horizont/Source/PitchShifter.h

#pragma once

#include <vector>

class PitchShifter
{
public:
    void prepare (double sampleRate);
    void reset();

    float process (float input, float ratio);

private:
    float at (int index) const;
    float readCubic (float pos) const;

    std::vector<float> buffer;
    int bufferSize = 0;
    int writePos = 0;
    float o = 0.0f;
    float baseDelay = 0.0f;
    float window = 0.0f;
};