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<a href="#GstObject.description" class="shortcut">Description</a>
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<h2><span class="refentrytitle"><a name="GstObject.top_of_page"></a>GstObject</span></h2>
<p>GstObject — Base class for the GStreamer object hierarchy</p>
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<a name="GstObject.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/gst.h>
struct <a class="link" href="GstObject.html#GstObject-struct" title="struct GstObject">GstObject</a>;
struct <a class="link" href="GstObject.html#GstObjectClass" title="struct GstObjectClass">GstObjectClass</a>;
enum <a class="link" href="GstObject.html#GstObjectFlags" title="enum GstObjectFlags">GstObjectFlags</a>;
#define <a class="link" href="GstObject.html#GST-OBJECT-FLAGS:CAPS" title="GST_OBJECT_FLAGS()">GST_OBJECT_FLAGS</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-FLAG-IS-SET:CAPS" title="GST_OBJECT_FLAG_IS_SET()">GST_OBJECT_FLAG_IS_SET</a> (obj,
flag)
#define <a class="link" href="GstObject.html#GST-OBJECT-FLAG-SET:CAPS" title="GST_OBJECT_FLAG_SET()">GST_OBJECT_FLAG_SET</a> (obj,
flag)
#define <a class="link" href="GstObject.html#GST-OBJECT-FLAG-UNSET:CAPS" title="GST_OBJECT_FLAG_UNSET()">GST_OBJECT_FLAG_UNSET</a> (obj,
flag)
#define <a class="link" href="GstObject.html#GST-OBJECT-NAME:CAPS" title="GST_OBJECT_NAME()">GST_OBJECT_NAME</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-PARENT:CAPS" title="GST_OBJECT_PARENT()">GST_OBJECT_PARENT</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-REFCOUNT:CAPS" title="GST_OBJECT_REFCOUNT()">GST_OBJECT_REFCOUNT</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-REFCOUNT-VALUE:CAPS" title="GST_OBJECT_REFCOUNT_VALUE()">GST_OBJECT_REFCOUNT_VALUE</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-LOCK:CAPS" title="GST_OBJECT_LOCK()">GST_OBJECT_LOCK</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-TRYLOCK:CAPS" title="GST_OBJECT_TRYLOCK()">GST_OBJECT_TRYLOCK</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-UNLOCK:CAPS" title="GST_OBJECT_UNLOCK()">GST_OBJECT_UNLOCK</a> (obj)
#define <a class="link" href="GstObject.html#GST-OBJECT-GET-LOCK:CAPS" title="GST_OBJECT_GET_LOCK()">GST_OBJECT_GET_LOCK</a> (obj)
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-set-name" title="gst_object_set_name ()">gst_object_set_name</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GstObject.html#gst-object-get-name" title="gst_object_get_name ()">gst_object_get_name</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-set-parent" title="gst_object_set_parent ()">gst_object_set_parent</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);
<a class="link" href="GstObject.html" title="GstObject"><span class="returnvalue">GstObject</span></a> * <a class="link" href="GstObject.html#gst-object-get-parent" title="gst_object_get_parent ()">gst_object_get_parent</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-unparent" title="gst_object_unparent ()">gst_object_unparent</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-default-deep-notify" title="gst_object_default_deep_notify ()">gst_object_default_deep_notify</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *orig</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> *pspec</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **excluded_props</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-default-error" title="gst_object_default_error ()">gst_object_default_error</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *source</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-check-uniqueness" title="gst_object_check_uniqueness ()">gst_object_check_uniqueness</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-has-ancestor" title="gst_object_has_ancestor ()">gst_object_has_ancestor</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *ancestor</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> <a class="link" href="GstObject.html#gst-object-ref" title="gst_object_ref ()">gst_object_ref</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()">gst_object_unref</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> <a class="link" href="GstObject.html#gst-object-ref-sink" title="gst_object_ref_sink ()">gst_object_ref_sink</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-replace" title="gst_object_replace ()">gst_object_replace</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> **oldobj</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *newobj</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GstObject.html#gst-object-get-path-string" title="gst_object_get_path_string ()">gst_object_get_path_string</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="returnvalue">GstClockTime</span></a> <a class="link" href="GstObject.html#gst-object-suggest-next-sync" title="gst_object_suggest_next_sync ()">gst_object_suggest_next_sync</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-sync-values" title="gst_object_sync_values ()">gst_object_sync_values</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-has-active-control-bindings" title="gst_object_has_active_control_bindings ()">gst_object_has_active_control_bindings</a>
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-set-control-bindings-disabled" title="gst_object_set_control_bindings_disabled ()">gst_object_set_control_bindings_disabled</a>
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> disabled</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-set-control-binding-disabled" title="gst_object_set_control_binding_disabled ()">gst_object_set_control_binding_disabled</a>
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> disabled</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-add-control-binding" title="gst_object_add_control_binding ()">gst_object_add_control_binding</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> *binding</code></em>);
<a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="returnvalue">GstControlBinding</span></a> * <a class="link" href="GstObject.html#gst-object-get-control-binding" title="gst_object_get_control_binding ()">gst_object_get_control_binding</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-remove-control-binding" title="gst_object_remove_control_binding ()">gst_object_remove_control_binding</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> *binding</code></em>);
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="returnvalue">GValue</span></a> * <a class="link" href="GstObject.html#gst-object-get-value" title="gst_object_get_value ()">gst_object_get_value</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-get-value-array" title="gst_object_get_value_array ()">gst_object_get_value_array</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> interval</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_values</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> values</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstObject.html#gst-object-get-g-value-array" title="gst_object_get_g_value_array ()">gst_object_get_g_value_array</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> interval</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_values</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *values</code></em>);
<a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="returnvalue">GstClockTime</span></a> <a class="link" href="GstObject.html#gst-object-get-control-rate" title="gst_object_get_control_rate ()">gst_object_get_control_rate</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstObject.html#gst-object-set-control-rate" title="gst_object_set_control_rate ()">gst_object_set_control_rate</a> (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> control_rate</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GstObject.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
+----GstObject
+----<a class="link" href="GstAllocator.html" title="GstAllocator">GstAllocator</a>
+----<a class="link" href="GstPad.html" title="GstPad">GstPad</a>
+----<a class="link" href="GstPadTemplate.html" title="GstPadTemplate">GstPadTemplate</a>
+----<a class="link" href="GstPluginFeature.html" title="GstPluginFeature">GstPluginFeature</a>
+----<a class="link" href="GstElement.html" title="GstElement">GstElement</a>
+----<a class="link" href="GstBus.html" title="GstBus">GstBus</a>
+----<a class="link" href="GstTask.html" title="GstTask">GstTask</a>
+----<a class="link" href="GstTaskPool.html" title="GstTaskPool">GstTaskPool</a>
+----<a class="link" href="GstClock.html" title="GstClock">GstClock</a>
+----<a class="link" href="GstControlBinding.html" title="GstControlBinding">GstControlBinding</a>
+----<a class="link" href="GstControlSource.html" title="GstControlSource">GstControlSource</a>
+----<a class="link" href="GstPlugin.html" title="GstPlugin">GstPlugin</a>
+----<a class="link" href="GstRegistry.html" title="GstRegistry">GstRegistry</a>
</pre>
</div>
<div class="refsect1">
<a name="GstObject.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GstObject.html#GstObject--name" title='The "name" property'>name</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write / Construct
"<a class="link" href="GstObject.html#GstObject--parent" title='The "parent" property'>parent</a>" <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>* : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="GstObject.signals"></a><h2>Signals</h2>
<pre class="synopsis">
"<a class="link" href="GstObject.html#GstObject-deep-notify" title='The "deep-notify" signal'>deep-notify</a>" : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-NO-HOOKS:CAPS"><code class="literal">No Hooks</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GstObject.description"></a><h2>Description</h2>
<p>
<a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> provides a root for the object hierarchy tree filed in by the
GStreamer library. It is currently a thin wrapper on top of
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned"><span class="type">GInitiallyUnowned</span></a>. It is an abstract class that is not very usable on its own.
</p>
<p>
<a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> gives us basic refcounting, parenting functionality and locking.
Most of the function are just extended for special GStreamer needs and can be
found under the same name in the base class of <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> which is <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
(e.g. <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#g-object-ref"><code class="function">g_object_ref()</code></a> becomes <a class="link" href="GstObject.html#gst-object-ref" title="gst_object_ref ()"><code class="function">gst_object_ref()</code></a>).
</p>
<p>
Since <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> dereives from <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned"><span class="type">GInitiallyUnowned</span></a>, it also inherits the
floating reference. Be aware that functions such as <a class="link" href="GstBin.html#gst-bin-add" title="gst_bin_add ()"><code class="function">gst_bin_add()</code></a> and
<a class="link" href="GstElement.html#gst-element-add-pad" title="gst_element_add_pad ()"><code class="function">gst_element_add_pad()</code></a> take ownership of the floating reference.
</p>
<p>
In contrast to <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> instances, <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> adds a name property. The functions
<a class="link" href="GstObject.html#gst-object-set-name" title="gst_object_set_name ()"><code class="function">gst_object_set_name()</code></a> and <a class="link" href="GstObject.html#gst-object-get-name" title="gst_object_get_name ()"><code class="function">gst_object_get_name()</code></a> are used to set/get the name
of the object.
</p>
<p>
</p>
<div class="refsect2">
<a name="id-1.3.32.7.6.1"></a><h3>controlled properties</h3>
<p>
Controlled properties offers a lightweight way to adjust gobject
properties over stream-time. It works by using time-stamped value pairs that
are queued for element-properties. At run-time the elements continuously pull
values changes for the current stream-time.
</p>
<p>
What needs to be changed in a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>?
Very little - it is just two steps to make a plugin controllable!
</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><p>
mark gobject-properties paramspecs that make sense to be controlled,
by GST_PARAM_CONTROLLABLE.
</p></li>
<li class="listitem"><p>
when processing data (get, chain, loop function) at the beginning call
gst_object_sync_values(element,timestamp).
This will made the controller to update all gobject properties that are under
control with the current values based on timestamp.
</p></li>
</ol></div>
<p>
</p>
<p>
What needs to be done in applications?
Again it's not a lot to change.
</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><p>
create a <a class="link" href="GstControlSource.html" title="GstControlSource"><span class="type">GstControlSource</span></a>.
csource = <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstInterpolationControlSource.html#gst-interpolation-control-source-new"><code class="function">gst_interpolation_control_source_new()</code></a>;
g_object_set (csource, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL);
</p></li>
<li class="listitem"><p>
Attach the <a class="link" href="GstControlSource.html" title="GstControlSource"><span class="type">GstControlSource</span></a> on the controller to a property.
gst_object_add_control_binding (object, gst_direct_control_binding_new (object, "prop1", csource));
</p></li>
<li class="listitem"><p>
Set the control values
gst_timed_value_control_source_set ((GstTimedValueControlSource *)csource,0 * GST_SECOND, value1);
gst_timed_value_control_source_set ((GstTimedValueControlSource *)csource,1 * GST_SECOND, value2);
</p></li>
<li class="listitem"><p>
start your pipeline
</p></li>
</ol></div>
<p>
</p>
</div>
<p>
</p>
<p>
Last reviewed on 2012-03-29 (0.11.3)
</p>
</div>
<div class="refsect1">
<a name="GstObject.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstObject-struct"></a><h3>struct GstObject</h3>
<pre class="programlisting">struct GstObject {
GMutex lock; /* object LOCK */
gchar *name; /* object name */
GstObject *parent; /* this object's parent, weak ref */
guint32 flags;
};
</pre>
<p>
GStreamer base object class.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Threads.html#GMutex"><span class="type">GMutex</span></a> <em class="structfield"><code><a name="GstObject-struct.lock"></a>lock</code></em>;</span></p></td>
<td>object LOCK</td>
</tr>
<tr>
<td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GstObject-struct.name"></a>name</code></em>;</span></p></td>
<td>The name of the object</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *<em class="structfield"><code><a name="GstObject-struct.parent"></a>parent</code></em>;</span></p></td>
<td>this object's parent, weak ref</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">guint32</span> <em class="structfield"><code><a name="GstObject-struct.flags"></a>flags</code></em>;</span></p></td>
<td>flags for this object</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstObjectClass"></a><h3>struct GstObjectClass</h3>
<pre class="programlisting">struct GstObjectClass {
GInitiallyUnownedClass parent_class;
const gchar *path_string_separator;
/* signals */
void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
/* virtual methods for subclasses */
};
</pre>
<p>
GStreamer base object class.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnownedClass"><span class="type">GInitiallyUnownedClass</span></a> <em class="structfield"><code><a name="GstObjectClass.parent-class"></a>parent_class</code></em>;</span></p></td>
<td>parent</td>
</tr>
<tr>
<td><p><span class="term">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GstObjectClass.path-string-separator"></a>path_string_separator</code></em>;</span></p></td>
<td>separator used by <a class="link" href="GstObject.html#gst-object-get-path-string" title="gst_object_get_path_string ()"><code class="function">gst_object_get_path_string()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstObjectClass.deep-notify"></a>deep_notify</code></em> ()</span></p></td>
<td>default signal handler</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstObjectFlags"></a><h3>enum GstObjectFlags</h3>
<pre class="programlisting">typedef enum {
/* padding */
GST_OBJECT_FLAG_LAST = (1<<4)
} GstObjectFlags;
</pre>
<p>
The standard flags that an gstobject may have.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><a name="GST-OBJECT-FLAG-LAST:CAPS"></a><span class="term"><code class="literal">GST_OBJECT_FLAG_LAST</code></span></p></td>
<td>subclasses can add additional flags starting from this flag
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-FLAGS:CAPS"></a><h3>GST_OBJECT_FLAGS()</h3>
<pre class="programlisting">#define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
</pre>
<p>
This macro returns the entire set of flags for the object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-FLAG-IS-SET:CAPS"></a><h3>GST_OBJECT_FLAG_IS_SET()</h3>
<pre class="programlisting">#define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
</pre>
<p>
This macro checks to see if the given flag is set.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>Flag to check for</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-FLAG-SET:CAPS"></a><h3>GST_OBJECT_FLAG_SET()</h3>
<pre class="programlisting">#define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
</pre>
<p>
This macro sets the given bits.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>Flag to set</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-FLAG-UNSET:CAPS"></a><h3>GST_OBJECT_FLAG_UNSET()</h3>
<pre class="programlisting">#define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
</pre>
<p>
This macro usets the given bits.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>flag</code></em> :</span></p></td>
<td>Flag to set</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-NAME:CAPS"></a><h3>GST_OBJECT_NAME()</h3>
<pre class="programlisting">#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
</pre>
<p>
Get the name of this object
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-PARENT:CAPS"></a><h3>GST_OBJECT_PARENT()</h3>
<pre class="programlisting">#define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
</pre>
<p>
Get the parent of this object
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-REFCOUNT:CAPS"></a><h3>GST_OBJECT_REFCOUNT()</h3>
<pre class="programlisting">#define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
</pre>
<p>
Get access to the reference count field of the object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-REFCOUNT-VALUE:CAPS"></a><h3>GST_OBJECT_REFCOUNT_VALUE()</h3>
<pre class="programlisting">#define GST_OBJECT_REFCOUNT_VALUE(obj) g_atomic_int_get ((gint *) &GST_OBJECT_REFCOUNT(obj))
</pre>
<p>
Get the reference count value of the object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-LOCK:CAPS"></a><h3>GST_OBJECT_LOCK()</h3>
<pre class="programlisting">#define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
</pre>
<p>
This macro will obtain a lock on the object, making serialization possible.
It blocks until the lock can be obtained.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to lock</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-TRYLOCK:CAPS"></a><h3>GST_OBJECT_TRYLOCK()</h3>
<pre class="programlisting">#define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
</pre>
<p>
This macro will try to obtain a lock on the object, but will return with
FALSE if it can't get it immediately.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-UNLOCK:CAPS"></a><h3>GST_OBJECT_UNLOCK()</h3>
<pre class="programlisting">#define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
</pre>
<p>
This macro releases a lock on the object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to unlock.</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-OBJECT-GET-LOCK:CAPS"></a><h3>GST_OBJECT_GET_LOCK()</h3>
<pre class="programlisting">#define GST_OBJECT_GET_LOCK(obj) (&GST_OBJECT_CAST(obj)->lock)
</pre>
<p>
Acquire a reference to the mutex of this object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-set-name"></a><h3>gst_object_set_name ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_set_name (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>
Sets the name of <em class="parameter"><code>object</code></em>, or gives <em class="parameter"><code>object</code></em> a guaranteed unique
name (if <em class="parameter"><code>name</code></em> is NULL).
This function makes a copy of the provided name, so the caller
retains ownership of the name it sent.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>new name of object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if the name could be set. Since Objects that have
a parent cannot be renamed, this function returns FALSE in those
cases.
MT safe. This function grabs and releases <em class="parameter"><code>object</code></em>'s LOCK.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-name"></a><h3>gst_object_get_name ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gst_object_get_name (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Returns a copy of the name of <em class="parameter"><code>object</code></em>.
Caller should <a href="http://library.gnome.org/devel/glib/unstable/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> the return value after usage.
For a nameless object, this returns NULL, which you can safely <a href="http://library.gnome.org/devel/glib/unstable/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a>
as well.
</p>
<p>
Free-function: g_free
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the name of <em class="parameter"><code>object</code></em>. <a href="http://library.gnome.org/devel/glib/unstable/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage.
MT safe. This function grabs and releases <em class="parameter"><code>object</code></em>'s LOCK. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-set-parent"></a><h3>gst_object_set_parent ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_set_parent (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);</pre>
<p>
Sets the parent of <em class="parameter"><code>object</code></em> to <em class="parameter"><code>parent</code></em>. The object's reference count will
be incremented, and any floating reference will be removed (see <a class="link" href="GstObject.html#gst-object-ref-sink" title="gst_object_ref_sink ()"><code class="function">gst_object_ref_sink()</code></a>).
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>new parent of object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if <em class="parameter"><code>parent</code></em> could be set or FALSE when <em class="parameter"><code>object</code></em>
already had a parent or <em class="parameter"><code>object</code></em> and <em class="parameter"><code>parent</code></em> are the same.
MT safe. Grabs and releases <em class="parameter"><code>object</code></em>'s LOCK.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-parent"></a><h3>gst_object_get_parent ()</h3>
<pre class="programlisting"><a class="link" href="GstObject.html" title="GstObject"><span class="returnvalue">GstObject</span></a> * gst_object_get_parent (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Returns the parent of <em class="parameter"><code>object</code></em>. This function increases the refcount
of the parent object so you should <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()"><code class="function">gst_object_unref()</code></a> it after usage.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>parent of <em class="parameter"><code>object</code></em>, this can be NULL if <em class="parameter"><code>object</code></em>
has no parent. unref after usage.
MT safe. Grabs and releases <em class="parameter"><code>object</code></em>'s LOCK. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-unparent"></a><h3>gst_object_unparent ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_unparent (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Clear the parent of <em class="parameter"><code>object</code></em>, removing the associated reference.
This function decreases the refcount of <em class="parameter"><code>object</code></em>.
</p>
<p>
MT safe. Grabs and releases <em class="parameter"><code>object</code></em>'s lock.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to unparent</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-default-deep-notify"></a><h3>gst_object_default_deep_notify ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_default_deep_notify (<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *orig</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> *pspec</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **excluded_props</code></em>);</pre>
<p>
A default deep_notify signal callback for an object. The user data
should contain a pointer to an array of strings that should be excluded
from the notify. The default handler will print the new value of the property
using g_print.
</p>
<p>
MT safe. This function grabs and releases <em class="parameter"><code>object</code></em>'s LOCK for getting its
path string.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> that signalled the notify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>orig</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that initiated the notify.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pspec</code></em> :</span></p></td>
<td>a <a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> of the property.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>excluded_props</code></em> :</span></p></td>
<td>a set of user-specified properties to exclude or NULL to show
all changes. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> gchar*][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-default-error"></a><h3>gst_object_default_error ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_default_error (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *source</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>);</pre>
<p>
A default error function that uses <a href="http://library.gnome.org/devel/glib/unstable/glib-Warnings-and-Assertions.html#g-printerr"><code class="function">g_printerr()</code></a> to display the error message
and the optional debug sting..
</p>
<p>
The default handler will simply print the error string using g_print.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>source</code></em> :</span></p></td>
<td>the <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that initiated the error.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>the GError. <span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>debug</code></em> :</span></p></td>
<td>an additional debug information string, or NULL. <span class="annotation">[<acronym title="Parameter for input. Default is transfer none."><span class="acronym">in</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-check-uniqueness"></a><h3>gst_object_check_uniqueness ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_check_uniqueness (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>
Checks to see if there is any object named <em class="parameter"><code>name</code></em> in <em class="parameter"><code>list</code></em>. This function
does not do any locking of any kind. You might want to protect the
provided list with the lock of the owner of the list. This function
will lock each <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> in the list to compare the name, so be
carefull when passing a list with a locked object.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>list</code></em> :</span></p></td>
<td>a list of <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to
check through. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gst.Object]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name to search for</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> named <em class="parameter"><code>name</code></em> does not appear in <em class="parameter"><code>list</code></em>,
FALSE if it does.
MT safe. Grabs and releases the LOCK of each object in the list.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-has-ancestor"></a><h3>gst_object_has_ancestor ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_has_ancestor (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *ancestor</code></em>);</pre>
<p>
Check if <em class="parameter"><code>object</code></em> has an ancestor <em class="parameter"><code>ancestor</code></em> somewhere up in
the hierarchy. One can e.g. check if a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> is inside a <a class="link" href="GstPipeline.html" title="GstPipeline"><span class="type">GstPipeline</span></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to check</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ancestor</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to check as ancestor</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if <em class="parameter"><code>ancestor</code></em> is an ancestor of <em class="parameter"><code>object</code></em>.
MT safe. Grabs and releases <em class="parameter"><code>object</code></em>'s locks.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-ref"></a><h3>gst_object_ref ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> gst_object_ref (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);</pre>
<p>
Increments the reference count on <em class="parameter"><code>object</code></em>. This function
does not take the lock on <em class="parameter"><code>object</code></em> because it relies on
atomic refcounting.
</p>
<p>
This object returns the input parameter to ease writing
constructs like :
result = gst_object_ref (object->parent);
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to reference. <span class="annotation">[<acronym title="Override the parsed C type with given type."><span class="acronym">type</span></acronym> Gst.Object]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A pointer to <em class="parameter"><code>object</code></em>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="Override the parsed C type with given type."><span class="acronym">type</span></acronym> Gst.Object]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-unref"></a><h3>gst_object_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_unref (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);</pre>
<p>
Decrements the reference count on <em class="parameter"><code>object</code></em>. If reference count hits
zero, destroy <em class="parameter"><code>object</code></em>. This function does not take the lock
on <em class="parameter"><code>object</code></em> as it relies on atomic refcounting.
</p>
<p>
The unref method should never be called with the LOCK held since
this might deadlock the dispose function.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to unreference. <span class="annotation">[<acronym title="Override the parsed C type with given type."><span class="acronym">type</span></acronym> Gst.Object]</span>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-ref-sink"></a><h3>gst_object_ref_sink ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a> gst_object_ref_sink (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> object</code></em>);</pre>
<p>
Increase the reference count of <em class="parameter"><code>object</code></em>, and possibly remove the floating
reference, if <em class="parameter"><code>object</code></em> has a floating reference.
</p>
<p>
In other words, if the object is floating, then this call "assumes ownership"
of the floating reference, converting it to a normal reference by clearing
the floating flag while leaving the reference count unchanged. If the object
is not floating, then this call adds a new normal reference increasing the
reference count by one.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to sink</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-replace"></a><h3>gst_object_replace ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_replace (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> **oldobj</code></em>,
<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *newobj</code></em>);</pre>
<p>
Atomically modifies a pointer to point to a new object.
The reference count of <em class="parameter"><code>oldobj</code></em> is decreased and the reference count of
<em class="parameter"><code>newobj</code></em> is increased.
</p>
<p>
Either <em class="parameter"><code>newobj</code></em> and the value pointed to by <em class="parameter"><code>oldobj</code></em> may be NULL.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>oldobj</code></em> :</span></p></td>
<td>pointer to a place of a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> to
replace. <span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>newobj</code></em> :</span></p></td>
<td>a new <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>TRUE if <em class="parameter"><code>newobj</code></em> was different from <em class="parameter"><code>oldobj</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-path-string"></a><h3>gst_object_get_path_string ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gst_object_get_path_string (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Generates a string describing the path of <em class="parameter"><code>object</code></em> in
the object hierarchy. Only useful (or used) for debugging.
</p>
<p>
Free-function: g_free
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a string describing the path of <em class="parameter"><code>object</code></em>. You must
<a href="http://library.gnome.org/devel/glib/unstable/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> the string after usage.
MT safe. Grabs and releases the <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>'s LOCK for all objects
in the hierarchy. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-suggest-next-sync"></a><h3>gst_object_suggest_next_sync ()</h3>
<pre class="programlisting"><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="returnvalue">GstClockTime</span></a> gst_object_suggest_next_sync (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Returns a suggestion for timestamps where buffers should be split
to get best controller results.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>Returns the suggested timestamp or <a class="link" href="GstClock.html#GST-CLOCK-TIME-NONE:CAPS" title="GST_CLOCK_TIME_NONE"><code class="literal">GST_CLOCK_TIME_NONE</code></a>
if no control-rate was set.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-sync-values"></a><h3>gst_object_sync_values ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_sync_values (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>);</pre>
<p>
Sets the properties of the object, according to the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstControlSource.html"><span class="type">GstControlSources</span></a> that
(maybe) handle them and for the given timestamp.
</p>
<p>
If this function fails, it is most likely the application developers fault.
Most probably the control sources are not setup correctly.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>the time that should be processed</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the controller values could be applied to the object
properties, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-has-active-control-bindings"></a><h3>gst_object_has_active_control_bindings ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_has_active_control_bindings
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Check if the <em class="parameter"><code>object</code></em> has an active controlled properties.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the object has active controlled properties</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-set-control-bindings-disabled"></a><h3>gst_object_set_control_bindings_disabled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_set_control_bindings_disabled
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> disabled</code></em>);</pre>
<p>
This function is used to disable all controlled properties of the <em class="parameter"><code>object</code></em> for
some time, i.e. <a class="link" href="GstObject.html#gst-object-sync-values" title="gst_object_sync_values ()"><code class="function">gst_object_sync_values()</code></a> will do nothing.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>disabled</code></em> :</span></p></td>
<td>boolean that specifies whether to disable the controller
or not.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-set-control-binding-disabled"></a><h3>gst_object_set_control_binding_disabled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_set_control_binding_disabled
(<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> disabled</code></em>);</pre>
<p>
This function is used to disable the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstController.html"><span class="type">GstController</span></a> on a property for
some time, i.e. <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstController.html#gst-controller-sync-values"><code class="function">gst_controller_sync_values()</code></a> will do nothing for the
property.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>property_name</code></em> :</span></p></td>
<td>property to disable</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>disabled</code></em> :</span></p></td>
<td>boolean that specifies whether to disable the controller
or not.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-add-control-binding"></a><h3>gst_object_add_control_binding ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_add_control_binding (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> *binding</code></em>);</pre>
<p>
Attach the <a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> to the object. If there already was a
<a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> for this property it will be replaced.
</p>
<p>
The <em class="parameter"><code>object</code></em> will take ownership of the <em class="parameter"><code>binding</code></em>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the controller object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>binding</code></em> :</span></p></td>
<td>the <a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> that should be used. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if the given <em class="parameter"><code>binding</code></em> has not been setup for this object or
has been setup for a non suitable property, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> otherwise.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-control-binding"></a><h3>gst_object_get_control_binding ()</h3>
<pre class="programlisting"><a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="returnvalue">GstControlBinding</span></a> * gst_object_get_control_binding (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>);</pre>
<p>
Gets the corresponding <a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> for the property. This should be
unreferenced again after use.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>property_name</code></em> :</span></p></td>
<td>name of the property</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> for <em class="parameter"><code>property_name</code></em> or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if
the property is not controlled. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-remove-control-binding"></a><h3>gst_object_remove_control_binding ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_remove_control_binding (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a> *binding</code></em>);</pre>
<p>
Removes the corresponding <a class="link" href="GstControlBinding.html" title="GstControlBinding"><span class="type">GstControlBinding</span></a>. If it was the
last ref of the binding, it will be disposed.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>binding</code></em> :</span></p></td>
<td>the binding</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the binding could be removed.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-value"></a><h3>gst_object_get_value ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="returnvalue">GValue</span></a> * gst_object_get_value (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>);</pre>
<p>
Gets the value for the given controlled property at the requested time.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>property_name</code></em> :</span></p></td>
<td>the name of the property to get</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>the time the control-change should be read from</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the GValue of the property at the given time, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the
property isn't controlled.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-value-array"></a><h3>gst_object_get_value_array ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_get_value_array (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> interval</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_values</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> values</code></em>);</pre>
<p>
Gets a number of values for the given controlled property starting at the
requested time. The array <em class="parameter"><code>values</code></em> need to hold enough space for <em class="parameter"><code>n_values</code></em> of
the same type as the objects property's type.
</p>
<p>
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.
</p>
<p>
The values are unboxed and ready to be used. The similar function
<a class="link" href="GstObject.html#gst-object-get-g-value-array" title="gst_object_get_g_value_array ()"><code class="function">gst_object_get_g_value_array()</code></a> returns the array as <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValues</span></a> and is
better suites for bindings.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>property_name</code></em> :</span></p></td>
<td>the name of the property to get</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>the time that should be processed</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interval</code></em> :</span></p></td>
<td>the time spacing between subsequent values</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n_values</code></em> :</span></p></td>
<td>the number of values</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>values</code></em> :</span></p></td>
<td>array to put control-values in</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the given array could be filled, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-g-value-array"></a><h3>gst_object_get_g_value_array ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_object_get_g_value_array (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code>const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> timestamp</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> interval</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_values</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> *values</code></em>);</pre>
<p>
Gets a number of <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValues</span></a> for the given controlled property starting at the
requested time. The array <em class="parameter"><code>values</code></em> need to hold enough space for <em class="parameter"><code>n_values</code></em> of
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-Generic-values.html#GValue"><span class="type">GValue</span></a>.
</p>
<p>
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>property_name</code></em> :</span></p></td>
<td>the name of the property to get</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>timestamp</code></em> :</span></p></td>
<td>the time that should be processed</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>interval</code></em> :</span></p></td>
<td>the time spacing between subsequent values</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n_values</code></em> :</span></p></td>
<td>the number of values</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>values</code></em> :</span></p></td>
<td>array to put control-values in</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the given array could be filled, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-get-control-rate"></a><h3>gst_object_get_control_rate ()</h3>
<pre class="programlisting"><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="returnvalue">GstClockTime</span></a> gst_object_get_control_rate (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>);</pre>
<p>
Obtain the control-rate for this <em class="parameter"><code>object</code></em>. Audio processing <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>
objects will use this rate to sub-divide their processing loop and call
<a class="link" href="GstObject.html#gst-object-sync-values" title="gst_object_sync_values ()"><code class="function">gst_object_sync_values()</code></a> inbetween. The length of the processing segment
should be up to <em class="parameter"><code>control</code></em>-rate nanoseconds.
</p>
<p>
If the <em class="parameter"><code>object</code></em> is not under property control, this will return
<a class="link" href="GstClock.html#GST-CLOCK-TIME-NONE:CAPS" title="GST_CLOCK_TIME_NONE"><code class="literal">GST_CLOCK_TIME_NONE</code></a>. This allows the element to avoid the sub-dividing.
</p>
<p>
The control-rate is not expected to change if the element is in
<a class="link" href="GstElement.html#GST-STATE-PAUSED:CAPS"><code class="literal">GST_STATE_PAUSED</code></a> or <a class="link" href="GstElement.html#GST-STATE-PLAYING:CAPS"><code class="literal">GST_STATE_PLAYING</code></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the control rate in nanoseconds</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-object-set-control-rate"></a><h3>gst_object_set_control_rate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_object_set_control_rate (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> control_rate</code></em>);</pre>
<p>
Change the control-rate for this <em class="parameter"><code>object</code></em>. Audio processing <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>
objects will use this rate to sub-divide their processing loop and call
<a class="link" href="GstObject.html#gst-object-sync-values" title="gst_object_sync_values ()"><code class="function">gst_object_sync_values()</code></a> inbetween. The length of the processing segment
should be up to <em class="parameter"><code>control</code></em>-rate nanoseconds.
</p>
<p>
The control-rate should not change if the element is in <a class="link" href="GstElement.html#GST-STATE-PAUSED:CAPS"><code class="literal">GST_STATE_PAUSED</code></a> or
<a class="link" href="GstElement.html#GST-STATE-PLAYING:CAPS"><code class="literal">GST_STATE_PLAYING</code></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>the object that has controlled properties</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>control_rate</code></em> :</span></p></td>
<td>the new control-rate in nanoseconds.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GstObject.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstObject--name"></a><h3>The <code class="literal">"name"</code> property</h3>
<pre class="programlisting"> "name" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write / Construct</pre>
<p>The name of the object.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="GstObject--parent"></a><h3>The <code class="literal">"parent"</code> property</h3>
<pre class="programlisting"> "parent" <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>* : Read / Write</pre>
<p>The parent of the object.</p>
</div>
</div>
<div class="refsect1">
<a name="GstObject.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GstObject-deep-notify"></a><h3>The <code class="literal">"deep-notify"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *gstobject,
<a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *prop_object,
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> *prop,
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-NO-HOOKS:CAPS"><code class="literal">No Hooks</code></a></pre>
<p>
The deep notify signal is used to be notified of property changes. It is
typically attached to the toplevel bin to receive notifications from all
the elements contained in that bin.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>gstobject</code></em> :</span></p></td>
<td>a <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>prop_object</code></em> :</span></p></td>
<td>the object that originated the signal</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>prop</code></em> :</span></p></td>
<td>the property that changed</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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