From 9656332356fcf29f61a1e7db1ab2ed1a6bb68f7b Mon Sep 17 00:00:00 2001
From: iwubcode <iwubcode@users.noreply.github.com>
Date: Thu, 11 Dec 2025 21:10:19 -0600
Subject: [PATCH] Core: add game id to fifo logs, this makes it easier to test
 graphical enhancements which use the game id to load

---
 Source/Core/Core/ConfigManager.cpp           | 11 +++++++-
 Source/Core/Core/ConfigManager.h             |  2 ++
 Source/Core/Core/FifoPlayer/FifoDataFile.cpp | 28 ++++++++++++++++++--
 Source/Core/Core/FifoPlayer/FifoDataFile.h   |  4 +++
 4 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/Source/Core/Core/ConfigManager.cpp b/Source/Core/Core/ConfigManager.cpp
index a2c2ac1f0f..b2e682c42f 100644
--- a/Source/Core/Core/ConfigManager.cpp
+++ b/Source/Core/Core/ConfigManager.cpp
@@ -435,7 +435,16 @@ struct SetGameMetadata
 
     *region = DiscIO::Region::NTSC_U;
     system.SetIsWii(dff_file->GetIsWii());
-    Host_TitleChanged();
+
+    const std::string& game_id = dff_file->GetGameId();
+    if (game_id == DEFAULT_GAME_ID)
+    {
+      Host_TitleChanged();
+    }
+    else
+    {
+      config->SetRunningGameMetadata(game_id);
+    }
 
     return true;
   }
diff --git a/Source/Core/Core/ConfigManager.h b/Source/Core/Core/ConfigManager.h
index e255974d8b..4cb78d88b8 100644
--- a/Source/Core/Core/ConfigManager.h
+++ b/Source/Core/Core/ConfigManager.h
@@ -42,6 +42,8 @@ class TMDReader;
 
 struct BootParameters;
 
+static constexpr std::string_view DEFAULT_GAME_ID = "00000000";
+
 struct SConfig
 {
   // Settings
diff --git a/Source/Core/Core/FifoPlayer/FifoDataFile.cpp b/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
index 27899d6e3e..1e7ec5d77e 100644
--- a/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
+++ b/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
@@ -12,11 +12,12 @@
 #include "Common/IOFile.h"
 #include "Common/MsgHandler.h"
 #include "Core/Config/MainSettings.h"
+#include "Core/ConfigManager.h"
 #include "Core/HW/Memmap.h"
 #include "Core/System.h"
 
 constexpr u32 FILE_ID = 0x0d01f1f0;
-constexpr u32 VERSION_NUMBER = 5;
+constexpr u32 VERSION_NUMBER = 6;
 constexpr u32 MIN_LOADER_VERSION = 1;
 // This value is only used if the DFF file was created with overridden RAM sizes.
 // If the MIN_LOADER_VERSION ever exceeds this, it's alright to remove it.
@@ -46,9 +47,11 @@ struct FileHeader
   // will crash and burn with mismatched settings.  See PR #8722.
   u32 mem1_size;
   u32 mem2_size;
-  u8 reserved[32];
+  char gameid[8];
+  u8 reserved[24];
 };
 static_assert(sizeof(FileHeader) == 128, "FileHeader should be 128 bytes");
+static_assert(DEFAULT_GAME_ID.size() == sizeof(FileHeader::gameid), "Default game id size changed");
 
 struct FileFrameInfo
 {
@@ -167,6 +170,17 @@ bool FifoDataFile::Save(const std::string& filename)
   header.mem1_size = memory.GetRamSizeReal();
   header.mem2_size = memory.GetExRamSizeReal();
 
+  const auto gameid = SConfig::GetInstance().GetGameID();
+  if (gameid.size() > DEFAULT_GAME_ID.size())
+  {
+    // Custom game id?  Won't fit, just use default
+    std::memcpy(header.gameid, DEFAULT_GAME_ID.data(), DEFAULT_GAME_ID.size());
+  }
+  else
+  {
+    std::strncpy(header.gameid, gameid.c_str(), DEFAULT_GAME_ID.size());
+  }
+
   file.Seek(0, File::SeekOrigin::Begin);
   file.WriteBytes(&header, sizeof(FileHeader));
 
@@ -253,6 +267,16 @@ std::unique_ptr<FifoDataFile> FifoDataFile::Load(const std::string& filename, bo
   dataFile->m_Flags = header.flags;
   dataFile->m_Version = header.file_version;
 
+  // Official support for game id was added in version 6
+  if (header.file_version < 6)
+  {
+    dataFile->m_game_id = DEFAULT_GAME_ID;
+  }
+  else
+  {
+    dataFile->m_game_id = std::string{header.gameid, DEFAULT_GAME_ID.size()};
+  }
+
   if (flagsOnly)
   {
     // Force settings to match those used when the DFF was created.  This is sort of a hack.
diff --git a/Source/Core/Core/FifoPlayer/FifoDataFile.h b/Source/Core/Core/FifoPlayer/FifoDataFile.h
index dc4f7915da..f0fd098eaa 100644
--- a/Source/Core/Core/FifoPlayer/FifoDataFile.h
+++ b/Source/Core/Core/FifoPlayer/FifoDataFile.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "Common/CommonTypes.h"
+#include "Core/ConfigManager.h"
 #include "VideoCommon/XFMemory.h"
 
 namespace File
@@ -71,6 +72,7 @@ public:
   u8* GetTexMem() { return m_TexMem.data(); }
   u32 GetRamSizeReal() { return m_ram_size_real; }
   u32 GetExRamSizeReal() { return m_exram_size_real; }
+  const std::string& GetGameId() const { return m_game_id; }
 
   void AddFrame(const FifoFrameInfo& frameInfo);
   const FifoFrameInfo& GetFrame(u32 frame) const { return m_Frames[frame]; }
@@ -102,6 +104,8 @@ private:
   u32 m_ram_size_real = 0;
   u32 m_exram_size_real = 0;
 
+  std::string m_game_id = std::string{DEFAULT_GAME_ID};
+
   u32 m_Flags = 0;
   u32 m_Version = 0;