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DataMessage.java
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DataMessage.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;
import io.github.dsheirer.bits.CorrectedBinaryMessage;
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.DMRBurst;
/**
* Base DMR Data Message
*/
public abstract class DataMessage extends DMRBurst
{
//R2, R1, R0 extracted from the BPTC extraction process. Note: message length remains at 96, even though these 3x bits
//are set at the end of the message.
private static final int[] BPTC_RESERVED_BITS = new int[]{96, 97, 98};
private SlotType mSlotType;
/**
* 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 DataMessage(DMRSyncPattern syncPattern, CorrectedBinaryMessage message, CACH cach, SlotType slotType,
long timestamp, int timeslot)
{
super(syncPattern, message, cach, timestamp, timeslot);
mSlotType = slotType;
}
/**
* Slot Type identifies the color code and data type for this data message
*/
public SlotType getSlotType()
{
return mSlotType;
}
/**
* 3x reserved bits that are left-over from the BPTC encode/decode process that can be used to hold values like
* Moto RAS indicator. These message length from the BPTC decoder is set to 96 and these 3x bits are appended to
* the end. However, to keep the message.toString() correct, we specify the length as 96.
* @return reserved value.
*/
public int getBPTCReservedBits()
{
return getMessage().getInt(BPTC_RESERVED_BITS);
}
/**
* Indicates if the BPTC reserved bits value is anything other than 0.
* @return true if non-zero.
*/
public boolean hasRAS()
{
return getBPTCReservedBits() != 0;
}
}