subject-two/entry/src/main/ets/pages/judgeSDK/utils/voiceAnnouncements.ts

import media from '@ohos.multimedia.media';
import Prompt from '@system.prompt';

const TAG = 'VoiceAnnounce'

export default class VoiceAnnounce{

  //队列时候立马终止
  private isStopped:Boolean
  private queue:String[]
  private newQueue:String[]
  private pendingQueue:String[]
  private callback:Function;
  constructor() {
    this.isStopped = false;
    this.queue = []
  }

  async playAudio(urls:string[],shit?:boolean,callback?:Function){
    const {isStopped,queue} = this;
    this.callback = callback
    if(shit){
      //队列清空，重新初始化
      this.isStopped = true;
      this.newQueue = urls
    }
    if(queue.length){
      //队列续上
      this.queue = this.queue.concat(urls);

    }else{
      this.queue = urls
      await this.executeQueue()
    }
  }

  async executeQueue(){
    const avPlayer = new AVPlayer();
    const go = async () => {
      const {queue,callback,isStopped,newQueue} = this;
      if(isStopped){
        //清空原来队列
        this.queue = newQueue
        this.isStopped = false;
        await go()
        return
      }

      await avPlayer.play(queue[0],callback);
      this.queue.shift();
      console.info(TAG,JSON.stringify(this.queue),'堆栈弹出');
      if(this.queue.length){
        await go()
      }
    }
    await go()
    avPlayer.avPlayerStop();
  }

}


class AVPlayer {

  public avPlayer:any = null;

  private voiceUrl: string[];
  private voiceStatus: 'completed' | 'playing'
  private endCallback:Function
  constructor() {}

  // 以下为使用资源管理接口获取打包在HAP内的媒体资源文件并通过fdSrc属性进行播放示例
  async play(name,callback) {
    this.endCallback = callback
    const avPlayer = await media.createAVPlayer();
    this.avPlayer = avPlayer;
    return new Promise(async (resolve,reject) => {
      let url = ''
      await this.setAVPlayerCallback(()=>{
        //@ts-ignore
        resolve()
      });
      try {
         url =  await globalThis.context.resourceManager.getRawFd(name);
         this.avPlayer.fdSrc = url;
      } catch  (e) {
        Prompt.showToast({
          message: `${name}语音文件不存在`,
          duration: 4000
        });
        resolve(1)
      }
    })
  }
  //音频播放队列
  public releasePlayer() {
    this.avPlayer.release();
  }

  avPlayerStop() {
    this.avPlayer && this.avPlayer.stop()
    this.avPlayer && this.avPlayer.reset()
    this.avPlayer && this.avPlayer.release()
  }
  // 注册avplayer回调函数
  setAVPlayerCallback(callBack) {

    this.avPlayer.on('error', (err) => {
      this.avPlayer && this.avPlayer.stop()
      this.avPlayer && this.avPlayer.reset()
      this.avPlayer && this.avPlayer.release()
    })

    let num = 0;
    // 状态机变化回调函数
    this.avPlayer.on('stateChange', async (state, reason) => {
      const {endCallback} = this;
      switch (state) {
        case 'idle': // 成功调用reset接口后触发该状态机上报
          break;
        case 'initialized': // avplayer 设置播放源后触发该状态上报
          this.avPlayer.prepare()
          break;
        case 'prepared': // prepare调用成功后上报该状态机
          this.avPlayer.play();
          this.voiceStatus = 'playing'
          break;
        case 'playing': // play成功调用后触发该状态机上报
          break;
        case 'paused': // pause成功调用后触发该状态机上报
          break;
        case 'completed': // 播放结束后触发该状态机上报
          this.voiceStatus = 'completed'
          this.avPlayer.stop(); //调用播放结束接口
          if(endCallback){
            endCallback()
          }
          break;
        case 'stopped': // stop接口成功调用后触发该状态机上报
          this.avPlayer.reset(); // 调用reset接口初始化avplayer状态
          callBack()
          break;
        case 'released':
          break;
        default:
          break;
      }
    })
  }
}