source/activity.cpp

   1 #include <cmath>
   2 #include <msp/time/units.h>
   3 #include "activity.h"
   4
   5 using namespace Msp;
   6
   7 Activity::Activity():
   8         average(0)
   9 { }
  10
  11 void Activity::add_bytes(unsigned n)
  12 {
  13         // Scale for correct integral
  14         average += n*0.06935;
  15 }
  16
  17 void Activity::tick(const Time::TimeDelta &dt)
  18 {
  19         static Time::TimeDelta last_dt;
  20         static float decay = 0;
  21
  22         if(dt!=last_dt)
  23         {
  24                 // Half-life in 10 seconds
  25                 decay = pow(0.933f, dt/Time::sec);
  26                 last_dt = dt;
  27         }
  28
  29         average *= decay;
  30 }