[]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]

pub fn new_no_target(name: Option<&str>, dir: PadDirection) -> Option<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.

pub fn new_no_target_from_template(
    name: Option<&str>,
    templ: &PadTemplate
) -> Option<GhostPad>
[src]

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]

pub fn new<Q: IsA<Pad>>(name: Option<&str>, target: &Q) -> Option<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.

pub fn new_from_template<Q: IsA<Pad>>(
    name: Option<&str>,
    target: &Q,
    templ: &PadTemplate
) -> Option<GhostPad>
[src]

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.

pub fn activate_mode_default<P: IsA<GhostPad>, Q: IsA<Object>>(
    pad: &P,
    parent: Option<&Q>,
    mode: PadMode,
    active: bool
) -> Result<(), BoolError>
[src]

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.

pub fn internal_activate_mode_default<P: IsA<GhostPad>, Q: IsA<Object>>(
    pad: &P,
    parent: Option<&Q>,
    mode: PadMode,
    active: bool
) -> Result<(), BoolError>
[src]

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

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Eq for GhostPad

impl Ord for GhostPad

fn max(self, other: Self) -> Self1.21.0[src]

Compares and returns the maximum of two values. Read more

fn min(self, other: Self) -> Self1.21.0[src]

Compares and returns the minimum of two values. Read more

fn clamp(self, min: Self, max: Self) -> Self[src]

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval. Read more

impl Sync for GhostPad[src]

impl Send for GhostPad[src]

impl<T: ObjectType> PartialEq<T> for GhostPad

#[must_use] fn ne(&self, other: &Rhs) -> bool1.0.0[src]

This method tests for !=.

impl<T: ObjectType> PartialOrd<T> for GhostPad

#[must_use] fn lt(&self, other: &Rhs) -> bool1.0.0[src]

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

#[must_use] fn le(&self, other: &Rhs) -> bool1.0.0[src]

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

#[must_use] fn gt(&self, other: &Rhs) -> bool1.0.0[src]

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

#[must_use] fn ge(&self, other: &Rhs) -> bool1.0.0[src]

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

impl Debug for GhostPad

impl Hash for GhostPad

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher
1.3.0[src]

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

impl IsA<ProxyPad> for GhostPad

impl IsA<Pad> for GhostPad

impl IsA<Object> for GhostPad

impl StaticType for GhostPad

Blanket Implementations

impl<T> From<T> for T[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<'a, T> ToGlibContainerFromSlice<'a, *mut GList> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 
[src]

impl<'a, T> ToGlibContainerFromSlice<'a, *mut GArray> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 
[src]

impl<'a, T> ToGlibContainerFromSlice<'a, *const GList> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 
[src]

impl<T> Cast for T where
    T: ObjectType
[src]

fn upcast<T>(self) -> T where
    Self: IsA<T>,
    T: ObjectType
[src]

Upcasts an object to a superclass or interface T. Read more

fn upcast_ref<T>(&self) -> &T where
    Self: IsA<T>,
    T: ObjectType
[src]

Upcasts an object to a reference of its superclass or interface T. Read more

fn downcast<T>(self) -> Result<T, Self> where
    Self: CanDowncast<T>,
    T: ObjectType
[src]

Tries to downcast to a subclass or interface implementor T. Read more

fn downcast_ref<T>(&self) -> Option<&T> where
    Self: CanDowncast<T>,
    T: ObjectType
[src]

Tries to downcast to a reference of its subclass or interface implementor T. Read more

fn dynamic_cast<T>(self) -> Result<T, Self> where
    T: ObjectType
[src]

Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

fn dynamic_cast_ref<T>(&self) -> Option<&T> where
    T: ObjectType
[src]

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

unsafe fn unsafe_cast<T>(self) -> T where
    T: ObjectType
[src]

Casts to T unconditionally. Read more

unsafe fn unsafe_cast_ref<T>(&self) -> &T where
    T: ObjectType
[src]

Casts to &T unconditionally. Read more

impl<Super, Sub> CanDowncast<Sub> for Super where
    Sub: IsA<Super>,
    Super: IsA<Super>, 
[src]

impl<T> ObjectExt for T where
    T: ObjectType
[src]

impl<T> ToValue for T where
    T: SetValue + ?Sized
[src]

impl<T> ToSendValue for T where
    T: ToValue + SetValue + Send + ?Sized
[src]