<s>
xine	B-Application
is	O
a	O
multimedia	O
playback	O
engine	O
for	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
xine	B-Application
is	O
built	O
around	O
a	O
shared	O
library	O
(	O
xine-lib	B-Application
)	O
that	O
supports	O
different	O
frontend	B-Architecture
player	O
applications	O
.	O
</s>
<s>
xine	B-Application
uses	O
libraries	O
from	O
other	O
projects	O
such	O
as	O
liba52	B-Application
,	O
libmpeg2	B-Library
,	O
FFmpeg	B-Library
,	O
libmad	B-Algorithm
,	O
FAAD2	B-Operating_System
,	O
and	O
Ogle	B-Application
.	O
</s>
<s>
xine	B-Application
can	O
also	O
use	O
binary	O
Windows	O
codecs	O
through	O
a	O
wrapper	O
,	O
bundled	O
as	O
the	O
w32codecs	O
,	O
for	O
playback	O
of	O
some	O
media	O
formats	O
that	O
are	O
not	O
handled	O
natively	O
.	O
</s>
<s>
xine	B-Application
was	O
started	O
in	O
2000	O
by	O
Günter	O
Bartsch	O
shortly	O
after	O
LinuxTag	O
.	O
</s>
<s>
At	O
that	O
time	O
playing	O
DVDs	O
in	O
Linux	B-Application
was	O
described	O
as	O
a	O
tortuous	O
process	O
since	O
one	O
had	O
to	O
manually	O
create	O
audio	O
and	O
video	O
named	B-Operating_System
pipes	I-Operating_System
and	O
start	O
their	O
separated	O
decoder	O
processes	O
.	O
</s>
<s>
Günter	O
realized	O
the	O
OMS	O
(	O
Open	O
Media	O
System	O
)	O
or	O
LiViD	B-Operating_System
approach	O
had	O
obvious	O
shortcomings	O
in	O
terms	O
of	O
audio	O
and	O
video	O
synchronization	O
,	O
so	O
xine	B-Application
was	O
born	O
as	O
an	O
experiment	O
trying	O
to	O
get	O
it	O
right	O
.	O
</s>
<s>
The	O
project	O
evolved	O
into	O
a	O
modern	O
media	O
player	O
multi-threaded	B-Operating_System
architecture	O
.	O
</s>
<s>
During	O
xine	B-Application
development	O
,	O
some	O
effort	O
was	O
dedicated	O
to	O
making	O
a	O
clear	O
separation	O
of	O
the	O
player	O
engine	O
(	O
xine-lib	B-Application
)	O
and	O
front-end	B-Architecture
(	O
xine-ui	B-Application
)	O
.	O
</s>
<s>
Since	O
the	O
1.0	O
release	O
(	O
2004-12-25	O
)	O
the	O
API	O
of	O
xine-lib	B-Application
is	O
considered	O
stable	O
and	O
several	O
applications	O
and	O
players	O
rely	O
on	O
it	O
.	O
</s>
<s>
Since	O
it	O
is	O
not	O
a	O
member	O
of	O
DVD	O
Forum	O
,	O
the	O
xine	B-Application
project	O
is	O
not	O
contractually	O
obliged	O
to	O
insert	O
user	O
operation	O
prohibition	O
such	O
as	O
disallowing	O
fast-forward	O
or	O
skipping	O
during	O
trailers	O
and	O
ads	O
.	O
</s>
<s>
However	O
,	O
without	O
membership	O
in	O
the	O
Forum	O
,	O
the	O
project	O
also	O
cannot	O
make	O
xine	B-Application
play	O
DVDs	O
encrypted	O
with	O
CSS	B-Algorithm
except	O
by	O
using	O
reverse-engineered	O
code	O
.	O
</s>
<s>
xine	B-Application
therefore	O
uses	O
the	O
libdvdcss	B-Language
library	O
,	O
which	O
was	O
created	O
by	O
reverse	O
engineering	O
.	O
</s>
<s>
The	O
legal	O
status	O
of	O
libdvdcss	B-Language
is	O
questionable	O
in	O
several	O
nations	O
;	O
in	O
the	O
United	O
States	O
,	O
for	O
example	O
,	O
the	O
Digital	O
Millennium	O
Copyright	O
Act	O
arguably	O
prohibits	O
reverse-engineering	O
of	O
CSS	B-Algorithm
.	O
</s>
<s>
Virtually	O
all	O
commercial	O
DVDs	O
are	O
encrypted	O
with	O
CSS	B-Algorithm
.	O
</s>
<s>
To	O
prevent	O
a	O
screensaver	O
from	O
starting	O
,	O
xine	B-Application
sends	O
a	O
scroll	B-Device
lock	I-Device
key	I-Device
signal	O
to	O
the	O
environment	O
to	O
pretend	O
keyboard	O
interaction	O
took	O
place	O
.	O
</s>
<s>
This	O
can	O
often	O
lead	O
to	O
issues	O
with	O
other	O
programs	O
running	O
as	O
they	O
receive	O
the	O
scroll	B-Device
lock	I-Device
key	I-Device
as	O
normal	O
input	O
.	O
</s>
<s>
One	O
example	O
is	O
the	O
Konsole	B-Language
terminal	O
emulator	O
,	O
which	O
changes	O
the	O
behaviour	O
of	O
the	O
arrow	O
keys	O
when	O
scroll	B-Device
lock	I-Device
is	O
used	O
.	O
</s>
<s>
The	O
xine	B-Application
project	O
offers	O
graphical	O
front-ends	B-Architecture
for	O
xine	B-Application
,	O
including	O
one	O
based	O
on	O
Xlib	B-Language
and	O
another	O
on	O
GTK+	B-Application
,	O
along	O
with	O
a	O
browser	O
plugin	O
.	O
</s>
<s>
Other	O
front-ends	B-Architecture
for	O
xine	B-Application
are	O
available	O
from	O
other	O
projects	O
.	O
</s>
<s>
The	O
shared	O
library	O
'	O
xine-lib	B-Application
'	O
used	O
and	O
developed	O
by	O
xine	B-Application
is	O
also	O
used	O
by	O
other	O
projects	O
.	O
</s>
<s>
For	O
example	O
,	O
it	O
can	O
be	O
used	O
instead	O
of	O
GStreamer	B-Language
as	O
a	O
backend	B-Architecture
for	O
the	O
Phonon	B-Language
media	O
framework	O
used	O
by	O
KDE	B-Application
and	O
Qt	B-Language
.	O
</s>
