QAudioDeviceInfo::availableDevices always returning devices even when no microphone is attached.

[musimbate]

Hello ,
I am trying to enumerate audio devices on the system (Windows7 Qt4.8 msvc2010) and the call to

QAudioDeviceInfo::availableDevices ( QAudio::AudioInput );

always returns a list with a few devices even when I have no device( attached to the PC.
It is returning

Microphone /Line In(Sigmatel)  and 
default

on one of my test boxes.I suspect that it is a problem with the system set up on my particular machine as I tested on a machine(Desktop) at my workplace by chance and it returns 0 when there is no microphone attached.

This problem doesn't only affect QAudioDeviceInfo ,it also affects my openCV module to detect the attached web cams.(I know this is another topic but I suspect that the two problems are related).

Any hints on how I can get QAudioDeviceInfo::availableDevices to return 0 when no mic is attached ?

Thank you for your time.

[SGaist]

Hi,

That's rather a Windows problem. Qt queries Windows to get the list of devices so it's your system that's returning something fishy