[Live-devel] 答复: 答复: empty payload data will be sent in MultiFramedRTPSink

[Zhang Qian（张倩）]

Hi Ross,

Yes, EventTrigger can fix this issue. 
Refer to DeviceSource.cpp in live555 source code. I call "doGetNextFrame"(will copy buffer to fTo and call FramedSource::afterGetting) in event trigger func "deliverFrame" when frame is available. It can work.  Thank you. :)

void DeviceSource::deliverFrame0(void* clientData) {
  ((DeviceSource*)clientData)->doGetNextFrame();
}

Thanks.
/Qian


-----邮件原件-----
发件人: live-devel [mailto:live-devel-bounces at us.live555.com] 代表 Ross Finlayson
发送时间: 2019年9月24日 12:27
收件人: LIVE555 Streaming Media - development & use
主题: Re: [Live-devel] 答复: empty payload data will be sent in MultiFramedRTPSink



> On Sep 23, 2019, at 9:15 PM, Zhang Qian（张倩） <qianzhang at asrmicro.com> wrote:
> 
> Hi Ross,
> 
> Thanks for your reply. Do you mean I just call scheduleDelayedTask if (fFrameSize > 0) as below ?  Seems that it will block the live555 thread...
> 
>    if (fFrameSize > 0)
>    {
>        // Set the 'presentation time':
>        gettimeofday(&fPresentationTime, NULL);
>        fDurationInMicroseconds = (mCurrentTimeStampUs - mLastTimeStampUs);
>        nextTask() = envir().taskScheduler().scheduleDelayedTask(schedule_delayUs,
>                 (TaskFunc*)FramedSource::afterGetting, this);
>    }
>    return;

Yes, this should work.  Of course, in the case where “fFrameSize == 0”, you must arrange for this code to be called again later, when a (non-empty) frame becomes available.  In other words, you need to handle an ‘event’ when a new frame becomes available.  Remember that LIVE555-based applications are event-based, using an event loop.

If you haven’t already done so, please read
	http://live555.com/liveMedia/faq.html#other-kinds-of-event


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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