grainlet.h

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/*
Copyright (c) 2020 Electrosmith, Corp, Emilie Gillet
 
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
 
#pragma once
#ifndef DSY_GRAINLET_H
#define DSY_GRAINLET_H
 
#include <stdint.h>
#ifdef __cplusplus
 
namespace daisysp
{
class GrainletOscillator
{
  public:
    GrainletOscillator() {}
    ~GrainletOscillator() {}
 
    void Init(float sample_rate);
 
    float Process();
 
    void SetFreq(float freq);
 
    void SetFormantFreq(float freq);
 
    void SetShape(float shape);
 
    void SetBleed(float bleed);
 
  private:
    float Sine(float phase);
 
    float Carrier(float phase, float shape);
 
    float Grainlet(float carrier_phase,
                   float formant_phase,
                   float shape,
                   float bleed);
 
    // Oscillator state.
    float carrier_phase_;
    float formant_phase_;
    float next_sample_;
 
    // For interpolation of parameters.
    float carrier_frequency_;
    float formant_frequency_;
    float carrier_shape_;
    float carrier_bleed_;
 
    float new_carrier_shape_;
    float new_carrier_bleed_;
 
    float sample_rate_;
};
} // namespace daisysp
#endif
#endif