This merge requests adds support for using FLAC encoded audio streams. The usage of the FLAC codec is enabled by the command line option
-C FLAC when starting the sender. The receiver automatically detects the required decoder.
Note, that using FLAC encoded audio streams breaks compatibility with the Openhome Protocol Specification which only defines PCM audio streams.
Nevertheless, using a FLAC encoded audio stream has the advantage of saving bandwith, which is essential in wireless networks.