/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QPixmap>+
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#include <QWidget>+
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#include <QObject>+
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#include <QMainWindow>+
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#include <QPushButton>+
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#include <QComboBox>+
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#include <QByteArray>+
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+
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#include <qaudioinput.h>+
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+
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class AudioInfo : public QIODevice+
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{+
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    Q_OBJECT+
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public:+
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    AudioInfo(const QAudioFormat &format, QObject *parent);+
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    ~AudioInfo();+
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+
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    void start();+
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    void stop();+
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+
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    qreal level() const { return m_level; }+
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+
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    qint64 readData(char *data, qint64 maxlen);+
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    qint64 writeData(const char *data, qint64 len);+
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+
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private:+
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    const QAudioFormat m_format;+
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    quint16 m_maxAmplitude;+
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    qreal m_level; // 0.0 <= m_level <= 1.0+
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+
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signals:+
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    void update();+
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};+
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+
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+
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class RenderArea : public QWidget+
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{+
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    Q_OBJECT+
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+
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public:+
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    RenderArea(QWidget *parent = 0);+
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+
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    void setLevel(qreal value);+
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+
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protected:+
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    void paintEvent(QPaintEvent *event);+
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+
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private:+
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    qreal m_level;+
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    QPixmap m_pixmap;+
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};+
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+
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class InputTest : public QMainWindow+
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{+
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    Q_OBJECT+
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public:+
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    InputTest();+
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    ~InputTest();+
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+
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private:+
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    void initializeWindow();+
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    void initializeAudio();+
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    void createAudioInput();+
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+
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private slots:+
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    void refreshDisplay();+
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    void notified();+
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    void readMore();+
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    void toggleMode();+
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    void toggleSuspend();+
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    void stateChanged(QAudio::State state);+
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    void deviceChanged(int index);+
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+
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private:+
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    // Owned by layout+
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    RenderArea *m_canvas;+
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    QPushButton *m_modeButton;+
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    QPushButton *m_suspendResumeButton;+
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    QComboBox *m_deviceBox;+
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+
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    QAudioDeviceInfo m_device;+
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    AudioInfo *m_audioInfo;+
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    QAudioFormat m_format;+
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    QAudioInput *m_audioInput;+
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    QIODevice *m_input;+
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    bool m_pullMode;+
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    QByteArray m_buffer;+
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+
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    static const QString PushModeLabel;+
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    static const QString PullModeLabel;+
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    static const QString SuspendLabel;+
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    static const QString ResumeLabel;+
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};+
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+
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