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[key: string]: string } = {};\n  if (headerEndIndex !== -1) {\n    const headerString = messageString.substring(0, headerEndIndex);\n    const headerLines = headerString.split('\\r\\n');\n    for (const line of headerLines) {\n      const [key, value] = line.split(':', 2);\n      if (key && value) {\n        headers[key] = value.trim();\n      }\n    }\n  }\n\n  const headerByteLength = new TextEncoder().encode(messageString.substring(0, headerEndIndex + 4)).length;\n  return [headers, message.slice(headerByteLength)];\n}\n\n/**\n * Parses binary WebSocket messages to extract headers and data.\n * Uses Uint8Array for universal compatibility.\n */\nexport function getHeadersAndDataFromBinary(message: Uint8Array): [{ [key: string]: string }, Uint8Array] {\n  if (message.length < 2) {\n    throw new Error('Message too short to contain header length');\n  }\n\n  const headerLength = (message[0] << 8) | message[1]; // Read big-endian uint16\n  const headers: { [key: string]: string } = {};\n\n  if (headerLength > 0 && headerLength + 2 <= message.length) {\n    const headerBytes = message.slice(2, headerLength + 2);\n    const headerString = new TextDecoder().decode(headerBytes);\n    const headerLines = headerString.split('\\r\\n');\n    for (const line of headerLines) {\n      const [key, value] = line.split(':', 2);\n      if (key && value) {\n        headers[key] = value.trim();\n      }\n    }\n  }\n\n  return [headers, message.slice(headerLength + 2)];\n}\n\n/**\n * Converts a date to the expected string format for WebSocket messages.\n */\nexport function dateToString(date?: Date): string {\n  if (!date) {\n    date = new Date();\n  }\n  return date.toISOString().replace(/[-:.]/g, '').slice(0, -1);\n}\n\n/**\n * Removes characters that are incompatible with SSML.\n * Preserves essential punctuation (.?;:!,) for natural speech pauses.\n * XML special characters (&<>\"') are handled by the escape() function.\n */\nexport function removeIncompatibleCharacters(str: string): string {\n  // Keep essential punctuation for natural speech: .?;:!,\n  // Remove characters that could break SSML structure or cause parsing issues\n  const chars_to_remove = \"*/()[]{}$%^@#+=|\\\\~`><\\\"&\";\n  let clean_str = str;\n  for (const char of chars_to_remove) {\n    clean_str = clean_str.replace(new RegExp('\\\\' + char, 'g'), '');\n  }\n  return clean_str;\n}\n\n/**\n * Creates SSML from TTS configuration and text.\n * Compatible with original mkssml function signature.\n */\nexport function mkssml(tc: TTSConfig, escapedText: string | Uint8Array): string {\n  const text = escapedText instanceof Uint8Array ? new TextDecoder().decode(escapedText) : escapedText;\n  return (\n    \"<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>\"\n    + `<voice name='${tc.voice}'>`\n    + `<prosody pitch='${tc.pitch}' rate='${tc.rate}' volume='${tc.volume}'>`\n    + `${text}`\n    + \"</prosody>\"\n    + \"</voice>\"\n    + \"</speak>\"\n  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the client and server clocks are significantly out of sync.\n */\nexport class SkewAdjustmentError extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"SkewAdjustmentError\";\n  }\n}\n\n/**\n * Exception raised when an unknown response is received from the TTS service.\n * This indicates an unexpected message type or format that the client cannot handle.\n */\nexport class UnknownResponse extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"UnknownResponse\";\n  }\n}\n\n/**\n * Exception raised when an unexpected response is received from the TTS service.\n * This indicates a response that doesn't match the expected protocol flow.\n */\nexport class UnexpectedResponse extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"UnexpectedResponse\";\n  }\n}\n\n/**\n * Exception raised when no audio data is received during synthesis.\n * This typically indicates a problem with the synthesis request or service.\n */\nexport class NoAudioReceived extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"NoAudioReceived\";\n  }\n}\n\n/**\n * Exception raised when there's an error with the WebSocket connection.\n * This can occur during connection establishment, data transmission, or connection closure.\n */\nexport class WebSocketError extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"WebSocketError\";\n  }\n}\n\n/**\n * Exception raised when an invalid value is provided to a function or method.\n * This is typically used for input validation errors.\n */\nexport class ValueError extends EdgeTTSException {\n  constructor(message: string) {\n    super(message);\n    this.name = \"ValueError\";\n  }\n} ","import { ValueError } from \"./exceptions\";\n\n/**\n * Interface defining the configuration options for TTS synthesis.\n */\nexport interface ITTSConfig {\n  /** Voice name to use for synthesis */\n  voice: string;\n  /** Speech rate adjustment (e.g., \"+20%\", \"-10%\") */\n  rate: string;\n  /** Volume level adjustment (e.g., \"+50%\", \"-25%\") */\n  volume: string;\n  /** Pitch adjustment in Hz (e.g., \"+5Hz\", \"-10Hz\") */\n  pitch: string;\n}\n\n/**\n * Configuration class for TTS synthesis parameters.\n * Handles voice name normalization and parameter validation.\n * \n * @example\n * ```typescript\n * const config = new TTSConfig({\n *   voice: 'en-US-EmmaMultilingualNeural',\n *   rate: '+20%',\n *   volume: '+10%',\n *   pitch: '+5Hz'\n * });\n * ```\n */\nexport class TTSConfig implements ITTSConfig {\n  public voice: string;\n  public rate: string;\n  public volume: string;\n  public pitch: string;\n\n  /**\n   * Creates a new TTSConfig instance with the specified parameters.\n   * \n   * @param options - Configuration options\n   * @param options.voice - Voice name (supports both short and full formats)\n   * @param options.rate - Speech rate adjustment (default: \"+0%\")\n   * @param options.volume - Volume adjustment (default: \"+0%\") \n   * @param options.pitch - Pitch adjustment (default: \"+0Hz\")\n   * @throws {ValueError} If any parameter has an invalid format\n   */\n  constructor({\n    voice,\n    rate = \"+0%\",\n    volume = \"+0%\",\n    pitch = \"+0Hz\",\n  }: {\n    voice: string,\n    rate?: string,\n    volume?: string,\n    pitch?: string,\n  }) {\n    this.voice = voice;\n    this.rate = rate;\n    this.volume = volume;\n    this.pitch = pitch;\n\n    this.validate();\n  }\n\n  private validate() {\n    // Voice validation and transformation\n    const match = /^([a-z]{2,})-([A-Z]{2,})-(.+Neural)$/.exec(this.voice);\n    if (match) {\n      const [, lang] = match;\n      let [, , region, name] = match;\n      if (name.includes('-')) {\n        const parts = name.split('-');\n        region += `-${parts[0]}`;\n        name = parts[1];\n      }\n      this.voice = `Microsoft Server Speech Text to Speech Voice (${lang}-${region}, ${name})`;\n    }\n\n    TTSConfig.validateStringParam(\n      \"voice\",\n      this.voice,\n      /^Microsoft Server Speech Text to Speech Voice \\(.+,.+\\)$/\n    );\n    TTSConfig.validateStringParam(\"rate\", this.rate, /^[+-]\\d+%$/);\n    TTSConfig.validateStringParam(\"volume\", this.volume, /^[+-]\\d+%$/);\n    TTSConfig.validateStringParam(\"pitch\", this.pitch, /^[+-]\\d+Hz$/);\n  }\n\n  private static validateStringParam(paramName: string, paramValue: string, pattern: RegExp) {\n    if (typeof paramValue !== 'string') {\n      throw new TypeError(`${paramName} must be a string`);\n    }\n    if (!pattern.test(paramValue)) {\n      throw new ValueError(`Invalid ${paramName} '${paramValue}'.`);\n    }\n  }\n} ","/** Base URL for Microsoft Edge TTS service endpoints */\nexport const BASE_URL = \"speech.platform.bing.com/consumer/speech/synthesize/readaloud\";\n\n/** Trusted client token used for authentication with the TTS service */\nexport const TRUSTED_CLIENT_TOKEN = \"6A5AA1D4EAFF4E9FB37E23D68491D6F4\";\n\n/** WebSocket URL for TTS streaming synthesis */\nexport const WSS_URL = `wss://${BASE_URL}/edge/v1?TrustedClientToken=${TRUSTED_CLIENT_TOKEN}`;\n\n/** HTTP URL for fetching available voices list */\nexport const VOICE_LIST_URL = `https://${BASE_URL}/voices/list?trustedclienttoken=${TRUSTED_CLIENT_TOKEN}`;\n\n/** Default voice to use when none is specified */\nexport const DEFAULT_VOICE = \"en-US-EmmaMultilingualNeural\";\n\n/** Version string for Chromium browser emulation */\nexport const CHROMIUM_FULL_VERSION = \"143.0.3650.75\";\n\n/** Major version number extracted from the full Chromium version */\nexport const CHROMIUM_MAJOR_VERSION = CHROMIUM_FULL_VERSION.split(\".\")[0];\n\n/** Security token version for API authentication */\nexport const SEC_MS_GEC_VERSION = `1-${CHROMIUM_FULL_VERSION}`;\n\n/** Base HTTP headers for API requests, mimicking a real browser */\nexport const BASE_HEADERS = {\n  \"User-Agent\": `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/${CHROMIUM_MAJOR_VERSION}.0.0.0 Safari/537.36 Edg/${CHROMIUM_MAJOR_VERSION}.0.0.0`,\n  \"Accept-Encoding\": \"gzip, deflate, br, zstd\",\n  \"Accept-Language\": \"en-US,en;q=0.9\",\n};\n\n/** HTTP headers specific to WebSocket connection requests */\nexport const WSS_HEADERS = {\n  ...BASE_HEADERS,\n  \"Pragma\": \"no-cache\",\n  \"Cache-Control\": \"no-cache\",\n  \"Origin\": \"chrome-extension://jdiccldimpdaibmpdkjnbmckianbfold\",\n  \"Sec-WebSocket-Version\": \"13\",\n};\n\n/** HTTP headers specific to voice list API requests */\nexport const VOICE_HEADERS = {\n  ...BASE_HEADERS,\n  \"Authority\": \"speech.platform.bing.com\",\n  \"Sec-CH-UA\": `\" Not;A Brand\";v=\"99\", \"Microsoft Edge\";v=\"${CHROMIUM_MAJOR_VERSION}\", \"Chromium\";v=\"${CHROMIUM_MAJOR_VERSION}\"`,\n  \"Sec-CH-UA-Mobile\": \"?0\",\n  \"Accept\": \"*/*\",\n  \"Sec-Fetch-Site\": \"none\",\n  \"Sec-Fetch-Mode\": \"cors\",\n  \"Sec-Fetch-Dest\": \"empty\",\n}; ","import { TRUSTED_CLIENT_TOKEN } from './constants';\nimport { SkewAdjustmentError } from \"./exceptions\";\n\nconst WIN_EPOCH = 11644473600;\nconst S_TO_NS = 1e9;\n\n/**\n * Isomorphic DRM class that works in both Node.js and browsers.\n * Uses appropriate crypto APIs based on the environment.\n */\nexport class IsomorphicDRM {\n  private static clockSkewSeconds = 0.0;\n\n  static adjClockSkewSeconds(skewSeconds: number) {\n    IsomorphicDRM.clockSkewSeconds += skewSeconds;\n  }\n\n  static getUnixTimestamp(): number {\n    return Date.now() / 1000 + IsomorphicDRM.clockSkewSeconds;\n  }\n\n  static parseRfc2616Date(date: string): number | null {\n    try {\n      return new Date(date).getTime() / 1000;\n    } catch (e) {\n      return null;\n    }\n  }\n\n  static handleClientResponseError(response: { status: number; headers: any }) {\n    let serverDate: string | null = null;\n\n    if ('headers' in response && typeof response.headers === 'object') {\n      if ('get' in response.headers && typeof response.headers.get === 'function') {\n        // Fetch Response object\n        serverDate = response.headers.get(\"date\");\n      } else {\n        // Plain object with headers\n        const headers = response.headers as Record<string, string>;\n        serverDate = headers[\"date\"] || headers[\"Date\"];\n      }\n    }\n\n    if (!serverDate) {\n      throw new SkewAdjustmentError(\"No server date in headers.\");\n    }\n    const serverDateParsed = IsomorphicDRM.parseRfc2616Date(serverDate);\n    if (serverDateParsed === null) {\n      throw new SkewAdjustmentError(`Failed to parse server date: ${serverDate}`);\n    }\n    const clientDate = IsomorphicDRM.getUnixTimestamp();\n    IsomorphicDRM.adjClockSkewSeconds(serverDateParsed - clientDate);\n  }\n\n  static async generateSecMsGec(): Promise<string> {\n    let ticks = IsomorphicDRM.getUnixTimestamp();\n    ticks += WIN_EPOCH;\n    ticks -= ticks % 300;\n    ticks *= S_TO_NS / 100;\n\n    const strToHash = `${ticks.toFixed(0)}${TRUSTED_CLIENT_TOKEN}`;\n\n    // Use Web Crypto API directly - available in both Node.js 16+ and browsers\n    if (!globalThis.crypto || !globalThis.crypto.subtle) {\n      throw new Error('Web Crypto API not available');\n    }\n\n    const encoder = new TextEncoder();\n    const data = encoder.encode(strToHash);\n    const hashBuffer = await globalThis.crypto.subtle.digest('SHA-256', data);\n    const hashArray = Array.from(new Uint8Array(hashBuffer));\n    return hashArray.map(b => b.toString(16).padStart(2, '0')).join('').toUpperCase();\n  }\n\n  /**\n   * Generates a random MUID (Machine Unique Identifier).\n   * @returns Uppercase 32-character hex string\n   */\n  static generateMuid(): string {\n    const bytes = new Uint8Array(16);\n    globalThis.crypto.getRandomValues(bytes);\n    return Array.from(bytes).map(b => b.toString(16).padStart(2, '0')).join('').toUpperCase();\n  }\n\n  /**\n   * Returns a copy of the given headers with a MUID cookie added.\n   * @param headers - The original headers\n   * @returns New headers object with Cookie header containing the MUID\n   */\n  static headersWithMuid(headers: Record<string, string>): Record<string, string> {\n    return {\n      ...headers,\n      Cookie: `muid=${IsomorphicDRM.generateMuid()};`,\n    };\n  }\n} ","import {\n  connectId,\n  dateToString,\n  escape,\n  mkssml,\n  removeIncompatibleCharacters,\n  splitTextByByteLength,\n  ssmlHeadersPlusData,\n  unescape\n} from './isomorphic-utils';\nimport {\n  NoAudioReceived,\n  UnexpectedResponse,\n  UnknownResponse,\n  WebSocketError\n} from \"./exceptions\";\nimport { TTSConfig } from './tts_config';\nimport { DEFAULT_VOICE, WSS_URL, SEC_MS_GEC_VERSION, WSS_HEADERS } from './constants';\nimport { IsomorphicDRM } from './isomorphic-drm';\n\n// Isomorphic buffer handling - works in both Node.js and browsers\nconst IsomorphicBuffer = {\n  from: (input: string | ArrayBuffer | Uint8Array, encoding?: string): Uint8Array => {\n    if (typeof input === 'string') {\n      return new TextEncoder().encode(input);\n    } else if (input instanceof ArrayBuffer) {\n      return new Uint8Array(input);\n    } else if (input instanceof Uint8Array) {\n      return input;\n    }\n    throw new Error('Unsupported input type for IsomorphicBuffer.from');\n  },\n\n  concat: (arrays: Uint8Array[]): Uint8Array => {\n    const totalLength = arrays.reduce((sum, arr) => sum + arr.length, 0);\n    const result = new Uint8Array(totalLength);\n    let offset = 0;\n    for (const arr of arrays) {\n      result.set(arr, offset);\n      offset += arr.length;\n    }\n    return result;\n  },\n\n  isBuffer: (obj: any): obj is Uint8Array => {\n    return obj instanceof Uint8Array;\n  },\n\n  toString: (buffer: Uint8Array, encoding?: string): string => {\n    return new TextDecoder(encoding || 'utf-8').decode(buffer);\n  }\n};\n\n// Isomorphic versions of utility functions that handle both Buffer and Uint8Array\nfunction isomorphicGetHeadersAndDataFromText(message: Uint8Array): [{ [key: string]: string }, Uint8Array] {\n  const messageString = IsomorphicBuffer.toString(message);\n  const headerEndIndex = messageString.indexOf('\\r\\n\\r\\n');\n\n  const headers: { [key: string]: string } = {};\n  if (headerEndIndex !== -1) {\n    const headerString = messageString.substring(0, headerEndIndex);\n    const headerLines = headerString.split('\\r\\n');\n    for (const line of headerLines) {\n      const [key, value] = line.split(':', 2);\n      if (key && value) {\n        headers[key] = value.trim();\n      }\n    }\n  }\n\n  const headerByteLength = new TextEncoder().encode(messageString.substring(0, headerEndIndex + 4)).length;\n  return [headers, message.slice(headerByteLength)];\n}\n\nfunction isomorphicGetHeadersAndDataFromBinary(message: Uint8Array): [{ [key: string]: string }, Uint8Array] {\n  if (message.length < 2) {\n    throw new Error('Message too short to contain header length');\n  }\n\n  const headerLength = (message[0] << 8) | message[1]; // Read big-endian uint16\n  const headers: { [key: string]: string } = {};\n\n  if (headerLength > 0 && headerLength + 2 <= message.length) {\n    const headerBytes = message.slice(2, headerLength + 2);\n    const headerString = IsomorphicBuffer.toString(headerBytes);\n    const headerLines = headerString.split('\\r\\n');\n    for (const line of headerLines) {\n      const [key, value] = line.split(':', 2);\n      if (key && value) {\n        headers[key] = value.trim();\n      }\n    }\n  }\n\n  return [headers, message.slice(headerLength + 2)];\n}\n\n// Isomorphic state interface using Uint8Array\ninterface IsomorphicCommunicateState {\n  partialText: Uint8Array;\n  offsetCompensation: number;\n  lastDurationOffset: number;\n  streamWasCalled: boolean;\n}\n\n// Isomorphic TTSChunk type using Uint8Array\ninterface IsomorphicTTSChunk {\n  type: \"audio\" | \"WordBoundary\" | \"SentenceBoundary\";\n  data?: Uint8Array;\n  duration?: number;\n  offset?: number;\n  text?: string;\n}\n\n/**\n * Configuration options for the isomorphic Communicate class.\n */\nexport interface IsomorphicCommunicateOptions {\n  /** Voice to use for synthesis (e.g., \"en-US-EmmaMultilingualNeural\") */\n  voice?: string;\n  /** Speech rate adjustment (e.g., \"+20%\", \"-10%\") */\n  rate?: string;\n  /** Volume level adjustment (e.g., \"+50%\", \"-25%\") */\n  volume?: string;\n  /** Pitch adjustment in Hz (e.g., \"+5Hz\", \"-10Hz\") */\n  pitch?: string;\n  /** Proxy URL for requests (Node.js only) */\n  proxy?: string;\n  /** WebSocket connection timeout in milliseconds */\n  connectionTimeout?: number;\n}\n\n/**\n * Isomorphic Communicate class that works in both Node.js and browsers.\n * Uses isomorphic packages to provide consistent functionality across environments.\n * \n * @example\n * ```typescript\n * // Works in both Node.js and browsers (with CORS considerations)\n * const communicate = new IsomorphicCommunicate('Hello, world!', {\n *   voice: 'en-US-EmmaMultilingualNeural',\n * });\n * \n * for await (const chunk of communicate.stream()) {\n *   if (chunk.type === 'audio' && chunk.data) {\n *     // Handle audio data\n *   }\n * }\n * ```\n */\nexport class IsomorphicCommunicate {\n  private readonly ttsConfig: TTSConfig;\n  private readonly texts: Generator<Uint8Array>;\n  // Universal build - proxy and environment detection removed for compatibility\n\n  private state: IsomorphicCommunicateState = {\n    partialText: IsomorphicBuffer.from(''),\n    offsetCompensation: 0,\n    lastDurationOffset: 0,\n    streamWasCalled: false,\n  };\n\n  /**\n   * Creates a new isomorphic Communicate instance for text-to-speech synthesis.\n   * \n   * @param text - The text to synthesize\n   * @param options - Configuration options for synthesis\n   */\n  constructor(text: string, options: IsomorphicCommunicateOptions = {}) {\n    this.ttsConfig = new TTSConfig({\n      voice: options.voice || DEFAULT_VOICE,\n      rate: options.rate,\n      volume: options.volume,\n      pitch: options.pitch,\n    });\n\n    if (typeof text !== 'string') {\n      throw new TypeError('text must be a string');\n    }\n\n    // Create a generator that yields Uint8Array chunks instead of Buffer chunks\n    const processedText = escape(removeIncompatibleCharacters(text));\n    // const maxSize = calcMaxMesgSize(this.ttsConfig);\n    const maxSize = 4096;\n\n    this.texts = (function* () {\n      for (const chunk of splitTextByByteLength(processedText, maxSize)) {\n        // splitTextByByteLength returns strings, convert to Uint8Array\n        yield new TextEncoder().encode(chunk);\n      }\n    })();\n\n    // Note: proxy and connectionTimeout are not supported in universal builds\n    // for maximum compatibility across environments\n  }\n\n  private parseMetadata(data: Uint8Array): IsomorphicTTSChunk {\n    const metadata = JSON.parse(IsomorphicBuffer.toString(data));\n    for (const metaObj of metadata['Metadata']) {\n      const metaType = metaObj['Type'];\n      if (metaType === 'WordBoundary' || metaType === 'SentenceBoundary') {\n        const currentOffset = metaObj['Data']['Offset'] + this.state.offsetCompensation;\n        const currentDuration = metaObj['Data']['Duration'];\n        return {\n          type: metaType,\n          offset: currentOffset,\n          duration: currentDuration,\n          text: unescape(metaObj['Data']['text']['Text']),\n        };\n      }\n      if (metaType === 'SessionEnd') {\n        continue;\n      }\n      throw new UnknownResponse(`Unknown metadata type: ${metaType}`);\n    }\n    throw new UnexpectedResponse('No WordBoundary metadata found');\n  }\n\n  private async createWebSocket(url: string): Promise<WebSocket> {\n    // Handle WebSocket creation across different environments\n    const isNode = typeof globalThis !== 'undefined'\n      ? globalThis.process?.versions?.node !== undefined\n      : typeof process !== 'undefined' && process.versions?.node !== undefined;\n\n    if (isNode) {\n      // Node.js: Try to dynamically import ws library for better compatibility\n      try {\n        const { default: WS } = await import('ws');\n        return new WS(url, {\n          headers: IsomorphicDRM.headersWithMuid(WSS_HEADERS),\n        }) as any;\n      } catch (error) {\n        // Fall back to native Node.js WebSocket if ws not available\n        console.warn('ws library not available, using native WebSocket without headers');\n        return new WebSocket(url);\n      }\n    } else {\n      // Browser/Deno: Use native WebSocket\n      // Browsers automatically set appropriate headers like Origin\n      return new WebSocket(url);\n    }\n  }\n\n  private async * _stream(): AsyncGenerator<IsomorphicTTSChunk, void, unknown> {\n    const url = `${WSS_URL}&Sec-MS-GEC=${await IsomorphicDRM.generateSecMsGec()}&Sec-MS-GEC-Version=${SEC_MS_GEC_VERSION}&ConnectionId=${connectId()}`;\n\n    const websocket = await this.createWebSocket(url);\n    const messageQueue: (IsomorphicTTSChunk | Error | 'close')[] = [];\n    let resolveMessage: (() => void) | null = null;\n\n    // Handle different message event APIs\n    const handleMessage = (message: any, isBinary?: boolean) => {\n      // In browsers, message.data contains the data\n      const data = message.data || message;\n      const binary = isBinary ?? (data instanceof ArrayBuffer || data instanceof Uint8Array);\n\n      if (!binary && typeof data === 'string') {\n        // Text message\n        const [headers, parsedData] = isomorphicGetHeadersAndDataFromText(IsomorphicBuffer.from(data));\n\n        const path = headers['Path'];\n        if (path === 'audio.metadata') {\n          try {\n            const parsedMetadata = this.parseMetadata(parsedData);\n            this.state.lastDurationOffset = parsedMetadata.offset! + parsedMetadata.duration!;\n            messageQueue.push(parsedMetadata);\n          } catch (e) {\n            messageQueue.push(e as Error);\n          }\n        } else if (path === 'turn.end') {\n          this.state.offsetCompensation = this.state.lastDurationOffset;\n          // Add average padding typically added by the service to the end of the audio\n          this.state.offsetCompensation += 8_750_000;\n          websocket.close();\n        } else if (path !== 'response' && path !== 'turn.start') {\n          messageQueue.push(new UnknownResponse(`Unknown path received: ${path}`));\n        }\n      } else {\n        // Binary message - handle various binary data types across platforms\n        let bufferData: Uint8Array;\n\n        if (data instanceof ArrayBuffer) {\n          bufferData = IsomorphicBuffer.from(data);\n        } else if (data instanceof Uint8Array) {\n          bufferData = data;\n        } else if (typeof Buffer !== 'undefined' && data instanceof Buffer) {\n          // Node.js Buffer support\n          bufferData = new Uint8Array(data);\n        } else if (typeof Blob !== 'undefined' && data instanceof Blob) {\n          // Handle Blob from native Node.js WebSocket - process async\n          data.arrayBuffer().then(arrayBuffer => {\n            const blobBufferData = new Uint8Array(arrayBuffer);\n            processBinaryData(blobBufferData);\n          }).catch(error => {\n            messageQueue.push(new UnexpectedResponse(`Failed to process Blob data: ${error.message}`));\n            if (resolveMessage) resolveMessage();\n          });\n          return;\n        } else {\n          messageQueue.push(new UnexpectedResponse(`Unknown binary data type: ${typeof data} ${data.constructor?.name}`));\n          return;\n        }\n\n        processBinaryData(bufferData);\n      }\n\n      if (resolveMessage) resolveMessage();\n    };\n\n    const processBinaryData = (bufferData: Uint8Array) => {\n      if (bufferData.length < 2) {\n        messageQueue.push(new UnexpectedResponse('We received a binary message, but it is missing the header length.'));\n      } else {\n        const [headers, audioData] = isomorphicGetHeadersAndDataFromBinary(bufferData);\n\n        if (headers['Path'] !== 'audio') {\n          messageQueue.push(new UnexpectedResponse('Received binary message, but the path is not audio.'));\n        } else {\n          const contentType = headers['Content-Type'];\n          if (contentType !== 'audio/mpeg') {\n            if (audioData.length > 0) {\n              messageQueue.push(new UnexpectedResponse('Received binary message, but with an unexpected Content-Type.'));\n            }\n          } else if (audioData.length === 0) {\n            messageQueue.push(new UnexpectedResponse('Received binary message, but it is missing the audio data.'));\n          } else {\n            messageQueue.push({ type: 'audio', data: audioData });\n          }\n        }\n      }\n    };\n\n    // Use standard WebSocket event handlers that work universally\n    websocket.onmessage = handleMessage;\n    websocket.onerror = (error: any) => {\n      messageQueue.push(new WebSocketError(error.message || 'WebSocket error'));\n      if (resolveMessage) resolveMessage();\n    };\n    websocket.onclose = () => {\n      messageQueue.push('close');\n      if (resolveMessage) resolveMessage();\n    };\n\n    // Wait for connection\n    await new Promise<void>((resolve, reject) => {\n      const onOpen = () => resolve();\n      const onError = (error: any) => reject(error);\n\n      websocket.onopen = onOpen;\n      websocket.onerror = onError;\n    });\n\n    // Send configuration\n    websocket.send(\n      `X-Timestamp:${dateToString()}\\r\\n`\n      + 'Content-Type:application/json; charset=utf-8\\r\\n'\n      + 'Path:speech.config\\r\\n\\r\\n'\n      + '{\"context\":{\"synthesis\":{\"audio\":{\"metadataoptions\":{'\n      + '\"sentenceBoundaryEnabled\":\"false\",\"wordBoundaryEnabled\":\"true\"},'\n      + '\"outputFormat\":\"audio-24khz-48kbitrate-mono-mp3\"'\n      + '}}}}\\r\\n'\n    );\n\n    // Send SSML\n    websocket.send(\n      ssmlHeadersPlusData(\n        connectId(),\n        dateToString(),\n        mkssml(this.ttsConfig, IsomorphicBuffer.toString(this.state.partialText)),\n      )\n    );\n\n    // Process messages\n    let audioWasReceived = false;\n    while (true) {\n      if (messageQueue.length > 0) {\n        const message = messageQueue.shift()!;\n        if (message === 'close') {\n          if (!audioWasReceived) {\n            throw new NoAudioReceived('No audio was received.');\n          }\n          break;\n        } else if (message instanceof Error) {\n          throw message;\n        } else {\n          if (message.type === 'audio') audioWasReceived = true;\n          yield message;\n        }\n      } else {\n        // Use a more responsive wait mechanism\n        await new Promise<void>(resolve => {\n          resolveMessage = resolve;\n          // Add a small timeout to prevent indefinite waiting\n          setTimeout(resolve, 50);\n        });\n      }\n    }\n  }\n\n  /**\n   * Streams text-to-speech synthesis results using isomorphic WebSocket.\n   * Works in both Node.js and browsers (subject to CORS policy).\n   * \n   * @yields TTSChunk - Audio data or word boundary information\n   * @throws {Error} If called more than once\n   * @throws {NoAudioReceived} If no audio data is received\n   * @throws {WebSocketError} If WebSocket connection fails\n   */\n  async * stream(): AsyncGenerator<IsomorphicTTSChunk, void, unknown> {\n    if (this.state.streamWasCalled) {\n      throw new Error('stream can only be called once.');\n    }\n    this.state.streamWasCalled = true;\n\n    for (const partialText of this.texts) {\n      this.state.partialText = partialText;\n      for await (const message of this._stream()) {\n        yield message;\n      }\n    }\n  }\n} ","// Use native fetch API available in both Node.js 18+ and browsers\nimport { SEC_MS_GEC_VERSION, VOICE_HEADERS, VOICE_LIST_URL } from './constants';\nimport { IsomorphicDRM } from './isomorphic-drm';\nimport { Voice, VoicesManagerFind, VoicesManagerVoice } from './types';\n\n/**\n * Error class for fetch-related errors (isomorphic equivalent of AxiosError)\n */\nexport class FetchError extends Error {\n  response?: {\n    status: number;\n    headers: Record<string, string>;\n  };\n\n  constructor(message: string, response?: { status: number; headers: Record<string, string> }) {\n    super(message);\n    this.name = 'FetchError';\n    this.response = response;\n  }\n}\n\nasync function _listVoices(proxy?: string): Promise<Voice[]> {\n  const url = `${VOICE_LIST_URL}&Sec-MS-GEC=${await IsomorphicDRM.generateSecMsGec()}&Sec-MS-GEC-Version=${SEC_MS_GEC_VERSION}`;\n\n  const fetchOptions: RequestInit = {\n    headers: VOICE_HEADERS,\n  };\n\n  // Note: Proxy support in browsers is limited and handled differently\n  // In Node.js, we could potentially use a proxy agent with fetch\n  if (proxy) {\n    console.warn('Proxy support in isomorphic environment is limited. Consider using a backend proxy.');\n  }\n\n  try {\n    const response = await fetch(url, fetchOptions);\n\n    if (!response.ok) {\n      const headers: Record<string, string> = {};\n      response.headers.forEach((value, key) => {\n        headers[key] = value;\n      });\n\n      throw new FetchError(`HTTP ${response.status}`, {\n        status: response.status,\n        headers\n      });\n    }\n\n    const data: Voice[] = await response.json();\n\n    for (const voice of data) {\n      voice.VoiceTag.ContentCategories = voice.VoiceTag.ContentCategories.map(c => c.trim() as any);\n      voice.VoiceTag.VoicePersonalities = voice.VoiceTag.VoicePersonalities.map(p => p.trim() as any);\n    }\n\n    return data;\n  } catch (error) {\n    if (error instanceof FetchError) {\n      throw error;\n    }\n    // Convert other fetch errors to our FetchError format\n    throw new FetchError(error instanceof Error ? error.message : 'Unknown fetch error');\n  }\n}\n\n/**\n * Fetches all available voices from the Microsoft Edge TTS service (isomorphic version).\n * Works in both Node.js and browsers (subject to CORS policy).\n * \n * @param proxy - Optional proxy URL for the request (limited browser support)\n * @returns Promise resolving to array of available voices\n */\nexport async function listVoices(proxy?: string): Promise<Voice[]> {\n  try {\n    return await _listVoices(proxy);\n  } catch (e) {\n    if (e instanceof FetchError && e.response?.status === 403) {\n      IsomorphicDRM.handleClientResponseError(e.response);\n      return await _listVoices(proxy);\n    }\n    throw e;\n  }\n}\n\n/**\n * Isomorphic utility class for finding and filtering available voices.\n * Works in both Node.js and browsers (subject to CORS policy).\n * \n * @example\n * ```typescript\n * const voicesManager = await IsomorphicVoicesManager.create();\n * const englishVoices = voicesManager.find({ Language: 'en' });\n * ```\n */\nexport class IsomorphicVoicesManager {\n  private voices: VoicesManagerVoice[] = [];\n  private calledCreate = false;\n\n  /**\n   * Creates a new IsomorphicVoicesManager instance.\n   * \n   * @param customVoices - Optional custom voice list instead of fetching from API\n   * @param proxy - Optional proxy URL for API requests (limited browser support)\n   * @returns Promise resolving to IsomorphicVoicesManager instance\n   */\n  public static async create(customVoices?: Voice[], proxy?: string): Promise<IsomorphicVoicesManager> {\n    const manager = new IsomorphicVoicesManager();\n    const voices = customVoices ?? await listVoices(proxy);\n    manager.voices = voices.map(voice => ({\n      ...voice,\n      Language: voice.Locale.split('-')[0],\n    }));\n    manager.calledCreate = true;\n    return manager;\n  }\n\n  /**\n   * Finds voices matching the specified criteria.\n   * \n   * @param filter - Filter criteria for voice selection\n   * @returns Array of voices matching the filter\n   * @throws {Error} If called before create()\n   */\n  public find(filter: VoicesManagerFind): VoicesManagerVoice[] {\n    if (!this.calledCreate) {\n      throw new Error('IsomorphicVoicesManager.find() called before IsomorphicVoicesManager.create()');\n    }\n\n    return this.voices.filter(voice => {\n      return Object.entries(filter).every(([key, value]) => {\n        return voice[key as keyof VoicesManagerFind] === value;\n      });\n    });\n  }\n} ","import { IsomorphicCommunicate } from './isomorphic-communicate';\n\n/**\n * Options for controlling the voice prosody (rate, pitch, volume).\n */\nexport interface ProsodyOptions {\n  /**\n   * The speaking rate of the voice.\n   * Examples: \"+10.00%\", \"-20.00%\"\n   */\n  rate?: string;\n  /**\n   * The speaking volume of the voice.\n   * Examples: \"+15.00%\", \"-10.00%\"\n   */\n  volume?: string;\n  /**\n   * The speaking pitch of the voice.\n   * Examples: \"+20Hz\", \"-10Hz\"\n   */\n  pitch?: string;\n}\n\n/**\n * Represents a single word boundary with its timing and text.\n * The API provides timing in 100-nanosecond units.\n */\nexport interface WordBoundary {\n  /**\n   * The offset from the beginning of the audio stream in 100-nanosecond units.\n   */\n  offset: number;\n  /**\n   * The duration of the word in 100-nanosecond units.\n   */\n  duration: number;\n  /**\n   * The text of the spoken word.\n   */\n  text: string;\n}\n\n/**\n * The final result of the synthesis process.\n */\nexport interface SynthesisResult {\n  /**\n   * The generated audio as a Blob, which can be used in an <audio> element.\n   */\n  audio: Blob;\n  /**\n   * An array of word boundaries containing timing and text for creating subtitles.\n   */\n  subtitle: WordBoundary[];\n}\n\n// Browser-compatible buffer concatenation utility with improved audio handling\nfunction concatUint8Arrays(arrays: Uint8Array[]): Uint8Array {\n  if (arrays.length === 0) return new Uint8Array(0);\n  if (arrays.length === 1) return arrays[0];\n\n  // For audio data, we want to ensure smooth concatenation\n  const totalLength = arrays.reduce((sum, arr) => sum + arr.length, 0);\n  const result = new Uint8Array(totalLength);\n  let offset = 0;\n\n  for (const arr of arrays) {\n    if (arr.length > 0) {\n      result.set(arr, offset);\n      offset += arr.length;\n    }\n  }\n\n  return result;\n}\n\n/**\n * Isomorphic Edge TTS class that works in both Node.js and browser environments.\n * Uses isomorphic implementations to avoid platform-specific dependencies.\n */\nexport class IsomorphicEdgeTTS {\n  public text: string;\n  public voice: string;\n  public rate: string;\n  public volume: string;\n  public pitch: string;\n\n  /**\n   * @param text The text to be synthesized.\n   * @param voice The voice to use for synthesis.\n   * @param options Prosody options (rate, volume, pitch).\n   */\n  constructor(\n    text: string,\n    voice = \"Microsoft Server Speech Text to Speech Voice (en-US, EmmaMultilingualNeural)\",\n    options: ProsodyOptions = {}\n  ) {\n    this.text = text;\n    this.voice = voice;\n    this.rate = options.rate || \"+0%\";\n    this.volume = options.volume || \"+0%\";\n    this.pitch = options.pitch || \"+0Hz\";\n  }\n\n  /**\n   * Initiates the synthesis process using isomorphic implementations.\n   * @returns A promise that resolves with the synthesized audio and subtitle data.\n   */\n  public async synthesize(): Promise<SynthesisResult> {\n    const communicate = new IsomorphicCommunicate(this.text, {\n      voice: this.voice,\n      rate: this.rate,\n      volume: this.volume,\n      pitch: this.pitch,\n    });\n\n    const audioChunks: Uint8Array[] = [];\n    const wordBoundaries: WordBoundary[] = [];\n\n    for await (const chunk of communicate.stream()) {\n      if (chunk.type === 'audio' && chunk.data) {\n        audioChunks.push(chunk.data);\n      } else if (chunk.type === 'WordBoundary' && chunk.offset !== undefined && chunk.duration !== undefined && chunk.text !== undefined) {\n        wordBoundaries.push({\n          offset: chunk.offset,\n          duration: chunk.duration,\n          text: chunk.text,\n        });\n      }\n    }\n\n    // Convert Uint8Array chunks to Blob (works in both Node.js and browsers)\n    const audioBuffer = concatUint8Arrays(audioChunks);\n    // TS 5.5+ tightens BlobPart types to require ArrayBuffer-backed views.\n    // Our Uint8Array is ArrayBuffer-backed, so cast for type compatibility.\n    const audioBlob = new Blob([\n      audioBuffer as unknown as ArrayBufferView<ArrayBuffer>\n    ], { type: \"audio/mpeg\" });\n\n    return {\n      audio: audioBlob,\n      subtitle: wordBoundaries,\n    };\n  }\n}\n\n// ==================================================================================\n// Subtitle Generation Utilities (Isomorphic - works everywhere)\n// ==================================================================================\n\n/**\n * Formats a time value from 100-nanosecond units into a VTT or SRT timestamp string.\n * @param timeIn100ns The time value in 100-nanosecond units.\n * @param format The subtitle format, which determines the decimal separator.\n * @returns A formatted timestamp string (e.g., \"00:01:23.456\").\n */\nfunction formatTimestamp(timeIn100ns: number, format: 'vtt' | 'srt'): string {\n  const totalSeconds = Math.floor(timeIn100ns / 10000000);\n  const hours = Math.floor(totalSeconds / 3600);\n  const minutes = Math.floor((totalSeconds % 3600) / 60);\n  const seconds = totalSeconds % 60;\n  const milliseconds = Math.floor((timeIn100ns % 10000000) / 10000);\n  const separator = format === 'vtt' ? '.' : ',';\n  return `${padNumber(hours)}:${padNumber(minutes)}:${padNumber(seconds)}${separator}${padNumber(milliseconds, 3)}`;\n}\n\n/**\n * Pads a number with leading zeros to a specified length.\n * @param num The number to pad.\n * @param length The desired length of the string.\n * @returns The padded number as a string.\n */\nfunction padNumber(num: number, length = 2): string {\n  return num.toString().padStart(length, '0');\n}\n\n/**\n * Creates a subtitle file content in VTT (WebVTT) format.\n * @param wordBoundaries The array of word boundary data.\n * @returns A string containing the VTT formatted subtitles.\n */\nexport function createVTT(wordBoundaries: WordBoundary[]): string {\n  let vttContent = \"WEBVTT\\n\\n\";\n  wordBoundaries.forEach((word, index) => {\n    const startTime = formatTimestamp(word.offset, 'vtt');\n    const endTime = formatTimestamp(word.offset + word.duration, 'vtt');\n    vttContent += `${index + 1}\\n`;\n    vttContent += `${startTime} --> ${endTime}\\n`;\n    vttContent += `${word.text}\\n\\n`;\n  });\n  return vttContent;\n}\n\n/**\n * Creates a subtitle file content in SRT (SubRip) format.\n * @param wordBoundaries The array of word boundary data.\n * @returns A string containing the SRT formatted subtitles.\n */\nexport function createSRT(wordBoundaries: WordBoundary[]): string {\n  let srtContent = \"\";\n  wordBoundaries.forEach((word, index) => {\n    const startTime = formatTimestamp(word.offset, 'srt');\n    const endTime = formatTimestamp(word.offset + word.duration, 'srt');\n    srtContent += `${index + 1}\\n`;\n    srtContent += `${startTime} --> ${endTime}\\n`;\n    srtContent += `${word.text}\\n\\n`;\n  });\n  return srtContent;\n} \n","import { TTSChunk } from \"./types\";\nimport { ValueError } from \"./exceptions\";\n\ninterface Cue {\n  index: number;\n  start: number; // in seconds\n  end: number; // in seconds\n  content: string;\n}\n\nfunction formatTime(seconds: number): string {\n  const h = Math.floor(seconds / 3600);\n  const m = Math.floor((seconds % 3600) / 60);\n  const s = Math.floor(seconds % 60);\n  const ms = Math.round((seconds - Math.floor(seconds)) * 1000);\n\n  const pad = (num: number, size = 2) => num.toString().padStart(size, '0');\n\n  return `${pad(h)}:${pad(m)}:${pad(s)},${pad(ms, 3)}`;\n}\n\n/**\n * Utility class for generating SRT subtitles from WordBoundary events.\n * \n * @example\n * ```typescript\n * const subMaker = new SubMaker();\n * \n * for await (const chunk of communicate.stream()) {\n *   if (chunk.type === 'WordBoundary') {\n *     subMaker.feed(chunk);\n *   }\n * }\n * \n * const srt = subMaker.getSrt();\n * ```\n */\nexport class SubMaker {\n  private cues: Cue[] = [];\n\n  /**\n   * Adds a WordBoundary chunk to the subtitle maker.\n   * \n   * @param msg - Must be a WordBoundary type chunk with offset, duration, and text\n   * @throws {ValueError} If chunk is not a WordBoundary with required fields\n   */\n  feed(msg: TTSChunk): void {\n    if (msg.type !== 'WordBoundary' || msg.offset === undefined || msg.duration === undefined || msg.text === undefined) {\n      throw new ValueError(\"Invalid message type, expected 'WordBoundary' with offset, duration and text\");\n    }\n\n    // offset and duration are in 100-nanosecond intervals.\n    // srt timestamps are in seconds. 1s = 10^7 * 100ns\n    const start = msg.offset / 1e7;\n    const end = (msg.offset + msg.duration) / 1e7;\n\n    this.cues.push({\n      index: this.cues.length + 1,\n      start: start,\n      end: end,\n      content: msg.text,\n    });\n  }\n\n  /**\n   * Merges consecutive cues to create subtitle entries with multiple words.\n   * This is useful for creating more readable subtitles instead of word-by-word display.\n   * \n   * @param words - Maximum number of words per merged cue\n   * @throws {ValueError} If words parameter is invalid\n   */\n  mergeCues(words: number): void {\n    if (words <= 0) {\n      throw new ValueError(\"Invalid number of words to merge, expected > 0\");\n    }\n    if (this.cues.length === 0) {\n      return;\n    }\n\n    const newCues: Cue[] = [];\n    let currentCue: Cue = this.cues[0];\n\n    for (const cue of this.cues.slice(1)) {\n      if (currentCue.content.split(' ').length < words) {\n        currentCue = {\n          ...currentCue,\n          end: cue.end,\n          content: `${currentCue.content} ${cue.content}`,\n        };\n      } else {\n        newCues.push(currentCue);\n        currentCue = cue;\n      }\n    }\n    newCues.push(currentCue);\n\n    // re-index\n    this.cues = newCues.map((cue, i) => ({ ...cue, index: i + 1 }));\n  }\n\n  /**\n   * Returns the subtitles in SRT format.\n   * \n   * @returns SRT formatted subtitles\n   */\n  getSrt(): string {\n    return this.cues.map(cue => {\n      return `${cue.index}\\r\\n${formatTime(cue.start)} --> ${formatTime(cue.end)}\\r\\n${cue.content}\\r\\n`;\n    }).join('\\r\\n');\n  }\n\n  toString(): string {\n    return this.getSrt();\n  }\n} "]}