nx_video_client_wasm.nx

nx_video_client_wasm.nx -- the Nishi Video BROWSER CLIENT CORE, for the WAT/WASM target. Operator 2026-06-10: "we dont want to use javascript or anything except as a last mile translation for 3rd party browsers." ALL format/protocol/sample logic the video client needs lives HERE, in NishiLang, shipped to the browser as nx_video_client.wasm. The JS that remains in app.js is a named LAST-MILE SHIM: mount this module + bridge the platform primitives the browser gates behind JS APIs (getUserMedia, canvas pixels, AudioContext buffers, WebSocket send/recv). No format byte and no sample arithmetic is computed in JavaScript. Like nx_sha256_wasm.nx: imports NOTHING, works in caller-supplied linear memory regions, no syscalls. Team-side authority for the NV1 container is nx_nv1.nx -- nx_vc_gate cross-checks this module against it natively. Exports (pointers are i64 offsets into the module's linear memory): NV1 container (NLC1 -- see knowledge/specs/2026-06-10-nishilossless-...) vc_nv1_header(out, rate) -> 24 vc_nv1_chunk(out, w, kind, t_ms, payload, n) -> new w vc_nv1_end(out, w, dur_ms) -> new w vc_nv1_validate(buf, n, info) -> 0 | negative defect code vc_nv1_next(buf, n, off, info) -> next off | 0 at end | negative info[0]=kind info[1]=len info[2]=t_ms info[3]=payload_off Room wire frames (13-byte kind/id/seq header, relay broadcast) vc_wire_pack(out, kind, id, seq, payload, n) -> total len vc_wire_parse(buf, n, info) -> 0 | -1 info[0]=kind info[1]=seq info[2]=payload_off info[3]=payload_len Sample plane (IEEE 754 decoded with INTEGER math -- bit-exact, no float unit on the trust path; matches the JS path it replaces: clamp [-1,1] then TRUNCATE toward zero; NaN->0, +/-Inf->clamp) vc_f32_to_i16(inb, n_samples, outb) -> n_samples (LE f32 bits -> LE i16) vc_i16_to_f32(inb, n_samples, outb) -> n_samples (LE i16 -> LE f32 bits, EXACT) Send-rate governor (the fps/quality ladder decision) vc_ladder_step(idx, n_rungs, rtt_ms, degrade_ms, recover_ms, good) -> idx license_tier: ORIGINAL