e3b94d644f
Five independent modules with no interdependencies: - event-bus.js: namespaced pub/sub (seq.*/ml.*/ui.*) with wildcard subscriptions and automatic AudioContext/performance.now timestamps - prng.js: seedable mulberry32 PRNG with pure-functional API, fork() for independent per-primitive streams, serializable state for freeze - pattern.js: symbolic pattern description data structure with create/clone/merge/validate, additive and multiplicative merge modes - param-map.js: maps fixed 16-output MLP to variable-count primitive params via linear interpolation, with optional per-param min/max scaling - seq-iml.js: factory for second WasmIML instance (2 inputs, 16 outputs, [16,16,16] hidden layers) following existing imlJoy/imlHand pattern All modules are ES modules with no build step. PRNG, pattern, and param-map are port-ready (explicit state, typed arrays, no closures).
117 lines
3.6 KiB
JavaScript
117 lines
3.6 KiB
JavaScript
// ShapeSeq Namespaced Event Bus
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// Lightweight pub/sub with seq.*/ml.*/ui.* namespaces and wildcard support.
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// ── Event name constants ────────────────────────────────────────────
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export const SEQ = Object.freeze({
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STEP: 'seq.step',
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NOTE_ON: 'seq.noteOn',
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NOTE_OFF: 'seq.noteOff',
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PARAM_CHANGE: 'seq.paramChange',
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LOOP_START: 'seq.loopStart',
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});
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export const ML = Object.freeze({
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TRAINED: 'ml.trained',
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FROZEN: 'ml.frozen',
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UNFROZEN: 'ml.unfrozen',
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DELTA_UPDATE: 'ml.deltaUpdate',
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});
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export const UI = Object.freeze({
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PARAM_SELECT: 'ui.paramSelect',
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CHAIN_EDIT: 'ui.chainEdit',
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PRESET_LOAD: 'ui.presetLoad',
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FREEZE_TOGGLE: 'ui.freezeToggle',
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});
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// ── Bus implementation ──────────────────────────────────────────────
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export class EventBus {
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/** @param {AudioContext} [audioCtx] - optional, used for seq.* timestamps */
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constructor(audioCtx) {
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this._listeners = new Map(); // event -> Set<callback>
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this._wildcards = new Map(); // namespace prefix (e.g. "seq") -> Set<callback>
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this._audioCtx = audioCtx ?? null;
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}
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/** Provide or replace the AudioContext used for seq.* timestamps. */
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setAudioContext(ctx) {
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this._audioCtx = ctx;
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}
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/**
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* Subscribe to an event or a wildcard namespace.
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* on('seq.step', cb) — exact match
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* on('seq.*', cb) — all events in the seq namespace
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*/
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on(event, callback) {
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if (event.endsWith('.*')) {
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const ns = event.slice(0, -2); // "seq.*" -> "seq"
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if (!this._wildcards.has(ns)) this._wildcards.set(ns, new Set());
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this._wildcards.get(ns).add(callback);
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} else {
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if (!this._listeners.has(event)) this._listeners.set(event, new Set());
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this._listeners.get(event).add(callback);
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}
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}
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/** Unsubscribe. Mirrors the on() signature. */
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off(event, callback) {
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if (event.endsWith('.*')) {
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const ns = event.slice(0, -2);
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const set = this._wildcards.get(ns);
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if (set) {
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set.delete(callback);
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if (set.size === 0) this._wildcards.delete(ns);
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}
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} else {
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const set = this._listeners.get(event);
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if (set) {
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set.delete(callback);
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if (set.size === 0) this._listeners.delete(event);
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}
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}
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}
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/**
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* Emit an event.
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* A `timestamp` field is added automatically:
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* - seq.* events use AudioContext.currentTime (seconds)
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* - all others use performance.now() (milliseconds)
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*/
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emit(event, data = {}) {
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const ns = event.split('.')[0];
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const stamped = Object.assign({ timestamp: this._stamp(ns) }, data);
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// Exact listeners
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const exact = this._listeners.get(event);
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if (exact) {
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for (const cb of exact) cb(stamped, event);
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}
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// Wildcard listeners for this namespace
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const wild = this._wildcards.get(ns);
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if (wild) {
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for (const cb of wild) cb(stamped, event);
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}
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}
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// ── private ──
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_stamp(ns) {
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if (ns === 'seq' && this._audioCtx) return this._audioCtx.currentTime;
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return performance.now();
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}
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}
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// ── Singleton convenience ───────────────────────────────────────────
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let _default = null;
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/** Return (and lazily create) the shared default bus. */
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export function getDefaultBus(audioCtx) {
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if (!_default) _default = new EventBus(audioCtx);
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else if (audioCtx) _default.setAudioContext(audioCtx);
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return _default;
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}
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