Overview of NSAPI Functions for Filter Development

NSAPI provides a set of C functions that are used to implement SAFs and filters. This section lists the functions that are specific to the development of filters. All of the public routines are described in detail in Chapter 4, NSAPI Function Reference.

The NSAPI functions specific to the development of filters are:

• filter_create creates a new filter

• filter_insert inserts the specified filter into a filter stack

• filter_remove removes the specified filter from a filter stack

• filter_name returns the name of the specified filter

• filter_find finds an existing filter given a filter name

• filter_layer returns the layer in a filter stack that corresponds to the specified filter