Tag: ATL

RegSetKeySecurity, CRegKey::SetKeySecurity and CSecurityDesc

Posted on June 22, 2009 by Roman

One thing is worth special mentioning in connection with previous post on DirectShow Filter Graph Spy on Microsoft Vista system: ATL’s CSecurityDesc class caused to waste some time. CRegKey Key; ATLENSURE_SUCCEEDED(HRESULT_FROM_WIN32(Key.Open(HKEY_CLASSES_ROOT, pszKeyName, READ_CONTROL | WRITE_OWNER))); CSecurityDesc AdministratorsOwnerSecurityDescriptor; AdministratorsOwnerSecurityDescriptor.SetOwner(Sids::Admins()); ATLENSURE_SUCCEEDED(HRESULT_FROM_WIN32(Key.SetKeySecurity(OWNER_SECURITY_INFORMATION, &AdministratorsOwnerSecurityDescriptor))); The code compiles fine, but on runtime it gives error 87 (ERROR_INVALID_PARAMETER, E_INVALIDARG) in the…

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DirectShow Filter Graph Spy on Vista

Posted on June 22, 2009June 24, 2009 by Roman

I have been receiving comments that Filter Graph Spy tool does not work with Microsoft Vista operating system. I never had a moment to check until recently, and this time I realized that it really does not work. I am definitely aware of dramatic changes introduced with this operating system, and in particular UAC feature,…

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Hint on how to easily find your filter graph on running object table (ROT)

Posted on June 11, 2009June 11, 2009 by Roman

With a lot of DirectShow Filter Graphs published on Running Object Table, especially those automatically published by Filter Graph Spy utility, it might be a bit tricky to locate your graph of interest in the list. Filter graphs are published with a textual moniker item name of predefined format, which is recognized by GraphEdit or…

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YV12, Extended Video Renderer Strides, Private DMO and more

Posted on April 1, 2009April 1, 2009 by Roman

Recently it was the time to sort out an issue with a video DMO, which outputs YV12 video and in the same time is capable of supporting extended video strides in order to efficiently make a direct connection to Video Mixing Renderer Filters. From past experience, I already knew that some bugs are definitely involved…

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MediaTools: Tone Source Filter to generate reference audio feed, dual Audio Source Filter and Virtual Audio Capture Device

Posted on February 28, 2009March 10, 2009 by Roman

In order to obtain a reference audio source and especially useful for debugging purposes, including: audio input device unrelated to physical device, to avoid conditions when device is already in use by someone else non-zero audio signal which is independent of certain speaker or broadcasting service, including one that makes capture, transmission or rendering issues…

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MediaTools: HTTP Stream File Renderer Filter and more

Posted on February 14, 2009February 14, 2009 by Roman

In order to better troubleshoot network cameras and other devices, I added a new DirectShow filter to write HTTP response headers and body into a single file, one file (actually a pairs of files, the second file contains UTF-8 formatted HTTP response headers) per HTTP response. While troubleshootting JPEG artefact issue with I used the…

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Developer Goodies: ListResources to create an XML file from binary resources

Posted on February 7, 2009February 7, 2009 by Roman

At some point you might need to start paying special care for resources. Why? Perhaps there might be a number of reasons, I had to when I was dealing with first OEM versions of software and then internationalization. The whole idea is to let development team keep on working on regular version of software, in…

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