<s>
mpg123	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
audio	O
player	O
.	O
</s>
<s>
It	O
supports	O
MPEG	O
audio	O
formats	O
,	O
including	O
MP3	B-Application
.	O
</s>
<s>
As	O
a	O
console	B-Device
application	I-Device
,	O
it	O
has	O
no	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
mpg123	B-Language
's	O
Assembly	B-Language
code	I-Language
is	O
optimized	O
with	O
SIMD	B-Device
instructions	B-General_Concept
to	O
improve	O
the	O
performance	O
of	O
the	O
iDCT	B-General_Concept
part	O
of	O
the	O
MPEG	O
decoding	O
.	O
</s>
<s>
mpg123	B-Language
's	O
decoding	O
library	O
,	O
libmpg123	B-Language
is	O
used	O
by	O
DeaDBeeF	B-Language
,	O
Audacious	B-Language
,	O
XMMS	B-Language
and	O
Winamp	B-Application
(	O
version	O
5.8	O
)	O
for	O
MP3	B-Application
playback	O
and	O
can	O
be	O
used	O
in	O
Winamp	B-Application
before	O
version	O
5.8	O
via	O
a	O
plugin	B-Application
.	O
</s>
<s>
Official	O
development	O
of	O
mpg123	B-Language
and	O
its	O
library	O
mpglib	B-Language
stalled	O
,	O
and	O
serious	O
security	O
holes	O
emerged	O
.	O
</s>
<s>
Patches	O
were	O
applied	O
downstream	O
for	O
packages	O
provided	O
by	O
various	O
Linux	B-Application
and	O
BSD	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
In	O
2006	O
,	O
a	O
new	O
maintainer	O
started	O
work	O
towards	O
the	O
release	O
of	O
a	O
new	O
official	O
mpg123	B-Language
package	O
.	O
</s>
<s>
After	O
several	O
security	O
rollup	O
releases	O
in	O
the	O
0.6.x	O
series	O
,	O
version	O
1.0	O
was	O
released	O
in	O
2007	O
under	O
the	O
LGPLv2.1	B-Application
,	O
with	O
libmpg123	B-Language
as	O
a	O
replacement	O
for	O
mpglib	B-Language
.	O
</s>
