gstreamermm  0.10.10.2
Public Member Functions
Gst::ElementInterfaced< T_Interface > Class Template Reference

A templated class used for casting Gst::Element to interfaces that its underlying gobject implements. More...

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List of all members.

Public Member Functions

virtual ~ElementInterfaced ()
GstElement* gobj ()
 Gets the underlying gobject.
const GstElement* gobj () const
 Gets the underlying gobject.
GstElement* gobj_copy ()
 Gets a copy of the underlying gobject. The copy should be freed.

Detailed Description

template<class T_Interface>
class Gst::ElementInterfaced< T_Interface >

A templated class used for casting Gst::Element to interfaces that its underlying gobject implements.

Gst::ElementInterfaced is a templated class which, in conjunction with Gst::Interface::cast(), is used to cast a Gst::Element obtained by Gst::ElementFactory::create_element() into underlying GStreamer interfaces that the element may implement. A 'filesrc' element, for example, implements the Gst::URIHandler interface (which is not reflected in a Gst::Element obtained from a Gst::ElementFactory). To use the Gst::URIHandler methods with a 'filesrc' element obtained from a Gst::ElementFactory, one would do the following:

 ...
 Glib::RefPtr<Gst::Element> element =
 Gst::ElementFactory::create_element("filesrc", "source");

 Glib::RefPtr< Gst::ElementInterfaced<Gst::URIHandler> > handler =
   Gst::Interface::cast<Gst::URIHandler>(element);

 if(handler)
 {
   std::cout << "element '" << element->get_name() <<
     "' implements URIHandler interface." << std::endl;

   // Use uri handler interface methods:

   handler->set_uri("file:///tmp/media.file");

   std::cout << handler->get_name() << " uri = '" << handler->get_uri() <<
     "'." << std::endl;
 }

Constructor & Destructor Documentation

template <class T_Interface >
virtual Gst::ElementInterfaced< T_Interface >::~ElementInterfaced ( ) [virtual]

Member Function Documentation

template <class T_Interface >
GstElement* Gst::ElementInterfaced< T_Interface >::gobj ( ) [inline]

Gets the underlying gobject.

Reimplemented from Gst::Element.

template <class T_Interface >
const GstElement* Gst::ElementInterfaced< T_Interface >::gobj ( ) const [inline]

Gets the underlying gobject.

Reimplemented from Gst::Element.

template <class T_Interface >
GstElement* Gst::ElementInterfaced< T_Interface >::gobj_copy ( ) [inline]

Gets a copy of the underlying gobject. The copy should be freed.

Reimplemented from Gst::Element.


The documentation for this class was generated from the following file: