[wdmaudiodev] Re: Peakmeters on Vista build 5472
- From: "Jeff Pages" <barefeet@xxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Sat, 19 Aug 2006 06:46:49 +1000
Thanks Mitch,
The card has two independent stereo channels, which appear as separate
endpoints. The speaker configuration is set to stereo. I'm also seeing the
same problem on capture as well as render.
Jeff
----- Original Message -----
From: "Mitchell Rundle" <mitchr@xxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Saturday, August 19, 2006 3:51 AM
Subject: [wdmaudiodev] Re: Peakmeters on Vista build 5472
Jeff, you might be seeing a bug that we recently fixed. How many
channels are supported on this device? What is the speaker config set
to? (goto mmsys.cpl -> select the device -> click "Configure").
If the speaker config is not stereo, set it to stereo and see if this
repros.
Thanks
Mitch Rundle
Microsoft Corp.
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jeff Pages
Sent: Thursday, August 17, 2006 6:13 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Peakmeters on Vista build 5472
Our sound cards provide hardware peak meters on playback and record.
Using the IDeviceTopology interface, I can find the meters and read them
successfully, but with the IAudioMeterInformation interface,
GetChannelsPeakValues returns E_INVALIDARG if I set u32ChannelCount to 2
(even though IAudioEndpointVolume::GetChannelCount returns 2). The only
way I can get GetChannelsPeakValues to return S_OK is to set
u32ChannelCount to 0, and of course if I do that I don't get any meter
readings returned.
I understand this interface will provide virtual meters if the hardware
doesn't have them, and that seems to work. Has anyone managed to get
IAudioMeterInformation to work on a device that has hardware peak
meters?
Jeff Pages
Innes Corporation Pty Ltd
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