Mathieu Duponchelle authored Apr 01, 2019 and Mathieu Duponchelle committed Apr 05, 2019

The signal will be emitted when a buffer was consumed on
a pad, if the newly-added "emit-signals" property has been
set to TRUE.

Handlers connected to the signal will receive a valid reference on
the consumed buffer, allowing for example the retrieval of metas in
order to forward them once an output buffer is pushed out.