public static uint ComputeCueCrc(CueSheet cue)
{
if (!cue.HasDataTrack())
{
throw new Exception("Audio only CDs are not supported for hashing");
}
CueSheet.Track track = cue.FindFirstDataTrack();
uint crcAccum = 0xFFFFFFFF;
using (FileStream fs = new FileStream(track.FileName, FileMode.Open, FileAccess.Read))
{
using (BinaryReader reader = new BinaryReader(fs))
{
fs.Seek(track.FileOffset, SeekOrigin.Begin);
int numsects = 1;
for (int i = 0; i < numsects; ++i)
{
byte[] data;
if (track.SectorSize == CueSheet.SectorSize._2352)
{
reader.ReadBytes(16);
data = reader.ReadBytes(2048);
reader.ReadBytes(288);
}
else
{
data = reader.ReadBytes(2048);
}
if (i == 0) //check signature
{
if (data[0x100] != 'S' || data[0x101] != 'E' || data[0x102] != 'G' || data[0x103] != 'A')
{
//Debug.Assert(false);
Console.WriteLine("Err\n");
}
}
crcAccum = Crc32.ComputeStep(crcAccum, data);
}
crcAccum = Crc32.Finalize(crcAccum);
}
}
return(crcAccum);
}
void TestCueSheet()
{
CueSheet cue = new CueSheet(@"K:\mame\roms\Akumajou_Dracula_X_-_Chi_no_Rinne_(NTSC-J)_[KMCD3005]\Akumajou_Dracula_X_-_Chi_no_Rinne_(NTSC-J)_[KMCD3005].cue");
CueSheet.Track track = cue.FindFirstDataTrack();
using (FileStream fs = new FileStream(track.FileName, FileMode.Open))
{
using (BinaryReader reader = new BinaryReader(fs))
{
fs.Seek(track.FileOffset, SeekOrigin.Begin);
int numsects = 10;
uint crcAccum = 0xFFFFFFFF;
for (int i = 0; i < numsects; ++i)
{
byte[] data;
if (track.SectorSize == CueSheet.SectorSize._2352)
{
reader.ReadBytes(16);
data = reader.ReadBytes(2048);
reader.ReadBytes(288);
}
else
{
data = reader.ReadBytes(2048);
}
if (i == 0) //check signature
{
if (data[0] != 0x82 || data[1] != 0xB1 || data[2] != 0x82 || data[3] != 0xCC || data[4] != 0x83 || data[5] != 0x76 || data[6] != 0x83 || data[7] != 0x8D)
{
Debug.Assert(false);
}
}
crcAccum = Crc32.ComputeStep(crcAccum, data);
}
crcAccum = Crc32.Finalize(crcAccum);
}
}
}
