sdrtrunk/src/module/decode/p25/message/tsbk/GroupChannelGrantExplicit.java

/*******************************************************************************
 * sdrtrunk
 * Copyright (C) 2014-2017 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 module.decode.p25.message.tsbk;

import alias.AliasList;
import bits.BinaryMessage;
import module.decode.p25.message.IBandIdentifier;
import module.decode.p25.reference.DataUnitID;

public abstract class GroupChannelGrantExplicit extends ChannelGrant
{
    public static final int[] TRANSMIT_IDENTIFIER = {96, 97, 98, 99};
    public static final int[] TRANSMIT_NUMBER = {100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111};
    public static final int[] RECEIVE_IDENTIFIER = {112, 113, 114, 115};
    public static final int[] RECEIVE_NUMBER = {116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127};
    public static final int[] GROUP_ADDRESS = {128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141,
        142, 143};

    private IBandIdentifier mTransmitIdentifierUpdate;
    private IBandIdentifier mReceiveIdentifierUpdate;

    public GroupChannelGrantExplicit(BinaryMessage message, DataUnitID duid, AliasList aliasList)
    {
        super(message, duid, aliasList);
    }

    @Override
    public boolean isTDMAChannel()
    {
        if(mTransmitIdentifierUpdate != null)
        {
            return mTransmitIdentifierUpdate.isTDMA();
        }

        return false;
    }

    public String getMessage()
    {
        StringBuilder sb = new StringBuilder();

        sb.append(getMessageStub());

        if(isEmergency())
        {
            sb.append(" EMERGENCY");
        }

        sb.append(" XMIT:");
        sb.append(getTransmitChannelIdentifier() + "/" + getTransmitChannelNumber());

        sb.append(" RCV:");
        sb.append(getReceiveChannelIdentifier() + "/" + getReceiveChannelNumber());

        sb.append(" GRP:");
        sb.append(getGroupAddress());

        return sb.toString();
    }

    public int getTransmitChannelIdentifier()
    {
        return mMessage.getInt(TRANSMIT_IDENTIFIER);
    }

    public int getTransmitChannelNumber()
    {
        return mMessage.getInt(TRANSMIT_NUMBER);
    }

    public String getTransmitChannel()
    {
        return getTransmitChannelIdentifier() + "-" + getTransmitChannelNumber();
    }

    public int getReceiveChannelIdentifier()
    {
        return mMessage.getInt(RECEIVE_IDENTIFIER);
    }

    public int getReceiveChannelNumber()
    {
        return mMessage.getInt(RECEIVE_NUMBER);
    }

    public String getReceiveChannel()
    {
        return getReceiveChannelIdentifier() + "-" + getReceiveChannelNumber();
    }

    public String getGroupAddress()
    {
        return mMessage.getHex(GROUP_ADDRESS, 4);
    }

    @Override
    public void setIdentifierMessage(int identifier, IBandIdentifier message)
    {
        if(identifier == getTransmitChannelIdentifier())
        {
            mTransmitIdentifierUpdate = message;
        }

        if(identifier == getReceiveChannelIdentifier())
        {
            mReceiveIdentifierUpdate = message;
        }
    }

    @Override
    public int[] getIdentifiers()
    {
        int[] identifiers = new int[2];
        identifiers[0] = getTransmitChannelIdentifier();
        identifiers[1] = getReceiveChannelIdentifier();

        return identifiers;
    }

    public long getDownlinkFrequency()
    {
        if(mTransmitIdentifierUpdate != null)
        {
            return mTransmitIdentifierUpdate.getDownlinkFrequency(getTransmitChannelNumber());
        }

        return 0;
    }

    public long getUplinkFrequency()
    {
        if(mReceiveIdentifierUpdate != null)
        {
            return mReceiveIdentifierUpdate.getUplinkFrequency(getReceiveChannelNumber());
        }

        return 0;
    }
}