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 #ifndef Phonon_GSTREAMER_VOLUMEFADEREFFECT_H

    19 #define Phonon_GSTREAMER_VOLUMEFADEREFFECT_H

    20 

    21 #include "medianode.h"

    22 #include "effect.h"

    23 

    24 #include <phonon/effectinterface.h>

    25 #include <phonon/effectparameter.h>

    26 #include <phonon/volumefaderinterface.h>

    27 

    28 #include <QtCore>

    29 

    30 #include <gst/gst.h>

    31 

    32 QT_BEGIN_NAMESPACE

    33 

    34 namespace Phonon

    35 {

    36 namespace Gstreamer

    37 {

    38     class VolumeFaderEffect : public Effect, public VolumeFaderInterface

    39     {

    40         Q_OBJECT

    41         Q_INTERFACES(Phonon::VolumeFaderInterface)

    42 

    43         public:

    44             VolumeFaderEffect(Backend *backend, QObject *parent = 0);

    45             ~VolumeFaderEffect();

    46 

    47             GstElement* createEffectBin();

    48             GstElement *audioElement() { return m_effectBin; }

    49             bool event(QEvent *);

    50             void updateFade();

    51 

    52             // VolumeFaderInterface:

    53             float volume() const;

    54             void setVolume(float volume);

    55             Phonon::VolumeFaderEffect::FadeCurve fadeCurve() const;

    56             void setFadeCurve(Phonon::VolumeFaderEffect::FadeCurve fadeCurve);

    57             void fadeTo(float volume, int fadeTime);

    58 

    59             Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;

    60             int m_fadeTimer;

    61             int m_fadeDuration;

    62             float m_fadeFromVolume;

    63             float m_fadeToVolume;

    64             QTime m_fadeStartTime;

    65     };

    66 }} //namespace Phonon::Gstreamer

    67 

    68 QT_END_NAMESPACE

    69 

    70 #endif // Phonon_GSTREAMER_VOLUMEFADEREFFECT_H