[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[48b7295] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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[06a5391] | 6 |
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[0839092a] | 7 | <!ENTITY liba52-download-http "https://distfiles.adelielinux.org/source/a52dec/a52dec-&liba52-version;.tar.gz">
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[48b7295] | 8 | <!ENTITY liba52-download-ftp " ">
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[0839092a] | 9 | <!ENTITY liba52-md5sum "4debeed0257f5312e84d92711a5cfcec">
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| 10 | <!ENTITY liba52-size "448 KB">
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| 11 | <!ENTITY liba52-buildsize "3.7 MB">
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[64eb1e84] | 12 | <!ENTITY liba52-time "less than 0.1 SBU">
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[48b7295] | 13 | ]>
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| 14 |
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[fd680fb] | 15 | <sect1 id="liba52" xreflabel="liba52-&liba52-version;">
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[65df2435] | 16 | <?dbhtml filename="liba52.html"?>
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| 17 |
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| 18 |
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| 19 | <title>Liba52-&liba52-version;</title>
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| 20 |
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| 21 | <indexterm zone="liba52">
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| 22 | <primary sortas="a-Liba52">Liba52</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to Liba52</title>
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| 27 |
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[2eeb8695] | 28 | <para>
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| 29 | <application>liba52</application> is a free library for decoding
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| 30 | ATSC A/52 (also known as AC-3) streams. The A/52 standard is used
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| 31 | in a variety of applications, including digital television and DVD.
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| 32 | </para>
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[65df2435] | 33 |
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[5efdd78] | 34 | &lfs122_checked;
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[e355f3c6] | 35 |
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[65df2435] | 36 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 37 | <itemizedlist spacing="compact">
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| 38 | <listitem>
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[2eeb8695] | 39 | <para>
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| 40 | Download (HTTP): <ulink url="&liba52-download-http;"/>
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| 41 | </para>
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[65df2435] | 42 | </listitem>
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| 43 | <listitem>
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[2eeb8695] | 44 | <para>
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| 45 | Download (FTP): <ulink url="&liba52-download-ftp;"/>
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| 46 | </para>
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[65df2435] | 47 | </listitem>
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| 48 | <listitem>
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[2eeb8695] | 49 | <para>
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| 50 | Download MD5 sum: &liba52-md5sum;
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| 51 | </para>
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[65df2435] | 52 | </listitem>
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| 53 | <listitem>
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[2eeb8695] | 54 | <para>
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| 55 | Download size: &liba52-size;
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| 56 | </para>
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[65df2435] | 57 | </listitem>
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| 58 | <listitem>
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[2eeb8695] | 59 | <para>
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| 60 | Estimated disk space required: &liba52-buildsize;
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| 61 | </para>
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[65df2435] | 62 | </listitem>
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| 63 | <listitem>
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[2eeb8695] | 64 | <para>
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| 65 | Estimated build time: &liba52-time;
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| 66 | </para>
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[65df2435] | 67 | </listitem>
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| 68 | </itemizedlist>
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| 69 |
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[dc40cb9] | 70 | <bridgehead renderas="sect4">Optional</bridgehead>
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[47274444] | 71 | <para role="optional">
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[75b1a338] | 72 | <ulink url="https://cr.yp.to/djbfft.html">djbfft</ulink>
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[47274444] | 73 | </para>
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[dc40cb9] | 74 |
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[27442a31] | 75 | <para condition="html" role="usernotes">
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| 76 | Editor Notes: <ulink url="&blfs-wiki;/liba52"/>
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| 77 | </para>
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| 78 |
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[65df2435] | 79 | </sect2>
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| 80 |
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| 81 | <sect2 role="installation">
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| 82 | <title>Installation of Liba52</title>
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| 83 |
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[2eeb8695] | 84 | <para>
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| 85 | Install <application>liba52</application> by running the
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| 86 | following commands:
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| 87 | </para>
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[65df2435] | 88 |
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[68dfef54] | 89 | <screen><userinput>./configure --prefix=/usr \
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[62e5e8f] | 90 | --mandir=/usr/share/man \
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[68dfef54] | 91 | --enable-shared \
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| 92 | --disable-static \
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[dcf0bcc2] | 93 | CFLAGS="${CFLAGS:--g -O3} -fPIC" &&
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[65df2435] | 94 | make</userinput></screen>
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| 95 |
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[2eeb8695] | 96 | <para>
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| 97 | To test the results, issue: <command>make check</command>.
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| 98 | </para>
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[4d32631] | 99 |
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[2eeb8695] | 100 | <para>
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| 101 | Now, as the <systemitem class="username">root</systemitem>
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| 102 | user:
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| 103 | </para>
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[65df2435] | 104 |
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| 105 | <screen role="root"><userinput>make install &&
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[dc40cb9] | 106 | cp liba52/a52_internal.h /usr/include/a52dec &&
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[64eb1e84] | 107 | install -v -m644 -D doc/liba52.txt \
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[65df2435] | 108 | /usr/share/doc/liba52-&liba52-version;/liba52.txt</userinput></screen>
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[dc40cb9] | 109 | </sect2>
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| 110 |
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| 111 | <sect2 role="commands">
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| 112 | <title>Command Explanations</title>
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| 113 |
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[2eeb8695] | 114 | <para>
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[dcf0bcc2] | 115 | <parameter>CFLAGS="${CFLAGS:--g -O3} -fPIC"</parameter>: This appends
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| 116 | <option>-fPIC</option> to <envar>CFLAGS</envar> but use
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| 117 | <option>-g -O3</option> (the default of this package) instead of an
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| 118 | empty string when <envar>CFLAGS</envar> is not set.
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| 119 | This is needed to compile <application>liba52</application> without
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| 120 | runtime text relocation. Runtime text relocation is prohibited on
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| 121 | x86_64 so <option>-fPIC</option> is strictly required. On 32-bit x86
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| 122 | runtime text relocation is allowed but it's insecure and it may waste
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| 123 | physical RAM, so <option>-fPIC</option> is still better.
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[2eeb8695] | 124 | </para>
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[65df2435] | 125 |
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[c33c599] | 126 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 127 | href="../../xincludes/static-libraries.xml"/>
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[dc40cb9] | 128 |
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[2eeb8695] | 129 | <para>
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| 130 | <command>cp liba52/a52_internal.h ...</command>: Copying this header
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| 131 | file into /usr/include/a52dec allows some other programs (such as
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| 132 | <application>xine-lib</application>) to compile and link against a system
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| 133 | installed <application>liba52</application>.
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| 134 | </para>
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[65df2435] | 135 | </sect2>
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| 136 |
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| 137 | <sect2 role="content">
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| 138 | <title>Contents</title>
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| 139 |
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| 140 | <segmentedlist>
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| 141 | <segtitle>Installed Programs</segtitle>
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| 142 | <segtitle>Installed Library</segtitle>
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| 143 | <segtitle>Installed Directories</segtitle>
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| 144 |
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| 145 | <seglistitem>
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| 146 | <seg>a52dec and extract_a52</seg>
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[dc40cb9] | 147 | <seg>liba52.so</seg>
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| 148 | <seg>/usr/include/a52dec and
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| 149 | /usr/share/doc/liba52-&liba52-version;</seg>
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[65df2435] | 150 | </seglistitem>
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| 151 | </segmentedlist>
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| 152 |
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| 153 | <variablelist>
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| 154 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 155 | <?dbfo list-presentation="list"?>
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| 156 | <?dbhtml list-presentation="table"?>
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| 157 |
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| 158 | <varlistentry id="a52dec">
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| 159 | <term><command>a52dec</command></term>
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| 160 | <listitem>
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[2eeb8695] | 161 | <para>
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[4c24eb0a] | 162 | plays ATSC A/52 audio streams
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[2eeb8695] | 163 | </para>
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[65df2435] | 164 | <indexterm zone="liba52 a52dec">
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| 165 | <primary sortas="b-a52dec">a52dec</primary>
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| 166 | </indexterm>
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| 167 | </listitem>
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| 168 | </varlistentry>
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| 169 |
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| 170 | <varlistentry id="extract_a52">
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| 171 | <term><command>extract_a52</command></term>
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| 172 | <listitem>
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[2eeb8695] | 173 | <para>
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[4c24eb0a] | 174 | extracts ATSC A/52 audio from an MPEG stream
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[2eeb8695] | 175 | </para>
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[65df2435] | 176 | <indexterm zone="liba52 extract_a52">
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| 177 | <primary sortas="b-extract_a52">extract_a52</primary>
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| 178 | </indexterm>
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| 179 | </listitem>
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| 180 | </varlistentry>
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| 181 |
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| 182 | <varlistentry id="liba52-lib">
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[4c24eb0a] | 183 | <term><filename class="libraryfile">liba52.so</filename></term>
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[65df2435] | 184 | <listitem>
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[2eeb8695] | 185 | <para>
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[4c24eb0a] | 186 | provides functions for the programs dealing with ATSC A/52 streams
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[2eeb8695] | 187 | </para>
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[65df2435] | 188 | <indexterm zone="liba52 liba52-lib">
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[dc40cb9] | 189 | <primary sortas="c-liba52">liba52.so</primary>
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[65df2435] | 190 | </indexterm>
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| 191 | </listitem>
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| 192 | </varlistentry>
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| 193 | </variablelist>
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| 194 | </sect2>
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[4c24eb0a] | 195 |
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[d98b0ca] | 196 | </sect1>
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