video_dialog.h

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#ifndef VIDEO_DIALOG_H
#define VIDEO_DIALOG_H
 
#include <memory>
#include <QDialog>
#include <QtAV>
#include <QSlider>
#include <QPushButton>
#include <QCloseEvent>
#include <QtAV/FrameReader.h>
#include "ui_video_dialog.h"
 
#include "qoi.h"
 
class ImageLabel : public QWidget
{
  Q_OBJECT
 
public:
  explicit ImageLabel(QWidget* parent = nullptr);
  const QPixmap* pixmap() const;
 
public slots:
  void setPixmap(const QPixmap&);
 
protected:
  void paintEvent(QPaintEvent*);
 
private:
  QPixmap pix;
};
 
class VideoDialog : public QDialog
{
  Q_OBJECT
 
public:
  explicit VideoDialog(QWidget* parent = nullptr);
  ~VideoDialog();
 
  QString referenceCurve() const;
 
  void pause(bool paused);
 
  bool isPaused() const;
 
  Ui::VideoDialog* ui;
 
  bool loadFile(QString filename);
 
private slots:
  void on_loadButton_clicked();
 
  void on_timeSlider_valueChanged(int value);
 
  void closeEvent(QCloseEvent* event)
  {
    emit closed();
  }
 
public Q_SLOTS:
 
  void seekByValue(double value);
 
private Q_SLOTS:
  void updateSliderPos(qint64 value);
  void updateSlider();
  void updateSliderUnit();
 
  void on_clearButton_clicked();
 
  void on_decodeButton_clicked();
 
signals:
 
  void closed();
 
private:
  QtAV::VideoOutput* _video_output;
  QtAV::AVPlayer* _media_player;
  std::unique_ptr<QtAV::FrameReader> _frame_reader;
  // std::vector<QImage> _frames;
  struct CompressedFrame
  {
    CompressedFrame() : length(0), data(nullptr)
    {
    }
    CompressedFrame(const CompressedFrame&) = delete;
    CompressedFrame(CompressedFrame&& other) : length(0), data(nullptr)
    {
      std::swap(other.data, data);
      std::swap(other.length, length);
    }
 
    ~CompressedFrame()
    {
      if (data)
        free(data);
    }
 
    int length;
    qoi_desc info;
    void* data;
  };
  std::vector<CompressedFrame> _compressed_frames;
 
  bool eventFilter(QObject* obj, QEvent* ev);
  QString _dragging_curve;
 
  ImageLabel* _label;
 
  bool _decoded = false;
};
 
#endif  // VIDEO_DIALOG_H