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/*
ZynAddSubFX - a software synthesizer
FormantFilter.h - formant filter
Copyright (C) 2002-2005 Nasca Octavian Paul
Author: Nasca Octavian Paul
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License
as published by the Free Software Foundation.
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 (version 2) for more details.
You should have received a copy of the GNU General Public License (version 2)
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef FORMANT_FILTER_H
#define FORMANT_FILTER_H
#include "../globals.h"
#include "Filter_.h"
#include "AnalogFilter.h"
#include "../Params/FilterParams.h"
class FormantFilter:public Filter_{
public:
FormantFilter(FilterParams *pars);
~FormantFilter();
void filterout(REALTYPE *smp);
void setfreq(REALTYPE frequency);
void setfreq_and_q(REALTYPE frequency,REALTYPE q_);
void setq(REALTYPE q_);
void cleanup();
private:
AnalogFilter *formant[FF_MAX_FORMANTS];
REALTYPE *inbuffer,*tmpbuf;
struct {
REALTYPE freq,amp,q;//frequency,amplitude,Q
} formantpar[FF_MAX_VOWELS][FF_MAX_FORMANTS],currentformants[FF_MAX_FORMANTS];
struct {
unsigned char nvowel;
} sequence [FF_MAX_SEQUENCE];
REALTYPE oldformantamp[FF_MAX_FORMANTS];
int sequencesize,numformants,firsttime;
REALTYPE oldinput,slowinput;
REALTYPE Qfactor,formantslowness,oldQfactor;
REALTYPE vowelclearness,sequencestretch;
void setpos(REALTYPE input);
};
#endif
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