rtpdec: Templatize the code for different g726 bitrate variants
[libav.git] / libavformat / rtpdec_g726.c
1 /*
2 * Copyright (c) 2011 Miroslav SlugeĊˆ <Thunder.m@seznam.cz>
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "avformat.h"
22 #include "rtpdec_formats.h"
23
24 #define RTP_G726_HANDLER(bitrate) \
25 static int g726_ ## bitrate ##_init(AVFormatContext *s, int st_index, PayloadContext *data) \
26 { \
27 AVStream *stream = s->streams[st_index]; \
28 AVCodecContext *codec = stream->codec; \
29 \
30 codec->bit_rate = bitrate*1000; \
31 if (codec->sample_rate) \
32 codec->bits_per_coded_sample = \
33 av_clip((codec->bit_rate + codec->sample_rate/2) / codec->sample_rate, 2, 5); \
34 \
35 return 0; \
36 } \
37 \
38 RTPDynamicProtocolHandler ff_g726_ ## bitrate ## _dynamic_handler = { \
39 .enc_name = "G726-" #bitrate, \
40 .codec_type = AVMEDIA_TYPE_AUDIO, \
41 .codec_id = CODEC_ID_ADPCM_G726, \
42 .init = g726_ ## bitrate ## _init, \
43 }
44
45 RTP_G726_HANDLER(16);
46 RTP_G726_HANDLER(24);
47 RTP_G726_HANDLER(32);
48 RTP_G726_HANDLER(40);