Enum gstreamer::TagMergeMode[][src]

#[non_exhaustive]
pub enum TagMergeMode {
    Undefined,
    ReplaceAll,
    Replace,
    Append,
    Prepend,
    Keep,
    KeepAll,
    Count,
    // some variants omitted
}

The different tag merging modes are basically replace, overwrite and append, but they can be seen from two directions. Given two taglists: (A) the tags already in the element and (B) the ones that are supplied to the element ( e.g. via [crate::TagSetter::merge_tags()] / [crate::TagSetter::add_tags()] or a crate::EventType::Tag), how are these tags merged? In the table below this is shown for the cases that a tag exists in the list (A) or does not exists (!A) and combinations thereof.

merge modeA + BA + !B!A + B!A + !B
REPLACE_ALLBøBø
REPLACEBABø
APPENDA, BABø
PREPENDB, AABø
KEEPAABø
KEEP_ALLAAøø

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
Undefined

undefined merge mode

ReplaceAll

replace all tags (clear list and append)

Replace

replace tags

Append

append tags

Prepend

prepend tags

Keep

keep existing tags

KeepAll

keep all existing tags

Count

the number of merge modes

Trait Implementations

impl Clone for TagMergeMode[src]

fn clone(&self) -> TagMergeMode[src]

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

impl Debug for TagMergeMode[src]

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

Formats the value using the given formatter. Read more

impl<'a> FromValue<'a> for TagMergeMode[src]

type Checker = GenericValueTypeChecker<Self>

Value type checker.

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

Get the contained value from a Value. Read more

impl Hash for TagMergeMode[src]

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

Feeds this value into the given Hasher. Read more

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 Ord for TagMergeMode[src]

fn cmp(&self, other: &TagMergeMode) -> Ordering[src]

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

#[must_use]
fn max(self, other: Self) -> Self
1.21.0[src]

Compares and returns the maximum of two values. Read more

#[must_use]
fn min(self, other: Self) -> Self
1.21.0[src]

Compares and returns the minimum of two values. Read more

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

Restrict a value to a certain interval. Read more

impl PartialEq<TagMergeMode> for TagMergeMode[src]

fn eq(&self, other: &TagMergeMode) -> bool[src]

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

fn ne(&self, other: &TagMergeMode) -> bool[src]

This method tests for !=.

impl PartialOrd<TagMergeMode> for TagMergeMode[src]

fn partial_cmp(&self, other: &TagMergeMode) -> Option<Ordering>[src]

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

#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[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) -> bool
1.0.0[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) -> bool
1.0.0[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) -> bool
1.0.0[src]

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

impl StaticType for TagMergeMode[src]

fn static_type() -> Type[src]

Returns the type identifier of Self.

impl ToValue for TagMergeMode[src]

fn to_value(&self) -> Value[src]

Convert a value to a Value.

fn value_type(&self) -> Type[src]

Returns the type identifer of self. Read more

impl ValueType for TagMergeMode[src]

type Type = Self

Type to get the Type from. Read more

impl Copy for TagMergeMode[src]

impl Eq for TagMergeMode[src]

impl StructuralEq for TagMergeMode[src]

impl StructuralPartialEq for TagMergeMode[src]

Auto Trait Implementations

impl RefUnwindSafe for TagMergeMode

impl Send for TagMergeMode

impl Sync for TagMergeMode

impl Unpin for TagMergeMode

impl UnwindSafe for TagMergeMode

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

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

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

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

pub fn from(t: T) -> T[src]

Performs the conversion.

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

pub fn into(self) -> U[src]

Performs the conversion.

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

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

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

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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

pub fn to_send_value(&self) -> SendValue[src]

Returns a SendValue clone of self.

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.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

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.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.