blob: bb22907a26e40b190f78bd4f2241b152d8cce3f2 (
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
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
125
126
127
128
129
130
131
132
133
|
/****************************************************************************
**
** 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 QtMediaservices module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WAVEDECODER_H
#define WAVEDECODER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qiodevice.h>
#include <QtMultimedia/qaudioformat.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class WaveDecoder : public QIODevice
{
Q_OBJECT
public:
explicit WaveDecoder(QIODevice *source, QObject *parent = 0);
~WaveDecoder();
QAudioFormat audioFormat() const;
int duration() const;
qint64 size() const;
bool isSequential() const;
qint64 bytesAvailable() const;
Q_SIGNALS:
void formatKnown();
void invalidFormat();
private Q_SLOTS:
void handleData();
private:
qint64 readData(char *data, qint64 maxlen);
qint64 writeData(const char *data, qint64 len);
struct chunk
{
char id[4];
quint32 size;
};
struct RIFFHeader
{
chunk descriptor;
char type[4];
};
struct WAVEHeader
{
chunk descriptor;
quint16 audioFormat;
quint16 numChannels;
quint32 sampleRate;
quint32 byteRate;
quint16 blockAlign;
quint16 bitsPerSample;
};
struct DATAHeader
{
chunk descriptor;
};
struct CombinedHeader
{
RIFFHeader riff;
WAVEHeader wave;
};
bool haveFormat;
qint64 dataSize;
qint64 remaining;
QAudioFormat format;
QIODevice *source;
CombinedHeader header;
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // WAVEDECODER_H
|
