diff -r 000000000000 -r 951a5db380a0 videoeditorengine/audioeditorengine/inc/ProcVisualizationAO.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/inc/ProcVisualizationAO.h	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,108 @@
+/*
+* 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:  
+*
+*/
+
+
+
+#ifndef __CPROCVISUALIZATIONAO_H__
+#define __CPROCVISUALIZATIONAO_H__
+
+#include <e32base.h>
+#include "AudSong.h"
+#include "AudObservers.h"
+
+#include "AudProcessorImpl.h"
+
+class MProcProcessObserver;
+class CProcVisProcessor;
+
+class CProcVisualizationAO : public CActive 
+    {
+
+public:
+
+    static CProcVisualizationAO* NewL();
+
+    virtual ~CProcVisualizationAO();
+        
+    /**
+    * Starts a clip visualization operation
+    * 
+    * Can leave with one of the system wide error codes
+    *
+    * Possible panic code
+    * <code>EVisualizationProcessAlreadyRunning</code>
+    *
+    * @param aClip        song to be visualized
+    * @param aSize        size of the visualization array (time resolution)
+    * @param aObserver    observer to be notified of progress
+    *
+    * @return void
+    *
+    */
+    void StartClipVisualizationL(const CAudClipInfo* aClipInfo, TInt aSize, MAudVisualizationObserver& aObserver, TInt aPriority);
+    
+    /**
+    * Cancels a visualization operation
+    * 
+    * Possible panic code
+    * <code>EVisualizationProcessNotRunning</code>
+    *
+    */    
+    void CancelVisualization();
+    
+    /**
+    * Enumeration that represents the state of this object
+    */
+    enum TVisualizationState 
+        {
+        EProcGettingClipVisualization = 100,
+        EProcVisualizationIdle
+        };
+
+protected:
+    virtual void RunL();
+    virtual void DoCancel();
+
+private:
+    
+    void ConstructL();
+
+private:
+    
+    CProcVisualizationAO();
+
+    // visualization observer 
+    MAudVisualizationObserver* iObserver;
+    
+    // visualization processor
+    CProcVisProcessor* iProcVisProcessor;
+    // visualization state
+    TVisualizationState iVisualizationState;
+    
+    // clipinfo visualized
+    const CAudClipInfo* iClipInfo;
+    
+    // visualization size
+    TInt iSize;
+    
+    // previous progress value sent to the observer
+    TInt iPreviousProgressValue;
+    };
+
+
+#endif