[wdmaudiodev] Re: Can I identifying my audio endpoint?

  • From: Frank Yerrace <Frank.Yerrace@xxxxxxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Tue, 17 Oct 2006 15:59:25 -0700

Does your device have its own audio driver? One alternative is to read 
PKEY_Endpoint_KsComponentId from the endpoint property store. This returns a 
KSCOMPONENTID structure. However, for this endpoint property to have useful 
information, the audio driver must support the KS property 
KSPROPERTY_GENERAL_COMPONENTID and fill it in with useful information.

Frank Yerrace
Microsoft Corporation

This posting is provided "AS IS" with no warranties, and confers no rights.

From: wdmaudiodev-bounce@xxxxxxxxxxxxx 
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Alexandra Schoepel (Ally)
Sent: Tuesday, October 17, 2006 3:27 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Can I identifying my audio endpoint?

Hi guys,

What is the most effective way to identify one's own audio endpoint when using 
the IMMDeviceEnumerator?  None of the published Audio Endpoint properties seem 
to be uniquely tied to the device.  The DirectSound GUID 
(PKEY_AudioEndpoint_GUID) seems to be a floating value assigned by the OS and 
in no way tied to any information in the inf file of the driver.  Additionally, 
help on the IMMDevice::GetId function states that the information it represents 
is opaque and should not be used to obtain information about the device.  Any 

Alexandra Schoepel

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