fm2.h

/*
Copyright (c) 2020 Electrosmith, Corp
 
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_FM2_H
#define DSY_FM2_H
 
#include <stdint.h>
#include "Synthesis/oscillator.h"
#ifdef __cplusplus
 
namespace daisysp
{
class Fm2
{
  public:
    Fm2() {}
    ~Fm2() {}
 
    void Init(float samplerate);
 
 
    float Process();
 
    void SetFrequency(float freq);
 
    void SetRatio(float ratio);
 
    void SetIndex(float index);
 
    float GetIndex();
 
    void Reset();
 
  private:
    static constexpr float kIdxScalar      = 0.2f;
    static constexpr float kIdxScalarRecip = 1.f / kIdxScalar;
 
    Oscillator mod_, car_;
    float      idx_;
    float      freq_, lfreq_, ratio_, lratio_;
};
} // namespace daisysp
#endif
#endif