[wdmaudiodev] Re: WaveRT weird problem
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 26 Oct 2011 20:24:00 +0000
We've had trouble in the past with drivers claiming support for _NOTIFICATION
but not implementing it correctly. The endpoint property was created to allow
drivers to doubly advertise support; if a driver claims support for
_NOTIFICATION but doesn't have the property key set, that's worth raising an
eyebrow over. Windows 7 will revert to the non-_NOTIFICATION path.
Another possibility is that there's simply an alignment error. When you use
the HD Audio driver, are you asking for the same size buffer? Running
http://blogs.msdn.com/b/matthew_van_eerde/archive/2009/04/03/sample-wasapi-exclusive-mode-event-driven-playback-app-including-the-hd-audio-alignment-dance.aspx
should help diagnose whether this is the issue.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Bielik
Sent: Wednesday, October 26, 2011 12:37 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: WaveRT weird problem
Hello Matthew,
Matthew van Eerde skrev 2011-10-26 17:44:
> If you dump the endpoint properties for this device (with the Conexant
> driver) do you see a PKEY_AudioEndpoint_Supports_EventDriven_Mode property
> with value 1?
I don't know, and I'm not sure I'll be able to test again with the PC (it's
"flying away" tomorrow), but as I said,
KSPROPERTY_RTAUDIO_QUERY_NOTIFICATION_SUPPORT returns TRUE, which I guess is
the "horses mouth" with regard to the
PKEY_AudioEndpoint_Supports_EventDriven_Mode property (?)
I mean, I'm down in the WDM/KS dumps, so WASAPI Endpoint properties don't
really concern me. But it is a fact that Windows 7 somehow does "make it" to
the device buffer, which I don't. The docs say "Events are registered using
KSPROPERTY_RTAUDIO_REGISTER_NOTIFICATION_EVENT _after_ successfully calling
KSPROPERTY_RTAUDIO_BUFFER_WITH_NOTIFICATION" and that never happens, which it
acc. to KSPROPERTY_RTAUDIO_QUERY_NOTIFICATION_SUPPORT should (!)
Regards,
/Rob
>
> http://blogs.msdn.com/b/matthew_van_eerde/archive/2011/06/13/how-to-en
> umerate-audio-endpoint-immdevice-properties-on-your-system.aspx
>
>
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Bielik
> Sent: Wednesday, October 26, 2011 7:30 AM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] Re: WaveRT weird problem
>
> Robert Bielik skrev 2011-10-26 15:38:
>> and I get FALSE result and GetLastError() returns
>> ERROR_INVALID_PARAMETER. This code works fine on _several_ other
>> machines, also on Windows 7 machines, and the device works fine
>> otherwise in Windows 7, hence I must be doing something wrong (?)
>>
>
> Further to this, just for the heck of it, I uninstalled the Conexant
> device, and during the driver installation procedure, I skipped
> Windows update so that the Microsoft HDAudio.sys was chosen instead, and then
> the code works fine. A workaround, but not good, since the Conexant driver
> does work in Windows 7, so I'd like to be able to make portaudio work with it
> too...
>
> Regards,
> /Rob
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