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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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