v4l2object: Orphan buffer pool on object_stop if supported

Use V4L2 buffer orphaning, on recent kernels so that
the device can be restarted immediately with
a new buffer pool during renogatiation.

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index 01c5abf..dad426a 100644 (file)
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -4158,9 +4158,11 @@ gst_v4l2_object_stop (GstV4l2Object * v4l2object)
     goto done;
 
   if (v4l2object->pool) {
-    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
-    gst_buffer_pool_set_active (v4l2object->pool, FALSE);
-    gst_object_unref (v4l2object->pool);
+    if (!gst_v4l2_buffer_pool_orphan (&v4l2object->pool)) {
+      GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
+      gst_buffer_pool_set_active (v4l2object->pool, FALSE);
+      gst_object_unref (v4l2object->pool);
+    }
     v4l2object->pool = NULL;
   }