* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
* Distributed under the terms of the MIT License.
*/
#ifndef TIME_COMPUTER_H
#define TIME_COMPUTER_H
#include <SupportDefs.h>
struct TimeComputer {
TimeComputer();
void Init(float frameRate, bigtime_t realBaseTime);
void SetFrameRate(float frameRate);
void AddTimeStamp(bigtime_t realTime, uint64 frames);
bigtime_t RealTime() const { return fRealTime; }
bigtime_t PerformanceTime() const
{ return fPerformanceTime; }
double Drift() const { return fDrift; }
private:
static const int32 kEntryCount = 32;
struct Entry {
bigtime_t realTime;
bigtime_t performanceTime;
};
private:
void _AddEntry(bigtime_t realTime,
bigtime_t performanceTime);
private:
bigtime_t fRealTime;
bigtime_t fPerformanceTime;
double fDrift;
float fFrameRate;
double fUsecsPerFrame;
bigtime_t fPerformanceTimeBase;
uint64 fFrameBase;
bool fResetTimeBase;
Entry fEntries[kEntryCount];
int32 fFirstEntry;
int32 fLastEntry;
};
#endif
