1/* 2 * Copyright (c) 2001-2003 The FFmpeg project 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/** 22 * @file 23 * ADPCM encoder/decoder common header. 24 */ 25 26#ifndef AVCODEC_ADPCM_H 27#define AVCODEC_ADPCM_H 28 29#include <stdint.h> 30 31typedef struct ADPCMChannelStatus { 32 int predictor; 33 int16_t step_index; 34 int step; 35 /* for encoding */ 36 int prev_sample; 37 38 /* MS version */ 39 int sample1; 40 int sample2; 41 int coeff1; 42 int coeff2; 43 int idelta; 44} ADPCMChannelStatus; 45 46int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag); 47 48#endif /* AVCODEC_ADPCM_H */ 49