forked from unom/punktfunk
enricobuehlerandClaude Opus 5
bc5ec5105c
The Linux backend decision existed as open_video_backend's string match plus five partial hand-copies (the zero-copy-plane gate, the pyro advertisement gate, the software advertisement pin, the vulkan pref ceiling, resolved_backend_is_gpu). Windows solved this long ago — windows_resolved_backend() is consumed by its dispatch AND its mirrors, with labels still stamped at the open sites. Linux now has the twin: resolve_linux_backend (pure, lazy auto probe) + linux_resolved_backend (config wrapper, unknown→auto exactly as every mirror's old `_` arm). ⚠ This deliberately DEVIATES from the audit's shadow-assertion prescription, on both critics' findings: the shadow had no execution venue (open_video had ZERO test call sites; shipped hosts are --release) — unfalsifiable ceremony — and the file's own Windows half proves dispatch-consumes-resolver is safe: the mgmt record is protected by the label-from-the-open-site convention, not by resolver avoidance. One consumed table beats two tables plus an inert cross-check. Preservation riders from the critique, all applied: - pref_ceiling KEEPS its cfg!(vulkan-encode) branch (the resolver is feature-blind; dropping it re-creates advertise-then-die-at-open). - linux_zero_copy_is_vaapi's Vulkan|Software arm preserves the old `_` fallthrough EXACTLY — the vulkan-on-NVIDIA capture-plane mismatch and the software twin are FILED in the design doc, not fixed here. - resolved_backend_is_gpu splits as linux + not(any(windows, linux)) — never a target list, so no exotic target loses the fn. - The auto probe is lazy (impl FnOnce) — explicit prefs stay zero-probe (/serverinfo polls through these mirrors), pinned by a panicking closure in the resolver test. New coverage: the full alias table pinned, and a GPU-free dispatch test through the real open_video_backend (software arm, vendored openh264) — its first test call site anywhere. Config-latch seam guarded loudly. Cross-crate mirrors recorded out of scope in the design doc: session_plan::resolve_encoder, gamestream/serverinfo.rs base_codec_mode_support, capture.rs's "pyrowave" string. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>