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/*
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* Copyright (c) 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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#ifndef CRADIOACCESSORYOBSERVER_H
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#define CRADIOACCESSORYOBSERVER_H
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#include <AccessoryServer.h>
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#include <AccessoryConnection.h>
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#include <AccPolSubblockNameArray.h>
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class MRadioHeadsetEventObserver;
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/**
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* Observer of accessory states.
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*
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* Instance of this class observes notifications of headset state changes.
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* In its turn it sends notifications to its observer of those changes.
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*
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*/
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NONSHARABLE_CLASS( CRadioAccessoryObserver ): public CActive
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{
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public:
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/**
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* C++ default constructor.
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*/
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CRadioAccessoryObserver();
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/**
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* Static constructor.
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*/
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static CRadioAccessoryObserver* NewL();
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/**
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* Destructor.
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*/
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virtual ~CRadioAccessoryObserver();
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/**
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* Sets observer. The observer will be notified when headset has been
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* pressed or headset is connected/disconnected.
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*
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* @param aObserver Observer
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*/
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void SetObserver( MRadioHeadsetEventObserver* aObserver );
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/**
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* Tells if there is a headset connected.
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*
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* @return <code>ETrue </code> if headset accessory is connected,
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* <code>EFalse</code> otherwise
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*/
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TBool IsHeadsetConnectedL() const;
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// from base class CActive
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/**
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* From CActive
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*
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* @see CActive::RunL()
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*/
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void RunL();
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/**
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* From CActive
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*
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* @see CActive::DoCancel()
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*/
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void DoCancel();
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private:
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/**
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* Finds an accessory. All wired and bluetooth accessories are taken into account.
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*
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* @param aAcceptOnlyHeadset If ETrue, search is succesful only if there is a headset connected.
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* @param aOutputType The output type of the found accessory ( private/public )
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* @return ETrue, if suitable accessory was found, EFalse otherwise
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*/
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TBool FindAccessoryL( TBool aAcceptOnlyHeadset, TAccAudioOutPutType& aOutputType ) const;
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/**
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* Tells whether the given accessory is a lineout ( and not a headset ).
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*
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* @param aAccPolGenId The accessory being investigated.
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* @return ETrue if the accessory is a lineout, EFalse otherwise.
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*/
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TBool IsLineoutConnectedL( TAccPolGenericID& aAccPolGenId ) const;
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private:
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/**
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* By default Symbian 2nd phase constructor is private.
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*
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* @param aAccessoryServer Existing session for The Accessory Server.
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*/
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void ConstructL();
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private:
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/**
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* Updates the set of known accessories.
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* Method also informs the caller about added/removed accessories.
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*
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* @param aNroChangedAccessories On return contains the number of added/removed accessories.
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*/
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void UpdateCurrentAccessoriesL( TInt& aNroChangedAccessories );
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/**
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* Counts the removed accessories.
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*
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* @return The number of removed accessories.
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*/
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TInt CountRemovedAccessoriesL() const;
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/**
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* Counts the added accessories.
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*
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* @return The number of added accessories.
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*/
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TInt CountAddedAccessoriesL() const;
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private:
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/**
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* Instance that gets notifications of the headset state changes
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* Not owned.
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*/
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MRadioHeadsetEventObserver* iObserver;
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/**
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* Session for The Accessory Server.
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* Owned.
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*/
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RAccessoryServer iAccessoryServer;
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/**
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* Accessory Connection.
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* Owned.
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*/
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RAccessoryConnection iAccessoryConn;
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/**
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* Known set of accessories. CRadioAccessoryObserver uses this set to deduce
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* which accessory has been removed ( or added ) and whether or not it was an acceptable accessory.
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* Owned.
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*/
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RArray<TAccPolGenericID> iSavedAccessories;
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/**
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* Array of connected accessories.
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*/
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TAccPolGenericIDArray iAccPolGenIdArr;
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};
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#endif // CRADIOACCESSORYOBSERVER_H
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