1 /* convolve.h: Header for convolutions. 2 * 3 * Copyright (C) 1999 Ralph Loader <suckfish@ihug.co.nz> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public 16 * License along with this library; if not, write to the 17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 * 21 * Note: 7th December 2004: This file used to be licensed under the GPL, 22 * but we got permission from Ralp Loader to relicense it to LGPL. 23 * 24 * 25 */ 26 27 #ifndef CONVOLVE_H 28 #define CONVOLVE_H 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* Convolution state */ 35 typedef struct _struct_convolve_state convolve_state; 36 37 convolve_state *convolve_init (int depth); 38 void convolve_close (convolve_state * state); 39 40 int convolve_match (const int * lastchoice, 41 const short int * input, 42 convolve_state * state); 43 44 #ifdef __cplusplus 45 } 46 #endif 47 48 #endif 49