aaru-dps/Aaru.Checksums
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Output status of CD sector checks.

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This commit is contained in:
Natalia Portillo
2020-07-18 15:27:26 +01:00
parent d4e706c90b
commit b2afbebd83
1 changed files with 28 additions and 4 deletions
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32
CDChecksums.cs
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@@ -44,8 +44,13 @@ namespace Aaru.Checksums
static byte[] eccBTable;
static uint[] edcTable;
public static bool? CheckCdSector(byte[] buffer)
public static bool? CheckCdSector(byte[] buffer, out bool? correctEccP, out bool? correctEccQ,
out bool? correctEdc)
{
correctEccP = null;
correctEccQ = null;
correctEdc = null;
switch(buffer.Length)
{
case 2448:
@@ -56,7 +61,9 @@ namespace Aaru.Checksums
Array.Copy(buffer, 0, channel, 0, 2352);
Array.Copy(buffer, 2352, subchannel, 0, 96);
bool? channelStatus = CheckCdSectorChannel(channel);
bool? channelStatus =
CheckCdSectorChannel(channel, out correctEccP, out correctEccQ, out correctEdc);
bool? subchannelStatus = CheckCdSectorSubChannel(subchannel);
bool? status = null;
@@ -79,7 +86,7 @@ namespace Aaru.Checksums
return status;
}
case 2352: return CheckCdSectorChannel(buffer);
case 2352: return CheckCdSectorChannel(buffer, out correctEccP, out correctEccQ, out correctEdc);
default: return null;
}
}
@@ -140,10 +147,15 @@ namespace Aaru.Checksums
return true;
}
static bool? CheckCdSectorChannel(byte[] channel)
static bool? CheckCdSectorChannel(byte[] channel, out bool? correctEccP, out bool? correctEccQ,
out bool? correctEdc)
{
EccInit();
correctEccP = null;
correctEccQ = null;
correctEdc = null;
if(channel[0x000] != 0x00 ||
channel[0x001] != 0xFF ||
channel[0x002] != 0xFF ||
@@ -214,6 +226,9 @@ namespace Aaru.Checksums
bool failedEccP = !CheckEcc(address, data, 86, 24, 2, 86, eccP);
bool failedEccQ = !CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
correctEccP = !failedEccP;
correctEccQ = !failedEccQ;
if(failedEccP)
AaruConsole.DebugWriteLine("CD checksums",
"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
@@ -227,6 +242,8 @@ namespace Aaru.Checksums
uint storedEdc = BitConverter.ToUInt32(channel, 0x810);
uint calculatedEdc = ComputeEdc(0, channel, 0x810);
correctEdc = calculatedEdc == storedEdc;
if(calculatedEdc == storedEdc)
return !failedEccP && !failedEccQ;
@@ -262,6 +279,8 @@ namespace Aaru.Checksums
uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x91C);
correctEdc = calculatedEdc == storedEdc || storedEdc == 0;
if(calculatedEdc == storedEdc ||
storedEdc == 0x00000000)
return true;
@@ -293,6 +312,9 @@ namespace Aaru.Checksums
bool failedEccP = !CheckEcc(address, mode2Sector, 86, 24, 2, 86, eccP);
bool failedEccQ = !CheckEcc(address, mode2Sector, 52, 43, 86, 88, eccQ);
correctEccP = !failedEccP;
correctEccQ = !failedEccQ;
if(failedEccP)
AaruConsole.DebugWriteLine("CD checksums",
"Mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
@@ -306,6 +328,8 @@ namespace Aaru.Checksums
uint storedEdc = BitConverter.ToUInt32(mode2Sector, 0x808);
uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x808);
correctEdc = calculatedEdc == storedEdc;
if(calculatedEdc == storedEdc)
return !failedEccP && !failedEccQ;