ElementFactory

Object Hierarchy:

Description:

public class ElementFactory : PluginFeature

ElementFactory is used to create instances of elements. A GstElementfactory can be added to a Plugin as it is also a PluginFeature. Use the find and create functions to create element instances or use make as a convenient shortcut. The following code example shows you how to create a GstFileSrc element.

Using an element factory:


#include &lt;gst/gst.h&gt;
GstElement *src;
GstElementFactory *srcfactory;
gst_init (&amp;argc, &amp;argv);
srcfactory = gst_element_factory_find ("filesrc");
g_return_if_fail (srcfactory != NULL);
src = gst_element_factory_create (srcfactory, "src");
g_return_if_fail (src != NULL);
...

Last reviewed on 2005-11-23 (0.9.5)

Namespace: Gst

Package: gstreamer-0.10

Content:

Static methods:

public static ElementFactory? find (string name)
Search for an element factory of the given name. Refs the returned element factory; caller is responsible for unreffing.
public static unowned List list_filter (List list, Caps caps, PadDirection direction, bool subsetonly)
Filter out all the elementfactories in list that can handle caps in the given direction. If subsetonly is true, then only the elements whose pads templates are a complete superset of caps will be returned. Else any element whose pad templates caps can intersect with caps will be returned. ElementFactory elements that match the given requisits. Use gst_plugin_feature_list_free after usage.
public static unowned List list_get_elements (ElementFactoryListType type, Rank minrank)
Get a list of factories that match the given type. Only elements with a rank greater or equal to minrank will be returned. The list of factories is returned by decreasing rank. ElementFactory elements. Use gst_plugin_feature_list_free after usage.
public static Element? make (string factoryname, string? name)
Create a new element of the type defined by the given element factory. If name is NULL, then the element will receive a guaranteed unique name, consisting of the element factory name and a number. If name is given, it will be given the name supplied.

Creation methods:

protected ElementFactory ()

Methods:

public bool can_sink_all_caps (Caps caps)
Checks if the factory can sink all possible capabilities.
public bool can_sink_any_caps (Caps caps)
Checks if the factory can sink any possible capability.
public bool can_sink_caps (Caps caps)
Checks if the factory can sink the given capability.
public bool can_src_all_caps (Caps caps)
Checks if the factory can src all possible capabilities.
public bool can_src_any_caps (Caps caps)
Checks if the factory can src any possible capability.
public bool can_src_caps (Caps caps)
Checks if the factory can source the given capability.
public Element? create (string? name)
Create a new element of the type defined by the given elementfactory. It will be given the name supplied, since all elements require a name as their first argument. be created
public unowned string get_author ()
Gets the author for this factory.
public unowned string get_description ()
Gets the description for this factory.
public unowned string get_documentation_uri ()
Gets documentation uri for this factory if set.
public Type get_element_type ()
Get the Type for elements managed by this factory. The type can only be retrieved if the element factory is loaded, which can be assured with load. the factory is not loaded.
public unowned string get_icon_name ()
Gets icon name for this factory if set.
public unowned string get_klass ()
Gets the class for this factory.
public unowned string get_longname ()
Gets the longname for this factory
public uint get_num_pad_templates ()
Gets the number of pad_templates in this factory.
public unowned List<StaticPadTemplate> get_static_pad_templates ()
Gets the List of StaticPadTemplate for this factory. static pad templates
public string[]? get_uri_protocols ()
Gets a NULL-terminated array of protocols this element supports or NULL if no protocols are supported. You may not change the contents of the returned array, as it is still owned by the element factory. Use g_strdupv to make a copy of the protocol string array if you need to. or NULL
public int get_uri_type ()
Gets the type of URIs the element supports or UNKNOWN if none.
public bool has_interface (string interfacename)
Check if factory implements the interface with name interfacename.
public bool list_is_type (ElementFactoryListType type)
Check if factory if of the given types.