--- a/src/jlibrtp/RTCPReceiverThread.java Thu May 28 14:26:06 2009 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,369 +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.io.IOException;
-import java.net.DatagramPacket;
-import java.net.InetSocketAddress;
-import java.util.Enumeration;
-import java.util.Iterator;
-
-/**
- * This thread hangs on the RTCP socket and waits for new packets
- *
- * @author Arne Kepp
- *
- */
-public class RTCPReceiverThread extends Thread {
- /** Parent RTP Session */
- private RTPSession rtpSession = null;
- /** Parent RTCP Session */
- private RTCPSession rtcpSession = null;
-
- /**
- * Constructor for new thread
- * @param rtcpSession parent RTCP session
- * @param rtpSession parent RTP session
- */
- RTCPReceiverThread(RTCPSession rtcpSession, RTPSession rtpSession) {
- this.rtpSession = rtpSession;
- this.rtcpSession = rtcpSession;
-
- if(RTPSession.rtpDebugLevel > 1) {
- System.out.println("<-> RTCPReceiverThread created");
- }
-
- }
-
- /**
- * Find out whether a participant with this SSRC is known.
- *
- * If the user is unknown, and the system is operating in unicast mode,
- * try to match the ip-address of the sender to the ip address of a
- * previously unmatched target
- *
- * @param ssrc the SSRC of the participant
- * @param packet the packet that notified us
- * @return the relevant participant, possibly newly created
- */
- private Participant findParticipant(long ssrc, DatagramPacket packet) {
- Participant p = rtpSession.partDb.getParticipant(ssrc);
- if(p == null) {
- Enumeration<Participant> enu = rtpSession.partDb.getParticipants();
- while(enu.hasMoreElements()) {
- Participant tmp = (Participant) enu.nextElement();
- if(tmp.ssrc < 0 &&
- (tmp.rtcpAddress.getAddress().equals(packet.getAddress())
- || tmp.rtpAddress.getAddress().equals(packet.getAddress()))) {
-
- // Best guess
- System.out.println("RTCPReceiverThread: Got an unexpected packet from SSRC:"
- + ssrc + " @" + packet.getAddress().toString() + ", WAS able to match it." );
-
- tmp.ssrc = ssrc;
- return tmp;
- }
- }
- // Create an unknown sender
- System.out.println("RTCPReceiverThread: Got an unexpected packet from SSRC:"
- + ssrc + " @" + packet.getAddress().toString() + ", was NOT able to match it." );
- p = new Participant((InetSocketAddress) null, (InetSocketAddress) packet.getSocketAddress(), ssrc);
- rtpSession.partDb.addParticipant(2,p);
- }
- return p;
- }
-
-
- /**
- * Parse a received UDP packet
- *
- * Perform the header checks and extract the RTCP packets in it
- *
- * @param packet the packet to be parsed
- * @return -1 if there was a problem, 0 if successfully parsed
- */
- private int parsePacket(DatagramPacket packet) {
-
- if(packet.getLength() % 4 != 0) {
- if(RTPSession.rtcpDebugLevel > 2) {
- System.out.println("RTCPReceiverThread.parsePacket got packet that had length " + packet.getLength());
- }
- return -1;
- } else {
- byte[] rawPkt = packet.getData();
-
- // Parse the received compound RTCP (?) packet
- CompRtcpPkt compPkt = new CompRtcpPkt(rawPkt, packet.getLength(),
- (InetSocketAddress) packet.getSocketAddress(), rtpSession);
-
- if(this.rtpSession.debugAppIntf != null) {
- String intfStr;
-
- if(rtpSession.mcSession) {
- intfStr = this.rtcpSession.rtcpMCSock.getLocalSocketAddress().toString();
- } else {
- intfStr = this.rtpSession.rtpSock.getLocalSocketAddress().toString();
- }
-
- if( compPkt.problem == 0) {
- String str = new String("Received compound RTCP packet of size " + packet.getLength() +
- " from " + packet.getSocketAddress().toString() + " via " + intfStr
- + " containing " + compPkt.rtcpPkts.size() + " packets" );
-
- this.rtpSession.debugAppIntf.packetReceived(1,
- (InetSocketAddress) packet.getSocketAddress(), str);
- } else {
- String str = new String("Received invalid RTCP packet of size " + packet.getLength() +
- " from " + packet.getSocketAddress().toString() + " via " + intfStr
- + ": " + this.debugErrorString(compPkt.problem) );
-
- this.rtpSession.debugAppIntf.packetReceived(-2,
- (InetSocketAddress) packet.getSocketAddress(), str);
- }
- }
-
- if(RTPSession.rtcpDebugLevel > 5) {
- Iterator<RtcpPkt> iter = compPkt.rtcpPkts.iterator();
- String str = " ";
- while(iter.hasNext()) {
- RtcpPkt aPkt = iter.next();
- str += (aPkt.getClass().toString() + ":"+aPkt.itemCount+ ", ");
- }
- System.out.println("<-> RTCPReceiverThread.parsePacket() from " + packet.getSocketAddress().toString() + str);
- }
-
-
- //Loop over the information
- Iterator iter = compPkt.rtcpPkts.iterator();
-
- long curTime = System.currentTimeMillis();
-
- while(iter.hasNext()) {
- RtcpPkt aPkt = (RtcpPkt) iter.next();
-
- // Our own packets should already have been filtered out.
- if(aPkt.ssrc == rtpSession.ssrc) {
- System.out.println("RTCPReceiverThread() received RTCP packet"
- + " with conflicting SSRC from " + packet.getSocketAddress().toString());
- rtpSession.resolveSsrcConflict();
- return -1;
- }
-
- /** Receiver Reports **/
- if( aPkt.getClass() == RtcpPktRR.class) {
- RtcpPktRR rrPkt = (RtcpPktRR) aPkt;
-
- Participant p = findParticipant(rrPkt.ssrc, packet);
- p.lastRtcpPkt = curTime;
-
- if(rtpSession.rtcpAppIntf != null) {
- rtpSession.rtcpAppIntf.RRPktReceived(rrPkt.ssrc, rrPkt.reporteeSsrc,
- rrPkt.lossFraction, rrPkt.lostPktCount, rrPkt.extHighSeqRecv,
- rrPkt.interArvJitter, rrPkt.timeStampLSR, rrPkt.delaySR);
- }
-
- /** Sender Reports **/
- } else if(aPkt.getClass() == RtcpPktSR.class) {
- RtcpPktSR srPkt = (RtcpPktSR) aPkt;
-
- Participant p = findParticipant(srPkt.ssrc, packet);
- p.lastRtcpPkt = curTime;
-
- if(p != null) {
-
- if(p.ntpGradient < 0 && p.lastNtpTs1 > -1) {
- //Calculate gradient NTP vs RTP
- long newTime = StaticProcs.undoNtpMess(srPkt.ntpTs1, srPkt.ntpTs2);
- p.ntpGradient = ((double) (newTime - p.ntpOffset))/((double) srPkt.rtpTs - p.lastSRRtpTs);
- if(RTPSession.rtcpDebugLevel > 4) {
- System.out.println("RTCPReceiverThread calculated NTP vs RTP gradient: " + Double.toString(p.ntpGradient));
- }
- } else {
- // Calculate sum of ntpTs1 and ntpTs2 in milliseconds
- p.ntpOffset = StaticProcs.undoNtpMess(srPkt.ntpTs1, srPkt.ntpTs2);
- p.lastNtpTs1 = srPkt.ntpTs1;
- p.lastNtpTs2 = srPkt.ntpTs2;
- p.lastSRRtpTs = srPkt.rtpTs;
- }
-
- // For the next RR
- p.timeReceivedLSR = curTime;
- p.setTimeStampLSR(srPkt.ntpTs1,srPkt.ntpTs2);
-
- }
-
-
- if(rtpSession.rtcpAppIntf != null) {
- if(srPkt.rReports != null) {
- rtpSession.rtcpAppIntf.SRPktReceived(srPkt.ssrc, srPkt.ntpTs1, srPkt.ntpTs2,
- srPkt.rtpTs, srPkt.sendersPktCount, srPkt.sendersPktCount,
- srPkt.rReports.reporteeSsrc, srPkt.rReports.lossFraction, srPkt.rReports.lostPktCount,
- srPkt.rReports.extHighSeqRecv, srPkt.rReports.interArvJitter, srPkt.rReports.timeStampLSR,
- srPkt.rReports.delaySR);
- } else {
- rtpSession.rtcpAppIntf.SRPktReceived(srPkt.ssrc, srPkt.ntpTs1, srPkt.ntpTs2,
- srPkt.rtpTs, srPkt.sendersPktCount, srPkt.sendersPktCount,
- null, null, null,
- null, null, null,
- null);
- }
- }
-
- /** Source Descriptions **/
- } else if(aPkt.getClass() == RtcpPktSDES.class) {
- RtcpPktSDES sdesPkt = (RtcpPktSDES) aPkt;
-
- // The the participant database is updated
- // when the SDES packet is reconstructed by CompRtcpPkt
- if(rtpSession.rtcpAppIntf != null) {
- rtpSession.rtcpAppIntf.SDESPktReceived(sdesPkt.participants);
- }
-
- /** Bye Packets **/
- } else if(aPkt.getClass() == RtcpPktBYE.class) {
- RtcpPktBYE byePkt = (RtcpPktBYE) aPkt;
-
- long time = System.currentTimeMillis();
- Participant[] partArray = new Participant[byePkt.ssrcArray.length];
-
- for(int i=0; i<byePkt.ssrcArray.length; i++) {
- partArray[i] = rtpSession.partDb.getParticipant(byePkt.ssrcArray[i]);
- if(partArray[i] != null)
- partArray[i].timestampBYE = time;
- }
-
- if(rtpSession.rtcpAppIntf != null) {
- rtpSession.rtcpAppIntf.BYEPktReceived(partArray, new String(byePkt.reason));
- }
-
- /** Application specific Packets **/
- } else if(aPkt.getClass() == RtcpPktAPP.class) {
- RtcpPktAPP appPkt = (RtcpPktAPP) aPkt;
-
- Participant part = findParticipant(appPkt.ssrc, packet);
-
- if(rtpSession.rtcpAppIntf != null) {
- rtpSession.rtcpAppIntf.APPPktReceived(part, appPkt.itemCount, appPkt.pktName, appPkt.pktData);
- }
- }
-
-
-
- }
- }
- return 0;
- }
-
- /**
- * Returns a legible message when an error occurs
- *
- * @param errorCode the internal error code, commonly negative of packet type
- * @return a string that is hopefully somewhat informative
- */
- private String debugErrorString(int errorCode) {
- String aStr = "";
- switch(errorCode) {
- case -1: aStr = "The first packet was not of type SR or RR."; break;
- case -2: aStr = "The padding bit was set for the first packet."; break;
- case -200: aStr = " Error parsing Sender Report packet."; break;
- case -201: aStr = " Error parsing Receiver Report packet."; break;
- case -202: aStr = " Error parsing SDES packet"; break;
- case -203: aStr = " Error parsing BYE packet."; break;
- case -204: aStr = " Error parsing Application specific packet."; break;
- case -205: aStr = " Error parsing RTP Feedback packet."; break;
- case -206: aStr = " Error parsing Payload-Specific Feedback packet."; break;
- default:
- aStr = "Unknown error code " + errorCode + ".";
- }
-
- return aStr;
- }
-
- /**
- * Start the RTCP receiver thread.
- *
- * It will
- * 1) run when it receives a packet
- * 2) parse the packet
- * 3) call any relevant callback functions, update database
- * 4) block until the next one arrives.
- */
- public void run() {
- if(RTPSession.rtcpDebugLevel > 1) {
- if(rtpSession.mcSession) {
- System.out.println("-> RTCPReceiverThread.run() starting on MC " + rtcpSession.rtcpMCSock.getLocalPort() );
- } else {
- System.out.println("-> RTCPReceiverThread.run() starting on " + rtcpSession.rtcpSock.getLocalPort() );
- }
- }
-
- while(!rtpSession.endSession) {
-
- if(RTPSession.rtcpDebugLevel > 4) {
- if(rtpSession.mcSession) {
- System.out.println("-> RTCPReceiverThread.run() waiting for packet on MC " + rtcpSession.rtcpMCSock.getLocalPort() );
- } else {
- System.out.println("-> RTCPReceiverThread.run() waiting for packet on " + rtcpSession.rtcpSock.getLocalPort() );
- }
- }
-
- // Prepare a packet
- byte[] rawPkt = new byte[1500];
- DatagramPacket packet = new DatagramPacket(rawPkt, rawPkt.length);
-
- // Wait for it to arrive
- if(! rtpSession.mcSession) {
- //Unicast
- try {
- rtcpSession.rtcpSock.receive(packet);
- } catch (IOException e) {
- if(!rtpSession.endSession) {
- e.printStackTrace();
- } else {
- continue;
- }
- }
- } else {
- //Multicast
- try {
- rtcpSession.rtcpMCSock.receive(packet);
- } catch (IOException e) {
- if(!rtpSession.endSession) {
- e.printStackTrace();
- } else {
- continue;
- }
- }
- }
-
- // Check whether this is one of our own
- if( (rtpSession.mcSession && ! packet.getSocketAddress().equals(rtcpSession.rtcpMCSock) )
- || ! packet.getSocketAddress().equals(rtcpSession.rtcpSock) ) {
- //System.out.println("Packet received from: " + packet.getSocketAddress().toString());
- parsePacket(packet);
- //rtpSession.partDb.debugPrint();
- }
- }
-
- if(RTPSession.rtcpDebugLevel > 1) {
- System.out.println("<-> RTCPReceiverThread terminating");
- }
- }
-
-}