1 /*  This file is part of the KDE project.

     2 

     3 Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 

     5 This library is free software: you can redistribute it and/or modify

     6 it under the terms of the GNU Lesser General Public License as published by

     7 the Free Software Foundation, either version 2.1 or 3 of the License.

     8 

     9 This library is distributed in the hope that it will be useful,

    10 but WITHOUT ANY WARRANTY; without even the implied warranty of

    11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12 GNU Lesser General Public License for more details.

    13 

    14 You should have received a copy of the GNU Lesser General Public License

    15 along with this library.  If not, see <http://www.gnu.org/licenses/>.

    16 

    17 */

    18 

    19 #ifndef PHONON_MMF_VOLUMEOBSERVER_H

    20 #define PHONON_MMF_VOLUMEOBSERVER_H

    21 

    22 #include <QtGlobal>

    23 

    24 QT_BEGIN_NAMESPACE

    25 

    26 namespace Phonon

    27 {

    28 namespace MMF

    29 {

    30 /**

    31  * Interface used by AudioOutput to pass volume control commands

    32  * back along the audio path to the MediaObject.

    33  */

    34 class VolumeObserver

    35 {

    36 public:

    37     virtual void volumeChanged(qreal volume) = 0;

    38 };

    39 }

    40 }

    41 

    42 QT_END_NAMESPACE

    43 

    44 #endif