Aaru/DiscImageChef.DiscImages/HDCopy/Structs.cs

// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Structs.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains structures for HD-Copy disk images.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library is distributed in the hope that it will be useful, but
//     WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2017 Michael Drüing
// Copyright © 2011-2018 Natalia Portillo
// ****************************************************************************/

using System.Runtime.InteropServices;

namespace DiscImageChef.DiscImages
{
    public partial class HdCopy
    {
        /// <summary>
        ///     The global header of a HDCP image file
        /// </summary>
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        struct HdcpFileHeader
        {
            /// <summary>
            ///     Last cylinder (zero-based)
            /// </summary>
            public byte lastCylinder;

            /// <summary>
            ///     Sectors per track
            /// </summary>
            public byte sectorsPerTrack;

            /// <summary>
            ///     The track map. It contains one byte for each track.
            ///     Up to 82 tracks (41 tracks * 2 sides) are supported.
            ///     0 means track is not present, 1 means it is present.
            ///     The first 2 tracks are always present.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2 * 82)]
            public byte[] trackMap;
        }

        /// <summary>
        ///     The header for a RLE-compressed block
        /// </summary>
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        struct HdcpBlockHeader
        {
            /// <summary>
            ///     The length of the compressed block, in bytes. Little-endian.
            /// </summary>
            public ushort length;

            /// <summary>
            ///     The byte value used as RLE escape sequence
            /// </summary>
            public byte escape;
        }
    }
}