Enum gstreamer::TagMergeMode

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 TagSetter::merge_tags / TagSetter::add_tags or a 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 mode`` ``A + B`` ``A + !B`` ``!A + B`` ``!A + !B`` `` `` `` `` ``REPLACE_ALL`` ``B`` ``-`` ``B`` ``-`` `` `` ``REPLACE`` ``B`` ``A`` ``B`` ``-`` `` `` ``APPEND`` ``A, B`` ``A`` ``B`` ``-`` `` `` ``PREPEND`` ``B, A`` ``A`` ``B`` ``-`` `` `` ``KEEP`` ``A`` ``A`` ``B`` ``-`` `` `` ``KEEP_ALL`` ``A`` ``A`` ``-`` ``-`` `` `` `` ``

Variants

UndefinedReplaceAllReplaceAppendPrependKeepKeepAllCount

Trait Implementations

impl Debug for TagMergeMode

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

Formats the value using the given formatter.

impl Eq for TagMergeMode

impl PartialEq for TagMergeMode

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

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

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

This method tests for !=.

impl Ord for TagMergeMode

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

impl PartialOrd for TagMergeMode

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

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

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

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

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

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

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

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

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

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

impl Hash for TagMergeMode

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,

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

impl Clone for TagMergeMode

fn clone(&self) -> TagMergeMode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for TagMergeMode

impl StaticType for TagMergeMode

fn static_type() -> Type

Returns the type identifier of Self.

impl<'a> FromValueOptional<'a> for TagMergeMode

unsafe fn from_value_optional(value: &Value) -> Option<Self>

impl<'a> FromValue<'a> for TagMergeMode

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

impl SetValue for TagMergeMode

unsafe fn set_value(value: &mut Value, this: &Self)