A fast command line tool for a variety of lossless compression techniques, like Huffman coding and the LZW algorithm. Crunch works for any file type, however some file types will be able to achieve greater compression.
Running Crunch requires cmake. You can find ways to install it here.
After installing cmake, you can clone the repository, make a build directory, and build the project to get started.
git clone https://github.com/vaishnavi17/crunch.git
cd crunch
#creating the build directory
mkdir build
cd build
#this generates the makefile for the project
cmake ..
#running make builds the project and generates an executable called crunch
make
cd ..
#now you can run this executable and supply it with command line arguments
build/crunch [command]
The format for compression/decompression is:
[compression method tag] [compress/decompress tag] [input file path] [output file path]
The compression method tag defines the algorithm used. To use Huffman coding, use --huffman, and to use LZW use --lzw.
For compress/decompress tags, use --compress or --c to compress a file, and --decompress or --d to decompress a file.
To see the help menu, use the command --help.
To quit, use --quit or --q.
The res folder has a lot of example files that can be used (taken from Stanford's CS 106X course). Here's some commands you can try out:
--huffman --c res/moo.wav res/moo.huff
--huffman --d res/moo.huff res/moo_decompressed.wav