calculateSpectralRolloff()

float fl::audio::detector::MoodAnalyzer::calculateSpectralRolloff ( const fft::Bins & fft, float threshold = 0.85f )

private

Definition at line 126 of file mood_analyzer.cpp.hpp.

                                                                                {
    float totalEnergy = 0.0f;
 
    for (size_t i = 0; i < fft.raw().size(); i++) {
        float magnitude = fft.raw()[i];
        totalEnergy += magnitude * magnitude;
    }
 
    float energyThreshold = totalEnergy * threshold;
    float cumulativeEnergy = 0.0f;
 
    for (size_t i = 0; i < fft.raw().size(); i++) {
        float magnitude = fft.raw()[i];
        cumulativeEnergy += magnitude * magnitude;
        if (cumulativeEnergy >= energyThreshold) {
            return static_cast<float>(i) / fft.raw().size();
        }
    }
 
    return 1.0f;
}

Referenced by update().

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