Struct FftSpectrumAnalyzer 

pub struct FftSpectrumAnalyzer<T: Transcendental> { /* private fields */ }

FFT-based spectrum analyzer.

Transforms real input blocks into magnitude spectra via the real FFT. The window function (Hann by default) is applied before the transform.

Implementations

impl<T: Transcendental> FftSpectrumAnalyzer<T>

pub fn new(fft_size: usize) -> Self

Create a new spectrum analyzer with FFT size fft_size and Hann window.

Panics

Panics if fft_size is not a power of two.

pub fn fft_size(&self) -> usize

Returns the FFT size.

pub fn spectrum(&self) -> &[f32]

Returns the magnitude spectrum (in f32).

pub fn amplitude_at(&self, freq: f32, sample_rate: f32) -> f32

Compute the amplitude at a specific frequency.

Trait Implementations

impl<T: Transcendental> Algorithm<T> for FftSpectrumAnalyzer<T>

fn process( &mut self, input: Option<&[T]>, output: &mut [T], ) -> ProcessResult<()>

Process one block of signal.

fn reset(&mut self)

Reset the algorithm to its initial state.

fn metadata(&self) -> AlgorithmMetadata

Descriptive metadata (defaults to empty).

fn apply_command(&mut self, _value: T)

Receive a real-time command value from the control path.

fn init(&mut self, _sample_rate: f32)

Initialise the algorithm with a sample rate.

impl<T: Transcendental> Analyzer<T> for FftSpectrumAnalyzer<T>

type Output = Vec<f32>

Analysis result type

fn result(&self) -> &Self::Output

Get analysis result

fn reset_analysis(&mut self)

Reset accumulated data

impl<T: Transcendental> SpectrumAnalyzer<T> for FftSpectrumAnalyzer<T>

fn fft_size(&self) -> usize

FFT size

fn spectrum(&self) -> &[f32]

Get spectrum

fn amplitude_at(&self, freq: f32, sample_rate: f32) -> f32

Get amplitude at specific frequency