Comments on: How To: Implement DirectShow Filter using DirectX Media Object DMO (Part 1: Starting the Project)

By: alax

alax — Wed, 05 Aug 2009 18:22:01 +0000

Thanks for this sample code DMO brightnesscontrast sample, I have one question. What are the places to change the UUID/GUIDs involved?

Basically you need to change all UUIDs there. LIBID, CLSID, IID – just all of them, use CreateGUID utility to create new identifiers.

Are they contained in one single file or spread across various files?

1 in dllmain.h, 2*2 in *.rgs, and all in DmoBrightnessContrastSample.idl but some of the mentioned are equal and new ones should also be equal in those places

By: jackbowman

jackbowman — Sun, 14 Sep 2008 05:07:00 +0000

During the development process I upgraded from VS2005 to VS2008. I had previously commented out the
2008-specific code per your chat recommendation and uncommented the DECLARE_REGISTRY_RESOURCEID line. The DLL registered but there was no DirectShow MediaObject registry entry for my DLL. Since I had upgraded, I was able to revert the code back to use your UpdateRegistry() routine. The DLL now registers as a DirectShow MediaObject, and GraphEdt was able to find it.

I have signed a Non-Disclosure agreement regarding the codec development and cannot reveal anything of the actual code.

Thanks for your help.

By: alax

alax — Sat, 13 Sep 2008 05:30:00 +0000

Jack,

I don’t think that registration in VS2005 is different from 2002, 2003 and 2008 versions where I have been using DECLARE_REGISTRY_RESOURCEID replacement. I would rather think it may be different for other reason such as a different project settings. Would you please mention, do you use attributed or non-attributed ATL, static or dynamic ATL linking. Basically if you send me the project, I can take a look and see what needs to be changed.

By: jackbowman

jackbowman — Sat, 13 Sep 2008 04:46:25 +0000

Regarding the DirectShow filter routine: Using VS2005, the routine UpdateRegistryFromResource() is not available. Reverting to the standard method (DECLARE_REGISTRY_RESOURCEID) works to register the DLL, but it does not get registered as a DirectShow MediaObject (does not show up in GraphEdt), as seems to happen when using the sample UpdateRegistry routine. Can anyone tell me how to make the DirectShow MediaObject auto-registration work with VS2005?

Thanks for any help.