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(). */
34 #include "intfloat_readwrite.h"
37 typedef struct Track {
38 MatroskaTrackType type;
40 /* Unique track number and track ID. stream_index is the index that
41 * the calling app uses for this track. */
52 unsigned char *codec_priv;
55 uint64_t default_duration;
56 MatroskaTrackFlags flags;
59 typedef struct MatroskaVideoTrack {
69 MatroskaAspectRatioMode ar_mode;
70 MatroskaEyeMode eye_mode;
75 typedef struct MatroskaAudioTrack {
80 int internal_samplerate;
84 /* real audio header */
95 typedef struct MatroskaSubtitleTrack {
99 } MatroskaSubtitleTrack;
101 #define MAX_TRACK_SIZE (FFMAX(FFMAX(sizeof(MatroskaVideoTrack), \
102 sizeof(MatroskaAudioTrack)), \
103 sizeof(MatroskaSubtitleTrack)))
105 typedef struct MatroskaLevel {
110 typedef struct MatroskaDemuxIndex {
111 uint64_t pos; /* of the corresponding *cluster*! */
112 uint16_t track; /* reference to 'num' */
113 uint64_t time; /* in nanoseconds */
114 } MatroskaDemuxIndex;
116 typedef struct MatroskaDemuxContext {
117 AVFormatContext *ctx;
121 MatroskaLevel levels[EBML_MAX_DEPTH];
129 /* timescale in the file */
132 /* num_streams is the number of streams that av_new_stream() was called
133 * for ( = that are available to the calling program). */
136 MatroskaTrack *tracks[MAX_STREAMS];
138 /* cache for ID peeking */
141 /* byte position of the segment inside the stream */
142 offset_t segment_start;
144 /* The packet queue. */
148 /* have we already parse metadata/cues/clusters? */
153 /* The index for seeking. */
155 MatroskaDemuxIndex *index;
157 /* What to skip before effectively reading a packet. */
158 int skip_to_keyframe;
159 AVStream *skip_to_stream;
160 } MatroskaDemuxContext;
163 * The first few functions handle EBML file parsing. The rest
164 * is the document interpretation. Matroska really just is a
169 * Return: the amount of levels in the hierarchy that the
170 * current element lies higher than the previous one.
171 * The opposite isn't done - that's auto-done using master
176 ebml_read_element_level_up (MatroskaDemuxContext *matroska)
178 ByteIOContext *pb = &matroska->ctx->pb;
179 offset_t pos = url_ftell(pb);
182 while (matroska->num_levels > 0) {
183 MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
185 if (pos >= level->start + level->length) {
186 matroska->num_levels--;
197 * Read: an "EBML number", which is defined as a variable-length
198 * array of bytes. The first byte indicates the length by giving a
199 * number of 0-bits followed by a one. The position of the first
200 * "one" bit inside the first byte indicates the length of this
202 * Returns: num. of bytes read. < 0 on error.
206 ebml_read_num (MatroskaDemuxContext *matroska,
210 ByteIOContext *pb = &matroska->ctx->pb;
211 int len_mask = 0x80, read = 1, n = 1;
214 /* the first byte tells us the length in bytes - get_byte() can normally
215 * return 0, but since that's not a valid first ebmlID byte, we can
216 * use it safely here to catch EOS. */
217 if (!(total = get_byte(pb))) {
218 /* we might encounter EOS here */
220 offset_t pos = url_ftell(pb);
221 av_log(matroska->ctx, AV_LOG_ERROR,
222 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
225 return AVERROR_IO; /* EOS or actual I/O error */
228 /* get the length of the EBML number */
229 while (read <= max_size && !(total & len_mask)) {
233 if (read > max_size) {
234 offset_t pos = url_ftell(pb) - 1;
235 av_log(matroska->ctx, AV_LOG_ERROR,
236 "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
237 (uint8_t) total, pos, pos);
238 return AVERROR_INVALIDDATA;
241 /* read out length */
244 total = (total << 8) | get_byte(pb);
252 * Read: the element content data ID.
253 * Return: the number of bytes read or < 0 on error.
257 ebml_read_element_id (MatroskaDemuxContext *matroska,
264 /* if we re-call this, use our cached ID */
265 if (matroska->peek_id != 0) {
268 *id = matroska->peek_id;
272 /* read out the "EBML number", include tag in ID */
273 if ((read = ebml_read_num(matroska, 4, &total)) < 0)
275 *id = matroska->peek_id = total | (1 << (read * 7));
279 *level_up = ebml_read_element_level_up(matroska);
285 * Read: element content length.
286 * Return: the number of bytes read or < 0 on error.
290 ebml_read_element_length (MatroskaDemuxContext *matroska,
293 /* clear cache since we're now beyond that data point */
294 matroska->peek_id = 0;
296 /* read out the "EBML number", include tag in ID */
297 return ebml_read_num(matroska, 8, length);
301 * Return: the ID of the next element, or 0 on error.
302 * Level_up contains the amount of levels that this
303 * next element lies higher than the previous one.
307 ebml_peek_id (MatroskaDemuxContext *matroska,
312 assert(level_up != NULL);
314 if (ebml_read_element_id(matroska, &id, level_up) < 0)
321 * Seek to a given offset.
322 * 0 is success, -1 is failure.
326 ebml_read_seek (MatroskaDemuxContext *matroska,
329 ByteIOContext *pb = &matroska->ctx->pb;
331 /* clear ID cache, if any */
332 matroska->peek_id = 0;
334 return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1;
338 * Skip the next element.
339 * 0 is success, -1 is failure.
343 ebml_read_skip (MatroskaDemuxContext *matroska)
345 ByteIOContext *pb = &matroska->ctx->pb;
350 if ((res = ebml_read_element_id(matroska, &id, NULL)) < 0 ||
351 (res = ebml_read_element_length(matroska, &length)) < 0)
354 url_fskip(pb, length);
360 * Read the next element as an unsigned int.
361 * 0 is success, < 0 is failure.
365 ebml_read_uint (MatroskaDemuxContext *matroska,
369 ByteIOContext *pb = &matroska->ctx->pb;
370 int n = 0, size, res;
373 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
374 (res = ebml_read_element_length(matroska, &rlength)) < 0)
377 if (size < 1 || size > 8) {
378 offset_t pos = url_ftell(pb);
379 av_log(matroska->ctx, AV_LOG_ERROR,
380 "Invalid uint element size %d at position %"PRId64" (0x%"PRIx64")\n",
382 return AVERROR_INVALIDDATA;
385 /* big-endian ordening; build up number */
388 *num = (*num << 8) | get_byte(pb);
394 * Read the next element as a signed int.
395 * 0 is success, < 0 is failure.
399 ebml_read_sint (MatroskaDemuxContext *matroska,
403 ByteIOContext *pb = &matroska->ctx->pb;
404 int size, n = 1, negative = 0, res;
407 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
408 (res = ebml_read_element_length(matroska, &rlength)) < 0)
411 if (size < 1 || size > 8) {
412 offset_t pos = url_ftell(pb);
413 av_log(matroska->ctx, AV_LOG_ERROR,
414 "Invalid sint element size %d at position %"PRId64" (0x%"PRIx64")\n",
416 return AVERROR_INVALIDDATA;
418 if ((*num = get_byte(pb)) & 0x80) {
423 *num = (*num << 8) | get_byte(pb);
427 *num = *num - (1LL << ((8 * size) - 1));
433 * Read the next element as a float.
434 * 0 is success, < 0 is failure.
438 ebml_read_float (MatroskaDemuxContext *matroska,
442 ByteIOContext *pb = &matroska->ctx->pb;
446 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
447 (res = ebml_read_element_length(matroska, &rlength)) < 0)
452 *num= av_int2flt(get_be32(pb));
454 *num= av_int2dbl(get_be64(pb));
456 offset_t pos = url_ftell(pb);
457 av_log(matroska->ctx, AV_LOG_ERROR,
458 "Invalid float element size %d at position %"PRIu64" (0x%"PRIx64")\n",
460 return AVERROR_INVALIDDATA;
467 * Read the next element as an ASCII string.
468 * 0 is success, < 0 is failure.
472 ebml_read_ascii (MatroskaDemuxContext *matroska,
476 ByteIOContext *pb = &matroska->ctx->pb;
480 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
481 (res = ebml_read_element_length(matroska, &rlength)) < 0)
485 /* ebml strings are usually not 0-terminated, so we allocate one
486 * byte more, read the string and NULL-terminate it ourselves. */
487 if (size < 0 || !(*str = av_malloc(size + 1))) {
488 av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation failed\n");
489 return AVERROR_NOMEM;
491 if (get_buffer(pb, (uint8_t *) *str, size) != size) {
492 offset_t pos = url_ftell(pb);
493 av_log(matroska->ctx, AV_LOG_ERROR,
494 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
503 * Read the next element as a UTF-8 string.
504 * 0 is success, < 0 is failure.
508 ebml_read_utf8 (MatroskaDemuxContext *matroska,
512 return ebml_read_ascii(matroska, id, str);
516 * Read the next element as a date (nanoseconds since 1/1/2000).
517 * 0 is success, < 0 is failure.
521 ebml_read_date (MatroskaDemuxContext *matroska,
525 return ebml_read_sint(matroska, id, date);
529 * Read the next element, but only the header. The contents
530 * are supposed to be sub-elements which can be read separately.
531 * 0 is success, < 0 is failure.
535 ebml_read_master (MatroskaDemuxContext *matroska,
538 ByteIOContext *pb = &matroska->ctx->pb;
540 MatroskaLevel *level;
543 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
544 (res = ebml_read_element_length(matroska, &length)) < 0)
547 /* protect... (Heaven forbids that the '>' is true) */
548 if (matroska->num_levels >= EBML_MAX_DEPTH) {
549 av_log(matroska->ctx, AV_LOG_ERROR,
550 "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
551 return AVERROR_NOTSUPP;
555 level = &matroska->levels[matroska->num_levels++];
556 level->start = url_ftell(pb);
557 level->length = length;
563 * Read the next element as binary data.
564 * 0 is success, < 0 is failure.
568 ebml_read_binary (MatroskaDemuxContext *matroska,
573 ByteIOContext *pb = &matroska->ctx->pb;
577 if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 ||
578 (res = ebml_read_element_length(matroska, &rlength)) < 0)
582 if (!(*binary = av_malloc(*size))) {
583 av_log(matroska->ctx, AV_LOG_ERROR,
584 "Memory allocation error\n");
585 return AVERROR_NOMEM;
588 if (get_buffer(pb, *binary, *size) != *size) {
589 offset_t pos = url_ftell(pb);
590 av_log(matroska->ctx, AV_LOG_ERROR,
591 "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos);
599 * Read signed/unsigned "EBML" numbers.
600 * Return: number of bytes processed, < 0 on error.
601 * XXX: use ebml_read_num().
605 matroska_ebmlnum_uint (uint8_t *data,
609 int len_mask = 0x80, read = 1, n = 1, num_ffs = 0;
613 return AVERROR_INVALIDDATA;
616 while (read <= 8 && !(total & len_mask)) {
621 return AVERROR_INVALIDDATA;
623 if ((total &= (len_mask - 1)) == len_mask - 1)
626 return AVERROR_INVALIDDATA;
630 total = (total << 8) | data[n];
643 * Same as above, but signed.
647 matroska_ebmlnum_sint (uint8_t *data,
654 /* read as unsigned number first */
655 if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0)
658 /* make signed (weird way) */
659 if (unum == (uint64_t)-1)
662 *num = unum - ((1LL << ((7 * res) - 1)) - 1);
668 * Read an EBML header.
669 * 0 is success, < 0 is failure.
673 ebml_read_header (MatroskaDemuxContext *matroska,
678 int level_up, res = 0;
686 if (!(id = ebml_peek_id(matroska, &level_up)) ||
687 level_up != 0 || id != EBML_ID_HEADER) {
688 av_log(matroska->ctx, AV_LOG_ERROR,
689 "This is not an EBML file (id=0x%x/0x%x)\n", id, EBML_ID_HEADER);
690 return AVERROR_INVALIDDATA;
692 if ((res = ebml_read_master(matroska, &id)) < 0)
696 if (!(id = ebml_peek_id(matroska, &level_up)))
704 /* is our read version uptodate? */
705 case EBML_ID_EBMLREADVERSION: {
708 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
710 if (num > EBML_VERSION) {
711 av_log(matroska->ctx, AV_LOG_ERROR,
712 "EBML version %"PRIu64" (> %d) is not supported\n",
714 return AVERROR_INVALIDDATA;
719 /* we only handle 8 byte lengths at max */
720 case EBML_ID_EBMLMAXSIZELENGTH: {
723 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
725 if (num > sizeof(uint64_t)) {
726 av_log(matroska->ctx, AV_LOG_ERROR,
727 "Integers of size %"PRIu64" (> %zd) not supported\n",
728 num, sizeof(uint64_t));
729 return AVERROR_INVALIDDATA;
734 /* we handle 4 byte IDs at max */
735 case EBML_ID_EBMLMAXIDLENGTH: {
738 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
740 if (num > sizeof(uint32_t)) {
741 av_log(matroska->ctx, AV_LOG_ERROR,
742 "IDs of size %"PRIu64" (> %zu) not supported\n",
743 num, sizeof(uint32_t));
744 return AVERROR_INVALIDDATA;
749 case EBML_ID_DOCTYPE: {
752 if ((res = ebml_read_ascii(matroska, &id, &text)) < 0)
763 case EBML_ID_DOCTYPEREADVERSION: {
766 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
774 av_log(matroska->ctx, AV_LOG_INFO,
775 "Unknown data type 0x%x in EBML header", id);
779 /* we ignore these two, as they don't tell us anything we
781 case EBML_ID_EBMLVERSION:
782 case EBML_ID_DOCTYPEVERSION:
783 res = ebml_read_skip (matroska);
793 matroska_find_track_by_num (MatroskaDemuxContext *matroska,
798 for (i = 0; i < matroska->num_tracks; i++)
799 if (matroska->tracks[i]->num == num)
807 * Put one packet in an application-supplied AVPacket struct.
808 * Returns 0 on success or -1 on failure.
812 matroska_deliver_packet (MatroskaDemuxContext *matroska,
815 if (matroska->num_packets > 0) {
816 memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
817 av_free(matroska->packets[0]);
818 if (matroska->num_packets > 1) {
819 memmove(&matroska->packets[0], &matroska->packets[1],
820 (matroska->num_packets - 1) * sizeof(AVPacket *));
822 av_realloc(matroska->packets, (matroska->num_packets - 1) *
825 av_freep(&matroska->packets);
827 matroska->num_packets--;
835 * Put a packet into our internal queue. Will be delivered to the
836 * user/application during the next get_packet() call.
840 matroska_queue_packet (MatroskaDemuxContext *matroska,
844 av_realloc(matroska->packets, (matroska->num_packets + 1) *
846 matroska->packets[matroska->num_packets] = pkt;
847 matroska->num_packets++;
856 matroska_probe (AVProbeData *p)
859 int len_mask = 0x80, size = 1, n = 1;
860 uint8_t probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' };
863 if (AV_RB32(p->buf) != EBML_ID_HEADER)
866 /* length of header */
868 while (size <= 8 && !(total & len_mask)) {
874 total &= (len_mask - 1);
876 total = (total << 8) | p->buf[4 + n++];
878 /* does the probe data contain the whole header? */
879 if (p->buf_size < 4 + size + total)
882 /* the header must contain the document type 'matroska'. For now,
883 * we don't parse the whole header but simply check for the
884 * availability of that array of characters inside the header.
885 * Not fully fool-proof, but good enough. */
886 for (n = 4 + size; n <= 4 + size + total - sizeof(probe_data); n++)
887 if (!memcmp (&p->buf[n], probe_data, sizeof(probe_data)))
888 return AVPROBE_SCORE_MAX;
894 * From here on, it's all XML-style DTD stuff... Needs no comments.
898 matroska_parse_info (MatroskaDemuxContext *matroska)
903 av_log(matroska->ctx, AV_LOG_DEBUG, "Parsing info...\n");
906 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
909 } else if (matroska->level_up) {
910 matroska->level_up--;
915 /* cluster timecode */
916 case MATROSKA_ID_TIMECODESCALE: {
918 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
920 matroska->time_scale = num;
924 case MATROSKA_ID_DURATION: {
926 if ((res = ebml_read_float(matroska, &id, &num)) < 0)
928 matroska->ctx->duration = num * matroska->time_scale * 1000 / AV_TIME_BASE;
932 case MATROSKA_ID_TITLE: {
934 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
936 strncpy(matroska->ctx->title, text,
937 sizeof(matroska->ctx->title)-1);
942 case MATROSKA_ID_WRITINGAPP: {
944 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
946 matroska->writing_app = text;
950 case MATROSKA_ID_MUXINGAPP: {
952 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
954 matroska->muxing_app = text;
958 case MATROSKA_ID_DATEUTC: {
960 if ((res = ebml_read_date(matroska, &id, &time)) < 0)
962 matroska->created = time;
967 av_log(matroska->ctx, AV_LOG_INFO,
968 "Unknown entry 0x%x in info header\n", id);
972 res = ebml_read_skip(matroska);
976 if (matroska->level_up) {
977 matroska->level_up--;
986 matroska_add_stream (MatroskaDemuxContext *matroska)
990 MatroskaTrack *track;
992 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing track, adding stream..,\n");
994 /* Allocate a generic track. As soon as we know its type we'll realloc. */
995 track = av_mallocz(MAX_TRACK_SIZE);
996 matroska->num_tracks++;
997 strcpy(track->language, "eng");
999 /* start with the master */
1000 if ((res = ebml_read_master(matroska, &id)) < 0)
1003 /* try reading the trackentry headers */
1005 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1008 } else if (matroska->level_up > 0) {
1009 matroska->level_up--;
1014 /* track number (unique stream ID) */
1015 case MATROSKA_ID_TRACKNUMBER: {
1017 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1023 /* track UID (unique identifier) */
1024 case MATROSKA_ID_TRACKUID: {
1026 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1032 /* track type (video, audio, combined, subtitle, etc.) */
1033 case MATROSKA_ID_TRACKTYPE: {
1035 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1037 if (track->type && track->type != num) {
1038 av_log(matroska->ctx, AV_LOG_INFO,
1039 "More than one tracktype in an entry - skip\n");
1044 switch (track->type) {
1045 case MATROSKA_TRACK_TYPE_VIDEO:
1046 case MATROSKA_TRACK_TYPE_AUDIO:
1047 case MATROSKA_TRACK_TYPE_SUBTITLE:
1049 case MATROSKA_TRACK_TYPE_COMPLEX:
1050 case MATROSKA_TRACK_TYPE_LOGO:
1051 case MATROSKA_TRACK_TYPE_CONTROL:
1053 av_log(matroska->ctx, AV_LOG_INFO,
1054 "Unknown or unsupported track type 0x%x\n",
1059 matroska->tracks[matroska->num_tracks - 1] = track;
1063 /* tracktype specific stuff for video */
1064 case MATROSKA_ID_TRACKVIDEO: {
1065 MatroskaVideoTrack *videotrack;
1067 track->type = MATROSKA_TRACK_TYPE_VIDEO;
1068 if (track->type != MATROSKA_TRACK_TYPE_VIDEO) {
1069 av_log(matroska->ctx, AV_LOG_INFO,
1070 "video data in non-video track - ignoring\n");
1071 res = AVERROR_INVALIDDATA;
1073 } else if ((res = ebml_read_master(matroska, &id)) < 0)
1075 videotrack = (MatroskaVideoTrack *)track;
1078 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1081 } else if (matroska->level_up > 0) {
1082 matroska->level_up--;
1087 /* fixme, this should be one-up, but I get it here */
1088 case MATROSKA_ID_TRACKDEFAULTDURATION: {
1090 if ((res = ebml_read_uint (matroska, &id,
1093 track->default_duration = num/matroska->time_scale;
1097 /* video framerate */
1098 case MATROSKA_ID_VIDEOFRAMERATE: {
1100 if ((res = ebml_read_float(matroska, &id,
1103 track->default_duration = 1000000000/(matroska->time_scale*num);
1107 /* width of the size to display the video at */
1108 case MATROSKA_ID_VIDEODISPLAYWIDTH: {
1110 if ((res = ebml_read_uint(matroska, &id,
1113 videotrack->display_width = num;
1117 /* height of the size to display the video at */
1118 case MATROSKA_ID_VIDEODISPLAYHEIGHT: {
1120 if ((res = ebml_read_uint(matroska, &id,
1123 videotrack->display_height = num;
1127 /* width of the video in the file */
1128 case MATROSKA_ID_VIDEOPIXELWIDTH: {
1130 if ((res = ebml_read_uint(matroska, &id,
1133 videotrack->pixel_width = num;
1137 /* height of the video in the file */
1138 case MATROSKA_ID_VIDEOPIXELHEIGHT: {
1140 if ((res = ebml_read_uint(matroska, &id,
1143 videotrack->pixel_height = num;
1147 /* whether the video is interlaced */
1148 case MATROSKA_ID_VIDEOFLAGINTERLACED: {
1150 if ((res = ebml_read_uint(matroska, &id,
1155 MATROSKA_VIDEOTRACK_INTERLACED;
1158 ~MATROSKA_VIDEOTRACK_INTERLACED;
1162 /* stereo mode (whether the video has two streams,
1163 * where one is for the left eye and the other for
1164 * the right eye, which creates a 3D-like
1166 case MATROSKA_ID_VIDEOSTEREOMODE: {
1168 if ((res = ebml_read_uint(matroska, &id,
1171 if (num != MATROSKA_EYE_MODE_MONO &&
1172 num != MATROSKA_EYE_MODE_LEFT &&
1173 num != MATROSKA_EYE_MODE_RIGHT &&
1174 num != MATROSKA_EYE_MODE_BOTH) {
1175 av_log(matroska->ctx, AV_LOG_INFO,
1176 "Ignoring unknown eye mode 0x%x\n",
1180 videotrack->eye_mode = num;
1184 /* aspect ratio behaviour */
1185 case MATROSKA_ID_VIDEOASPECTRATIO: {
1187 if ((res = ebml_read_uint(matroska, &id,
1190 if (num != MATROSKA_ASPECT_RATIO_MODE_FREE &&
1191 num != MATROSKA_ASPECT_RATIO_MODE_KEEP &&
1192 num != MATROSKA_ASPECT_RATIO_MODE_FIXED) {
1193 av_log(matroska->ctx, AV_LOG_INFO,
1194 "Ignoring unknown aspect ratio 0x%x\n",
1198 videotrack->ar_mode = num;
1202 /* colourspace (only matters for raw video)
1204 case MATROSKA_ID_VIDEOCOLOURSPACE: {
1206 if ((res = ebml_read_uint(matroska, &id,
1209 videotrack->fourcc = num;
1214 av_log(matroska->ctx, AV_LOG_INFO,
1215 "Unknown video track header entry "
1216 "0x%x - ignoring\n", id);
1220 res = ebml_read_skip(matroska);
1224 if (matroska->level_up) {
1225 matroska->level_up--;
1232 /* tracktype specific stuff for audio */
1233 case MATROSKA_ID_TRACKAUDIO: {
1234 MatroskaAudioTrack *audiotrack;
1236 track->type = MATROSKA_TRACK_TYPE_AUDIO;
1237 if (track->type != MATROSKA_TRACK_TYPE_AUDIO) {
1238 av_log(matroska->ctx, AV_LOG_INFO,
1239 "audio data in non-audio track - ignoring\n");
1240 res = AVERROR_INVALIDDATA;
1242 } else if ((res = ebml_read_master(matroska, &id)) < 0)
1244 audiotrack = (MatroskaAudioTrack *)track;
1245 audiotrack->channels = 1;
1246 audiotrack->samplerate = 8000;
1249 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1252 } else if (matroska->level_up > 0) {
1253 matroska->level_up--;
1259 case MATROSKA_ID_AUDIOSAMPLINGFREQ: {
1261 if ((res = ebml_read_float(matroska, &id,
1264 audiotrack->internal_samplerate =
1265 audiotrack->samplerate = num;
1269 case MATROSKA_ID_AUDIOOUTSAMPLINGFREQ: {
1271 if ((res = ebml_read_float(matroska, &id,
1274 audiotrack->samplerate = num;
1279 case MATROSKA_ID_AUDIOBITDEPTH: {
1281 if ((res = ebml_read_uint(matroska, &id,
1284 audiotrack->bitdepth = num;
1289 case MATROSKA_ID_AUDIOCHANNELS: {
1291 if ((res = ebml_read_uint(matroska, &id,
1294 audiotrack->channels = num;
1299 av_log(matroska->ctx, AV_LOG_INFO,
1300 "Unknown audio track header entry "
1301 "0x%x - ignoring\n", id);
1305 res = ebml_read_skip(matroska);
1309 if (matroska->level_up) {
1310 matroska->level_up--;
1317 /* codec identifier */
1318 case MATROSKA_ID_CODECID: {
1320 if ((res = ebml_read_ascii(matroska, &id, &text)) < 0)
1322 track->codec_id = text;
1326 /* codec private data */
1327 case MATROSKA_ID_CODECPRIVATE: {
1330 if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0))
1332 track->codec_priv = data;
1333 track->codec_priv_size = size;
1337 /* name of the codec */
1338 case MATROSKA_ID_CODECNAME: {
1340 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1342 track->codec_name = text;
1346 /* name of this track */
1347 case MATROSKA_ID_TRACKNAME: {
1349 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1355 /* language (matters for audio/subtitles, mostly) */
1356 case MATROSKA_ID_TRACKLANGUAGE: {
1358 if ((res = ebml_read_utf8(matroska, &id, &text)) < 0)
1360 if ((end = strchr(text, '-')))
1362 if (strlen(text) == 3)
1363 strcpy(track->language, text);
1368 /* whether this is actually used */
1369 case MATROSKA_ID_TRACKFLAGENABLED: {
1371 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1374 track->flags |= MATROSKA_TRACK_ENABLED;
1376 track->flags &= ~MATROSKA_TRACK_ENABLED;
1380 /* whether it's the default for this track type */
1381 case MATROSKA_ID_TRACKFLAGDEFAULT: {
1383 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1386 track->flags |= MATROSKA_TRACK_DEFAULT;
1388 track->flags &= ~MATROSKA_TRACK_DEFAULT;
1392 /* lacing (like MPEG, where blocks don't end/start on frame
1394 case MATROSKA_ID_TRACKFLAGLACING: {
1396 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1399 track->flags |= MATROSKA_TRACK_LACING;
1401 track->flags &= ~MATROSKA_TRACK_LACING;
1405 /* default length (in time) of one data block in this track */
1406 case MATROSKA_ID_TRACKDEFAULTDURATION: {
1408 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
1410 track->default_duration = num / matroska->time_scale;
1415 av_log(matroska->ctx, AV_LOG_INFO,
1416 "Unknown track header entry 0x%x - ignoring\n", id);
1420 /* we ignore these because they're nothing useful. */
1421 case MATROSKA_ID_CODECINFOURL:
1422 case MATROSKA_ID_CODECDOWNLOADURL:
1423 case MATROSKA_ID_TRACKMINCACHE:
1424 case MATROSKA_ID_TRACKMAXCACHE:
1425 res = ebml_read_skip(matroska);
1429 if (matroska->level_up) {
1430 matroska->level_up--;
1439 matroska_parse_tracks (MatroskaDemuxContext *matroska)
1444 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing tracks...\n");
1447 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1450 } else if (matroska->level_up) {
1451 matroska->level_up--;
1456 /* one track within the "all-tracks" header */
1457 case MATROSKA_ID_TRACKENTRY:
1458 res = matroska_add_stream(matroska);
1462 av_log(matroska->ctx, AV_LOG_INFO,
1463 "Unknown entry 0x%x in track header\n", id);
1467 res = ebml_read_skip(matroska);
1471 if (matroska->level_up) {
1472 matroska->level_up--;
1481 matroska_parse_index (MatroskaDemuxContext *matroska)
1485 MatroskaDemuxIndex idx;
1487 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing index...\n");
1490 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1493 } else if (matroska->level_up) {
1494 matroska->level_up--;
1499 /* one single index entry ('point') */
1500 case MATROSKA_ID_POINTENTRY:
1501 if ((res = ebml_read_master(matroska, &id)) < 0)
1504 /* in the end, we hope to fill one entry with a
1505 * timestamp, a file position and a tracknum */
1506 idx.pos = (uint64_t) -1;
1507 idx.time = (uint64_t) -1;
1508 idx.track = (uint16_t) -1;
1511 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1514 } else if (matroska->level_up) {
1515 matroska->level_up--;
1520 /* one single index entry ('point') */
1521 case MATROSKA_ID_CUETIME: {
1523 if ((res = ebml_read_uint(matroska, &id,
1526 idx.time = time * matroska->time_scale;
1530 /* position in the file + track to which it
1532 case MATROSKA_ID_CUETRACKPOSITION:
1533 if ((res = ebml_read_master(matroska, &id)) < 0)
1537 if (!(id = ebml_peek_id (matroska,
1538 &matroska->level_up))) {
1541 } else if (matroska->level_up) {
1542 matroska->level_up--;
1548 case MATROSKA_ID_CUETRACK: {
1550 if ((res = ebml_read_uint(matroska,
1557 /* position in file */
1558 case MATROSKA_ID_CUECLUSTERPOSITION: {
1560 if ((res = ebml_read_uint(matroska,
1563 idx.pos = num+matroska->segment_start;
1568 av_log(matroska->ctx, AV_LOG_INFO,
1569 "Unknown entry 0x%x in "
1570 "CuesTrackPositions\n", id);
1574 res = ebml_read_skip(matroska);
1578 if (matroska->level_up) {
1579 matroska->level_up--;
1587 av_log(matroska->ctx, AV_LOG_INFO,
1588 "Unknown entry 0x%x in cuespoint "
1593 res = ebml_read_skip(matroska);
1597 if (matroska->level_up) {
1598 matroska->level_up--;
1603 /* so let's see if we got what we wanted */
1604 if (idx.pos != (uint64_t) -1 &&
1605 idx.time != (uint64_t) -1 &&
1606 idx.track != (uint16_t) -1) {
1607 if (matroska->num_indexes % 32 == 0) {
1608 /* re-allocate bigger index */
1610 av_realloc(matroska->index,
1611 (matroska->num_indexes + 32) *
1612 sizeof(MatroskaDemuxIndex));
1614 matroska->index[matroska->num_indexes] = idx;
1615 matroska->num_indexes++;
1620 av_log(matroska->ctx, AV_LOG_INFO,
1621 "Unknown entry 0x%x in cues header\n", id);
1625 res = ebml_read_skip(matroska);
1629 if (matroska->level_up) {
1630 matroska->level_up--;
1639 matroska_parse_metadata (MatroskaDemuxContext *matroska)
1645 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1648 } else if (matroska->level_up) {
1649 matroska->level_up--;
1654 /* Hm, this is unsupported... */
1656 av_log(matroska->ctx, AV_LOG_INFO,
1657 "Unknown entry 0x%x in metadata header\n", id);
1661 res = ebml_read_skip(matroska);
1665 if (matroska->level_up) {
1666 matroska->level_up--;
1675 matroska_parse_seekhead (MatroskaDemuxContext *matroska)
1680 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing seekhead...\n");
1683 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1686 } else if (matroska->level_up) {
1687 matroska->level_up--;
1692 case MATROSKA_ID_SEEKENTRY: {
1693 uint32_t seek_id = 0, peek_id_cache = 0;
1694 uint64_t seek_pos = (uint64_t) -1, t;
1696 if ((res = ebml_read_master(matroska, &id)) < 0)
1700 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1703 } else if (matroska->level_up) {
1704 matroska->level_up--;
1709 case MATROSKA_ID_SEEKID:
1710 res = ebml_read_uint(matroska, &id, &t);
1714 case MATROSKA_ID_SEEKPOSITION:
1715 res = ebml_read_uint(matroska, &id, &seek_pos);
1719 av_log(matroska->ctx, AV_LOG_INFO,
1720 "Unknown seekhead ID 0x%x\n", id);
1724 res = ebml_read_skip(matroska);
1728 if (matroska->level_up) {
1729 matroska->level_up--;
1734 if (!seek_id || seek_pos == (uint64_t) -1) {
1735 av_log(matroska->ctx, AV_LOG_INFO,
1736 "Incomplete seekhead entry (0x%x/%"PRIu64")\n",
1742 case MATROSKA_ID_CUES:
1743 case MATROSKA_ID_TAGS: {
1744 uint32_t level_up = matroska->level_up;
1745 offset_t before_pos;
1747 MatroskaLevel level;
1749 /* remember the peeked ID and the current position */
1750 peek_id_cache = matroska->peek_id;
1751 before_pos = url_ftell(&matroska->ctx->pb);
1754 if ((res = ebml_read_seek(matroska, seek_pos +
1755 matroska->segment_start)) < 0)
1758 /* we don't want to lose our seekhead level, so we add
1759 * a dummy. This is a crude hack. */
1760 if (matroska->num_levels == EBML_MAX_DEPTH) {
1761 av_log(matroska->ctx, AV_LOG_INFO,
1762 "Max EBML element depth (%d) reached, "
1763 "cannot parse further.\n", EBML_MAX_DEPTH);
1764 return AVERROR_UNKNOWN;
1768 level.length = (uint64_t)-1;
1769 matroska->levels[matroska->num_levels] = level;
1770 matroska->num_levels++;
1773 if (!(id = ebml_peek_id (matroska,
1774 &matroska->level_up)))
1776 if (id != seek_id) {
1777 av_log(matroska->ctx, AV_LOG_INFO,
1778 "We looked for ID=0x%x but got "
1779 "ID=0x%x (pos=%"PRIu64")",
1780 seek_id, id, seek_pos +
1781 matroska->segment_start);
1785 /* read master + parse */
1786 if ((res = ebml_read_master(matroska, &id)) < 0)
1789 case MATROSKA_ID_CUES:
1790 if (!(res = matroska_parse_index(matroska)) ||
1791 url_feof(&matroska->ctx->pb)) {
1792 matroska->index_parsed = 1;
1796 case MATROSKA_ID_TAGS:
1797 if (!(res = matroska_parse_metadata(matroska)) ||
1798 url_feof(&matroska->ctx->pb)) {
1799 matroska->metadata_parsed = 1;
1806 /* remove dummy level */
1807 while (matroska->num_levels) {
1808 matroska->num_levels--;
1810 matroska->levels[matroska->num_levels].length;
1811 if (length == (uint64_t)-1)
1816 if ((res = ebml_read_seek(matroska, before_pos)) < 0)
1818 matroska->peek_id = peek_id_cache;
1819 matroska->level_up = level_up;
1824 av_log(matroska->ctx, AV_LOG_INFO,
1825 "Ignoring seekhead entry for ID=0x%x\n",
1834 av_log(matroska->ctx, AV_LOG_INFO,
1835 "Unknown seekhead ID 0x%x\n", id);
1839 res = ebml_read_skip(matroska);
1843 if (matroska->level_up) {
1844 matroska->level_up--;
1852 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x))
1855 matroska_aac_profile (char *codec_id)
1857 static const char *aac_profiles[] = {
1862 for (profile=0; profile<ARRAY_SIZE(aac_profiles); profile++)
1863 if (strstr(codec_id, aac_profiles[profile]))
1869 matroska_aac_sri (int samplerate)
1871 static const int aac_sample_rates[] = {
1872 96000, 88200, 64000, 48000, 44100, 32000,
1873 24000, 22050, 16000, 12000, 11025, 8000,
1877 for (sri=0; sri<ARRAY_SIZE(aac_sample_rates); sri++)
1878 if (aac_sample_rates[sri] == samplerate)
1884 matroska_read_header (AVFormatContext *s,
1885 AVFormatParameters *ap)
1887 MatroskaDemuxContext *matroska = s->priv_data;
1889 int version, last_level, res = 0;
1894 /* First read the EBML header. */
1896 if ((res = ebml_read_header(matroska, &doctype, &version)) < 0)
1898 if ((doctype == NULL) || strcmp(doctype, "matroska")) {
1899 av_log(matroska->ctx, AV_LOG_ERROR,
1900 "Wrong EBML doctype ('%s' != 'matroska').\n",
1901 doctype ? doctype : "(none)");
1904 return AVERROR_NOFMT;
1908 av_log(matroska->ctx, AV_LOG_ERROR,
1909 "Matroska demuxer version 2 too old for file version %d\n",
1911 return AVERROR_NOFMT;
1914 /* The next thing is a segment. */
1916 if (!(id = ebml_peek_id(matroska, &last_level)))
1918 if (id == MATROSKA_ID_SEGMENT)
1922 av_log(matroska->ctx, AV_LOG_INFO,
1923 "Expected a Segment ID (0x%x), but received 0x%x!\n",
1924 MATROSKA_ID_SEGMENT, id);
1925 if ((res = ebml_read_skip(matroska)) < 0)
1929 /* We now have a Matroska segment.
1930 * Seeks are from the beginning of the segment,
1931 * after the segment ID/length. */
1932 if ((res = ebml_read_master(matroska, &id)) < 0)
1934 matroska->segment_start = url_ftell(&s->pb);
1936 matroska->time_scale = 1000000;
1937 /* we've found our segment, start reading the different contents in here */
1939 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
1942 } else if (matroska->level_up) {
1943 matroska->level_up--;
1949 case MATROSKA_ID_INFO: {
1950 if ((res = ebml_read_master(matroska, &id)) < 0)
1952 res = matroska_parse_info(matroska);
1956 /* track info headers */
1957 case MATROSKA_ID_TRACKS: {
1958 if ((res = ebml_read_master(matroska, &id)) < 0)
1960 res = matroska_parse_tracks(matroska);
1965 case MATROSKA_ID_CUES: {
1966 if (!matroska->index_parsed) {
1967 if ((res = ebml_read_master(matroska, &id)) < 0)
1969 res = matroska_parse_index(matroska);
1971 res = ebml_read_skip(matroska);
1976 case MATROSKA_ID_TAGS: {
1977 if (!matroska->metadata_parsed) {
1978 if ((res = ebml_read_master(matroska, &id)) < 0)
1980 res = matroska_parse_metadata(matroska);
1982 res = ebml_read_skip(matroska);
1986 /* file index (if seekable, seek to Cues/Tags to parse it) */
1987 case MATROSKA_ID_SEEKHEAD: {
1988 if ((res = ebml_read_master(matroska, &id)) < 0)
1990 res = matroska_parse_seekhead(matroska);
1994 case MATROSKA_ID_CLUSTER: {
1995 /* Do not read the master - this will be done in the next
1996 * call to matroska_read_packet. */
2002 av_log(matroska->ctx, AV_LOG_INFO,
2003 "Unknown matroska file header ID 0x%x\n", id);
2007 res = ebml_read_skip(matroska);
2011 if (matroska->level_up) {
2012 matroska->level_up--;
2017 /* Have we found a cluster? */
2018 if (ebml_peek_id(matroska, NULL) == MATROSKA_ID_CLUSTER) {
2020 MatroskaTrack *track;
2023 for (i = 0; i < matroska->num_tracks; i++) {
2024 enum CodecID codec_id = CODEC_ID_NONE;
2025 uint8_t *extradata = NULL;
2026 int extradata_size = 0;
2027 int extradata_offset = 0;
2028 track = matroska->tracks[i];
2029 track->stream_index = -1;
2031 /* libavformat does not really support subtitles.
2032 * Also apply some sanity checks. */
2033 if ((track->type == MATROSKA_TRACK_TYPE_SUBTITLE) ||
2034 (track->codec_id == NULL))
2037 for(j=0; ff_mkv_codec_tags[j].str; j++){
2038 if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
2039 strlen(ff_mkv_codec_tags[j].str))){
2040 codec_id= ff_mkv_codec_tags[j].id;
2045 /* Set the FourCC from the CodecID. */
2046 /* This is the MS compatibility mode which stores a
2047 * BITMAPINFOHEADER in the CodecPrivate. */
2048 if (!strcmp(track->codec_id,
2049 MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC) &&
2050 (track->codec_priv_size >= 40) &&
2051 (track->codec_priv != NULL)) {
2052 MatroskaVideoTrack *vtrack = (MatroskaVideoTrack *) track;
2054 /* Offset of biCompression. Stored in LE. */
2055 vtrack->fourcc = AV_RL32(track->codec_priv + 16);
2056 codec_id = codec_get_id(codec_bmp_tags, vtrack->fourcc);
2060 /* This is the MS compatibility mode which stores a
2061 * WAVEFORMATEX in the CodecPrivate. */
2062 else if (!strcmp(track->codec_id,
2063 MATROSKA_CODEC_ID_AUDIO_ACM) &&
2064 (track->codec_priv_size >= 18) &&
2065 (track->codec_priv != NULL)) {
2068 /* Offset of wFormatTag. Stored in LE. */
2069 tag = AV_RL16(track->codec_priv);
2070 codec_id = codec_get_id(codec_wav_tags, tag);
2074 else if (codec_id == CODEC_ID_AAC && !track->codec_priv_size) {
2075 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track;
2076 int profile = matroska_aac_profile(track->codec_id);
2077 int sri = matroska_aac_sri(audiotrack->internal_samplerate);
2078 extradata = av_malloc(5);
2079 if (extradata == NULL)
2080 return AVERROR_NOMEM;
2081 extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
2082 extradata[1] = ((sri&0x01) << 7) | (audiotrack->channels<<3);
2083 if (strstr(track->codec_id, "SBR")) {
2084 sri = matroska_aac_sri(audiotrack->samplerate);
2085 extradata[2] = 0x56;
2086 extradata[3] = 0xE5;
2087 extradata[4] = 0x80 | (sri<<3);
2092 track->default_duration = 1024*1000 / audiotrack->internal_samplerate;
2095 else if (codec_id == CODEC_ID_TTA) {
2096 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track;
2098 extradata_size = 30;
2099 extradata = av_mallocz(extradata_size);
2100 if (extradata == NULL)
2101 return AVERROR_NOMEM;
2102 init_put_byte(&b, extradata, extradata_size, 1,
2103 NULL, NULL, NULL, NULL);
2104 put_buffer(&b, (uint8_t *) "TTA1", 4);
2106 put_le16(&b, audiotrack->channels);
2107 put_le16(&b, audiotrack->bitdepth);
2108 put_le32(&b, audiotrack->samplerate);
2109 put_le32(&b, matroska->ctx->duration * audiotrack->samplerate);
2112 else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
2113 codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
2114 extradata_offset = 26;
2115 track->codec_priv_size -= extradata_offset;
2116 track->flags |= MATROSKA_TRACK_REAL_V;
2119 else if (codec_id == CODEC_ID_RA_144) {
2120 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track;
2121 audiotrack->samplerate = 8000;
2122 audiotrack->channels = 1;
2125 else if (codec_id == CODEC_ID_RA_288 ||
2126 codec_id == CODEC_ID_COOK ||
2127 codec_id == CODEC_ID_ATRAC3) {
2128 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track;
2131 init_put_byte(&b, track->codec_priv, track->codec_priv_size, 0,
2132 NULL, NULL, NULL, NULL);
2134 audiotrack->coded_framesize = get_be32(&b);
2136 audiotrack->sub_packet_h = get_be16(&b);
2137 audiotrack->frame_size = get_be16(&b);
2138 audiotrack->sub_packet_size = get_be16(&b);
2139 audiotrack->buf = av_malloc(audiotrack->frame_size * audiotrack->sub_packet_h);
2140 if (codec_id == CODEC_ID_RA_288) {
2141 audiotrack->block_align = audiotrack->coded_framesize;
2142 track->codec_priv_size = 0;
2144 audiotrack->block_align = audiotrack->sub_packet_size;
2145 extradata_offset = 78;
2146 track->codec_priv_size -= extradata_offset;
2150 if (codec_id == CODEC_ID_NONE) {
2151 av_log(matroska->ctx, AV_LOG_INFO,
2152 "Unknown/unsupported CodecID %s.\n",
2156 track->stream_index = matroska->num_streams;
2158 matroska->num_streams++;
2159 st = av_new_stream(s, track->stream_index);
2161 return AVERROR_NOMEM;
2162 av_set_pts_info(st, 64, matroska->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
2164 st->codec->codec_id = codec_id;
2166 if (strcmp(track->language, "und"))
2167 strcpy(st->language, track->language);
2169 if (track->default_duration)
2170 av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
2171 track->default_duration, 1000, 30000);
2174 st->codec->extradata = extradata;
2175 st->codec->extradata_size = extradata_size;
2176 } else if(track->codec_priv && track->codec_priv_size > 0){
2177 st->codec->extradata = av_malloc(track->codec_priv_size);
2178 if(st->codec->extradata == NULL)
2179 return AVERROR_NOMEM;
2180 st->codec->extradata_size = track->codec_priv_size;
2181 memcpy(st->codec->extradata,track->codec_priv+extradata_offset,
2182 track->codec_priv_size);
2185 if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
2186 MatroskaVideoTrack *videotrack = (MatroskaVideoTrack *)track;
2188 st->codec->codec_type = CODEC_TYPE_VIDEO;
2189 st->codec->codec_tag = videotrack->fourcc;
2190 st->codec->width = videotrack->pixel_width;
2191 st->codec->height = videotrack->pixel_height;
2192 if (videotrack->display_width == 0)
2193 videotrack->display_width= videotrack->pixel_width;
2194 if (videotrack->display_height == 0)
2195 videotrack->display_height= videotrack->pixel_height;
2196 av_reduce(&st->codec->sample_aspect_ratio.num,
2197 &st->codec->sample_aspect_ratio.den,
2198 st->codec->height * videotrack->display_width,
2199 st->codec-> width * videotrack->display_height,
2201 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2202 } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2203 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track;
2205 st->codec->codec_type = CODEC_TYPE_AUDIO;
2206 st->codec->sample_rate = audiotrack->samplerate;
2207 st->codec->channels = audiotrack->channels;
2208 st->codec->block_align = audiotrack->block_align;
2209 } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
2210 st->codec->codec_type = CODEC_TYPE_SUBTITLE;
2213 /* What do we do with private data? E.g. for Vorbis. */
2218 if (matroska->index_parsed) {
2219 int i, track, stream;
2220 for (i=0; i<matroska->num_indexes; i++) {
2221 MatroskaDemuxIndex *idx = &matroska->index[i];
2222 track = matroska_find_track_by_num(matroska, idx->track);
2223 stream = matroska->tracks[track]->stream_index;
2225 av_add_index_entry(matroska->ctx->streams[stream],
2226 idx->pos, idx->time/matroska->time_scale,
2227 0, 0, AVINDEX_KEYFRAME);
2235 rv_offset(uint8_t *data, int slice, int slices)
2237 return AV_RL32(data+8*slice+4) + 8*slices;
2241 matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size,
2242 int64_t pos, uint64_t cluster_time, uint64_t duration,
2243 int is_keyframe, int is_bframe)
2249 uint8_t *origdata = data;
2251 uint32_t *lace_size = NULL;
2252 int n, flags, laces = 0;
2255 /* first byte(s): tracknum */
2256 if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) {
2257 av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
2264 /* fetch track from num */
2265 track = matroska_find_track_by_num(matroska, num);
2266 if (size <= 3 || track < 0 || track >= matroska->num_tracks) {
2267 av_log(matroska->ctx, AV_LOG_INFO,
2268 "Invalid stream %d or size %u\n", track, size);
2272 if (matroska->tracks[track]->stream_index < 0)
2274 st = matroska->ctx->streams[matroska->tracks[track]->stream_index];
2275 if (st->discard >= AVDISCARD_ALL) {
2279 if (duration == AV_NOPTS_VALUE)
2280 duration = matroska->tracks[track]->default_duration;
2282 /* block_time (relative to cluster time) */
2283 block_time = AV_RB16(data);
2287 if (is_keyframe == -1)
2288 is_keyframe = flags & 1 ? PKT_FLAG_KEY : 0;
2290 if (matroska->skip_to_keyframe) {
2291 if (!is_keyframe || st != matroska->skip_to_stream)
2293 matroska->skip_to_keyframe = 0;
2296 switch ((flags & 0x06) >> 1) {
2297 case 0x0: /* no lacing */
2299 lace_size = av_mallocz(sizeof(int));
2300 lace_size[0] = size;
2303 case 0x1: /* xiph lacing */
2304 case 0x2: /* fixed-size lacing */
2305 case 0x3: /* EBML lacing */
2310 laces = (*data) + 1;
2313 lace_size = av_mallocz(laces * sizeof(int));
2315 switch ((flags & 0x06) >> 1) {
2316 case 0x1: /* xiph lacing */ {
2319 for (n = 0; res == 0 && n < laces - 1; n++) {
2326 lace_size[n] += temp;
2332 total += lace_size[n];
2334 lace_size[n] = size - total;
2338 case 0x2: /* fixed-size lacing */
2339 for (n = 0; n < laces; n++)
2340 lace_size[n] = size / laces;
2343 case 0x3: /* EBML lacing */ {
2345 n = matroska_ebmlnum_uint(data, size, &num);
2347 av_log(matroska->ctx, AV_LOG_INFO,
2348 "EBML block data error\n");
2353 total = lace_size[0] = num;
2354 for (n = 1; res == 0 && n < laces - 1; n++) {
2357 r = matroska_ebmlnum_sint (data, size, &snum);
2359 av_log(matroska->ctx, AV_LOG_INFO,
2360 "EBML block data error\n");
2365 lace_size[n] = lace_size[n - 1] + snum;
2366 total += lace_size[n];
2368 lace_size[n] = size - total;
2376 int real_v = matroska->tracks[track]->flags & MATROSKA_TRACK_REAL_V;
2377 uint64_t timecode = AV_NOPTS_VALUE;
2379 if (cluster_time != (uint64_t)-1 && cluster_time + block_time >= 0)
2380 timecode = cluster_time + block_time;
2382 for (n = 0; n < laces; n++) {
2383 int slice, slices = 1;
2386 slices = *data++ + 1;
2390 for (slice=0; slice<slices; slice++) {
2391 int slice_size, slice_offset = 0;
2393 slice_offset = rv_offset(data, slice, slices);
2394 if (slice+1 == slices)
2395 slice_size = lace_size[n] - slice_offset;
2397 slice_size = rv_offset(data, slice+1, slices) - slice_offset;
2399 if (st->codec->codec_id == CODEC_ID_RA_288 ||
2400 st->codec->codec_id == CODEC_ID_COOK ||
2401 st->codec->codec_id == CODEC_ID_ATRAC3) {
2402 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)matroska->tracks[track];
2403 int a = st->codec->block_align;
2404 int sps = audiotrack->sub_packet_size;
2405 int cfs = audiotrack->coded_framesize;
2406 int h = audiotrack->sub_packet_h;
2407 int y = audiotrack->sub_packet_cnt;
2408 int w = audiotrack->frame_size;
2411 if (!audiotrack->pkt_cnt) {
2412 if (st->codec->codec_id == CODEC_ID_RA_288)
2413 for (x=0; x<h/2; x++)
2414 memcpy(audiotrack->buf+x*2*w+y*cfs,
2417 for (x=0; x<w/sps; x++)
2418 memcpy(audiotrack->buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
2420 if (++audiotrack->sub_packet_cnt >= h) {
2421 audiotrack->sub_packet_cnt = 0;
2422 audiotrack->pkt_cnt = h*w / a;
2425 while (audiotrack->pkt_cnt) {
2426 pkt = av_mallocz(sizeof(AVPacket));
2427 av_new_packet(pkt, a);
2428 memcpy(pkt->data, audiotrack->buf
2429 + a * (h*w / a - audiotrack->pkt_cnt--), a);
2431 pkt->stream_index = matroska->tracks[track]->stream_index;
2432 matroska_queue_packet(matroska, pkt);
2435 pkt = av_mallocz(sizeof(AVPacket));
2436 /* XXX: prevent data copy... */
2437 if (av_new_packet(pkt, slice_size) < 0) {
2438 res = AVERROR_NOMEM;
2442 memcpy (pkt->data, data+slice_offset, slice_size);
2445 pkt->flags = is_keyframe;
2446 pkt->stream_index = matroska->tracks[track]->stream_index;
2448 pkt->pts = timecode;
2450 pkt->duration = duration;
2452 matroska_queue_packet(matroska, pkt);
2455 if (timecode != AV_NOPTS_VALUE)
2456 timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
2458 data += lace_size[n];
2468 matroska_parse_blockgroup (MatroskaDemuxContext *matroska,
2469 uint64_t cluster_time)
2474 int is_keyframe = PKT_FLAG_KEY, last_num_packets = matroska->num_packets;
2475 uint64_t duration = AV_NOPTS_VALUE;
2480 av_log(matroska->ctx, AV_LOG_DEBUG, "parsing blockgroup...\n");
2483 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2486 } else if (matroska->level_up) {
2487 matroska->level_up--;
2492 /* one block inside the group. Note, block parsing is one
2493 * of the harder things, so this code is a bit complicated.
2494 * See http://www.matroska.org/ for documentation. */
2495 case MATROSKA_ID_BLOCK: {
2496 pos = url_ftell(&matroska->ctx->pb);
2497 res = ebml_read_binary(matroska, &id, &data, &size);
2501 case MATROSKA_ID_BLOCKDURATION: {
2502 if ((res = ebml_read_uint(matroska, &id, &duration)) < 0)
2504 duration /= matroska->time_scale;
2508 case MATROSKA_ID_BLOCKREFERENCE: {
2510 /* We've found a reference, so not even the first frame in
2511 * the lace is a key frame. */
2513 if (last_num_packets != matroska->num_packets)
2514 matroska->packets[last_num_packets]->flags = 0;
2515 if ((res = ebml_read_sint(matroska, &id, &num)) < 0)
2523 av_log(matroska->ctx, AV_LOG_INFO,
2524 "Unknown entry 0x%x in blockgroup data\n", id);
2528 res = ebml_read_skip(matroska);
2532 if (matroska->level_up) {
2533 matroska->level_up--;
2542 res = matroska_parse_block(matroska, data, size, pos, cluster_time,
2543 duration, is_keyframe, is_bframe);
2549 matroska_parse_cluster (MatroskaDemuxContext *matroska)
2553 uint64_t cluster_time = 0;
2558 av_log(matroska->ctx, AV_LOG_DEBUG,
2559 "parsing cluster at %"PRId64"\n", url_ftell(&matroska->ctx->pb));
2562 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2565 } else if (matroska->level_up) {
2566 matroska->level_up--;
2571 /* cluster timecode */
2572 case MATROSKA_ID_CLUSTERTIMECODE: {
2574 if ((res = ebml_read_uint(matroska, &id, &num)) < 0)
2580 /* a group of blocks inside a cluster */
2581 case MATROSKA_ID_BLOCKGROUP:
2582 if ((res = ebml_read_master(matroska, &id)) < 0)
2584 res = matroska_parse_blockgroup(matroska, cluster_time);
2587 case MATROSKA_ID_SIMPLEBLOCK:
2588 pos = url_ftell(&matroska->ctx->pb);
2589 res = ebml_read_binary(matroska, &id, &data, &size);
2591 res = matroska_parse_block(matroska, data, size, pos,
2592 cluster_time, AV_NOPTS_VALUE,
2597 av_log(matroska->ctx, AV_LOG_INFO,
2598 "Unknown entry 0x%x in cluster data\n", id);
2602 res = ebml_read_skip(matroska);
2606 if (matroska->level_up) {
2607 matroska->level_up--;
2616 matroska_read_packet (AVFormatContext *s,
2619 MatroskaDemuxContext *matroska = s->priv_data;
2623 /* Read stream until we have a packet queued. */
2624 while (matroska_deliver_packet(matroska, pkt)) {
2626 /* Have we already reached the end? */
2632 if (!(id = ebml_peek_id(matroska, &matroska->level_up))) {
2634 } else if (matroska->level_up) {
2635 matroska->level_up--;
2640 case MATROSKA_ID_CLUSTER:
2641 if ((res = ebml_read_master(matroska, &id)) < 0)
2643 if ((res = matroska_parse_cluster(matroska)) == 0)
2644 res = 1; /* Parsed one cluster, let's get out. */
2649 res = ebml_read_skip(matroska);
2653 if (matroska->level_up) {
2654 matroska->level_up--;
2667 matroska_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp,
2670 MatroskaDemuxContext *matroska = s->priv_data;
2671 AVStream *st = s->streams[stream_index];
2674 /* find index entry */
2675 index = av_index_search_timestamp(st, timestamp, flags);
2680 url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET);
2681 matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
2682 matroska->skip_to_stream = st;
2683 matroska->num_packets = 0;
2684 matroska->peek_id = 0;
2689 matroska_read_close (AVFormatContext *s)
2691 MatroskaDemuxContext *matroska = s->priv_data;
2694 av_free(matroska->writing_app);
2695 av_free(matroska->muxing_app);
2696 av_free(matroska->index);
2698 if (matroska->packets != NULL) {
2699 for (n = 0; n < matroska->num_packets; n++) {
2700 av_free_packet(matroska->packets[n]);
2701 av_free(matroska->packets[n]);
2703 av_free(matroska->packets);
2706 for (n = 0; n < matroska->num_tracks; n++) {
2707 MatroskaTrack *track = matroska->tracks[n];
2708 av_free(track->codec_id);
2709 av_free(track->codec_name);
2710 av_free(track->codec_priv);
2711 av_free(track->name);
2713 if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
2714 MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track;
2715 av_free(audiotrack->buf);
2724 AVInputFormat matroska_demuxer = {
2726 "Matroska file format",
2727 sizeof(MatroskaDemuxContext),
2729 matroska_read_header,
2730 matroska_read_packet,
2731 matroska_read_close,