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Merge pull request #1940 from Speedy-Consoles/master

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Fix audio panning
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oy 2019-01-02 10:32:47 +01:00 committed by GitHub
parent bf97055503 f06a5eb649
commit d6cb666510
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1 changed files with 14 additions and 12 deletions
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26
src/engine/client/sound.cpp
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@ -122,21 +122,23 @@ static void Mix(short *pFinalOut, unsigned Frames)
float Dist = sqrtf((float)dx*dx+dy*dy);
if(Dist >= 0.0f && Dist < m_MaxDistance)
{
// constant panning (-3dB center)
float a = 0.5f;
if(dx < 0)
a -= (Dist/m_MaxDistance)/2.0f;
else
a += (Dist/m_MaxDistance)/2.0f;
float Lgain = sinf((1-a)*pi/2.0f);
float Rgain = sinf(a*pi/2.0f);
// linear falloff
float Falloff = 1.0f - Dist/m_MaxDistance;
Lvol = Lvol*Lgain*Falloff;
Rvol = Rvol*Rgain*Falloff;
// amplitude after falloff
float FalloffAmp = v->m_pChannel->m_Vol * Falloff;
// distribute volume to the channels depending on x difference
float Lpan = 0.5f - dx/m_MaxDistance/2.0f;
float Rpan = 1.0f - Lpan;
// apply square root to preserve sound power after panning
float LampFactor = sqrt(Lpan);
float RampFactor = sqrt(Rpan);
// volume of the channels
Lvol = FalloffAmp*LampFactor;
Rvol = FalloffAmp*RampFactor;
}
else
{