rtbuf.c is an implementation of a buffering scheme using the POSIX realtime features. Its aim is to provide smooth playback of MPEG audio streams even on a very heavily loaded machine. It uses many advanced features of the operating system: -

This code forms a set of C++ libraries for multimedia streaming, using open standard protocols (RTP/RTCP, RTSP, SIP). These libraries - which can be compiled for Unix (including Linux and Mac OS X), Windows, and QNX (and other POSIX-compliant systems