Method readMetablockPartition

java/org/brotli/dec/Decode.java:851–878

(State s, int treeType, int numBlockTypes)

  }

  private static int readMetablockPartition(State s, int treeType, int numBlockTypes) {
    int offset = s.blockTrees[2 * treeType];
    if (numBlockTypes <= 1) {
      s.blockTrees[2 * treeType + 1] = offset;
      s.blockTrees[2 * treeType + 2] = offset;
      return 1 << 28;
    }

    final int blockTypeAlphabetSize = numBlockTypes + 2;
    int result = readHuffmanCode(
        blockTypeAlphabetSize, blockTypeAlphabetSize, s.blockTrees, 2 * treeType, s);
    if (result < BROTLI_OK) {
      return result;
    }
    offset += result;
    s.blockTrees[2 * treeType + 1] = offset;

    final int blockLengthAlphabetSize = NUM_BLOCK_LENGTH_CODES;
    result = readHuffmanCode(
        blockLengthAlphabetSize, blockLengthAlphabetSize, s.blockTrees, 2 * treeType + 1, s);
    if (result < BROTLI_OK) {
      return result;
    }
    offset += result;
    s.blockTrees[2 * treeType + 2] = offset;

    return readBlockLength(s.blockTrees, 2 * treeType + 1, s);
  }

  private static void calculateDistanceLut(State s, int alphabetSizeLimit) {
    final byte[] distExtraBits = s.distExtraBits;