FormantFilter.h (1635B)
1 /* 2 ZynAddSubFX - a software synthesizer 3 4 FormantFilter.h - formant filter 5 Copyright (C) 2002-2005 Nasca Octavian Paul 6 Author: Nasca Octavian Paul 7 8 This program is free software; you can redistribute it and/or 9 modify it under the terms of the GNU General Public License 10 as published by the Free Software Foundation; either version 2 11 of the License, or (at your option) any later version. 12 */ 13 14 #ifndef FORMANT_FILTER_H 15 #define FORMANT_FILTER_H 16 17 #include "../globals.h" 18 #include "Filter.h" 19 #include "Value_Smoothing_Filter.h" 20 21 namespace zyn { 22 23 class FormantFilter:public Filter 24 { 25 public: 26 FormantFilter(const FilterParams *pars, Allocator *alloc, unsigned int srate, int bufsize); 27 ~FormantFilter(); 28 void filterout(float *smp); 29 void setfreq(float frequency); 30 void setfreq_and_q(float frequency, float q_); 31 void setq(float q_); 32 void setgain(float dBgain); 33 34 void cleanup(void); 35 36 private: 37 void setpos(float input); 38 39 40 class AnalogFilter * formant[FF_MAX_FORMANTS]; 41 42 struct { 43 float freq, amp, q; //frequency,amplitude,Q 44 } formantpar[FF_MAX_VOWELS][FF_MAX_FORMANTS], 45 currentformants[FF_MAX_FORMANTS]; 46 47 struct { 48 unsigned char nvowel; 49 } sequence [FF_MAX_SEQUENCE]; 50 51 int sequencesize, numformants; 52 bool firsttime; 53 float oldinput, slowinput; 54 float Qfactor, formantslowness, oldQfactor; 55 float vowelclearness, sequencestretch; 56 Allocator &memory; 57 58 Value_Smoothing_Filter formant_amp_smoothing[FF_MAX_FORMANTS]; 59 }; 60 61 } 62 63 #endif