[wdmaudiodev] Peakmeters on Vista build 5472
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 18 Aug 2006 11:13:05 +1000
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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