On the origin of the files:
==========================

The code is a mixture of libdvdread and libdvdcss.

libdvdread 0.9.4:
----------------
bswap.h
dvd_input.c
dvd_input.h
dvd_reader.c
dvd_reader.h
dvd_udf.c
dvd_udf.h
ifo_print.c
ifo_print.h
ifo_read.c
ifo_read.h
ifo_types.h
nav_print.c
nav_print.h
nav_read.c
nav_read.h
nav_types.h

libdvdcss 1.2.9:
----------------
bsdi_dvd.h
bsdi_ioctl.c
common.h
config.h
css.c
css.h
csstables.h
device.c
device.h
dvdcss.h
error.c
ioctl.c
ioctl.h
libdvdcss.c
libdvdcss.h

Additional MPlayer-specific changes are contained in libdvdread_changes.diff
and libdvdcss_changes.diff.
This file should be updated with each modification of the code.