[wdmaudiodev] Re: Vista: multichannel playback
- From: "Philip Lukidis" <plukidis@xxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 16 Jan 2007 10:26:59 -0500
Hi,
Going by memory, I think he mentioned the property
KSPROPERTY_PIN_PROPOSEDATAFORMAT and not KSPROPERTY_PIN_DATAINTERSECTION (which
I guess maps to your DataRangeIntersection method). My handler for
KSPROPERTY_PIN_PROPOSEDATAFORMAT is definitely called under Vista, and in that
case my DataRangeIntersection method is not called at all (except by KSStudio).
For KSNODETYPE_LINE_CONNECTOR, the handler supporting
KSPROPERTY_PIN_PROPOSEDATAFORMAT should make sure that the dwChannelMask is
indeed 0, else refuse it. For the DatarangeIntersection approach, see the
PCMEX example (MSVAD) in the WDK. There you can see how a channel mask is
being set. So, in your case, simply set it to 0.
hth,
Philip Lukidis
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]On Behalf Of Eugene
> Muzychenko
> Sent: Tuesday, January 16, 2007 6:50 AM
> To: Mitchell Rundle
> Subject: [wdmaudiodev] Re: Vista: multichannel playback
>
>
> Hello Mitchell,
>
> > To make multichannel work with Line Out, just make your handlers
> > for _DATAINTERSECTION and _PROPOSEDATAFORMAT (if you have one)
> > accept formats with WAVEFORMATEXTENSIBLE:: dwChannelMask = 0.
>
> I have the same problem: I specify KSNODETYPE_LINE_CONNECTOR for the
> output pin category, and Vista offers only two-channel formats. I
> implemented KSPROPERTY_PIN_DATAINTERSECTION handler as you suggested
> by the handler is not be called by PortCls. Instead, PortCls calls
> DataRangeIntersection method of my Wave miniport interface but there
> is no channel mask information in such request.
>
> Does it mean that I must intercept IOCTL_KS_PROPERTY request
> in my filter Dispatch
> routine and process it myself, not passing it to PortCls?
>
> Regards,
> Eugene
>
> ******************
>
> WDMAUDIODEV addresses:
> Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
> Subscribe:
> mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
> Unsubscribe:
> mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
> Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
>
> URL to WDMAUDIODEV page:
> http://www.wdmaudiodev.com/
>
>
******************
WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
URL to WDMAUDIODEV page:
http://www.wdmaudiodev.com/
Other related posts:
