Struct DownsampleCfg 

pub struct DownsampleCfg {
    pub input_rate: u32,
    pub fft1_size: usize,
    pub fft2_size: usize,
    pub tone_spacing_hz: f32,
    pub leading_pad_tones: f32,
    pub trailing_pad_tones: f32,
    pub ntones: u32,
    pub edge_taper_bins: usize,
}

Runtime parameters shared by downsample, downsample_cached, and build_fft_cache. Callers typically keep one instance per protocol.

Fields

input_rate: u32

Input sample rate in Hz (12 000 for the WSJT pipeline).

fft1_size: usize

Zero-padded forward-FFT length.

fft2_size: usize

Inverse-FFT length = output sample count per call.

tone_spacing_hz: f32

Tone spacing of the modulation in Hz (passed as the bandwidth unit so the extracted band scales with the protocol).

leading_pad_tones: f32

Bins of headroom below f0 in tone-spacing units (FT8 uses 1.5).

trailing_pad_tones: f32

Bins of headroom above f0 + (ntones-1)·tone_spacing in tone-spacing units (FT8 uses 1.5 past tone 7 → 8.5 total).

ntones: u32

Number of data tones; used together with trailing_pad_tones to determine the upper edge of the extracted band.

edge_taper_bins: usize

Length of the raised-cosine taper applied to each edge (typically 101).

Trait Implementations

impl Clone for DownsampleCfg

fn clone(&self) -> DownsampleCfg

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DownsampleCfg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for DownsampleCfg