Struct LzmaOptions 

pub struct LzmaOptions {
    pub dict_size: u32,
    pub lc: u32,
    pub lp: u32,
    pub pb: u32,
    pub mode: EncodeMode,
    pub nice_len: u32,
    pub mf: MfType,
    pub depth_limit: i32,
    pub preset_dict: Option<Vec<u8>>,
}

Available on crate feature encoder only.

Encoder settings when compressing with LZMA and LZMA2.

Fields

dict_size: u32

Dictionary size in bytes.

lc: u32

Number of literal context bits (0-8).

lp: u32

Number of literal position bits (0-4).

pb: u32

Number of position bits (0-4).

mode: EncodeMode

Compression mode.

nice_len: u32

Match finder nice length.

mf: MfType

Match finder type.

depth_limit: i32

Match finder depth limit.

preset_dict: Option<Vec<u8>>

Preset dictionary data.

Implementations

impl LzmaOptions

pub const LC_DEFAULT: u32 = 3u32

Default number of literal context bits.

pub const LP_DEFAULT: u32 = 0u32

Default number of literal position bits.

pub const PB_DEFAULT: u32 = 2u32

Default number of position bits.

pub const NICE_LEN_MAX: u32 = 273u32

Maximum match finder nice length.

pub const NICE_LEN_MIN: u32 = 8u32

Minimum match finder nice length.

pub const DICT_SIZE_DEFAULT: u32 = 8_388_608u32

Default dictionary size (8MB).

pub fn new( dict_size: u32, lc: u32, lp: u32, pb: u32, mode: EncodeMode, nice_len: u32, mf: MfType, depth_limit: i32, ) -> Self

Creates new LZMA encoding options with specified parameters.

pub fn with_preset(preset: u32) -> Self

preset: [0..9]

pub fn set_preset(&mut self, preset: u32)

preset: [0..9]

pub fn get_memory_usage(&self) -> u32

Returns the estimated memory usage in kilobytes for these options.

pub fn get_props(&self) -> u8

Returns the LZMA properties byte for these options.

Trait Implementations

impl Clone for LzmaOptions

fn clone(&self) -> LzmaOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LzmaOptions

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

Formats the value using the given formatter.

impl Default for LzmaOptions

fn default() -> Self

Returns the “default value” for a type.