v4l2: make sure the element is not deleted before the pool

The pool accesses data from the v4l2object so it must exist at least
as long as the pool. Refcount the element which controls the object
live-time.

https://bugzilla.gnome.org/show_bug.cgi?id=701650

diff --git a/sys/v4l2/gstv4l2bufferpool.c b/sys/v4l2/gstv4l2bufferpool.c
index 34a444b..3ead390 100644 (file)
--- a/sys/v4l2/gstv4l2bufferpool.c
+++ b/sys/v4l2/gstv4l2bufferpool.c
@@ -1017,6 +1017,8 @@ gst_v4l2_buffer_pool_finalize (GObject * object)
     gst_object_unref (pool->allocator);
   g_free (pool->buffers);
 
+  gst_object_unref (pool->obj->element);
+
   G_OBJECT_CLASS (parent_class)->finalize (object);
 }
 
@@ -1070,6 +1072,8 @@ gst_v4l2_buffer_pool_new (GstV4l2Object * obj, GstCaps * caps)
   gst_buffer_pool_config_set_params (s, caps, obj->sizeimage, 2, 0);
   gst_buffer_pool_set_config (GST_BUFFER_POOL_CAST (pool), s);
 
+  gst_object_ref (obj->element);
+
   return GST_BUFFER_POOL (pool);
 
   /* ERRORS */