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livetrax/gtk2_ardour/fft_result.h

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/*
* Copyright (C) 2009-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2016 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __ardour_fft_result_h
#define __ardour_fft_result_h
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#include <math.h>
#include <fftw3.h>
#include <gdkmm/color.h>
#include <string>
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#include <vector>
class FFTGraph;
class FFTResult
{
public:
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~FFTResult () = default;
void analyzeWindow (float *window);
void finalize ();
unsigned int length () const { return _dataSize; }
float avgAt (unsigned int x, bool p) const
{ return p ? _data_prop_avg[x] : _data_flat_avg[x]; }
float maxAt (unsigned int x, bool p) const
{ return p ? _data_prop_max[x] : _data_flat_max[x]; }
float minAt (unsigned int x, bool p) const
{ return p ? _data_prop_min[x] : _data_flat_min[x]; }
float minimum (bool p) const
{ return p ? _min_prop : _min_flat; }
float maximum (bool p) const
{ return p ? _max_prop : _max_flat; }
const Gdk::Color& get_color () const { return _color; }
private:
FFTResult (FFTGraph *graph, Gdk::Color color, std::string trackname);
friend class FFTGraph;
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FFTGraph *_graph;
unsigned int _windowSize;
unsigned int _dataSize;
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int _averages;
float _min_flat;
float _max_flat;
float _min_prop;
float _max_prop;
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std::vector<float> _data_flat_avg;
std::vector<float> _data_flat_max;
std::vector<float> _data_flat_min;
std::vector<float> _data_prop_avg;
std::vector<float> _data_prop_max;
std::vector<float> _data_prop_min;
Gdk::Color _color;
std::string _trackname;
static float power_to_db (float v) { return v > 1e-20 ? 10.0f * log10f (v) : -200.0f; }
};
#endif /* __ardour_fft_result_h */