Struct CpuBackend 

pub struct CpuBackend { /* private fields */ }

rustfft-based CPU backend with plans cached for low- and high-resolution grids.

Implementations

impl CpuBackend

pub fn new( low_shape: (usize, usize), high_shape: (usize, usize), ) -> Result<Self>

Creates cached FFT plans for non-zero low- and high-resolution (height, width) grids.

Trait Implementations

impl Backend for CpuBackend

fn capabilities(&self) -> BackendCapabilities

Reports memory and resident-buffer capabilities.

fn resident_backend(&self) -> Option<&dyn ResidentBackend>

Returns optional resident-buffer operations when declared by Self::capabilities.

fn fft2( &self, values: &mut [Complex64], shape: (usize, usize), direction: FftDirection, column_scratch: &mut [Complex64], ) -> Result<()>

Applies an in-place normalized 2-D FFT to a row-major host buffer.

impl Clone for CpuBackend

fn clone(&self) -> CpuBackend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ResidentBackend for CpuBackend

fn allocate_complex(&self, len: usize) -> Result<Box<dyn ComplexBuffer>>

Allocates len uninitialized or zeroed complex elements according to backend policy.

fn allocate_real(&self, len: usize) -> Result<Box<dyn RealBuffer>>

Allocates len uninitialized or zeroed real elements according to backend policy.

fn upload_complex( &self, destination: &mut dyn ComplexBuffer, source: &[Complex64], ) -> Result<()>

Copies a host complex slice into an equal-length resident buffer.

fn download_complex( &self, source: &dyn ComplexBuffer, destination: &mut [Complex64], ) -> Result<()>

Copies an equal-length resident complex buffer into a host slice.

fn upload_real( &self, destination: &mut dyn RealBuffer, source: &[f64], ) -> Result<()>

Copies a host real slice into an equal-length resident buffer.

fn download_real( &self, source: &dyn RealBuffer, destination: &mut [f64], ) -> Result<()>

Copies an equal-length resident real buffer into a host slice.

fn fft2_resident( &self, values: &mut dyn ComplexBuffer, shape: (usize, usize), direction: FftDirection, ) -> Result<()>

Applies an in-place two-dimensional FFT to values shaped (height, width).