[wdmaudiodev] Re: Removing audio device through the driver
- From: "Stephan" <stephan@xxxxxxxxxx>
- To: "Jeff Claar" <jclaar@xxxxxxxxxxxxxx>, <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 16 Apr 2003 16:22:40 +0200
Hi Jeff,
I'm pretty sure you need to put the two pins on two different filters. You
should create them dynamically using
KsCreateFilterFactory() and KsFilterFactorySetDeviceClassesState() because
AVStream won't parse a KSDEVICE_DESCRIPTOR
with more than one FilterDescriptor correctly.
Stephan
----- Original Message -----
From: "Jeff Claar" <jclaar@xxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Tuesday, April 15, 2003 11:03 PM
Subject: [wdmaudiodev] Removing audio device through the driver
>
> Hi all,
>
> I have a device that has 2 channels of input and 2 channels of output.
> Usually both of these outputs are available, but the user may configure the
> device so that only input or only output is available. In this case, I'd
> like either the recording or playback device to disappear from the Windows
> Sounds and Audio Devices property page.
>
> I have an avstream driver for the device, which has one filter that exposes
> two pins, one each for input and output. The device appears under the "Sound
> playback" and "Sound recording" drop-down list boxes in the sounds property
> page, even if only input (or output) is enabled.
>
> My initial thought was to disable either the rendering or capturing
> interface for the device, through IoSetDeviceInterfaceState, using the
> symbolic name for KSCATEGORY_RENDER or KSCATEGORY_CAPTURE. Unfortunately,
> this doesn't make any difference. However, if I disable the KSCATEGORY_AUDIO
> interface, both the playback and recording audio devices are removed from
> the property page.
>
> Is there a way I can disable either one or the other?
>
> Thanks,
> Jeff
>
>
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