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Analyzer.h
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Analyzer.h
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/**
* @file Analyzer.h
* @author Sebastian Ritterbusch <ospac@ritterbusch.de>
* @version 1.0
* @date 15.3.2016
* @copyright MIT License (see LICENSE file)
* @brief Frequency band activity analysis
*/
#ifndef ANALYZER_H_
#define ANALYZER_H_
#include "Channel.h"
/**
* @brief Frequency band activity analysis
*/
class Analyzer
{
private:
static float sqr(const float & a) { return a*a; }
public:
/**
* Analysis of frequency band distribution if activity is detected
* @param c audio channel to work on
* @param frequencies n cut-off frequencies
* @return resulting l2 normalized n+1 l2 energy levels
*/
static std::vector<double> bandedAnalysis(const Channel & c,
std::vector<float> frequencies);
/**
* Analysis of frequency band distribution if activity is detected
* for fixed cut-off frequencies 100Hz, 500Hz, 2.5k, 4k
* @param c audio channel to work on
* @return resulting l2 normalized n+1 l2 energy levels
*/
static std::vector<double> bandedAnalysis(const Channel & c);
};
#endif /* ANALYZER_H_ */