/usr/share/gtk-doc/html/gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstaudiomixerutils.html is in gstreamer0.10-plugins-base-doc 0.10.36-1.1ubuntu2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GStreamer Base Plugins 0.10 Library Reference Manual: gstaudiomixerutils</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="GStreamer Base Plugins 0.10 Library Reference Manual">
<link rel="up" href="gstreamer-audio.html" title="Audio Library">
<link rel="prev" href="gst-plugins-base-libs-gstaudiofilter.html" title="gstaudiofilter">
<link rel="next" href="gst-plugins-base-libs-gstaudiosink.html" title="gstaudiosink">
<meta name="generator" content="GTK-Doc V1.20 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="10"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#gst-plugins-base-libs-gstaudiomixerutils.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>
<a href="#gst-plugins-base-libs-gstaudiomixerutils.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="gstreamer-audio.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="gst-plugins-base-libs-gstaudiofilter.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="gst-plugins-base-libs-gstaudiosink.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="gst-plugins-base-libs-gstaudiomixerutils"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstaudiomixerutils.top_of_page"></a>gstaudiomixerutils</span></h2>
<p>gstaudiomixerutils — utility functions to find available audio mixers
from the plugin registry</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="gst-plugins-base-libs-gstaudiomixerutils.html#GstAudioMixerFilterFunc" title="GstAudioMixerFilterFunc ()">*GstAudioMixerFilterFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gstaudiomixerutils.html#gst-audio-default-registry-mixer-filter" title="gst_audio_default_registry_mixer_filter ()">gst_audio_default_registry_mixer_filter</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <gst/audio/mixerutils.h>
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.description"></a><h2>Description</h2>
<div class="refsect2">
<a name="id-1.2.5.8.6.2"></a><p>
Provides some utility functions to detect available audio mixers
on the system.
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GstAudioMixerFilterFunc"></a><h3>GstAudioMixerFilterFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstAudioMixerFilterFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> *mixer</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Function that will be called by <a class="link" href="gst-plugins-base-libs-gstaudiomixerutils.html#gst-audio-default-registry-mixer-filter" title="gst_audio_default_registry_mixer_filter ()"><code class="function">gst_audio_default_registry_mixer_filter()</code></a>
so the caller can decide which mixer elements should be kept and returned.
When the mixer element is passed to the callback function, it is opened
and in READY state. If you decide to keep the element, you need to set it
back to NULL state yourself (unless you want to keep it opened of course).</p>
<div class="refsect3">
<a name="id-1.2.5.8.7.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>mixer</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a> implementing the <a class="link" href="gst-plugins-base-libs-gstmixer.html#GstMixer"><span class="type">GstMixer</span></a> interface</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.8.7.2.6"></a><h4>Returns</h4>
<p> TRUE if the element should be kept, FALSE otherwise.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-audio-default-registry-mixer-filter"></a><h3>gst_audio_default_registry_mixer_filter ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
gst_audio_default_registry_mixer_filter
(<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudiomixerutils.html#GstAudioMixerFilterFunc" title="GstAudioMixerFilterFunc ()"><span class="type">GstAudioMixerFilterFunc</span></a> filter_func</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> first</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Utility function to find audio mixer elements.</p>
<p>Will traverse the default plugin registry in order of plugin rank and
find usable audio mixer elements. The caller may optionally fine-tune
the selection by specifying a filter function.</p>
<div class="refsect3">
<a name="id-1.2.5.8.7.3.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>filter_func</p></td>
<td class="parameter_description"><p>filter function, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><span class="type">NULL</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>first</p></td>
<td class="parameter_description"><p>set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if you only want the first suitable mixer element</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data to pass to the filter function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.5.8.7.3.7"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> of audio mixer <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html"><span class="type">GstElement</span></a>s. You must free each
element in the list by setting it to NULL state and calling
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstObject.html#gst-object-unref"><code class="function">gst_object_unref()</code></a>. After that the list itself should be freed
using <a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#g-list-free"><code class="function">g_list_free()</code></a>.</p>
<p></p>
</div>
<p class="since">Since 0.10.2</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstaudiomixerutils.other_details"></a><h2>Types and Values</h2>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.20</div>
</body>
</html>
|