gtkradiant/tools/quake2/qdata_heretic2/adpcm.h

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/*
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GtkRadiant is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
** adpcm.h - include file for adpcm coder.
**
** Version 1.0, 7-Jul-92.
**
** Modded 10/3/98
** John Scott
*/
typedef struct adpcm_state_s
{
short in_valprev; // Previous output value
short in_index; // Index into stepsize table
short out_valprev; // Previous output value
short out_index; // Index into stepsize table
int count; // Number of sample counts
} adpcm_state_t;
typedef struct adpcm_s
{
adpcm_state_t state;
char adpcm[0x10000];
} adpcm_t;
void adpcm_coder(short [], adpcm_t *);
void adpcm_decoder(adpcm_t *, short []);
// end