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115 lines
4.2 KiB
C#
115 lines
4.2 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 DVD 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 © 2011-2023 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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namespace Aaru.Decoders.DVD;
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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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public static SpareAreaInformation? Decode(byte[] response)
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{
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if(response?.Length != 16)
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return null;
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return new SpareAreaInformation
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{
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DataLength = (ushort)((response[0] << 8) + response[1]),
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Reserved1 = response[2],
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Reserved2 = response[3],
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UnusedPrimaryBlocks = (uint)((response[4] << 24) + (response[5] << 16) + (response[6] << 8) + response[7]),
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UnusedSupplementaryBlocks =
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(uint)((response[8] << 24) + (response[9] << 16) + (response[10] << 8) + response[11]),
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AllocatedSupplementaryBlocks =
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(uint)((response[12] << 24) + (response[13] << 16) + (response[14] << 8) + response[15])
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};
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}
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public static string Prettify(SpareAreaInformation? sai)
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{
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if(sai == null)
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return null;
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SpareAreaInformation decoded = sai.Value;
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var sb = new StringBuilder();
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sb.AppendFormat(Localization._0_unused_primary_spare_blocks, decoded.UnusedPrimaryBlocks).AppendLine();
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sb.AppendFormat(Localization._0_unused_supplementary_spare_blocks, decoded.UnusedSupplementaryBlocks).
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AppendLine();
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sb.AppendFormat(Localization._0_allocated_supplementary_spare_blocks, decoded.AllocatedSupplementaryBlocks).
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AppendLine();
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return sb.ToString();
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}
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public static string Prettify(byte[] response) => Prettify(Decode(response));
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#region Nested type: SpareAreaInformation
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public struct SpareAreaInformation
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{
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/// <summary>Bytes 0 to 1 Data length</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 Data length</summary>
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public uint UnusedPrimaryBlocks;
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/// <summary>Bytes 8 to 11 Data length</summary>
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public uint UnusedSupplementaryBlocks;
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/// <summary>Bytes 12 to 15 Data length</summary>
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public uint AllocatedSupplementaryBlocks;
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}
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#endregion
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} |