74 lines
4.4 KiB
JavaScript
74 lines
4.4 KiB
JavaScript
// Checks that each native-diff LIMITS entry trips on a known perturbation and stays quiet on a clean or in-tolerance pair.
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// The pair is synthetic (a seeded tone-and-noise burst against a perturbed copy); no render, no dotnet, nothing heard.
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// Usage: node native-diff.test.mjs
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import assert from "node:assert/strict";
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import { SR } from "./metrics.js";
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import { LIMITS, compareRenders, violationsOf } from "./native-compare.js";
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let n = 0;
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const t = (name, fn) => { fn(); n++; console.log(`ok ${name}`); };
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// Tones at 110/330/990 Hz with a slow envelope plus seeded noise: broadband enough that a one-sample shift is far from silent.
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const sig = (() => {
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let s = 12345; const r = () => { s = (Math.imul(s, 1664525) + 1013904223) >>> 0; return s / 4294967296 - 0.5; };
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const x = new Float32Array(SR * 3);
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for (let i = 0; i < x.length; i++) { const t = i / SR; x[i] = 0.25 * (0.6 * Math.sin(2 * Math.PI * 110 * t) + 0.3 * Math.sin(2 * Math.PI * 330 * t) + 0.2 * Math.sin(2 * Math.PI * 990 * t)) * (0.7 + 0.3 * Math.sin(2 * Math.PI * 1.3 * t)) + 0.05 * r(); }
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return x;
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})();
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const gain = (x, db) => x.map((v) => v * Math.pow(10, db / 20));
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const shift = (x, k) => { const y = new Float32Array(x.length); y.set(x.subarray(0, x.length - k), k); return y; };
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const smooth = (x) => x.map((v, i) => 0.5 * (v + (x[i - 1] ?? 0))); // two-point average: a mild low-pass that moves the spectral centroid
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const trips = (native, mode = "library") => violationsOf(compareRenders("probe", sig, native), mode);
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t("identical renders trip nothing in either mode", () => {
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assert.deepEqual(trips(sig), []); assert.deepEqual(trips(sig, "imp3"), []);
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});
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t("a +1 dB gain trips loudness and true peak, and neither the centroid nor (library mode) the sample bound", () => {
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assert.deepEqual(trips(gain(sig, 1)).sort(), ["loudnessLufs", "truePeakDb"]);
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});
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t("a +1 dB gain also trips the sample bound under imp3 (relative error about -18 dB)", () => {
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assert.deepEqual(trips(gain(sig, 1), "imp3").sort(), ["loudnessLufs", "relRmsErrDb", "truePeakDb"]);
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});
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t("loudness trips on its own at +0.2 dB, true peak at +0.6 dB: each limit has its own edge", () => {
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assert.deepEqual(trips(gain(sig, 0.2)), ["loudnessLufs"]);
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assert.ok(!trips(gain(sig, 0.05)).includes("loudnessLufs"), "+0.05 dB is inside the 0.1 LU limit");
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assert.ok(trips(gain(sig, 0.6)).includes("truePeakDb"));
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assert.ok(!trips(gain(sig, 0.4)).includes("truePeakDb"), "+0.4 dB is inside the 0.5 dB true-peak limit");
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});
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t("a spectral change (a two-point low-pass) trips the centroid limit", () => {
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const row = compareRenders("probe", sig, smooth(sig));
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assert.ok(100 * Math.abs(row.native.centroidMedianHz - row.wasm.centroidMedianHz) / row.wasm.centroidMedianHz > LIMITS.centroidPct);
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assert.ok(violationsOf(row, "library").includes("centroidMedianHz"));
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});
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t("centroid edge, in literal numbers: 1000 Hz vs 1009 Hz (0.9 %) passes, vs 1011 Hz (1.1 %) trips, in both directions", () => {
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const base = compareRenders("probe", sig, sig), at = (w, nat) => ({ ...base, wasm: { ...base.wasm, centroidMedianHz: w }, native: { ...base.native, centroidMedianHz: nat } });
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for (const [w, nat] of [[1000, 1009], [1000, 991], [1000, 1000]]) assert.deepEqual(violationsOf(at(w, nat), "library"), [], `${w} vs ${nat}`);
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for (const [w, nat] of [[1000, 1011], [1000, 989]]) assert.deepEqual(violationsOf(at(w, nat), "library"), ["centroidMedianHz"], `${w} vs ${nat}`);
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});
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t("a one-sample shift trips only the sample bound, and only under imp3 (library mode has no sample bound)", () => {
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const sh = shift(sig, 1), row = compareRenders("probe", sig, sh);
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assert.ok(row.relRmsErrDb > LIMITS.relRmsErrDbImp3, `relRmsErrDb ${row.relRmsErrDb}`);
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assert.deepEqual(violationsOf(row, "imp3"), ["relRmsErrDb"]);
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assert.deepEqual(violationsOf(row, "library"), []);
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assert.deepEqual(violationsOf(row, "old"), []);
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});
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t("an error well inside the sample bound passes under imp3", () => {
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const near = sig.map((v, i) => v + (i % 2 ? 1 : -1) * 1e-5);
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assert.ok(compareRenders("probe", sig, near).relRmsErrDb < LIMITS.relRmsErrDbImp3);
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assert.deepEqual(trips(near, "imp3"), []);
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});
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t("a length mismatch is an error row, not a trimmed comparison", () => {
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const row = compareRenders("probe", sig, sig.subarray(0, sig.length - 512));
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assert.match(row.error, /length mismatch: wasm 144000, native 143488/);
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assert.equal(row.wasm, undefined);
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});
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console.log(`${n} passed`);
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