Struct gstreamer_editing_services::Layer

pub struct Layer { /* private fields */ }

Layer-s are responsible for collecting and ordering Clip-s.

A layer within a timeline will have an associated priority, corresponding to their index within the timeline. A layer with the index/priority 0 will have the highest priority and the layer with the largest index will have the lowest priority (the order of priorities, in this sense, is the reverse of the numerical ordering of the indices). TimelineExt::move_layer() should be used if you wish to change how layers are prioritised in a timeline.

Layers with higher priorities will have their content priorities over content from lower priority layers, similar to how layers are used in image editing. For example, if two separate layers both display video content, then the layer with the higher priority will have its images shown first. The other layer will only have its image shown if the higher priority layer has no content at the given playtime, or is transparent in some way. Audio content in separate layers will simply play in addition.

Properties

auto-transition

Whether to automatically create a TransitionClip whenever two Source-s that both belong to a Clip in the layer overlap. See Timeline for what counts as an overlap.

When a layer is added to a Timeline, if this property is left as false, but the timeline’s auto-transition is true, it will be set to true as well.

Readable | Writeable

priority

The priority of the layer in the Timeline. 0 is the highest priority. Conceptually, a timeline is a stack of layers, and the priority of the layer represents its position in the stack. Two layers should not have the same priority within a given GESTimeline.

Note that the timeline needs to be committed (with ges_timeline_commit) for the change to be taken into account.

Readable | Writeable

Signals

active-changed

Will be emitted whenever the layer is activated or deactivated for some Track. See LayerExt::set_active_for_tracks().

clip-added

Will be emitted after the clip is added to the layer.

clip-removed

Will be emitted after the clip is removed from the layer.

MetaContainer

notify-meta

This is emitted for a meta container whenever the metadata under one of its fields changes, is set for the first time, or is removed. In the latter case, value will be None.

Detailed

Implements

LayerExt, [trait@glib::ObjectExt], ExtractableExt, MetaContainerExt

Implementations

impl Layer

pub const NONE: Option<&'static Layer> = None

pub fn new() -> Layer

Creates a new layer.

Returns

A new layer.

Trait Implementations

impl Clone for Layer

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Layer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Layer

fn default() -> Self

Returns the “default value” for a type.

impl HasParamSpec for Layer

type ParamSpec = ParamSpecObject

type SetValue = Layer

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, Layer>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for Layer

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Layer

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl ParentClassIs for Layer

type Parent = Object

impl<OT: ObjectType> PartialEq<OT> for Layer

fn eq(&self, other: &OT) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for Layer

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

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

fn lt(&self, other: &Rhs) -> bool

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

fn le(&self, other: &Rhs) -> bool

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

fn gt(&self, other: &Rhs) -> bool

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

fn ge(&self, other: &Rhs) -> bool

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

impl StaticType for Layer

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for Layer

impl IsA<Extractable> for Layer

impl IsA<MetaContainer> for Layer