calculateTrend()

float fl::audio::detector::DynamicsAnalyzer::calculateTrend ( )

private

Definition at line 113 of file dynamics_analyzer.cpp.hpp.

                                       {
    if (mRMSHistory.size() < 10) {
        return 0.0f;  // Not enough data
    }
 
    // Use linear regression to determine trend
    // Compare recent average to older average
    fl::size halfSize = mRMSHistory.size() / 2;
 
    float recentSum = 0.0f;
    float olderSum = 0.0f;
 
    // Recent half
    for (fl::size i = 0; i < halfSize; i++) {
        fl::size idx = (mHistoryIndex + i) % mRMSHistory.size();
        olderSum += mRMSHistory[idx];
    }
 
    // Older half
    for (fl::size i = halfSize; i < mRMSHistory.size(); i++) {
        fl::size idx = (mHistoryIndex + i) % mRMSHistory.size();
        recentSum += mRMSHistory[idx];
    }
 
    float recentAvg = recentSum / halfSize;
    float olderAvg = olderSum / halfSize;
 
    // Avoid division by zero
    if (olderAvg < 1e-6f) {
        return 0.0f;
    }
 
    // Calculate normalized trend (-1 to +1)
    float rawTrend = (recentAvg - olderAvg) / olderAvg;
 
    // Clamp to reasonable range
    return fl::max(-1.0f, fl::min(1.0f, rawTrend * 5.0f));
}

References fl::max(), mHistoryIndex, fl::min(), and mRMSHistory.

Referenced by update().

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