/**
  * Pools the specified <tt>RawPacket</tt> in order to avoid future allocations and to reduce the
  * effects of garbage collection.
  *
  * @param pkt the <tt>RawPacket</tt> to be offered to {@link #rawPacketPool}
  */
 private void poolRawPacket(RawPacket pkt) {
   pkt.setBuffer(null);
   pkt.setFlags(0);
   pkt.setLength(0);
   pkt.setOffset(0);
   rawPacketPool.offer(pkt);
 }
Beispiel #2
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      public int write(byte[] buffer, int offset, int length, boolean transform) {
        RawPacket pkt = rawPacketArray[0];
        if (pkt == null) pkt = new RawPacket();
        rawPacketArray[0] = pkt;

        byte[] pktBuf = pkt.getBuffer();
        if (pktBuf == null || pktBuf.length < length) {
          pktBuf = new byte[length];
          pkt.setBuffer(pktBuf);
        }
        System.arraycopy(buffer, offset, pktBuf, 0, length);
        pkt.setOffset(0);
        pkt.setLength(length);

        if (transform) {
          PacketTransformer packetTransformer =
              isControlStream ? rtcpPacketTransformer : rtpPacketTransformer;

          if (packetTransformer != null)
            rawPacketArray = packetTransformer.reverseTransform(rawPacketArray);
        }

        SourceTransferHandler transferHandler;
        PushSourceStream pushSourceStream;

        try {
          if (isControlStream) {
            transferHandler = controlTransferHandler;
            pushSourceStream = getControlInputStream();
          } else {
            transferHandler = dataTransferHandler;
            pushSourceStream = getDataInputStream();
          }
        } catch (IOException ioe) {
          throw new UndeclaredThrowableException(ioe);
        }

        for (int i = 0; i < rawPacketArray.length; i++) {
          RawPacket packet = rawPacketArray[i];

          // keep the first element for reuse
          if (i != 0) rawPacketArray[i] = null;

          if (packet != null) {
            if (isControlStream) pendingControlPacket = packet;
            else pendingDataPacket = packet;

            if (transferHandler != null) {
              transferHandler.transferData(pushSourceStream);
            }
          }
        }

        return length;
      }
Beispiel #3
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 private void handleRtpPacket(RawPacket pkt) {
   if (pkt != null && pkt.getPayloadType() == vp8PayloadType) {
     int ssrc = pkt.getSSRC();
     if (!activeVideoSsrcs.contains(ssrc & 0xffffffffL)) {
       synchronized (activeVideoSsrcs) {
         if (!activeVideoSsrcs.contains(ssrc & 0xffffffffL)) {
           activeVideoSsrcs.add(ssrc & 0xffffffffL);
           rtcpFeedbackSender.sendFIR(ssrc);
         }
       }
     }
   }
 }
Beispiel #4
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  private void emptyPacketBuffer(long ssrc) {
    RawPacket[] pkts = rtpConnector.packetBuffer.emptyBuffer(ssrc);
    RTPConnectorImpl.OutputDataStreamImpl dataStream;

    try {
      dataStream = rtpConnector.getDataOutputStream();
    } catch (IOException ioe) {
      logger.error("Failed to empty packet buffer for SSRC=" + ssrc + ": " + ioe);
      return;
    }
    for (RawPacket pkt : pkts)
      dataStream.write(
          pkt.getBuffer(), pkt.getOffset(), pkt.getLength(), false /* already transformed */);
  }
  /**
   * Creates a new <tt>RawPacket</tt> from a specific <tt>DatagramPacket</tt> in order to have this
   * instance receive its packet data through its {@link #read(byte[], int, int)} method. Returns an
   * array of <tt>RawPacket</tt> with the created packet as its first element (and <tt>null</tt> for
   * the other elements).
   *
   * <p>Allows extenders to intercept the packet data and possibly filter and/or modify it.
   *
   * @param datagramPacket the <tt>DatagramPacket</tt> containing the packet data
   * @return an array of <tt>RawPacket</tt> containing the <tt>RawPacket</tt> which contains the
   *     packet data of the specified <tt>DatagramPacket</tt> as its first element.
   */
  protected RawPacket[] createRawPacket(DatagramPacket datagramPacket) {
    RawPacket[] pkts = rawPacketArrayPool.poll();
    if (pkts == null) pkts = new RawPacket[1];

    RawPacket pkt = rawPacketPool.poll();
    if (pkt == null) pkt = new RawPacket();

    pkt.setBuffer(datagramPacket.getData());
    pkt.setFlags(0);
    pkt.setLength(datagramPacket.getLength());
    pkt.setOffset(datagramPacket.getOffset());

    pkts[0] = pkt;
    return pkts;
  }
Beispiel #6
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            @Override
            public RawPacket reverseTransform(RawPacket pkt) {
              RecorderRtpImpl.this.handleRtcpPacket(pkt);
              if (pkt != null && pkt.getRTCPPayloadType() == 203) {
                // An RTCP BYE packet. Remove the receive stream before
                // it gets to FMJ, because we want to, for example,
                // flush the packet buffer before that.

                long ssrc = pkt.getRTCPSSRC() & 0xffffffffl;
                if (logger.isInfoEnabled()) logger.info("RTCP BYE for SSRC=" + ssrc);

                ReceiveStreamDesc receiveStream = findReceiveStream(ssrc);
                if (receiveStream != null) removeReceiveStream(receiveStream, false);
              }

              return pkt;
            }
Beispiel #7
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      @Override
      public int read(byte[] buffer, int offset, int length) throws IOException {

        RawPacket pendingPacket;
        if (isControlStream) {
          pendingPacket = pendingControlPacket;
        } else {
          pendingPacket = pendingDataPacket;
        }
        int bytesToRead = 0;
        byte[] pendingPacketBuffer = pendingPacket.getBuffer();
        if (pendingPacketBuffer != null) {
          int pendingPacketLength = pendingPacket.getLength();
          bytesToRead = length > pendingPacketLength ? pendingPacketLength : length;
          System.arraycopy(
              pendingPacketBuffer, pendingPacket.getOffset(), buffer, offset, bytesToRead);
        }
        return bytesToRead;
      }
  /**
   * Copies the content of the most recently received packet into <tt>data</tt>.
   *
   * @param buffer an optional <tt>Buffer</tt> instance associated with the specified <tt>data</tt>,
   *     <tt>offset</tt> and <tt>length</tt> and provided to the method in case the implementation
   *     would like to provide additional <tt>Buffer</tt> properties such as <tt>flags</tt>
   * @param data the <tt>byte[]</tt> that we'd like to copy the content of the packet to.
   * @param offset the position where we are supposed to start writing in <tt>data</tt>.
   * @param length the number of <tt>byte</tt>s available for writing in <tt>data</tt>.
   * @return the number of bytes read
   * @throws IOException if <tt>length</tt> is less than the size of the packet.
   */
  protected int read(Buffer buffer, byte[] data, int offset, int length) throws IOException {
    if (data == null) throw new NullPointerException("data");

    if (ioError) return -1;

    RawPacket pkt;

    synchronized (pktSyncRoot) {
      pkt = this.pkt;
      this.pkt = null;
    }

    int pktLength;

    if (pkt == null) {
      pktLength = 0;
    } else {
      // By default, pkt will be returned to the pool after it was read.
      boolean poolPkt = true;

      try {
        pktLength = pkt.getLength();
        if (length < pktLength) {
          /*
           * If pkt is still the latest RawPacket made available to
           * reading, reinstate it for the next invocation of read;
           * otherwise, return it to the pool.
           */
          poolPkt = false;
          throw new IOException("Input buffer not big enough for " + pktLength);
        } else {
          byte[] pktBuffer = pkt.getBuffer();

          if (pktBuffer == null) {
            throw new NullPointerException(
                "pkt.buffer null, pkt.length " + pktLength + ", pkt.offset " + pkt.getOffset());
          } else {
            System.arraycopy(pkt.getBuffer(), pkt.getOffset(), data, offset, pktLength);
            if (buffer != null) buffer.setFlags(pkt.getFlags());
          }
        }
      } finally {
        if (!poolPkt) {
          synchronized (pktSyncRoot) {
            if (this.pkt == null) this.pkt = pkt;
            else poolPkt = true;
          }
        }
        if (poolPkt) {
          // Return pkt to the pool because it was successfully read.
          poolRawPacket(pkt);
        }
      }
    }

    return pktLength;
  }
  /**
   * Listens for incoming datagrams, stores them for reading by the <tt>read</tt> method and
   * notifies the local <tt>transferHandler</tt> that there's data to be read.
   */
  public void run() {
    DatagramPacket p = new DatagramPacket(buffer, 0, PACKET_RECEIVE_BUFFER_LENGTH);

    while (!closed) {
      try {
        // http://code.google.com/p/android/issues/detail?id=24765
        if (OSUtils.IS_ANDROID) p.setLength(PACKET_RECEIVE_BUFFER_LENGTH);

        receivePacket(p);
      } catch (IOException e) {
        ioError = true;
        break;
      }

      /*
       * Do the DatagramPacketFilters accept the received DatagramPacket?
       */
      DatagramPacketFilter[] datagramPacketFilters = getDatagramPacketFilters();
      boolean accept;

      if (!enabled) accept = false;
      else if (datagramPacketFilters == null) accept = true;
      else {
        accept = true;
        for (int i = 0; i < datagramPacketFilters.length; i++) {
          try {
            if (!datagramPacketFilters[i].accept(p)) {
              accept = false;
              break;
            }
          } catch (Throwable t) {
            if (t instanceof ThreadDeath) throw (ThreadDeath) t;
          }
        }
      }

      if (accept) {
        RawPacket pkts[] = createRawPacket(p);

        for (int i = 0; i < pkts.length; i++) {
          RawPacket pkt = pkts[i];

          pkts[i] = null;

          if (pkt != null) {
            if (pkt.isInvalid()) {
              /*
               * Return pkt to the pool because it is invalid and,
               * consequently, will not be made available to
               * reading.
               */
              poolRawPacket(pkt);
            } else {
              RawPacket oldPkt;

              synchronized (pktSyncRoot) {
                oldPkt = this.pkt;
                this.pkt = pkt;
              }
              if (oldPkt != null) {
                /*
                 * Return oldPkt to the pool because it was made
                 * available to reading and it was not read.
                 */
                poolRawPacket(oldPkt);
              }

              if (videoRecorder != null) videoRecorder.recordData(pkt);

              if ((transferHandler != null) && !closed) {
                try {
                  transferHandler.transferData(this);
                } catch (Throwable t) {
                  /*
                   * XXX We cannot allow transferHandler to
                   * kill us.
                   */
                  if (t instanceof ThreadDeath) {
                    throw (ThreadDeath) t;
                  } else {
                    logger.warn("An RTP packet may have not been" + " fully handled.", t);
                  }
                }
              }
            }
          }
        }
        rawPacketArrayPool.offer(pkts);
      }
    }
  }