Function spectral_flatness_batch_sparse_fft 

pub fn spectral_flatness_batch_sparse_fft<T>(
    signals: &[Vec<T>],
    flatness_threshold: f64,
    window_size: usize,
    window_function: Option<WindowFunction>,
    device_id: Option<i32>,
    batchconfig: Option<BatchConfig>,
) -> FFTResult<Vec<SparseFFTResult>>
where
    T: NumCast + Copy + Debug + Sync + 'static,

Optimized batch processing for spectral flatness sparse FFT

This function is specialized for the spectral flatness algorithm, which can benefit from batch processing due to its signal analysis requirements.

Arguments

• signals - List of input signals
• flatness_threshold - Threshold for spectral flatness (0-1, lower = more selective)
• window_size - Size of windows for local flatness analysis
• window_function - Window function to apply before FFT
• device_id - GPU device ID (-1 for auto-select)
• batchconfig - Batch processing configuration

Returns

• Vector of sparse FFT results, one for each input signal