[wdmaudiodev] Re: problem with multiple subdevices and topology: help please
- From: "Philip Lukidis" <pagefault0x0@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 2 Jul 2003 16:03:39 -0400
I should have added the following:
The wav adapter is enumerated by my bus driver. A possible solution would
be for my bus driver to enumerate three wav adapters, each of which would
register its particular wave subdevice/topology pair, but I'd like to know
if there is another solution. Thanks.
Philip Lukidis
----- Original Message -----
From: "Philip Lukidis" <pagefault0x0@xxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Wednesday, July 02, 2003 1:47 PM
Subject: [wdmaudiodev] problem with multiple subdevices and topology: help
please
> Hi all.
>
> I have an audio driver (port driver is portcls.sys), with 3 wave
subdevices.
> I want the user to be able to use sndvol32 to regulate the wave, CD and
> SYNTH playback volumes for each wave subdevice. So the topology miniport
> has to reflect this, and be properly connected to the wave subdevices.
>
> With WinXP, I have found at least 2 successful ways of doing this:
>
> a) I create 3 topology miniports, and connect them to their corresponding
> wave miniports via PcRegisterPhysicalConnection. The topology miniports
are
> the same, and quite simple; in fact for now they
> just have a wave volume and mute nodes declared. There are two pins to
each
> topology miniport, with the
> first pin connected to the output of its WAVE subdevice (its category is
> KSCATEGORY_AUDIO), and the second
> serving as the output (its category is KSNODETYPE_SPEAKER). This method
> also works with Win2k.
>
> b) I create 1 topology miniport, with 3 input pins. Each input pin is
> connected to its corresponding WAVE
> subdevice via PcRegisterPhysicalConnection. All these pins feed into a
sum
> node, which then feeds into the
> wave volume and then the wave mute. Finally, the wave mute is connected
to
> the output pin, which is of
> category KSNODETYPE_SPEAKER.
>
> Both these methods work fine under WinXP (method a is confirmed to work
with
> Win2k), except in the second
> method I have an extra volume displayed, probably due to my sum node. I
can
> regulate the volumes for each
> wave subdevice as expected.
>
> However, under Win98SE/ME, these methods do not work at all. While the
> volumes for the first wave subdevice
> are displayed OK in sndvol32, using them has no effect. Worse, there are
no
> other subevices in the playback
> menu of sndvol32; the volumes for the last 2 subdevices cannot be
displayed
> at all. NewStream is not even
> called when I try and use the MS supplied synth and my wave subdevice.
>
> When I tried a variant of method a), I had some success in 98SE/ME. The
> variation was to create and connect
> only 1 subdevice-topology pair at once. Creating and connecting more than
1
> pair results in the same
> symptoms as I've described above. It therefore seems to me that my
property
> handlers are functioning OK.
>
> Could anyone give me some clue about what I am doing incorrectly? In the
> past I have always had to deal with
> 1 wave subdevice, which never have me any problems with the topology.
> Thanks.
>
> Philip Lukidis
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