Enum Output 

#[non_exhaustive]
pub enum Output {
    Native,
    Cpu,
}

The representation a decoder or scaler hands frames back in.

A choice, not a promise of GPU residency. Native lets a hardware backend keep its picture where it made it, which on a software backend is CPU memory anyway. Cpu is the portable exit: the result is always Surface::I420, downloaded when it had to be. #[non_exhaustive] so a narrower choice (a specific device, a shareable handle) can be added without breaking a match.

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.

Native

The backend’s natural representation: a GPU surface from a hardware decoder or scaler, CPU pixels from a software one. The default, since it never pays for a download nobody asked for. Match on each Surface rather than assuming either.

Cpu

CPU-resident I420, whatever produced it. A hardware decode pays a download per picture; a backend that can decode straight to system memory does that instead.

Trait Implementations

impl Clone for Output

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Output

impl Debug for Output

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

Formats the value using the given formatter.

impl Default for Output

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Output

impl PartialEq for Output

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Output