enricobuehler
a913042367
Ground-up low-latency streaming stack per docs/implementation-plan.md. M1 is
complete and tested; Linux host backends are cfg-gated stubs to be filled in on
real hardware (M0/M2).
lumen-core (built + tested on macOS/aarch64 — 21 tests):
- fec: ErasureCoder over GF(2^8) (reed-solomon-erasure, Moonlight-compatible)
and GF(2^16) Leopard-RS (reed-solomon-simd, the >1 Gbps wall-breaker); proptested
- packet: zero-copy #[repr(C)] framing, multi-block, FEC-aware reassembly
- crypto: AES-128-GCM with per-direction nonce salts + sequence-as-AAD
- session: host submit / client poll hot paths + input; loopback & UDP transports
- abi: opaque handles, versioned LumenConfig, panic guards; cbindgen-generated header
- acceptance: Rust loopback+proptest and a C harness that links the staticlib
Scaffold (compiles green on all platforms): lumen-host (vdisplay/capture/encode/
inject/web/pipeline seams under cfg(linux)), lumen-client-rs, tools/{loss-harness,
latency-probe}, Apple/Android client stubs, Gitea CI, docs.
Hardened against a multi-agent adversarial review (13 verified findings fixed,
regression-tested): reassembler memory-DoS bounds + block-consistency validation,
GCM nonce-reuse direction separation, ABI struct_size guard + range checks, FEC
shard-length guards, shard_payload datagram bound, key zeroization + Debug redaction.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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lumen Apple client (M5)
Swift + VideoToolbox (decode) + Metal (present) + SwiftUI, linking lumen-core through
the generated C ABI — no glue layer. Imports include/lumen_core.h via a module map.
Wiring
- Build the core as a static or dynamic library for Apple targets:
rustup target add aarch64-apple-ios aarch64-apple-darwin cargo build -p lumen-core --release --target aarch64-apple-darwin # liblumen_core.a / .dylib - Expose the C ABI to Swift with a module map (
module.modulemaphere) that points at the checked-in header../../include/lumen_core.h. - In Swift: create a client
LumenSession,lumen_client_poll_frameon a display-link thread, feed the access unit to aVTDecompressionSession, present theCVImageBufferwith Metal aligned to the screen's refresh (frame pacing, plan §7).
Status
Scaffold. The client half of lumen_core (poll_frame, FEC recovery, reassembly) is
complete and tested; this target adds the platform decode + present.