e88da21a20
Maybe it's just me, but every time I try to read the "toggleMode" method in the audio output example, I get confused on whether I'm switching to/ from push/pull mode, and even what pushing and pulling entails. The name of the push timer also seemed backwards (which added to the confusion). Change-Id: I5ff7d18f72490c22b91a948ad7513b402a01c5e4 Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>
121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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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 The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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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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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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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 <QAudioOutput>
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#include <QByteArray>
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#include <QComboBox>
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#include <QIODevice>
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#include <QLabel>
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#include <QMainWindow>
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#include <QObject>
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#include <QPushButton>
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#include <QSlider>
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#include <QTimer>
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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 sampleRate, 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 sampleRate);
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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_pushTimer;
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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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QLabel *m_volumeLabel;
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QSlider *m_volumeSlider;
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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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private slots:
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void pushTimerExpired();
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void toggleMode();
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void toggleSuspendResume();
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void deviceChanged(int index);
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void volumeChanged(int);
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};
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#endif // AUDIOOUTPUT_H
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