LowPassFilter.h

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#ifndef GRT_LOW_PASS_FILTER_HEADER
#define GRT_LOW_PASS_FILTER_HEADER

#include "../CoreModules/PreProcessing.h"

GRT_BEGIN_NAMESPACE

class GRT_API LowPassFilter : public PreProcessing{
public:
 LowPassFilter(Float filterFactor = 0.1,Float gain = 1,UINT numDimensions = 1,Float cutoffFrequency = -1,Float delta = -1);
 
 LowPassFilter(const LowPassFilter &rhs);
 
 virtual ~LowPassFilter();
 
 LowPassFilter& operator=(const LowPassFilter &rhs);
 
 virtual bool deepCopyFrom(const PreProcessing *preProcessing);
 
 virtual bool process(const VectorFloat &inputVector);
 
 virtual bool reset();
 
 virtual bool save( std::fstream &file ) const;
 
 virtual bool load( std::fstream &file );
 
 bool init(Float filterFactor,Float gain,UINT numDimensions);
 
 Float filter(const Float x);
 
 VectorFloat filter(const VectorFloat &x);
 
 bool setGain(Float gain);
 
 bool setFilterFactor(Float filterFactor);
 
 bool setCutoffFrequency(Float cutoffFrequency,Float delta);
 
 Float getFilterFactor(){ if( initialized ){ return filterFactor; } return 0; }
 
 Float getGain(){ if( initialized ){ return gain; } return 0; }
 
 VectorFloat getFilteredValues(){ if( initialized ){ return yy; } return VectorFloat(); }
 
 //Tell the compiler we are using the following functions from the MLBase class to stop hidden virtual function warnings
 using MLBase::save;
 using MLBase::load;
 
protected:
 Float filterFactor; 
 Float gain; 
 VectorFloat yy; 
 
 static RegisterPreProcessingModule< LowPassFilter > registerModule;
};

GRT_END_NAMESPACE

#endif //GRT_LOW_PASS_FILTER_HEADER