SabreTools/SabreTools.Serialization
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Add static readers for CD-ROM sector types

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Matt Nadareski
2025-11-05 09:37:56 -05:00
parent a269edd6ea
commit eaabd2ee77
3 changed files with 99 additions and 2 deletions
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2
SabreTools.Serialization/Models/CDROM/Mode1.cs
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@@ -22,7 +22,7 @@ namespace SabreTools.Data.Models.CDROM
public byte[] Intermediate { get; set; } = new byte[8];
/// <summary>
/// Error Correction Code, 4 bytes
/// Error Correction Code, 276 bytes
/// </summary>
public byte[] ECC { get; set; } = new byte[276];
}

2
SabreTools.Serialization/Models/CDROM/Mode2Form1.cs
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@@ -22,7 +22,7 @@ namespace SabreTools.Data.Models.CDROM
public byte[] EDC { get; set; } = new byte[4];
/// <summary>
/// Error Correction Code, 4 bytes
/// Error Correction Code, 276 bytes
/// </summary>
public byte[] ECC { get; set; } = new byte[276];
}

97
SabreTools.Serialization/Readers/CDROM.cs Normal file
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@@ -0,0 +1,97 @@
using System.IO;
using SabreTools.Data.Extensions;
using SabreTools.Data.Models.CDROM;
using SabreTools.IO.Extensions;
namespace SabreTools.Serialization.Readers
{
/// <summary>
/// This intentionally does not inherit from <see cref="BaseBinaryReader"/>
/// </summary>
public class CDROM
{
/// <summary>
/// Parse a Stream into a DataSector
/// </summary>
/// <param name="data">Stream to parse</param>
/// <returns>Filled DataSector on success, null on error</returns>
/// <remarks>Assumes a seekable stream</remarks>
public static DataSector? ParseDataSector(Stream data)
{
SectorMode sectorMode = data.GetSectorMode();
return sectorMode switch
{
SectorMode.MODE0 => null, // TODO: Create data sector for Mode0
SectorMode.MODE1 => ParseMode1(data),
SectorMode.MODE2 => null, // TODO: Create a data sector for Mode2 formless
SectorMode.MODE2_FORM1 => ParseMode2Form1(data),
SectorMode.MODE2_FORM2 => ParseMode2Form2(data),
SectorMode.UNKNOWN => null,
_ => null,
};
}
/// <summary>
/// Parse a Stream into a Mode1
/// </summary>
/// <param name="data">Stream to parse</param>
/// <returns>Filled Mode1 on success, null on error</returns>
public static Mode1 ParseMode1(Stream data)
{
var obj = new Mode1();
obj.SyncPattern = data.ReadBytes(12);
obj.Address = data.ReadBytes(3);
obj.Mode = data.ReadByteValue();
obj.UserData = data.ReadBytes(2048);
obj.EDC = data.ReadBytes(4);
obj.Intermediate = data.ReadBytes(8);
obj.ECC = data.ReadBytes(276);
return obj;
}
/// <summary>
/// Parse a Stream into a Mode2Form1
/// </summary>
/// <param name="data">Stream to parse</param>
/// <returns>Filled Mode2Form1 on success, null on error</returns>
public static Mode2Form1 ParseMode2Form1(Stream data)
{
var obj = new Mode2Form1();
obj.SyncPattern = data.ReadBytes(12);
obj.Address = data.ReadBytes(3);
obj.Mode = data.ReadByteValue();
obj.Subheader = data.ReadBytes(8);
obj.UserData = data.ReadBytes(2048);
obj.EDC = data.ReadBytes(4);
obj.ECC = data.ReadBytes(276);
return obj;
}
/// <summary>
/// Parse a Stream into a Mode2Form2
/// </summary>
/// <param name="data">Stream to parse</param>
/// <returns>Filled Mode2Form2 on success, null on error</returns>
public static Mode2Form2 ParseMode2Form2(Stream data)
{
var obj = new Mode2Form2();
obj.SyncPattern = data.ReadBytes(12);
obj.Address = data.ReadBytes(3);
obj.Mode = data.ReadByteValue();
obj.Subheader = data.ReadBytes(8);
obj.UserData = data.ReadBytes(2324);
obj.EDC = data.ReadBytes(4);
return obj;
}
}
}