#[non_exhaustive]pub enum H265SpatialAdaptiveQuantization {
Disabled,
Enabled,
Unknown(UnknownVariantValue),
}
Expand description
When writing a match expression against H265SpatialAdaptiveQuantization
, 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 h265spatialadaptivequantization = unimplemented!();
match h265spatialadaptivequantization {
H265SpatialAdaptiveQuantization::Disabled => { /* ... */ },
H265SpatialAdaptiveQuantization::Enabled => { /* ... */ },
other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
_ => { /* ... */ },
}
The above code demonstrates that when h265spatialadaptivequantization
represents
NewFeature
, the execution path will lead to the second last match arm,
even though the enum does not contain a variant H265SpatialAdaptiveQuantization::NewFeature
in the current version of SDK. The reason is that the variable other
,
created by the @
operator, is bound to
H265SpatialAdaptiveQuantization::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 H265SpatialAdaptiveQuantization::NewFeature
is defined.
Specifically, when h265spatialadaptivequantization
represents NewFeature
,
the execution path will hit the second last match arm as before by virtue of
calling as_str
on H265SpatialAdaptiveQuantization::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, Enabled, to adjust quantization within each frame based on spatial variation of content complexity. When you enable this feature, the encoder uses fewer bits on areas that can sustain more distortion with no noticeable visual degradation and uses more bits on areas where any small distortion will be noticeable. For example, complex textured blocks are encoded with fewer bits and smooth textured blocks are encoded with more bits. Enabling this feature will almost always improve your video quality. Note, though, that this feature doesn’t take into account where the viewer’s attention is likely to be. If viewers are likely to be focusing their attention on a part of the screen with a lot of complex texture, you might choose to disable this feature. Related setting: When you enable spatial adaptive quantization, set the value for Adaptive quantization depending on your content. For homogeneous content, such as cartoons and video games, set it to Low. For content with a wider variety of textures, set it to High or Higher.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
Disabled
Enabled
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 H265SpatialAdaptiveQuantization
impl H265SpatialAdaptiveQuantization
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 H265SpatialAdaptiveQuantization
impl AsRef<str> for H265SpatialAdaptiveQuantization
source§impl Clone for H265SpatialAdaptiveQuantization
impl Clone for H265SpatialAdaptiveQuantization
source§fn clone(&self) -> H265SpatialAdaptiveQuantization
fn clone(&self) -> H265SpatialAdaptiveQuantization
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl From<&str> for H265SpatialAdaptiveQuantization
impl From<&str> for H265SpatialAdaptiveQuantization
source§impl Ord for H265SpatialAdaptiveQuantization
impl Ord for H265SpatialAdaptiveQuantization
source§fn cmp(&self, other: &H265SpatialAdaptiveQuantization) -> Ordering
fn cmp(&self, other: &H265SpatialAdaptiveQuantization) -> 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 H265SpatialAdaptiveQuantization
impl PartialEq for H265SpatialAdaptiveQuantization
source§fn eq(&self, other: &H265SpatialAdaptiveQuantization) -> bool
fn eq(&self, other: &H265SpatialAdaptiveQuantization) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd for H265SpatialAdaptiveQuantization
impl PartialOrd for H265SpatialAdaptiveQuantization
source§fn partial_cmp(
&self,
other: &H265SpatialAdaptiveQuantization
) -> Option<Ordering>
fn partial_cmp( &self, other: &H265SpatialAdaptiveQuantization ) -> 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 H265SpatialAdaptiveQuantization
impl StructuralPartialEq for H265SpatialAdaptiveQuantization
Auto Trait Implementations§
impl Freeze for H265SpatialAdaptiveQuantization
impl RefUnwindSafe for H265SpatialAdaptiveQuantization
impl Send for H265SpatialAdaptiveQuantization
impl Sync for H265SpatialAdaptiveQuantization
impl Unpin for H265SpatialAdaptiveQuantization
impl UnwindSafe for H265SpatialAdaptiveQuantization
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