general: Rename "Frame Limit" references to "Speed Limit"

This setting is best referred to as a speed limit, as it involves the limits of all timing based aspects of the emulator, not only framerate.
This allows us to differentiate it from the fps unlocker setting.

src/core/core.cpp

@@ -411,7 +411,7 @@ struct System::Impl {
     std::string status_details = "";
 
     std::unique_ptr<Core::PerfStats> perf_stats;
-    Core::FrameLimiter frame_limiter;
+    Core::SpeedLimiter speed_limiter;
 
     bool is_multicore{};
     bool is_async_gpu{};
@@ -606,12 +606,12 @@ const Core::PerfStats& System::GetPerfStats() const {
     return *impl->perf_stats;
 }
 
-Core::FrameLimiter& System::FrameLimiter() {
-    return impl->frame_limiter;
+Core::SpeedLimiter& System::SpeedLimiter() {
+    return impl->speed_limiter;
 }
 
-const Core::FrameLimiter& System::FrameLimiter() const {
-    return impl->frame_limiter;
+const Core::SpeedLimiter& System::SpeedLimiter() const {
+    return impl->speed_limiter;
 }
 
 Loader::ResultStatus System::GetGameName(std::string& out) const {

src/core/core.h

@@ -94,7 +94,7 @@ class ARM_Interface;
 class CpuManager;
 class DeviceMemory;
 class ExclusiveMonitor;
-class FrameLimiter;
+class SpeedLimiter;
 class PerfStats;
 class Reporter;
 class TelemetrySession;
@@ -292,11 +292,11 @@ public:
     /// Provides a constant reference to the internal PerfStats instance.
     [[nodiscard]] const Core::PerfStats& GetPerfStats() const;
 
-    /// Provides a reference to the frame limiter;
-    [[nodiscard]] Core::FrameLimiter& FrameLimiter();
+    /// Provides a reference to the speed limiter;
+    [[nodiscard]] Core::SpeedLimiter& SpeedLimiter();
 
-    /// Provides a constant referent to the frame limiter
-    [[nodiscard]] const Core::FrameLimiter& FrameLimiter() const;
+    /// Provides a constant reference to the speed limiter
+    [[nodiscard]] const Core::SpeedLimiter& SpeedLimiter() const;
 
     /// Gets the name of the current game
     [[nodiscard]] Loader::ResultStatus GetGameName(std::string& out) const;

src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp

@@ -54,7 +54,7 @@ void nvdisp_disp0::flip(u32 buffer_handle, u32 offset, u32 format, u32 width, u3
 
     system.GetPerfStats().EndSystemFrame();
     system.GPU().SwapBuffers(&framebuffer);
-    system.FrameLimiter().DoFrameLimiting(system.CoreTiming().GetGlobalTimeUs());
+    system.SpeedLimiter().DoSpeedLimiting(system.CoreTiming().GetGlobalTimeUs());
     system.GetPerfStats().BeginSystemFrame();
 }
 

src/core/perf_stats.cpp

@@ -127,15 +127,15 @@ double PerfStats::GetLastFrameTimeScale() const {
     return duration_cast<DoubleSecs>(previous_frame_length).count() / FRAME_LENGTH;
 }
 
-void FrameLimiter::DoFrameLimiting(microseconds current_system_time_us) {
-    if (!Settings::values.use_frame_limit.GetValue() ||
+void SpeedLimiter::DoSpeedLimiting(microseconds current_system_time_us) {
+    if (!Settings::values.use_speed_limit.GetValue() ||
         Settings::values.use_multi_core.GetValue()) {
         return;
     }
 
     auto now = Clock::now();
 
-    const double sleep_scale = Settings::values.frame_limit.GetValue() / 100.0;
+    const double sleep_scale = Settings::values.speed_limit.GetValue() / 100.0;
 
     // Max lag caused by slow frames. Shouldn't be more than the length of a frame at the current
     // speed percent or it will clamp too much and prevent this from properly limiting to that
@@ -143,17 +143,17 @@ void FrameLimiter::DoFrameLimiting(microseconds current_system_time_us) {
     // limiting
     const microseconds max_lag_time_us = duration_cast<microseconds>(
         std::chrono::duration<double, std::chrono::microseconds::period>(25ms / sleep_scale));
-    frame_limiting_delta_err += duration_cast<microseconds>(
+    speed_limiting_delta_err += duration_cast<microseconds>(
         std::chrono::duration<double, std::chrono::microseconds::period>(
             (current_system_time_us - previous_system_time_us) / sleep_scale));
-    frame_limiting_delta_err -= duration_cast<microseconds>(now - previous_walltime);
-    frame_limiting_delta_err =
-        std::clamp(frame_limiting_delta_err, -max_lag_time_us, max_lag_time_us);
+    speed_limiting_delta_err -= duration_cast<microseconds>(now - previous_walltime);
+    speed_limiting_delta_err =
+        std::clamp(speed_limiting_delta_err, -max_lag_time_us, max_lag_time_us);
 
-    if (frame_limiting_delta_err > microseconds::zero()) {
-        std::this_thread::sleep_for(frame_limiting_delta_err);
+    if (speed_limiting_delta_err > microseconds::zero()) {
+        std::this_thread::sleep_for(speed_limiting_delta_err);
         auto now_after_sleep = Clock::now();
-        frame_limiting_delta_err -= duration_cast<microseconds>(now_after_sleep - now);
+        speed_limiting_delta_err -= duration_cast<microseconds>(now_after_sleep - now);
         now = now_after_sleep;
     }
 

src/core/perf_stats.h

@@ -85,11 +85,11 @@ private:
     double previous_fps = 0;
 };
 
-class FrameLimiter {
+class SpeedLimiter {
 public:
     using Clock = std::chrono::high_resolution_clock;
 
-    void DoFrameLimiting(std::chrono::microseconds current_system_time_us);
+    void DoSpeedLimiting(std::chrono::microseconds current_system_time_us);
 
 private:
     /// Emulated system time (in microseconds) at the last limiter invocation
@@ -98,7 +98,7 @@ private:
     Clock::time_point previous_walltime = Clock::now();
 
     /// Accumulated difference between walltime and emulated time
-    std::chrono::microseconds frame_limiting_delta_err{0};
+    std::chrono::microseconds speed_limiting_delta_err{0};
 };
 
 } // namespace Core

src/core/telemetry_session.cpp

@@ -221,8 +221,8 @@ void TelemetrySession::AddInitialInfo(Loader::AppLoader& app_loader,
              TranslateRenderer(Settings::values.renderer_backend.GetValue()));
     AddField(field_type, "Renderer_ResolutionFactor",
              Settings::values.resolution_factor.GetValue());
-    AddField(field_type, "Renderer_UseFrameLimit", Settings::values.use_frame_limit.GetValue());
-    AddField(field_type, "Renderer_FrameLimit", Settings::values.frame_limit.GetValue());
+    AddField(field_type, "Renderer_UseSpeedLimit", Settings::values.use_speed_limit.GetValue());
+    AddField(field_type, "Renderer_SpeedLimit", Settings::values.speed_limit.GetValue());
     AddField(field_type, "Renderer_UseDiskShaderCache",
              Settings::values.use_disk_shader_cache.GetValue());
     AddField(field_type, "Renderer_GPUAccuracyLevel",