/// <summary>
/// calculates the complete disc hash for matching to a redump
/// </summary>
public uint Calculate_PSX_RedumpHash()
{
//a special CRC32 is used to help us match redump's DB
SpecialCRC32 crc = new SpecialCRC32();
byte[] buffer2352 = new byte[2352];
var dsr = new DiscSectorReader(disc);
dsr.Policy.DeterministicClearBuffer = false; //live dangerously
//read all sectors for redump hash
for (int i = 0; i < disc.Session1.LeadoutLBA; i++)
{
dsr.ReadLBA_2352(i, buffer2352, 0);
crc.Add(buffer2352, 0, 2352);
}
return crc.Result;
}
/// <summary>
/// calculates the complete disc hash for matching to a redump
/// </summary>
public uint Calculate_PSX_RedumpHash()
{
//a special CRC32 is used to help us match redump's DB
SpecialCRC32 crc = new SpecialCRC32();
byte[] buffer2352 = new byte[2352];
var dsr = new DiscSectorReader(disc);
dsr.Policy.DeterministicClearBuffer = false; //live dangerously
//read all sectors for redump hash
for (int i = 0; i < disc.Session1.LeadoutLBA; i++)
{
dsr.ReadLBA_2352(i, buffer2352, 0);
crc.Add(buffer2352, 0, 2352);
}
return(crc.Result);
}
/// <summary>
/// calculates the hash for quick PSX Disc identification
/// </summary>
public uint Calculate_PSX_BizIDHash()
{
//notes about the hash:
//"Arc the Lad II (J) 1.0 and 1.1 conflict up to 25 sectors (so use 26)
//Tekken 3 (Europe) (Alt) and Tekken 3 (Europe) conflict in track 2 and 3 unfortunately, not sure what to do about this yet
//the TOC isn't needed!
//but it will help detect dumps with mangled TOCs which are all too common
//
//a possibly special CRC32 is used to help us match redump's DB elsewhere
SpecialCRC32 crc = new SpecialCRC32();
byte[] buffer2352 = new byte[2352];
var dsr = new DiscSectorReader(disc)
{
Policy = { DeterministicClearBuffer = false } // live dangerously
};
//hash the TOC
crc.Add((int)disc.TOC.Session1Format);
crc.Add(disc.TOC.FirstRecordedTrackNumber);
crc.Add(disc.TOC.LastRecordedTrackNumber);
for (int i = 1; i <= 100; i++)
{
//if (disc.TOC.TOCItems[i].Exists) Console.WriteLine("{0:X8} {1:X2} {2:X2} {3:X8}", crc.Current, (int)disc.TOC.TOCItems[i].Control, disc.TOC.TOCItems[i].Exists ? 1 : 0, disc.TOC.TOCItems[i].LBATimestamp.Sector); //a little debugging
crc.Add((int)disc.TOC.TOCItems[i].Control);
crc.Add(disc.TOC.TOCItems[i].Exists ? 1 : 0);
crc.Add((int)disc.TOC.TOCItems[i].LBA);
}
//hash first 26 sectors
for (int i = 0; i < 26; i++)
{
dsr.ReadLBA_2352(i, buffer2352, 0);
crc.Add(buffer2352, 0, 2352);
}
return(crc.Result);
}
/// <summary>
/// calculates the hash for quick PSX Disc identification
/// </summary>
public uint Calculate_PSX_BizIDHash()
{
//notes about the hash:
//"Arc the Lad II (J) 1.0 and 1.1 conflict up to 25 sectors (so use 26)
//Tekken 3 (Europe) (Alt) and Tekken 3 (Europe) conflict in track 2 and 3 unfortunately, not sure what to do about this yet
//the TOC isn't needed!
//but it will help detect dumps with mangled TOCs which are all too common
//
//a possibly special CRC32 is used to help us match redump's DB elsewhere
SpecialCRC32 crc = new SpecialCRC32();
byte[] buffer2352 = new byte[2352];
var dsr = new DiscSectorReader(disc);
dsr.Policy.DeterministicClearBuffer = false; //live dangerously
//hash the TOC
crc.Add((int)disc.TOC.Session1Format);
crc.Add(disc.TOC.FirstRecordedTrackNumber);
crc.Add(disc.TOC.LastRecordedTrackNumber);
for (int i = 1; i <= 100; i++)
{
//if (disc.TOC.TOCItems[i].Exists) Console.WriteLine("{0:X8} {1:X2} {2:X2} {3:X8}", crc.Current, (int)disc.TOC.TOCItems[i].Control, disc.TOC.TOCItems[i].Exists ? 1 : 0, disc.TOC.TOCItems[i].LBATimestamp.Sector); //a little debugging
crc.Add((int)disc.TOC.TOCItems[i].Control);
crc.Add(disc.TOC.TOCItems[i].Exists ? 1 : 0);
crc.Add((int)disc.TOC.TOCItems[i].LBA);
}
//hash first 26 sectors
for (int i = 0; i < 26; i++)
{
dsr.ReadLBA_2352(i, buffer2352, 0);
crc.Add(buffer2352, 0, 2352);
}
return crc.Result;
}
