--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jlibrtp/RtcpPktRR.java Sat Mar 14 22:15:41 2009 +0100
@@ -0,0 +1,222 @@
+/**
+ * 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;
+
+/**
+ * RTCP packets for Receiver Reports
+ *
+ * @author Arne Kepp
+ */
+public class RtcpPktRR extends RtcpPkt {
+ /** Array of participants to send Receiver Reports to */
+ protected Participant[] reportees = null;
+ /** SSRC of participants the reports are for */
+ protected long[] reporteeSsrc = null;// -1; //32 bits
+ /** Fraction (over 256) of packets lost */
+ protected int[] lossFraction = null;//-1; //8 bits
+ /** Number of lost packets */
+ protected int[] lostPktCount = null;//-1; //24 bits
+ /** Extended highest sequence received */
+ protected long[] extHighSeqRecv = null;//-1; //32 bits
+ /** Interarrival jitter*/
+ protected long[] interArvJitter = null;//-1; //32 bits
+ /** Middle 32 bits of NTP when last SR was received */
+ protected long[] timeStampLSR = null;//-1; //32 bits
+ /** Delay on last SRC */
+ protected long[] delaySR = null;//-1; //32 bits
+
+ /**
+ * Constructor for a packet with receiver reports
+ *
+ * @param reportees the participants on which to generate reports
+ * @param ssrc the SSRC of the sender, from the RTPSession
+ */
+ protected RtcpPktRR(Participant[] reportees, long ssrc) {
+ super.packetType = 201;
+ // Fetch all the right stuff from the database
+ super.ssrc = ssrc;
+ this.reportees = reportees;
+ }
+
+
+ /**
+ *
+ *
+ * If rcount < 0 we assume we have to parse the entire packet,
+ * otherwise we'll just parse the receiver report blocks
+ * (ie. the data came from a Sender Report packet)
+ *
+ * @param aRawPkt the byte[] with the report(s)
+ * @param start where in the raw packet to start reading
+ * @param rrCount the number of receiver reports, -1 if this does not come from an SR
+ */
+ protected RtcpPktRR(byte[] aRawPkt, int start, int rrCount) {
+ //System.out.println("RtcpPktRR: " + rrCount + " start: " + start);
+ super.rawPkt = aRawPkt;
+
+ if(rrCount < 0 && (!super.parseHeaders(start) || packetType != 201 || super.length < 1)) {
+ if(RTPSession.rtpDebugLevel > 2) {
+ System.out.println(" <-> RtcpPktRR.parseHeaders() etc. problem: "+(!super.parseHeaders(start))+" "+packetType+" "+super.length);
+ }
+ super.problem = -201;
+ }
+
+ int base;
+ if(rrCount > 0) {
+ base = start + 28;
+ } else {
+ base = start + 8;
+ rrCount = super.itemCount;
+ super.ssrc = StaticProcs.bytesToUIntLong(aRawPkt, start + 4);
+ }
+
+ if(rrCount > 0) {
+ reporteeSsrc = new long[rrCount];
+ lossFraction = new int[rrCount];
+ lostPktCount = new int[rrCount];
+ extHighSeqRecv = new long[rrCount];
+ interArvJitter = new long[rrCount];
+ timeStampLSR = new long[rrCount];
+ delaySR = new long[rrCount];
+
+ for(int i=0; i<rrCount; i++ ) {
+ int pos = base + i*24;
+ reporteeSsrc[i] = StaticProcs.bytesToUIntLong(aRawPkt, pos);
+ lossFraction[i] = (int) aRawPkt[pos + 4];
+ aRawPkt[pos + 4] = (byte) 0;
+ lostPktCount[i] = (int) StaticProcs.bytesToUIntLong(aRawPkt, pos + 4);
+ extHighSeqRecv[i] = StaticProcs.bytesToUIntLong(aRawPkt, pos + 8);
+ interArvJitter[i] = StaticProcs.bytesToUIntLong(aRawPkt, pos + 12);
+ timeStampLSR[i] = StaticProcs.bytesToUIntLong(aRawPkt, pos + 16);
+ delaySR[i] = StaticProcs.bytesToUIntLong(aRawPkt, pos + 20);
+ }
+ }
+ }
+
+ /**
+ * Encode the packet into a byte[], saved in .rawPkt
+ *
+ * CompRtcpPkt will call this automatically
+ */
+ protected void encode() {
+ if(RTPSession.rtpDebugLevel > 9) {
+ System.out.println(" -> RtcpPktRR.encode()");
+ }
+
+ byte[] rRs = null;
+ //Gather up the actual receiver reports
+ if(this.reportees != null) {
+ rRs = this.encodeRR();
+ super.rawPkt = new byte[rRs.length + 8];
+ System.arraycopy(rRs, 0, super.rawPkt, 8, rRs.length);
+ super.itemCount = reportees.length;
+ } else {
+ super.rawPkt = new byte[8];
+ super.itemCount = 0;
+ }
+
+ //Write the common header
+ super.writeHeaders();
+
+ //Add our SSRC (as sender)
+ byte[] someBytes;
+ someBytes = StaticProcs.uIntLongToByteWord(super.ssrc);
+ System.arraycopy(someBytes, 0, super.rawPkt, 4, 4);
+
+ if(RTPSession.rtpDebugLevel > 9) {
+ System.out.println(" <- RtcpPktRR.encode()");
+ }
+
+ }
+
+ /**
+ * Encodes the individual Receiver Report blocks,
+ *
+ * so they can be used either in RR packets or appended to SR
+ *
+ * @return the encoded packets
+ */
+ protected byte[] encodeRR() {
+ if(RTPSession.rtpDebugLevel > 10) {
+ System.out.println(" -> RtcpPktRR.encodeRR()");
+ }
+ //assuming we will always create complete reports:
+ byte[] ret = new byte[24*reportees.length];
+
+ //Write SR stuff
+ for(int i = 0; i<reportees.length; i++) {
+ int offset = 24*i;
+ byte[] someBytes = StaticProcs.uIntLongToByteWord(reportees[i].ssrc);
+ System.arraycopy(someBytes, 0, ret, offset, 4);
+
+ //Cumulative number of packets lost
+ someBytes = StaticProcs.uIntLongToByteWord(reportees[i].getLostPktCount());
+
+ someBytes[0] = (byte) reportees[i].getFractionLost();
+
+ //Write Cumulative number of packets lost and loss fraction to packet:
+ System.arraycopy(someBytes, 0, ret, 4 + offset, 4);
+
+ // Extended highest sequence received
+ someBytes = StaticProcs.uIntLongToByteWord(reportees[i].getExtHighSeqRecv());
+ System.arraycopy(someBytes, 0, ret, 8 + offset, 4);
+
+ // Interarrival jitter
+ if(reportees[i].interArrivalJitter >= 0) {
+ someBytes = StaticProcs.uIntLongToByteWord((long)reportees[i].interArrivalJitter);
+ } else {
+ someBytes = StaticProcs.uIntLongToByteWord((long) 0);
+ }
+ System.arraycopy(someBytes, 0, ret, 12 + offset, 4);
+
+ // Timestamp last sender report received
+ someBytes = StaticProcs.uIntLongToByteWord(reportees[i].timeStampLSR);
+ System.arraycopy(someBytes, 0, ret, 16 + offset, 4);
+
+ // Delay since last sender report received, in terms of 1/655536 s = 0.02 ms
+ if(reportees[i].timeReceivedLSR > 0) {
+ someBytes = StaticProcs.uIntLongToByteWord(reportees[i].delaySinceLastSR());
+ } else {
+ someBytes = StaticProcs.uIntLongToByteWord(0);
+ }
+ System.arraycopy(someBytes, 0, ret, 20 + offset, 4);
+ }
+ if(RTPSession.rtpDebugLevel > 10) {
+ System.out.println(" <- RtcpPktRR.encodeRR()");
+ }
+ return ret;
+ }
+
+ /**
+ * Debug purposes only
+ */
+ public void debugPrint() {
+ System.out.println("RtcpPktRR.debugPrint() ");
+ if(reportees != null) {
+ for(int i= 0; i<reportees.length; i++) {
+ Participant part = reportees[i];
+ System.out.println(" part.ssrc: " + part.ssrc + " part.cname: " + part.cname);
+ }
+ } else {
+ for(int i=0;i<reporteeSsrc.length; i++) {
+ System.out.println(" reporteeSSRC: " + reporteeSsrc[i] + " timeStampLSR: " + timeStampLSR[i]);
+ }
+ }
+ }
+}