Initial commit

lib/config/audio-config.ts

@@ -0,0 +1,75 @@
+// 音频配置管理 - 简化版
+export interface AudioFormat {
+  mimeType: string;
+  extension: string;
+  codec: string;
+  quality: "low" | "medium" | "high" | "lossless";
+  maxBitrate: number;
+}
+
+// 支持的音频格式配置
+export const SUPPORTED_AUDIO_FORMATS: Record<string, AudioFormat> = {
+  webm: {
+    mimeType: "audio/webm;codecs=opus",
+    extension: ".webm",
+    codec: "opus",
+    quality: "high",
+    maxBitrate: 128000,
+  },
+  ogg: {
+    mimeType: "audio/ogg;codecs=opus",
+    extension: ".ogg",
+    codec: "opus",
+    quality: "high",
+    maxBitrate: 192000,
+  },
+  aac: {
+    mimeType: "audio/aac",
+    extension: ".aac",
+    codec: "aac",
+    quality: "high",
+    maxBitrate: 256000,
+  },
+};
+
+// 获取浏览器支持的音频格式
+export function getSupportedFormats(): AudioFormat[] {
+  const supported: AudioFormat[] = [];
+
+  // 检查 WebM 支持
+  if (MediaRecorder.isTypeSupported("audio/webm;codecs=opus")) {
+    supported.push(SUPPORTED_AUDIO_FORMATS.webm);
+  }
+
+  // 检查 OGG 支持
+  if (MediaRecorder.isTypeSupported("audio/ogg;codecs=opus")) {
+    supported.push(SUPPORTED_AUDIO_FORMATS.ogg);
+  }
+
+  // 检查 AAC 支持
+  if (MediaRecorder.isTypeSupported("audio/aac")) {
+    supported.push(SUPPORTED_AUDIO_FORMATS.aac);
+  }
+
+  // 如果没有支持的格式，至少返回 WebM
+  if (supported.length === 0) {
+    supported.push(SUPPORTED_AUDIO_FORMATS.webm);
+  }
+
+  return supported;
+}
+
+// 获取最佳录音格式
+export function getBestRecordingFormat(): AudioFormat {
+  const supported = getSupportedFormats();
+  return supported[0] || SUPPORTED_AUDIO_FORMATS.webm;
+}
+
+// 格式化文件大小
+export function formatFileSize(bytes: number): string {
+  if (bytes === 0) return "0 B";
+  const k = 1024;
+  const sizes = ["B", "KB", "MB", "GB"];
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + " " + sizes[i];
+}

lib/config/index.ts

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+// 环境变量验证
+const validateEnv = () => {
+  const requiredEnvVars = ["DATABASE_URL", "NEXTAUTH_SECRET", "NEXTAUTH_URL"];
+
+  const missingVars = requiredEnvVars.filter(
+    (varName) => !process.env[varName]
+  );
+
+  if (missingVars.length > 0) {
+    throw new Error(`缺少必需的环境变量: ${missingVars.join(", ")}`);
+  }
+};
+
+// 在开发环境中验证环境变量
+if (process.env.NODE_ENV === "development") {
+  validateEnv();
+}
+
+export const config = {
+  app: {
+    name: "录音应用",
+    version: "1.0.0",
+    environment: process.env.NODE_ENV || "development",
+  },
+
+  database: {
+    url: process.env.DATABASE_URL!,
+  },
+
+  auth: {
+    secret: process.env.NEXTAUTH_SECRET!,
+    url: process.env.NEXTAUTH_URL!,
+    google: {
+      clientId: process.env.GOOGLE_CLIENT_ID,
+      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
+    },
+  },
+
+  upload: {
+    maxFileSize: 50 * 1024 * 1024, // 50MB
+    allowedTypes: ["audio/webm", "audio/mp3", "audio/ogg", "audio/aac"],
+    uploadDir: "public/recordings",
+  },
+
+  api: {
+    rateLimit: {
+      windowMs: 15 * 60 * 1000, // 15 minutes
+      max: 100, // limit each IP to 100 requests per windowMs
+    },
+  },
+
+  features: {
+    audioVisualization: true,
+    recordingPause: true,
+    fileDownload: true,
+    userSettings: true,
+  },
+} as const;
+
+export type Config = typeof config;