--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommscontroller/mmccvideosourcesink/inc/mccvideosourcekeyretriever.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,123 @@
+/*
+* 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:    
+*
+*/
+
+
+
+#ifndef MCCVIDEOSOURCEKEYRETRIEVER_H
+#define MCCVIDEOSOURCEKEYRETRIEVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include <mmf/server/mmfdatasink.h>
+#include "mmccevents.h"
+#include "mcccamerahandler.h"
+
+// FORWARD DECLARATIONS
+class CMccVideoSourceImpl;
+class CMccPeriodicRunner;
+
+// CONSTANTS
+const TInt KMccKeyRetrieveGuardTimeoutMicrosecs = 10000000; // 10 secs
+
+// CLASS DECLARATION
+
+/**
+* Class used to fecth encoder configuration information.
+* It wraps long taking asynchronous calls behind one sync function call.
+* Operation has guard timer if fetching takes too long.
+*
+*/
+class CMccVideoSourceConfigKeyRetriever : 
+    public CBase, public MDataSink, public MAsyncEventHandler
+    {
+public:
+
+    static CMccVideoSourceConfigKeyRetriever* NewLC( MMccCameraHandler& aCameraHandler );
+    
+    ~CMccVideoSourceConfigKeyRetriever();
+    
+    /**
+    * Fetch config info. If operation takes too long, it is interrupted
+    * and key retrieval fails
+    */
+    void RetrieveL( const TMccCodecInfo& aVideoCodec, TDes8& aConfigKey );
+
+public: // From MDataSink
+
+    TFourCC SinkDataTypeCode( TMediaId aMediaId );   
+     
+    void EmptyBufferL( CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId );
+    
+    void BufferFilledL( CMMFBuffer* aBuffer );
+    
+    TBool CanCreateSinkBuffer(); 
+    
+    CMMFBuffer* CreateSinkBufferL( TMediaId aMediaId, TBool &aReference );
+    
+    void ConstructSinkL( const TDesC8& aInitData );
+        
+public: // From MAsyncEventHandler
+
+    TInt SendEventToClient( const TMMFEvent& aEvent );
+
+private:
+
+    void ConstructL();
+
+    CMccVideoSourceConfigKeyRetriever( MMccCameraHandler& aCameraHandler );
+    
+    void HandleEventL( TMccEvent& aEvent );
+    
+    void HandleError();
+    
+    void StopWaiting();
+    
+    void StartGuardTimer();
+    
+    void StopGuardTimer();
+    
+    static TInt GuardTimerExpired( TAny* aObject );
+    
+private:
+
+    MMccCameraHandler& iCameraHandler;   
+    
+    CActiveSchedulerWait* iWait;   
+    
+    CMccVideoSourceImpl* iSource;
+    
+    CMMFDataBuffer* iBuffer;
+    
+    TBool iFailed;
+    
+    CMccPeriodicRunner* iGuardTimer;
+    
+    TInt iGuardTimerTimeout;
+
+    #ifdef TEST_EUNIT
+		friend class UT_CMccVideoSourceImpl;
+		friend class UT_CMccVideoSourceKeyRetriever;	
+    #endif
+   		      
+    };
+    
+
+#endif 
+
+
+// End of file
+