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73 lines
1.7 KiB
73 lines
1.7 KiB
4 years ago
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#pragma once
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#ifndef DSY_FORMANTOSCILLATOR_H
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#define DSY_FORMANTOSCILLATOR_H
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#include <stdint.h>
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#ifdef __cplusplus
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/** @file formantosc.h */
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namespace daisysp
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{
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/**
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@brief Formant Oscillator Module.
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@author Ben Sergentanis
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@date Dec 2020
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Sinewave with aliasing-free phase reset. \n \n
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Ported from pichenettes/eurorack/plaits/dsp/oscillator/formant_oscillator.h \n
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to an independent module. \n
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Original code written by Emilie Gillet in 2016. \n
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*/
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class FormantOscillator
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{
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public:
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FormantOscillator() {}
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~FormantOscillator() {}
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/** Initializes the FormantOscillator module.
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\param sample_rate - The sample rate of the audio engine being run.
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*/
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void Init(float sample_rate);
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/** Get the next sample
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*/
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float Process();
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/** Set the formant frequency.
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\param freq Frequency in Hz
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*/
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void SetFormantFreq(float freq);
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/** Set the carrier frequency. This is the "main" frequency.
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\param freq Frequency in Hz
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*/
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void SetCarrierFreq(float freq);
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/** Set the amount of phase shift
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\param ps Typically 0-1. Works with other values though, including negative.
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*/
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void SetPhaseShift(float ps);
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private:
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inline float Sine(float phase);
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inline float ThisBlepSample(float t);
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inline float NextBlepSample(float t);
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// Oscillator state.
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float carrier_phase_;
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float formant_phase_;
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float next_sample_;
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// For interpolation of parameters.
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float carrier_frequency_;
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float formant_frequency_;
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float phase_shift_;
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float ps_inc_;
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float sample_rate_;
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//DISALLOW_COPY_AND_ASSIGN(FormantOscillator);
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};
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} //namespace daisysp
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#endif
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#endif
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