fix decompress #150

Author: UlyssesWu

FreeMote.PsBuild/PsbDecompiler.cs

@@ -586,7 +586,7 @@ public static void ExtractArchive(string filePath, string key, Dictionary<string
                     var fileLength = new FileInfo(body).Length;
                     using var mmFile =
                         MemoryMappedFile.CreateFromFile(body, FileMode.Open, name, 0, MemoryMappedFileAccess.Read);
-                    Parallel.ForEach(dic.OrderByDescending(kv => PsbExtension.ArchiveInfo_GetLengthFromRangeList((PsbList) kv.Value, archiveInfoType)), new ParallelOptions { MaxDegreeOfParallelism = 4}, pair => //Math.Max(Environment.ProcessorCount / 2, 2)
+                    Parallel.ForEach(dic.OrderByDescending(kv => PsbExtension.ArchiveInfo_GetLengthFromRangeList((PsbList) kv.Value, archiveInfoType)), new ParallelOptions { MaxDegreeOfParallelism = Math.Max(Environment.ProcessorCount / 2, 2) }, pair => //Math.Max(Environment.ProcessorCount / 2, 2)
                     {
                         //Console.WriteLine($"{(extractAll ? "Decompiling" : "Extracting")} {pair.Key} ...");
                         var range = (PsbList) pair.Value;

FreeMote.Psb/Plugins/MdfShell.cs

@@ -108,7 +108,7 @@ public static void ToPsb(Stream stream, byte[] outBuffer, Dictionary<string, obj
                 toBeDecompressedStream.Position = pos;
             }
 
-            toBeDecompressedStream.Seek(10, SeekOrigin.Current);
+            toBeDecompressedStream.Seek(10, SeekOrigin.Begin);
             ZlibCompress.Decompress(toBeDecompressedStream, outBuffer);
             if (encoded)
             {