1 | <?xml version="1.0" encoding="UTF-8"?>
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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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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 |
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7 | <!ENTITY alsa-lib-download-http "&alsa-download-http;/lib/alsa-lib-&alsa-lib-version;.tar.bz2">
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8 | <!ENTITY alsa-lib-download-ftp " ">
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9 | <!ENTITY alsa-lib-md5sum "97bbf3cca911c1701fe9fe115c32b03d">
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10 | <!ENTITY alsa-lib-size "1.1 MB">
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11 | <!ENTITY alsa-lib-buildsize "46 MB (with tests and docs)">
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12 | <!ENTITY alsa-lib-time "0.2 SBU (with tests and docs)">
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13 | ]>
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14 |
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15 | <sect1 id="alsa-lib" xreflabel="alsa-lib-&alsa-lib-version;">
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16 | <?dbhtml filename="alsa-lib.html"?>
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17 |
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18 |
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19 | <title>alsa-lib-&alsa-lib-version;</title>
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20 |
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21 | <indexterm zone="alsa-lib">
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22 | <primary sortas="a-alsa-lib">alsa-lib</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 ALSA Library</title>
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27 |
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28 | <para>
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29 | The <application>ALSA Library</application> package contains
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30 | the ALSA library used by programs (including <application>ALSA
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31 | Utilities</application>) requiring access to the ALSA sound
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32 | interface.
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33 | </para>
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34 |
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35 | &lfs122_checked;
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36 |
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37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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38 | <itemizedlist spacing="compact">
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39 | <listitem>
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40 | <para>
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41 | Download (HTTP): <ulink url="&alsa-lib-download-http;"/>
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42 | </para>
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43 | </listitem>
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44 | <listitem>
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45 | <para>
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46 | Download (FTP): <ulink url="&alsa-lib-download-ftp;"/>
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47 | </para>
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48 | </listitem>
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49 | <listitem>
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50 | <para>
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51 | Download MD5 sum: &alsa-lib-md5sum;
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52 | </para>
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53 | </listitem>
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54 | <listitem>
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55 | <para>
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56 | Download size: &alsa-lib-size;
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57 | </para>
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58 | </listitem>
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59 | <listitem>
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60 | <para>
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61 | Estimated disk space required: &alsa-lib-buildsize;
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62 | </para>
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63 | </listitem>
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64 | <listitem>
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65 | <para>
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66 | Estimated build time: &alsa-lib-time;
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67 | </para>
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68 | </listitem>
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69 | </itemizedlist>
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70 |
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71 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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72 | <itemizedlist spacing="compact">
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73 | <listitem>
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74 | <para>
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75 | Recommended file:
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76 | <ulink url="https://www.alsa-project.org/files/pub/lib/alsa-ucm-conf-&alsa-lib-version;.tar.bz2"/>
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77 | </para>
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78 | </listitem>
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79 | </itemizedlist>
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80 |
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81 | <bridgehead renderas="sect3">ALSA Library Dependencies</bridgehead>
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82 |
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83 | <bridgehead renderas="sect4">Recommended (Runtime)</bridgehead>
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84 | <para role="runtime">
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85 | <phrase revision='sysv'><xref linkend='elogind'/></phrase>
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86 | <phrase revision='systemd'><xref linkend='systemd'/></phrase>
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87 | </para>
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88 |
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89 | <note>
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90 | <para>
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91 | If the recommended runtime dependency is not installed, you may
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92 | need to run any application requiring ALSA library as the &root;
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93 | user or a user in the
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94 | <systemitem class='groupname'>audio</systemitem> group.
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95 | </para>
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96 | </note>
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97 |
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98 | <bridgehead renderas="sect4">Optional</bridgehead>
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99 | <para role="optional">
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100 | <xref linkend="doxygen"/> and
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101 | &python2;
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102 | </para>
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103 |
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104 | </sect2>
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105 |
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106 | <sect2 role="kernel" id="alsa-lib-kernel">
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107 | <title>Kernel Configuration</title>
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108 |
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109 | <para>
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110 | If needed, enable the following options in the kernel
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111 | configuration and recompile the kernel:
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112 | </para>
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113 |
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114 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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115 | href="alsa-lib-kernel.xml"/>
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116 |
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117 | <para>
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118 | In the Device Drivers ⇒ Sound card support ⇒ Advanced Linux
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119 | Sound Architecture section of the kernel configuration, select the
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120 | settings and drivers appropriate for your hardware. If necessary,
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121 | recompile and install your new kernel.
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122 | </para>
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123 |
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124 | <indexterm zone="alsa-lib alsa-lib-kernel">
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125 | <primary sortas="d-ALSA">ALSA</primary>
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126 | </indexterm>
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127 |
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128 | </sect2>
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129 |
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130 | <sect2 role="installation">
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131 | <title>Installation of ALSA Library</title>
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132 | <!--
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133 | <para>
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134 | First, if you are building on a 32-bit system, fix a regression that
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135 | causes a segmentation fault when playing audio:
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136 | </para>
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137 |
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138 | <screen><userinput>case $(uname -m) in
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139 | i?86) patch -Np1 -i ../alsa-lib-&alsa-lib-version;-upstream_fixes-1.patch ;;
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140 | esac</userinput></screen>
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141 | -->
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142 | <para>
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143 | Install <application>ALSA Library</application> by
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144 | running the following commands:
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145 | </para>
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146 |
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147 | <screen><userinput>./configure &&
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148 | make</userinput></screen>
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149 |
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150 | <para>
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151 | If you have <application>Doxygen</application> installed and you wish to
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152 | build the library API documentation, run the following
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153 | commands from the top-level directory of the source tree:
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154 | </para>
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155 |
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156 | <screen remap="doc"><userinput>make doc</userinput></screen>
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157 |
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158 | <para>
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159 | To test the results, issue: <command>make check</command>.
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160 | </para>
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161 |
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162 | <para>
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163 | Now, as the &root; user, install the package and recommended configuration files:
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164 | </para>
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165 |
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166 | <screen role="root"><userinput>make install &&
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167 | tar -C /usr/share/alsa --strip-components=1 -xf ../alsa-ucm-conf-&alsa-lib-version;.tar.bz2</userinput></screen>
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168 |
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169 | <para>
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170 | To install the API documentation, run the following command as
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171 | the <systemitem class="username">root</systemitem> user:
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172 | </para>
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173 |
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174 | <screen role="root"
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175 | remap="doc"><userinput>install -v -d -m755 /usr/share/doc/alsa-lib-&alsa-lib-version;/html/search &&
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176 | install -v -m644 doc/doxygen/html/*.* \
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177 | /usr/share/doc/alsa-lib-&alsa-lib-version;/html &&
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178 | install -v -m644 doc/doxygen/html/search/* \
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179 | /usr/share/doc/alsa-lib-&alsa-lib-version;/html/search</userinput></screen>
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180 |
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181 | </sect2>
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182 |
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183 | <sect2 role="configuration">
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184 | <title>Configuring ALSA Library</title>
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185 |
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186 | <sect3 id="alsa-lib-config">
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187 | <title>Config Files</title>
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188 |
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189 | <para>
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190 | <filename>~/.asoundrc</filename> and
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191 | <filename>/etc/asound.conf</filename>
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192 | </para>
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193 |
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194 | <indexterm zone="alsa-lib alsa-lib-config">
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195 | <primary sortas="e-AA.asoundrc">~/.asoundrc</primary>
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196 | </indexterm>
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197 |
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198 | <indexterm zone="alsa-lib alsa-lib-config">
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199 | <primary sortas="e-etc-asound.conf">/etc/asound.conf</primary>
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200 | </indexterm>
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201 |
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202 | </sect3>
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203 |
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204 | <sect3>
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205 | <title>Configuration Information</title>
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206 |
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207 | <para>
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208 | The default <filename>alsa.conf</filename> is adequate for most
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209 | installations. For extra functionality and/or advanced control of your
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210 | sound device, you may need to create additional configuration files.
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211 | For information on the available configuration parameters, visit
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212 | <ulink url="https://www.alsa-project.org/main/index.php/Asoundrc"/>.
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213 | </para>
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214 |
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215 | </sect3>
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216 |
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217 | </sect2>
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218 |
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219 | <sect2 role="content">
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220 | <title>Contents</title>
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221 |
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222 | <segmentedlist>
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223 | <segtitle>Installed Program</segtitle>
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224 | <segtitle>Installed Library</segtitle>
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225 | <segtitle>Installed Directories</segtitle>
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226 |
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227 | <seglistitem>
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228 | <seg>
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229 | aserver
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230 | </seg>
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231 | <seg>
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232 | libasound.so and
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233 | libatopology.so
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234 | </seg>
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235 | <seg>
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236 | /usr/include/alsa,
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237 | /usr/share/alsa and
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238 | /usr/share/doc/alsa-lib-&alsa-lib-version;
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239 | </seg>
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240 | </seglistitem>
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241 | </segmentedlist>
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242 |
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243 | <variablelist>
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244 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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245 | <?dbfo list-presentation="list"?>
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246 | <?dbhtml list-presentation="table"?>
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247 |
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248 | <varlistentry id="aserver">
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249 | <term><command>aserver</command></term>
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250 | <listitem>
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251 | <para>
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252 | is the ALSA server
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253 | </para>
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254 | <indexterm zone="alsa-lib aserver">
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255 | <primary sortas="b-aserver">aserver</primary>
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256 | </indexterm>
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257 | </listitem>
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258 | </varlistentry>
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259 |
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260 | <varlistentry id="libasound">
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261 | <term><filename class="libraryfile">libasound.so</filename></term>
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262 | <listitem>
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263 | <para>
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264 | contains the ALSA API functions
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265 | </para>
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266 | <indexterm zone="alsa-lib libasound">
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267 | <primary sortas="c-libasound">libasound.so</primary>
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268 | </indexterm>
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269 | </listitem>
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270 | </varlistentry>
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271 |
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272 | <varlistentry id="libatopology">
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273 | <term><filename class="libraryfile">libatopology.so</filename></term>
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274 | <listitem>
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275 | <para>
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276 | contains API functions for the ALSA topologies
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277 | </para>
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278 | <indexterm zone="alsa-lib libatopology">
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279 | <primary sortas="c-libatopology">libatopology.so</primary>
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280 | </indexterm>
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281 | </listitem>
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282 | </varlistentry>
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283 |
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284 | </variablelist>
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285 |
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286 | </sect2>
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287 |
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288 | </sect1>
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