#ifndef __Biquad_H
#define __Biquad_H

#include <lv2plugin.h>

class Biquad : public LV2Plugin<4> {
public:
    Biquad(double rate);

    void activate();
    void run(uint32_t num_samples);

    static constexpr const char * URI = "https://www.airwindows.com/biquad";

private:
    /*
     * These are the original DSP functions from the VST plugin.
     * They need to be called from the LV2 plugins `run` function.
     */
    void processReplacing(float **in, float **out, VstInt32 samples);
    void processDoubleReplacing(double **in, double **out, VstInt32 samples);

    /*
     * Members needed by the processing functions.
     */
        
	long double biquad[11]; //note that this stereo form doesn't require L and R forms!
	//This is because so much of it is coefficients etc. that are the same on both channels.
	//So the stored samples are in 7-8 and 9-10, and freq/res/coefficients serve both.
	
	uint32_t fpd;
	//default stuff

    float A;
    float B;
    float C;
    float D;
};

#endif