[wdmaudiodev] Re: AVStream based Capture Filter
- From: Andy Cao <cao.andy@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 3 Mar 2009 15:06:06 +0800
If GraphEdit select my audio filter in "WDM Streaming Capture Devices"
category, the filter looks the same as that I declare in code, and works
well (it can run/stop and play sound).
But in "Audio Capture Sources" category, it looks have only one pin, and the
GraphEdit hung after render and play.
2009/3/3 Andy Cao <cao.andy@xxxxxxxxx>
> 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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