fftw_execute_dft_c2r()

void fftw_execute_dft_c2r( const fftw_plan p, fftw_complex *in, double *out);

This function is one of the new-array execute functions in FFTW 3.3.7. When using this function, be careful that the input array changes. It is a side-effect of the c2r algorithms that they are hard to implement efficiently without overwriting the input.

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