实时源过滤器 [英] live source filter

问题描述

亲爱的，

我对推送源过滤器有疑问。如果源过滤器正在接收来自

I have a question about push source filter. If the source filter is recieveing live stream from

网络的实时流，那么每次收到数据包时都会调用FillBuffer方法吗？

network, is the FillBuffer method called every time when it recieves a packet?

我想编写一个实时源过滤器，但只设法改变球示例中的代码。

I want to write a live souce filter, but only managed to change the code from the ball example.

所以它是推送源过滤器，但不是实时源过滤器，是不是？如何撰写实时来源

So it is a push source filter, but not a live source filter, is it right? How do I write a live source

过滤器？

另一个问题是：我实际上是用过这个推送源过滤器从网络接收数据，

Another question is: I actually used this push source filter to recieve data from network,

并使用FillBuffer将数据转换为下游。我没有做任何时间戳，

and used FillBuffer to transform data to the downstream. I don't do any time stamp, is

这个对吗？我的程序运行得很好，有时很乱。它是关于FillBuffer

this right? My program runs sometimes well, sometimes messy. Is it about the FillBuffer

方法每次收到数据包时都不会被触发吗？

method not triggered every time it recieving a packet?

谢谢提前，

Alex

推荐答案

HRESULT JrtpStream::FillBuffer(IMediaSample *pms){	session.BeginDataAccess();		 //check incoming packets	if (session.GotoFirstSourceWithData())	{		RTPPacket *pack;		pack = session.GetNextPacket();		unsigned char* payloaddat = pack->GetPayloadData();		size_t payloadlen = pack->GetPayloadLength();		BYTE *pdat;		pms->GetPointer(&pdat);		memcpy(pdat, (BYTE *)payloaddat, payloadlen);		//pms->SetActualDataLength(payloadlen);		session.DeletePacket(pack);			}		session.EndDataAccess();	//REFERENCE_TIME rtStart = m_iFrameNumber * m_rtFrameLength; //   REFERENCE_TIME rtStop  = rtStart + m_rtFrameLength; //   pms->SetTime(&rtStart, &rtStop); //   m_iFrameNumber++; //   // Set TRUE on every sample for uncompressed frames //   pms->SetSyncPoint(true);	return S_OK;}

我附上了我的代码。 我很困惑，因为在此功能中，FillBuffer将在特定于过滤器的时间内被调用

I attached my code.  I am very confused because in this function FillBuffer will be called

，因此只有那些准时到达的数据才会被接收和处理

in a filter-specific time, so only those data arriving on time will be recieved and processed

（如果我理解正确的话）。我认为这就是图像混乱的原因。可以

(if I understand this correctly). I think this is the reason that the images are messy. Can

有人指出了一种正确的做法吗？

anyone point out a way that do it rightly?

提前感谢 

thanks in advance 

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