libavcodec/adx.h

   1 /*
   2  * ADX ADPCM codecs
   3  * Copyright (c) 2001,2003 BERO
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file libavcodec/adx.h
  24  * SEGA CRI adx codecs.
  25  *
  26  * Reference documents:
  27  * http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html
  28  * adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/
  29  */
  30
  31 #ifndef AVCODEC_ADX_H
  32 #define AVCODEC_ADX_H
  33
  34 typedef struct {
  35     int s1,s2;
  36 } PREV;
  37
  38 typedef struct {
  39     PREV prev[2];
  40     int header_parsed;
  41     unsigned char dec_temp[18*2];
  42     int in_temp;
  43 } ADXContext;
  44
  45 #define    BASEVOL   0x4000
  46 #define    SCALE1    0x7298
  47 #define    SCALE2    0x3350
  48
  49 #endif /* AVCODEC_ADX_H */