WebRtcOneToMany.java

/*
 * (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;

import com.kurento.kmf.content.WebRtcContentHandler;
import com.kurento.kmf.content.WebRtcContentService;
import com.kurento.kmf.content.WebRtcContentSession;
import com.kurento.kmf.media.MediaPipeline;
import com.kurento.kmf.media.RecorderEndpoint;
import com.kurento.kmf.media.WebRtcEndpoint;

/**
 * This handler implements a one to many video conference using WebRtcEnpoints;
 * the first session acts as "master", and the rest of concurrent sessions will
 * watch the "master" session in his remote stream; master's remote is a
 * loopback at the beginning, and it is changing with the stream of the each
 * participant in the conference.
 * 
 * @author Boni Garcia (bgarcia@gsyc.es)
 * @since 3.0.7
 */
@WebRtcContentService(path = "/webRtcOneToMany/*")
public class WebRtcOneToMany extends WebRtcContentHandler {

	private WebRtcEndpoint firstWebRtcEndpoint;

	private String sessionId;

	@Override
	public synchronized void onContentRequest(
			WebRtcContentSession contentSession) throws Exception {
		String contentId = contentSession.getContentId();
		if (firstWebRtcEndpoint == null) {
			MediaPipeline mp = contentSession.getMediaPipelineFactory()
					.create();
			contentSession.releaseOnTerminate(mp);

			firstWebRtcEndpoint = mp.newWebRtcEndpoint().build();
			sessionId = contentSession.getSessionId();
			contentSession.releaseOnTerminate(firstWebRtcEndpoint);
			firstWebRtcEndpoint.connect(firstWebRtcEndpoint);

			if (contentId != null && contentId.equalsIgnoreCase("record")) {
				RecorderEndpoint recorderEndPoint = mp.newRecorderEndpoint(
						"file:///tmp/master").build();
				contentSession.setAttribute("recorder", recorderEndPoint);
				firstWebRtcEndpoint.connect(recorderEndPoint);
			}

			contentSession.start(firstWebRtcEndpoint);
		} else {
			MediaPipeline mp = firstWebRtcEndpoint.getMediaPipeline();

			WebRtcEndpoint newWebRtcEndpoint = mp.newWebRtcEndpoint().build();
			contentSession.releaseOnTerminate(newWebRtcEndpoint);
			newWebRtcEndpoint.connect(firstWebRtcEndpoint);
			firstWebRtcEndpoint.connect(newWebRtcEndpoint);

			if (contentId != null && contentId.equalsIgnoreCase("record")) {
				RecorderEndpoint recorderEndPoint = mp.newRecorderEndpoint(
						"file:///tmp/peer").build();
				contentSession.setAttribute("recorder", recorderEndPoint);
				newWebRtcEndpoint.connect(recorderEndPoint);
			}

			contentSession.start(newWebRtcEndpoint);
		}
	}

	@Override
	public void onContentStarted(WebRtcContentSession contentSession) {
		RecorderEndpoint recorderEndPoint = (RecorderEndpoint) contentSession
				.getAttribute("recorder");
		if (recorderEndPoint != null) {
			recorderEndPoint.record();
		}
	}

	@Override
	public void onSessionTerminated(WebRtcContentSession contentSession,
			int code, String reason) throws Exception {
		if (contentSession.getSessionId().equals(sessionId)) {
			getLogger().info("Terminating first WebRTC session");
			firstWebRtcEndpoint = null;
		}
		super.onSessionTerminated(contentSession, code, reason);
	}
}