Struct Spectrogram

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pub struct Spectrogram {
    pub mags_sqr: Vec<f32>,
    pub n_time: usize,
    pub n_freq: usize,
    pub t_step: usize,
    pub nsps: usize,
    pub df: f32,
    pub noise_per_bin: f32,
}

Expand description

Precomputed spectrogram of an audio slot.

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§mags_sqr: Vec<f32>

Row-major |FFT|² table: mags_sqr[t * n_freq + f].

§n_time: usize§n_freq: usize§t_step: usize

Samples between consecutive time rows.

§nsps: usize

FFT window size (samples).

§df: f32

Frequency resolution (Hz per bin).

§noise_per_bin: f32

Mean squared-magnitude of “noise” bins (rough σ² estimator).

Implementations§

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impl Spectrogram

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pub fn build(audio: &[f32], sample_rate: u32) -> Self

Build a quarter-symbol spectrogram matching WSPR’s geometry at sample_rate. Empty if the audio is shorter than one symbol.

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pub fn get(&self, t: usize, f: usize) -> f32

Auto Trait Implementations§

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impl UnwindSafe for Spectrogram

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