UnsizedSegmentation.hxx

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#ifndef UnsizedSegmentation_hxx
#define UnsizedSegmentation_hxx

#include "Segmentation.hxx"

namespace CLAM
{
        class UnsizedSegmentation : public Segmentation
        {
        public:
                class InsertedOutOfBounds : public std::exception
                {
                        public:
                        const char * what() const throw () { return "Segmentation point inserted out of limits";}
                };
                typedef std::vector<double> TimePositions;
        public:
                UnsizedSegmentation()
                        : Segmentation(0)
                {
                }
                UnsizedSegmentation(double maxPosition)
                        : Segmentation(maxPosition)
                {
                }

                UnsizedSegmentation(double maxPosition, const TData * begin, const TData * end)
                        : Segmentation(maxPosition)
                {
                        takeArray(begin, end);
                }
                void takeArray(const TData * begin, const TData * end)
                {
                        for (const TData * it=begin; it!=end; it++)
                                insert(*it);
                }
                ~UnsizedSegmentation()
                {
                }
                unsigned insert(double timePosition)
                {
                        if (timePosition<0.0) throw InsertedOutOfBounds();
                        if (timePosition>=maxPosition()) throw InsertedOutOfBounds();
                        TimePositions::iterator insertPoint = 
                                std::lower_bound(_offsets.begin(), _offsets.end(), timePosition);
                        if (insertPoint==_offsets.end())
                        {
                                _offsets.push_back(timePosition);
                                _onsets.push_back(timePosition);
                                _selection.push_back(false);
                                return _offsets.size()-1;
                        }
                        unsigned position = insertPoint - _offsets.begin();
                        _offsets.insert(insertPoint, timePosition);
                        _onsets.insert(_onsets.begin()+position, timePosition);
                        _selection.insert(_selection.begin()+position, false);
                        if (position<=_current) _current++;
                        return position;
                }
                void remove(unsigned segment)
                {
                        _offsets.erase(_offsets.begin()+segment);
                        _onsets.erase(_onsets.begin()+segment);
                        _selection.erase(_selection.begin()+segment);
                        if (_current!=0 && segment<=_current) _current--;
                }
                unsigned pickOffset(double timePosition, double tolerance) const
                {
                        return pickPosition(_offsets, timePosition, tolerance);
                }
                unsigned pickOnset(double timePosition, double tolerance) const
                {
                        return pickPosition(_onsets, timePosition, tolerance);
                }
                unsigned pickSegmentBody(double timePosition) const
                {
                        if (timePosition<0) return _offsets.size();
                        TimePositions::const_iterator upperBound =
                                std::lower_bound(_offsets.begin(), _offsets.end(), timePosition);
                        if (upperBound == _offsets.begin()) return 0;
                        if (timePosition - *(upperBound-1) > *upperBound - timePosition) return upperBound - _offsets.begin();
                        return upperBound - _offsets.begin()-1;
                }
                void dragOnset(unsigned segment, double newTimePosition)
                {
                        // The onset is attached to the offset
                        dragOffset(segment, newTimePosition);
                }
                void dragOffset(unsigned segment, double newTimePosition)
                {
                        if (segment==_offsets.size()) return; // Invalid segment

                        // Limit movement on the left to the onset
                        double leftLimit = segment!=0 ?
                                _onsets[segment-1] : 0.0;
                        double rightLimit = segment+1<_offsets.size()? 
                                        _onsets[segment+1] : maxPosition();
                        if (newTimePosition<leftLimit)
                                newTimePosition = leftLimit;
                        // Limit movement on the right to the next offset
                        if (newTimePosition>rightLimit)
                                newTimePosition = rightLimit;

                        // The offset and the onset change together
                        _offsets[segment]=newTimePosition;
                        _onsets[segment]=newTimePosition;
                }
                void fillArray(DataArray& segmentation) const
                {
                        unsigned nSegments = _onsets.size();
                        segmentation.Resize(nSegments);
                        segmentation.SetSize(nSegments);
                        for (unsigned i=0; i<nSegments; i++)
                                segmentation[i]=_onsets[i];
                }
                
                const char * GetClassName() const { return "UnsizedSegmentation"; }

        private:
                unsigned pickPosition(const TimePositions & positions, double timePosition, double tolerance) const
                {
                        TimePositions::const_iterator lowerBound = 
                                std::lower_bound(positions.begin(), positions.end(), timePosition-tolerance);
                        TimePositions::const_iterator upperBound = 
                                std::upper_bound(lowerBound, positions.end(), timePosition+tolerance);

                        if (lowerBound==upperBound) return positions.size(); // None found
        
                        // Pick the closest in range
                        unsigned lowerSegment = lowerBound - positions.begin();
                        unsigned upperSegment = upperBound - positions.begin();
                        double lastDifference = std::fabs(timePosition-positions[lowerSegment]);
                        for (unsigned i=lowerSegment; i<upperSegment; i++)
                        {
                                double newDifference = std::fabs(timePosition-positions[i]);
                                if (newDifference>lastDifference) break;
                                lastDifference = newDifference;
                                lowerSegment = i;
                        }
                        return lowerSegment;
                }
        };

}



#endif//UnsizedSegmentation_hxx