mirror of
https://github.com/DSheirer/sdrtrunk.git
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325 lines
12 KiB
Java
325 lines
12 KiB
Java
/*******************************************************************************
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* sdrtrunk
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* Copyright (C) 2014-2016 Dennis Sheirer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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******************************************************************************/
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package audio.broadcast.shoutcast.v1;
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import audio.broadcast.AudioBroadcaster;
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import audio.broadcast.BroadcastState;
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import audio.broadcast.IBroadcastMetadataUpdater;
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import org.apache.mina.core.RuntimeIoException;
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import org.apache.mina.core.buffer.IoBuffer;
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import org.apache.mina.core.future.ConnectFuture;
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import org.apache.mina.core.service.IoHandlerAdapter;
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import org.apache.mina.core.session.IoSession;
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import org.apache.mina.filter.codec.ProtocolCodecFilter;
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import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
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import org.apache.mina.transport.socket.nio.NioSocketConnector;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import util.ThreadPool;
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import java.io.IOException;
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import java.net.ConnectException;
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import java.net.InetSocketAddress;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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public class ShoutcastV1AudioBroadcaster extends AudioBroadcaster
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{
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private final static Logger mLog = LoggerFactory.getLogger(ShoutcastV1AudioBroadcaster.class);
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private static final long RECONNECT_INTERVAL_MILLISECONDS = 30000; //30 seconds
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private NioSocketConnector mSocketConnector;
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private IoSession mStreamingSession = null;
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private IBroadcastMetadataUpdater mMetadataUpdater;
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private long mLastConnectionAttempt = 0;
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private AtomicBoolean mConnecting = new AtomicBoolean();
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/**
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* Creates a Shoutcast v1 compatible broadcaster using TCP protocol.
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*
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* Note: use @see ShoutcastV2AudioBroadcaster for Shoutcast version 2.x and newer.
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*
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* This broadcaster uses the Apache Mina library for the streaming socket connection and for metadata updates. The
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* ShoutcastV1IOHandler manages all interaction with the Shoutcast server and manages the overall broadcast state.
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*
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* @param configuration for the Shoutcast stream
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*/
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public ShoutcastV1AudioBroadcaster(ShoutcastV1Configuration configuration)
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{
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super(configuration);
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}
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/**
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* Shoutcast V1 broadcast configuration
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*/
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private ShoutcastV1Configuration getConfiguration()
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{
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return (ShoutcastV1Configuration) getBroadcastConfiguration();
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}
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@Override
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protected IBroadcastMetadataUpdater getMetadataUpdater()
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{
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if(mMetadataUpdater == null)
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{
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mMetadataUpdater = new ShoutcastV1BroadcastMetadataUpdater(getConfiguration());
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}
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return mMetadataUpdater;
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}
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/**
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* Broadcasts the audio frame or sequence
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*/
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@Override
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protected void broadcastAudio(byte[] audio)
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{
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if(audio != null && audio.length > 0 && connect() && mStreamingSession != null && mStreamingSession.isConnected())
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{
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IoBuffer buf = IoBuffer.allocate(audio.length).setAutoExpand(false);
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buf.put(audio);
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buf.flip();
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mStreamingSession.write(buf);
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}
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}
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/**
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* (Re)Connects the broadcaster to the remote server if it currently is disconnected and indicates if the broadcaster
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* is currently connected to the remote server following any connection attempts.
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*
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* Attempts to connect via this method when the broadcast state indicates an error condition will be ignored.
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*
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* @return true if the audio handler can stream audio
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*/
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private boolean connect()
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{
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if(!connected() && canConnect() &&
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(mLastConnectionAttempt + RECONNECT_INTERVAL_MILLISECONDS < System.currentTimeMillis()) &&
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mConnecting.compareAndSet(false, true))
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{
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mLastConnectionAttempt = System.currentTimeMillis();
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if(mSocketConnector == null)
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{
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mSocketConnector = new NioSocketConnector();
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mSocketConnector.setConnectTimeoutCheckInterval(10000);
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// mSocketConnector.getFilterChain().addLast("logger",
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// new LoggingFilter(ShoutcastV1AudioBroadcaster.class));
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mSocketConnector.getFilterChain().addLast("codec",
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new ProtocolCodecFilter(new TextLineCodecFactory()));
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mSocketConnector.setHandler(new ShoutcastIOHandler());
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}
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mStreamingSession = null;
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Runnable runnable = new Runnable()
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{
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@Override
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public void run()
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{
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setBroadcastState(BroadcastState.CONNECTING);
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try
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{
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ConnectFuture future = mSocketConnector
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.connect(new InetSocketAddress(getBroadcastConfiguration().getHost(),
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getBroadcastConfiguration().getPort()));
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future.awaitUninterruptibly();
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mStreamingSession = future.getSession();
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}
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catch(RuntimeIoException rie)
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{
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Throwable throwableCause = rie.getCause();
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if(throwableCause instanceof ConnectException)
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{
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setBroadcastState(BroadcastState.NO_SERVER);
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}
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else if(throwableCause != null)
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{
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setBroadcastState(BroadcastState.ERROR);
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mLog.debug("Failed to connect", rie);
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}
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else
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{
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setBroadcastState(BroadcastState.ERROR);
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mLog.debug("Failed to connect - no exception is available");
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}
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disconnect();
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}
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catch(Throwable t)
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{
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disconnect();
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}
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mConnecting.set(false);
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}
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};
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ThreadPool.SCHEDULED.schedule(runnable, 0l, TimeUnit.SECONDS);
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}
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return connected();
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}
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/**
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* Disconnect from the remote broadcast server and cleanup input/output streams and socket connection
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*/
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public void disconnect()
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{
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if(connected() && mStreamingSession != null)
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{
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mStreamingSession.closeNow();
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}
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else
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{
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mLastConnectionAttempt = System.currentTimeMillis();
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}
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}
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/**
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* IO Handler for managing Icecast TCP connection and credentials
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*/
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public class ShoutcastIOHandler extends IoHandlerAdapter
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{
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/**
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* Sends stream configuration and user credentials upon connecting to remote server
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*/
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@Override
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public void sessionOpened(IoSession session) throws Exception
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{
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StringBuilder sb = new StringBuilder();
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//Password
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sb.append(getConfiguration().getPassword()).append(ShoutcastMetadata.COMMAND_TERMINATOR);
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//Metadata
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sb.append(ShoutcastMetadata.STREAM_NAME.encode(getConfiguration().getName()));
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sb.append(ShoutcastMetadata.PUBLIC.encode(getConfiguration().isPublic()));
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sb.append(ShoutcastMetadata.GENRE.encode(getConfiguration().getGenre()));
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sb.append(ShoutcastMetadata.DESCRIPTION.encode(getConfiguration().getDescription()));
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sb.append(ShoutcastMetadata.AUDIO_BIT_RATE.encode(getConfiguration().getBitRate()));
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//End of connection string
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sb.append(ShoutcastMetadata.COMMAND_TERMINATOR);
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session.write(sb.toString());
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}
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@Override
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public void sessionClosed(IoSession session) throws Exception
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{
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mLastConnectionAttempt = System.currentTimeMillis();
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//If there is already an error state, don't override it. Otherwise, set state to disconnected
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if(!getBroadcastState().isErrorState())
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{
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setBroadcastState(BroadcastState.DISCONNECTED);
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}
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mStreamingSession = null;
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mConnecting.set(false);
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super.sessionClosed(session);
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}
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@Override
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public void exceptionCaught(IoSession session, Throwable cause) throws Exception
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{
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if(cause instanceof IOException)
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{
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IOException ioe = (IOException)cause;
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if(ioe.getMessage() != null)
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{
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String reason = ioe.getMessage();
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if(reason.startsWith("Connection reset"))
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{
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mLog.info("Streaming connection reset by remote server - reestablishing connection");
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disconnect();
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}
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else if(reason.startsWith("Operation timed out"))
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{
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mLog.info("Streaming connection timed out - resetting connection");
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disconnect();
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}
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else
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{
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setBroadcastState(BroadcastState.ERROR);
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disconnect();
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mLog.error("Unrecognized IO error: " + reason + ". Streaming halted.");
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}
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}
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else
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{
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setBroadcastState(BroadcastState.ERROR);
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disconnect();
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mLog.error("Unspecified IO error - streaming halted.");
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}
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}
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else
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{
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mLog.error("Broadcast error", cause);
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setBroadcastState(BroadcastState.ERROR);
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disconnect();
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}
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mConnecting.set(false);
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}
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@Override
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public void messageReceived(IoSession session, Object object) throws Exception
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{
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if(object instanceof String)
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{
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String message = (String) object;
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if(message != null && !message.trim().isEmpty())
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{
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if(message.startsWith("OK"))
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{
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setBroadcastState(BroadcastState.CONNECTED);
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}
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else if(message.startsWith("icy-caps:"))
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{
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//TODO: what does icy-caps:11 tell us?
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}
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else
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{
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mLog.error("Unrecognized server response:" + message);
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setBroadcastState(BroadcastState.ERROR);
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}
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}
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}
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else
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{
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mLog.error("Icecast TCP broadcaster - unrecognized message [ " + object.getClass() +
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"] received:" + object.toString());
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}
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}
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}
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}
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