bluetoothappprofiles/avrcp/nowplayingapi/public/remconnowplayingtargetbase.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 27 May 2010 13:01:44 +0300
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// Copyright (c) 2008-2009 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:
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//
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/**
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 @file
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 @publishedAll
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 @released
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*/
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#ifndef REMCONNOWPLAYINGTARGETBASE_H
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#define REMCONNOWPLAYINGTARGETBASE_H
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#include <e32base.h>
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#include <remcon/remconinterfacebase.h>
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#include <remcon/remconinterfaceif.h>
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#include <remconmediabrowsetypes.h>
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class CRemConInterfaceSelector;
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class MRemConDatabaseAwareNowPlayingTargetObserver;
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class MRemConDatabaseUnawareNowPlayingTargetObserver;
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class TRemConMessageQueue;
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/**
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A parent class for CRemConDatabaseAwareNowPlayingTarget and 
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CRemConDatabaseUnawareNowPlayingTarget.
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This class is not intended for instantiation. Clients should instead use the
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appropriate derived class - either CRemConDatabaseAwareNowPlayingTarget or
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CRemConDatabaseUnawareNowPlayingTarget.
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This class is only to be used by classes currently derived from it.
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@see CRemConDatabaseAwareNowPlayingTarget
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@see CRemConDatabaseUnawareNowPlayingTarget
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*/
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NONSHARABLE_CLASS(CRemConNowPlayingTargetBase) : public CRemConInterfaceBase,
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	                                             public MRemConInterfaceIf2
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	{
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public:
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	IMPORT_C void PlayItemResponse(TInt aErr);
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	IMPORT_C void AddToNowPlayingResponse(TInt aErr);
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	IMPORT_C void NowPlayingContentChanged();
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protected:
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	IMPORT_C virtual ~CRemConNowPlayingTargetBase();
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	CRemConNowPlayingTargetBase(CRemConInterfaceSelector& aInterfaceSelector,
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			MRemConDatabaseAwareNowPlayingTargetObserver& aObserver);
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	CRemConNowPlayingTargetBase(CRemConInterfaceSelector& aInterfaceSelector,
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			MRemConDatabaseUnawareNowPlayingTargetObserver& aObserver);
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	virtual void BaseConstructL();
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private: //From CRemConInterfaceBase
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	TAny* GetInterfaceIf(TUid aUid);
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private: //From MRemConInterfaceIf2
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	void MrcibNewMessage(TUint aOperationId,
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			const TDesC8& aData,
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			TRemConMessageSubType aMsgSubType);
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private: //Utility functions
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	void SendResponse(TUint8 aStatus, TUint aOperationId);
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	void SendError(TInt aError, TUint aOperationId);	
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	void SendNotificationResponse(TRemConMessageSubType aMsgSubType);
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	void ProcessGetStatus();
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	void ProcessGetStatusAndBeginObserving();	
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	void ProcessPlayItem(const TDesC8& aData);
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	void ProcessAddToNowPlaying(const TDesC8& aData);
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	TBool ProcessNowPlaying(const TDesC8& aData,
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			TUint aOperationId,
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			TUint64& aItem, 
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			TRemConFolderScope& aScope, 
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			TUint16& aMediaLibraryStateCookie);
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	static TInt NextMessageCb(TAny* aThis);
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	void DoNextMessage();
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	void AddToOperationQueue(TInt aOperationId, const TDesC8& aData);
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private: //Unowned
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	MRemConDatabaseAwareNowPlayingTargetObserver*	iDaObserver;
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	MRemConDatabaseUnawareNowPlayingTargetObserver*	iDuObserver;
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	CRemConInterfaceSelector&                   	iInterfaceSelector;
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private: //Owned
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	TBool                                       iNotificationPending;
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	RBuf8                                       iOutBuf;
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    TBool                                       iInProgress;
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    TRemConMessageQueue*                         iMsgQueue;
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    CAsyncCallBack*                             iNextMessageCallBack;
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	};
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#endif //REMCONNOWPLAYINGTARGETBASE_H