/* this function takes in the UArray_T of the pixels, and outputs the
Y, Pb, Pr representation
*/
CVC *rgb_pixels_to_CVC(UArray_T block, int denominator)
{
int num_pixels = UArray_length(block);
float avg_Pb = 0.0;
float avg_Pr = 0.0;
Pnm_rgb cur_pix;
Pnm_rgb_float cur_pix_float;
CVC *YPbPr = malloc(sizeof(struct CVC));
assert(YPbPr);
YPbPr->Y = malloc(sizeof(Lum_vals) * num_pixels);
assert(YPbPr->Y);
YPbPr->num_vals = num_pixels;
for (int i = 0; i < num_pixels; i++) {
cur_pix = (Pnm_rgb)UArray_at(block, i);
cur_pix_float = normalize_pixel(cur_pix, denominator);
YPbPr->Y[i] = get_Y(cur_pix_float);
avg_Pb += get_Pb(cur_pix_float);
avg_Pr += get_Pr(cur_pix_float);
free(cur_pix_float);
}
YPbPr->avg_Pb = avg_Pb / (float)num_pixels;
YPbPr->avg_Pr = avg_Pr / (float)num_pixels;
return YPbPr;
}
void sync_const() {
String s;
Form2->Edit1->Text = get_nb();
Form2->Edit2->Text = get_k();
Form2->Edit3->Text = make_name(get_Pb());
Form2->Edit4->Text = make_name(get_E());
Form2->Edit5->Text = make_name(get_G());
}
