Struct JlsContext 

pub struct JlsContext {
    pub a: i32,
    pub b: i32,
    pub c: i8,
    pub n: i16,
}

Context for regular (non-run) mode.

Each context stores running statistics used to compute the Golomb parameter and prediction correction (bias C).

Fields

a: i32

Accumulated |error| (magnitude).

b: i32

Accumulated error (signed, used for bias).

c: i8

Prediction correction (bias).

n: i16

Count (number of samples coded in this context).

Implementations

impl JlsContext

pub fn new(a_init: i32) -> Self

Create a new context with initial values per the JPEG-LS standard.

pub fn get_golomb(&self) -> i32

Compute the Golomb coding parameter k for this context.

pub fn get_error_correction(&self, k: i32) -> i32

Get the error correction value for Golomb parameter k.

pub fn update_variables(&mut self, err_val: i32, near: i32, reset_value: i32)

Update context statistics after coding an error value. err_val is the mapped (quantized, mod-ranged) error value.

Trait Implementations

impl Clone for JlsContext

fn clone(&self) -> JlsContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JlsContext

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

Formats the value using the given formatter.