Register a new #GstMeta implementation.
The same @info can be retrieved later with gst_meta_get_info() by using @impl as the key.
the type of the #GstMeta API
the name of the #GstMeta implementation
the size of the #GstMeta structure
a #GstMetaInitFunction
a #GstMetaFreeFunction
a #GstMetaTransformFunction
Return: a #GstMetaInfo that can be used to access metadata.
See Implementation
Register a new #GstMeta implementation.
The same @info can be retrieved later with gst_meta_get_info() by using @impl as the key.