C – Mathieu Rodic

Libavcodec tutorial: decode virtually any audio file in C/C++

2017-01-282017-01-30 by Mathieu Rodic

After hours browsing the Internet, I couldn’t get my hands on a working tutorial to simply extract audio samples from a file using libavcodec. So here’s to you, a full working example! Warning FFMPEG and the libraries it depends on are often updated, and their API can drastically change between versions. This code works with … Read more

Weighted graphs: generate a layout in C++

2014-10-052014-12-31 by Mathieu Rodic

What is this all about? Graphs are becoming more and more popular to represent interconnected data. We’ll see here how to make a simple program taking the weights of the relations between the nodes as an input, and outputs the coordinates of the nodes as an output. For example, imagine we have in a graph … Read more

Shortest encryption program in pure C

2014-10-012014-12-31 by Mathieu Rodic

Why? In a recent code golf contest, the goal was to write a useful program within 100 characters tops… What does the program do? This program can encode and decode any kind of data (text, binary data…), using a user-defined key (passphrase) of any desired length. It has been adaptated from the Vigenère cypher, replacing … Read more