N64 Rom autoload (#150)

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## Description
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Allows the ability to autoload a specified ROM instead of the menu,
taking into account the ROM database.
If enabled, you can currently fallback to the menu by holding joypad
start on console reset.


## Motivation and Context
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<!--- If it fixes/closes/resolves an open issue, please link to the
issue here -->
This is a better implementation of #140.

## How Has This Been Tested?
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## Screenshots
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## Types of changes
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the boxes that apply: -->
- [x] Improvement (non-breaking change that adds a new feature)
- [ ] Bug fix (fixes an issue)
- [ ] Breaking change (breaking change)
- [ ] Documentation Improvement
- [ ] Config and build (change in the configuration and build system,
has no impact on code or features)

## Checklist:
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that apply. -->
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- [ ] My code follows the code style of this project.
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.

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Signed-off-by: GITHUB_USER <GITHUB_USER_EMAIL>


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

- **New Features**
- Introduced ROM autoloading functionality, allowing users to enable
automatic loading of ROMs with specified paths and filenames.
- Added a settings option for managing ROM autoload preferences in the
menu.

- **User Interface Enhancements**
- Updated settings menu to display the state of the "Autoload ROM"
setting.
  - Improved context menus for toggling various settings.

- **Bug Fixes**
- Enhanced memory management by ensuring proper resource deallocation
for settings.

- **Documentation**
- Added documentation for new functions and settings related to ROM
autoloading.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

README.md

@@ -26,6 +26,7 @@ An open source menu for N64 flashcarts.
 * Real Time Clock support.
 * Music playback (MP3).
 * Menu sound effects.
+* N64 ROM autoload.
 
 
 ## Documentation
@@ -49,6 +50,9 @@ An open source menu for N64 flashcarts.
 ## Experimental features
 These features are subject to change:
 
+### N64 ROM autoload
+To use the autoload function, while on the `N64 ROM information` display, press the `R` button on your joypad and select the `Set ROM to autoload` option. When you restart the console, it will now only load the selected ROM rather than the menu.
+NOTE: to return to the menu, hold joypad `start` button whilst powering on the console. 
 
 ### GamePak sprites
 To use N64 `GamePak` sprites, place `PNG` files within the `sd:/menu/boxart/` folder.

src/menu/settings.c

@@ -14,6 +14,9 @@ static settings_t init = {
     .default_directory = "/",
     .use_saves_folder = true,
     .sound_enabled = true,
+    .rom_autoload_enabled = false,
+    .rom_autoload_path = "",
+    .rom_autoload_filename = "",
     
     /* Beta feature flags (should always init to off) */
     .bgm_enabled = false,
@@ -41,6 +44,10 @@ void settings_load (settings_t *settings) {
     settings->use_saves_folder = mini_get_bool(ini, "menu", "use_saves_folder", init.use_saves_folder);
     settings->sound_enabled = mini_get_bool(ini, "menu", "sound_enabled", init.sound_enabled);
 
+    settings->rom_autoload_enabled = mini_get_bool(ini, "menu", "autoload_rom_enabled", init.rom_autoload_enabled);
+    settings->rom_autoload_path = strdup(mini_get_string(ini, "autoload", "rom_path", init.rom_autoload_path));
+    settings->rom_autoload_filename = strdup(mini_get_string(ini, "autoload", "rom_filename", init.rom_autoload_filename));
+
     /* Beta feature flags, they might not be in the file */
     settings->bgm_enabled = mini_get_bool(ini, "menu_beta_flag", "bgm_enabled", init.bgm_enabled);
     settings->rumble_enabled = mini_get_bool(ini, "menu_beta_flag", "rumble_enabled", init.rumble_enabled);
@@ -56,6 +63,9 @@ void settings_save (settings_t *settings) {
     mini_set_string(ini, "menu", "default_directory", settings->default_directory);
     mini_set_bool(ini, "menu", "use_saves_folder", settings->use_saves_folder);
     mini_set_bool(ini, "menu", "sound_enabled", settings->sound_enabled);
+    mini_set_bool(ini, "menu", "autoload_rom_enabled", settings->rom_autoload_enabled);
+    mini_set_string(ini, "autoload", "rom_path", settings->rom_autoload_path);
+    mini_set_string(ini, "autoload", "rom_filename", settings->rom_autoload_filename);
 
     /* Beta feature flags, they should not save until production ready! */
     // mini_set_bool(ini, "menu_beta_flag", "bgm_enabled", settings->bgm_enabled);

src/menu/settings.h

@@ -30,6 +30,16 @@ typedef struct {
 
     /** @brief Enable rumble feedback */
     bool rumble_enabled;
+
+    /** @brief Enable the ability to bypass the menu and instantly load a ROM */
+    bool rom_autoload_enabled;
+
+    /** @brief A path to the autoloaded ROM */
+    char *rom_autoload_path;
+
+    /** @brief A filename of the autoloaded ROM */
+    char *rom_autoload_filename;
+
 } settings_t;
 
 
@@ -40,5 +50,4 @@ void settings_load (settings_t *settings);
 /** @brief The settings to save */
 void settings_save (settings_t *settings);
 
-
 #endif

src/menu/views/load_rom.c

@@ -3,6 +3,8 @@
 #include "boot/boot.h"
 #include "../sound.h"
 #include "views.h"
+#include <string.h>
+#include "utils/fs.h"
 
 static bool show_extra_info_message = false;
 static component_boxart_t *boxart;
@@ -143,6 +145,17 @@ static void set_tv_type (menu_t *menu, void *arg) {
     menu->browser.reload = true;
 }
 
+static void set_autoload_type (menu_t *menu, void *arg) {
+    free(menu->settings.rom_autoload_path);
+    menu->settings.rom_autoload_path = strdup(strip_fs_prefix(path_get(menu->browser.directory)));
+    free(menu->settings.rom_autoload_filename);
+    menu->settings.rom_autoload_filename = strdup(menu->browser.entry->name);
+    // FIXME: add a confirmation box here! (press start on reboot)
+    menu->settings.rom_autoload_enabled = true;
+    settings_save(&menu->settings);
+    menu->browser.reload = true;
+}
+
 static component_context_menu_t set_cic_type_context_menu = { .list = {
     {.text = "Automatic", .action = set_cic_type, .arg = (void *) (ROM_CIC_TYPE_AUTOMATIC) },
     {.text = "CIC-6101", .action = set_cic_type, .arg = (void *) (ROM_CIC_TYPE_6101) },
@@ -185,6 +198,7 @@ static component_context_menu_t options_context_menu = { .list = {
     { .text = "Set CIC Type", .submenu = &set_cic_type_context_menu },
     { .text = "Set Save Type", .submenu = &set_save_type_context_menu },
     { .text = "Set TV Type", .submenu = &set_tv_type_context_menu },
+    { .text = "Set ROM to autoload", .action = set_autoload_type },
     COMPONENT_CONTEXT_MENU_LIST_END,
 }};
 
@@ -340,13 +354,13 @@ static void deinit (void) {
 
 
 void view_load_rom_init (menu_t *menu) {
-    menu->boot_pending.rom_file = false;
-
+    if (!menu->settings.rom_autoload_enabled) {
         if (menu->load.rom_path) {
             path_free(menu->load.rom_path);
         }
 
         menu->load.rom_path = path_clone_push(menu->browser.directory, menu->browser.entry->name);
+    }
 
     rom_err_t err = rom_info_load(menu->load.rom_path, &menu->load.rom_info);
     if (err != ROM_OK) {
@@ -356,10 +370,11 @@ void view_load_rom_init (menu_t *menu) {
         return;
     }
 
+    if (!menu->settings.rom_autoload_enabled) {
         boxart = component_boxart_init(menu->storage_prefix, menu->load.rom_info.game_code, IMAGE_BOXART_FRONT);
-
         component_context_menu_init(&options_context_menu);
     }
+}
 
 void view_load_rom_display (menu_t *menu, surface_t *display) {
     process(menu);

src/menu/views/settings_editor.c

@@ -136,6 +136,7 @@ static void draw (menu_t *menu, surface_t *d) {
         ALIGN_LEFT, VALIGN_TOP,
         "\n\n"
         "  Default Directory : %s\n\n"
+        "  Autoload ROM      : %s\n"
         "To change the following menu settings, press 'A':\n"
         "*    PAL60 Mode        : %s\n"
         "     Show Hidden Files : %s\n"
@@ -149,6 +150,7 @@ static void draw (menu_t *menu, surface_t *d) {
         "Note: Certain settings have the following caveats:\n"
         "*    Requires rebooting the N64 Console.\n",
         menu->settings.default_directory,
+        format_switch(menu->settings.rom_autoload_enabled),
         format_switch(menu->settings.pal60_enabled),
         format_switch(menu->settings.show_protected_entries),
         format_switch(menu->settings.use_saves_folder),

src/menu/views/startup.c

@@ -9,6 +9,27 @@ static void draw (menu_t *menu, surface_t *d) {
 
 
 void view_startup_init (menu_t *menu) {
+    // FIXME: rather than use a controller button, would it be better to use the cart button?
+    JOYPAD_PORT_FOREACH (port) {
+        joypad_poll();
+        joypad_buttons_t b_held = joypad_get_buttons_held(port);
+
+        if (menu->settings.rom_autoload_enabled && b_held.start) {
+            menu->settings.rom_autoload_enabled = false;
+            menu->settings.rom_autoload_path = "";
+            menu->settings.rom_autoload_filename = "";
+            settings_save(&menu->settings);
+        }
+    }
+    if (menu->settings.rom_autoload_enabled) {
+        menu->browser.directory = path_init(menu->storage_prefix, menu->settings.rom_autoload_path);
+        menu->load.rom_path = path_clone_push(menu->browser.directory, menu->settings.rom_autoload_filename);
+        menu->boot_pending.rom_file = true;
+        menu->next_mode = MENU_MODE_LOAD_ROM;
+
+        return;
+    }
+    
     menu->next_mode = MENU_MODE_BROWSER;
 }