Normalizer.cpp
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35 // ****************************************************************************
36 // Filename: Normalizer.cpp
37 // Author: Pedram Azad
38 // Date: 2005
39 // ****************************************************************************
40 
41 
42 // ****************************************************************************
43 // Includes
44 // ****************************************************************************
45 
46 #include <new> // for explicitly using correct new/delete operators on VC DSPs
47 
48 #include "Normalizer.h"
49 
50 #include <float.h>
51 
52 
53 
54 // ****************************************************************************
55 // Functions
56 // ****************************************************************************
57 
58 void Normalizer::NormalizeLength(float *pInput, int nInputLength, float *pOutput, int nOutputLength)
59 {
60  const float factor = float(nInputLength) / nOutputLength;
61 
62  int i;
63  const int last_i = int((nInputLength - 1) / factor);
64 
65  for (i = 0; i <= last_i; i++)
66  {
67  const int offset = int(i * factor);
68  const float w = i * factor - offset;
69 
70  pOutput[i] = (1 - w) * pInput[offset] + w * pInput[offset + 1];
71  }
72 
73  for (i = last_i + 1; i < nOutputLength; i++)
74  pOutput[i] = pInput[nInputLength - 1];
75 }
76 
77 
78 void Normalizer::NormalizeAmplitude(float *pData, int nLength)
79 {
80  float min = FLT_MAX, max = -FLT_MAX;
81  int i;
82 
83  if (nLength < 2)
84  return;
85 
86  for (i = 0; i < nLength; i++)
87  {
88  if (pData[i] > max)
89  max = pData[i];
90 
91  if (pData[i] < min)
92  min = pData[i];
93  }
94 
95  const float factor = 100.0f / (max - min);
96 
97  for (i = 0; i < nLength; i++)
98  pData[i] = (pData[i] - min) * factor;
99 }
100 
101 void Normalizer::NormalizeStartingPoint(float *pData, int nLength)
102 {
103  if (nLength < 2)
104  return;
105 
106  const float first = pData[0];
107 
108  for (int i = 0; i < nLength; i++)
109  pData[i] -= first;
110 }
GLint * first
Definition: glext.h:3312
void NormalizeStartingPoint(float *pData, int nLength)
Definition: Normalizer.cpp:101
GLintptr offset
Definition: glext.h:3389
void NormalizeAmplitude(float *pData, int nLength)
Definition: Normalizer.cpp:78
void NormalizeLength(float *pInput, int nInputLength, float *pOutput, int nOutputLength)
Definition: Normalizer.cpp:58
GLubyte GLubyte GLubyte GLubyte w
Definition: glext.h:3571


asr_ivt
Author(s): Allgeyer Tobias, Hutmacher Robin, Kleinert Daniel, Meißner Pascal, Scholz Jonas, Stöckle Patrick
autogenerated on Mon Dec 2 2019 03:47:28