[wdmaudiodev] Re: Audio filter driver
- From: Robert Bielik <robert.bielik@xxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 09 Jun 2010 16:08:07 +0200
uwekirst skrev:
I would assume that a WaveRT driver adds the same or at least almost the
same amount of latency than WaveCyclic (10-20 ms) since the latency is
introduced by the windows audio stack (mixing, samplerateconversion,
copying etc.) which is the same for both driver models.
Hmmm... yes, though I just had an idea. Would the following construct be
feasible: Have a render only virtual device, writing
into locked shared memory, which a user mode process then processes, and passes
data on via WDM-KS (synchronizing via
read/write ptrs in a circular buffer)?
The amount of latency depends on how the user mode software accesses the
driver. The DirectKS example app for example adds no latency.
From the WDK, right ?
/R
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