Example #1
0
  /**
   * Re-initializes the fields which store information about the currently held data. Empties
   * <tt>data</tt>.
   */
  private void reinit() {
    firstSeq = lastSeq = timestamp = -1;
    pictureId = -1;
    empty = true;
    haveEnd = haveStart = false;
    frameLength = 0;

    Iterator<Map.Entry<Long, Container>> it = data.entrySet().iterator();
    Map.Entry<Long, Container> e;
    while (it.hasNext()) {
      e = it.next();
      free.offer(e.getValue());
      it.remove();
    }
  }
  /**
   * Makes <tt>RTCPSDES</tt> packets for all the RTP streams that we're sending.
   *
   * @return a <tt>List</tt> of <tt>RTCPSDES</tt> packets for all the RTP streams that we're
   *     sending.
   */
  private RTCPSDESPacket makeSDESPacket() {
    Collection<RTCPSDES> sdesChunks = new ArrayList<RTCPSDES>();

    // Create an SDES for our own SSRC.
    RTCPSDES ownSDES = new RTCPSDES();

    SSRCInfo ourinfo = getStream().getStreamRTPManager().getSSRCCache().ourssrc;
    ownSDES.ssrc = (int) getLocalSSRC();
    Collection<RTCPSDESItem> ownItems = new ArrayList<RTCPSDESItem>();
    ownItems.add(new RTCPSDESItem(RTCPSDESItem.CNAME, ourinfo.sourceInfo.getCNAME()));

    // Throttle the source description bandwidth. See RFC3550#6.3.9
    // Allocation of Source Description Bandwidth.

    if (sdesCounter % 3 == 0) {
      if (ourinfo.name != null && ourinfo.name.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.NAME, ourinfo.name.getDescription()));
      if (ourinfo.email != null && ourinfo.email.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.EMAIL, ourinfo.email.getDescription()));
      if (ourinfo.phone != null && ourinfo.phone.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.PHONE, ourinfo.phone.getDescription()));
      if (ourinfo.loc != null && ourinfo.loc.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.LOC, ourinfo.loc.getDescription()));
      if (ourinfo.tool != null && ourinfo.tool.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.TOOL, ourinfo.tool.getDescription()));
      if (ourinfo.note != null && ourinfo.note.getDescription() != null)
        ownItems.add(new RTCPSDESItem(RTCPSDESItem.NOTE, ourinfo.note.getDescription()));
    }

    sdesCounter++;

    ownSDES.items = ownItems.toArray(new RTCPSDESItem[ownItems.size()]);

    sdesChunks.add(ownSDES);

    for (Map.Entry<Integer, byte[]> entry : cnameRegistry.entrySet()) {
      RTCPSDES sdes = new RTCPSDES();
      sdes.ssrc = entry.getKey();
      sdes.items = new RTCPSDESItem[] {new RTCPSDESItem(RTCPSDESItem.CNAME, entry.getValue())};
    }

    RTCPSDES[] sps = sdesChunks.toArray(new RTCPSDES[sdesChunks.size()]);
    RTCPSDESPacket sp = new RTCPSDESPacket(sps);

    return sp;
  }
  /**
   * Notifies this instance that the dynamic payload types of the associated {@link MediaStream}
   * have changed.
   */
  public void onDynamicPayloadTypesChanged() {
    rtxPayloadType = -1;
    rtxAssociatedPayloadType = -1;

    MediaStream mediaStream = channel.getStream();

    Map<Byte, MediaFormat> mediaFormatMap = mediaStream.getDynamicRTPPayloadTypes();

    Iterator<Map.Entry<Byte, MediaFormat>> it = mediaFormatMap.entrySet().iterator();

    while (it.hasNext() && rtxPayloadType == -1) {
      Map.Entry<Byte, MediaFormat> entry = it.next();
      MediaFormat format = entry.getValue();
      if (!Constants.RTX.equalsIgnoreCase(format.getEncoding())) {
        continue;
      }

      // XXX(gp) we freak out if multiple codecs with RTX support are
      // present.
      rtxPayloadType = entry.getKey();
      rtxAssociatedPayloadType = Byte.parseByte(format.getFormatParameters().get("apt"));
    }
  }
Example #4
0
  /** {@inheritDoc} */
  @Override
  protected int doProcess(Buffer inBuffer, Buffer outBuffer) {
    byte[] inData = (byte[]) inBuffer.getData();
    int inOffset = inBuffer.getOffset();

    if (!VP8PayloadDescriptor.isValid(inData, inOffset)) {
      logger.warn("Invalid RTP/VP8 packet discarded.");
      outBuffer.setDiscard(true);
      return BUFFER_PROCESSED_FAILED; // XXX: FAILED or OK?
    }

    long inSeq = inBuffer.getSequenceNumber();
    long inRtpTimestamp = inBuffer.getRtpTimeStamp();
    int inPictureId = VP8PayloadDescriptor.getPictureId(inData, inOffset);
    boolean inMarker = (inBuffer.getFlags() & Buffer.FLAG_RTP_MARKER) != 0;
    boolean inIsStartOfFrame = VP8PayloadDescriptor.isStartOfFrame(inData, inOffset);
    int inLength = inBuffer.getLength();
    int inPdSize = VP8PayloadDescriptor.getSize(inData, inOffset);
    int inPayloadLength = inLength - inPdSize;

    if (empty && lastSentSeq != -1 && seqNumComparator.compare(inSeq, lastSentSeq) != 1) {
      if (logger.isInfoEnabled()) logger.info("Discarding old packet (while empty) " + inSeq);
      outBuffer.setDiscard(true);
      return BUFFER_PROCESSED_OK;
    }

    if (!empty) {
      // if the incoming packet has a different PictureID or timestamp
      // than those of the current frame, then it belongs to a different
      // frame.
      if ((inPictureId != -1 && pictureId != -1 && inPictureId != pictureId)
          | (timestamp != -1 && inRtpTimestamp != -1 && inRtpTimestamp != timestamp)) {
        if (seqNumComparator.compare(inSeq, firstSeq) != 1) // inSeq <= firstSeq
        {
          // the packet belongs to a previous frame. discard it
          if (logger.isInfoEnabled()) logger.info("Discarding old packet " + inSeq);
          outBuffer.setDiscard(true);
          return BUFFER_PROCESSED_OK;
        } else // inSeq > firstSeq (and also presumably isSeq > lastSeq)
        {
          // the packet belongs to a subsequent frame (to the one
          // currently being held). Drop the current frame.

          if (logger.isInfoEnabled())
            logger.info(
                "Discarding saved packets on arrival of"
                    + " a packet for a subsequent frame: "
                    + inSeq);

          // TODO: this would be the place to complain about the
          // not-well-received PictureID by sending a RTCP SLI or NACK.
          reinit();
        }
      }
    }

    // a whole frame in a single packet. avoid the extra copy to
    // this.data and output it immediately.
    if (empty && inMarker && inIsStartOfFrame) {
      byte[] outData = validateByteArraySize(outBuffer, inPayloadLength, false);
      System.arraycopy(inData, inOffset + inPdSize, outData, 0, inPayloadLength);
      outBuffer.setOffset(0);
      outBuffer.setLength(inPayloadLength);
      outBuffer.setRtpTimeStamp(inBuffer.getRtpTimeStamp());

      if (TRACE) logger.trace("Out PictureID=" + inPictureId);

      lastSentSeq = inSeq;

      return BUFFER_PROCESSED_OK;
    }

    // add to this.data
    Container container = free.poll();
    if (container == null) container = new Container();
    if (container.buf == null || container.buf.length < inPayloadLength)
      container.buf = new byte[inPayloadLength];

    if (data.get(inSeq) != null) {
      if (logger.isInfoEnabled())
        logger.info("(Probable) duplicate packet detected, discarding " + inSeq);
      outBuffer.setDiscard(true);
      return BUFFER_PROCESSED_OK;
    }

    System.arraycopy(inData, inOffset + inPdSize, container.buf, 0, inPayloadLength);
    container.len = inPayloadLength;
    data.put(inSeq, container);

    // update fields
    frameLength += inPayloadLength;
    if (firstSeq == -1 || (seqNumComparator.compare(firstSeq, inSeq) == 1)) firstSeq = inSeq;
    if (lastSeq == -1 || (seqNumComparator.compare(inSeq, lastSeq) == 1)) lastSeq = inSeq;

    if (empty) {
      // the first received packet for the current frame was just added
      empty = false;
      timestamp = inRtpTimestamp;
      pictureId = inPictureId;
    }

    if (inMarker) haveEnd = true;
    if (inIsStartOfFrame) haveStart = true;

    // check if we have a full frame
    if (frameComplete()) {
      byte[] outData = validateByteArraySize(outBuffer, frameLength, false);
      int ptr = 0;
      Container b;
      for (Map.Entry<Long, Container> entry : data.entrySet()) {
        b = entry.getValue();
        System.arraycopy(b.buf, 0, outData, ptr, b.len);
        ptr += b.len;
      }

      outBuffer.setOffset(0);
      outBuffer.setLength(frameLength);
      outBuffer.setRtpTimeStamp(inBuffer.getRtpTimeStamp());

      if (TRACE) logger.trace("Out PictureID=" + inPictureId);
      lastSentSeq = lastSeq;

      // prepare for the next frame
      reinit();

      return BUFFER_PROCESSED_OK;
    } else {
      // frame not complete yet
      outBuffer.setDiscard(true);
      return OUTPUT_BUFFER_NOT_FILLED;
    }
  }