[wdmaudiodev] AVStream minidriver Capture stream fails WASAPI Exclusive-mode Stream
- From: "Dale Hill" <daleh@xxxxxxxxxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 27 May 2014 10:13:38 -0600
All:
We are unable to access capture streams using a WASAPI application in
exclusive-mode.
We've developed a virtual audio driver based on the AVStream mini-driver
model. It's been around for awhile and at this point works pretty well.
Recently however we've been trying to access capture streams using a WASAPI
application in exclusive-mode (AUDCLNT_SHAREMODE_EXCLUSIVE). This seems to
work just fine on 32-bit Windows 7 but on 64-bit Windows 7,
IsFormatSupported fails with error AUDCLNT_E_UNSUPPORTED_FORMAT
(0x88890008).
A few things worth noting:
IsFormatSupported() works fine on 64-bit Windows 7 when ShareMode is set to
AUDCLNT_SHAREMODE_SHARED.
The driver only supports one format: 48KHz, 24bit, PCM.
We're working with 64-bit Windows 7, SP1.
I don't believe that the driver has anything to do with enable
exclusive-mode. Could someone please confirm that - one way or another?
Does anyone have any ideas or information on this?
Thanks in advance.
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