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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    24 ** In addition, as a special exception, Nokia gives you certain additional

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QPixmap>

    43 #include <QWidget>

    44 #include <QObject>

    45 #include <QMainWindow>

    46 #include <QPushButton>

    47 #include <QComboBox>

    48 #include <QByteArray>

    49 

    50 #include <qaudioinput.h>

    51 

    52 class AudioInfo : public QIODevice

    53 {

    54     Q_OBJECT

    55 public:

    56     AudioInfo(const QAudioFormat &format, QObject *parent);

    57     ~AudioInfo();

    58 

    59     void start();

    60     void stop();

    61 

    62     qreal level() const { return m_level; }

    63 

    64     qint64 readData(char *data, qint64 maxlen);

    65     qint64 writeData(const char *data, qint64 len);

    66 

    67 private:

    68     const QAudioFormat m_format;

    69     quint16 m_maxAmplitude;

    70     qreal m_level; // 0.0 <= m_level <= 1.0

    71 

    72 signals:

    73     void update();

    74 };

    75 

    76 

    77 class RenderArea : public QWidget

    78 {

    79     Q_OBJECT

    80 

    81 public:

    82     RenderArea(QWidget *parent = 0);

    83 

    84     void setLevel(qreal value);

    85 

    86 protected:

    87     void paintEvent(QPaintEvent *event);

    88 

    89 private:

    90     qreal m_level;

    91     QPixmap m_pixmap;

    92 };

    93 

    94 class InputTest : public QMainWindow

    95 {

    96     Q_OBJECT

    97 public:

    98     InputTest();

    99     ~InputTest();

   100 

   101 private:

   102     void initializeWindow();

   103     void initializeAudio();

   104     void createAudioInput();

   105 

   106 private slots:

   107     void refreshDisplay();

   108     void notified();

   109     void readMore();

   110     void toggleMode();

   111     void toggleSuspend();

   112     void stateChanged(QAudio::State state);

   113     void deviceChanged(int index);

   114 

   115 private:

   116     // Owned by layout

   117     RenderArea *m_canvas;

   118     QPushButton *m_modeButton;

   119     QPushButton *m_suspendResumeButton;

   120     QComboBox *m_deviceBox;

   121 

   122     QAudioDeviceInfo m_device;

   123     AudioInfo *m_audioInfo;

   124     QAudioFormat m_format;

   125     QAudioInput *m_audioInput;

   126     QIODevice *m_input;

   127     bool m_pullMode;

   128     QByteArray m_buffer;

   129 

   130     static const QString PushModeLabel;

   131     static const QString PullModeLabel;

   132     static const QString SuspendLabel;

   133     static const QString ResumeLabel;

   134 };

   135