Implements thread-safe reference counting for object lifecycle management. Used throughout the codebase to prevent memory leaks and use-after-free errors. Demonstrates a reusable pattern for resource management in C that can be extracted with minimal dependencies.

Provides a fixed-size FIFO buffer with read/write pointers and overflow handling, optimized for audio data threading. Used in codec and transport threads for sample buffering. Demonstrates a reusable buffering pattern suitable for real-time data streams with minimal external dependencies.

Implements rate synchronization to maintain constant bitrate in audio streams by adjusting sleep times based on elapsed sample count. Critical for compensating Bluetooth jitter in audio transport. Shows a non-obvious timing pattern reusable in any constant bitrate streaming application.

Lightweight logging framework supporting debug levels and syslog output. Used ubiquitously across the codebase for diagnostics. Demonstrates a reusable logging pattern that is simple, configurable, and suitable for daemon/embedded applications.

Provides hex encoding/decoding utilities for binary data representation. Used in test tools and utilities for data transfer and debugging. Demonstrates an isolated, dependency-free utility for data conversion reusable in any project requiring hex manipulation.