--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EngSrc/IESensorDataFilter.cpp	Fri Oct 15 10:18:29 2010 +0900
@@ -0,0 +1,75 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors: Juha Kauppinen, Mika Hokkanen
+* 
+* Description: Photo Browser
+*
+*/
+
+#include "IESensorDataFilter.h"
+
+CIESensorDataFilter::CIESensorDataFilter()
+    {
+    // No implementation required
+    }
+
+CIESensorDataFilter::~CIESensorDataFilter()
+    {
+    delete iRingBuffer;
+    }
+
+CIESensorDataFilter* CIESensorDataFilter::NewLC()
+    {
+    CIESensorDataFilter* self = new (ELeave) CIESensorDataFilter();
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    return self;
+    }
+
+CIESensorDataFilter* CIESensorDataFilter::NewL()
+    {
+    CIESensorDataFilter* self = CIESensorDataFilter::NewLC();
+    CleanupStack::Pop(); // self;
+    return self;
+    }
+
+void CIESensorDataFilter::ConstructL()
+    {
+    iRingBuffer = new (ELeave) TInt[KDataBufferSize];
+    
+    memset(iRingBuffer, '\0', KDataBufferSize * sizeof (TInt));
+    
+    iRingBufferPointer = iRingBuffer;
+    
+    }
+
+TInt CIESensorDataFilter::FilterSensorData(TInt aNewValue)
+    {
+    // Returns the average of the measures inside the circular buffer avoiding the noise  
+    
+    *iRingBufferPointer = aNewValue;
+    
+    iRingBufferPointer++;
+    
+    if(iRingBufferPointer >= (iRingBuffer + (KDataBufferSize - 1 )))
+        {
+        iRingBufferPointer = iRingBuffer;
+        }
+    
+    TInt sum = 0;
+    for (TInt i = 0; i < KDataBufferSize; i++ )
+        {
+        sum = sum + iRingBuffer[i];
+        }
+        
+    return (sum / KDataBufferSize);
+    }