MWL Music

private void SetMWLMusic(string path, byte music)
        {

            int o, o2, o3, o4;
            int obj, ext;

            BinaryReader reader = new BinaryReader(File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Write));
            BinaryWriter writer = new BinaryWriter(File.Open(path, FileMode.Open, FileAccess.Write, FileShare.Read));

            try
            {
                reader.BaseStream.Seek(4, SeekOrigin.Begin);
                o = reader.ReadInt32() + 8;
                reader.BaseStream.Seek(o, SeekOrigin.Begin);
                o = reader.ReadInt32() + 5 + 8;
                reader.BaseStream.Seek(o, SeekOrigin.Begin);

                while (true)
                {
                    o = reader.ReadByte();
                    if (o == 0xFF)
                    {
                        reader.Close();
                        writer.Close();
                        return;
                    }

                    o2 = reader.ReadByte();
                    o3 = reader.ReadByte();

                    obj = (o & 0x60) / 2 | (o2 & 0xF0) / 16;

                    if (obj == 0)
                    {
                        ext = o3;
                        if (ext == 0)
                        {
                            o4 = reader.ReadByte();
                        }
                        if (ext == 2)
                        {
                            o4 = reader.ReadByte();
                            o4 = reader.ReadByte();
                        }
                    }
                    else
                    {
                        switch (obj)
                        {
                            case 0x22:
                            case 0x23:
                                o4 = reader.ReadByte();
                                break;
                            case 0x26:
                                long off = reader.BaseStream.Position - 1;
                                writer.Seek((int)(off), SeekOrigin.Begin);
                                writer.Write((byte)(music+1));

                                reader.Close();
                                writer.Close();
                                return;
                            case 0x27:
                            case 0x29:
                                o4 = reader.ReadByte();
                                o4 &= 0xC0;

                                switch (o4)
                                {
                                    case 0x00:
                                    case 0x40:
                                        o4 = reader.ReadByte();
                                        break;
                                    case 0x80:
                                        o4 = reader.ReadByte();
                                        o4 = reader.ReadByte();
                                        break;
                                    case 0xC0:
                                        o4 = reader.ReadByte();
                                        o4 = reader.ReadByte();
                                        o4 = reader.ReadByte();
                                        break;
                                }

                                break;
                            case 0x2D:
                                o4 = reader.ReadByte();
                                o4 = reader.ReadByte();
                                break;
                        }
                    }
                }
            }
            catch (Exception e)
            {

            }
            reader.Close();
            writer.Close();

            return;
        }