libavformat/rtpdec_g726.c

   1 /*
   2  * Copyright (c) 2011 Miroslav Slugeň <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->bits_per_coded_sample = bitrate/8; \
  31     codec->bit_rate = codec->bits_per_coded_sample * codec->sample_rate; \
  32 \
  33     return 0; \
  34 } \
  35 \
  36 RTPDynamicProtocolHandler ff_g726_ ## bitrate ## _dynamic_handler = { \
  37     .enc_name   = "G726-" #bitrate, \
  38     .codec_type = AVMEDIA_TYPE_AUDIO, \
  39     .codec_id   = AV_CODEC_ID_ADPCM_G726, \
  40     .init       = g726_ ## bitrate ## _init, \
  41 }
  42
  43 RTP_G726_HANDLER(16);
  44 RTP_G726_HANDLER(24);
  45 RTP_G726_HANDLER(32);
  46 RTP_G726_HANDLER(40);