[WDMAUD.DRV/KMIXER] Replace a float mul/div/round operation with integer math.

[reactos.git] / reactos / drivers / wdm / audio / filters / kmixer / pin.c

diff --git a/reactos/drivers/wdm/audio/filters/kmixer/pin.c b/reactos/drivers/wdm/audio/filters/kmixer/pin.c
index d00ba04..eb2196c 100644 (file)
--- a/reactos/drivers/wdm/audio/filters/kmixer/pin.c
+++ b/reactos/drivers/wdm/audio/filters/kmixer/pin.c
@@ -59,7 +59,7 @@ PerformSampleRateConversion(
         return STATUS_INSUFFICIENT_RESOURCES;
     }
 
-    NewSamples = lrintf(((FLOAT)NumSamples * ((FLOAT)NewRate / (FLOAT)OldRate))) + 2;
+    NewSamples = ((((ULONG64)NumSamples * NewRate) + (OldRate / 2)) / OldRate) + 2;
 
     FloatOut = ExAllocatePool(NonPagedPool, NewSamples * NumChannels * sizeof(FLOAT));
     if (!FloatOut)