System: Add 'Fast Forward Boot' option

src/core/fullscreen_ui.cpp

@@ -3266,6 +3266,11 @@ void FullscreenUI::DrawBIOSSettingsPage()
   DrawToggleSetting(bsi, FSUI_CSTR("Enable Fast Boot"),
                     FSUI_CSTR("Patches the BIOS to skip the boot animation. Safe to enable."), "BIOS", "PatchFastBoot",
                     Settings::DEFAULT_FAST_BOOT_VALUE);
+  DrawToggleSetting(bsi, FSUI_CSTR("Fast Forward Boot"),
+                    FSUI_CSTR("Fast forwards through the early loading process when fast booting, saving time. Results "
+                              "may vary between games."),
+                    "BIOS", "FastForwardBoot", false,
+                    GetEffectiveBoolSetting(bsi, "BIOS", "PatchFastBoot", Settings::DEFAULT_FAST_BOOT_VALUE));
   DrawToggleSetting(bsi, FSUI_CSTR("Enable TTY Logging"),
                     FSUI_CSTR("Logs BIOS calls to printf(). Not all games contain debugging messages."), "BIOS",
                     "TTYLogging", false);
@@ -7399,8 +7404,10 @@ TRANSLATE_NOOP("FullscreenUI", "Failed to load '{}'.");
 TRANSLATE_NOOP("FullscreenUI", "Failed to load shader {}. It may be invalid.\nError was:");
 TRANSLATE_NOOP("FullscreenUI", "Failed to save input profile '{}'.");
 TRANSLATE_NOOP("FullscreenUI", "Fast Boot");
+TRANSLATE_NOOP("FullscreenUI", "Fast Forward Boot");
 TRANSLATE_NOOP("FullscreenUI", "Fast Forward Speed");
 TRANSLATE_NOOP("FullscreenUI", "Fast Forward Volume");
+TRANSLATE_NOOP("FullscreenUI", "Fast forwards through the early loading process when fast booting, saving time. Results may vary between games.");
 TRANSLATE_NOOP("FullscreenUI", "File Size");
 TRANSLATE_NOOP("FullscreenUI", "File Size: %.2f MB");
 TRANSLATE_NOOP("FullscreenUI", "File Title");

src/core/settings.cpp

@@ -360,6 +360,7 @@ void Settings::Load(SettingsInterface& si, SettingsInterface& controller_si)
 
   bios_tty_logging = si.GetBoolValue("BIOS", "TTYLogging", false);
   bios_patch_fast_boot = si.GetBoolValue("BIOS", "PatchFastBoot", DEFAULT_FAST_BOOT_VALUE);
+  bios_fast_forward_boot = si.GetBoolValue("BIOS", "FastForwardBoot", false);
 
   multitap_mode =
     ParseMultitapModeName(
@@ -618,6 +619,7 @@ void Settings::Save(SettingsInterface& si, bool ignore_base) const
 
   si.SetBoolValue("BIOS", "TTYLogging", bios_tty_logging);
   si.SetBoolValue("BIOS", "PatchFastBoot", bios_patch_fast_boot);
+  si.SetBoolValue("BIOS", "FastForwardBoot", bios_fast_forward_boot);
 
   for (u32 i = 0; i < NUM_CONTROLLER_AND_CARD_PORTS; i++)
   {
@@ -747,6 +749,9 @@ void Settings::FixIncompatibleSettings(bool display_osd_messages)
     g_settings.bios_patch_fast_boot = false;
   }
 
+  // fast forward boot requires fast boot
+  g_settings.bios_fast_forward_boot = g_settings.bios_patch_fast_boot && g_settings.bios_fast_forward_boot;
+
   if (g_settings.pcdrv_enable && g_settings.pcdrv_root.empty())
   {
     Host::AddKeyedOSDMessage("pcdrv_disabled_no_root",

src/core/settings.h

@@ -258,6 +258,7 @@ struct Settings
 
   bool bios_tty_logging : 1 = false;
   bool bios_patch_fast_boot : 1 = DEFAULT_FAST_BOOT_VALUE;
+  bool bios_fast_forward_boot : 1 = false;
   bool enable_8mb_ram : 1 = false;
 
   std::array<ControllerType, NUM_CONTROLLER_AND_CARD_PORTS> controller_types{};

src/core/system.cpp

@@ -162,6 +162,12 @@ static bool CreateGPU(GPURenderer renderer, bool is_switching, Error* error);
 static bool RecreateGPU(GPURenderer renderer, bool force_recreate_device = false, bool update_display = true);
 static void HandleHostGPUDeviceLost();
 
+/// Returns true if fast forwarding or slow motion is currently active.
+static bool IsRunningAtNonStandardSpeed();
+
+/// Returns true if boot is being fast forwarded.
+static bool IsFastForwardingBoot();
+
 /// Updates the throttle period, call when target emulation speed changes.
 static void UpdateThrottlePeriod();
 static void ResetThrottler();
@@ -1497,6 +1503,10 @@ void System::ResetSystem()
   if (Error error; !SetBootMode(new_boot_mode, &error))
     ERROR_LOG("Failed to reload BIOS on boot mode change, the system may be unstable: {}", error.GetDescription());
 
+  // Have to turn on turbo if fast forwarding boot.
+  if (IsFastForwardingBoot())
+    UpdateSpeedLimiterState();
+
   Host::AddIconOSDMessage("SystemReset", ICON_FA_POWER_OFF, TRANSLATE_STR("OSDMessage", "System reset."),
                           Host::OSD_QUICK_DURATION);
 
@@ -1837,7 +1847,7 @@ bool System::Initialize(bool force_software_renderer, Error* error)
   g_ticks_per_second = ScaleTicksToOverclock(MASTER_CLOCK);
   s_max_slice_ticks = ScaleTicksToOverclock(MASTER_CLOCK / 10);
   s_frame_number = 1;
-  s_internal_frame_number = 1;
+  s_internal_frame_number = 0;
 
   s_target_speed = g_settings.emulation_speed;
   s_throttle_frequency = 60.0f;
@@ -2333,6 +2343,14 @@ void System::SingleStepCPU()
 
 void System::IncrementInternalFrameNumber()
 {
+  if (IsFastForwardingBoot()) [[unlikely]]
+  {
+    // Need to turn off present throttle.
+    s_internal_frame_number++;
+    UpdateSpeedLimiterState();
+    return;
+  }
+
   s_internal_frame_number++;
 }
 
@@ -3368,9 +3386,11 @@ void System::UpdateSpeedLimiterState()
 {
   DebugAssert(IsValid());
 
-  s_target_speed = s_turbo_enabled ?
-                     g_settings.turbo_speed :
-                     (s_fast_forward_enabled ? g_settings.fast_forward_speed : g_settings.emulation_speed);
+  s_target_speed =
+    IsFastForwardingBoot() ?
+      0.0f :
+      (s_turbo_enabled ? g_settings.turbo_speed :
+                         (s_fast_forward_enabled ? g_settings.fast_forward_speed : g_settings.emulation_speed));
   s_throttler_enabled = (s_target_speed != 0.0f);
   s_optimal_frame_pacing = (s_throttler_enabled && g_settings.display_optimal_frame_pacing);
   s_skip_presenting_duplicate_frames = s_throttler_enabled && g_settings.display_skip_presenting_duplicate_frames;
@@ -5090,6 +5110,11 @@ bool System::IsRunningAtNonStandardSpeed()
   return (s_target_speed != 1.0f && !s_syncing_to_host);
 }
 
+bool System::IsFastForwardingBoot()
+{
+  return (g_settings.bios_fast_forward_boot && s_internal_frame_number == 0 && s_boot_mode == BootMode::FastBoot);
+}
+
 s32 System::GetAudioOutputVolume()
 {
   return g_settings.GetAudioOutputVolume(IsRunningAtNonStandardSpeed());

src/core/system.h

@@ -430,9 +430,6 @@ void ApplyCheatCode(u32 index);
 /// Toggle Widescreen Hack and Aspect Ratio
 void ToggleWidescreen();
 
-/// Returns true if fast forwarding or slow motion is currently active.
-bool IsRunningAtNonStandardSpeed();
-
 /// Returns true if vsync should be used.
 GPUVSyncMode GetEffectiveVSyncMode();
 bool ShouldAllowPresentThrottle();