hawkeye camera support(not tested)

framework/Inspectron.HawkEye/UDT/SequenceNumber.cs

@@ -0,0 +1,55 @@
+// UDT Sequence Number 0 - (2^31 - 1)
+
+// seqcmp: compare two seq#, considering the wraping
+// seqlen: length from the 1st to the 2nd seq#, including both
+// seqoff: offset from the 2nd to the 1st seq#
+// incseq: increase the seq# by 1
+// decseq: decrease the seq# by 1
+// incseq: increase the seq# by a given offset
+
+using System;
+
+namespace UdtSharp
+{
+    static class SequenceNumber
+    {
+        public static int seqcmp(int seq1, int seq2)
+        { 
+            return (Math.Abs(seq1 - seq2) < m_iSeqNoTH) ? (seq1 - seq2) : (seq2 - seq1);
+        }
+
+        public static int seqlen(int seq1, int seq2)
+        {
+            return (seq1 <= seq2) ? (seq2 - seq1 + 1) : (seq2 - seq1 + m_iMaxSeqNo + 2);
+        }
+
+        public static int seqoff(int seq1, int seq2)
+        {
+            if (Math.Abs(seq1 - seq2) < m_iSeqNoTH)
+                return seq2 - seq1;
+
+            if (seq1 < seq2)
+                return seq2 - seq1 - m_iMaxSeqNo - 1;
+
+            return seq2 - seq1 + m_iMaxSeqNo + 1;
+        }
+
+        public static int incseq(int seq)
+        {
+            return (seq == m_iMaxSeqNo) ? 0 : seq + 1;
+        }
+
+        public static int decseq(int seq)
+        {
+            return (seq == 0) ? m_iMaxSeqNo : seq - 1;
+        }
+
+        public static int incseq(int seq, int inc)
+        {
+            return (m_iMaxSeqNo - seq >= inc) ? seq + inc : seq - m_iMaxSeqNo + inc - 1;
+        }
+
+        public static int m_iSeqNoTH = 0x3FFFFFFF;             // threshold for comparing seq. no.
+        public static int m_iMaxSeqNo = 0x7FFFFFFF;            // maximum sequence number used in UDT
+    }
+}