Trait realfft::RealToComplex

source ·

pub trait RealToComplex<T>: Sync + Send {
    // Required methods
    fn process(
        &self,
        input: &mut [T],
        output: &mut [Complex<T>]
    ) -> Result<(), FftError>;
    fn process_with_scratch(
        &self,
        input: &mut [T],
        output: &mut [Complex<T>],
        scratch: &mut [Complex<T>]
    ) -> Result<(), FftError>;
    fn get_scratch_len(&self) -> usize;
    fn len(&self) -> usize;
    fn make_input_vec(&self) -> Vec<T>;
    fn make_output_vec(&self) -> Vec<Complex<T>>;
    fn make_scratch_vec(&self) -> Vec<Complex<T>>;

    // Provided method
    fn complex_len(&self) -> usize { ... }
}

Expand description

A forward FFT that takes a real-valued input signal of length N and transforms it to a complex spectrum of length N/2+1.

Required Methods§

source

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

Transform a signal of N real-valued samples, storing the resulting complex spectrum in the N/2+1 (with N/2 rounded down) element long output slice. 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.

source

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

Transform a signal of N real-valued samples, similar to process(). The difference is that this method uses the provided scratch buffer instead of allocating new scratch space. This is faster if the same scratch buffer is used for multiple calls.

source