GOFft
void go_fourier_fft (go_complex const *in, int n, int skip, go_complex **fourier, gboolean inverse);
go_complex const *in
int n
int skip
go_complex **fourier
gboolean inverse
void go_fourier_fftl (go_complexl const *in, int n, int skip, go_complexl **fourier, gboolean inverse);
go_complexl const *in
go_complexl **fourier