[wdmaudiodev] Re: AVStream based Capture Filter
- From: Andy Cao <cao.andy@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 3 Mar 2009 10:37:13 +0800
Hi, Tim
Thanks for your reply.
There IS only one Capture pin. The audio data comes from a BDA device.
In my old version, audio/video data different sperate output pin in the same
filter. But some third-party software use "Audio Captrue Sources" DShow
category to capture audio data. So I have to use a different filter to
register the category.
In GraphEdit, my AudioOuputPin can render and its SetState(KSSTATE_RUN)
is invoked.
2009/3/3 Tim Roberts <timr@xxxxxxxxx>
> Andy Cao wrote:
> > hi
> > I wrote an AVStream driver and registered it to "Audio Capture
> > Sources" category. But the registered filter display different in
> > KSStdio/GraphEdit from that I declare in my code. And my filter play
> > in GraphEdit, GraphEdit is hung.
> >
> > my filter's pin description is here
> > ...
> > The KSStudio show only one Capture pin, and tell that the capture
> pin
> > is KSPIN_COMMUNICATION_SINK (not KSPIN_COMMUNICATION_BOTH as I
> > declare).
> >
>
> Well, there IS only one capture pin, right? You have one fake input pin
> for the analog audio, which is optional (InstancesNecessary==0) and has
> no valid data ranges, and one real capture output pin, which is required.
>
> How far do you get in graphedt? Does the pin connect? Do any of the
> state changes happen?
>
> --
> Tim Roberts, timr@xxxxxxxxx
> Providenza & Boekelheide, Inc.
>
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