File formantosc.h¶

File List > DaisySP > Source > Synthesis > formantosc.h
Source Code¶

/*
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_FORMANTOSCILLATOR_H
#define DSY_FORMANTOSCILLATOR_H

#include <stdint.h>
#ifdef __cplusplus

namespace daisysp
{
class FormantOscillator
{
  public:
    FormantOscillator() {}
    ~FormantOscillator() {}

    void Init(float sample_rate);

    float Process();

    void SetFormantFreq(float freq);

    void SetCarrierFreq(float freq);

    void SetPhaseShift(float ps);

  private:
    inline float Sine(float phase);
    inline float ThisBlepSample(float t);
    inline float NextBlepSample(float t);

    // Oscillator state.
    float carrier_phase_;
    float formant_phase_;
    float next_sample_;

    // For interpolation of parameters.
    float carrier_frequency_;
    float formant_frequency_;
    float phase_shift_;
    float ps_inc_;

    float sample_rate_;

    //DISALLOW_COPY_AND_ASSIGN(FormantOscillator);
};
} //namespace daisysp
#endif
#endif