60941c2741
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef AUDIOOUTPUT_H
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#define AUDIOOUTPUT_H
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#include <math.h>
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#include <QObject>
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#include <QMainWindow>
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#include <QIODevice>
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#include <QTimer>
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#include <QPushButton>
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#include <QComboBox>
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#include <QByteArray>
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#include <QAudioOutput>
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class Generator : public QIODevice
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{
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Q_OBJECT
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public:
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Generator(const QAudioFormat &format, qint64 durationUs, int frequency, QObject *parent);
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~Generator();
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void start();
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void stop();
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qint64 readData(char *data, qint64 maxlen);
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qint64 writeData(const char *data, qint64 len);
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qint64 bytesAvailable() const;
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private:
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void generateData(const QAudioFormat &format, qint64 durationUs, int frequency);
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private:
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qint64 m_pos;
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QByteArray m_buffer;
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};
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class AudioTest : public QMainWindow
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{
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Q_OBJECT
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public:
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AudioTest();
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~AudioTest();
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private:
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void initializeWindow();
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void initializeAudio();
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void createAudioOutput();
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private:
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QTimer* m_pullTimer;
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// Owned by layout
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QPushButton* m_modeButton;
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QPushButton* m_suspendResumeButton;
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QComboBox* m_deviceBox;
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QAudioDeviceInfo m_device;
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Generator* m_generator;
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QAudioOutput* m_audioOutput;
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QIODevice* m_output; // not owned
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QAudioFormat m_format;
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bool m_pullMode;
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QByteArray m_buffer;
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static const QString PushModeLabel;
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static const QString PullModeLabel;
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static const QString SuspendLabel;
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static const QString ResumeLabel;
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private slots:
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void notified();
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void pullTimerExpired();
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void toggleMode();
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void toggleSuspendResume();
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void stateChanged(QAudio::State state);
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void deviceChanged(int index);
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};
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#endif
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