/// <summary>
/// Reads a text entry of a Subtitle Packet from a Stream.
/// </summary>
/// <param name="Reader">The reader of the Stream where the data is located</param>
/// <param name="Game">The game being tampered</param>
/// <returns>The entry as a object</returns>
public static SubtitlePacketText FromStream(EndianBinaryReader Reader, MGSGame Game)
{
SubtitlePacketText PacketText = new SubtitlePacketText();
PacketText.StartTime = Reader.ReadUInt32();
PacketText.EndTime = Reader.ReadUInt32();
uint Dummy = Reader.ReadUInt32();
ushort TextLength = Reader.ReadUInt16();
PacketText.LanguageId = Reader.ReadUInt16();
byte[] TextBuffer = new byte[TextLength - 0x10];
Reader.Read(TextBuffer, 0, TextBuffer.Length);
PacketText.Text = MGSText.Buffer2Text(Unpad(TextBuffer), Game);
PacketText.Text = PacketText.Text.Replace(Environment.NewLine, "\\n");
return(PacketText);
}
/// <summary>
/// Extracts the texts and other data inside the codec.dat file from MGS.
/// </summary>
/// <param name="Data">The Stream with the data to be extracted</param>
/// <param name="OutputFolder">The output folder where the extracted data will be placed</param>
public static void Extract(Stream Data, string OutputFolder, MGSGame Game)
{
if (Game == MGSGame.MGS3)
{
MGSText.Initialize();
}
BinaryReader Reader = new BinaryReader(Data);
List <uint> AddressTable = new List <uint>();
uint Delimiter = Reader.ReadUInt32();
Data.Seek(0, SeekOrigin.Begin);
while (Data.Position < Data.Length)
{
uint Position = (uint)Data.Position;
uint Value = Reader.ReadUInt32();
if (Value == Delimiter)
{
AddressTable.Add(Position);
}
}
AddressTable.Add((uint)Data.Length);
for (int Index = 0; Index < AddressTable.Count - 1; Index++)
{
string OutputPath = Path.Combine(OutputFolder, string.Format("Text_{0:D5}", Index));
if (!Directory.Exists(OutputPath))
{
Directory.CreateDirectory(OutputPath);
}
uint HeaderLength = 0;
Data.Seek(AddressTable[Index], SeekOrigin.Begin);
while (Reader.ReadInt32() != -1)
{
HeaderLength += 4;
}
uint BaseOffset = (uint)Data.Position;
uint ScriptOffset = Reader.ReadUInt32() + BaseOffset;
uint DialogsTableOffset = Reader.ReadUInt32() + BaseOffset;
uint DialogsTextOffset = Reader.ReadUInt32() + BaseOffset;
uint ScriptHeaderOffset = Reader.ReadUInt32() + BaseOffset;
uint Key = Reader.ReadUInt32();
//Read header (with script pointers)
Data.Seek(AddressTable[Index], SeekOrigin.Begin);
byte[] Header = new byte[HeaderLength];
Reader.Read(Header, 0, Header.Length);
MGSCrypto Crypto = new MGSCrypto(Key);
StringBuilder Text = new StringBuilder();
//Read texts
if (DialogsTableOffset != DialogsTextOffset)
{
int TextIndex = 0;
bool HasText = true;
while (HasText)
{
Data.Seek(DialogsTableOffset + TextIndex++ *4, SeekOrigin.Begin);
uint Offset = (Reader.ReadUInt32() & 0x7fffffff) + DialogsTextOffset;
uint NextOffset = (Reader.ReadUInt32() & 0x7fffffff) + DialogsTextOffset;
if (Data.Position > DialogsTextOffset)
{
NextOffset = ScriptHeaderOffset;
HasText = false;
}
Data.Seek(Offset, SeekOrigin.Begin);
byte[] TextBuffer = new byte[NextOffset - Offset];
Reader.Read(TextBuffer, 0, TextBuffer.Length);
TextBuffer = UnpadText(Crypto.ProcessBuffer(TextBuffer));
Text.Append(MGSText.Buffer2Text(TextBuffer, Game));
Text.Append(TextSeparator);
}
}
if (Game == MGSGame.MGS3)
{
//This is probably not a header, but I don't know what this data is, so...
string ScriptHeaderFile = Path.Combine(OutputPath, "ScriptHeader.bin");
Data.Seek(ScriptHeaderOffset, SeekOrigin.Begin);
uint ScriptHeaderLength = ScriptOffset - ScriptHeaderOffset;
byte[] ScriptHeader = new byte[ScriptHeaderLength];
Reader.Read(ScriptHeader, 0, ScriptHeader.Length);
File.WriteAllBytes(ScriptHeaderFile, ScriptHeader);
}
//Read script
Data.Seek(ScriptOffset, SeekOrigin.Begin);
uint ScriptLength = AddressTable[Index + 1] - ScriptOffset;
byte[] Script = new byte[ScriptLength];
Reader.Read(Script, 0, Script.Length);
string HeaderFile = Path.Combine(OutputPath, "Header.bin");
string TextFile = Path.Combine(OutputPath, "Text.txt");
string ScriptFile = Path.Combine(OutputPath, "Script.bin");
File.WriteAllBytes(HeaderFile, Header);
File.WriteAllText(TextFile, Text.ToString());
File.WriteAllBytes(ScriptFile, Script);
if (OnStatusChanged != null)
{
float Percentage = (float)(Index + 1) / (AddressTable.Count - 1);
OnStatusChanged(Percentage);
}
}
}
