Revision 006aa1a4

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doc/libavfilter.texi
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The default values of ``width'' and ``height'' are respectively 352
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and 288 (corresponding to the CIF size format).
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@chapter Available video sinks
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Below is a description of the currently available video sinks.
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@section nullsink
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Null video sink, do absolutely nothing with the input video. It is
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mainly useful as a template and to be employed in analysis / debugging
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tools.
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@bye
libavfilter/Makefile
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OBJS-$(CONFIG_NULLSRC_FILTER)                += vsrc_nullsrc.o
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OBJS-$(CONFIG_NULLSINK_FILTER)               += vsink_nullsink.o
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include $(SUBDIR)../subdir.mak
libavfilter/allfilters.c
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    REGISTER_FILTER (VFLIP, vflip, vf);
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    REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
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    REGISTER_FILTER(NULLSINK, nullsink, vsink);
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}
libavfilter/avfilter.h
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#include "libavutil/avutil.h"
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#define LIBAVFILTER_VERSION_MAJOR  1
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#define LIBAVFILTER_VERSION_MINOR 16
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#define LIBAVFILTER_VERSION_MINOR 17
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#define LIBAVFILTER_VERSION_MICRO  0
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
libavfilter/vsink_nullsink.c
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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "avfilter.h"
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static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
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{
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}
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static void end_frame(AVFilterLink *link)
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{
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}
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AVFilter avfilter_vsink_nullsink = {
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    .name        = "nullsink",
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    .description = "Do absolutely nothing with the input video.",
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    .priv_size = 0,
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    .inputs    = (AVFilterPad[]) {
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        {
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            .name            = "default",
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            .type            = CODEC_TYPE_VIDEO,
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            .start_frame     = start_frame,
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            .end_frame       = end_frame,
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        },
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        { .name = NULL},
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    },
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    .outputs   = (AVFilterPad[]) {{ .name = NULL }},
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};

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