From 197767d1c83f8d940698cd200785e91fbc2ccc98 Mon Sep 17 00:00:00 2001
From: Fire-Head <Fire-Head@users.noreply.github.com>
Date: Wed, 29 May 2019 21:02:58 +0300
Subject: Updates, CTimer started

---
 src/Timer.cpp | 218 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 218 insertions(+)

(limited to 'src/Timer.cpp')

diff --git a/src/Timer.cpp b/src/Timer.cpp
index 9cc35e42..02dbf55a 100644
--- a/src/Timer.cpp
+++ b/src/Timer.cpp
@@ -1,6 +1,10 @@
 #include "common.h"
 #include "patcher.h"
+#include "DMAudio.h"
 #include "Timer.h"
+#include "RecordDataForGame.h"
+#include "RecordDataForChase.h"
+#include <Windows.h>
 
 uint32 &CTimer::m_snTimeInMilliseconds = *(uint32*)0x885B48;
 uint32 &CTimer::m_snTimeInMillisecondsPauseMode = *(uint32*)0x5F7614;
@@ -12,3 +16,217 @@ 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 suspendPcTimer;
+
+UInt32 _nCyclesPerMS = 1;
+
+LARGE_INTEGER _oldPerfCounter;
+LARGE_INTEGER perfSuspendCounter;
+
+UInt32 suspendDepth;
+
+_TODO("We need skeleton.c for RsTimer()");
+
+RwUInt32 RsTimer(void)
+{
+	return ((RwUInt32 (__cdecl *)())0x584890)();
+}
+
+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)
+{
+	;
+}
+
+void CTimer::Update(void)
+{
+	m_snPreviousTimeInMilliseconds = m_snTimeInMilliseconds;
+	
+	if ( (Double)_nCyclesPerMS != 0.0 )
+	{
+		LARGE_INTEGER pc;
+		QueryPerformanceCounter(&pc);
+		
+		Int64 updInCycles = (pc.LowPart - _oldPerfCounter.LowPart) & 0x7FFFFFFF;
+		
+		_oldPerfCounter = pc;
+		
+		Double updInCyclesScaled = (Double)updInCycles * ms_fTimeScale;
+		
+		Double upd = updInCyclesScaled / (Double)_nCyclesPerMS;
+
+		m_snTimeInMillisecondsPauseMode += Int64(upd);
+		
+		if ( GetIsPaused() )
+			ms_fTimeStep = 0.0f;
+		else
+		{
+			m_snTimeInMilliseconds = Int64(upd);
+			m_snTimeInMillisecondsNonClipped += Int64(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(upd);
+															 
+		if ( GetIsPaused() )
+			ms_fTimeStep = 0.0f;
+		else
+		{
+			m_snTimeInMilliseconds += Int64(upd);
+			m_snTimeInMillisecondsNonClipped += Int64(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 != _TODOCONST(2) )
+	{
+		ms_fTimeStep = min(3.0f, ms_fTimeStep);
+
+		if ( (m_snTimeInMilliseconds - m_snPreviousTimeInMilliseconds) > 60 )
+			m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 60;
+	}
+  
+	if ( CRecordDataForChase::Status == _TODOCONST(1) )
+	{
+		ms_fTimeStep = 1.0f;
+		m_snTimeInMilliseconds = m_snPreviousTimeInMilliseconds + 16;
+	}
+  
+	m_FrameCounter++;
+}
+
+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
+
-- 
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