#ifndef _JPEG_FRAME_VIEW_H
#define _JPEG_FRAME_VIEW_H 1
-#include <QGraphicsView>
-#include <QGraphicsPixmapItem>
-#include <QGraphicsScene>
+#include <epoxy/gl.h>
+#include <QGLWidget>
#include <stdint.h>
-class JPEGFrameView : public QGraphicsView {
+#include <movit/effect_chain.h>
+#include <movit/ycbcr_input.h>
+
+#include <memory>
+
+struct JPEGID {
+ unsigned stream_idx;
+ int64_t pts;
+ bool interpolated;
+};
+struct Frame {
+ std::unique_ptr<uint8_t[]> y, cb, cr;
+ unsigned width, height;
+ unsigned chroma_subsampling_x, chroma_subsampling_y;
+ unsigned pitch_y, pitch_chroma;
+};
+enum CacheMissBehavior {
+ DECODE_IF_NOT_IN_CACHE,
+ RETURN_NULLPTR_IF_NOT_IN_CACHE
+};
+
+std::string filename_for_frame(unsigned stream_idx, int64_t pts);
+std::shared_ptr<Frame> decode_jpeg(const std::string &filename);
+std::shared_ptr<Frame> decode_jpeg_with_cache(JPEGID id, CacheMissBehavior cache_miss_behavior, bool *did_decode);
+
+class JPEGFrameView : public QGLWidget {
Q_OBJECT
public:
JPEGFrameView(QWidget *parent);
- void setFrame(unsigned stream_idx, int64_t pts)
- {
- this->stream_idx = stream_idx;
- this->pts = pts;
- update();
- }
+ void setFrame(unsigned stream_idx, int64_t pts, bool interpolated);
+ static void insert_interpolated_frame(unsigned stream_idx, int64_t pts, std::shared_ptr<Frame> frame);
+
+ void mousePressEvent(QMouseEvent *event) override;
+
+ unsigned get_stream_idx() const { return current_stream_idx; }
+
+ void setDecodedFrame(std::shared_ptr<Frame> frame);
+
+
+signals:
+ void clicked();
protected:
- void resizeEvent(QResizeEvent *event) override;
+ void initializeGL() override;
+ void resizeGL(int width, int height) override;
+ void paintGL() override;
private:
- void update();
-
- QGraphicsPixmapItem item;
- QGraphicsScene scene;
+ // The stream index of the latest frame we displayed.
+ unsigned current_stream_idx;
- unsigned stream_idx;
- int64_t pts;
+ std::unique_ptr<movit::EffectChain> chain;
+ std::shared_ptr<Frame> current_frame; // So that we hold on to the pixels.
+ movit::YCbCrInput *ycbcr_input;
+ movit::YCbCrFormat ycbcr_format;
};
#endif // !defined(_JPEG_FRAME_VIEW_H)