PipeWire multimedia server - tests and examples

 PipeWire is a server and user space API to deal with multimedia
 pipelines. This includes:
 .
  - Making available sources of audio and video (such as from a capture devices
    or application provided streams) and multiplexing this with clients.
  - Accessing sources of audio and video for consumption.
  - Generating graphs for audio and video processing.
 .
 This package contains automated and manual tests and example programs.