filtermodule.h

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#pragma once

#include "synthbase.h"
#include "synthfunctions.h"

// -----------------------------
//  --- SynthLab SDK File --- //
//  ----------------------------
// -----------------------------------------------------------------------------
namespace SynthLab
{
    class FilterModule : public SynthModule
    {
    public:
        FilterModule(std::shared_ptr<MidiInputData> _midiInputData,
            std::shared_ptr<FilterParameters> _parameters,
            uint32_t blockSize = 64);
        virtual ~FilterModule() {}

        virtual bool reset(double _sampleRate) override;
        virtual bool update() override;
        virtual bool render(uint32_t samplesToProcess = 1) override;
        virtual bool doNoteOn(MIDINoteEvent& noteEvent) override;
        virtual bool doNoteOff(MIDINoteEvent& noteEvent) override;

        std::shared_ptr<FilterParameters> getParameters() { return parameters; }

    protected:
        std::shared_ptr<FilterParameters> parameters = nullptr;
    
        double sampleRate = 0.0; 
        double midiPitch = 0.0; // for keytrack

        // --- stereo filters and coefficients; see FX book
        enum { vicLPF2, vicBPF2 };
        BQAudioFilter filters[STEREO_CHANNELS]; // stereo pair of filters
        enum { a0, a1, a2, b1, b2, c0, d0 };
    };

}