vulkansink: Fix null pointer exception

context query might happen before creating swapper.

diff --git a/ext/vulkan/vksink.c b/ext/vulkan/vksink.c
index 3a09ebb..b7d2c27 100644 (file)
--- a/ext/vulkan/vksink.c
+++ b/ext/vulkan/vksink.c
@@ -231,7 +231,8 @@ gst_vulkan_sink_query (GstBaseSink * bsink, GstQuery * query)
       if (gst_vulkan_handle_context_query (GST_ELEMENT (vk_sink), query,
               vk_sink->display, vk_sink->instance, vk_sink->device))
         return TRUE;
-      if (gst_vulkan_queue_handle_context_query (GST_ELEMENT (vk_sink), query,
+      if (vk_sink->swapper &&
+          gst_vulkan_queue_handle_context_query (GST_ELEMENT (vk_sink), query,
               vk_sink->swapper->queue))
         return TRUE;