P25 work in progress.

Adds parsing of TDULC and LDU1 Link Control messages and LDU1 Low Speed Data ( 16-bit word).

src/decode/p25/message/ldu/lc/NetworkStatusBroadcastExplicit.java

@@ -0,0 +1,131 @@
+package decode.p25.message.ldu.lc;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import decode.p25.message.IdentifierProvider;
+import decode.p25.message.IdentifierReceiver;
+import decode.p25.message.ldu.LDU1Message;
+import decode.p25.reference.LinkControlOpcode;
+
+public class NetworkStatusBroadcastExplicit extends LDU1Message
+									implements IdentifierReceiver
+{
+	private final static Logger mLog = 
+			LoggerFactory.getLogger( NetworkStatusBroadcastExplicit.class );
+	public static final int[] NETWORK_ID = { 364,365,366,367,372,373,374,375,
+		376,377,382,383,384,385,386,387,536,537,538,539 };
+	public static final int[] SYSTEM_ID = { 540,541,546,547,548,549,550,551,556,
+		557,558,559 };
+	public static final int[] TRANSMIT_IDENTIFIER = { 560,561,566,567 };
+	public static final int[] TRANSMIT_CHANNEL = { 568,569,570,571,720,721,722,
+		723,724,725,730,731 };
+	public static final int[] RECEIVE_IDENTIFIER = { 732,733,734,735 };
+	public static final int[] RECEIVE_CHANNEL = { 740,741,742,743,744,745,750,
+		751,752,753,754,755 };
+	
+	private IdentifierProvider mTransmitIdentifierUpdate;
+	private IdentifierProvider mReceiveIdentifierUpdate;
+	
+	public NetworkStatusBroadcastExplicit( LDU1Message message )
+	{
+		super( message );
+	}
+	
+    @Override
+    public String getEventType()
+    {
+        return LinkControlOpcode.NETWORK_STATUS_BROADCAST_EXPLICIT.getDescription();
+    }
+
+	@Override
+	public String getMessage()
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( getMessageStub() );
+
+		sb.append( " NETWORK:" + getNetworkID() );
+		sb.append( " SYS:" + getSystemID() );
+		sb.append( " TRANSMIT:" + getTransmitChannel() );
+		sb.append( " RECEIVE:" + getReceiveChannel() );
+		
+		return sb.toString();
+	}
+	
+	public String getNetworkID()
+	{
+		return mMessage.getHex( NETWORK_ID, 5 );
+	}
+	
+	public String getSystemID()
+	{
+		return mMessage.getHex( SYSTEM_ID, 3 );
+	}
+
+	public int getTransmitIdentifier()
+	{
+		return mMessage.getInt( TRANSMIT_IDENTIFIER );
+	}
+	
+	public int getTransmitChannelNumber()
+	{
+		return mMessage.getInt( TRANSMIT_CHANNEL );
+	}
+	
+	public String getTransmitChannel()
+	{
+		return getTransmitIdentifier() + "-" + getTransmitChannelNumber();
+	}
+	
+	public int getReceiveIdentifier()
+	{
+		return mMessage.getInt( RECEIVE_IDENTIFIER );
+	}
+	
+	public int getReceiveChannelNumber()
+	{
+		return mMessage.getInt( RECEIVE_CHANNEL );
+	}
+	
+	public String getReceiveChannel()
+	{
+		return getReceiveIdentifier() + "-" + getReceiveChannelNumber();
+	}
+
+	@Override
+    public void setIdentifierMessage( int identifier, IdentifierProvider message )
+    {
+		if( identifier == getTransmitIdentifier() )
+		{
+			mTransmitIdentifierUpdate = message;
+		}
+		if( identifier == getReceiveIdentifier() )
+		{
+			mReceiveIdentifierUpdate = message;
+		}
+    }
+
+	@Override
+    public int[] getIdentifiers()
+    {
+	    int[] identifiers = new int[ 2 ];
+	    
+	    identifiers[ 0 ] = getTransmitIdentifier();
+	    identifiers[ 1 ] = getReceiveIdentifier();
+	    
+	    return identifiers;
+    }
+	
+    public long getDownlinkFrequency()
+    {
+    	return calculateDownlink( mTransmitIdentifierUpdate, 
+    				getTransmitChannelNumber() );
+    }
+    
+    public long getUplinkFrequency()
+    {
+    	return calculateUplink( mReceiveIdentifierUpdate, 
+    			getReceiveChannelNumber() );
+    }
+}