/********************************
Author: Sravanthi Kota Venkata
********************************/

#include "sdvbs_common.h"

F2D* ffConv2(F2D* a, F2D* b)
{
    F2D *c, *out;
    int ma, na, mb, nb, ci, cj, i, j, m, n, ri, mm, nn;
    int r_index, c_index;

    ma = a->height;
    na = a->width;

    mb = b->height;
    nb = b->width;
    
    ci = ma;
    cj = na;

    c = fSetArray(ci, cj, 0);

    r_index = mb/2;
    c_index = nb/2;

    for(i=0; i<ma; i++)
    {
        for(j=0; j<na; j++)
        {
            for(m=0; m<mb; m++)
            {
                mm = mb-1-m;
                for(n=0; n<nb; n++)
                {
                    nn = nb-1-n;
                    ri = i+m-r_index;
                    ci = j+n-c_index;
                    if(ri >=0 && ri < ma && ci >= 0 && ci < na)
                    subsref(c,i,j) += subsref(a,ri,ci) * subsref(b,mm,nn);
                }
            }
        }
    }

    return c;
}