std::shared_ptr is surprisingly not thread-safe, so we need a mutex.

[pkanalytics] / video_widget.h

diff --git a/video_widget.h b/video_widget.h
index 1f1ffe2ffb6b8f752fff942a031108dce94f6477..dc7d0ab7b3f834285b1da2feabd3a2e06417a927 100644 (file)
--- a/video_widget.h
+++ b/video_widget.h
@@ -56,7 +56,8 @@ private:
                unsigned chroma_width, chroma_height;
                std::unique_ptr<uint8_t[]> data;  // Y, followed by Cb, followed by Cr.
        };
-       std::shared_ptr<Frame> current_frame;
+       std::mutex current_frame_mu;
+       std::shared_ptr<Frame> current_frame;  // Protected by current_frame_mu.
        std::deque<AVFrameWithDeleter> queued_frames;  // Frames decoded but not displayed. Only used when frame-stepping backwards.
 
        GLuint ycbcr_vertex_shader, ycbcr_fragment_shader, ycbcr_program;