struct

CrImage::JPEG::HuffmanTable

Inherits Struct < Value < Object

Huffman table for JPEG encoding/decoding

Constants

FAST_BITS = 12
FAST_SIZE = 1 << FAST_BITS

Constructors

new(bits : Array(UInt8), values : Array(UInt8))
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Instance methods

bits
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bits=(bits : Array(UInt8))
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build_decode_table

Build decoding lookup tables from bits and values arrays

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codes
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codes=(codes : Array(UInt16))
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decode(reader : BitReader) : UInt8

Decode the next Huffman symbol from the BitReader Returns the decoded symbol value (0-255)

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encode_codes
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encode_codes=(encode_codes : StaticArray(UInt16, 256))
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encode_sizes
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encode_sizes=(encode_sizes : StaticArray(UInt8, 256))
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look_fast
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look_fast=(look_fast : Slice(UInt16))
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maxcode
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maxcode=(maxcode : Array(Int32))
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mincode
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mincode=(mincode : Array(Int32))
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sizes
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sizes=(sizes : Array(UInt8))
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valptr
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valptr=(valptr : Array(Int32))
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values
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values=(values : Array(UInt8))
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