feat: build reproducible dataset editor

2026-08-28 10:46:33 +09:00
parent 6a1197d60e
commit 08fcf578de
16 changed files with 2579 additions and 11 deletions
@@ -0,0 +1,102 @@
+import { estimateSceneMix, MAX_MIX_WORKING_BYTES } from "/packages/acoustics-core/mixdown.js";
+
+export function createAudioRuntime() {
+  let worker = null;
+  let rejectWorker = null;
+  let playbackContext = null;
+  let playbackSource = null;
+
+  function cancelMix() {
+    if (!worker) return false;
+    worker.terminate();
+    worker = null;
+    const reject = rejectWorker;
+    rejectWorker = null;
+    reject?.(new DOMException("사용자가 mix 생성을 취소했습니다.", "AbortError"));
+    return true;
+  }
+
+  function renderMix(scene, assetBuffers) {
+    if (worker) throw new Error("이미 확인용 mix를 만들고 있습니다.");
+    const estimate = estimateSceneMix(scene, assetBuffers);
+    const crossThreadBytes = estimate.workingBytes + estimate.assetBytes;
+    if (crossThreadBytes > MAX_MIX_WORKING_BYTES) {
+      throw new Error(
+        `decode buffer와 Worker 복사본을 포함한 예상 메모리 ${(crossThreadBytes / 1024 ** 2).toFixed(1)} MiB가 ` +
+          `${(MAX_MIX_WORKING_BYTES / 1024 ** 2).toFixed(0)} MiB 한도를 넘습니다.`,
+      );
+    }
+    return new Promise((resolve, reject) => {
+      const currentWorker = new Worker("/apps/dataset-builder/mix-worker.js", { type: "module" });
+      worker = currentWorker;
+      rejectWorker = reject;
+      currentWorker.addEventListener("message", ({ data }) => {
+        if (worker !== currentWorker) return;
+        worker = null;
+        rejectWorker = null;
+        currentWorker.terminate();
+        if (data.ok) resolve(data.result);
+        else reject(new Error(data.message));
+      });
+      currentWorker.addEventListener("error", (event) => {
+        if (worker !== currentWorker) return;
+        worker = null;
+        rejectWorker = null;
+        currentWorker.terminate();
+        reject(new Error(event.message || "mix Worker가 중단되었습니다."));
+      });
+      currentWorker.postMessage({ scene, assetBuffers: [...assetBuffers] });
+    });
+  }
+
+  function stopPlayback() {
+    if (!playbackSource) return false;
+    playbackSource.onended = null;
+    try {
+      playbackSource.stop();
+    } catch {
+      // 이미 끝난 source는 정리만 한다.
+    }
+    playbackSource.disconnect();
+    playbackSource = null;
+    return true;
+  }
+
+  async function play(result, onEnded) {
+    stopPlayback();
+    playbackContext ??= new AudioContext();
+    await playbackContext.resume();
+    const buffer = playbackContext.createBuffer(1, result.samples.length, result.sampleRate);
+    buffer.copyToChannel(result.samples, 0);
+    playbackSource = playbackContext.createBufferSource();
+    playbackSource.buffer = buffer;
+    playbackSource.connect(playbackContext.destination);
+    playbackSource.onended = () => {
+      playbackSource?.disconnect();
+      playbackSource = null;
+      onEnded?.();
+    };
+    playbackSource.start();
+  }
+
+  function dispose() {
+    cancelMix();
+    stopPlayback();
+    playbackContext?.close();
+    playbackContext = null;
+  }
+
+  return {
+    cancelMix,
+    dispose,
+    get isMixing() {
+      return Boolean(worker);
+    },
+    get isPlaying() {
+      return Boolean(playbackSource);
+    },
+    play,
+    renderMix,
+    stopPlayback,
+  };
+}