How to achieve higher frame rate WDM Stream classs mini drivers

NTDEV
1

Hi,

I have developed a stream class mini driver, which talks to bus drivers for
getting video data. In this case, I have a specific need in which I need to
achieve upto 120 frames/second in 640x480 display mode. Till now, I am
unable to do so. I am able to achieve around 120 frames/second ONLY in
160x120 video mode. As the frame size increase, the frame rate decreases
drastically.

Can anyone let me know how to achieve higher frame rate (120 frames/sec) in
640x480 video mode?

Thanks
Srikanth.R.K.

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2

I would guess that data rate is too high for whatever bus you push it
through. It could also be that video card performance is insufficient to
handle data rate in question.

Just in case make sure that maximal data rate you specify in
VIDEOINFO/VIDEOINFO2 format structure for corresponding stream is
sufficient to cover worst case scenario. I don’t think it’ll help though.

Max.

— “Srikanth.R.K.” wrote:
> Hi,
>
> I have developed a stream class mini driver, which talks to bus drivers
> for
> getting video data. In this case, I have a specific need in which I need
> to
> achieve upto 120 frames/second in 640x480 display mode. Till now, I am
> unable to do so. I am able to achieve around 120 frames/second ONLY in
> 160x120 video mode. As the frame size increase, the frame rate decreases
> drastically.
>
> Can anyone let me know how to achieve higher frame rate (120 frames/sec)
> in
> 640x480 video mode?
>
> Thanks
> Srikanth.R.K.
>
> —
> You are currently subscribed to ntdev as: xxxxx@yahoo.com
> To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com

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