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Calculate offset on discs where an audio track follows a data track, and offset is less than one sector.

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This commit is contained in:
Natalia Portillo
2020-01-02 23:13:03 +00:00
parent 26b9f44269
commit 155648a174
1 changed files with 34 additions and 0 deletions
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34
DiscImageChef.Core/Media/Info/CompactDisc.cs
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@@ -6,6 +6,7 @@ using DiscImageChef.CommonTypes.Structs;
using DiscImageChef.Core.Logging; using DiscImageChef.Core.Logging;
using DiscImageChef.Core.Media.Detection; using DiscImageChef.Core.Media.Detection;
using DiscImageChef.Database.Models; using DiscImageChef.Database.Models;
using DiscImageChef.Decoders.CD;
using DiscImageChef.Devices; using DiscImageChef.Devices;
using Device = DiscImageChef.Database.Models.Device; using Device = DiscImageChef.Database.Models.Device;
@@ -220,6 +221,39 @@ namespace DiscImageChef.Core.Media.Info
break; break;
} }
if(!offsetFound &&
audioTrack.TrackPregap > 0)
{
sense = dev.ReadCd(out byte[] dataBuf, out _, (uint)dataTrack.TrackEndSector,
sectorSize, 1, MmcSectorTypes.AllTypes, false, false, true,
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None,
MmcSubchannel.None, dev.Timeout, out _);
if(!sense &&
!dev.Error)
{
for(int i = 0; i < dataBuf.Length; i++)
dataBuf[i] ^= Sector.ScrambleTable[i];
for(int i = 0; i < 2352; i++)
{
byte[] dataSide = new byte[2352 - i];
byte[] audioSide = new byte[2352 - i];
Array.Copy(dataBuf, i, dataSide, 0, dataSide.Length);
Array.Copy(cmdBuf, 0, audioSide, 0, audioSide.Length);
if(!dataSide.SequenceEqual(audioSide))
continue;
offsetBytes = audioSide.Length;
offsetFound = true;
break;
}
}
}
} }
} }
} }