鸿蒙NEXT开发中使用星闪服务 原创

import featureAbility from '@ohos.ability.featureAbility';
import want from '@ohos.want';
import { CommonEvent, CommonEventPublishInfo, CommonEventSubscribeInfo, CommonEventListener, CommonEventSubscribeInfoMatcher, CommonEventPublishInfoMatcher } from '@ohos.commonevent';
import { AudioRecord, AudioPlayer } from '@ohos.media.audio';
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// 星闪广播
function startNearLinkBroadcast() {
  const publishInfo = new CommonEventPublishInfo();
  publishInfo.event = 'com.vin.harmony.nearlink.audio';
  publishInfo.data = 'start_audio_capture';

  CommonEvent.publish(publishInfo, (err, data) => {
    if (err) {
      console.error('Failed to publish nearlink event:', err);
    } else {
      console.log('Nearlink event published successfully');
    }
  });
}

// 星闪接收
function onNearLinkEvent(event) {
  if (event.matchType === CommonEventSubscribeInfoMatcher.ABILITY && event.eventId === 'com.example.harmony.nearlink.audio') {
    const audioData = event.data;
    if (audioData === 'start_audio_capture') {
      startAudioCapture();
    }
  }
}

// 订阅星闪事件
function subscribeNearLinkEvent() {
  const subscribeInfo = new CommonEventSubscribeInfo();
  subscribeInfo.events = ['com.vin.harmony.nearlink.audio'];
  subscribeInfo.matchType = CommonEventSubscribeInfoMatcher.ABILITY;

  CommonEvent.subscribe(subscribeInfo, (err, data) => {
    if (err) {
      console.error('Failed to subscribe nearlink event:', err);
    } else {
      console.log('Subscribed to nearlink event successfully');
    }
  });
}
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// 开始音频采集
function startAudioCapture() {
  const audioRecord = new AudioRecord({
    sampleRate: 44100,
    channels: 2,
    encoding: AudioRecord.AudioEncoding.PCM_16_BIT,
    callback: (buffer) => {
      // 处理音频数据，例如进行降噪处理
      processAudioData(buffer);
    }
  });

  audioRecord.start();
}

// 处理音频数据
function processAudioData(buffer) {
  // 这里可以添加降噪算法，例如使用FFT进行频域分析和滤波
  // 假设降噪后的数据存储在bufferProcessed中
  const bufferProcessed =降噪算法(buffer);

  // 播放处理后的音频
  playProcessedAudio(bufferProcessed);
}

// 播放处理后的音频
function playProcessedAudio(buffer) {
  const audioPlayer = new AudioPlayer();
  audioPlayer.play(buffer, (err) => {
    if (err) {
      console.error('Failed to play audio:', err);
    }
  });
}
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// 在Ability的onStart中初始化和启动
export default featureAbility({
  data: {
  },
  onStart: function () {
    subscribeNearLinkEvent();
  },
  onStop: function () {
    // 取消订阅星闪事件
    CommonEvent.unsubscribe(subscribeInfo);
  },
  // 其他Ability生命周期方法...
});
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