macosx: disk open: do a shallow instead of a deep search for media directories

(cherry picked from commit d86de10ce6a52c523dc33848b4f36fe22b5a7bb6)
Signed-off-by: David Fuhrmann <david.fuhrmann@googlemail.com>

modules/gui/macosx/open.m

@@ -767,21 +767,41 @@ static VLCOpen *_o_sharedMainInstance = nil;
             {
                 // NSFileManager is not thread-safe, don't use defaultManager outside of the main thread
                 NSFileManager * fm = [[NSFileManager alloc] init];
-                NSArray * topLevelItems;
-                topLevelItems = [fm subpathsOfDirectoryAtPath: mountPath error: NULL];
-                [fm release];
 
-                NSUInteger itemCount = [topLevelItems count];
-                for (int i = 0; i < itemCount; i++) {
-                    if([[topLevelItems objectAtIndex:i] rangeOfString:@"SVCD"].location != NSNotFound) {
+                NSArray *dirContents = [fm contentsOfDirectoryAtPath:mountPath error:nil];
+                for (int i = 0; i < [dirContents count]; i++)
+                {
+                    NSString *currentFile = [dirContents objectAtIndex:i];
+                    NSString *fullPath = [mountPath stringByAppendingPathComponent:currentFile];
+
+                    BOOL isDir;
+                    if ([fm fileExistsAtPath:fullPath isDirectory:&isDir] && isDir)
+                    {                        
+                        if ([currentFile caseInsensitiveCompare:@"SVCD"] == NSOrderedSame)
+                        {
                             returnValue = kVLCMediaSVCD;
                             break;
                         }
-                    if([[topLevelItems objectAtIndex:i] rangeOfString:@"VCD"].location != NSNotFound) {
+                        if ([currentFile caseInsensitiveCompare:@"VCD"] == NSOrderedSame)
+                        {
                             returnValue = kVLCMediaVCD;
                             break;
                         }
+                        if ([currentFile caseInsensitiveCompare:@"BDMV"] == NSOrderedSame)
+                        {
+                            returnValue = kVLCMediaBDMVFolder;
+                            break;
+                        }
+                        if ([currentFile caseInsensitiveCompare:@"VIDEO_TS"] == NSOrderedSame)
+                        {
+                            returnValue = kVLCMediaVideoTSFolder;
+                            break;
+                        }
                     }
+                }
+
+                [fm release];
+
                 if(!returnValue)
                     returnValue = kVLCMediaVideoTSFolder;
             }