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_QT7_AUDIOMIXER_H

    19 #define Phonon_QT7_AUDIOMIXER_H

    20 

    21 #include <QtCore/QObject>

    22 #include <QtCore/QTime>

    23 #include <QtCore/QEvent>

    24 #include <phonon/effectinterface.h>

    25 #include <phonon/effectparameter.h>

    26 #include <phonon/volumefaderinterface.h>

    27 #include "medianode.h"

    28 #include "audionode.h"

    29 

    30 QT_BEGIN_NAMESPACE

    31 

    32 namespace Phonon

    33 {

    34 namespace QT7

    35 {

    36     class AudioMixerAudioNode : public AudioNode

    37     {

    38         public:

    39             AudioMixerAudioNode();

    40             void setVolume(float volume, int bus = 0);

    41             float volume(int bus = 0);

    42 

    43         protected:

    44             ComponentDescription getAudioNodeDescription() const;

    45             void initializeAudioUnit();

    46 

    47         private:

    48             friend class AudioMixer;

    49             int m_numberOfBusses;

    50             float m_volume;

    51     };

    52 

    53     class AudioMixer : public MediaNode, Phonon::EffectInterface, Phonon::VolumeFaderInterface

    54     {

    55         Q_OBJECT

    56         Q_INTERFACES(Phonon::EffectInterface Phonon::VolumeFaderInterface)

    57 

    58         public:

    59             AudioMixer(QObject *parent = 0);

    60             ~AudioMixer();

    61             AudioMixerAudioNode *m_audioNode;

    62             Phonon::VolumeFaderEffect::FadeCurve m_fadeCurve;

    63 

    64             int m_fadeTimer;

    65             int m_fadeDuration;

    66             float m_fadeToVolume;

    67             float m_fadeFromVolume;

    68             QTime m_fadeStartTime;

    69 

    70             // EffectInterface:

    71             QList<Phonon::EffectParameter> parameters() const;

    72             QVariant parameterValue(const Phonon::EffectParameter &parameter) const;

    73             void setParameterValue(const Phonon::EffectParameter &parameter, const QVariant &newValue);

    74 

    75             // VolumeFaderInterface:

    76             float volume() const;

    77             void setVolume(float volume);

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

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

    80             void fadeTo(float volume, int fadeTime);

    81             void updateFade();

    82 

    83         protected:

    84             bool event(QEvent *event);

    85     };

    86 

    87 }} //namespace Phonon::QT7

    88 

    89 QT_END_NAMESPACE

    90 

    91 #endif // Phonon_QT7_AUDIOMIXER_H