RTPVideoFormat.java

/*
 * Mobicents, Communications Middleware
 * 
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party
 * contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * 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
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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.
 *
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 *
 * Boston, MA  02110-1301  USA
 */
package org.restcomm.sdp;

import java.util.ArrayList;
import java.util.Collection;
import javax.sdp.Attribute;
import javax.sdp.SdpFactory;


/**
 *
 * @author kulikov
 */
public class RTPVideoFormat extends VideoFormat implements RTPFormat {

    private final static SdpFactory sdpFactory = SdpFactory.getInstance();
    private int payloadType;

    public RTPVideoFormat(int payloadType, String encdingName) {
        super(encdingName);
        this.payloadType = payloadType;
    }
    
    public RTPVideoFormat(int payloadType, String encdingName, float fr) {
        super(encdingName, -1,  fr);
        this.payloadType = payloadType;
    }

    
    
    public RTPVideoFormat(int payloadType,String encoding, int maxDataLength, float frameRate) {
		super(encoding, maxDataLength,  frameRate);
		this.payloadType = payloadType;
	}

	public int getPayloadType() {
        return payloadType;
    }

    private String rtpmap() {
        String s = payloadType + " " + getEncoding();
        if (getFrameRate() > 0) {
            int fr = (int) getFrameRate();
            s += "/" + fr;
        }
        return s;
    }

    public static RTPVideoFormat parseFormat(String rtpmap) {
        RTPVideoFormat fmt = null;
        String tokens[] = rtpmap.toLowerCase().split(" ");

        // split params
        int p = Integer.parseInt(tokens[0]);
        tokens = tokens[1].split("/");

        String encodingName = tokens[0];        
        if (tokens.length > 1) {
            float fr = Float.parseFloat(tokens[1]);
            fmt = new RTPVideoFormat(p, encodingName, fr);
        } else {
            fmt = new RTPVideoFormat(p, encodingName);
        }
        return fmt;
    }

    public Collection<Attribute> encode() {
        ArrayList<Attribute> list = new ArrayList();
        if (this.getEncoding().equals(VideoFormat.H261)) {
            list.add(sdpFactory.createAttribute("rtpmap", rtpmap()));
        }
        return list;
    }
}