From 117ed52091a2a24d912c51a8a1c3a97cc5f4d4d5 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Fri, 24 Sep 2010 13:16:09 -0700
Subject: [PATCH] Better protect against negative attenuation

---
 Alc/ALu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Alc/ALu.c b/Alc/ALu.c
index d54b9f09..1299e98c 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -396,12 +396,15 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
                 break;
             //fall-through
         case AL_LINEAR_DISTANCE:
-            Distance=__min(Distance,MaxDist);
             if(MaxDist != MinDist)
             {
                 flAttenuation = 1.0f - (Rolloff*(Distance-MinDist)/(MaxDist - MinDist));
+                flAttenuation = __max(flAttenuation, 0.0f);
                 for(i = 0;i < NumSends;i++)
+                {
                     RoomAttenuation[i] = 1.0f - (RoomRolloff[i]*(Distance-MinDist)/(MaxDist - MinDist));
+                    RoomAttenuation[i] = __max(RoomAttenuation[i], 0.0f);
+                }
             }
             break;
 
-- 
2.11.4.GIT