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diff --git a/src/imports/audioengine/qsoundinstance_p.h b/src/imports/audioengine/qsoundinstance_p.h
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--- a/src/imports/audioengine/qsoundinstance_p.h
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the plugins of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QSOUNDINSTANCE_P_H
-#define QSOUNDINSTANCE_P_H
-
-//
-//  W A R N I N G
-//  -------------
-//
-// This file is not part of the Qt API.  It exists purely as an
-// implementation detail.  This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include <QVector3D>
-#include <QObject>
-#include "qsoundsource_p.h"
-
-QT_BEGIN_NAMESPACE
-
-class QDeclarativeSound;
-class QDeclarativeAudioEngine;
-
-class QSoundInstance : public QObject
-{
-    Q_OBJECT
-public:
-    explicit QSoundInstance(QObject *parent);
-    ~QSoundInstance();
-
-    void play();
-
-    enum State
-    {
-        StoppedState = QSoundSource::StoppedState,
-        PlayingState = QSoundSource::PlayingState,
-        PausedState = QSoundSource::PausedState
-    };
-    State state() const;
-
-    void setPosition(const QVector3D& position);
-    void setDirection(const QVector3D& direction);
-    void setVelocity(const QVector3D& velocity);
-
-    //this gain and pitch is used for dynamic user control during execution
-    void setGain(qreal gain);
-    void setPitch(qreal pitch);
-    void setCone(qreal innerAngle, qreal outerAngle, qreal outerGain);
-
-    //this varPitch and varGain is calculated from config in PlayVariation
-    void updateVariationParameters(qreal varPitch, qreal varGain, bool looping);
-
-    void bindSoundDescription(QDeclarativeSound *sound);
-
-    void update3DVolume(const QVector3D& listenerPosition);
-
-    bool attenuationEnabled() const;
-
-Q_SIGNALS:
-    void stateChanged(QSoundInstance::State state);
-
-public Q_SLOTS:
-    void pause();
-    void stop();
-
-private Q_SLOTS:
-    void resume();
-    void bufferReady();
-    void categoryVolumeChanged();
-    void handleSourceStateChanged(QSoundSource::State);
-
-private:
-    void setState(State state);
-    void prepareNewVariation();
-    void detach();
-    qreal categoryVolume() const;
-    void updatePitch();
-    void updateGain();
-    void updateConeOuterGain();
-
-    void sourcePlay();
-    void sourcePause();
-    void sourceStop();
-
-    QSoundSource *m_soundSource;
-    QSoundBuffer *m_bindBuffer;
-
-    QDeclarativeSound *m_sound;
-    int m_variationIndex;
-
-    bool                 m_isReady; //true if the sound source is already bound to some sound buffer
-    qreal                m_gain;
-    qreal                m_attenuationGain;
-    qreal                m_varGain;
-    qreal                m_pitch;
-    qreal                m_varPitch;
-    State                m_state;
-    qreal                m_coneOuterGain;
-
-    QDeclarativeAudioEngine *m_engine;
-};
-
-QT_END_NAMESPACE
-
-#endif // QSOUNDINSTANCE_P_H