Qt: Add options for CPU overclocking

src/duckstation-qt/consolesettingswidget.cpp

@@ -1,6 +1,9 @@
 #include "consolesettingswidget.h"
+#include "core/system.h"
+#include "qtutils.h"
 #include "settingsdialog.h"
 #include "settingwidgetbinder.h"
+#include <QtWidgets/QMessageBox>
 
 ConsoleSettingsWidget::ConsoleSettingsWidget(QtHostInterface* host_interface, QWidget* parent, SettingsDialog* dialog)
   : QWidget(parent), m_host_interface(host_interface)
@@ -25,6 +28,8 @@ ConsoleSettingsWidget::ConsoleSettingsWidget(QtHostInterface* host_interface, QW
   SettingWidgetBinder::BindWidgetToEnumSetting(m_host_interface, m_ui.cpuExecutionMode, "CPU", "ExecutionMode",
                                                &Settings::ParseCPUExecutionMode, &Settings::GetCPUExecutionModeName,
                                                Settings::DEFAULT_CPU_EXECUTION_MODE);
+  SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.enableCPUClockSpeedControl, "CPU",
+                                               "OverclockEnable", false);
   SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.cdromReadThread, "CDROM", "ReadThread");
   SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.cdromRegionCheck, "CDROM", "RegionCheck");
   SettingWidgetBinder::BindWidgetToBoolSetting(m_host_interface, m_ui.cdromLoadImageToRAM, "CDROM", "LoadImageToRAM",
@@ -34,6 +39,67 @@ ConsoleSettingsWidget::ConsoleSettingsWidget(QtHostInterface* host_interface, QW
     m_ui.cdromLoadImageToRAM, tr("Preload Image to RAM"), tr("Unchecked"),
     tr("Loads the game image into RAM. Useful for network paths that may become unreliable during gameplay. In some "
        "cases also eliminates stutter when games initiate audio track playback."));
+
+  m_ui.cpuClockSpeed->setEnabled(m_ui.enableCPUClockSpeedControl->checkState() == Qt::Checked);
+  connect(m_ui.enableCPUClockSpeedControl, &QCheckBox::stateChanged, this,
+          &ConsoleSettingsWidget::onEnableCPUClockSpeedControlChecked);
+  connect(m_ui.cpuClockSpeed, &QSlider::valueChanged, this, &ConsoleSettingsWidget::onCPUClockSpeedValueChanged);
+
+  calculateCPUClockValue();
 }
 
 ConsoleSettingsWidget::~ConsoleSettingsWidget() = default;
+
+void ConsoleSettingsWidget::onEnableCPUClockSpeedControlChecked(int state)
+{
+  if (state == Qt::Checked && !m_host_interface->GetBoolSettingValue("UI", "CPUOverclockingWarningShown", false))
+  {
+    const QString message =
+      tr("Enabling CPU overclocking will break games, cause bugs, reduce performance and can significantly increase "
+         "system requirements.\n\nBy enabling this option you are agreeing to not create any bug reports unless you "
+         "have confirmed the bug also occurs with overclocking disabled.\n\nThis warning will only be shown once.");
+    const QString yes_button = tr("Yes, I will confirm bugs without overclocking before reporting.");
+    const QString no_button = tr("No, take me back to safety.");
+
+    if (QMessageBox::question(QtUtils::GetRootWidget(this), tr("CPU Overclocking Warning"), message, yes_button,
+                              no_button) != 0)
+    {
+      QSignalBlocker sb(m_ui.enableCPUClockSpeedControl);
+      m_ui.enableCPUClockSpeedControl->setChecked(Qt::Unchecked);
+      return;
+    }
+
+    m_host_interface->SetBoolSettingValue("UI", "CPUOverclockingWarningShown", true);
+  }
+
+  m_ui.cpuClockSpeed->setEnabled(state == Qt::Checked);
+  updateCPUClockSpeedLabel();
+}
+
+void ConsoleSettingsWidget::onCPUClockSpeedValueChanged(int value)
+{
+  const u32 percent = static_cast<u32>(m_ui.cpuClockSpeed->value());
+  u32 numerator, denominator;
+  Settings::CPUOverclockPercentToFraction(percent, &numerator, &denominator);
+  m_host_interface->SetIntSettingValue("CPU", "OverclockNumerator", static_cast<int>(numerator));
+  m_host_interface->SetIntSettingValue("CPU", "OverclockDenominator", static_cast<int>(denominator));
+  updateCPUClockSpeedLabel();
+  m_host_interface->applySettings();
+}
+
+void ConsoleSettingsWidget::updateCPUClockSpeedLabel()
+{
+  const int percent = m_ui.enableCPUClockSpeedControl->isChecked() ? m_ui.cpuClockSpeed->value() : 100;
+  const double frequency = (static_cast<double>(System::MASTER_CLOCK) * static_cast<double>(percent)) / 100.0;
+  m_ui.cpuClockSpeedLabel->setText(tr("%1% (%2MHz)").arg(percent).arg(frequency / 1000000.0, 0, 'f', 2));
+}
+
+void ConsoleSettingsWidget::calculateCPUClockValue()
+{
+  const u32 numerator = static_cast<u32>(m_host_interface->GetIntSettingValue("CPU", "OverclockNumerator", 1));
+  const u32 denominator = static_cast<u32>(m_host_interface->GetIntSettingValue("CPU", "OverclockDenominator", 1));
+  const u32 percent = Settings::CPUOverclockFractionToPercent(numerator, denominator);
+  QSignalBlocker sb(m_ui.cpuClockSpeed);
+  m_ui.cpuClockSpeed->setValue(static_cast<int>(percent));
+  updateCPUClockSpeedLabel();
+}

src/duckstation-qt/consolesettingswidget.h

@@ -15,7 +15,14 @@ public:
   explicit ConsoleSettingsWidget(QtHostInterface* host_interface, QWidget* parent, SettingsDialog* dialog);
   ~ConsoleSettingsWidget();
 
+private Q_SLOTS:
+  void onEnableCPUClockSpeedControlChecked(int state);
+  void onCPUClockSpeedValueChanged(int value);
+  void updateCPUClockSpeedLabel();
+
 private:
+  void calculateCPUClockValue();
+
   Ui::ConsoleSettingsWidget m_ui;
 
   QtHostInterface* m_host_interface;

src/duckstation-qt/consolesettingswidget.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>502</width>
+    <width>541</width>
-    <height>255</height>
+    <height>351</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -64,6 +64,71 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_3">
+     <property name="title">
+      <string>CPU Clock Speed Control</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QCheckBox" name="enableCPUClockSpeedControl">
+          <property name="text">
+           <string>Enable Clock Speed Control (Overclocking/Underclocking)</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+        <item>
+         <widget class="QLabel" name="cpuClockSpeedLabel">
+          <property name="text">
+           <string>100% (effective 33.3mhz)</string>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item row="1" column="0">
+       <widget class="QSlider" name="cpuClockSpeed">
+        <property name="minimum">
+         <number>10</number>
+        </property>
+        <property name="maximum">
+         <number>1000</number>
+        </property>
+        <property name="value">
+         <number>100</number>
+        </property>
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="tickPosition">
+         <enum>QSlider::TicksBothSides</enum>
+        </property>
+        <property name="tickInterval">
+         <number>50</number>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <widget class="QGroupBox" name="groupBox_4">
      <property name="title">