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fix Jaguar CD homebrew hashing wrt retroachievements

This commit is contained in:
CasualPokePlayer 2023-04-18 22:38:13 -07:00
parent a46c47d271
commit 955139454a
1 changed files with 77 additions and 55 deletions
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30
src/BizHawk.Client.EmuHawk/RetroAchievements/RetroAchievements.GameVerification.cs
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@ -163,16 +163,18 @@ namespace BizHawk.Client.EmuHawk
case ConsoleID.JaguarCD:
// we want to hash the second session of the disc
if (disc.Sessions.Count > 2)
{
static string HashJaguar(DiscTrack bootTrack, DiscSectorReader dsr)
{
const string _jaguarHeader = "ATARI APPROVED DATA HEADER ATRI";
const string _jaguarBSHeader = "TARA IPARPVODED TA AEHDAREA RT";
var bootSession = disc.Sessions[2];
var buffer = new List<byte>();
var buf2352 = new byte[2352];
// find the boot track header
// see https://github.com/TASEmulators/BizHawk/blob/f29113287e88c6a644dbff30f92a9833307aad20/waterbox/virtualjaguar/src/cdhle.cpp#L109-L145
var startLba = bootSession.FirstInformationTrack.LBA;
var numLbas = bootSession.FirstInformationTrack.NextTrack.LBA - bootSession.FirstInformationTrack.LBA;
var startLba = bootTrack.LBA;
var numLbas = bootTrack.NextTrack.LBA - bootTrack.LBA;
int bootLen = 0, bootLba = 0, bootOff = 0;
bool byteswapped = false, foundHeader = false;
for (var i = 0; i < numLbas; i++)
@ -215,7 +217,7 @@ namespace BizHawk.Client.EmuHawk
if (!foundHeader)
{
return 0;
return null;
}
dsr.ReadLBA_2352(bootLba++, buf2352, 0);
@ -241,8 +243,28 @@ namespace BizHawk.Client.EmuHawk
bootLen -= 2352;
}
return MD5Checksum.ComputeDigestHex(buffer.ToArray());
}
var jaguarHash = HashJaguar(disc.Sessions[2].Tracks[1], dsr);
switch (jaguarHash)
{
case null:
return 0;
case "254487B59AB21BC005338E85CBF9FD2F": // see https://github.com/RetroAchievements/rcheevos/pull/234
{
jaguarHash = HashJaguar(disc.Sessions[2].Tracks[2], dsr);
if (jaguarHash is null)
{
return 0;
}
break;
}
}
return IdentifyHash(jaguarHash);
}
return 0;
}