//
// Programmer:    Craig Stuart Sapp <craig@ccrma.stanford.edu>
// Creation Date: Mon Oct 13 11:34:57 GMT-0800 1997
// Last Modified: Tue Feb 10 21:05:19 GMT-0800 1998
// Last Modified: Sat Sep 19 15:56:48 PDT 1998
// Filename:      .../sig/code/control/SigTimer/SigTimer.h
// Syntax:        C++ 
// $Smake:        cc -g -c %b.cc && rm -f %b.o
//

#ifndef _SIGTIMER_H_INCLUDED
#define _SIGTIMER_H_INCLUDED


#ifdef VISUAL
   #include <wtypes.h>
   typedef LONGLONG int64bits;
#else
   typedef long long int int64bits;
#endif


class SigTimer {
   public:
                       SigTimer           (void);
                       SigTimer           (int aSpeed);
                       SigTimer           (SigTimer& aTimer);
                      ~SigTimer           ();

      static int64bits clockCycles        (void);
      int              expired            (void) const;
      static int       getCpuSpeed        (void);
      double           getPeriod          (void) const;
      double           getPeriodCount     (void) const;
      int              getTicksPerSecond  (void) const;
      int              getTime            (void) const;
      double           getTimeInSeconds   (void) const;
      int              getTimeInTicks     (void) const;
      int              measureCpuSpeed    (int quantize = 0) const;
      void             reset              (void);
      static void      setCpuSpeed        (int aSpeed);
      void             setPeriod          (double aPeriod);
      void             setTempo           (double beatsPerMinute);
      void             setTicksPerSecond  (int aTickRate);
      void             start              (void);
      void             sync               (SigTimer& aTimer);
      void             update             (void);
      void             update             (int periodCount);

   protected:
      static int64bits globalOffset;
      static int       cpuSpeed;         

      int64bits        offset;          
      int              ticksPerSecond;    
      double           period;

   // protected functions
      double           getFactor          (void) const;

};

   
#endif  _SIGTIMER_H_INCLUDED