#HarmonyOS NEXT 体验官#输入文字转化语音 原创

mport { textToSpeech } from '@kit.CoreSpeechKit';
import { BusinessError } from '@kit.BasicServicesKit';
let ttsEngine: textToSpeech.TextToSpeechEngine;

@Entry
@Component
struct Index05 {
  @State isPlay: boolean = false //是否播放
  @State voiceInfo: string = ""; //接收目前支持的语种音色等信息
  @State inputValue: string = ""; //输入值
  @State inputValueIdx: number = 0; //
  aboutToAppear() {
    this.createByCallback()
  }

  aboutToDisappear(): void {
    ttsEngine.shutdown()
  }

  // 创建引擎，通过callback形式返回
  // 当引擎不存在、引擎资源不存在、初始化超时，返回错误码1003400005，引擎创建失败
  private createByCallback() {
    // 设置创建引擎参数
    let extraParam: Record<string, Object> = {"style": 'interaction-broadcast', "locate": 'CN', "name": 'EngineName'};
    let initParamsInfo: textToSpeech.CreateEngineParams = {
      language: 'zh-CN',
      person: 0,
      online: 1,
      extraParams: extraParam
    };

    // 调用createEngine方法
    textToSpeech.createEngine(initParamsInfo, (err: BusinessError, textToSpeechEngine: textToSpeech.TextToSpeechEngine) => {
      if (!err) {
        console.info('Succeeded in creating engine.');
        // 接收创建引擎的实例
        ttsEngine = textToSpeechEngine;
      } else {
        // 创建引擎失败时返回错误码1003400005，可能原因：引擎不存在、资源不存在、创建引擎超时
        console.error(`Failed to create engine. Code: ${err.code}, message: ${err.message}.`);
      }
    });

  };

  // 调用speak播报方法
  // 未初始化引擎时调用speak方法，返回错误码1003400007，合成及播报失败
  private speak(textValue:string,req_ID:string) {
    let speakListener: textToSpeech.SpeakListener = {
      // 开始播报回调
      onStart(requestId: string, response: textToSpeech.StartResponse) {
        console.info(`onStart, requestId: ${requestId} response: ${JSON.stringify(response)}`);
      },
      // 完成播报回调
      onComplete(requestId: string, response: textToSpeech.CompleteResponse) {
        console.info(`onComplete, requestId: ${requestId} response: ${JSON.stringify(response)}`);
      },
      // 停止播报完成回调，调用stop方法并完成时会触发此回调
      onStop(requestId: string, response: textToSpeech.StopResponse) {
        console.info(`onStop, requestId: ${requestId} response: ${JSON.stringify(response)}`);
      },
      // 返回音频流
      onData(requestId: string, audio: ArrayBuffer, response: textToSpeech.SynthesisResponse) {
        console.info(`onData, requestId: ${requestId} sequence: ${JSON.stringify(response)} audio: ${JSON.stringify(audio)}`);
      },
      // 错误回调，播报过程发生错误时触发此回调
      onError(requestId: string, errorCode: number, errorMessage: string) {
        console.error(`onError, requestId: ${requestId} errorCode: ${errorCode} errorMessage: ${errorMessage}`);
      }
    };
    // 设置回调
    ttsEngine.setListener(speakListener);
    // 设置播报相关参数
    let extraParam: Record<string, Object> = {"queueMode": 0, "speed": 1, "volume": 2, "pitch": 1, "languageContext": 'zh-CN', "audioType": "pcm", "soundChannel": 3, "playType":1}
    let speakParams: textToSpeech.SpeakParams = {
      requestId: req_ID, // requestId在同一实例内仅能用一次，请勿重复设置
      extraParams: extraParam
    };
    // 调用speak播报方法
    ttsEngine.speak(textValue, speakParams);
  };

  // 查询语种音色信息，以callback形式返回
  private listVoicesCallback(req_ID:string) {
    // 设置查询相关参数
    let voicesQuery: textToSpeech.VoiceQuery = {
      requestId: req_ID, // requestId在同一实例内仅能用一次，请勿重复设置
      online: 1
    };

    // 调用listVoices方法，以callback返回语种音色查询结果
    ttsEngine.listVoices(voicesQuery, (err: BusinessError, voiceInfo: textToSpeech.VoiceInfo[]) => {
      if (!err) {
        // 接收目前支持的语种音色等信息
        this.voiceInfo = JSON.stringify(voiceInfo);
        console.info(`Succeeded in listing voices, voiceInfo is ${voiceInfo}`);
      } else {
        console.error(`Failed to list voices. Code: ${err.code}, message: ${err.message}`);
      }
    });
  };

  build() {
    Column(){
      TextArea({placeholder:'请输入...'})
        .width('80%')
        .onChange((value:string)=>{
          this.inputValue = value
        })
        .margin({bottom:20})
        .backgroundColor(0XFFFFFF)

      Column(){
        Image($r('app.media.idiom_yuyin')).width(44).height(44)
          .onClick(()=>{
            this.isPlay = !this.isPlay
            if (this.isPlay == true){
              let val:string = this.inputValue
              this.createByCallback()
              this.listVoicesCallback(this.inputValueIdx.toString())
              this.speak(val,this.inputValueIdx.toString())
            }else {
              ttsEngine.shutdown()
            }
          })
      }.width(70)
      .height(70)
      .borderWidth(2)
      .borderColor(0xFFFFFF)
      .borderRadius(35)
      .justifyContent(FlexAlign.Center)
      .alignItems(HorizontalAlign.Center)
      .stateStyles({
        normal:{.backgroundColor(0xF9F3EF)},
        pressed:{.backgroundColor(0xFFEFE5)}
      })
      .onClick(()=>{
        this.inputValueIdx = this.inputValueIdx++
        this.isPlay = !this.isPlay
        if (this.isPlay == true){
          let val:string = this.inputValue
          this.createByCallback()

          this.listVoicesCallback(this.inputValueIdx.toString())
          this.speak(val,this.inputValueIdx.toString())
        }else {
          ttsEngine.shutdown()
        }
      })
    }.width("100%")
    .height("100%")
    .justifyContent(FlexAlign.Center)
    .backgroundColor(0xfadf99)
  }
}

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