Function leakageRatio

tests/profile/fft_cq_compare.cpp:135–147

Spectral leakage: fraction of total energy NOT in peak bin +/- 1

// Spectral leakage: fraction of total energy NOT in peak bin +/- 1
static float leakageRatio(fl::span<const float> bins, int peak) {
    float total = 0.0f;
    float peakEnergy = 0.0f;
    for (int i = 0; i < static_cast<int>(bins.size()); i++) {
        float e = bins[i] * bins[i];
        total += e;
        if (i >= peak - 1 && i <= peak + 1) {
            peakEnergy += e;
        }
    }
    if (total <= 0.0f) return 1.0f;
    return 1.0f - (peakEnergy / total);
}

struct AccuracyResult {
    const char *modeName;