1 /*

     2 * Copyright (c) 2007,2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Observer for generic upnp volume state machine

    15 *

    16 */

    17 

    18 

    19 #ifndef C_UPNPVOLUMESTATEMACHINEOBSERVER_H

    20 #define C_UPNPVOLUMESTATEMACHINEOBSERVER_H

    21 

    22 // INCLUDES

    23 #include <e32base.h>

    24 

    25 

    26 /**

    27  * Class for receiving callbacks from

    28  * CUPnPVolumeStateMachine

    29  *

    30  * @lib upnpavcontrollerhelper.lib

    31  */

    32 class MUpnpVolumeStateMachineObserver

    33     {

    34 

    35 public:

    36 

    37     /**

    38      * Indicates state machine has been synchronised with the renderer

    39      * @param aError error that occurred during sync

    40      */

    41     virtual void VolumeSyncReady( TInt aError ) = 0;

    42 

    43     /**

    44      * Indicates volume state has been changed

    45      * either by request or spontanelously.

    46      * @param aError the error code

    47      * @param aRenderingSession for playback commands

    48      * @param aUserOriented ETrue if this responds to a request

    49      */

    50     virtual void VolumeChanged(

    51         TInt aError, TInt aVolume, TBool aUserOriented ) = 0;

    52 

    53     /**

    54      * Indicates mute state has been changed

    55      * either by request or spontanelously.

    56      * @param aError the error code

    57      * @param aMuteState current mute state

    58      * @param aUserOriented ETrue if this responds to a request

    59      */

    60     virtual void MuteChanged(

    61         TInt aError, TBool aMuteState, TBool aUserOriented ) = 0;

    62 

    63     };

    64 

    65 

    66 #endif // C_UPNPVOLUMESTATEMACHINEOBSERVER_H

    67