"Nemosoft Unv." wrote:
>
> On 29-May-01 Jeroen Vreeken wrote:
> > On 2001.05.30 11:47:23 +0200 Brad Hards wrote:
> >> Without knowing the details, I risk making a fool of myself, but would it
> >>
> >> be possible to use a similar approach to gpm? So we use a named pipe or
> >> similar in user space, generated by vfm (video format manager:).
> >> General idea is
> >> device driver exports to kernel V4L
> >> kernel V4L exports to userspace on /dev/videodataXX
> >> userspace daemon opens /dev/videodataXX and munges formats to
> >> /dev/videoXX
> >> old style clients use /dev/videoXX (hopefully without much change)
> >> new style clients use /dev/videodataXX
>
> I would reverse the names, making the �old style� videodevices something
> like /dev/fmtvideoXX (formatted video), and �new style� would be
> /dev/videoXX. Otherwise nobody would notice and nothing would ever get done.
> Most tools allow you to specify which video device to use with a command
> line parameter (or dropdown box, with my own camstream :-)), so that�s not a
> problem. Should that not be possible, nothing you cannot fix without a
> symlink :)
I think we agree on effects. My suggestion was deliberately set up so people
_wouldn't_ notice, because they shouldn't have to in the middle of a stable
kernel series. You upgrade from 2.4.4 to 2.4.5 and user space things don't
suffer gratituous breakage.
Brad
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