--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vtengines/videoteleng/Inc/Extensions/CVtEngExtensionBase.h	Mon Nov 23 14:47:47 2009 +0200
@@ -0,0 +1,80 @@
+/*
+* Copyright (c) 2006 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:
+*
+* Description:  Videoteleng extension base class 
+*
+*/
+
+
+#ifndef CVTENGEXTENSIONSBASE_H
+#define CVTENGEXTENSIONSBASE_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "vtengcommands.h"
+
+// FORWARD DECLARATIONS
+class CVtEngOperation;
+
+// CLASS DECLARATION
+
+/**
+*  Videoteleng extension base class.
+*
+*  @lib videoteleng.lib
+*  @since S60 v3.2
+*/
+NONSHARABLE_CLASS ( CVtEngExtensionBase ): public CBase
+    
+    {
+    public: // pure virtuals.
+        
+        /**
+        * Returns extension API interface 
+        * @return API IF as TAny pointer
+        */
+        virtual TAny* GetInterface() = 0;
+        
+        /**
+        * Handles requested extension operation
+        * @param aOp requested operation pointer
+        * @return TBool if operation succeed or not 
+        */
+        virtual TBool HandleL( CVtEngOperation* aOp ) = 0;
+        
+        /**
+        * Validates requested extension command
+        * @param aCommandId requested command identifier (TInt)
+        * @return TBool if command is valid or not 
+        */
+        virtual TBool ValidateCommand( const TVtEngCommandId aCommandId ) = 0;
+        
+        /**
+        * Gets extension UID
+        * @return extension UID
+        */
+        const TUid& Uid() const;
+        
+    protected:// Constructor.
+        /*
+        * C++ default constructor.
+        */        
+        CVtEngExtensionBase( TUid aExtensionUid );
+    
+    private:
+        
+        // Extension UID 
+        const TUid iExtensionUid;
+    };
+        
+#endif //CVTENGEXTENSIONSBASE_H