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  1. /*
  2.  * Copyright (c) 2011 Miroslav Slugeň <Thunder.m@seznam.cz>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "libavutil/attributes.h"
  22. #include "avformat.h"
  23. #include "rtpdec_formats.h"
  24.  
  25. #define RTP_G726_HANDLER(bitrate) \
  26. static av_cold int g726_ ## bitrate ##_init(AVFormatContext *s, int st_index, \
  27.                                             PayloadContext *data) \
  28. { \
  29.     AVStream *stream = s->streams[st_index]; \
  30.     AVCodecContext *codec = stream->codec; \
  31. \
  32.     codec->bits_per_coded_sample = bitrate/8; \
  33.     codec->bit_rate = codec->bits_per_coded_sample * codec->sample_rate; \
  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   = AV_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);
  49.