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/*
* SpectralCentroidprint -- Audio fingerprinting toolkit
* Copyright (C) 2010 Lukas Lalinsky <lalinsky@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#ifndef CHROMAPRINT_SPECTRAL_CENTROID_H_
#define CHROMAPRINT_SPECTRAL_CENTROID_H_
#include <math.h>
#include <vector>
#include "utils.h"
#include "fft_frame_consumer.h"
#include "feature_vector_consumer.h"
namespace Chromaprint
{
class SpectralCentroid : public FFTFrameConsumer
{
public:
SpectralCentroid(int num_bands, int min_freq, int max_freq, int frame_size, int sample_rate, FeatureVectorConsumer *consumer);
~SpectralCentroid();
void Reset();
void Consume(const FFTFrame &frame);
protected:
int NumBands() const { return m_bands.size() - 1; }
int FirstIndex(int band) const { return m_bands[band]; }
int LastIndex(int band) const { return m_bands[band + 1]; }
private:
CHROMAPRINT_DISABLE_COPY(SpectralCentroid);
void PrepareBands(int num_bands, int min_freq, int max_freq, int frame_size, int sample_rate);
std::vector<int> m_bands;
std::vector<double> m_features;
FeatureVectorConsumer *m_consumer;
};
};
#endif
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