1cabdff1aSopenharmony_ci/*
2cabdff1aSopenharmony_ci * Copyright (c) 2001-2003 The FFmpeg project
3cabdff1aSopenharmony_ci *
4cabdff1aSopenharmony_ci * This file is part of FFmpeg.
5cabdff1aSopenharmony_ci *
6cabdff1aSopenharmony_ci * FFmpeg is free software; you can redistribute it and/or
7cabdff1aSopenharmony_ci * modify it under the terms of the GNU Lesser General Public
8cabdff1aSopenharmony_ci * License as published by the Free Software Foundation; either
9cabdff1aSopenharmony_ci * version 2.1 of the License, or (at your option) any later version.
10cabdff1aSopenharmony_ci *
11cabdff1aSopenharmony_ci * FFmpeg is distributed in the hope that it will be useful,
12cabdff1aSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of
13cabdff1aSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14cabdff1aSopenharmony_ci * Lesser General Public License for more details.
15cabdff1aSopenharmony_ci *
16cabdff1aSopenharmony_ci * You should have received a copy of the GNU Lesser General Public
17cabdff1aSopenharmony_ci * License along with FFmpeg; if not, write to the Free Software
18cabdff1aSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19cabdff1aSopenharmony_ci */
20cabdff1aSopenharmony_ci
21cabdff1aSopenharmony_ci/**
22cabdff1aSopenharmony_ci * @file
23cabdff1aSopenharmony_ci * ADPCM encoder/decoder common header.
24cabdff1aSopenharmony_ci */
25cabdff1aSopenharmony_ci
26cabdff1aSopenharmony_ci#ifndef AVCODEC_ADPCM_H
27cabdff1aSopenharmony_ci#define AVCODEC_ADPCM_H
28cabdff1aSopenharmony_ci
29cabdff1aSopenharmony_ci#include <stdint.h>
30cabdff1aSopenharmony_ci
31cabdff1aSopenharmony_citypedef struct ADPCMChannelStatus {
32cabdff1aSopenharmony_ci    int predictor;
33cabdff1aSopenharmony_ci    int16_t step_index;
34cabdff1aSopenharmony_ci    int step;
35cabdff1aSopenharmony_ci    /* for encoding */
36cabdff1aSopenharmony_ci    int prev_sample;
37cabdff1aSopenharmony_ci
38cabdff1aSopenharmony_ci    /* MS version */
39cabdff1aSopenharmony_ci    int sample1;
40cabdff1aSopenharmony_ci    int sample2;
41cabdff1aSopenharmony_ci    int coeff1;
42cabdff1aSopenharmony_ci    int coeff2;
43cabdff1aSopenharmony_ci    int idelta;
44cabdff1aSopenharmony_ci} ADPCMChannelStatus;
45cabdff1aSopenharmony_ci
46cabdff1aSopenharmony_ciint16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag);
47cabdff1aSopenharmony_ci
48cabdff1aSopenharmony_ci#endif /* AVCODEC_ADPCM_H */
49