/*
* Copyright (c) 2007,2009 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: Observer for generic upnp volume state machine
*
*/
#ifndef C_UPNPVOLUMESTATEMACHINEOBSERVER_H
#define C_UPNPVOLUMESTATEMACHINEOBSERVER_H
// INCLUDES
#include <e32base.h>
/**
* Class for receiving callbacks from
* CUPnPVolumeStateMachine
*
* @lib upnpavcontrollerhelper.lib
*/
class MUpnpVolumeStateMachineObserver
{
public:
/**
* Indicates state machine has been synchronised with the renderer
* @param aError error that occurred during sync
*/
virtual void VolumeSyncReady( TInt aError ) = 0;
/**
* Indicates volume state has been changed
* either by request or spontanelously.
* @param aError the error code
* @param aRenderingSession for playback commands
* @param aUserOriented ETrue if this responds to a request
*/
virtual void VolumeChanged(
TInt aError, TInt aVolume, TBool aUserOriented ) = 0;
/**
* Indicates mute state has been changed
* either by request or spontanelously.
* @param aError the error code
* @param aMuteState current mute state
* @param aUserOriented ETrue if this responds to a request
*/
virtual void MuteChanged(
TInt aError, TBool aMuteState, TBool aUserOriented ) = 0;
};
#endif // C_UPNPVOLUMESTATEMACHINEOBSERVER_H