[wdmaudiodev] Re: speaker configuration and KSPROPERTY_PIN_PROPOSEDATAFORMAT
- From: Mitchell Rundle <mitchr@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 9 Nov 2006 08:03:27 -0800
Is there just one host pin (I/O pin) that serves both the speaker and the
headphone bridge pins?
Regards,
Mitch Rundle
Microsoft
________________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx [wdmaudiodev-bounce@xxxxxxxxxxxxx] On
Behalf Of Philip Lukidis [plukidis@xxxxxxxxxxxxx]
Sent: Wednesday, November 08, 2006 3:45 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: speaker configuration and
KSPROPERTY_PIN_PROPOSEDATAFORMAT
Replying to myself to add some information:
For my speakers endpoint, I do receive a KSPROPERTY_AUDIO_CHANNEL_CONFIG call,
which is want I want to use to replace our older proprietary speaking
configuration. However, since I cannot select the "configure" button for my
headphones endpoint, I never receive a KSPROPERTY_AUDIO_CHANNEL_CONFIG call.
It is imperative that I receive this in order that I know which endpoint has
been selected by the user (headphones in this case).
Has anyone managed to receive a KSPROPERTY_AUDIO_CHANNEL_CONFIG call for a
headphones (KSNODETYPE_HEADPHONES) endpoint?
thanks for any help,
Philip Lukidis
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]On Behalf Of Philip Lukidis
> Sent: Wednesday, November 08, 2006 3:20 PM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] speaker configuration and
> KSPROPERTY_PIN_PROPOSEDATAFORMAT
>
>
> Hello. Concerning our WDM audio device, which supports
> multichannel and headphones, I am trying to move away from
> our proprietary speaker configuration and work with the new
> Vista settings. Towards that endeavour, I now support
> KSPROPERTY_PIN_PROPOSEDATAFORMAT on the filter (supporting it
> in the pins does not work at all for some reason, why?).
> This is so that we succeed whatever formats we support, and
> the Vista settings list our speaker configurations for the
> user to select.
>
> Setting the speaker configuration (except headphones, which
> is a different endpoint) seems to work fine- when the user
> selects the speaker configuration, we receive a
> KSPROPERTY_PIN_PROPOSEDATAFORMAT request with user selected
> configuration. However, I have the following questions:
> a) I am not able to get the pin except by checking the IRP in
> a try except handler, and extracting the KS_PIN structure.
> Is there a better way?
> b) How do I get notified if the user selects headphones? So
> far I never get called if I select the headphones endpoint.
> c) (somewhat OT) When I start playback, I get a call to my
> KSPROPERTY_PIN_PROPOSEDATAFORMAT handler, but the
> WAVE_FORMAT_EX structure seems a bit corrupt- the subformat
> is not KSDATAFORMAT_SUBTYPE_PCM, but something else
> (00000055-0000-0010-8000-00aa00389b71). What does this represent?
>
> Am I approaching this problem the wrong way? Thanks for any help,
>
> Philip Lukidis
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