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This is the verbatim text of the qsound.h include file. It is provided only for illustration; the copyright remains with Trolltech.
** $Id:$
** Definition of QSound class and QAuServer internal class
** Created : 000117
** Copyright (C) 1999-2000 Trolltech AS.  All rights reserved.
** This file is part of the kernel module of the Qt GUI Toolkit.
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** LICENSE.QPL included in the packaging of this file.
** This file may be distributed and/or modified under the terms of the
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** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
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#ifndef QSOUND_H
#define QSOUND_H

#ifndef QT_H
#include "qobject.h"
#endif // QT_H

#ifndef QT_NO_SOUND

class QSoundData;
class QAuServer;
class QAuBucket;

class Q_EXPORT QSound : public QObject {
    static bool available();
    static void play(const QString& filename);

    QSound(const QString& filename, QObject* parent=0, const char* name=0);

public slots:
    void play();

    QSoundData* d;

  QAuServer is an INTERNAL class.  If you wish to provide support for
  additional audio servers, you can make a subclass of QAuServer to do
  so, HOWEVER, your class may need to be re-engineered to some degree
  with each new Qt release, including minor releases.

  QAuBucket is whatever you want.
class QAuServer : public QObject {

    QAuServer(QObject* parent, const char* name);

    virtual void play(const QString& filename);
    virtual void play(QAuBucket* id)=0;
    virtual QAuBucket* newBucket(const QString& filename)=0;
    virtual void deleteBucket(QAuBucket* id)=0;
    virtual bool okay()=0;

#endif // QT_NO_SOUND


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Qt version 2.3.10