1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/*
* Copyright (c) 2011 Miroslav Slugeň <Thunder.m@seznam.cz>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "rtpdec_formats.h"
#define RTP_G726_HANDLER(bitrate) \
static int g726_ ## bitrate ##_init(AVFormatContext *s, int st_index, PayloadContext *data) \
{ \
AVStream *stream = s->streams[st_index]; \
AVCodecContext *codec = stream->codec; \
\
codec->bit_rate = bitrate*1000; \
if (codec->sample_rate) \
codec->bits_per_coded_sample = \
av_clip((codec->bit_rate + codec->sample_rate/2) / codec->sample_rate, 2, 5); \
\
return 0; \
} \
\
RTPDynamicProtocolHandler ff_g726_ ## bitrate ## _dynamic_handler = { \
.enc_name = "G726-" #bitrate, \
.codec_type = AVMEDIA_TYPE_AUDIO, \
.codec_id = CODEC_ID_ADPCM_G726, \
.init = g726_ ## bitrate ## _init, \
}
RTP_G726_HANDLER(16);
RTP_G726_HANDLER(24);
RTP_G726_HANDLER(32);
RTP_G726_HANDLER(40);
|
