1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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>
#include <QScopedPointer>
class Generator : public QIODevice
{
Q_OBJECT
public:
Generator(const QAudioFormat &format, qint64 durationUs, int sampleRate);
void start();
void stop();
qint64 readData(char *data, qint64 maxlen) override;
qint64 writeData(const char *data, qint64 len) override;
qint64 bytesAvailable() const override;
private:
void generateData(const QAudioFormat &format, qint64 durationUs, int sampleRate);
private:
qint64 m_pos = 0;
QByteArray m_buffer;
};
class AudioTest : public QMainWindow
{
Q_OBJECT
public:
AudioTest();
~AudioTest();
private:
void initializeWindow();
void initializeAudio(const QAudioDeviceInfo &deviceInfo);
private:
QTimer *m_pushTimer = nullptr;
// Owned by layout
QPushButton *m_modeButton = nullptr;
QPushButton *m_suspendResumeButton = nullptr;
QComboBox *m_deviceBox = nullptr;
QLabel *m_volumeLabel = nullptr;
QSlider *m_volumeSlider = nullptr;
QScopedPointer<Generator> m_generator;
QScopedPointer<QAudioOutput> m_audioOutput;
bool m_pullMode = true;
private slots:
void toggleMode();
void toggleSuspendResume();
void deviceChanged(int index);
void volumeChanged(int);
};
#endif // AUDIOOUTPUT_H
|
