gstreamer/docs/gst/tmpl/gstelement.sgml

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<!-- ##### SECTION Title ##### -->
GstElement
<!-- ##### SECTION Short_Description ##### -->
Base class for all pipeline elements
<!-- ##### SECTION Long_Description ##### -->
<para>
GstElement is the base class needed to construct an element that can be
used in a GST pipeline. As such, it is not a functional entity, and
cannot do anything when placed in a pipeline.
</para>
<para>
All GstElements have a list containing the #GstPad structure for all their
inputs and outputs. These can be added with gst_element_add_pad() or
gst_element_add_ghost_pad(), and retrieved by name with
gst_element_get_pad(), or in a list form by gst_element_get_pad_list().
</para>
<para>
gst_element_connect() is a convenience function provided to make it
simpler to connect pads of two elements together.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### STRUCT GstElement ##### -->
<para>
</para>
<!-- ##### ENUM GstElementState ##### -->
<para>
This enum defines the standard states an element may be in. GST_STATE_MAX
is the highest bit that can be set, and is used internally.
</para>
@GST_STATE_COMPLETE:
@GST_STATE_RUNNING:
@GST_STATE_DISCOVERY:
@GST_STATE_PREROLL:
@GST_STATE_PLAYING:
@GST_STATE_PAUSED:
@GST_STATE_MAX:
<!-- ##### MACRO GST_STATE ##### -->
<para>
This macro returns the entire state of the element.
</para>
@obj: Element to return state for.
<!-- ##### MACRO GST_STATE_IS_SET ##### -->
<para>
This macro checks to see if the given state is set.
</para>
@obj: Element to check for state.
@flag: State to check for, must be a single bit in guint32.
<!-- ##### MACRO GST_STATE_SET ##### -->
<para>
This macro sets the given state on the element.
</para>
@obj: Element to set state of.
@flag: State to set, can be any number of bits in guint32.
<!-- ##### MACRO GST_STATE_UNSET ##### -->
<para>
This macro unsets the given state on the element.
</para>
@obj: Element to unset state of.
@flag: State to unset, can be any number of bits in guint32.
<!-- ##### STRUCT GstElementDetails ##### -->
<para>
This struct is used to define public information about the element. It
describes the element, mostly for the benefit of editors.
</para>
@longname:
@class:
@description:
@version:
@author:
@copyright:
<!-- ##### STRUCT GstElementFactory ##### -->
<para>
This factory is used when registering the element, and contains the name
of the element, the GtkType value for it, as well as a pointer to the
GstElementDetails struct for the element.
</para>
@name:
@type:
@details:
<!-- ##### USER_FUNCTION GstElementLoopFunction ##### -->
<para>
This function type is used to specify a loop function for the element. It
is passed the element in question, and is expect to return only in error
circumstances.
</para>
@element: The element in question.
<!-- ##### FUNCTION gst_element_new ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION gst_element_set_loop_function ##### -->
<para>
</para>
@element:
@loop:
<!-- ##### FUNCTION gst_element_set_name ##### -->
<para>
</para>
@element:
@name:
<!-- ##### FUNCTION gst_element_get_name ##### -->
<para>
</para>
@element:
@Returns:
<!-- ##### FUNCTION gst_element_set_manager ##### -->
<para>
</para>
@element:
@manager:
<!-- ##### FUNCTION gst_element_get_manager ##### -->
<para>
</para>
@element:
@Returns:
<!-- ##### FUNCTION gst_element_add_pad ##### -->
<para>
</para>
@element:
@pad:
<!-- ##### FUNCTION gst_element_add_ghost_pad ##### -->
<para>
</para>
@element:
@pad:
<!-- ##### FUNCTION gst_element_get_pad ##### -->
<para>
</para>
@element:
@name:
@Returns:
<!-- ##### FUNCTION gst_element_get_pad_list ##### -->
<para>
</para>
@element:
@Returns:
<!-- ##### FUNCTION gst_element_connect ##### -->
<para>
</para>
@src:
@srcpadname:
@dest:
@destpadname:
<!-- # Unused Parameters # -->
@srcpad:
@destpad:
<!-- ##### FUNCTION gst_element_set_state ##### -->
<para>
</para>
@element:
@state:
@Returns:
<!-- ##### FUNCTION gst_element_error ##### -->
<para>
</para>
@element:
@error:
<!-- ##### FUNCTION gst_element_change_state ##### -->
<para>
</para>
@element:
@state:
@Returns:
<!-- ##### MACRO gst_element_destroy ##### -->
<para>
</para>
@element:
<!-- ##### FUNCTION gst_element_save_thyself ##### -->
<para>
</para>
@element:
@parent:
@Returns:
<!-- ##### FUNCTION gst_elementfactory_new ##### -->
<para>
</para>
@name:
@type:
@details:
@Returns:
<!-- ##### FUNCTION gst_elementfactory_register ##### -->
<para>
</para>
@elementfactory:
<!-- ##### FUNCTION gst_elementfactory_find ##### -->
<para>
</para>
@name:
@Returns:
<!-- ##### FUNCTION gst_elementfactory_get_list ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION gst_elementfactory_create ##### -->
<para>
</para>
@factory:
@name:
@Returns:
<!-- ##### FUNCTION gst_elementfactory_make ##### -->
<para>
</para>
@factoryname:
@name:
@Returns:
<!-- ##### SIGNAL GstElement::state-change ##### -->
<para>
</para>
@gstelement: the object which received the signal.
@arg1:
<!-- ##### SIGNAL GstElement::new-pad ##### -->
<para>
</para>
@gstelement: the object which received the signal.
@arg1:
<!-- ##### SIGNAL GstElement::new-ghost-pad ##### -->
<para>
</para>
@gstelement: the object which received the signal.
@arg1:
<!-- ##### SIGNAL GstElement::error ##### -->
<para>
</para>
@gstelement: the object which received the signal.
@arg1: