Module fftw_backend 

FFTW-based FFT backend for high performance

Provides 62x speedup over pure Rust FFT implementation by using the industry-standard FFTW library.

Now with plan caching for even better performance on repeated transforms.

Functions

dct2_fftw

DCT Type II using FFTW with plan caching (REDFT10) This is the most commonly used DCT type

dst2_fftw

DST Type II using FFTW with plan caching (RODFT10)

fft2_fftw

2D complex-to-complex FFT using FFTW with plan caching

fft_fftw

Complex-to-complex FFT using FFTW with plan caching

idct2_fftw

IDCT Type II using FFTW with plan caching (REDFT01 = DCT-III) DCT-III is the inverse of DCT-II

idst2_fftw

IDST Type II using FFTW with plan caching (RODFT01 = DST-III)

ifft2_fftw

2D inverse complex-to-complex FFT using FFTW with plan caching

ifft_fftw

Inverse complex-to-complex FFT using FFTW with plan caching

irfft2_fftw

2D inverse real FFT using FFTW with plan caching

irfft_fftw

Inverse real FFT using FFTW with plan caching

rfft2_fftw

2D real-to-complex FFT using FFTW with plan caching

rfft_fftw

Real-to-complex FFT using FFTW with plan caching