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/* convolve.h: Header for convolutions.
*
* Copyright (C) 1999 Ralph Loader <suckfish@ihug.co.nz>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*
* Note: 7th December 2004: This file used to be licensed under the GPL,
* but we got permission from Ralp Loader to relicense it to LGPL.
*
*
*/
#ifndef CONVOLVE_H
#define CONVOLVE_H
#ifdef __cplusplus
extern "C" {
#endif
/* convolve_match takes two blocks, one twice the size of the other. The
* sizes of these are CONVOLVE_BIG and CONVOLVE_SMALL respectively. */
#define CONVOLVE_DEPTH 8
#define CONVOLVE_SMALL (1 << CONVOLVE_DEPTH)
#define CONVOLVE_BIG (CONVOLVE_SMALL * 2)
/* Convolution stuff */
typedef struct _struct_convolve_state convolve_state;
convolve_state *convolve_init (void);
void convolve_close (convolve_state * state);
int convolve_match (const int * lastchoice,
const short int * input,
convolve_state * state);
#ifdef __cplusplus
}
#endif
#endif
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