wearable/docs/libs/html/gst-plugins-base-libs-gstaudioclock.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
   2 <html>
   3 <head>
   4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   5 <title>gstaudioclock</title>
   6 <meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
   7 <link rel="home" href="index.html" title="GStreamer Base Plugins 0.10 Library Reference Manual">
   8 <link rel="up" href="gstreamer-audio.html" title="Audio Library">
   9 <link rel="prev" href="gst-plugins-base-libs-gstaudio.html" title="gstaudio">
  10 <link rel="next" href="gst-plugins-base-libs-gstaudiodecoder.html" title="gstaudiodecoder">
  11 <meta name="generator" content="GTK-Doc V1.18 (XML mode)">
  12 <link rel="stylesheet" href="style.css" type="text/css">
  13 </head>
  14 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  15 <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
  16 <tr valign="middle">
  17 <td><a accesskey="p" href="gst-plugins-base-libs-gstaudio.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
  18 <td><a accesskey="u" href="gstreamer-audio.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
  19 <td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
  20 <th width="100%" align="center">GStreamer Base Plugins 0.10 Library Reference Manual</th>
  21 <td><a accesskey="n" href="gst-plugins-base-libs-gstaudiodecoder.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
  22 </tr>
  23 <tr><td colspan="5" class="shortcuts">
  24 <a href="#gst-plugins-base-libs-gstaudioclock.synopsis" class="shortcut">Top</a>
  25                    |
  26                   <a href="#gst-plugins-base-libs-gstaudioclock.description" class="shortcut">Description</a>
  27                    |
  28                   <a href="#gst-plugins-base-libs-gstaudioclock.object-hierarchy" class="shortcut">Object Hierarchy</a>
  29 </td></tr>
  30 </table>
  31 <div class="refentry">
  32 <a name="gst-plugins-base-libs-gstaudioclock"></a><div class="titlepage"></div>
  33 <div class="refnamediv"><table width="100%"><tr>
  34 <td valign="top">
  35 <h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstaudioclock.top_of_page"></a>gstaudioclock</span></h2>
  36 <p>gstaudioclock — Helper object for implementing audio clocks</p>
  37 </td>
  38 <td valign="top" align="right"></td>
  39 </tr></table></div>
  40 <div class="refsynopsisdiv">
  41 <a name="gst-plugins-base-libs-gstaudioclock.synopsis"></a><h2>Synopsis</h2>
  42 <a name="GstAudioClock"></a><pre class="synopsis">
  43 #include &lt;gst/audio/gstaudioclock.h&gt;
  44
  45 struct              <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock-struct" title="struct GstAudioClock">GstAudioClock</a>;
  46 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        (<a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()">*GstAudioClockGetTimeFunc</a>)         (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>,
  47                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
  48 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="returnvalue">GstClock</span></a> *          <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-new" title="gst_audio_clock_new ()">gst_audio_clock_new</a>                 (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
  49                                                          <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> func</code></em>,
  50                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
  51 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="returnvalue">GstClock</span></a> *          <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-new-full" title="gst_audio_clock_new_full ()">gst_audio_clock_new_full</a>            (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
  52                                                          <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> func</code></em>,
  53                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
  54                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);
  55 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-adjust" title="gst_audio_clock_adjust ()">gst_audio_clock_adjust</a>              (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>,
  56                                                          <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>);
  57 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-get-time" title="gst_audio_clock_get_time ()">gst_audio_clock_get_time</a>            (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>);
  58 <span class="returnvalue">void</span>                <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-reset" title="gst_audio_clock_reset ()">gst_audio_clock_reset</a>               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> *clock</code></em>,
  59                                                          <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>);
  60 <span class="returnvalue">void</span>                <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#gst-audio-clock-invalidate" title="gst_audio_clock_invalidate ()">gst_audio_clock_invalidate</a>          (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>);
  61 </pre>
  62 </div>
  63 <div class="refsect1">
  64 <a name="gst-plugins-base-libs-gstaudioclock.object-hierarchy"></a><h2>Object Hierarchy</h2>
  65 <pre class="synopsis">
  66   <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
  67    +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a>
  68          +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html">GstClock</a>
  69                +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSystemClock.html">GstSystemClock</a>
  70                      +----GstAudioClock
  71 </pre>
  72 </div>
  73 <div class="refsect1">
  74 <a name="gst-plugins-base-libs-gstaudioclock.description"></a><h2>Description</h2>
  75 <p>
  76 <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> makes it easy for elements to implement a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a>, they
  77 simply need to provide a function that returns the current clock time.
  78 </p>
  79 <p>
  80 This object is internally used to implement the clock in <a class="link" href="gst-plugins-base-libs-gstbaseaudiosink.html#GstBaseAudioSink"><span class="type">GstBaseAudioSink</span></a>.
  81 </p>
  82 <p>
  83 Last reviewed on 2006-09-27 (0.10.12)
  84 </p>
  85 </div>
  86 <div class="refsect1">
  87 <a name="gst-plugins-base-libs-gstaudioclock.details"></a><h2>Details</h2>
  88 <div class="refsect2">
  89 <a name="GstAudioClock-struct"></a><h3>struct GstAudioClock</h3>
  90 <pre class="programlisting">struct GstAudioClock;</pre>
  91 <p>
  92 Opaque <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>.
  93 </p>
  94 </div>
  95 <hr>
  96 <div class="refsect2">
  97 <a name="GstAudioClockGetTimeFunc"></a><h3>GstAudioClockGetTimeFunc ()</h3>
  98 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        (*GstAudioClockGetTimeFunc)         (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>,
  99                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
 100 <p>
 101 This function will be called whenever the current clock time needs to be
 102 calculated. If this function returns <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a>, the last reported
 103 time will be returned by the clock.
 104 </p>
 105 <div class="variablelist"><table border="0">
 106 <col align="left" valign="top">
 107 <tbody>
 108 <tr>
 109 <td><p><span class="term"><em class="parameter"><code>clock</code></em> :</span></p></td>
 110 <td>the <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>
 111 </td>
 112 </tr>
 113 <tr>
 114 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 115 <td>user data</td>
 116 </tr>
 117 <tr>
 118 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 119 <td>the current time or <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a> if the previous time should
 120 be used.</td>
 121 </tr>
 122 </tbody>
 123 </table></div>
 124 </div>
 125 <hr>
 126 <div class="refsect2">
 127 <a name="gst-audio-clock-new"></a><h3>gst_audio_clock_new ()</h3>
 128 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="returnvalue">GstClock</span></a> *          gst_audio_clock_new                 (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
 129                                                          <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> func</code></em>,
 130                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
 131 <p>
 132 Create a new <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> instance. Whenever the clock time should be
 133 calculated it will call <em class="parameter"><code>func</code></em> with <em class="parameter"><code>user_data</code></em>. When <em class="parameter"><code>func</code></em> returns
 134 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a>, the clock will return the last reported time.
 135 </p>
 136 <div class="variablelist"><table border="0">
 137 <col align="left" valign="top">
 138 <tbody>
 139 <tr>
 140 <td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
 141 <td>the name of the clock</td>
 142 </tr>
 143 <tr>
 144 <td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
 145 <td>a function</td>
 146 </tr>
 147 <tr>
 148 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 149 <td>user data</td>
 150 </tr>
 151 <tr>
 152 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 153 <td>a new <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> casted to a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a>.</td>
 154 </tr>
 155 </tbody>
 156 </table></div>
 157 </div>
 158 <hr>
 159 <div class="refsect2">
 160 <a name="gst-audio-clock-new-full"></a><h3>gst_audio_clock_new_full ()</h3>
 161 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="returnvalue">GstClock</span></a> *          gst_audio_clock_new_full            (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
 162                                                          <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> func</code></em>,
 163                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
 164                                                          <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_notify</code></em>);</pre>
 165 <p>
 166 Create a new <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> instance. Whenever the clock time should be
 167 calculated it will call <em class="parameter"><code>func</code></em> with <em class="parameter"><code>user_data</code></em>. When <em class="parameter"><code>func</code></em> returns
 168 <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a>, the clock will return the last reported time.
 169 </p>
 170 <div class="variablelist"><table border="0">
 171 <col align="left" valign="top">
 172 <tbody>
 173 <tr>
 174 <td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
 175 <td>the name of the clock</td>
 176 </tr>
 177 <tr>
 178 <td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td>
 179 <td>a function</td>
 180 </tr>
 181 <tr>
 182 <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
 183 <td>user data</td>
 184 </tr>
 185 <tr>
 186 <td><p><span class="term"><em class="parameter"><code>destroy_notify</code></em> :</span></p></td>
 187 <td>
 188 <a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> for <em class="parameter"><code>user_data</code></em>
 189 </td>
 190 </tr>
 191 <tr>
 192 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 193 <td>a new <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> casted to a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a>.</td>
 194 </tr>
 195 </tbody>
 196 </table></div>
 197 <p class="since">Since 0.10.31</p>
 198 </div>
 199 <hr>
 200 <div class="refsect2">
 201 <a name="gst-audio-clock-adjust"></a><h3>gst_audio_clock_adjust ()</h3>
 202 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        gst_audio_clock_adjust              (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>,
 203                                                          <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>);</pre>
 204 <p>
 205 Adjust <em class="parameter"><code>time</code></em> with the internal offset of the audio clock.
 206 </p>
 207 <div class="variablelist"><table border="0">
 208 <col align="left" valign="top">
 209 <tbody>
 210 <tr>
 211 <td><p><span class="term"><em class="parameter"><code>clock</code></em> :</span></p></td>
 212 <td>a <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>
 213 </td>
 214 </tr>
 215 <tr>
 216 <td><p><span class="term"><em class="parameter"><code>time</code></em> :</span></p></td>
 217 <td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
 218 </td>
 219 </tr>
 220 <tr>
 221 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 222 <td>
 223 <em class="parameter"><code>time</code></em> adjusted with the internal offset.</td>
 224 </tr>
 225 </tbody>
 226 </table></div>
 227 <p class="since">Since 0.10.23</p>
 228 </div>
 229 <hr>
 230 <div class="refsect2">
 231 <a name="gst-audio-clock-get-time"></a><h3>gst_audio_clock_get_time ()</h3>
 232 <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a>        gst_audio_clock_get_time            (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>);</pre>
 233 <p>
 234 Report the time as returned by the <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> without applying
 235 any offsets.
 236 </p>
 237 <div class="variablelist"><table border="0">
 238 <col align="left" valign="top">
 239 <tbody>
 240 <tr>
 241 <td><p><span class="term"><em class="parameter"><code>clock</code></em> :</span></p></td>
 242 <td>a <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>
 243 </td>
 244 </tr>
 245 <tr>
 246 <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
 247 <td>the time as reported by the time function of the audio clock</td>
 248 </tr>
 249 </tbody>
 250 </table></div>
 251 <p class="since">Since 0.10.23</p>
 252 </div>
 253 <hr>
 254 <div class="refsect2">
 255 <a name="gst-audio-clock-reset"></a><h3>gst_audio_clock_reset ()</h3>
 256 <pre class="programlisting"><span class="returnvalue">void</span>                gst_audio_clock_reset               (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a> *clock</code></em>,
 257                                                          <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>);</pre>
 258 <p>
 259 Inform <em class="parameter"><code>clock</code></em> that future calls to <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> will return values
 260 starting from <em class="parameter"><code>time</code></em>. The clock will update an internal offset to make sure that
 261 future calls to internal_time will return an increasing result as required by
 262 the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> object.
 263 </p>
 264 <div class="variablelist"><table border="0">
 265 <col align="left" valign="top">
 266 <tbody>
 267 <tr>
 268 <td><p><span class="term"><em class="parameter"><code>clock</code></em> :</span></p></td>
 269 <td>a <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>
 270 </td>
 271 </tr>
 272 <tr>
 273 <td><p><span class="term"><em class="parameter"><code>time</code></em> :</span></p></td>
 274 <td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
 275 </td>
 276 </tr>
 277 </tbody>
 278 </table></div>
 279 </div>
 280 <hr>
 281 <div class="refsect2">
 282 <a name="gst-audio-clock-invalidate"></a><h3>gst_audio_clock_invalidate ()</h3>
 283 <pre class="programlisting"><span class="returnvalue">void</span>                gst_audio_clock_invalidate          (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html"><span class="type">GstClock</span></a> *clock</code></em>);</pre>
 284 <p>
 285 Invalidate the clock function. Call this function when the provided
 286 <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClockGetTimeFunc" title="GstAudioClockGetTimeFunc ()"><span class="type">GstAudioClockGetTimeFunc</span></a> cannot be called anymore, for example, when the
 287 user_data becomes invalid.
 288 </p>
 289 <p>
 290 After calling this function, <em class="parameter"><code>clock</code></em> will return the last returned time for
 291 the rest of its lifetime.
 292 </p>
 293 <div class="variablelist"><table border="0">
 294 <col align="left" valign="top">
 295 <tbody><tr>
 296 <td><p><span class="term"><em class="parameter"><code>clock</code></em> :</span></p></td>
 297 <td>a <a class="link" href="gst-plugins-base-libs-gstaudioclock.html#GstAudioClock"><span class="type">GstAudioClock</span></a>
 298 </td>
 299 </tr></tbody>
 300 </table></div>
 301 <p class="since">Since 0.10.31</p>
 302 </div>
 303 </div>
 304 <div class="refsect1">
 305 <a name="gst-plugins-base-libs-gstaudioclock.see-also"></a><h2>See Also</h2>
 306 <a class="link" href="gst-plugins-base-libs-gstbaseaudiosink.html#GstBaseAudioSink"><span class="type">GstBaseAudioSink</span></a>, <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSystemClock.html"><span class="type">GstSystemClock</span></a>
 307 </div>
 308 </div>
 309 <div class="footer">
 310 <hr>
 311           Generated by GTK-Doc V1.18</div>
 312 </body>
 313 </html>