Revert "Remove DvdLib (#9068)"

This reverts commit db1913b08fac0749133634efebd1ee7a7876147a.

1 files changed, 121 insertions, 0 deletions

diff --git a/DvdLib/Ifo/ProgramChain.cs b/DvdLib/Ifo/ProgramChain.cs
new file mode 100644
index 000000000..83c0051b9
--- /dev/null
+++ b/DvdLib/Ifo/ProgramChain.cs
@@ -0,0 +1,121 @@
+#pragma warning disable CS1591
+
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace DvdLib.Ifo
+{
+    public enum ProgramPlaybackMode
+    {
+        Sequential,
+        Random,
+        Shuffle
+    }
+
+    public class ProgramChain
+    {
+        private byte _programCount;
+        public readonly List<Program> Programs;
+
+        private byte _cellCount;
+        public readonly List<Cell> Cells;
+
+        public DvdTime PlaybackTime { get; private set; }
+
+        public UserOperation ProhibitedUserOperations { get; private set; }
+
+        public byte[] AudioStreamControl { get; private set; } // 8*2 entries
+        public byte[] SubpictureStreamControl { get; private set; } // 32*4 entries
+
+        private ushort _nextProgramNumber;
+
+        private ushort _prevProgramNumber;
+
+        private ushort _goupProgramNumber;
+
+        public ProgramPlaybackMode PlaybackMode { get; private set; }
+
+        public uint ProgramCount { get; private set; }
+
+        public byte StillTime { get; private set; }
+
+        public byte[] Palette { get; private set; } // 16*4 entries
+
+        private ushort _commandTableOffset;
+
+        private ushort _programMapOffset;
+        private ushort _cellPlaybackOffset;
+        private ushort _cellPositionOffset;
+
+        public readonly uint VideoTitleSetIndex;
+
+        internal ProgramChain(uint vtsPgcNum)
+        {
+            VideoTitleSetIndex = vtsPgcNum;
+            Cells = new List<Cell>();
+            Programs = new List<Program>();
+        }
+
+        internal void ParseHeader(BinaryReader br)
+        {
+            long startPos = br.BaseStream.Position;
+
+            br.ReadUInt16();
+            _programCount = br.ReadByte();
+            _cellCount = br.ReadByte();
+            PlaybackTime = new DvdTime(br.ReadBytes(4));
+            ProhibitedUserOperations = (UserOperation)br.ReadUInt32();
+            AudioStreamControl = br.ReadBytes(16);
+            SubpictureStreamControl = br.ReadBytes(128);
+
+            _nextProgramNumber = br.ReadUInt16();
+            _prevProgramNumber = br.ReadUInt16();
+            _goupProgramNumber = br.ReadUInt16();
+
+            StillTime = br.ReadByte();
+            byte pbMode = br.ReadByte();
+            if (pbMode == 0)
+            {
+                PlaybackMode = ProgramPlaybackMode.Sequential;
+            }
+            else
+            {
+                PlaybackMode = ((pbMode & 0x80) == 0) ? ProgramPlaybackMode.Random : ProgramPlaybackMode.Shuffle;
+            }
+
+            ProgramCount = (uint)(pbMode & 0x7F);
+
+            Palette = br.ReadBytes(64);
+            _commandTableOffset = br.ReadUInt16();
+            _programMapOffset = br.ReadUInt16();
+            _cellPlaybackOffset = br.ReadUInt16();
+            _cellPositionOffset = br.ReadUInt16();
+
+            // read position info
+            br.BaseStream.Seek(startPos + _cellPositionOffset, SeekOrigin.Begin);
+            for (int cellNum = 0; cellNum < _cellCount; cellNum++)
+            {
+                var c = new Cell();
+                c.ParsePosition(br);
+                Cells.Add(c);
+            }
+
+            br.BaseStream.Seek(startPos + _cellPlaybackOffset, SeekOrigin.Begin);
+            for (int cellNum = 0; cellNum < _cellCount; cellNum++)
+            {
+                Cells[cellNum].ParsePlayback(br);
+            }
+
+            br.BaseStream.Seek(startPos + _programMapOffset, SeekOrigin.Begin);
+            var cellNumbers = new List<int>();
+            for (int progNum = 0; progNum < _programCount; progNum++) cellNumbers.Add(br.ReadByte() - 1);
+
+            for (int i = 0; i < cellNumbers.Count; i++)
+            {
+                int max = (i + 1 == cellNumbers.Count) ? _cellCount : cellNumbers[i + 1];
+                Programs.Add(new Program(Cells.Where((c, idx) => idx >= cellNumbers[i] && idx < max).ToList()));
+            }
+        }
+    }
+}