[wdmaudiodev] Re: Virtual Audio Device + Device Not Found Error
- From: Tim Roberts <timr@xxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 7 Apr 2011 09:45:02 -0700
Dale Hill wrote:
>
> All,
>
>
>
> I'm developing a Virtual audio filter based on avstream to perform
> rendering and capturing.
>
> Using GraphEdit, I am able to insert my filter and connect the capture
> output of avssamp to the render input of my filter. But, when I try to
> start the graph I get the following error message:
>
> "This graph cannot play. The device is not connected (Return Code:
> 0x8007048F)". This message appears immediately before SetState or
> Process gets called. Below is the descriptor describing the filter.
> Any ideas would be greatly appreciated.
>
This is probably not a descriptor issue. This is a code issue. Are you
dumping the return values from every callback you have?
However, I'm wondering why you have so many pin flags specified. A
virtual device should not need KSPIN_FLAG_GENERATE_MAPPINGS or
KSPIN_FLAG_DISPATCH_LEVEL_PROCESSING or
KSPIN_FLAG_FRAME_NOT_REQURED_FOR_PROCESSING.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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