Feawel

{
  imageUrl: "http://iamge.com/image.jpg",
  structure: [
  {
    x_sup: 103.3,
    y_sup: 19,
    x_inf: 119,
    y_inf: 38
  },
  {

Feawel

const someReallyUsefullFunction = async (text) => {
    // Break in parts small enough to be handle by Polly API
    const parts = divideTextEnoughToBeHandleByPolly(text)
    
    // Concat AudioStreams in one Buffer
    const audioStreams = audios.map(a => a.AudioStream)
    const buffer = Buffer.concat(audioStreams, audioStreams.reduce((len, a) => len + a.length, 0))
    
    ...
}

Feawel

const someReallyUsefullFunction = (text) => {
  
  ...
  
  // Break in parts small enough to be handle by Polly API
  const parts = divideTextEnoughToBeHandleByPolly(text)
  
  ...
  
}

Feawel

const writeAudioStreamToS3 = ( audioStream, filename ) =>
  putObject(aws_publicBucket, filename, audioStream,'audio/mp3').then( res => {
    if(!res.ETag) throw res
    else return {
      msg: 'File successfully generated.',
      ETag: res.ETag,
      url: `https://s3-eu-west-1.amazonaws.com/${aws_publicBucket}/${filename}`
    }
  })

Feawel

// Generate audio from Polly and check if output is a Buffer
const generatePollyAudio = (text, voiceId) => {
  const params = {
    Text: text,
    OutputFormat: 'mp3',
    VoiceId: voiceId // see Polly API for the list http://docs.aws.amazon.com/fr_fr/polly/latest/dg/API_Voice.html#API_Voice_Contents
  }

  return polly.synthesizeSpeech(params).promise().then( audio => {
    if (audio.AudioStream instanceof Buffer) return audio

Feawel

import aws from 'aws-sdk'

// Create a Polly client
const polly = new aws.Polly({
 signatureVersion: ‘v4’,
 region: ‘eu-west-1’
})

Feawel

/**
 * Use as proxy between front and AWS Polly API
 * Everything come in querystring
 * voiceId : see Polly API for the list http://docs.aws.amazon.com/fr_fr/polly/latest/dg/API_Voice.html#API_Voice_Contents
 * type :
 *   - file (default) : generate mp3 file on public bucket
 *   - stream : stream response
 */
export const textToSpeech = async (req, res) => {