From d7987677ac5748576626b0ed7f47d2e607bb4e77 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Fri, 26 Nov 2010 15:51:13 -0800
Subject: Subtract the fractional position separately

---
 Alc/mixer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Alc/mixer.c b/Alc/mixer.c
index b1ad0771..53ba4aca 100644
--- a/Alc/mixer.c
+++ b/Alc/mixer.c
@@ -855,8 +855,9 @@ ALvoid MixSource(ALsource *Source, ALCdevice *Device, ALuint SamplesToDo)
         DataSize64 -= BufferPadding+BufferPrePadding;
         DataSize64 <<= FRACTIONBITS;
         DataSize64 -= increment;
+        DataSize64 -= DataPosFrac;
 
-        BufferSize = (ALuint)((DataSize64-DataPosFrac+(increment-1)) / increment);
+        BufferSize = (ALuint)((DataSize64+(increment-1)) / increment);
         BufferSize = min(BufferSize, (SamplesToDo-OutPos));
         if(BufferSize == 0)
         {
-- 
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