public string GetFingerprint(IDiscToc toc)
{
int cksum = toc.TrackEntries.Sum(entry => UpdateCddbSum(entry.StartTime));
var trackCount = toc.EndTrack;
var firstEntry = toc.TrackEntries.First();
var totaltime = toc.LeadOutEntry.StartTime - firstEntry.StartTime;
var s = new StringWriter();
// discid
uint id = ((uint)(cksum % 0xff) << 24) | (uint)(totaltime << 8) | (uint)trackCount;
s.Write("{0:x8} ", id);
// number of tracks
s.Write(trackCount);
// frame offsets
foreach (var entry in toc.TrackEntries)
{
s.Write(" {0}", entry.StartFrame);
}
// length (in s) of disc
s.Write(" {0}", toc.LeadOutEntry.StartTime);
return(s.ToString());
}
static void Run(Options o)
{
IDiscToc toc = null;
if (o.PerformTests)
{
toc = TestData.ReadToc(o.Device);
}
else
{
toc = CdRom.ReadToc(o.Device);
}
if (o.All || o.PrintToc)
{
Console.WriteLine($"first: {toc.StartTrack}");
Console.WriteLine($"last: {toc.EndTrack}");
foreach (var e in toc.TrackEntries)
{
Console.WriteLine("track: {0,3} lba: {1,9} {5:00}:{6:00}:{7:00} adr: {2} control: {3} mode: {4}",
e.TrackNumber, e.Lba, e.Adr, e.Control, e.Mode, e.M, e.S, e.F);
}
var l = toc.LeadOutEntry;
Console.WriteLine("track:lout lba: {0,9} {3:00}:{4:00}:{5:00} adr: {1} control: {2}",
l.Lba, l.Adr, l.Control, l.M, l.S, l.F);
}
if (o.All || o.PrintFreeDbDiscID)
{
var freeDbDiscID = new FreeDbDiscID();
var fingerprint = freeDbDiscID.GetFingerprint(toc);
Console.WriteLine("FreeDB DISC ID:\r\n {0}", fingerprint);
var s = new FreeDBService();
var results = s.Query(fingerprint);
foreach (var r in results)
{
Console.WriteLine($"{r.Category} {r.Discid} {r.Artist} / {r.Title}");
var data = s.Read(r);
foreach (var track in data.Tracks)
{
Console.WriteLine("T{0:00} - {1}", track.Number, track.Title);
}
}
}
if (o.All || o.PrintMusicBrainzDiscID)
{
var musicBrainzDiscID = new MusicBrainzDiscID();
Console.WriteLine("MusicBrainz DISC ID:\r\n {0}", musicBrainzDiscID.GetFingerprint(toc));
}
}
public string GetFingerprint(IDiscToc toc)
{
var encoding = System.Text.Encoding.ASCII;
var ba = new byte[(1 + 1 + 4 + 99 * 4) * 2];
// First track number (normally one): 1 byte
var s = String.Format("{0:X2}", (byte)toc.StartTrack);
Array.Copy(encoding.GetBytes(s), 0, ba, 0, 2);
// Last track number: 1 byte
s = String.Format("{0:X2}", (byte)toc.EndTrack);
Array.Copy(encoding.GetBytes(s), 0, ba, 2, 2);
// in sum we have 100 offsets, Lead out + 99 tracks
var offsets = new int[100];
offsets[0] = toc.LeadOutEntry.StartFrame;
int i = 1;
foreach (var e in toc.TrackEntries)
{
offsets[i++] = e.StartFrame;
}
// Add the hex representation of all these
for (i = 0; i < 100; i++)
{
s = String.Format("{0:X8}", offsets[i]);
Array.Copy(encoding.GetBytes(s), 0, ba, 4 + 8 * i, 8);
}
var sha1 = new SHA1Managed();
var hash = sha1.ComputeHash(ba);
var id = Convert.ToBase64String(hash);
// +, /, and = characters, all of which are special HTTP/URL characters.
// To avoid the problems with dealing with that, MusicBrainz uses ., _, and -
id = id.Replace('+', '.');
id = id.Replace('/', '_');
id = id.Replace('=', '-');
return(id);
}
