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# audioinput.h Example File
multimedia/audioinput/audioinput.h

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     #include <QPixmap>
     #include <QWidget>
     #include <QObject>
     #include <QMainWindow>
     #include <QPushButton>
     #include <QComboBox>

     #include <qaudioinput.h>

     class AudioInfo : public QIODevice
     {
         Q_OBJECT
     public:
         AudioInfo(QObject *parent, QAudioInput *device);
         ~AudioInfo();

         void start();
         void stop();

         int LinearMax();

         qint64 readData(char *data, qint64 maxlen);
         qint64 writeData(const char *data, qint64 len);

         QAudioInput *input;

     private:
         int m_maxValue;

     signals:
         void update();
     };

     class RenderArea : public QWidget
     {
         Q_OBJECT

     public:
         RenderArea(QWidget *parent = 0);

         void setLevel(int value);

     protected:
         void paintEvent(QPaintEvent *event);

     private:
         int level;
         QPixmap pixmap;
     };

     class InputTest : public QMainWindow
     {
         Q_OBJECT
     public:
         InputTest();
         ~InputTest();

     private slots:
         void refreshDisplay();
         void status();
         void readMore();
         void toggleMode();
         void toggleSuspend();
         void state(QAudio::State s);
         void deviceChanged(int idx);

     private:
         AudioInfo *audioinfo;
         QAudioDeviceInfo device;
         QAudioFormat format;
         QAudioInput *audioInput;
         QIODevice *input;
         RenderArea *canvas;

         bool pullMode;

         QPushButton *button;
         QPushButton *button2;
         QComboBox *deviceBox;

         char *buffer;
     };