From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 15 Jun 2012 23:54:11 +0000 (+0200)
Subject: vf_pad: check that we have write permission before writing in the buffer.
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=46c50b1726b27604f05511f7661e1e40e891a0e5;p=ffmpeg

vf_pad: check that we have write permission before writing in the buffer.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---

diff --git a/libavfilter/vf_pad.c b/libavfilter/vf_pad.c
index 413fde1f6ca..08a1f8e6682 100644
--- a/libavfilter/vf_pad.c
+++ b/libavfilter/vf_pad.c
@@ -284,7 +284,7 @@ static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
           )
             break;
     }
-    pad->needs_copy= plane < 4 && outpicref->data[plane];
+    pad->needs_copy= plane < 4 && outpicref->data[plane] || !(outpicref->perms & AV_PERM_WRITE);
     if(pad->needs_copy){
         av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
         avfilter_unref_buffer(outpicref);