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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>GSoundContext: GSound Reference Manual</title>
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><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="#GSoundContext.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#GSoundContext.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces">  <span class="dim">|</span> 
                  <a href="#GSoundContext.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>
<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="GSoundContext"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GSoundContext.top_of_page"></a>GSoundContext</span></h2>
<p>GSoundContext — GSound context object</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GSoundContext.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="define_keyword">#define</td>
<td class="function_name"><a class="link" href="GSoundContext.html#GSOUND-ERROR:CAPS" title="GSOUND_ERROR">GSOUND_ERROR</a></td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-error-quark" title="gsound_error_quark ()">gsound_error_quark</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GSoundContext.html" title="GSoundContext"><span class="returnvalue">GSoundContext</span></a> *
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-new" title="gsound_context_new ()">gsound_context_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-open" title="gsound_context_open ()">gsound_context_open</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-set-attributes" title="gsound_context_set_attributes ()">gsound_context_set_attributes</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-set-attributesv" title="gsound_context_set_attributesv ()">gsound_context_set_attributesv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-set-driver" title="gsound_context_set_driver ()">gsound_context_set_driver</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()">gsound_context_play_simple</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-play-simplev" title="gsound_context_play_simplev ()">gsound_context_play_simplev</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="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()">gsound_context_play_full</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="GSoundContext.html#gsound-context-play-fullv" title="gsound_context_play_fullv ()">gsound_context_play_fullv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-play-full-finish" title="gsound_context_play_full_finish ()">gsound_context_play_full_finish</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-cache" title="gsound_context_cache ()">gsound_context_cache</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GSoundContext.html#gsound-context-cachev" title="gsound_context_cachev ()">gsound_context_cachev</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GSoundContext.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">enum</td>
<td class="function_name"><a class="link" href="GSoundContext.html#GSoundError" title="enum GSoundError">GSoundError</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GSoundContext.html#GSoundContext-struct" title="GSoundContext">GSoundContext</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GSoundContext.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
    <span class="lineart">╰──</span> GSoundContext
</pre>
</div>
<div class="refsect1">
<a name="GSoundContext.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GSoundContext implements
 <a href="https://developer.gnome.org/gio/unstable/GInitable.html">GInitable</a>.</p>
</div>
<div class="refsect1">
<a name="GSoundContext.description"></a><h2>Description</h2>
<p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> is used for playing system sounds. The typical use pattern
is:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>Initialize the <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></li>
<li class="listitem"><p>[Optional] Set any global attributes using <a class="link" href="GSoundContext.html#gsound-context-set-attributes" title="gsound_context_set_attributes ()"><code class="function">gsound_context_set_attributes()</code></a></p></li>
<li class="listitem"><p>[Optional] Cache any frequently-used sounds (for example, sound
effects for a game) using <a class="link" href="GSoundContext.html#gsound-context-cache" title="gsound_context_cache ()"><code class="function">gsound_context_cache()</code></a></p></li>
<li class="listitem"><p>Play sounds using <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a> or <a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a></p></li>
<li class="listitem"><p>Close the connection to the sound server and clean up the context using
<a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a></p></li>
</ul></div>
<p><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> implements the <a href="https://developer.gnome.org/gio/unstable/GInitable.html"><span class="type">GInitable</span></a> interface, so if created with
<a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#g-object-new"><code class="function">g_object_new()</code></a> (as typically happens with language bindings) then you must
call the <a href="https://developer.gnome.org/gio/unstable/GInitable.html#g-initable-init"><code class="function">g_initable_init()</code></a> method before attempting to use it.</p>
<div class="refsect2">
<a name="id-1.2.2.7.5"></a><h3>Simple Examples</h3>
<p>In C:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
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13</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="usertype">GSoundContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">ctx </span><span class="symbol">=</span><span class="normal"> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>
<span class="usertype">GCancellable</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">cancellable </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="https://developer.gnome.org/gio/unstable/GCancellable.html#g-cancellable-new">g_cancellable_new</a></span><span class="symbol">();</span>
<span class="usertype">GError</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">error </span><span class="symbol">=</span><span class="normal"> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>

<span class="normal">ctx </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GSoundContext.html#gsound-context-new">gsound_context_new</a></span><span class="symbol">(</span><span class="normal">cancellable</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">&amp;</span><span class="normal">error</span><span class="symbol">);</span>
<span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error</span><span class="symbol">)</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal">    </span><span class="comment">// handle error</span>
<span class="cbracket">}</span>

<span class="function"><a href="GSoundContext.html#gsound-context-play-simple">gsound_context_play_simple</a></span><span class="symbol">(</span><span class="normal">ctx</span><span class="symbol">,</span><span class="normal"> cancellable</span><span class="symbol">,</span><span class="normal"> </span><span class="symbol">&amp;</span><span class="normal">error</span><span class="symbol">,</span>
<span class="normal">                           <a href="gsound-GSound-Attributes.html#GSOUND-ATTR-EVENT-ID:CAPS">GSOUND_ATTR_EVENT_ID</a></span><span class="symbol">,</span><span class="normal"> </span><span class="string">"phone-incoming-call"</span><span class="symbol">,</span>
<span class="normal">                           </span><span class="comment">// other attributes...</span>
<span class="normal">                           <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p> </p>
<p>or, using Python via GObject Introspection:</p>
<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
4
5
6
7
8
9
10</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="usertype">from</span><span class="normal"> gi</span><span class="symbol">.</span><span class="normal">repository import GSound</span>

<span class="normal">ctx </span><span class="symbol">=</span><span class="normal"> GSound</span><span class="symbol">.</span><span class="function">Context</span><span class="symbol">()</span>

<span class="label">try:</span>
<span class="normal">    ctx</span><span class="symbol">.</span><span class="function">init</span><span class="symbol">();</span>
<span class="normal">    ctx</span><span class="symbol">.</span><span class="function">play_simple</span><span class="symbol">(</span><span class="cbracket">{</span><span class="normal"> GSound</span><span class="symbol">.</span><span class="normal">ATTR_EVENT_ID </span><span class="symbol">:</span><span class="normal"> </span><span class="string">"phone-incoming-call"</span><span class="normal"> </span><span class="cbracket">}</span><span class="symbol">)</span>
<span class="label">except:</span>
<span class="preproc">    # Handle</span><span class="normal"> error</span>
<span class="normal">    pass</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>or using Vala:</p>
<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
4
5
6</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="normal">try </span><span class="cbracket">{</span>
<span class="normal">    </span><span class="usertype">var</span><span class="normal"> ctx </span><span class="symbol">=</span><span class="normal"> </span><span class="usertype">new</span><span class="normal"> GSound</span><span class="symbol">.</span><span class="function">Context</span><span class="symbol">();</span>
<span class="normal">    ctx</span><span class="symbol">.</span><span class="function">play_simple</span><span class="symbol">(</span><span class="normal">null</span><span class="symbol">,</span><span class="normal"> GSound</span><span class="symbol">.</span><span class="normal">Attribute</span><span class="symbol">.</span><span class="normal">EVENT_ID</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"phone-incoming-call"</span><span class="symbol">);</span>
<span class="cbracket">}</span><span class="normal"> </span><span class="keyword">catch</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">Error</span><span class="normal"> e</span><span class="symbol">)</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal">    </span><span class="comment">// handle error</span>
<span class="cbracket">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.7.6"></a><h3>
<code class="literal"><code class="function">play_simple()</code></code> versus <code class="literal"><code class="function">play_full()</code></code>
</h3>
<p>The above examples use the <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a> method for
playing sounds. This is a "fire and forget" method which returns
immediately and does not block your program, and is suitable for most use
cases.</p>
<p>If you need to find out when the sound finished (for example to repeat the
sound) then you can use the <a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a> version. This
is an asynchronous method using the standard GIO async pattern, which will
run the supplied <a href="https://developer.gnome.org/gio/unstable/GAsyncResult.html#GAsyncReadyCallback"><span class="type">GAsyncReadyCallback</span></a> when the sound server has finished.
It is guaranteed that the callback will be run exactly once.</p>
<p>Note that calling <a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a> with a <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> callback is not
equivalent to calling <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a>. When calling 
<code class="function">play_simple()</code>, errors which occur before the sound is passed to the sound
server are reported immediately, whereas with <code class="literal"><code class="function">play_full()</code></code> these are reported
in the callback. If you pass a <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> callback to <a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a>
you will not be able to receive these errors, so it is strongly recommended
to avoid doing this and use <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a> in the case when
you don't need to be notified when the sound has finished.</p>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.2.7.7"></a><h3>Passing Attributes</h3>
<p>GSound supplies information to the sound server by means of attributes.
Attributes can be set on the <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> itself using
<a class="link" href="GSoundContext.html#gsound-context-set-attributes" title="gsound_context_set_attributes ()"><code class="function">gsound_context_set_attributes()</code></a>, or supplied in a <code class="literal"><code class="function">play()</code></code> call. Attributes
set on the context will automatically applied to any subsequent <code class="literal"><code class="function">play()</code></code>
calls, unless overridden by that call.</p>
<p>In C and Vala, attributes are passed as <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of
(attribute, value) pairs. When using GObject introspection, attributes are
typically passed using a language-specific associated array, for example
a dict in Python or an object in JavaScript.</p>
<p>For the list of attributes supported by GSound, see
<a class="link" href="gsound-GSound-Attributes.html" title="GSound Attributes">GSound Attributes</a>.</p>
</div>
<hr>
<div class="refsect2">
<a name="caching"></a><h3>Caching</h3>
<p>If supported by the sound server, frequently-used sounds may be cached. This
may be useful, for example, for sound effects in a game. To cache a sound,
either call <a class="link" href="GSoundContext.html#gsound-context-cache" title="gsound_context_cache ()"><code class="function">gsound_context_cache()</code></a>, or pass the special
<a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-CANBERRA-CACHE-CONTROL:CAPS" title="GSOUND_ATTR_CANBERRA_CACHE_CONTROL"><span class="type">GSOUND_ATTR_CANBERRA_CACHE_CONTROL</span></a> attribute to one of the <code class="literal"><code class="function">play()</code></code>
functions.</p>
<p>For example, in the startup code for a game you might include something
like the following (error checking omitted):</p>
<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
4
5</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="usertype">GSoundContext</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">ctx </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GSoundContext.html#gsound-context-new">gsound_context_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal"><a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span><span class="normal"> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">);</span>
<span class="function"><a href="GSoundContext.html#gsound-context-cache">gsound_context_cache</a></span><span class="symbol">(</span><span class="normal">ctx</span><span class="symbol">,</span><span class="normal"> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">,</span>
<span class="normal">                     <a href="gsound-GSound-Attributes.html#GSOUND-ATTR-MEDIA-FILENAME:CAPS">GSOUND_ATTR_MEDIA_FILENAME</a></span><span class="symbol">,</span>
<span class="normal">                     </span><span class="string">"/path/to/player-spaceship-fire-laser.ogg"</span><span class="symbol">,</span>
<span class="normal">                     <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>There are three caching modes available, "permanent", "volatile" and "never".
The default mode when calling <a class="link" href="GSoundContext.html#gsound-context-cache" title="gsound_context_cache ()"><code class="function">gsound_context_cache()</code></a> is "permanent", and
the default mode for <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a> and <code class="literal"><code class="function">play_full()</code></code> is
"never".</p>
<p>See the documentation for <a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-CANBERRA-CACHE-CONTROL:CAPS" title="GSOUND_ATTR_CANBERRA_CACHE_CONTROL"><span class="type">GSOUND_ATTR_CANBERRA_CACHE_CONTROL</span></a> for more
details.</p>
</div>
</div>
<div class="refsect1">
<a name="GSoundContext.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GSOUND-ERROR:CAPS"></a><h3>GSOUND_ERROR</h3>
<pre class="programlisting">#define GSOUND_ERROR (gsound_error_quark())
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gsound-error-quark"></a><h3>gsound_error_quark ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
gsound_error_quark (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-new"></a><h3>gsound_context_new ()</h3>
<pre class="programlisting"><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="returnvalue">GSoundContext</span></a> *
gsound_context_new (<em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                    <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Creates and initializes a new <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a>. If the an error occured
during initialization, <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><span class="type">NULL</span></a> is returned and <em class="parameter"><code>error</code></em>
 will be set
appropriately.</p>
<div class="refsect3">
<a name="id-1.2.2.8.4.5"></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>cancellable</p></td>
<td class="parameter_description"><p> A <a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a>, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.4.6"></a><h4>Returns</h4>
<p> A new <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-open"></a><h3>gsound_context_open ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_open (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                     <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Attempts to open a connection to the backend sound driver. It is recommended
that you set context attributes with <a class="link" href="GSoundContext.html#gsound-context-set-attributes" title="gsound_context_set_attributes ()"><code class="function">gsound_context_set_attributes()</code></a> before
calling this function.</p>
<div class="blockquote"><blockquote class="blockquote"><p>A connection is automatically opened before playing or caching sounds,
so you rarely need to call this yourself.</p></blockquote></div>
<div class="refsect3">
<a name="id-1.2.2.8.5.6"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.5.7"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the output device was opened successfully, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>
(populating <em class="parameter"><code>error</code></em>
)</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-set-attributes"></a><h3>gsound_context_set_attributes ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_set_attributes (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                               <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>,
                               <em class="parameter"><code>...</code></em>);</pre>
<p>Set attributes or change attributes on <em class="parameter"><code>context</code></em>
. Subsequent calls to this
function calling the same attributes will override the earlier values.</p>
<p>Note that GSound will set the <a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-APPLICATION-NAME:CAPS" title="GSOUND_ATTR_APPLICATION_NAME"><span class="type">GSOUND_ATTR_APPLICATION_NAME</span></a> and
<a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-APPLICATION-ID:CAPS" title="GSOUND_ATTR_APPLICATION_ID"><span class="type">GSOUND_ATTR_APPLICATION_ID</span></a> for you if using <a href="https://developer.gnome.org/gio/unstable/GApplication.html"><span class="type">GApplication</span></a>, so you do
not normally need to set these yourself.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.6.7"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> terminated list of attribute name-value pairs</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.6.8"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if attributes were updated successfully</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-set-attributesv"></a><h3>gsound_context_set_attributesv ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_set_attributesv (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                                <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Hash-Tables.html#GHashTable"><span class="type">GHashTable</span></a> *attrs</code></em>,
                                <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Set attributes or change attributes on <em class="parameter"><code>context</code></em>
. Subsequent calls to this
function calling the same attributes will override the earlier values.</p>
<p>Note that GSound will set the <a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-APPLICATION-NAME:CAPS" title="GSOUND_ATTR_APPLICATION_NAME"><span class="type">GSOUND_ATTR_APPLICATION_NAME</span></a> and
<a class="link" href="gsound-GSound-Attributes.html#GSOUND-ATTR-APPLICATION-ID:CAPS" title="GSOUND_ATTR_APPLICATION_ID"><span class="type">GSOUND_ATTR_APPLICATION_ID</span></a> for you if using <a href="https://developer.gnome.org/gio/unstable/GApplication.html"><span class="type">GApplication</span></a>, so you do
not normally need to set these yourself.</p>
<p>This function is intented to be used by language bindings.</p>
<p><span class="annotation">[<acronym title="Rename the original symbol's name to SYMBOL."><span class="acronym">rename-to</span></acronym> gsound_context_set_attributes]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.7.8"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attrs</p></td>
<td class="parameter_description"><p> Hash table of attributes to set. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8 utf8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.7.9"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if attributes were updated successfully</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-set-driver"></a><h3>gsound_context_set_driver ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_set_driver (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                           <em class="parameter"><code>const <span class="type">char</span> *driver</code></em>,
                           <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Sets the libcanberra driver to <em class="parameter"><code>driver</code></em>
, for example "pulse", "alsa" or "null".
You normally do not need to set this yourself.</p>
<p>Note that this function may return <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> even if the specified driver is
not available: see the libcanberra documentation for details.</p>
<div class="refsect3">
<a name="id-1.2.2.8.8.6"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>driver</p></td>
<td class="parameter_description"><p>libcanberra driver to use</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.8.7"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the libcanberra driver was set successfully</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-play-simple"></a><h3>gsound_context_play_simple ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_play_simple (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                            <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                            <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>,
                            <em class="parameter"><code>...</code></em>);</pre>
<p>The basic "fire-and-forget" play command. This function will not block, and
just sends a request to the sound server before immediately returning.</p>
<p>If you need to know when a sound finishes playing then you should call
<a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a> instead.</p>
<p>You can cancel playback at any time by calling <a href="https://developer.gnome.org/gio/unstable/GCancellable.html#g-cancellable-cancel"><code class="function">g_cancellable_cancel()</code></a> on
<em class="parameter"><code>cancellable</code></em>
, if supplied.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.9.8"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p> A <a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a>, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>A <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of attribute-value pairs</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.9.9"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, populating <em class="parameter"><code>error</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-play-simplev"></a><h3>gsound_context_play_simplev ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_play_simplev (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                             <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Hash-Tables.html#GHashTable"><span class="type">GHashTable</span></a> *attrs</code></em>,
                             <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                             <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>The basic "fire-and-forget" play command. This function will not block, and
just sends a request to the sound server before immediately returning.</p>
<p>If you need to know when a sound finishes playing then you should call
<a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a> instead.</p>
<p>You can cancel playback at any time by calling <a href="https://developer.gnome.org/gio/unstable/GCancellable.html#g-cancellable-cancel"><code class="function">g_cancellable_cancel()</code></a> on
<em class="parameter"><code>cancellable</code></em>
, if supplied.</p>
<p>This function is intented to be used by language bindings.</p>
<p><span class="annotation">[<acronym title="Rename the original symbol's name to SYMBOL."><span class="acronym">rename-to</span></acronym> gsound_context_play_simple]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.10.9"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attrs</p></td>
<td class="parameter_description"><p> Attributes. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8 utf8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p> A <a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.10.10"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success, <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> on error</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-play-full"></a><h3>gsound_context_play_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gsound_context_play_full (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                          <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                          <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GAsyncResult.html#GAsyncReadyCallback"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                          <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                          <em class="parameter"><code>...</code></em>);</pre>
<p>Asynchronously request a sound to be played. When playback is finished
(or if an error occurs) then <em class="parameter"><code>callback</code></em>
 will be called, following the
normal GIO async pattern.</p>
<p>If playback is cancelled via <em class="parameter"><code>cancellable</code></em>
, then <em class="parameter"><code>callback</code></em>
 will be called
with <a href="https://developer.gnome.org/gio/unstable/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><span class="type">G_IO_ERROR_CANCELLED</span></a>.</p>
<p>If you do not need notification of when playback is complete, you should
use <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a>.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.11.8"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p> A <a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a>, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p> callback. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>User data passed to <em class="parameter"><code>callback</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>A <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of attribute-value pairs</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-play-fullv"></a><h3>gsound_context_play_fullv ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gsound_context_play_fullv (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                           <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Hash-Tables.html#GHashTable"><span class="type">GHashTable</span></a> *attrs</code></em>,
                           <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                           <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GAsyncResult.html#GAsyncReadyCallback"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                           <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Asynchronously request a sound to be played. When playback is finished
(or if an error occurs) then <em class="parameter"><code>callback</code></em>
 will be called, following the
normal GIO async pattern.</p>
<p>If playback is cancelled via <em class="parameter"><code>cancellable</code></em>
, then <em class="parameter"><code>callback</code></em>
 will be called
with <a href="https://developer.gnome.org/gio/unstable/gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><span class="type">G_IO_ERROR_CANCELLED</span></a>.</p>
<p>If you do not need notification of when playback is complete, you should
use <a class="link" href="GSoundContext.html#gsound-context-play-simple" title="gsound_context_play_simple ()"><code class="function">gsound_context_play_simple()</code></a>.</p>
<p>This function is intented to be used by language bindings.</p>
<p><span class="annotation">[<acronym title="Rename the original symbol's name to SYMBOL."><span class="acronym">rename-to</span></acronym> gsound_context_play_full]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.12.9"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attrs</p></td>
<td class="parameter_description"><p> Attributes. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8 utf8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p> A <a href="https://developer.gnome.org/gio/unstable/GCancellable.html"><span class="type">GCancellable</span></a>, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p> callback. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-play-full-finish"></a><h3>gsound_context_play_full_finish ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_play_full_finish (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                                 <em class="parameter"><code><a href="https://developer.gnome.org/gio/unstable/GAsyncResult.html"><span class="type">GAsyncResult</span></a> *result</code></em>,
                                 <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Finish an async operation started by <a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a>. You
must call this function in the callback to free memory and receive any
errors which occurred.</p>
<div class="refsect3">
<a name="id-1.2.2.8.13.5"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>result</p></td>
<td class="parameter_description"><p>Result object passed to the callback of
<a class="link" href="GSoundContext.html#gsound-context-play-full" title="gsound_context_play_full ()"><code class="function">gsound_context_play_full()</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.13.6"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if playing finished successfully</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-cache"></a><h3>gsound_context_cache ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_cache (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                      <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>,
                      <em class="parameter"><code>...</code></em>);</pre>
<p>Requests that a sound be cached on the server. See <a class="link" href="GSoundContext.html#caching" title="Caching"><span class="type">caching</span></a>.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.14.6"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>A <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated list of attribute-value pairs</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.2.8.14.7"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gsound-context-cachev"></a><h3>gsound_context_cachev ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gsound_context_cachev (<em class="parameter"><code><a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a> *context</code></em>,
                       <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Hash-Tables.html#GHashTable"><span class="type">GHashTable</span></a> *attrs</code></em>,
                       <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Requests that a sound be cached on the server. See <a class="link" href="GSoundContext.html#caching" title="Caching"><span class="type">caching</span></a>.</p>
<p>This function is intented to be used by language bindings.</p>
<p><span class="annotation">[<acronym title="Rename the original symbol's name to SYMBOL."><span class="acronym">rename-to</span></acronym> gsound_context_cache]</span></p>
<div class="refsect3">
<a name="id-1.2.2.8.15.7"></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>context</p></td>
<td class="parameter_description"><p>A <a class="link" href="GSoundContext.html" title="GSoundContext"><span class="type">GSoundContext</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attrs</p></td>
<td class="parameter_description"><p> Hash table of attrerties. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8 utf8]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Return location for error, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GSoundContext.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GSoundError"></a><h3>enum GSoundError</h3>
<div class="refsect3">
<a name="id-1.2.2.9.2.3"></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="GSOUND-ERROR-NOTSUPPORTED:CAPS"></a>GSOUND_ERROR_NOTSUPPORTED</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-INVALID:CAPS"></a>GSOUND_ERROR_INVALID</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-STATE:CAPS"></a>GSOUND_ERROR_STATE</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-OOM:CAPS"></a>GSOUND_ERROR_OOM</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-NODRIVER:CAPS"></a>GSOUND_ERROR_NODRIVER</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-SYSTEM:CAPS"></a>GSOUND_ERROR_SYSTEM</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-CORRUPT:CAPS"></a>GSOUND_ERROR_CORRUPT</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-TOOBIG:CAPS"></a>GSOUND_ERROR_TOOBIG</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-NOTFOUND:CAPS"></a>GSOUND_ERROR_NOTFOUND</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-DESTROYED:CAPS"></a>GSOUND_ERROR_DESTROYED</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-CANCELED:CAPS"></a>GSOUND_ERROR_CANCELED</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-NOTAVAILABLE:CAPS"></a>GSOUND_ERROR_NOTAVAILABLE</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-ACCESS:CAPS"></a>GSOUND_ERROR_ACCESS</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-IO:CAPS"></a>GSOUND_ERROR_IO</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-INTERNAL:CAPS"></a>GSOUND_ERROR_INTERNAL</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-DISABLED:CAPS"></a>GSOUND_ERROR_DISABLED</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-FORKED:CAPS"></a>GSOUND_ERROR_FORKED</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GSOUND-ERROR-DISCONNECTED:CAPS"></a>GSOUND_ERROR_DISCONNECTED</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GSoundContext-struct"></a><h3>GSoundContext</h3>
<pre class="programlisting">typedef struct _GSoundContext GSoundContext;</pre>
<p>Wrapper for ca_context.</p>
</div>
</div>
<div class="refsect1">
<a name="GSoundContext.see-also"></a><h2>See Also</h2>
<p><a href="http://0pointer.de/lennart/projects/libcanberra/gtkdoc/libcanberra-canberra.html#ca-context"><span class="type">ca_context</span></a></p>
</div>
</div>
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