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65 lines
2.6 KiB
C#
65 lines
2.6 KiB
C#
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : MMC.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Core.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Detects media types in MultiMediaCommand devices
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Linq;
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namespace DiscImageChef.Core.Media.Detection
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{
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public static class MMC
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{
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/// <summary>
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/// Checks if the media corresponds to CD-i.
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/// </summary>
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/// <param name="sector0">Contents of LBA 0, with all headers.</param>
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/// <param name="sector16">Contents of LBA 0, with all headers.</param>
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/// <returns><c>true</c> if it corresponds to a CD-i, <c>false</c>otherwise.</returns>
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public static bool IsCdi(byte[] sector0, byte[] sector16)
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{
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if(sector0?.Length != 2352 || sector16?.Length != 2352) return false;
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byte[] syncMark = {0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00};
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byte[] cdiMark = {0x01, 0x43, 0x44, 0x2D};
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byte[] testMark = new byte[12];
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Array.Copy(sector0, 0, testMark, 0, 12);
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bool hiddenData = syncMark.SequenceEqual(testMark) &&
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(sector0[0xF] == 0 || sector0[0xF] == 1 || sector0[0xF] == 2);
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if(!hiddenData || sector0[0xF] != 2) return false;
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testMark = new byte[4];
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Array.Copy(sector16, 24, testMark, 0, 4);
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return cdiMark.SequenceEqual(testMark);
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}
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}
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}
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