#ifndef OSCILLATOR_HPP_INCLUDED
#define OSCILLATOR_HPP_INCLUDED

#include <cstdint>

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

class Oscillator {
  enum WaveShape { kWaveShapeSine, kWaveShapeTriangle, kWaveShapeSquare };

public:
  Oscillator(float initFreq);
  void process(float *out, uint32_t frames);

  void setFrequency(float newFreq);
  float getFrequency() const;

  void setGain(float newGain);
  float getGain() const;

  void setSampleRate(float newSampleRate);
  float getSampleRate() const;

  void setWaveShape(WaveShape shape);
  WaveShape getWaveShape() const;

private:
  float freq_;
  float gain_;
  WaveShape waveShape_;
  float sampleRate_;
  float phase_;
  float inc_;
  void recalc_();
};

#endif // OSCILLATOR_HPP_INCLUDED