Home · All Classes · All Functions · Overviews

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

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, 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.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at [email protected].
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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();

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

     bool           pullMode;

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

     char*          buffer;

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