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  * This is the callback interface for RTP packets.

    24  * 

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

    26  * 

    27  * @author Arne Kepp

    28  */

    29 public interface RTPAppIntf {

    30 

    31 	/**

    32 	 * The callback method through which the application will receive data from

    33 	 * jlibrtp. These calls are synchronous, so you will not receive any new

    34 	 * packets until this call returns.

    35 	 * 

    36 	 * @param frame

    37 	 *            the frame containing the data

    38 	 * @param participant

    39 	 *            the participant from which the data came

    40 	 */

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

    42 

    43 	/**

    44 	 * The callback method through which the application will receive

    45 	 * notifications about user updates, additions and byes. Types: 1 - Bye 2 -

    46 	 * New through RTP, check .getRtpSendSock() 3 - New through RTCP, check

    47 	 * .getRtcpSendSock() 4 - SDES packet received, check the getCname() etc

    48 	 * methods 5 - Matched SSRC to ip-address provided by application

    49 	 * 

    50 	 * @param type

    51 	 *            the type of event

    52 	 * @param participant

    53 	 *            the participants in question

    54 	 */

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

    56 

    57 	/**

    58 	 * The callback method through which the application can specify the number

    59 	 * of packets that make up a frame for a given payload type.

    60 	 * 

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

    62 	 * return whatever it has at the time.

    63 	 * 

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

    65 	 * 

    66 	 * This should be implemented as something fast, such as an integer array

    67 	 * with the indeces being the payload type.

    68 	 * 

    69 	 * @param payloadType

    70 	 *            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 }