org.mobicents.media.server.ctrl.rtsp.stack.RtspClientStackImpl.java Source code

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/*
 * JBoss, Home of Professional Open Source
 * Copyright XXXX, Red Hat Middleware LLC, and individual contributors as indicated
 * by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a full listing
 * of individual contributors.
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License, v. 2.0.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * 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,
 * v. 2.0 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */
package org.mobicents.media.server.ctrl.rtsp.stack;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.sdp.MediaDescription;
import javax.sdp.SessionDescription;

import org.apache.log4j.Logger;
import org.mobicents.media.server.ctrl.rtsp.endpoints.RtspConnection;
import org.mobicents.media.server.ctrl.rtsp.endpoints.RtspPacketEvent;
import org.mobicents.media.server.ctrl.rtsp.rtp.RTPSession;
import org.mobicents.media.server.io.network.PortManager;
import org.mobicents.media.server.io.network.UdpManager;
import org.mobicents.media.server.spi.listener.Listener;
import org.mobicents.media.server.spi.listener.Listeners;
import org.mobicents.media.server.spi.listener.TooManyListenersException;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.rtsp.RtspRequestEncoder;

/**
 * 
 * @author amit.bhayani
 * 
 */
public class RtspClientStackImpl implements RtspStack {

    private static Logger logger = Logger.getLogger(RtspClientStackImpl.class);

    private final UdpManager udpManager;
    private final String user;
    private final String passwd;
    private final String host;
    private final int port;
    private final String url;

    private Channel channel = null;
    private Bootstrap bootstrap;
    private EventLoopGroup workerGroup = new NioEventLoopGroup();

    private String session;
    private SessionDescription sessionDescription;
    private List<RTPSession> rtpSessions = new ArrayList<RTPSession>();
    private Listeners<Listener<RtspPacketEvent>> listeners = new Listeners<Listener<RtspPacketEvent>>();

    public RtspClientStackImpl(UdpManager udpManager, String url) {
        this.udpManager = udpManager;

        Pattern pattern = Pattern.compile("^rtsp://(([^:]+):([^@]*)@)?([^:/]+)(:([0-9]+))?(.*)");
        Matcher m = pattern.matcher(url);
        if (!m.find()) {
            throw new IllegalArgumentException("? RTSP ?[" + url + "]");
        }

        user = m.group(2);
        passwd = m.group(3);
        host = m.group(4);
        String uri = m.group(6);

        int defaultPort = 554;
        try {
            defaultPort = Integer.parseInt(m.group(5));
        } catch (Exception e) {
        }
        port = defaultPort;

        this.url = "rtsp://" + host + ":" + port + uri;
    }

    public void start() throws IOException {

        Bootstrap b = new Bootstrap();
        b.group(workerGroup);
        b.channel(NioSocketChannel.class);
        b.option(ChannelOption.SO_KEEPALIVE, true);
        b.handler(new ChannelInitializer<SocketChannel>() {
            @Override
            public void initChannel(SocketChannel ch) throws Exception {
                // httpResponse??HttpResponseDecoder?
                ch.pipeline().addLast(new RtspResponseDecoder());
                // ??httprequest?HttpRequestEncoder?
                ch.pipeline().addLast(new RtspRequestEncoder());
                // ch.pipeline().addLast(new HttpObjectAggregator(1024 * 64));
                ch.pipeline().addLast("handler", new RtspResponseHandler(RtspClientStackImpl.this));
            }
        });

        // Start the client.
        ChannelFuture f = b.connect(getHost(), getPort());
        try {
            f.sync();
            channel = f.channel();

            InetSocketAddress bindAddress = new InetSocketAddress(this.host, this.port);

            logger.info("Mobicents RTSP Client started and bound to " + bindAddress.toString());

        } catch (InterruptedException e) {
            throw new IOException(f.cause());
        }
    }

    public RTPSession createRtpSession(MediaDescription md) {

        RTPSession rtp = new RTPSession(null, udpManager.getPortManager().next(),
                udpManager.getPortManager().peek());
        rtp.setRtpInterleaved(rtpSessions.size() * 2 + 0);
        rtp.setRtcpInterleaved(rtpSessions.size() * 2 + 1);
        rtp.setMediaDescription(md);
        rtp.setServerHost(host);
        rtpSessions.add(rtp);
        return rtp;
    }

    public RTPSession getLastRtpSession() {
        return rtpSessions.isEmpty() ? null : rtpSessions.get(rtpSessions.size() - 1);
    }

    public void stop() {
        if (null != channel) {
            RtspResponseHandler handler = (RtspResponseHandler) channel.pipeline().get("handler");
            handler.sendTeardown();

            ChannelFuture cf = channel.closeFuture();
            cf.addListener(new ClientChannelFutureListener());
            channel.close();
            cf.awaitUninterruptibly();

            channel = null;
        }
    }

    private class ClientChannelFutureListener implements ChannelFutureListener {

        public void operationComplete(ChannelFuture arg0) throws Exception {
            logger.info("Mobicents RTSP Client Stop complete");

            workerGroup.shutdownGracefully();
        }

    }

    public void sendRequest(HttpRequest rtspRequest, String remoteHost, int remotePort) {

        ChannelFuture future = null;
        if (channel == null || (channel != null && !channel.isOpen())) {
            // Start the connection attempt.
            future = bootstrap.connect(new InetSocketAddress(remoteHost, remotePort));

            // Wait until the connection attempt succeeds or fails.
            channel = future.awaitUninterruptibly().channel();
            if (!future.isSuccess()) {
                future.cause().printStackTrace();
                // bootstrap.releaseExternalResources();
                return;
            }
        }

        channel.writeAndFlush(rtspRequest);
    }

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public String getPasswd() {
        return passwd;
    }

    public String getUser() {
        return user;
    }

    public Channel getChannel() {
        return channel;
    }

    public void setSession(String sessionId) {
        this.session = sessionId;
    }

    public String getSession() {
        return session;
    }

    public String getUrl() {
        return url;
    }

    public void addListener(Listener<RtspPacketEvent> listener) throws TooManyListenersException {
        listeners.add(listener);
    }

    public void dispatch(RtspPacketEvent event) {
        listeners.dispatch(event);
    }

    public void setSessionDescription(SessionDescription descriptor) {
        this.sessionDescription = descriptor;
    }

    public SessionDescription getSessionDescription() {
        return sessionDescription;
    }

}