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[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / html / python / lib / module-al.html
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17<title>20.1 al -- Audio functions on the SGI</title>
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55<H1><A NAME="SECTION0022100000000000000000">
5620.1 <tt class="module">al</tt> --
57 Audio functions on the SGI</A>
58</H1>
59
60<P>
61<A NAME="module-al"></A>
62<p class="availability">Availability: <span
63 class="platform">IRIX</span>.</p>
64
65<P>
66This module provides access to the audio facilities of the SGI Indy
67and Indigo workstations. See section 3A of the IRIX man pages for
68details. You'll need to read those man pages to understand what these
69functions do! Some of the functions are not available in IRIX
70releases before 4.0.5. Again, see the manual to check whether a
71specific function is available on your platform.
72
73<P>
74All functions and methods defined in this module are equivalent to
75the C functions with "<tt class="samp">AL</tt>" prefixed to their name.
76
77<P>
78Symbolic constants from the C header file <code>&lt;audio.h&gt;</code> are
79defined in the standard module
80<tt class="module"><a href="module-al-constants.html">AL</a></tt><a id='l2h-5043' xml:id='l2h-5043'></a>, see below.
81
82<P>
83<span class="warning"><b class="label">Warning:</b>
84The current version of the audio library may dump core
85when bad argument values are passed rather than returning an error
86status. Unfortunately, since the precise circumstances under which
87this may happen are undocumented and hard to check, the Python
88interface can provide no protection against this kind of problems.
89(One example is specifying an excessive queue size -- there is no
90documented upper limit.)</span>
91
92<P>
93The module defines the following functions:
94
95<P>
96<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
97 <td><nobr><b><tt id='l2h-5038' xml:id='l2h-5038' class="function">openport</tt></b>(</nobr></td>
98 <td><var>name, direction</var><big>[</big><var>, config</var><big>]</big><var></var>)</td></tr></table></dt>
99<dd>
100The name and direction arguments are strings. The optional
101<var>config</var> argument is a configuration object as returned by
102<tt class="function">newconfig()</tt>. The return value is an <i class="dfn">audio port
103object</i>; methods of audio port objects are described below.
104</dl>
105
106<P>
107<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
108 <td><nobr><b><tt id='l2h-5039' xml:id='l2h-5039' class="function">newconfig</tt></b>(</nobr></td>
109 <td><var></var>)</td></tr></table></dt>
110<dd>
111The return value is a new <i class="dfn">audio configuration object</i>; methods of
112audio configuration objects are described below.
113</dl>
114
115<P>
116<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
117 <td><nobr><b><tt id='l2h-5040' xml:id='l2h-5040' class="function">queryparams</tt></b>(</nobr></td>
118 <td><var>device</var>)</td></tr></table></dt>
119<dd>
120The device argument is an integer. The return value is a list of
121integers containing the data returned by <tt class="cfunction">ALqueryparams()</tt>.
122</dl>
123
124<P>
125<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
126 <td><nobr><b><tt id='l2h-5041' xml:id='l2h-5041' class="function">getparams</tt></b>(</nobr></td>
127 <td><var>device, list</var>)</td></tr></table></dt>
128<dd>
129The <var>device</var> argument is an integer. The list argument is a list
130such as returned by <tt class="function">queryparams()</tt>; it is modified in place
131(!).
132</dl>
133
134<P>
135<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
136 <td><nobr><b><tt id='l2h-5042' xml:id='l2h-5042' class="function">setparams</tt></b>(</nobr></td>
137 <td><var>device, list</var>)</td></tr></table></dt>
138<dd>
139The <var>device</var> argument is an integer. The <var>list</var> argument is a
140list such as returned by <tt class="function">queryparams()</tt>.
141</dl>
142
143<P>
144
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148<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></a>
149
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151<LI><A href="al-config-objects.html">20.1.1 Configuration Objects</a>
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191<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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