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Added decoding Lead-In CMI for DVD.

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This commit is contained in:
Natalia Portillo
2015-12-01 04:23:08 +00:00
parent 053dbdc79d
commit 06f00c93f9
4 changed files with 100 additions and 1 deletions
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83
DiscImageChef.Decoders/DVD/CSS&CPRM.cs
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@@ -36,6 +36,7 @@
// ****************************************************************************/
// //$Id$
using System;
using System.Text;
namespace DiscImageChef.Decoders.DVD
{
@@ -119,6 +120,88 @@ namespace DiscImageChef.Decoders.DVD
/// </summary>
public byte[] Key;
}
public static LeadInCopyright? DecodeLeadInCopyright(byte[] response)
{
if(response == null)
return null;
if (response.Length != 8)
return null;
LeadInCopyright cmi = new LeadInCopyright();
cmi.DataLength = (ushort)((response[0] << 8) + response[1]);
cmi.Reserved1 = response[2];
cmi.Reserved2 = response[3];
cmi.CopyrightType = response[4];
cmi.RegionInformation = response[5];
cmi.Reserved3 = response[6];
cmi.Reserved4 = response[7];
}
public static string PrettifyLeadInCopyright(LeadInCopyright? cmi)
{
if (cmi == null)
return null;
LeadInCopyright decoded = cmi.Value;
StringBuilder sb = new StringBuilder();
switch (decoded.CopyrightType)
{
case 0x00:
sb.AppendLine("Disc has no encryption.");
break;
case 0x01:
sb.AppendLine("Disc is encrypted using CSS or CPPM.");
break;
case 0x02:
sb.AppendLine("Disc is encrypted using CPRM.");
break;
case 0x10:
sb.AppendLine("Disc is encrypted using AACS.");
break;
default:
sb.AppendFormat("Disc is encrypted using unknown algorithm with ID {0}.", decoded.CopyrightType);
break;
}
if (decoded.CopyrightType == 0)
return sb.ToString();
if (decoded.RegionInformation == 0xFF)
sb.AppendLine("Disc cannot be played in any region at all.");
else if (decoded.RegionInformation == 0x00)
sb.AppendLine("Disc can be played in any region.");
else
{
sb.Append("Disc can be played in the following regions:");
if ((decoded.RegionInformation & 0x01) != 0x01)
sb.Append(" 0");
if ((decoded.RegionInformation & 0x02) != 0x02)
sb.Append(" 1");
if ((decoded.RegionInformation & 0x04) != 0x04)
sb.Append(" 2");
if ((decoded.RegionInformation & 0x08) != 0x08)
sb.Append(" 3");
if ((decoded.RegionInformation & 0x10) != 0x10)
sb.Append(" 4");
if ((decoded.RegionInformation & 0x20) != 0x20)
sb.Append(" 5");
if ((decoded.RegionInformation & 0x40) != 0x40)
sb.Append(" 6");
if ((decoded.RegionInformation & 0x80) != 0x80)
sb.Append(" 7");
}
return sb.ToString();
}
public static string PrettifyLeadInCopyright(byte[] response)
{
return PrettifyLeadInCopyright(DecodeLeadInCopyright(response));
}
}
}