From 006aa1a4c2307209ad11c3ad0ad1d888c8df98fe Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Sat, 16 Jan 2010 11:05:36 +0000
Subject: [PATCH] Implement null video sink.

Originally committed as revision 21242 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 doc/libavfilter.texi                           | 10 +++++++
 libavfilter/Makefile                           |  2 ++
 libavfilter/allfilters.c                       |  2 ++
 libavfilter/avfilter.h                         |  2 +-
 libavfilter/{allfilters.c => vsink_nullsink.c} | 41 +++++++++++++-------------
 5 files changed, 35 insertions(+), 22 deletions(-)
 copy libavfilter/{allfilters.c => vsink_nullsink.c} (53%)

diff --git a/doc/libavfilter.texi b/doc/libavfilter.texi
index 28f24bce9f..5bb5235898 100644
--- a/doc/libavfilter.texi
+++ b/doc/libavfilter.texi
@@ -213,4 +213,14 @@ the configured source.
 The default values of ``width'' and ``height'' are respectively 352
 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
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 08d60800f4..fd95e35c80 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -22,4 +22,6 @@ OBJS-$(CONFIG_VFLIP_FILTER)                  += vf_vflip.o
 
 OBJS-$(CONFIG_NULLSRC_FILTER)                += vsrc_nullsrc.o
 
+OBJS-$(CONFIG_NULLSINK_FILTER)               += vsink_nullsink.o
+
 include $(SUBDIR)../subdir.mak
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 81eec21598..4be7642da9 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -43,4 +43,6 @@ void avfilter_register_all(void)
     REGISTER_FILTER (VFLIP, vflip, vf);
 
     REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
+
+    REGISTER_FILTER(NULLSINK, nullsink, vsink);
 }
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 5b85427ac1..832f421bee 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -25,7 +25,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  1
-#define LIBAVFILTER_VERSION_MINOR 16
+#define LIBAVFILTER_VERSION_MINOR 17
 #define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/allfilters.c b/libavfilter/vsink_nullsink.c
similarity index 53%
copy from libavfilter/allfilters.c
copy to libavfilter/vsink_nullsink.c
index 81eec21598..d87f20400b 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/vsink_nullsink.c
@@ -1,7 +1,4 @@
 /*
- * filter registration
- * copyright (c) 2008 Vitor Sessak
- *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
@@ -21,26 +18,28 @@
 
 #include "avfilter.h"
 
+static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+{
+}
 
-#define REGISTER_FILTER(X,x,y) { \
-          extern AVFilter avfilter_##y##_##x ; \
-          if(CONFIG_##X##_FILTER )  avfilter_register(&avfilter_##y##_##x ); }
-
-void avfilter_register_all(void)
+static void end_frame(AVFilterLink *link)
 {
-    static int initialized;
+}
 
-    if (initialized)
-        return;
-    initialized = 1;
+AVFilter avfilter_vsink_nullsink = {
+    .name        = "nullsink",
+    .description = "Do absolutely nothing with the input video.",
 
-    REGISTER_FILTER (CROP, crop, vf);
-    REGISTER_FILTER (FORMAT, format, vf);
-    REGISTER_FILTER (NOFORMAT, noformat, vf);
-    REGISTER_FILTER (NULL, null, vf);
-    REGISTER_FILTER (SCALE, scale, vf);
-    REGISTER_FILTER (SLICIFY, slicify, vf);
-    REGISTER_FILTER (VFLIP, vflip, vf);
+    .priv_size = 0,
 
-    REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
-}
+    .inputs    = (AVFilterPad[]) {
+        {
+            .name            = "default",
+            .type            = CODEC_TYPE_VIDEO,
+            .start_frame     = start_frame,
+            .end_frame       = end_frame,
+        },
+        { .name = NULL},
+    },
+    .outputs   = (AVFilterPad[]) {{ .name = NULL }},
+};
-- 
2.11.0