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Do not square energy as we are not complex. Do not clamp gain
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@ -42,7 +42,7 @@ CAGC::CAGC(float initialLeveldB)
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m_GainMin = pow(10.0f, (initialLeveldB - 10.0f)/20.0f);
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m_EnergyPrime = 1.0f;
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m_targetEnergy = 32768.0f;//TODO : Move to parameter ?
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m_targetEnergy = 32767.0f;//TODO : Move to parameter ?
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m_Bandwidth = 1e-2f;//TODO : Move to parameter ?
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m_Alpha = m_Bandwidth;
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@ -70,8 +70,8 @@ void CAGC::Apply(uint8 * voice, int size)
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// apply gain to input sample
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float output = input * m_Gain;
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// compute output signal energy
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float instantEnergy = (output * output) / m_targetEnergy;
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// compute output signal energy, scaled to 0 to 1
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float instantEnergy = abs(output) / m_targetEnergy;
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// smooth energy estimate using single-pole low-pass filter
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m_EnergyPrime = (1.0f - m_Alpha) * m_EnergyPrime + m_Alpha * instantEnergy;
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@ -81,10 +81,10 @@ void CAGC::Apply(uint8 * voice, int size)
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m_Gain *= exp( -0.5f * m_Alpha * log(m_EnergyPrime) );
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// clamp gain
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if (m_Gain > m_GainMax)
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/*if (m_Gain > m_GainMax)
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m_Gain = m_GainMax;
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else if(m_Gain < m_GainMin)
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m_Gain = m_GainMin;
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m_Gain = m_GainMin;*/
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//write processed sample back
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voice[i] = HIBYTE((short)output);
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