hawkeye camera support(not tested)

framework/Inspectron.HawkEye/RTSP/Sdp/AttributRtpMap.cs

@@ -0,0 +1,76 @@
+using System;
+
+namespace Inspectron.HawkEye.RTSP.Sdp
+{
+    public class AttributRtpMap : Attribut
+    {
+        // Format
+        //   rtpmap:<payload type> <encoding name>/<clock rate> [/<encoding parameters>] 
+        // Examples
+        //   rtpmap:96 H264/90000
+        //   rtpmap:8 PCMA/8000
+
+        public const string NAME = "rtpmap";
+
+        public AttributRtpMap()
+        {
+        }
+
+        public override string Key
+        {
+            get
+            {
+                return NAME;
+            }
+        }
+
+        public override string Value
+        {
+            get
+            {
+                if(string.IsNullOrEmpty(EncodingParameters))
+                {
+                    return string.Format("{0} {1}/{2}", PayloadNumber, EncodingName, ClockRate);
+                } else {
+                    return string.Format("{0} {1}/{2}/{3}", PayloadNumber, EncodingName, ClockRate, EncodingParameters);
+                }
+            }
+            protected set
+            {
+                ParseValue(value);
+            }
+        }
+
+        public int PayloadNumber { get; set; }
+        public String EncodingName { get; set; }
+        public String ClockRate { get; set; }
+        public String EncodingParameters { get; set; }
+
+        protected override void ParseValue(string value)
+        {
+            var parts = value.Split(new char[] { ' ', '/' });
+
+            if (parts.Length >= 1) {
+                int tmp_payloadNumber;
+                if (int.TryParse(parts[0], out tmp_payloadNumber))
+                {
+                    PayloadNumber = tmp_payloadNumber;
+                }
+            }
+            if (parts.Length >= 2)
+            {
+                EncodingName = parts[1];
+            }
+            if (parts.Length >= 3)
+            {
+                ClockRate = parts[2];
+            }
+            if (parts.Length >= 4)
+            {
+                EncodingParameters = parts[3];
+            }
+
+
+        }
+    }
+}