/****************************************************************************

**

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

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

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

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include <QPixmap>

#include <QWidget>

#include <QObject>

#include <QMainWindow>

#include <QPushButton>

#include <QComboBox>

#include <QByteArray>

#include <qaudioinput.h>

class AudioInfo : public QIODevice

{

    Q_OBJECT

public:

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

    ~AudioInfo();

    void start();

    void stop();

    qreal level() const { return m_level; }

    qint64 readData(char *data, qint64 maxlen);

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

private:

    const QAudioFormat m_format;

    quint16 m_maxAmplitude;

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

signals:

    void update();

};

class RenderArea : public QWidget

{

    Q_OBJECT

public:

    RenderArea(QWidget *parent = 0);

    void setLevel(qreal value);

protected:

    void paintEvent(QPaintEvent *event);

private:

    qreal m_level;

    QPixmap m_pixmap;

};

class InputTest : public QMainWindow

{

    Q_OBJECT

public:

    InputTest();

    ~InputTest();

private:

    void initializeWindow();

    void initializeAudio();

    void createAudioInput();

private slots:

    void refreshDisplay();

    void notified();

    void readMore();

    void toggleMode();

    void toggleSuspend();

    void stateChanged(QAudio::State state);

    void deviceChanged(int index);

private:

    // Owned by layout

    RenderArea *m_canvas;

    QPushButton *m_modeButton;

    QPushButton *m_suspendResumeButton;

    QComboBox *m_deviceBox;

    QAudioDeviceInfo m_device;

    AudioInfo *m_audioInfo;

    QAudioFormat m_format;

    QAudioInput *m_audioInput;

    QIODevice *m_input;

    bool m_pullMode;

    QByteArray m_buffer;

    static const QString PushModeLabel;

    static const QString PullModeLabel;

    static const QString SuspendLabel;

    static const QString ResumeLabel;

};