Sends the event to the pad. This function can be used by applications to send events in the pipeline.
If pad is a source pad, event should be an upstream event. If pad is a sink pad, event should be a downstream event. For example, you would not send a GST_EVENT_EOS on a src pad; EOS events only propagate downstream. Furthermore, some downstream events have to be serialized with data flow, like EOS, while some can travel out-of-band, like GST_EVENT_FLUSH_START If the event needs to be serialized with data flow, this function will take the pad's stream lock while calling its event function.
To find out whether an event type is upstream, downstream, or downstream and serialized, see GstEventTypeFlags, Event.typeGetFlags, GST_EVENT_IS_UPSTREAM, GST_EVENT_IS_DOWNSTREAM, and GST_EVENT_IS_SERIALIZED Note that in practice that an application or plugin doesn't need to bother itself with this information; the core handles all necessary locks and checks.
This function takes ownership of the provided event so you should Event.ref it if you want to reuse the event after this call.