Add CD-i Ready detection on media-info.

DiscImageChef.Core/Media/Detection/MMC.cs

@@ -0,0 +1,65 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : MMC.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Core.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Detects media types in MultiMediaCommand devices
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program 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 General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+using System;
+using System.Linq;
+
+namespace DiscImageChef.Core.Media.Detection
+{
+    public static class MMC
+    {
+        /// <summary>
+        ///     Checks if the media corresponds to CD-i.
+        /// </summary>
+        /// <param name="sector0">Contents of LBA 0, with all headers.</param>
+        /// <param name="sector16">Contents of LBA 0, with all headers.</param>
+        /// <returns><c>true</c> if it corresponds to a CD-i, <c>false</c>otherwise.</returns>
+        public static bool IsCdi(byte[] sector0, byte[] sector16)
+        {
+            if(sector0?.Length != 2352 || sector16?.Length != 2352) return false;
+
+            byte[] syncMark = {0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00};
+            byte[] cdiMark  = {0x01, 0x43, 0x44, 0x2D};
+            byte[] testMark = new byte[12];
+            Array.Copy(sector0, 0, testMark, 0, 12);
+
+            bool hiddenData = syncMark.SequenceEqual(testMark) &&
+                              (sector0[0xF] == 0 || sector0[0xF] == 1 || sector0[0xF] == 2);
+
+            if(!hiddenData || sector0[0xF] != 2) return false;
+
+            testMark = new byte[4];
+            Array.Copy(sector16, 24, testMark, 0, 4);
+            return cdiMark.SequenceEqual(testMark);
+        }
+    }
+}