guitartuner.h Example File

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 #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