FFmpeg
mov_esds.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "avformat.h"
20 #include "avio.h"
21 #include "isom.h"
22 
24 {
25  AVStream *st;
26  int tag, ret = 0;
27 
28  if (fc->nb_streams < 1)
29  return 0;
30  st = fc->streams[fc->nb_streams-1];
31 
32  avio_rb32(pb); /* version + flags */
33  ff_mp4_read_descr(fc, pb, &tag);
34  if (tag == MP4ESDescrTag) {
36  } else
37  avio_rb16(pb); /* ID */
38 
39  ff_mp4_read_descr(fc, pb, &tag);
40  if (tag == MP4DecConfigDescrTag)
41  ret = ff_mp4_read_dec_config_descr(fc, st, pb);
42 
43  return ret;
44 }
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
Buffered I/O operations.
#define MP4ESDescrTag
Definition: isom.h:302
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:486
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:788
Format I/O context.
Definition: avformat.h:1358
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:803
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint32_t tag
Definition: movenc.c:1531
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:551
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:511
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
Stream structure.
Definition: avformat.h:881
#define MP4DecConfigDescrTag
Definition: isom.h:303
Main libavformat public API header.
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:477
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
Definition: mov_esds.c:23