微信小程序通过websocket实时语音识别的实现代码

 const recorderManager = wx.getRecorderManager()
 const recorderConfig = { 
  duration: 600000, 
  frameSize: 5, //指定当录音大小达到5KB时触发onFrameRecorded
  format: 'PCM', 
  //文档中没写这个参数也可以触发onFrameRecorded的回调，不过楼主亲测可以使用
  sampleRate: 16000, 
  encodeBitRate: 96000, 
  numberOfChannels: 1 
 }

 linkSocket() {
  let _this = this
  //这里的sn是百度实时语音用于排查日志，这里我图方便就用时间戳了
  let sn = new Date().getTime()
  wx.showLoading({
   title: '识别中...'
  })
  recorderManager.start(recorderConfig)
  //开启链接
  wx.connectSocket({
   url: 'wss://vop.baidu.com/realtime_asr?sn=' + sn,
   protocols: ['websocket'],
   success() {
    console.log('连接成功')
    _this.initEventHandle()
   }
  })
 },

 //监听websocket返回的数据
 initEventHandle() {
  let _this = this
  wx.onSocketMessage((res) => {
   let result = JSON.parse(res.data.replace('\n',''))
   if(result.type == 'MID_TEXT'){
    _this.tran(result.result, 'value')
    _this.setData({
     textDis: 'none',
     value: result.result,
    })
   }
   if(result.type == 'FIN_TEXT'){
    let value = _this.data.text
    let tranStr = value + result.result
    _this.tran(tranStr, 'text')
    _this.setData({
     value: '',
     valueEn: '',
     textDis: 'block',
     text: tranStr,
    })
   }
  })
  wx.onSocketOpen(() => 
   //发送数据帧
   _this.wsStart()
   console.log('WebSocket连接打开')
  })
  wx.onSocketError(function (res) {
   console.log('WebSocket连接打开失败')
  })
  wx.onSocketClose(function (res) {
   console.log('WebSocket 已关闭！')
  })
 },

 wsStart() {
  let config = {
   type: "START",
   data: {
    appid: XXXXXXXXX,//百度实时语音识别appid
    appkey: "XXXXXXXXXXXXXXXXXX",//百度实时语音识别key
    dev_pid: 15372,
    cuid: "cuid-1",
    format: "pcm",
    sample: 16000
   }
  }
  wx.sendSocketMessage({
   data:JSON.stringify(config),
   success(res){
    console.log('发送开始帧成功')
   }
  })
 },

 wsSend(data){
  wx.sendSocketMessage({
   data:data,
   success(res){
    console.log('发送数据帧成功')
   }
  })
 },

 wsStop(){
  let _this = this
  this.setData({
   click: true,
  })
  _this.stop()
  let config = {
   type: "FINISH"
  }
  wx.hideLoading()
  recorderManager.stop()
  wx.sendSocketMessage({
   data:JSON.stringify(config),
   success(res){
    console.log('发送结束帧成功')
   }
  })
 },

 onShow: function () {
  let _this = this
  recorderManager.onFrameRecorded(function (res){
   let data = res.frameBuffer
   _this.wsSend(data)
  })

  recorderManager.onInterruptionBegin(function (res){
   console.log('录音中断')
   _this.wsStopForAcc()
  })

  recorderManager.onStop(function (res){
   console.log('录音停止')
  })
 },