player.h Example File

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 #ifndef PLAYER_H
 #define PLAYER_H

 #include <QWidget>
 #include <QMediaPlayer>
 #include <QMediaPlaylist>

 class QAbstractItemView;
 class QLabel;
 class QMediaPlayer;
 class QModelIndex;
 class QPushButton;
 class QSlider;
 class QStatusBar;
 class QVideoProbe;
 class QVideoWidget;
 class QAudioProbe;

 class PlaylistModel;
 class HistogramWidget;

 class Player : public QWidget
 {
     Q_OBJECT

 public:
     explicit Player(QWidget *parent = nullptr);
     ~Player();

     bool isPlayerAvailable() const;

     void addToPlaylist(const QList<QUrl> &urls);
     void setCustomAudioRole(const QString &role);

 signals:
     void fullScreenChanged(bool fullScreen);

 private slots:
     void open();
     void durationChanged(qint64 duration);
     void positionChanged(qint64 progress);
     void metaDataChanged();

     void previousClicked();

     void seek(int seconds);
     void jump(const QModelIndex &index);
     void playlistPositionChanged(int);

     void statusChanged(QMediaPlayer::MediaStatus status);
     void stateChanged(QMediaPlayer::State state);
     void bufferingProgress(int progress);
     void videoAvailableChanged(bool available);

     void displayErrorMessage();

     void showColorDialog();

 private:
     void clearHistogram();
     void setTrackInfo(const QString &info);
     void setStatusInfo(const QString &info);
     void handleCursor(QMediaPlayer::MediaStatus status);
     void updateDurationInfo(qint64 currentInfo);

     QMediaPlayer *m_player = nullptr;
     QMediaPlaylist *m_playlist = nullptr;
     QVideoWidget *m_videoWidget = nullptr;
     QLabel *m_coverLabel = nullptr;
     QSlider *m_slider = nullptr;
     QLabel *m_labelDuration = nullptr;
     QPushButton *m_fullScreenButton = nullptr;
     QPushButton *m_colorButton = nullptr;
     QDialog *m_colorDialog = nullptr;
     QLabel *m_statusLabel = nullptr;
     QStatusBar *m_statusBar = nullptr;

     QLabel *m_labelHistogram = nullptr;
     HistogramWidget *m_videoHistogram = nullptr;
     HistogramWidget *m_audioHistogram = nullptr;
     QVideoProbe *m_videoProbe = nullptr;
     QAudioProbe *m_audioProbe = nullptr;

     PlaylistModel *m_playlistModel = nullptr;
     QAbstractItemView *m_playlistView = nullptr;
     QString m_trackInfo;
     QString m_statusInfo;
     qint64 m_duration;
 };

 #endif // PLAYER_H