[wdmaudiodev] Re: Virtual Audio Driver development based on AVStream model.

  • From: Anton Shpakovsky <anton.shpakovsky@xxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Mon, 13 Dec 2010 16:26:33 +0600

Thanks for the answer, Rob.

Yes, that's a kind of solution, but:
virtual audio cable is a playback device also. I would not like to confuse
user - I want a microphone device only.

I'm now looking forward to modify msvad CopyFrom function, but I'm a bit
scared. So many questions on this topic are on the web
and it looks like nobody has succeeded in. I would appreciate if someone
could provide me with their modifications of msvad.

I'm scared, my head is goind to blow up..
Thanks a lot for your help!

On Thu, Dec 9, 2010 at 7:25 PM, Robert Bielik <robert.bielik@xxxxxxxxxx>wrote:

> Anton Shpakovsky skrev 2010-12-09 13:47:
>> Hello,
>> I'm developing a virtual microphone that should do a simple task - play a
>> PCM file provided by a client application.
>> I've looked through large amount of articles/forums - the information is
>> pretty similar everywhere.
>> According to WDK I've known that there are three models of audio drivers:
>> PortCls(msvad), Avstream(avssamp & avshws) and Stream Class (deprecated).
> I'd go with MSVAD. However, you could simply achieve the same thing with an
> application playing to a device that just copies
> its data from render pin to capture pin, as Virtual Audio Cable does. Then
> you won't have to write a driver at all :)
> /Rob
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