Duckstation/src/core/settings.h

// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)

#pragma once
#include "common/log.h"
#include "common/settings_interface.h"
#include "common/small_string.h"
#include "types.h"
#include "util/audio_stream.h"
#include <array>
#include <optional>
#include <string>
#include <vector>

enum class RenderAPI : u32;

struct SettingInfo
{
  enum class Type
  {
    Boolean,
    Integer,
    IntegerList,
    Float,
    String,
    Path,
  };

  Type type;
  const char* name;
  const char* display_name;
  const char* description;
  const char* default_value;
  const char* min_value;
  const char* max_value;
  const char* step_value;
  const char* format;
  const char** options;
  float multiplier;

  const char* StringDefaultValue() const;
  bool BooleanDefaultValue() const;
  s32 IntegerDefaultValue() const;
  s32 IntegerMinValue() const;
  s32 IntegerMaxValue() const;
  s32 IntegerStepValue() const;
  float FloatDefaultValue() const;
  float FloatMinValue() const;
  float FloatMaxValue() const;
  float FloatStepValue() const;
};

struct Settings
{
  Settings();

  ConsoleRegion region = DEFAULT_CONSOLE_REGION;

  CPUExecutionMode cpu_execution_mode = DEFAULT_CPU_EXECUTION_MODE;
  u32 cpu_overclock_numerator = 1;
  u32 cpu_overclock_denominator = 1;
  bool cpu_overclock_enable = false;
  bool cpu_overclock_active = false;
  bool cpu_recompiler_memory_exceptions = false;
  bool cpu_recompiler_block_linking = true;
  bool cpu_recompiler_icache = false;
  CPUFastmemMode cpu_fastmem_mode = DEFAULT_CPU_FASTMEM_MODE;

  float emulation_speed = 1.0f;
  float fast_forward_speed = 0.0f;
  float turbo_speed = 0.0f;
  bool sync_to_host_refresh_rate = false;
  bool increase_timer_resolution = true;
  bool inhibit_screensaver = true;
  bool start_paused = false;
  bool start_fullscreen = false;
  bool pause_on_focus_loss = false;
  bool save_state_on_exit = true;
  bool create_save_state_backups = DEFAULT_SAVE_STATE_BACKUPS;
  bool compress_save_states = DEFAULT_SAVE_STATE_COMPRESSION;
  bool confim_power_off = true;
  bool load_devices_from_save_states = false;
  bool apply_compatibility_settings = true;
  bool apply_game_settings = true;
  bool auto_load_cheats = true;
  bool disable_all_enhancements = false;
  bool enable_discord_presence = false;

  bool rewind_enable = false;
  float rewind_save_frequency = 10.0f;
  u32 rewind_save_slots = 10;
  u32 runahead_frames = 0;

  GPURenderer gpu_renderer = DEFAULT_GPU_RENDERER;
  std::string gpu_adapter;
  u32 gpu_resolution_scale = 1;
  u32 gpu_multisamples = 1;
  bool gpu_use_thread = true;
  bool gpu_use_software_renderer_for_readbacks = false;
  bool gpu_threaded_presentation = true;
  bool gpu_use_debug_device = false;
  bool gpu_disable_shader_cache = false;
  bool gpu_disable_dual_source_blend = false;
  bool gpu_disable_framebuffer_fetch = false;
  bool gpu_per_sample_shading = false;
  bool gpu_true_color = true;
  bool gpu_scaled_dithering = true;
  GPUTextureFilter gpu_texture_filter = DEFAULT_GPU_TEXTURE_FILTER;
  GPUDownsampleMode gpu_downsample_mode = DEFAULT_GPU_DOWNSAMPLE_MODE;
  u8 gpu_downsample_scale = 1;
  GPUWireframeMode gpu_wireframe_mode = DEFAULT_GPU_WIREFRAME_MODE;
  bool gpu_disable_interlacing = true;
  bool gpu_force_ntsc_timings = false;
  bool gpu_widescreen_hack = false;
  bool gpu_pgxp_enable = false;
  bool gpu_pgxp_culling = true;
  bool gpu_pgxp_texture_correction = true;
  bool gpu_pgxp_color_correction = false;
  bool gpu_pgxp_vertex_cache = false;
  bool gpu_pgxp_cpu = false;
  bool gpu_pgxp_preserve_proj_fp = false;
  bool gpu_pgxp_depth_buffer = false;
  DisplayCropMode display_crop_mode = DEFAULT_DISPLAY_CROP_MODE;
  DisplayAspectRatio display_aspect_ratio = DEFAULT_DISPLAY_ASPECT_RATIO;
  DisplayAlignment display_alignment = DEFAULT_DISPLAY_ALIGNMENT;
  DisplayScalingMode display_scaling = DEFAULT_DISPLAY_SCALING;
  u16 display_aspect_ratio_custom_numerator = 0;
  u16 display_aspect_ratio_custom_denominator = 0;
  s16 display_active_start_offset = 0;
  s16 display_active_end_offset = 0;
  s8 display_line_start_offset = 0;
  s8 display_line_end_offset = 0;
  bool display_force_4_3_for_24bit = false;
  bool gpu_24bit_chroma_smoothing = false;
  bool display_show_osd_messages = true;
  bool display_show_fps = false;
  bool display_show_speed = false;
  bool display_show_resolution = false;
  bool display_show_cpu = false;
  bool display_show_gpu = false;
  bool display_show_frame_times = false;
  bool display_show_status_indicators = true;
  bool display_show_inputs = false;
  bool display_show_enhancements = false;
  bool display_all_frames = false;
  bool display_internal_resolution_screenshots = false;
  bool display_stretch_vertically = false;
  bool video_sync_enabled = DEFAULT_VSYNC_VALUE;
  float display_osd_scale = 100.0f;
  float display_max_fps = DEFAULT_DISPLAY_MAX_FPS;
  float gpu_pgxp_tolerance = -1.0f;
  float gpu_pgxp_depth_clear_threshold = DEFAULT_GPU_PGXP_DEPTH_THRESHOLD / GPU_PGXP_DEPTH_THRESHOLD_SCALE;

  u8 cdrom_readahead_sectors = DEFAULT_CDROM_READAHEAD_SECTORS;
  CDROMMechaconVersion cdrom_mechacon_version = DEFAULT_CDROM_MECHACON_VERSION;
  bool cdrom_region_check = false;
  bool cdrom_load_image_to_ram = false;
  bool cdrom_load_image_patches = false;
  bool cdrom_mute_cd_audio = false;
  u32 cdrom_read_speedup = 1;
  u32 cdrom_seek_speedup = 1;

  AudioBackend audio_backend = DEFAULT_AUDIO_BACKEND;
  AudioStretchMode audio_stretch_mode = DEFAULT_AUDIO_STRETCH_MODE;
  std::string audio_driver;
  std::string audio_output_device;
  u32 audio_output_latency_ms = DEFAULT_AUDIO_OUTPUT_LATENCY_MS;
  u32 audio_buffer_ms = DEFAULT_AUDIO_BUFFER_MS;
  u32 audio_output_volume = 100;
  u32 audio_fast_forward_volume = 100;
  bool audio_output_muted = false;
  bool audio_dump_on_boot = false;

  bool use_old_mdec_routines = false;
  bool pcdrv_enable = false;

  // timing hacks section
  TickCount dma_max_slice_ticks = DEFAULT_DMA_MAX_SLICE_TICKS;
  TickCount dma_halt_ticks = DEFAULT_DMA_HALT_TICKS;
  u32 gpu_fifo_size = DEFAULT_GPU_FIFO_SIZE;
  TickCount gpu_max_run_ahead = DEFAULT_GPU_MAX_RUN_AHEAD;

  // achievements
  bool achievements_enabled = false;
  bool achievements_hardcore_mode = false;
  bool achievements_notifications = true;
  bool achievements_leaderboard_notifications = true;
  bool achievements_sound_effects = true;
  bool achievements_overlays = true;
  bool achievements_encore_mode = false;
  bool achievements_spectator_mode = false;
  bool achievements_unofficial_test_mode = false;
  bool achievements_use_first_disc_from_playlist = true;
  bool achievements_use_raintegration = false;
  s32 achievements_notification_duration = DEFAULT_ACHIEVEMENT_NOTIFICATION_TIME;
  s32 achievements_leaderboard_duration = DEFAULT_LEADERBOARD_NOTIFICATION_TIME;

  struct DebugSettings
  {
    bool show_vram = false;
    bool dump_cpu_to_vram_copies = false;
    bool dump_vram_to_cpu_copies = false;

    bool enable_gdb_server = false;
    u16 gdb_server_port = 1234;

    // Mutable because the imgui window can close itself.
    mutable bool show_gpu_state = false;
    mutable bool show_cdrom_state = false;
    mutable bool show_spu_state = false;
    mutable bool show_timers_state = false;
    mutable bool show_mdec_state = false;
    mutable bool show_dma_state = false;
  } debugging;

  // texture replacements
  struct TextureReplacementSettings
  {
    bool enable_vram_write_replacements = false;
    bool preload_textures = false;

    bool dump_vram_writes = false;
    bool dump_vram_write_force_alpha_channel = true;
    u32 dump_vram_write_width_threshold = 128;
    u32 dump_vram_write_height_threshold = 128;

    ALWAYS_INLINE bool AnyReplacementsEnabled() const { return enable_vram_write_replacements; }

    ALWAYS_INLINE bool ShouldDumpVRAMWrite(u32 width, u32 height)
    {
      return dump_vram_writes && width >= dump_vram_write_width_threshold && height >= dump_vram_write_height_threshold;
    }
  } texture_replacements;

  bool bios_tty_logging = false;
  bool bios_patch_fast_boot = DEFAULT_FAST_BOOT_VALUE;
  bool enable_8mb_ram = false;

  std::array<ControllerType, NUM_CONTROLLER_AND_CARD_PORTS> controller_types{};
  bool controller_disable_analog_mode_forcing = false;

  std::array<MemoryCardType, NUM_CONTROLLER_AND_CARD_PORTS> memory_card_types{};
  std::array<std::string, NUM_CONTROLLER_AND_CARD_PORTS> memory_card_paths{};
  bool memory_card_use_playlist_title = true;

  MultitapMode multitap_mode = DEFAULT_MULTITAP_MODE;

  std::string pcdrv_root;
  bool pcdrv_enable_writes = false;

  LOGLEVEL log_level = DEFAULT_LOG_LEVEL;
  std::string log_filter;
  bool log_timestamps = true;
  bool log_to_console = DEFAULT_LOG_TO_CONSOLE;
  bool log_to_debug = false;
  bool log_to_window = false;
  bool log_to_file = false;

  ALWAYS_INLINE bool IsUsingSoftwareRenderer() const { return (gpu_renderer == GPURenderer::Software); }
  ALWAYS_INLINE bool IsRunaheadEnabled() const { return (runahead_frames > 0); }

  ALWAYS_INLINE PGXPMode GetPGXPMode()
  {
    return gpu_pgxp_enable ? (gpu_pgxp_cpu ? PGXPMode::CPU : PGXPMode::Memory) : PGXPMode::Disabled;
  }

  ALWAYS_INLINE bool UsingPGXPDepthBuffer() const { return gpu_pgxp_enable && gpu_pgxp_depth_buffer; }
  ALWAYS_INLINE bool UsingPGXPCPUMode() const { return gpu_pgxp_enable && gpu_pgxp_cpu; }
  ALWAYS_INLINE float GetPGXPDepthClearThreshold() const
  {
    return gpu_pgxp_depth_clear_threshold * GPU_PGXP_DEPTH_THRESHOLD_SCALE;
  }
  ALWAYS_INLINE void SetPGXPDepthClearThreshold(float value)
  {
    gpu_pgxp_depth_clear_threshold = value / GPU_PGXP_DEPTH_THRESHOLD_SCALE;
  }

  ALWAYS_INLINE s32 GetAudioOutputVolume(bool fast_forwarding) const
  {
    return audio_output_muted ? 0 : (fast_forwarding ? audio_fast_forward_volume : audio_output_volume);
  }

  float GetDisplayAspectRatioValue() const;

  ALWAYS_INLINE bool IsPort1MultitapEnabled() const
  {
    return (multitap_mode == MultitapMode::Port1Only || multitap_mode == MultitapMode::BothPorts);
  }
  ALWAYS_INLINE bool IsPort2MultitapEnabled() const
  {
    return (multitap_mode == MultitapMode::Port1Only || multitap_mode == MultitapMode::BothPorts);
  }
  ALWAYS_INLINE bool IsMultitapPortEnabled(u32 port) const
  {
    return (port == 0) ? IsPort1MultitapEnabled() : IsPort2MultitapEnabled();
  }

  ALWAYS_INLINE static bool IsPerGameMemoryCardType(MemoryCardType type)
  {
    return (type == MemoryCardType::PerGame || type == MemoryCardType::PerGameTitle ||
            type == MemoryCardType::PerGameFileTitle);
  }
  bool HasAnyPerGameMemoryCards() const;

  /// Returns the default path to a memory card.
  static std::string GetDefaultSharedMemoryCardName(u32 slot);
  std::string GetSharedMemoryCardPath(u32 slot) const;

  /// Returns the default path to a memory card for a specific game.
  static std::string GetGameMemoryCardPath(const std::string_view& serial, u32 slot);

  static void CPUOverclockPercentToFraction(u32 percent, u32* numerator, u32* denominator);
  static u32 CPUOverclockFractionToPercent(u32 numerator, u32 denominator);

  void SetCPUOverclockPercent(u32 percent);
  u32 GetCPUOverclockPercent() const;
  void UpdateOverclockActive();

  enum : u32
  {
    DEFAULT_DMA_MAX_SLICE_TICKS = 1000,
    DEFAULT_DMA_HALT_TICKS = 100,
    DEFAULT_GPU_FIFO_SIZE = 16,
    DEFAULT_GPU_MAX_RUN_AHEAD = 128,
    DEFAULT_VRAM_WRITE_DUMP_WIDTH_THRESHOLD = 128,
    DEFAULT_VRAM_WRITE_DUMP_HEIGHT_THRESHOLD = 128,
  };

  void Load(SettingsInterface& si);
  void Save(SettingsInterface& si) const;

  void FixIncompatibleSettings(bool display_osd_messages);

  /// Initializes configuration.
  void UpdateLogSettings();

  static void SetDefaultControllerConfig(SettingsInterface& si);
  static void SetDefaultHotkeyConfig(SettingsInterface& si);

  static std::optional<LOGLEVEL> ParseLogLevelName(const char* str);
  static const char* GetLogLevelName(LOGLEVEL level);
  static const char* GetLogLevelDisplayName(LOGLEVEL level);
  static std::span<const char*> GetLogFilters();

  static std::optional<ConsoleRegion> ParseConsoleRegionName(const char* str);
  static const char* GetConsoleRegionName(ConsoleRegion region);
  static const char* GetConsoleRegionDisplayName(ConsoleRegion region);

  static std::optional<DiscRegion> ParseDiscRegionName(const char* str);
  static const char* GetDiscRegionName(DiscRegion region);
  static const char* GetDiscRegionDisplayName(DiscRegion region);

  static std::optional<CPUExecutionMode> ParseCPUExecutionMode(const char* str);
  static const char* GetCPUExecutionModeName(CPUExecutionMode mode);
  static const char* GetCPUExecutionModeDisplayName(CPUExecutionMode mode);

  static std::optional<CPUFastmemMode> ParseCPUFastmemMode(const char* str);
  static const char* GetCPUFastmemModeName(CPUFastmemMode mode);
  static const char* GetCPUFastmemModeDisplayName(CPUFastmemMode mode);

  static std::optional<GPURenderer> ParseRendererName(const char* str);
  static const char* GetRendererName(GPURenderer renderer);
  static const char* GetRendererDisplayName(GPURenderer renderer);
  static RenderAPI GetRenderAPIForRenderer(GPURenderer renderer);

  static std::optional<GPUTextureFilter> ParseTextureFilterName(const char* str);
  static const char* GetTextureFilterName(GPUTextureFilter filter);
  static const char* GetTextureFilterDisplayName(GPUTextureFilter filter);

  static std::optional<GPUDownsampleMode> ParseDownsampleModeName(const char* str);
  static const char* GetDownsampleModeName(GPUDownsampleMode mode);
  static const char* GetDownsampleModeDisplayName(GPUDownsampleMode mode);

  static std::optional<GPUWireframeMode> ParseGPUWireframeMode(const char* str);
  static const char* GetGPUWireframeModeName(GPUWireframeMode mode);
  static const char* GetGPUWireframeModeDisplayName(GPUWireframeMode mode);

  static std::optional<DisplayCropMode> ParseDisplayCropMode(const char* str);
  static const char* GetDisplayCropModeName(DisplayCropMode crop_mode);
  static const char* GetDisplayCropModeDisplayName(DisplayCropMode crop_mode);

  static std::optional<DisplayAspectRatio> ParseDisplayAspectRatio(const char* str);
  static const char* GetDisplayAspectRatioName(DisplayAspectRatio ar);
  static const char* GetDisplayAspectRatioDisplayName(DisplayAspectRatio ar);

  static std::optional<DisplayAlignment> ParseDisplayAlignment(const char* str);
  static const char* GetDisplayAlignmentName(DisplayAlignment alignment);
  static const char* GetDisplayAlignmentDisplayName(DisplayAlignment alignment);

  static std::optional<DisplayScalingMode> ParseDisplayScaling(const char* str);
  static const char* GetDisplayScalingName(DisplayScalingMode mode);
  static const char* GetDisplayScalingDisplayName(DisplayScalingMode mode);

  static std::optional<AudioBackend> ParseAudioBackend(const char* str);
  static const char* GetAudioBackendName(AudioBackend backend);
  static const char* GetAudioBackendDisplayName(AudioBackend backend);

  static std::optional<ControllerType> ParseControllerTypeName(const char* str);
  static const char* GetControllerTypeName(ControllerType type);
  static const char* GetControllerTypeDisplayName(ControllerType type);

  static std::optional<MemoryCardType> ParseMemoryCardTypeName(const char* str);
  static const char* GetMemoryCardTypeName(MemoryCardType type);
  static const char* GetMemoryCardTypeDisplayName(MemoryCardType type);

  static std::optional<MultitapMode> ParseMultitapModeName(const char* str);
  static const char* GetMultitapModeName(MultitapMode mode);
  static const char* GetMultitapModeDisplayName(MultitapMode mode);

  static std::optional<CDROMMechaconVersion> ParseCDROMMechVersionName(const char* str);
  static const char* GetCDROMMechVersionName(CDROMMechaconVersion mode);
  static const char* GetCDROMMechVersionDisplayName(CDROMMechaconVersion mode);

  static constexpr GPURenderer DEFAULT_GPU_RENDERER = GPURenderer::Automatic;
  static constexpr GPUTextureFilter DEFAULT_GPU_TEXTURE_FILTER = GPUTextureFilter::Nearest;
  static constexpr GPUDownsampleMode DEFAULT_GPU_DOWNSAMPLE_MODE = GPUDownsampleMode::Disabled;
  static constexpr GPUWireframeMode DEFAULT_GPU_WIREFRAME_MODE = GPUWireframeMode::Disabled;
  static constexpr ConsoleRegion DEFAULT_CONSOLE_REGION = ConsoleRegion::Auto;
  static constexpr float DEFAULT_GPU_PGXP_DEPTH_THRESHOLD = 300.0f;
  static constexpr float GPU_PGXP_DEPTH_THRESHOLD_SCALE = 4096.0f;

#if defined(ENABLE_RECOMPILER)
  static constexpr CPUExecutionMode DEFAULT_CPU_EXECUTION_MODE = CPUExecutionMode::Recompiler;

  // LUT still ends up faster on Apple Silicon for now, because of 16K pages.
#if defined(ENABLE_MMAP_FASTMEM) && (!defined(__APPLE__) || !defined(__aarch64__))
  static constexpr CPUFastmemMode DEFAULT_CPU_FASTMEM_MODE = CPUFastmemMode::MMap;
#else
  static constexpr CPUFastmemMode DEFAULT_CPU_FASTMEM_MODE = CPUFastmemMode::LUT;
#endif
#elif defined(ENABLE_NEWREC)
  static constexpr CPUExecutionMode DEFAULT_CPU_EXECUTION_MODE = CPUExecutionMode::NewRec;
  static constexpr CPUFastmemMode DEFAULT_CPU_FASTMEM_MODE = CPUFastmemMode::MMap;
#else
  static constexpr CPUExecutionMode DEFAULT_CPU_EXECUTION_MODE = CPUExecutionMode::CachedInterpreter;
  static constexpr CPUFastmemMode DEFAULT_CPU_FASTMEM_MODE = CPUFastmemMode::Disabled;
#endif

#if defined(ENABLE_CUBEB)
  static constexpr AudioBackend DEFAULT_AUDIO_BACKEND = AudioBackend::Cubeb;
#elif defined(_WIN32)
  static constexpr AudioBackend DEFAULT_AUDIO_BACKEND = AudioBackend::XAudio2;
#elif defined(__ANDROID__)
  static constexpr AudioBackend DEFAULT_AUDIO_BACKEND = AudioBackend::AAudio;
#else
  static constexpr AudioBackend DEFAULT_AUDIO_BACKEND = AudioBackend::Null;
#endif

  static constexpr DisplayCropMode DEFAULT_DISPLAY_CROP_MODE = DisplayCropMode::Overscan;
  static constexpr DisplayAspectRatio DEFAULT_DISPLAY_ASPECT_RATIO = DisplayAspectRatio::Auto;
  static constexpr DisplayAlignment DEFAULT_DISPLAY_ALIGNMENT = DisplayAlignment::Center;
  static constexpr DisplayScalingMode DEFAULT_DISPLAY_SCALING = DisplayScalingMode::BilinearSmooth;
  static constexpr float DEFAULT_OSD_SCALE = 100.0f;

  static constexpr u8 DEFAULT_CDROM_READAHEAD_SECTORS = 8;
  static constexpr CDROMMechaconVersion DEFAULT_CDROM_MECHACON_VERSION = CDROMMechaconVersion::VC1A;

  static constexpr ControllerType DEFAULT_CONTROLLER_1_TYPE = ControllerType::AnalogController;
  static constexpr ControllerType DEFAULT_CONTROLLER_2_TYPE = ControllerType::None;
  static constexpr MemoryCardType DEFAULT_MEMORY_CARD_1_TYPE = MemoryCardType::PerGameTitle;
  static constexpr MemoryCardType DEFAULT_MEMORY_CARD_2_TYPE = MemoryCardType::None;
  static constexpr MultitapMode DEFAULT_MULTITAP_MODE = MultitapMode::Disabled;

  static constexpr s32 DEFAULT_ACHIEVEMENT_NOTIFICATION_TIME = 5;
  static constexpr s32 DEFAULT_LEADERBOARD_NOTIFICATION_TIME = 10;

  static constexpr LOGLEVEL DEFAULT_LOG_LEVEL = LOGLEVEL_INFO;

#ifndef __ANDROID__
  static constexpr u32 DEFAULT_AUDIO_BUFFER_MS = 50;
  static constexpr u32 DEFAULT_AUDIO_OUTPUT_LATENCY_MS = 20;
#else
  static constexpr u32 DEFAULT_AUDIO_BUFFER_MS = 100;
  static constexpr u32 DEFAULT_AUDIO_OUTPUT_LATENCY_MS = 20;
#endif
  static constexpr AudioStretchMode DEFAULT_AUDIO_STRETCH_MODE = AudioStretchMode::TimeStretch;

  // Enable console logging by default on Linux platforms.
#if defined(__linux__) && !defined(__ANDROID__)
  static constexpr bool DEFAULT_LOG_TO_CONSOLE = true;
#else
  static constexpr bool DEFAULT_LOG_TO_CONSOLE = false;
#endif

  // Android doesn't create settings until they're first opened, so we have to override the defaults here.
#ifndef __ANDROID__
  static constexpr bool DEFAULT_SAVE_STATE_COMPRESSION = true;
  static constexpr bool DEFAULT_SAVE_STATE_BACKUPS = true;
  static constexpr bool DEFAULT_VSYNC_VALUE = false;
  static constexpr bool DEFAULT_FAST_BOOT_VALUE = false;
  static constexpr float DEFAULT_DISPLAY_MAX_FPS = 0.0f;
#else
  static constexpr bool DEFAULT_SAVE_STATE_COMPRESSION = true;
  static constexpr bool DEFAULT_SAVE_STATE_BACKUPS = false;
  static constexpr bool DEFAULT_VSYNC_VALUE = false;
  static constexpr bool DEFAULT_FAST_BOOT_VALUE = true;
  static constexpr float DEFAULT_DISPLAY_MAX_FPS = 60.0f;
#endif
};

extern Settings g_settings;

namespace EmuFolders {
extern std::string AppRoot;
extern std::string DataRoot;
extern std::string Bios;
extern std::string Cache;
extern std::string Cheats;
extern std::string Covers;
extern std::string Dumps;
extern std::string GameSettings;
extern std::string InputProfiles;
extern std::string MemoryCards;
extern std::string Resources;
extern std::string SaveStates;
extern std::string Screenshots;
extern std::string Shaders;
extern std::string Textures;

// Assumes that AppRoot and DataRoot have been initialized.
void SetDefaults();
bool EnsureFoldersExist();
void LoadConfig(SettingsInterface& si);
void Save(SettingsInterface& si);

/// Updates the variables in the EmuFolders namespace, reloading subsystems if needed.
void Update();
} // namespace EmuFolders