Implements a CPU-based circuit breaker with configurable water levels (high/critical/dying) that progressively disables non-critical features under load. The pattern is generic, reusable for any service needing graceful degradation, and clearly separates interface (ISrsCircuitBreaker) from implementation.

SrsFastStream is a user-space read buffer that coalesces small socket reads into larger chunks, dramatically reducing syscall overhead for streaming protocols. It exposes a simple read interface and can be extracted for any high-throughput network application requiring low-latency, high-performance I/O.

SrsStreamPublishTokenManager provides a mutex-protected, per-stream exclusive token to prevent concurrent publishing of the same stream URL across different protocols (RTMP, SRT, WebRTC). This is a clean concurrency pattern reusable in any system needing to enforce single-writer semantics for a resource.

Implements a general-purpose RTP ring buffer with NACK-based retransmission support, handling packet reordering and selective loss recovery. This is a self-contained component that could be reused in any real-time UDP streaming system needing jitter buffering or loss resilience. (Note: exact path not confirmed, but the component is highlighted in chunk summaries.)

A Go structured logger that enriches every log entry with a random context ID (CID) for request tracing. It implements the standard library slog.Handler interface, is fully testable, and can be dropped into any Go service needing correlation IDs across distributed operations.