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min = Math.min,\r\n  max = Math.max;\r\n\r\nconst setString = function (view: any, offset: any, str: any) {\r\n  const len = str.length;\r\n  for (let i = 0; i < len; ++i) view.setUint8(offset + i, str.charCodeAt(i));\r\n};\r\n\r\nexport class Encoder {\r\n  numSamples = 0;\r\n  numChannels = 1;\r\n  sampleRate = 48000;\r\n  dataViews: DataView[] = [];\r\n  constructor() {}\r\n\r\n  encode(buffer: [Float32Array]) {\r\n    const len = buffer[0].length,\r\n      nCh = this.numChannels,\r\n      view = new DataView(new ArrayBuffer(len * nCh * 2));\r\n    let offset = 0;\r\n    for (let i = 0; i < len; ++i)\r\n      for (let ch = 0; ch < nCh; ++ch) {\r\n        const x = buffer[ch][i] * 0x7fff;\r\n        view.setInt16(offset, x < 0 ? max(x, -0x8000) : min(x, 0x7fff), true);\r\n        offset += 2;\r\n      }\r\n    this.dataViews.push(view);\r\n    this.numSamples += len;\r\n  }\r\n\r\n  finish() {\r\n    const dataSize = this.numChannels * this.numSamples * 2,\r\n      view = new DataView(new ArrayBuffer(44));\r\n    setString(view, 0, \"RIFF\");\r\n    view.setUint32(4, 36 + dataSize, true);\r\n    setString(view, 8, \"WAVE\");\r\n    setString(view, 12, \"fmt \");\r\n    view.setUint32(16, 16, true);\r\n    view.setUint16(20, 1, true);\r\n    view.setUint16(22, this.numChannels, true);\r\n    view.setUint32(24, this.sampleRate, true);\r\n    view.setUint32(28, this.sampleRate * 4, true);\r\n    view.setUint16(32, this.numChannels * 2, true);\r\n    view.setUint16(34, 16, true);\r\n    setString(view, 36, \"data\");\r\n    view.setUint32(40, dataSize, true);\r\n    this.dataViews.unshift(view);\r\n    const blob = new Blob(this.dataViews, { type: \"audio/wav\" });\r\n    this.cleanup();\r\n    return blob;\r\n  }\r\n\r\n  cleanup() {\r\n    this.dataViews = [];\r\n  }\r\n}\r\n","import LocalStorage from \"@/core/utils/LocalStorage\";\r\n\r\ntype DeviceType = \"video\" | \"audio\";\r\nexport interface Device {\r\n  id: string;\r\n  name: string;\r\n}\r\n\r\nexport const selectDevice = (id: string, type: DeviceType = \"audio\") => {\r\n  if (type === \"audio\") LocalStorage.setInputDevice(id);\r\n  else LocalStorage.setVideoInputDevice(id);\r\n};\r\n\r\nexport const getInputDevice = (type: DeviceType = \"audio\") => {\r\n  return type === \"audio\"\r\n    ? LocalStorage.getInputDevice()\r\n    : LocalStorage.getVideoInputDevice();\r\n};\r\n\r\nexport const getDevices = async (\r\n  type: DeviceType = \"audio\",\r\n): Promise<Device[]> => {\r\n  if (!navigator.mediaDevices || !navigator.mediaDevices.enumerateDevices) {\r\n    console.log(\"enumerateDevices() not supported.\");\r\n    return [];\r\n  }\r\n\r\n  const inputDevice = getInputDevice();\r\n  const constraints: MediaStreamConstraints =\r\n    type === \"audio\"\r\n      ? {\r\n          video: false,\r\n          audio: {\r\n            channelCount: 1,\r\n            echoCancellation: false,\r\n            deviceId: inputDevice || undefined,\r\n          },\r\n        }\r\n      : {\r\n          audio: false,\r\n          video: {\r\n            deviceId: inputDevice || undefined,\r\n          },\r\n        };\r\n\r\n  try {\r\n    const stream = await navigator.mediaDevices.getUserMedia(constraints);\r\n    stream.getTracks().forEach(t => t.stop());\r\n  } catch (error) {\r\n    console.warn(\r\n      `Warning: Access to ${\r\n        type === \"audio\" ? \"microphone\" : \"camera\"\r\n      } denied.`,\r\n      error,\r\n    );\r\n  }\r\n\r\n  try {\r\n    const devices = await navigator.mediaDevices.enumerateDevices();\r\n    const deviceType: MediaDeviceKind =\r\n      type === \"audio\" ? \"audioinput\" : \"videoinput\";\r\n\r\n    const inputDevices = devices\r\n      .filter(device => device.kind === deviceType)\r\n      .map(device => ({\r\n        id: device.deviceId,\r\n        name: device.label || `Unknown device (${type})`,\r\n      }));\r\n\r\n    if (!inputDevice && inputDevices.length > 0)\r\n      selectDevice(inputDevices[0].id, type);\r\n\r\n    console.log(`Found devices (${type}):`, inputDevices);\r\n\r\n    return inputDevices;\r\n  } catch (error) {\r\n    console.error(\"Error while listing devices:\", error);\r\n    return [];\r\n  }\r\n};\r\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar arrayBufferModule = require('../internals/array-buffer');\nvar setSpecies = require('../internals/set-species');\n\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar ArrayBuffer = arrayBufferModule[ARRAY_BUFFER];\nvar NativeArrayBuffer = global[ARRAY_BUFFER];\n\n// `ArrayBuffer` constructor\n// https://tc39.github.io/ecma262/#sec-arraybuffer-constructor\n$({ global: true, forced: NativeArrayBuffer !== ArrayBuffer }, {\n  ArrayBuffer: ArrayBuffer\n});\n\nsetSpecies(ARRAY_BUFFER);\n","import { Recording } from \"@/core/models\";\r\nimport { getInputDevice } from \"./devices\";\r\nimport { Encoder } from \"./encoder\";\r\n\r\nexport default class {\r\n  isRecording = false;\r\n  bufferSize = 4096;\r\n  isPause = false;\r\n  duration = 0;\r\n  savedDuration = 0;\r\n\r\n  stream?: MediaStream;\r\n  encoder?: Encoder;\r\n  context?: AudioContext;\r\n  processor?: ScriptProcessorNode;\r\n  input?: MediaStreamAudioSourceNode;\r\n  analyzer?: AnalyserNode;\r\n  onupdate: (vol: number) => void;\r\n\r\n  constructor(onupdate: (vol: number) => void = () => {}) {\r\n    this.onupdate = onupdate;\r\n  }\r\n\r\n  async start() {\r\n    const inputDevice = getInputDevice();\r\n    const constraints: MediaStreamConstraints = {\r\n      video: false,\r\n      audio: {\r\n        channelCount: 1,\r\n        echoCancellation: false,\r\n        deviceId: inputDevice ? { exact: inputDevice } : undefined,\r\n      },\r\n    };\r\n\r\n    try {\r\n      const stream = await navigator.mediaDevices.getUserMedia(constraints);\r\n      this.stream = stream;\r\n      this.encoder = new Encoder();\r\n      this._micCaptured(stream);\r\n    } catch (error) {\r\n      console.log(\"Mic error\", error);\r\n    }\r\n  }\r\n\r\n  async stop() {\r\n    this.stream?.getTracks().forEach((track: MediaStreamTrack) => track.stop());\r\n\r\n    this.input?.disconnect();\r\n    this.processor?.disconnect();\r\n    this.duration = this.context?.currentTime || this.savedDuration;\r\n    this.context?.close();\r\n\r\n    const blob = this.encoder?.finish();\r\n    if (!blob) return;\r\n\r\n    const now = new Date();\r\n    const record = {\r\n      blob: blob,\r\n      recordedAt: now.toISOString(),\r\n      title: `Recorded on ${now.toLocaleString()}`,\r\n    } as Recording;\r\n\r\n    this.savedDuration = 0;\r\n    this.duration = 0;\r\n    this.isRecording = false;\r\n\r\n    return record;\r\n  }\r\n\r\n  pause() {\r\n    this.stream?.getTracks().forEach((track: MediaStreamTrack) => track.stop());\r\n    this.input?.disconnect();\r\n    this.processor?.disconnect();\r\n    this.duration = this.context?.currentTime || this.savedDuration;\r\n    this.context?.close();\r\n\r\n    this.savedDuration = this.duration;\r\n    this.isPause = true;\r\n  }\r\n\r\n  _micCaptured(stream: MediaStream) {\r\n    // @ts-ignore\r\n    this.context = new (window.AudioContext || window.webkitAudioContext)();\r\n    this.duration = this.savedDuration;\r\n    this.analyzer = this.context.createAnalyser();\r\n    this.input = this.context.createMediaStreamSource(stream);\r\n    this.processor = this.context.createScriptProcessor(this.bufferSize, 1, 1);\r\n    this.stream = stream;\r\n\r\n    this.analyzer.fftSize = 64;\r\n    this.analyzer.smoothingTimeConstant = 0.3;\r\n\r\n    this.input.connect(this.analyzer);\r\n    this.analyzer.connect(this.processor);\r\n    this.processor.connect(this.context.destination);\r\n    this.processor.onaudioprocess = (ev: AudioProcessingEvent) => {\r\n      // Toggle if recording\r\n      if (!this.isRecording || (this.isRecording && this.isPause)) {\r\n        this.isPause = false;\r\n        this.isRecording = true;\r\n      }\r\n\r\n      // encode sample\r\n      const sample = ev.inputBuffer.getChannelData(0);\r\n      this.encoder?.encode([sample]);\r\n\r\n      // get duration\r\n      this.duration = this.savedDuration + (this.context?.currentTime || 0);\r\n\r\n      // get volume\r\n      if (!this.analyzer) return;\r\n      const buffer = new Uint8Array(this.analyzer.frequencyBinCount);\r\n      this.analyzer.getByteFrequencyData(buffer);\r\n      const sum = buffer.reduce((cum, curr) => cum + curr, 0);\r\n      const vol = sum / buffer.length;\r\n      this.onupdate(vol);\r\n    };\r\n\r\n    this.input?.connect(this.processor);\r\n    this.processor.connect(this.context.destination);\r\n  }\r\n}\r\n"],"sourceRoot":""}