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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef AUDIOINPUT_H
#define AUDIOINPUT_H

#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;
};

#endif