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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Farstream Reference Manual: FsStream</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="Farstream Reference Manual">
<link rel="up" href="ch01.html" title="Farstream Core Library">
<link rel="prev" href="FsSession.html" title="FsSession">
<link rel="next" href="farstream-libs-FsCandidate.html" title="FsCandidate">
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<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="#FsStream.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 
                  <a href="#FsStream.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 
                  <a href="#FsStream.properties" class="shortcut">Properties</a></span><span id="nav_signals"> <span class="dim">|</span> 
                  <a href="#FsStream.signals" class="shortcut">Signals</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="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="FsStream"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="FsStream.top_of_page"></a>FsStream</span></h2>
<p>FsStream — A stream in a session in a conference</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="FsStream.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">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-set-transmitter" title="fs_stream_set_transmitter ()">fs_stream_set_transmitter</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-add-remote-candidates" title="fs_stream_add_remote_candidates ()">fs_stream_add_remote_candidates</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-set-remote-codecs" title="fs_stream_set_remote_codecs ()">fs_stream_set_remote_codecs</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-force-remote-candidates" title="fs_stream_force_remote_candidates ()">fs_stream_force_remote_candidates</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-destroy" title="fs_stream_destroy ()">fs_stream_destroy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GstIterator</span> *
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-iterate-src-pads" title="fs_stream_iterate_src_pads ()">fs_stream_iterate_src_pads</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-add-id" title="fs_stream_add_id ()">fs_stream_add_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-emit-error" title="fs_stream_emit_error ()">fs_stream_emit_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="FsStream.html#fs-stream-emit-src-pad-added" title="fs_stream_emit_src_pad_added ()">fs_stream_emit_src_pad_added</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsStream.properties"></a><h2>Properties</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type">
<span class="type">FsCodecGList</span> *</td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--current-recv-codecs" title="The “current-recv-codecs” property">current-recv-codecs</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="FsStream.html#FsStreamDirection" title="enum FsStreamDirection"><span class="type">FsStreamDirection</span></a></td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--direction" title="The “direction” property">direction</a></td>
<td class="property_flags">Read / Write / Construct</td>
</tr>
<tr>
<td class="property_type">
<span class="type">FsCodecGList</span> *</td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--negotiated-codecs" title="The “negotiated-codecs” property">negotiated-codecs</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> *</td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--participant" title="The “participant” property">participant</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type">
<span class="type">FsCodecGList</span> *</td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--remote-codecs" title="The “remote-codecs” property">remote-codecs</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a> *</td>
<td class="property_name"><a class="link" href="FsStream.html#FsStream--session" title="The “session” property">session</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsStream.signals"></a><h2>Signals</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="FsStream.html#FsStream-error" title="The “error” signal">error</a></td>
<td class="signal_flags">Run Last</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="FsStream.html#FsStream-src-pad-added" title="The “src-pad-added” signal">src-pad-added</a></td>
<td class="signal_flags">Run Last</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsStream.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="FsStream.html#FsStream-struct" title="struct FsStream">FsStream</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="FsStream.html#FsStreamClass" title="struct FsStreamClass">FsStreamClass</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="FsStream.html#FsStreamDirection" title="enum FsStreamDirection">FsStreamDirection</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="FsStream.html#FsStreamState" title="enum FsStreamState">FsStreamState</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsStream.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> FsStream
</pre>
</div>
<div class="refsect1">
<a name="FsStream.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;farstream/fs-conference.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="FsStream.description"></a><h2>Description</h2>
<p>This object is the base implementation of a Farstream Stream. It
needs to be derived and implemented by a Farstream conference GStreamer
element. A Farstream Stream is a media stream originating from a
<a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> inside a <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a>. In fact, a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> instance is
obtained by adding a participant into a session using
<a class="link" href="FsSession.html#fs-session-new-stream" title="fs_session_new_stream ()"><code class="function">fs_session_new_stream()</code></a>.</p>
<p>This will communicate asynchronous events to the user through <span class="type">GstMessage</span>
of type <span class="type">GST_MESSAGE_ELEMENT</span> sent over the <span class="type">GstBus</span>.</p>
<div class="refsect2">
<a name="id-1.2.2.5.9.4"></a><h3>The "<code class="literal">farstream-new-local-candidate</code>" message</h3>
<div class="informalexample"><pre class="programlisting">
"stream"           #FsStream          The stream that emits the message
"candidate"        #FsCandidate       The new candidate
</pre></div>
<p>
This message is emitted when a new local candidate is discovered.
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.5.9.5"></a><h3>The "<code class="literal">farstream-local-candidates-prepared</code>" message</h3>
<div class="informalexample"><pre class="programlisting">
"stream"           #FsStream          The stream that emits the message
</pre></div>
<p>
This signal is emitted when all local candidates have been
prepared, an ICE implementation would send its SDP offer or answer.
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.5.9.6"></a><h3>The "<code class="literal">farstream-new-active-candidate-pair</code>" message</h3>
<div class="informalexample"><pre class="programlisting">
"stream"           #FsStream          The stream that emits the message
"local-candidate"  #FsCandidate       Local candidate being used
"remote-candidate" #FsCandidate       Remote candidate being used
</pre></div>
<p>
This message is emitted when there is a new active candidate pair that has
been established. This is specially useful for ICE where the active
candidate pair can change automatically due to network conditions. The user
must not modify the candidates and must copy them if he wants to use them
outside the callback scope. This message is emitted once per component.
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.5.9.7"></a><h3>The "<code class="literal">farstream-recv-codecs-changed</code>" message</h3>
<div class="informalexample"><pre class="programlisting">
"stream"           #FsStream          The stream that emits the message
"codecs"           #FsCodecGList      A #GList of #FsCodec
</pre></div>
<p>
This message is emitted when the content of the
<a class="link" href="FsStream.html#FsStream--current-recv-codecs" title="The “current-recv-codecs” property"><span class="type">“current-recv-codecs”</span></a> property changes. It is normally emitted
right after the <a class="link" href="FsStream.html#FsStream-src-pad-added" title="The “src-pad-added” signal"><span class="type">“src-pad-added”</span></a> signal only if that codec was not
previously received in this stream, but it can also be emitted if the pad
already exists, but the source material that will come to it is different.
The list of new recv-codecs is included in the message
</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.5.9.8"></a><h3>The "<code class="literal">farstream-component-state-changed</code>" message</h3>
<div class="informalexample"><pre class="programlisting">
"stream"           #FsStream          The stream that emits the message
"component"        #guint             The component whose state changed
"state"            #FsStreamState     The new state of the component
</pre></div>
<p>
This message is emitted the state of a component of a stream changes.
</p>
</div>
</div>
<div class="refsect1">
<a name="FsStream.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="fs-stream-set-transmitter"></a><h3>fs_stream_set_transmitter ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
fs_stream_set_transmitter (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                           <em class="parameter"><code>const <span class="type">gchar</span> *transmitter</code></em>,
                           <em class="parameter"><code><span class="type">GParameter</span> *stream_transmitter_parameters</code></em>,
                           <em class="parameter"><code><span class="type">guint</span> stream_transmitter_n_parameters</code></em>,
                           <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Set the transmitter to use for this stream. This function will only succeed
once.</p>
<p>The parameters correspond to the varios GObject properties of the
selected stream transmitter.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.2.6"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>transmitter</p></td>
<td class="parameter_description"><p>Name of the type of transmitter to use for this stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_transmitter_n_parameters</p></td>
<td class="parameter_description"><p>Number of parametrs passed to the stream
transmitter</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_transmitter_parameters</p></td>
<td class="parameter_description"><p>  an array of n_parameters <span class="type">GParameter</span> struct that will be passed
to the newly-create <a class="link" href="FsStreamTransmitter.html" title="FsStreamTransmitter"><span class="type">FsStreamTransmitter</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/array"><span class="acronym">array</span></a> length=stream_transmitter_n_parameters][<a href="http://foldoc.org/allow-none"><span class="acronym">allow-none</span></a>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>location of a <span class="type">GError</span>, or <code class="literal">NULL</code> if no error occured</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.5.10.2.7"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the transmitter could be set, <code class="literal">FALSE</code> otherwise</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-add-remote-candidates"></a><h3>fs_stream_add_remote_candidates ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
fs_stream_add_remote_candidates (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                                 <em class="parameter"><code><span class="type">GList</span> *candidates</code></em>,
                                 <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>This function adds remote candidates. Any new candidates are
added to the list. The candidates will be used to establish a connection
with the peer. A copy will be made so the user must free the
passed candidate using <a class="link" href="farstream-libs-FsCandidate.html#fs-candidate-destroy" title="fs_candidate_destroy ()"><code class="function">fs_candidate_destroy()</code></a> when done.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.3.5"></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>stream</p></td>
<td class="parameter_description"><p>an <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>candidates</p></td>
<td class="parameter_description"><p> an <span class="type">GList</span> of <a class="link" href="farstream-libs-FsCandidate.html#FsCandidate" title="struct FsCandidate"><span class="type">FsCandidate</span></a>
representing the remote candidates. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/element-type"><span class="acronym">element-type</span></a> FsCandidate]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>location of a <span class="type">GError</span>, or <code class="literal">NULL</code> if no error occured</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.5.10.3.6"></a><h4>Returns</h4>
<p> TRUE if the candidate was valid, FALSE otherwise</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-set-remote-codecs"></a><h3>fs_stream_set_remote_codecs ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
fs_stream_set_remote_codecs (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                             <em class="parameter"><code><span class="type">GList</span> *remote_codecs</code></em>,
                             <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>This function will set the list of remote codecs for this stream. If
the given remote codecs couldn't be negotiated with the list of local
codecs or already negotiated codecs for the corresponding <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a>, <em class="parameter"><code>error</code></em>

will be set and <code class="literal">FALSE</code> will be returned. The <em class="parameter"><code>remote_codecs</code></em>
 list will be
copied so it must be free'd using <a class="link" href="farstream-libs-FsCodec.html#fs-codec-list-destroy" title="fs_codec_list_destroy ()"><code class="function">fs_codec_list_destroy()</code></a> when done.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.4.5"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>remote_codecs</p></td>
<td class="parameter_description"><p> a <span class="type">GList</span> of <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> representing
the remote codecs. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/element-type"><span class="acronym">element-type</span></a> FsCodec]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>location of a <span class="type">GError</span>, or <code class="literal">NULL</code> if no error occured</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.5.10.4.6"></a><h4>Returns</h4>
<p> <code class="literal">FALSE</code> if the remote codecs couldn't be set.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-force-remote-candidates"></a><h3>fs_stream_force_remote_candidates ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
fs_stream_force_remote_candidates (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                                   <em class="parameter"><code><span class="type">GList</span> *remote_candidates</code></em>,
                                   <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>This function forces data to be sent immediately to the selected remote
candidate, by-passing any connectivity checks. There should be at most
one candidate per component.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.5.5"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>remote_candidates</p></td>
<td class="parameter_description"><p>  a <span class="type">GList</span> of <a class="link" href="farstream-libs-FsCandidate.html#FsCandidate" title="struct FsCandidate"><span class="type">FsCandidate</span></a> to force. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/element-type"><span class="acronym">element-type</span></a> FsCandidate]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>location of a <span class="type">GError</span>, or <code class="literal">NULL</code> if no error occured</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.5.10.5.6"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the candidates could be forced, <code class="literal">FALSE</code> otherwise</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-destroy"></a><h3>fs_stream_destroy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
fs_stream_destroy (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>);</pre>
<p>This will cause the stream to remove all links to other objects and to
remove itself from the <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a>. Once a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> has been destroyed, it
can not be used anymore.</p>
<p>It is strongly recommended to call this function from the main thread because
releasing the application's reference to a stream.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.6.6"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-iterate-src-pads"></a><h3>fs_stream_iterate_src_pads ()</h3>
<pre class="programlisting"><span class="returnvalue">GstIterator</span> *
fs_stream_iterate_src_pads (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>);</pre>
<p>Creates a <span class="type">GstIterator</span> that can be used to iterate the src pads of this
stream. These are the pads that were announced by <span class="type">“src-pad-added”</span>
and are still valid.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.7.5"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.5.10.7.6"></a><h4>Returns</h4>
<p> The <span class="type">GstIterator</span>. </p>
<p><span class="annotation">[<a href="http://foldoc.org/transfer%20full"><span class="acronym">transfer full</span></a>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-add-id"></a><h3>fs_stream_add_id ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
fs_stream_add_id (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                  <em class="parameter"><code><span class="type">guint</span> id</code></em>);</pre>
<p>This function is used to add data identifiers that allow the
plugin to recognize packets that are meant for id. For example, in RTP,
one would set the SSRCs that are expected.</p>
<p>Depending on the protocol, one may be able to add more than one ID
to a stream (in RTP you can have multiple SSRCs in a stream).
If a protocol supports only one id, adding a new one will overwrite it.
If an ID was already set on a stream, adding it to another stream will
override the previdous decision.</p>
<p>For most protocols, calling this function is optional as the incoming data
can be matched with a stream by its source IP address. This is mostly useful
if one is using multicast or is behind a muxer server.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.8.7"></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>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id</p></td>
<td class="parameter_description"><p>The id to add to the stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-emit-error"></a><h3>fs_stream_emit_error ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
fs_stream_emit_error (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                      <em class="parameter"><code><span class="type">gint</span> error_no</code></em>,
                      <em class="parameter"><code>const <span class="type">gchar</span> *error_msg</code></em>);</pre>
<p>This function emits the <a class="link" href="FsStream.html#FsStream-error" title="The “error” signal"><span class="type">“error”</span></a>" signal, it should only be
called by subclasses.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.9.5"></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>stream</p></td>
<td class="parameter_description"><p><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> on which to emit the error signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error_no</p></td>
<td class="parameter_description"><p>The number of the error</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error_msg</p></td>
<td class="parameter_description"><p>Error message to be displayed to user</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-stream-emit-src-pad-added"></a><h3>fs_stream_emit_src_pad_added ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
fs_stream_emit_src_pad_added (<em class="parameter"><code><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *stream</code></em>,
                              <em class="parameter"><code><span class="type">GstPad</span> *pad</code></em>,
                              <em class="parameter"><code><a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> *codec</code></em>);</pre>
<p>Emits the <a class="link" href="FsStream.html#FsStream-src-pad-added" title="The “src-pad-added” signal"><span class="type">“src-pad-added”</span></a>" signal, it should only be
called by subclasses.</p>
<div class="refsect3">
<a name="id-1.2.2.5.10.10.5"></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>stream</p></td>
<td class="parameter_description"><p><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> on which to emit the src-pad-added signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <span class="type">GstPad</span> that this <a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> has created</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>codec</p></td>
<td class="parameter_description"><p>The <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> for this pad</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="FsStream.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="FsStream-struct"></a><h3>struct FsStream</h3>
<pre class="programlisting">struct FsStream;</pre>
<p>All members are private, access them using methods and properties</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStreamClass"></a><h3>struct FsStreamClass</h3>
<pre class="programlisting">struct FsStreamClass {
  GObjectClass parent_class;

  /*virtual functions */
  gboolean (*add_remote_candidates) (FsStream *stream,
                                     GList *candidates,
                                     GError **error);

  gboolean (*force_remote_candidates) (FsStream *stream,
      GList *remote_candidates,
      GError **error);

  gboolean (*set_remote_codecs) (FsStream *stream,
                                 GList *remote_codecs, GError **error);

  void (*add_id) (FsStream *stream,
                  guint id);

  gboolean (*set_transmitter) (FsStream *stream,
      const gchar *transmitter,
      GParameter *stream_transmitter_parameters,
      guint stream_transmitter_n_parameters,
      GError **error);
};
</pre>
<p>You must override add_remote_candidate in a subclass.
If you have to negotiate codecs, then you must override set_remote_codecs too</p>
<div class="refsect3">
<a name="id-1.2.2.5.11.3.5"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><span class="type">GObjectClass</span> <em class="structfield"><code><a name="FsStreamClass.parent-class"></a>parent_class</code></em>;</p></td>
<td class="struct_member_description"><p>Our parent</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="FsStreamClass.add-remote-candidates"></a>add_remote_candidates</code></em> ()</p></td>
<td class="struct_member_description"><p>Set sthe remote candidates</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="FsStreamClass.force-remote-candidates"></a>force_remote_candidates</code></em> ()</p></td>
<td class="struct_member_description"><p>Forces certain remote candidates</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="FsStreamClass.set-remote-codecs"></a>set_remote_codecs</code></em> ()</p></td>
<td class="struct_member_description"><p>Sets the list of remote codecs</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="FsStreamClass.add-id"></a>add_id</code></em> ()</p></td>
<td class="struct_member_description"><p>Add a known id to be associated with this stream</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="FsStreamClass.set-transmitter"></a>set_transmitter</code></em> ()</p></td>
<td class="struct_member_description"><p>Set the transmitter to use for this stream</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="FsStreamDirection"></a><h3>enum FsStreamDirection</h3>
<p>An enum for specifying the direction of a stream</p>
<div class="refsect3">
<a name="id-1.2.2.5.11.4.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="FS-DIRECTION-NONE:CAPS"></a>FS_DIRECTION_NONE</p></td>
<td class="enum_member_description">
<p>No direction specified</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-DIRECTION-SEND:CAPS"></a>FS_DIRECTION_SEND</p></td>
<td class="enum_member_description">
<p>Send only</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-DIRECTION-RECV:CAPS"></a>FS_DIRECTION_RECV</p></td>
<td class="enum_member_description">
<p>Receive only</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-DIRECTION-BOTH:CAPS"></a>FS_DIRECTION_BOTH</p></td>
<td class="enum_member_description">
<p>Send and receive</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="FsStreamState"></a><h3>enum FsStreamState</h3>
<p>These are the possible states of a stream, a simple multicast stream
could only be in "disconnected" or "ready" state.
An stream using an ICE transmitter would use all of these.</p>
<div class="refsect3">
<a name="id-1.2.2.5.11.5.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-FAILED:CAPS"></a>FS_STREAM_STATE_FAILED</p></td>
<td class="enum_member_description">
<p>connectivity checks have been completed,
                         but connectivity was not established</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-DISCONNECTED:CAPS"></a>FS_STREAM_STATE_DISCONNECTED</p></td>
<td class="enum_member_description">
<p>no activity scheduled</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-GATHERING:CAPS"></a>FS_STREAM_STATE_GATHERING</p></td>
<td class="enum_member_description">
<p>gathering local candidates</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-CONNECTING:CAPS"></a>FS_STREAM_STATE_CONNECTING</p></td>
<td class="enum_member_description">
<p>establishing connectivity</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-CONNECTED:CAPS"></a>FS_STREAM_STATE_CONNECTED</p></td>
<td class="enum_member_description">
<p>at least one working candidate pair</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-STREAM-STATE-READY:CAPS"></a>FS_STREAM_STATE_READY</p></td>
<td class="enum_member_description">
<p>ICE concluded, candidate pair selection is now final</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="FsStream.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="FsStream--current-recv-codecs"></a><h3>The <code class="literal">“current-recv-codecs”</code> property</h3>
<pre class="programlisting">  “current-recv-codecs”      <span class="type">FsCodecGList</span> *</pre>
<p>This is the list of codecs that have been received by this stream.
The user must free the list if <a class="link" href="farstream-libs-FsCodec.html#fs-codec-list-destroy" title="fs_codec_list_destroy ()"><code class="function">fs_codec_list_destroy()</code></a>.
The "farstream-recv-codecs-changed" message is send on the <span class="type">GstBus</span>
when the value of this property changes.
It is normally emitted right after <a class="link" href="FsStream.html#FsStream-src-pad-added" title="The “src-pad-added” signal"><span class="type">“src-pad-added”</span></a>
only if that codec was not previously received in this stream, but it can
also be emitted if the pad already exists, but the source material that
will come to it is different.</p>
<p>Type: GLib.List(FsCodec)
Transfer: full</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream--direction"></a><h3>The <code class="literal">“direction”</code> property</h3>
<pre class="programlisting">  “direction”                <a class="link" href="FsStream.html#FsStreamDirection" title="enum FsStreamDirection"><span class="type">FsStreamDirection</span></a></pre>
<p>The direction of the stream. This property is set initially as a parameter
to the <a class="link" href="FsSession.html#fs-session-new-stream" title="fs_session_new_stream ()"><code class="function">fs_session_new_stream()</code></a> function. It can be changed later if
required by setting this property.</p>
<p>Flags: Read / Write / Construct</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream--negotiated-codecs"></a><h3>The <code class="literal">“negotiated-codecs”</code> property</h3>
<pre class="programlisting">  “negotiated-codecs”        <span class="type">FsCodecGList</span> *</pre>
<p>This is the list of negotiatied codecs, it is the same list as the list
of <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> from the parent <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a>, except that the codec config data
has been replaced with the data from the remote codecs for this stream.
This is the list of <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> used to receive data from this stream.
It is a <span class="type">GList</span> of <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a>.</p>
<p>Type: GLib.List(FsCodec)
Transfer: full</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream--participant"></a><h3>The <code class="literal">“participant”</code> property</h3>
<pre class="programlisting">  “participant”              <a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> *</pre>
<p>The <a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> for this stream. This property is a construct param and
is read-only construction.</p>
<p>Flags: Read / Write / Construct Only</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream--remote-codecs"></a><h3>The <code class="literal">“remote-codecs”</code> property</h3>
<pre class="programlisting">  “remote-codecs”            <span class="type">FsCodecGList</span> *</pre>
<p>This is the list of remote codecs for this stream. They must be set by the
user as soon as they are known using <a class="link" href="FsStream.html#fs-stream-set-remote-codecs" title="fs_stream_set_remote_codecs ()"><code class="function">fs_stream_set_remote_codecs()</code></a>
(generally through external signaling). It is a <span class="type">GList</span> of <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a>.</p>
<p>Type: GLib.List(FsCodec)
Transfer: full</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream--session"></a><h3>The <code class="literal">“session”</code> property</h3>
<pre class="programlisting">  “session”                  <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a> *</pre>
<p>The <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a> for this stream. This property is a construct param and
is read-only construction.</p>
<p>Flags: Read / Write / Construct Only</p>
</div>
</div>
<div class="refsect1">
<a name="FsStream.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="FsStream-error"></a><h3>The <code class="literal">“error”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *self,
               <a class="link" href="FsConference.html#FsError" title="enum FsError"><span class="type">FsError</span></a>   errorno,
               <span class="type">gchar</span>    *error_msg,
               <span class="type">gpointer</span>  user_data)</pre>
<p>This signal is emitted in any error condition</p>
<div class="refsect3">
<a name="id-1.2.2.5.13.2.5"></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>self</p></td>
<td class="parameter_description"><p><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> that emitted the signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>errorno</p></td>
<td class="parameter_description"><p>The number of the error</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error_msg</p></td>
<td class="parameter_description"><p>Error message to be displayed to user</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 set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
<hr>
<div class="refsect2">
<a name="FsStream-src-pad-added"></a><h3>The <code class="literal">“src-pad-added”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> *self,
               <span class="type">GstPad</span>   *pad,
               <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a>  *codec,
               <span class="type">gpointer</span>  user_data)</pre>
<p>This signal is emitted when a new gst source pad has been created for a
specific codec being received. There will be a different source pad for
each codec that is received. The user must ref the <span class="type">GstPad</span> if he wants to
keep it. The user should not modify the <a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> and must copy it if he
wants to use it outside the callback scope.</p>
<p>This signal is not emitted on the main thread, but on GStreamer's streaming
thread!</p>
<div class="refsect3">
<a name="id-1.2.2.5.13.3.6"></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>self</p></td>
<td class="parameter_description"><p><a class="link" href="FsStream.html" title="FsStream"><span class="type">FsStream</span></a> that emitted the signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p><span class="type">GstPad</span> of the new source pad</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>codec</p></td>
<td class="parameter_description"><p><a class="link" href="farstream-libs-FsCodec.html#FsCodec" title="struct FsCodec"><span class="type">FsCodec</span></a> of the codec being received on the new source pad</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 set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
</div>
</div>
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