Fix framelimiter's accuracy, thanks to sskkiipp !(issue 1237)

Also added an "auto" mode which automatically limits the framerate to fullspeed and move it from Interface settings to Basic setttings

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3934 8ced0084-cf51-0410-be5f-012b33b47a6e

2 files changed, 33 insertions, 34 deletions

diff --git a/Source/Core/Core/Src/Core.cpp b/Source/Core/Core/Src/Core.cpp
index 6e40c63adc..7c344c0b68 100644
--- a/Source/Core/Core/Src/Core.cpp
+++ b/Source/Core/Core/Src/Core.cpp
@@ -602,38 +602,33 @@ void Callback_VideoCopiedToXFB(bool video_update)
 	static Common::Timer Timer;
 	static u32 frames = 0;
 	static u32 videoupd = 0;
-	static u64 old_frametime=0;
 
 	if (video_update)
 		videoupd++;
 	else
-	{
 		frames++;
 
-		// Custom frame limiter
-		// ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
-
-		u32 targetfps = (SConfig::GetInstance().m_Framelimit)*5;
-		u64 new_frametime;
-		s16 wait_frametime;
-
-		if (targetfps > 0)
-		{	
-			new_frametime = Timer.GetTimeDifference() - old_frametime;
-			old_frametime = Timer.GetTimeDifference();
-			wait_frametime = (1000/targetfps) - (u16)new_frametime;
-			if (targetfps < 35)
-				wait_frametime--;
-			if (wait_frametime > 0)
-				Common::SleepCurrentThread(wait_frametime*2);
-		}
+	// Custom frame limiter
+	// ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
+	u32 targetfps = SConfig::GetInstance().m_Framelimit * 5;
+
+	if (targetfps > 5)
+	{
+		double wait_frametime = (1000.0 / targetfps);
+
+		while (Timer.GetTimeDifference() < wait_frametime * frames)
+			Common::SleepCurrentThread(1);
+	}
+	else if (targetfps < 5)
+	{
+		double wait_frametime = (1000.0 / VideoInterface::TargetRefreshRate);
+
+		while (Timer.GetTimeDifference() < wait_frametime * videoupd)
+			Common::SleepCurrentThread(1);
 	}
 
 	if (Timer.GetTimeDifference() >= 1000)
 	{
-		// reset timer for framelimiter, placed here so no additional check for 1000ms is required -> don't delete please :)
-		old_frametime = 0;
-
 		// Time passed
 		float t = (float)(Timer.GetTimeDifference()) / 1000.f;
 
@@ -656,7 +651,8 @@ void Callback_VideoCopiedToXFB(bool video_update)
 		float FPS = (float)frames / t;
 		// for some reasons "VideoInterface::ActualRefreshRate" gives some odd results :(
 		float VPS = (float)videoupd / t;
-		int TargetVPS = (int)VideoInterface::TargetRefreshRate;
+
+		int TargetVPS = (int)(VideoInterface::TargetRefreshRate + 0.5);
 
 		float Speed = (VPS / TargetVPS) * 100.0f;
 		
diff --git a/Source/Core/DolphinWX/Src/ConfigMain.cpp b/Source/Core/DolphinWX/Src/ConfigMain.cpp
index 2fdf9bf4a5..8217d3404e 100644
--- a/Source/Core/DolphinWX/Src/ConfigMain.cpp
+++ b/Source/Core/DolphinWX/Src/ConfigMain.cpp
@@ -174,8 +174,8 @@ void CConfigMain::CreateGUIControls()
 	// GUI
 	arrayStringFor_InterfaceLang = arrayStringFor_GCSystemLang;
 	// Framelimit
+	arrayStringFor_Framelimit.Add(wxT("auto"));
 	arrayStringFor_Framelimit.Add(wxT("off"));
-	arrayStringFor_Framelimit.Add(wxT("5"));
 	arrayStringFor_Framelimit.Add(wxT("10"));
 	arrayStringFor_Framelimit.Add(wxT("15"));
 	arrayStringFor_Framelimit.Add(wxT("20"));
@@ -213,6 +213,12 @@ void CConfigMain::CreateGUIControls()
 	SkipIdle->SetValue(SConfig::GetInstance().m_LocalCoreStartupParameter.bSkipIdle);
 	EnableCheats = new wxCheckBox(GeneralPage, ID_ENABLECHEATS, wxT("Enable Cheats"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator);
 	EnableCheats->SetValue(SConfig::GetInstance().m_LocalCoreStartupParameter.bEnableCheats);
+	
+	// Framelimit
+	wxStaticText *FramelimitText = new wxStaticText(GeneralPage, ID_FRAMELIMIT_TEXT, wxT("Framelimit :"), wxDefaultPosition, wxDefaultSize);
+	Framelimit = new wxChoice(GeneralPage, ID_FRAMELIMIT, wxDefaultPosition, wxDefaultSize, arrayStringFor_Framelimit, 0, wxDefaultValidator);
+	Framelimit->SetSelection(SConfig::GetInstance().m_Framelimit);
+
 	// Core Settings - Advanced
 	AlwaysUseHLEBIOS = new wxCheckBox(GeneralPage, ID_ALLWAYS_HLEBIOS, wxT("HLE the BIOS all the time"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator);
 	AlwaysUseHLEBIOS->SetValue(SConfig::GetInstance().m_LocalCoreStartupParameter.bHLEBios);
@@ -256,12 +262,7 @@ void CConfigMain::CreateGUIControls()
 	// need redesign
 	InterfaceLang->SetSelection(SConfig::GetInstance().m_InterfaceLanguage);
 
-	// Choose Framelimit
-	wxStaticText *FramelimitText = new wxStaticText(GeneralPage, ID_FRAMELIMIT_TEXT, wxT("Framelimit (experimental):"), wxDefaultPosition, wxDefaultSize);
-	Framelimit = new wxChoice(GeneralPage, ID_FRAMELIMIT, wxDefaultPosition, wxDefaultSize, arrayStringFor_Framelimit, 0, wxDefaultValidator);
-	Framelimit->SetSelection(SConfig::GetInstance().m_Framelimit);
-
-	// Themes
+	// Themes - this should really be a wxChoice...
 	wxArrayString ThemeChoices;
 	ThemeChoices.Add(wxT("Boomy"));
 	ThemeChoices.Add(wxT("Vista"));
@@ -290,6 +291,7 @@ void CConfigMain::CreateGUIControls()
 
 	InterfaceLang->SetToolTip(wxT("For the time being this will only change the text shown in")
 		wxT("\nthe game list of PAL GC games."));
+
 	// Copyright notice
 	Theme->SetItemToolTip(0, wxT("Created by Milosz Wlazlo [miloszwl@miloszwl.com, miloszwl.deviantart.com]"));
 	Theme->SetItemToolTip(1, wxT("Created by VistaIcons.com"));
@@ -302,6 +304,11 @@ void CConfigMain::CreateGUIControls()
 	sbBasic->Add(UseDualCore, 0, wxALL, 5);
 	sbBasic->Add(SkipIdle, 0, wxALL, 5);
 	sbBasic->Add(EnableCheats, 0, wxALL, 5);
+	wxBoxSizer *sFramelimit = new wxBoxSizer(wxHORIZONTAL);
+	sFramelimit->Add(FramelimitText, 0, wxALL | wxALIGN_CENTER, 1);
+	sFramelimit->Add(Framelimit, 0, wxALL | wxEXPAND, 5);
+	sbBasic->Add(sFramelimit, 0, wxALL | wxEXPAND, 5);
+
 	sbAdvanced = new wxStaticBoxSizer(wxVERTICAL, GeneralPage, wxT("Advanced Settings"));
 	sbAdvanced->Add(AlwaysUseHLEBIOS, 0, wxALL, 5);
 	sbAdvanced->Add(UseDynaRec, 0, wxALL, 5);
@@ -330,10 +337,6 @@ void CConfigMain::CreateGUIControls()
 	sInterfaceLanguage->Add(InterfaceLangText, 0, wxALIGN_CENTER_VERTICAL | wxALL, 5);
 	sInterfaceLanguage->Add(InterfaceLang, 0, wxEXPAND | wxALL, 5);
 	sbInterface->Add(sInterfaceLanguage, 0, wxEXPAND | wxALL, 5);
-	wxBoxSizer *sFramelimit = new wxBoxSizer(wxHORIZONTAL);
-	sFramelimit->Add(FramelimitText, 0, wxALIGN_CENTER_VERTICAL | wxALL, 5);
-	sFramelimit->Add(Framelimit, 0, wxEXPAND | wxALL, 5);
-	sbInterface->Add(sFramelimit, 0, wxEXPAND | wxALL, 5);
 
 	// Populate the entire page
 	sGeneralPage = new wxBoxSizer(wxVERTICAL);