/*
* (C) Copyright 2014 Kurento (http://kurento.org/)
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public License
* (LGPL) version 2.1 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl-2.1.html
*
* This library 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
* Lesser General Public License for more details.
*
*/
package com.kurento.demo.webrtc.chat;
import java.util.HashMap;
import java.util.Map;
import com.kurento.kmf.content.ContentEvent;
import com.kurento.kmf.content.WebRtcContentHandler;
import com.kurento.kmf.content.WebRtcContentService;
import com.kurento.kmf.content.WebRtcContentSession;
import com.kurento.kmf.content.jsonrpc.Constraints;
import com.kurento.kmf.media.MediaPipeline;
import com.kurento.kmf.media.WebRtcEndpoint;
/**
* Handler implementing a video conference chat room using WebRtcEnpoints.
*
* @author Boni Garcia (bgarcia@gsyc.es)
* @since 3.0.7
*/
@WebRtcContentService(path = "/videocall/*")
public class VideoCall extends WebRtcContentHandler {
protected Map<String, Connection> connections;
protected MediaPipeline mp;
private static int ROOM_SIZE = 5;
@Override
public synchronized void onContentRequest(
WebRtcContentSession contentSession) throws Exception {
if (connections == null) {
getLogger().debug("Creating connections");
connections = new HashMap<String, Connection>();
mp = contentSession.getMediaPipelineFactory().create();
contentSession.releaseOnTerminate(mp);
}
final String nickName = contentSession.getContentId();
Connection connection = null;
if (!connections.containsKey(nickName)) {
getLogger().debug("First request of " + nickName);
// We cannot make more connections than the room size
if (connections.size() == ROOM_SIZE) {
roomFull(contentSession);
return;
}
// The first time, connections must be setup
connection = new Connection(ROOM_SIZE);
connections.put(nickName, connection);
} else {
connection = connections.get(nickName);
getLogger().debug("Further requests of " + nickName);
if (connection.allElementsPresent()) {
if (connections.size() == ROOM_SIZE) {
// We cannot make more connections than the room size
roomFull(contentSession);
} else {
// If connection is full it means that another session is
// trying to connect using the same nick name, so we
// terminate the session and return an error
contentSession
.terminate(403,
"The nick name is in use. Please change it and try again.");
}
return;
}
}
// Build WebRtcEndpoint
WebRtcEndpoint webRtcEndpoint = mp.newWebRtcEndpoint().build();
contentSession.releaseOnTerminate(webRtcEndpoint);
// Check if it is a transmitter or a receiver
Constraints videoConstraints = contentSession.getVideoConstraints();
if (videoConstraints.name().equalsIgnoreCase("SENDONLY")) {
// it means the request is from the transmitter
connection.setTransmitter(webRtcEndpoint, nickName);
contentSession.publishEvent(new ContentEvent("nickname", nickName));
} else {
connection.addReceiver(webRtcEndpoint, contentSession);
}
// If at this moment the connection is full, then it can be established
// the connections with other elements
if (connection.allElementsPresent()) {
for (String s : connections.keySet()) {
if (!s.equals(nickName)) {
connection.connectTransmitter(connections.get(s)
.getReceivers());
connection.connectReceivers(connections.get(s)
.getTransmitter());
}
}
}
// Finally the session is started
contentSession.start(webRtcEndpoint);
}
private void roomFull(WebRtcContentSession contentSession) {
contentSession.terminate(403, "The room is full. Please try later.");
}
@Override
public void onSessionTerminated(WebRtcContentSession contentSession,
int code, String reason) throws Exception {
final String nickName = contentSession.getContentId();
if (connections != null && connections.containsKey(nickName)) {
getLogger().debug("Removing {} of the video chat room", nickName);
connections.remove(nickName);
if (connections.isEmpty()) {
getLogger().debug("Destroying {} video chat room", connections);
connections = null;
}
}
super.onSessionTerminated(contentSession, code, reason);
}
}