1 files changed, 62 insertions, 0 deletions
diff --git a/headtrack_stereo_demo/src/ticktimer.h b/headtrack_stereo_demo/src/ticktimer.h
new file mode 100644
index 0000000..e577255
--- /dev/null
+++ b/headtrack_stereo_demo/src/ticktimer.h
@@ -0,0 +1,62 @@
+#ifndef _TICKTIMER_H
+#define _TICKTIMER_H
+
+#include <ctime>
+#include <iostream>
+
+class TickTimer
+{
+public:
+  TickTimer(double f_dUpdateDelta)
+  {
+    m_dUpdateDelta = f_dUpdateDelta;
+    m_iNrOfTicks = 0;
+    m_dTicksPS = m_dRawTicksPS = m_dAvgTicksPS = m_dRawAvgTicksPS = 0.0;
+  }
+
+  void tick()
+  {
+    //DWORD  l_CurClock = timeGetTime();
+    time_t  l_CurClock = clock();
+    if (m_iNrOfTicks == 0)
+    {
+      m_FirstClock = m_LastClock = l_CurClock;
+    }
+        
+    //update the ticks per second, based on the last tick period
+    m_dRawTicksPS = (double)CLOCKS_PER_SEC / (double)(l_CurClock - m_LastClock);
+    //m_dRawTicksPS = 1000.0 / (double)(l_CurClock - m_LastClock);
+    double delta = (m_dRawTicksPS - m_dTicksPS);
+    if ( (delta >= m_dUpdateDelta) || (delta <= -m_dUpdateDelta) )
+      m_dTicksPS = m_dRawTicksPS;
+
+    m_LastClock = l_CurClock;
+
+    //update the ticks per second, based on the average tick period
+    m_iNrOfTicks++;
+    m_dRawAvgTicksPS = (double)m_iNrOfTicks/((double)(m_LastClock - m_FirstClock)/(double)CLOCKS_PER_SEC);
+    //m_dRawAvgTicksPS = (double)m_iNrOfTicks/((double)(m_LastClock - m_FirstClock)/1000.0);
+    delta = (m_dRawAvgTicksPS - m_dAvgTicksPS);
+    if ( (delta >= m_dUpdateDelta) || (delta <= -m_dUpdateDelta) )
+      m_dAvgTicksPS = m_dRawAvgTicksPS;
+  }
+
+  inline double getTicksPerSecond() { return m_dTicksPS; }
+  inline double getRawTicksPerSecond() { return m_dRawTicksPS; }
+  inline double getAvgTicksPerSecond() { return m_dAvgTicksPS; }
+  inline double getRawAvgTicksPerSecond() { return m_dRawAvgTicksPS; }
+
+private:
+  int     m_iNrOfTicks;
+  double  m_dUpdateDelta,
+          m_dTicksPS,
+          m_dRawTicksPS,
+          m_dAvgTicksPS,
+          m_dRawAvgTicksPS;
+  clock_t m_FirstClock,
+          m_LastClock;
+  /*DWORD   m_FirstClock,
+          m_LastClock;*/
+};
+
+#endif //_TICKTIMER_H
+\ No newline at end of file