Enum Subsampling 

#[non_exhaustive]
#[repr(u8)]
pub enum Subsampling {
    S444 = 0,
    S422 = 1,
    S420 = 2,
    S411 = 3,
}

Chroma subsampling ratio.

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.

S444 = 0

4:4:4 — no subsampling, full resolution chroma.

S422 = 1

4:2:2 — horizontal half resolution chroma.

S420 = 2

4:2:0 — both horizontal and vertical half resolution chroma.

S411 = 3

4:1:1 — quarter horizontal resolution chroma.

Implementations

impl Subsampling

pub const fn h_factor(self) -> u8

Horizontal subsampling factor (1 = full, 2 = half, 4 = quarter).

pub const fn v_factor(self) -> u8

Vertical subsampling factor (1 = full, 2 = half).

pub const fn from_factors(h: u8, v: u8) -> Option<Subsampling>

Map horizontal and vertical subsampling factors to a named pattern.

Returns None for factor combinations that don’t match a standard subsampling pattern.

Trait Implementations

impl Clone for Subsampling

fn clone(&self) -> Subsampling

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Subsampling

impl Debug for Subsampling

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

Formats the value using the given formatter.

impl Default for Subsampling

fn default() -> Subsampling

Returns the “default value” for a type.

impl Display for Subsampling

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

Formats the value using the given formatter.

impl Eq for Subsampling

impl Hash for Subsampling

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 PartialEq for Subsampling

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Subsampling