mirror of
https://github.com/DSheirer/sdrtrunk.git
synced 2026-11-12 08:37:25 -05:00
83 lines
2.3 KiB
Java
83 lines
2.3 KiB
Java
package decode.p25.message.ldu;
|
|
|
|
import alias.AliasList;
|
|
import bits.BitSetBuffer;
|
|
import decode.p25.P25Interleave;
|
|
import decode.p25.message.P25Message;
|
|
import decode.p25.reference.DataUnitID;
|
|
import edac.CRC;
|
|
|
|
public class LDUMessage extends P25Message
|
|
{
|
|
public static final int IMBE_1 = 64;
|
|
public static final int IMBE_2 = 208;
|
|
public static final int IMBE_3 = 392;
|
|
public static final int IMBE_4 = 576;
|
|
public static final int IMBE_5 = 760;
|
|
public static final int IMBE_6 = 944;
|
|
public static final int IMBE_7 = 1128;
|
|
public static final int IMBE_8 = 1312;
|
|
public static final int IMBE_9 = 1488;
|
|
|
|
public static final int[] LOW_SPEED_DATA = { 1456,1457,1458,1459,1460,1461,
|
|
1462,1463,1472,1473,1474,1475,1476,1477,1478,1479 };
|
|
|
|
public LDUMessage( BitSetBuffer message, DataUnitID duid,
|
|
AliasList aliasList )
|
|
{
|
|
super( message, duid, aliasList );
|
|
|
|
deinterleaveVoiceFrames();
|
|
|
|
/* NID CRC is checked in the message framer, thus a constructed message
|
|
* means it passed the CRC */
|
|
mCRC = new CRC[ 2 ];
|
|
mCRC[ 0 ] = CRC.PASSED;
|
|
}
|
|
|
|
@Override
|
|
public String getMessage()
|
|
{
|
|
return getMessageStub();
|
|
}
|
|
|
|
public String getMessageStub()
|
|
{
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
sb.append( "NAC:" );
|
|
sb.append( getNAC() );
|
|
sb.append( " " );
|
|
sb.append( getDUID().getLabel() );
|
|
sb.append( " LSD:" );
|
|
sb.append( getLowSpeedData() );
|
|
sb.append( " " );
|
|
|
|
return sb.toString();
|
|
}
|
|
|
|
public String getLowSpeedData()
|
|
{
|
|
return mMessage.getHex( LOW_SPEED_DATA, 4 );
|
|
}
|
|
|
|
private void deinterleaveVoiceFrames()
|
|
{
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_1, IMBE_1 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_2, IMBE_2 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_3, IMBE_3 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_4, IMBE_4 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_5, IMBE_5 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_6, IMBE_6 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_7, IMBE_7 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_8, IMBE_8 + 144 );
|
|
P25Interleave.deinterleaveVoice( mMessage, IMBE_9, IMBE_9 + 144 );
|
|
}
|
|
|
|
/* Temporary override */
|
|
public boolean isValid()
|
|
{
|
|
return true;
|
|
}
|
|
}
|