Change the flushing state of all the pads in the collection. No pad
is able to accept anymore data when @flushing is %TRUE. Calling this
function with @flushing %FALSE makes @pads accept data again.
Caller must ensure that downstream streaming (thread) is not blocked,
e.g. by sending a FLUSH_START downstream.
Change the flushing state of all the pads in the collection. No pad is able to accept anymore data when @flushing is %TRUE. Calling this function with @flushing %FALSE makes @pads accept data again. Caller must ensure that downstream streaming (thread) is not blocked, e.g. by sending a FLUSH_START downstream.
MT safe.