diff -r 9bdff6cbd120 -r 2bf440c54ca5 src/jlibrtp/RtcpPktRTPFB.java --- a/src/jlibrtp/RtcpPktRTPFB.java Thu May 28 14:26:06 2009 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,154 +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; - -/** - * RTCP packets for RTP Feedback Messages - * - * In line with RFC 4585, this packet currently only supports NACKs - * - * @author Arne Kepp - */ -public class RtcpPktRTPFB extends RtcpPkt { - /** If this packet was for a different SSRC */ - protected boolean notRelevant = false; - /** SSRC we are sending feeback to */ - protected long ssrcMediaSource = -1; - /** RTP sequence numbers of lost packets */ - protected int PID[]; - /** bitmask of following lost packets, shared index with PID */ - protected int BLP[]; - - /** - * Constructor for RTP Feedback Message - * - * @param ssrcPacketSender SSRC of sender, taken from RTPSession - * @param ssrcMediaSource SSRC of recipient of this message - * @param FMT the Feedback Message Subtype - * @param PID RTP sequence numbers of lost packets - * @param BLP bitmask of following lost packets, shared index with PID - */ - protected RtcpPktRTPFB(long ssrcPacketSender, long ssrcMediaSource, int FMT, int[] PID, int[] BLP) { - super.packetType = 205; //RTPFB - super.itemCount = FMT; - this.PID = PID; - this.BLP = BLP; - } - - /** - * Constructor that parses a raw packet to retrieve information - * - * @param aRawPkt the raw packet to be parsed - * @param start the start of the packet, in bytes - * @param rtpSession the session on which the callback interface resides - */ - protected RtcpPktRTPFB(byte[] aRawPkt, int start, RTPSession rtpSession) { - if(RTPSession.rtpDebugLevel > 8) { - System.out.println(" -> RtcpPktRTPFB(byte[], int start)"); - } - - rawPkt = aRawPkt; - - if(! super.parseHeaders(start) || packetType != 205 || super.length < 2) { - if(RTPSession.rtpDebugLevel > 2) { - System.out.println(" <-> RtcpPktRTPFB.parseHeaders() etc. problem"); - } - super.problem = -205; - } else { - //FMT = super.itemCount; - - ssrcMediaSource = StaticProcs.bytesToUIntLong(aRawPkt,8+start); - - if(ssrcMediaSource == rtpSession.ssrc) { - super.ssrc = StaticProcs.bytesToUIntLong(aRawPkt,4+start); - int loopStop = super.length - 2; - PID = new int[loopStop]; - BLP = new int[loopStop]; - int curStart = 12; - - // Loop over Feedback Control Information (FCI) fields - for(int i=0; i< loopStop; i++) { - PID[i] = StaticProcs.bytesToUIntInt(aRawPkt, curStart); - BLP[i] = StaticProcs.bytesToUIntInt(aRawPkt, curStart + 2); - curStart += 4; - } - - rtpSession.rtcpAVPFIntf.RTPFBPktReceived( - super.ssrc, super.itemCount, PID, BLP); - } - } - - - - if(RTPSession.rtpDebugLevel > 8) { - System.out.println(" <- RtcpPktRTPFB()"); - } - } - - /** - * Encode the packet into a byte[], saved in .rawPkt - * - * CompRtcpPkt will call this automatically - */ - protected void encode() { - super.rawPkt = new byte[12 + this.PID.length*4]; - - byte[] someBytes = StaticProcs.uIntLongToByteWord(super.ssrc); - System.arraycopy(someBytes, 0, super.rawPkt, 4, 4); - someBytes = StaticProcs.uIntLongToByteWord(this.ssrcMediaSource); - System.arraycopy(someBytes, 0, super.rawPkt, 8, 4); - - // Loop over Feedback Control Information (FCI) fields - int curStart = 12; - for(int i=0; i < this.PID.length; i++ ) { - someBytes = StaticProcs.uIntIntToByteWord(PID[i]); - super.rawPkt[curStart++] = someBytes[0]; - super.rawPkt[curStart++] = someBytes[1]; - someBytes = StaticProcs.uIntIntToByteWord(BLP[i]); - super.rawPkt[curStart++] = someBytes[0]; - super.rawPkt[curStart++] = someBytes[1]; - } - writeHeaders(); - } - - /** - * Get the FMT (Feedback Message Type) - * @return value stored in .itemcount, same field - */ - protected int getFMT() { - return this.itemCount; - } - - /** - * Debug purposes only - */ - protected void debugPrint() { - System.out.println("->RtcpPktRTPFB.debugPrint() "); - System.out.println(" ssrcPacketSender: " + super.ssrc + " ssrcMediaSource: " + ssrcMediaSource); - - if(this.PID != null && this.PID.length < 1) { - System.out.println(" No Feedback Control Information (FCI) fields"); - } - - for(int i=0; i < this.PID.length; i++ ) { - System.out.println(" FCI -> PID: " + PID[i] + " BLP: " + BLP[i]); - } - System.out.println("<-RtcpPktRTPFB.debugPrint() "); - } -}