[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 13:16:46 +1100
Further on this, I have run my driver on the Windows 2000 checked build with
WinDbg connected, and whenever an application tries to enumerate the mixer
controls the debugger says:
KMXL: Invalid topology persisted or key not found. Rebuilding.
Is there any way I can determine what it is about my topology that Windows
2000 thinks is invalid?
Jeff
----- Original Message -----
From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Monday, March 08, 2004 10:53 AM
Subject: [wdmaudiodev] Re: Mixer problem with capture-only wave device on
Windows 2000
> 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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