gstreamermm
0.10.10.2
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A class that describes the media type of a pad. More...
Public Member Functions | |
virtual | ~PadTemplate () |
GstPadTemplate* | gobj () |
Provides access to the underlying C GObject. | |
const GstPadTemplate* | gobj () const |
Provides access to the underlying C GObject. | |
GstPadTemplate* | gobj_copy () |
Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. | |
Glib::RefPtr< Gst::Caps > | get_caps () |
Gets the capabilities of the pad template. | |
Glib::RefPtr< const Gst::Caps > | get_caps () const |
Gets the capabilities of the pad template. | |
Glib::ustring | get_name_template () const |
Get the nametemplate of the padtemplate. | |
PadDirection | get_direction () const |
Get the Gst::PadDirection of the padtemplate. | |
PadPresence | get_presence () const |
Get the Gst::PadPresence of the padtemplate. | |
Glib::PropertyProxy_ReadOnly < Glib::RefPtr< Gst::Caps > > | property_caps () const |
The capabilities of the pad described by the pad template. | |
Glib::PropertyProxy_ReadOnly < Gst::PadDirection > | property_direction () const |
The direction of the pad described by the pad template. | |
Glib::PropertyProxy_ReadOnly < Glib::ustring > | property_name_template () const |
The name template of the pad template. | |
Glib::PropertyProxy_ReadOnly < Gst::PadPresence > | property_presence () const |
When the pad described by the pad template will become available. | |
Glib::SignalProxy1< void, const Glib::RefPtr< Gst::Pad >& > | signal_pad_created () |
This signal is fired when an element creates a pad from this template. | |
Static Public Member Functions | |
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. | |
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(). | |
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. |
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).
virtual Gst::PadTemplate::~PadTemplate | ( | ) | [virtual] |
Gst::PadTemplate::PadTemplate | ( | const Glib::ustring & | name_template, |
PadDirection | direction, | ||
PadPresence | presence, | ||
const Glib::RefPtr< Gst::Caps >& | caps | ||
) | [explicit, protected] |
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.
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. |
Gets the capabilities of the pad template.
Glib::RefPtr<const Gst::Caps> Gst::PadTemplate::get_caps | ( | ) | const |
Gets the capabilities of the pad template.
PadDirection Gst::PadTemplate::get_direction | ( | ) | const |
Get the Gst::PadDirection of the padtemplate.
Get the nametemplate of the padtemplate.
PadPresence Gst::PadTemplate::get_presence | ( | ) | const |
Get the Gst::PadPresence of the padtemplate.
GstPadTemplate* Gst::PadTemplate::gobj | ( | ) | [inline] |
Provides access to the underlying C GObject.
Reimplemented from Gst::Object.
const GstPadTemplate* Gst::PadTemplate::gobj | ( | ) | const [inline] |
Provides access to the underlying C GObject.
Reimplemented from Gst::Object.
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.
Reimplemented from Gst::Object.
virtual void Gst::PadTemplate::on_pad_created | ( | const Glib::RefPtr< Gst::Pad >& | pad | ) | [protected, virtual] |
This is a default handler for the signal signal_pad_created().
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.
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.
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.
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.
Glib::SignalProxy1< void,const Glib::RefPtr<Gst::Pad>& > Gst::PadTemplate::signal_pad_created | ( | ) |
This signal is fired when an element creates a pad from this template.
void on_my_pad_created(const Glib::RefPtr<Gst::Pad>& pad)
Glib::RefPtr< Gst::PadTemplate > wrap | ( | GstPadTemplate * | object, |
bool | take_copy = false |
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) | [related] |
A Glib::wrap() method for this object.
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. |