SuperFluxOnsetDetection.h

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namespace krotos
{
    //==============================================================================
    class SuperFluxOnsetDetection
    {
      public:
        SuperFluxOnsetDetection(std::vector<std::vector<float>>& logSpectrum, float sampleRate, int hopSize);
 
        void setParametersMS(float preMax, float postMax, float preAvg, float postAvg, float combWidth);
 
        void setDeltaPercentage(float deltaPrcnt);
 
        std::vector<float> trajectoryTracking(std::vector<std::vector<float>> logSpectrum);
 
        std::vector<float> calculateDetectionFunction(const std::vector<std::vector<float>>& logSpectrum,
                                                      const std::vector<float>& maxLogSpectum);
 
        std::vector<int> peakPicking(std::vector<float> detectionFunction);
 
        /* Triggers trajectory tracking and peak picking stages. */
        std::vector<int> findOnsetsInSamples();
 
      private:
        float halfWaveRect(float x) { return (x + std::abs(x)) / 2.0f; };
 
        std::vector<float> movingMax(std::vector<float> detectionFunction);
 
        std::vector<float> movingMean(std::vector<float> detectionFunction);
 
        std::vector<std::vector<float>> m_inputLogSpectrum;
 
        // Tunable threshold
        float m_deltaPrcnt{0.0f}; // TODO how to set from slider values, mean/max of
                                  // detection function etc.
        int m_preMaxFrames{0};
        int m_postMaxFrames{0};
        int m_preAvgFrames{0};
        int m_postAvgFrames{0};
        int m_combWidthFrames{0};
 
        // trajectory tracking parameter
        const int mi = 2;
        int m_numBands{0};
        int m_numFrames{0};
        float m_sampleRate{0.0f};
        int m_hopSize{0};
    };
} // namespace krotos