Class Decode

java.lang.Object
com.itextpdf.io.codec.brotli.dec.Decode
final class Decode extends Object
API for Brotli decompression.

  • Field Details

    • DEFAULT_CODE_LENGTH

      private static final int DEFAULT_CODE_LENGTH
      See Also:

    • CODE_LENGTH_REPEAT_CODE

      private static final int CODE_LENGTH_REPEAT_CODE
      See Also:

    • NUM_LITERAL_CODES

      private static final int NUM_LITERAL_CODES
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    • NUM_INSERT_AND_COPY_CODES

      private static final int NUM_INSERT_AND_COPY_CODES
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    • NUM_BLOCK_LENGTH_CODES

      private static final int NUM_BLOCK_LENGTH_CODES
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    • LITERAL_CONTEXT_BITS

      private static final int LITERAL_CONTEXT_BITS
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    • DISTANCE_CONTEXT_BITS

      private static final int DISTANCE_CONTEXT_BITS
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    • HUFFMAN_TABLE_BITS

      private static final int HUFFMAN_TABLE_BITS
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    • HUFFMAN_TABLE_MASK

      private static final int HUFFMAN_TABLE_MASK
      See Also:

    • CODE_LENGTH_CODES

      private static final int CODE_LENGTH_CODES
      See Also:

    • CODE_LENGTH_CODE_ORDER

      private static final int[] CODE_LENGTH_CODE_ORDER

    • NUM_DISTANCE_SHORT_CODES

      private static final int NUM_DISTANCE_SHORT_CODES
      See Also:

    • DISTANCE_SHORT_CODE_INDEX_OFFSET

      private static final int[] DISTANCE_SHORT_CODE_INDEX_OFFSET

    • DISTANCE_SHORT_CODE_VALUE_OFFSET

      private static final int[] DISTANCE_SHORT_CODE_VALUE_OFFSET

    • FIXED_TABLE

      private static final int[] FIXED_TABLE
      Static Huffman code for the code length code lengths.

  • Constructor Details

    • Decode

      Decode()

  • Method Details

    • decodeVarLenUnsignedByte

      private static int decodeVarLenUnsignedByte(BitReader br)
      Decodes a number in the range [0..255], by reading 1 - 11 bits.

    • decodeMetaBlockLength

      private static void decodeMetaBlockLength(BitReader br, State state)

    • readSymbol

      private static int readSymbol(int[] table, int offset, BitReader br)
      Decodes the next Huffman code from bit-stream.

    • readBlockLength

      private static int readBlockLength(int[] table, int offset, BitReader br)

    • translateShortCodes

      private static int translateShortCodes(int code, int[] ringBuffer, int index)

    • moveToFront

      private static void moveToFront(int[] v, int index)

    • inverseMoveToFrontTransform

      private static void inverseMoveToFrontTransform(byte[] v, int vLen)

    • readHuffmanCodeLengths

      private static void readHuffmanCodeLengths(int[] codeLengthCodeLengths, int numSymbols, int[] codeLengths, BitReader br)

    • readHuffmanCode

      static void readHuffmanCode(int alphabetSize, int[] table, int offset, BitReader br)

    • decodeContextMap

      private static int decodeContextMap(int contextMapSize, byte[] contextMap, BitReader br)

    • decodeBlockTypeAndLength

      private static void decodeBlockTypeAndLength(State state, int treeType)

    • decodeLiteralBlockSwitch

      private static void decodeLiteralBlockSwitch(State state)

    • decodeCommandBlockSwitch

      private static void decodeCommandBlockSwitch(State state)

    • decodeDistanceBlockSwitch

      private static void decodeDistanceBlockSwitch(State state)

    • maybeReallocateRingBuffer

      private static void maybeReallocateRingBuffer(State state)

    • readMetablockInfo

      private static void readMetablockInfo(State state)
      Reads next metablock header.
      Parameters:
      state - decoding state

    • readMetablockHuffmanCodesAndContextMaps

      private static void readMetablockHuffmanCodesAndContextMaps(State state)

    • copyUncompressedData

      private static void copyUncompressedData(State state)

    • writeRingBuffer

      private static boolean writeRingBuffer(State state)

    • setCustomDictionary

      static void setCustomDictionary(State state, byte[] data)

    • decompress

      static void decompress(State state)
      Actual decompress implementation.