waylandsink: Add exception code for setting wl_surface

Waylandsink needs exception code in gst_wayland_sink_set_window_handle().
After making sink->window, User can call
gst_wayland_sink_set_window_handle(). It is the user's fault, but
Waylandsink needs to handle the exception, if not then sink->window is
changed and rendering fails.

https://bugzilla.gnome.org/show_bug.cgi?id=747482

diff --git a/ext/wayland/gstwaylandsink.c b/ext/wayland/gstwaylandsink.c
index a385932..10d477e 100644 (file)
--- a/ext/wayland/gstwaylandsink.c
+++ b/ext/wayland/gstwaylandsink.c
@@ -727,6 +727,11 @@ gst_wayland_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle)
 
   g_return_if_fail (sink != NULL);
 
+  if (sink->window != NULL) {
+    GST_WARNING_OBJECT (sink, "changing window handle is not supported");
+    return;
+  }
+
   g_mutex_lock (&sink->render_lock);
 
   GST_DEBUG_OBJECT (sink, "Setting window handle %" GST_PTR_FORMAT,