--- a/src/jlibrtp/RtcpPktPSFB.java Thu May 28 14:26:06 2009 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,395 +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 Payload-Specific Feedback Messages
- *
- * @author Arne Kepp
- */
-public class RtcpPktPSFB extends RtcpPkt {
- /** If this packet was for a different SSRC */
- protected boolean notRelevant = false;
- /** Parent RTP Session */
- private RTPSession rtpSession;
- /** SSRC we are sending feeback to */
- protected long ssrcMediaSource = -1;
-
- /** SLI macroblock (MB) address of the first lost macroblock number */
- protected int[] sliFirst;
- /** SLI number of lost macroblocks */
- protected int[] sliNumber;
- /** SLI six least significant bits of the codec-specific identifier */
- protected int[] sliPictureId;
-
- // Picture loss indication
- /** RPSI number of padded bits at end of bitString */
- protected int rpsiPadding = -1;
- /** RPSI payloadType RTP payload type */
- protected int rpsiPayloadType = -1;
- /** RPSI information as natively defined by the video codec */
- protected byte[] rpsiBitString;
-
- /** Application Layer Feedback Message */
- protected byte[] alfBitString;
-
- /**
- * Generic constructor, then call make<something>
- *
- * @param ssrcPacketSender
- * @param ssrcMediaSource
- */
- protected RtcpPktPSFB(long ssrcPacketSender, long ssrcMediaSource) {
- super.ssrc = ssrcPacketSender;
- this.ssrcMediaSource = ssrcMediaSource;
- super.packetType = 206; //PSFB
- }
-
- /**
- * Make this packet a Picture loss indication
- */
- protected void makePictureLossIndication() {
- super.itemCount = 1; //FMT
- }
-
- /**
- * Make this packet a Slice Loss Indication
- *
- * @param sliFirst macroblock (MB) address of the first lost macroblock
- * @param sliNumber number of lost macroblocks
- * @param sliPictureId six least significant bits of the codec-specific identifier
- */
- protected void makeSliceLossIndication(int[] sliFirst, int[] sliNumber, int[] sliPictureId) {
- super.itemCount = 2; //FMT
- this.sliFirst = sliFirst;
- this.sliNumber = sliNumber;
- this.sliPictureId = sliPictureId;
- }
-
- /**
- * Make this packet a Reference Picture Selection Indication
- *
- * @param bitPadding number of padded bits at end of bitString
- * @param payloadType RTP payload type for codec
- * @param bitString RPSI information as natively defined by the video codec
- */
- protected void makeRefPictureSelIndic(int bitPadding, int payloadType, byte[] bitString) {
- super.itemCount = 3; //FMT
- this.rpsiPadding = bitPadding;
- this.rpsiPayloadType = payloadType;
- this.rpsiBitString = bitString;
- }
-
- /**
- * Make this packet an Application specific feedback message
- *
- * @param bitString the original application message
- */
- protected void makeAppLayerFeedback(byte[] bitString) {
- super.itemCount = 15; //FMT
- this.alfBitString = bitString;
- }
-
- /**
- * 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 RtcpPktPSFB(byte[] aRawPkt, int start, RTPSession rtpSession) {
- if(RTPSession.rtpDebugLevel > 8) {
- System.out.println(" -> RtcpPktPSFB(byte[], int start)");
- }
- this.rtpSession = rtpSession;
-
- rawPkt = aRawPkt;
-
- if(! super.parseHeaders(start) || packetType != 206 || super.length < 2 ) {
- if(RTPSession.rtpDebugLevel > 2) {
- System.out.println(" <-> RtcpPktRTPFB.parseHeaders() etc. problem");
- }
- super.problem = -206;
- } else {
- //FMT = super.itemCount;
- ssrcMediaSource = StaticProcs.bytesToUIntLong(aRawPkt,8+start);
-
- if(ssrcMediaSource == rtpSession.ssrc) {
- super.ssrc = StaticProcs.bytesToUIntLong(aRawPkt,4+start);
-
- switch(super.itemCount) {
- case 1: // Picture Loss Indication
- decPictureLossIndic();
- break;
- case 2: // Slice Loss Indication
- decSliceLossIndic(aRawPkt, start + 12);
- break;
- case 3: // Reference Picture Selection Indication
- decRefPictureSelIndic(aRawPkt, start + 12);
- break;
- case 15: // Application Layer Feedback Messages
- decAppLayerFB(aRawPkt, start + 12);
- break;
- default:
- System.out.println("!!!! RtcpPktPSFB(byte[], int start) unexpected FMT " + super.itemCount);
- }
- } else {
- this.notRelevant = true;
- }
- }
- if(RTPSession.rtpDebugLevel > 8) {
- System.out.println(" <- RtcpPktPSFB()");
- }
- }
-
- /**
- * Decode Picture Loss indication
- *
- */
- private void decPictureLossIndic() {
- if(this.rtpSession.rtcpAVPFIntf != null) {
- this.rtpSession.rtcpAVPFIntf.PSFBPktPictureLossReceived(
- super.ssrc);
- }
- }
-
- /**
- * Decode Slice Loss Indication
- *
- * @param aRawPkt
- * @param start
- */
- private void decSliceLossIndic(byte[] aRawPkt, int start) {
- // 13 bit off-boundary numbers? That's rather cruel
- // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | First | Number | PictureID |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
- int count = super.length - 2;
-
- sliFirst = new int[count];
- sliNumber = new int[count];
- sliPictureId = new int[count];
-
- // Loop over the FCI lines
- for(int i=0; i < count; i++) {
- sliFirst[i] = StaticProcs.bytesToUIntInt(aRawPkt, start) >> 3;
- sliNumber[i] = (int) (StaticProcs.bytesToUIntInt(aRawPkt, start) & 0x0007FFC0) >> 6;
- sliPictureId[i] = (StaticProcs.bytesToUIntInt(aRawPkt, start + 2) & 0x003F);
- start += 4;
- }
-
- if(this.rtpSession.rtcpAVPFIntf != null) {
- this.rtpSession.rtcpAVPFIntf.PSFBPktSliceLossIndic(
- super.ssrc,
- sliFirst, sliNumber, sliPictureId);
- }
- }
-
- /**
- * Decode Reference Picture Selection Indication
- *
- * @param aRawPkt
- * @param start
- */
- private void decRefPictureSelIndic(byte[] aRawPkt, int start) {
- // 0 1 2 3
- // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | PB |0| Payload Type| Native RPSI bit string |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | defined per codec ... | Padding (0) |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
- rpsiPadding = aRawPkt[start];
-
- if(rpsiPadding > 32) {
- System.out.println("!!!! RtcpPktPSFB.decRefPictureSelcIndic paddingBits: "
- + rpsiPadding);
- }
-
- rpsiPayloadType = (int) rawPkt[start];
- if(rpsiPayloadType < 0) {
- System.out.println("!!!! RtcpPktPSFB.decRefPictureSelcIndic 8th bit not zero: "
- + rpsiPayloadType);
- }
-
- rpsiBitString = new byte[(super.length - 2)*4 - 2];
- System.arraycopy(aRawPkt, start + 2, rpsiBitString, 0, rpsiBitString.length);
-
- if(this.rtpSession.rtcpAVPFIntf != null) {
- this.rtpSession.rtcpAVPFIntf.PSFBPktRefPictureSelIndic(
- super.ssrc,
- rpsiPayloadType, rpsiBitString, rpsiPadding);
- }
-
- }
-
- /**
- * Decode Application specific feedback message
- *
- * @param aRawPkt
- * @param start
- */
- private void decAppLayerFB(byte[] aRawPkt, int start) {
- //Application Message (FCI): variable length
- int stringLength = (super.length - 2)*4;
-
- alfBitString = new byte[stringLength];
-
- System.arraycopy(aRawPkt, start, alfBitString, 0, stringLength);
-
- if(this.rtpSession.rtcpAVPFIntf != null) {
- this.rtpSession.rtcpAVPFIntf.PSFBPktAppLayerFBReceived(
- super.ssrc, alfBitString);
- }
- }
-
-
-
- /**
- * Encode a Slice Loss Indication
- */
- private void encSliceLossIndic() {
- byte[] firstBytes;
- byte[] numbBytes;
- byte[] picBytes;
-
- int offset = 8;
- // Loop over the FCI lines
- for(int i=0; i < sliFirst.length; i++) {
- offset = 8 + 8*i;
- firstBytes = StaticProcs.uIntLongToByteWord(sliFirst[i] << 3);
- numbBytes = StaticProcs.uIntLongToByteWord(sliNumber[i] << 2);
- picBytes = StaticProcs.uIntIntToByteWord(sliPictureId[i]);
-
- super.rawPkt[offset] = firstBytes[2];
- super.rawPkt[offset+1] = (byte) (firstBytes[3] | numbBytes[2]);
- super.rawPkt[offset+2] = numbBytes[3];
- super.rawPkt[offset+3] = (byte) (numbBytes[3] | picBytes[1]);
- }
- }
-
- /**
- * Encode a Reference Picture Selection Indication
- *
- */
- private void encRefPictureSelIndic() {
- byte[] someBytes;
- someBytes = StaticProcs.uIntIntToByteWord(rpsiPadding);
- super.rawPkt[8] = someBytes[1];
- someBytes = StaticProcs.uIntIntToByteWord(rpsiPayloadType);
- super.rawPkt[9] = someBytes[1];
-
- System.arraycopy(rpsiBitString, 0, super.rawPkt, 10, rpsiBitString.length);
- }
-
-
- /**
- * Encode Application Layer Feedback
- *
- */
- private void encAppLayerFB() {
- //Application Message (FCI): variable length
- System.arraycopy(alfBitString, 0, super.rawPkt, 8, alfBitString.length);
- }
-
- /**
- * Get the FMT (Feedback Message Type)
- * @return value stored in .itemcount, same field
- */
- protected int getFMT() {
- return this.itemCount;
- }
-
- /**
- * Encode the packet into a byte[], saved in .rawPkt
- *
- * CompRtcpPkt will call this automatically
- */
- protected void encode() {
- switch(super.itemCount) {
- case 1: // Picture Loss Indication
- //Nothing to do really
- super.rawPkt = new byte[24];
- break;
- case 2: // Slice Loss Indication
- super.rawPkt = new byte[24 + 4*this.sliFirst.length];
- encSliceLossIndic();
- break;
- case 3: // Reference Picture Selection Indication
- super.rawPkt = new byte[24 + 2 + this.rpsiBitString.length/4];
- encRefPictureSelIndic();
- break;
- case 15: // Application Layer Feedback Messages
- super.rawPkt = new byte[24 + this.alfBitString.length/4];
- encAppLayerFB();
- break;
- }
-
- 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);
-
- writeHeaders();
- }
-
- /**
- * Debug purposes only
- */
- public void debugPrint() {
- System.out.println("->RtcpPktPSFB.debugPrint() ");
-
- String str;
- switch(super.itemCount) {
- case 1: // Picture Loss Indication
- System.out.println(" FMT: Picture Loss Indication");
- break;
- case 2: // Slice Loss Indication
- if(sliFirst != null) {
- str = "sliFirst[].length: " + sliFirst.length;
- } else {
- str = "sliFirst[] is null";
- }
- System.out.println(" FMT: Slice Loss Indication, " + str);
- break;
- case 3: // Reference Picture Selection Indication
- if(rpsiBitString != null) {
- str = "rpsiBitString[].length: " + rpsiBitString.length;
- } else {
- str = "rpsiBitString[] is null";
- }
- System.out.println(" FMT: Reference Picture Selection Indication, "
- + str + " payloadType: " + this.rpsiPayloadType);
- break;
- case 15: // Application Layer Feedback Messages
- if(alfBitString != null) {
- str = "alfBitString[].length: " + alfBitString.length;
- } else {
- str = "alfBitString[] is null";
- }
- System.out.println(" FMT: Application Layer Feedback Messages, " + str);
- break;
- }
-
- System.out.println("<-RtcpPktPSFB.debugPrint() ");
- }
-}