Struct gstreamer::ControlSource

pub struct ControlSource { /* private fields */ }

The ControlSource is a base class for control value sources that could be used to get timestamp-value pairs. A control source essentially is a function over time.

A ControlSource is used by first getting an instance of a specific control-source, creating a binding for the control-source to the target property of the element and then adding the binding to the element. The binding will convert the data types and value range to fit to the bound property.

For implementing a new ControlSource one has to implement GstControlSourceGetValue and GstControlSourceGetValueArray functions. These are then used by ControlSourceExt::value() and [ControlSourceExtManual::control_source_get_value_array()][crate::prelude::ControlSourceExtManual::control_source_get_value_array()] to get values for specific timestamps.

This is an Abstract Base Class, you cannot instantiate it.

Implements

ControlSourceExt, GstObjectExt, [trait@glib::ObjectExt], ControlSourceExtManual

GLib type: GObject with reference counted clone semantics.

Implementations

impl ControlSource

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

Trait Implementations

impl Clone for ControlSource

fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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

Performs copy-assignment from source.

impl Debug for ControlSource

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

Formats the value using the given formatter.

impl HasParamSpec for ControlSource

type ParamSpec = ParamSpecObject

type SetValue = ControlSource

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

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

fn param_spec_builder() -> Self::BuilderFn

impl Hash for ControlSource

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

where H: Hasher,

Hashes the memory address of this object.

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 ControlSource

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

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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 ControlSource

type Parent = Object

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

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

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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 ControlSource

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

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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 ControlSource

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for ControlSource

impl IsA<Object> for ControlSource

impl Send for ControlSource

impl Sync for ControlSource