Crate djvu_zp 

ZP adaptive binary arithmetic coder — pure-Rust clean-room implementation.

This crate implements the ZP (Z-Prime) adaptive binary arithmetic coder from the DjVu v3 specification (https://www.sndjvu.org/spec.html), used by the JB2, IW44, and BZZ codecs that make up a DjVu file.

Usage

Decoder (no_std-capable, no allocations):

use djvu_zp::ZpDecoder;
let compressed: &[u8] = &[0x00, 0x00];
let mut dec = ZpDecoder::new(compressed)?;
let mut ctx = 0u8;
let _bit = dec.decode_bit(&mut ctx);

Encoder (requires std feature, default-on):

use djvu_zp::encoder::ZpEncoder;
let mut enc = ZpEncoder::new();
let mut ctx = 0u8;
enc.encode_bit(&mut ctx, true);
let _bytes: Vec<u8> = enc.finish();

Features

• std (default) — enables encoder::ZpEncoder. The decoder works with or without std and never allocates.

Modules

encoder

ZP adaptive binary arithmetic encoder.

tables

ZP coder state tables from the DjVu v3 specification.

Structs

ZpDecoder

ZP (Z-Prime) adaptive binary arithmetic decoder.

Enums

ZpError

Errors that can occur while initializing or decoding a ZP stream.