addosccore.h

#pragma once

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

namespace SynthLab
{
    class AddOscCore : public ModuleCore
    {
    public:
        // --- constructor/destructor
        AddOscCore();                   /* C-TOR */
        virtual ~AddOscCore(){}     /* D-TOR */

        virtual bool reset(CoreProcData& processInfo) override;
        virtual bool update(CoreProcData& processInfo) override;
        virtual bool render(CoreProcData& processInfo) override;
        virtual bool doNoteOn(CoreProcData& processInfo) override;
        virtual bool doNoteOff(CoreProcData& processInfo) override;

    protected:
        double sampleRate = 1.0;
        double midiPitch = 0.0;         

        // --- timebase
        SynthClock oscClock;
        
        enum { ChebyT2, ChebyT3, ChebyT4, ChebyT5 };
        // --- NOT the most efficient implementation!!!!!
        inline double doChebyWaveshaper(double xn, uint32_t order)
        {
            double xSquared = xn*xn;
            double xCubed = xn*xSquared;
            double x4th = xn*xCubed;
            double x5th = xn*x4th;

            if (order == ChebyT2)
                return (2.0 * xSquared) - 1.0;
            else if (order == ChebyT3)
                return (4.0 * xCubed) - (3.0 * xn);
            else if (order == ChebyT4)
                return (8.0 * x4th) - (8.0 * xSquared) + 1.0;
            else if (order == ChebyT5)
                return (16.0 * x5th) - (20.0 * xCubed) + (5.0 * xn);

            return xn; // not found
        }


    };



} // namespace