mirror of
https://github.com/aaru-dps/Aaru.git
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140 lines
4.8 KiB
C#
140 lines
4.8 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Spare.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Device structures decoders.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Decodes Blu-ray Spare Area Information.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System.Diagnostics.CodeAnalysis;
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using System.Text;
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using Aaru.Helpers;
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using Aaru.Logging;
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namespace Aaru.Decoders.Bluray;
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// Information from the following standards:
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// ANSI X3.304-1997
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// T10/1048-D revision 9.0
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// T10/1048-D revision 10a
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// T10/1228-D revision 7.0c
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// T10/1228-D revision 11a
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// T10/1363-D revision 10g
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// T10/1545-D revision 1d
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// T10/1545-D revision 5
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// T10/1545-D revision 5a
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// T10/1675-D revision 2c
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// T10/1675-D revision 4
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// T10/1836-D revision 2g
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[SuppressMessage("ReSharper", "InconsistentNaming")]
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[SuppressMessage("ReSharper", "MemberCanBeInternal")]
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[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
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[SuppressMessage("ReSharper", "NotAccessedField.Global")]
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public static class Spare
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{
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const string MODULE_NAME = "BD Spare Area Information decoder";
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#region Nested type: SpareAreaInformation
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#region Public structures
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public struct SpareAreaInformation
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{
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/// <summary>Bytes 0 to 1 Always 14</summary>
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public ushort DataLength;
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/// <summary>Byte 2 Reserved</summary>
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public byte Reserved1;
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/// <summary>Byte 3 Reserved</summary>
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public byte Reserved2;
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/// <summary>Bytes 4 to 7 Reserved</summary>
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public uint Reserved3;
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/// <summary>Bytes 8 to 11 Free spare blocks</summary>
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public uint FreeSpareBlocks;
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/// <summary>Bytes 12 to 15 Allocated spare blocks</summary>
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public uint AllocatedSpareBlocks;
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}
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#endregion Public structures
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#endregion
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#region Public methods
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public static SpareAreaInformation? Decode(byte[] SAIResponse)
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{
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if(SAIResponse == null) return null;
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if(SAIResponse.Length != 16)
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{
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AaruLogging.Debug(MODULE_NAME,
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Localization.Spare_Decode_Found_incorrect_Blu_ray_Spare_Area_Information_size_0_bytes,
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SAIResponse.Length);
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return null;
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}
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var decoded = new SpareAreaInformation
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{
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DataLength = BigEndianBitConverter.ToUInt16(SAIResponse, 0),
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Reserved1 = SAIResponse[2],
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Reserved2 = SAIResponse[3],
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Reserved3 = BigEndianBitConverter.ToUInt32(SAIResponse, 4),
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FreeSpareBlocks = BigEndianBitConverter.ToUInt32(SAIResponse, 8),
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AllocatedSpareBlocks = BigEndianBitConverter.ToUInt32(SAIResponse, 12)
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};
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return decoded;
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}
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public static string Prettify(SpareAreaInformation? SAIResponse)
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{
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if(SAIResponse == null) return null;
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SpareAreaInformation response = SAIResponse.Value;
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var sb = new StringBuilder();
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#if DEBUG
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if(response.Reserved1 != 0)
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sb.AppendFormat(Localization.Reserved1_equals_0_X8, response.Reserved1).AppendLine();
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if(response.Reserved2 != 0)
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sb.AppendFormat(Localization.Reserved2_equals_0_X8, response.Reserved2).AppendLine();
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if(response.Reserved3 != 0)
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sb.AppendFormat(Localization.Reserved3_equals_0_X8, response.Reserved3).AppendLine();
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#endif
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sb.AppendFormat(Localization._0_free_spare_blocks, response.FreeSpareBlocks).AppendLine();
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sb.AppendFormat(Localization._0_allocated_spare_blocks, response.AllocatedSpareBlocks).AppendLine();
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return sb.ToString();
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}
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public static string Prettify(byte[] SAIResponse) => Prettify(Decode(SAIResponse));
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#endregion Public methods
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} |