1 files changed, 95 insertions, 0 deletions
diff --git a/tracker-pt/camera.h b/tracker-pt/camera.h
new file mode 100644
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+++ b/tracker-pt/camera.h
@@ -0,0 +1,95 @@
+/* Copyright (c) 2012 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.
+ */
+
+#pragma once
+
+#include <opencv2/core/core.hpp>
+#include <memory>
+#include <opencv2/highgui.hpp>
+#include <string>
+
+struct CamInfo
+{
+    CamInfo() : res_x(0), res_y(0), fps(0) {}
+
+    int res_x;
+    int res_y;
+    int fps;
+};
+
+// ----------------------------------------------------------------------------
+// Base class for cameras, calculates the frame rate
+class Camera
+{
+public:
+        Camera() : dt_valid(0), dt_mean(0), desired_index(0), active_index(-1) {}
+        virtual ~Camera() = 0;
+
+        // start/stop capturing
+        virtual void start() = 0;
+        virtual void stop() = 0;
+        void restart() { stop(); start(); }
+
+        // calls corresponding template methods and reinitializes frame rate calculation
+        void set_device_index(int index);
+        void set_fps(int fps);
+        void set_res(int x_res, int y_res);
+
+        // gets a frame from the camera, dt: time since last call in seconds
+        bool get_frame(float dt, cv::Mat* frame);
+
+        // WARNING: returned references are valid as long as object
+        bool get_info(CamInfo &ret);
+        CamInfo get_desired() const { return cam_desired; }
+
+protected:
+        // get a frame from the camera
+        virtual bool _get_frame(cv::Mat* frame) = 0;
+
+        // update the camera using cam_desired, write res and f to cam_info if successful
+        virtual void _set_device_index() = 0;
+        virtual void _set_fps() = 0;
+        virtual void _set_res() = 0;
+private:
+        float dt_valid;
+        float dt_mean;
+protected:
+        int desired_index;
+        int active_index;
+        CamInfo cam_info;
+        CamInfo cam_desired;
+};
+inline Camera::~Camera() {}
+
+// ----------------------------------------------------------------------------
+// camera based on OpenCV's videoCapture
+class CVCamera : public Camera
+{
+public:
+    CVCamera() : cap(NULL) {}
+    ~CVCamera() { stop(); }
+
+    void start() override;
+    void stop() override;
+
+    operator cv::VideoCapture*() { return cap; }
+
+protected:
+    bool _get_frame(cv::Mat* frame) override;
+    void _set_fps() override;
+    void _set_res() override;
+    void _set_device_index() override;
+private:
+    cv::VideoCapture* cap;
+};
+
+enum RotationType
+{
+    CLOCKWISE = 0,
+    ZERO = 1,
+    COUNTER_CLOCKWISE = 2
+};