Load menu and level audio dynamically

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

packages/wolf_3d_data/lib/src/wl_parser.dart

@@ -4,6 +4,20 @@ import 'dart:typed_data';
 import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 
 abstract class WLParser {
+  // --- Original Song Lookup Tables ---
+  static const List<int> _sharewareMusicMap = [
+    2, 3, 4, 5, 2, 3, 4, 5, 6, 7, // Episode 1
+  ];
+
+  static const List<int> _retailMusicMap = [
+    2, 3, 4, 5, 2, 3, 4, 5, 6, 7, // Ep 1
+    8, 9, 10, 11, 8, 9, 11, 10, 6, 12, // Ep 2
+    13, 14, 15, 16, 13, 14, 15, 16, 17, 18, // Ep 3
+    2, 3, 4, 5, 2, 3, 4, 5, 6, 7, // Ep 4
+    8, 9, 10, 11, 8, 9, 11, 10, 6, 12, // Ep 5
+    13, 14, 15, 16, 13, 14, 15, 16, 17, 19, // Ep 6
+  ];
+
   /// Asynchronously discovers the game version and loads all necessary files.
   /// Provide a [fileFetcher] callback (e.g., Flutter's rootBundle.load) that
   /// takes a filename and returns its ByteData.
@@ -229,6 +243,10 @@ abstract class WLParser {
     bool isShareware = true,
   }) {
     List<WolfLevel> levels = [];
+
+    // 1. Select the correct map based on the version
+    final activeMusicMap = isShareware ? _sharewareMusicMap : _retailMusicMap;
+
     int rlewTag = mapHead.getUint16(0, Endian.little);
 
     for (int i = 0; i < 100; i++) {
@@ -279,11 +297,20 @@ abstract class WLParser {
         objectGrid.add(objectRow);
       }
 
+      // Determine music track index.
+      // We use 'i' because it represents the absolute map slot (e.g. Map 12).
+      // If a map exists past the bounds of our lookup table (custom maps),
+      // we wrap around safely.
+      int trackIndex = (i < activeMusicMap.length)
+          ? activeMusicMap[i]
+          : activeMusicMap[i % activeMusicMap.length];
+
       levels.add(
         WolfLevel(
           name: name,
           wallGrid: wallGrid,
           objectGrid: objectGrid,
+          musicIndex: trackIndex,
         ),
       );
     }