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CORS policy may prevent\n * direct usage from web apps. Consider using a proxy server.\n */\nexport class EdgeTTSBrowser {\n  public text: string;\n  public voice: string;\n  public rate: string;\n  public volume: string;\n  public pitch: string;\n\n  private ws: WebSocket | null = null;\n  private readonly WSS_URL = \"wss://speech.platform.bing.com/consumer/speech/synthesize/readaloud/edge/v1\";\n  private readonly TRUSTED_CLIENT_TOKEN = \"6A5AA1D4EAFF4E9FB37E23D68491D6F4\";\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.\n   * @returns A promise that resolves with the synthesized audio and subtitle data.\n   */\n  public async synthesize(): Promise<SynthesisResult> {\n    await this.connect();\n\n    if (!this.ws || this.ws.readyState !== WebSocket.OPEN) {\n      throw new Error(\"WebSocket is not connected.\");\n    }\n\n    this.ws.send(this.createSpeechConfig());\n    this.ws.send(this.createSSML());\n\n    return new Promise((resolve, reject) => {\n      const audioChunks: Uint8Array[] = [];\n      let wordBoundaries: WordBoundary[] = [];\n\n      if (this.ws) {\n        this.ws.onmessage = (event: MessageEvent) => {\n          if (typeof event.data === \"string\") {\n            // Text message\n            const { headers, body } = this.parseMessage(event.data);\n            if (headers.Path === \"audio.metadata\") {\n              try {\n                const metadata = JSON.parse(body);\n                if (metadata.Metadata && Array.isArray(metadata.Metadata)) {\n                  const boundaries = metadata.Metadata\n                    .filter((item: any) => item.Type === \"WordBoundary\" && item.Data)\n                    .map((item: any) => ({\n                      offset: item.Data.Offset,\n                      duration: item.Data.Duration,\n                      text: item.Data.text.Text,\n                    }));\n                  wordBoundaries = wordBoundaries.concat(boundaries);\n                }\n              } catch (e) {\n                // Ignore JSON parsing errors for metadata\n              }\n            } else if (headers.Path === \"turn.end\") {\n              if (this.ws) this.ws.close();\n            }\n          } else if (event.data instanceof Blob) {\n            // Binary audio message\n            event.data.arrayBuffer().then(arrayBuffer => {\n              const dataView = new DataView(arrayBuffer);\n              const headerLength = dataView.getUint16(0);\n\n              if (arrayBuffer.byteLength > headerLength + 2) {\n                const audioData = new Uint8Array(arrayBuffer, headerLength + 2);\n                audioChunks.push(audioData);\n              }\n            });\n          }\n        };\n\n        this.ws.onclose = () => {\n          const audioBlob = new Blob(audioChunks, { type: \"audio/mpeg\" });\n          resolve({ audio: audioBlob, subtitle: wordBoundaries });\n        };\n\n        this.ws.onerror = (error) => {\n          reject(error);\n        };\n      }\n    });\n  }\n\n  /**\n   * Establishes a connection to the WebSocket server.\n   */\n  private connect(): Promise<void> {\n    const connectionId = this.generateConnectionId();\n    const secMsGec = this.generateSecMsGec();\n    const url = `${this.WSS_URL}?TrustedClientToken=${this.TRUSTED_CLIENT_TOKEN}&ConnectionId=${connectionId}&Sec-MS-GEC=${secMsGec}&Sec-MS-GEC-Version=1-130.0.2849.68`;\n\n    this.ws = new WebSocket(url);\n\n    return new Promise((resolve, reject) => {\n      if (!this.ws) {\n        return reject(new Error(\"WebSocket not initialized\"));\n      }\n      this.ws.onopen = () => {\n        resolve();\n      };\n      this.ws.onerror = (error) => {\n        reject(error);\n      };\n    });\n  }\n\n  /**\n   * Parses a string message from the WebSocket into headers and a body.\n   */\n  private parseMessage(message: string): { headers: Record<string, string>; body: string } {\n    const parts = message.split(\"\\r\\n\\r\\n\");\n    const headerLines = parts[0].split(\"\\r\\n\");\n    const headers: Record<string, string> = {};\n    headerLines.forEach(line => {\n      const [key, value] = line.split(\":\", 2);\n      if (key && value) {\n        headers[key.trim()] = value.trim();\n      }\n    });\n    return { headers, body: parts[1] || '' };\n  }\n\n  /**\n   * Creates the speech configuration message.\n   */\n  private createSpeechConfig(): string {\n    const config = {\n      context: {\n        synthesis: {\n          audio: {\n            metadataoptions: {\n              sentenceBoundaryEnabled: false,\n              wordBoundaryEnabled: true,\n            },\n            outputFormat: \"audio-24khz-48kbitrate-mono-mp3\",\n          },\n        },\n      },\n    };\n    return `X-Timestamp:${this.getTimestamp()}\\r\\nContent-Type:application/json; charset=utf-8\\r\\nPath:speech.config\\r\\n\\r\\n${JSON.stringify(config)}`;\n  }\n\n  /**\n   * Creates the SSML (Speech Synthesis Markup Language) message.\n   */\n  private createSSML(): string {\n    const ssml = `<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>\n      <voice name='${this.voice}'>\n        <prosody pitch='${this.pitch}' rate='${this.rate}' volume='${this.volume}'>\n          ${this.escapeXml(this.text)}\n        </prosody>\n      </voice>\n    </speak>`;\n    return `X-RequestId:${this.generateConnectionId()}\\r\\nContent-Type:application/ssml+xml\\r\\nX-Timestamp:${this.getTimestamp()}Z\\r\\nPath:ssml\\r\\n\\r\\n${ssml}`;\n  }\n\n  private generateConnectionId(): string {\n    return \"xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx\".replace(/[xy]/g, (c) => {\n      const r = (Math.random() * 16) | 0;\n      const v = c === \"x\" ? r : (r & 0x3) | 0x8;\n      return v.toString(16);\n    });\n  }\n\n  private getTimestamp(): string {\n    return new Date().toISOString().replace(/[:-]|\\.\\d{3}/g, \"\");\n  }\n\n  private escapeXml(text: string): string {\n    return text.replace(/[<>&'\"]/g, (char) => {\n      switch (char) {\n        case \"<\": return \"&lt;\";\n        case \">\": return \"&gt;\";\n        case \"&\": return \"&amp;\";\n        case \"'\": return \"&apos;\";\n        case '\"': return \"&quot;\";\n        default: return char;\n      }\n    });\n  }\n\n  /**\n   * Browser-compatible version of DRM security token generation\n   * Uses Web Crypto API instead of Node.js crypto\n   */\n  private async generateSecMsGec(): Promise<string> {\n    const WIN_EPOCH = 11644473600;\n    const S_TO_NS = 1e9;\n\n    let ticks = Date.now() / 1000;\n    ticks += WIN_EPOCH;\n    ticks -= ticks % 300;\n    ticks *= S_TO_NS / 100;\n\n    const strToHash = `${ticks.toFixed(0)}${this.TRUSTED_CLIENT_TOKEN}`;\n\n    // Use Web Crypto API for hashing\n    const encoder = new TextEncoder();\n    const data = encoder.encode(strToHash);\n    const hashBuffer = await 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// ==================================================================================\n// Subtitle Generation Utilities (Browser Compatible)\n// ==================================================================================\n\n/**\n * Formats a time value from 100-nanosecond units into a VTT or SRT timestamp string.\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}${padNumber(milliseconds, 3)}`;\n}\n\n/**\n * Pads a number with leading zeros to a specified length.\n */\nfunction padNumber(num: number, length = 2): string {\n  return num.toString().padStart(length, '0');\n}\n\n/**\n * Creates a subtitle file content in VTT (WebVTT) format.\n */\nexport function createVTT(wordBoundaries: WordBoundary[]): string {\n  let vttContent = \"WEBVTT\\n\\n\";\n  wordBoundaries.forEach((word, index) => {\n    const startTime = formatTimestamp(word.offset, 'vtt');\n    const endTime = formatTimestamp(word.offset + word.duration, 'vtt');\n    vttContent += `${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 */\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 * Browser-specific utility functions that avoid Node.js dependencies.\n * Provides browser-native implementations of UUID generation and XML escaping.\n */\n\n/**\n * Generates a UUID v4 string without hyphens using browser's crypto API.\n * @returns UUID string with hyphens removed\n */\nexport function browserConnectId(): string {\n  // Use crypto.getRandomValues for browser-native UUID generation\n  const array = new Uint8Array(16);\n  crypto.getRandomValues(array);\n\n  // Set version (4) and variant bits according to RFC 4122\n  array[6] = (array[6] & 0x0f) | 0x40;\n  array[8] = (array[8] & 0x3f) | 0x80;\n\n  // Convert to hex string and format as UUID, then remove hyphens\n  const hex = Array.from(array, byte => byte.toString(16).padStart(2, '0')).join('');\n  const uuid = `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20, 32)}`;\n\n  return uuid.replace(/-/g, '');\n}\n\n/**\n * Browser-native XML escaping function.\n * @param text - Text to escape\n * @returns XML-escaped text\n */\nexport function browserEscape(text: string): string {\n  return text\n    .replace(/&/g, '&amp;')\n    .replace(/</g, '&lt;')\n    .replace(/>/g, '&gt;')\n    .replace(/\"/g, '&quot;')\n    .replace(/'/g, '&apos;');\n}\n\n/**\n * Unescapes XML entities in text.\n * @param text - Text containing XML entities to unescape\n * @returns Text with XML entities converted back to their original characters\n */\nexport function browserUnescape(text: string): string {\n  return text\n    .replace(/&quot;/g, '\"')\n    .replace(/&apos;/g, \"'\")\n    .replace(/&lt;/g, '<')\n    .replace(/&gt;/g, '>')\n    .replace(/&amp;/g, '&'); // Do &amp; last to avoid double unescaping\n}\n\n/**\n * Removes control characters that are incompatible with TTS processing.\n * @param text - Input text to clean\n * @returns Text with control characters replaced by spaces\n */\nexport function browserRemoveIncompatibleCharacters(text: string): string {\n  // Remove control characters (U+0000 to U+001F except \\t, \\n, \\r)\n  // eslint-disable-next-line no-control-regex\n  return text.replace(/[\\u0000-\\u0008\\u000B\\u000C\\u000E-\\u001F]/g, ' ');\n}\n\n/**\n * Formats the current date as a string in the format expected by the TTS service.\n * @returns Formatted date string\n */\nexport function browserDateToString(): string {\n  return new Date().toUTCString().replace(\"GMT\", \"GMT+0000 (Coordinated Universal Time)\");\n}\n\n/**\n * Creates SSML (Speech Synthesis Markup Language) from text and voice configuration.\n * @param voice - Voice name\n * @param rate - Speech rate (e.g., \"+0%\")\n * @param volume - Speech volume (e.g., \"+0%\") \n * @param pitch - Speech pitch (e.g., \"+0Hz\")\n * @param escapedText - Text content (should be XML-escaped)\n * @returns Complete SSML document string\n */\nexport function browserMkssml(voice: string, rate: string, volume: string, pitch: string, escapedText: string): string {\n  return (\n    \"<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xml:lang='en-US'>\"\n    + `<voice name='${voice}'>`\n    + `<prosody pitch='${pitch}' rate='${rate}' volume='${volume}'>`\n    + `${escapedText}`\n    + \"</prosody>\"\n    + \"</voice>\"\n    + \"</speak>\"\n  );\n}\n\n/**\n * Creates a complete WebSocket message with headers and SSML data.\n * @param requestId - Unique request identifier\n * @param timestamp - Timestamp string for the request\n * @param ssml - SSML content to include in the message\n * @returns Complete WebSocket message string with headers and data\n */\nexport function browserSsmlHeadersPlusData(requestId: string, timestamp: string, ssml: string): string {\n  return (\n    `X-RequestId:${requestId}\\r\\n`\n    + \"Content-Type:application/ssml+xml\\r\\n\"\n    + `X-Timestamp:${timestamp}Z\\r\\n`  // This is not a mistake, Microsoft Edge bug.\n    + \"Path:ssml\\r\\n\\r\\n\"\n    + `${ssml}`\n  );\n}\n\n/**\n * Calculates the maximum message size for text chunks based on WebSocket limits.\n * @param voice - Voice name\n * @param rate - Speech rate\n * @param volume - Speech volume\n * @param pitch - Speech pitch\n * @returns Maximum byte size for text content in a single message\n */\nexport function browserCalcMaxMesgSize(voice: string, rate: string, volume: string, pitch: string): number {\n  const websocketMaxSize = 2 ** 16;\n  const overheadPerMessage = browserSsmlHeadersPlusData(\n    browserConnectId(),\n    browserDateToString(),\n    browserMkssml(voice, rate, volume, pitch, \"\"),\n  ).length + 50; // margin of error\n  return websocketMaxSize - overheadPerMessage;\n} ","/**\n * Base exception class for all Edge TTS related errors.\n */\nexport class EdgeTTSException extends Error {\n  constructor(message: string) {\n    super(message);\n    this.name = \"EdgeTTSException\";\n  }\n}\n\n/**\n * Exception raised when there's an error adjusting clock skew for API requests.\n * This typically occurs when 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 = \"130.0.2849.68\";\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/${CHROMIUM_MAJOR_VERSION}.0.0.0`,\n  \"Accept-Encoding\": \"gzip, deflate, br\",\n  \"Accept-Language\": \"en-US,en;q=0.9\",\n};\n\n/** HTTP headers specific to WebSocket connection requests */\nexport const WSS_HEADERS = {\n  ...BASE_HEADERS,\n  \"Pragma\": \"no-cache\",\n  \"Cache-Control\": \"no-cache\",\n  \"Origin\": \"chrome-extension://jdiccldimpdaibmpdkjnbmckianbfold\",\n};\n\n/** HTTP headers specific to voice list API requests */\nexport const VOICE_HEADERS = {\n  ...BASE_HEADERS,\n  \"Authority\": \"speech.platform.bing.com\",\n  \"Sec-CH-UA\": `\" Not;A Brand\";v=\"99\", \"Microsoft Edge\";v=\"${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 * Browser-specific DRM class that uses only Web APIs.\n * Uses the Web Crypto API instead of Node.js crypto module.\n */\nexport class BrowserDRM {\n  private static clockSkewSeconds = 0.0;\n\n  static adjClockSkewSeconds(skewSeconds: number) {\n    BrowserDRM.clockSkewSeconds += skewSeconds;\n  }\n\n  static getUnixTimestamp(): number {\n    return Date.now() / 1000 + BrowserDRM.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: Record<string, string> }) {\n    if (!response.headers) {\n      throw new SkewAdjustmentError(\"No headers in response.\");\n    }\n    const serverDate = response.headers[\"date\"] || response.headers[\"Date\"];\n    if (!serverDate) {\n      throw new SkewAdjustmentError(\"No server date in headers.\");\n    }\n    const serverDateParsed = BrowserDRM.parseRfc2616Date(serverDate);\n    if (serverDateParsed === null) {\n      throw new SkewAdjustmentError(`Failed to parse server date: ${serverDate}`);\n    }\n    const clientDate = BrowserDRM.getUnixTimestamp();\n    BrowserDRM.adjClockSkewSeconds(serverDateParsed - clientDate);\n  }\n\n  static async generateSecMsGec(): Promise<string> {\n    let ticks = BrowserDRM.getUnixTimestamp();\n    ticks += WIN_EPOCH;\n    ticks -= ticks % 300;\n    ticks *= S_TO_NS / 100;\n\n    const strToHash = `${ticks.toFixed(0)}${TRUSTED_CLIENT_TOKEN}`;\n\n    // Use Web Crypto API - guaranteed to be available in browsers\n    const encoder = new TextEncoder();\n    const data = encoder.encode(strToHash);\n    const hashBuffer = await 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} ","import {\n  browserConnectId,\n  browserEscape,\n  browserUnescape,\n  browserSsmlHeadersPlusData,\n  browserDateToString,\n  browserMkssml,\n  browserRemoveIncompatibleCharacters,\n  browserCalcMaxMesgSize\n} from './browser-utils';\nimport {\n  NoAudioReceived,\n  UnexpectedResponse,\n  UnknownResponse,\n  WebSocketError\n} from \"./exceptions\";\nimport { TTSConfig } from './tts_config';\nimport { CommunicateState, TTSChunk } from './types';\nimport { DEFAULT_VOICE, WSS_URL, WSS_HEADERS, SEC_MS_GEC_VERSION } from './constants';\nimport { BrowserDRM } from './browser-drm';\n\n// Browser-specific types (avoiding Node.js Buffer dependency)\nexport type BrowserTTSChunk = {\n  type: \"audio\" | \"WordBoundary\";\n  data?: Uint8Array;\n  duration?: number;\n  offset?: number;\n  text?: string;\n};\n\nexport type BrowserCommunicateState = {\n  partialText: Uint8Array;\n  offsetCompensation: number;\n  lastDurationOffset: number;\n  streamWasCalled: boolean;\n};\n\n// Browser-compatible Buffer utilities\nclass BrowserBuffer {\n  static 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 BrowserBuffer.from');\n  }\n\n  static 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\n// Browser-compatible versions of utility functions\nfunction browserGetHeadersAndDataFromText(message: Uint8Array): [{ [key: string]: string }, Uint8Array] {\n  const messageString = new TextDecoder().decode(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 browserGetHeadersAndDataFromBinary(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\nfunction browserSplitTextByByteLength(text: string, byteLength: number): Generator<Uint8Array> {\n  return (function* () {\n    let buffer = new TextEncoder().encode(text);\n\n    if (byteLength <= 0) {\n      throw new Error(\"byteLength must be greater than 0\");\n    }\n\n    while (buffer.length > byteLength) {\n      let splitAt = byteLength;\n\n      // Try to find a good split point (space or newline)\n      const slice = buffer.slice(0, byteLength);\n      const sliceText = new TextDecoder().decode(slice);\n      const lastNewline = sliceText.lastIndexOf('\\n');\n      const lastSpace = sliceText.lastIndexOf(' ');\n\n      if (lastNewline > 0) {\n        splitAt = new TextEncoder().encode(sliceText.substring(0, lastNewline)).length;\n      } else if (lastSpace > 0) {\n        splitAt = new TextEncoder().encode(sliceText.substring(0, lastSpace)).length;\n      }\n\n      const chunk = buffer.slice(0, splitAt);\n      const chunkText = new TextDecoder().decode(chunk).trim();\n      if (chunkText) {\n        yield new TextEncoder().encode(chunkText);\n      }\n\n      buffer = buffer.slice(splitAt);\n    }\n\n    const remainingText = new TextDecoder().decode(buffer).trim();\n    if (remainingText) {\n      yield new TextEncoder().encode(remainingText);\n    }\n  })();\n}\n\n/**\n * Configuration options for the browser Communicate class.\n */\nexport interface BrowserCommunicateOptions {\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  /** WebSocket connection timeout in milliseconds */\n  connectionTimeout?: number;\n}\n\n/**\n * Browser-specific Communicate class that uses only browser-native APIs.\n * Uses native WebSocket and Web Crypto API, avoiding any Node.js dependencies.\n * \n * @example\n * ```typescript\n * const communicate = new BrowserCommunicate('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 BrowserCommunicate {\n  private readonly ttsConfig: TTSConfig;\n  private readonly texts: Generator<Uint8Array>;\n  private readonly connectionTimeout?: number;\n\n  private state: BrowserCommunicateState = {\n    partialText: BrowserBuffer.from(''),\n    offsetCompensation: 0,\n    lastDurationOffset: 0,\n    streamWasCalled: false,\n  };\n\n  /**\n   * Creates a new browser 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: BrowserCommunicateOptions = {}) {\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    this.texts = browserSplitTextByByteLength(\n      browserEscape(browserRemoveIncompatibleCharacters(text)),\n      browserCalcMaxMesgSize(this.ttsConfig.voice, this.ttsConfig.rate, this.ttsConfig.volume, this.ttsConfig.pitch),\n    );\n\n    this.connectionTimeout = options.connectionTimeout;\n  }\n\n  private parseMetadata(data: Uint8Array): BrowserTTSChunk {\n    const metadata = JSON.parse(new TextDecoder().decode(data));\n    for (const metaObj of metadata['Metadata']) {\n      const metaType = metaObj['Type'];\n      if (metaType === 'WordBoundary') {\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: browserUnescape(metaObj['Data']['text']['Text']),\n        };\n      }\n      if (metaType === 'SessionEnd') {\n        continue;\n      }\n      throw new UnknownResponse(`Unknown metadata type: ${metaType}`);\n    }\n    throw new UnexpectedResponse('No WordBoundary metadata found');\n  }\n\n  private async * _stream(): AsyncGenerator<BrowserTTSChunk, void, unknown> {\n    const url = `${WSS_URL}&Sec-MS-GEC=${await BrowserDRM.generateSecMsGec()}&Sec-MS-GEC-Version=${SEC_MS_GEC_VERSION}&ConnectionId=${browserConnectId()}`;\n\n    const websocket = new WebSocket(url);\n    const messageQueue: (BrowserTTSChunk | Error | 'close')[] = [];\n    let resolveMessage: (() => void) | null = null;\n\n    // Set connection timeout if specified\n    let timeoutId: number | undefined;\n    if (this.connectionTimeout) {\n      timeoutId = window.setTimeout(() => {\n        websocket.close();\n        messageQueue.push(new WebSocketError('Connection timeout'));\n        if (resolveMessage) resolveMessage();\n      }, this.connectionTimeout);\n    }\n\n    websocket.onmessage = (event: MessageEvent) => {\n      // Clear timeout on first message\n      if (timeoutId) {\n        window.clearTimeout(timeoutId);\n        timeoutId = undefined;\n      }\n\n      const data = event.data;\n      const isBinary = data instanceof ArrayBuffer || data instanceof Blob;\n\n      if (typeof data === 'string') {\n        // Text message\n        const [headers, parsedData] = browserGetHeadersAndDataFromText(BrowserBuffer.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          websocket.close();\n        } else if (path !== 'response' && path !== 'turn.start') {\n          messageQueue.push(new UnknownResponse(`Unknown path received: ${path}`));\n        }\n      } else if (data instanceof ArrayBuffer) {\n        // Binary message\n        const bufferData = BrowserBuffer.from(data);\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] = browserGetHeadersAndDataFromBinary(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      } else if (data instanceof Blob) {\n        // Handle Blob data (convert to ArrayBuffer first)\n        data.arrayBuffer().then(arrayBuffer => {\n          const bufferData = BrowserBuffer.from(arrayBuffer);\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] = browserGetHeadersAndDataFromBinary(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          if (resolveMessage) resolveMessage();\n        });\n      }\n\n      if (resolveMessage) resolveMessage();\n    };\n\n    websocket.onerror = (error: Event) => {\n      if (timeoutId) {\n        window.clearTimeout(timeoutId);\n        timeoutId = undefined;\n      }\n      messageQueue.push(new WebSocketError('WebSocket error occurred'));\n      if (resolveMessage) resolveMessage();\n    };\n\n    websocket.onclose = () => {\n      if (timeoutId) {\n        window.clearTimeout(timeoutId);\n        timeoutId = undefined;\n      }\n      messageQueue.push('close');\n      if (resolveMessage) resolveMessage();\n    };\n\n    await new Promise<void>((resolve, reject) => {\n      websocket.onopen = () => {\n        if (timeoutId) {\n          window.clearTimeout(timeoutId);\n          timeoutId = undefined;\n        }\n        resolve();\n      };\n\n      // Set up a timeout for connection establishment\n      if (this.connectionTimeout) {\n        setTimeout(() => {\n          if (websocket.readyState === WebSocket.CONNECTING) {\n            websocket.close();\n            reject(new WebSocketError('Connection timeout'));\n          }\n        }, this.connectionTimeout);\n      }\n    });\n\n    websocket.send(\n      `X-Timestamp:${browserDateToString()}\\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    websocket.send(\n      browserSsmlHeadersPlusData(\n        browserConnectId(),\n        browserDateToString(),\n        browserMkssml(this.ttsConfig.voice, this.ttsConfig.rate, this.ttsConfig.volume, this.ttsConfig.pitch, new TextDecoder().decode(this.state.partialText)),\n      )\n    );\n\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 native browser WebSocket.\n   * Uses only browser-native APIs, avoiding Node.js dependencies.\n   * \n   * @yields BrowserTTSChunk - 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<BrowserTTSChunk, 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} ","import { BrowserCommunicate, BrowserTTSChunk } from './browser-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 * Browser-specific Edge TTS class that uses only browser-native APIs.\n * Avoids any Node.js dependencies that could cause issues in browser environments.\n */\nexport class BrowserEdgeTTS {\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 browser-native APIs.\n   * @returns A promise that resolves with the synthesized audio and subtitle data.\n   */\n  public async synthesize(): Promise<SynthesisResult> {\n    const communicate = new BrowserCommunicate(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\n    const audioBuffer = concatUint8Arrays(audioChunks);\n    const audioBlob = new Blob([audioBuffer], { type: \"audio/mpeg\" });\n\n    return {\n      audio: audioBlob,\n      subtitle: wordBoundaries,\n    };\n  }\n}\n\n// ==================================================================================\n// Subtitle Generation Utilities (Browser Compatible)\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} ","import { SEC_MS_GEC_VERSION, VOICE_HEADERS, VOICE_LIST_URL } from './constants';\nimport { BrowserDRM } from './browser-drm';\nimport { Voice, VoicesManagerFind, VoicesManagerVoice } from './types';\n\n/**\n * Error class for fetch-related errors (browser-specific)\n */\nexport class BrowserFetchError 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 = 'BrowserFetchError';\n    this.response = response;\n  }\n}\n\nasync function _listVoices(): Promise<Voice[]> {\n  const url = `${VOICE_LIST_URL}&Sec-MS-GEC=${await BrowserDRM.generateSecMsGec()}&Sec-MS-GEC-Version=${SEC_MS_GEC_VERSION}`;\n\n  try {\n    const response = await fetch(url, {\n      headers: VOICE_HEADERS,\n    });\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 BrowserFetchError(`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 BrowserFetchError) {\n      throw error;\n    }\n    // Convert other fetch errors to our BrowserFetchError format\n    throw new BrowserFetchError(error instanceof Error ? error.message : 'Unknown fetch error');\n  }\n}\n\n/**\n * Fetches all available voices from the Microsoft Edge TTS service (browser version).\n * Uses native browser fetch API and Web Crypto.\n * \n * @returns Promise resolving to array of available voices\n */\nexport async function listVoices(): Promise<Voice[]> {\n  try {\n    return await _listVoices();\n  } catch (e) {\n    if (e instanceof BrowserFetchError && e.response?.status === 403) {\n      BrowserDRM.handleClientResponseError(e.response);\n      return await _listVoices();\n    }\n    throw e;\n  }\n}\n\n/**\n * Browser-specific utility class for finding and filtering available voices.\n * Uses only browser-native APIs.\n * \n * @example\n * ```typescript\n * const voicesManager = await BrowserVoicesManager.create();\n * const englishVoices = voicesManager.find({ Language: 'en' });\n * ```\n */\nexport class BrowserVoicesManager {\n  private voices: VoicesManagerVoice[] = [];\n  private calledCreate = false;\n\n  /**\n   * Creates a new BrowserVoicesManager instance.\n   * \n   * @param customVoices - Optional custom voice list instead of fetching from API\n   * @returns Promise resolving to BrowserVoicesManager instance\n   */\n  public static async create(customVoices?: Voice[]): Promise<BrowserVoicesManager> {\n    const manager = new BrowserVoicesManager();\n    const voices = customVoices ?? await listVoices();\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('BrowserVoicesManager.find() called before BrowserVoicesManager.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 { 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} "]}