Video.h

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#ifndef _VIDEO_H
#define _VIDEO_H

#include "../../util/Thread.h"
#include "../Numerical.h"

class FEATURE_EXPORT_CLASS VideoMotionFeature : public NumericalContinuousFeature
{
        friend class VideoFeatureProvider;
        
        protected:
                VideoMotionFeature(double* minval, double* maxval) : NumericalContinuousFeature(minval, maxval) {}
                VideoMotionFeature(double* minval, double* maxval, double val) : NumericalContinuousFeature(minval, maxval, val) {}

        public:
                virtual const string getName() const { return "Video.Motion"; }

#if _DEBUG_FEATURES
                virtual string toString() const;
#endif
};


class FEATURE_EXPORT_CLASS VideoFeatureProvider : public FeatureProvider, public Thread
{
        private:
                struct SampleData {
                        double average;
                        unsigned long average_counter;
                        
                        SampleData() {
                                average_counter = 0;
                                average = 0.0;
                        }
                };

                stringvector features;


                string deviceName;
                int height, width, frequency;

                double videoMotionFeature_minval;
                double videoMotionFeature_maxval;

                double curMotion;
                mutable Lock lockCurMotion;
                
                // helper methods;
                char* v4l_start();
        
        public:
                VideoFeatureProvider(providerparams &params);
                virtual ~VideoFeatureProvider();

                virtual Feature* getFeature(string name) const;
                virtual Feature* getSample(string name) const;
                virtual void nextSample(clock_t checkpoint);
                
                virtual void run();
};

#endif // _VIDEO_H

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