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Add support for different mode sectors in ISO9660.

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This commit is contained in:
Natalia Portillo
2019-07-31 17:02:50 +01:00
parent 3a7f95f3e4
commit 25f69a99e5
8 changed files with 106 additions and 23 deletions
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81
DiscImageChef.Filesystems/ISO9660/Mode2.cs Normal file
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using System.IO;
namespace DiscImageChef.Filesystems.ISO9660
{
public partial class ISO9660
{
byte[] ReadSectors(ulong start, uint count)
{
MemoryStream ms = new MemoryStream();
for(ulong sector = start; sector < start + count; sector++)
{
byte[] data = image.ReadSector(sector);
switch(data.Length)
{
case 2048:
// Mode 1 sector
ms.Write(data, 0, 2048);
break;
case 2352:
// Not a data sector
if(data[0] != 0 || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF ||
data[4] != 0xFF ||
data[5] != 0xFF || data[6] != 0xFF || data[7] != 0xFF || data[8] != 0xFF ||
data[9] != 0xFF || data[10] != 0xFF || data[11] != 0x00)
{
ms.Write(data, 0, 2352);
break;
}
switch(data[15])
{
// Mode 0 sector
case 0:
ms.Write(new byte[2048], 0, 2048);
break;
// Mode 1 sector
case 1:
ms.Write(data, 16, 2048);
break;
case 2:
// Mode 2 form 1 sector
if((data[16] & MODE2_FORM2) != 0)
{
ms.Write(data, 24, 2048);
break;
}
// Mode 2 form 2 sector
ms.Write(data, 24, 2324);
break;
// Unknown, audio?
default:
ms.Write(data, 0, 2352);
break;
}
break;
case 2336:
// Mode 2 form 1 sector
if((data[16] & MODE2_FORM2) == 0)
{
ms.Write(data, 8, 2048);
break;
}
// Mode 2 form 2 sector
ms.Write(data, 8, 2324);
break;
// Should not happen, but, just in case
default:
ms.Write(data, 0, data.Length);
break;
}
}
return ms.ToArray();
}
}
}