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72 lines
1.6 KiB
72 lines
1.6 KiB
4 years ago
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#pragma once
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#ifndef DSY_VARISAWOSCILLATOR_H
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#define DSY_VARISAWOSCILLATOR_H
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#include <stdint.h>
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#ifdef __cplusplus
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/** @file variablesawosc.h */
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namespace daisysp
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{
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/**
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@brief Variable Saw Oscillator.
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@author Ben Sergentanis
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@date Dec 2020
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Saw with variable slope or notch. \n \n
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Ported from pichenettes/eurorack/plaits/dsp/oscillator/variable_saw_oscillator.h \n
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\n 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 VariableSawOscillator
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{
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public:
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VariableSawOscillator() {}
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~VariableSawOscillator() {}
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void Init(float sample_rate);
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/** Get the next sample */
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float Process();
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/** Set master freq.
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\param frequency Freq in Hz.
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*/
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void SetFreq(float frequency);
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/** Adjust the wave depending on the shape
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\param pw Notch or slope. Works best -1 to 1.
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*/
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void SetPW(float pw);
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/** Slope or notch
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\param waveshape 0 = notch, 1 = slope
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*/
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void SetWaveshape(float waveshape);
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private:
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float ComputeNaiveSample(float phase,
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float pw,
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float slope_up,
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float slope_down,
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float triangle_amount,
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float notch_amount);
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float sample_rate_;
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// Oscillator state.
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float phase_;
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float next_sample_;
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float previous_pw_;
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bool high_;
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const float kVariableSawNotchDepth = 0.2f;
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// For interpolation of parameters.
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float frequency_;
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float pw_;
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float waveshape_;
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};
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} // namespace daisysp
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#endif
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#endif
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