[wdmaudiodev] Re: Associating a waveIn/waveOut device with an IMMDevice

  • From: Mike Preston <mike@xxxxxxxxxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Wed, 21 Feb 2007 12:26:32 -0800

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 | |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| | 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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--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|            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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