?? layer3.c
字號:
if (!(modes[sfbi] & I_STEREO))
continue;
is_pos = right_ch->scalefac[sfbi];
if (is_pos >= 7) { /* illegal intensity position */
modes[sfbi] &= ~I_STEREO;
continue;
}
for (i = 0; i < n; ++i) {
register mad_fixed_t left;
left = xr[0][l + i];
xr[0][l + i] = mad_f_mul(left, is_table[ is_pos]);
xr[1][l + i] = mad_f_mul(left, is_table[6 - is_pos]);
}
}
}
}
/* middle/side stereo */
if (header->mode_extension & MS_STEREO) {
register mad_fixed_t invsqrt2;
header->flags |= MAD_FLAG_MS_STEREO;
invsqrt2 = root_table[3 + -2];
for (sfbi = l = 0; l < 576; ++sfbi, l += n) {
n = sfbwidth[sfbi];
if (modes[sfbi] != MS_STEREO)
continue;
for (i = 0; i < n; ++i) {
register mad_fixed_t m, s;
m = xr[0][l + i];
s = xr[1][l + i];
xr[0][l + i] = mad_f_mul(m + s, invsqrt2); /* l = (m + s) / sqrt(2) */
xr[1][l + i] = mad_f_mul(m - s, invsqrt2); /* r = (m - s) / sqrt(2) */
}
}
}
return MAD_ERROR_NONE;
}
/*
* NAME: III_aliasreduce()
* DESCRIPTION: perform frequency line alias reduction
*/
static
void III_aliasreduce(mad_fixed_t xr[576], int lines)
{
mad_fixed_t const *bound;
int i;
bound = &xr[lines];
for (xr += 18; xr < bound; xr += 18) {
for (i = 0; i < 8; ++i) {
register mad_fixed_t a, b;
register mad_fixed64hi_t hi;
register mad_fixed64lo_t lo;
a = xr[-1 - i];
b = xr[ i];
# if defined(ASO_ZEROCHECK)
if (a | b) {
# endif
MAD_F_ML0(hi, lo, a, cs[i]);
MAD_F_MLA(hi, lo, -b, ca[i]);
xr[-1 - i] = MAD_F_MLZ(hi, lo);
MAD_F_ML0(hi, lo, b, cs[i]);
MAD_F_MLA(hi, lo, a, ca[i]);
xr[ i] = MAD_F_MLZ(hi, lo);
# if defined(ASO_ZEROCHECK)
}
# endif
}
}
}
# if defined(ASO_IMDCT)
void III_imdct_l(mad_fixed_t const [18], mad_fixed_t [36], unsigned int);
# else
/*
* NAME: imdct36
* DESCRIPTION: perform X[18]->x[36] IMDCT
*/
static inline
void imdct36(mad_fixed_t const X[18], mad_fixed_t x[36])
{
mad_fixed_t t0, t1, t2, t3, t4, t5, t6, t7;
mad_fixed_t t8, t9, t10, t11, t12, t13, t14, t15;
register mad_fixed64hi_t hi;
register mad_fixed64lo_t lo;
MAD_F_ML0(hi, lo, X[4], MAD_F(0x0ec835e8));
MAD_F_MLA(hi, lo, X[13], MAD_F(0x061f78aa));
t6 = MAD_F_MLZ(hi, lo);
MAD_F_MLA(hi, lo, (t14 = X[1] - X[10]), -MAD_F(0x061f78aa));
MAD_F_MLA(hi, lo, (t15 = X[7] + X[16]), -MAD_F(0x0ec835e8));
t0 = MAD_F_MLZ(hi, lo);
MAD_F_MLA(hi, lo, (t8 = X[0] - X[11] - X[12]), MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, (t9 = X[2] - X[9] - X[14]), MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, (t10 = X[3] - X[8] - X[15]), -MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, (t11 = X[5] - X[6] - X[17]), -MAD_F(0x0fdcf549));
x[7] = MAD_F_MLZ(hi, lo);
x[10] = -x[7];
MAD_F_ML0(hi, lo, t8, -MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, t9, MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, t10, MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, t11, -MAD_F(0x09bd7ca0));
x[19] = x[34] = MAD_F_MLZ(hi, lo) - t0;
t12 = X[0] - X[3] + X[8] - X[11] - X[12] + X[15];
t13 = X[2] + X[5] - X[6] - X[9] - X[14] - X[17];
MAD_F_ML0(hi, lo, t12, -MAD_F(0x0ec835e8));
MAD_F_MLA(hi, lo, t13, MAD_F(0x061f78aa));
x[22] = x[31] = MAD_F_MLZ(hi, lo) + t0;
MAD_F_ML0(hi, lo, X[1], -MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, X[7], MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, X[10], -MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, X[16], MAD_F(0x0cb19346));
t1 = MAD_F_MLZ(hi, lo) + t6;
MAD_F_ML0(hi, lo, X[0], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0f9ee890));
x[6] = MAD_F_MLZ(hi, lo) + t1;
x[11] = -x[6];
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[2], -MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[17], MAD_F(0x04cfb0e2));
x[23] = x[30] = MAD_F_MLZ(hi, lo) + t1;
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[11], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0acf37ad));
x[18] = x[35] = MAD_F_MLZ(hi, lo) - t1;
MAD_F_ML0(hi, lo, X[4], MAD_F(0x061f78aa));
MAD_F_MLA(hi, lo, X[13], -MAD_F(0x0ec835e8));
t7 = MAD_F_MLZ(hi, lo);
MAD_F_MLA(hi, lo, X[1], -MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, X[7], MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, X[10], MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, X[16], -MAD_F(0x09bd7ca0));
t2 = MAD_F_MLZ(hi, lo);
MAD_F_MLA(hi, lo, X[0], MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[12], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[17], MAD_F(0x0f426cb5));
x[5] = MAD_F_MLZ(hi, lo);
x[12] = -x[5];
MAD_F_ML0(hi, lo, X[0], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[11], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0bcbe352));
x[0] = MAD_F_MLZ(hi, lo) + t2;
x[17] = -x[0];
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[2], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x03768962));
x[24] = x[29] = MAD_F_MLZ(hi, lo) + t2;
MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, X[7], -MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, X[10], MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, X[16], MAD_F(0x0fdcf549));
t3 = MAD_F_MLZ(hi, lo) + t7;
MAD_F_ML0(hi, lo, X[0], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[12], MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0ffc19fd));
x[8] = MAD_F_MLZ(hi, lo) + t3;
x[9] = -x[8];
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[14], -MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[17], MAD_F(0x07635284));
x[21] = x[32] = MAD_F_MLZ(hi, lo) + t3;
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[12], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0898c779));
x[20] = x[33] = MAD_F_MLZ(hi, lo) - t3;
MAD_F_ML0(hi, lo, t14, -MAD_F(0x0ec835e8));
MAD_F_MLA(hi, lo, t15, MAD_F(0x061f78aa));
t4 = MAD_F_MLZ(hi, lo) - t7;
MAD_F_ML0(hi, lo, t12, MAD_F(0x061f78aa));
MAD_F_MLA(hi, lo, t13, MAD_F(0x0ec835e8));
x[4] = MAD_F_MLZ(hi, lo) + t4;
x[13] = -x[4];
MAD_F_ML0(hi, lo, t8, MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, t9, -MAD_F(0x0216a2a2));
MAD_F_MLA(hi, lo, t10, MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, t11, -MAD_F(0x0cb19346));
x[1] = MAD_F_MLZ(hi, lo) + t4;
x[16] = -x[1];
MAD_F_ML0(hi, lo, t8, -MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, t9, -MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, t10, -MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, t11, -MAD_F(0x0216a2a2));
x[25] = x[28] = MAD_F_MLZ(hi, lo) + t4;
MAD_F_ML0(hi, lo, X[1], -MAD_F(0x0fdcf549));
MAD_F_MLA(hi, lo, X[7], -MAD_F(0x0cb19346));
MAD_F_MLA(hi, lo, X[10], -MAD_F(0x09bd7ca0));
MAD_F_MLA(hi, lo, X[16], -MAD_F(0x0216a2a2));
t5 = MAD_F_MLZ(hi, lo) - t6;
MAD_F_ML0(hi, lo, X[0], MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[6], MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[9], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[12], MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[14], -MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[15], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x0d7e8807));
x[2] = MAD_F_MLZ(hi, lo) + t5;
x[15] = -x[2];
MAD_F_ML0(hi, lo, X[0], MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[2], MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[3], MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[5], MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x00b2aa3e));
MAD_F_MLA(hi, lo, X[8], MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[11], MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[14], MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[17], MAD_F(0x0e313245));
x[3] = MAD_F_MLZ(hi, lo) + t5;
x[14] = -x[3];
MAD_F_ML0(hi, lo, X[0], -MAD_F(0x0ffc19fd));
MAD_F_MLA(hi, lo, X[2], -MAD_F(0x0f9ee890));
MAD_F_MLA(hi, lo, X[3], -MAD_F(0x0f426cb5));
MAD_F_MLA(hi, lo, X[5], -MAD_F(0x0e313245));
MAD_F_MLA(hi, lo, X[6], -MAD_F(0x0d7e8807));
MAD_F_MLA(hi, lo, X[8], -MAD_F(0x0bcbe352));
MAD_F_MLA(hi, lo, X[9], -MAD_F(0x0acf37ad));
MAD_F_MLA(hi, lo, X[11], -MAD_F(0x0898c779));
MAD_F_MLA(hi, lo, X[12], -MAD_F(0x07635284));
MAD_F_MLA(hi, lo, X[14], -MAD_F(0x04cfb0e2));
MAD_F_MLA(hi, lo, X[15], -MAD_F(0x03768962));
MAD_F_MLA(hi, lo, X[17], -MAD_F(0x00b2aa3e));
x[26] = x[27] = MAD_F_MLZ(hi, lo) + t5;
}
/*
* NAME: III_imdct_l()
* DESCRIPTION: perform IMDCT and windowing for long blocks
*/
static
void III_imdct_l(mad_fixed_t const X[18], mad_fixed_t z[36],
unsigned int block_type)
{
unsigned int i;
/* IMDCT */
imdct36(X, z);
/* windowing */
switch (block_type) {
case 0: /* normal window */
# if defined(ASO_INTERLEAVE1)
{
register mad_fixed_t tmp1, tmp2;
tmp1 = window_l[0];
tmp2 = window_l[1];
for (i = 0; i < 34; i += 2) {
z[i + 0] = mad_f_mul(z[i + 0], tmp1);
tmp1 = window_l[i + 2];
z[i + 1] = mad_f_mul(z[i + 1], tmp2);
tmp2 = window_l[i + 3];
}
z[34] = mad_f_mul(z[34], tmp1);
z[35] = mad_f_mul(z[35], tmp2);
}
# elif defined(ASO_INTERLEAVE2)
{
register mad_fixed_t tmp1, tmp2;
tmp1 = z[0];
tmp2 = window_l[0];
for (i = 0; i < 35; ++i) {
z[i] = mad_f_mul(tmp1, tmp2);
tmp1 = z[i + 1];
tmp2 = window_l[i + 1];
}
z[35] = mad_f_mul(tmp1, tmp2);
}
# elif 1
for (i = 0; i < 36; i += 4) {
z[i + 0] = mad_f_mul(z[i + 0], window_l[i + 0]);
z[i + 1] = mad_f_mul(z[i + 1], window_l[i + 1]);
z[i + 2] = mad_f_mul(z[i + 2], window_l[i + 2]);
z[i + 3] = mad_f_mul(z[i + 3], window_l[i + 3]);
}
# else
for (i = 0; i < 36; ++i) z[i] = mad_f_mul(z[i], window_l[i]);
# endif
break;
case 1: /* start block */
for (i = 0; i < 18; ++i) z[i] = mad_f_mul(z[i], window_l[i]);
/* (i = 18; i < 24; ++i) z[i] unchanged */
for (i = 24; i < 30; ++i) z[i] = mad_f_mul(z[i], window_s[i - 18]);
for (i = 30; i < 36; ++i) z[i] = 0;
break;
case 3: /* stop block */
for (i = 0; i < 6; ++i) z[i] = 0;
for (i = 6; i < 12; ++i) z[i] = mad_f_mul(z[i], window_s[i - 6]);
/* (i = 12; i < 18; ++i) z[i] unchanged */
for (i = 18; i < 36; ++i) z[i] = mad_f_mul(z[i], window_l[i]);
break;
}
}
# endif /* ASO_IMDCT */
/*
* NAME: III_imdct_s()
* DESCRIPTION: perform IMDCT and windowing for short blocks
*/
static
void III_imdct_s(mad_fixed_t const X[18], mad_fixed_t z[36])
{
mad_fixed_t y[36], *yptr;
mad_fixed_t const *wptr;
int w, i;
register mad_fixed64hi_t hi;
register mad_fixed64lo_t lo;
/* IMDCT */
yptr = &y[0];
for (w = 0; w < 3; ++w) {
register mad_fixed_t const (*s)[6];
s = imdct_s;
for (i = 0; i < 3; ++i) {
MAD_F_ML0(hi, lo, X[0], (*s)[0]);
MAD_F_MLA(hi, lo, X[1], (*s)[1]);
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