2 * Matroska file demuxer (no muxer yet)
3 * Copyright (c) 2003-2004 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 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
26 * with a little help from Moritz Bunkus <moritz@bunkus.org>
27 * Specs available on the matroska project page:
28 * http://www.matroska.org/.
32 /* For codec_get_id(). */
36 #include "libavcodec/mpeg4audio.h"
37 #include "libavutil/intfloat_readwrite.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/lzo.h"
59 typedef const struct EbmlSyntax {
68 const struct EbmlSyntax *n;
88 uint64_t doctype_version;
94 } MatroskaTrackCompression;
99 MatroskaTrackCompression compression;
100 } MatroskaTrackEncoding;
104 uint64_t display_width;
105 uint64_t display_height;
106 uint64_t pixel_width;
107 uint64_t pixel_height;
109 } MatroskaTrackVideo;
113 double out_samplerate;
117 /* real audio header (extracted from extradata) */
125 } MatroskaTrackAudio;
134 uint64_t default_duration;
135 uint64_t flag_default;
136 MatroskaTrackVideo video;
137 MatroskaTrackAudio audio;
147 } MatroskaAttachement;
177 AVFormatContext *ctx;
181 MatroskaLevel levels[EBML_MAX_DEPTH];
188 EbmlList attachments;
193 /* num_streams is the number of streams that av_new_stream() was called
194 * for ( = that are available to the calling program). */
197 /* cache for ID peeking */
200 /* byte position of the segment inside the stream */
201 offset_t segment_start;
203 /* The packet queue. */
210 /* What to skip before effectively reading a packet. */
211 int skip_to_keyframe;
212 AVStream *skip_to_stream;
213 } MatroskaDemuxContext;
226 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x))
228 static EbmlSyntax ebml_header[] = {
229 { EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
230 { EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
231 { EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
232 { EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
233 { EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
234 { EBML_ID_EBMLVERSION, EBML_NONE },
235 { EBML_ID_DOCTYPEVERSION, EBML_NONE },
236 { EBML_ID_VOID, EBML_NONE },
240 static EbmlSyntax ebml_syntax[] = {
241 { EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
245 static EbmlSyntax matroska_info[] = {
246 { MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
247 { MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
248 { MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
249 { MATROSKA_ID_WRITINGAPP, EBML_NONE },
250 { MATROSKA_ID_MUXINGAPP, EBML_NONE },
251 { MATROSKA_ID_DATEUTC, EBML_NONE },
252 { MATROSKA_ID_SEGMENTUID, EBML_NONE },
253 { EBML_ID_VOID, EBML_NONE },
257 static EbmlSyntax matroska_track_video[] = {
258 { MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
259 { MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
260 { MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
261 { MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
262 { MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
263 { MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
264 { MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
265 { MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
266 { MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
267 { EBML_ID_VOID, EBML_NONE },
271 static EbmlSyntax matroska_track_audio[] = {
272 { MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
273 { MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
274 { MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
275 { MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
276 { EBML_ID_VOID, EBML_NONE },
280 static EbmlSyntax matroska_track_encoding_compression[] = {
281 { MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
282 { MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
283 { EBML_ID_VOID, EBML_NONE },
287 static EbmlSyntax matroska_track_encoding[] = {
288 { MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
289 { MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
290 { MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
291 { EBML_ID_VOID, EBML_NONE },
295 static EbmlSyntax matroska_track_encodings[] = {
296 { MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
297 { EBML_ID_VOID, EBML_NONE },
301 static EbmlSyntax matroska_track[] = {
302 { MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
303 { MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
304 { MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
305 { MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
306 { MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
307 { MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
308 { MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
309 { MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
310 { MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
311 { MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
312 { MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
313 { MATROSKA_ID_TRACKUID, EBML_NONE },
314 { MATROSKA_ID_TRACKNAME, EBML_NONE },
315 { MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
316 { MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE },
317 { MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
318 { MATROSKA_ID_CODECNAME, EBML_NONE },
319 { MATROSKA_ID_CODECDECODEALL, EBML_NONE },
320 { MATROSKA_ID_CODECINFOURL, EBML_NONE },
321 { MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
322 { MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
323 { MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
324 { EBML_ID_VOID, EBML_NONE },
328 static EbmlSyntax matroska_tracks[] = {
329 { MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
330 { EBML_ID_VOID, EBML_NONE },
334 static EbmlSyntax matroska_attachment[] = {
335 { MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
336 { MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
337 { MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
338 { MATROSKA_ID_FILEUID, EBML_NONE },
339 { EBML_ID_VOID, EBML_NONE },
343 static EbmlSyntax matroska_attachments[] = {
344 { MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
345 { EBML_ID_VOID, EBML_NONE },
349 static EbmlSyntax matroska_chapter_display[] = {
350 { MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
351 { EBML_ID_VOID, EBML_NONE },
355 static EbmlSyntax matroska_chapter_entry[] = {
356 { MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
357 { MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
358 { MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
359 { MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
360 { MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
361 { EBML_ID_VOID, EBML_NONE },
365 static EbmlSyntax matroska_chapter[] = {
366 { MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
367 { MATROSKA_ID_EDITIONUID, EBML_NONE },
368 { MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
369 { MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
370 { EBML_ID_VOID, EBML_NONE },
374 static EbmlSyntax matroska_chapters[] = {
375 { MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
376 { EBML_ID_VOID, EBML_NONE },
380 static EbmlSyntax matroska_index_pos[] = {
381 { MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
382 { MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
383 { EBML_ID_VOID, EBML_NONE },
387 static EbmlSyntax matroska_index_entry[] = {
388 { MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
389 { MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
390 { EBML_ID_VOID, EBML_NONE },
394 static EbmlSyntax matroska_index[] = {
395 { MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
396 { EBML_ID_VOID, EBML_NONE },
400 static EbmlSyntax matroska_tags[] = {
401 { EBML_ID_VOID, EBML_NONE },
405 static EbmlSyntax matroska_seekhead_entry[] = {
406 { MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
407 { MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
408 { EBML_ID_VOID, EBML_NONE },
412 static EbmlSyntax matroska_seekhead[] = {
413 { MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
414 { EBML_ID_VOID, EBML_NONE },
418 static EbmlSyntax matroska_segment[] = {
419 { MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
420 { MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
421 { MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
422 { MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
423 { MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
424 { MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
425 { MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
426 { MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) },
427 { EBML_ID_VOID, EBML_NONE },
431 static EbmlSyntax matroska_segments[] = {
432 { MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
436 static EbmlSyntax matroska_blockgroup[] = {
437 { MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
438 { MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
439 { MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
440 { MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
441 { EBML_ID_VOID, EBML_NONE },
445 static EbmlSyntax matroska_cluster[] = {
446 { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
447 { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
448 { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
449 { EBML_ID_VOID, EBML_NONE },
453 static EbmlSyntax matroska_clusters[] = {
454 { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
459 * Return: whether we reached the end of a level in the hierarchy or not
461 static int ebml_level_end(MatroskaDemuxContext *matroska)
463 ByteIOContext *pb = matroska->ctx->pb;
464 offset_t pos = url_ftell(pb);
466 if (matroska->num_levels > 0) {
467 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
468 if (pos - level->start >= level->length) {
469 matroska->num_levels--;
477 * Read: an "EBML number", which is defined as a variable-length
478 * array of bytes. The first byte indicates the length by giving a
479 * number of 0-bits followed by a one. The position of the first
480 * "one" bit inside the first byte indicates the length of this
482 * Returns: num. of bytes read. < 0 on error.
484 static int ebml_read_num(MatroskaDemuxContext *matroska,
485 int max_size, uint64_t *number)
487 ByteIOContext *pb = matroska->ctx->pb;
488 int len_mask = 0x80, read = 1, n = 1;
491 /* the first byte tells us the length in bytes - get_byte() can normally
492 * return 0, but since that's not a valid first ebmlID byte, we can
493 * use it safely here to catch EOS. */
494 if (!(total = get_byte(pb))) {
495 /* we might encounter EOS here */
497 offset_t pos = url_ftell(pb);
498 av_log(matroska->ctx, AV_LOG_ERROR,
499 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
502 return AVERROR(EIO); /* EOS or actual I/O error */
505 /* get the length of the EBML number */
506 while (read <= max_size && !(total & len_mask)) {
510 if (read > max_size) {
511 offset_t pos = url_ftell(pb) - 1;
512 av_log(matroska->ctx, AV_LOG_ERROR,
513 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
514 (uint8_t) total, pos, pos);
515 return AVERROR_INVALIDDATA;
518 /* read out length */
521 total = (total << 8) | get_byte(pb);
529 * Read: the element content data ID.
530 * 0 is success, < 0 is failure.
532 static int ebml_read_element_id(MatroskaDemuxContext *matroska, uint32_t *id)
537 /* if we re-call this, use our cached ID */
538 if (matroska->peek_id != 0) {
539 *id = matroska->peek_id;
543 /* read out the "EBML number", include tag in ID */
544 if ((read = ebml_read_num(matroska, 4, &total)) < 0)
546 *id = matroska->peek_id = total | (1 << (read * 7));
552 * Read: element content length.
553 * Return: the number of bytes read or < 0 on error.
555 static int ebml_read_element_length(MatroskaDemuxContext *matroska,
558 /* clear cache since we're now beyond that data point */
559 matroska->peek_id = 0;
561 /* read out the "EBML number", include tag in ID */
562 return ebml_read_num(matroska, 8, length);
566 * Seek to a given offset.
567 * 0 is success, -1 is failure.
569 static int ebml_read_seek(MatroskaDemuxContext *matroska, offset_t offset)
571 ByteIOContext *pb = matroska->ctx->pb;
573 /* clear ID cache, if any */
574 matroska->peek_id = 0;
576 return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1;
580 * Read the next element as an unsigned int.
581 * 0 is success, < 0 is failure.
583 static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num)
587 if (size < 1 || size > 8)
588 return AVERROR_INVALIDDATA;
590 /* big-endian ordening; build up number */
593 *num = (*num << 8) | get_byte(pb);
599 * Read the next element as a float.
600 * 0 is success, < 0 is failure.
602 static int ebml_read_float(ByteIOContext *pb, int size, double *num)
605 *num= av_int2flt(get_be32(pb));
607 *num= av_int2dbl(get_be64(pb));
609 return AVERROR_INVALIDDATA;
615 * Read the next element as an ASCII string.
616 * 0 is success, < 0 is failure.
618 static int ebml_read_ascii(ByteIOContext *pb, int size, char **str)
621 /* ebml strings are usually not 0-terminated, so we allocate one
622 * byte more, read the string and NULL-terminate it ourselves. */
623 if (!(*str = av_malloc(size + 1)))
624 return AVERROR(ENOMEM);
625 if (get_buffer(pb, (uint8_t *) *str, size) != size) {
635 * Read the next element, but only the header. The contents
636 * are supposed to be sub-elements which can be read separately.
637 * 0 is success, < 0 is failure.
639 static int ebml_read_master(MatroskaDemuxContext *matroska, int length)
641 ByteIOContext *pb = matroska->ctx->pb;
642 MatroskaLevel *level;
644 if (matroska->num_levels >= EBML_MAX_DEPTH) {
645 av_log(matroska->ctx, AV_LOG_ERROR,
646 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
647 return AVERROR(ENOSYS);
650 level = &matroska->levels[matroska->num_levels++];
651 level->start = url_ftell(pb);
652 level->length = length;
658 * Read the next element as binary data.
659 * 0 is success, < 0 is failure.
661 static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin)
664 if (!(bin->data = av_malloc(length)))
665 return AVERROR(ENOMEM);
668 bin->pos = url_ftell(pb);
669 if (get_buffer(pb, bin->data, length) != length)
676 * Read signed/unsigned "EBML" numbers.
677 * Return: number of bytes processed, < 0 on error.
678 * XXX: use ebml_read_num().
680 static int matroska_ebmlnum_uint(uint8_t *data, uint32_t size, uint64_t *num)
682 int len_mask = 0x80, read = 1, n = 1, num_ffs = 0;
686 return AVERROR_INVALIDDATA;
689 while (read <= 8 && !(total & len_mask)) {
694 return AVERROR_INVALIDDATA;
696 if ((total &= (len_mask - 1)) == len_mask - 1)
699 return AVERROR_INVALIDDATA;
703 total = (total << 8) | data[n];
716 * Same as above, but signed.
718 static int matroska_ebmlnum_sint(uint8_t *data, uint32_t size, int64_t *num)
723 /* read as unsigned number first */
724 if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0)
727 /* make signed (weird way) */
728 if (unum == (uint64_t)-1)
731 *num = unum - ((1LL << ((7 * res) - 1)) - 1);
737 static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
740 MatroskaTrack *tracks = matroska->tracks.elem;
743 for (i=0; i < matroska->tracks.nb_elem; i++)
744 if (tracks[i].num == num)
747 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
753 * Put one packet in an application-supplied AVPacket struct.
754 * Returns 0 on success or -1 on failure.
756 static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
759 if (matroska->num_packets > 0) {
760 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
761 av_free(matroska->packets[0]);
762 if (matroska->num_packets > 1) {
763 memmove(&matroska->packets[0], &matroska->packets[1],
764 (matroska->num_packets - 1) * sizeof(AVPacket *));
766 av_realloc(matroska->packets, (matroska->num_packets - 1) *
769 av_freep(&matroska->packets);
771 matroska->num_packets--;
779 * Put a packet into our internal queue. Will be delivered to the
780 * user/application during the next get_packet() call.
782 static void matroska_queue_packet(MatroskaDemuxContext *matroska, AVPacket *pkt)
785 av_realloc(matroska->packets, (matroska->num_packets + 1) *
787 matroska->packets[matroska->num_packets] = pkt;
788 matroska->num_packets++;
792 * Free all packets in our internal queue.
794 static void matroska_clear_queue(MatroskaDemuxContext *matroska)
796 if (matroska->packets) {
798 for (n = 0; n < matroska->num_packets; n++) {
799 av_free_packet(matroska->packets[n]);
800 av_free(matroska->packets[n]);
802 av_free(matroska->packets);
803 matroska->packets = NULL;
804 matroska->num_packets = 0;
812 static int matroska_probe(AVProbeData *p)
815 int len_mask = 0x80, size = 1, n = 1;
816 char probe_data[] = "matroska";
819 if (AV_RB32(p->buf) != EBML_ID_HEADER)
822 /* length of header */
824 while (size <= 8 && !(total & len_mask)) {
830 total &= (len_mask - 1);
832 total = (total << 8) | p->buf[4 + n++];
834 /* does the probe data contain the whole header? */
835 if (p->buf_size < 4 + size + total)
838 /* the header must contain the document type 'matroska'. For now,
839 * we don't parse the whole header but simply check for the
840 * availability of that array of characters inside the header.
841 * Not fully fool-proof, but good enough. */
842 for (n = 4+size; n <= 4+size+total-(sizeof(probe_data)-1); n++)
843 if (!memcmp(p->buf+n, probe_data, sizeof(probe_data)-1))
844 return AVPROBE_SCORE_MAX;
849 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
850 void *data, int once);
852 static int ebml_parse_elem(MatroskaDemuxContext *matroska,
853 EbmlSyntax *syntax, void *data)
855 ByteIOContext *pb = matroska->ctx->pb;
856 uint32_t id = syntax->id;
860 data = (char *)data + syntax->data_offset;
861 if (syntax->list_elem_size) {
862 EbmlList *list = data;
863 list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
864 data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
865 memset(data, 0, syntax->list_elem_size);
869 if (syntax->type != EBML_PASS && syntax->type != EBML_STOP)
870 if ((res = ebml_read_element_id(matroska, &id)) < 0 ||
871 (res = ebml_read_element_length(matroska, &length)) < 0)
874 switch (syntax->type) {
875 case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
876 case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
878 case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
879 case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
880 case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
882 if (id == MATROSKA_ID_SEGMENT)
883 matroska->segment_start = url_ftell(matroska->ctx->pb);
884 return ebml_parse(matroska, syntax->def.n, data, 0);
885 case EBML_PASS: return ebml_parse(matroska, syntax->def.n, data, 1);
886 case EBML_STOP: *(int *)data = 1; return 1;
887 default: url_fskip(pb, length); return 0;
889 if (res == AVERROR_INVALIDDATA)
890 av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
891 else if (res == AVERROR(EIO))
892 av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
896 static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
897 uint32_t id, void *data)
900 for (i=0; syntax[i].id; i++)
901 if (id == syntax[i].id)
904 av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
905 return ebml_parse_elem(matroska, &syntax[i], data);
908 static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
909 void *data, int once)
914 for (i=0; syntax[i].id; i++)
915 switch (syntax[i].type) {
917 *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
920 *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
924 *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
928 while (!res && !ebml_level_end(matroska)) {
929 res = ebml_read_element_id(matroska, &id);
931 res = ebml_parse_id(matroska, syntax, id, data);
939 static void ebml_free(EbmlSyntax *syntax, void *data)
942 for (i=0; syntax[i].id; i++) {
943 void *data_off = (char *)data + syntax[i].data_offset;
944 switch (syntax[i].type) {
946 case EBML_UTF8: av_freep(data_off); break;
947 case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
949 if (syntax[i].list_elem_size) {
950 EbmlList *list = data_off;
951 char *ptr = list->elem;
952 for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
953 ebml_free(syntax[i].def.n, ptr);
956 ebml_free(syntax[i].def.n, data_off);
962 static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
963 MatroskaTrack *track)
965 MatroskaTrackEncoding *encodings = track->encodings.elem;
966 uint8_t* data = *buf;
967 int isize = *buf_size;
968 uint8_t* pkt_data = NULL;
969 int pkt_size = isize;
973 switch (encodings[0].compression.algo) {
974 case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
975 return encodings[0].compression.settings.size;
976 case MATROSKA_TRACK_ENCODING_COMP_LZO:
978 olen = pkt_size *= 3;
979 pkt_data = av_realloc(pkt_data,
980 pkt_size+LZO_OUTPUT_PADDING);
981 result = lzo1x_decode(pkt_data, &olen, data, &isize);
982 } while (result==LZO_OUTPUT_FULL && pkt_size<10000000);
988 case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
989 z_stream zstream = {0};
990 if (inflateInit(&zstream) != Z_OK)
992 zstream.next_in = data;
993 zstream.avail_in = isize;
996 pkt_data = av_realloc(pkt_data, pkt_size);
997 zstream.avail_out = pkt_size - zstream.total_out;
998 zstream.next_out = pkt_data + zstream.total_out;
999 result = inflate(&zstream, Z_NO_FLUSH);
1000 } while (result==Z_OK && pkt_size<10000000);
1001 pkt_size = zstream.total_out;
1002 inflateEnd(&zstream);
1003 if (result != Z_STREAM_END)
1009 case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
1010 bz_stream bzstream = {0};
1011 if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
1013 bzstream.next_in = data;
1014 bzstream.avail_in = isize;
1017 pkt_data = av_realloc(pkt_data, pkt_size);
1018 bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
1019 bzstream.next_out = pkt_data + bzstream.total_out_lo32;
1020 result = BZ2_bzDecompress(&bzstream);
1021 } while (result==BZ_OK && pkt_size<10000000);
1022 pkt_size = bzstream.total_out_lo32;
1023 BZ2_bzDecompressEnd(&bzstream);
1024 if (result != BZ_STREAM_END)
1032 *buf_size = pkt_size;
1039 static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
1041 EbmlList *seekhead_list = &matroska->seekhead;
1042 MatroskaSeekhead *seekhead = seekhead_list->elem;
1043 uint32_t peek_id_cache = matroska->peek_id;
1044 uint32_t level_up = matroska->level_up;
1045 offset_t before_pos = url_ftell(matroska->ctx->pb);
1046 MatroskaLevel level;
1049 for (i=0; i<seekhead_list->nb_elem; i++) {
1050 if (seekhead[i].pos <= before_pos
1051 || seekhead[i].id == MATROSKA_ID_SEEKHEAD
1052 || seekhead[i].id == MATROSKA_ID_CLUSTER)
1056 if (ebml_read_seek(matroska,
1057 seekhead[i].pos+matroska->segment_start) < 0)
1060 /* we don't want to lose our seekhead level, so we add
1061 * a dummy. This is a crude hack. */
1062 if (matroska->num_levels == EBML_MAX_DEPTH) {
1063 av_log(matroska->ctx, AV_LOG_INFO,
1064 "Max EBML element depth (%d) reached, "
1065 "cannot parse further.\n", EBML_MAX_DEPTH);
1070 level.length = (uint64_t)-1;
1071 matroska->levels[matroska->num_levels] = level;
1072 matroska->num_levels++;
1074 ebml_parse_id(matroska, matroska_segment, seekhead[i].id, matroska);
1076 /* remove dummy level */
1077 while (matroska->num_levels) {
1078 uint64_t length = matroska->levels[--matroska->num_levels].length;
1079 if (length == (uint64_t)-1)
1085 ebml_read_seek(matroska, before_pos);
1086 matroska->peek_id = peek_id_cache;
1087 matroska->level_up = level_up;
1090 static int matroska_aac_profile(char *codec_id)
1092 static const char *aac_profiles[] = { "MAIN", "LC", "SSR" };
1095 for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++)
1096 if (strstr(codec_id, aac_profiles[profile]))
1101 static int matroska_aac_sri(int samplerate)
1105 for (sri=0; sri<ARRAY_SIZE(ff_mpeg4audio_sample_rates); sri++)
1106 if (ff_mpeg4audio_sample_rates[sri] == samplerate)
1111 static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
1113 MatroskaDemuxContext *matroska = s->priv_data;
1114 EbmlList *attachements_list = &matroska->attachments;
1115 MatroskaAttachement *attachements;
1116 EbmlList *chapters_list = &matroska->chapters;
1117 MatroskaChapter *chapters;
1118 MatroskaTrack *tracks;
1119 EbmlList *index_list;
1120 MatroskaIndex *index;
1127 /* First read the EBML header. */
1128 if (ebml_parse(matroska, ebml_syntax, &ebml, 1)
1129 || ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
1130 || ebml.id_length > sizeof(uint32_t) || strcmp(ebml.doctype, "matroska")
1131 || ebml.doctype_version > 2) {
1132 av_log(matroska->ctx, AV_LOG_ERROR,
1133 "EBML header using unsupported features\n"
1134 "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
1135 ebml.version, ebml.doctype, ebml.doctype_version);
1136 return AVERROR_NOFMT;
1138 ebml_free(ebml_syntax, &ebml);
1140 /* The next thing is a segment. */
1141 if (ebml_parse(matroska, matroska_segments, matroska, 1) < 0)
1143 matroska_execute_seekhead(matroska);
1145 if (matroska->duration)
1146 matroska->ctx->duration = matroska->duration * matroska->time_scale
1147 * 1000 / AV_TIME_BASE;
1148 if (matroska->title)
1149 strncpy(matroska->ctx->title, matroska->title,
1150 sizeof(matroska->ctx->title)-1);
1152 tracks = matroska->tracks.elem;
1153 for (i=0; i < matroska->tracks.nb_elem; i++) {
1154 MatroskaTrack *track = &tracks[i];
1155 enum CodecID codec_id = CODEC_ID_NONE;
1156 EbmlList *encodings_list = &tracks->encodings;
1157 MatroskaTrackEncoding *encodings = encodings_list->elem;
1158 uint8_t *extradata = NULL;
1159 int extradata_size = 0;
1160 int extradata_offset = 0;
1162 /* Apply some sanity checks. */
1163 if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
1164 track->type != MATROSKA_TRACK_TYPE_AUDIO &&
1165 track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
1166 av_log(matroska->ctx, AV_LOG_INFO,
1167 "Unknown or unsupported track type %"PRIu64"\n",
1171 if (track->codec_id == NULL)
1174 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1175 if (!track->default_duration)
1176 track->default_duration = 1000000000/track->video.frame_rate;
1177 if (!track->video.display_width)
1178 track->video.display_width = track->video.pixel_width;
1179 if (!track->video.display_height)
1180 track->video.display_height = track->video.pixel_height;
1181 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1182 if (!track->audio.out_samplerate)
1183 track->audio.out_samplerate = track->audio.samplerate;
1185 if (encodings_list->nb_elem > 1) {
1186 av_log(matroska->ctx, AV_LOG_ERROR,
1187 "Multiple combined encodings no supported");
1188 } else if (encodings_list->nb_elem == 1) {
1189 if (encodings[0].type ||
1190 (encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
1192 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
1195 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
1197 encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
1198 encodings[0].scope = 0;
1199 av_log(matroska->ctx, AV_LOG_ERROR,
1200 "Unsupported encoding type");
1201 } else if (track->codec_priv.size && encodings[0].scope&2) {
1202 uint8_t *codec_priv = track->codec_priv.data;
1203 int offset = matroska_decode_buffer(&track->codec_priv.data,
1204 &track->codec_priv.size,
1207 track->codec_priv.data = NULL;
1208 track->codec_priv.size = 0;
1209 av_log(matroska->ctx, AV_LOG_ERROR,
1210 "Failed to decode codec private data\n");
1211 } else if (offset > 0) {
1212 track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
1213 memcpy(track->codec_priv.data,
1214 encodings[0].compression.settings.data, offset);
1215 memcpy(track->codec_priv.data+offset, codec_priv,
1216 track->codec_priv.size);
1217 track->codec_priv.size += offset;
1219 if (codec_priv != track->codec_priv.data)
1220 av_free(codec_priv);
1224 for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
1225 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
1226 strlen(ff_mkv_codec_tags[j].str))){
1227 codec_id= ff_mkv_codec_tags[j].id;
1232 st = track->stream = av_new_stream(s, matroska->num_streams++);
1234 return AVERROR(ENOMEM);
1236 if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC)
1237 && track->codec_priv.size >= 40
1238 && track->codec_priv.data != NULL) {
1239 track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
1240 codec_id = codec_get_id(codec_bmp_tags, track->video.fourcc);
1241 } else if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_AUDIO_ACM)
1242 && track->codec_priv.size >= 18
1243 && track->codec_priv.data != NULL) {
1244 uint16_t tag = AV_RL16(track->codec_priv.data);
1245 codec_id = codec_get_id(codec_wav_tags, tag);
1246 } else if (!strcmp(track->codec_id, "V_QUICKTIME")
1247 && (track->codec_priv.size >= 86)
1248 && (track->codec_priv.data != NULL)) {
1249 track->video.fourcc = AV_RL32(track->codec_priv.data);
1250 codec_id=codec_get_id(codec_movvideo_tags, track->video.fourcc);
1251 } else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
1252 int profile = matroska_aac_profile(track->codec_id);
1253 int sri = matroska_aac_sri(track->audio.samplerate);
1254 extradata = av_malloc(5);
1255 if (extradata == NULL)
1256 return AVERROR(ENOMEM);
1257 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
1258 extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
1259 if (strstr(track->codec_id, "SBR")) {
1260 sri = matroska_aac_sri(track->audio.out_samplerate);
1261 extradata[2] = 0x56;
1262 extradata[3] = 0xE5;
1263 extradata[4] = 0x80 | (sri<<3);
1267 } else if (codec_id == CODEC_ID_TTA) {
1269 extradata_size = 30;
1270 extradata = av_mallocz(extradata_size);
1271 if (extradata == NULL)
1272 return AVERROR(ENOMEM);
1273 init_put_byte(&b, extradata, extradata_size, 1,
1274 NULL, NULL, NULL, NULL);
1275 put_buffer(&b, "TTA1", 4);
1277 put_le16(&b, track->audio.channels);
1278 put_le16(&b, track->audio.bitdepth);
1279 put_le32(&b, track->audio.out_samplerate);
1280 put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate);
1281 } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
1282 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
1283 extradata_offset = 26;
1284 track->codec_priv.size -= extradata_offset;
1285 } else if (codec_id == CODEC_ID_RA_144) {
1286 track->audio.out_samplerate = 8000;
1287 track->audio.channels = 1;
1288 } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
1289 codec_id == CODEC_ID_ATRAC3) {
1292 init_put_byte(&b, track->codec_priv.data,track->codec_priv.size,
1293 0, NULL, NULL, NULL, NULL);
1295 track->audio.coded_framesize = get_be32(&b);
1297 track->audio.sub_packet_h = get_be16(&b);
1298 track->audio.frame_size = get_be16(&b);
1299 track->audio.sub_packet_size = get_be16(&b);
1300 track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
1301 if (codec_id == CODEC_ID_RA_288) {
1302 st->codec->block_align = track->audio.coded_framesize;
1303 track->codec_priv.size = 0;
1305 st->codec->block_align = track->audio.sub_packet_size;
1306 extradata_offset = 78;
1307 track->codec_priv.size -= extradata_offset;
1311 if (codec_id == CODEC_ID_NONE)
1312 av_log(matroska->ctx, AV_LOG_INFO,
1313 "Unknown/unsupported CodecID %s.\n", track->codec_id);
1315 av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
1317 st->codec->codec_id = codec_id;
1319 if (strcmp(track->language, "und"))
1320 av_strlcpy(st->language, track->language, 4);
1322 if (track->flag_default)
1323 st->disposition |= AV_DISPOSITION_DEFAULT;
1325 if (track->default_duration)
1326 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
1327 track->default_duration, 1000000000, 30000);
1330 st->codec->extradata = extradata;
1331 st->codec->extradata_size = extradata_size;
1332 } else if(track->codec_priv.data && track->codec_priv.size > 0){
1333 st->codec->extradata = av_malloc(track->codec_priv.size);
1334 if(st->codec->extradata == NULL)
1335 return AVERROR(ENOMEM);
1336 st->codec->extradata_size = track->codec_priv.size;
1337 memcpy(st->codec->extradata,
1338 track->codec_priv.data + extradata_offset,
1339 track->codec_priv.size);
1342 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
1343 st->codec->codec_type = CODEC_TYPE_VIDEO;
1344 st->codec->codec_tag = track->video.fourcc;
1345 st->codec->width = track->video.pixel_width;
1346 st->codec->height = track->video.pixel_height;
1347 av_reduce(&st->codec->sample_aspect_ratio.num,
1348 &st->codec->sample_aspect_ratio.den,
1349 st->codec->height * track->video.display_width,
1350 st->codec-> width * track->video.display_height,
1352 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1353 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
1354 st->codec->codec_type = CODEC_TYPE_AUDIO;
1355 st->codec->sample_rate = track->audio.out_samplerate;
1356 st->codec->channels = track->audio.channels;
1357 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
1358 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
1362 attachements = attachements_list->elem;
1363 for (j=0; j<attachements_list->nb_elem; j++) {
1364 if (!(attachements[j].filename && attachements[j].mime &&
1365 attachements[j].bin.data && attachements[j].bin.size > 0)) {
1366 av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
1368 AVStream *st = av_new_stream(s, matroska->num_streams++);
1371 st->filename = av_strdup(attachements[j].filename);
1372 st->codec->codec_id = CODEC_ID_NONE;
1373 st->codec->codec_type = CODEC_TYPE_ATTACHMENT;
1374 st->codec->extradata = av_malloc(attachements[j].bin.size);
1375 if(st->codec->extradata == NULL)
1377 st->codec->extradata_size = attachements[j].bin.size;
1378 memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
1380 for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
1381 if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
1382 strlen(ff_mkv_mime_tags[i].str))) {
1383 st->codec->codec_id = ff_mkv_mime_tags[i].id;
1390 chapters = chapters_list->elem;
1391 for (i=0; i<chapters_list->nb_elem; i++)
1392 if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid)
1393 ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
1394 chapters[i].start, chapters[i].end,
1397 index_list = &matroska->index;
1398 index = index_list->elem;
1399 for (i=0; i<index_list->nb_elem; i++) {
1400 EbmlList *pos_list = &index[i].pos;
1401 MatroskaIndexPos *pos = pos_list->elem;
1402 for (j=0; j<pos_list->nb_elem; j++) {
1403 MatroskaTrack *track = matroska_find_track_by_num(matroska,
1405 if (track && track->stream)
1406 av_add_index_entry(track->stream,
1407 pos[j].pos + matroska->segment_start,
1408 index[i].time*matroska->time_scale/AV_TIME_BASE,
1409 0, 0, AVINDEX_KEYFRAME);
1416 static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
1417 int size, int64_t pos, uint64_t cluster_time,
1418 uint64_t duration, int is_keyframe)
1420 MatroskaTrack *track;
1425 uint32_t *lace_size = NULL;
1426 int n, flags, laces = 0;
1429 if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) {
1430 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
1436 track = matroska_find_track_by_num(matroska, num);
1437 if (size <= 3 || !track || !track->stream) {
1438 av_log(matroska->ctx, AV_LOG_INFO,
1439 "Invalid stream %"PRIu64" or size %u\n", num, size);
1443 if (st->discard >= AVDISCARD_ALL)
1445 if (duration == AV_NOPTS_VALUE)
1446 duration = track->default_duration / matroska->time_scale;
1448 block_time = AV_RB16(data);
1452 if (is_keyframe == -1)
1453 is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0;
1455 if (matroska->skip_to_keyframe) {
1456 if (!is_keyframe || st != matroska->skip_to_stream)
1458 matroska->skip_to_keyframe = 0;
1461 switch ((flags & 0x06) >> 1) {
1462 case 0x0: /* no lacing */
1464 lace_size = av_mallocz(sizeof(int));
1465 lace_size[0] = size;
1468 case 0x1: /* xiph lacing */
1469 case 0x2: /* fixed-size lacing */
1470 case 0x3: /* EBML lacing */
1471 assert(size>0); // size <=3 is checked before size-=3 above
1472 laces = (*data) + 1;
1475 lace_size = av_mallocz(laces * sizeof(int));
1477 switch ((flags & 0x06) >> 1) {
1478 case 0x1: /* xiph lacing */ {
1481 for (n = 0; res == 0 && n < laces - 1; n++) {
1488 lace_size[n] += temp;
1494 total += lace_size[n];
1496 lace_size[n] = size - total;
1500 case 0x2: /* fixed-size lacing */
1501 for (n = 0; n < laces; n++)
1502 lace_size[n] = size / laces;
1505 case 0x3: /* EBML lacing */ {
1507 n = matroska_ebmlnum_uint(data, size, &num);
1509 av_log(matroska->ctx, AV_LOG_INFO,
1510 "EBML block data error\n");
1515 total = lace_size[0] = num;
1516 for (n = 1; res == 0 && n < laces - 1; n++) {
1519 r = matroska_ebmlnum_sint (data, size, &snum);
1521 av_log(matroska->ctx, AV_LOG_INFO,
1522 "EBML block data error\n");
1527 lace_size[n] = lace_size[n - 1] + snum;
1528 total += lace_size[n];
1530 lace_size[n] = size - total;
1538 uint64_t timecode = AV_NOPTS_VALUE;
1540 if (cluster_time != (uint64_t)-1
1541 && (block_time >= 0 || cluster_time >= -block_time))
1542 timecode = cluster_time + block_time;
1544 for (n = 0; n < laces; n++) {
1545 if (st->codec->codec_id == CODEC_ID_RA_288 ||
1546 st->codec->codec_id == CODEC_ID_COOK ||
1547 st->codec->codec_id == CODEC_ID_ATRAC3) {
1548 int a = st->codec->block_align;
1549 int sps = track->audio.sub_packet_size;
1550 int cfs = track->audio.coded_framesize;
1551 int h = track->audio.sub_packet_h;
1552 int y = track->audio.sub_packet_cnt;
1553 int w = track->audio.frame_size;
1556 if (!track->audio.pkt_cnt) {
1557 if (st->codec->codec_id == CODEC_ID_RA_288)
1558 for (x=0; x<h/2; x++)
1559 memcpy(track->audio.buf+x*2*w+y*cfs,
1562 for (x=0; x<w/sps; x++)
1563 memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
1565 if (++track->audio.sub_packet_cnt >= h) {
1566 track->audio.sub_packet_cnt = 0;
1567 track->audio.pkt_cnt = h*w / a;
1570 while (track->audio.pkt_cnt) {
1571 pkt = av_mallocz(sizeof(AVPacket));
1572 av_new_packet(pkt, a);
1573 memcpy(pkt->data, track->audio.buf
1574 + a * (h*w / a - track->audio.pkt_cnt--), a);
1576 pkt->stream_index = st->index;
1577 matroska_queue_packet(matroska, pkt);
1580 MatroskaTrackEncoding *encodings = track->encodings.elem;
1581 int offset = 0, pkt_size = lace_size[n];
1582 uint8_t *pkt_data = data;
1584 if (encodings && encodings->scope & 1) {
1585 offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
1590 pkt = av_mallocz(sizeof(AVPacket));
1591 /* XXX: prevent data copy... */
1592 if (av_new_packet(pkt, pkt_size+offset) < 0) {
1594 res = AVERROR(ENOMEM);
1599 memcpy (pkt->data, encodings->compression.settings.data, offset);
1600 memcpy (pkt->data+offset, pkt_data, pkt_size);
1602 if (pkt_data != data)
1606 pkt->flags = is_keyframe;
1607 pkt->stream_index = st->index;
1609 pkt->pts = timecode;
1611 pkt->duration = duration;
1613 matroska_queue_packet(matroska, pkt);
1616 if (timecode != AV_NOPTS_VALUE)
1617 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
1618 data += lace_size[n];
1626 static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
1628 MatroskaCluster cluster = { 0 };
1629 EbmlList *blocks_list;
1630 MatroskaBlock *blocks;
1631 int i, res = ebml_parse(matroska, matroska_clusters, &cluster, 1);
1632 blocks_list = &cluster.blocks;
1633 blocks = blocks_list->elem;
1634 for (i=0; !res && i<blocks_list->nb_elem; i++)
1635 if (blocks[i].bin.size > 0)
1636 res=matroska_parse_block(matroska,
1637 blocks[i].bin.data, blocks[i].bin.size,
1638 blocks[i].bin.pos, cluster.timecode,
1639 blocks[i].duration, !blocks[i].reference);
1640 ebml_free(matroska_cluster, &cluster);
1644 static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
1646 MatroskaDemuxContext *matroska = s->priv_data;
1648 while (matroska_deliver_packet(matroska, pkt)) {
1650 return AVERROR(EIO);
1651 if (matroska_parse_cluster(matroska) < 0)
1658 static int matroska_read_seek(AVFormatContext *s, int stream_index,
1659 int64_t timestamp, int flags)
1661 MatroskaDemuxContext *matroska = s->priv_data;
1662 AVStream *st = s->streams[stream_index];
1665 index = av_index_search_timestamp(st, timestamp, flags);
1669 matroska_clear_queue(matroska);
1671 url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
1672 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
1673 matroska->skip_to_stream = st;
1674 matroska->peek_id = 0;
1675 av_update_cur_dts(s, st, st->index_entries[index].timestamp);
1679 static int matroska_read_close(AVFormatContext *s)
1681 MatroskaDemuxContext *matroska = s->priv_data;
1682 MatroskaTrack *tracks = matroska->tracks.elem;
1685 matroska_clear_queue(matroska);
1687 for (n=0; n < matroska->tracks.nb_elem; n++)
1688 if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
1689 av_free(tracks[n].audio.buf);
1690 ebml_free(matroska_segment, matroska);
1695 AVInputFormat matroska_demuxer = {
1697 NULL_IF_CONFIG_SMALL("Matroska file format"),
1698 sizeof(MatroskaDemuxContext),
1700 matroska_read_header,
1701 matroska_read_packet,
1702 matroska_read_close,