variableshapeosc.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_VARIABLESHAPEOSCILLATOR_H
#define DSY_VARIABLESHAPEOSCILLATOR_H
 
#include <stdint.h>
#ifdef __cplusplus
 
namespace daisysp
{
class VariableShapeOscillator
{
  public:
    VariableShapeOscillator() {}
    ~VariableShapeOscillator() {}
 
    void Init(float sample_rate);
 
    float Process();
 
    void SetFreq(float frequency);
 
    void SetPW(float pw);
 
    void SetWaveshape(float waveshape);
 
    void SetSync(bool enable_sync);
 
    void SetSyncFreq(float frequency);
 
  private:
    float ComputeNaiveSample(float phase,
                             float pw,
                             float slope_up,
                             float slope_down,
                             float triangle_amount,
                             float square_amount);
 
    float sample_rate_;
    bool  enable_sync_;
 
    // Oscillator state.
    float master_phase_;
    float slave_phase_;
    float next_sample_;
    float previous_pw_;
    bool  high_;
 
    // For interpolation of parameters.
    float master_frequency_;
    float slave_frequency_;
    float pw_;
    float waveshape_;
};
} // namespace daisysp
#endif
#endif