PpmdModel

infotheory::backends::ppmd

Struct PpmdModel 

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pub struct PpmdModel { /* private fields */ }
Expand description

Bounded-memory PPMD-inspired byte model with interpolation across orders.

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impl PpmdModel

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pub fn new(order: usize, memory_mb: usize) -> Self

Create a model with maximum order and approximate memory budget in MiB.

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pub fn fill_pdf(&mut self, out: &mut [f64; 256])

Fill out with the current normalized byte PDF.

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pub fn pdf(&mut self) -> &[f64; 256]

Borrow the current normalized byte PDF.

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pub fn cdf(&mut self) -> &[f64; 257]

Borrow the cumulative distribution derived from the current PDF.

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pub fn log_prob(&mut self, symbol: u8, min_prob: f64) -> f64

Return ln(max(P(symbol), min_prob)).

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pub fn update(&mut self, symbol: u8)

Observe one symbol and update all active contexts up to model order.

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pub fn reset_history(&mut self)

Reset only the conditioning history while preserving fitted contexts.

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pub fn update_history_only(&mut self, symbol: u8)

Advance conditioning history without updating fitted context counts.

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impl Clone for PpmdModel

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fn clone(&self) -> PpmdModel

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PpmdModel

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

Formats the value using the given formatter. Read more

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impl<T> Any for T
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Gets the TypeId of self. Read more
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Return the mutable encapsulated any object.
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fn borrow(&self) -> &T

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

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fn from(t: T) -> T

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where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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const ALIGN: usize

The alignment of pointer.
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type Init = T

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where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn vzip(self) -> V