SDRAngel  4.11.5
Developer docs for <a href="https://github.com/f4exb/sdrangel">SDRangel<\a>, an Open Source Qt5 / OpenGL 3.0+ SDR and signal analyzer frontend to various hardware.
max2d.h
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1 // Copyright (C) 2018 F4EXB //
3 // written by Edouard Griffiths //
4 // //
5 // This program is free software; you can redistribute it and/or modify //
6 // it under the terms of the GNU General Public License as published by //
7 // the Free Software Foundation as version 3 of the License, or //
8 // (at your option) any later version. //
9 // //
10 // This program is distributed in the hope that it will be useful, //
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of //
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
13 // GNU General Public License V3 for more details. //
14 // //
15 // You should have received a copy of the GNU General Public License //
16 // along with this program. If not, see <http://www.gnu.org/licenses/>. //
18 
19 #ifndef SDRBASE_UTIL_MAX2D_H_
20 #define SDRBASE_UTIL_MAX2D_H_
21 
22 #include <algorithm>
23 
24 template<typename T>
25 class Max2D
26 {
27 public:
28  Max2D() : m_max(0), m_maxSize(0), m_width(0), m_size(0), m_maxIndex(0) {}
29 
31  {
32  if (m_max) {
33  delete[] m_max;
34  }
35  }
36 
37  void resize(unsigned int width, unsigned int size)
38  {
39  if (width > m_maxSize)
40  {
41  m_maxSize = width;
42  if (m_max) {
43  delete[] m_max;
44  }
45  m_max = new T[m_maxSize];
46  }
47 
48  m_width = width;
49  m_size = size;
50 
51  std::fill(m_max, m_max+m_width, 0);
52  m_maxIndex = 0;
53  }
54 
55  bool storeAndGetMax(T& max, T v, unsigned int index)
56  {
57  if (m_size <= 1)
58  {
59  max = v;
60  return true;
61  }
62 
63  if (m_maxIndex == 0)
64  {
65  m_max[index] = v;
66  return false;
67  }
68  else if (m_maxIndex == m_size - 1)
69  {
70  m_max[index] = std::max(m_max[index], v);
71  max = m_max[index];
72  return true;
73  }
74  else
75  {
76  m_max[index] = std::max(m_max[index], v);
77  return false;
78  }
79  }
80 
81  bool nextMax()
82  {
83  if (m_size <= 1) {
84  return true;
85  }
86 
87  if (m_maxIndex == m_size - 1)
88  {
89  m_maxIndex = 0;
90  std::fill(m_max, m_max+m_width, 0);
91  return true;
92  }
93  else
94  {
95  m_maxIndex++;
96  return false;
97  }
98  }
99 
100 private:
101  T *m_max;
102  unsigned int m_maxSize;
103  unsigned int m_width;
104  unsigned int m_size;
105  unsigned int m_maxIndex;
106 };
107 
108 #endif /* SDRBASE_UTIL_MAX2D_H_ */
unsigned int m_maxIndex
Definition: max2d.h:105
unsigned int m_size
Definition: max2d.h:104
Definition: max2d.h:25
bool storeAndGetMax(T &max, T v, unsigned int index)
Definition: max2d.h:55
void resize(unsigned int width, unsigned int size)
Definition: max2d.h:37
~Max2D()
Definition: max2d.h:30
Max2D()
Definition: max2d.h:28
T * m_max
Definition: max2d.h:101
bool nextMax()
Definition: max2d.h:81
unsigned int m_width
Definition: max2d.h:103
unsigned int m_maxSize
Definition: max2d.h:102
T max(const T &x, const T &y)
Definition: framework.h:446