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g722.c
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1 /*
2  * g722 raw demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "avformat.h"
24 #include "internal.h"
25 #include "rawdec.h"
26 
28 {
29  AVStream *st;
30 
31  st = avformat_new_stream(s, NULL);
32  if (!st)
33  return AVERROR(ENOMEM);
34 
37  st->codec->sample_rate = 16000;
38  st->codec->channels = 1;
39 
42 
44 
45  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
46  return 0;
47 }
48 
50  .name = "g722",
51  .long_name = NULL_IF_CONFIG_SMALL("raw G.722"),
52  .read_header = g722_read_header,
53  .read_packet = ff_raw_read_partial_packet,
54  .flags = AVFMT_GENERIC_INDEX,
55  .extensions = "g722,722",
56  .raw_codec_id = AV_CODEC_ID_ADPCM_G722,
57 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static int g722_read_header(AVFormatContext *s)
Definition: g722.c:27
AVInputFormat ff_g722_demuxer
Definition: g722.c:49
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4149
Format I/O context.
Definition: avformat.h:1314
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2917
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3007
#define AVERROR(e)
Definition: error.h:43
int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawdec.c:35
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
simple assert() macros that are a bit more flexible than ISO C assert().
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
Stream structure.
Definition: avformat.h:877
enum AVMediaType codec_type
Definition: avcodec.h:1540
enum AVCodecID codec_id
Definition: avcodec.h:1549
int sample_rate
samples per second
Definition: avcodec.h:2287
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:486
Main libavformat public API header.
int channels
number of audio channels
Definition: avcodec.h:2288
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661