--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/vedengine/GenManip/src/DCDithering.cpp	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,241 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "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:
+* Ixonos Plc
+*
+* Description:  
+*
+*/
+
+
+//----IMAAMI----
+//*************************************************************************
+//DCDithering.cpp
+//
+//Version 1.00
+//
+//Contains:
+//	CDCDithering 
+//			
+//History:
+//	19.08.2003 version 1.00 created using existing IMAAMI algorithms	
+//*************************************************************************
+
+//  Include Files  
+#include <e32std.h>   // The basic definitions
+#include <fbs.h>      // For FBS bitmap
+#include "DCDithering.h"     // The DCDithering class
+
+
+
+//  MEMBER FUNCTIONS
+//=============================================================================
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+    CDCDithering
+
+    Constructor
+
+    Default constructor
+
+    Return Values:  none
+
+-----------------------------------------------------------------------------
+*/
+CDCDithering::CDCDithering()
+{
+	// This function is intentionally left blank.
+}
+
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+    CDCDithering
+
+    NewLC
+
+    Factory function to instantiate the class.
+    This function leaves the class pointer to the cleanup stack
+    May leave with KErrNoMemory if no memory available
+
+    Return Values:  CDCDithering* self:  pointer to the class instance
+
+-----------------------------------------------------------------------------
+*/
+CDCDithering* CDCDithering::NewLC()
+{
+    CDCDithering* self = new (ELeave) CDCDithering();
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    return self;
+}
+
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+    CDCDithering
+
+    NewL
+
+    Factory function to instantiate the class.
+    May leave with KErrNoMemory if no memory available
+
+    Return Values:  CDCDithering* self:  pointer to the class instance
+
+-----------------------------------------------------------------------------
+*/
+CDCDithering* CDCDithering::NewL()
+{
+    CDCDithering* self = CDCDithering::NewLC();
+    CleanupStack::Pop();
+    return self;
+}
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+    CDCDithering
+
+    ConstructL
+
+    Second phase constructor. Does nothing at the moment
+
+    Return Values:  none
+
+-----------------------------------------------------------------------------
+*/
+void CDCDithering::ConstructL()
+{
+    // This function is intentionally left blank.
+}
+
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+    CDCDithering
+
+    Destructor
+
+    Return Values:  none
+
+-----------------------------------------------------------------------------
+*/
+CDCDithering::~CDCDithering()
+{
+	// This function is intentionally left blank.
+}
+
+
+
+/*
+-----------------------------------------------------------------------------
+
+  ProcessL
+	
+  Process image referenced by aImage (modify aImage).
+  May leave with KErrNoMemory if no memory available
+	  
+  Return Values:  none
+		
+-----------------------------------------------------------------------------
+*/
+void CDCDithering::ProcessL(CFbsBitmap& aImage)
+{
+	TUint	r, g, b;	// Color components
+	TUint8*	dataPtr;	// Pointer to data
+
+	//Dithering variables, init to 0
+	TInt	count=0;	
+	TInt16	dither=0;
+	
+	//EColor16M image is needed
+	if (aImage.DisplayMode() != EColor16M || aImage.DisplayMode() != EColor16M)
+		return;
+	
+	// Line Buffer and pointer to the data
+	TUint imageWidth = aImage.SizeInPixels().iWidth;
+	TUint scanLineLengthInBytes = aImage.ScanLineLength(imageWidth, aImage.DisplayMode());
+	
+	//Allocate buffer for scanline
+	iScanLineBuffer = HBufC8::NewMaxL(scanLineLengthInBytes);
+	//Pointer to scanline
+	TPtr8 linePtr = iScanLineBuffer->Des();
+	
+	//Step through image lines
+	for (TInt lineNo=0; lineNo<aImage.SizeInPixels().iHeight; ++lineNo)
+	{
+		//Get line
+		aImage.GetScanLine(linePtr, TPoint(0, lineNo), imageWidth, aImage.DisplayMode());
+		//CHECK! CONST_CAST not used in every algorithm which way is better?
+		dataPtr = CONST_CAST(TUint8*, linePtr.Ptr());
+
+		//Step through image pixels
+		for (TUint x=0; x < imageWidth; ++x)
+		{
+			// Get original values
+			b = *dataPtr++;
+			g = *dataPtr++;
+			r = *dataPtr++;
+			
+			//Compute DCDithering factor from base count
+			switch (count&1)
+			{
+			case 0:
+				dither = (TInt16)(dither*0x7ffd);
+				break;
+			case 1:
+				dither = (TInt16)(dither+0x7f21);
+				break;
+			}
+			
+			//Add DCDithering factor, adjust gain according to quantization factors.
+			r = Limit255((TInt)r + (dither>>13));
+			g = Limit255((TInt)g - (dither>>14));
+			b = Limit255((TInt)b + (dither>>13));
+			
+			//Move to the previous pixel
+			dataPtr -= 3;
+			
+			/* Set the result */
+			*dataPtr++ = (TUint8)b;
+			*dataPtr++ = (TUint8)g;
+			*dataPtr++ = (TUint8)r;
+		
+			//Increase bae count
+			count++;
+		}
+		
+		//Set scan line
+		aImage.SetScanLine(linePtr, lineNo);
+	}
+
+	//Free allocated memory
+	delete(iScanLineBuffer);
+	iScanLineBuffer = 0;
+}
+//  End of File  
+//----IMAAMI----