I’m working on the Roc Toolkit open-source project, a development kit for realtime audio streaming over the network. You can read more about the project in these two articles: 1, 2. We decided to implement a set of PulseAudio modules that will allow PulseAudio to use Roc as a network transport. Many Linux distros employ …

MiniSAPServer is a small program that periodically sends SAP/SDP messages, given a config file and destination address. I’ve prepared a complementary MiniSAPListener program which listens for SAP/SDP messages, and prints them to stdout or passes to a shell command. The source code is mostly extracted from PulseAudio RTP …

File locking is a mutual-exclusion mechanism for files. Linux supports two major kinds of file locks: advisory locks mandatory locks Below we discuss all lock types available in POSIX and Linux and provide usage examples.

Unix domain sockets are a networkless version of Internet sockets. They have several advantages: Unix domain sockets are files, so file-system permissions may be used for them when one end is closed (e.g. process exits), SIGPIPE is delivered to another end performance may be up to 2x better See details here.

I was playing with various media libraries recently and have prepared several snippets demonstrating how one can decode and play an audio file in two separate steps. The source code is available on GitHub here and there. The following libraries are used: FFmpeg SoX ALSA (libasound) PulseAudio libsndfile Each snippet is a small …

In a large project that uses SCons, VariantDir, and source code generation, happens one of the following: generated source files are rebuilt every time when scons is launched if .sconsign.dblite is removed manually, scons crashes with the following trace: OSError: [Errno 2] No such file or directory: '.sconsign.dblite': …

Xlib (also known as libX11) is an X11 client library. It contains functions for interacting with an X server. This page provides several code snippets implementing complete X11 programs.

Below you can find code snippets that match USB devices using libudev. A good tutorial is available here: libudev and Sysfs Tutorial.

httpexpect is a new Go package for end-to-end HTTP and REST API testing. It provides convenient chainable helpers for building HTTP request, sending it, and inspecting received HTTP response and its payload. Links: repo on GitHub announcement on Reddit The key point is that request construction and response assertions become …