[wdmaudiodev] Re: wasapi audioclientproperties
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 11 Jun 2014 18:48:02 +0000
The PCM-ness is determined by the WAVEFORMATEX you pass to
IAudioClient::Initialize, not by anything you pass to
IAudioClient2::SetClientProperties.
Since you're using exclusive mode anyway, I don't think passing the "raw mode"
flag will have much of an effect. You can think of "raw mode" as a way to get
the "I can bypass processing that I really don't want because X" benefits of
exclusive mode without having to put up with the nasty "but nothing else can
play now" drawbacks.
If you're really interested in direct kernel streaming, there's a sample here:
http://www.microsoft.com/en-us/download/details.aspx?id=18989
The DirectKS sample application program demonstrates how a user-mode client can
achieve direct access to kernel streaming (KS) filters.
You might also explore the ASIO streaming model, which is another way to talk
directly to the driver. (This isn't a Microsoft API, though, so Microsoft won't
be able to support you.)
Like Frank, I'm interested to know *why* you want to get so close to the metal.
Can you give some more detail?
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