initial commit

ImageReader/DiscSectors/CDROMFrameHeaderConverter.cs

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+// Decompiled with JetBrains decompiler
+// Type: ImageReader.DiscSectors.CDROMFrameHeaderConverter
+// Assembly: ImageReader, Version=1.5.2.0, Culture=neutral, PublicKeyToken=611be24fdeb07e08
+// MVID: E0717604-B50B-4CB4-B85C-C17F43D5C04B
+// Assembly location: ImageReader.dll
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+
+namespace ImageReader.DiscSectors
+{
+  public class CDROMFrameHeaderConverter
+  {
+    public static readonly ushort CDROM_FRAME_HEADER_SIZE = 16;
+    private static readonly byte[] CDROM_FRAME_HEADER_SYNC = new byte[12]
+    {
+      (byte) 0,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      byte.MaxValue,
+      (byte) 0
+    };
+
+    public static CDROMDataModeType ToCDROMFrameHeader(
+      byte[] buffer,
+      int startIndex)
+    {
+      if (buffer.Length < startIndex + (int) CDROMFrameHeaderConverter.CDROM_FRAME_HEADER_SIZE)
+        throw new ArgumentOutOfRangeException();
+      GCHandle gcHandle = GCHandle.Alloc((object) buffer, GCHandleType.Pinned);
+      CDROMFrameHeaderConverter.CDROMFrameHeader structure = (CDROMFrameHeaderConverter.CDROMFrameHeader) Marshal.PtrToStructure(gcHandle.AddrOfPinnedObject(), typeof (CDROMFrameHeaderConverter.CDROMFrameHeader));
+      gcHandle.Free();
+      if (((IEnumerable<byte>) CDROMFrameHeaderConverter.CDROM_FRAME_HEADER_SYNC).Where<byte>((Func<byte, int, bool>) ((t, i) => (int) t != (int) buffer[i])).Any<byte>())
+        throw new FormatException();
+      return Enum.IsDefined(typeof (CDROMDataModeType), (object) structure.Mode) ? structure.Mode : throw new FormatException();
+    }
+
+    [StructLayout(LayoutKind.Explicit, Size = 16)]
+    private struct CDROMFrameHeader
+    {
+      [FieldOffset(0)]
+      public byte Sync;
+      [FieldOffset(12)]
+      public byte Address;
+      [FieldOffset(15)]
+      public CDROMDataModeType Mode;
+    }
+  }
+}