Fixed VBeam emulation in interlaced mode, removing the hacks in the audio timing.

Fixed VBeam emulation in progressive scan mode.
Retained the old VBeam speed hack.  This option has now been switched so that the accurate behaviour is on by default and the speed hack (inaccurate behaviour) is enabled when the option is checked.

Source/Core/Core/Src/HW/DSPHLE/DSPHLE.cpp

@@ -29,6 +29,7 @@
 #include "ConfigManager.h"
 #include "Core.h"
 #include "HW/SystemTimers.h"
+#include "HW/VideoInterface.h"
 
 DSPHLE::DSPHLE() {
 	m_InitMixer = false;
@@ -91,7 +92,7 @@ void DSPHLE::DSP_Update(int cycles)
 u32 DSPHLE::DSP_UpdateRate()
 {
 	// AX HLE uses 3ms (Wii) or 5ms (GC) timing period
-	int fields = SConfig::GetInstance().m_LocalCoreStartupParameter.bVBeam ? 2 : 1;
+	int fields = VideoInterface::GetNumFields();
 	if (m_pUCode != NULL)
 		return (SystemTimers::GetTicksPerSecond() / 1000) * m_pUCode->GetUpdateMs() / fields;
 	else

Source/Core/Core/Src/HW/SystemTimers.cpp

@@ -152,7 +152,7 @@ void DSPCallback(u64 userdata, int cyclesLate)
 
 void AudioDMACallback(u64 userdata, int cyclesLate)
 {
-	int fields = SConfig::GetInstance().m_LocalCoreStartupParameter.bVBeam?2:1;
+	int fields = VideoInterface::GetNumFields();
 	int period = CPU_CORE_CLOCK / (AudioInterface::GetAIDSampleRate() * 4 / 32 * fields);
 	DSP::UpdateAudioDMA();  // Push audio to speakers.
 	CoreTiming::ScheduleEvent(period - cyclesLate, et_AudioDMA);

Source/Core/Core/Src/HW/VideoInterface.cpp

@@ -68,7 +68,7 @@ static u32 TicksPerFrame = 0;
 static u32 s_lineCount = 0;
 static u32 s_upperFieldBegin = 0;
 static u32 s_lowerFieldBegin = 0;
-static int fields = 2;
+static int fields = 1;
 
 void DoState(PointerWrap &p)
 {
@@ -181,7 +181,7 @@ void Init()
 	m_BorderHBlank.Hex = 0;
 	memset(&m_FilterCoefTables, 0, sizeof(m_FilterCoefTables));
 
-	fields = Core::g_CoreStartupParameter.bVBeam ? 1 : 2;
+	fields = 1;
 
 	m_DTVStatus.ntsc_j = Core::g_CoreStartupParameter.bForceNTSCJ;
 
@@ -746,11 +746,13 @@ u32 GetXFBAddressBottom()
 
 void UpdateParameters()
 {
+	fields = m_DisplayControlRegister.NIN ? 2 : 1;
+
     switch (m_DisplayControlRegister.FMT)
     {
     case 0: // NTSC
 		TargetRefreshRate = NTSC_FIELD_RATE;
-		TicksPerFrame = SystemTimers::GetTicksPerSecond() / (NTSC_FIELD_RATE / fields);
+		TicksPerFrame = SystemTimers::GetTicksPerSecond() / NTSC_FIELD_RATE;
 		s_lineCount = NTSC_LINE_COUNT;
 		s_upperFieldBegin = NTSC_UPPER_BEGIN;
 		s_lowerFieldBegin = NTSC_LOWER_BEGIN;
@@ -758,7 +760,7 @@ void UpdateParameters()
 
     case 2: // PAL-M
 		TargetRefreshRate = NTSC_FIELD_RATE;
-		TicksPerFrame = SystemTimers::GetTicksPerSecond() / (NTSC_FIELD_RATE / fields);
+		TicksPerFrame = SystemTimers::GetTicksPerSecond() / NTSC_FIELD_RATE;
 		s_lineCount = PAL_LINE_COUNT;
 		s_upperFieldBegin = PAL_UPPER_BEGIN;
 		s_lowerFieldBegin = PAL_LOWER_BEGIN;
@@ -766,7 +768,7 @@ void UpdateParameters()
 
     case 1: // PAL
 		TargetRefreshRate = PAL_FIELD_RATE;
-		TicksPerFrame = SystemTimers::GetTicksPerSecond() / (PAL_FIELD_RATE / fields);
+		TicksPerFrame = SystemTimers::GetTicksPerSecond() / PAL_FIELD_RATE;
 		s_lineCount = PAL_LINE_COUNT;
 		s_upperFieldBegin = PAL_UPPER_BEGIN;
 		s_lowerFieldBegin = PAL_LOWER_BEGIN;
@@ -782,6 +784,14 @@ void UpdateParameters()
     }
 }
 
+int GetNumFields()
+{
+	if (Core::g_CoreStartupParameter.bVBeam)
+		return (2 / fields);
+	else
+		return 1;
+}
+
 unsigned int GetTicksPerLine()
 {
 	if (s_lineCount == 0)
@@ -790,7 +800,10 @@ unsigned int GetTicksPerLine()
 	}
 	else
 	{
-		return TicksPerFrame / (s_lineCount * fields);
+		if (Core::g_CoreStartupParameter.bVBeam)
+			return TicksPerFrame / s_lineCount;
+		else
+			return TicksPerFrame / (s_lineCount / (2 / fields)) ;
 	}
 }
 
@@ -831,39 +844,27 @@ static void EndField()
 // Run when: When a frame is scanned (progressive/interlace)
 void Update()
 {
-	u16 NewVBeamPos = 0;
-
 	if (m_DisplayControlRegister.NIN)
 	{
 		// Progressive
-		NewVBeamPos = s_lineCount + 1;
 		if (m_VBeamPos == 1)
 			BeginField(FIELD_PROGRESSIVE);
 	}
 	else if (m_VBeamPos == s_upperFieldBegin)
 	{
 		// Interlace Upper
-		NewVBeamPos = s_lineCount * 2;
 		BeginField(FIELD_UPPER);
 	}
 	else if (m_VBeamPos == s_lowerFieldBegin)
 	{
 		// Interlace Lower
-		NewVBeamPos = s_lineCount;
 		BeginField(FIELD_LOWER);
 	}
 
-	if (m_DisplayControlRegister.NIN)
+	if (m_VBeamPos == s_upperFieldBegin + m_VerticalTimingRegister.ACV)
 	{
-		// Progressive
+		// Interlace Upper.
-		if (m_VBeamPos == s_lineCount)
+		EndField();
-			EndField();
-	}
-	else if (m_VBeamPos == s_upperFieldBegin + m_VerticalTimingRegister.ACV)
-	{
-		// Interlace Upper.  Do not EndField (swapBuffer) at the end of the upper field.
-		if (Core::g_CoreStartupParameter.bVBeam)
-			EndField();
 	}
 	else if (m_VBeamPos == s_lowerFieldBegin + m_VerticalTimingRegister.ACV)
 	{
@@ -871,8 +872,8 @@ void Update()
 		EndField();
 	}
 
-	if (++m_VBeamPos > s_lineCount)
+	if (++m_VBeamPos > s_lineCount * fields)
-		m_VBeamPos = (NewVBeamPos > s_lineCount || Core::g_CoreStartupParameter.bVBeam) ? 1 : NewVBeamPos;
+		m_VBeamPos = 1;
 
 	for (int i = 0; i < 4; i++)
 	{

Source/Core/Core/Src/HW/VideoInterface.h

@@ -359,6 +359,8 @@ union UVIDTVStatus
 
 	unsigned int GetTicksPerLine();
 	unsigned int GetTicksPerFrame();
+
+	int GetNumFields();
 };
 
 #endif // _VIDEOINTERFACE_H

Source/Core/DolphinWX/Src/ISOProperties.cpp

@@ -327,8 +327,8 @@ void CISOProperties::CreateGUIControls(bool IsWad)
 	TLBHack->SetToolTip(_("Fast version of the MMU.  Does not work for every game."));
 	DCBZOFF = new wxCheckBox(m_GameConfig, ID_DCBZOFF, _("Skip DCBZ clearing"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER, wxDefaultValidator);
 	DCBZOFF->SetToolTip(_("Bypass the clearing of the data cache by the DCBZ instruction. Usually leave this option disabled."));
-	VBeam = new wxCheckBox(m_GameConfig, ID_VBEAM, _("Accurate VBeam emulation"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER, wxDefaultValidator);
+	VBeam = new wxCheckBox(m_GameConfig, ID_VBEAM, _("VBeam Speed Hack"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER, wxDefaultValidator);
-	VBeam->SetToolTip(_("If the FPS is erratic, this option may help. (ON = Compatible, OFF = Fast)"));
+	VBeam->SetToolTip(_("Doubles the emulated GPU clock rate. May speed up some games (ON = Fast, OFF = Compatible)"));
 	SyncGPU = new wxCheckBox(m_GameConfig, ID_SYNCGPU, _("Synchronize GPU thread"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER, wxDefaultValidator);
 	SyncGPU->SetToolTip(_("Synchronizes the GPU and CPU threads to help prevent random freezes in Dual Core mode. (ON = Compatible, OFF = Fast)"));
 	FastDiscSpeed = new wxCheckBox(m_GameConfig, ID_DISCSPEED, _("Speed up Disc Transfer Rate"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER, wxDefaultValidator);