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- #ifndef _Resonator_h_
- #define _Resonator_h_
- /* Resonator.h
- *
- * Copyright (C) 2008-2011, 2015 David Weenink
- *
- * This code 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 code 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 work. If not, see <http://www.gnu.org/licenses/>.
- */
- /*
- * djmw 20081029
- * djmw 20110306 Latest modification
- */
-
- #include "Sound.h"
- Thing_define (Filter, Daata) {
- double dT;
- double a, b, c;
- double p1, p2;
- virtual double v_getOutput (double input);
- virtual void v_setFB (double f, double b);
- virtual void v_resetMemory ();
- };
- Thing_define (Resonator, Filter) {
- int normalisation;
- void v_setFB (double f, double b)
- override;
- };
- Thing_define (AntiResonator, Resonator) {
- double v_getOutput (double input)
- override;
- void v_setFB (double f, double b)
- override;
- };
- Thing_define (ConstantGainResonator, Filter) {
- double d;
- double p3, p4;
- double v_getOutput (double input)
- override;
- void v_setFB (double f, double b)
- override;
- void v_resetMemory ()
- override;
- };
- #define Resonator_NORMALISATION_H0 0
- #define Resonator_NORMALISATION_HMAX 1
- autoResonator Resonator_create (double dT, int normalisation);
- autoConstantGainResonator ConstantGainResonator_create (double dT);
- autoAntiResonator AntiResonator_create (double dT);
- /*
- Set a,b,c
- normalisation == 0: H(0) = 1 -> a = 1 -b - c
- normalisation == 1: H(Fmax) = 1 -> a = (1 + c)sin(2*pi*F*T)
- */
- void Filter_setFB (Filter me, double f, double b);
- double Filter_getOutput (Filter me, double input);
- void Filter_resetMemory (Filter me);
- #endif /* _Resonator_h_ */
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