int2double

Digital Signal Processing Library

Voice Lab

int2double

void int2double(int *window, int window_size, double **d_window, int normalize)
{
 int i;
 double  max;

 /* copy first element, and use it as first maximum amount */
 (*d_window)[0] = (double)window[0];
 max = (*d_window)[0];

 /* for each additional element, copy and check if greater than maximum */
 for(i = 1; i < window_size; i++) {
  (*d_window)[i] = (double)window[i];
  if((*d_window)[i] >= 0) {
   /* value positive or zero */
   if((*d_window)[i] > max) max = (*d_window)[i];
  } else {
   /* value negative, invert sign before comparisson */
   if((-(*d_window)[i]) > max) max = -(*d_window)[i];
  }
 }
 DEBUG_WRITE2(1, "Max value: %f\n", max);

 /* section to mormalize vector */
 if(normalize == 1) {
  for(i = 0; i < window_size; i++) {
   (*d_window)[i] = (*d_window)[i]/max;
  }
 }
 return;
}