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205
Aaru.Decoders/SCSI/MMC/Hybrid.cs
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205
Aaru.Decoders/SCSI/MMC/Hybrid.cs
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// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Hybrid.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 SCSI MMC hybrid structures.
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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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using Aaru.Helpers;
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namespace Aaru.Decoders.SCSI.MMC;
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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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[SuppressMessage("ReSharper", "UnusedMember.Global")]
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[SuppressMessage("ReSharper", "UnusedType.Global")]
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public static class Hybrid
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{
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public static RecognizedFormatLayers? DecodeFormatLayers(byte[] FormatLayersResponse)
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{
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if(FormatLayersResponse == null)
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return null;
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if(FormatLayersResponse.Length < 8)
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return null;
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var decoded = new RecognizedFormatLayers
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{
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DataLength = BigEndianBitConverter.ToUInt16(FormatLayersResponse, 0),
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Reserved1 = FormatLayersResponse[2],
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Reserved2 = FormatLayersResponse[3],
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NumberOfLayers = FormatLayersResponse[4],
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Reserved3 = (byte)((FormatLayersResponse[5] & 0xC0) >> 6),
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DefaultFormatLayer = (byte)((FormatLayersResponse[5] & 0x30) >> 4),
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Reserved4 = (byte)((FormatLayersResponse[5] & 0x0C) >> 2),
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OnlineFormatLayer = (byte)(FormatLayersResponse[5] & 0x03),
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FormatLayers = new ushort[(FormatLayersResponse.Length - 6) / 2]
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};
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for(var i = 0; i < (FormatLayersResponse.Length - 6) / 2; i++)
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decoded.FormatLayers[i] = BigEndianBitConverter.ToUInt16(FormatLayersResponse, i * 2 + 6);
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return decoded;
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}
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public static string PrettifyFormatLayers(RecognizedFormatLayers? FormatLayersResponse)
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{
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if(FormatLayersResponse == null)
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return null;
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RecognizedFormatLayers response = FormatLayersResponse.Value;
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var sb = new StringBuilder();
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sb.AppendFormat(Localization._0_format_layers_recognized, response.NumberOfLayers);
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for(var i = 0; i < response.FormatLayers.Length; i++)
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{
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switch(response.FormatLayers[i])
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{
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case (ushort)FormatLayerTypeCodes.BDLayer:
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{
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sb.AppendFormat(Localization.Layer_0_is_of_type_Blu_ray, i).AppendLine();
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if(response.DefaultFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_default_layer);
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if(response.OnlineFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_layer_actually_in_use);
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break;
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}
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case (ushort)FormatLayerTypeCodes.CDLayer:
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{
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sb.AppendFormat(Localization.Layer_0_is_of_type_CD, i).AppendLine();
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if(response.DefaultFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_default_layer);
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if(response.OnlineFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_layer_actually_in_use);
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break;
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}
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case (ushort)FormatLayerTypeCodes.DVDLayer:
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{
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sb.AppendFormat(Localization.Layer_0_is_of_type_DVD, i).AppendLine();
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if(response.DefaultFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_default_layer);
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if(response.OnlineFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_layer_actually_in_use);
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break;
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}
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case (ushort)FormatLayerTypeCodes.HDDVDLayer:
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{
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sb.AppendFormat(Localization.Layer_0_is_of_type_HD_DVD, i).AppendLine();
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if(response.DefaultFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_default_layer);
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if(response.OnlineFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_layer_actually_in_use);
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break;
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}
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default:
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{
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sb.AppendFormat(Localization.Layer_0_is_of_unknown_type_1, i, response.FormatLayers[i]).
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AppendLine();
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if(response.DefaultFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_default_layer);
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if(response.OnlineFormatLayer == i)
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sb.AppendLine(Localization.This_is_the_layer_actually_in_use);
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break;
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}
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}
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}
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return sb.ToString();
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}
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public static string PrettifyFormatLayers(byte[] FormatLayersResponse)
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{
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RecognizedFormatLayers? decoded = DecodeFormatLayers(FormatLayersResponse);
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return PrettifyFormatLayers(decoded);
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}
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#region Nested type: RecognizedFormatLayers
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public struct RecognizedFormatLayers
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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>Byte 4 Number of format layers in hybrid disc identified by drive</summary>
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public byte NumberOfLayers;
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/// <summary>Byte 5, bits 7 to 6 Reserved</summary>
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public byte Reserved3;
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/// <summary>Byte 5, bits 5 to 4 Layer no. used when disc is inserted</summary>
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public byte DefaultFormatLayer;
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/// <summary>Byte 5, bits 3 to 2 Reserved</summary>
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public byte Reserved4;
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/// <summary>Byte 5, bits 1 to 0 Layer no. currently in use</summary>
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public byte OnlineFormatLayer;
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/// <summary>Bytes 6 to end Recognized format layers</summary>
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public ushort[] FormatLayers;
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}
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#endregion
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}
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