Add mesh reading and conversion support

LibDgf/Ps2/Vif/VifCode.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace LibDgf.Ps2.Vif
+{
+    public struct VifCode
+    {
+        public uint Value;
+
+        public bool Interrupt
+        {
+            get
+            {
+                return (Cmd & VifCodeCmd.Interrupt) != 0;
+            }
+        }
+
+        public VifCodeCmd Cmd
+        {
+            get
+            {
+                return (VifCodeCmd)(byte)(Value >> 24);
+            }
+        }
+
+        public VifCodeCmd CmdWithoutInterrupt
+        {
+            get
+            {
+                return Cmd & ~VifCodeCmd.Interrupt;
+            }
+        }
+
+        public byte Num
+        {
+            get
+            {
+                return (byte)(Value >> 16);
+            }
+        }
+
+        public ushort Immediate
+        {
+            get
+            {
+                return (ushort)Value;
+            }
+        }
+
+        public bool IsUnpack => (Cmd & VifCodeCmd.Unpack) == VifCodeCmd.Unpack;
+    }
+}