def inplace_ifft(input, batch_num=1, sign=1.0):
input = inplace_fft(input, batch_num, sign)
_v.normalize(input.vcl_leaf)
return input
def ifft(input, batch_num=1, sign=1.0):
output = fft(input, batch_num, sign)
_v.normalize(output.vcl_leaf)
return output
