/*

* 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:  Video Source subsystem.

*

*/

#ifndef CVSCONTROLLERIMP_H

#define CVSCONTROLLERIMP_H

// INCLUDE FILES

#include "CApiVideoSource.h"

// CLASS DECLARATIONS

/**

*  Internal implementation of controller. This class is inherited from

*  public controller interface.

*

*  @lib videosource.lib

*/

class CVSControllerImp : public CVSController

    {

    public: // Constructors and destructor

        /**

        * Static factory function to create controller instance.

        * @exception Can leave with one of the system wide error codes.

        * @return Pointer to new controller instance.

        */

        static CVSControllerImp* NewL();

        /**

        * Destructor.

        */

        ~CVSControllerImp();

    public: // New functions

    public: // Functions from base classes

        /**

        * Create data source instance.

        * @param "aObserver" Pointer to data source observer.

        * @exception Can leave with one of the system wide error codes.

        * @return Pointer to new data source instance.

        */

        virtual CVSDataSource* CreateDataSourceL( 

            MVSDataSourceObserver* aObserver );

        /**

        * Return provider count and provider index.

        * @return Number of providers available. Count also acts as zero 

        * based provider index.

        */

        virtual TInt ProvidersAvailable();

        /**

        * Return provider information.

        * @param "aProviderIndex" Index of the provider to return information 

        * for.

        * @param "aInfo" Reference to the variable where the provider 

        * information is copied.

        * @exception Can leave with one of the system wide error codes.

        */

        virtual void ProviderInfoL( 

            TInt aProviderIndex, 

            TVSDataProviderInfo& aInfo );

        /**

        * Create provider instance.

        * @param "aProviderIndex" Index of the provider to be created.

        * @param "aObserver" Pointer to provider observer.

        * @exception Can leave with one of the system wide error codes.

        * @return Pointer to new provider instance.

        */

        virtual CVSDataProvider* CreateDataProviderL( 

            TInt aProviderIndex, 

            MVSDataProviderObserver* aObserver, 

            MVSBufferPool* aPool );

    protected:  // New functions

    protected:  // Functions from base classes

    private:    // Constructors and destructor

        /**

        * 2nd phase constructor.

        * @param "aObserver" Pointer to controller observer

        * @exception Can leave with one of the system wide error codes.

        */

        void ConstructL( MVSControllerObserver* aObserver );

    private:    // New functions

    private:    // Functions from base classes

    public: // Data

    protected:  // Data

    private:    // Data

    };

#endif      // CVSCONTROLLERIMP_H  

// End of File