Bela
Real-time, ultra-low-latency audio and sensor processing system for BeagleBone Black
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stats.hpp
1 #ifndef STATS_HPP_INCLUDED
2 #define STATS_HPP_INCLUDED
3 #include <stdlib.h>
4 #include <stdio.h>
5 #include <string.h>
6 
7 template<class TYPE>
9 private:
10  TYPE* array;
11  int length;
12  bool bufferFull;
13  int pointer;
14  TYPE sum;
15  double scale;
16  double average;
17  void dealloc(){
18  free(array);
19  // delete array;
20  }
21 
22  void init(int aLength){
23  length=aLength;
24  scale=1.0/length;
25  // array= new TYPE(length); // for some reason this causes memory corruption, so I am using malloc() instead...
26  array=(TYPE*)malloc(sizeof(TYPE)*length);
27  sum=0;
28  if(array==NULL)
29  printf("Error while allocating array\n");
30  memset(array, 0, sizeof(TYPE)*length);
31  reset();
32  }
33 public:
34  MovingAverage(){
35  init(0);
36  }
37  MovingAverage(int aLength){
38  init(aLength);
39  }
40  ~MovingAverage(){
41  dealloc();
42  }
43  int getLength(){
44  return bufferFull ? length : pointer;
45  }
46  void setLength(int aLength){
47  dealloc();
48  init(aLength);
49  }
50  double add(TYPE newElement){
51  sum-=array[pointer];
52  array[pointer]=newElement;
53  sum+=newElement;
54  if(bufferFull==true){
55  average=sum*scale;
56  }
57  else{
58  average=sum/(double)(1+pointer);
59  }
60  pointer++;
61  if(pointer==length){
62  pointer=0;
63  bufferFull=true;
64  }
65  return average;
66  }
67  double getAverage(){
68  return average;
69  }
70  void reset(){
71  pointer=0;
72  bufferFull=false;
73  }
74 };
75 
76 #endif /* STATS_HPP_INCLUDED */
Definition: stats.hpp:8