c++fftkissfft

How would I compile Kiss_fft to use the double data type C++?

I am looking to compile KISS_FFT (Keep it simple stupid) so that it can accept an array of double as input and output an array of doubles.

KISS_FFT is a library which does a fast Fourier Transformation on a set of data and outputs the result. By default it looks like it uses the float data type.

Solution

  • You just need to define the makefile variable DATATYPE, e.g.:

    make DATATYPE=double ...

    This in turn defines the macro kiss_fft_scalar as double.

    To see this in action:

    cd test
make DATATYPE=double test