[FFmpeg-devel] [PATCH] Add lut filter.
michaelni at gmx.at
Sun Jun 5 22:31:43 CEST 2011
On Sat, May 28, 2011 at 11:04:07PM +0200, Stefano Sabatini wrote:
> On date Friday 2010-12-03 13:02:59 +0100, Stefano Sabatini wrote:
> > On date Friday 2010-12-03 02:04:47 +0100, Michael Niedermayer encoded:
> > > the expression filter has been used to draw mandelbrot fractals, to texture
> > > map videos onto moving polygons and other things i forgot.
> > > a LUT is a good idea because its a hell alot faster but theres alot for which
> > > a generic expression evaluator is needed.
> > Here it is a first scratch.
> > This should be equivalent to the negate filter:
> > lut='y=maxv+minv-v:u=maxv+minv-v:v=maxv+minv-v'
> > (now I see that maybe 'v' was not a good choice for the input value).
> > it should be also possible to "wrap" a negate filter around this by
> > simply implementing a negate_init() function (but still lacks support
> > for monow/monob).
> > So having native support for monow/monob is the only reason for
> > keeping the negate filter, but maybe I can conceive some way to
> > support bitstream formats.
> > --
> > FFmpeg = Foolish Formidable Miracolous Philosophical Enhanced Gangster
> > From ecda1bb4846754d2a651d2c80414563d7a9e19a7 Mon Sep 17 00:00:00 2001
> > From: Stefano Sabatini <stefano.sabatini-lala at poste.it>
> > Date: Fri, 3 Dec 2010 12:45:29 +0100
> > Subject: [PATCH] Implement lut filter.
> Updated with RGB support and an example negate filter.
> Still missing documentation.
patches look good except what has been already mentioned.
Also support for 9/10/...bit could be added later
and great work!
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Old school: Use the lowest level language in which you can solve the problem
New school: Use the highest level language in which the latest supercomputer
can solve the problem without the user falling asleep waiting.
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