Implement a frame limiter.

.gitmodules

@@ -57,4 +57,7 @@
 	url = https://github.com/martinus/unordered_dense.git
 [submodule "thirdparty/SDL_mixer"]
 	path = thirdparty/SDL_mixer
-	url = https://github.com/libsdl-org/SDL_mixer
+	url = https://github.com/libsdl-org/SDL_mixer
+[submodule "thirdparty/implot"]
+	path = thirdparty/implot
+	url = https://github.com/epezent/implot.git

UnleashedRecomp/app.cpp

@@ -6,6 +6,32 @@
 #include <user/config.h>
 #include <os/process.h>
 
+void FrameLimiter::execute(int64_t fps)
+{
+    using namespace std::chrono_literals;
+
+    auto next = start + frame * 1000000000ns / fps;
+    auto now = std::chrono::steady_clock::now();
+
+    if (next > now && (next - now) < (2000000000ns / fps))
+    {
+        std::this_thread::sleep_for(std::chrono::floor<std::chrono::milliseconds>(next - now - 1ms));
+
+        while ((now = std::chrono::steady_clock::now()) < next)
+            std::this_thread::yield();
+    }
+
+    frame = std::chrono::nanoseconds(std::chrono::steady_clock::now() - start).count() * fps / 1000000000ll + 1;
+}
+
+static FrameLimiter g_frameLimiter;
+
+void ApplicationUpdateMidAsmHook()
+{
+    if (Config::FPS >= 15 && Config::FPS < 240)
+        g_frameLimiter.execute(Config::FPS);
+}
+
 void App::Restart(std::vector<std::string> restartArgs)
 {
     os::process::StartProcess(os::process::GetExecutablePath(), restartArgs, os::process::GetWorkingDirectory());
@@ -48,3 +74,4 @@ PPC_FUNC(sub_822C1130)
 
     __imp__sub_822C1130(ctx, base);
 }
+

UnleashedRecomp/app.h

@@ -2,6 +2,14 @@
 
 #include <user/config.h>
 
+struct FrameLimiter
+{
+    std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();
+    int64_t frame = 0;
+
+    void execute(int64_t fps);
+};
+
 class App
 {
 public:
@@ -15,3 +23,4 @@ public:
     static void Restart(std::vector<std::string> restartArgs = {});
     static void Exit();
 };
+

UnleashedRecompLib/config/SWA.toml

@@ -588,3 +588,7 @@ registers = ["r3"]
 name = "PostureDPadSupportMidAsmHook"
 address = 0x823CDA2C
 registers = ["r3"]
+
+[[midasm_hook]]
+name = "ApplicationUpdateMidAsmHook"
+address = 0x822C0EC8

thirdparty/implot

@@ -0,0 +1 @@
+Subproject commit 77674d270e851d3f3718aad00234201af2b76ac9