msdkvpp: check mfx surface nullity for the input buffer

In theory it should not happen but it happened to me
in some cases where it failed to allocate some video
buffers so this was a consequence of a corner case.
Better to be safe than sorry.

diff --git a/sys/msdk/gstmsdkvpp.c b/sys/msdk/gstmsdkvpp.c
index 66b32e0..23c2dbc 100644 (file)
--- a/sys/msdk/gstmsdkvpp.c
+++ b/sys/msdk/gstmsdkvpp.c
@@ -729,11 +729,17 @@ gst_msdkvpp_transform (GstBaseTransform * trans, GstBuffer * inbuf,
   if (!in_surface)
     return GST_FLOW_ERROR;
 
+  if (!in_surface->surface) {
+    GST_ERROR_OBJECT (thiz, "mfx surface is NULL for the current input buffer");
+    free_msdk_surface (in_surface);
+    return GST_FLOW_ERROR;
+  }
+
   if (gst_msdk_is_msdk_buffer (outbuf)) {
     out_surface = g_slice_new0 (MsdkSurface);
     out_surface->surface = gst_msdk_get_surface_from_buffer (outbuf);
   } else {
-    GST_ERROR ("Failed to get msdk outsurface!");
+    GST_ERROR_OBJECT (thiz, "Failed to get msdk outsurface!");
     free_msdk_surface (in_surface);
     return GST_FLOW_ERROR;
   }