[FFmpeg-devel] [PATCH] lavfi: port MP swapuv filter

Stefano Sabatini stefasab at gmail.com
Fri Mar 9 17:02:51 CET 2012


On date Thursday 2012-03-08 17:11:51 +0100, Michael Niedermayer encoded:
> On Thu, Mar 08, 2012 at 04:33:09PM +0100, Stefano Sabatini wrote:
> > ---
> >  doc/filters.texi         |    3 +
> >  libavfilter/Makefile     |    1 +
> >  libavfilter/allfilters.c |    1 +
> >  libavfilter/vf_swapuv.c  |   97 ++++++++++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 102 insertions(+), 0 deletions(-)
> >  create mode 100644 libavfilter/vf_swapuv.c
> > 
> > diff --git a/doc/filters.texi b/doc/filters.texi
> > index 2c646cb..b32de63 100644
> > --- a/doc/filters.texi
> > +++ b/doc/filters.texi
> > @@ -2631,6 +2631,9 @@ For example:
> >  will create two separate outputs from the same input, one cropped and
> >  one padded.
> >  
> > + at section swapuv
> > +Swap U & V plane.
> > +
> >  @section thumbnail
> >  Select the most representative frame in a given sequence of consecutive frames.
> >  
> > diff --git a/libavfilter/Makefile b/libavfilter/Makefile
> > index df3a27f..3bdb189 100644
> > --- a/libavfilter/Makefile
> > +++ b/libavfilter/Makefile
> > @@ -87,6 +87,7 @@ OBJS-$(CONFIG_SETTB_FILTER)                  += vf_settb.o
> >  OBJS-$(CONFIG_SHOWINFO_FILTER)               += vf_showinfo.o
> >  OBJS-$(CONFIG_SLICIFY_FILTER)                += vf_slicify.o
> >  OBJS-$(CONFIG_SPLIT_FILTER)                  += vf_split.o
> > +OBJS-$(CONFIG_SWAPUV_FILTER)                 += vf_swapuv.o
> >  OBJS-$(CONFIG_THUMBNAIL_FILTER)              += vf_thumbnail.o
> >  OBJS-$(CONFIG_TINTERLACE_FILTER)             += vf_tinterlace.o
> >  OBJS-$(CONFIG_TRANSPOSE_FILTER)              += vf_transpose.o
> > diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
> > index f6230be..f0a7f8b 100644
> > --- a/libavfilter/allfilters.c
> > +++ b/libavfilter/allfilters.c
> > @@ -95,6 +95,7 @@ void avfilter_register_all(void)
> >      REGISTER_FILTER (SHOWINFO,    showinfo,    vf);
> >      REGISTER_FILTER (SLICIFY,     slicify,     vf);
> >      REGISTER_FILTER (SPLIT,       split,       vf);
> > +    REGISTER_FILTER (SWAPUV,      swapuv,      vf);
> >      REGISTER_FILTER (THUMBNAIL,   thumbnail,   vf);
> >      REGISTER_FILTER (TINTERLACE,  tinterlace,  vf);
> >      REGISTER_FILTER (TRANSPOSE,   transpose,   vf);
> > diff --git a/libavfilter/vf_swapuv.c b/libavfilter/vf_swapuv.c
> > new file mode 100644
> > index 0000000..cdd4702
> > --- /dev/null
> > +++ b/libavfilter/vf_swapuv.c
> > @@ -0,0 +1,97 @@
> > +/*
> > + * Copyright (c) 2002 Michael Niedermayer <michaelni at gmx.at>
> > + *
> > + * This file is part of FFmpeg.
> > + *
> > + * FFmpeg is free software; you can redistribute it and/or
> > + * modify it under the terms of the GNU Lesser General Public
> > + * License as published by the Free Software Foundation; either
> > + * version 2.1 of the License, or (at your option) any later version.
> > + *
> > + * FFmpeg is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> > + * Lesser General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU Lesser General Public
> > + * License along with FFmpeg; if not, write to the Free Software
> > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> > + */
> > +
> > +/**
> > + * @file
> > + * swap UV filter
> > + */
> > +
> > +#include "avfilter.h"
> > +
> > +static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
> > +                                           int w, int h)
> > +{
> > +    AVFilterBufferRef *picref =
> > +        avfilter_default_get_video_buffer(link, perms, w, h);
> > +    uint8_t *tmp;
> > +    int tmp2;
> > +
> > +    picref->data[0] = picref->data[0];
> > +    tmp = picref->data[2]; picref->data[2] = picref->data[1]; picref->data[1] = tmp;
> 
> > +    picref->data[3] = picref->data[3];
> > +
> > +    picref->linesize[0] = picref->linesize[0];
> 
> these 2 and a few others look unneeded

Allright.
Note also that I'm relicensing it to LGPL if you're fine with it.

BTW, is OK to nuke the swapuv filter from libavfilter/libmpcodecs?
-- 
FFmpeg = Fostering Fabulous Mega Peaceful Enhancing Guide
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