ModuleJuicyPixels-3.3.8Haskell2010

Codec.Picture.Jpg.Internal.DefaultTable

Module used by the jpeg decoder internally, shouldn't be used in user code.

7 types
16 values

PackageJuicyPixels-3.3.8
Exports23
LanguageHaskell2010
LicenceBSD-3-Clause
SourceDefaultTable.hs

datadata DctComponent

Enumeration used to search in the tables for different components.

DcComponent AcComponent

Instances5Eq, Show, Generic, NFData, Rep

Eq DctComponentDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable
Show DctComponentDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable
Generic DctComponentDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable
NFData DctComponentDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable
type Rep DctComponent = D1 ('MetaData "DctComponent" "Codec.Picture.Jpg.Internal.DefaultTable" "JuicyPixels-3.3.8-4npCgW0M0fP84GCCAKWwog" 'False) (C1 ('MetaCons "DcComponent" 'PrefixI 'False) U1 :+: C1 ('MetaCons "AcComponent" 'PrefixI 'False) U1)Defined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable

datadata HuffmanTree

Tree storing the code used for huffman encoding.

Constructors

Branch HuffmanTree HuffmanTree
If bit is 0 take the first subtree, if 1, the right.
Leaf Word8
We should output the value
Empty
no value present

Instances2Eq, Show

Eq HuffmanTreeDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable
Show HuffmanTreeDefined in JuicyPixels-3.3.8 · Codec.Picture.Jpg.Internal.DefaultTable

typetype HuffmanTable = [[Word8]]

typetype HuffmanPackedTree = Vector Word16

typetype MacroBlock a = Vector a

Represent a compact array of 8 * 8 values. The size is not guarenteed by type system, but if makeMacroBlock is used, everything should be fine size-wise

typetype QuantificationTable = MacroBlock Int16

typetype HuffmanWriterCode = Vector (Word8, Word16)

valuescaleQuantisationMatrix :: Int -> QuantificationTable -> QuantificationTable

valuemakeMacroBlock :: Storable a => [a] -> MacroBlock a

Helper function to create pure macro block of the good size.

valuemakeInverseTable :: HuffmanTree -> HuffmanWriterCode

valuebuildHuffmanTree :: [[Word8]] -> HuffmanTree

Transform parsed coefficients from the jpeg header to a tree which can be used to decode data.

valuepackHuffmanTree :: HuffmanTree -> HuffmanPackedTree

valuehuffmanPackedDecode :: HuffmanPackedTree -> BoolReader s Word8

valuedefaultChromaQuantizationTable :: QuantificationTable

valuedefaultLumaQuantizationTable :: QuantificationTable

valuedefaultAcChromaHuffmanTree :: HuffmanTree

valuedefaultAcChromaHuffmanTable :: HuffmanTable

valuedefaultAcLumaHuffmanTree :: HuffmanTree

valuedefaultAcLumaHuffmanTable :: HuffmanTable

From the Table K.5 of ITU-81 (p154)

valuedefaultDcChromaHuffmanTree :: HuffmanTree

valuedefaultDcChromaHuffmanTable :: HuffmanTable

From the Table K.4 of ITU-81 (p153)

valuedefaultDcLumaHuffmanTree :: HuffmanTree

valuedefaultDcLumaHuffmanTable :: HuffmanTable

From the Table K.3 of ITU-81 (p153)