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/**************************************************************************** ** ** 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. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ #include <math.h> #include <QObject> #include <QMainWindow> #include <QIODevice> #include <QTimer> #include <QPushButton> #include <QComboBox> #include <QByteArray> #include <QAudioOutput> 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; QAudioDeviceInfo m_device; Generator* m_generator; QAudioOutput* m_audioOutput; QIODevice* m_output; // not owned QAudioFormat m_format; bool m_pullMode; QByteArray m_buffer; static const QString PushModeLabel; static const QString PullModeLabel; static const QString SuspendLabel; static const QString ResumeLabel; private slots: void notified(); void pullTimerExpired(); void toggleMode(); void toggleSuspendResume(); void stateChanged(QAudio::State state); void deviceChanged(int index); };
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.6.3 |