blob: de679ce9dbeeda07e1cbddc86596cfb0ec59afaf (
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
|
/****************************************************************************
**
** Copyright (C) 2013 - 2016 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QT3DS_ELAPSED_TIMER_H
#define QT3DS_ELAPSED_TIMER_H
#include <QElapsedTimer>
namespace Q3DSViewer {
///< @brief this class implementes a elapsed timer using QElapsedTimer
class Qt3DSElapsedTimer
{
public:
QElapsedTimer m_elapsedTimer;
QElapsedTimer::ClockType m_clockType;
Qt3DSElapsedTimer()
{
m_clockType = QElapsedTimer::clockType();
reset();
}
void reset() { m_elapsedTimer.start(); }
qint64 getNanoSeconds()
{
qint64 time = m_elapsedTimer.nsecsElapsed();
reset();
return time;
}
};
///< @brief this class implementes a timer using QElapsedTimer
class Qt3DSTimer
{
public:
QElapsedTimer m_timer;
Qt3DSTimer() { start(); }
void start() { m_timer.start(); }
qint64 getNanoSeconds() { return static_cast<qint64>(m_timer.elapsed() * 1000 * 1000); }
};
///< @brief this class implementes a circular buffer
template <typename TDataType, unsigned long TBufferSize = 20>
struct NumericCircularBuffer
{
unsigned long m_TotalNumElements; ///< holds the current number of elements
unsigned long m_NumElements; ///< restricts the size to TBufferSize and wrappes around
unsigned long m_NextIndex; ///< next index
TDataType m_RunningTotal; ///< summed value of all entries
TDataType m_Elements[TBufferSize]; ///< element buffer
NumericCircularBuffer() { clear(); }
void clear()
{
m_TotalNumElements = 0;
m_NumElements = 0;
m_NextIndex = 0;
m_RunningTotal = 0;
memset(m_Elements, 0, sizeof(TDataType) * TBufferSize);
}
void push_back(const TDataType &data)
{
if (m_NumElements < TBufferSize)
++m_NumElements;
else
m_RunningTotal -= m_Elements[m_NextIndex];
m_RunningTotal += data;
++m_TotalNumElements;
m_Elements[m_NextIndex] = data;
m_NextIndex = (m_NextIndex + 1) % TBufferSize;
}
unsigned long size() const { return m_NumElements; }
TDataType average() const
{
TDataType mySize = ((TDataType)size());
if (mySize)
return m_RunningTotal / mySize;
return 0;
}
unsigned long getTotalItems() const { return m_TotalNumElements; }
static unsigned long getBufferSize() { return TBufferSize; }
};
} // end namspace
#endif // QT3DS_ELAPSED_TIMER_H
|
