update()

float fl::audio::SilenceEnvelope::update	(	bool	isSilent,
		float	currentValue,
		float	dt )

Definition at line 14 of file silence_envelope.cpp.hpp.

                                                                                      {
    if (!isSilent) {
        // Pass-through during audio; cache for decay if silence starts next frame.
        mCurrent = currentValue;
        return mCurrent;
    }
 
    // During silence — exponential decay toward target with time constant tau.
    // alpha = 1 - exp(-dt/tau) gives a proper first-order response independent
    // of dt. At dt=tau, alpha ≈ 0.632; at dt=3*tau, we've crossed 95% of the way.
    if (mConfig.decayTauSeconds <= 0.0f || dt <= 0.0f) {
        // No decay time or zero dt → snap to target immediately.
        mCurrent = mConfig.targetValue;
        return mCurrent;
    }
    const float alpha = 1.0f - fl::expf(-dt / mConfig.decayTauSeconds);
    mCurrent = mCurrent + (mConfig.targetValue - mCurrent) * alpha;
    return mCurrent;
}

References fl::expf(), fl::FL_NO_EXCEPT, isSilent, mConfig, and mCurrent.

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