Beyond Linux® From Scratch - Version 7.7

Chapter 39. Multimedia Libraries and Drivers

Liba52-0.7.4

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-7.7 platform.

Package Information

Optional

djbfft

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/liba52

Installation of Liba52

Install liba52 by running the following commands: 

./configure --prefix=/usr \
            --mandir=/usr/share/man \
            --enable-shared \
            --disable-static \
            CFLAGS="-g -O2 $([ $(uname -m) = x86_64 ] && echo -fPIC)" &&
make

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 \
    /usr/share/doc/liba52-0.7.4/liba52.txt

Command Explanations

CFLAGS="-g -O2 ...: This sets CFLAGS to -g -O2 (which is the default) but then on x86_64 adds -fPIC. This is needed to compile liba52 on x86_64.

--disable-static: This option stops it installing the static version of the library.

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.

Contents

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

Short Descriptions

a52dec

plays ATSC A/52 audio streams.

extract_a52

extracts ATSC A/52 audio from an MPEG stream.

liba52.so

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

Last updated on 2015-02-22 21:16:54 -0800