#[non_exhaustive]pub enum H264AdaptiveQuantization {
Auto,
High,
Higher,
Low,
Max,
Medium,
Off,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against H264AdaptiveQuantization
, 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 h264adaptivequantization = unimplemented!();
match h264adaptivequantization {
H264AdaptiveQuantization::Auto => { /* ... */ },
H264AdaptiveQuantization::High => { /* ... */ },
H264AdaptiveQuantization::Higher => { /* ... */ },
H264AdaptiveQuantization::Low => { /* ... */ },
H264AdaptiveQuantization::Max => { /* ... */ },
H264AdaptiveQuantization::Medium => { /* ... */ },
H264AdaptiveQuantization::Off => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when h264adaptivequantization
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant H264AdaptiveQuantization::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
H264AdaptiveQuantization::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 H264AdaptiveQuantization::NewFeature
is defined.
Specifically, when h264adaptivequantization
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on H264AdaptiveQuantization::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. Keep the default value, Auto, for this setting to have MediaConvert automatically apply the best types of quantization for your video content. When you want to apply your quantization settings manually, you must set H264AdaptiveQuantization to a value other than Auto. Use this setting to specify the strength of any adaptive quantization filters that you enable. If you don’t want MediaConvert to do any adaptive quantization in this transcode, set Adaptive quantization to Off. Related settings: The value that you choose here applies to the following settings: H264FlickerAdaptiveQuantization, H264SpatialAdaptiveQuantization, and H264TemporalAdaptiveQuantization.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Auto
High
Higher
Low
Max
Medium
Off
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 H264AdaptiveQuantization
impl H264AdaptiveQuantization
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 H264AdaptiveQuantization
impl AsRef<str> for H264AdaptiveQuantization
source§impl Clone for H264AdaptiveQuantization
impl Clone for H264AdaptiveQuantization
source§fn clone(&self) -> H264AdaptiveQuantization
fn clone(&self) -> H264AdaptiveQuantization
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for H264AdaptiveQuantization
impl Debug for H264AdaptiveQuantization
source§impl Display for H264AdaptiveQuantization
impl Display for H264AdaptiveQuantization
source§impl From<&str> for H264AdaptiveQuantization
impl From<&str> for H264AdaptiveQuantization
source§impl FromStr for H264AdaptiveQuantization
impl FromStr for H264AdaptiveQuantization
source§impl Hash for H264AdaptiveQuantization
impl Hash for H264AdaptiveQuantization
source§impl Ord for H264AdaptiveQuantization
impl Ord for H264AdaptiveQuantization
source§fn cmp(&self, other: &H264AdaptiveQuantization) -> Ordering
fn cmp(&self, other: &H264AdaptiveQuantization) -> 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 H264AdaptiveQuantization
impl PartialEq for H264AdaptiveQuantization
source§fn eq(&self, other: &H264AdaptiveQuantization) -> bool
fn eq(&self, other: &H264AdaptiveQuantization) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for H264AdaptiveQuantization
impl PartialOrd for H264AdaptiveQuantization
source§fn partial_cmp(&self, other: &H264AdaptiveQuantization) -> Option<Ordering>
fn partial_cmp(&self, other: &H264AdaptiveQuantization) -> 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 H264AdaptiveQuantization
impl StructuralPartialEq for H264AdaptiveQuantization
Auto Trait Implementations§
impl Freeze for H264AdaptiveQuantization
impl RefUnwindSafe for H264AdaptiveQuantization
impl Send for H264AdaptiveQuantization
impl Sync for H264AdaptiveQuantization
impl Unpin for H264AdaptiveQuantization
impl UnwindSafe for H264AdaptiveQuantization
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