[teamai] Push 87 resource(s) from XingfenD

2026-09-10 16:10:45 +08:00
parent 425c9c078a
commit 65c04def51
1314 changed files with 211681 additions and 0 deletions
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+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { BGM_BED_VOLUME, BGM_SILENT_VOLUME, bgmDefaultVolume } from "./bgm.mjs";
+
+// Regression: narrated pipelines used to ship BGM at 0.8 (≈ -2 dB), ~16 dB
+// hotter than a music bed under a voice should be. The default under narration
+// must be a proper bed (≈ -18 dB); a silent film keeps the louder default.
+
+const dbfs = (linear) => 20 * Math.log10(linear);
+
+test("BGM under narration is a bed near -18 dB", () => {
+  assert.equal(bgmDefaultVolume(true), BGM_BED_VOLUME);
+  assert.equal(BGM_BED_VOLUME, 0.12);
+  const db = dbfs(BGM_BED_VOLUME);
+  assert.ok(db < -17 && db > -19, `bed should be ≈ -18 dB, got ${db.toFixed(1)} dB`);
+});
+
+test("a silent film (no voice) keeps BGM forward", () => {
+  assert.equal(bgmDefaultVolume(false), BGM_SILENT_VOLUME);
+  assert.equal(BGM_SILENT_VOLUME, 0.9);
+});
+
+test("the narrated default is well below the voice (≈ 0 dBFS)", () => {
+  // Voice sits at data-volume="1" (0 dBFS); the bed must be ~16+ dB under it.
+  const separation = dbfs(1) - dbfs(bgmDefaultVolume(true));
+  assert.ok(
+    separation >= 16,
+    `bed should sit ≥16 dB under the voice, got ${separation.toFixed(1)} dB`,
+  );
+});