第一次提交

src/utils/lyric.ts

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+export interface LyricLine {
+  time: number;  // 秒
+  text: string;
+}
+
+export function parseLrc(lrcStr: string): LyricLine[] {
+  const lines = lrcStr.split('\n');
+  const result: LyricLine[] = [];
+  const timeReg = /\[(\d{2}):(\d{2})\.(\d{2,3})\]/;
+  for (const line of lines) {
+    const match = line.match(timeReg);
+    if (match) {
+      const min = parseInt(match[1], 10);
+      const sec = parseInt(match[2], 10);
+      const ms = parseInt(match[3], 10) / (match[3].length === 3 ? 1000 : 100);
+      const time = min * 60 + sec + ms;
+      const text = line.replace(timeReg, '').trim();
+      if (text) {
+        result.push({ time, text });
+      }
+    }
+  }
+  // 按时长排序
+  result.sort((a, b) => a.time - b.time);
+  return result;
+}
+
+export function getCurrentLyricIndex(lyrics: LyricLine[], currentTime: number): number {
+  let index = -1;
+  for (let i = 0; i < lyrics.length; i++) {
+    if (currentTime >= lyrics[i].time) {
+      index = i;
+    } else {
+      break;
+    }
+  }
+  return index;
+}