diff options
| author | Stanislaw Halik <sthalik@misaki.pl> | 2013-09-15 12:39:32 +0200 |
|---|---|---|
| committer | Stanislaw Halik <sthalik@misaki.pl> | 2013-09-15 12:39:32 +0200 |
| commit | bef7aff31e5ea073f0f160ca6a2f1e56b7dd881a (patch) | |
| tree | 2f6122f682427322f925736e87a0bd68b658972c /FTNoIR_Tracker_PT/frame_observer.h | |
| parent | 3734ab61a6f0d4d8aad32a17a2eb5fc49245626e (diff) | |
Initial PT 1.1 import
Codebase broken at this stage
Diffstat (limited to 'FTNoIR_Tracker_PT/frame_observer.h')
| -rw-r--r-- | FTNoIR_Tracker_PT/frame_observer.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/FTNoIR_Tracker_PT/frame_observer.h b/FTNoIR_Tracker_PT/frame_observer.h new file mode 100644 index 00000000..4afbd72c --- /dev/null +++ b/FTNoIR_Tracker_PT/frame_observer.h @@ -0,0 +1,72 @@ +/* Copyright (c) 2013 Patrick Ruoff
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+
+#ifndef FRAME_OBSERVER_H
+#define FRAME_OBSERVER_H
+
+#include <QMutex>
+#include <opencv2/opencv.hpp>
+#include <boost/shared_ptr.hpp>
+#include <set>
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+class FrameObserver;
+
+//-----------------------------------------------------------------------------
+// Provides means to copy frame and point information if it has observers
+// Instantiate a FrameObserver to get the information
+class FrameProvider
+{
+ friend class FrameObserver;
+public:
+ ~FrameProvider();
+
+protected:
+ virtual bool get_frame_and_points(cv::Mat& frame, boost::shared_ptr< std::vector<cv::Vec2f> >& points) = 0;
+
+ bool has_observers() const { QMutexLocker lock(&observer_mutex); return !frame_observers.empty(); }
+
+private:
+ mutable QMutex observer_mutex;
+ void add_observer(FrameObserver* obs) { QMutexLocker lock(&observer_mutex); frame_observers.insert(obs); }
+ void remove_observer(FrameObserver* obs) { QMutexLocker lock(&observer_mutex); frame_observers.erase(obs); }
+ std::set<FrameObserver*> frame_observers;
+};
+
+//-----------------------------------------------------------------------------
+// Used to get frame and point information from MutexedFrameProvider
+// Destroy instance if not interested anymore since a living
+// FrameObserver instance causes MutexedFrameProvider to provide the information,
+// potentially reducing its performance
+class FrameObserver
+{
+public:
+ FrameObserver(FrameProvider* provider) : provider(provider) {
+ provider->add_observer(this);
+ }
+
+ ~FrameObserver() {
+ if (provider) provider->remove_observer(this);
+ }
+
+ bool get_frame_and_points(cv::Mat& frame, boost::shared_ptr< std::vector<cv::Vec2f> >& points) {
+ return provider ? provider->get_frame_and_points(frame, points) : false;
+ }
+
+ void on_frame_provider_destroy() {
+ provider = NULL;
+ }
+
+protected:
+ FrameProvider* provider;
+
+private:
+ FrameObserver(const FrameObserver&);
+};
+
+#endif //FRAME_OBSERVER_H
\ No newline at end of file |