#ifndef _JPEG_FRAME_VIEW_H
#define _JPEG_FRAME_VIEW_H 1
-#include <QGraphicsView>
-#include <QGraphicsPixmapItem>
-#include <QGraphicsScene>
+#include "jpeg_frame.h"
+#include "ycbcr_converter.h"
+#include <QGLWidget>
+#include <epoxy/gl.h>
+#include <memory>
+#include <movit/effect_chain.h>
+#include <movit/flat_input.h>
+#include <movit/mix_effect.h>
+#include <movit/ycbcr_input.h>
#include <stdint.h>
+#include <thread>
-#include <memory>
+struct JPEGID {
+ unsigned stream_idx;
+ int64_t pts;
+ bool interpolated;
+};
+enum CacheMissBehavior {
+ DECODE_IF_NOT_IN_CACHE,
+ RETURN_NULLPTR_IF_NOT_IN_CACHE
+};
+
+// This is, well, a hack. We hope for no collisions.
+inline JPEGID create_jpegid_for_interpolated_fade(unsigned stream_idx, int64_t pts, unsigned secondary_stream_idx, int64_t secondary_pts)
+{
+ JPEGID id;
+ id.stream_idx = (stream_idx << 8) | secondary_stream_idx;
+
+ uint64_t rot = secondary_stream_idx;
+ rot = (rot << 32) | (rot >> 32);
+ id.pts = pts ^ int64_t(rot);
+ id.interpolated = true;
+ return id;
+}
+
+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 QGraphicsView {
+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_frame();
- }
+ void setFrame(unsigned stream_idx, int64_t pts, bool interpolated, int secondary_stream_idx = -1, int64_t secondary_pts = -1, float fade_alpha = 0.0f);
+ static void insert_interpolated_frame(JPEGID id, std::shared_ptr<Frame> frame);
- void setPixmap(std::shared_ptr<QPixmap> pixmap);
+ void mousePressEvent(QMouseEvent *event) override;
+
+ unsigned get_stream_idx() const { return current_stream_idx; }
+
+ void setDecodedFrame(std::shared_ptr<Frame> frame, std::shared_ptr<Frame> secondary_frame, float fade_alpha);
+ void set_overlay(const std::string &text); // Blank for none.
+
+ static void shutdown();
+
+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_frame();
+ // The stream index of the latest frame we displayed.
+ unsigned current_stream_idx = 0;
- QGraphicsPixmapItem item;
- QGraphicsScene scene;
+ std::unique_ptr<YCbCrConverter> ycbcr_converter;
+ movit::EffectChain *current_chain = nullptr; // Owned by ycbcr_converter.
- unsigned stream_idx;
- int64_t pts;
- bool dirty = false;
+ std::shared_ptr<Frame> current_frame; // So that we hold on to the pixels.
+ std::shared_ptr<Frame> current_secondary_frame; // Same.
+
+ static constexpr int overlay_base_width = 16, overlay_base_height = 16;
+ int overlay_width = overlay_base_width, overlay_height = overlay_base_height;
+ std::unique_ptr<QImage> overlay_image; // If nullptr, no overlay.
+ std::unique_ptr<movit::EffectChain> overlay_chain; // Just to get the overlay on screen in the easiest way possible.
+ movit::FlatInput *overlay_input;
+ bool overlay_input_needs_refresh = false;
+
+ int gl_width, gl_height;
+
+ static std::thread jpeg_decoder_thread;
};
#endif // !defined(_JPEG_FRAME_VIEW_H)