/// <summary>
/// Determine if the VOL file is of type TOC 2.2, TOC 3.1 or GTPSP (others aren't supported).
/// </summary>
/// <param name="stream">Stream containing the VOL file.</param>
/// <returns>FileType</returns>
private FileType GetVOLType(Stream stream)
{
var fileType = FileType.UNKNOWN;
using (var reader = new EndianBinReader(stream, EndianType.BIG_ENDIAN)) {
if (reader.BaseStream.Length - reader.BaseStream.Position < 0x08)
{
throw new ArgumentException("Invalid VOL file.");
}
var magic = reader.ReadUInt64();
if (magic == TOC22_MAGIC)
{
fileType = FileType.TOC22_VOL;
if (TOC31Offset(reader) > -1)
{
fileType = FileType.TOC31_VOL;
}
}
else if (magic == TOCPSP_MAGIC)
{
fileType = FileType.GTPSP_VOL;
}
}
return(fileType);
}
public RT04Header(EndianBinReader reader)
{
reader.BaseStream.Position = 0;
if ((Magic = reader.ReadUInt32(EndianType.BIG_ENDIAN)) != Constants.RT04_MAGIC)
{
throw new Exception("Invalid magic, doesn't match RT04.");
}
Padding = reader.ReadUInt64();
EntryCount = reader.ReadUInt32();
}
public bool Read(EndianBinReader reader)
{
if ((Magic = reader.ReadUInt32()) != Consts.kVOLUME_HEADER_MAGIC)
{
return(false);
}
Seed = reader.ReadUInt32();
if (Seed <= 0)
{
return(false);
}
Size = reader.ReadUInt32();
RealSize = reader.ReadUInt32();
PatchSequence = reader.ReadUInt64();
FileSize = reader.ReadUInt64();
var buffer = reader.ReadBytes(128);
TitleID = Encoding.UTF8.GetString(buffer);
return(true);
}
/// <summary>
/// Search for the TOC 3.1 in the VOL file and return its offset if found
/// </summary>
private long TOC31Offset(EndianBinReader reader)
{
for (int i = 0; i < Math.Min((reader.BaseStream.Length / 0x800), 10000); i++)
{
reader.BaseStream.Seek(i * 0x800, SeekOrigin.Begin);
ulong magic = reader.ReadUInt64();
if (magic == TOC31_MAGIC_ENCRYPTED || magic - TOC31_MAGIC == 0)
{
return(i * 0x800);
}
}
return(-1);
}
