#include <math.h>
#include <stdlib.h>
void pix(int frame, int alen, int achannels, short *abuf,
 int ww, int wh, int bpp, unsigned char *dst, unsigned char *src,
 unsigned char *buf2, unsigned char *buf3)
{
 int o, o1, x, y, x1, y1, dx=bpp, dy=bpp*ww;
 int benji,gerti,edwin;
// int rx=rand()/(RAND_MAX/3); int ry=rand()/(RAND_MAX/3);
 for(y=0; y<wh; y++) {
  for(x=0; x<ww; x++) {
   // o - position, should be: 0 <= o <= (ww*dx+y*dy-1)
   o=x*dx+y*dy;
   // simple move + fade
//   x1=x+(sin(-1+2.0*x/ww)*16);
//   y1=y+wh/(y+1);
benji=4*sin(frame*0.31);
gerti=5*cos(frame*0.19);
//edwin=3*cos(frame*0.047);
if(x!=ww/2-1) x1=x+(ww/(x-0.5*ww+1.0)+sin(frame*0.11)*20.0)/\
                   (1+4*benji); else x1=0;
if(y!=wh/2-1) y1=y+(wh/(y-0.5*wh+1.0)+cos(frame*0.13)*20.0)/\
                   (1+4*gerti); else y1=0;
   if(x1>=0 && x1<ww && y1>=0 && y1<wh) o1=x1*dx+y1*dy; else o1=0;
    dst[0+o]=dst[0+o]*14/32+src[0+o1]*18/32; // blue
    dst[1+o]=dst[1+o]*14/32+src[1+o1]*18/32; // green
    dst[2+o]=dst[2+o]*14/32+src[2+o1]*18/32; // red
  }
 }
}