// 全局声明 audio
let audio = null;

// 实时获取后台返回的 音频流（MP3流）并进行播放
function ttsPlay(params) {
  return new Promise((resolve, reject) => {
    axios({
      method: 'post',
      url: 'https://tsn.baidu.com/text2audio?lan=zh&per=4121&cuid=baidu_speech_demo&idx=1&cod=2&lan=zh&ctp=1&pdt=220&aue=3&pit=5&ie=UTF-8&spd=4&tex=' + params,
      responseType: 'arraybuffer'
    }).then((response) => {
      // 将 blob 数据转换成 url
      let mp3Url = window.URL.createObjectURL(new Blob([response.data]))

      // 进行音频播放
      try {
        var playCount = 10;
        //是否已经声明过
        if (audio == null) {
          audio = new Audio();
          audio.addEventListener('ended', function() {
            // alert(playCount)
            playCount = playCount - 1;
            if(playCount <= 0)
              localStorage.setItem('audioEnded', true);
            else{
              setTimeout("audio.play()",1000)
              
            }
          }, false);
        }
        if (mp3Url) {
          audio.src = mp3Url;
          // audio.multer = true;
          audio.play();
        }
      } catch (e) {}
    }).catch((error) => {
      reject(error);
    })
  })
}