#pragma once

#include "../FXProcessor.h"
#include "Biquad.h"

namespace serum
{

// ===========================================================================
// Distortion — waveshaper with drive and a post lowpass tone. p[0]=drive,
// p[1]=shape (soft/hard/fold), p[2]=tone, p[3]=output.
// ===========================================================================
class DistortionUnit : public FXUnit
{
public:
    void prepare (double sampleRate, int maxBlockSize) override;
    void reset() override;
    void process (float* l, float* r, int numSamples, const float p[4]) override;

private:
    double sr = 44100.0;
    Biquad lpL, lpR;

    static float shape (float x, float shapeParam) noexcept;
};

} // namespace serum