comparison src/BTrack.cpp @ 47:9f45f9dbc6b5

Added a license file, fixed some small issues

 //=======================================================================
 /** @file BTrack.cpp
- *  @brief Implementation file for the BTrack beat tracker
+ *  @brief BTrack - a real-time beat tracker
  *  @author Adam Stark
  *  @copyright Copyright (C) 2008-2014  Queen Mary University of London
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

 //-------------------------------------------------------------------------------
 // calculates the mean of values in an array from index locations [start,end]
 float BTrack :: mean_array(float array[],int start,int end)
 {
 	int i;
-	float sum = 0;
-	int length = end - start + 1;
+	double sum = 0;
+
+    int length = end - start;
 	
 	// find sum
-	for (i = start;i < end+1;i++)
+	for (i = start;i < end;i++)
 	{
 		sum = sum + array[i];
 	}
 	
-	return sum / length;	// average and return
+    if (length > 0)
+    {
+        return sum / length;	// average and return
+    }
+    else
+    {
+        return 0;
+    }
 }
 
 //-------------------------------------------------------------------------------
 // normalise the array
 void BTrack :: normalise(float array[],int N)