/// <inheritdoc/>
public string GetInternalName(Stream romStream)
{
CdiDreamcastDisc disc = new CdiDreamcastDisc(new DiscJugglerDisc(romStream));
return(disc.GetMeta().Substring(0x80, 0x7f).Trim());
/*
* header = 0x0 SEGA SEGAKATANA for 0x10 bytes (0xF bytes without 0x20 space)
* internal name = 0x80 for 0x80 bytes
* serial number (id) = 0x40 for 9 bytes
*/
}
/// <inheritdoc/>
public bool HeaderSignatureMatches(Stream romStream)
{
try
{
// https://github.com/discimagechef/DiscImageChef/blob/master/DiscImageChef.DiscImages/DiscJuggler/Identify.cs#L46
romStream.Seek(-4, SeekOrigin.End);
byte[] cdiDescriptorLength = new byte[4];
romStream.Read(cdiDescriptorLength, 0, 4);
int descriptorLength = BitConverter.ToInt32(cdiDescriptorLength, 0);
if (descriptorLength >= romStream.Length)
{
return(false);
}
byte[] descriptor = new byte[descriptorLength];
romStream.Seek(-descriptorLength, SeekOrigin.End);
romStream.Read(descriptor, 0, descriptorLength);
// Sessions
if (descriptor[0] > 99 || descriptor[0] == 0)
{
return(false);
}
// Seems all sessions start with this data
if (descriptor[1] != 0x00 || descriptor[3] != 0x00 || descriptor[4] != 0x00 || descriptor[5] != 0x00 ||
descriptor[6] != 0x00 || descriptor[7] != 0x00 || descriptor[8] != 0x00 || descriptor[9] != 0x00 ||
descriptor[10] != 0x01 || descriptor[11] != 0x00 || descriptor[12] != 0x00 || descriptor[13] != 0x00 ||
descriptor[14] != 0xFF || descriptor[15] != 0xFF)
{
return(false);
}
// Too many tracks
if (descriptor[2] > 99)
{
return(false);
}
romStream.Seek(0, SeekOrigin.Begin);
CdiDreamcastDisc disc = new CdiDreamcastDisc(new DiscJugglerDisc(romStream));
return(disc.GetMeta().StartsWith("SEGA SEGAKATANA SEGA ENTERPRISES"));
} catch
{
return(false);
}
}
