The codec decoder function table

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

sendTransportEvent

setSemanticMapper

flushDownstream

getLastError

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

In the implementation of a decoding codec, this function table could be implemented as follows:

static struct AP_EventDecoder_Functions EventDecoder_Functions = {
  sendTransportEvent,
  setSemanticMapper,
  flushDownstream,
  getLastErrorDecoder
};

As before, this definition defines a number of library functions as the implementations of the function definitions specified in the Codec Development Specification.