diff -r 1a6714c53019 -r cce62ebc198e radioengine/utils/inc/cradioaccessoryobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/radioengine/utils/inc/cradioaccessoryobserver.h	Tue Aug 31 15:15:02 2010 +0300
@@ -0,0 +1,170 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+
+#ifndef CRADIOACCESSORYOBSERVER_H
+#define CRADIOACCESSORYOBSERVER_H
+
+#include <AccessoryServer.h>
+#include <AccessoryConnection.h>
+#include <AccPolSubblockNameArray.h>
+
+class MRadioHeadsetEventObserver;
+
+/**
+ *  Observer of accessory states.
+ *
+ *  Instance of this class observes notifications of headset state changes.
+ *  In its turn it sends notifications to its observer of those changes.
+ *
+ */
+NONSHARABLE_CLASS( CRadioAccessoryObserver ): public CActive
+    {
+public:
+
+    /**
+     * C++ default constructor.
+     */
+    CRadioAccessoryObserver();
+
+    /**
+     * Static constructor.
+     */
+    static CRadioAccessoryObserver* NewL();
+
+    /**
+     * Destructor.
+     */
+    virtual ~CRadioAccessoryObserver();
+
+    /**
+     * Sets observer. The observer will be notified when headset has been
+     * pressed or headset is connected/disconnected.
+      *
+     * @param aObserver Observer
+     */
+    void SetObserver( MRadioHeadsetEventObserver* aObserver );
+
+    /**
+     * Tells if there is a headset connected.
+     *
+     * @return <code>ETrue </code> if headset accessory is connected,
+     * <code>EFalse</code> otherwise
+     */
+    TBool IsHeadsetConnectedL() const;
+
+// from base class CActive
+    /**
+     * From CActive
+     *
+     * @see CActive::RunL()
+     */
+    void RunL();
+
+    /**
+     * From CActive
+     *
+     * @see CActive::DoCancel()
+     */
+    void DoCancel();
+
+private:
+
+    /**
+     * Finds an accessory. All wired and bluetooth accessories are taken into account.
+     *
+     * @param aAcceptOnlyHeadset If ETrue, search is succesful only if there is a headset connected.
+     * @param aOutputType The output type of the found accessory ( private/public )
+     * @return ETrue, if suitable accessory was found, EFalse otherwise
+     */
+    TBool FindAccessoryL( TBool aAcceptOnlyHeadset, TAccAudioOutPutType& aOutputType ) const;
+
+    /**
+     * Tells whether the given accessory is a lineout ( and not a headset ).
+     *
+     * @param aAccPolGenId The accessory being investigated.
+     * @return ETrue if the accessory is a lineout, EFalse otherwise.
+     */
+    TBool IsLineoutConnectedL( TAccPolGenericID& aAccPolGenId ) const;
+
+private:
+
+    /**
+     * By default Symbian 2nd phase constructor is private.
+     *
+     * @param aAccessoryServer Existing session for The Accessory Server.
+     */
+    void ConstructL();
+
+private:
+
+    /**
+     * Updates the set of known accessories.
+     * Method also informs the caller about added/removed accessories.
+     *
+     * @param aNroChangedAccessories On return contains the number of added/removed accessories.
+     */
+    void UpdateCurrentAccessoriesL( TInt& aNroChangedAccessories );
+
+    /**
+     * Counts the removed accessories.
+     *
+     * @return The number of removed accessories.
+     */
+    TInt CountRemovedAccessoriesL() const;
+
+    /**
+     * Counts the added accessories.
+     *
+     * @return The number of added accessories.
+     */
+    TInt CountAddedAccessoriesL() const;
+
+private:
+
+    /**
+     * Instance that gets notifications of the headset state changes
+     * Not owned.
+     */
+    MRadioHeadsetEventObserver* iObserver;
+
+    /**
+     * Session for The Accessory Server.
+     * Owned.
+     */
+    RAccessoryServer iAccessoryServer;
+
+    /**
+     * Accessory Connection.
+     * Owned.
+     */
+    RAccessoryConnection iAccessoryConn;
+
+    /**
+     * Known set of accessories. CRadioAccessoryObserver uses this set to deduce
+     * which accessory has been removed ( or added ) and whether or not it was an acceptable accessory.
+     * Owned.
+     */
+    RArray<TAccPolGenericID> iSavedAccessories;
+
+    /**
+     * Array of connected accessories.
+     */
+    TAccPolGenericIDArray iAccPolGenIdArr;
+
+    };
+
+#endif // CRADIOACCESSORYOBSERVER_H