Unison.h (1961B)
1 /* 2 ZynAddSubFX - a software synthesizer 3 4 Unison.h - Unison effect (multivoice chorus) 5 Copyright (C) 2002-2009 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 UNISON_H 15 #define UNISON_H 16 17 #include "../Misc/Util.h" 18 19 //how much the unison frequencies varies (always >= 1.0) 20 #define UNISON_FREQ_SPAN 2.0f 21 22 namespace zyn { 23 24 class Allocator; 25 26 class Unison 27 { 28 public: 29 Unison(Allocator *alloc_, int update_period_samples_, float max_delay_sec_, float srate_f); 30 ~Unison(); 31 32 void setSize(int new_size); 33 void setBaseFrequency(float freq); 34 void setBandwidth(float bandwidth_cents); 35 36 void process(int bufsize, float *inbuf, float *outbuf = NULL); 37 38 private: 39 void updateParameters(void); 40 void updateUnisonData(void); 41 42 int unison_size; 43 float base_freq; 44 struct UnisonVoice { 45 float step; //base LFO 46 float position; 47 float realpos1; //the position regarding samples 48 float realpos2; 49 float relative_amplitude; 50 float lin_fpos; 51 float lin_ffreq; 52 UnisonVoice() { 53 position = RND * 1.8f - 0.9f; 54 realpos1 = 0.0f; 55 realpos2 = 0.0f; 56 step = 0.0f; 57 relative_amplitude = 1.0f; 58 } 59 } *uv; 60 61 int update_period_samples; 62 int update_period_sample_k; 63 int max_delay, delay_k; 64 bool first_time; 65 float *delay_buffer; 66 float unison_amplitude_samples; 67 float unison_bandwidth_cents; 68 69 // current setup 70 float samplerate_f; 71 Allocator &alloc; 72 }; 73 74 } 75 76 #endif