updateTempo()

void fl::audio::detector::Beat::updateTempo ( u32 timestamp )

private

Definition at line 138 of file beat.cpp.hpp.

                                                 {
    u32 interval = timestamp - mLastBeatTime;
 
    // Only update tempo if interval is reasonable
    if (interval >= MIN_BEAT_INTERVAL_MS && interval <= MAX_BEAT_INTERVAL_MS) {
        // Smooth tempo changes
        const float alpha = 0.2f;
        mBeatInterval = static_cast<u32>(
            alpha * static_cast<float>(interval) +
            (1.0f - alpha) * static_cast<float>(mBeatInterval)
        );
 
        // Convert interval to BPM
        float newBPM = 60000.0f / static_cast<float>(mBeatInterval);
 
        // Check if tempo changed significantly
        float bpmDiff = fl::abs(newBPM - mBPM);
        mTempoChanged = (bpmDiff > 5.0f);
 
        mBPM = newBPM;
    }
}

References fl::abs(), fl::FL_NO_EXCEPT, MAX_BEAT_INTERVAL_MS, mBeatInterval, mBPM, MIN_BEAT_INTERVAL_MS, mLastBeatTime, and mTempoChanged.

Referenced by update().

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