1 files changed, 235 insertions, 0 deletions

diff --git a/src/core/Timer.cpp b/src/core/Timer.cpp
new file mode 100644
index 00000000..543f582b
--- /dev/null
+++ b/src/core/Timer.cpp
@@ -0,0 +1,235 @@
+#include <windows.h>
+#include "common.h"
+#include "patcher.h"
+#include "DMAudio.h"
+#include "Record.h"
+#include "Timer.h"
+
+uint32 &CTimer::m_snTimeInMilliseconds = *(uint32*)0x885B48;
+uint32 &CTimer::m_snTimeInMillisecondsPauseMode = *(uint32*)0x5F7614;
+uint32 &CTimer::m_snTimeInMillisecondsNonClipped = *(uint32*)0x9412E8;
+uint32 &CTimer::m_snPreviousTimeInMilliseconds = *(uint32*)0x8F29E4;
+uint32 &CTimer::m_FrameCounter = *(uint32*)0x9412EC;
+float &CTimer::ms_fTimeScale = *(float*)0x8F2C20;
+float &CTimer::ms_fTimeStep = *(float*)0x8E2CB4;
+float &CTimer::ms_fTimeStepNonClipped = *(float*)0x8E2C4C;
+bool  &CTimer::m_UserPause = *(bool*)0x95CD7C;
+bool  &CTimer::m_CodePause = *(bool*)0x95CDB1;
+
+//UInt32 oldPcTimer;
+uint32 &oldPcTimer = *(uint32*)0x9434F4;
+
+//UInt32 suspendPcTimer;
+uint32 &suspendPcTimer = *(uint32*)0x62A308;
+
+//UInt32 _nCyclesPerMS = 1;
+uint32 &_nCyclesPerMS = *(uint32*)0x5F7610;
+
+//LARGE_INTEGER _oldPerfCounter;
+LARGE_INTEGER &_oldPerfCounter = *(LARGE_INTEGER*)0x62A310;
+
+//LARGE_INTEGER perfSuspendCounter;
+LARGE_INTEGER &perfSuspendCounter = *(LARGE_INTEGER*)0x62A318;
+
+//UInt32 suspendDepth;
+uint32 &suspendDepth = *(uint32*)0x62A320;
+
+void CTimer::Initialise(void)
+{
+	debug("Initialising CTimer...\n");
+	
+	ms_fTimeScale = 1.0f;
+	ms_fTimeStep = 1.0f;
+	suspendDepth = 0;
+	m_UserPause = false;
+	m_CodePause = false;
+	m_snTimeInMillisecondsNonClipped = 0;
+	m_snPreviousTimeInMilliseconds = 0;
+	m_snTimeInMilliseconds = 1;
+	
+	LARGE_INTEGER perfFreq;
+	if ( QueryPerformanceFrequency(&perfFreq) )
+	{
+		OutputDebugString("Performance counter available\n");
+		_nCyclesPerMS = uint32(perfFreq.QuadPart / 1000);
+		QueryPerformanceCounter(&_oldPerfCounter);
+	}
+	else
+	{
+		OutputDebugString("Performance counter not available, using millesecond timer\n");
+		_nCyclesPerMS = 0;
+		oldPcTimer = RsTimer();
+	}
+	
+	m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds;
+	
+	m_FrameCounter = 0;
+	
+	DMAudio.ResetTimers(m_snPreviousTimeInMilliseconds);
+	
+	debug("CTimer ready\n");
+}
+
+void CTimer::Shutdown(void)
+{
+	;
+}
+
+#if 1
+WRAPPER void CTimer::Update(void) { EAXJMP(0x4ACF70); }
+#else
+void CTimer::Update(void)
+{
+	m_snPreviousTimeInMilliseconds = m_snTimeInMilliseconds;
+	
+	if ( (double)_nCyclesPerMS != 0.0 )
+	{
+		LARGE_INTEGER pc;
+		QueryPerformanceCounter(&pc);
+		
+		int32 updInCycles = (pc.LowPart - _oldPerfCounter.LowPart) & 0x7FFFFFFF;
+		
+		_oldPerfCounter = pc;
+		
+		double updInCyclesScaled = (double)updInCycles * ms_fTimeScale;
+		
+		double upd = updInCyclesScaled / (double)_nCyclesPerMS;
+
+		m_snTimeInMillisecondsPauseMode = (Int64)(m_snTimeInMillisecondsPauseMode + upd);
+		
+		if ( GetIsPaused() )
+			ms_fTimeStep = 0.0f;
+		else
+		{
+			m_snTimeInMilliseconds = (Int64)(m_snTimeInMilliseconds + upd);
+			m_snTimeInMillisecondsNonClipped = (Int64)(m_snTimeInMillisecondsNonClipped + upd);
+			ms_fTimeStep = updInCyclesScaled / (double)_nCyclesPerMS / 20.0;
+		}
+	}
+	else
+	{
+		uint32 timer = RsTimer();
+		
+		uint32 updInMs = timer - oldPcTimer;
+		
+		double upd = (double)updInMs * ms_fTimeScale;
+		
+		oldPcTimer = timer;
+		
+		m_snTimeInMillisecondsPauseMode = (Int64)(m_snTimeInMillisecondsPauseMode + upd);
+															 
+		if ( GetIsPaused() )
+			ms_fTimeStep = 0.0f;
+		else
+		{
+			m_snTimeInMilliseconds = (Int64)(m_snTimeInMilliseconds + upd);
+			m_snTimeInMillisecondsNonClipped = (Int64)(m_snTimeInMillisecondsNonClipped + upd);
+			ms_fTimeStep = upd / 1000.0f * 50.0f;
+		}
+	}
+	
+	if ( ms_fTimeStep < 0.01f && !GetIsPaused() )
+		ms_fTimeStep = 0.01f;
+
+	ms_fTimeStepNonClipped = ms_fTimeStep;
+	
+	if ( CRecordDataForGame::RecordingState != RECORDSTATE_2 )
+	{
+		ms_fTimeStep = min(3.0f, ms_fTimeStep);
+
+		if ( (m_snTimeInMilliseconds - m_snPreviousTimeInMilliseconds) > 60 )
+			m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 60;
+	}
+  
+	if ( CRecordDataForChase::Status == RECORDSTATE_1 )
+	{
+		ms_fTimeStep = 1.0f;
+		m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 16;
+	}
+  
+	m_FrameCounter++;
+}
+#endif
+
+void CTimer::Suspend(void)
+{
+	if ( ++suspendDepth > 1 )
+		return;
+	
+	if ( (double)_nCyclesPerMS != 0.0 )
+		QueryPerformanceCounter(&perfSuspendCounter);
+	else
+		suspendPcTimer = RsTimer();
+}
+
+void CTimer::Resume(void)
+{
+	if ( --suspendDepth != 0 )
+		return;
+
+	if ( (double)_nCyclesPerMS != 0.0 )
+	{
+		LARGE_INTEGER pc;
+		QueryPerformanceCounter(&pc);
+
+		_oldPerfCounter.LowPart += pc.LowPart - perfSuspendCounter.LowPart;
+	}
+	else
+		oldPcTimer += RsTimer() - suspendPcTimer;
+}
+
+uint32 CTimer::GetCyclesPerMillisecond(void)
+{
+	if (_nCyclesPerMS != 0)
+		return _nCyclesPerMS;
+	else 
+		return 1;
+}
+
+uint32 CTimer::GetCurrentTimeInCycles(void)
+{
+	if ( _nCyclesPerMS != 0 )
+	{
+		LARGE_INTEGER pc;
+		QueryPerformanceCounter(&pc);
+		return (pc.LowPart - _oldPerfCounter.LowPart) & 0x7FFFFFFF;
+	}
+	else
+		return RsTimer() - oldPcTimer;
+}
+
+bool CTimer::GetIsSlowMotionActive(void)
+{
+	return ms_fTimeScale < 1.0f;
+}
+
+void CTimer::Stop(void)
+{
+	m_snPreviousTimeInMilliseconds = m_snTimeInMilliseconds;
+}
+
+void CTimer::StartUserPause(void)
+{
+	m_UserPause = true;
+}
+
+void CTimer::EndUserPause(void)
+{
+	m_UserPause = false;
+}
+
+#if 0
+STARTPATCHES	
+	InjectHook(0x4ACE60, CTimer::Initialise, PATCH_JUMP);
+	InjectHook(0x4ACF60, CTimer::Shutdown, PATCH_JUMP);
+	InjectHook(0x4ACF70, CTimer::Update, PATCH_JUMP);
+	InjectHook(0x4AD310, CTimer::Suspend, PATCH_JUMP);
+	InjectHook(0x4AD370, CTimer::Resume, PATCH_JUMP);
+	InjectHook(0x4AD3F0, CTimer::GetCyclesPerMillisecond, PATCH_JUMP);
+	InjectHook(0x4AD410, CTimer::GetCurrentTimeInCycles, PATCH_JUMP);
+	InjectHook(0x4AD450, CTimer::GetIsSlowMotionActive, PATCH_JUMP);
+	InjectHook(0x4AD480, CTimer::Stop, PATCH_JUMP);
+	InjectHook(0x4AD490, CTimer::StartUserPause, PATCH_JUMP);
+	InjectHook(0x4AD4A0, CTimer::EndUserPause, PATCH_JUMP);
+ENDPATCHES
+#endif