From 891aeeee72b2d57d380ca097cc34be2b0c360233 Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Thu, 13 Jan 2011 01:00:36 +0000
Subject: [PATCH] Check linked pads media type mismatch in avfilter_link().

Originally committed as revision 26325 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavfilter/avfilter.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index ebb2165184..6ecd4ce4c2 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -107,6 +107,13 @@ int avfilter_link(AVFilterContext *src, unsigned srcpad,
         src->outputs[srcpad]        || dst->inputs[dstpad])
         return -1;
 
+    if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
+        av_log(src, AV_LOG_ERROR,
+               "Media type mismatch between the '%s' filter output pad %d and the '%s' filter input pad %d\n",
+               src->name, srcpad, dst->name, dstpad);
+        return AVERROR(EINVAL);
+    }
+
     src->outputs[srcpad] =
     dst-> inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));