Vue3 融合智能分句算法接入魔珐星云：开发高拟真文旅导览大屏

// src/utils/textSplitter.ts
const MIN_SPLIT_LENGTH = 2;  // 最小切分长度，防止单字发音卡顿
const MAX_SPLIT_LENGTH = 20; // 最大切分长度，防止单次合成过长阻塞渲染

export function splitSentence(text: string): string[] {
  if (!text) return [];
  
  const chinesePunctuations = new Set(['、', '，', '：', '；', '。', '？', '！', '…', '\n']);
  const englishPunctuations = new Set([',', ':', ';', '.', '?', '!']);
  
  let count = 0;
  let firstValidPunctAfterMin = -1; 
  let forceBreakIndex = -1; 
  let i = 0;
  const n = text.length;
 
  while (i < n && count < MAX_SPLIT_LENGTH) {
    const char = text[i];
    // 处理汉字与英文单词计数
    if (char >= '\u4e00' && char <= '\u9fff') {
      count++;
      if (count === MAX_SPLIT_LENGTH) forceBreakIndex = i + 1;
      i++;
    } else if (/[a-zA-Z]/.test(char)) {
      i++;
      while (i < n && /[a-zA-Z]/.test(text[i])) i++;
      count++;
      if (count === MAX_SPLIT_LENGTH) forceBreakIndex = i;
    } else {
      // 标点符号寻址逻辑
      if (chinesePunctuations.has(char)) {
        if (count >= MIN_SPLIT_LENGTH && firstValidPunctAfterMin === -1) firstValidPunctAfterMin = i;
        i++;
      } else if (englishPunctuations.has(char)) {
        if (i + 1 >= n || text[i + 1] === ' ') {
          if (count >= MIN_SPLIT_LENGTH && firstValidPunctAfterMin === -1) firstValidPunctAfterMin = i;
        }
        i++;
      } else { i++; }
    }
  }

  // 确定最终切分位置
  let splitIndex = firstValidPunctAfterMin !== -1 ? firstValidPunctAfterMin + 1 : forceBreakIndex;

  if (splitIndex > 0 && splitIndex < text.length) {
    return [text.substring(0, splitIndex), text.substring(splitIndex)];
  }
  return [text];
}

// src/composables/useAsr.ts
import { ref, unref, Ref } from 'vue';

export function useAsr(configSource: AsrConfig | Ref<AsrConfig>) {
  const asrText = ref('');
  const isListening = ref(false);
  let webAudioRecognizer: any = null;

  const start = (callbacks: AsrCallbacks, vadSilenceTime: number = 300) => {
    if (isListening.value) return console.warn('语音识别已在进行中');
    
    const config = unref(configSource);
    webAudioRecognizer = new window.WebAudioSpeechRecognizer({
      appid: config.appId,
      secretid: config.secretId,
      secretkey: config.secretKey,
      engine_model_type: '16k_zh',
      needvad: 1, // 开启静音检测
      vad_silence_time: vadSilenceTime 
    });
    
    // 监听句末回调，更新 Vue 响应式数据
    webAudioRecognizer.OnSentenceEnd = (res: any) => {
      const resultText = res.result?.voice_text_str;
      if (resultText) {
        asrText.value = resultText;
        callbacks.onFinished(resultText); // 将识别文本抛出给 LLM
      }
    };
    
    webAudioRecognizer.start();
    isListening.value = true;
  };

  const stop = () => {
    if (webAudioRecognizer) webAudioRecognizer.stop();
    isListening.value = false;
  };

  return { asrText, isListening, start, stop };
}