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Implement null video sink.

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Originally committed as revision 21242 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-01-16 11:05:36 +00:00
parent 864a074213
commit 006aa1a4c2
5 changed files with 60 additions and 1 deletions
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10
doc/libavfilter.texi
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@ -213,4 +213,14 @@ the configured source.
The default values of ``width'' and ``height'' are respectively 352 The default values of ``width'' and ``height'' are respectively 352
and 288 (corresponding to the CIF size format). and 288 (corresponding to the CIF size format).
@chapter Available video sinks
Below is a description of the currently available video sinks.
@section nullsink
Null video sink, do absolutely nothing with the input video. It is
mainly useful as a template and to be employed in analysis / debugging
tools.
@bye @bye

2
libavfilter/Makefile
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@ -22,4 +22,6 @@ OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o
OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o
include $(SUBDIR)../subdir.mak include $(SUBDIR)../subdir.mak

2
libavfilter/allfilters.c
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@ -43,4 +43,6 @@ void avfilter_register_all(void)
REGISTER_FILTER (VFLIP, vflip, vf); REGISTER_FILTER (VFLIP, vflip, vf);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc); REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
REGISTER_FILTER(NULLSINK, nullsink, vsink);
} }

2
libavfilter/avfilter.h
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@ -25,7 +25,7 @@
#include "libavutil/avutil.h" #include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 1 #define LIBAVFILTER_VERSION_MAJOR 1
#define LIBAVFILTER_VERSION_MINOR 16 #define LIBAVFILTER_VERSION_MINOR 17
#define LIBAVFILTER_VERSION_MICRO 0 #define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \ #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

45
libavfilter/vsink_nullsink.c Normal file
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@ -0,0 +1,45 @@
/*
* 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
*/
#include "avfilter.h"
static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
{
}
static void end_frame(AVFilterLink *link)
{
}
AVFilter avfilter_vsink_nullsink = {
.name = "nullsink",
.description = "Do absolutely nothing with the input video.",
.priv_size = 0,
.inputs = (AVFilterPad[]) {
{
.name = "default",
.type = CODEC_TYPE_VIDEO,
.start_frame = start_frame,
.end_frame = end_frame,
},
{ .name = NULL},
},
.outputs = (AVFilterPad[]) {{ .name = NULL }},
};