pad: Print debug output from gst_pad_link_full() if preparing linking failed

Makes it easier to find linking failures in debug logs.

diff --git a/gst/gstpad.c b/gst/gstpad.c
index f42a0f9..b762465 100644 (file)
--- a/gst/gstpad.c
+++ b/gst/gstpad.c
@@ -2355,8 +2355,12 @@ gst_pad_link_full (GstPad * srcpad, GstPad * sinkpad, GstPadLinkCheck flags)
   /* prepare will also lock the two pads */
   result = gst_pad_link_prepare (srcpad, sinkpad, flags);
 
-  if (G_UNLIKELY (result != GST_PAD_LINK_OK))
+  if (G_UNLIKELY (result != GST_PAD_LINK_OK)) {
+    GST_CAT_INFO (GST_CAT_PADS, "link between %s:%s and %s:%s failed: %s",
+        GST_DEBUG_PAD_NAME (srcpad), GST_DEBUG_PAD_NAME (sinkpad),
+        gst_pad_link_get_name (result));
     goto done;
+  }
 
   /* must set peers before calling the link function */
   GST_PAD_PEER (srcpad) = sinkpad;