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Implemented decoding DVD-RAM medium status.

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Natalia Portillo
2015-12-02 06:34:12 +00:00
parent 8955b078b3
commit ba50144dca
4 changed files with 100 additions and 1 deletions
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88
DiscImageChef.Decoders/DVD/Cartridge.cs
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@@ -36,6 +36,7 @@
// ****************************************************************************/
// //$Id$
using System;
using System.Text;
namespace DiscImageChef.Decoders.DVD
{
@@ -53,7 +54,6 @@ namespace DiscImageChef.Decoders.DVD
/// T10/1675-D revision 2c
/// T10/1675-D revision 4
/// T10/1836-D revision 2g
/// ECMA 365
/// </summary>
public static class Cartridge
{
@@ -125,6 +125,92 @@ namespace DiscImageChef.Decoders.DVD
/// </summary>
public byte RAMSWI;
}
public static MediumStatus? Decode(byte[] response)
{
if (response == null)
return null;
if (response.Length != 8)
return null;
MediumStatus status = new MediumStatus();
status.DataLength = (ushort)((response[0] << 8) + response[1]);
status.Reserved1 = response[2];
status.Reserved2 = response[3];
status.Cartridge |= (response[4] & 0x80) == 0x80;
status.OUT |= (response[4] & 0x40) == 0x40;
status.Reserved3 = (byte)((response[4] & 0x30) >> 4);
status.MSWI |= (response[4] & 0x08) == 0x08;
status.CWP |= (response[4] & 0x04) == 0x04;
status.PWP |= (response[4] & 0x02) == 0x02;
status.Reserved4 |= (response[4] & 0x01) == 0x01;
status.DiscType = response[5];
status.Reserved5 = response[6];
status.RAMSWI = response[7];
return status;
}
public static string Prettify(MediumStatus? status)
{
if (status == null)
return null;
MediumStatus decoded = status.Value;
StringBuilder sb = new StringBuilder();
if (decoded.PWP)
sb.AppendLine("Disc surface is set to write protected status");
if (decoded.Cartridge)
{
sb.AppendLine("Disc comes in a cartridge");
if (decoded.OUT)
sb.AppendLine("Disc has been extracted from the cartridge");
if (decoded.CWP)
sb.AppendLine("Cartridge is set to write protected");
}
switch (decoded.DiscType)
{
case 0:
sb.AppendLine("Disc shall not be written without a cartridge");
break;
case 0x10:
sb.AppendLine("Disc may be written without a cartridge");
break;
default:
sb.AppendFormat("Unknown disc type id {0}", decoded.DiscType).AppendLine();
break;
}
if (decoded.MSWI)
{
switch (decoded.RAMSWI)
{
case 0:
break;
case 1:
sb.AppendLine("Disc is write inhibited because it has been extracted from the cartridge");
break;
case 0xFF:
sb.AppendLine("Disc is write inhibited for an unspecified reason");
break;
default:
sb.AppendFormat("Disc has unknown reason {0} for write inhibition", decoded.RAMSWI).AppendLine();
break;
}
}
return sb.ToString();
}
public static string Prettify(byte[] response)
{
return Prettify(Decode(response));
}
}
}