/usr/share/gtk-doc/html/clutter-gst/clutter-gst-Utilities.html is in libclutter-gst-2.0-doc 2.0.8-1build1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Clutter Gst 2.0.8
Reference Manual: Utilities</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="Clutter Gst 2.0.8 Reference Manual">
<link rel="up" href="ch02.html" title="Clutter Actors And Objects">
<link rel="prev" href="ClutterGstVideoSink.html" title="ClutterGstVideoSink">
<link rel="next" href="clutter-gst-Versioning-Macros.html" title="Versioning Macros">
<meta name="generator" content="GTK-Doc V1.19.1 (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">
<a href="#" class="shortcut">Top</a>
|
<a href="#clutter-gst-Utilities.description" class="shortcut">Description</a>
</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="ch02.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="ClutterGstVideoSink.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="clutter-gst-Versioning-Macros.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="clutter-gst-Utilities"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="clutter-gst-Utilities.top_of_page"></a>Utilities</span></h2>
<p>Utilities — Utility functions for Clutter-Gst.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="clutter-gst-Utilities.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"><span class="returnvalue">ClutterInitError</span> <a class="link" href="clutter-gst-Utilities.html#clutter-gst-init" title="clutter_gst_init ()">clutter_gst_init</a> (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
<em class="parameter"><code><span class="type">char</span> ***argv</code></em>);
<span class="returnvalue">ClutterInitError</span> <a class="link" href="clutter-gst-Utilities.html#clutter-gst-init-with-args" title="clutter_gst_init_with_args ()">clutter_gst_init_with_args</a> (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
<em class="parameter"><code><span class="type">char</span> ***argv</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *parameter_string</code></em>,
<em class="parameter"><code><span class="type">GOptionEntry</span> *entries</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *translation_domain</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="clutter-gst-Utilities.description"></a><h2>Description</h2>
<p>
The <span class="application">Clutter-Gst</span> library should be initialized
with <a class="link" href="clutter-gst-Utilities.html#clutter-gst-init" title="clutter_gst_init ()"><code class="function">clutter_gst_init()</code></a> before it can be used. You should pass pointers to
the main argc and argv variables so that GStreamer, Clutter and Clutter-Gst
gst can process their own command line options, as shown in the following
example:
</p>
<p>
</p>
<div class="example">
<a name="id-1.3.5.4.3.1"></a><p class="title"><b>Example 1. Initializing the Clutter-Gst library</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">int</span>
<span class="function">main</span> <span class="gtkdoc opt">(</span><span class="gtkdoc kwb">int</span> argc<span class="gtkdoc opt">,</span> <span class="gtkdoc kwb">char</span> <span class="gtkdoc opt">*</span>argv<span class="gtkdoc opt">[])</span>
<span class="gtkdoc opt">{</span>
<span class="gtkdoc slc">// initialize the Clutter-Gst library</span>
<span class="function"><a href="clutter-gst-Utilities.html#clutter-gst-init">clutter_gst_init</a></span> <span class="gtkdoc opt">(&</span>argc<span class="gtkdoc opt">, &</span>argv<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">...</span>
<span class="gtkdoc opt">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
</p>
<p>
It's allowed to pass two NULL pointers to <a class="link" href="clutter-gst-Utilities.html#clutter-gst-init" title="clutter_gst_init ()"><code class="function">clutter_gst_init()</code></a> in case you
don't want to pass the command line arguments to GStreamer, Clutter and
Clutter-Gst.
</p>
<p>
You can also use a <span class="type">GOptionEntry</span> array to initialize your own parameters
as shown in the next code fragment:
</p>
<p>
</p>
<div class="example">
<a name="id-1.3.5.4.6.1"></a><p class="title"><b>Example 2. Initializing the Clutter-Gst library with additional options</b></p>
<div class="example-contents">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>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</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">static</span> GOptionEntry options<span class="gtkdoc opt">[] =</span>
<span class="gtkdoc opt">{</span>
<span class="gtkdoc opt">{</span> <span class="string">"framerate"</span><span class="gtkdoc opt">,</span> <span class="string">'f'</span><span class="gtkdoc opt">,</span> <span class="number">0</span><span class="gtkdoc opt">,</span> G_OPTION_ARG_INT<span class="gtkdoc opt">, &</span>opt_framerate<span class="gtkdoc opt">,</span>
<span class="string">"Number of frames per second"</span><span class="gtkdoc opt">,</span> NULL <span class="gtkdoc opt">},</span>
<span class="gtkdoc opt">{</span> <span class="string">"fourcc"</span><span class="gtkdoc opt">,</span> <span class="string">'o'</span><span class="gtkdoc opt">,</span> <span class="number">0</span><span class="gtkdoc opt">,</span> G_OPTION_ARG_STRING<span class="gtkdoc opt">,</span>
<span class="gtkdoc opt">&</span>opt_fourcc<span class="gtkdoc opt">,</span> <span class="string">"Fourcc of the wanted YUV format"</span><span class="gtkdoc opt">,</span> NULL <span class="gtkdoc opt">},</span>
<span class="gtkdoc opt">{</span> NULL <span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">};</span>
<span class="gtkdoc kwb">int</span>
<span class="function">main</span> <span class="gtkdoc opt">(</span><span class="gtkdoc kwb">int</span> argc<span class="gtkdoc opt">,</span> <span class="gtkdoc kwb">char</span> <span class="gtkdoc opt">*</span>argv<span class="gtkdoc opt">[])</span>
<span class="gtkdoc opt">{</span>
GError <span class="gtkdoc opt">*</span>error <span class="gtkdoc opt">=</span> NULL<span class="gtkdoc opt">;</span>
gboolean result<span class="gtkdoc opt">;</span>
<span class="keyword">if</span> <span class="gtkdoc opt">(!</span><span class="function">g_thread_supported</span> <span class="gtkdoc opt">())</span>
<span class="function">g_thread_init</span> <span class="gtkdoc opt">(</span>NULL<span class="gtkdoc opt">);</span>
result <span class="gtkdoc opt">=</span> <span class="function"><a href="clutter-gst-Utilities.html#clutter-gst-init-with-args">clutter_gst_init_with_args</a></span> <span class="gtkdoc opt">(&</span>argc<span class="gtkdoc opt">, &</span>argv<span class="gtkdoc opt">,</span>
<span class="string">" - Test YUV frames uploading"</span><span class="gtkdoc opt">,</span>
options<span class="gtkdoc opt">,</span> NULL<span class="gtkdoc opt">, &</span>error<span class="gtkdoc opt">);</span>
<span class="keyword">if</span> <span class="gtkdoc opt">(</span>error<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
<span class="function">g_print</span> <span class="gtkdoc opt">(</span><span class="string">"%s</span><span class="gtkdoc esc">\n</span><span class="string">"</span><span class="gtkdoc opt">,</span> error<span class="gtkdoc opt">-></span>message<span class="gtkdoc opt">);</span>
<span class="function">g_error_free</span> <span class="gtkdoc opt">(</span>error<span class="gtkdoc opt">);</span>
<span class="keyword">return</span> EXIT_FAILURE<span class="gtkdoc opt">;</span>
<span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">...</span>
<span class="gtkdoc opt">}</span></pre></td>
</tr>
</tbody>
</table>
</div>
</div>
<p><br class="example-break">
</p>
</div>
<div class="refsect1">
<a name="clutter-gst-Utilities.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="clutter-gst-init"></a><h3>clutter_gst_init ()</h3>
<pre class="programlisting"><span class="returnvalue">ClutterInitError</span> clutter_gst_init (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
<em class="parameter"><code><span class="type">char</span> ***argv</code></em>);</pre>
<p>
Utility function to initialize both Clutter and GStreamer.
</p>
<p>
This function should be called before calling any other GLib functions. If
this is not an option, your program must initialise the GLib thread system
using <code class="function">g_thread_init()</code> before any other GLib functions are called.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>argc</code></em> :</span></p></td>
<td>The number of arguments in <em class="parameter"><code>argv</code></em>. <span class="annotation">[<a href="http://foldoc.org/inout"><span class="acronym">inout</span></a>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>argv</code></em> :</span></p></td>
<td>A pointer to an array. <span class="annotation">[<a href="http://foldoc.org/array"><span class="acronym">array</span></a> length=argc][<a href="http://foldoc.org/inout"><span class="acronym">inout</span></a>][<a href="http://foldoc.org/allow-none"><span class="acronym">allow-none</span></a>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A <span class="type">ClutterInitError</span>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="clutter-gst-init-with-args"></a><h3>clutter_gst_init_with_args ()</h3>
<pre class="programlisting"><span class="returnvalue">ClutterInitError</span> clutter_gst_init_with_args (<em class="parameter"><code><span class="type">int</span> *argc</code></em>,
<em class="parameter"><code><span class="type">char</span> ***argv</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *parameter_string</code></em>,
<em class="parameter"><code><span class="type">GOptionEntry</span> *entries</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *translation_domain</code></em>,
<em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
This function does the same work as <a class="link" href="clutter-gst-Utilities.html#clutter-gst-init" title="clutter_gst_init ()"><code class="function">clutter_gst_init()</code></a>. Additionally, it
allows you to add your own command line options, and it automatically
generates nicely formatted --help output. Clutter's and GStreamer's
<span class="type">GOptionGroup</span>s are added to the set of available options.
</p>
<p>
Your program must initialise the GLib thread system using <code class="function">g_thread_init()</code>
before any other GLib functions are called.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>argc</code></em> :</span></p></td>
<td>The number of arguments in <em class="parameter"><code>argv</code></em>. <span class="annotation">[<a href="http://foldoc.org/inout"><span class="acronym">inout</span></a>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>argv</code></em> :</span></p></td>
<td>A pointer to an array. <span class="annotation">[<a href="http://foldoc.org/array"><span class="acronym">array</span></a> length=argc][<a href="http://foldoc.org/inout"><span class="acronym">inout</span></a>][<a href="http://foldoc.org/allow-none"><span class="acronym">allow-none</span></a>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parameter_string</code></em> :</span></p></td>
<td>a string which is displayed in
the first line of <code class="option">--help</code> output, after
<code class="literal"><em class="replaceable"><code>programname</code></em> [OPTION...]</code>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>entries</code></em> :</span></p></td>
<td>a <code class="literal">NULL</code>-terminated array of <span class="type">GOptionEntry</span>s
describing the options of your program</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>translation_domain</code></em> :</span></p></td>
<td>a translation domain to use for translating
the <code class="option">--help</code> output for the options in <em class="parameter"><code>entries</code></em>
with <code class="function">gettext()</code>, or <code class="literal">NULL</code>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>a return location for errors</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">CLUTTER_INIT_SUCCESS</code> on success, a negative integer
on failure.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.19.1</div>
</body>
</html>
|