videofeeds/clientapi/inc/CIptvServices.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 20:21:12 +0200
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:    A class holding several CIptvService objects in a binary form.*
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*/
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#ifndef CIPTVSERVICES_H
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#define CIPTVSERVICES_H
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//  INCLUDES
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#include <e32base.h>
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#include <s32mem.h>
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// CONSTANTS
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// MACROS
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// DATA TYPES
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// FUNCTION PROTOTYPES
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// FORWARD DECLARATIONS
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class CIptvService;
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// CLASS DECLARATION
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/**
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* Holds several CIptvService objects in a binary form. This class is good for handling
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* large number of CIptvService objects in a memory saving manner. Provides methods
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* for adding a new service and referencing to them.
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*/
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class CIptvServices : public CBase
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    {
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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        */
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        IMPORT_C static CIptvServices* NewL();
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        /**
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        * Destructor.
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        */
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        IMPORT_C virtual ~CIptvServices();
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    public: // New functions
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        /**
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         * Creates CIptvService instance from aIndex position.
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         * Notice that CIptvService object is constructed from binary data
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         * and is somewhat CPU extensive. On the other hand, CIptvService
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         * class uses lots of memory, so it's recommended not to
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         * have too many of them loaded at the same time.
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         * Caller is responsible for freeing the returned CIptvService pointer.
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         *
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         * @param aIndex Position in CIptvServices private services array.
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         * @return       Pointer to CIptvService class, If service is not found, NULL is returned.
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         */
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        IMPORT_C CIptvService* GetServiceL(TUint32 aIndex);
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        /**
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         * Gets reference to CIptvService instance from aIndex position.
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         * Notice that CIptvService object is constructed from binary data
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         * and is somewhat CPU extensive. Memory allocation is not performed, so
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         * this is ligher operation than "CIptvService* GetServiceL(TUint32 aIndex)"
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         * -method. This method is good for quick browsing through services.
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         * Changing this reference will not change CIptvServices binary data.
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         *
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         * @param aIndex Position in CIptvServices private services array.
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         * @return       Reference to CIptvService class, if service is not found, leave occurs.
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         */
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        IMPORT_C CIptvService& GetServiceRefL(TUint32 aIndex);
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        /**
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         * Returns reference to CIptvService instance from aIndex position.
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         * Notice that CIptvService object is constructed from binary data
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         * and is somewhat CPU extensive. Memory allocation is not performed, so
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         * this is ligher operation than "CIptvService* GetServiceL(TUint32 aIndex)"
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         * -method. This method is good for quick browsing through services.
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         * Changing this reference will not change CIptvServices binary data.
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         *
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         * @param aIndex Position in CIptvServices private services array.
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         * @param aError Will contain KErrNone if service found and returned
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         *               successfully. If != KErrNone, then return reference
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         *               does not contain valid data.
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         * @return       Reference to CIptvService class.
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         */
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        IMPORT_C CIptvService& CIptvServices::Service( TUint32 aIndex, TInt& aError );        
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        /**
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         * Adds a service.
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         *
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         * @param aService Service to add.
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         * @return         System-wide error code.
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         */        
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        IMPORT_C TInt AddL(CIptvService& aService);
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        /**
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         * Service count hold by this object.
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         *
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         * @return Service count.
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         */        
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        IMPORT_C TInt Count();
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        /**
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         * Serializes this object from aStream.
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         *
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         * @param aStream Stream to read from.
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         */        
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        IMPORT_C void InternalizeL(RDesReadStream& aStream);
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        /**
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         * Serializes this object to aStream.
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         *
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         * @param aStream Stream to write to.
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         */        
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        IMPORT_C void ExternalizeL(RDesWriteStream& aStream) const;
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        /**
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         * Returns the size of the memoryblock needed for ExternalizeL call.
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         *
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         * @param Memory block size in bytes.
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         */        
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        IMPORT_C TUint32 CountExternalizeSize();
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    private:
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        /**
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        * C++ default constructor.
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        */
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        CIptvServices();
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        /**
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        * By default Symbian 2nd phase constructor is private.
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        */
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        void ConstructL();
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    private:    // Data
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        /**
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        * CIptvService classes in binary form.
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        */
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        RArray<HBufC8*> iServices;
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        /**
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        * Used for offering references to iServices array.
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        */
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        CIptvService*   iService;
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    };
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#endif      // CIPTVSERVICES_H
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// End of File