FifoPlayer: Generate fake VideoInterface updates

Source/Core/Core/FifoPlayer/FifoDataFile.cpp

@@ -72,6 +72,11 @@ FifoDataFile::FifoDataFile() = default;
 
 FifoDataFile::~FifoDataFile() = default;
 
+bool FifoDataFile::ShouldGenerateFakeVIUpdates() const
+{
+  return true;
+}
+
 bool FifoDataFile::HasBrokenEFBCopies() const
 {
   return m_Version < 2;

Source/Core/Core/FifoPlayer/FifoDataFile.h

@@ -60,6 +60,7 @@ public:
   void SetIsWii(bool isWii);
   bool GetIsWii() const;
   bool HasBrokenEFBCopies() const;
+  bool ShouldGenerateFakeVIUpdates() const;
 
   u32* GetBPMem() { return m_BPMem; }
   u32* GetCPMem() { return m_CPMem; }

Source/Core/Core/FifoPlayer/FifoPlayer.cpp

@@ -162,6 +162,16 @@ std::unique_ptr<CPUCoreBase> FifoPlayer::GetCPUCore()
   return std::make_unique<CPUCore>(this);
 }
 
+bool FifoPlayer::IsRunningWithFakeVideoInterfaceUpdates() const
+{
+  if (!m_File || m_File->GetFrameCount() == 0)
+  {
+    return false;
+  }
+
+  return m_File->ShouldGenerateFakeVIUpdates();
+}
+
 u32 FifoPlayer::GetFrameObjectCount() const
 {
   if (m_CurrentFrame < m_FrameInfo.size())

Source/Core/Core/FifoPlayer/FifoPlayer.h

@@ -94,6 +94,8 @@ public:
   void SetFrameWrittenCallback(CallbackFunc callback) { m_FrameWrittenCb = callback; }
   static FifoPlayer& GetInstance();
 
+  bool IsRunningWithFakeVideoInterfaceUpdates() const;
+
 private:
   class CPUCore;
 

Source/Core/Core/HW/VideoInterface.cpp

@@ -18,6 +18,7 @@
 #include "Core/ConfigManager.h"
 #include "Core/Core.h"
 #include "Core/CoreTiming.h"
+#include "Core/FifoPlayer/FifoPlayer.h"
 #include "Core/HW/MMIO.h"
 #include "Core/HW/ProcessorInterface.h"
 #include "Core/HW/SI/SI.h"
@@ -549,8 +550,9 @@ float GetAspectRatio()
 
   // 5. Calculate the final ratio and scale to 4:3
   float ratio = horizontal_active_ratio / vertical_active_ratio;
-  if (std::isnormal(
-          ratio))  // Check we have a sane ratio and haven't propagated any infs/nans/zeros
+  bool running_fifo_log = FifoPlayer::GetInstance().IsRunningWithFakeVideoInterfaceUpdates();
+  if (std::isnormal(ratio) &&      // Check we have a sane ratio without any infs/nans/zeros
+      !running_fifo_log)           // we don't know the correct ratio for fifos
     return ratio * (4.0f / 3.0f);  // Scale to 4:3
   else
     return (4.0f / 3.0f);  // VI isn't initialized correctly, just return 4:3 instead
@@ -775,4 +777,44 @@ void Update(u64 ticks)
   UpdateInterrupts();
 }
 
+// Create a fake VI mode for a fifolog
+void FakeVIUpdate(u32 xfb_address, u32 fb_width, u32 fb_height)
+{
+  u32 fb_stride = fb_width;
+
+  bool interlaced = fb_height > 480 / 2;
+  if (interlaced)
+  {
+    fb_height = fb_height / 2;
+    fb_stride = fb_stride * 2;
+  }
+
+  m_XFBInfoTop.POFF = 1;
+  m_XFBInfoBottom.POFF = 1;
+  m_VerticalTimingRegister.ACV = fb_height;
+  m_VerticalTimingRegister.EQU = 6;
+  m_VBlankTimingOdd.PRB = 502 - fb_height * 2;
+  m_VBlankTimingOdd.PSB = 5;
+  m_VBlankTimingEven.PRB = 503 - fb_height * 2;
+  m_VBlankTimingEven.PSB = 4;
+  m_PictureConfiguration.WPL = fb_width / 16;
+  m_PictureConfiguration.STD = fb_stride / 16;
+  
+  UpdateParameters();
+  
+  u32 total_halflines = GetHalfLinesPerEvenField() + GetHalfLinesPerOddField();
+
+  if ((s_half_line_count - s_even_field_first_hl) % total_halflines <
+      (s_half_line_count - s_odd_field_first_hl) % total_halflines)
+  {
+    // Even/Bottom field is next.
+    m_XFBInfoBottom.FBB = interlaced ? (xfb_address + fb_width * 2) >> 5 : xfb_address >> 5;
+  }
+  else
+  {
+    // Odd/Top field is next
+    m_XFBInfoTop.FBB = (xfb_address >> 5);
+  }
+}
+
 }  // namespace

Source/Core/Core/HW/VideoInterface.h

@@ -373,4 +373,7 @@ u32 GetTicksPerField();
 // result by 1.33333..
 float GetAspectRatio();
 
+// Create a fake VI mode for a fifolog
+void FakeVIUpdate(u32 xfb_address, u32 fb_width, u32 fb_height);
+
 }  // namespace VideoInterface

Source/Core/VideoCommon/BPStructs.cpp

@@ -12,8 +12,10 @@
 #include "Common/StringUtil.h"
 #include "Common/Thread.h"
 #include "Core/ConfigManager.h"
+#include "Core/FifoPlayer/FifoPlayer.h"
 #include "Core/FifoPlayer/FifoRecorder.h"
 #include "Core/HW/Memmap.h"
+#include "Core/HW/VideoInterface.h"
 
 #include "VideoCommon/BPFunctions.h"
 #include "VideoCommon/BPMemory.h"
@@ -263,6 +265,11 @@ static void BPWritten(const BPCmd& bp)
 
       // This stays in to signal end of a "frame"
       g_renderer->RenderToXFB(destAddr, srcRect, destStride, height, s_gammaLUT[PE_copy.gamma]);
+
+      if (FifoPlayer::GetInstance().IsRunningWithFakeVideoInterfaceUpdates())
+      {
+        VideoInterface::FakeVIUpdate(destAddr, srcRect.GetWidth(), height);
+      }
     }
 
     // Clear the rectangular region after copying it.