From af3b5c23c846d261b1b81528007d659d2754af7b Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sun, 9 Sep 2012 04:27:47 -0700
Subject: Try to ensure mixing samples in multiples of 4

---
 Alc/mixer.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'Alc')

diff --git a/Alc/mixer.c b/Alc/mixer.c
index e6cab3be..a7882c23 100644
--- a/Alc/mixer.c
+++ b/Alc/mixer.c
@@ -424,6 +424,11 @@ ALvoid MixSource(ALsource *Source, ALCdevice *Device, ALuint SamplesToDo)
         BufferSize = (ALuint)((DataSize64+(increment-1)) / increment);
         BufferSize = minu(BufferSize, (SamplesToDo-OutPos));
 
+        /* Some mixers like having a multiple of 4, so try to give that unless
+         * this is the last update. */
+        if(OutPos+BufferSize < SamplesToDo)
+            BufferSize &= ~3;
+
         SrcData += BufferPrePadding*NumChannels;
         for(i = 0;i < NumChannels;i++)
         {
-- 
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