1 /**

     2  * Java RTP Library (jlibrtp)

     3  * Copyright (C) 2006 Arne Kepp

     4  * 

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Lesser General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2.1 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Lesser General Public License for more details.

    14  * 

    15  * You should have received a copy of the GNU Lesser General Public

    16  * License along with this library; if not, write to the Free Software

    17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

    18  */

    19 

    20 package jlibrtp;

    21 

    22 

    23 /**

    24  * This is the callback interface for RTP packets.

    25  * 

    26  * It is mandatory, but you can inore the data if you like.

    27  * 

    28  * @author Arne Kepp

    29  */

    30 public interface RTPAppIntf {

    31 	

    32 	/**

    33 	 * The callback method through which the application will receive

    34 	 * data from jlibrtp. These calls are synchronous, so you will not

    35 	 * receive any new packets until this call returns.

    36 	 * 

    37 	 * @param frame the frame containing the data

    38 	 * @param participant the participant from which the data came

    39 	 */

    40 	public void receiveData(DataFrame frame, Participant participant);

    41 	

    42 	

    43 	/**

    44 	 * The callback method through which the application will receive

    45 	 * notifications about user updates, additions and byes.

    46 	 *  Types:

    47 	 *  	1 - Bye

    48 	 *  	2 - New through RTP, check .getRtpSendSock()

    49 	 *  	3 - New through RTCP, check .getRtcpSendSock()

    50 	 * 		4 - SDES packet received, check the getCname() etc methods

    51 	 *      5 - Matched SSRC to ip-address provided by application

    52 	 * 

    53 	 * @param type the type of event

    54 	 * @param participant the participants in question

    55 	 */

    56 	public void userEvent(int type, Participant[] participant);

    57 	

    58 	/**

    59 	 * The callback method through which the application can specify

    60 	 * the number of packets that make up a frame for a given payload type.

    61 	 * 

    62 	 * A negative value denotes frames of variable length, so jlibrtp

    63 	 * will return whatever it has at the time.

    64 	 * 

    65 	 * In most applications, this function can simply return 1.

    66 	 * 

    67 	 * This should be implemented as something fast, such as an

    68 	 * integer array with the indeces being the payload type.

    69 	 * 

    70 	 * @param payloadType the payload type specified in the RTP packet

    71 	 * @return the number of packets that make up a frame

    72 	 */

    73 	public int frameSize(int payloadType);

    74 }