summaryrefslogtreecommitdiffstats
path: root/demos/mobile/guitartuner/src/voicegenerator.h
blob: e4abd90a737aa5a3444aab2dfc6cef11c88b556c (plain)
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
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module 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 Nokia Corporation 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 VOICEGENERATOR_H
#define VOICEGENERATOR_H

#include <QIODevice>
#include <QByteArray>
#include <QAudioFormat>
#include <QtCore/qmath.h>
#include <QtCore/qendian.h>
#include <QDebug>

#include "constants.h"


class VoiceGenerator : public QIODevice
{
    Q_OBJECT
public:
    VoiceGenerator(const QAudioFormat &format, qreal frequency, qreal amplitude, QObject *parent = 0);
    ~VoiceGenerator();
    void setFrequency(qreal frequency);
    qint64 readData(char *data, qint64 maxlen);
    qint64 writeData(const char *data, qint64 maxlen);
    qint64 bytesAvailable() const;
    qreal frequency();
signals:

public slots:
    void setAmplitude(qreal amplitude);
    void start();
    void stop();

private:
    void setValue(uchar *ptr, qreal realValue);
    void refreshData();
    const QAudioFormat m_format;
    // buffer to store the data
    QByteArray m_buffer;
    // current position in buffer
    qint64 m_position;
    // max position depends on the sample rate of format and the frequency of voice
    qint64 m_max_position;
    qreal m_amplitude;
    qreal m_frequency;
};

#endif // VOICEGENERATOR_H