Struct gstreamer::GhostPad[]

pub struct GhostPad(_, _);

GhostPads are useful when organizing pipelines with Bin 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 Element. 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, GhostPad::new is the function to use to get a ghost-pad. Otherwise one can use GhostPad::new_no_target to create the ghost-pad and use GhostPadExt::set_target to establish the association later on.

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

Implements

GhostPadExt, ProxyPadExt, PadExt, GstObjectExt, glib::object::ObjectExt

Methods

impl GhostPad
[src]

Create a new ghostpad without a target with the given direction. A target can be set on the ghostpad later with the GhostPadExt::set_target function.

The created ghostpad will not have a padtemplate.

name

the name of the new pad, or None to assign a default name.

dir

the direction of the ghostpad

Returns

a new Pad, or None in case of an error.

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

name

the name of the new pad, or None to assign a default name

templ

the PadTemplate to create the ghostpad from.

Returns

a new Pad, or None in case of an error.

impl GhostPad
[src]

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.

name

the name of the new pad, or None to assign a default name

target

the pad to ghost.

Returns

a new Pad, or None in case of an error.

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.

name

the name of the new pad, or None to assign a default name.

target

the pad to ghost.

templ

the PadTemplate to use on the ghostpad.

Returns

a new Pad, or None in case of an error.

Invoke the default activate mode function of a ghost pad.

pad

the Pad to activate or deactivate.

parent

the parent of pad or None

mode

the requested activation mode

active

whether the pad should be active or not.

Returns

true if the operation was successful.

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

pad

the Pad to activate or deactivate.

parent

the parent of pad or None

mode

the requested activation mode

active

whether the pad should be active or not.

Returns

true if the operation was successful.

Trait Implementations

impl Clone for GhostPad

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl Hash for GhostPad

Feeds this value into the given [Hasher]. Read more

Feeds a slice of this type into the given [Hasher]. Read more

impl Ord for GhostPad

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

impl StaticType for GhostPad

Returns the type identifier of Self.

impl<T: IsA<Object>> PartialEq<T> for GhostPad

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

impl Eq for GhostPad

impl<T: IsA<Object>> PartialOrd<T> for GhostPad

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl Debug for GhostPad

Formats the value using the given formatter. Read more

impl IsA<ProxyPad> for GhostPad

impl IsA<Pad> for GhostPad

impl IsA<Object> for GhostPad

impl IsA<Object> for GhostPad

impl Send for GhostPad
[src]

impl Sync for GhostPad
[src]