// second stage combined with interleave and shift
b0 = b2 = COMPOSE_DAUB97iL0(temp[w2], temp[0], temp[w2]);
- b[0] = (b0 + 1) >> 1;
+ b[0] = ~((~b0) >> 1);
for (x = 1; x < w2; x++) {
b2 = COMPOSE_DAUB97iL0(temp[x+w2-1], temp[x ], temp[x+w2]);
b1 = COMPOSE_DAUB97iH0( b0, temp[x+w2-1], b2 );
- b[2*x-1] = (b1 + 1) >> 1;
- b[2*x ] = (b2 + 1) >> 1;
+ b[2*x-1] = ~((~b1) >> 1);
+ b[2*x ] = ~((~b2) >> 1);
b0 = b2;
}
- b[w-1] = (COMPOSE_DAUB97iH0(b2, temp[w-1], b2) + 1) >> 1;
+ b[w-1] = ~((~COMPOSE_DAUB97iH0(b2, temp[w-1], b2)) >> 1);
}
static void RENAME(vertical_compose_dirac53iH0)(uint8_t *_b0, uint8_t *_b1, uint8_t *_b2,