10 files changed, 94 insertions, 25 deletions

diff --git a/src/core/perf_stats.cpp b/src/core/perf_stats.cpp
index 8e09b9b63..c6022c02a 100644
--- a/src/core/perf_stats.cpp
+++ b/src/core/perf_stats.cpp
@@ -78,20 +78,29 @@ void FrameLimiter::DoFrameLimiting(microseconds current_system_time_us) {
     // values increase the time needed to recover and limit framerate again after spikes.
     constexpr microseconds MAX_LAG_TIME_US = 25us;
 
-    if (!Settings::values.toggle_framelimit) {
+    if (!Settings::values.use_frame_limit) {
         return;
     }
 
     auto now = Clock::now();
 
-    frame_limiting_delta_err += current_system_time_us - previous_system_time_us;
+    const double sleep_scale = Settings::values.frame_limit / 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
+    // percent. High values means it'll take longer after a slow frame to recover and start
+    // 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>(
+        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);
+        std::clamp(frame_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);
-
         auto now_after_sleep = Clock::now();
         frame_limiting_delta_err -= duration_cast<microseconds>(now_after_sleep - now);
         now = now_after_sleep;
diff --git a/src/core/settings.h b/src/core/settings.h
index 73dc3061f..ed6f42471 100644
--- a/src/core/settings.h
+++ b/src/core/settings.h
@@ -130,7 +130,8 @@ struct Values {
 
     // Renderer
     float resolution_factor;
-    bool toggle_framelimit;
+    bool use_frame_limit;
+    u16 frame_limit;
     bool use_accurate_framebuffers;
 
     float bg_red;
diff --git a/src/core/telemetry_session.cpp b/src/core/telemetry_session.cpp
index 69aa7a7be..5bd64f10e 100644
--- a/src/core/telemetry_session.cpp
+++ b/src/core/telemetry_session.cpp
@@ -161,8 +161,9 @@ TelemetrySession::TelemetrySession() {
              Settings::values.use_multi_core);
     AddField(Telemetry::FieldType::UserConfig, "Renderer_ResolutionFactor",
              Settings::values.resolution_factor);
-    AddField(Telemetry::FieldType::UserConfig, "Renderer_ToggleFramelimit",
-             Settings::values.toggle_framelimit);
+    AddField(Telemetry::FieldType::UserConfig, "Renderer_UseFrameLimit",
+             Settings::values.use_frame_limit);
+    AddField(Telemetry::FieldType::UserConfig, "Renderer_FrameLimit", Settings::values.frame_limit);
     AddField(Telemetry::FieldType::UserConfig, "Renderer_UseAccurateFramebuffers",
              Settings::values.use_accurate_framebuffers);
     AddField(Telemetry::FieldType::UserConfig, "System_UseDockedMode",
diff --git a/src/video_core/renderer_base.cpp b/src/video_core/renderer_base.cpp
index afd86a83a..c1abdfbfe 100644
--- a/src/video_core/renderer_base.cpp
+++ b/src/video_core/renderer_base.cpp
@@ -20,7 +20,7 @@ void RendererBase::RefreshBaseSettings() {
     RefreshRasterizerSetting();
     UpdateCurrentFramebufferLayout();
 
-    renderer_settings.use_framelimiter = Settings::values.toggle_framelimit;
+    renderer_settings.use_framelimiter = Settings::values.use_frame_limit;
 }
 
 void RendererBase::RefreshRasterizerSetting() {
diff --git a/src/yuzu/configuration/config.cpp b/src/yuzu/configuration/config.cpp
index 0bd46dbac..df55c3e3d 100644
--- a/src/yuzu/configuration/config.cpp
+++ b/src/yuzu/configuration/config.cpp
@@ -83,7 +83,8 @@ void Config::ReadValues() {
 
     qt_config->beginGroup("Renderer");
     Settings::values.resolution_factor = qt_config->value("resolution_factor", 1.0).toFloat();
-    Settings::values.toggle_framelimit = qt_config->value("toggle_framelimit", true).toBool();
+    Settings::values.use_frame_limit = qt_config->value("use_frame_limit", true).toBool();
+    Settings::values.frame_limit = qt_config->value("frame_limit", 100).toInt();
     Settings::values.use_accurate_framebuffers =
         qt_config->value("use_accurate_framebuffers", false).toBool();
 
@@ -203,7 +204,8 @@ void Config::SaveValues() {
 
     qt_config->beginGroup("Renderer");
     qt_config->setValue("resolution_factor", (double)Settings::values.resolution_factor);
-    qt_config->setValue("toggle_framelimit", Settings::values.toggle_framelimit);
+    qt_config->setValue("use_frame_limit", Settings::values.use_frame_limit);
+    qt_config->setValue("frame_limit", Settings::values.frame_limit);
     qt_config->setValue("use_accurate_framebuffers", Settings::values.use_accurate_framebuffers);
 
     // Cast to double because Qt's written float values are not human-readable
diff --git a/src/yuzu/configuration/configure_graphics.cpp b/src/yuzu/configuration/configure_graphics.cpp
index 4afe0f81b..ee1287028 100644
--- a/src/yuzu/configuration/configure_graphics.cpp
+++ b/src/yuzu/configuration/configure_graphics.cpp
@@ -12,6 +12,10 @@ ConfigureGraphics::ConfigureGraphics(QWidget* parent)
 
     ui->setupUi(this);
     this->setConfiguration();
+
+    ui->frame_limit->setEnabled(Settings::values.use_frame_limit);
+    connect(ui->toggle_frame_limit, &QCheckBox::stateChanged, ui->frame_limit,
+            &QSpinBox::setEnabled);
 }
 
 ConfigureGraphics::~ConfigureGraphics() = default;
@@ -58,13 +62,15 @@ Resolution FromResolutionFactor(float factor) {
 void ConfigureGraphics::setConfiguration() {
     ui->resolution_factor_combobox->setCurrentIndex(
         static_cast<int>(FromResolutionFactor(Settings::values.resolution_factor)));
-    ui->toggle_framelimit->setChecked(Settings::values.toggle_framelimit);
+    ui->toggle_frame_limit->setChecked(Settings::values.use_frame_limit);
+    ui->frame_limit->setValue(Settings::values.frame_limit);
     ui->use_accurate_framebuffers->setChecked(Settings::values.use_accurate_framebuffers);
 }
 
 void ConfigureGraphics::applyConfiguration() {
     Settings::values.resolution_factor =
         ToResolutionFactor(static_cast<Resolution>(ui->resolution_factor_combobox->currentIndex()));
-    Settings::values.toggle_framelimit = ui->toggle_framelimit->isChecked();
+    Settings::values.use_frame_limit = ui->toggle_frame_limit->isChecked();
+    Settings::values.frame_limit = ui->frame_limit->value();
     Settings::values.use_accurate_framebuffers = ui->use_accurate_framebuffers->isChecked();
 }
diff --git a/src/yuzu/configuration/configure_graphics.ui b/src/yuzu/configuration/configure_graphics.ui
index 7d092df03..3bc18c26e 100644
--- a/src/yuzu/configuration/configure_graphics.ui
+++ b/src/yuzu/configuration/configure_graphics.ui
@@ -23,11 +23,31 @@
        </property>
        <layout class="QVBoxLayout" name="verticalLayout_2">
         <item>
-         <widget class="QCheckBox" name="toggle_framelimit">
-          <property name="text">
-           <string>Limit framerate</string>
-          </property>
-         </widget>
+          <layout class="QHBoxLayout" name="horizontalLayout_2">
+            <item>
+              <widget class="QCheckBox" name="toggle_frame_limit">
+                <property name="text">
+                  <string>Limit Speed Percent</string>
+                </property>
+              </widget>
+            </item>
+            <item>
+              <widget class="QSpinBox" name="frame_limit">
+                <property name="suffix">
+                  <string>%</string>
+                </property>
+                <property name="minimum">
+                  <number>1</number>
+                </property>
+                <property name="maximum">
+                  <number>9999</number>
+                </property>
+                <property name="value">
+                  <number>100</number>
+                </property>
+              </widget>
+            </item>
+          </layout>
         </item>
         <item>
          <widget class="QCheckBox" name="use_accurate_framebuffers">
diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index 11d2331df..41f765f12 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -226,6 +226,10 @@ void GMainWindow::InitializeHotkeys() {
                                    Qt::ApplicationShortcut);
     hotkey_registry.RegisterHotkey("Main Window", "Toggle Speed Limit", QKeySequence("CTRL+Z"),
                                    Qt::ApplicationShortcut);
+    hotkey_registry.RegisterHotkey("Main Window", "Increase Speed Limit", QKeySequence("+"),
+                                   Qt::ApplicationShortcut);
+    hotkey_registry.RegisterHotkey("Main Window", "Decrease Speed Limit", QKeySequence("-"),
+                                   Qt::ApplicationShortcut);
     hotkey_registry.LoadHotkeys();
 
     connect(hotkey_registry.GetHotkey("Main Window", "Load File", this), &QShortcut::activated,
@@ -255,9 +259,24 @@ void GMainWindow::InitializeHotkeys() {
             });
     connect(hotkey_registry.GetHotkey("Main Window", "Toggle Speed Limit", this),
             &QShortcut::activated, this, [&] {
-                Settings::values.toggle_framelimit = !Settings::values.toggle_framelimit;
+                Settings::values.use_frame_limit = !Settings::values.use_frame_limit;
                 UpdateStatusBar();
             });
+    constexpr u16 SPEED_LIMIT_STEP = 5;
+    connect(hotkey_registry.GetHotkey("Main Window", "Increase Speed Limit", this),
+            &QShortcut::activated, this, [&] {
+                if (Settings::values.frame_limit < 9999 - SPEED_LIMIT_STEP) {
+                    Settings::values.frame_limit += SPEED_LIMIT_STEP;
+                    UpdateStatusBar();
+                }
+            });
+    connect(hotkey_registry.GetHotkey("Main Window", "Decrease Speed Limit", this),
+            &QShortcut::activated, this, [&] {
+                if (Settings::values.frame_limit > SPEED_LIMIT_STEP) {
+                    Settings::values.frame_limit -= SPEED_LIMIT_STEP;
+                    UpdateStatusBar();
+                }
+            });
 }
 
 void GMainWindow::SetDefaultUIGeometry() {
@@ -910,7 +929,13 @@ void GMainWindow::UpdateStatusBar() {
 
     auto results = Core::System::GetInstance().GetAndResetPerfStats();
 
-    emu_speed_label->setText(tr("Speed: %1%").arg(results.emulation_speed * 100.0, 0, 'f', 0));
+    if (Settings::values.use_frame_limit) {
+        emu_speed_label->setText(tr("Speed: %1% / %2%")
+                                     .arg(results.emulation_speed * 100.0, 0, 'f', 0)
+                                     .arg(Settings::values.frame_limit));
+    } else {
+        emu_speed_label->setText(tr("Speed: %1%").arg(results.emulation_speed * 100.0, 0, 'f', 0));
+    }
     game_fps_label->setText(tr("Game: %1 FPS").arg(results.game_fps, 0, 'f', 0));
     emu_frametime_label->setText(tr("Frame: %1 ms").arg(results.frametime * 1000.0, 0, 'f', 2));
 
diff --git a/src/yuzu_cmd/config.cpp b/src/yuzu_cmd/config.cpp
index 9bf26717f..a95580152 100644
--- a/src/yuzu_cmd/config.cpp
+++ b/src/yuzu_cmd/config.cpp
@@ -96,8 +96,9 @@ void Config::ReadValues() {
     // Renderer
     Settings::values.resolution_factor =
         (float)sdl2_config->GetReal("Renderer", "resolution_factor", 1.0);
-    Settings::values.toggle_framelimit =
-        sdl2_config->GetBoolean("Renderer", "toggle_framelimit", true);
+    Settings::values.use_frame_limit = sdl2_config->GetBoolean("Renderer", "use_frame_limit", true);
+    Settings::values.frame_limit =
+        static_cast<u16>(sdl2_config->GetInteger("Renderer", "frame_limit", 100));
     Settings::values.use_accurate_framebuffers =
         sdl2_config->GetBoolean("Renderer", "use_accurate_framebuffers", false);
 
diff --git a/src/yuzu_cmd/default_ini.h b/src/yuzu_cmd/default_ini.h
index 9a935a0d5..6ed9e7962 100644
--- a/src/yuzu_cmd/default_ini.h
+++ b/src/yuzu_cmd/default_ini.h
@@ -102,6 +102,14 @@ resolution_factor =
 # 0 (default): Off, 1: On
 use_vsync =
 
+# Turns on the frame limiter, which will limit frames output to the target game speed
+# 0: Off, 1: On (default)
+use_frame_limit =
+
+# Limits the speed of the game to run no faster than this value as a percentage of target speed
+# 1 - 9999: Speed limit as a percentage of target game speed. 100 (default)
+frame_limit =
+
 # Whether to use accurate framebuffers
 # 0 (default): Off (fast), 1 : On (slow)
 use_accurate_framebuffers =
@@ -132,10 +140,6 @@ custom_bottom_top =
 custom_bottom_right =
 custom_bottom_bottom =
 
-# Whether to toggle frame limiter on or off.
-# 0: Off, 1 (default): On
-toggle_framelimit =
-
 # Swaps the prominent screen with the other screen.
 # For example, if Single Screen is chosen, setting this to 1 will display the bottom screen instead of the top screen.
 # 0 (default): Top Screen is prominent, 1: Bottom Screen is prominent