[wdmaudiodev] Re: Problem With Wave System
- From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 14 Nov 2007 09:35:38 +1100
Chinmay,
Have you tried elevating the priority of your thread and/or process to
THREAD_PRIORITY_TIME_CRITICAL and REALTIME_PRIORITY_CLASS respectively?
Jeff
----- Original Message -----
From: "Chinmay Mahata" <chinmay.mahata@xxxxxxxxx>
To: "wdmaudiodev" <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Wednesday, November 14, 2007 2:45 AM
Subject: [wdmaudiodev] Problem With Wave System
Hi,
We have developed WDM miniport driver for a 4 port PCI card. We also
have an application to play and record wave files using the standard
multi-media wave APIs (waveInXxx, waveOutXxx). In the application we
are using a worker thread created using _beginthreadex() call. If we
run our application (using GUI) without switching to other
(independent) windows (not minimizing/maximizing it), our play/record
gets succeeded.
But if we run our application (using GUI) and open a separate cmd
window and maximize/minimize it, then we are getting some jitter in
playing the wave file. Also the application is unable to record the
whole file. Here in the driver, we observed -- from the wave system
the driver is getting very frequent PAUSE and almost immediate RUN
command even if from the application we are not calling any multimedia
API to cause wave system to do that. This is creating a great problem
for us.
Could anyone please give me some hint about --
why we are getting so many PAUSE/RUN
request from the wave system even if the application is not asking for
it;
how we can minimize the number of
PAUSE/RUN request from the wave system.
Any help is appreciated.
Best regards,
--Chinmay
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