chain_default

Description:

public static FlowReturn chain_default (Pad pad, Object? parent, owned Buffer buffer)

Invoke the default chain function of the proxy pad.

pad	a sink Pad, returns GST_FLOW_ERROR if not.
parent	the parent of `pad` or `null`
buffer	the Buffer to send, return GST_FLOW_ERROR if not.

a FlowReturn from the pad.