static void build_filter(int16_t *filter, float factor)
{
int ph, i, v;
- float x, y, tab[NB_TAPS], norm, mult;
+ float x, y, tab[NB_TAPS], norm, mult, target;
/* if upsampling, only need to interpolate, no filter */
if (factor > 1.0)
}
/* normalize so that an uniform color remains the same */
- mult = (float)(1 << FILTER_BITS) / norm;
+ target= 1 << FILTER_BITS;
for(i=0;i<NB_TAPS;i++) {
- v = (int)(tab[i] * mult);
+ mult = target / norm;
+ v = lrintf(tab[i] * mult);
filter[ph * NB_TAPS + i] = v;
+ norm -= tab[i];
+ target -= v;
}
}
}