这个connectdirect（）调用有问题吗？

问题描述

在DirectShow的C ++实现中，我在Graph Manager中添加了两个图形（为简单起见，删除了响应检查）。当我尝试使用ConnectDirect连接它们时，我得到一个E_POINTER无效指针。我做错了什么？

In a C++ Implementation of DirectShow, I have added two graphs the the Graph Manager (response checks removed for simplicity). When I try to connect them using ConnectDirect and I get a "E_POINTER Invalid Pointer as a result". What am I doing wrong?

	CComPtr<IBaseFilter> peconsCX3RDKwithOV5640;
	hr = peconsCX3RDKwithOV5640.CoCreateInstance(CLSID_econsCX3RDKwithOV5640);
	hr = pGraph->AddFilter(peconsCX3RDKwithOV5640, L"e-con's CX3 RDK with OV5640");

	CComPtr<IBaseFilter> pAVIDecompressor;
	hr = pAVIDecompressor.CoCreateInstance(CLSID_AVIDec);
	hr = pGraph->AddFilter(pAVIDecompressor, L"AVI Decompressor");

// ConnectDirect give an Invalid pointer response
	hr = pGraph->ConnectDirect(GetPin(peconsCX3RDKwithOV5640, L"Capture"), GetPin(pAVIDecompressor, L"XForm In"), NULL);

我的尝试：



我使用GraphEdit作为模型，它可以正常工作。我验证了名称引脚是正确的，并尝试在XForm和In（XForm_In）之间放置一个下划线（_）。我检查并重新检查了语法，但看不到我的错误。

What I have tried:

I used GraphEdit for the model,and it works correctly. I verified the designations pin are correct and tried putting an underscore (_) between XForm and In (XForm_In). I have checked and re-checked the syntax and cannot see my mistake.

推荐答案

hr = pGraph->AddFilter(peconsCX3RDKwithOV5640,"e-con's CX3 RDK with OV5640");

并拆分ConnectDirect调用以检查GetPin调用第一。也许它们是你问题的根源。



分开代码并检查所有结果。

And split the ConnectDirect call to check the GetPin calls at first. Maybe they are the source of your problem.

Separate the code and check all results.

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