static void drft_init(ref drft_lookup l, int n)
{
l.n = n;
l.trigcache = (float *)_ogg_calloc(3 * n, sizeof(float));
l.splitcache = (int *)_ogg_calloc(32, sizeof(int));
fdrffti(n, l.trigcache, l.splitcache);
}
static void drft_backward(ref drft_lookup l, float *data)
{
if (l.n == 1)
{
return;
}
else
{
drftb1(l.n, data, l.trigcache, l.trigcache + l.n, l.splitcache);
}
}
static void drft_clear(ref drft_lookup l)
{
if (l.trigcache != null)
{
_ogg_free(l.trigcache);
}
if (l.splitcache != null)
{
_ogg_free(l.splitcache);
}
l = default(drft_lookup);
}
