Implementation of Recorder class. For now, only a capture to PNG is

available, but the mechanism is in place for video capture.

Recorder.h

@@ -0,0 +1,37 @@
+#ifndef RECORDER_H
+#define RECORDER_H
+
+#include <atomic>
+#include <string>
+#include <gst/gst.h>
+
+class FrameBuffer;
+
+class Recorder
+{
+public:
+    Recorder();
+    virtual ~Recorder() {}
+
+    virtual void addFrame(const FrameBuffer *frame_buffer, float dt) = 0;
+
+    inline bool finished() const { return finished_; }
+    inline bool enabled() const { return enabled_; }
+
+protected:
+    std::atomic<bool> enabled_;
+    std::atomic<bool> finished_;
+};
+
+class FrameRecorder : public Recorder
+{
+    std::string     filename_;
+
+public:
+
+    FrameRecorder();
+    void addFrame(const FrameBuffer *frame_buffer, float dt);
+
+};
+
+#endif // RECORDER_H