Propagate errors on video opening back to the UI.

[pkanalytics] / video_widget.h

diff --git a/video_widget.h b/video_widget.h
index dc7d0ab7b3f834285b1da2feabd3a2e06417a927..c0f28d75ec7ad8ff99e14e245e49e51054385a93 100644 (file)
--- a/video_widget.h
+++ b/video_widget.h
@@ -25,7 +25,7 @@ public:
        VideoWidget(QWidget *parent);
        ~VideoWidget() { stop(); }
 
-       void open(const std::string &filename);
+       bool open(const std::string &filename);  // False on error.
        void play();
        uint64_t get_position() const { return last_position; }  // In milliseconds.
        void pause();
@@ -77,7 +77,8 @@ private:
        int64_t pts_origin;
        int64_t last_pts;
        std::atomic<uint64_t> last_position{0};  // TODO: sort of redundant wrt. last_pts (but this one can be read from the other thread)
-       std::atomic<bool> running{false};
+       enum RunState { NOT_RUNNING, STARTING, RUNNING, VIDEO_FILE_ERROR };  // NOT_RUNNING and VIDEO_FILE_ERROR both imply that the thread isn't running and can freely be restarted.
+       std::atomic<RunState> running{NOT_RUNNING};
        bool paused = false;
        std::chrono::steady_clock::time_point start, next_frame_start, last_frame;