Initial Commit

packages/media/audio/audio-analysis-loudness/tests/integration.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { LoudnessMeter } from "../src/index.js";
+import { buildDoc, sine } from "./helpers/build-doc.js";
+
+describe("LoudnessMeter integration", () => {
+    it("full round-trip on a 48 kHz stereo 5 s fixture", {
+        timeout: 60000,
+    }, async () => {
+        const sr = 48000;
+        const left = sine(0.5, 1000, sr, 5);
+        const right = sine(0.5, 1000, sr, 5);
+        const doc = buildDoc([left, right], sr);
+        const result = await new LoudnessMeter().analyze(doc);
+        expect(result.op).toBe("loudness-meter");
+        expect(result.sampleRate).toBe(sr);
+        expect(result.dcOffset.length).toBe(2);
+        expect(result.truePeak).toBeGreaterThanOrEqual(result.peak - 1e-3);
+    });
+
+    it("44.1 kHz mono is handled with rate-adapted K-weighting", {
+        timeout: 30000,
+    }, async () => {
+        const sr = 44100;
+        const doc = buildDoc([sine(0.25, 1000, sr, 4)], sr);
+        const r = await new LoudnessMeter().analyze(doc);
+        expect(Number.isFinite(r.lufs)).toBe(true);
+        expect(Number.isFinite(r.truePeak)).toBe(true);
+    });
+});