algoutils.h

/* 
 * Copyright (C) 2006-2013  Music Technology Group - Universitat Pompeu Fabra
 *
 * This file is part of Gaia
 * 
 * Gaia is free software: you can redistribute it and/or modify it under 
 * the terms of the GNU Affero General Public License as published by the Free 
 * Software Foundation (FSF), either version 3 of the License, or (at your 
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 
 * details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * version 3 along with this program.  If not, see http://www.gnu.org/licenses/
 */

#ifndef GAIA_ALGOUTILS_H
#define GAIA_ALGOUTILS_H

#include "dataset.h"

namespace gaia2 {


QPair<Point, Point> getRegionMeanVar(const DataSet& dataset,
                                     const Region& region);


QPair<Point, Point> getRegionMinMax(const DataSet& dataset,
                                    const Region& region);


class DescCompare {
  const PointLayout& _layout;
 public:
  DescCompare(const PointLayout& layout) : _layout(layout) {}
  bool operator()(const QString& a, const QString& b) const {
    DescriptorLengthType la = _layout.descriptorLocation(a).lengthType();
    DescriptorLengthType lb = _layout.descriptorLocation(b).lengthType();

    if (la == FixedLength && lb == VariableLength) return true;
    if (la == VariableLength && lb == FixedLength) return false;
    return a < b;
  }
};


QStringList findVariableLengthDescriptors(const DataSet* dataset);

} // namespace gaia2

#endif // GAIA_ALGOUTILS_H