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#296 APCO25 Phase II Decoder Implementation (#589)

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P25 Phase 2 Decoder implementation.
This commit is contained in:
Denny Sheirer
2019-11-17 06:56:52 -05:00
committed by GitHub
parent d5b802e794
commit f934676bd0
561 changed files with 35609 additions and 6215 deletions
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214
src/main/java/io/github/dsheirer/channel/state/StateMachine.java Normal file
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/*
*
* * ******************************************************************************
* * Copyright (C) 2014-2019 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.channel.state;
import io.github.dsheirer.controller.channel.Channel;
import io.github.dsheirer.identifier.IdentifierUpdateNotification;
import io.github.dsheirer.identifier.decoder.ChannelStateIdentifier;
import io.github.dsheirer.sample.Listener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
public class StateMachine
{
private final static Logger mLog = LoggerFactory.getLogger(StateMachine.class);
protected State mState = State.IDLE;
protected long mFadeTimeout;
protected long mFadeTimeoutBuffer = 0;
protected long mEndTimeout;
protected long mEndTimeoutBuffer = 0;
private int mTimeslot;
private Channel.ChannelType mChannelType = Channel.ChannelType.STANDARD;
private List<IStateMachineListener> mStateMachineListeners = new ArrayList<>();
private Listener<IdentifierUpdateNotification> mIdentifierUpdateListener;
public StateMachine(int timeslot)
{
mTimeslot = timeslot;
}
public void addListener(IStateMachineListener listener)
{
mStateMachineListeners.add(listener);
}
public void removeListener(IStateMachineListener listener)
{
mStateMachineListeners.remove(listener);
}
public void setIdentifierUpdateListener(Listener<IdentifierUpdateNotification> listener)
{
mIdentifierUpdateListener = listener;
}
public void setChannelType(Channel.ChannelType channelType)
{
mChannelType = channelType;
}
public void checkState()
{
if(mState.isActiveState() && mFadeTimeout <= System.currentTimeMillis())
{
setState(State.FADE);
}
else if(mState == State.FADE && mEndTimeout <= System.currentTimeMillis())
{
setState(State.TEARDOWN);
}
}
public State getState()
{
return mState;
}
public void setState(State state)
{
if(state == mState)
{
if(State.CALL_STATES.contains(state))
{
updateFadeTimeout();
}
}
else if(mState.canChangeTo(state))
{
switch(state)
{
case ACTIVE:
mState = state;
updateFadeTimeout();
broadcast(ChannelStateIdentifier.ACTIVE);
break;
case CONTROL:
//Don't allow traffic channels to be control channels, otherwise they can't transition to teardown
if(mChannelType == Channel.ChannelType.STANDARD)
{
mState = state;
updateFadeTimeout();
broadcast(ChannelStateIdentifier.CONTROL);
}
break;
case DATA:
mState = state;
updateFadeTimeout();
broadcast(ChannelStateIdentifier.DATA);
break;
case ENCRYPTED:
mState = state;
updateFadeTimeout();
broadcast(ChannelStateIdentifier.ENCRYPTED);
break;
case CALL:
mState = state;
updateFadeTimeout();
broadcast(ChannelStateIdentifier.CALL);
break;
case FADE:
mState = state;
broadcast(ChannelStateIdentifier.FADE);
break;
case IDLE:
mState = state;
broadcast(ChannelStateIdentifier.IDLE);
break;
case TEARDOWN:
mState = state;
broadcast(ChannelStateIdentifier.TEARDOWN);
break;
case RESET:
mState = State.RESET;
broadcast(ChannelStateIdentifier.RESET);
break;
default:
break;
}
//If the state successfully changed to the new state, announce it
if(mState == state)
{
for(IStateMachineListener listener: mStateMachineListeners)
{
listener.stateChanged(mState, mTimeslot);
}
}
}
}
private void broadcast(ChannelStateIdentifier channelStateIdentifier)
{
if(mIdentifierUpdateListener != null)
{
mIdentifierUpdateListener.receive(new IdentifierUpdateNotification(channelStateIdentifier,
IdentifierUpdateNotification.Operation.ADD, mTimeslot));
}
}
private void updateFadeTimeout()
{
mFadeTimeout = System.currentTimeMillis() + mFadeTimeoutBuffer;
}
public void setFadeTimeout(long timeout)
{
mFadeTimeout = timeout;
}
public long getFadeTimeout()
{
return mFadeTimeout;
}
public void setFadeTimeoutBuffer(long buffer)
{
mFadeTimeoutBuffer = buffer;
updateFadeTimeout();
}
private void updateEndTimeout()
{
mEndTimeout = System.currentTimeMillis() + mEndTimeoutBuffer;
}
public void setEndTimeoutBuffer(long buffer)
{
mEndTimeoutBuffer = buffer;
updateEndTimeout();
}
public void setEndTimeout(long endTimeout)
{
mEndTimeout = endTimeout;
}
public long getEndTimeout()
{
return mEndTimeout;
}
}