Squeezelite is a lightweight, headless Squeezebox emulator that acts as a network audio player for Lyrion Music Server (formerly Logitech Media Server). It receives audio streams via the Slimproto protocol, decodes a wide range of codecs (MP3, FLAC, AAC, Ogg Vorbis, WMA, ALAC, DSD, Opus), and outputs to local audio hardware through ALSA, PortAudio, PulseAudio, or stdout. The application is written in C with a modular, multi-threaded architecture: separate threads for network streaming, decoding, resampling, and output, all communicating via circular buffers with mutex protection. It supports high-resolution audio, DSD (DoP and native), resampling with libsoxr, visualizer export to shared memory, IR remote control, and GPIO amplifier control. The codebase is highly portable, with dedicated Makefiles for Linux, macOS, Windows, Solaris, and various ARM architectures, as well as Visual Studio project files. Build-time options (LINKALL, DSD, RESAMPLE, etc.) allow static or dynamic linking of codec libraries. The project is actively maintained with a responsive community and is widely used in embedded audio players and home automation systems.
teddyCloud is a self-hosted, open-source replacement server for the Toniebox children's audio player. It implements the entire cloud-side protocol stack—including HTTPS, TLS, MQTT, and custom protobuf-based APIs—to intercept, proxy, cache, and serve audio content to physical Toniebox devices. The application is written in C, builds on the CycloneTCP networking library, and integrates a full MQTT server, a Home Assistant bridge, a web administration interface, and tools for firmware patching (ESP32, CC3200, CC3235) and certificate generation. It also includes a WebAssembly-based TAF audio encoder for browser-side use. The codebase is a result of extensive reverse engineering of the Toniebox protocol, demonstrating deep expertise in embedded systems, cryptography, and IoT networking. While tightly coupled to the Toniebox ecosystem, several components (MQTT server, settings overlay system, WASM encoder) are designed with sufficient abstraction to be reusable in other contexts.
C-EDIT is a terminal-based text editor implemented in C without using ncurses. It features a modular architecture with separate components for terminal handling (rterm), screen buffer management (scbuf), keyboard input (keyb), text buffer management (edbuf), file operations (fileb), and user interface elements (ui, menu). The editor provides standard text editing capabilities including file open/save, cursor navigation, basic editing operations, and syntax highlighting. A key innovation is its double screen buffer system that minimizes flicker during updates. The application uses ANSI escape codes for terminal control and implements custom keyboard handling for special keys and accents. The project shows active maintenance with recent commits and ongoing development as indicated in TODO files.