--- a/src/jlibrtp/ParticipantDatabase.java Thu May 28 14:26:06 2009 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,256 +0,0 @@
-/**
- * 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;
-
-import java.util.*;
-import java.util.concurrent.*;
-
-/**
- * The participant database maintains three hashtables with participants.
- *
- * The key issue is to be fast for operations that happen every time an
- * RTP packet is sent or received. We allow linear searching in cases
- * where we need to update participants with information.
- *
- * The keying is therefore usually the SSRC. In cases where we have the
- * cname, but no SSRC is known (no SDES packet has been received), a
- * simple hash i calculated based on the CNAME. The RTCP code should,
- * when receiving SDES packets, check whether the participant is known
- * and update the copy in this database with SSRC if needed.
- *
- * @author Arne Kepp
- */
-public class ParticipantDatabase {
- /** The parent RTP Session */
- RTPSession rtpSession = null;
- /**
- * A linked list to hold participants explicitly added by the application
- * In unicast mode this is the list used for RTP and RTCP transmission,
- * in multicast it should not be in use.
- */
- LinkedList<Participant> receivers = new LinkedList<Participant>();
- /**
- * The hashtable holds participants added through received RTP and RTCP packets,
- * as well as participants that have been linked to an SSRC by ip address (in unicast mode).
- */
- ConcurrentHashMap<Long,Participant> ssrcTable = new ConcurrentHashMap<Long,Participant>();
-
- /**
- * Simple constructor
- *
- * @param parent parent RTPSession
- */
- protected ParticipantDatabase(RTPSession parent) {
- rtpSession = parent;
- }
-
- /**
- *
- * @param cameFrom 0: Application, 1: RTP packet, 2: RTCP
- * @param p the participant
- * @return 0 if okay, -1 if not
- */
- protected int addParticipant(int cameFrom, Participant p) {
- //Multicast or not?
- if(this.rtpSession.mcSession) {
- return this.addParticipantMulticast(cameFrom, p);
- } else {
- return this.addParticipantUnicast(cameFrom, p);
- }
-
- }
-
- /**
- * Add a multicast participant to the database
- *
- * @param cameFrom 0: Application, 1,2: discovered through RTP or RTCP
- * @param p the participant to add
- * @return 0 if okay, -2 if redundant, -1 if adding participant to multicast
- */
- private int addParticipantMulticast(int cameFrom, Participant p) {
- if( cameFrom == 0) {
- System.out.println("ParticipantDatabase.addParticipant() doesnt expect"
- + " application to add participants to multicast session.");
- return -1;
- } else {
- // Check this one is not redundant
- if(this.ssrcTable.contains(p.ssrc)) {
- System.out.println("ParticipantDatabase.addParticipant() SSRC "
- +"already known " + Long.toString(p.ssrc));
- return -2;
- } else {
- this.ssrcTable.put(p.ssrc, p);
- return 0;
- }
- }
- }
-
- /**
- * Add a unicast participant to the database
- *
- * Result will be reported back through tpSession.appIntf.userEvent
- *
- * @param cameFrom 0: Application, 1,2: discovered through RTP or RTCP
- * @param p the participant to add
- * @return 0 if new, 1 if
- */
- private int addParticipantUnicast(int cameFrom, Participant p) {
- if(cameFrom == 0) {
- //Check whether there is a match in the ssrcTable
- boolean notDone = true;
-
- Enumeration<Participant> enu = this.ssrcTable.elements();
- while(notDone && enu.hasMoreElements()) {
- Participant part = enu.nextElement();
- if(part.unexpected &&
- (part.rtcpReceivedFromAddress.equals(part.rtcpAddress.getAddress())
- || part.rtpReceivedFromAddress.equals(part.rtpAddress.getAddress()))) {
-
- part.rtpAddress = p.rtpAddress;
- part.rtcpAddress = p.rtcpAddress;
- part.unexpected = false;
-
- //Report the match back to the application
- Participant[] partArray = {part};
- this.rtpSession.appIntf.userEvent(5, partArray);
-
- notDone = false;
- p = part;
- }
- }
-
- //Add to the table of people that we send packets to
- this.receivers.add(p);
- return 0;
-
- } else {
- //Check whether there's a match in the receivers table
- boolean notDone = true;
- //System.out.println("GOT " + p.cname);
- Iterator<Participant> iter = this.receivers.iterator();
-
- while(notDone && iter.hasNext()) {
- Participant part = iter.next();
-
- //System.out.println(part.rtpAddress.getAddress().toString()
- // + " " + part.rtcpAddress.getAddress().toString()
- // + " " + p.rtpReceivedFromAddress.getAddress().toString()
- // + " " + p.rtcpReceivedFromAddress.getAddress().toString());
-
- //System.out.println(" HUUHHHH? " + p.rtcpReceivedFromAddress.getAddress().equals(part.rtcpAddress.getAddress()));
- if((cameFrom == 1 && p.rtpReceivedFromAddress.getAddress().equals(part.rtpAddress.getAddress()))
- || (cameFrom == 2 && p.rtcpReceivedFromAddress.getAddress().equals(part.rtcpAddress.getAddress()))) {
-
- part.rtpReceivedFromAddress = p.rtpReceivedFromAddress;
- part.rtcpReceivedFromAddress = p.rtcpReceivedFromAddress;
-
- // Move information
- part.ssrc = p.ssrc;
- part.cname = p.cname;
- part.name = p.name;
- part.loc = p.loc;
- part.phone = p.phone;
- part.email = p.email;
- part.note = p.note;
- part.tool = p.tool;
- part.priv = p.priv;
-
- this.ssrcTable.put(part.ssrc, part);
-
- //Report the match back to the application
- Participant[] partArray = {part};
- this.rtpSession.appIntf.userEvent(5, partArray);
- return 0;
- }
- }
-
- // No match? ok
- this.ssrcTable.put(p.ssrc, p);
- return 0;
- }
- }
-
- /**
- * Remove a participant from all tables
- *
- * @param p the participant to be removed
- */
- protected void removeParticipant(Participant p) {
- if(! this.rtpSession.mcSession)
- this.receivers.remove(p);
-
- this.ssrcTable.remove(p.ssrc, p);
- }
-
- /**
- * Find a participant based on the ssrc
- *
- * @param ssrc of the participant to be found
- * @return the participant, null if unknonw
- */
- protected Participant getParticipant(long ssrc) {
- Participant p = null;
- p = ssrcTable.get(ssrc);
- return p;
- }
-
- /**
- * Iterator for all the unicast receivers.
- *
- * This one is used by both RTP for sending packets, as well as RTCP.
- *
- * @return iterator for unicast participants
- */
- protected Iterator<Participant> getUnicastReceivers() {
- if(! this.rtpSession.mcSession) {
- return this.receivers.iterator();
- } else {
- System.out.println("Request for ParticipantDatabase.getUnicastReceivers in multicast session");
- return null;
- }
- }
-
- /**
- * Enumeration of all the participants with known ssrcs.
- *
- * This is primarily used for sending packets in multicast sessions.
- *
- * @return enumerator with all the participants with known SSRCs
- */
- protected Enumeration<Participant> getParticipants() {
- return this.ssrcTable.elements();
- }
-
- protected void debugPrint() {
- System.out.println(" ParticipantDatabase.debugPrint()");
- Participant p;
- Enumeration enu = ssrcTable.elements();
- while(enu.hasMoreElements()) {
- p = (Participant) enu.nextElement();
- System.out.println(" ssrcTable ssrc:"+p.ssrc+" cname:"+p.cname
- +" loc:"+p.loc+" rtpAddress:"+p.rtpAddress+" rtcpAddress:"+p.rtcpAddress);
- }
-
- Iterator<Participant> iter = receivers.iterator();
- while(iter.hasNext()) {
- p = iter.next();
- System.out.println(" receivers: "+p.rtpAddress.toString());
- }
- }
-}