gstreamermm: Gst::URIHandler Class Reference

An interface to ease URI handling in plugins. More...

Inheritance diagram for Gst::URIHandler:

Collaboration diagram for Gst::URIHandler:

Public Member Functions
virtual	~URIHandler ()

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

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

URIType	get_uri_type () const
	Gets the type of the given URI handler. More...

std::vector< Glib::ustring >	get_protocols () const
	Gets the list of protocols supported by handler. More...

Glib::ustring	get_uri () const
	Gets the currently handled URI. More...

bool	set_uri (const Glib::ustring& uri)
	Tries to set the URI of the given handler. More...

virtual Glib::ustring	get_uri_vfunc () const
	Virtual method which should be implemented to return the URI currently handled by the element. More...

virtual bool	set_uri_vfunc (const Glib::ustring& uri, GError** error)
	Virtual method which should be implemented to set a new URI. More...

virtual const gchar* const*	get_protocols_vfunc () const
	Method to return the list of protocols handled by the element. More...

virtual URIType	get_type_vfunc ()

Static Public Member Functions
static void	add_interface (GType gtype_implementer)

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

static bool	protocol_is_valid (const Glib::ustring& protocol)
	Tests if the given string is a valid protocol identifier. More...

static bool	protocol_is_supported (const URIType type, const Glib::ustring& protocol)
	Checks if an element exists that supports the given URI protocol. More...

static bool	uri_is_valid (const Glib::ustring& uri)
	Tests if the given string is a valid URI identifier. More...

static bool	uri_has_protocol (const Glib::ustring& uri, const Glib::ustring& protocol)
	Checks if the protocol of a given valid URI matches protocol. More...

static Glib::ustring	get_protocol (const Glib::ustring& uri)
	Extracts the protocol out of a given valid URI. More...

static Glib::ustring	get_location (const Glib::ustring& uri)
	Extracts the location out of a given valid URI, ie. More...

static Glib::ustring	construct_uri (const Glib::ustring& protocol, const Glib::ustring& location)
	Constructs a URI for a given valid protocol and location. More...

static Glib::ustring	filename_to_uri (const Glib::ustring& filename)
	Similar to Glib::filename_to_uri(), but attempts to handle relative file paths as well. More...

static Glib::RefPtr< Gst::Element >	make_element_from_uri (const URIType type, const Glib::ustring& uri, const Glib::ustring& name)
	Creates an element for handling the given URI. More...

Protected Member Functions
	URIHandler ()
	You should derive from this class to use it. More...

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

Detailed Description

An interface to ease URI handling in plugins.

The Gst::URIHandler is an interface that is implemented by Source and Sink Gst::Element to simplify then handling of URI.

An application can use the following functions to quickly get an element that handles the given URI for reading or writing (make_element_from_uri()).

Source and Sink plugins should implement this interface when possible.

Last reviewed on 2005-11-09 (0.9.4)

Constructor & Destructor Documentation

Gst::URIHandler::URIHandler ( )

protected

You should derive from this class to use it.

virtual Gst::URIHandler::~URIHandler ( )

virtual

Member Function Documentation

static void Gst::URIHandler::add_interface ( GType gtype_implementer )

static

static Glib::ustring Gst::URIHandler::construct_uri	(	const Glib::ustring &	protocol,
		const Glib::ustring &	location
	)

static

Constructs a URI for a given valid protocol and location.

Free-function: g_free

Parameters

protocol	Protocol for URI.
location	Location for URI.

Returns: A new string for this URI. Returns 0 if the given URI protocol is not valid, or the given location is 0.

static Glib::ustring Gst::URIHandler::filename_to_uri ( const Glib::ustring & filename )

static

Similar to Glib::filename_to_uri(), but attempts to handle relative file paths as well.

Before converting filename into an URI, it will be prefixed by the current working directory if it is a relative path, and then the path will be canonicalised so that it doesn't contain any './' or '../' segments.

On Windows #filename should be in UTF-8 encoding.

Parameters

filename Absolute or relative file name path.

static Glib::ustring Gst::URIHandler::get_location ( const Glib::ustring & uri )

static

Extracts the location out of a given valid URI, ie.

the protocol and "://" are stripped from the URI, which means that the location returned includes the hostname if one is specified. The returned string must be freed using Glib::free().

Free-function: g_free

Parameters

uri	A URI string.

Returns: The location for this URI. Returns 0 if the URI isn't valid. If the URI does not contain a location, an empty string is returned.

static Glib::ustring Gst::URIHandler::get_protocol ( const Glib::ustring & uri )

static

Extracts the protocol out of a given valid URI.

The returned string must be freed using Glib::free().

Parameters

uri	A URI string.

Returns: The protocol for this URI.

std::vector<Glib::ustring> Gst::URIHandler::get_protocols ( ) const

Gets the list of protocols supported by handler.

This list may not be modified.

Returns: The supported protocols. Returns 0 if the handler isn't implemented properly, or the handler doesn't support any protocols.

virtual const gchar* const* Gst::URIHandler::get_protocols_vfunc ( ) const

virtual

Method to return the list of protocols handled by the element.

static GType Gst::URIHandler::get_type ( )

static

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

virtual URIType Gst::URIHandler::get_type_vfunc ( )

virtual

Glib::ustring Gst::URIHandler::get_uri ( ) const

Gets the currently handled URI.

Returns: The URI currently handled by the handler. Returns 0 if there are no URI currently handled. The returned string must be freed with Glib::free() when no longer needed.

URIType Gst::URIHandler::get_uri_type ( ) const

Gets the type of the given URI handler.

Returns: The Gst::URIType of the URI handler. Returns Gst::URI_UNKNOWN if the handler isn't implemented correctly.

virtual Glib::ustring Gst::URIHandler::get_uri_vfunc ( ) const

virtual

Virtual method which should be implemented to return the URI currently handled by the element.

GstURIHandler* Gst::URIHandler::gobj ( )

inline

Provides access to the underlying C GObject.

const GstURIHandler* Gst::URIHandler::gobj ( ) const

inline

Provides access to the underlying C GObject.

static Glib::RefPtr<Gst::Element> Gst::URIHandler::make_element_from_uri	(	const URIType	type,
		const Glib::ustring &	uri,
		const Glib::ustring &	name
	)

static

Creates an element for handling the given URI.

Parameters

type	Whether to create a source or a sink.
uri	URI to create an element for.
elementname	Name of created element, can be `0`.

Returns: A new element or 0 if none could be created.

static bool Gst::URIHandler::protocol_is_supported	(	const URIType	type,
		const Glib::ustring &	protocol
	)

static

Checks if an element exists that supports the given URI protocol.

Note that a positive return value does not imply that a subsequent call to Gst::Element::make_from_uri() is guaranteed to work.

Parameters

type	Whether to check for a source or a sink.
protocol	Protocol that should be checked for (e.g. "http" or "smb").

Returns: true.

static bool Gst::URIHandler::protocol_is_valid ( const Glib::ustring & protocol )

static

Tests if the given string is a valid protocol identifier.

Protocols must consist of alphanumeric characters, '+', '-' and '.' and must start with a alphabetic character. See RFC 3986 Section 3.1.

Parameters

protocol A string.

Returns: true if the string is a valid protocol identifier, false otherwise.

bool Gst::URIHandler::set_uri ( const Glib::ustring & uri )

Tries to set the URI of the given handler.

Parameters

uri	URI to set.

Returns: true if the URI was set successfully, else false.

virtual bool Gst::URIHandler::set_uri_vfunc	(	const Glib::ustring &	uri,
		GError **	error
	)

virtual

Virtual method which should be implemented to set a new URI.

static bool Gst::URIHandler::uri_has_protocol	(	const Glib::ustring &	uri,
		const Glib::ustring &	protocol
	)

static

Checks if the protocol of a given valid URI matches protocol.

Parameters

uri	A URI string.
protocol	A protocol string (e.g. "http").

Returns: true if the protocol matches.

static bool Gst::URIHandler::uri_is_valid ( const Glib::ustring & uri )

static

Tests if the given string is a valid URI identifier.

URIs start with a valid scheme followed by ":" and maybe a string identifying the location.

Parameters

uri	A URI string.

Returns: true if the string is a valid URI.

Friends And Related Function Documentation

Glib::RefPtr< Gst::URIHandler > wrap	(	GstURIHandler *	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/urihandler.h

gstreamermm: Gst::URIHandler 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