A seek event. More...

#include <gstreamermm/event.h>

Inheritance diagram for Gst::EventSeek:

Public Member Functions
void	parse (double& rate, Format& format, SeekFlags& flags, SeekType& start_type, gint64&start, SeekType& stop_type, gint64& stop) const
	Parses a seek event and stores the results in the given result locations. More...

gint64	parse_start () const
	Parses the start of a seek event. More...

double	parse_rate () const
	Parses the rate of a seek event. More...

Format	parse_format () const
	Parses the format of a seek event. More...

SeekFlags	parse_flags () const
	Parses the flags of a seek event. More...

SeekType	parse_start_type () const
	Parses the start type of a seek event. More...

SeekType	parse_stop_type () const
	Parses the stop type of a seek event. More...

gint64	parse_stop () const
	Parses the stop of a seek event. More...

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

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

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

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

GstEvent*	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...

	Event ()=delete

	Event (const Event&)=delete

Event&	operator= (const Event&)=delete

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

bool	has_name (const Glib::ustring& name) const
	Checks if event has the given name. More...

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

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

gint64	get_running_time_offset () const
	Retrieve the accumulated running time offset of the event. More...

void	set_running_time_offset (gint64 offset)
	Set the running time offset of a event. More...

Glib::RefPtr< Gst::Event >	copy () const
	Copy the event using the event specific copy function. More...

Glib::RefPtr< Gst::Event >	create_writable ()
	Makes a writable event from the given event. More...

bool	is_downstream () const
	Check if an event can travel downstream. More...

bool	is_serialized () const
	Check if an event is serialized with the data stream. More...

bool	is_upstream () const
	Check if an event can travel upstream. More...

EventType	get_event_type () const
	Get the Gst::EventType of the event. More...

Gst::ClockTime	get_timestamp () const
	Get the Gst::ClockTime timestamp of the event. More...

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 ()=delete

	MiniObject (const MiniObject&)=delete

MiniObject&	operator= (const MiniObject&)=delete

	~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::EventSeek >	create (double rate, Format format, SeekFlags flags, SeekType start_type, gint64 start, SeekType stop_type, gint64 stop)
	Allocate a new seek event with the given parameters. More...

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

Protected Member Functions inherited from Gst::Event
void	operator delete (void*, std::size_t)

Protected Member Functions inherited from Gst::MiniObject
void	operator delete (void*, std::size_t)

Related Functions inherited from Gst::Event
Glib::RefPtr< Gst::Event >	wrap (GstEvent* 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 seek event.

See create() for more details.

Member Function Documentation

◆ create()

static Glib::RefPtr<Gst::EventSeek> Gst::EventSeek::create	(	double	rate,
		Format	format,
		SeekFlags	flags,
		SeekType	start_type,
		gint64	start,
		SeekType	stop_type,
		gint64	stop
	)

static

Allocate a new seek event with the given parameters.

The seek event configures playback of the pipeline between start to stop at the speed given in rate, also called a playback segment. The start and stop values are expressed in format.

A rate of 1.0 means normal playback rate, 2.0 means double speed. Negatives values means backwards playback. A value of 0.0 for the rate is not allowed and should be accomplished instead by PAUSING the pipeline.

A pipeline has a default playback segment configured with a start position of 0, a stop position of -1 and a rate of 1.0. The currently configured playback segment can be queried with Gst::QUERY_SEGMENT.

start_type and stop_type specify how to adjust the currently configured start and stop fields in playback segment. Adjustments can be made relative or absolute to the last configured values. A type of Gst::SEEK_TYPE_NONE means that the position should not be updated.

When the rate is positive and start has been updated, playback will start from the newly configured start position.

For negative rates, playback will start from the newly configured stop position (if any). If the stop position is updated, it must be different from -1 (Gst::CLOCK_TIME_NONE) for negative rates.

It is not possible to seek relative to the current playback position, to do this, PAUSE the pipeline, query the current playback position with Gst::QUERY_POSITION and update the playback segment current position with a Gst::SEEK_TYPE_SET to the desired position.

Parameters

rate	The new playback rate.
format	The format of the seek values.
flags	The optional seek flags.
start_type	The type and flags for the new start position.
start	The value of the new start position.
stop_type	The type and flags for the new stop position.
stop	The value of the new stop position.

Returns: A new seek event.

◆ parse()

void Gst::EventSeek::parse	(	double &	rate,
		Format&	format,
		SeekFlags&	flags,
		SeekType&	start_type,
		gint64 &	start,
		SeekType&	stop_type,
		gint64 &	stop
	)		const

Parses a seek event and stores the results in the given result locations.

Parameters

rate	Result location for the rate.
format	Result location for the stream format.
flags	Result location for the Gst::SeekFlags.
start_type	Result location for the Gst::SeekType of the start position.
start	Result location for the start postion expressed in format.
stop_type	Result location for the Gst::SeekType of the stop position.
stop	Result location for the stop postion expressed in format.

◆ parse_flags()

SeekFlags Gst::EventSeek::parse_flags ( ) const

Parses the flags of a seek event.

Returns: The flags.

◆ parse_format()

Format Gst::EventSeek::parse_format ( ) const

Parses the format of a seek event.

Returns: The format.

◆ parse_rate()

double Gst::EventSeek::parse_rate ( ) const

Parses the rate of a seek event.

Returns: The rate.

◆ parse_start()

gint64 Gst::EventSeek::parse_start ( ) const

Parses the start of a seek event.

Returns: The start.

◆ parse_start_type()

SeekType Gst::EventSeek::parse_start_type ( ) const

Parses the start type of a seek event.

Returns: The start type.

◆ parse_stop()

gint64 Gst::EventSeek::parse_stop ( ) const

Parses the stop of a seek event.

Returns: The stop.

◆ parse_stop_type()

SeekType Gst::EventSeek::parse_stop_type ( ) const

Parses the stop type of a seek event.

Returns: The stop type.

Public Member Functions

Static Public Member Functions

Additional Inherited Members