System: Add an option to preload CD image to RAM

src/core/host_interface.cpp

@@ -362,6 +362,7 @@ void HostInterface::SetDefaultSettings(SettingsInterface& si)
 
   si.SetBoolValue("CDROM", "ReadThread", true);
   si.SetBoolValue("CDROM", "RegionCheck", true);
+  si.SetBoolValue("CDROM", "LoadImageToRAM", false);
 
   si.SetStringValue("Audio", "Backend", Settings::GetAudioBackendName(Settings::DEFAULT_AUDIO_BACKEND));
   si.SetIntValue("Audio", "OutputVolume", 100);

src/core/settings.cpp

@@ -118,6 +118,7 @@ void Settings::Load(SettingsInterface& si)
 
   cdrom_read_thread = si.GetBoolValue("CDROM", "ReadThread", true);
   cdrom_region_check = si.GetBoolValue("CDROM", "RegionCheck", true);
+  cdrom_load_image_to_ram = si.GetBoolValue("CDROM", "LoadImageToRAM", false);
 
   audio_backend =
     ParseAudioBackend(si.GetStringValue("Audio", "Backend", GetAudioBackendName(DEFAULT_AUDIO_BACKEND)).c_str())
@@ -213,6 +214,7 @@ void Settings::Save(SettingsInterface& si) const
 
   si.SetBoolValue("CDROM", "ReadThread", cdrom_read_thread);
   si.SetBoolValue("CDROM", "RegionCheck", cdrom_region_check);
+  si.SetBoolValue("CDROM", "LoadImageToRAM", cdrom_load_image_to_ram);
 
   si.SetStringValue("Audio", "Backend", GetAudioBackendName(audio_backend));
   si.SetIntValue("Audio", "OutputVolume", audio_output_volume);

src/core/settings.h

@@ -100,6 +100,7 @@ struct Settings
 
   bool cdrom_read_thread = true;
   bool cdrom_region_check = true;
+  bool cdrom_load_image_to_ram = false;
 
   AudioBackend audio_backend = AudioBackend::Cubeb;
   s32 audio_output_volume = 100;

src/core/system.cpp

@@ -14,6 +14,7 @@
 #include "gpu.h"
 #include "host_display.h"
 #include "host_interface.h"
+#include "host_interface_progress_callback.h"
 #include "interrupt_controller.h"
 #include "mdec.h"
 #include "memory_card.h"
@@ -163,6 +164,14 @@ bool System::Boot(const SystemBootParameters& params)
         return false;
       }
 
+      if (params.override_load_image_to_ram.value_or(GetSettings().cdrom_load_image_to_ram))
+      {
+        HostInterfaceProgressCallback callback(m_host_interface);
+        std::unique_ptr<CDImage> memory_image = CDImage::CreateMemoryImage(media.get(), &callback);
+        if (memory_image)
+          media = std::move(memory_image);
+      }
+
       if (m_region == ConsoleRegion::Auto)
       {
         const DiscRegion disc_region = GameList::GetRegionForImage(media.get());

src/core/system.h

@@ -38,6 +38,7 @@ struct SystemBootParameters
   std::string filename;
   std::optional<bool> override_fast_boot;
   std::optional<bool> override_fullscreen;
+  std::optional<bool> override_load_image_to_ram;
   std::unique_ptr<ByteStream> state_stream;
   bool force_software_renderer = false;
 };

src/duckstation-qt/consolesettingswidget.cpp

@@ -26,6 +26,7 @@ ConsoleSettingsWidget::ConsoleSettingsWidget(QtHostInterface* host_interface, QW
                                                Settings::DEFAULT_CPU_EXECUTION_MODE);
   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", false);
 
   connect(m_ui.biosPathBrowse, &QPushButton::pressed, this, &ConsoleSettingsWidget::onBrowseBIOSPathButtonClicked);
 }

src/duckstation-qt/consolesettingswidget.ui

@@ -119,6 +119,13 @@
         </property>
        </widget>
       </item>
+      <item row="2" column="0" colspan="2">
+       <widget class="QCheckBox" name="cdromLoadImageToRAM">
+        <property name="text">
+         <string>Preload Image To RAM</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>

src/duckstation-sdl/sdl_host_interface.cpp

@@ -1109,6 +1109,7 @@ void SDLHostInterface::DrawSettingsWindow()
       {
         settings_changed |= ImGui::Checkbox("Use Read Thread (Asynchronous)", &m_settings_copy.cdrom_read_thread);
         settings_changed |= ImGui::Checkbox("Enable Region Check", &m_settings_copy.cdrom_region_check);
+        settings_changed |= ImGui::Checkbox("Preload Image To RAM", &m_settings_copy.cdrom_load_image_to_ram);
       }
 
       ImGui::NewLine();