From d19499c7960fba97e6142dc72d49825e834e3419 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sun, 8 Jul 2012 04:07:05 +0200
Subject: [PATCH] vf_gradfun: don't store two pointers to one
 AVFilterBufferRef.

---
 libavfilter/vf_gradfun.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavfilter/vf_gradfun.c b/libavfilter/vf_gradfun.c
index 71749fe7a9..735bd503a0 100644
--- a/libavfilter/vf_gradfun.c
+++ b/libavfilter/vf_gradfun.c
@@ -191,7 +191,7 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
         outpicref->video->w = outlink->w;
         outpicref->video->h = outlink->h;
     } else
-        outpicref = inpicref;
+        outpicref = avfilter_ref_buffer(inpicref, ~0);
 
     outlink->out_buf = outpicref;
     ff_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0));
@@ -226,8 +226,7 @@ static void end_frame(AVFilterLink *inlink)
     ff_draw_slice(outlink, 0, inlink->h, 1);
     ff_end_frame(outlink);
     avfilter_unref_buffer(inpic);
-    if (outpic != inpic)
-        avfilter_unref_buffer(outpic);
+    avfilter_unref_buffer(outpic);
 }
 
 AVFilter avfilter_vf_gradfun = {