b3_ptr = plane->bands[3].buf;
for (y = 0; y < plane->height; y += 2) {
+
+ if (y+2 >= plane->height)
+ pitch= 0;
/* load storage variables with values */
if (num_bands > 0) {
b0_1 = b0_ptr[0];
}
for (x = 0, indx = 0; x < plane->width; x+=2, indx++) {
+ if (x+2 >= plane->width) {
+ b0_ptr --;
+ b1_ptr --;
+ b2_ptr --;
+ b3_ptr --;
+ }
+
/* some values calculated in the previous iterations can */
/* be reused in the next ones, so do appropriate copying */
b2_1 = b2_2; // b2[x-1,y ] = b2[x, y ]
back_pitch = -pitch;
- b0_ptr += pitch;
- b1_ptr += pitch;
- b2_ptr += pitch;
- b3_ptr += pitch;
+ b0_ptr += pitch + 1;
+ b1_ptr += pitch + 1;
+ b2_ptr += pitch + 1;
+ b3_ptr += pitch + 1;
}
}