mgardner.cpp

QAM module to use in Java with an easy interface and powerful performance

//---------------------------------------------------------------------------


#pragma hdrstop

#include "MGardner.h"

//---------------------------------------------------------------------------

#pragma package(smart_init)


void __fastcall MGardner::OffPointUpdate(PtComplex Point)
{
        y[1].re=Point.re;
        y[1].im=Point.im;
}

void __fastcall MGardner::OnPointUpdate(PtComplex Point)
{
        y[0].re=y[2].re;
        y[0].im=y[2].im;
        y[2].re=Point.re;
        y[2].im=Point.im;

        PtComplex mid;
        mid.re=0.5*(y[2].re+y[0].re);
        mid.im=0.5*(y[2].im+y[0].im);
        double e=((y[0].re-y[2].re)*(y[1].re-mid.re))+((y[0].im-y[2].im)*(y[1].im-mid.im));
        AveSum-=AveBuff[AveBuffPtr];
        AveBuff[AveBuffPtr]=e;
        AveSum+=AveBuff[AveBuffPtr];
        AveBuffPtr++;AveBuffPtr%=AveBuff.size();
        GardError=AveSum/AveBuff.size();
        if(AveSum>0)GardShift=GARDSHIFT;
         else GardShift=-GARDSHIFT;
       //Optional to stop moterboating if buffersize is big
       //for(int i=0;i<AveBuff.size();i++)AveBuff[i]-=GardShift;
       //AveSum-=GardShift*AveBuff.size();

}

__fastcall MGardner::MGardner()
{
        AveBuff.resize(32);
        AveBuffPtr=0;
        AveSum=0.0;
        for(unsigned int i=0;i<AveBuff.size();i++)AveBuff[i]=0.0;
}