From a5ccae57793c75c6c4162d29be0ac6c5eae8ec63 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Fri, 1 Jul 2011 02:29:10 -0700
Subject: Do air absorption with linear gain values

This copies the way the calculation is done with the wet path
---
 Alc/ALu.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

(limited to 'Alc/ALu.c')

diff --git a/Alc/ALu.c b/Alc/ALu.c
index 66cf6009..7cddb5a8 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -537,17 +537,7 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
 
     // Distance-based air absorption
     if(AirAbsorptionFactor > 0.0f && EffectiveDist > 0.0f)
-    {
-        ALfloat absorb;
-
-        // Absorption calculation is done in dB
-        absorb = (AirAbsorptionFactor*AIRABSORBGAINDBHF) *
-                 EffectiveDist;
-        // Convert dB to linear gain before applying
-        absorb = aluPow(10.0f, absorb/20.0f);
-
-        DryGainHF *= absorb;
-    }
+        DryGainHF *= aluPow(AIRABSORBGAINHF, AirAbsorptionFactor*EffectiveDist);
 
     //3. Apply directional soundcones
     Angle = aluAcos(aluDotproduct(Direction,SourceToListener)) * (180.0/M_PI);
-- 
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