stuff-from-scratch/test/compression/TestHuffmanStream.cpp

#include <iostream>

#include "HuffmanStream.h"


void testHuffmanCodeLengthTable()
{
    HuffmanCodeLengthTable table;

    std::vector<std::pair<unsigned, unsigned char> > mappings {{144, 8}, {112, 9}, {24, 7}, {8 ,8}};
    std::vector<unsigned char> code_length_sequence;
    for(const auto& entry : mappings)
    {
        for(unsigned idx=0;idx<entry.first;idx++)
        {
            code_length_sequence.push_back(entry.second);
        }
    }
    table.setInputLengthSequence(code_length_sequence, false);

    table.buildCompressedLengthSequence();

    auto compressed_sequence = table.getCompressedLengthSequence();
    for (auto entry : compressed_sequence)
    {
        std::cout << "Count " << entry.first << " extra bits " << entry.second << std::endl;
    }

    auto compressed_lengths = table.getCompressedLengthCounts();
    for(unsigned idx = 0; idx<compressed_lengths.size(); idx++)
    {
        std::cout << "Slot " << idx << " length " << compressed_lengths[idx] << std::endl;
    }

}


int main()
{
    testHuffmanCodeLengthTable();
    //HuffmanStream stream(nullptr, nullptr);

    //stream.setCodeLengthAlphabetLengths({3, 3, 3, 3, 3, 2, 4, 4});

    //stream.setCodeLengthAlphabetLengths({2, 2, 3, 3, 3, 3});

    //stream.buildCodeLengthMapping();

    std::cout << "*******" << std::endl;
    //stream.setCodeLengthAlphabetLengths({4, 0, 6, 7, 3, 2, 4, 2, 7, 4, 6, 3, 0, 6});

    //stream.buildCodeLengthMapping();

    //const auto mapping = stream.getCodeLengthMapping();

    //stream.generateFixedCodeMapping();


    return 0;
}