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