/**

 * Java RTP Library (jlibrtp)

 * Copyright (C) 2006 Arne Kepp

 * 

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

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

 * License as published by the Free Software Foundation; either

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

 *

 * 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.

 * 

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

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

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

 */

package jlibrtp;

/**

 * This is the callback interface for RTCP packets.

 * 

 * It is optional, you do not have to register it.

 * 

 * If there are specific events you wish to ignore,

 * you can simply implement empty functions.

 * 

 * These are all syncrhonous, make sure to return quickly

 * or do the handling in a new thread.

 * 

 * @author Arne Kepp

 */

public interface RTCPAppIntf {

	/**

	 * This function is called whenever a Sender Report (SR) packet is received

	 * and returns unmodified values.

	 *  

	 * A sender report may optionally include Receiver Reports (RR), 

	 * which are returned as arrays. Index i corresponds to the same report

	 * throughout all of the arrays.

	 * 

	 * @param ssrc the (SR) SSRC of the sender

	 * @param ntpHighOrder (SR) NTP high order

	 * @param ntpLowOrder (SR) NTP low order

	 * @param rtpTimestamp (SR) RTP timestamp corresponding to the NTP timestamp

	 * @param packetCount (SR) Packets sent since start of session

	 * @param octetCount (SR) Octets sent since start of session

	 * @param reporteeSsrc (RR) SSRC of sender the receiver is reporting in

	 * @param lossFraction (RR) Loss fraction, see RFC 3550

	 * @param cumulPacketsLost (RR) Cumulative number of packets lost

	 * @param extHighSeq (RR) Extended highest sequence RTP packet received

	 * @param interArrivalJitter (RR) Interarrival jitter, see RFC 3550

	 * @param lastSRTimeStamp (RR) RTP timestamp when last SR was received 

	 * @param delayLastSR (RR) Delay, in RTP, since last SR was received

	 */

	public void SRPktReceived(long ssrc, long ntpHighOrder, long ntpLowOrder, 

			long rtpTimestamp, long packetCount, long octetCount,

			// Get the receiver reports, if any

			long[] reporteeSsrc, int[] lossFraction, int[] cumulPacketsLost, long[] extHighSeq, 

			long[] interArrivalJitter, long[] lastSRTimeStamp, long[] delayLastSR);

	/**

	 * This function is called whenever a Receiver Report (SR) packet is received

	 * and returns unmodified values.

	 * 

	 * A receiver report may optionally include report blocks, 

	 * which are returned as arrays. Index i corresponds to the same report

	 * throughout all of the arrays.

	 * 

	 * @param reporterSsrc SSRC of the receiver reporting

	 * @param reporteeSsrc (RR) SSRC of sender the receiver is reporting in

	 * @param lossFraction (RR) Loss fraction, see RFC 3550

	 * @param cumulPacketsLost (RR) Cumulative number of packets lost

	 * @param extHighSeq (RR) Extended highest sequence RTP packet received

	 * @param interArrivalJitter (RR) Interarrival jitter, see RFC 3550

	 * @param lastSRTimeStamp (RR) RTP timestamp when last SR was received 

	 * @param delayLastSR (RR) Delay, in RTP, since last SR was received

	 */

	public void RRPktReceived(long reporterSsrc, long[] reporteeSsrc, 

			int[] lossFraction, int[] cumulPacketsLost, long[] extHighSeq, 

			long[] interArrivalJitter, long[] lastSRTimeStamp, long[] delayLastSR);

	/**

	 * This function is called whenever a Source Description (SDES) packet is received.

	 * 

	 * It currently returns the updated participants AFTER they have been updated.

	 * 

	 * @param relevantParticipants participants mentioned in the SDES packet

	 */

	public void SDESPktReceived(Participant[] relevantParticipants);

	/**

	 * This function is called whenever a Bye (BYE) packet is received.

	 * 

	 * The participants will automatically be deleted from the participant

	 * database after some time, but in the mean time the application may 

	 * still receive RTP  packets from this source.

	 * 

	 * @param relevantParticipants participants whose SSRC was in the packet

	 * @param reason the reason provided in the packet

	 */

	public void BYEPktReceived(Participant[] relevantParticipants, String reason);

	/**

	 * This function is called whenever an Application (APP) packet is received.

	 * 

	 * @param part the participant associated with the SSRC

	 * @param subtype specified in the packet

	 * @param name ASCII description of packet

	 * @param data in the packet

	 */

	public void APPPktReceived(Participant part, int subtype, byte[] name, byte[] data);

}