diff options
| author | Stanislaw Halik <sthalik@misaki.pl> | 2014-09-06 03:50:52 -0700 |
|---|---|---|
| committer | Stanislaw Halik <sthalik@misaki.pl> | 2014-09-06 03:50:52 -0700 |
| commit | db59542cbb2fc3c2ac1b40928d514113bced8b0b (patch) | |
| tree | 88b9c5efe598aed10bb82c54bfcc04a638866f0d /ftnoir_tracker_pt/frame_observer.h | |
| parent | b2167e6cba93106e3e6fa4a8337ebadbf049c1f8 (diff) | |
rename case
Diffstat (limited to 'ftnoir_tracker_pt/frame_observer.h')
| -rw-r--r-- | ftnoir_tracker_pt/frame_observer.h | 76 |
1 files changed, 76 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..585a6ee7 --- /dev/null +++ b/ftnoir_tracker_pt/frame_observer.h @@ -0,0 +1,76 @@ +/* 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>
+#ifndef OPENTRACK_API
+# include <boost/shared_ptr.hpp>
+#else
+# include "FTNoIR_Tracker_PT/boost-compat.h"
+#endif
+#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
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