init

Common/DTS.Common.Serialization/IRIGCH10/Packets/TransportStreamHeader.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DTS.Serialization.IRIGCH10.Packets
+{
+    public class TransportStreamHeader : ITransportStreamHeader
+    {
+        /*•	Transport Stream: 4-byte or 32-bit value.  (Byteswap to PC format.)
+o	Bit [3:0]		4-bit Message Format is set to 1.
+o	Bit [7:4] 	4-bit Message Type is set to 0.
+o	Bit [31:8]	24-bit UDP message sequence number.  It is incremented by 1 for each packet sent out in stream including Time data packet, CGPD (TMATS), and Analog data packets.
+*/
+        private byte[] _bytes = new byte[4];
+        public int MessageFormat { get; }
+        public int MessageType { get; }
+        public int SequenceNumber { get; }
+
+        public TransportStreamHeader()
+        {
+
+        }
+        public TransportStreamHeader(byte[] input)
+        {
+            if (null == input) { throw new NullReferenceException($"input is null"); }
+            if (TRANSPORT_HEADER_LENGTH != input.Length) { throw new Exception($"Expected {TRANSPORT_HEADER_LENGTH} bytes, received {input.Length}"); }
+            Buffer.BlockCopy(input, 0, _bytes, 0, TRANSPORT_HEADER_LENGTH);
+            var int32 = BitConverter.ToInt32(input, 0);
+            var bits = new BitArray(BitConverter.GetBytes(int32));
+            MessageFormat = Utils.Utils.BitArrayToInt32(bits, 0, 3);
+            MessageType = Utils.Utils.BitArrayToInt32(bits, 4, 7);
+            SequenceNumber = Utils.Utils.BitArrayToInt32(bits, 8, 31);
+            _bytes = input;
+        }
+        public const int TRANSPORT_HEADER_LENGTH = 4;
+    }
+}