forked from unom/punktfunk
Centralize the client-side loss-range detector in punktfunk-core so every embedder shares one implementation instead of re-deriving the wrapping frame-index arithmetic: - NativeClient::note_frame_index(frame_index) folds each received AU (in receive order) through RfiRecovery::observe, firing a throttled RFI request for the exact lost span [first_missing, frame_index-1] on a forward gap. A host that can RFI (AMD LTR / NVENC) re-references a known-good frame instead of paying a 20-40x IDR spike; the frames_dropped-driven keyframe path stays the backstop for when the recovery frame itself is lost. - Export request_rfi + note_frame_index over the C ABI (Apple client). - Call it from the Android (hw+sw pumps), Apple (StreamPump + Stage2Pipeline via PunktfunkConnection.noteFrameIndex), and Windows in-process pumps. Linux/Deck inherit it through pf-client-core's session pump. - Split the decision into a pure RfiRecovery::observe(frame_index, now) and add 8 unit tests: arming, contiguous runs, exact lost-range, single-frame drop, the 100ms throttle (burst-suppress then re-open), reorder stragglers, and u32 wraparound (contiguous + gap-range). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>