2 Copyright (C) 1999-2007 id Software, Inc. and contributors.
3 For a list of contributors, see the accompanying CONTRIBUTORS file.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant 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
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 ** adpcm.h - include file for adpcm coder.
25 ** Version 1.0, 7-Jul-92.
31 typedef struct adpcm_state_s
33 short in_valprev; // Previous output value
34 short in_index; // Index into stepsize table
35 short out_valprev; // Previous output value
36 short out_index; // Index into stepsize table
37 int count; // Number of sample counts
40 typedef struct adpcm_s
46 void adpcm_coder(short [], adpcm_t *);
47 void adpcm_decoder(adpcm_t *, short []);