 		private function _DecodeDHT():void {
 			var codelen:int, currcnt:int, remain:int, spread:int, i:int, j:int;
 			var counts:ByteArray = new ByteArray();
-            _DecodeLength();
-            while (ctx.length >= 17) {
-            	i = ctx.data.readUnsignedByte();
-            	if (i & 0xEC) { throw new Error(RESULT_SYNTAX_ERROR); }
+			_DecodeLength();
+			while (ctx.length >= 17) {
+				i = ctx.data.readUnsignedByte();
+				if (i & 0xEC) { throw new Error(RESULT_SYNTAX_ERROR); }
 				if (i & 0x02) { throw new Error(RESULT_UNSUPPORTED); }
-				i = (i | (i >> 3)) & 3;  // combined DC/AC + tableid value
+				i = (i | (i >> 3)) & 3;	 // combined DC/AC + tableid value
 				ctx.data.readBytes(counts, 0, 16);
 				_Skip(17);
 				

		
		
		private static const ZZ:Vector.<int> = Vector.<int>([
			 0,  1,  8, 16,  9,  2,  3, 10,
			17, 24, 32, 25, 18, 11,  4,  5,
			12, 19, 26, 33, 40, 48, 41, 34,
			27, 20, 13,  6,  7, 14, 21, 28,
			35, 42, 49, 56, 57, 50, 43, 36,
			29, 22, 15, 23, 30, 37, 44, 51,
			58, 59, 52, 45, 38, 31, 39, 46,


		
		private function _DecodeDRI():void {
			_DecodeLength();
			if (ctx.length < 2) { throw new Error(RESULT_SYNTAX_ERROR); }
			ctx.rstinterval = ctx.data.readUnsignedShort();
			ctx.data.position += ctx.length - 2;
			_Skip(ctx.length);
		}
