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libavcodec/adpcm.h

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00001 /*
00002  * Copyright (c) 2001-2003 The ffmpeg Project
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * Libav is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with Libav; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00026 #ifndef AVCODEC_ADPCM_H
00027 #define AVCODEC_ADPCM_H
00028 
00029 #define BLKSIZE 1024
00030 
00031 typedef struct ADPCMChannelStatus {
00032     int predictor;
00033     short int step_index;
00034     int step;
00035     /* for encoding */
00036     int prev_sample;
00037 
00038     /* MS version */
00039     short sample1;
00040     short sample2;
00041     int coeff1;
00042     int coeff2;
00043     int idelta;
00044 } ADPCMChannelStatus;
00045 
00046 #endif /* AVCODEC_ADPCM_H */
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