gstreamermm: Gst::PadTemplate Class Reference

A class that describes the media type of a pad. More...

Inheritance diagram for Gst::PadTemplate:

Collaboration diagram for Gst::PadTemplate:

Public Member Functions
virtual	~PadTemplate ()

GstPadTemplate*	gobj ()
	Provides access to the underlying C GObject. More...

const GstPadTemplate*	gobj () const
	Provides access to the underlying C GObject. More...

GstPadTemplate*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...

Glib::RefPtr< Gst::Caps >	get_caps ()
	Gets the capabilities of the pad template. More...

Glib::RefPtr< const Gst::Caps >	get_caps () const
	Gets the capabilities of the pad template. More...

Glib::ustring	get_name_template () const
	Get the nametemplate of the padtemplate. More...

PadDirection	get_direction () const
	Get the Gst::PadDirection of the padtemplate. More...

PadPresence	get_presence () const
	Get the Gst::PadPresence of the padtemplate. More...

Glib::PropertyProxy_ReadOnly < Glib::RefPtr< Gst::Caps > >	property_caps () const
	The capabilities of the pad described by the pad template. More...

Glib::PropertyProxy_ReadOnly < Gst::PadDirection >	property_direction () const
	The direction of the pad described by the pad template. More...

Glib::PropertyProxy_ReadOnly < Glib::ustring >	property_name_template () const
	The name template of the pad template. More...

Glib::PropertyProxy_ReadOnly < Gst::PadPresence >	property_presence () const
	When the pad described by the pad template will become available. More...

Glib::SignalProxy1< void, const Glib::RefPtr< Gst::Pad >& >	signal_pad_created ()

Public Member Functions inherited from Gst::Object
virtual	~Object ()

GstObject*	gobj ()
	Provides access to the underlying C GObject. More...

const GstObject*	gobj () const
	Provides access to the underlying C GObject. More...

GstObject*	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...

bool	is_element () const

bool	is_element_factory () const

bool	is_pad () const

bool	is_pad_template () const

bool	is_bin () const

guint32	get_flags () const
	Returns the entire set of flags for the object. More...

bool	set_name (const Glib::ustring& name)
	Sets the name of object, or gives object a guaranteed unique name (if name is `0`). More...

Glib::ustring	get_name () const
	Returns a copy of the name of object. More...

bool	set_parent (const Glib::RefPtr< Gst::Object >& parent)
	Sets the parent of object to parent. More...

Glib::RefPtr< Gst::Object >	get_parent ()
	Returns the parent of object. More...

Glib::RefPtr< const Gst::Object >	get_parent () const
	Returns the parent of object. More...

void	unparent ()
	Clear the parent of object, removing the associated reference. More...

bool	has_ancestor (const Glib::RefPtr< const Gst::Object >& ancestor) const
	Check if object has an ancestor ancestor somewhere up in the hierarchy. More...

Glib::ustring	get_path_string ()
	Generates a string describing the path of object in the object hierarchy. More...

Glib::PropertyProxy < Glib::ustring >	property_name ()
	The name of the object. More...

Glib::PropertyProxy_ReadOnly < Glib::ustring >	property_name () const
	The name of the object. More...

Glib::SignalProxy2< void, const Glib::RefPtr< Object > &, GParamSpec* >	signal_deep_notify ()

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

static Glib::RefPtr< PadTemplate >	create (const Glib::ustring& name_template, PadDirection direction, PadPresence presence, const Glib::RefPtr< Gst::Caps >& caps)
	Creates a new pad template with a name according to the given template and with the given arguments. More...

Static Public Member Functions inherited from Gst::Object
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

static bool	check_uniqueness (const Glib::ListHandle< const Gst::Object >& list, const Glib::ustring& name)
	Checks to see if there is any object named name in list. More...

Protected Member Functions
	PadTemplate (const Glib::ustring& name_template, PadDirection direction, PadPresence presence, const Glib::RefPtr< Gst::Caps >& caps)

virtual void	on_pad_created (const Glib::RefPtr< Gst::Pad >& pad)
	This is a default handler for the signal signal_pad_created(). More...

Protected Member Functions inherited from Gst::Object
virtual void	on_deep_notify (const Glib::RefPtr< Object >& prop_object, GParamSpec* prop)
	This is a default handler for the signal signal_deep_notify(). More...

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gst::PadTemplate >	wrap (GstPadTemplate* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Related Functions inherited from Gst::Object
Glib::RefPtr< Gst::Object >	wrap (GstObject* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Detailed Description

A class that describes the media type of a pad.

Padtemplates describe the possible media types a pad or an elementfactory can handle. This allows for both inspection of handled types before loading the element plugin as well as identifying pads on elements that are not yet created (request or sometimes pads).

Gst::Pad and PadTemplates have Gst::Caps attached to it to describe the media type they are capable of dealing with. get_caps() is used to get the caps of a padtemplate. It's not possible to modify the caps of a padtemplate after creation.

PadTemplates have a Gst::PadPresence property which identifies the lifetime of the pad and that can be retrieved with get_presence(). Also the direction of the pad can be retrieved from the GstPadTemplate with get_direction().

The get_name_template() method is important for Gst::PAD_REQUEST pads because it has to be used as the name in the Gst::Element::get_request_pad() call to instantiate a pad from this template.

Padtemplates can be created with create().

A padtemplate can be used to create a pad (see Gst::Pad::create() methods).

Constructor & Destructor Documentation

virtual Gst::PadTemplate::~PadTemplate ( )

virtual

Gst::PadTemplate::PadTemplate	(	const Glib::ustring &	name_template,
		PadDirection	direction,
		PadPresence	presence,
		const Glib::RefPtr< Gst::Caps >&	caps
	)

explicitprotected

Member Function Documentation

static Glib::RefPtr<PadTemplate> Gst::PadTemplate::create	(	const Glib::ustring &	name_template,
		PadDirection	direction,
		PadPresence	presence,
		const Glib::RefPtr< Gst::Caps >&	caps
	)

static

Creates a new pad template with a name according to the given template and with the given arguments.

This functions takes ownership of the provided caps, so be sure to not use them afterwards.

Parameters

name_template	The name template.
direction	The Gst::PadDirection of the template.
presence	The Gst::PadPresence of the pad.
caps	A Gst::Caps set for the template. The caps are taken ownership of.

Returns: A new Gst::PadTemplate.

Glib::RefPtr<Gst::Caps> Gst::PadTemplate::get_caps ( )

Gets the capabilities of the pad template.

Returns: The Gst::Caps of the pad template. Unref after usage.

Glib::RefPtr<const Gst::Caps> Gst::PadTemplate::get_caps ( ) const

Gets the capabilities of the pad template.

Returns: The Gst::Caps of the pad template. Unref after usage.

PadDirection Gst::PadTemplate::get_direction ( ) const

Get the Gst::PadDirection of the padtemplate.

Glib::ustring Gst::PadTemplate::get_name_template ( ) const

Get the nametemplate of the padtemplate.

PadPresence Gst::PadTemplate::get_presence ( ) const

Get the Gst::PadPresence of the padtemplate.

static GType Gst::PadTemplate::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

GstPadTemplate* Gst::PadTemplate::gobj ( )

inline

Provides access to the underlying C GObject.

const GstPadTemplate* Gst::PadTemplate::gobj ( ) const

inline

Provides access to the underlying C GObject.

GstPadTemplate* Gst::PadTemplate::gobj_copy ( )

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

virtual void Gst::PadTemplate::on_pad_created ( const Glib::RefPtr< Gst::Pad >& pad )

protectedvirtual

This is a default handler for the signal signal_pad_created().

Glib::PropertyProxy_ReadOnly< Glib::RefPtr<Gst::Caps> > Gst::PadTemplate::property_caps ( ) const

The capabilities of the pad described by the pad template.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Gst::PadDirection > Gst::PadTemplate::property_direction ( ) const

The direction of the pad described by the pad template.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Glib::ustring > Gst::PadTemplate::property_name_template ( ) const

The name template of the pad template.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Gst::PadPresence > Gst::PadTemplate::property_presence ( ) const

When the pad described by the pad template will become available.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns: A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::SignalProxy1< void,const Glib::RefPtr<Gst::Pad>& > Gst::PadTemplate::signal_pad_created ( )

Slot Prototype:: void on_my_pad_created(const Glib::RefPtr<Gst::Pad>& pad)

This signal is fired when an element creates a pad from this template.

Parameters

pad	The pad that was created.

Friends And Related Function Documentation

Glib::RefPtr< Gst::PadTemplate > wrap	(	GstPadTemplate *	object,
		bool	take_copy = `false`
	)

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns: A C++ instance that wraps this C instance.

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

gstreamermm/padtemplate.h

gstreamermm: Gst::PadTemplate Class Reference

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation