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+/****************************************************************************
+**
+** Copyright (C) 2012 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 AUDIOOUTPUT_H
+#define AUDIOOUTPUT_H
+
+#include <math.h>
+
+#include <QAudioOutput>
+#include <QByteArray>
+#include <QComboBox>
+#include <QIODevice>
+#include <QLabel>
+#include <QMainWindow>
+#include <QObject>
+#include <QPushButton>
+#include <QSlider>
+#include <QTimer>
+
+class Generator : public QIODevice
+{
+ Q_OBJECT
+
+public:
+ Generator(const QAudioFormat &format, qint64 durationUs, int sampleRate, 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 sampleRate);
+
+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 // AUDIOOUTPUT_H