This is a work-in-progress spectrum analzyer application for Software Defined Radio (SDR) on Linux.
It's heavily optimzed to run well on the Raspberry Pi and is part of a larger project to buil a shortwave transciever hat for the Raspberry Pi.
Spec creates an AF_UNIX DGRAM socket at /tmp/sdrclient and expects FFT data as packets of float32 array of length 2048.
You need to perform the FFT in another process and send the data to spec. This will be incorporeted in the SDR solution I'm building.
$ make$ ./spec