#[non_exhaustive]pub enum DolbyVisionMapping {
Hdr101000,
Hdr10Nomap,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against DolbyVisionMapping
, it is important to ensure
your code is forward-compatible. That is, if a match arm handles a case for a
feature that is supported by the service but has not been represented as an enum
variant in a current version of SDK, your code should continue to work when you
upgrade SDK to a future version in which the enum does include a variant for that
feature.
Here is an example of how you can make a match expression forward-compatible:
# let dolbyvisionmapping = unimplemented!();
match dolbyvisionmapping {
DolbyVisionMapping::Hdr101000 => { /* ... */ },
DolbyVisionMapping::Hdr10Nomap => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when dolbyvisionmapping
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant DolbyVisionMapping::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
DolbyVisionMapping::Unknown(UnknownVariantValue("NewFeature".to_owned()))
and calling as_str
on it yields "NewFeature"
.
This match expression is forward-compatible when executed with a newer
version of SDK where the variant DolbyVisionMapping::NewFeature
is defined.
Specifically, when dolbyvisionmapping
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on DolbyVisionMapping::NewFeature
also yielding "NewFeature"
.
Explicitly matching on the Unknown
variant should
be avoided for two reasons:
- The inner data
UnknownVariantValue
is opaque, and no further information can be extracted. - It might inadvertently shadow other intended match arms. Required when you set Dolby Vision Profile to Profile 8.1. When you set Content mapping to None, content mapping is not applied to the HDR10-compatible signal. Depending on the source peak nit level, clipping might occur on HDR devices without Dolby Vision. When you set Content mapping to HDR10 1000, the transcoder creates a 1,000 nits peak HDR10-compatible signal by applying static content mapping to the source. This mode is speed-optimized for PQ10 sources with metadata that is created from analysis. For graded Dolby Vision content, be aware that creative intent might not be guaranteed with extreme 1,000 nits trims.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Hdr101000
Hdr10Nomap
Unknown(UnknownVariantValue)
Unknown
. See the docs on this enum for the correct way to handle unknown variants.Unknown
contains new variants that have been added since this code was generated.
Implementations§
source§impl DolbyVisionMapping
impl DolbyVisionMapping
sourcepub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
pub fn try_parse(value: &str) -> Result<Self, UnknownVariantError>
Parses the enum value while disallowing unknown variants.
Unknown variants will result in an error.
Trait Implementations§
source§impl AsRef<str> for DolbyVisionMapping
impl AsRef<str> for DolbyVisionMapping
source§impl Clone for DolbyVisionMapping
impl Clone for DolbyVisionMapping
source§fn clone(&self) -> DolbyVisionMapping
fn clone(&self) -> DolbyVisionMapping
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DolbyVisionMapping
impl Debug for DolbyVisionMapping
source§impl Display for DolbyVisionMapping
impl Display for DolbyVisionMapping
source§impl From<&str> for DolbyVisionMapping
impl From<&str> for DolbyVisionMapping
source§impl FromStr for DolbyVisionMapping
impl FromStr for DolbyVisionMapping
source§impl Hash for DolbyVisionMapping
impl Hash for DolbyVisionMapping
source§impl Ord for DolbyVisionMapping
impl Ord for DolbyVisionMapping
source§fn cmp(&self, other: &DolbyVisionMapping) -> Ordering
fn cmp(&self, other: &DolbyVisionMapping) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
source§impl PartialEq for DolbyVisionMapping
impl PartialEq for DolbyVisionMapping
source§fn eq(&self, other: &DolbyVisionMapping) -> bool
fn eq(&self, other: &DolbyVisionMapping) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for DolbyVisionMapping
impl PartialOrd for DolbyVisionMapping
source§fn partial_cmp(&self, other: &DolbyVisionMapping) -> Option<Ordering>
fn partial_cmp(&self, other: &DolbyVisionMapping) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Eq for DolbyVisionMapping
impl StructuralPartialEq for DolbyVisionMapping
Auto Trait Implementations§
impl Freeze for DolbyVisionMapping
impl RefUnwindSafe for DolbyVisionMapping
impl Send for DolbyVisionMapping
impl Sync for DolbyVisionMapping
impl Unpin for DolbyVisionMapping
impl UnwindSafe for DolbyVisionMapping
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more