/*

* 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