gstreamermm: Gst::MessageDuration Class Reference

A duration message. More...

Inheritance diagram for Gst::MessageDuration:

Collaboration diagram for Gst::MessageDuration:

Public Member Functions
void	parse (Format& format, gint64& duration) const
	Extracts the duration and format from the duration message. More...

gint64	parse () const
	Extracts and returns the duration from the duration message. More...

Format	parse_format () const
	Extracts and returns the format from the duration message. More...

Public Member Functions inherited from Gst::Message
void	reference () const
	Increment the reference count for this object. More...

void	unreference () const
	Decrement the reference count for this object. More...

GstMessage*	gobj ()
	Provides access to the underlying C instance. More...

const GstMessage*	gobj () const
	Provides access to the underlying C instance. More...

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

Gst::Structure	get_structure () const
	Access the structure of the message. More...

Glib::RefPtr< Gst::Message >	create_writable ()
	Checks if a message is writable. More...

guint32	get_seqnum () const
	Retrieve the sequence number of a message. More...

void	set_seqnum (guint32 seqnum)
	Set the sequence number of a message. More...

MessageType	get_message_type () const
	Get the GstMessageType of message. More...

ClockTime	get_timestamp () const
	Get the timestamp of message. More...

Glib::RefPtr< Gst::Object >	get_source ()
	Get the object that posted the message. More...

Glib::RefPtr< const Gst::Object >	get_source () const

Public Member Functions inherited from Gst::MiniObject
void	reference () const
	Increment the reference count for this object. More...

void	unreference () const
	Decrement the reference count for this object. More...

GstMiniObject*	gobj ()
	Provides access to the underlying C instance. More...

const GstMiniObject*	gobj () const
	Provides access to the underlying C instance. More...

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

	~MiniObject ()

guint	get_flags () const

void	set_flags (const guint& value)

gint	get_refcount () const

gint	get_lockstate () const

bool	lock (LockFlags flags)
	Lock the mini-object with the specified access mode in flags. More...

void	unlock (LockFlags flags)
	Unlock the mini-object with the specified access mode in flags. More...

bool	is_writable () const
	If mini_object has the LOCKABLE flag set, check if the current EXCLUSIVE lock on object is the only one, this means that changes to the object will not be visible to any other object. More...

Glib::RefPtr< MiniObject >	create_writable ()
	Checks if a mini-object is writable. More...

void	set_qdata (GQuark quark, QuarkData* data)
	This sets an opaque, named pointer on a miniobject. More...

QuarkData*	get_qdata (GQuark quark) const
	This function gets back user data pointers stored via set_qdata(). More...

QuarkData*	steal_qdata (GQuark quark)
	This function gets back user data pointers stored via set_qdata() and removes the data from object without invoking its destroy() function (if any was set). More...

void	add_finalize_notifier (const SlotFinalizer& slot)
	Adds notifier when mini object is finalized. More...

void	remove_finalize_notifier ()
	Remove finalize notifier. More...

Static Public Member Functions
static Glib::RefPtr < Gst::MessageDuration >	create (const Glib::RefPtr< Gst::Object >& src, Format format, gint64 duration)
	Create a new duration message. More...

Additional Inherited Members
Public Types inherited from Gst::MiniObject
typedef sigc::slot< void >	SlotFinalizer

Protected Member Functions inherited from Gst::Message
	Message ()

void	operator delete (void*, std::size_t)

Protected Member Functions inherited from Gst::MiniObject
	MiniObject ()

void	operator delete (void*, std::size_t)

Static Protected Member Functions inherited from Gst::Message
template<class MsgType >
static Glib::RefPtr< MsgType >	wrap (GstMessage* message, bool take_copy=false)

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

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

Detailed Description

A duration message.

See create() for more details.

Member Function Documentation

static Glib::RefPtr<Gst::MessageDuration> Gst::MessageDuration::create	(	const Glib::RefPtr< Gst::Object >&	src,
		Format	format,
		gint64	duration
	)

static

Create a new duration message.

This message is posted by elements that know the duration of a stream in a specific format. This message is received by bins and is used to calculate the total duration of a pipeline. Elements may post a duration message with a duration of Gst::CLOCK_TIME_NONE to indicate that the duration has changed and the cached duration should be discarded. The new duration can then be retrieved via a query.

Parameters

src	The object originating the message.
format	The format of the duration.
duration	The new duration.

Returns: The new duration message. MT safe.

void Gst::MessageDuration::parse	(	Format&	format,
		gint64 &	duration
	)		const

Extracts the duration and format from the duration message.

The duration might be Gst::CLOCK_TIME_NONE, which indicates that the duration has changed. Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Parameters

format	Result location for the format.
duration	Result location for the duration.

gint64 Gst::MessageDuration::parse ( ) const

Extracts and returns the duration from the duration message.

The duration might be Gst::CLOCK_TIME_NONE, which indicates that the duration has changed. Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Returns: The duration.

Format Gst::MessageDuration::parse_format ( ) const

Extracts and returns the format from the duration message.

Applications should always use a query to retrieve the duration of a pipeline.

MT safe.

Returns: The format.

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

gstreamermm/message.h

gstreamermm: Gst::MessageDuration Class Reference

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation