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/* Libvisual-plugins - Standard plugins for libvisual
*
* Copyright (C) 2004, 2005, 2006 Antti Silvast <asilvast@iki.fi>
*
* Authors: Antti Silvast <asilvast@iki.fi>
* Dennis Smit <ds@nerds-incorporated.org>
*
* $Id: notch.h,v 1.3 2006/01/22 13:25:26 synap Exp $
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
typedef struct {
float cutoff;
float a0;
float b1;
float b2;
float x1;
float x2;
} NOTCH_FILTER;
#define SAMPLING_RATE 44100
NOTCH_FILTER * init_notch(float cutoff);
float process_notch(NOTCH_FILTER * l, float x0);
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