[wdmaudiodev] Re: kmixer bypassing
- From: Uwe Kirst <u.kirst@xxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Tue, 29 May 2007 10:55:01 +0200
Jerry Evans schrieb:
Hi Uwe
Interesting. Does your bypass mode get the expected performance
increase? Is it possible for you to describe in slightly more detail
how the driver is installed/configured?
Thx. I'm off to dig out the NT4 DDK :-)
Hello Jerry,
yes I'm getting lower latencies. In fact the latency I see is comparable
to nt4 drivers. The relevant files in the nt4 ddk are WAVEDD.C and
MMDRV.C. I would suggest that you start with a dummy version, which
implements WODM_GETNUMDEVS and WODM_GETDEVCAPS. The step up from w2k to
xp was relativly complicated so I would suggest that you try out w2k first.
Installation:
Add 2 lines to your .inf file which installs a wdm streaming driver (my
is portclass based), when xx_mme.dll is your bypass driver:
HKR,Drivers\wave\xx_mme.dll,Driver,,xx_mme.dll
HKK,Drivers\wave\xx_mme.dll,Description,,%yourDescription%
I have also installed the microsoft driver "wdmaud.drv".
/Uwe
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