Calculate gain steps once during a source mix

1 files changed, 11 insertions, 11 deletions

diff --git a/Alc/mixer.c b/Alc/mixer.c
index 4907c72e..54ec28be 100644
--- a/Alc/mixer.c
+++ b/Alc/mixer.c
@@ -119,9 +119,6 @@ static void MixSource(ALsource *ALSource, ALCcontext *ALContext,
 
     DeviceFreq = ALContext->Device->Frequency;
 
-    rampLength = DeviceFreq * MIN_RAMP_LENGTH / 1000;
-    rampLength = max(rampLength, SamplesToDo);
-
     /* Find buffer format */
     Frequency = 0;
     Channels = 0;
@@ -175,6 +172,17 @@ static void MixSource(ALsource *ALSource, ALCcontext *ALContext,
             WetSend[i] = ALSource->WetGains[i];
     }
 
+    /* Compute the gain steps for each output channel */
+    rampLength = DeviceFreq * MIN_RAMP_LENGTH / 1000;
+    rampLength = max(rampLength, SamplesToDo);
+
+    for(i = 0;i < OUTPUTCHANNELS;i++)
+        dryGainStep[i] = (ALSource->Params.DryGains[i]-DrySend[i]) /
+                         rampLength;
+    for(i = 0;i < MAX_SENDS;i++)
+        wetGainStep[i] = (ALSource->Params.WetGains[i]-WetSend[i]) /
+                         rampLength;
+
     DryFilter = &ALSource->Params.iirFilter;
     for(i = 0;i < MAX_SENDS;i++)
     {
@@ -247,14 +255,6 @@ static void MixSource(ALsource *ALSource, ALCcontext *ALContext,
         else
             memset(&Data[DataSize*Channels], 0, (BUFFER_PADDING*Channels*Bytes));
 
-        /* Compute the gain steps for each output channel */
-        for(i = 0;i < OUTPUTCHANNELS;i++)
-            dryGainStep[i] = (ALSource->Params.DryGains[i]-DrySend[i]) /
-                             rampLength;
-        for(i = 0;i < MAX_SENDS;i++)
-            wetGainStep[i] = (ALSource->Params.WetGains[i]-WetSend[i]) /
-                             rampLength;
-
         /* Figure out how many samples we can mix. */
         DataSize64 = LoopEnd;
         DataSize64 <<= FRACTIONBITS;