Struct realfft::ComplexToRealOdd

pub struct ComplexToRealOdd<T> { /* private fields */ }

Implementations

impl<T: FftNum> ComplexToRealOdd<T>

pub fn new(length: usize, fft_planner: &mut FftPlanner<T>) -> Self

Create a new ComplexToReal FFT for input data of a given length, and uses the given FftPlanner to build the inner FFT. Panics if the length is not odd.

Trait Implementations

impl<T: FftNum> ComplexToReal<T> for ComplexToRealOdd<T>

fn process(
    &self,
    input: &mut [Complex<T>],
    output: &mut [T]
) -> Result<(), FftError>

Transform a complex spectrum of N/2+1 (with N/2 rounded down) values and store the real result in the N long output. The input buffer is used as scratch space, so the contents of input should be considered garbage after calling. It also allocates additional scratch space as needed. An error is returned if any of the given slices has the wrong length. If the input data is invalid, meaning that one of the positions that should contain a zero holds a different value, these non-zero values are ignored and the transform is still performed. The function then returns an FftError::InputValues error to tell that the result may not be correct.

fn process_with_scratch(
    &self,
    input: &mut [Complex<T>],
    output: &mut [T],
    scratch: &mut [Complex<T>]
) -> Result<(), FftError>

Transform a complex spectrum of N/2+1 (with N/2 rounded down) values and store the real result in the N long output. The input buffer is used as scratch space, so the contents of input should be considered garbage after calling. It also uses the provided scratch vector instead of allocating, which will be faster if it is called more than once. An error is returned if any of the given slices has the wrong length. If the input data is invalid, meaning that one of the positions that should contain a zero holds a different value, these non-zero values are ignored and the transform is still performed. The function then returns an FftError::InputValues error to tell that the result may not be correct.

fn get_scratch_len(&self) -> usize

Get the length of the scratch space needed for process_with_scratch.

fn len(&self) -> usize

Get the number of points that this FFT can process.

fn make_input_vec(&self) -> Vec<Complex<T>>

Convenience method to make an input vector of the right type and length.

fn make_output_vec(&self) -> Vec<T>

Convenience method to make an output vector of the right type and length.

fn make_scratch_vec(&self) -> Vec<Complex<T>>

Convenience method to make a scratch vector of the right type and length.