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Combine two loops

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This commit is contained in:
Chris Robinson 2018-03-29 11:18:16 -07:00
parent 5523913a81
commit 880d555060
1 changed files with 27 additions and 29 deletions
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56
Alc/bformatdec.c
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@ -34,43 +34,41 @@ void bandsplit_clear(BandSplitter *splitter)
void bandsplit_process(BandSplitter *splitter, ALfloat *restrict hpout, ALfloat *restrict lpout,
const ALfloat *input, ALsizei count)
{
ALfloat coeff, d, x;
ALfloat z1, z2;
ALfloat lp_coeff, hp_coeff, lp_y, hp_y, d;
ALfloat lp_z1, lp_z2, hp_z1;
ALsizei i;
coeff = splitter->coeff*0.5f + 0.5f;
z1 = splitter->lp_z1;
z2 = splitter->lp_z2;
hp_coeff = splitter->coeff;
lp_coeff = splitter->coeff*0.5f + 0.5f;
lp_z1 = splitter->lp_z1;
lp_z2 = splitter->lp_z2;
hp_z1 = splitter->hp_z1;
for(i = 0;i < count;i++)
{
x = input[i];
ALfloat in = input[i];
d = (x - z1) * coeff;
x = z1 + d;
z1 = x + d;
/* Low-pass sample processing. */
d = (in - lp_z1) * lp_coeff;
lp_y = lp_z1 + d;
lp_z1 = lp_y + d;
d = (x - z2) * coeff;
x = z2 + d;
z2 = x + d;
d = (lp_y - lp_z2) * lp_coeff;
lp_y = lp_z2 + d;
lp_z2 = lp_y + d;
lpout[i] = x;
lpout[i] = lp_y;
/* All-pass sample processing. */
d = in - hp_coeff*hp_z1;
hp_y = hp_z1 + hp_coeff*d;
hp_z1 = d;
/* High-pass generated from removing low-passed output. */
hpout[i] = hp_y - lp_y;
}
splitter->lp_z1 = z1;
splitter->lp_z2 = z2;
coeff = splitter->coeff;
z1 = splitter->hp_z1;
for(i = 0;i < count;i++)
{
x = input[i];
d = x - coeff*z1;
x = z1 + coeff*d;
z1 = d;
hpout[i] = x - lpout[i];
}
splitter->hp_z1 = z1;
splitter->lp_z1 = lp_z1;
splitter->lp_z2 = lp_z2;
splitter->hp_z1 = hp_z1;
}