Struct arithmetic_coding::Decoder

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pub struct Decoder<M, R> where
    M: Model,
    R: BitRead,  { /* private fields */ }

Expand description

An arithmetic decoder

An arithmetic decoder converts a stream of bytes into a stream of some output symbol, using a predictive Model.

Implementations

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impl<M, R> Decoder<M, R> where
M: Model,
R: BitRead,

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pub fn new(model: M, input: R) -> Result<Self>

Construct a new Decoder

The ‘precision’ of the encoder is maximised, based on the number of bits needed to represent the Model::denominator. ‘precision’ bits is equal to u32::BITS - Model::denominator bits.

Errors

This method can fail if the underlying BitRead cannot be read from.

Panics

The calculation of the number of bits used for ‘precision’ is subject to the following constraints:

The total available bits is u32::BITS
The precision must use at least 2 more bits than that needed to represent Model::denominator

If these constraints cannot be satisfied this method will panic in debug builds

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pub fn with_precision(model: M, input: R, precision: u32) -> Result<Self>

Construct a new Decoder with a custom precision

Errors

This method can fail if the underlying BitRead cannot be read from.

Panics

The calculation of the number of bits used for ‘precision’ is subject to the following constraints:

The total available bits is BitStore::BITS
The precision must use at least 2 more bits than that needed to represent Model::denominator

If these constraints cannot be satisfied this method will panic in debug builds

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pub fn decode_symbol(
&mut self
) -> Result<Option<M::Symbol>, Error<M::ValueError>>

Read the next symbol from the stream of bits

This method will return Ok(None) when EOF is reached.

Errors

This method can fail if the underlying BitRead cannot be read from.

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pub fn chain<X>(self, model: X) -> Decoder<X, R> where
X: Model,

Reuse the internal state of the Decoder with a new model.

Allows for chaining multiple sequences of symbols from a single stream of bits

Trait Implementations

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impl<M: Debug, R: Debug> Debug for Decoder<M, R> where
 M: Model,
 R: BitRead,
 M::B: Debug,
 M::B: Debug,
 M::B: Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<M, R> RefUnwindSafe for Decoder<M, R> where
 M: RefUnwindSafe,
 R: RefUnwindSafe,
 <M as Model>::B: RefUnwindSafe,

impl<M, R> Send for Decoder<M, R> where
 M: Send,
 R: Send,
 <M as Model>::B: Send,

impl<M, R> Sync for Decoder<M, R> where
 M: Sync,
 R: Sync,
 <M as Model>::B: Sync,

impl<M, R> Unpin for Decoder<M, R> where
 M: Unpin,
 R: Unpin,
 <M as Model>::B: Unpin,

impl<M, R> UnwindSafe for Decoder<M, R> where
 M: UnwindSafe,
 R: UnwindSafe,
 <M as Model>::B: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct arithmetic_coding::Decoder

Implementations

impl<M, R> Decoder<M, R> where
M: Model,
R: BitRead,

pub fn new(model: M, input: R) -> Result<Self>

Errors

Panics

pub fn with_precision(model: M, input: R, precision: u32) -> Result<Self>

Errors

Panics

pub fn decode_symbol(
&mut self
) -> Result<Option<M::Symbol>, Error<M::ValueError>>

Errors

pub fn chain<X>(self, model: X) -> Decoder<X, R> where
X: Model<B = M::B>,

Trait Implementations

impl<M: Debug, R: Debug> Debug for Decoder<M, R> where
    M: Model,
    R: BitRead,
    M::B: Debug,
    M::B: Debug,
    M::B: Debug,

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

Auto Trait Implementations

impl<M, R> RefUnwindSafe for Decoder<M, R> where
    M: RefUnwindSafe,
    R: RefUnwindSafe,
    <M as Model>::B: RefUnwindSafe,

impl<M, R> Send for Decoder<M, R> where
    M: Send,
    R: Send,
    <M as Model>::B: Send,

impl<M, R> Sync for Decoder<M, R> where
    M: Sync,
    R: Sync,
    <M as Model>::B: Sync,

impl<M, R> Unpin for Decoder<M, R> where
    M: Unpin,
    R: Unpin,
    <M as Model>::B: Unpin,

impl<M, R> UnwindSafe for Decoder<M, R> where
    M: UnwindSafe,
    R: UnwindSafe,
    <M as Model>::B: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

fn into(self) -> U

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct arithmetic_coding::Decoder

Implementations

impl<M, R> Decoder<M, R> where M: Model, R: BitRead,

pub fn new(model: M, input: R) -> Result<Self>

pub fn with_precision(model: M, input: R, precision: u32) -> Result<Self>

pub fn decode_symbol( &mut self) -> Result<Option<M::Symbol>, Error<M::ValueError>>

pub fn chain<X>(self, model: X) -> Decoder<X, R> where X: Model<B = M::B>,

Trait Implementations

impl<M: Debug, R: Debug> Debug for Decoder<M, R> where M: Model, R: BitRead, M::B: Debug, M::B: Debug, M::B: Debug,

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

Auto Trait Implementations

impl<M, R> RefUnwindSafe for Decoder<M, R> where M: RefUnwindSafe, R: RefUnwindSafe, <M as Model>::B: RefUnwindSafe,

impl<M, R> Send for Decoder<M, R> where M: Send, R: Send, <M as Model>::B: Send,

impl<M, R> Sync for Decoder<M, R> where M: Sync, R: Sync, <M as Model>::B: Sync,

impl<M, R> Unpin for Decoder<M, R> where M: Unpin, R: Unpin, <M as Model>::B: Unpin,

impl<M, R> UnwindSafe for Decoder<M, R> where M: UnwindSafe, R: UnwindSafe, <M as Model>::B: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<M, R> Decoder<M, R> where
M: Model,
R: BitRead,

pub fn decode_symbol(
&mut self
) -> Result<Option<M::Symbol>, Error<M::ValueError>>

pub fn chain<X>(self, model: X) -> Decoder<X, R> where
X: Model<B = M::B>,

impl<M: Debug, R: Debug> Debug for Decoder<M, R> where
M: Model,
R: BitRead,
M::B: Debug,
M::B: Debug,
M::B: Debug,

impl<M, R> RefUnwindSafe for Decoder<M, R> where
M: RefUnwindSafe,
R: RefUnwindSafe,
<M as Model>::B: RefUnwindSafe,

impl<M, R> Send for Decoder<M, R> where
M: Send,
R: Send,
<M as Model>::B: Send,

impl<M, R> Sync for Decoder<M, R> where
M: Sync,
R: Sync,
<M as Model>::B: Sync,

impl<M, R> Unpin for Decoder<M, R> where
M: Unpin,
R: Unpin,
<M as Model>::B: Unpin,

impl<M, R> UnwindSafe for Decoder<M, R> where
M: UnwindSafe,
R: UnwindSafe,
<M as Model>::B: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,