static void compute_antialias_fixed(MPADecodeContext *s, GranuleDef *g) { int32_t *ptr, *csa; int n, i; /* we antialias only "long" bands */ if (g->block_type == 2) { if (!g->switch_point) return; /* XXX: check this for 8000Hz case */ n = 1; } else { n = SBLIMIT - 1; } ptr = g->sb_hybrid + 18; for(i = n;i > 0;i--) { int tmp0, tmp1, tmp2; csa = &csa_table[0][0]; #define INT_AA(j) \ tmp0 = ptr[-1-j];\ tmp1 = ptr[ j];\ tmp2= MULH(tmp0 + tmp1, csa[0+4*j]);\ ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa[2+4*j]));\ ptr[ j] = 4*(tmp2 + MULH(tmp0, csa[3+4*j])); INT_AA(0) INT_AA(1) INT_AA(2) INT_AA(3) INT_AA(4) INT_AA(5) INT_AA(6) INT_AA(7) ptr += 18; } }