feat: basic lyrics support

lyricsmanager.h

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: 2024 Gary Wang <git@blumia.net>
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <QHash>
+#include <QList>
+#include <QObject>
+
+class LyricsManager : public QObject
+{
+    Q_OBJECT
+public:
+    explicit LyricsManager(QObject *parent);
+    ~LyricsManager();
+
+    bool loadLyrics(QString filepath);
+    bool hasLyrics() const;
+    void updateCurrentTimeMs(int curTimeMs, int totalTimeMs);
+    QString lyrics(int lineOffset = 0) const;
+    double maskPercent(int curTimeMs);
+
+protected:
+
+
+private:
+    void reset();
+    int currentLyricsTime() const;
+    int nextLyricsTime() const;
+
+    QHash<int, QString> m_lyricsMap;
+    QList<int> m_timestampList;
+    int m_currentLyricsTime = 0;
+    int m_nextLyricsTime = 0;
+    int m_timeOffset = 0;
+};