[wdmaudiodev] Re: Mixer problem with capture-only wave device on Windows 2000
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 8 Mar 2004 10:53:23 +1100
Thanks for your suggestion. I have run KSStudio and all of my controls are
visible and appear to be okay. The "Check Topology" option doesn't report
any errors. Yet my controls are still not being seen by the mixer API or
SndVol32.
Is there any way to see what is happening in the Kernel Streaming Topology
to Audio Mixer API Translation process?
Jeff
----- Original Message -----
From: "Shyam Narayanan" <shyam@xxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Saturday, March 06, 2004 3:31 AM
Subject: [wdmaudiodev] Re: Mixer problem with capture-only wave device on
Windows 2000
> The KSStudio help has usage examples #2 and #3 which discuss this. May
> be that helps.
>
> Shyam V. Narayanan
>
>
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jeff Pages
> Sent: Thursday, March 04, 2004 11:48 PM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] Mixer problem with capture-only wave device on
> Windows 2000
>
> I have a capture-only device for which I have developed a WavePci
> driver,
> and everything is fine under Windows XP. However, there is a problem
> with
> the mixer side of it under Windows 2000.
>
> The mixer API sees the device and it reports the correct number of
> source
> and destination lines (1 of each) but it doesn't find the volume and
> mute
> controls on the destination line. Sndvol32 also sees my device but
> doesn't
> find any controls either.
>
> If I put in a dummy playback subdevice in the driver then Windows 2000
> becomes happy and finds all of my capture controls (as well as my dummy
> playback controls), however I would prefer not to have to do that since
> when
> the device is first installed Windows will try to make its dummy output
> the
> default playback device.
>
> This is the dump of my topology returned in
> IMiniportTopology::GetDescription - I can't see anything obviously wrong
> here...
>
> PINS
> 0 PIN_LINEIN_SOURCE
> 1 PIN_WAVEIN_DEST
> NODES
> 0 WAVEIN_SUM
> 1 VOLUME
> 2 MUTE
> CONNECTIONS
> 0 (-1,0)->(0,1)
> 1 (0,0)->(1,1)
> 2 (1,0)->(2,1)
> 3 (2,0)->(-1,1)
>
> Any thoughts anyone?
>
> Jeff Pages
> Innes Corporation Pty Ltd
>
>
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