Libav
g722.c
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1 /*
2  * g722 raw demuxer
3  * Copyright (c) 2010 Martin Storsjo
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "internal.h"
24 #include "rawdec.h"
25 
27 {
28  AVStream *st;
29 
30  st = avformat_new_stream(s, NULL);
31  if (!st)
32  return AVERROR(ENOMEM);
33 
36  st->codec->sample_rate = 16000;
37  st->codec->channels = 1;
38 
41 
42  assert(st->codec->bits_per_coded_sample > 0);
43 
44  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
45  return 0;
46 }
47 
49  .name = "g722",
50  .long_name = NULL_IF_CONFIG_SMALL("raw G.722"),
51  .read_header = g722_read_header,
52  .read_packet = ff_raw_read_partial_packet,
53  .flags = AVFMT_GENERIC_INDEX,
54  .extensions = "g722,722",
55  .raw_codec_id = AV_CODEC_ID_ADPCM_G722,
56 };
static int g722_read_header(AVFormatContext *s)
Definition: g722.c:26
AVInputFormat ff_g722_demuxer
Definition: g722.c:48
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:2821
Format I/O context.
Definition: avformat.h:922
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2518
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2507
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:2043
#define AVERROR(e)
Definition: error.h:43
int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawdec.c:34
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
Stream structure.
Definition: avformat.h:699
NULL
Definition: eval.c:55
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
int sample_rate
samples per second
Definition: avcodec.h:1791
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:417
Main libavformat public API header.
int channels
number of audio channels
Definition: avcodec.h:1792
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525