This program is named after the venerable UNIX classic wc; "s" stands for either "sound" or "second", depending on which you prefer. Given a list of files, it computes the summed length (in hours, minutes, and seconds) of the files.
The code here is provided mostly as a demo of linking C and Python with sWIG, though I use it in my own (acoustic phonetics) research.
A pecularity of the binary swc is that it uses glob internally. So if the following happens:
$ swc wav/*.wav
-bash: /usr/local/bin/swc: Argument list too long
This will work:
$ swc 'wav/*.wav'
28:08:18.25
This surely has some bad consequences, but not ones that come up normally.
You will need SWIG and the libsndfile headers. Once you have them, issue:
make; sudo make install