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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QMainWindow>
+#include <QtDeclarative>
+#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