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src/services/voicePreview.js

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+import { invoke, isTauri } from "@tauri-apps/api/core";
+import { ensureAppConfigReady } from "../config/videoPipeline.js";
+import { resolveAliyunVoiceId } from "./soundPromptStorage.js";
+
+const VOICE_PREVIEW_SCRIPT = "voice_preview.js";
+
+/** @type {Map<string, string>} cacheKey → data:audio URL */
+const previewUrlCache = new Map();
+
+function mimeFromPath(filePath) {
+  const lower = String(filePath || "").toLowerCase();
+  if (lower.endsWith(".mp3")) return "audio/mpeg";
+  if (lower.endsWith(".ogg")) return "audio/ogg";
+  return "audio/wav";
+}
+
+/**
+ * 将 Node 写入的本地音频转为可在 WebView 播放的 URL（避免 asset.localhost 不可用）
+ * @param {string} filePath
+ */
+async function localAudioToPlayableUrl(filePath) {
+  if (!isTauri()) {
+    throw new Error("请在 Tauri 桌面端使用试听功能");
+  }
+  const base64 = await invoke("read_local_file_base64", { path: filePath });
+  const mime = mimeFromPath(filePath);
+  return `data:${mime};base64,${base64}`;
+}
+
+/**
+ * 音色试听
+ * @param {{ listKey: string, title: string, aliyunVoiceId?: string, selectedVoiceId?: string }} opts
+ */
+export async function previewVoice(opts) {
+  const cfg = await ensureAppConfigReady();
+  if (!cfg.ok) {
+    return { ok: false, message: cfg.message };
+  }
+
+  const voice = String(
+    opts.aliyunVoiceId ||
+      resolveAliyunVoiceId(opts.selectedVoiceId || ""),
+  ).trim();
+  if (!voice) {
+    return { ok: false, message: "音色 ID 无效" };
+  }
+
+  const cacheKey = opts.listKey || "";
+  const memCached = cacheKey ? previewUrlCache.get(cacheKey) : null;
+  if (memCached) {
+    return { ok: true, audioSrc: memCached, cached: true };
+  }
+
+  try {
+    const result = await invoke("run_nodejs_script", {
+      scriptName: VOICE_PREVIEW_SCRIPT,
+      params: {
+        voice,
+        title: opts.title || "",
+        cacheKey: cacheKey || undefined,
+      },
+    });
+
+    if (!result?.success || !result?.audioPath) {
+      return {
+        ok: false,
+        message: String(result?.error || "试听失败，请重试"),
+      };
+    }
+
+    const audioSrc = await localAudioToPlayableUrl(result.audioPath);
+    if (cacheKey) {
+      previewUrlCache.set(cacheKey, audioSrc);
+    }
+    return {
+      ok: true,
+      audioSrc,
+      audioPath: result.audioPath,
+      cached: Boolean(result.cached),
+    };
+  } catch (err) {
+    const msg = err instanceof Error ? err.message : String(err || "未知错误");
+    return { ok: false, message: `试听失败: ${msg}` };
+  }
+}