Library for accessing DVDs like block devices with transparent decryption

libdvdcss is a simple library designed for accessing DVDs like a block device
without having to bother about the decryption. The important features are:
 * Portability: currently supported platforms are GNU/Linux, FreeBSD, NetBSD,
   OpenBSD, BSD/OS, BeOS, Windows 95/98/ME, Windows NT/2000/XP, MacOS X,
   Solaris, HP-UX and OS/2.
 * Adaptability: unlike most similar projects, libdvdcss doesn't require the
   region of your drive to be set and will try its best to read from the disc
   even in the case of a region mismatch.
 * Simplicity: a DVD player can be built around the libdvdcss API using no
   more than 6 library calls.