Package org.freedesktop.gstreamer.gst

Class GhostPad

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeInstance

org.gnome.gobject.GObject

org.gnome.gobject.InitiallyUnowned

org.freedesktop.gstreamer.gst.GstObject

org.freedesktop.gstreamer.gst.Pad

org.freedesktop.gstreamer.gst.ProxyPad

org.freedesktop.gstreamer.gst.GhostPad

All Implemented Interfaces:

Proxy

@Generated("io.github.jwharm.JavaGI")
public class GhostPad
extends ProxyPad

GhostPads are useful when organizing pipelines with GstBin like elements. The idea here is to create hierarchical element graphs. The bin element contains a sub-graph. Now one would like to treat the bin-element like any other GstElement. This is where GhostPads come into play. A GhostPad acts as a proxy for another pad. Thus the bin can have sink and source ghost-pads that are associated with sink and source pads of the child elements.

If the target pad is known at creation time, gst_ghost_pad_new() is the function to use to get a ghost-pad. Otherwise one can use gst_ghost_pad_new_no_target() to create the ghost-pad and use gst_ghost_pad_set_target() to establish the association later on.

Note that GhostPads add overhead to the data processing of a pipeline.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	GhostPad.Builder<B extends GhostPad.Builder<B>>	Inner class implementing a builder pattern to construct a GObject with properties.
static class	GhostPad.GhostPadClass

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.gst.ProxyPad

ProxyPad.ProxyPadClass

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.gst.Pad

Pad.LinkedCallback, Pad.PadClass, Pad.UnlinkedCallback

Nested classes/interfaces inherited from class org.freedesktop.gstreamer.gst.GstObject

GstObject.DeepNotifyCallback, GstObject.Object$Impl, GstObject.ObjectClass

Nested classes/interfaces inherited from class org.gnome.gobject.InitiallyUnowned

InitiallyUnowned.InitiallyUnownedClass

Nested classes/interfaces inherited from class org.gnome.gobject.GObject

GObject.NotifyCallback

Constructor Summary

Constructors

Constructor	Description
GhostPad()	Creates a new GhostPad.
GhostPad(@Nullable String name, Pad target)	Create a new ghostpad with target as the target.
GhostPad(MemorySegment address)	Create a GhostPad proxy instance for the provided memory address.

Method Summary

Modifier and Type	Method	Description
static boolean	activateModeDefault(Pad pad, @Nullable GstObject parent, PadMode mode, boolean active)	Invoke the default activate mode function of a ghost pad.
protected GhostPad	asParent()	Returns this instance as if it were its parent type.
static GhostPad.Builder<? extends GhostPad.Builder>	builder()	A GhostPad.Builder object constructs a GhostPad with the specified properties.
boolean	construct()	Deprecated. This function is deprecated since 1.18 and does nothing anymore.
static Pad	fromTemplate(@Nullable String name, Pad target, PadTemplate templ)	Create a new ghostpad with target as the target.
static MemoryLayout	getMemoryLayout()	The memory layout of the native struct.
@Nullable Pad	getTarget()	Get the target pad of gpad. Unref target pad after usage.
static @Nullable Type	getType()	Get the GType of the GhostPad class
static boolean	internalActivateModeDefault(Pad pad, @Nullable GstObject parent, PadMode mode, boolean active)	Invoke the default activate mode function of a proxy pad that is owned by a ghost pad.
static Pad	noTarget(@Nullable String name, PadDirection dir)	Create a new ghostpad without a target with the given direction.
static Pad	noTargetFromTemplate(@Nullable String name, PadTemplate templ)	Create a new ghostpad based on templ, without setting a target.
boolean	setTarget(@Nullable Pad newtarget)	Set the new target of the ghostpad gpad. Any existing target is unlinked and links to the new target are established.

Methods inherited from class org.freedesktop.gstreamer.gst.ProxyPad

chainDefault, chainListDefault, getInternal, getrangeDefault, iterateInternalLinksDefault

Methods inherited from class org.freedesktop.gstreamer.gst.Pad

activateMode, addProbe, addProbe, canLink, chain, chainList, checkReconfigure, createStreamId, createStreamIdPrintf, emitLinked, emitUnlinked, eventDefault, forward, fromStaticTemplate, fromTemplate, getAllowedCaps, getCurrentCaps, getDirection, getElementPrivate, getLastFlowReturn, getOffset, getPadTemplate, getPadTemplateCaps, getParentElement, getPeer, getRange, getSingleInternalLink, getStickyEvent, getStream, getStreamId, getTaskState, hasCurrentCaps, isActive, isBlocked, isBlocking, isLinked, iterateInternalLinks, iterateInternalLinksDefault, link, linked, linkFull, linkFull, linkGetName, linkMaybeGhosting, linkMaybeGhostingFull, linkMaybeGhostingFull, markReconfigure, needsReconfigure, onLinked, onUnlinked, pauseTask, peerQuery, peerQueryAcceptCaps, peerQueryCaps, peerQueryConvert, peerQueryDuration, peerQueryPosition, proxyQueryAcceptCaps, proxyQueryCaps, pullRange, push, pushEvent, pushList, query, queryAcceptCaps, queryCaps, queryConvert, queryDefault, queryDuration, queryPosition, removeProbe, sendEvent, setActivateFunctionFull, setActivatemodeFunctionFull, setActive, setChainFunctionFull, setChainListFunctionFull, setElementPrivate, setEventFullFunctionFull, setEventFunctionFull, setGetrangeFunctionFull, setIterateInternalLinksFunctionFull, setLinkFunctionFull, setOffset, setQueryFunctionFull, setUnlinkFunctionFull, startTask, stickyEventsForeach, stopTask, storeStickyEvent, unlink, unlinked, useFixedCaps

Methods inherited from class org.freedesktop.gstreamer.gst.GstObject

addControlBinding, checkUniqueness, deepNotify, defaultDeepNotify, defaultError, emitDeepNotify, getControlBinding, getControlRate, getGValueArray, getName, getParent, getPathString, getValue, getValueArray, hasActiveControlBindings, hasAncestor, hasAsAncestor, hasAsParent, onDeepNotify, ref, refSink, removeControlBinding, replace, setControlBindingDisabled, setControlBindingsDisabled, setControlRate, setName, setParent, suggestNextSync, syncValues, unparent, unref

Methods inherited from class org.gnome.gobject.GObject

addToggleRef, addWeakPointer, bindProperty, bindProperty, bindProperty, bindPropertyFull, bindPropertyFull, bindPropertyWithClosures, bindPropertyWithClosures, compatControl, connect, connect, connect, constructed, disconnect, dispatchPropertiesChanged, dispose, dupData, dupQdata, emit, emitNotify, finalize_, forceFloating, freezeNotify, get, getData, getProperty, getProperty, getProperty, getQdata, getv, interfaceFindProperty, interfaceInstallProperty, interfaceListProperties, isFloating, newInstance, newInstance, newv, notify, notify, notifyByPspec, onNotify, refSink, removeToggleRef, removeWeakPointer, replaceData, replaceQdata, runDispose, set, setData, setDataFull, setProperty, setProperty, setProperty, setQdata, setQdataFull, setv, stealData, stealQdata, takeRef, thawNotify, watchClosure, weakRef, weakUnref, withProperties

Methods inherited from class org.gnome.gobject.TypeInstance

callParent, callParent, cast, getPrivate, readGClass, writeGClass

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GhostPad

public GhostPad(MemorySegment address)

Create a GhostPad proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

GhostPad

public GhostPad(@Nullable String name,
 Pad target)

Create a new ghostpad with target as the target. The direction will be taken from the target pad. target must be unlinked.

Will ref the target.

Parameters:

name - the name of the new pad, or null to assign a default name

target - the pad to ghost.

GhostPad

public GhostPad()

Creates a new GhostPad.

Method Details

getType

public static @Nullable Type getType()

Get the GType of the GhostPad class

Returns:

the GType

getMemoryLayout

public static MemoryLayout getMemoryLayout()

The memory layout of the native struct.

Returns:

the memory layout

asParent

protected GhostPad asParent()

Returns this instance as if it were its parent type. This is mostly synonymous to the Java super keyword, but will set the native typeclass function pointers to the parent type. When overriding a native virtual method in Java, "chaining up" with super.methodName() doesn't work, because it invokes the overridden function pointer again. To chain up, call asParent().methodName(). This will call the native function pointer of this virtual method in the typeclass of the parent type.

Overrides:

asParent in class ProxyPad

fromTemplate

public static Pad fromTemplate(@Nullable String name,
 Pad target,
 PadTemplate templ)

Create a new ghostpad with target as the target. The direction will be taken from the target pad. The template used on the ghostpad will be template.

Will ref the target.

Parameters:

name - the name of the new pad, or null to assign a default name.

target - the pad to ghost.

templ - the GstPadTemplate to use on the ghostpad.

Returns:

a new GstPad, or null in case of an error.

noTarget

public static Pad noTarget(@Nullable String name,
 PadDirection dir)

Create a new ghostpad without a target with the given direction. A target can be set on the ghostpad later with the gst_ghost_pad_set_target() function.

The created ghostpad will not have a padtemplate.

Parameters:

name - the name of the new pad, or null to assign a default name.

dir - the direction of the ghostpad

Returns:

a new GstPad, or null in case of an error.

noTargetFromTemplate

public static Pad noTargetFromTemplate(@Nullable String name,
 PadTemplate templ)

Create a new ghostpad based on templ, without setting a target. The direction will be taken from the templ.

Parameters:

name - the name of the new pad, or null to assign a default name

templ - the GstPadTemplate to create the ghostpad from.

Returns:

a new GstPad, or null in case of an error.

activateModeDefault

public static boolean activateModeDefault(Pad pad,
 @Nullable GstObject parent,
 PadMode mode,
 boolean active)

Invoke the default activate mode function of a ghost pad.

Parameters:

pad - the GstPad to activate or deactivate.

parent - the parent of pad or null

mode - the requested activation mode

active - whether the pad should be active or not.

Returns:

true if the operation was successful.

internalActivateModeDefault

public static boolean internalActivateModeDefault(Pad pad,
 @Nullable GstObject parent,
 PadMode mode,
 boolean active)

Invoke the default activate mode function of a proxy pad that is owned by a ghost pad.

Parameters:

pad - the GstPad to activate or deactivate.

parent - the parent of pad or null

mode - the requested activation mode

active - whether the pad should be active or not.

Returns:

true if the operation was successful.

construct

@Deprecated
public boolean construct()

Deprecated.

This function is deprecated since 1.18 and does nothing anymore.

Finish initialization of a newly allocated ghost pad.

This function is most useful in language bindings and when subclassing GstGhostPad; plugin and application developers normally will not call this function. Call this function directly after a call to g_object_new (GST_TYPE_GHOST_PAD, "direction", dir, ..., NULL).

Returns:

true if the construction succeeds, false otherwise.

getTarget

public @Nullable Pad getTarget()

Get the target pad of gpad. Unref target pad after usage.

Returns:

the target GstPad, can be null if the ghostpad has no target set. Unref target pad after usage.

setTarget

public boolean setTarget(@Nullable Pad newtarget)

Set the new target of the ghostpad gpad. Any existing target is unlinked and links to the new target are established. if newtarget is null the target will be cleared.

Parameters:

newtarget - the new pad target

Returns:

true if the new target could be set. This function can return false when the internal pads could not be linked.

builder

public static GhostPad.Builder<? extends GhostPad.Builder> builder()

A GhostPad.Builder object constructs a GhostPad with the specified properties. Use the various set...() methods to set properties, and finish construction with GhostPad.Builder.build().

Returns:

the builder object