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diff --git a/src/multimedia/audio/qaudiodeviceid.h b/src/multimedia/audio/qaudiodeviceid.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtMultimedia module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QAUDIODEVICEID_H
+#define QAUDIODEVICEID_H
+
+#include <QtCore/qshareddata.h>
+#include <QtCore/qmetatype.h>
+
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Multimedia)
+
+
+class QAudioDeviceFactory;
+class QAudioDeviceIdPrivate;
+
+class Q_MULTIMEDIA_EXPORT QAudioDeviceId
+{
+    friend class QAudioDeviceFactory;
+    friend Q_MULTIMEDIA_EXPORT QDataStream &operator<<(QDataStream&, const QAudioDeviceId&);
+    friend Q_MULTIMEDIA_EXPORT QDataStream &operator>>(QDataStream&, QAudioDeviceId&);
+
+public:
+    QAudioDeviceId();
+    QAudioDeviceId(const QAudioDeviceId &other);
+    ~QAudioDeviceId();
+
+    QAudioDeviceId& operator=(const QAudioDeviceId &other);
+    bool operator==(const QAudioDeviceId &id) const;
+    bool operator!=(const QAudioDeviceId &id) const;
+
+    bool isNull() const;
+
+private:
+    QAudioDeviceId(QAudioDeviceIdPrivate *data);
+
+    QSharedDataPointer<QAudioDeviceIdPrivate> d;
+};
+
+#ifndef QT_NO_DATASTREAM
+Q_MULTIMEDIA_EXPORT QDataStream &operator<<(QDataStream&, const QAudioDeviceId&);
+Q_MULTIMEDIA_EXPORT QDataStream &operator>>(QDataStream&, QAudioDeviceId&);
+#endif
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+Q_DECLARE_METATYPE(QAudioDeviceId);
+
+
+#endif  // QAUDIODEVICEID_H