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DefinedShortDataHeader.java
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DefinedShortDataHeader.java
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/*
* *****************************************************************************
* Copyright (C) 2014-2023 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
* ****************************************************************************
*/
package io.github.dsheirer.module.decode.dmr.message.data.header;
import io.github.dsheirer.bits.CorrectedBinaryMessage;
import io.github.dsheirer.identifier.Identifier;
import io.github.dsheirer.module.decode.dmr.DMRSyncPattern;
import io.github.dsheirer.module.decode.dmr.message.CACH;
import io.github.dsheirer.module.decode.dmr.message.data.SlotType;
import io.github.dsheirer.module.decode.dmr.message.type.DefinedDataFormat;
import java.util.ArrayList;
import java.util.List;
/**
* Defined Short Data Header
*/
public class DefinedShortDataHeader extends PacketSequenceHeader
{
private static final int[] BLOCKS_TO_FOLLOW = new int[]{2, 3, 12, 13, 14, 15};
private static final int[] DEFINED_DATA_FORMAT = new int[]{64, 65, 66, 67, 68, 69};
private static final int RESYNCHRONIZE_FLAG = 70;
private static final int FULL_MESSAGE_FLAG = 71;
private static final int[] BIT_PADDING = new int[]{72, 73, 74, 75, 76, 77, 78, 79};
private static final int[] HEADER_CRC = new int[]{80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95};
private List<Identifier> mIdentifiers;
/**
* Constructs an instance.
*
* @param syncPattern either BASE_STATION_DATA or MOBILE_STATION_DATA
* @param message containing extracted 196-bit payload.
* @param cach for the DMR burst
* @param slotType for this data message
* @param timestamp message was received
* @param timeslot for the DMR burst
*/
public DefinedShortDataHeader(DMRSyncPattern syncPattern, CorrectedBinaryMessage message, CACH cach, SlotType slotType, long timestamp, int timeslot)
{
super(syncPattern, message, cach, slotType, timestamp, timeslot);
}
@Override
public String toString()
{
StringBuilder sb = new StringBuilder();
sb.append("CC:").append(getSlotType().getColorCode());
if(!isValid())
{
sb.append(" [CRC ERROR]");
}
sb.append(isResponseRequested() ? " CONFIRMED" : " UNCONFIRMED");
sb.append(" DEFINED SHORT DATA HEADER");
sb.append(" FM:").append(getSourceLLID());
sb.append(" TO:").append(getDestinationLLID());
sb.append(" FORMAT:").append(getDefinedDataFormat());
sb.append(" ").append(getServiceAccessPoint());
if(isFullMessage())
{
sb.append(" FULL MESSAGE");
}
if(isResynchronize())
{
sb.append(" RESYNCHRONIZE");
}
sb.append(" BIT PADDING:").append(getBitPadding());
sb.append(" BLOCKS TO FOLLOW:").append(getBlocksToFollow());
return sb.toString();
}
/**
* Format for the data payload for this packet sequence.
*/
public DefinedDataFormat getDefinedDataFormat()
{
return DefinedDataFormat.fromValue(getMessage().getInt(DEFINED_DATA_FORMAT));
}
/**
* Indicates if this is a full message
*/
public boolean isFullMessage()
{
return getMessage().get(FULL_MESSAGE_FLAG);
}
/**
* Indicates if this is resynchronized data
*/
public boolean isResynchronize()
{
return getMessage().get((RESYNCHRONIZE_FLAG));
}
/**
* Bit padding value.
*/
public int getBitPadding()
{
return getMessage().getInt(BIT_PADDING);
}
/**
* Number of appended blocks
*/
@Override
public int getBlocksToFollow()
{
return getMessage().getInt(BLOCKS_TO_FOLLOW);
}
@Override
public List<Identifier> getIdentifiers()
{
if(mIdentifiers == null)
{
mIdentifiers = new ArrayList<>();
mIdentifiers.add(getDestinationLLID());
mIdentifiers.add(getSourceLLID());
}
return mIdentifiers;
}
}