From 0ccd8462c59e9ecb42c64e262dc4de0546e5b0ca Mon Sep 17 00:00:00 2001
From: Eduo Gutierrez <eduardo.gutierrez@dllgroup.com>
Date: Mon, 3 Nov 2025 01:31:46 +0100
Subject: [PATCH] Add support for MT32 ROMs provided in GameBox

Adds support for a folder named "MT-32 ROMs" in the gamebox
root containing valid MT-32 ROMs.

Code will first check the Application Support folder in the user's
Library and if not present will check for this location in the
gamebox root folder. If present, game will behave normally
and show MT-32 LCD texts.

This doesn't affect the display in the Application's settings.
---
 Boxer/BXSession+BXAudioControls.m | 52 +++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/Boxer/BXSession+BXAudioControls.m b/Boxer/BXSession+BXAudioControls.m
index 8f9e5a42..cfaea36e 100644
--- a/Boxer/BXSession+BXAudioControls.m
+++ b/Boxer/BXSession+BXAudioControls.m
@@ -17,6 +17,7 @@
 #import "BXExternalMIDIDevice.h"
 #import "BXExternalMT32.h"
 #import "Boxer-Swift.h"
+#import "RegexKitLite.h"
 
 
 @implementation BXSession (BXAudioControls)
@@ -122,6 +123,13 @@ - (void) emulatorDidDisplayMT32Message: (NSNotification *)notification
         NSError *emulatedMT32Error = nil;
         NSURL *PCMROMURL        = [(BXBaseAppController *)[NSApp delegate] MT32PCMROMURL];
         NSURL *controlROMURL    = [(BXBaseAppController *)[NSApp delegate] MT32ControlROMURL];
+
+        //Fallback: check gamebox for ROMs if not found in Application Support
+        if (!PCMROMURL && self.gamebox)
+            PCMROMURL = [self _MT32PCMROMURLInGamebox];
+        if (!controlROMURL && self.gamebox)
+            controlROMURL = [self _MT32ControlROMURLInGamebox];
+
         BXEmulatedMT32 *emulatedMT32 = [[BXEmulatedMT32 alloc] initWithPCMROM: PCMROMURL
                                                                     controlROM: controlROMURL
                                                                       delegate: theEmulator
@@ -241,4 +249,48 @@ - (BOOL) emulator: (BXEmulator *)theEmulator shouldWaitForMIDIDevice: (id <BXMID
         return NO;
     }
 }
+
+#pragma mark -
+#pragma mark MT-32 ROM support (gamebox fallback)
+
+- (NSURL *) _MT32ROMURLInGameboxMatchingPattern: (NSString *)pattern
+{
+    if (!self.gamebox || !self.fileURL)
+        return nil;
+
+    NSURL *romsDir = [self.fileURL URLByAppendingPathComponent: @"MT-32 ROMs"];
+
+    if (![romsDir checkResourceIsReachableAndReturnError: NULL])
+        return nil;
+
+    NSDirectoryEnumerationOptions options = NSDirectoryEnumerationSkipsHiddenFiles | NSDirectoryEnumerationSkipsSubdirectoryDescendants;
+    NSDirectoryEnumerator *enumerator = [[NSFileManager defaultManager] enumeratorAtURL: romsDir
+                                                             includingPropertiesForKeys: nil
+                                                                                options: options
+                                                                           errorHandler: NULL];
+
+    for (NSURL *URL in enumerator)
+    {
+        NSString *fileName = URL.lastPathComponent;
+        if ([fileName isMatchedByRegex: pattern
+                               options: RKLCaseless
+                               inRange: NSMakeRange(0, fileName.length)
+                                 error: nil])
+        {
+            return URL;
+        }
+    }
+    return nil;
+}
+
+- (NSURL *) _MT32ControlROMURLInGamebox
+{
+    return [self _MT32ROMURLInGameboxMatchingPattern: @"control"];
+}
+
+- (NSURL *) _MT32PCMROMURLInGamebox
+{
+    return [self _MT32ROMURLInGameboxMatchingPattern: @"pcm"];
+}
+
 @end