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Try to fix Q also when looking if pregap is 0.

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This commit is contained in:
Natalia Portillo
2020-01-10 00:49:47 +00:00
parent 29f6592219
commit 2801c4f67a
1 changed files with 45 additions and 5 deletions
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50
DiscImageChef.Core/Devices/Dumping/CompactDisc/Pregap.cs
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@@ -196,6 +196,7 @@ namespace DiscImageChef.Core.Devices.Dumping
bool goneBack = false;
bool goFront = false;
bool forward = false;
bool crcOk = false;
// Check if pregap is 0
for(retries = 0; retries < 10; retries++)
@@ -222,9 +223,50 @@ namespace DiscImageChef.Core.Devices.Dumping
subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8], subBuf[9],
subBuf[10], subBuf[11], crc[0], crc[1]);
if(crc[0] != subBuf[10] ||
crc[1] != subBuf[11])
continue;
crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
// Try to do a simple correction
if(!crcOk)
{
// Data track cannot have 11xxb in CONTROL
if((subBuf[0] & 0x40) > 0)
subBuf[0] &= 0x7F;
// ADR only uses two bits
subBuf[0] &= 0xF3;
// Don't care about other Q modes
if((subBuf[0] & 0xF) == 1)
{
// ZERO only used in DDCD
subBuf[6] = 0;
// Fix BCD numbering
for(int i = 1; i < 10; i++)
{
if((subBuf[i] & 0xF0) > 0xA0)
subBuf[i] &= 0x7F;
if((subBuf[i] & 0x0F) > 0x0A)
subBuf[i] &= 0xF7;
}
}
CRC16CCITTContext.Data(subBuf, 10, out crc);
crcOk = crc[0] == subBuf[10] && crc[1] == subBuf[11];
if(crcOk)
{
DicConsole.DebugWriteLine("Pregap calculator",
"LBA: {0}, Try {1}, Sense {2}, Q (FIXED): {3:X2} {4:X2} {5:X2} {6:X2} {7:X2} {8:X2} {9:X2} {10:X2} {11:X2} {12:X2} CRC 0x{13:X2}{14:X2}, Calculated CRC: 0x{15:X2}{16:X2}",
lba, retries + 1, sense, subBuf[0], subBuf[1], subBuf[2],
subBuf[3], subBuf[4], subBuf[5], subBuf[6], subBuf[7], subBuf[8],
subBuf[9], subBuf[10], subBuf[11], crc[0], crc[1]);
}
else
continue;
}
BcdToBinaryQ(subBuf);
@@ -258,8 +300,6 @@ namespace DiscImageChef.Core.Devices.Dumping
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, (uint)lba - 10, dbDev, out subBuf)
: GetSectorForPregapQ16(dev, (uint)lba - 10, dbDev, out subBuf);
bool crcOk = false;
for(retries = 0; retries < 10; retries++)
{
sense = supportsRwSubchannel ? GetSectorForPregapRaw(dev, (uint)lba, dbDev, out subBuf)