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<h2><span class="refentrytitle"><a name="GstSystemClock.top_of_page"></a>GstSystemClock</span></h2>
<p>GstSystemClock — Default clock that uses the current system time</p>
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<div class="refsect1">
<a name="GstSystemClock.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<col width="150px" class="functions_return">
<col class="functions_name">
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<td class="function_type">
<a class="link" href="GstClock.html" title="GstClock"><span class="returnvalue">GstClock</span></a> *
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<td class="function_name">
<a class="link" href="GstSystemClock.html#gst-system-clock-obtain" title="gst_system_clock_obtain ()">gst_system_clock_obtain</a> <span class="c_punctuation">()</span>
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<td class="function_type">
<span class="returnvalue">void</span>
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<a class="link" href="GstSystemClock.html#gst-system-clock-set-default" title="gst_system_clock_set_default ()">gst_system_clock_set_default</a> <span class="c_punctuation">()</span>
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<a name="GstSystemClock.properties"></a><h2>Properties</h2>
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<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
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<td class="property_type"><a class="link" href="GstSystemClock.html#GstClockType" title="enum GstClockType"><span class="type">GstClockType</span></a></td>
<td class="property_name"><a class="link" href="GstSystemClock.html#GstSystemClock--clock-type" title="The “clock-type” property">clock-type</a></td>
<td class="property_flags">Read / Write</td>
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<div class="refsect1">
<a name="GstSystemClock.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<col width="150px" class="name">
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<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstSystemClock.html#GstClockType" title="enum GstClockType">GstClockType</a></td>
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<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GstSystemClock.html#GstSystemClock-struct" title="struct GstSystemClock">GstSystemClock</a></td>
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<a name="GstSystemClock.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
<span class="lineart">╰──</span> <a class="link" href="GstObject.html" title="GstObject">GstObject</a>
<span class="lineart">╰──</span> <a class="link" href="GstClock.html" title="GstClock">GstClock</a>
<span class="lineart">╰──</span> GstSystemClock
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<div class="refsect1">
<a name="GstSystemClock.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/gst.h&gt;
</pre>
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<div class="refsect1">
<a name="GstSystemClock.description"></a><h2>Description</h2>
<p>The GStreamer core provides a GstSystemClock based on the system time.
Asynchronous callbacks are scheduled from an internal thread.</p>
<p>Clock implementors are encouraged to subclass this systemclock as it
implements the async notification.</p>
<p>Subclasses can however override all of the important methods for sync and
async notifications to implement their own callback methods or blocking
wait operations.</p>
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<div class="refsect1">
<a name="GstSystemClock.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-system-clock-obtain"></a><h3>gst_system_clock_obtain ()</h3>
<pre class="programlisting"><a class="link" href="GstClock.html" title="GstClock"><span class="returnvalue">GstClock</span></a> *
gst_system_clock_obtain (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Get a handle to the default system clock. The refcount of the
clock will be increased so you need to unref the clock after
usage.</p>
<div class="refsect3">
<a name="gst-system-clock-obtain.returns"></a><h4>Returns</h4>
<p> the default clock.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
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<div class="refsect2">
<a name="gst-system-clock-set-default"></a><h3>gst_system_clock_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_system_clock_set_default (<em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> *new_clock</code></em>);</pre>
<p>Sets the default system clock that can be obtained with
<a class="link" href="GstSystemClock.html#gst-system-clock-obtain" title="gst_system_clock_obtain ()"><code class="function">gst_system_clock_obtain()</code></a>.</p>
<p>This is mostly used for testing and debugging purposes when you
want to have control over the time reported by the default system
clock.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-system-clock-set-default.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
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<col width="150px" class="parameters_name">
<col class="parameters_description">
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<td class="parameter_name"><p>new_clock</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a></p></td>
<td class="parameter_annotations"> </td>
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<p class="since">Since: <a class="link" href="ix04.html#api-index-1.4">1.4</a></p>
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<div class="refsect1">
<a name="GstSystemClock.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstClockType"></a><h3>enum GstClockType</h3>
<p>The different kind of clocks.</p>
<div class="refsect3">
<a name="GstClockType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
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<td class="enum_member_name"><p><a name="GST-CLOCK-TYPE-REALTIME:CAPS"></a>GST_CLOCK_TYPE_REALTIME</p></td>
<td class="enum_member_description">
<p>time since Epoch</p>
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<td class="enum_member_annotations"> </td>
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<td class="enum_member_name"><p><a name="GST-CLOCK-TYPE-MONOTONIC:CAPS"></a>GST_CLOCK_TYPE_MONOTONIC</p></td>
<td class="enum_member_description">
<p>monotonic time since some unspecified starting
point</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
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<td class="enum_member_name"><p><a name="GST-CLOCK-TYPE-OTHER:CAPS"></a>GST_CLOCK_TYPE_OTHER</p></td>
<td class="enum_member_description">
<p>some other time source is used (Since 1.0.5)</p>
</td>
<td class="enum_member_annotations"> </td>
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<div class="refsect2">
<a name="GstSystemClock-struct"></a><h3>struct GstSystemClock</h3>
<pre class="programlisting">struct GstSystemClock;</pre>
<p>The default implementation of a <a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> that uses the system time.</p>
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<div class="refsect1">
<a name="GstSystemClock.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstSystemClock--clock-type"></a><h3>The <code class="literal">“clock-type”</code> property</h3>
<pre class="programlisting"> “clock-type” <a class="link" href="GstSystemClock.html#GstClockType" title="enum GstClockType"><span class="type">GstClockType</span></a></pre>
<p>The type of underlying clock implementation used.</p>
<p>Flags: Read / Write</p>
<p>Default value: GST_CLOCK_TYPE_MONOTONIC</p>
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<div class="refsect1">
<a name="GstSystemClock.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a></p>
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