[wdmaudiodev] Re: wdmaudiodev] Re: avstream audio driver and portcls audio driver?
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 13 Feb 2007 10:02:06 +1100
Hi Yong,
I haven't done very much with this, but hopefully this will help. You can
obtain a device interface for the wave or topology miniport by calling
waveInMessage, waveOutMessage or mixerMessage with the parameters
DRV_QUERYDEVICEINTERFACE and DRV_QUERYDEVICEINTERFACESIZE, which are documented
in the WDK. Using that device interface, you can then call DeviceIoControl with
IOCTL_KS_PROPERTY, IOCTL_KS_ENABLE_EVENT/IOCTL_KS_DISABLE_EVENT, and
IOCTL_KS_METHOD.
If your client software is using DirectSound, device property sets can be
accessed by calling QueryInterface with IID_IKsPropertySet on a DirectSound
buffer object. This is documented in the DirectX documentation.
If you're using the Core Audio API on Windows Vista, Mitch Rundle described a
method for activating an IKsControl interface on an audio endpoint on this list
on the 9th January 2007.
Jeff
----- Original Message -----
From: Yong Liu
To: wdmaudiodev
Sent: Tuesday, February 13, 2007 1:21 AM
Subject: [wdmaudiodev] wdmaudiodev] Re: avstream audio driver and portcls
audio driver?
Thank you very much for your information. Another question is that in
AVstream, clients (user mode) can call IKsControl::ksmethod(ksevent,
ksproperty) to communicate (read or write data) with the kernel mode driver,
can portcls do that and how? This may be a silly question, but you answer will
save me much time. Thank you. Yong
Other related posts:
