Begin vqa support; load and display FORM header

OpenRA.FileFormats/Graphics/VqaReader.cs

@@ -0,0 +1,72 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using System.Collections;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System;
+
+namespace OpenRA.FileFormats
+{
+	public class VqaReader
+	{
+		public VqaReader( Stream stream )
+		{
+			BinaryReader reader = new BinaryReader( stream );
+
+			// Decode FORM chunk
+			if (new String(reader.ReadChars(4)) != "FORM")
+				throw new InvalidDataException("Invalid vqa (invalid FORM section)");
+			
+			var fileBTF = reader.ReadUInt32();
+			
+			if (new String(reader.ReadChars(8)) != "WVQAVQHD")
+				throw new InvalidDataException("Invalid vqa (not WVQAVQHD)");
+			
+			var rStartPos = reader.ReadUInt32();
+			var version = reader.ReadUInt16();
+			var flags = reader.ReadUInt16();
+			var numFrames = reader.ReadUInt16();
+			var width = reader.ReadUInt16();
+			var height = reader.ReadUInt16();
+			
+			var blockWidth = reader.ReadByte();
+			var blockHeight = reader.ReadByte();
+			var framerate = reader.ReadByte();
+			var cbParts = reader.ReadByte();
+			
+			var colors = reader.ReadUInt16();
+			var maxBlocks = reader.ReadUInt16();
+			/*var unknown1 = */reader.ReadUInt16();
+			/*var unknown2 = */reader.ReadUInt32();
+			
+			// Audio?
+			var freq = reader.ReadUInt16();
+			var channels = reader.ReadByte();
+			var bits = reader.ReadByte();
+			
+			/*var unknown3 = */reader.ReadChars(14);
+			
+			Console.WriteLine("FORM Info");
+			Console.WriteLine("\tVersion: {0}",version);
+			Console.WriteLine("\tFlags: {0}",flags);
+			Console.WriteLine("\tFrames: {0}",numFrames);
+			Console.WriteLine("\tFramerate: {0}",framerate);
+			Console.WriteLine("\tSize: {0}x{1}",width,height);
+			Console.WriteLine("\tBlocksize: {0}x{1}",blockWidth,blockHeight);
+			Console.WriteLine("\tAudio: {0}hz, {1} channel(s), {2} bit",freq, channels, bits);
+
+			// The next section should be the first FINF chunk
+			if (new String(reader.ReadChars(4)) != "FINF")
+				throw new InvalidDataException("Invalid vqa (invalid FINF section)");
+		}
+	}
+}