Introduction to Liba52

liba52 is a free library for decoding ATSC A/52 (also known as AC-3) streams. The A/52 standard is used in a variety of applications, including digital television and DVD.

This package is known to build and work properly using an LFS 12.1 platform.

Package Information



Editor Notes:

Installation of Liba52

Install liba52 by running the following commands:

./configure --prefix=/usr           \
            --mandir=/usr/share/man \
            --enable-shared         \
            --disable-static        \
            CFLAGS="${CFLAGS:--g -O3} -fPIC" &&

To test the results, issue: make check.

Now, as the root user:

make install &&
cp liba52/a52_internal.h /usr/include/a52dec &&
install -v -m644 -D doc/liba52.txt \

Command Explanations

CFLAGS="${CFLAGS:--g -O3} -fPIC": This appends -fPIC to CFLAGS but use -g -O3 (the default of this package) instead of an empty string when CFLAGS is not set. This is needed to compile liba52 without runtime text relocation. Runtime text relocation is prohibited on x86_64 so -fPIC is strictly required. On 32-bit x86 runtime text relocation is allowed but it's insecure and it may waste physical RAM, so -fPIC is still better.

--disable-static: This switch prevents installation of static versions of the libraries.

cp liba52/a52_internal.h ...: Copying this header file into /usr/include/a52dec allows some other programs (such as xine-lib) to compile and link against a system installed liba52.


Installed Programs: a52dec and extract_a52
Installed Library:
Installed Directories: /usr/include/a52dec and /usr/share/doc/liba52-0.7.4

Short Descriptions


plays ATSC A/52 audio streams


extracts ATSC A/52 audio from an MPEG stream

provides functions for the programs dealing with ATSC A/52 streams