ZeroCrossingCounter.h

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#ifndef GRT_ZERO_CROSSING_COUNTER_HEADER
#define GRT_ZERO_CROSSING_COUNTER_HEADER

#include "../../CoreModules/FeatureExtraction.h"
#include "../../PreProcessingModules/Derivative.h"
#include "../../PreProcessingModules/DeadZone.h"

GRT_BEGIN_NAMESPACE
 
class GRT_API ZeroCrossingCounter : public FeatureExtraction{
public:
 ZeroCrossingCounter(UINT searchWindowSize = 20,Float deadZoneThreshold = 0.01,UINT numDimensions = 1,UINT featureMode = INDEPENDANT_FEATURE_MODE);
 
 ZeroCrossingCounter(const ZeroCrossingCounter &rhs);
 
 virtual ~ZeroCrossingCounter();
 
 ZeroCrossingCounter& operator=(const ZeroCrossingCounter &rhs);

 virtual bool deepCopyFrom(const FeatureExtraction *featureExtraction);
 
 virtual bool computeFeatures(const VectorFloat &inputVector);
 
 virtual bool reset();
 
 virtual bool saveModelToFile( std::string filename ) const;
 
 virtual bool loadModelFromFile( std::string filename );
 
 virtual bool saveModelToFile( std::fstream &file ) const;
 
 virtual bool loadModelFromFile( std::fstream &file );

 bool init(UINT searchWindowSize,Float deadZoneThreshold,UINT numDimensions,UINT featureMode);
 
 VectorFloat update(Float x);
 
 VectorFloat update(const VectorFloat &x);
 
 bool setSearchWindowSize(UINT searchWindowSize);

 bool setFeatureMode(UINT featureMode);
 
 bool setDeadZoneThreshold(Float deadZoneThreshold);

 UINT getSearchWindowSize(){ if( initialized ){ return searchWindowSize; } return 0; }
 
 UINT getNumFeatures(){ return TOTAL_NUM_ZERO_CROSSING_FEATURES; }
 
 UINT getFeatureMode(){ return featureMode; }
 
 Float getDeadZoneThreshold(){ if( initialized ){ return deadZoneThreshold; } return 0; }
 
 CircularBuffer< VectorFloat > getDataBuffer(){ if( initialized ){ return dataBuffer; } return CircularBuffer< VectorFloat >(); }
 
 //Tell the compiler we are using the following functions from the MLBase class to stop hidden virtual function warnings
 using FeatureExtraction::saveModelToFile;
 using FeatureExtraction::loadModelFromFile;
 using MLBase::train;
 using MLBase::train_;
 using MLBase::predict;
 using MLBase::predict_;
 
protected:
 UINT searchWindowSize; 
 UINT featureMode; 
 Float deadZoneThreshold; 
 Derivative derivative; 
 DeadZone deadZone; 
 CircularBuffer< VectorFloat > dataBuffer; 
 
 static RegisterFeatureExtractionModule< ZeroCrossingCounter > registerModule;
 
public:
 enum ZeroCrossingFeatureIDs{NUM_ZERO_CROSSINGS_COUNTED=0,ZERO_CROSSING_MAGNITUDE,TOTAL_NUM_ZERO_CROSSING_FEATURES};
 enum FeatureModes{INDEPENDANT_FEATURE_MODE=0,COMBINED_FEATURE_MODE};
};

GRT_END_NAMESPACE

#endif //GRT_ZERO_CROSSING_COUNTER_HEADER