class

Brotli::Enc::ZopfliCostModel

Inherits Reference < Object

Histogram based cost model for zopflification.

Constructors

new(dist : DistanceParams, num_bytes : Int32)

Instance methods

cost_cmd

cost_cmd=(cost_cmd : Slice(Float32))

cost_dist

cost_dist=(cost_dist : Slice(Float32))

cost_literal

cost_literal=(cost_literal : Slice(Float32))

distance_histogram_size

distance_histogram_size=(distance_histogram_size : Int32)

get_command_cost(cmdcode : Int32) : Float32

get_distance_cost(distcode : Int32) : Float32

get_literal_costs(from_pos : Int32, to_pos : Int32) : Float32

histogram_cmd

histogram_cmd=(histogram_cmd : Slice(UInt32))

histogram_dist

histogram_dist=(histogram_dist : Slice(UInt32))

histogram_literal

Temporary data (C: ZopfliCostModelArena + literal_histograms union).

histogram_literal=(histogram_literal : Slice(UInt32))

Temporary data (C: ZopfliCostModelArena + literal_histograms union).

literal_costs

literal_costs=(literal_costs : Slice(Float32))

literal_histogram_scratch

3 * 256 scratch for estimate_bit_costs_for_literals.

literal_histogram_scratch=(literal_histogram_scratch : Slice(UInt32))

3 * 256 scratch for estimate_bit_costs_for_literals.

min_cost_cmd

min_cost_cmd=(min_cost_cmd : Float32)

num_bytes

num_bytes=(num_bytes : Int32)

set_from_commands(position : Int32, ringbuffer : Bytes, ringbuffer_mask : Int32, commands : Array(Command), base : Int32, num_commands : Int32, last_insert_len : Int32) : Nil

ZopfliCostModelSetFromCommands. commands is the base of the run, num_commands its length (C passes commands + orig offset).

set_from_literal_costs(position : Int32, ringbuffer : Bytes, ringbuffer_mask : Int32) : Nil

ZopfliCostModelSetFromLiteralCosts.