source: multimedia/libdriv/liba52.xml@ d881507

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY liba52-download-http
  "http://liba52.sourceforge.net/files/a52dec-&liba52-version;.tar.gz">
  <!ENTITY liba52-download-ftp  " ">
  <!ENTITY liba52-md5sum        "caa9f5bc44232dc8aeea773fea56be80">
  <!ENTITY liba52-size          "236 KB">
  <!ENTITY liba52-buildsize     "2.5 MB">
  <!ENTITY liba52-time          "less than 0.1 SBU">
]>

<sect1 id="liba52" xreflabel="liba52-&liba52-version;">
  <?dbhtml filename="liba52.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>Liba52-&liba52-version;</title>

  <indexterm zone="liba52">
    <primary sortas="a-Liba52">Liba52</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Liba52</title>

    <para><application>liba52</application> 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.</para>

    &lfs73_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&liba52-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&liba52-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &liba52-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &liba52-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &liba52-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &liba52-time;</para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional"><ulink
    url="http://cr.yp.to/djbfft.html">djbfft</ulink></para>

    <para condition="html" role="usernotes">User Notes:
    <ulink url="&blfs-wiki;/liba52"/></para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of Liba52</title>

    <para>Install <application>liba52</application> by running the
    following commands:</para>

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

    <para>To test the results, issue: <command>make check</command>.</para>

    <para>Now, as the <systemitem class="username">root</systemitem>
    user:</para>

<screen role="root"><userinput>make install &amp;&amp;
cp liba52/a52_internal.h /usr/include/a52dec &amp;&amp;
install -v -m644 -D doc/liba52.txt \
    /usr/share/doc/liba52-&liba52-version;/liba52.txt</userinput></screen>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

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

    <para><option>--disable-static</option>: This option stops it installing
    the static version of the library.</para>

    <para><command>cp liba52/a52_internal.h ...</command>: Copying this header
    file into /usr/include/a52dec allows some other programs (such as
    <application>xine-lib</application>) to compile and link against a system
    installed <application>liba52</application>.</para>
  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>a52dec and extract_a52</seg>
        <seg>liba52.so</seg>
        <seg>/usr/include/a52dec and
        /usr/share/doc/liba52-&liba52-version;</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="a52dec">
        <term><command>a52dec</command></term>
        <listitem>
          <para>plays ATSC A/52 audio streams.</para>
          <indexterm zone="liba52 a52dec">
            <primary sortas="b-a52dec">a52dec</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="extract_a52">
        <term><command>extract_a52</command></term>
        <listitem>
          <para>extracts ATSC A/52 audio from an MPEG stream.</para>
          <indexterm zone="liba52 extract_a52">
            <primary sortas="b-extract_a52">extract_a52</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="liba52-lib">
        <term><filename class='libraryfile'>liba52.so</filename></term>
        <listitem>
          <para>provides functions for the programs dealing with
          ATSC A/52 streams.</para>
          <indexterm zone="liba52 liba52-lib">
            <primary sortas="c-liba52">liba52.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>
</sect1>