RE: ac15 and 2.4.5-pre6, pwc format conversion

Dunlap, Randy (randy.dunlap@intel.com)
Fri, 25 May 2001 08:37:26 -0700


> From: Erik Mouw [mailto:J.A.K.Mouw@ITS.TUDelft.NL]
>
> On Fri, May 25, 2001 at 10:48:12AM +0200, Nemosoft Unv. wrote:
> > On 25-May-01 Norbert Preining wrote:
> > > According to ac ChangeLog:
> > > o Rip format conversion out of the pwc driver (me)
> > > | It belongs in user space..
> > >
> > > This change is included in 2.4.5-pre6, but
> > > drivers/usb/pwc-uncompress.c
> > > pwc-uncompress.c:185: warning: implicit declaration of function
> > > `vcvt_420i_420p'
> >
> > Thatīs what you get for ripping out the guts of a driver.
> Have a nice day.
>
> The format conversion shouldn't be there in the first place. Format
> conversion is policy, so it doesn't belong in kernel. Note for example
> that none of the sound drivers does sample rate conversion although
> some sound chips are locked at 48kHz only.

Once upon a time there was an agreement (understanding ?) that this
was to be a major 2.5 change (moving video conversion from kernel
drivers to user space) and that lots of apps would need to be
changed for this to be successful.

~Randy

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