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🐛Correct CD ECC calcuations, fixes #170.

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This commit is contained in:
Natalia Portillo
2018-04-10 04:39:33 +01:00
parent d05fd46882
commit c23d03ee0c
1 changed files with 75 additions and 71 deletions
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20
DiscImageChef.Checksums/CDChecksums.cs
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@@ -197,13 +197,13 @@ namespace DiscImageChef.Checksums
byte[] eccQ = new byte[104];
Array.Copy(channel, 0x0C, address, 0, 4);
Array.Copy(channel, 0x0C, data, 0, 2060);
Array.Copy(channel, 0x0C, data2, 0, 2232);
Array.Copy(channel, 0x10, data, 0, 2060);
Array.Copy(channel, 0x10, data2, 0, 2232);
Array.Copy(channel, 0x81C, eccP, 0, 172);
Array.Copy(channel, 0x8C8, eccQ, 0, 104);
bool failedEccP = CheckEcc(address, data, 86, 24, 2, 86, eccP);
bool failedEccQ = CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
bool failedEccP = !CheckEcc(address, data, 86, 24, 2, 86, eccP);
bool failedEccQ = !CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
if(failedEccP)
DicConsole.DebugWriteLine("CD checksums",
@@ -276,13 +276,13 @@ namespace DiscImageChef.Checksums
address[1] = 0;
address[2] = 0;
address[3] = 0;
Array.Copy(channel, 0x0C, data, 0, 2060);
Array.Copy(channel, 0x0C, data2, 0, 2232);
Array.Copy(channel, 0x10, data, 0, 2060);
Array.Copy(channel, 0x10, data2, 0, 2232);
Array.Copy(channel, 0x80C, eccP, 0, 172);
Array.Copy(channel, 0x8B8, eccQ, 0, 104);
bool failedEccP = CheckEcc(address, data, 86, 24, 2, 86, eccP);
bool failedEccQ = CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
bool failedEccP = !CheckEcc(address, data, 86, 24, 2, 86, eccP);
bool failedEccQ = !CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
if(failedEccP)
DicConsole.DebugWriteLine("CD checksums",
@@ -340,6 +340,7 @@ namespace DiscImageChef.Checksums
cdTextPack3[j] = 0;
cdTextPack4[j] = 0;
}
for(int j = 0; j < 24; j++)
{
cdSubRwPack1[j] = 0;
@@ -370,6 +371,7 @@ namespace DiscImageChef.Checksums
if(j < 18) cdTextPack1[j] = (byte)(cdTextPack1[j] | ((subchannel[i++] & 0x03) << 6));
if(j < 18) cdTextPack1[j] = (byte)(cdTextPack1[j] | (subchannel[i++] & 0x3F));
}
for(int j = 0; j < 18; j++)
{
if(j < 18) cdTextPack2[j] = (byte)(cdTextPack2[j] | ((subchannel[i++] & 0x3F) << 2));
@@ -379,6 +381,7 @@ namespace DiscImageChef.Checksums
if(j < 18) cdTextPack2[j] = (byte)(cdTextPack2[j] | ((subchannel[i++] & 0x03) << 6));
if(j < 18) cdTextPack2[j] = (byte)(cdTextPack2[j] | (subchannel[i++] & 0x3F));
}
for(int j = 0; j < 18; j++)
{
if(j < 18) cdTextPack3[j] = (byte)(cdTextPack3[j] | ((subchannel[i++] & 0x3F) << 2));
@@ -388,6 +391,7 @@ namespace DiscImageChef.Checksums
if(j < 18) cdTextPack3[j] = (byte)(cdTextPack3[j] | ((subchannel[i++] & 0x03) << 6));
if(j < 18) cdTextPack3[j] = (byte)(cdTextPack3[j] | (subchannel[i++] & 0x3F));
}
for(int j = 0; j < 18; j++)
{
if(j < 18) cdTextPack4[j] = (byte)(cdTextPack4[j] | ((subchannel[i++] & 0x3F) << 2));