Enum AudioSelectorType 

#[non_exhaustive]
pub enum AudioSelectorType {
    AllPcm,
    HlsRenditionGroup,
    LanguageCode,
    Pid,
    Stream,
    Track,
    Unknown(UnknownVariantValue),
}

When writing a match expression against AudioSelectorType, 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 audioselectortype = unimplemented!();
match audioselectortype {
    AudioSelectorType::AllPcm => { /* ... */ },
    AudioSelectorType::HlsRenditionGroup => { /* ... */ },
    AudioSelectorType::LanguageCode => { /* ... */ },
    AudioSelectorType::Pid => { /* ... */ },
    AudioSelectorType::Stream => { /* ... */ },
    AudioSelectorType::Track => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}

The above code demonstrates that when audioselectortype represents NewFeature, the execution path will lead to the second last match arm, even though the enum does not contain a variant AudioSelectorType::NewFeature in the current version of SDK. The reason is that the variable other, created by the @ operator, is bound to AudioSelectorType::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 AudioSelectorType::NewFeature is defined. Specifically, when audioselectortype represents NewFeature, the execution path will hit the second last match arm as before by virtue of calling as_str on AudioSelectorType::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.

Specify how MediaConvert selects audio content within your input. The default is Track. PID: Select audio by specifying the Packet Identifier (PID) values for MPEG Transport Stream inputs. Use this when you know the exact PID values of your audio streams. Track: Default. Select audio by track number. This is the most common option and works with most input container formats. If more types of audio data get recognized in the future, these numberings may shift, but the numberings used for Stream mode will not. Language code: Select audio by language using an ISO 639-2 or ISO 639-3 three-letter code in all capital letters. Use this when your source has embedded language metadata and you want to select tracks based on their language. HLS rendition group: Select audio from an HLS rendition group. Use this when your input is an HLS package with multiple audio renditions and you want to select specific rendition groups. All PCM: Select all uncompressed PCM audio tracks from your input automatically. This is useful when you want to include all PCM audio tracks without specifying individual track numbers. Stream: Select audio by stream number. Stream numbers include all tracks in the source file, regardless of type, and correspond to either the order of tracks in the file, or if applicable, the stream number metadata of the track. Although all tracks count toward these stream numbers, in this audio selector context, only the stream number of a track containing audio data may be used. If your source file contains a track which is not recognized by the service, then the corresponding stream number will still be reserved for future use. If more types of audio data get recognized in the future, these numberings will not shift.

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.

AllPcm

HlsRenditionGroup

LanguageCode

Pid

Stream

Track

Unknown(UnknownVariantValue)

👎Deprecated:

Don’t directly match on 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

impl AudioSelectorType

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

pub const fn values() -> &'static [&'static str]

Returns all the &str representations of the enum members.

impl AudioSelectorType

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

impl AsRef<str> for AudioSelectorType

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for AudioSelectorType

fn clone(&self) -> AudioSelectorType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AudioSelectorType

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

Formats the value using the given formatter.

impl Display for AudioSelectorType

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

Formats the value using the given formatter.

impl From<&str> for AudioSelectorType

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for AudioSelectorType

type Err = Infallible

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err>

Parses a string s to return a value of this type.

impl Hash for AudioSelectorType

fn hash<__H: Hasher>(&self, state: &mut __H)

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 Ord for AudioSelectorType

fn cmp(&self, other: &AudioSelectorType) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for AudioSelectorType

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for AudioSelectorType

fn partial_cmp(&self, other: &AudioSelectorType) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for AudioSelectorType

impl StructuralPartialEq for AudioSelectorType