Enum gstreamer::StateChangeReturn

#[repr(i32)]
pub enum StateChangeReturn {
    Failure = 0,
    Success = 1,
    Async = 2,
    NoPreroll = 3,
}

The possible return values from a state change function such as ElementExt::set_state(). Only Failure is a real failure.

Variants

Failure = 0

the state change failed

Success = 1

the state change succeeded

Async = 2

the state change will happen asynchronously

NoPreroll = 3

the state change succeeded but the element cannot produce data in State::Paused. This typically happens with live sources.

Implementations

impl StateChangeReturn

pub fn into_result(self) -> Result<StateChangeSuccess, StateChangeError>

pub fn from_error(_: StateChangeError) -> Self

pub fn from_ok(v: StateChangeSuccess) -> Self

Trait Implementations

impl Clone for StateChangeReturn

fn clone(&self) -> StateChangeReturn

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StateChangeReturn

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

Formats the value using the given formatter.

impl From<Result<StateChangeSuccess, StateChangeError>> for StateChangeReturn

fn from(res: Result<StateChangeSuccess, StateChangeError>) -> Self

Converts to this type from the input type.

impl From<StateChangeError> for StateChangeReturn

fn from(value: StateChangeError) -> Self

Converts to this type from the input type.

impl From<StateChangeReturn> for Value

fn from(v: StateChangeReturn) -> Self

Converts to this type from the input type.

impl From<StateChangeSuccess> for StateChangeReturn

fn from(value: StateChangeSuccess) -> Self

Converts to this type from the input type.

impl<'a> FromValue<'a> for StateChangeReturn

type Checker = GenericValueTypeChecker<StateChangeReturn>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl HasParamSpec for StateChangeReturn

type ParamSpec = ParamSpecEnum

type SetValue = StateChangeReturn

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

type BuilderFn = fn(_: &str, _: StateChangeReturn) -> ParamSpecEnumBuilder<'_, StateChangeReturn>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for StateChangeReturn

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

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 StateChangeReturn

fn cmp(&self, other: &StateChangeReturn) -> 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 PartialEq for StateChangeReturn

fn eq(&self, other: &StateChangeReturn) -> 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 PartialOrd for StateChangeReturn

fn partial_cmp(&self, other: &StateChangeReturn) -> 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 StateChangeReturn

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for StateChangeReturn

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifier of self.

impl ValueType for StateChangeReturn

type Type = StateChangeReturn

Type to get the Type from.

impl Copy for StateChangeReturn

impl Eq for StateChangeReturn

impl StructuralPartialEq for StateChangeReturn