From 1f082a85cbf1c1bd3c9875533a44ecca26984e01 Mon Sep 17 00:00:00 2001
From: Sergeanur <s.anureev@yandex.ua>
Date: Fri, 25 Jun 2021 02:33:40 +0300
Subject: [PATCH] Refactor CTimer::Update

---
 src/core/Timer.cpp | 135 +++++++++++++++++++++++++++------------------
 1 file changed, 81 insertions(+), 54 deletions(-)

diff --git a/src/core/Timer.cpp b/src/core/Timer.cpp
index 29875c91..cf060127 100644
--- a/src/core/Timer.cpp
+++ b/src/core/Timer.cpp
@@ -83,14 +83,14 @@ void CTimer::Shutdown(void)
 {
 	;
 }
-
+#ifdef FIX_BUGS
 void CTimer::Update(void)
 {
-#ifdef FIX_BUGS
 	static double frameTimeLogical = 0.0;
 	static double frameTimeFraction = 0.0;
 	static double frameTimeFractionScaled = 0.0;
-#endif
+	double frameTime;
+	double dblUpdInMs;
 
 	m_snPreviousTimeInMilliseconds = m_snTimeInMilliseconds;
 	
@@ -105,49 +105,100 @@ void CTimer::Update(void)
 		_oldPerfCounter = pc;
 
 		// bugfix from VC
-#ifdef FIX_BUGS
 		float updInCyclesScaled = GetIsPaused() ? updInCycles : updInCycles * ms_fTimeScale;
-#else
-		float updInCyclesScaled = updInCycles * ms_fTimeScale;
+
+		frameTime = updInCyclesScaled / (double)_nCyclesPerMS;
+
+		dblUpdInMs = (double)updInCycles / (double)_nCyclesPerMS;
+	}
+	else
 #endif
+	{
+		RsTimerType timer = RsTimer();
+		
+		RsTimerType updInMs = timer - oldPcTimer;
+		
+		frameTime = (double)updInMs * ms_fTimeScale;
 
-		double frameTime = updInCyclesScaled / (double)_nCyclesPerMS;
+		oldPcTimer = timer;
 
-#ifdef FIX_BUGS
-		// count frames as if we're running at 30 fps
-		m_LogicalFramesPassed = 0;
-		frameTimeLogical += ((double)updInCycles / (double)_nCyclesPerMS);
-		while (frameTimeLogical >= 1000.0 / 30.0) {
-			frameTimeLogical -= 1000.0 / 30.0;
-			m_LogicalFramesPassed++;
-		}
-		m_LogicalFrameCounter += m_LogicalFramesPassed;
+		dblUpdInMs = (double)updInMs;
+	}
 
-		frameTimeFraction += (double)updInCycles / (double)_nCyclesPerMS;
-		frameTimeFractionScaled += frameTime;
+	// count frames as if we're running at 30 fps
+	m_LogicalFramesPassed = 0;
+	frameTimeLogical += dblUpdInMs;
+	while(frameTimeLogical >= 1000.0 / 30.0) {
+		frameTimeLogical -= 1000.0 / 30.0;
+		m_LogicalFramesPassed++;
+	}
+	m_LogicalFrameCounter += m_LogicalFramesPassed;
+
+	frameTimeFraction += dblUpdInMs;
+	frameTimeFractionScaled += frameTime;
 
-		m_snTimeInMillisecondsPauseMode += uint32(frameTimeFraction);
+	m_snTimeInMillisecondsPauseMode += uint32(frameTimeFraction);
+															 
+	if ( GetIsPaused() )
+		ms_fTimeStep = 0.0f;
+	else
+	{
+		m_snTimeInMilliseconds += uint32(frameTimeFractionScaled);
+		m_snTimeInMillisecondsNonClipped += uint32(frameTimeFractionScaled);
+		ms_fTimeStep = frameTime / 1000.0f * 50.0f;
+	}
+	frameTimeFraction -= uint32(frameTimeFraction);
+	frameTimeFractionScaled -= uint32(frameTimeFractionScaled);
+	
+	if ( ms_fTimeStep < 0.01f && !GetIsPaused() )
+		ms_fTimeStep = 0.01f;
+
+	ms_fTimeStepNonClipped = ms_fTimeStep;
+	
+	if ( !CRecordDataForGame::IsPlayingBack() )
+	{
+		ms_fTimeStep = Min(3.0f, ms_fTimeStep);
+
+		if ( (m_snTimeInMilliseconds - m_snPreviousTimeInMilliseconds) > 60 )
+			m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 60;
+	}
+  
+	if ( CRecordDataForChase::IsRecording() )
+	{
+		ms_fTimeStep = 1.0f;
+		m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 16;
+	}
+  
+	m_FrameCounter++;
+}
 #else
+void CTimer::Update(void)
+{
+	m_snPreviousTimeInMilliseconds = m_snTimeInMilliseconds;
+	
+#ifdef _WIN32
+	if ( (double)_nCyclesPerMS != 0.0 )
+	{
+		LARGE_INTEGER pc;
+		QueryPerformanceCounter(&pc);
+		
+		int32 updInCycles = (pc.LowPart - _oldPerfCounter.LowPart); // & 0x7FFFFFFF; pointless
+		
+		_oldPerfCounter = pc;
+
+		float updInCyclesScaled = updInCycles * ms_fTimeScale;
+
+		double frameTime = updInCyclesScaled / (double)_nCyclesPerMS;
 		m_snTimeInMillisecondsPauseMode = m_snTimeInMillisecondsPauseMode + frameTime;
-#endif
 		
 		if ( GetIsPaused() )
 			ms_fTimeStep = 0.0f;
 		else
 		{
-#ifdef FIX_BUGS
-			m_snTimeInMilliseconds += uint32(frameTimeFractionScaled);
-			m_snTimeInMillisecondsNonClipped += uint32(frameTimeFractionScaled);
-#else
 			m_snTimeInMilliseconds = m_snTimeInMilliseconds + frameTime;
 			m_snTimeInMillisecondsNonClipped = m_snTimeInMillisecondsNonClipped + frameTime;
-#endif
 			ms_fTimeStep = frameTime / 1000.0f * 50.0f;
 		}
-#ifdef FIX_BUGS
-		frameTimeFraction -= uint32(frameTimeFraction);
-		frameTimeFractionScaled -= uint32(frameTimeFractionScaled);
-#endif
 	}
 	else
 #endif
@@ -160,41 +211,16 @@ void CTimer::Update(void)
 
 		oldPcTimer = timer;
 		
-#ifdef FIX_BUGS
-		// count frames as if we're running at 30 fps
-		m_LogicalFramesPassed = 0;
-		frameTimeLogical += (double)updInMs;
-		while(frameTimeLogical >= 1000.0 / 30.0) {
-			frameTimeLogical -= 1000.0 / 30.0;
-			m_LogicalFramesPassed++;
-		}
-		m_LogicalFrameCounter += m_LogicalFramesPassed;
-
-		frameTimeFraction += (double)updInMs;
-		frameTimeFractionScaled += frameTime;
-
-		m_snTimeInMillisecondsPauseMode += uint32(frameTimeFraction);
-#else
 		m_snTimeInMillisecondsPauseMode = m_snTimeInMillisecondsPauseMode + frameTime;
-#endif
 															 
 		if ( GetIsPaused() )
 			ms_fTimeStep = 0.0f;
 		else
 		{
-#ifdef FIX_BUGS
-			m_snTimeInMilliseconds += uint32(frameTimeFractionScaled);
-			m_snTimeInMillisecondsNonClipped += uint32(frameTimeFractionScaled);
-#else
 			m_snTimeInMilliseconds = m_snTimeInMilliseconds + frameTime;
 			m_snTimeInMillisecondsNonClipped = m_snTimeInMillisecondsNonClipped + frameTime;
-#endif
 			ms_fTimeStep = frameTime / 1000.0f * 50.0f;
 		}
-#ifdef FIX_BUGS
-		frameTimeFraction -= uint32(frameTimeFraction);
-		frameTimeFractionScaled -= uint32(frameTimeFractionScaled);
-#endif
 	}
 	
 	if ( ms_fTimeStep < 0.01f && !GetIsPaused() )
@@ -218,6 +244,7 @@ void CTimer::Update(void)
   
 	m_FrameCounter++;
 }
+#endif
 
 void CTimer::Suspend(void)
 {