/*
  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