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Calculate pregap when drive only supports reading Q subchannel.

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This commit is contained in:
Natalia Portillo
2020-01-06 01:12:00 +00:00
parent fb0281ef41
commit 93d0671e49
2 changed files with 47 additions and 7 deletions
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52
DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
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@@ -141,7 +141,8 @@ namespace DiscImageChef.Core.Devices.Dumping
// Check if subchannel is BCD
for(retries = 0; retries < 10; retries++)
{
sense = GetSectorForPregap(dev, 11, dbDev, out subBuf);
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, 11, dbDev, out subBuf)
: GetSectorForPregapQ16(dev, 11, dbDev, out subBuf);
if(sense)
continue;
@@ -180,7 +181,8 @@ namespace DiscImageChef.Core.Devices.Dumping
// Check if pregap is 0
for(retries = 0; retries < 10; retries++)
{
sense = GetSectorForPregap(dev, (uint)lba, dbDev, out subBuf);
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, (uint)lba, dbDev, out subBuf)
: GetSectorForPregapQ16(dev, (uint)lba, dbDev, out subBuf);
if(sense)
continue;
@@ -221,11 +223,13 @@ namespace DiscImageChef.Core.Devices.Dumping
while(lba > (int)previousTrack.TrackStartSector)
{
// Some drives crash if you try to read just before the previous read, so seek away first
GetSectorForPregap(dev, (uint)lba - 10, dbDev, out subBuf);
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, (uint)lba - 10, dbDev, out subBuf)
: GetSectorForPregapQ16(dev, (uint)lba - 10, dbDev, out subBuf);
for(retries = 0; retries < 10; retries++)
{
sense = GetSectorForPregap(dev, (uint)lba, dbDev, out subBuf);
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, (uint)lba, dbDev, out subBuf)
: GetSectorForPregapQ16(dev, (uint)lba, dbDev, out subBuf);
if(sense)
continue;
@@ -315,7 +319,7 @@ namespace DiscImageChef.Core.Devices.Dumping
}
}
static bool GetSectorForPregap(Device dev, uint lba, Database.Models.Device dbDev, out byte[] subBuf)
static bool GetSectorForPregapRaw(Device dev, uint lba, Database.Models.Device dbDev, out byte[] subBuf)
{
byte[] cmdBuf;
bool sense;
@@ -370,6 +374,44 @@ namespace DiscImageChef.Core.Devices.Dumping
return sense;
}
static bool GetSectorForPregapQ16(Device dev, uint lba, Database.Models.Device dbDev, out byte[] subBuf)
{
byte[] cmdBuf;
bool sense;
subBuf = null;
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.AllTypes, false, false, true,
MmcHeaderCodes.AllHeaders, true, true, MmcErrorField.None, MmcSubchannel.Q16,
dev.Timeout, out _);
if(sense)
sense = dev.ReadCd(out cmdBuf, out _, lba, 2368, 1, MmcSectorTypes.Cdda, false, false, false,
MmcHeaderCodes.None, true, false, MmcErrorField.None, MmcSubchannel.Q16, dev.Timeout,
out _);
if(!sense)
{
subBuf = new byte[16];
Array.Copy(cmdBuf, 2352, subBuf, 0, 16);
}
else
{
sense = dev.ReadCd(out cmdBuf, out _, lba, 16, 1, MmcSectorTypes.AllTypes, false, false, false,
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Q16,
dev.Timeout, out _);
if(sense)
sense = dev.ReadCd(out cmdBuf, out _, lba, 16, 1, MmcSectorTypes.Cdda, false, false, false,
MmcHeaderCodes.None, false, false, MmcErrorField.None, MmcSubchannel.Q16,
dev.Timeout, out _);
if(!sense)
subBuf = cmdBuf;
}
return sense;
}
static byte[] DeinterleaveQ(byte[] subchannel)
{
int[] q = new int[subchannel.Length / 8];