CecClientAdapter.java
/*
* *********************************************************************************************************************
*
* blueMarine II: Semantic Media Centre
* http://tidalwave.it/projects/bluemarine2
*
* Copyright (C) 2015 - 2021 by Tidalwave s.a.s. (http://tidalwave.it)
*
* *********************************************************************************************************************
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* *********************************************************************************************************************
*
* git clone https://bitbucket.org/tidalwave/bluemarine2-src
* git clone https://github.com/tidalwave-it/bluemarine2-src
*
* *********************************************************************************************************************
*/
package it.tidalwave.cec.impl;
import javax.annotation.Nonnull;
import javax.inject.Inject;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.io.IOException;
import it.tidalwave.util.NotFoundException;
import it.tidalwave.util.ProcessExecutor;
import it.tidalwave.util.ProcessExecutor.ConsoleOutput;
import it.tidalwave.util.annotation.VisibleForTesting;
import it.tidalwave.util.spi.DefaultProcessExecutor;
import it.tidalwave.messagebus.MessageBus;
import it.tidalwave.messagebus.annotation.ListensTo;
import it.tidalwave.messagebus.annotation.SimpleMessageSubscriber;
import it.tidalwave.cec.CecEvent;
import it.tidalwave.cec.CecEvent.EventType;
import it.tidalwave.bluemarine2.message.PowerOnNotification;
import lombok.extern.slf4j.Slf4j;
/***********************************************************************************************************************
*
* An adapter that receives notifications from {@code cec-client} and forwards events to the message bus.
*
* @stereotype Adapter
*
* @author Fabrizio Giudici
*
**********************************************************************************************************************/
@SimpleMessageSubscriber @Slf4j
public class CecClientAdapter
{
private static final String CEC_REGEX = "^TRAFFIC: *\\[ *([0-9]+)\\][ \\t>]*([0-9A-Fa-f]+):([0-9A-Fa-f]+):([0-9A-Fa-f]+)$";
private static final Pattern CEC_PATTERN = Pattern.compile(CEC_REGEX);
private ProcessExecutor executor;
@Inject
private MessageBus messageBus;
/*******************************************************************************************************************
*
* Parses the output from {@code cec-client} and fires events.
*
******************************************************************************************************************/
private final ConsoleOutput.Listener listener = string ->
{
final Matcher matcher = CEC_PATTERN.matcher(string);
if (matcher.matches())
{
final int eventType = Integer.parseInt(matcher.group(3), 16);
final int keyCode = Integer.parseInt(matcher.group(4), 16);
try
{
final CecEvent event = EventType.forCode(eventType).createEvent(keyCode);
log.debug("Sending {}...", event);
messageBus.publish(event);
}
catch (NotFoundException e)
{
// 04:1a:01 - Give deck status
// 04:90:00 - Report power status
// 04:89:01 - Vendor specific data
log.warn("Not found: {} / {}", string, e.getMessage());
}
}
};
/*******************************************************************************************************************
*
* At power on runs {@code cec-client}.
*
******************************************************************************************************************/
@VisibleForTesting void onPowerOnReceived (@Nonnull @ListensTo final PowerOnNotification notification)
{
try
{
log.info("onPowerOnReceived({})", notification);
executor = DefaultProcessExecutor.forExecutable("/usr/bin/cec-client") // FIXME: path
.withArguments("-d", "8", "-t", "p", "-o", "blueMarine")
.start();
executor.getStdout().setListener(listener);
}
catch (IOException e)
{
log.error("Cannot run cec-client: {}", e.toString());
// TODO: UI notification of the error
}
}
// TODO: kill executor on PowerOff?
}