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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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 Nokia Corporation 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 AUDIOOUTPUT_H
#define AUDIOOUTPUT_H
#include <math.h>
#include <QObject>
#include <QMainWindow>
#include <QLabel>
#include <QSlider>
#include <QIODevice>
#include <QTimer>
#include <QPushButton>
#include <QComboBox>
#include <QByteArray>
#include <qaudiooutput.h>
class Generator : public QIODevice
{
Q_OBJECT
public:
Generator(const QAudioFormat &format, qint64 durationUs, int frequency, QObject *parent);
~Generator();
void start();
void stop();
qint64 readData(char *data, qint64 maxlen);
qint64 writeData(const char *data, qint64 len);
qint64 bytesAvailable() const;
private:
void generateData(const QAudioFormat &format, qint64 durationUs, int frequency);
private:
qint64 m_pos;
QByteArray m_buffer;
};
class AudioTest : public QMainWindow
{
Q_OBJECT
public:
AudioTest();
~AudioTest();
private:
void initializeWindow();
void initializeAudio();
void createAudioOutput();
private:
QTimer* m_pullTimer;
// Owned by layout
QPushButton* m_modeButton;
QPushButton* m_suspendResumeButton;
QComboBox* m_deviceBox;
QLabel* m_volumeLabel;
QSlider* m_volumeSlider;
QAudioDeviceInfo m_device;
Generator* m_generator;
QAudioOutput* m_audioOutput;
QIODevice* m_output; // not owned
QAudioFormat m_format;
bool m_pullMode;
QByteArray m_buffer;
private slots:
void notified();
void pullTimerExpired();
void toggleMode();
void toggleSuspendResume();
void stateChanged(QAudio::State state);
void deviceChanged(int index);
void volumeChanged(int);
};
#endif
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