diff -r a2b50a479edf -r 6df133bd92e1 radioengine/engine/api/mradioengineobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/radioengine/engine/api/mradioengineobserver.h	Fri Jun 04 10:21:36 2010 +0100
@@ -0,0 +1,74 @@
+/*
+* 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 MRADIOENGINEOBSERVER_H
+#define MRADIOENGINEOBSERVER_H
+
+// User includes
+#include "radioenginedef.h"
+
+/**
+* Observer for radio state changes.
+*/
+NONSHARABLE_CLASS( MRadioEngineObserver )
+    {
+    public:
+
+    virtual void PowerEventL( TBool aPowerState, TInt aErrorCode ) = 0;
+
+    /**
+    * Notifies when frequency changes
+    * @param aFrequency The new frequency
+    * @param aReason reason why the frequency changed
+    * @param aErrorCode code related to state change
+    */
+    virtual void FrequencyEventL( TUint32 aFrequency, RadioEngine::TRadioFrequencyEventReason aReason, TInt aErrorCode ) = 0;
+    virtual void VolumeEventL( TInt aVolume, TInt aErrorCode ) = 0;
+    virtual void MuteEventL( TBool aMuteState, TInt aErrorCode ) = 0;
+    virtual void AudioModeEventL( TInt aAudioMode, TInt aErrorCode ) = 0;
+    virtual void AntennaEventL( TBool aAntennaAttached, TInt aErrorCode ) = 0;
+
+    /**
+    * Notifies when audio routing changes
+    * @param aAudioDestination The new output device
+    * @param aErrorCode Error code related to state change
+    */
+    virtual void AudioRoutingEventL( TInt aAudioDestination, TInt aErrorCode ) = 0;
+
+    /**
+    * Notifies about seeking events
+    * @param aSeekingState The seeking state
+    * @param aErrorCode KErrNone for successful starting or completion of seeking
+    */
+    virtual void SeekingEventL( TInt aSeekingState, TInt aErrorCode ) = 0;
+
+    /**
+     * Notifies about region changes
+     *
+     * @param aRegion The ID of the new region
+     * @param aErrorCode Region event error code
+     */
+    virtual void RegionEventL( TInt aRegion, TInt aErrorCode ) = 0;
+
+    /**
+     * Notifies about fm transmitter activating
+     */
+    virtual void FmTransmitterEventL( TBool aActive ) = 0;
+
+    };
+
+#endif // MRADIOENGINEOBSERVER_H