v4l2object: Only allow DMABuf export for STREAMING device

DMABuf exportation requires mmap, which requires STREAMING
capabilities.

https://bugzilla.gnome.org/show_bug.cgi?id=583890

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index 100d033..f24f441 100644 (file)
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -2923,7 +2923,8 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
         mode = GST_V4L2_IO_MMAP;
       }
     }
-  } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP)
+  } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP ||
+      v4l2object->req_mode == GST_V4L2_IO_DMABUF)
     goto method_not_supported;
 
   /* if still no transport selected, error out */