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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>FsConference: Farstream Reference Manual</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
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                  <a href="#FsConference.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces">  <span class="dim">|</span> 
                  <a href="#FsConference.implemented-interfaces" class="shortcut">Implemented Interfaces</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
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<div class="refentry">
<a name="FsConference"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="FsConference.top_of_page"></a>FsConference</span></h2>
<p>FsConference — Interface for farstream conference elements</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="FsConference.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="FsSession.html" title="FsSession"><span class="returnvalue">FsSession</span></a> *
</td>
<td class="function_name">
<a class="link" href="FsConference.html#fs-conference-new-session" title="fs_conference_new_session ()">fs_conference_new_session</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="FsParticipant.html" title="FsParticipant"><span class="returnvalue">FsParticipant</span></a> *
</td>
<td class="function_name">
<a class="link" href="FsConference.html#fs-conference-new-participant" title="fs_conference_new_participant ()">fs_conference_new_participant</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="FsConference.html#FS-ERROR-IS-FATAL:CAPS" title="FS_ERROR_IS_FATAL()">FS_ERROR_IS_FATAL</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="FsConference.html#fs-parse-error" title="fs_parse_error ()">fs_parse_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsConference.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" 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="FsConference.html#FsConference-struct" title="struct FsConference">FsConference</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="FsConference.html#FS-ERROR:CAPS" title="FS_ERROR">FS_ERROR</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="FsConference.html#FsError" title="enum FsError">FsError</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="FsConference.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GInitiallyUnowned
        <span class="lineart">╰──</span> GstObject
            <span class="lineart">╰──</span> GstElement
                <span class="lineart">╰──</span> GstBin
                    <span class="lineart">╰──</span> FsConference
</pre>
</div>
<div class="refsect1">
<a name="FsConference.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
FsConference implements
 GstChildProxy.</p>
</div>
<div class="refsect1">
<a name="FsConference.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;farstream/fs-conference.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="FsConference.description"></a><h2>Description</h2>
<p>A Farstream conference is a conversation space that takes place between 2 or
more participants. Each conference must have one or more Farstream sessions
that are associated to the conference participants.</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-1.2.2.2.8.4"></a><h3>The "<code class="literal">farstream-error</code>" message</h3>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="string">&quot;src-object&quot;</span>       <span class="gtkdoc ppc">#GObject           The object (#FsConference, #FsSession or #FsStream) that emitted the error</span>
<span class="string">&quot;error-no&quot;</span>         <span class="gtkdoc ppc">#FsError           The Error number</span>
<span class="string">&quot;error-msg&quot;</span>        <span class="gtkdoc ppc">#gchar*            The error message</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
The message is sent on asynchronous errors.
</p>
</div>
</div>
<div class="refsect1">
<a name="FsConference.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="fs-conference-new-session"></a><h3>fs_conference_new_session ()</h3>
<pre class="programlisting"><a class="link" href="FsSession.html" title="FsSession"><span class="returnvalue">FsSession</span></a> *
fs_conference_new_session (<em class="parameter"><code><a class="link" href="FsConference.html" title="FsConference"><span class="type">FsConference</span></a> *conference</code></em>,
                           <em class="parameter"><code><a class="link" href="farstream-libs-FsCodec.html#FsMediaType" title="enum FsMediaType"><span class="type">FsMediaType</span></a> media_type</code></em>,
                           <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Create a new Farstream session for the given conference.</p>
<div class="refsect3">
<a name="fs-conference-new-session.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>conference</p></td>
<td class="parameter_description"><p><a class="link" href="FsConference.html" title="FsConference"><span class="type">FsConference</span></a> interface of a <span class="type">GstElement</span></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>media_type</p></td>
<td class="parameter_description"><p><a class="link" href="farstream-libs-FsCodec.html#FsMediaType" title="enum FsMediaType"><span class="type">FsMediaType</span></a> of the new session</p></td>
<td class="parameter_annotations"> </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="fs-conference-new-session.returns"></a><h4>Returns</h4>
<p>the new <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a> that has been created.
The <a class="link" href="FsSession.html" title="FsSession"><span class="type">FsSession</span></a> must be unref'd by the user when closing the session. </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-conference-new-participant"></a><h3>fs_conference_new_participant ()</h3>
<pre class="programlisting"><a class="link" href="FsParticipant.html" title="FsParticipant"><span class="returnvalue">FsParticipant</span></a> *
fs_conference_new_participant (<em class="parameter"><code><a class="link" href="FsConference.html" title="FsConference"><span class="type">FsConference</span></a> *conference</code></em>,
                               <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Create a new Farstream Participant for the type of the given conference.</p>
<div class="refsect3">
<a name="fs-conference-new-participant.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>conference</p></td>
<td class="parameter_description"><p><a class="link" href="FsConference.html" title="FsConference"><span class="type">FsConference</span></a> interface of a <span class="type">GstElement</span></p></td>
<td class="parameter_annotations"> </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="fs-conference-new-participant.returns"></a><h4>Returns</h4>
<p>the new <a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> that has been created.
The <a class="link" href="FsParticipant.html" title="FsParticipant"><span class="type">FsParticipant</span></a> is owned by the user and he must unref it when he is
done with it. </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-ERROR-IS-FATAL:CAPS"></a><h3>FS_ERROR_IS_FATAL()</h3>
<pre class="programlisting">#define             FS_ERROR_IS_FATAL(error)</pre>
<p>Tells the programmer if an error if fatal or not, if it returns <code class="literal">TRUE</code>,
the error is fatal, and the object that created it should
be discarded. It returns <code class="literal">FALSE</code> otherwise.</p>
<div class="refsect3">
<a name="FS-ERROR-IS-FATAL.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>error</p></td>
<td class="parameter_description"><p>a <a class="link" href="FsConference.html#FsError" title="enum FsError"><span class="type">FsError</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="fs-parse-error"></a><h3>fs_parse_error ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
fs_parse_error (<em class="parameter"><code><span class="type">GObject</span> *object</code></em>,
                <em class="parameter"><code><span class="type">GstMessage</span> *message</code></em>,
                <em class="parameter"><code><a class="link" href="FsConference.html#FsError" title="enum FsError"><span class="type">FsError</span></a> *error</code></em>,
                <em class="parameter"><code>const <span class="type">gchar</span> **error_msg</code></em>);</pre>
<p>Parses a "farstream-farstream" message and checks if it matches
the <em class="parameter"><code>object</code></em>
 parameters.</p>
<div class="refsect3">
<a name="fs-parse-error.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" 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>object</p></td>
<td class="parameter_description"><p>a <span class="type">GObject</span> to match against the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <span class="type">GstMessage</span> to parse</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Returns the <a class="link" href="FsConference.html#FsError" title="enum FsError"><span class="type">FsError</span></a> error number in
the message if not <code class="literal">NULL</code>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/out"><span class="acronym">out</span></a>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error_msg</p></td>
<td class="parameter_description"><p>Returns the error message if not <code class="literal">NULL</code>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<a href="http://foldoc.org/out"><span class="acronym">out</span></a>][<a href="http://foldoc.org/transfer%20none"><span class="acronym">transfer none</span></a>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="fs-parse-error.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the message matches the object and is valid.</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="FsConference.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="FsConference-struct"></a><h3>struct FsConference</h3>
<pre class="programlisting">struct FsConference;</pre>
<p>The <a class="link" href="FsConference.html" title="FsConference"><span class="type">FsConference</span></a> structure, all the members are private</p>
</div>
<hr>
<div class="refsect2">
<a name="FS-ERROR:CAPS"></a><h3>FS_ERROR</h3>
<pre class="programlisting">#define FS_ERROR (fs_error_quark ())
</pre>
<p>This quark is used to denote errors coming from Farstream objects</p>
</div>
<hr>
<div class="refsect2">
<a name="FsError"></a><h3>enum FsError</h3>
<p>This is the enum of error numbers that will come either on the "error"
signal, from the Gst Bus or for error in the FS_ERROR domain in GErrors</p>
<div class="refsect3">
<a name="FsError.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">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-CONSTRUCTION:CAPS"></a>FS_ERROR_CONSTRUCTION</p></td>
<td class="enum_member_description">
<p>Error constructing some of the sub-elements, this
probably denotes an error in the installation of the gstreamer elements.
It is a fatal error.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-INTERNAL:CAPS"></a>FS_ERROR_INTERNAL</p></td>
<td class="enum_member_description">
<p>An internal error happened in Farstream, it may be in
an inconsistent state. The object from which this error comes should be
discarded.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-INVALID-ARGUMENTS:CAPS"></a>FS_ERROR_INVALID_ARGUMENTS</p></td>
<td class="enum_member_description">
<p>Invalid arguments to the function, this
is a programming error and should not be reported to the user</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-NETWORK:CAPS"></a>FS_ERROR_NETWORK</p></td>
<td class="enum_member_description">
<p>A network related error, this should probably be
 reported to the user.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-NOT-IMPLEMENTED:CAPS"></a>FS_ERROR_NOT_IMPLEMENTED</p></td>
<td class="enum_member_description">
<p>The optional functionality is not implemented by
this plugin.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-NEGOTIATION-FAILED:CAPS"></a>FS_ERROR_NEGOTIATION_FAILED</p></td>
<td class="enum_member_description">
<p>The codec negotiation has failed, this means
that there are no common codecs between the local and remote codecs.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-UNKNOWN-CODEC:CAPS"></a>FS_ERROR_UNKNOWN_CODEC</p></td>
<td class="enum_member_description">
<p>Data is received on an unknown codec, this most
likely denotes an error on the remote side, the buffers will be ignored.
It can safely be ignored in most cases (but may result in a call with no
media received).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-NO-CODECS:CAPS"></a>FS_ERROR_NO_CODECS</p></td>
<td class="enum_member_description">
<p>There are no codecs detected for that media type.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-NO-CODECS-LEFT:CAPS"></a>FS_ERROR_NO_CODECS_LEFT</p></td>
<td class="enum_member_description">
<p>All of the codecs have been disabled by the
codec preferences, one should try less strict codec preferences.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-CONNECTION-FAILED:CAPS"></a>FS_ERROR_CONNECTION_FAILED</p></td>
<td class="enum_member_description">
<p>Could not connect to the to remote party.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-DISPOSED:CAPS"></a>FS_ERROR_DISPOSED</p></td>
<td class="enum_member_description">
<p>The object has been disposed.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="FS-ERROR-ALREADY-EXISTS:CAPS"></a>FS_ERROR_ALREADY_EXISTS</p></td>
<td class="enum_member_description">
<p>The object already exists</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
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