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93 lines
2.1 KiB
93 lines
2.1 KiB
4 years ago
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#pragma once
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#ifndef DSY_PARTICLE_H
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#define DSY_PARTICLE_H
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#include "Filters/svf.h"
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#include <stdint.h>
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#include <cstdlib>
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#ifdef __cplusplus
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/** @file particle.h */
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namespace daisysp
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{
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/**
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@brief Random impulse train processed by a resonant filter.
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@author Ported by Ben Sergentanis
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@date Jan 2021
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Noise processed by a sample and hold running at a target frequency. \n \n
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Ported from pichenettes/eurorack/plaits/dsp/noise/particle.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 Particle
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{
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public:
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Particle() {}
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~Particle() {}
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/** Initialize the module
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\param sample_rate Audio engine sample rate.
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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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float Process();
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/** Get the raw noise output. Must call Process() first. */
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float GetNoise();
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/** Set the resonant filter frequency
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\param freq Frequency in Hz
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*/
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void SetFreq(float frequency);
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/** Set the filter resonance
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\param resonance Works 0-1
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*/
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void SetResonance(float resonance);
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/** How often to randomize filter frequency
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\param freq Frequency in Hz.
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*/
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void SetRandomFreq(float freq);
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/** Noise density
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\param Works 0-1.
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*/
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void SetDensity(float density);
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/** Overall module gain
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\param Works 0-1.
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*/
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void SetGain(float gain);
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/** How much to randomize the set filter frequency.
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\param spread Works over positive numbers.
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*/
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void SetSpread(float spread);
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/** Force randomize the frequency.
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\param sync True to randomize freq.
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*/
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void SetSync(bool sync);
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private:
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static constexpr float kRandFrac = 1.f / (float)RAND_MAX;
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static constexpr float kRatioFrac = 1.f / 12.f;
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float sample_rate_;
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float aux_, frequency_, density_, gain_, spread_, resonance_;
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bool sync_;
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float rand_phase_;
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float rand_freq_;
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float pre_gain_;
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Svf filter_;
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};
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} // namespace daisysp
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#endif
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#endif
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