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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QAUDIOFORMAT_H
#define QAUDIOFORMAT_H
#include <QtCore/qobject.h>
#include <QtCore/qshareddata.h>
#include <QtMultimedia/qtmultimediaglobal.h>
QT_BEGIN_NAMESPACE
class QAudioFormatPrivate;
namespace QtPrivate {
template <typename... Args>
constexpr int channelConfig(Args... values) {
return (0 | ... | (1u << values));
}
}
class QAudioFormat
{
public:
enum SampleFormat : quint16 {
Unknown,
UInt8,
Int16,
Int32,
Float,
NSampleFormats
};
// This matches the speaker positions of a 22.2 audio layout. Stereo, Surround 5.1 and Surround 7.1 are subsets of these
enum AudioChannelPosition {
UnknownPosition,
FrontLeft,
FrontRight,
FrontCenter,
LFE,
BackLeft,
BackRight,
FrontLeftOfCenter,
FrontRightOfCenter,
BackCenter,
SideLeft,
SideRight,
TopCenter,
TopFrontLeft,
TopFrontCenter,
TopFrontRight,
TopBackLeft,
TopBackCenter,
TopBackRight,
LFE2,
TopSideLeft,
TopSideRight,
BottomFrontCenter,
BottomFrontLeft,
BottomFrontRight
};
static constexpr int NChannelPositions = BottomFrontRight + 1;
enum ChannelConfig : quint32 {
ChannelConfigUnknown = 0,
ChannelConfigMono = QtPrivate::channelConfig(FrontCenter),
ChannelConfigStereo = QtPrivate::channelConfig(FrontLeft, FrontRight),
ChannelConfig2Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, LFE),
ChannelConfigSurround5Dot0 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, BackLeft, BackRight),
ChannelConfigSurround5Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, LFE, BackLeft, BackRight),
ChannelConfigSurround7Dot0 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, BackLeft, BackRight, SideLeft, SideRight),
ChannelConfigSurround7Dot1 = QtPrivate::channelConfig(FrontLeft, FrontRight, FrontCenter, LFE, BackLeft, BackRight, SideLeft, SideRight),
};
template <typename... Args>
static constexpr ChannelConfig channelConfig(Args... channels)
{
return ChannelConfig(QtPrivate::channelConfig(channels...));
}
constexpr bool isValid() const noexcept
{
return m_sampleRate > 0 && m_channelCount > 0 && m_sampleFormat != Unknown;
}
constexpr void setSampleRate(int sampleRate) noexcept { m_sampleRate = sampleRate; }
constexpr int sampleRate() const noexcept { return m_sampleRate; }
Q_MULTIMEDIA_EXPORT void setChannelConfig(ChannelConfig config) noexcept;
constexpr ChannelConfig channelConfig() const noexcept { return m_channelConfig; }
constexpr void setChannelCount(int channelCount) noexcept { m_channelConfig = ChannelConfigUnknown; m_channelCount = channelCount; }
constexpr int channelCount() const noexcept { return m_channelCount; }
Q_MULTIMEDIA_EXPORT int channelOffset(AudioChannelPosition channel) const noexcept;
constexpr void setSampleFormat(SampleFormat f) noexcept { m_sampleFormat = f; }
constexpr SampleFormat sampleFormat() const noexcept { return m_sampleFormat; }
// Helper functions
Q_MULTIMEDIA_EXPORT qint32 bytesForDuration(qint64 microseconds) const;
Q_MULTIMEDIA_EXPORT qint64 durationForBytes(qint32 byteCount) const;
Q_MULTIMEDIA_EXPORT qint32 bytesForFrames(qint32 frameCount) const;
Q_MULTIMEDIA_EXPORT qint32 framesForBytes(qint32 byteCount) const;
Q_MULTIMEDIA_EXPORT qint32 framesForDuration(qint64 microseconds) const;
Q_MULTIMEDIA_EXPORT qint64 durationForFrames(qint32 frameCount) const;
constexpr int bytesPerFrame() const { return bytesPerSample()*channelCount(); }
constexpr int bytesPerSample() const noexcept
{
switch (m_sampleFormat) {
case Unknown:
case NSampleFormats: return 0;
case UInt8: return 1;
case Int16: return 2;
case Int32:
case Float: return 4;
}
return 0;
}
Q_MULTIMEDIA_EXPORT float normalizedSampleValue(const void *sample) const;
friend bool operator==(const QAudioFormat &a, const QAudioFormat &b)
{
return a.m_sampleRate == b.m_sampleRate &&
a.m_channelCount == b.m_channelCount &&
a.m_sampleFormat == b.m_sampleFormat;
}
friend bool operator!=(const QAudioFormat &a, const QAudioFormat &b)
{
return !(a == b);
}
static Q_MULTIMEDIA_EXPORT ChannelConfig defaultChannelConfigForChannelCount(int channelCount);
private:
SampleFormat m_sampleFormat = SampleFormat::Unknown;
short m_channelCount = 0;
ChannelConfig m_channelConfig = ChannelConfigUnknown;
int m_sampleRate = 0;
quint64 reserved = 0;
};
#ifndef QT_NO_DEBUG_STREAM
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug, const QAudioFormat &);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug, QAudioFormat::SampleFormat);
#endif
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QAudioFormat)
#endif // QAUDIOFORMAT_H
|
