musiclrcanalysis.h

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#ifndef MUSICLRCANALYSIS_H
#define MUSICLRCANALYSIS_H

/***************************************************************************
 * This file is part of the TTK Music Player project
 * Copyright (C) 2015 - 2026 Greedysky Studio

 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License along
 * with this program; If not, see <http://www.gnu.org/licenses/>.
 ***************************************************************************/

#include "musicglobaldefine.h"

static constexpr int MUSIC_LRC_INTERIOR_MAX_LINE = 11;

class TTK_MODULE_EXPORT MusicLrcAnalysis : public QObject
{
    Q_OBJECT
public:
    enum class State
    {
        Success,    
        Failed      
    };

    enum class Format
    {
        Type01,     
        Type02,     
        Type03,     
        Type04,     
        Type05,     
        Type06,     
        Type07,     
        Type08,     
        Type09,     
        Type10,     
        Type11,     
        Type12,     
        Type13,     
        Type14      
    };

    explicit MusicLrcAnalysis(QObject *parent = nullptr);

    inline void setMaximum(int max) noexcept { m_maximum = max; }
    inline int maximum() const noexcept { return m_maximum; }
    inline int middle() const noexcept { return m_maximum / 2; }

    State loadFromFile(const QString &path);
    State loadFromBuffer(const TTKIntStringMap &data);
    void save();

    void setTimePosition(qint64 pos);
    qint64 findTimePosition(qint64 time);

    inline void setCurrentIndex(int index) noexcept { m_currentIndex = index; }
    inline int currentIndex() const noexcept { return m_currentIndex; }
    inline void setFilePath(const QString &name) noexcept { m_filePath = name; }
    inline QString filePath() const noexcept { return m_filePath; }

    void clear() noexcept;
    bool isValid() const noexcept;
    bool isEmpty() const noexcept;
    int count() const noexcept;

    QString text(int index) const;
    bool findText(qint64 current, qint64 total, QString &pre, QString &last, qint64 &interval) const;
    qint64 findTime(int index) const;
    qint64 findTime(const QStringList &ts) const;

    QString dataString() const;
    QStringList dataList() const;

private:
    State initialize();
    void matchLrcLine(const QString &oneLine);
    void matchLrcLine(const QString &oneLine, const QString &cap, const QString &first, const QString &second);
    void matchLrcLine(const QString &oneLine, QString cap, const QString &splite);
    void matchLrcLine(const QString &oneLine, const QString &cap, const QString &first, const QString &second, const QString &third);

    int m_maximum, m_currentIndex;
    QString m_filePath;
    TTKIntStringMap m_lrcContainer;
    QStringList m_currentShowLrcContainer;

};

#endif // MUSICLRCANALYSIS_H