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Try to solve pregaps when drive+disc combination returns wrong Q positioning and report this has been the case.

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This commit is contained in:
Natalia Portillo
2020-01-06 18:36:11 +00:00
parent 93d0671e49
commit 9be90b7cb9
3 changed files with 27 additions and 5 deletions
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11
DiscImageChef.Core/Devices/Dumping/CompactDisc/Dump.cs
View File

@@ -344,7 +344,16 @@ namespace DiscImageChef.Core.Devices.Dumping
if(tracks is null)
return;
SolveTrackPregaps(_dev, _dumpLog, UpdateStatus, tracks, supportsPqSubchannel, supportsRwSubchannel, _dbDev);
SolveTrackPregaps(_dev, _dumpLog, UpdateStatus, tracks, supportsPqSubchannel, supportsRwSubchannel, _dbDev,
out bool inexactPositioning);
if(inexactPositioning)
{
_dumpLog.WriteLine("WARNING: The drive has returned incorrect Q positioning when calculating pregaps. A best effort has been tried but they may be incorrect.");
UpdateStatus?.
Invoke("WARNING: The drive has returned incorrect Q positioning when calculating pregaps. A best effort has been tried but they may be incorrect.");
}
for(int t = 1; t < tracks.Length; t++)
tracks[t - 1].TrackEndSector = tracks[t].TrackStartSector - 1;

12
DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
View File

@@ -123,16 +123,16 @@ namespace DiscImageChef.Core.Devices.Dumping
public static void SolveTrackPregaps(Device dev, DumpLog dumpLog, UpdateStatusHandler updateStatus,
Track[] tracks, bool supportsPqSubchannel, bool supportsRwSubchannel,
Database.Models.Device dbDev)
Database.Models.Device dbDev, out bool inexactPositioning)
{
bool sense; // Sense indicator
byte[] cmdBuf; // Data buffer
byte[] subBuf;
int posQ;
uint retries;
bool? bcd = null;
byte[] crc;
Dictionary<uint, int> pregaps = new Dictionary<uint, int>();
inexactPositioning = false;
if(!supportsPqSubchannel &&
!supportsRwSubchannel)
@@ -296,6 +296,14 @@ namespace DiscImageChef.Core.Devices.Dumping
// Pregap according to Q position
int pregapQ = (subBuf[3] * 60 * 75) + (subBuf[4] * 75) + subBuf[5] + 1;
posQ = ((subBuf[7] * 60 * 75) + (subBuf[8] * 75) + subBuf[9]) - 150;
int diff = posQ - lba;
if(diff != 0)
{
inexactPositioning = true;
pregapQ += diff;
}
// Bigger than known change, otherwise we found it
if(pregapQ > pregaps[track.TrackSequence])

7
DiscImageChef/Commands/Media/Info.cs
View File

@@ -559,7 +559,8 @@ namespace DiscImageChef.Commands.Media
ctx.Devices.FirstOrDefault(d => d.Manufacturer == dev.Manufacturer && d.Model == dev.Model &&
d.Revision == dev.Revision);
Dump.SolveTrackPregaps(dev, null, null, tracks, supportsPqSubchannel, supportsRwSubchannel, dbDev);
Dump.SolveTrackPregaps(dev, null, null, tracks, supportsPqSubchannel, supportsRwSubchannel, dbDev,
out bool inexactPositioning);
for(int t = 1; t < tracks.Length; t++)
tracks[t - 1].TrackEndSector = tracks[t].TrackStartSector - 1;
@@ -569,6 +570,10 @@ namespace DiscImageChef.Commands.Media
DicConsole.WriteLine();
DicConsole.WriteLine("Track calculations:");
if(inexactPositioning)
DicConsole.
WriteLine("WARNING: The drive has returned incorrect Q positioning when calculating pregaps. A best effort has been tried but they may be incorrect.");
foreach(Track track in tracks)
DicConsole.
WriteLine("Track {0} starts at LBA {1}, ends at LBA {2}, has a pregap of {3} sectors and is of type {4}",