void MultiFramedRTPSink::packFrame() {
  // Get the next frame.

  // First, see if we have an overflow frame that was too big for the last pkt
  if (fOutBuf->haveOverflowData()) {
    // Use this frame before reading a new one from the source
    unsigned frameSize = fOutBuf->overflowDataSize();
    struct timeval presentationTime = fOutBuf->overflowPresentationTime();
    unsigned durationInMicroseconds = fOutBuf->overflowDurationInMicroseconds();
    fOutBuf->useOverflowData();

    afterGettingFrame1(frameSize, 0, presentationTime, durationInMicroseconds);
  } else {
    // Normal case: we need to read a new frame from the source
    if (fSource == NULL) return;

    fCurFrameSpecificHeaderPosition = fOutBuf->curPacketSize();
    fCurFrameSpecificHeaderSize = frameSpecificHeaderSize();
    fOutBuf->skipBytes(fCurFrameSpecificHeaderSize);
    fTotalFrameSpecificHeaderSizes += fCurFrameSpecificHeaderSize;

    fSource->getNextFrame(fOutBuf->curPtr(), fOutBuf->totalBytesAvailable(),
			  afterGettingFrame, this, ourHandleClosure, this);
  }
}
Boolean MultiFramedRTPSink::isTooBigForAPacket(unsigned numBytes) const {
  // Check whether a 'numBytes'-byte frame - together with a RTP header and
  // (possible) special headers - would be too big for an output packet:
  // (Later allow for RTP extension header!) #####
  numBytes += rtpHeaderSize + specialHeaderSize() + frameSpecificHeaderSize();
  return fOutBuf->isTooBigForAPacket(numBytes);
}
void MultiFramedRTPSink::sendPacketIfNecessary() {
  if (fNumFramesUsedSoFar > 0) {
    // Send the packet:
#ifdef TEST_LOSS
    if ((our_random()%10) != 0) // simulate 10% packet loss #####
#endif
      if (!fRTPInterface.sendPacket(fOutBuf->packet(), fOutBuf->curPacketSize())) {
	// if failure handler has been specified, call it
	if (fOnSendErrorFunc != NULL) (*fOnSendErrorFunc)(fOnSendErrorData);
      }
    ++fPacketCount;
    fTotalOctetCount += fOutBuf->curPacketSize();
    fOctetCount += fOutBuf->curPacketSize()
      - rtpHeaderSize - fSpecialHeaderSize - fTotalFrameSpecificHeaderSizes;

    ++fSeqNo; // for next time
  }

  if (fOutBuf->haveOverflowData()
      && fOutBuf->totalBytesAvailable() > fOutBuf->totalBufferSize()/2) {
    // Efficiency hack: Reset the packet start pointer to just in front of
    // the overflow data (allowing for the RTP header and special headers),
    // so that we probably don't have to "memmove()" the overflow data
    // into place when building the next packet:
    unsigned newPacketStart = fOutBuf->curPacketSize()
      - (rtpHeaderSize + fSpecialHeaderSize + frameSpecificHeaderSize());
    fOutBuf->adjustPacketStart(newPacketStart);
  } else {
    // Normal case: Reset the packet start pointer back to the start:
    fOutBuf->resetPacketStart();
  }
  fOutBuf->resetOffset();
  fNumFramesUsedSoFar = 0;

  if (fNoFramesLeft) {
    // We're done:
    onSourceClosure();
  } else {
    // We have more frames left to send.  Figure out when the next frame
    // is due to start playing, then make sure that we wait this long before
    // sending the next packet.
    struct timeval timeNow;
    gettimeofday(&timeNow, NULL);
    int secsDiff = fNextSendTime.tv_sec - timeNow.tv_sec;
    int64_t uSecondsToGo = secsDiff*1000000 + (fNextSendTime.tv_usec - timeNow.tv_usec);
    if (uSecondsToGo < 0 || secsDiff < 0) { // sanity check: Make sure that the time-to-delay is non-negative:
      uSecondsToGo = 0;
    }

    // Delay this amount of time:
    nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecondsToGo, (TaskFunc*)sendNext, this);
  }
}
Ejemplo n.º 4
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void MultiFramedRTPSink::sendPacketIfNecessary() {
  if (fNumFramesUsedSoFar > 0) {
    // Send the packet:
#ifdef TEST_LOSS
    if ((our_random()%10) != 0) // simulate 10% packet loss #####
#endif
	if(fSeqNo < 10)
	{
		Debug(ckite_log_message, "fSeqNo = %d\n", fSeqNo);
	}
    int sndIsSucess = fRTPInterface.sendPacket(fOutBuf->packet(), fOutBuf->curPacketSize());
	Debug(ckite_log_message, "sndIsSucess = %d, fOwner = %x\n", sndIsSucess, fOwner);
	if (fOwner != NULL && sndIsSucess == 1)
	{
		Debug(ckite_log_message, "sendPacketIfNecessary.\n");
		((RTSPServer::RTSPClientSession*)fOwner)->noteLiveness();
	}
	if(fOwner != NULL && sndIsSucess == -1)
	{
		((RTSPServer::RTSPClientSession*)fOwner)->closeHttpSocketAndFreeResource();
	}
	//Debug(ckite_log_message, "[wayde]MultiFramedRTPSink::sendPacketIfNecessary packetSize = %d\n",fOutBuf->curPacketSize());
    ++fPacketCount;
    fTotalOctetCount += fOutBuf->curPacketSize();
    fOctetCount += fOutBuf->curPacketSize()
      - rtpHeaderSize - fSpecialHeaderSize - fTotalFrameSpecificHeaderSizes;

    ++fSeqNo; // for next time
  }

  if (fOutBuf->haveOverflowData()
      && fOutBuf->totalBytesAvailable() > fOutBuf->totalBufferSize()/2) {
    // Efficiency hack: Reset the packet start pointer to just in front of
    // the overflow data (allowing for the RTP header and special headers),
    // so that we probably don't have to "memmove()" the overflow data
    // into place when building the next packet:
    unsigned newPacketStart = fOutBuf->curPacketSize()
      - (rtpHeaderSize + fSpecialHeaderSize + frameSpecificHeaderSize());
    fOutBuf->adjustPacketStart(newPacketStart);
  } else {
    // Normal case: Reset the packet start pointer back to the start:
    fOutBuf->resetPacketStart();
  }
  fOutBuf->resetOffset();
  fNumFramesUsedSoFar = 0;

  if (fNoFramesLeft) {
    // We're done:
    onSourceClosure(this);
  } else {
    // We have more frames left to send.  Figure out when the next frame
    // is due to start playing, then make sure that we wait this long before
    // sending the next packet.
    struct timeval timeNow;
    gettimeofday(&timeNow, NULL);
    int uSecondsToGo;
    if (fNextSendTime.tv_sec < timeNow.tv_sec
	|| (fNextSendTime.tv_sec == timeNow.tv_sec && fNextSendTime.tv_usec < timeNow.tv_usec)) {
      uSecondsToGo = 0; // prevents integer underflow if too far behind
    } else {
      uSecondsToGo = (fNextSendTime.tv_sec - timeNow.tv_sec)*1000000 + (fNextSendTime.tv_usec - timeNow.tv_usec);
    }

    // Delay this amount of time:
    nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecondsToGo,
						(TaskFunc*)sendNext, this);
  }
}