mmfenh/enhancedmediaclient/Client/src/Components/EffectBase/EffectControlBase.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:08:46 +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 "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:  Header of EffectControlBase class.
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*
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*/
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#ifndef C_CEFFECTCONTROLBASE_H
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#define C_CEFFECTCONTROLBASE_H
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#include <e32base.h>
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#include <mmfcontrollerframework.h>
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class MCustomCommand;
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namespace multimedia
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    {
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    class MStreamControl;
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    class MControlObserver;
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    class MEffectControl;
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    class CEffectControlBaseImpl;
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    class CEffectControlBase
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        {
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    protected:
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        // Called by subclass
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        CEffectControlBase();
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        // Has to be called by subclass
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        void ConstructL( TUid aCIUid );
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        // Returns ETrue if connected to Message Handler else EFalse
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        TBool IsConnected();
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        // Returns KErrNone if it is already connected to message handler
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        // or connected to message handler successfully.
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        TInt Connect();
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        // Used by sub-classes for sending custom commands to Message Handler
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        // Returns KErrNotReady if not connected
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        TInt CustomCommandSync( TInt aFunction,
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                                const TDesC8& aDataTo1,
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                                const TDesC8& aDataTo2,
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                                TDes8& aDataFrom);
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        // Returns KErrNotReady if not connected
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        TInt CustomCommandSync( TInt aFunction,
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                                const TDesC8& aDataTo1,
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                                const TDesC8& aDataTo2);
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        // Client is signalled with KErrNotReady if not connected
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        void CustomCommandAsync( TInt aFunction,
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                                 const TDesC8& aDataTo1,
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                                 const TDesC8& aDataTo2,
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                                 TDes8& aDataFrom,
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                                 TRequestStatus& aStatus);
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        // Client is signalled with KErrNotReady if not connected
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        void CustomCommandAsync( TInt aFunction,
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                                 const TDesC8& aDataTo1,
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                                 const TDesC8& aDataTo2,
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                                 TRequestStatus& aStatus);
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        // Used by sub-classes for sending custom commands to known destination
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        // This is intended for objects implementing custom commands who
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        // knows destination address
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        TInt CustomCommandSync( const TMMFMessageDestinationPckg& aDestination,
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                                TInt aFunction,
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                                const TDesC8& aDataTo1,
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                                const TDesC8& aDataTo2,
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                                TDes8& aDataFrom );
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        TInt CustomCommandSync( const TMMFMessageDestinationPckg& aDestination,
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                                TInt aFunction,
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                                const TDesC8& aDataTo1,
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                                const TDesC8& aDataTo2 );
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        void CustomCommandAsync( const TMMFMessageDestinationPckg& aDestination,
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                                 TInt aFunction,
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                                 const TDesC8& aDataTo1,
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                                 const TDesC8& aDataTo2,
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                                 TDes8& aDataFrom,
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                                 TRequestStatus& aStatus );
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        void CustomCommandAsync( const TMMFMessageDestinationPckg& aDestination,
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                                 TInt aFunction,
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                                 const TDesC8& aDataTo1,
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                                 const TDesC8& aDataTo2,
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                                 TRequestStatus& aStatus );
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		TInt GetMessageHandle(TMMFMessageDestinationPckg &aPckg);
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		MCustomCommand* GetCustomCommand();
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    public:
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        virtual ~CEffectControlBase();
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        // Called by Stream Control when Effect Control is added to it
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        TInt GetControlObserver( MControlObserver*& aObserver );
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        // Called by Stream Control when Effect Control is added to it
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        TInt AddedToStreamControl( MStreamControl& aStreamControl,
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                                   MCustomCommand& aCustomCommand,
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                                   MEffectControl& aEffect );
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        // Called by Stream Control when Effect Control is removed to it
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        TInt RemovedFromStreamControl( MStreamControl& aStreamControl );
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        // Called by Stream Control when it is deleted before removing Effect Control
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        void StreamControlDeleted( MStreamControl& aStreamControl );
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        // Returns KErrNone if it is not connected to message handler
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        // or disconnected from Message Handler successfully.
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        TInt Disconnect();
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    public:
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        enum TEffectControlEvent
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            {
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            ECIBuilderCreated,
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            EMessageHandlerDeleted
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            };
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    public:
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        // Handles effect control event. The derived class must implement to
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        // handle the event.
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        virtual void Event( TEffectControlEvent aEvent );
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    private:
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        CEffectControlBaseImpl* iCEffectControlBaseImpl;
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        };
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    } // namespace multimedia
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#endif // C_CEFFECTCONTROLBASE_H
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// End of file