reader/pages/reading/index.js

import {
  getreadInfo
} from '~/api/video'
import {
  createStoreBindings
} from 'mobx-miniprogram-bindings'
import {
  store
} from '~/store/index'
const aiengine = require('~/utils/ChivoxAiEngine')
const sha1 = require('~/utils/sha1');
let rowH = 0
let videoContext = null
let stl = null
let setTimeoutObj = null
/*创建基础引擎*/
let wsEngine = aiengine.createWsEngine({});
/*微信录音*/
let recorderManager = wx.getRecorderManager();
Page({
  data: {
    videoInfo: {},
    currentRow: null,
    state: false,
    countDown: {
      state: false,
      num: 3,
    },
    contentH: 0,
    scrollTop: 0,
    //如果readingReset为true就是重读
    readingReset: false,
    article: [{
      id: 1,
      text: '传说在很久很久以前，',
      time: '0'
    }, {
      id: 2,
      text: '天和地还没有分开，',
      time: '4010'
    }, {
      id: 3,
      text: '整个宇宙混沌一团，',
      time: '7080'
    }, {
      id: 4,
      text: '像个大鸡蛋。',
      time: '10150'
    }, {
      id: 5,
      text: '有个叫盘古的大神，',
      time: '13150'
    }, {
      id: 6,
      text: '昏睡了一万八千年。',
      time: '16190'
    }, {
      id: 7,
      text: '一天，大神醒来，睁眼一看，',
      time: '20030'
    }, {
      id: 8,
      text: '周围黑乎乎一片，',
      time: '24210'
    }, {
      id: 9,
      text: '什么也看不见。',
      time: '27300'
    }]
  },
  onLoad(options) {
    let videoId = options.videoId
    this.getreadInfo(videoId)
    let data = this.data.article
    data = data.map((item, index) => {
      item.readTime = data[index + 1] ? data[index + 1].time - item.time : ''
      return item
    })
    this.setData({
      article: data,
      readingReset: options.reset || false
    })
    // 手工绑定 
    this.storeBindings = createStoreBindings(this, {
      store,
      fields: {
        readDetail: 'readDetail'
      },
      actions: {
        setReadDetail: 'setReadDetail'
      }
    })
    if (!options.reset) {
      var query = wx.createSelectorQuery();
      query.select('.content').boundingClientRect((rect) => {
        this.setData({
          contentH: rect.height
        })
      }).exec()
      query.select('.row').boundingClientRect((rect) => {
        this.rowH = rect.height
      }).exec()
    }
    this.videoContext = wx.createVideoContext('myVideo')
    // 录音授权
    wx.getSetting({
      success(res) {
        if (!res.authSetting['scope.record']) {
          wx.authorize({
            scope: 'scope.record',
            success() {
              // 用户已经同意小程序使用录音功能，后续调用接口不会弹窗询问
              wx.getRecorderManager()
            }
          })
        }
      }
    })
    /*监听评测结果：必须在基础引擎创建后，调用任何评测接口前设置监听，否则有可能收不到相关事件。*/
    wsEngine.onResult((res) => {
      this.getRecordScore(res)
    });
    wsEngine.onErrorResult((res) => {
      console.log("===收到错误结果=============", res)
    });
  },
  async getreadInfo(videoId) {
    let videoInfo = await getreadInfo(videoId)
    wx.setNavigationBarTitle({
      title: videoInfo.userRead.title
    })
    this.setData({
      videoInfo
    })
  },
  // 开始录制
  setCountDown() {
    if (this.data.state) {
      this.finishRecord()
      return
    }
    this.setData({
      'countDown.state': true
    })
    this.stl = setInterval(() => {
      if (this.data.countDown.num == 0) {
        clearInterval(this.stl)
        this.setData({
          state: true,
          countDown: {
            state: false,
            num: 3
          }
        })
        this.soundRecording()
        this.videoContext.play()
        this.startRecording()
      } else {
        this.setData({
          'countDown.num': --this.data.countDown.num
        })
      }
    }, 1000)
  },
  // 录音
  soundRecording() {
    /*调用微信开始录音接口，并启动语音评测*/
    let timeStamp = new Date().getTime()
    let sig = sha1(`16075689600000da${timeStamp}caa8e60da6042731c230fe431ac9c7fd`)
    let app = {
      applicationId: '16075689600000da',
      sig, //签名字符串 
      alg: 'sha1',
      timestamp: timeStamp + '',
      userId: wx.getStorageSync('uid')
    }
    let lessonText = this.data.videoInfo.userRead.lessonText;
    wsEngine.start({
      request: {
        coreType: "cn.pred.raw",
        refText: lessonText,
        rank: 100,
        attachAudioUrl: 1,
        result: {
          details: {
            gop_adjust: 1
          }
        }
      },
      app,
      audio: {
        audioType: "mp3",
        channel: 1,
        sampleBytes: 2,
        sampleRate: 16000
      },
      success: (res) => {
        /*引擎启动成功，可以启动录音机开始录音，并将音频片传给引擎*/
        const options = {
          sampleRate: 44100, //采样率
          numberOfChannels: 1, //录音通道数
          encodeBitRate: 192000, //编码码率
          format: 'mp3', //音频格式，有效值aac/mp3
          frameSize: 50 //指定帧大小，单位 KB
        };
        //开始录音,在开始录音回调中feed音频片
        recorderManager.start(options);
      },
      fail: (res) => {
        console.log("fail=============  " + res);
      },
    });
    //监听录音开始事件
    recorderManager.onStart(() => {});
    //监听录音结束事件
    recorderManager.onStop((res) => {
      console.log('录音结束', res);
      this.setData({
        tempFilePath: res.tempFilePath,
      });
      //录音机结束后，驰声引擎执行结束操作，等待评测返回结果
      wsEngine.stop({
        success: () => {
          console.log('====== wsEngine stop success ======');
        },
        fail: (res) => {
          console.log('录音结束报错', res);
        },
      });
    });
    //监听已录制完指定帧大小的文件事件。如果设置了 frameSize，则会回调此事件。
    recorderManager.onFrameRecorded((res) => {
      const {
        frameBuffer
      } = res
      //TODO 调用feed接口传递音频片给驰声评测引擎
      wsEngine.feed({
        data: frameBuffer, // frameBuffer为微信录音机回调的音频数据
        success: () => {
          console.log('feed success.监听已录制完指定帧大小的文件事件')
        },
        fail: (res) => {
          console.log('监听已录制完指定帧大小报错', res)
        },
      });
    });
  },
  // 结束录制
  finishRecord() {
    recorderManager.stop();
    this.videoContext.stop()
    this.videoContext.seek(0)
    clearTimeout(this.setTimeoutObj)
    clearInterval(this.stl)
    this.setData({
      state: false,
      currentRow: null,
      scrollTop: 0
    })
  },
  // 倒计时
  startRecording() {
    if (this.data.currentRow == null) {
      this.setData({
        currentRow: 0
      })
    }
    let row = this.data.article[this.data.currentRow]
    if (!row.readTime) {
      return
    }
    this.setTimeoutObj = setTimeout(() => {
        this.setData({
          currentRow: ++this.data.currentRow
        })
        this.setData({
          scrollTop: this.rowH * this.data.currentRow
        })
        this.startRecording()
      },
      row.readTime);
  },
  // 视频播放结束
  videoEnd() {
    this.finishRecord()
  },
  // 获取测评结果
  getRecordScore(res) {
    var res = {
      result: {
        rank: 100,
        res: "chn.pred.G4.D4.0.3",
        tone: 50,
        integrity: 12,
        forceout: 0,
        pron: 7,
        overall: 8,
        fluency: {
          pause: 1,
          overall: 0,
          speed: 73
        },
      }
    }
    const result = res.result;
    const integrity = Math.floor(result.integrity); //完成度
    const tone = Math.floor(result.tone); // 语调声调
    const accuracy = Math.floor(result.overall); // 准确度 发音分
    const fluency = Math.floor(result.fluency.overall); //流利度
    let myOverall = Math.floor(integrity * 0.3 + accuracy * 0.5 + fluency * 0.1 + tone * 0.1);
    let detail = {
      integrity,
      tone,
      accuracy,
      fluency,
      myOverall,
      tempFilePath: this.data.tempFilePath,
      title: this.data.videoInfo.userRead.title,
      id: this.data.videoInfo.userRead.exampleId,
    }
    this.setReadDetail(detail)
    wx.redirectTo({
      url: `/pages/score/index`,
    })
  },
  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload() {
    clearTimeout(this.setTimeoutObj)
    clearInterval(this.stl)
  },
  onShareAppMessage() {

  }
})