func GoIFFT_C(samples vlib.VectorC, N int) vlib.VectorC {
n := runtime.GOMAXPROCS(8)
if N != samples.Size() {
samples.Resize(N)
}
// fbins := vlib.NewVectorC(N)
result := vlib.NewVectorC(N)
NChannels := make([]gocomm.Complex128Channel, N)
//bigChannel := make(gocomm.Complex128Channel, N)
for i := 0; i < N; i++ {
NChannels[i] = gocomm.NewComplex128Channel()
go GoFFTPerK(NChannels[i], samples, i, N, true)
//go GoFFTPerK(bigChannel, samples, i, N, false)
}
//for i := 0; i < N; i++ {
// result[i] = (<-bigChannel).Ch
//}
for i := 0; i < N; i++ {
result[i] = (<-NChannels[i]).Ch
}
runtime.GOMAXPROCS(n)
return result
}
func IFFT_C(samples vlib.VectorC, N int) vlib.VectorC {
samples.Resize(N)
fbins := vlib.NewVectorC(N)
normalize := complex(math.Sqrt(1.0/float64(N)), 0)
result := vlib.NewVectorC(N)
for i := 0; i < N; i++ {
for n := 0; n < N; n++ {
scale := float64(i) * float64(n) / float64(N)
binf := complex(0, 2.0*math.Pi*scale)
fbins[n] = cmplx.Exp(binf)
}
// fbins = fbins.ScaleC(i)
// fmt.Print("\ni=", i, fbins)
result[i] = vlib.DotC(samples, fbins) * normalize
}
return result
}