int sipxL16encode(const void *pAudioBuffer, unsigned cbAudioSamples, int *rSamplesConsumed, void *pCodedData, unsigned cbMaxCodedData, int *pcbCodedSize)
int sipxL16decode(const void *pCodedData, unsigned cbCodedPacketSize, void *pAudioBuffer, unsigned cbBufferSize, unsigned *pcbCodedSize)