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SubjectRe: [v4l-dvb-maintainer] [PATCH] USB: add Sensoray 2255 v4l driver
On Thu, May 15, 2008 at 03:17:42AM +0200, Markus Rechberger wrote:
> Hi Dean, Greg,

Adding dean to the cc: line... :)
> On 5/14/08, Greg KH <> wrote:
> > From: Dean Anderson <>
> >

<big patch snipped>

> Why do you do those conversions in kernelspace?
> ffmpeg/libswscale has optimized code for colourspace conversions.
> I know a few drivers do that in kernelspace but it's way more flexible
> in userspace and depending on the optimization requires less CPU
> power.

I thought they were there as needed by some V4L1 applications, but that
code was recently removed by Dean I think. If they don't need to be
there, and userspace apps can properly handle the different colorspace,
then I'll be glad to remove them.


greg k-h

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