If the codec being implemented is to act as an encoder, it needs to implement the encoder functions listed previously and map them in an encoder function table. This structure is defined in EventCodec.h as an AP_EventEncoder_Functions structure with the following functions:

See the AP_EventEncoder_Functions structure in the API Reference for C++ (Doxygen) for detailed information.

In the implementation of an encoding codec, this function table could be implemented as follows:

This time, the library functions sendNormalisedEvent, flushUpstream,getLastError, addEventTransport and removeEventTransport are being defined as the implementations of the Codec Development Specification's sendNormalisedEvent, flushUpstream,getLastError, addEventTransport and removeEventTransport function definitions respectively.