/*
*
* User-callable function to allocate all necessary storage space for the fft.
*
* The return value is a contiguous block of memory, allocated with malloc. As such,
* It can be freed with free(), rather than a kiss_fft-specific function.
* */
protected void kiss_fft_alloc(int nfft, bool inverse_fft)
{
Twiddles = new kiss_fft_cpx <kiss_fft_scalar> [nfft];
int i;
Nfft = nfft;
Inverse = inverse_fft;
for (i = 0; i < nfft; ++i)
{
const double pi = 3.141592653589793238462643383279502884197169399375105820974944;
double phase = -2 * pi * i / nfft;
if (Inverse)
{
phase *= -1;
}
Twiddles[i] = A.Exp(phase);
}
kf_factor(nfft, new Array <int>(Factors));
}