskaIndex, time) },
666 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, 0, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex, pos), { .n = matroska_index_pos } },
667 CHILD_OF(matroska_index)
670 static EbmlSyntax matroska_index[] = {
671 { MATROSKA_ID_POINTENTRY, EBML_NEST, 0, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext, index), { .n = matroska_index_entry } },
672 CHILD_OF(matroska_segment)
675 static EbmlSyntax matroska_simpletag[] = {
676 { MATROSKA_ID_TAGNAME, EBML_UTF8, 0, 0, offsetof(MatroskaTag, name) },
677 { MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, 0, offsetof(MatroskaTag, string) },
678 { MATROSKA_ID_TAGLANG, EBML_STR, 0, 0, offsetof(MatroskaTag, lang), { .s = "und" } },
679 { MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
680 { MATROSKA_ID_TAGDEFAULT_BUG, EBML_UINT, 0, 0, offsetof(MatroskaTag, def) },
681 { MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTag, sub), { .n = matroska_simpletag } },
682 CHILD_OF(matroska_tag)
685 static EbmlSyntax matroska_tagtargets[] = {
686 { MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, 0, offsetof(MatroskaTagTarget, type) },
687 { MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, typevalue), { .u = 50 } },
688 { MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, trackuid), { .u = 0 } },
689 { MATROSKA_ID_TAGTARGETS_CHAPTERUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, chapteruid), { .u = 0 } },
690 { MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, 0, offsetof(MatroskaTagTarget, attachuid), { .u = 0 } },
691 CHILD_OF(matroska_tag)
694 static EbmlSyntax matroska_tag[] = {
695 { MATROSKA_ID_SIMPLETAG, EBML_NEST, 0, sizeof(MatroskaTag), offsetof(MatroskaTags, tag), { .n = matroska_simpletag } },
696 { MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, 0, offsetof(MatroskaTags, target), { .n = matroska_tagtargets } },
697 CHILD_OF(matroska_tags)
700 static EbmlSyntax matroska_tags[] = {
701 { MATROSKA_ID_TAG, EBML_NEST, 0, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext, tags), { .n = matroska_tag } },
702 CHILD_OF(matroska_segment)
705 static EbmlSyntax matroska_seekhead_entry[] = {
706 { MATROSKA_ID_SEEKID, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, id) },
707 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, 0, offsetof(MatroskaSeekhead, pos), { .u = -1 } },
708 CHILD_OF(matroska_seekhead)
711 static EbmlSyntax matroska_seekhead[] = {
712 { MATROSKA_ID_SEEKENTRY, EBML_NEST, 0, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext, seekhead), { .n = matroska_seekhead_entry } },
713 CHILD_OF(matroska_segment)
716 static EbmlSyntax matroska_segment[] = {
717 { MATROSKA_ID_CLUSTER, EBML_STOP },
718 { MATROSKA_ID_INFO, EBML_LEVEL1, 0, 0, 0, { .n = matroska_info } },
719 { MATROSKA_ID_TRACKS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tracks } },
720 { MATROSKA_ID_ATTACHMENTS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_attachments } },
721 { MATROSKA_ID_CHAPTERS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_chapters } },
722 { MATROSKA_ID_CUES, EBML_LEVEL1, 0, 0, 0, { .n = matroska_index } },
723 { MATROSKA_ID_TAGS, EBML_LEVEL1, 0, 0, 0, { .n = matroska_tags } },
724 { MATROSKA_ID_SEEKHEAD, EBML_LEVEL1, 0, 0, 0, { .n = matroska_seekhead } },
725 { 0 } /* We don't want to go back to level 0, so don't add the parent. */
728 static EbmlSyntax matroska_segments[] = {
729 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, 0, { .n = matroska_segment } },
733 static EbmlSyntax matroska_blockmore[] = {
734 { MATROSKA_ID_BLOCKADDID, EBML_UINT, 0, 0, offsetof(MatroskaBlock,additional_id), { .u = 1 } },
735 { MATROSKA_ID_BLOCKADDITIONAL, EBML_BIN, 0, 0, offsetof(MatroskaBlock,additional) },
736 CHILD_OF(matroska_blockadditions)
739 static EbmlSyntax matroska_blockadditions[] = {
740 { MATROSKA_ID_BLOCKMORE, EBML_NEST, 0, 0, 0, {.n = matroska_blockmore} },
741 CHILD_OF(matroska_blockgroup)
744 static EbmlSyntax matroska_blockgroup[] = {
745 { MATROSKA_ID_BLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
746 { MATROSKA_ID_BLOCKADDITIONS, EBML_NEST, 0, 0, 0, { .n = matroska_blockadditions} },
747 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, 0, offsetof(MatroskaBlock, duration) },
748 { MATROSKA_ID_DISCARDPADDING, EBML_SINT, 0, 0, offsetof(MatroskaBlock, discard_padding) },
749 { MATROSKA_ID_BLOCKREFERENCE, EBML_SINT, 1, 0, offsetof(MatroskaBlock, reference) },
750 { MATROSKA_ID_CODECSTATE, EBML_NONE },
751 { 1, EBML_UINT, 0, 0, offsetof(MatroskaBlock, non_simple), { .u = 1 } },
752 CHILD_OF(matroska_cluster_parsing)
755 // The following array contains SimpleBlock and BlockGroup twice
756 // in order to reuse the other values for matroska_cluster_enter.
757 static EbmlSyntax matroska_cluster_parsing[] = {
758 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, 0, offsetof(MatroskaBlock, bin) },
759 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, 0, 0, 0, { .n = matroska_blockgroup } },
760 { MATROSKA_ID_CLUSTERTIMECODE, EBML_UINT, 0, 0, offsetof(MatroskaCluster, timecode) },
761 { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
762 { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
763 { MATROSKA_ID_CLUSTERPOSITION, EBML_NONE },
764 { MATROSKA_ID_CLUSTERPREVSIZE, EBML_NONE },
765 CHILD_OF(matroska_segment)
768 static EbmlSyntax matroska_cluster_enter[] = {
769 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, 0, { .n = &matroska_cluster_parsing[2] } },
774 static const CodecMime mkv_image_mime_tags[] = {
775 {"image/gif" , AV_CODEC_ID_GIF},
776 {"image/jpeg" , AV_CODEC_ID_MJPEG},
777 {"image/png" , AV_CODEC_ID_PNG},
778 {"image/tiff" , AV_CODEC_ID_TIFF},
780 {"" , AV_CODEC_ID_NONE}
783 static const CodecMime mkv_mime_tags[] = {
784 {"text/plain" , AV_CODEC_ID_TEXT},
785 {"application/x-truetype-font", AV_CODEC_ID_TTF},
786 {"application/x-font" , AV_CODEC_ID_TTF},
787 {"application/vnd.ms-opentype", AV_CODEC_ID_OTF},
788 {"binary" , AV_CODEC_ID_BIN_DATA},
790 {"" , AV_CODEC_ID_NONE}
793 static const char *const matroska_doctypes[] = { "matroska", "webm" };
795 static int matroska_read_close(AVFormatContext *s);
798 * This function prepares the status for parsing of level 1 elements.
800 static int matroska_reset_status(MatroskaDemuxContext *matroska,
801 uint32_t id, int64_t position)
804 int64_t err = avio_seek(matroska->ctx->pb, position, SEEK_SET);
809 matroska->current_id = id;
810 matroska->num_levels = 1;
811 matroska->unknown_count = 0;
812 matroska->resync_pos = avio_tell(matroska->ctx->pb);
814 matroska->resync_pos -= (av_log2(id) + 7) / 8;
819 static int matroska_resync(MatroskaDemuxContext *matroska, int64_t last_pos)
821 AVIOContext *pb = matroska->ctx->pb;
824 /* Try to seek to the last position to resync from. If this doesn't work,
825 * we resync from the earliest position available: The start of the buffer. */
826 if (last_pos < avio_tell(pb) && avio_seek(pb, last_pos + 1, SEEK_SET) < 0) {
827 av_log(matroska->ctx, AV_LOG_WARNING,
828 "Seek to desired resync point failed. Seeking to "
829 "earliest point available instead.\n");
830 avio_seek(pb, FFMAX(avio_tell(pb) + (pb->buffer - pb->buf_ptr),
831 last_pos + 1), SEEK_SET);
836 // try to find a toplevel element
837 while (!avio_feof(pb)) {
838 if (id == MATROSKA_ID_INFO || id == MATROSKA_ID_TRACKS ||
839 id == MATROSKA_ID_CUES || id == MATROSKA_ID_TAGS ||
840 id == MATROSKA_ID_SEEKHEAD || id == MATROSKA_ID_ATTACHMENTS ||
841 id == MATROSKA_ID_CLUSTER || id == MATROSKA_ID_CHAPTERS) {
842 /* Prepare the context for parsing of a level 1 element. */
843 matroska_reset_status(matroska, id, -1);
844 /* Given that we are here means that an error has occurred,
845 * so treat the segment as unknown length in order not to
846 * discard valid data that happens to be beyond the designated
847 * end of the segment. */
848 matroska->levels[0].length = EBML_UNKNOWN_LENGTH;
851 id = (id << 8) | avio_r8(pb);
855 return pb->error ? pb->error : AVERROR_EOF;
859 * Read: an "EBML number", which is defined as a variable-length
860 * array of bytes. The first byte indicates the length by giving a
861 * number of 0-bits followed by a one. The position of the first
862 * "one" bit inside the first byte indicates the length of this
864 * Returns: number of bytes read, < 0 on error
866 static int ebml_read_num(MatroskaDemuxContext *matroska, AVIOContext *pb,
867 int max_size, uint64_t *number, int eof_forbidden)
873 /* The first byte tells us the length in bytes - except when it is zero. */
878 /* get the length of the EBML number */
879 read = 8 - ff_log2_tab[total];
881 if (!total || read > max_size) {
882 pos = avio_tell(pb) - 1;
884 av_log(matroska->ctx, AV_LOG_ERROR,
885 "0x00 at pos %"PRId64" (0x%"PRIx64") invalid as first byte "
886 "of an EBML number\n", pos, pos);
888 av_log(matroska->ctx, AV_LOG_ERROR,
889 "Length %d indicated by an EBML number's first byte 0x%02x "
890 "at pos %"PRId64" (0x%"PRIx64") exceeds max length %d.\n",
891 read, (uint8_t) total, pos, pos, max_size);
893 return AVERROR_INVALIDDATA;
896 /* read out length */
897 total ^= 1 << ff_log2_tab[total];
899 total = (total << 8) | avio_r8(pb);
901 if (pb->eof_reached) {
913 av_log(matroska->ctx, AV_LOG_ERROR,
914 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
919 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
920 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
927 * Read a EBML length value.
928 * This needs special handling for the "unknown length" case which has multiple
931 static int ebml_read_length(MatroskaDemuxContext *matroska, AVIOContext *pb,
934 int res = ebml_read_num(matroska, pb, 8, number, 1);
935 if (res > 0 && *number + 1 == 1ULL << (7 * res))
936 *number = EBML_UNKNOWN_LENGTH;
941 * Read the next element as an unsigned int.
942 * Returns NEEDS_CHECKING unless size == 0.
944 static int ebml_read_uint(AVIOContext *pb, int size,
945 uint64_t default_value, uint64_t *num)
950 *num = default_value;
953 /* big-endian ordering; build up number */
956 *num = (*num << 8) | avio_r8(pb);
958 return NEEDS_CHECKING;
962 * Read the next element as a signed int.
963 * Returns NEEDS_CHECKING unless size == 0.
965 static int ebml_read_sint(AVIOContext *pb, int size,
966 int64_t default_value, int64_t *num)
971 *num = default_value;
974 *num = sign_extend(avio_r8(pb), 8);
976 /* big-endian ordering; build up number */
978 *num = ((uint64_t)*num << 8) | avio_r8(pb);
981 return NEEDS_CHECKING;
985 * Read the next element as a float.
986 * Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
988 static int ebml_read_float(AVIOContext *pb, int size,
989 double default_value, double *num)
992 *num = default_value;
994 } else if (size == 4) {
995 *num = av_int2float(avio_rb32(pb));
996 } else if (size == 8) {
997 *num = av_int2double(avio_rb64(pb));
999 return AVERROR_INVALIDDATA;
1001 return NEEDS_CHECKING;
1005 * Read the next element as an ASCII string.
1006 * 0 is success, < 0 or NEEDS_CHECKING is failure.
1008 static int ebml_read_ascii(AVIOContext *pb, int size,
1009 const char *default_value, char **str)
1014 if (size == 0 && default_value) {
1015 res = av_strdup(default_value);
1017 return AVERROR(ENOMEM);
1019 /* EBML strings are usually not 0-terminated, so we allocate one
1020 * byte more, read the string and NUL-terminate it ourselves. */
1021 if (!(res = av_malloc(size + 1)))
1022 return AVERROR(ENOMEM);
1023 if ((ret = avio_read(pb, (uint8_t *) res, size)) != size) {
1025 return ret < 0 ? ret : NEEDS_CHECKING;
1036 * Read the next element as binary data.
1037 * 0 is success, < 0 or NEEDS_CHECKING is failure.
1039 static int ebml_read_binary(AVIOContext *pb, int length,
1040 int64_t pos, EbmlBin *bin)
1044 ret = av_buffer_realloc(&bin->buf, length + AV_INPUT_BUFFER_PADDING_SIZE);
1047 memset(bin->buf->data + length, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1049 bin->data = bin->buf->data;
1052 if ((ret = avio_read(pb, bin->data, length)) != length) {
1053 av_buffer_unref(&bin->buf);
1056 return ret < 0 ? ret : NEEDS_CHECKING;
1063 * Read the next element, but only the header. The contents
1064 * are supposed to be sub-elements which can be read separately.
1065 * 0 is success, < 0 is failure.
1067 static int ebml_read_master(MatroskaDemuxContext *matroska,
1068 uint64_t length, int64_t pos)
1070 MatroskaLevel *level;
1072 if (matroska->num_levels >= EBML_MAX_DEPTH) {
1073 av_log(matroska->ctx, AV_LOG_ERROR,
1074 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
1075 return AVERROR(ENOSYS);
1078 level = &matroska->levels[matroska->num_levels++];
1080 level->length = length;
1086 * Read a signed "EBML number"
1087 * Return: number of bytes processed, < 0 on error
1089 static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
1090 AVIOContext *pb, int64_t *num)
1095 /* read as unsigned number first */
1096 if ((res = ebml_read_num(matroska, pb, 8, &unum, 1)) < 0)
1099 /* make signed (weird way) */
1100 *num = unum - ((1LL << (7 * res - 1)) - 1);
1105 static int ebml_parse(MatroskaDemuxContext *matroska,
1106 EbmlSyntax *syntax, void *data);
1108 static EbmlSyntax *ebml_parse_id(EbmlSyntax *syntax, uint32_t id)
1112 // Whoever touches this should be aware of the duplication
1113 // existing in matroska_cluster_parsing.
1114 for (i = 0; syntax[i].id; i++)
1115 if (id == syntax[i].id)
1121 static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
1127 for (int i = 0; syntax[i].id; i++) {
1128 void *dst = (char *)data + syntax[i].data_offset;
1129 switch (syntax[i].type) {
1131 *(uint64_t *)dst = syntax[i].def.u;
1134 *(int64_t *) dst = syntax[i].def.i;
1137 *(double *) dst = syntax[i].def.f;
1141 // the default may be NULL
1142 if (syntax[i].def.s) {
1143 *(char**)dst = av_strdup(syntax[i].def.s);
1145 return AVERROR(ENOMEM);
1151 if (!matroska->levels[matroska->num_levels - 1].length) {
1152 matroska->num_levels--;
1158 res = ebml_parse(matroska, syntax, data);
1161 return res == LEVEL_ENDED ? 0 : res;
1164 static int is_ebml_id_valid(uint32_t id)
1166 // Due to endian nonsense in Matroska, the highest byte with any bits set
1167 // will contain the leading length bit. This bit in turn identifies the
1168 // total byte length of the element by its position within the byte.
1169 unsigned int bits = av_log2(id);
1170 return id && (bits + 7) / 8 == (8 - bits % 8);
1174 * Allocate and return the entry for the level1 element with the given ID. If
1175 * an entry already exists, return the existing entry.
1177 static MatroskaLevel1Element *matroska_find_level1_elem(MatroskaDemuxContext *matroska,
1178 uint32_t id, int64_t pos)
1181 MatroskaLevel1Element *elem;
1183 if (!is_ebml_id_valid(id))
1186 // Some files link to all clusters; useless.
1187 if (id == MATROSKA_ID_CLUSTER)
1190 // There can be multiple SeekHeads and Tags.
1191 for (i = 0; i < matroska->num_level1_elems; i++) {
1192 if (matroska->level1_elems[i].id == id) {
1193 if (matroska->level1_elems[i].pos == pos ||
1194 id != MATROSKA_ID_SEEKHEAD && id != MATROSKA_ID_TAGS)
1195 return &matroska->level1_elems[i];
1199 // Only a completely broken file would have more elements.
1200 if (matroska->num_level1_elems >= FF_ARRAY_ELEMS(matroska->level1_elems)) {
1201 av_log(matroska->ctx, AV_LOG_ERROR, "Too many level1 elements.\n");
1205 elem = &matroska->level1_elems[matroska->num_level1_elems++];
1206 *elem = (MatroskaLevel1Element){.id = id};
1211 static int ebml_parse(MatroskaDemuxContext *matroska,
1212 EbmlSyntax *syntax, void *data)
1214 static const uint64_t max_lengths[EBML_TYPE_COUNT] = {
1215 // Forbid unknown-length EBML_NONE elements.
1216 [EBML_NONE] = EBML_UNKNOWN_LENGTH - 1,
1220 // max. 16 MB for strings
1221 [EBML_STR] = 0x1000000,
1222 [EBML_UTF8] = 0x1000000,
1223 // max. 256 MB for binary data
1224 [EBML_BIN] = 0x10000000,
1225 // no limits for anything else
1227 AVIOContext *pb = matroska->ctx->pb;
1230 int64_t pos = avio_tell(pb), pos_alt;
1231 int res, update_pos = 1, level_check;
1232 MatroskaLevel1Element *level1_elem;
1233 MatroskaLevel *level = matroska->num_levels ? &matroska->levels[matroska->num_levels - 1] : NULL;
1235 if (!matroska->current_id) {
1237 res = ebml_read_num(matroska, pb, 4, &id, 0);
1239 if (pb->eof_reached && res == AVERROR_EOF) {
1240 if (matroska->is_live)
1241 // in live mode, finish parsing if EOF is reached.
1243 if (level && pos == avio_tell(pb)) {
1244 if (level->length == EBML_UNKNOWN_LENGTH) {
1245 // Unknown-length levels automatically end at EOF.
1246 matroska->num_levels--;
1249 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely "
1250 "at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
1256 matroska->current_id = id | 1 << 7 * res;
1257 pos_alt = pos + res;
1260 pos -= (av_log2(matroska->current_id) + 7) / 8;
1263 id = matroska->current_id;
1265 syntax = ebml_parse_id(syntax, id);
1266 if (!syntax->id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
1267 if (level && level->length == EBML_UNKNOWN_LENGTH) {
1268 // Unknown-length levels end when an element from an upper level
1269 // in the hierarchy is encountered.
1270 while (syntax->def.n) {
1271 syntax = ebml_parse_id(syntax->def.n, id);
1273 matroska->num_levels--;
1279 av_log(matroska->ctx, AV_LOG_DEBUG, "Unknown entry 0x%"PRIX32" at pos. "
1280 "%"PRId64"\n", id, pos);
1281 update_pos = 0; /* Don't update resync_pos as an error might have happened. */
1285 data = (char *) data + syntax->data_offset;
1286 if (syntax->list_elem_size) {
1287 EbmlList *list = data;
1290 if ((unsigned)list->nb_elem + 1 >= UINT_MAX / syntax->list_elem_size)
1291 return AVERROR(ENOMEM);
1292 newelem = av_fast_realloc(list->elem,
1293 &list->alloc_elem_size,
1294 (list->nb_elem + 1) * syntax->list_elem_size);
1296 return AVERROR(ENOMEM);
1297 list->elem = newelem;
1298 data = (char *) list->elem + list->nb_elem * syntax->list_elem_size;
1299 memset(data, 0, syntax->list_elem_size);
1304 if (syntax->type != EBML_STOP) {
1305 matroska->current_id = 0;
1306 if ((res = ebml_read_length(matroska, pb, &length)) < 0)
1311 if (matroska->num_levels > 0) {
1312 if (length != EBML_UNKNOWN_LENGTH &&
1313 level->length != EBML_UNKNOWN_LENGTH) {
1314 uint64_t elem_end = pos_alt + length,
1315 level_end = level->start + level->length;
1317 if (elem_end < level_end) {
1319 } else if (elem_end == level_end) {
1320 level_check = LEVEL_ENDED;
1322 av_log(matroska->ctx, AV_LOG_ERROR,
1323 "Element at 0x%"PRIx64" ending at 0x%"PRIx64" exceeds "
1324 "containing master element ending at 0x%"PRIx64"\n",
1325 pos, elem_end, level_end);
1326 return AVERROR_INVALIDDATA;
1328 } else if (length != EBML_UNKNOWN_LENGTH) {
1330 } else if (level->length != EBML_UNKNOWN_LENGTH) {
1331 av_log(matroska->ctx, AV_LOG_ERROR, "Unknown-sized element "
1332 "at 0x%"PRIx64" inside parent with finite size\n", pos);
1333 return AVERROR_INVALIDDATA;
1336 if (id != MATROSKA_ID_CLUSTER && (syntax->type == EBML_LEVEL1
1337 || syntax->type == EBML_NEST)) {
1338 // According to the current specifications only clusters and
1339 // segments are allowed to be unknown-length. We also accept
1340 // other unknown-length master elements.
1341 av_log(matroska->ctx, AV_LOG_WARNING,
1342 "Found unknown-length element 0x%"PRIX32" other than "
1343 "a cluster at 0x%"PRIx64". Spec-incompliant, but "
1344 "parsing will nevertheless be attempted.\n", id, pos);
1351 if (max_lengths[syntax->type] && length > max_lengths[syntax->type]) {
1352 if (length != EBML_UNKNOWN_LENGTH) {
1353 av_log(matroska->ctx, AV_LOG_ERROR,
1354 "Invalid length 0x%"PRIx64" > 0x%"PRIx64" for element "
1355 "with ID 0x%"PRIX32" at 0x%"PRIx64"\n",
1356 length, max_lengths[syntax->type], id, pos);
1357 } else if (syntax->type != EBML_NONE) {
1358 av_log(matroska->ctx, AV_LOG_ERROR,
1359 "Element with ID 0x%"PRIX32" at pos. 0x%"PRIx64" has "
1360 "unknown length, yet the length of an element of its "
1361 "type must be known.\n", id, pos);
1363 av_log(matroska->ctx, AV_LOG_ERROR,
1364 "Found unknown-length element with ID 0x%"PRIX32" at "
1365 "pos. 0x%"PRIx64" for which no syntax for parsing is "
1366 "available.\n", id, pos);
1368 return AVERROR_INVALIDDATA;
1371 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1372 // Loosing sync will likely manifest itself as encountering unknown
1373 // elements which are not reliably distinguishable from elements
1374 // belonging to future extensions of the format.
1375 // We use a heuristic to detect such situations: If the current
1376 // element is not expected at the current syntax level and there
1377 // were only a few unknown elements in a row, then the element is
1378 // skipped or considered defective based upon the length of the
1379 // current element (i.e. how much would be skipped); if there were
1380 // more than a few skipped elements in a row and skipping the current
1381 // element would lead us more than SKIP_THRESHOLD away from the last
1382 // known good position, then it is inferred that an error occurred.
1383 // The dependency on the number of unknown elements in a row exists
1384 // because the distance to the last known good position is
1385 // automatically big if the last parsed element was big.
1386 // In both cases, each unknown element is considered equivalent to
1387 // UNKNOWN_EQUIV of skipped bytes for the check.
1388 // The whole check is only done for non-seekable output, because
1389 // in this situation skipped data can't simply be rechecked later.
1390 // This is especially important when using unkown length elements
1391 // as the check for whether a child exceeds its containing master
1392 // element is not effective in this situation.
1394 matroska->unknown_count = 0;
1396 int64_t dist = length + UNKNOWN_EQUIV * matroska->unknown_count++;
1398 if (matroska->unknown_count > 3)
1399 dist += pos_alt - matroska->resync_pos;
1401 if (dist > SKIP_THRESHOLD) {
1402 av_log(matroska->ctx, AV_LOG_ERROR,
1403 "Unknown element %"PRIX32" at pos. 0x%"PRIx64" with "
1404 "length 0x%"PRIx64" considered as invalid data. Last "
1405 "known good position 0x%"PRIx64", %d unknown elements"
1406 " in a row\n", id, pos, length, matroska->resync_pos,
1407 matroska->unknown_count);
1408 return AVERROR_INVALIDDATA;
1413 if (update_pos > 0) {
1414 // We have found an element that is allowed at this place
1415 // in the hierarchy and it passed all checks, so treat the beginning
1416 // of the element as the "last known good" position.
1417 matroska->resync_pos = pos;
1420 if (!data && length != EBML_UNKNOWN_LENGTH)
1424 switch (syntax->type) {
1426 res = ebml_read_uint(pb, length, syntax->def.u, data);
1429 res = ebml_read_sint(pb, length, syntax->def.i, data);
1432 res = ebml_read_float(pb, length, syntax->def.f, data);
1436 res = ebml_read_ascii(pb, length, syntax->def.s, data);
1439 res = ebml_read_binary(pb, length, pos_alt, data);
1443 if ((res = ebml_read_master(matroska, length, pos_alt)) < 0)
1445 if (id == MATROSKA_ID_SEGMENT)
1446 matroska->segment_start = pos_alt;
1447 if (id == MATROSKA_ID_CUES)
1448 matroska->cues_parsing_deferred = 0;
1449 if (syntax->type == EBML_LEVEL1 &&
1450 (level1_elem = matroska_find_level1_elem(matroska, syntax->id, pos))) {
1451 if (!level1_elem->pos) {
1452 // Zero is not a valid position for a level 1 element.
1453 level1_elem->pos = pos;
1454 } else if (level1_elem->pos != pos)
1455 av_log(matroska->ctx, AV_LOG_ERROR, "Duplicate element\n");
1456 level1_elem->parsed = 1;
1458 if (res = ebml_parse_nest(matroska, syntax->def.n, data))
1467 if (ffio_limit(pb, length) != length) {
1468 // ffio_limit emits its own error message,
1469 // so we don't have to.
1470 return AVERROR(EIO);
1472 if ((res2 = avio_skip(pb, length - 1)) >= 0) {
1473 // avio_skip might take us past EOF. We check for this
1474 // by skipping only length - 1 bytes, reading a byte and
1475 // checking the error flags. This is done in order to check
1476 // that the element has been properly skipped even when
1477 // no filesize (that ffio_limit relies on) is available.
1479 res = NEEDS_CHECKING;
1486 if (res == NEEDS_CHECKING) {
1487 if (pb->eof_reached) {
1496 if (res == AVERROR_INVALIDDATA)
1497 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
1498 else if (res == AVERROR(EIO))
1499 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
1500 else if (res == AVERROR_EOF) {
1501 av_log(matroska->ctx, AV_LOG_ERROR, "File ended prematurely\n");
1509 if (syntax->is_counted && data) {
1510 CountedElement *elem = data;
1511 if (elem->count != UINT_MAX)
1515 if (level_check == LEVEL_ENDED && matroska->num_levels) {
1516 level = &matroska->levels[matroska->num_levels - 1];
1517 pos = avio_tell(pb);
1519 // Given that pos >= level->start no check for
1520 // level->length != EBML_UNKNOWN_LENGTH is necessary.
1521 while (matroska->num_levels && pos == level->start + level->length) {
1522 matroska->num_levels--;
1530 static void ebml_free(EbmlSyntax *syntax, void *data)
1533 for (i = 0; syntax[i].id; i++) {
1534 void *data_off = (char *) data + syntax[i].data_offset;
1535 switch (syntax[i].type) {
1541 av_buffer_unref(&((EbmlBin *) data_off)->buf);
1545 if (syntax[i].list_elem_size) {
1546 EbmlList *list = data_off;
1547 char *ptr = list->elem;
1548 for (j = 0; j < list->nb_elem;
1549 j++, ptr += syntax[i].list_elem_size)
1550 ebml_free(syntax[i].def.n, ptr);
1551 av_freep(&list->elem);
1553 list->alloc_elem_size = 0;
1555 ebml_free(syntax[i].def.n, data_off);
1565 static int matroska_probe(const AVProbeData *p)
1568 int len_mask = 0x80, size = 1, n = 1, i;
1571 if (AV_RB32(p->buf) != EBML_ID_HEADER)
1574 /* length of header */
1576 while (size <= 8 && !(total & len_mask)) {
1582 total &= (len_mask - 1);
1584 total = (total << 8) | p->buf[4 + n++];
1586 if (total + 1 == 1ULL << (7 * size)){
1587 /* Unknown-length header - simply parse the whole buffer. */
1588 total = p->buf_size - 4 - size;
1590 /* Does the probe data contain the whole header? */
1591 if (p->buf_size < 4 + size + total)
1595 /* The header should contain a known document type. For now,
1596 * we don't parse the whole header but simply check for the
1597 * availability of that array of characters inside the header.
1598 * Not fully fool-proof, but good enough. */
1599 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
1600 size_t probelen = strlen(matroska_doctypes[i]);
1601 if (total < probelen)
1603 for (n = 4 + size; n <= 4 + size + total - probelen; n++)
1604 if (!memcmp(p->buf + n, matroska_doctypes[i], probelen))
1605 return AVPROBE_SCORE_MAX;
1608 // probably valid EBML header but no recognized doctype
1609 return AVPROBE_SCORE_EXTENSION;
1612 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
1615 MatroskaTrack *tracks = matroska->tracks.elem;
1618 for (i = 0; i < matroska->tracks.nb_elem; i++)
1619 if (tracks[i].num == num)
1622 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %"PRIu64"\n", num);
1626 static int matroska_decode_buffer(uint8_t **buf, int *buf_size,
1627 MatroskaTrack *track)
1629 MatroskaTrackEncoding *encodings = track->encodings.elem;
1630 uint8_t *data = *buf;
1631 int isize = *buf_size;
1632 uint8_t *pkt_data = NULL;
1633 uint8_t av_unused *newpktdata;
1634 int pkt_size = isize;
1638 if (pkt_size >= 10000000U)
1639 return AVERROR_INVALIDDATA;
1641 switch (encodings[0].compression.algo) {
1642 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
1644 int header_size = encodings[0].compression.settings.size;
1645 uint8_t *header = encodings[0].compression.settings.data;
1647 if (header_size && !header) {
1648 av_log(NULL, AV_LOG_ERROR, "Compression size but no data in headerstrip\n");
1655 pkt_size = isize + header_size;
1656 pkt_data = av_malloc(pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1658 return AVERROR(ENOMEM);
1660 memcpy(pkt_data, header, header_size);
1661 memcpy(pkt_data + header_size, data, isize);
1665 case MATROSKA_TRACK_ENCODING_COMP_LZO:
1668 olen = pkt_size *= 3;
1669 newpktdata = av_realloc(pkt_data, pkt_size + AV_LZO_OUTPUT_PADDING
1670 + AV_INPUT_BUFFER_PADDING_SIZE);
1672 result = AVERROR(ENOMEM);
1675 pkt_data = newpktdata;
1676 result = av_lzo1x_decode(pkt_data, &olen, data, &insize);
1677 } while (result == AV_LZO_OUTPUT_FULL && pkt_size < 10000000);
1679 result = AVERROR_INVALIDDATA;
1686 case MATROSKA_TRACK_ENCODING_COMP_ZLIB:
1688 z_stream zstream = { 0 };
1689 if (inflateInit(&zstream) != Z_OK)
1691 zstream.next_in = data;
1692 zstream.avail_in = isize;
1695 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1697 inflateEnd(&zstream);
1698 result = AVERROR(ENOMEM);
1701 pkt_data = newpktdata;
1702 zstream.avail_out = pkt_size - zstream.total_out;
1703 zstream.next_out = pkt_data + zstream.total_out;
1704 result = inflate(&zstream, Z_NO_FLUSH);
1705 } while (result == Z_OK && pkt_size < 10000000);
1706 pkt_size = zstream.total_out;
1707 inflateEnd(&zstream);
1708 if (result != Z_STREAM_END) {
1709 if (result == Z_MEM_ERROR)
1710 result = AVERROR(ENOMEM);
1712 result = AVERROR_INVALIDDATA;
1719 case MATROSKA_TRACK_ENCODING_COMP_BZLIB:
1721 bz_stream bzstream = { 0 };
1722 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1724 bzstream.next_in = data;
1725 bzstream.avail_in = isize;
1728 newpktdata = av_realloc(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE);
1730 BZ2_bzDecompressEnd(&bzstream);
1731 result = AVERROR(ENOMEM);
1734 pkt_data = newpktdata;
1735 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1736 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1737 result = BZ2_bzDecompress(&bzstream);
1738 } while (result == BZ_OK && pkt_size < 10000000);
1739 pkt_size = bzstream.total_out_lo32;
1740 BZ2_bzDecompressEnd(&bzstream);
1741 if (result != BZ_STREAM_END) {
1742 if (result == BZ_MEM_ERROR)
1743 result = AVERROR(ENOMEM);
1745 result = AVERROR_INVALIDDATA;
1752 return AVERROR_INVALIDDATA;
1755 memset(pkt_data + pkt_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1758 *buf_size = pkt_size;
1766 static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
1767 AVDictionary **metadata, char *prefix)
1769 MatroskaTag *tags = list->elem;
1773 for (i = 0; i < list->nb_elem; i++) {
1774 const char *lang = tags[i].lang &&
1775 strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
1777 if (!tags[i].name) {
1778 av_log(s, AV_LOG_WARNING, "Skipping invalid tag with no TagName.\n");
1782 snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
1784 av_strlcpy(key, tags[i].name, sizeof(key));
1785 if (tags[i].def || !lang) {
1786 av_dict_set(metadata, key, tags[i].string, 0);
1787 if (tags[i].sub.nb_elem)
1788 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1791 av_strlcat(key, "-", sizeof(key));
1792 av_strlcat(key, lang, sizeof(key));
1793 av_dict_set(metadata, key, tags[i].string, 0);
1794 if (tags[i].sub.nb_elem)
1795 matroska_convert_tag(s, &tags[i].sub, metadata, key);
1798 ff_metadata_conv(metadata, NULL, ff_mkv_metadata_conv);
1801 static void matroska_convert_tags(AVFormatContext *s)
1803 MatroskaDemuxContext *matroska = s->priv_data;
1804 MatroskaTags *tags = matroska->tags.elem;
1807 for (i = 0; i < matroska->tags.nb_elem; i++) {
1808 if (tags[i].target.attachuid) {
1809 MatroskaAttachment *attachment = matroska->attachments.elem;
1811 for (j = 0; j < matroska->attachments.nb_elem; j++) {
1812 if (attachment[j].uid == tags[i].target.attachuid &&
1813 attachment[j].stream) {
1814 matroska_convert_tag(s, &tags[i].tag,
1815 &attachment[j].stream->metadata, NULL);
1820 av_log(s, AV_LOG_WARNING,
1821 "The tags at index %d refer to a "
1822 "non-existent attachment %"PRId64".\n",
1823 i, tags[i].target.attachuid);
1825 } else if (tags[i].target.chapteruid) {
1826 MatroskaChapter *chapter = matroska->chapters.elem;
1828 for (j = 0; j < matroska->chapters.nb_elem; j++) {
1829 if (chapter[j].uid == tags[i].target.chapteruid &&
1830 chapter[j].chapter) {
1831 matroska_convert_tag(s, &tags[i].tag,
1832 &chapter[j].chapter->metadata, NULL);
1837 av_log(s, AV_LOG_WARNING,
1838 "The tags at index %d refer to a non-existent chapter "
1840 i, tags[i].target.chapteruid);
1842 } else if (tags[i].target.trackuid) {
1843 MatroskaTrack *track = matroska->tracks.elem;
1845 for (j = 0; j < matroska->tracks.nb_elem; j++) {
1846 if (track[j].uid == tags[i].target.trackuid &&
1848 matroska_convert_tag(s, &tags[i].tag,
1849 &track[j].stream->metadata, NULL);
1854 av_log(s, AV_LOG_WARNING,
1855 "The tags at index %d refer to a non-existent track "
1857 i, tags[i].target.trackuid);
1860 matroska_convert_tag(s, &tags[i].tag, &s->metadata,
1861 tags[i].target.type);
1866 static int matroska_parse_seekhead_entry(MatroskaDemuxContext *matroska,
1869 uint32_t saved_id = matroska->current_id;
1870 int64_t before_pos = avio_tell(matroska->ctx->pb);
1874 if (avio_seek(matroska->ctx->pb, pos, SEEK_SET) == pos) {
1875 /* We don't want to lose our seekhead level, so we add
1876 * a dummy. This is a crude hack. */
1877 if (matroska->num_levels == EBML_MAX_DEPTH) {
1878 av_log(matroska->ctx, AV_LOG_INFO,
1879 "Max EBML element depth (%d) reached, "
1880 "cannot parse further.\n", EBML_MAX_DEPTH);
1881 ret = AVERROR_INVALIDDATA;
1883 matroska->levels[matroska->num_levels] = (MatroskaLevel) { 0, EBML_UNKNOWN_LENGTH };
1884 matroska->num_levels++;
1885 matroska->current_id = 0;
1887 ret = ebml_parse(matroska, matroska_segment, matroska);
1888 if (ret == LEVEL_ENDED) {
1889 /* This can only happen if the seek brought us beyond EOF. */
1894 /* Seek back - notice that in all instances where this is used
1895 * it is safe to set the level to 1. */
1896 matroska_reset_status(matroska, saved_id, before_pos);
1901 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1903 EbmlList *seekhead_list = &matroska->seekhead;
1906 // we should not do any seeking in the streaming case
1907 if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
1910 for (i = 0; i < seekhead_list->nb_elem; i++) {
1911 MatroskaSeekhead *seekheads = seekhead_list->elem;
1912 uint32_t id = seekheads[i].id;
1913 int64_t pos = seekheads[i].pos + matroska->segment_start;
1914 MatroskaLevel1Element *elem;
1916 if (id != seekheads[i].id || pos < matroska->segment_start)
1919 elem = matroska_find_level1_elem(matroska, id, pos);
1920 if (!elem || elem->parsed)
1925 // defer cues parsing until we actually need cue data.
1926 if (id == MATROSKA_ID_CUES)
1929 if (matroska_parse_seekhead_entry(matroska, pos) < 0) {
1930 // mark index as broken
1931 matroska->cues_parsing_deferred = -1;
1939 static void matroska_add_index_entries(MatroskaDemuxContext *matroska)
1941 EbmlList *index_list;
1942 MatroskaIndex *index;
1943 uint64_t index_scale = 1;
1946 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1949 index_list = &matroska->index;
1950 index = index_list->elem;
1951 if (index_list->nb_elem < 2)
1953 if (index[1].time > 1E14 / matroska->time_scale) {
1954 av_log(matroska->ctx, AV_LOG_WARNING, "Dropping apparently-broken index.\n");
1957 for (i = 0; i < index_list->nb_elem; i++) {
1958 EbmlList *pos_list = &index[i].pos;
1959 MatroskaIndexPos *pos = pos_list->elem;
1960 for (j = 0; j < pos_list->nb_elem; j++) {
1961 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1963 if (track && track->stream)
1964 av_add_index_entry(track->stream,
1965 pos[j].pos + matroska->segment_start,
1966 index[i].time / index_scale, 0, 0,
1972 static void matroska_parse_cues(MatroskaDemuxContext *matroska) {
1975 if (matroska->ctx->flags & AVFMT_FLAG_IGNIDX)
1978 for (i = 0; i < matroska->num_level1_elems; i++) {
1979 MatroskaLevel1Element *elem = &matroska->level1_elems[i];
1980 if (elem->id == MATROSKA_ID_CUES && !elem->parsed) {
1981 if (matroska_parse_seekhead_entry(matroska, elem->pos) < 0)
1982 matroska->cues_parsing_deferred = -1;
1988 matroska_add_index_entries(matroska);
1991 static int matroska_aac_profile(char *codec_id)
1993 static const char *const aac_profiles[] = { "MAIN", "LC", "SSR" };
1996 for (profile = 0; profile < FF_ARRAY_ELEMS(aac_profiles); profile++)
1997 if (strstr(codec_id, aac_profiles[profile]))
2002 static int matroska_aac_sri(int samplerate)
2006 for (sri = 0; sri < FF_ARRAY_ELEMS(avpriv_mpeg4audio_sample_rates); sri++)
2007 if (avpriv_mpeg4audio_sample_rates[sri] == samplerate)
2012 static void matroska_metadata_creation_time(AVDictionary **metadata, int64_t date_utc)
2014 /* Convert to seconds and adjust by number of seconds between 2001-01-01 and Epoch */
2015 avpriv_dict_set_timestamp(metadata, "creation_time", date_utc / 1000 + 978307200000000LL);
2018 static int matroska_parse_flac(AVFormatContext *s,
2019 MatroskaTrack *track,
2022 AVStream *st = track->stream;
2023 uint8_t *p = track->codec_priv.data;
2024 int size = track->codec_priv.size;
2026 if (size < 8 + FLAC_STREAMINFO_SIZE || p[4] & 0x7f) {
2027 av_log(s, AV_LOG_WARNING, "Invalid FLAC private data\n");
2028 track->codec_priv.size = 0;
2032 track->codec_priv.size = 8 + FLAC_STREAMINFO_SIZE;
2034 p += track->codec_priv.size;
2035 size -= track->codec_priv.size;
2037 /* parse the remaining metadata blocks if present */
2039 int block_last, block_type, block_size;
2041 flac_parse_block_header(p, &block_last, &block_type, &block_size);
2045 if (block_size > size)
2048 /* check for the channel mask */
2049 if (block_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
2050 AVDictionary *dict = NULL;
2051 AVDictionaryEntry *chmask;
2053 ff_vorbis_comment(s, &dict, p, block_size, 0);
2054 chmask = av_dict_get(dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
2056 uint64_t mask = strtol(chmask->value, NULL, 0);
2057 if (!mask || mask & ~0x3ffffULL) {
2058 av_log(s, AV_LOG_WARNING,
2059 "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
2061 st->codecpar->channel_layout = mask;
2063 av_dict_free(&dict);
2073 static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
2075 int minor, micro, bttb = 0;
2077 /* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
2078 * this function, and fixed in 57.52 */
2079 if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf57.%d.%d", &minor, µ) == 2)
2080 bttb = (minor >= 36 && minor <= 51 && micro >= 100);
2082 switch (field_order) {
2083 case MATROSKA_VIDEO_FIELDORDER_PROGRESSIVE:
2084 return AV_FIELD_PROGRESSIVE;
2085 case MATROSKA_VIDEO_FIELDORDER_UNDETERMINED:
2086 return AV_FIELD_UNKNOWN;
2087 case MATROSKA_VIDEO_FIELDORDER_TT:
2089 case MATROSKA_VIDEO_FIELDORDER_BB:
2091 case MATROSKA_VIDEO_FIELDORDER_BT:
2092 return bttb ? AV_FIELD_TB : AV_FIELD_BT;
2093 case MATROSKA_VIDEO_FIELDORDER_TB:
2094 return bttb ? AV_FIELD_BT : AV_FIELD_TB;
2096 return AV_FIELD_UNKNOWN;
2100 static void mkv_stereo_mode_display_mul(int stereo_mode,
2101 int *h_width, int *h_height)
2103 switch (stereo_mode) {
2104 case MATROSKA_VIDEO_STEREOMODE_TYPE_MONO:
2105 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_RL:
2106 case MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR:
2107 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL:
2108 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR:
2110 case MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT:
2111 case MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT:
2112 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_RL:
2113 case MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR:
2116 case MATROSKA_VIDEO_STEREOMODE_TYPE_BOTTOM_TOP:
2117 case MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM:
2118 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_RL:
2119 case MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR:
2125 static int mkv_parse_video_color(AVStream *st, const MatroskaTrack *track) {
2126 const MatroskaTrackVideoColor *color = track->video.color.elem;
2127 const MatroskaMasteringMeta *mastering_meta;
2128 int has_mastering_primaries, has_mastering_luminance;
2130 if (!track->video.color.nb_elem)
2133 mastering_meta = &color->mastering_meta;
2134 // Mastering primaries are CIE 1931 coords, and must be > 0.
2135 has_mastering_primaries =
2136 mastering_meta->r_x > 0 && mastering_meta->r_y > 0 &&
2137 mastering_meta->g_x > 0 && mastering_meta->g_y > 0 &&
2138 mastering_meta->b_x > 0 && mastering_meta->b_y > 0 &&
2139 mastering_meta->white_x > 0 && mastering_meta->white_y > 0;
2140 has_mastering_luminance = mastering_meta->max_luminance >
2141 mastering_meta->min_luminance.el.f &&
2142 mastering_meta->min_luminance.el.f >= 0 &&
2143 mastering_meta->min_luminance.count;
2145 if (color->matrix_coefficients != AVCOL_SPC_RESERVED)
2146 st->codecpar->color_space = color->matrix_coefficients;
2147 if (color->primaries != AVCOL_PRI_RESERVED &&
2148 color->primaries != AVCOL_PRI_RESERVED0)
2149 st->codecpar->color_primaries = color->primaries;
2150 if (color->transfer_characteristics != AVCOL_TRC_RESERVED &&
2151 color->transfer_characteristics != AVCOL_TRC_RESERVED0)
2152 st->codecpar->color_trc = color->transfer_characteristics;
2153 if (color->range != AVCOL_RANGE_UNSPECIFIED &&
2154 color->range <= AVCOL_RANGE_JPEG)
2155 st->codecpar->color_range = color->range;
2156 if (color->chroma_siting_horz != MATROSKA_COLOUR_CHROMASITINGHORZ_UNDETERMINED &&
2157 color->chroma_siting_vert != MATROSKA_COLOUR_CHROMASITINGVERT_UNDETERMINED &&
2158 color->chroma_siting_horz < MATROSKA_COLOUR_CHROMASITINGHORZ_NB &&
2159 color->chroma_siting_vert < MATROSKA_COLOUR_CHROMASITINGVERT_NB) {
2160 st->codecpar->chroma_location =
2161 avcodec_chroma_pos_to_enum((color->chroma_siting_horz - 1) << 7,
2162 (color->chroma_siting_vert - 1) << 7);
2164 if (color->max_cll && color->max_fall) {
2167 AVContentLightMetadata *metadata = av_content_light_metadata_alloc(&size);
2169 return AVERROR(ENOMEM);
2170 ret = av_stream_add_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
2171 (uint8_t *)metadata, size);
2173 av_freep(&metadata);
2176 metadata->MaxCLL = color->max_cll;
2177 metadata->MaxFALL = color->max_fall;
2180 if (has_mastering_primaries || has_mastering_luminance) {
2181 AVMasteringDisplayMetadata *metadata =
2182 (AVMasteringDisplayMetadata*) av_stream_new_side_data(
2183 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
2184 sizeof(AVMasteringDisplayMetadata));
2186 return AVERROR(ENOMEM);
2188 memset(metadata, 0, sizeof(AVMasteringDisplayMetadata));
2189 if (has_mastering_primaries) {
2190 metadata->display_primaries[0][0] = av_d2q(mastering_meta->r_x, INT_MAX);
2191 metadata->display_primaries[0][1] = av_d2q(mastering_meta->r_y, INT_MAX);
2192 metadata->display_primaries[1][0] = av_d2q(mastering_meta->g_x, INT_MAX);
2193 metadata->display_primaries[1][1] = av_d2q(mastering_meta->g_y, INT_MAX);
2194 metadata->display_primaries[2][0] = av_d2q(mastering_meta->b_x, INT_MAX);
2195 metadata->display_primaries[2][1] = av_d2q(mastering_meta->b_y, INT_MAX);
2196 metadata->white_point[0] = av_d2q(mastering_meta->white_x, INT_MAX);
2197 metadata->white_point[1] = av_d2q(mastering_meta->white_y, INT_MAX);
2198 metadata->has_primaries = 1;
2200 if (has_mastering_luminance) {
2201 metadata->max_luminance = av_d2q(mastering_meta->max_luminance, INT_MAX);
2202 metadata->min_luminance = av_d2q(mastering_meta->min_luminance.el.f, INT_MAX);
2203 metadata->has_luminance = 1;
2209 static int mkv_parse_video_projection(AVStream *st, const MatroskaTrack *track,
2212 AVSphericalMapping *spherical;
2213 const MatroskaTrackVideoProjection *mkv_projection = &track->video.projection;
2214 const uint8_t *priv_data = mkv_projection->private.data;
2215 enum AVSphericalProjection projection;
2216 size_t spherical_size;
2217 uint32_t l = 0, t = 0, r = 0, b = 0;
2218 uint32_t padding = 0;
2221 if (mkv_projection->private.size && priv_data[0] != 0) {
2222 av_log(logctx, AV_LOG_WARNING, "Unknown spherical metadata\n");
2226 switch (track->video.projection.type) {
2227 case MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR:
2228 if (track->video.projection.private.size == 20) {
2229 t = AV_RB32(priv_data + 4);
2230 b = AV_RB32(priv_data + 8);
2231 l = AV_RB32(priv_data + 12);
2232 r = AV_RB32(priv_data + 16);
2234 if (b >= UINT_MAX - t || r >= UINT_MAX - l) {
2235 av_log(logctx, AV_LOG_ERROR,
2236 "Invalid bounding rectangle coordinates "
2237 "%"PRIu32",%"PRIu32",%"PRIu32",%"PRIu32"\n",
2239 return AVERROR_INVALIDDATA;
2241 } else if (track->video.projection.private.size != 0) {
2242 av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2243 return AVERROR_INVALIDDATA;
2246 if (l || t || r || b)
2247 projection = AV_SPHERICAL_EQUIRECTANGULAR_TILE;
2249 projection = AV_SPHERICAL_EQUIRECTANGULAR;
2251 case MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP:
2252 if (track->video.projection.private.size < 4) {
2253 av_log(logctx, AV_LOG_ERROR, "Missing projection private properties\n");
2254 return AVERROR_INVALIDDATA;
2255 } else if (track->video.projection.private.size == 12) {
2256 uint32_t layout = AV_RB32(priv_data + 4);
2258 av_log(logctx, AV_LOG_WARNING,
2259 "Unknown spherical cubemap layout %"PRIu32"\n", layout);
2262 projection = AV_SPHERICAL_CUBEMAP;
2263 padding = AV_RB32(priv_data + 8);
2265 av_log(logctx, AV_LOG_ERROR, "Unknown spherical metadata\n");
2266 return AVERROR_INVALIDDATA;
2269 case MATROSKA_VIDEO_PROJECTION_TYPE_RECTANGULAR:
2270 /* No Spherical metadata */
2273 av_log(logctx, AV_LOG_WARNING,
2274 "Unknown spherical metadata type %"PRIu64"\n",
2275 track->video.projection.type);
2279 spherical = av_spherical_alloc(&spherical_size);
2281 return AVERROR(ENOMEM);
2283 spherical->projection = projection;
2285 spherical->yaw = (int32_t) (track->video.projection.yaw * (1 << 16));
2286 spherical->pitch = (int32_t) (track->video.projection.pitch * (1 << 16));
2287 spherical->roll = (int32_t) (track->video.projection.roll * (1 << 16));
2289 spherical->padding = padding;
2291 spherical->bound_left = l;
2292 spherical->bound_top = t;
2293 spherical->bound_right = r;
2294 spherical->bound_bottom = b;
2296 ret = av_stream_add_side_data(st, AV_PKT_DATA_SPHERICAL, (uint8_t *)spherical,
2299 av_freep(&spherical);
2306 static int get_qt_codec(MatroskaTrack *track, uint32_t *fourcc, enum AVCodecID *codec_id)
2308 const AVCodecTag *codec_tags;
2310 codec_tags = track->type == MATROSKA_TRACK_TYPE_VIDEO ?
2311 ff_codec_movvideo_tags : ff_codec_movaudio_tags;
2313 /* Normalize noncompliant private data that starts with the fourcc
2314 * by expanding/shifting the data by 4 bytes and storing the data
2315 * size at the start. */
2316 if (ff_codec_get_id(codec_tags, AV_RL32(track->codec_priv.data))) {
2317 int ret = av_buffer_realloc(&track->codec_priv.buf,
2318 track->codec_priv.size + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
2322 track->codec_priv.data = track->codec_priv.buf->data;
2323 memmove(track->codec_priv.data + 4, track->codec_priv.data, track->codec_priv.size);
2324 track->codec_priv.size += 4;
2325 AV_WB32(track->codec_priv.data, track->codec_priv.size);
2328 *fourcc = AV_RL32(track->codec_priv.data + 4);
2329 *codec_id = ff_codec_get_id(codec_tags, *fourcc);
2334 static int matroska_parse_tracks(AVFormatContext *s)
2336 MatroskaDemuxContext *matroska = s->priv_data;
2337 MatroskaTrack *tracks = matroska->tracks.elem;
2342 for (i = 0; i < matroska->tracks.nb_elem; i++) {
2343 MatroskaTrack *track = &tracks[i];
2344 enum AVCodecID codec_id = AV_CODEC_ID_NONE;
2345 EbmlList *encodings_list = &track->encodings;
2346 MatroskaTrackEncoding *encodings = encodings_list->elem;
2347 uint8_t *extradata = NULL;
2348 int extradata_size = 0;
2349 int extradata_offset = 0;
2350 uint32_t fourcc = 0;
2352 char* key_id_base64 = NULL;
2355 /* Apply some sanity checks. */
2356 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
2357 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
2358 track->type != MATROSKA_TRACK_TYPE_SUBTITLE &&
2359 track->type != MATROSKA_TRACK_TYPE_METADATA) {
2360 av_log(matroska->ctx, AV_LOG_INFO,
2361 "Unknown or unsupported track type %"PRIu64"\n",
2365 if (!track->codec_id)
2368 if ( track->type == MATROSKA_TRACK_TYPE_AUDIO && track->codec_id[0] != 'A'
2369 || track->type == MATROSKA_TRACK_TYPE_VIDEO && track->codec_id[0] != 'V'
2370 || track->type == MATROSKA_TRACK_TYPE_SUBTITLE && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
2371 || track->type == MATROSKA_TRACK_TYPE_METADATA && track->codec_id[0] != 'D' && track->codec_id[0] != 'S'
2373 av_log(matroska->ctx, AV_LOG_INFO, "Inconsistent track type\n");
2377 if (track->audio.samplerate < 0 || track->audio.samplerate > INT_MAX ||
2378 isnan(track->audio.samplerate)) {
2379 av_log(matroska->ctx, AV_LOG_WARNING,
2380 "Invalid sample rate %f, defaulting to 8000 instead.\n",
2381 track->audio.samplerate);
2382 track->audio.samplerate = 8000;
2385 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2386 if (!track->default_duration && track->video.frame_rate > 0) {
2387 double default_duration = 1000000000 / track->video.frame_rate;
2388 if (default_duration > UINT64_MAX || default_duration < 0) {
2389 av_log(matroska->ctx, AV_LOG_WARNING,
2390 "Invalid frame rate %e. Cannot calculate default duration.\n",
2391 track->video.frame_rate);
2393 track->default_duration = default_duration;
2396 if (track->video.display_width == -1)
2397 track->video.display_width = track->video.pixel_width;
2398 if (track->video.display_height == -1)
2399 track->video.display_height = track->video.pixel_height;
2400 if (track->video.color_space.size == 4)
2401 fourcc = AV_RL32(track->video.color_space.data);
2402 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2403 if (!track->audio.out_samplerate)
2404 track->audio.out_samplerate = track->audio.samplerate;
2406 if (encodings_list->nb_elem > 1) {
2407 av_log(matroska->ctx, AV_LOG_ERROR,
2408 "Multiple combined encodings not supported");
2409 } else if (encodings_list->nb_elem == 1) {
2410 if (encodings[0].type) {
2411 if (encodings[0].encryption.key_id.size > 0) {
2412 /* Save the encryption key id to be stored later as a
2414 const int b64_size = AV_BASE64_SIZE(encodings[0].encryption.key_id.size);
2415 key_id_base64 = av_malloc(b64_size);
2416 if (key_id_base64 == NULL)
2417 return AVERROR(ENOMEM);
2419 av_base64_encode(key_id_base64, b64_size,
2420 encodings[0].encryption.key_id.data,
2421 encodings[0].encryption.key_id.size);
2423 encodings[0].scope = 0;
2424 av_log(matroska->ctx, AV_LOG_ERROR,
2425 "Unsupported encoding type");
2429 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
2432 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
2435 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO &&
2437 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP) {
2438 encodings[0].scope = 0;
2439 av_log(matroska->ctx, AV_LOG_ERROR,
2440 "Unsupported encoding type");
2441 } else if (track->codec_priv.size && encodings[0].scope & 2) {
2442 uint8_t *codec_priv = track->codec_priv.data;
2443 int ret = matroska_decode_buffer(&track->codec_priv.data,
2444 &track->codec_priv.size,
2447 track->codec_priv.data = NULL;
2448 track->codec_priv.size = 0;
2449 av_log(matroska->ctx, AV_LOG_ERROR,
2450 "Failed to decode codec private data\n");
2453 if (codec_priv != track->codec_priv.data) {
2454 av_buffer_unref(&track->codec_priv.buf);
2455 if (track->codec_priv.data) {
2456 track->codec_priv.buf = av_buffer_create(track->codec_priv.data,
2457 track->codec_priv.size + AV_INPUT_BUFFER_PADDING_SIZE,
2459 if (!track->codec_priv.buf) {
2460 av_freep(&track->codec_priv.data);
2461 track->codec_priv.size = 0;
2462 return AVERROR(ENOMEM);
2468 track->needs_decoding = encodings && !encodings[0].type &&
2469 encodings[0].scope & 1 &&
2470 (encodings[0].compression.algo !=
2471 MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP ||
2472 encodings[0].compression.settings.size);
2474 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
2475 if (av_strstart(track->codec_id, ff_mkv_codec_tags[j].str, NULL)) {
2476 codec_id = ff_mkv_codec_tags[j].id;
2481 st = track->stream = avformat_new_stream(s, NULL);
2483 av_free(key_id_base64);
2484 return AVERROR(ENOMEM);
2487 if (key_id_base64) {
2488 /* export encryption key id as base64 metadata tag */
2489 av_dict_set(&st->metadata, "enc_key_id", key_id_base64,
2490 AV_DICT_DONT_STRDUP_VAL);
2493 if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC") &&
2494 track->codec_priv.size >= 40 &&
2495 track->codec_priv.data) {
2496 track->ms_compat = 1;
2497 bit_depth = AV_RL16(track->codec_priv.data + 14);
2498 fourcc = AV_RL32(track->codec_priv.data + 16);
2499 codec_id = ff_codec_get_id(ff_codec_bmp_tags,
2502 codec_id = ff_codec_get_id(ff_codec_movvideo_tags,
2504 extradata_offset = 40;
2505 } else if (!strcmp(track->codec_id, "A_MS/ACM") &&
2506 track->codec_priv.size >= 14 &&
2507 track->codec_priv.data) {
2509 ffio_init_context(&b, track->codec_priv.data,
2510 track->codec_priv.size,
2511 0, NULL, NULL, NULL, NULL);
2512 ret = ff_get_wav_header(s, &b, st->codecpar, track->codec_priv.size, 0);
2515 codec_id = st->codecpar->codec_id;
2516 fourcc = st->codecpar->codec_tag;
2517 extradata_offset = FFMIN(track->codec_priv.size, 18);
2518 } else if (!strcmp(track->codec_id, "A_QUICKTIME")
2519 /* Normally 36, but allow noncompliant private data */
2520 && (track->codec_priv.size >= 32)
2521 && (track->codec_priv.data)) {
2522 uint16_t sample_size;
2523 int ret = get_qt_codec(track, &fourcc, &codec_id);
2526 sample_size = AV_RB16(track->codec_priv.data + 26);
2528 if (sample_size == 8) {
2529 fourcc = MKTAG('r','a','w',' ');
2530 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2531 } else if (sample_size == 16) {
2532 fourcc = MKTAG('t','w','o','s');
2533 codec_id = ff_codec_get_id(ff_codec_movaudio_tags, fourcc);
2536 if ((fourcc == MKTAG('t','w','o','s') ||
2537 fourcc == MKTAG('s','o','w','t')) &&
2539 codec_id = AV_CODEC_ID_PCM_S8;
2540 } else if (!strcmp(track->codec_id, "V_QUICKTIME") &&
2541 (track->codec_priv.size >= 21) &&
2542 (track->codec_priv.data)) {
2543 int ret = get_qt_codec(track, &fourcc, &codec_id);
2546 if (codec_id == AV_CODEC_ID_NONE && AV_RL32(track->codec_priv.data+4) == AV_RL32("SMI ")) {
2547 fourcc = MKTAG('S','V','Q','3');
2548 codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc);
2550 if (codec_id == AV_CODEC_ID_NONE)
2551 av_log(matroska->ctx, AV_LOG_ERROR,
2552 "mov FourCC not found %s.\n", av_fourcc2str(fourcc));
2553 if (track->codec_priv.size >= 86) {
2554 bit_depth = AV_RB16(track->codec_priv.data + 82);
2555 ffio_init_context(&b, track->codec_priv.data,
2556 track->codec_priv.size,
2557 0, NULL, NULL, NULL, NULL);
2558 if (ff_get_qtpalette(codec_id, &b, track->palette)) {
2560 track->has_palette = 1;
2563 } else if (codec_id == AV_CODEC_ID_PCM_S16BE) {
2564 switch (track->audio.bitdepth) {
2566 codec_id = AV_CODEC_ID_PCM_U8;
2569 codec_id = AV_CODEC_ID_PCM_S24BE;
2572 codec_id = AV_CODEC_ID_PCM_S32BE;
2575 } else if (codec_id == AV_CODEC_ID_PCM_S16LE) {
2576 switch (track->audio.bitdepth) {
2578 codec_id = AV_CODEC_ID_PCM_U8;
2581 codec_id = AV_CODEC_ID_PCM_S24LE;
2584 codec_id = AV_CODEC_ID_PCM_S32LE;
2587 } else if (codec_id == AV_CODEC_ID_PCM_F32LE &&
2588 track->audio.bitdepth == 64) {
2589 codec_id = AV_CODEC_ID_PCM_F64LE;
2590 } else if (codec_id == AV_CODEC_ID_AAC && !track->codec_priv.size) {
2591 int profile = matroska_aac_profile(track->codec_id);
2592 int sri = matroska_aac_sri(track->audio.samplerate);
2593 extradata = av_mallocz(5 + AV_INPUT_BUFFER_PADDING_SIZE);
2595 return AVERROR(ENOMEM);
2596 extradata[0] = (profile << 3) | ((sri & 0x0E) >> 1);
2597 extradata[1] = ((sri & 0x01) << 7) | (track->audio.channels << 3);
2598 if (strstr(track->codec_id, "SBR")) {
2599 sri = matroska_aac_sri(track->audio.out_samplerate);
2600 extradata[2] = 0x56;
2601 extradata[3] = 0xE5;
2602 extradata[4] = 0x80 | (sri << 3);
2606 } else if (codec_id == AV_CODEC_ID_ALAC && track->codec_priv.size && track->codec_priv.size < INT_MAX - 12 - AV_INPUT_BUFFER_PADDING_SIZE) {
2607 /* Only ALAC's magic cookie is stored in Matroska's track headers.
2608 * Create the "atom size", "tag", and "tag version" fields the
2609 * decoder expects manually. */
2610 extradata_size = 12 + track->codec_priv.size;
2611 extradata = av_mallocz(extradata_size +
2612 AV_INPUT_BUFFER_PADDING_SIZE);
2614 return AVERROR(ENOMEM);
2615 AV_WB32(extradata, extradata_size);
2616 memcpy(&extradata[4], "alac", 4);
2617 AV_WB32(&extradata[8], 0);
2618 memcpy(&extradata[12], track->codec_priv.data,
2619 track->codec_priv.size);
2620 } else if (codec_id == AV_CODEC_ID_TTA) {
2622 if (track->audio.channels > UINT16_MAX ||
2623 track->audio.bitdepth > UINT16_MAX) {
2624 av_log(matroska->ctx, AV_LOG_WARNING,
2625 "Too large audio channel number %"PRIu64
2626 " or bitdepth %"PRIu64". Skipping track.\n",
2627 track->audio.channels, track->audio.bitdepth);
2628 if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
2629 return AVERROR_INVALIDDATA;
2633 if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
2634 return AVERROR_INVALIDDATA;
2635 extradata_size = 22;
2636 extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
2638 return AVERROR(ENOMEM);
2640 bytestream_put_be32(&ptr, AV_RB32("TTA1"));
2641 bytestream_put_le16(&ptr, 1);
2642 bytestream_put_le16(&ptr, track->audio.channels);
2643 bytestream_put_le16(&ptr, track->audio.bitdepth);
2644 bytestream_put_le32(&ptr, track->audio.out_samplerate);
2645 bytestream_put_le32(&ptr, av_rescale(matroska->duration * matroska->time_scale,
2646 track->audio.out_samplerate,
2647 AV_TIME_BASE * 1000));
2648 } else if (codec_id == AV_CODEC_ID_RV10 ||
2649 codec_id == AV_CODEC_ID_RV20 ||
2650 codec_id == AV_CODEC_ID_RV30 ||
2651 codec_id == AV_CODEC_ID_RV40) {
2652 extradata_offset = 26;
2653 } else if (codec_id == AV_CODEC_ID_RA_144) {
2654 track->audio.out_samplerate = 8000;
2655 track->audio.channels = 1;
2656 } else if ((codec_id == AV_CODEC_ID_RA_288 ||
2657 codec_id == AV_CODEC_ID_COOK ||
2658 codec_id == AV_CODEC_ID_ATRAC3 ||
2659 codec_id == AV_CODEC_ID_SIPR)
2660 && track->codec_priv.data) {
2663 ffio_init_context(&b, track->codec_priv.data,
2664 track->codec_priv.size,
2665 0, NULL, NULL, NULL, NULL);
2667 flavor = avio_rb16(&b);
2668 track->audio.coded_framesize = avio_rb32(&b);
2670 track->audio.sub_packet_h = avio_rb16(&b);
2671 track->audio.frame_size = avio_rb16(&b);
2672 track->audio.sub_packet_size = avio_rb16(&b);
2673 if (track->audio.coded_framesize <= 0 ||
2674 track->audio.sub_packet_h <= 0 ||
2675 track->audio.frame_size <= 0)
2676 return AVERROR_INVALIDDATA;
2678 if (codec_id == AV_CODEC_ID_RA_288) {
2679 if (track->audio.sub_packet_h & 1 || 2 * track->audio.frame_size
2680 != (int64_t)track->audio.sub_packet_h * track->audio.coded_framesize)
2681 return AVERROR_INVALIDDATA;
2682 st->codecpar->block_align = track->audio.coded_framesize;
2683 track->codec_priv.size = 0;
2685 if (codec_id == AV_CODEC_ID_SIPR) {
2686 static const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
2688 return AVERROR_INVALIDDATA;
2689 track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
2690 st->codecpar->bit_rate = sipr_bit_rate[flavor];
2691 } else if (track->audio.sub_packet_size <= 0 ||
2692 track->audio.frame_size % track->audio.sub_packet_size)
2693 return AVERROR_INVALIDDATA;
2694 st->codecpar->block_align = track->audio.sub_packet_size;
2695 extradata_offset = 78;
2697 track->audio.buf = av_malloc_array(track->audio.sub_packet_h,
2698 track->audio.frame_size);
2699 if (!track->audio.buf)
2700 return AVERROR(ENOMEM);
2701 } else if (codec_id == AV_CODEC_ID_FLAC && track->codec_priv.size) {
2702 ret = matroska_parse_flac(s, track, &extradata_offset);
2705 } else if (codec_id == AV_CODEC_ID_WAVPACK && track->codec_priv.size < 2) {
2706 av_log(matroska->ctx, AV_LOG_INFO, "Assuming WavPack version 4.10 "
2707 "in absence of valid CodecPrivate.\n");
2709 extradata = av_mallocz(2 + AV_INPUT_BUFFER_PADDING_SIZE);
2711 return AVERROR(ENOMEM);
2712 AV_WL16(extradata, 0x410);
2713 } else if (codec_id == AV_CODEC_ID_PRORES && track->codec_priv.size == 4) {
2714 fourcc = AV_RL32(track->codec_priv.data);
2715 } else if (codec_id == AV_CODEC_ID_VP9 && track->codec_priv.size) {
2716 /* we don't need any value stored in CodecPrivate.
2717 make sure that it's not exported as extradata. */
2718 track->codec_priv.size = 0;
2719 } else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
2720 /* For now, propagate only the OBUs, if any. Once libavcodec is
2721 updated to handle isobmff style extradata this can be removed. */
2722 extradata_offset = 4;
2724 track->codec_priv.size -= extradata_offset;
2726 if (codec_id == AV_CODEC_ID_NONE)
2727 av_log(matroska->ctx, AV_LOG_INFO,
2728 "Unknown/unsupported AVCodecID %s.\n", track->codec_id);
2730 if (track->time_scale < 0.01) {
2731 av_log(matroska->ctx, AV_LOG_WARNING,
2732 "Track TimestampScale too small %f, assuming 1.0.\n",
2734 track->time_scale = 1.0;
2736 avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale,
2737 1000 * 1000 * 1000); /* 64 bit pts in ns */
2739 /* convert the delay from ns to the track timebase */
2740 track->codec_delay_in_track_tb = av_rescale_q(track->codec_delay,
2741 (AVRational){ 1, 1000000000 },
2744 st->codecpar->codec_id = codec_id;
2746 if (strcmp(track->language, "und"))
2747 av_dict_set(&st->metadata, "language", track->language, 0);
2748 av_dict_set(&st->metadata, "title", track->name, 0);
2750 if (track->flag_default)
2751 st->disposition |= AV_DISPOSITION_DEFAULT;
2752 if (track->flag_forced)
2753 st->disposition |= AV_DISPOSITION_FORCED;
2754 if (track->flag_comment)
2755 st->disposition |= AV_DISPOSITION_COMMENT;
2756 if (track->flag_hearingimpaired)
2757 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2758 if (track->flag_visualimpaired)
2759 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2760 if (track->flag_original.count > 0)
2761 st->disposition |= track->flag_original.el.u ? AV_DISPOSITION_ORIGINAL
2762 : AV_DISPOSITION_DUB;
2764 if (!st->codecpar->extradata) {
2766 st->codecpar->extradata = extradata;
2767 st->codecpar->extradata_size = extradata_size;
2768 } else if (track->codec_priv.data && track->codec_priv.size > 0) {
2769 if (ff_alloc_extradata(st->codecpar, track->codec_priv.size))
2770 return AVERROR(ENOMEM);
2771 memcpy(st->codecpar->extradata,
2772 track->codec_priv.data + extradata_offset,
2773 track->codec_priv.size);
2777 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2778 MatroskaTrackPlane *planes = track->operation.combine_planes.elem;
2779 int display_width_mul = 1;
2780 int display_height_mul = 1;
2782 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
2783 st->codecpar->codec_tag = fourcc;
2785 st->codecpar->bits_per_coded_sample = bit_depth;
2786 st->codecpar->width = track->video.pixel_width;
2787 st->codecpar->height = track->video.pixel_height;
2789 if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED)
2790 st->codecpar->field_order = mkv_field_order(matroska, track->video.field_order);
2791 else if (track->video.interlaced == MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE)
2792 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2794 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2795 mkv_stereo_mode_display_mul(track->video.stereo_mode, &display_width_mul, &display_height_mul);
2797 if (track->video.display_unit < MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN) {
2798 av_reduce(&st->sample_aspect_ratio.num,
2799 &st->sample_aspect_ratio.den,
2800 st->codecpar->height * track->video.display_width * display_width_mul,
2801 st->codecpar->width * track->video.display_height * display_height_mul,
2804 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC)
2805 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2807 if (track->default_duration) {
2808 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2809 1000000000, track->default_duration, 30000);
2810 #if FF_API_R_FRAME_RATE
2811 if ( st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL
2812 && st->avg_frame_rate.num > st->avg_frame_rate.den * 5LL)
2813 st->r_frame_rate = st->avg_frame_rate;
2817 /* export stereo mode flag as metadata tag */
2818 if (track->video.stereo_mode && track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
2819 av_dict_set(&st->metadata, "stereo_mode", ff_matroska_video_stereo_mode[track->video.stereo_mode], 0);
2821 /* export alpha mode flag as metadata tag */
2822 if (track->video.alpha_mode)
2823 av_dict_set(&st->metadata, "alpha_mode", "1", 0);
2825 /* if we have virtual track, mark the real tracks */
2826 for (j=0; j < track->operation.combine_planes.nb_elem; j++) {
2828 if (planes[j].type >= MATROSKA_VIDEO_STEREO_PLANE_COUNT)
2830 snprintf(buf, sizeof(buf), "%s_%d",
2831 ff_matroska_video_stereo_plane[planes[j].type], i);
2832 for (k=0; k < matroska->tracks.nb_elem; k++)
2833 if (planes[j].uid == tracks[k].uid && tracks[k].stream) {
2834 av_dict_set(&tracks[k].stream->metadata,
2835 "stereo_mode", buf, 0);
2839 // add stream level stereo3d side data if it is a supported format
2840 if (track->video.stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
2841 track->video.stereo_mode != 10 && track->video.stereo_mode != 12) {
2842 int ret = ff_mkv_stereo3d_conv(st, track->video.stereo_mode);
2847 ret = mkv_parse_video_color(st, track);
2850 ret = mkv_parse_video_projection(st, track, matroska->ctx);
2853 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2854 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
2855 st->codecpar->codec_tag = fourcc;
2856 st->codecpar->sample_rate = track->audio.out_samplerate;
2857 st->codecpar->channels = track->audio.channels;
2858 if (!st->codecpar->bits_per_coded_sample)
2859 st->codecpar->bits_per_coded_sample = track->audio.bitdepth;
2860 if (st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
2861 st->codecpar->codec_id == AV_CODEC_ID_MLP ||
2862 st->codecpar->codec_id == AV_CODEC_ID_TRUEHD)
2863 st->need_parsing = AVSTREAM_PARSE_FULL;
2864 else if (st->codecpar->codec_id != AV_CODEC_ID_AAC)
2865 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2866 if (track->codec_delay > 0) {
2867 st->codecpar->initial_padding = av_rescale_q(track->codec_delay,
2868 (AVRational){1, 1000000000},
2869 (AVRational){1, st->codecpar->codec_id == AV_CODEC_ID_OPUS ?
2870 48000 : st->codecpar->sample_rate});
2872 if (track->seek_preroll > 0) {
2873 st->codecpar->seek_preroll = av_rescale_q(track->seek_preroll,
2874 (AVRational){1, 1000000000},
2875 (AVRational){1, st->codecpar->sample_rate});
2877 } else if (codec_id == AV_CODEC_ID_WEBVTT) {
2878 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2880 if (!strcmp(track->codec_id, "D_WEBVTT/CAPTIONS")) {
2881 st->disposition |= AV_DISPOSITION_CAPTIONS;
2882 } else if (!strcmp(track->codec_id, "D_WEBVTT/DESCRIPTIONS")) {
2883 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2884 } else if (!strcmp(track->codec_id, "D_WEBVTT/METADATA")) {
2885 st->disposition |= AV_DISPOSITION_METADATA;
2887 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2888 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2890 if (track->flag_textdescriptions)
2891 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2898 static int matroska_read_header(AVFormatContext *s)
2900 MatroskaDemuxContext *matroska = s->priv_data;
2901 EbmlList *attachments_list = &matroska->attachments;
2902 EbmlList *chapters_list = &matroska->chapters;
2903 MatroskaAttachment *attachments;
2904 MatroskaChapter *chapters;
2905 uint64_t max_start = 0;
2911 matroska->cues_parsing_deferred = 1;
2913 /* First read the EBML header. */
2914 if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
2915 av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n");
2916 ebml_free(ebml_syntax, &ebml);
2917 return AVERROR_INVALIDDATA;
2919 if (ebml.version > EBML_VERSION ||
2920 ebml.max_size > sizeof(uint64_t) ||
2921 ebml.id_length > sizeof(uint32_t) ||
2922 ebml.doctype_version > 3) {
2923 avpriv_report_missing_feature(matroska->ctx,
2924 "EBML version %"PRIu64", doctype %s, doc version %"PRIu64,
2925 ebml.version, ebml.doctype, ebml.doctype_version);
2926 ebml_free(ebml_syntax, &ebml);
2927 return AVERROR_PATCHWELCOME;
2928 } else if (ebml.doctype_version == 3) {
2929 av_log(matroska->ctx, AV_LOG_WARNING,
2930 "EBML header using unsupported features\n"
2931 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
2932 ebml.version, ebml.doctype, ebml.doctype_version);
2934 for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
2935 if (!strcmp(ebml.doctype, matroska_doctypes[i]))
2937 if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
2938 av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
2939 if (matroska->ctx->error_recognition & AV_EF_EXPLODE) {
2940 ebml_free(ebml_syntax, &ebml);
2941 return AVERROR_INVALIDDATA;
2944 ebml_free(ebml_syntax, &ebml);
2946 /* The next thing is a segment. */
2947 pos = avio_tell(matroska->ctx->pb);
2948 res = ebml_parse(matroska, matroska_segments, matroska);
2949 // Try resyncing until we find an EBML_STOP type element.
2951 res = matroska_resync(matroska, pos);
2954 pos = avio_tell(matroska->ctx->pb);
2955 res = ebml_parse(matroska, matroska_segment, matroska);
2956 if (res == AVERROR(EIO)) // EOF is translated to EIO, this exists the loop on EOF
2959 /* Set data_offset as it might be needed later by seek_frame_generic. */
2960 if (matroska->current_id == MATROSKA_ID_CLUSTER)
2961 s->internal->data_offset = avio_tell(matroska->ctx->pb) - 4;
2962 matroska_execute_seekhead(matroska);
2964 if (!matroska->time_scale)
2965 matroska->time_scale = 1000000;
2966 if (matroska->duration)
2967 matroska->ctx->duration = matroska->duration * matroska->time_scale *
2968 1000 / AV_TIME_BASE;
2969 av_dict_set(&s->metadata, "title", matroska->title, 0);
2970 av_dict_set(&s->metadata, "encoder", matroska->muxingapp, 0);
2972 if (matroska->date_utc.size == 8)
2973 matroska_metadata_creation_time(&s->metadata, AV_RB64(matroska->date_utc.data));
2975 res = matroska_parse_tracks(s);
2979 attachments = attachments_list->elem;
2980 for (j = 0; j < attachments_list->nb_elem; j++) {
2981 if (!(attachments[j].filename && attachments[j].mime &&
2982 attachments[j].bin.data && attachments[j].bin.size > 0)) {
2983 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
2985 AVStream *st = avformat_new_stream(s, NULL);
2988 av_dict_set(&st->metadata, "filename", attachments[j].filename, 0);
2989 av_dict_set(&st->metadata, "mimetype", attachments[j].mime, 0);
2990 if (attachments[j].description)
2991 av_dict_set(&st->metadata, "title", attachments[j].description, 0);
2992 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2994 for (i = 0; mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
2995 if (av_strstart(attachments[j].mime, mkv_image_mime_tags[i].str, NULL)) {
2996 st->codecpar->codec_id = mkv_image_mime_tags[i].id;
3001 attachments[j].stream = st;
3003 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
3004 AVPacket *pkt = &st->attached_pic;
3006 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
3007 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
3009 av_init_packet(pkt);
3010 pkt->buf = attachments[j].bin.buf;
3011 attachments[j].bin.buf = NULL;
3012 pkt->data = attachments[j].bin.data;
3013 pkt->size = attachments[j].bin.size;
3014 pkt->stream_index = st->index;
3015 pkt->flags |= AV_PKT_FLAG_KEY;
3017 st->codecpar->codec_type = AVMEDIA_TYPE_ATTACHMENT;
3018 if (ff_alloc_extradata(st->codecpar, attachments[j].bin.size))
3020 memcpy(st->codecpar->extradata, attachments[j].bin.data,
3021 attachments[j].bin.size);
3023 for (i = 0; mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) {
3024 if (av_strstart(attachments[j].mime, mkv_mime_tags[i].str, NULL)) {
3025 st->codecpar->codec_id = mkv_mime_tags[i].id;
3033 chapters = chapters_list->elem;
3034 for (i = 0; i < chapters_list->nb_elem; i++)
3035 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid &&
3036 (max_start == 0 || chapters[i].start > max_start)) {
3037 chapters[i].chapter =
3038 avpriv_new_chapter(s, chapters[i].uid,
3039 (AVRational) { 1, 1000000000 },
3040 chapters[i].start, chapters[i].end,
3042 max_start = chapters[i].start;
3045 matroska_add_index_entries(matroska);
3047 matroska_convert_tags(s);
3051 matroska_read_close(s);
3056 * Put one packet in an application-supplied AVPacket struct.
3057 * Returns 0 on success or -1 on failure.
3059 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
3062 if (matroska->queue) {
3063 MatroskaTrack *tracks = matroska->tracks.elem;
3064 MatroskaTrack *track;
3066 avpriv_packet_list_get(&matroska->queue, &matroska->queue_end, pkt);
3067 track = &tracks[pkt->stream_index];
3068 if (track->has_palette) {
3069 uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
3071 av_log(matroska->ctx, AV_LOG_ERROR, "Cannot append palette to packet\n");
3073 memcpy(pal, track->palette, AVPALETTE_SIZE);
3075 track->has_palette = 0;
3084 * Free all packets in our internal queue.
3086 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
3088 avpriv_packet_list_free(&matroska->queue, &matroska->queue_end);
3091 static int matroska_parse_laces(MatroskaDemuxContext *matroska, uint8_t **buf,
3092 int size, int type, AVIOContext *pb,
3093 uint32_t lace_size[256], int *laces)
3096 uint8_t *data = *buf;
3100 lace_size[0] = size;
3105 return AVERROR_INVALIDDATA;
3112 case 0x1: /* Xiph lacing */
3116 for (n = 0; n < *laces - 1; n++) {
3121 return AVERROR_INVALIDDATA;
3124 lace_size[n] += temp;
3127 } while (temp == 0xff);
3130 return AVERROR_INVALIDDATA;
3132 lace_size[n] = size - total;
3136 case 0x2: /* fixed-size lacing */
3137 if (size % (*laces))
3138 return AVERROR_INVALIDDATA;
3139 for (n = 0; n < *laces; n++)
3140 lace_size[n] = size / *laces;
3143 case 0x3: /* EBML lacing */
3151 n = ebml_read_num(matroska, pb, 8, &num, 1);
3155 return AVERROR_INVALIDDATA;
3157 total = lace_size[0] = num;
3159 for (n = 1; n < *laces - 1; n++) {
3162 r = matroska_ebmlnum_sint(matroska, pb, &snum);
3165 if (lace_size[n - 1] + snum > (uint64_t)INT_MAX)
3166 return AVERROR_INVALIDDATA;
3168 lace_size[n] = lace_size[n - 1] + snum;
3169 total += lace_size[n];
3175 return AVERROR_INVALIDDATA;
3177 lace_size[*laces - 1] = size - total;
3187 static int matroska_parse_rm_audio(MatroskaDemuxContext *matroska,
3188 MatroskaTrack *track, AVStream *st,
3189 uint8_t *data, int size, uint64_t timecode,
3192 const int a = st->codecpar->block_align;
3193 const int sps = track->audio.sub_packet_size;
3194 const int cfs = track->audio.coded_framesize;
3195 const int h = track->audio.sub_packet_h;
3196 const int w = track->audio.frame_size;
3197 int y = track->audio.sub_packet_cnt;
3200 if (!track->audio.pkt_cnt) {
3201 if (track->audio.sub_packet_cnt == 0)
3202 track->audio.buf_timecode = timecode;
3203 if (st->codecpar->codec_id == AV_CODEC_ID_RA_288) {
3204 if (size < cfs * h / 2) {
3205 av_log(matroska->ctx, AV_LOG_ERROR,
3206 "Corrupt int4 RM-style audio packet size\n");
3207 return AVERROR_INVALIDDATA;
3209 for (x = 0; x < h / 2; x++)
3210 memcpy(track->audio.buf + x * 2 * w + y * cfs,
3211 data + x * cfs, cfs);
3212 } else if (st->codecpar->codec_id == AV_CODEC_ID_SIPR) {
3214 av_log(matroska->ctx, AV_LOG_ERROR,
3215 "Corrupt sipr RM-style audio packet size\n");
3216 return AVERROR_INVALIDDATA;
3218 memcpy(track->audio.buf + y * w, data, w);
3221 av_log(matroska->ctx, AV_LOG_ERROR,
3222 "Corrupt generic RM-style audio packet size\n");
3223 return AVERROR_INVALIDDATA;
3225 for (x = 0; x < w / sps; x++)
3226 memcpy(track->audio.buf +
3227 sps * (h * x + ((h + 1) / 2) * (y & 1) + (y >> 1)),
3228 data + x * sps, sps);
3231 if (++track->audio.sub_packet_cnt >= h) {
3232 if (st->codecpar->codec_id == AV_CODEC_ID_SIPR)
3233 ff_rm_reorder_sipr_data(track->audio.buf, h, w);
3234 track->audio.sub_packet_cnt = 0;
3235 track->audio.pkt_cnt = h * w / a;
3239 while (track->audio.pkt_cnt) {
3241 AVPacket pktl, *pkt = &pktl;
3243 ret = av_new_packet(pkt, a);
3248 track->audio.buf + a * (h * w / a - track->audio.pkt_cnt--),
3250 pkt->pts = track->audio.buf_timecode;
3251 track->audio.buf_timecode = AV_NOPTS_VALUE;
3253 pkt->stream_index = st->index;
3254 ret = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3256 av_packet_unref(pkt);
3257 return AVERROR(ENOMEM);
3264 /* reconstruct full wavpack blocks from mangled matroska ones */
3265 static int matroska_parse_wavpack(MatroskaTrack *track,
3266 uint8_t **data, int *size)
3268 uint8_t *dst = NULL;
3269 uint8_t *src = *data;
3274 int ret, offset = 0;
3277 return AVERROR_INVALIDDATA;
3279 av_assert1(track->stream->codecpar->extradata_size >= 2);
3280 ver = AV_RL16(track->stream->codecpar->extradata);
3282 samples = AV_RL32(src);
3286 while (srclen >= 8) {
3291 uint32_t flags = AV_RL32(src);
3292 uint32_t crc = AV_RL32(src + 4);
3296 multiblock = (flags & 0x1800) != 0x1800;
3299 ret = AVERROR_INVALIDDATA;
3302 blocksize = AV_RL32(src);
3308 if (blocksize > srclen) {
3309 ret = AVERROR_INVALIDDATA;
3313 tmp = av_realloc(dst, dstlen + blocksize + 32 + AV_INPUT_BUFFER_PADDING_SIZE);
3315 ret = AVERROR(ENOMEM);
3319 dstlen += blocksize + 32;
3321 AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
3322 AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
3323 AV_WL16(dst + offset + 8, ver); // version
3324 AV_WL16(dst + offset + 10, 0); // track/index_no
3325 AV_WL32(dst + offset + 12, 0); // total samples
3326 AV_WL32(dst + offset + 16, 0); // block index
3327 AV_WL32(dst + offset + 20, samples); // number of samples
3328 AV_WL32(dst + offset + 24, flags); // flags
3329 AV_WL32(dst + offset + 28, crc); // crc
3330 memcpy(dst + offset + 32, src, blocksize); // block data
3333 srclen -= blocksize;
3334 offset += blocksize + 32;
3337 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3349 static int matroska_parse_prores(MatroskaTrack *track,
3350 uint8_t **data, int *size)
3353 int dstlen = *size + 8;
3355 dst = av_malloc(dstlen + AV_INPUT_BUFFER_PADDING_SIZE);
3357 return AVERROR(ENOMEM);
3359 AV_WB32(dst, dstlen);
3360 AV_WB32(dst + 4, MKBETAG('i', 'c', 'p', 'f'));
3361 memcpy(dst + 8, *data, dstlen - 8);
3362 memset(dst + dstlen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3370 static int matroska_parse_webvtt(MatroskaDemuxContext *matroska,
3371 MatroskaTrack *track,
3373 uint8_t *data, int data_len,
3378 AVPacket pktl, *pkt = &pktl;
3379 uint8_t *id, *settings, *text, *buf;
3380 int id_len, settings_len, text_len;
3385 return AVERROR_INVALIDDATA;
3388 q = data + data_len;
3393 if (*p == '\r' || *p == '\n') {
3402 if (p >= q || *p != '\n')
3403 return AVERROR_INVALIDDATA;
3409 if (*p == '\r' || *p == '\n') {
3410 settings_len = p - settings;
3418 if (p >= q || *p != '\n')
3419 return AVERROR_INVALIDDATA;
3424 while (text_len > 0) {
3425 const int len = text_len - 1;
3426 const uint8_t c = p[len];
3427 if (c != '\r' && c != '\n')
3433 return AVERROR_INVALIDDATA;
3435 err = av_new_packet(pkt, text_len);
3440 memcpy(pkt->data, text, text_len);
3443 buf = av_packet_new_side_data(pkt,
3444 AV_PKT_DATA_WEBVTT_IDENTIFIER,
3447 av_packet_unref(pkt);
3448 return AVERROR(ENOMEM);
3450 memcpy(buf, id, id_len);
3453 if (settings_len > 0) {
3454 buf = av_packet_new_side_data(pkt,
3455 AV_PKT_DATA_WEBVTT_SETTINGS,
3458 av_packet_unref(pkt);
3459 return AVERROR(ENOMEM);
3461 memcpy(buf, settings, settings_len);
3464 // Do we need this for subtitles?
3465 // pkt->flags = AV_PKT_FLAG_KEY;
3467 pkt->stream_index = st->index;
3468 pkt->pts = timecode;
3470 // Do we need this for subtitles?
3471 // pkt->dts = timecode;
3473 pkt->duration = duration;
3476 err = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3478 av_packet_unref(pkt);
3479 return AVERROR(ENOMEM);
3485 static int matroska_parse_frame(MatroskaDemuxContext *matroska,
3486 MatroskaTrack *track, AVStream *st,
3487 AVBufferRef *buf, uint8_t *data, int pkt_size,
3488 uint64_t timecode, uint64_t lace_duration,
3489 int64_t pos, int is_keyframe,
3490 uint8_t *additional, uint64_t additional_id, int additional_size,
3491 int64_t discard_padding)
3493 uint8_t *pkt_data = data;
3495 AVPacket pktl, *pkt = &pktl;
3497 if (st->codecpar->codec_id == AV_CODEC_ID_WAVPACK) {
3498 res = matroska_parse_wavpack(track, &pkt_data, &pkt_size);
3500 av_log(matroska->ctx, AV_LOG_ERROR,
3501 "Error parsing a wavpack block.\n");
3509 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES &&
3510 AV_RB32(pkt_data + 4) != MKBETAG('i', 'c', 'p', 'f')) {
3511 res = matroska_parse_prores(track, &pkt_data, &pkt_size);
3513 av_log(matroska->ctx, AV_LOG_ERROR,
3514 "Error parsing a prores block.\n");
3522 if (!pkt_size && !additional_size)
3525 av_init_packet(pkt);
3527 pkt->buf = av_buffer_create(pkt_data, pkt_size + AV_INPUT_BUFFER_PADDING_SIZE,
3530 pkt->buf = av_buffer_ref(buf);
3533 res = AVERROR(ENOMEM);
3537 pkt->data = pkt_data;
3538 pkt->size = pkt_size;
3539 pkt->flags = is_keyframe;
3540 pkt->stream_index = st->index;
3542 if (additional_size > 0) {
3543 uint8_t *side_data = av_packet_new_side_data(pkt,
3544 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
3545 additional_size + 8);
3547 av_packet_unref(pkt);
3548 return AVERROR(ENOMEM);
3550 AV_WB64(side_data, additional_id);
3551 memcpy(side_data + 8, additional, additional_size);
3554 if (discard_padding) {
3555 uint8_t *side_data = av_packet_new_side_data(pkt,
3556 AV_PKT_DATA_SKIP_SAMPLES,
3559 av_packet_unref(pkt);
3560 return AVERROR(ENOMEM);
3562 discard_padding = av_rescale_q(discard_padding,
3563 (AVRational){1, 1000000000},
3564 (AVRational){1, st->codecpar->sample_rate});
3565 if (discard_padding > 0) {
3566 AV_WL32(side_data + 4, discard_padding);
3568 AV_WL32(side_data, -discard_padding);
3572 if (track->ms_compat)
3573 pkt->dts = timecode;
3575 pkt->pts = timecode;
3577 pkt->duration = lace_duration;
3579 #if FF_API_CONVERGENCE_DURATION
3580 FF_DISABLE_DEPRECATION_WARNINGS
3581 if (st->codecpar->codec_id == AV_CODEC_ID_SUBRIP) {
3582 pkt->convergence_duration = lace_duration;
3584 FF_ENABLE_DEPRECATION_WARNINGS
3587 res = avpriv_packet_list_put(&matroska->queue, &matroska->queue_end, pkt, NULL, 0);
3589 av_packet_unref(pkt);
3590 return AVERROR(ENOMEM);
3602 static int matroska_parse_block(MatroskaDemuxContext *matroska, AVBufferRef *buf, uint8_t *data,
3603 int size, int64_t pos, uint64_t cluster_time,
3604 uint64_t block_duration, int is_keyframe,
3605 uint8_t *additional, uint64_t additional_id, int additional_size,
3606 int64_t cluster_pos, int64_t discard_padding)
3608 uint64_t timecode = AV_NOPTS_VALUE;
3609 MatroskaTrack *track;
3614 uint32_t lace_size[256];
3615 int n, flags, laces = 0;
3617 int trust_default_duration;
3619 ffio_init_context(&pb, data, size, 0, NULL, NULL, NULL, NULL);
3621 if ((n = ebml_read_num(matroska, &pb, 8, &num, 1)) < 0)
3626 track = matroska_find_track_by_num(matroska, num);
3627 if (!track || size < 3)
3628 return AVERROR_INVALIDDATA;
3630 if (!(st = track->stream)) {
3631 av_log(matroska->ctx, AV_LOG_VERBOSE,
3632 "No stream associated to TrackNumber %"PRIu64". "
3633 "Ignoring Block with this TrackNumber.\n", num);
3637 if (st->discard >= AVDISCARD_ALL)
3639 if (block_duration > INT64_MAX)
3640 block_duration = INT64_MAX;
3642 block_time = sign_extend(AV_RB16(data), 16);
3646 if (is_keyframe == -1)
3647 is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
3649 if (cluster_time != (uint64_t) -1 &&
3650 (block_time >= 0 || cluster_time >= -block_time)) {
3651 uint64_t timecode_cluster_in_track_tb = (double) cluster_time / track->time_scale;
3652 timecode = timecode_cluster_in_track_tb + block_time - track->codec_delay_in_track_tb;
3653 if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE &&
3654 timecode < track->end_timecode)
3655 is_keyframe = 0; /* overlapping subtitles are not key frame */
3657 ff_reduce_index(matroska->ctx, st->index);
3658 av_add_index_entry(st, cluster_pos, timecode, 0, 0,
3663 if (matroska->skip_to_keyframe &&
3664 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
3665 // Compare signed timecodes. Timecode may be negative due to codec delay
3666 // offset. We don't support timestamps greater than int64_t anyway - see
3668 if ((int64_t)timecode < (int64_t)matroska->skip_to_timecode)
3671 matroska->skip_to_keyframe = 0;
3672 else if (!st->internal->skip_to_keyframe) {
3673 av_log(matroska->ctx, AV_LOG_ERROR, "File is broken, keyframes not correctly marked!\n");
3674 matroska->skip_to_keyframe = 0;
3678 res = matroska_parse_laces(matroska, &data, size, (flags & 0x06) >> 1,
3679 &pb, lace_size, &laces);
3681 av_log(matroska->ctx, AV_LOG_ERROR, "Error parsing frame sizes.\n");
3685 trust_default_duration = track->default_duration != 0;
3686 if (track->audio.samplerate == 8000 && trust_default_duration) {
3687 // If this is needed for more codecs, then add them here
3688 if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
3689 if (track->audio.samplerate != st->codecpar->sample_rate || !st->codecpar->frame_size)
3690 trust_default_duration = 0;
3694 if (!block_duration && trust_default_duration)
3695 block_duration = track->default_duration * laces / matroska->time_scale;
3697 if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time))
3698 track->end_timecode =
3699 FFMAX(track->end_timecode, timecode + block_duration);
3701 for (n = 0; n < laces; n++) {
3702 int64_t lace_duration = block_duration*(n+1) / laces - block_duration*n / laces;
3703 uint8_t *out_data = data;
3704 int out_size = lace_size[n];
3706 if (track->needs_decoding) {
3707 res = matroska_decode_buffer(&out_data, &out_size, track);
3710 /* Given that we are here means that out_data is no longer
3711 * owned by buf, so set it to NULL. This depends upon
3712 * zero-length header removal compression being ignored. */
3713 av_assert1(out_data != data);
3717 if (track->audio.buf) {
3718 res = matroska_parse_rm_audio(matroska, track, st,
3725 } else if (st->codecpar->codec_id == AV_CODEC_ID_WEBVTT) {
3726 res = matroska_parse_webvtt(matroska, track, st,
3728 timecode, lace_duration,
3735 res = matroska_parse_frame(matroska, track, st, buf, out_data,
3736 out_size, timecode, lace_duration,
3737 pos, !n ? is_keyframe : 0,
3738 additional, additional_id, additional_size,
3744 if (timecode != AV_NOPTS_VALUE)
3745 timecode = lace_duration ? timecode + lace_duration : AV_NOPTS_VALUE;
3746 data += lace_size[n];
3752 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
3754 MatroskaCluster *cluster = &matroska->current_cluster;
3755 MatroskaBlock *block = &cluster->block;
3758 av_assert0(matroska->num_levels <= 2);
3760 if (matroska->num_levels == 1) {
3761 res = ebml_parse(matroska, matroska_segment, NULL);
3764 /* Found a cluster: subtract the size of the ID already read. */
3765 cluster->pos = avio_tell(matroska->ctx->pb) - 4;
3767 res = ebml_parse(matroska, matroska_cluster_enter, cluster);
3773 if (matroska->num_levels == 2) {
3774 /* We are inside a cluster. */
3775 res = ebml_parse(matroska, matroska_cluster_parsing, cluster);
3777 if (res >= 0 && block->bin.size > 0) {
3778 int is_keyframe = block->non_simple ? block->reference.count == 0 : -1;
3779 uint8_t* additional = block->additional.size > 0 ?
3780 block->additional.data : NULL;
3782 res = matroska_parse_block(matroska, block->bin.buf, block->bin.data,
3783 block->bin.size, block->bin.pos,
3784 cluster->timecode, block->duration,
3785 is_keyframe, additional, block->additional_id,
3786 block->additional.size, cluster->pos,
3787 block->discard_padding);
3790 ebml_free(matroska_blockgroup, block);
3791 memset(block, 0, sizeof(*block));
3792 } else if (!matroska->num_levels) {
3793 if (!avio_feof(matroska->ctx->pb)) {
3794 avio_r8(matroska->ctx->pb);
3795 if (!avio_feof(matroska->ctx->pb)) {
3796 av_log(matroska->ctx, AV_LOG_WARNING, "File extends beyond "
3797 "end of segment.\n");
3798 return AVERROR_INVALIDDATA;
3808 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
3810 MatroskaDemuxContext *matroska = s->priv_data;
3813 if (matroska->resync_pos == -1) {
3814 // This can only happen if generic seeking has been used.
3815 matroska->resync_pos = avio_tell(s->pb);
3818 while (matroska_deliver_packet(matroska, pkt)) {
3820 return (ret < 0) ? ret : AVERROR_EOF;
3821 if (matroska_parse_cluster(matroska) < 0 && !matroska->done)
3822 ret = matroska_resync(matroska, matroska->resync_pos);
3828 static int matroska_read_seek(AVFormatContext *s, int stream_index,
3829 int64_t timestamp, int flags)
3831 MatroskaDemuxContext *matroska = s->priv_data;
3832 MatroskaTrack *tracks = NULL;
3833 AVStream *st = s->streams[stream_index];
3836 /* Parse the CUES now since we need the index data to seek. */
3837 if (matroska->cues_parsing_deferred > 0) {
3838 matroska->cues_parsing_deferred = 0;
3839 matroska_parse_cues(matroska);
3842 if (!st->internal->nb_index_entries)
3844 timestamp = FFMAX(timestamp, st->internal->index_entries[0].timestamp);
3846 if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->internal->nb_index_entries - 1) {
3847 matroska_reset_status(matroska, 0, st->internal->index_entries[st->internal->nb_index_entries - 1].pos);
3848 while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0 || index == st->internal->nb_index_entries - 1) {
3849 matroska_clear_queue(matroska);
3850 if (matroska_parse_cluster(matroska) < 0)
3855 matroska_clear_queue(matroska);
3856 if (index < 0 || (matroska->cues_parsing_deferred < 0 && index == st->internal->nb_index_entries - 1))
3859 tracks = matroska->tracks.elem;
3860 for (i = 0; i < matroska->tracks.nb_elem; i++) {
3861 tracks[i].audio.pkt_cnt = 0;
3862 tracks[i].audio.sub_packet_cnt = 0;
3863 tracks[i].audio.buf_timecode = AV_NOPTS_VALUE;
3864 tracks[i].end_timecode = 0;
3867 /* We seek to a level 1 element, so set the appropriate status. */
3868 matroska_reset_status(matroska, 0, st->internal->index_entries[index].pos);
3869 if (flags & AVSEEK_FLAG_ANY) {
3870 st->internal->skip_to_keyframe = 0;
3871 matroska->skip_to_timecode = timestamp;
3873 st->internal->skip_to_keyframe = 1;
3874 matroska->skip_to_timecode = st->internal->index_entries[index].timestamp;
3876 matroska->skip_to_keyframe = 1;
3878 ff_update_cur_dts(s, st, st->internal->index_entries[index].timestamp);
3881 // slightly hackish but allows proper fallback to
3882 // the generic seeking code.
3883 matroska_reset_status(matroska, 0, -1);
3884 matroska->resync_pos = -1;
3885 matroska_clear_queue(matroska);
3886 st->internal->skip_to_keyframe =
3887 matroska->skip_to_keyframe = 0;
3892 static int matroska_read_close(AVFormatContext *s)
3894 MatroskaDemuxContext *matroska = s->priv_data;
3895 MatroskaTrack *tracks = matroska->tracks.elem;
3898 matroska_clear_queue(matroska);
3900 for (n = 0; n < matroska->tracks.nb_elem; n++)
3901 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
3902 av_freep(&tracks[n].audio.buf);
3903 ebml_free(matroska_segment, matroska);
3909 int64_t start_time_ns;
3910 int64_t end_time_ns;
3911 int64_t start_offset;
3915 /* This function searches all the Cues and returns the CueDesc corresponding to
3916 * the timestamp ts. Returned CueDesc will be such that start_time_ns <= ts <
3917 * end_time_ns. All 4 fields will be set to -1 if ts >= file's duration.
3919 static CueDesc get_cue_desc(AVFormatContext *s, int64_t ts, int64_t cues_start) {
3920 MatroskaDemuxContext *matroska = s->priv_data;
3923 int nb_index_entries = s->streams[0]->internal->nb_index_entries;
3924 AVIndexEntry *index_entries = s->streams[0]->internal->index_entries;
3925 if (ts >= matroska->duration * matroska->time_scale) return (CueDesc) {-1, -1, -1, -1};
3926 for (i = 1; i < nb_index_entries; i++) {
3927 if (index_entries[i - 1].timestamp * matroska->time_scale <= ts &&
3928 index_entries[i].timestamp * matroska->time_scale > ts) {
3933 cue_desc.start_time_ns = index_entries[i].timestamp * matroska->time_scale;
3934 cue_desc.start_offset = index_entries[i].pos - matroska->segment_start;
3935 if (i != nb_index_entries - 1) {
3936 cue_desc.end_time_ns = index_entries[i + 1].timestamp * matroska->time_scale;
3937 cue_desc.end_offset = index_entries[i + 1].pos - matroska->segment_start;
3939 cue_desc.end_time_ns = matroska->duration * matroska->time_scale;
3940 // FIXME: this needs special handling for files where Cues appear
3941 // before Clusters. the current logic assumes Cues appear after
3943 cue_desc.end_offset = cues_start - matroska->segment_start;
3948 static int webm_clusters_start_with_keyframe(AVFormatContext *s)
3950 MatroskaDemuxContext *matroska = s->priv_data;
3951 uint32_t id = matroska->current_id;
3952 int64_t cluster_pos, before_pos;
3954 if (s->streams[0]->internal->nb_index_entries <= 0) return 0;
3955 // seek to the first cluster using cues.
3956 index = av_index_search_timestamp(s->streams[0], 0, 0);
3957 if (index < 0) return 0;
3958 cluster_pos = s->streams[0]->internal->index_entries[index].pos;
3959 before_pos = avio_tell(s->pb);
3961 uint64_t cluster_id, cluster_length;
3964 avio_seek(s->pb, cluster_pos, SEEK_SET);
3965 // read cluster id and length
3966 read = ebml_read_num(matroska, matroska->ctx->pb, 4, &cluster_id, 1);
3967 if (read < 0 || cluster_id != 0xF43B675) // done with all clusters
3969 read = ebml_read_length(matroska, matroska->ctx->pb, &cluster_length);
3973 matroska_reset_status(matroska, 0, cluster_pos);
3974 matroska_clear_queue(matroska);
3975 if (matroska_parse_cluster(matroska) < 0 ||
3979 pkt = &matroska->queue->pkt;
3980 // 4 + read is the length of the cluster id and the cluster length field.
3981 cluster_pos += 4 + read + cluster_length;
3982 if (!(pkt->flags & AV_PKT_FLAG_KEY)) {
3988 /* Restore the status after matroska_read_header: */
3989 matroska_reset_status(matroska, id, before_pos);
3994 static int buffer_size_after_time_downloaded(int64_t time_ns, double search_sec, int64_t bps,
3995 double min_buffer, double* buffer,
3996 double* sec_to_download, AVFormatContext *s,
3999 double nano_seconds_per_second = 1000000000.0;
4000 double time_sec = time_ns / nano_seconds_per_second;
4002 int64_t time_to_search_ns = (int64_t)(search_sec * nano_seconds_per_second);
4003 int64_t end_time_ns = time_ns + time_to_search_ns;
4004 double sec_downloaded = 0.0;
4005 CueDesc desc_curr = get_cue_desc(s, time_ns, cues_start);
4006 if (desc_curr.start_time_ns == -1)
4008 *sec_to_download = 0.0;
4010 // Check for non cue start time.
4011 if (time_ns > desc_curr.start_time_ns) {
4012 int64_t cue_nano = desc_curr.end_time_ns - time_ns;
4013 double percent = (double)(cue_nano) / (desc_curr.end_time_ns - desc_curr.start_time_ns);
4014 double cueBytes = (desc_curr.end_offset - desc_curr.start_offset) * percent;
4015 double timeToDownload = (cueBytes * 8.0) / bps;
4017 sec_downloaded += (cue_nano / nano_seconds_per_second) - timeToDownload;
4018 *sec_to_download += timeToDownload;
4020 // Check if the search ends within the first cue.
4021 if (desc_curr.end_time_ns >= end_time_ns) {
4022 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4023 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4024 sec_downloaded = percent_to_sub * sec_downloaded;
4025 *sec_to_download = percent_to_sub * *sec_to_download;
4028 if ((sec_downloaded + *buffer) <= min_buffer) {
4032 // Get the next Cue.
4033 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4036 while (desc_curr.start_time_ns != -1) {
4037 int64_t desc_bytes = desc_curr.end_offset - desc_curr.start_offset;
4038 int64_t desc_ns = desc_curr.end_time_ns - desc_curr.start_time_ns;
4039 double desc_sec = desc_ns / nano_seconds_per_second;
4040 double bits = (desc_bytes * 8.0);
4041 double time_to_download = bits / bps;
4043 sec_downloaded += desc_sec - time_to_download;
4044 *sec_to_download += time_to_download;
4046 if (desc_curr.end_time_ns >= end_time_ns) {
4047 double desc_end_time_sec = desc_curr.end_time_ns / nano_seconds_per_second;
4048 double percent_to_sub = search_sec / (desc_end_time_sec - time_sec);
4049 sec_downloaded = percent_to_sub * sec_downloaded;
4050 *sec_to_download = percent_to_sub * *sec_to_download;
4052 if ((sec_downloaded + *buffer) <= min_buffer)
4057 if ((sec_downloaded + *buffer) <= min_buffer) {
4062 desc_curr = get_cue_desc(s, desc_curr.end_time_ns, cues_start);
4064 *buffer = *buffer + sec_downloaded;
4068 /* This function computes the bandwidth of the WebM file with the help of
4069 * buffer_size_after_time_downloaded() function. Both of these functions are
4070 * adapted from WebM Tools project and are adapted to work with FFmpeg's
4071 * Matroska parsing mechanism.
4073 * Returns the bandwidth of the file on success; -1 on error.
4075 static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t cues_start)
4077 MatroskaDemuxContext *matroska = s->priv_data;
4078 AVStream *st = s->streams[0];
4079 double bandwidth = 0.0;
4082 for (i = 0; i < st->internal->nb_index_entries; i++) {
4083 int64_t prebuffer_ns = 1000000000;
4084 int64_t time_ns = st->internal->index_entries[i].timestamp * matroska->time_scale;
4085 double nano_seconds_per_second = 1000000000.0;
4086 int64_t prebuffered_ns = time_ns + prebuffer_ns;
4087 double prebuffer_bytes = 0.0;
4088 int64_t temp_prebuffer_ns = prebuffer_ns;
4089 int64_t pre_bytes, pre_ns;
4090 double pre_sec, prebuffer, bits_per_second;
4091 CueDesc desc_beg = get_cue_desc(s, time_ns, cues_start);
4093 // Start with the first Cue.
4094 CueDesc desc_end = desc_beg;
4096 // Figure out how much data we have downloaded for the prebuffer. This will
4097 // be used later to adjust the bits per sample to try.
4098 while (desc_end.start_time_ns != -1 && desc_end.end_time_ns < prebuffered_ns) {
4099 // Prebuffered the entire Cue.
4100 prebuffer_bytes += desc_end.end_offset - desc_end.start_offset;
4101 temp_prebuffer_ns -= desc_end.end_time_ns - desc_end.start_time_ns;
4102 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4104 if (desc_end.start_time_ns == -1) {
4105 // The prebuffer is larger than the duration.
4106 if (matroska->duration * matroska->time_scale >= prebuffered_ns)
4108 bits_per_second = 0.0;
4110 // The prebuffer ends in the last Cue. Estimate how much data was
4112 pre_bytes = desc_end.end_offset - desc_end.start_offset;
4113 pre_ns = desc_end.end_time_ns - desc_end.start_time_ns;
4114 pre_sec = pre_ns / nano_seconds_per_second;
4116 pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
4118 prebuffer = prebuffer_ns / nano_seconds_per_second;
4120 // Set this to 0.0 in case our prebuffer buffers the entire video.
4121 bits_per_second = 0.0;
4123 int64_t desc_bytes = desc_end.end_offset - desc_beg.start_offset;
4124 int64_t desc_ns = desc_end.end_time_ns - desc_beg.start_time_ns;
4125 double desc_sec = desc_ns / nano_seconds_per_second;
4126 double calc_bits_per_second = (desc_bytes * 8) / desc_sec;
4128 // Drop the bps by the percentage of bytes buffered.
4129 double percent = (desc_bytes - prebuffer_bytes) / desc_bytes;
4130 double mod_bits_per_second = calc_bits_per_second * percent;
4132 if (prebuffer < desc_sec) {
4134 (double)(matroska->duration * matroska->time_scale) / nano_seconds_per_second;
4136 // Add 1 so the bits per second should be a little bit greater than file
4138 int64_t bps = (int64_t)(mod_bits_per_second) + 1;
4139 const double min_buffer = 0.0;
4140 double buffer = prebuffer;
4141 double sec_to_download = 0.0;
4143 int rv = buffer_size_after_time_downloaded(prebuffered_ns, search_sec, bps,
4144 min_buffer, &buffer, &sec_to_download,
4148 } else if (rv == 0) {
4149 bits_per_second = (double)(bps);
4154 desc_end = get_cue_desc(s, desc_end.end_time_ns, cues_start);
4155 } while (desc_end.start_time_ns != -1);
4157 if (bandwidth < bits_per_second) bandwidth = bits_per_second;
4159 return (int64_t)bandwidth;
4162 static int webm_dash_manifest_cues(AVFormatContext *s, int64_t init_range)
4164 MatroskaDemuxContext *matroska = s->priv_data;
4165 EbmlList *seekhead_list = &matroska->seekhead;
4166 MatroskaSeekhead *seekhead = seekhead_list->elem;
4168 int64_t cues_start = -1, cues_end = -1, before_pos, bandwidth;
4172 // determine cues start and end positions
4173 for (i = 0; i < seekhead_list->nb_elem; i++)
4174 if (seekhead[i].id == MATROSKA_ID_CUES)
4177 if (i >= seekhead_list->nb_elem) return -1;
4179 before_pos = avio_tell(matroska->ctx->pb);
4180 cues_start = seekhead[i].pos + matroska->segment_start;
4181 if (avio_seek(matroska->ctx->pb, cues_start, SEEK_SET) == cues_start) {
4182 // cues_end is computed as cues_start + cues_length + length of the
4183 // Cues element ID (i.e. 4) + EBML length of the Cues element.
4184 // cues_end is inclusive and the above sum is reduced by 1.
4185 uint64_t cues_length, cues_id;
4187 bytes_read = ebml_read_num (matroska, matroska->ctx->pb, 4, &cues_id, 1);
4188 if (bytes_read < 0 || cues_id != (MATROSKA_ID_CUES & 0xfffffff))
4189 return bytes_read < 0 ? bytes_read : AVERROR_INVALIDDATA;
4190 bytes_read = ebml_read_length(matroska, matroska->ctx->pb, &cues_length);
4193 cues_end = cues_start + 4 + bytes_read + cues_length - 1;
4195 avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
4196 if (cues_start == -1 || cues_end == -1) return -1;
4199 matroska_parse_cues(matroska);
4202 av_dict_set_int(&s->streams[0]->metadata, CUES_START, cues_start, 0);
4205 av_dict_set_int(&s->streams[0]->metadata, CUES_END, cues_end, 0);
4207 // if the file has cues at the start, fix up the init range so that
4208 // it does not include it
4209 if (cues_start <= init_range)
4210 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, cues_start - 1, 0);
4213 bandwidth = webm_dash_manifest_compute_bandwidth(s, cues_start);
4214 if (bandwidth < 0) return -1;
4215 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH, bandwidth, 0);
4217 // check if all clusters start with key frames
4218 av_dict_set_int(&s->streams[0]->metadata, CLUSTER_KEYFRAME, webm_clusters_start_with_keyframe(s), 0);
4220 // store cue point timestamps as a comma separated list for checking subsegment alignment in
4221 // the muxer. assumes that each timestamp cannot be more than 20 characters long.
4222 buf = av_malloc_array(s->streams[0]->internal->nb_index_entries, 20);
4223 if (!buf) return -1;
4225 for (i = 0; i < s->streams[0]->internal->nb_index_entries; i++) {
4226 int ret = snprintf(buf + end, 20,
4227 "%" PRId64"%s", s->streams[0]->internal->index_entries[i].timestamp,
4228 i != s->streams[0]->internal->nb_index_entries - 1 ? "," : "");
4229 if (ret <= 0 || (ret == 20 && i == s->streams[0]->internal->nb_index_entries - 1)) {
4230 av_log(s, AV_LOG_ERROR, "timestamp too long.\n");
4232 return AVERROR_INVALIDDATA;
4236 av_dict_set(&s->streams[0]->metadata, CUE_TIMESTAMPS,
4237 buf, AV_DICT_DONT_STRDUP_VAL);
4242 static int webm_dash_manifest_read_header(AVFormatContext *s)
4245 int ret = matroska_read_header(s);
4247 MatroskaTrack *tracks;
4248 MatroskaDemuxContext *matroska = s->priv_data;
4250 av_log(s, AV_LOG_ERROR, "Failed to read file headers\n");
4253 if (!matroska->tracks.nb_elem || !s->nb_streams) {
4254 av_log(s, AV_LOG_ERROR, "No track found\n");
4255 ret = AVERROR_INVALIDDATA;
4259 if (!matroska->is_live) {
4260 buf = av_asprintf("%g", matroska->duration);
4262 ret = AVERROR(ENOMEM);
4265 av_dict_set(&s->streams[0]->metadata, DURATION,
4266 buf, AV_DICT_DONT_STRDUP_VAL);
4268 // initialization range
4269 // 5 is the offset of Cluster ID.
4270 init_range = avio_tell(s->pb) - 5;
4271 av_dict_set_int(&s->streams[0]->metadata, INITIALIZATION_RANGE, init_range, 0);
4274 // basename of the file
4275 buf = strrchr(s->url, '/');
4276 av_dict_set(&s->streams[0]->metadata, FILENAME, buf ? ++buf : s->url, 0);
4279 tracks = matroska->tracks.elem;
4280 av_dict_set_int(&s->streams[0]->metadata, TRACK_NUMBER, tracks[0].num, 0);
4282 // parse the cues and populate Cue related fields
4283 if (!matroska->is_live) {
4284 ret = webm_dash_manifest_cues(s, init_range);
4286 av_log(s, AV_LOG_ERROR, "Error parsing Cues\n");
4291 // use the bandwidth from the command line if it was provided
4292 if (matroska->bandwidth > 0) {
4293 av_dict_set_int(&s->streams[0]->metadata, BANDWIDTH,
4294 matroska->bandwidth, 0);
4298 matroska_read_close(s);
4302 static int webm_dash_manifest_read_packet(AVFormatContext *s, AVPacket *pkt)
4307 #define OFFSET(x) offsetof(MatroskaDemuxContext, x)
4308 static const AVOption options[] = {
4309 { "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 },
4310 { "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 },
4314 static const AVClass webm_dash_class = {
4315 .class_name = "WebM DASH Manifest demuxer",
4316 .item_name = av_default_item_name,
4318 .version = LIBAVUTIL_VERSION_INT,
4321 AVInputFormat ff_matroska_demuxer = {
4322 .name = "matroska,webm",
4323 .long_name = NULL_IF_CONFIG_SMALL("Matroska / WebM"),
4324 .extensions = "mkv,mk3d,mka,mks,webm",
4325 .priv_data_size = sizeof(MatroskaDemuxContext),
4326 .read_probe = matroska_probe,
4327 .read_header = matroska_read_header,
4328 .read_packet = matroska_read_packet,
4329 .read_close = matroska_read_close,
4330 .read_seek = matroska_read_seek,
4331 .mime_type = "audio/webm,audio/x-matroska,video/webm,video/x-matroska"
4334 AVInputFormat ff_webm_dash_manifest_demuxer = {
4335 .name = "webm_dash_manifest",
4336 .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
4337 .priv_data_size = sizeof(MatroskaDemuxContext),
4338 .read_header = webm_dash_manifest_read_header,
4339 .read_packet = webm_dash_manifest_read_packet,
4340 .read_close = matroska_read_close,
4341 .priv_class = &webm_dash_class,