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libavcodec/adx.h

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00001 /*
00002  * ADX ADPCM codecs
00003  * Copyright (c) 2001,2003 BERO
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00031 #ifndef AVCODEC_ADX_H
00032 #define AVCODEC_ADX_H
00033 
00034 typedef struct {
00035     int s1,s2;
00036 } PREV;
00037 
00038 typedef struct {
00039     PREV prev[2];
00040     int header_parsed;
00041     unsigned char dec_temp[18*2];
00042     int in_temp;
00043 } ADXContext;
00044 
00045 #define    BASEVOL   0x4000
00046 #define    SCALE1    0x7298
00047 #define    SCALE2    0x3350
00048 
00049 #endif /* AVCODEC_ADX_H */

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