aaru-dps/Aaru
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.git synced 2025-12-16 19:24:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implemented Mode Page 0x0F: Data compression page.

Browse Source
This commit is contained in:
Natalia Portillo
2015-10-31 02:25:29 +00:00
parent 9df648cded
commit 607c267496
2 changed files with 168 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

163
DiscImageChef.Decoders/SCSI/Modes.cs
View File

@@ -4952,6 +4952,169 @@ namespace DiscImageChef.Decoders.SCSI
return sb.ToString();
}
#endregion Mode Page 0x1C subpage 0x01: Background Control mode page
#region Mode Page 0x0F: Data compression page
/// <summary>
/// Data compression page
/// Page code 0x0F
/// 16 bytes in SSC-1
/// </summary>
public struct ModePage_0F
{
/// <summary>
/// Parameters can be saved
/// </summary>
public bool PS;
/// <summary>
/// Data compression enabled
/// </summary>
public bool DCE;
/// <summary>
/// Data compression capable
/// </summary>
public bool DCC;
/// <summary>
/// Data decompression enabled
/// </summary>
public bool DDE;
/// <summary>
/// Report exception on decompression
/// </summary>
public byte RED;
/// <summary>
/// Compression algorithm
/// </summary>
public uint CompressionAlgo;
/// <summary>
/// Decompression algorithm
/// </summary>
public uint DecompressionAlgo;
}
public static ModePage_0F? DecodeModePage_0F(byte[] pageResponse)
{
if (pageResponse == null)
return null;
if ((pageResponse[0] & 0x40) == 0x40)
return null;
if ((pageResponse[0] & 0x3F) != 0x0F)
return null;
if (pageResponse[1] + 2 != pageResponse.Length)
return null;
if (pageResponse.Length < 24)
return null;
ModePage_0F decoded = new ModePage_0F();
decoded.PS |= (pageResponse[0] & 0x80) == 0x80;
decoded.DCE |= (pageResponse[2] & 0x80) == 0x80;
decoded.DCC |= (pageResponse[2] & 0x40) == 0x40;
decoded.DDE |= (pageResponse[3] & 0x80) == 0x80;
decoded.RED = (byte)((pageResponse[3] & 0x60) >> 5);
decoded.CompressionAlgo = (uint)((pageResponse[4] << 24) + (pageResponse[5] << 16) + (pageResponse[6] << 8) + pageResponse[7]);
decoded.DecompressionAlgo = (uint)((pageResponse[8] << 24) + (pageResponse[9] << 16) + (pageResponse[10] << 8) + pageResponse[11]);
return decoded;
}
public static string PrettifyModePage_0F(byte[] pageResponse)
{
return PrettifyModePage_0F(DecodeModePage_0F(pageResponse));
}
public static string PrettifyModePage_0F(ModePage_0F? modePage)
{
if (!modePage.HasValue)
return null;
ModePage_0F page = modePage.Value;
StringBuilder sb = new StringBuilder();
sb.AppendLine("SCSI Data compression page:");
if (page.PS)
sb.AppendLine("\tParameters can be saved");
if (page.DCC)
{
sb.AppendLine("\tDrive supports data compression");
if (page.DCE)
{
sb.Append("\tData compression is enabled with ");
switch (page.CompressionAlgo)
{
case 3:
sb.AppendLine("IBM ALDC with 512 byte buffer");
break;
case 4:
sb.AppendLine("IBM ALDC with 1024 byte buffer");
break;
case 5:
sb.AppendLine("IBM ALDC with 2048 byte buffer");
break;
case 0x10:
sb.AppendLine("IBM IDRC");
break;
case 0x20:
sb.AppendLine("DCLZ");
break;
case 0xFF:
sb.AppendLine("an unregistered compression algorithm");
break;
default:
sb.AppendFormat("an unknown algorithm coded {0}", page.CompressionAlgo).AppendLine();
break;
}
}
if (page.DDE)
{
sb.AppendLine("\tData decompression is enabled");
if (page.DecompressionAlgo == 0)
sb.AppendLine("\tLast data read was uncompressed");
else
{
sb.Append("\tLast data read was compressed with ");
switch (page.CompressionAlgo)
{
case 3:
sb.AppendLine("IBM ALDC with 512 byte buffer");
break;
case 4:
sb.AppendLine("IBM ALDC with 1024 byte buffer");
break;
case 5:
sb.AppendLine("IBM ALDC with 2048 byte buffer");
break;
case 0x10:
sb.AppendLine("IBM IDRC");
break;
case 0x20:
sb.AppendLine("DCLZ");
break;
case 0xFF:
sb.AppendLine("an unregistered compression algorithm");
break;
default:
sb.AppendFormat("an unknown algorithm coded {0}", page.CompressionAlgo).AppendLine();
break;
}
}
}
sb.AppendFormat("\tReport exception on compression is set to {0}", page.RED).AppendLine();
}
else
sb.AppendLine("\tDrive does not support data compression");
return sb.ToString();
}
#endregion Mode Page 0x0F: Data compression page
}
}