answer-and-talk.js

import RingCentral from '@rc-ex/core'
import { nonstandard } from 'wrtc'
import mediaDevices from 'node-webrtc-media-devices'
import Speaker from 'speaker'

import Softphone from '../../src/index'

const rc = new RingCentral({
  server: process.env.RINGCENTRAL_SERVER_URL,
  clientId: process.env.RINGCENTRAL_CLIENT_ID,
  clientSecret: process.env.RINGCENTRAL_CLIENT_SECRET
})

;(async () => {
  await rc.authorize({
    username: process.env.RINGCENTRAL_USERNAME,
    extension: process.env.RINGCENTRAL_EXTENSION,
    password: process.env.RINGCENTRAL_PASSWORD
  })
  const softphone = new Softphone(rc)
  await softphone.register()
  await rc.revoke() // rc is no longer needed
  softphone.on('INVITE', async sipMessage => {
    const inputAudioStream = await mediaDevices.getUserMedia({ audio: true, video: false })
    softphone.answer(sipMessage, inputAudioStream)
    softphone.once('track', e => {
      const speaker = new Speaker({ channels: 1, bitDepth: 16, sampleRate: 48000, signed: true })
      const audioSink = new nonstandard.RTCAudioSink(e.track)
      audioSink.ondata = data => {
        speaker.write(Buffer.from(data.samples.buffer))
      }
      softphone.once('BYE', () => {
        audioSink.stop()
        speaker.close()
      })
    })
  })
})()