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diff --git a/examples/mobile/guitartuner/src/guitartuner.h b/examples/mobile/guitartuner/src/guitartuner.h
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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 1.1, 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QtQuick1>
+#include <QAudioDeviceInfo>
+#include <QAudioOutput>
+#include <QAudioInput>
+#include "voicegenerator.h"
+#include "voiceanalyzer.h"
+
+const int DataFrequencyHzOutput = 44100;
+const int DataFrequencyHzInput = 48000;
+
+#define MAX_INPUT_VALUE 50
+#define MIN_INPUT_VALUE -50
+
+class GuitarTuner : public QMainWindow
+{
+    Q_OBJECT
+public:
+    enum Orientation {
+        LockPortrait,
+        LockLandscape,
+        Auto
+    };
+    explicit GuitarTuner(QWidget *parent = 0);
+    qreal getVolume();
+    qreal getMicrophoneSensitivity();
+    bool getMuteState();
+    void setOrientation(Orientation orientation);
+
+signals:
+
+public slots:
+    void modeChanged(bool isInput);
+    void muteStateChanged(bool isMuted);
+    void targetFrequencyChanged(qreal targetFrequency);
+    void outputStateChanged(QAudio::State state);
+    void setMaxVolumeLevel(qreal);
+
+private:
+    void initAudioOutput();
+    void initAudioInput();
+    VoiceGenerator *m_voicegenerator;
+    VoiceAnalyzer *m_analyzer;
+    QObject *qmlObject;
+    QAudioOutput *m_audioOutput;
+    QAudioInput *m_audioInput;
+    QAudioFormat m_format_output;
+    QAudioFormat m_format_input;
+    QDeclarativeView *m_guitarTunerUI;
+};
+
+#endif // MAINWINDOW_H