164 lines
4.7 KiB
C#
164 lines
4.7 KiB
C#
using System;
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using System.Collections;
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using System.Text;
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using System.Diagnostics;
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using log4net;
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namespace bsmd.AIS2Service
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{
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/// <summary>
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/// Diese Nachricht wird normalerweise von Class B Geräten nicht verschickt.
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/// Sie wird nur als Antwort auf einen sog. "Base station poll" gesendet.
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/// Wir lesen sie trotzdem ;)
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/// </summary>
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// Todo
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internal class AIS_ClassBExt : AISClass
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{
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#region private members
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private int repeatIndicator;
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private int spare1;
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private int sog;
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private int accuracy;
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private int longitude;
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private int latitude;
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private int cog;
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private int trueHeading;
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private int utcTimestampSecond;
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private DateTime timestamp;
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private int spare2;
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private string name;
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private int shipType;
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private int dimension;
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private int typeofDevice;
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private int raimFlag;
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private int dte;
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private int assignedMode;
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private int spare3;
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private static ILog _log = LogManager.GetLogger(typeof(AIS_ClassBExt));
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#endregion
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#region Properties
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public string Name
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{
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get { return this.name; }
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}
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public DateTime Timestamp
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{
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get { return this.timestamp; }
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}
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public double Latitude
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{
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get { return this.latitude / 600000.0f; }
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}
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public double Longitude
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{
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get { return this.longitude / 600000.0f; }
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}
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public int TrueHeading
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{
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get { return this.trueHeading; }
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}
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public double Cog
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{
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get { return (double)this.cog / 10.0f; }
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}
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public double Sog
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{
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get { return (double)this.sog / 10.0f; }
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}
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public int Accuracy
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{
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get { return this.accuracy; }
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}
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public int ShipType
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{
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get { return this.shipType; }
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}
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public int Length { get; private set; }
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public int Breadth { get; private set; }
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public int DTE { get { return dte; } }
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public int RAIM { get { return raimFlag; } }
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#endregion
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protected override Status Decode()
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{
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BitArray bits = DecodeBinary(_data);
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Status result = Status.OK;
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try
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{
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int type = GetInt(bits, 0, 5);
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if (type != 19)
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{
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result = Status.ILLEGAL_ARGUMENT;
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}
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else
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{
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this.repeatIndicator = GetInt(bits, 6, 7);
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_mmsi = GetInt(bits, 8, 37);
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this.spare1 = GetInt(bits, 38, 45);
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this.sog = GetInt(bits, 46, 55);
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this.accuracy = GetInt(bits, 56, 56);
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this.longitude = GetInt(bits, 57, 84);
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this.latitude = GetInt(bits, 85, 111);
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this.cog = GetInt(bits, 112, 123);
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this.trueHeading = GetInt(bits, 124, 132);
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this.utcTimestampSecond = GetInt(bits, 133, 138);
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this.timestamp = DateTime.Now;
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this.spare2 = GetInt(bits, 139, 142);
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StringBuilder sb_name = new StringBuilder(20);
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for (int i = 0; i < 20; i++)
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{
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int cval = GetInt(bits, 143 + (6 * i), 148 + (6 * i));
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char ch = GetAISChar(cval);
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if (ch == '@') ch = ' ';
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sb_name.Append(ch);
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}
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this.name = sb_name.ToString().Trim();
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this.shipType = GetInt(bits, 263, 270);
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this.dimension = GetInt(bits, 271, 300);
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int toBow = GetInt(bits, 271, 279);
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int toStern = GetInt(bits, 280, 288);
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this.Length = toBow + toStern;
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int toPort = GetInt(bits, 289, 294);
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int toStarboard = GetInt(bits, 295, 300);
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this.Breadth = toPort + toStarboard;
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this.typeofDevice = GetInt(bits, 301, 304);
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this.raimFlag = GetInt(bits, 305, 305);
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this.dte = GetInt(bits, 306, 306);
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this.assignedMode = GetInt(bits, 307, 307);
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this.spare3 = GetInt(bits, 308, 311);
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}
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}
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catch (Exception e)
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{
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_log.WarnFormat("Error decoding AIS class B Ext posreport: {0}", e.Message);
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result = Status.PARSE_ERROR;
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}
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return result;
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}
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}
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}
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