Merge pull request #5008 from ligfx/aspectheuristic

VideoCommon: rework anamorphic widescreen heuristic

Source/Core/Core/BootManager.cpp

@@ -290,13 +290,11 @@ bool BootCore(const std::string& _rFilename)
       }
     }
 
-    Core::g_aspect_wide = StartUp.bWii;
-
     // Wii settings
     if (StartUp.bWii)
     {
       IniFile::Section* wii_section = game_ini.GetOrCreateSection("Wii");
-      wii_section->Get("Widescreen", &Core::g_aspect_wide, !!StartUp.m_wii_aspect_ratio);
+      wii_section->Get("Widescreen", &StartUp.m_wii_aspect_ratio, !!StartUp.m_wii_aspect_ratio);
       wii_section->Get("Language", &StartUp.m_wii_language, StartUp.m_wii_language);
 
       int source;

Source/Core/Core/Core.cpp

@@ -81,9 +81,6 @@
 
 namespace Core
 {
-// TODO: ugly, remove
-bool g_aspect_wide;
-
 static bool s_wants_determinism;
 
 // Declarations and definitions

Source/Core/Core/Core.h

@@ -18,9 +18,6 @@
 
 namespace Core
 {
-// TODO: ugly, remove
-extern bool g_aspect_wide;
-
 bool GetIsThrottlerTempDisabled();
 void SetIsThrottlerTempDisabled(bool disable);
 

Source/Core/VideoCommon/RenderBase.cpp

@@ -55,6 +55,8 @@
 #include "VideoCommon/Statistics.h"
 #include "VideoCommon/TextureCacheBase.h"
 #include "VideoCommon/TextureDecoder.h"
+#include "VideoCommon/VertexManagerBase.h"
+#include "VideoCommon/VertexShaderManager.h"
 #include "VideoCommon/VideoConfig.h"
 #include "VideoCommon/XFMemory.h"
 
@@ -89,6 +91,11 @@ Renderer::Renderer(int backbuffer_width, int backbuffer_height)
 
   OSDChoice = 0;
   OSDTime = 0;
+
+  if (SConfig::GetInstance().bWii)
+  {
+    m_aspect_wide = SConfig::GetInstance().m_wii_aspect_ratio != 0;
+  }
 }
 
 Renderer::~Renderer()
@@ -457,7 +464,7 @@ float Renderer::CalculateDrawAspectRatio(int target_width, int target_height) co
 
   // The rendering window aspect ratio as a proportion of the 4:3 or 16:9 ratio
   if (g_ActiveConfig.iAspectRatio == ASPECT_ANALOG_WIDE ||
-      (g_ActiveConfig.iAspectRatio != ASPECT_ANALOG && Core::g_aspect_wide))
+      (g_ActiveConfig.iAspectRatio != ASPECT_ANALOG && m_aspect_wide))
   {
     return (static_cast<float>(target_width) / static_cast<float>(target_height)) /
            AspectToWidescreen(VideoInterface::GetAspectRatio());
@@ -532,7 +539,7 @@ void Renderer::UpdateDrawRectangle()
   if (g_ActiveConfig.bWidescreenHack)
   {
     float source_aspect = VideoInterface::GetAspectRatio();
-    if (Core::g_aspect_wide)
+    if (m_aspect_wide)
       source_aspect = AspectToWidescreen(source_aspect);
     float target_aspect;
 
@@ -652,11 +659,10 @@ void Renderer::SetWindowSize(int width, int height)
   {
     // Force 4:3 or 16:9 by cropping the image.
     float current_aspect = scaled_width / scaled_height;
-    float expected_aspect =
-        (g_ActiveConfig.iAspectRatio == ASPECT_ANALOG_WIDE ||
-         (g_ActiveConfig.iAspectRatio != ASPECT_ANALOG && Core::g_aspect_wide)) ?
-            (16.0f / 9.0f) :
-            (4.0f / 3.0f);
+    float expected_aspect = (g_ActiveConfig.iAspectRatio == ASPECT_ANALOG_WIDE ||
+                             (g_ActiveConfig.iAspectRatio != ASPECT_ANALOG && m_aspect_wide)) ?
+                                (16.0f / 9.0f) :
+                                (4.0f / 3.0f);
     if (current_aspect > expected_aspect)
     {
       // keep height, crop width
@@ -722,6 +728,22 @@ void Renderer::RecordVideoMemory()
 void Renderer::Swap(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight, const EFBRectangle& rc,
                     u64 ticks, float Gamma)
 {
+  // Heuristic to detect if a GameCube game is in 16:9 anamorphic widescreen mode.
+  if (!SConfig::GetInstance().bWii)
+  {
+    size_t flush_count_4_3, flush_count_anamorphic;
+    std::tie(flush_count_4_3, flush_count_anamorphic) =
+        g_vertex_manager->ResetFlushAspectRatioCount();
+    size_t flush_total = flush_count_4_3 + flush_count_anamorphic;
+
+    // Modify the threshold based on which aspect ratio we're already using: if
+    // the game's in 4:3, it probably won't switch to anamorphic, and vice-versa.
+    if (m_aspect_wide)
+      m_aspect_wide = !(flush_count_4_3 > 0.75 * flush_total);
+    else
+      m_aspect_wide = flush_count_anamorphic > 0.75 * flush_total;
+  }
+
   // TODO: merge more generic parts into VideoCommon
   SwapImpl(xfbAddr, fbWidth, fbStride, fbHeight, rc, ticks, Gamma);
 

Source/Core/VideoCommon/RenderBase.h

@@ -159,6 +159,7 @@ protected:
   Common::Event m_screenshot_completed;
   std::mutex m_screenshot_lock;
   std::string m_screenshot_name;
+  bool m_aspect_wide = false;
 
   // The framebuffer size
   int m_target_width = 0;

Source/Core/VideoCommon/VertexManagerBase.cpp

@@ -4,12 +4,14 @@
 
 #include "VideoCommon/VertexManagerBase.h"
 
+#include <cmath>
 #include <memory>
 
 #include "Common/BitSet.h"
 #include "Common/ChunkFile.h"
 #include "Common/CommonTypes.h"
 #include "Common/Logging/Log.h"
+#include "Core/ConfigManager.h"
 
 #include "VideoCommon/BPMemory.h"
 #include "VideoCommon/DataReader.h"
@@ -41,6 +43,23 @@ static const PrimitiveType primitive_from_gx[8] = {
     PRIMITIVE_POINTS,     // GX_DRAW_POINTS
 };
 
+// Due to the BT.601 standard which the GameCube is based on being a compromise
+// between PAL and NTSC, neither standard gets square pixels. They are each off
+// by ~9% in opposite directions.
+// Just in case any game decides to take this into account, we do both these
+// tests with a large amount of slop.
+static bool AspectIs4_3(float width, float height)
+{
+  float aspect = fabsf(width / height);
+  return fabsf(aspect - 4.0f / 3.0f) < 4.0f / 3.0f * 0.11;  // within 11% of 4:3
+}
+
+static bool AspectIs16_9(float width, float height)
+{
+  float aspect = fabsf(width / height);
+  return fabsf(aspect - 16.0f / 9.0f) < 16.0f / 9.0f * 0.11;  // within 11% of 16:9
+}
+
 VertexManagerBase::VertexManagerBase()
 {
 }
@@ -157,6 +176,14 @@ u32 VertexManagerBase::GetRemainingIndices(int primitive)
   }
 }
 
+std::pair<size_t, size_t> VertexManagerBase::ResetFlushAspectRatioCount()
+{
+  std::pair<size_t, size_t> val = std::make_pair(m_flush_count_4_3, m_flush_count_anamorphic);
+  m_flush_count_4_3 = 0;
+  m_flush_count_anamorphic = 0;
+  return val;
+}
+
 void VertexManagerBase::Flush()
 {
   if (m_is_flushed)
@@ -237,6 +264,24 @@ void VertexManagerBase::Flush()
   // set global vertex constants
   VertexShaderManager::SetConstants();
 
+  // Track some stats used elsewhere by the anamorphic widescreen heuristic.
+  if (!SConfig::GetInstance().bWii)
+  {
+    float* rawProjection = xfmem.projection.rawProjection;
+    bool viewport_is_4_3 = AspectIs4_3(xfmem.viewport.wd, xfmem.viewport.ht);
+    if (AspectIs16_9(rawProjection[2], rawProjection[0]) && viewport_is_4_3)
+    {
+      // Projection is 16:9 and viewport is 4:3, we are rendering an anamorphic
+      // widescreen picture.
+      m_flush_count_anamorphic++;
+    }
+    else if (AspectIs4_3(rawProjection[2], rawProjection[0]) && viewport_is_4_3)
+    {
+      // Projection and viewports are both 4:3, we are rendering a normal image.
+      m_flush_count_4_3++;
+    }
+  }
+
   // Calculate ZSlope for zfreeze
   if (!bpmem.genMode.zfreeze)
   {

Source/Core/VideoCommon/VertexManagerBase.h

@@ -61,6 +61,8 @@ public:
 
   void DoState(PointerWrap& p);
 
+  std::pair<size_t, size_t> ResetFlushAspectRatioCount();
+
 protected:
   virtual void vDoState(PointerWrap& p) {}
   PrimitiveType m_current_primitive_type = PrimitiveType::PRIMITIVE_POINTS;
@@ -81,6 +83,8 @@ protected:
 
 private:
   bool m_is_flushed = true;
+  size_t m_flush_count_4_3 = 0;
+  size_t m_flush_count_anamorphic = 0;
 
   virtual void vFlush() = 0;
 

Source/Core/VideoCommon/VertexShaderGen.cpp

@@ -2,7 +2,6 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
-#include <cmath>
 #include <cstring>
 
 #include "Common/Assert.h"

Source/Core/VideoCommon/VertexShaderManager.cpp

@@ -92,23 +92,6 @@ static float PHackValue(std::string sValue)
   return f;
 }
 
-// Due to the BT.601 standard which the GameCube is based on being a compromise
-// between PAL and NTSC, neither standard gets square pixels. They are each off
-// by ~9% in opposite directions.
-// Just in case any game decides to take this into account, we do both these
-// tests with a large amount of slop.
-static bool AspectIs4_3(float width, float height)
-{
-  float aspect = fabsf(width / height);
-  return fabsf(aspect - 4.0f / 3.0f) < 4.0f / 3.0f * 0.11;  // within 11% of 4:3
-}
-
-static bool AspectIs16_9(float width, float height)
-{
-  float aspect = fabsf(width / height);
-  return fabsf(aspect - 16.0f / 9.0f) < 16.0f / 9.0f * 0.11;  // within 11% of 16:9
-}
-
 void UpdateProjectionHack(int iPhackvalue[], std::string sPhackvalue[])
 {
   float fhackvalue1 = 0, fhackvalue2 = 0;
@@ -470,18 +453,6 @@ void VertexShaderManager::SetConstants()
       g_fProjectionMatrix[14] = -1.0f;
       g_fProjectionMatrix[15] = 0.0f;
 
-      // Heuristic to detect if a GameCube game is in 16:9 anamorphic widescreen mode.
-      if (!SConfig::GetInstance().bWii)
-      {
-        bool viewport_is_4_3 = AspectIs4_3(xfmem.viewport.wd, xfmem.viewport.ht);
-        if (AspectIs16_9(rawProjection[2], rawProjection[0]) && viewport_is_4_3)
-          Core::g_aspect_wide = true;  // Projection is 16:9 and viewport is 4:3, we are rendering
-                                       // an anamorphic widescreen picture
-        else if (AspectIs4_3(rawProjection[2], rawProjection[0]) && viewport_is_4_3)
-          Core::g_aspect_wide =
-              false;  // Project and viewports are both 4:3, we are rendering a normal image.
-      }
-
       SETSTAT_FT(stats.gproj_0, g_fProjectionMatrix[0]);
       SETSTAT_FT(stats.gproj_1, g_fProjectionMatrix[1]);
       SETSTAT_FT(stats.gproj_2, g_fProjectionMatrix[2]);