A default clock that uses the current system time. More...

#include <gstreamermm/systemclock.h>

Inheritance diagram for Gst::SystemClock:

[legend]

Public Member Functions
	SystemClock (SystemClock&& src) noexcept

SystemClock&	operator= (SystemClock&& src) noexcept

	~SystemClock () noexcept override

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

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

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

Public Member Functions inherited from Gst::Clock
	Clock (Clock&& src) noexcept

Clock&	operator= (Clock&& src) noexcept

	~Clock () noexcept override

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

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

GstClock*	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	add_observation (Gst::ClockTime slave_time, Gst::ClockTime master_time, gdouble& result)
	The time master_time of the master clock and the time slave_time of the slave clock are added to the list of observations. More...

bool	add_observation (Gst::ClockTime slave_time, Gst::ClockTime master_time, gdouble& result, Gst::ClockTime&internal, Gst::ClockTime& external, Gst::ClockTime& rate_num, Gst::ClockTime& rate_denom)
	Add a clock observation to the internal slaving algorithm the same as add_observation(), and return the result of the master clock estimation, without updating the internal calibration. More...

bool	set_master (const Clock& master_clock)
	Set master_clock as the master clock for clock. More...

Glib::RefPtr< Gst::Clock >	get_master ()
	Get the master clock that clock is slaved to or `nullptr` when the clock is not slaved to any master clock. More...

Glib::RefPtr< const Gst::Clock >	get_master () const
	Get the master clock that clock is slaved to or `nullptr` when the clock is not slaved to any master clock. More...

Gst::ClockTime	set_resolution (Gst::ClockTime resolution)
	Set the accuracy of the clock. More...

Gst::ClockTime	get_resolution () const
	Get the accuracy of the clock. More...

Gst::ClockTime	get_time () const
	Gets the current time of the given clock. More...

Glib::RefPtr< Gst::ClockID >	create_single_shot_id (Gst::ClockTime time)
	Get a Gst::ClockID from clock to trigger a single shot notification at the requested time. More...

Glib::RefPtr< Gst::ClockID >	create_periodic_id (Gst::ClockTime start_time, Gst::ClockTime intervals)
	Get an ID from clock to trigger a periodic notification. More...

bool	single_shot_id_reinit (const Glib::RefPtr< Gst::ClockID >& id, Gst::ClockTime time)
	Reinitializes the provided single shot id to the provided time. More...

bool	periodic_id_reinit (const Glib::RefPtr< Gst::ClockID >& id, Gst::ClockTime start_time, Gst::ClockTime interval)
	Reinitializes the provided periodic id to the provided start time and interval. More...

Gst::ClockTime	get_internal_time () const
	Gets the current internal time of the given clock. More...

Gst::ClockTime	adjust_unlocked (Gst::ClockTime internal_time)
	Converts the given internal_time clock time to the external time, adjusting for the rate and reference time set with set_calibration() and making sure that the returned time is increasing. More...

Gst::ClockTime	unadjust_unlocked (Gst::ClockTime external_time)
	Converts the given external_time clock time to the internal time of clock, using the rate and reference time set with set_calibration(). More...

Gst::ClockTime	adjust_with_calibration (Gst::ClockTime internal_target, Gst::ClockTime cinternal, Gst::ClockTime cexternal, Gst::ClockTime cnum, Gst::ClockTime cdenom)
	Converts the given internal_target clock time to the external time, using the passed calibration parameters. More...

Gst::ClockTime	unadjust_with_calibration (Gst::ClockTime external_target, Gst::ClockTime cinternal, Gst::ClockTime cexternal, Gst::ClockTime cnum, Gst::ClockTime cdenom)
	Converts the given external_target clock time to the internal time, using the passed calibration parameters. More...

void	get_calibration (Gst::ClockTime&internal, Gst::ClockTime& external, Gst::ClockTime& rate_num, Gst::ClockTime& rate_denom) const
	Gets the internal rate and reference time of clock. More...

void	set_calibration (Gst::ClockTime internal, Gst::ClockTime external, Gst::ClockTime rate_num, Gst::ClockTime rate_denom)
	Adjusts the rate and time of clock. More...

bool	wait_for_sync (Gst::ClockTime timeout)
	Waits until clock is synced for reporting the current time. More...

bool	is_synced () const
	Checks if the clock is currently synced. More...

void	set_synced (bool synced)
	Sets clock to synced and emits the GstClock::synced signal, and wakes up any thread waiting in wait_for_sync(). More...

Glib::PropertyProxy< guint64 >	property_timeout ()
	get/set timeout can be achieved through 'timeout' property, so wrapping gst_clock_{get\|set\|_timeout is unnecessary. More...

Glib::PropertyProxy_ReadOnly< guint64 >	property_timeout () const
	The amount of time, in nanoseconds, to sample master and slave clocks. More...

Glib::PropertyProxy< int >	property_window_size ()
	The size of the window used to calculate rate and offset. More...

Glib::PropertyProxy_ReadOnly< int >	property_window_size () const
	The size of the window used to calculate rate and offset. More...

Glib::PropertyProxy< int >	property_window_threshold ()
	The threshold to start calculating rate and offset. More...

Glib::PropertyProxy_ReadOnly< int >	property_window_threshold () const
	The threshold to start calculating rate and offset. More...

virtual Gst::ClockTime	change_resolution_vfunc (Gst::ClockTime old_resolution, Gst::ClockTime new_resolution)
	Change the resolution of the clock. More...

virtual Gst::ClockTime	get_resolution_vfunc () const
	Get the resolution of the clock. More...

virtual Gst::ClockTime	get_internal_time_vfunc () const
	Get the internal unadjusted time of the clock. More...

virtual ClockReturn	wait_vfunc (const Glib::RefPtr< Gst::ClockID >& id, Gst::ClockTimeDiff& jitter)
	Perform a blocking wait for the given Gst::ClockID. More...

virtual ClockReturn	wait_async_vfunc (const Glib::RefPtr< Gst::ClockID >& id)
	Perform an asynchronous wait for the given Gst::ClockID. More...

virtual void	unschedule_vfunc (const Glib::RefPtr< Gst::ClockID >& id)
	Unblock a blocking or async wait operation. More...

Glib::SignalProxy< void, bool >	signal_synced ()

Public Member Functions inherited from Gst::Object
	Object (Object&& src) noexcept

Object&	operator= (Object&& src) noexcept

	~Object () noexcept override

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 `nullptr`). 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...

void	set_control_rate (Gst::ClockTime control_rate)
	Change the control-rate for this object. More...

Gst::ClockTime	get_control_rate () const
	Obtain the control-rate for this object. More...

Gst::ClockTime	suggest_next_sync () const
	Returns a suggestion for timestamps where buffers should be split to get best controller results. More...

bool	sync_values (Gst::ClockTime timestamp)
	Sets the properties of the object, according to the Gst::ControlSources that (maybe) handle them and for the given timestamp. More...

void	set_control_bindings_disabled (bool disabled)
	This function is used to disable all controlled properties of the object for some time, i.e. sync_values() will do nothing. More...

bool	has_asctive_control_bindings () const
	Check if the object has an active controlled properties. 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...

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

bool	has_as_parent (const Glib::RefPtr< Gst::Object >& parent) const
	Check if parent is the parent of object. 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::PropertyProxy< Glib::RefPtr< Gst::Object > >	property_parent ()
	The parent of the object. More...

Glib::PropertyProxy_ReadOnly< Glib::RefPtr< Gst::Object > >	property_parent () const
	The parent of the object. More...

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

int	get_refcount () const

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< Gst::Clock >	obtain ()
	Get a handle to the default system clock. More...

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

Protected Member Functions inherited from Gst::Object
virtual void	on_deep_notify (const Glib::RefPtr< Gst::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::SystemClock >	wrap (GstSystemClock* object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Related Functions inherited from Gst::Clock
Glib::RefPtr< Gst::Clock >	wrap (GstClock* 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 default clock that uses the current system time.

The GStreamer core provides a Gst::SystemClock based on the system time. Asynchronous callbacks are scheduled from an internal thread.

Gst::Clock implementors are encouraged to subclass this systemclock as it implements the async notification.

Subclasses can however override all of the important methods for sync and async notifications to implement their own callback methods or blocking wait operations.

Last reviewed on 2006-03-08 (0.10.4)

Constructor & Destructor Documentation

◆ SystemClock() [1/2]

Gst::SystemClock::SystemClock ( SystemClock&& src )

noexcept

◆ ~SystemClock()

Gst::SystemClock::~SystemClock ( )

overridenoexcept

◆ SystemClock() [2/2]

Gst::SystemClock::SystemClock ( )

protected

Member Function Documentation

◆ get_type()

static GType Gst::SystemClock::get_type ( )

static

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

◆ gobj() [1/2]

GstSystemClock* Gst::SystemClock::gobj ( )

inline

Provides access to the underlying C GObject.

◆ gobj() [2/2]

const GstSystemClock* Gst::SystemClock::gobj ( ) const

inline

Provides access to the underlying C GObject.

◆ gobj_copy()

GstSystemClock* Gst::SystemClock::gobj_copy ( )

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

◆ obtain()

static Glib::RefPtr<Gst::Clock> Gst::SystemClock::obtain ( )

static

Get a handle to the default system clock.

The refcount of the clock will be increased so you need to unref the clock after usage.

Returns: The default clock.

MT safe.

◆ operator=()

SystemClock& Gst::SystemClock::operator= ( SystemClock&& src )

noexcept

Friends And Related Function Documentation

◆ wrap()

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

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.

Public Member Functions

Static Public Member Functions

Protected Member Functions

Related Functions