[wdmaudiodev] Re: Associating a waveIn/waveOut device with an IMMDevice
- From: Frank Yerrace <Frank.Yerrace@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 21 Feb 2007 12:59:08 -0800
Audio inputs and outputs driven by WDM audio drivers will appear as endpoints
in MM Device API and the DRV_QUERYFUNCTIONINSTANCEID message should work.
Frank Yerrace
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Preston
Sent: Wednesday, February 21, 2007 12:27 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Associating a waveIn/waveOut device with an IMMDevice
Does that include WDM audio drivers?
Mike
Larry Osterman wrote:
> NT4 style audio drivers - in that case you have a wave device that is
> not associated with an audio endpoint.
>
>
> -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Preston
> Sent: Wednesday, February 21, 2007 10:09 AM To:
> wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: Associating a
> waveIn/waveOut device with an IMMDevice
>
> Thanks, Larry. I'll give it a try. So is there something specific
> about what might make it fail? I know that "unavailable" endpoints
> don't show up in the waveOut/waveIn enumeration. Does it have
> something to do with the endpoint's state?
>
> Thanks, Mike
>
> Larry Osterman wrote:
>> It's not pretty :(.
>>
>> Essentially you need to send the DRV_QUERYFUNCTIONINSTANCEID and
>> DRV_QUERYFUNCTIONINSTANCEIDSIZE to waveOutMessage on each wave
>> device. That will return the endpoint name that each wave device
>> is associated with. You can call IMMDeviceEnumerator::GetDevice to
>> retrieve an IMMDevice for that endpoint.
>>
>> Note that the DRV_QUERYFUNCTIONINSTANCEID API WILL fail in some
>> cases, so don't assume it works.
>>
>>
>> -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx
>> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Mike Preston
>> Sent: Wednesday, February 21, 2007 9:21 AM To:
>> wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Associating a
>> waveIn/waveOut device with an IMMDevice
>>
>> I saw some chatter about this on the list a while back, but it
>> seemed to center around access a custom interface. Does anyone
>> have any info on associating a waveOut/waveIn device with an
>> IMMDevice in general? I can enumerate through the list of MM
>> Devices using the Core Audio APIs, which show all the
>> Render/Capture endpoints, and I can enumerate through all the
>> waveOut/waveIn devices, which only show the devices that are
>> available, and which always put the default device first. How can
>> I take an IMMDevice and determine what index to use with the
>> waveOut/waveIn functions to access the same endpoint?
>>
>>
>> Thanks, Mike --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
>> Mike Preston | Home/Office: (360)756-1655 | | E-mail:
>> mike@xxxxxxxxxxxxxxxxxxx | Cell: (360)303-9331 |
>> |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| |
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>>
>
> -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> | Mike Preston | Home/Office: (360)756-1655 | |
> E-mail: mike@xxxxxxxxxxxxxxxxxxx | Cell: (360)303-9331 |
> |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| |
> The man who follows the crowd will usually get no | |
> further than the crowd. The man who walks alone is | |
> likely to find himself in places no one has ever been. | |
> -- Alan Ashley-Pitt |
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ******************
>
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--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Mike Preston | Home/Office: (360)756-1655 |
| E-mail: mike@xxxxxxxxxxxxxxxxxxx | Cell: (360)303-9331 |
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
| The man who follows the crowd will usually get no |
| further than the crowd. The man who walks alone is |
| likely to find himself in places no one has ever been. |
| -- Alan Ashley-Pitt |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
******************
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