When @controllable is %TRUE, this function ensures that future calls to gst_poll_wait() will be affected by gst_poll_restart() and gst_poll_set_flushing().
This function only works for non-timer #GstPoll objects created with gst_poll_new().
new controllable state.
%TRUE if the controllability of @set could be updated.
See Implementation
When @controllable is %TRUE, this function ensures that future calls to gst_poll_wait() will be affected by gst_poll_restart() and gst_poll_set_flushing().
This function only works for non-timer #GstPoll objects created with gst_poll_new().