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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#gstreamer-libs-GstNetTimePacket.synopsis" class="shortcut">Top</a>
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<a href="#gstreamer-libs-GstNetTimePacket.description" class="shortcut">Description</a>
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<a name="gstreamer-libs-GstNetTimePacket"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="gstreamer-libs-GstNetTimePacket.top_of_page"></a>GstNetTimePacket</span></h2>
<p>GstNetTimePacket — Helper structure to construct clock packets used
by network clocks.</p>
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<div class="refsynopsisdiv">
<a name="gstreamer-libs-GstNetTimePacket.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/net/gstnet.h>
struct <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket">GstNetTimePacket</a>;
#define <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GST-NET-TIME-PACKET-SIZE:CAPS" title="GST_NET_TIME_PACKET_SIZE">GST_NET_TIME_PACKET_SIZE</a>
<a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="returnvalue">GstNetTimePacket</span></a> * <a class="link" href="gstreamer-libs-GstNetTimePacket.html#gst-net-time-packet-new" title="gst_net_time_packet_new ()">gst_net_time_packet_new</a> (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> *buffer</code></em>);
<a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="returnvalue">GstNetTimePacket</span></a> * <a class="link" href="gstreamer-libs-GstNetTimePacket.html#gst-net-time-packet-receive" title="gst_net_time_packet_receive ()">gst_net_time_packet_receive</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> fd</code></em>,
<em class="parameter"><code><span class="type">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> *len</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="gstreamer-libs-GstNetTimePacket.html#gst-net-time-packet-send" title="gst_net_time_packet_send ()">gst_net_time_packet_send</a> (<em class="parameter"><code>const <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> *packet</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> fd</code></em>,
<em class="parameter"><code><span class="type">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> len</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="returnvalue">guint8</span></a> * <a class="link" href="gstreamer-libs-GstNetTimePacket.html#gst-net-time-packet-serialize" title="gst_net_time_packet_serialize ()">gst_net_time_packet_serialize</a> (<em class="parameter"><code>const <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> *packet</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gstreamer-libs-GstNetTimePacket.description"></a><h2>Description</h2>
<p>
Various functions for receiving, sending an serializing <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>
structures.
</p>
<p>
Last reviewed on 2005-11-23 (0.9.5)
</p>
</div>
<div class="refsect1">
<a name="gstreamer-libs-GstNetTimePacket.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstNetTimePacket"></a><h3>struct GstNetTimePacket</h3>
<pre class="programlisting">struct GstNetTimePacket {
GstClockTime local_time;
GstClockTime remote_time;
};
</pre>
<p>
Content of a <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>.
</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><a href="../gstreamer-0.11/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstNetTimePacket.local-time"></a>local_time</code></em>;</span></p></td>
<td>the local time when this packet was sent</td>
</tr>
<tr>
<td><p><span class="term"><a href="../gstreamer-0.11/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> <em class="structfield"><code><a name="GstNetTimePacket.remote-time"></a>remote_time</code></em>;</span></p></td>
<td>the remote time observation</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-NET-TIME-PACKET-SIZE:CAPS"></a><h3>GST_NET_TIME_PACKET_SIZE</h3>
<pre class="programlisting">#define GST_NET_TIME_PACKET_SIZE 16
</pre>
<p>
The size of the packets sent between network clocks.
</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-net-time-packet-new"></a><h3>gst_net_time_packet_new ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="returnvalue">GstNetTimePacket</span></a> * gst_net_time_packet_new (<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="type">guint8</span></a> *buffer</code></em>);</pre>
<p>
Creates a new <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> from a buffer received over the network. The
caller is responsible for ensuring that <em class="parameter"><code>buffer</code></em> is at least
<a class="link" href="gstreamer-libs-GstNetTimePacket.html#GST-NET-TIME-PACKET-SIZE:CAPS" title="GST_NET_TIME_PACKET_SIZE"><span class="type">GST_NET_TIME_PACKET_SIZE</span></a> bytes long.
</p>
<p>
If <em class="parameter"><code>buffer</code></em> is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><span class="type">NULL</span></a>, the local and remote times will be set to
<a href="../gstreamer-0.11/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a>.
</p>
<p>
MT safe. Caller owns return value (g_free to free).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>a buffer from which to construct the packet, or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The new <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-net-time-packet-receive"></a><h3>gst_net_time_packet_receive ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="returnvalue">GstNetTimePacket</span></a> * gst_net_time_packet_receive (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> fd</code></em>,
<em class="parameter"><code><span class="type">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> *len</code></em>);</pre>
<p>
Receives a <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> over a socket. Handles interrupted system calls,
but otherwise returns NULL on error. See recvfrom(2) for more information on
how to interpret <em class="parameter"><code>sockaddr</code></em>.
</p>
<p>
MT safe. Caller owns return value (g_free to free).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>fd</code></em> :</span></p></td>
<td>a file descriptor created by socket(2)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>addr</code></em> :</span></p></td>
<td>a pointer to a sockaddr to hold the address of the sender</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>a pointer to the size of the data pointed to by <em class="parameter"><code>addr</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The new <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-net-time-packet-send"></a><h3>gst_net_time_packet_send ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> gst_net_time_packet_send (<em class="parameter"><code>const <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> *packet</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> fd</code></em>,
<em class="parameter"><code><span class="type">struct sockaddr</span> *addr</code></em>,
<em class="parameter"><code><span class="type">socklen_t</span> len</code></em>);</pre>
<p>
Sends a <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> over a socket. Essentially a thin wrapper around
sendto(2) and <a class="link" href="gstreamer-libs-GstNetTimePacket.html#gst-net-time-packet-serialize" title="gst_net_time_packet_serialize ()"><code class="function">gst_net_time_packet_serialize()</code></a>.
</p>
<p>
MT safe.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>packet</code></em> :</span></p></td>
<td>the <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>fd</code></em> :</span></p></td>
<td>a file descriptor created by socket(2)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>addr</code></em> :</span></p></td>
<td>a pointer to a sockaddr to hold the address of the sender</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the size of the data pointed to by <em class="parameter"><code>addr</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The return value of sendto(2).</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-net-time-packet-serialize"></a><h3>gst_net_time_packet_serialize ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint8"><span class="returnvalue">guint8</span></a> * gst_net_time_packet_serialize (<em class="parameter"><code>const <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> *packet</code></em>);</pre>
<p>
Serialized a <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a> into a newly-allocated sequence of
<a class="link" href="gstreamer-libs-GstNetTimePacket.html#GST-NET-TIME-PACKET-SIZE:CAPS" title="GST_NET_TIME_PACKET_SIZE"><span class="type">GST_NET_TIME_PACKET_SIZE</span></a> bytes, in network byte order. The value returned is
suitable for passing to write(2) or sendto(2) for communication over the
network.
</p>
<p>
MT safe. Caller owns return value (g_free to free).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>packet</code></em> :</span></p></td>
<td>the <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GstNetTimePacket" title="struct GstNetTimePacket"><span class="type">GstNetTimePacket</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A newly allocated sequence of <a class="link" href="gstreamer-libs-GstNetTimePacket.html#GST-NET-TIME-PACKET-SIZE:CAPS" title="GST_NET_TIME_PACKET_SIZE"><span class="type">GST_NET_TIME_PACKET_SIZE</span></a> bytes.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="gstreamer-libs-GstNetTimePacket.see-also"></a><h2>See Also</h2>
<a href="../gstreamer-0.11/GstClock.html"><span class="type">GstClock</span></a>, <a class="link" href="GstNetClientClock.html" title="GstNetClientClock"><span class="type">GstNetClientClock</span></a>, <a class="link" href="GstNetTimeProvider.html" title="GstNetTimeProvider"><span class="type">GstNetTimeProvider</span></a>
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