src/calf/analyzer.h

   1 /* Calf Analyzer FFT Library
   2  * Copyright (C) 2007-2013 Krzysztof Foltman, Markus Schmidt,
   3  * Christian Holschuh and others
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this program; if not, write to the
  17  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA  02110-1301  USA
  19  */
  20
  21 #ifndef CALF_ANALYZER_H
  22 #define CALF_ANALYZER_H
  23
  24 #include <assert.h>
  25 #include <limits.h>
  26 #include "biquad.h"
  27 #include "inertia.h"
  28 #include "audio_fx.h"
  29 #include "giface.h"
  30 #include "metadata.h"
  31 #include "loudness.h"
  32 #include <math.h>
  33 #include "plugin_tools.h"
  34 #include "fft.h"
  35
  36 #define MATH_E 2.718281828
  37
  38 namespace calf_plugins {
  39
  40 class analyzer: public frequency_response_line_graph
  41 {
  42 private:
  43     mutable int _accuracy;
  44     mutable int _acc;
  45     mutable int _scale;
  46     mutable int _post;
  47     mutable int _hold;
  48     mutable int _smooth;
  49     mutable int _speed;
  50     mutable int _windowing;
  51     mutable int _view;
  52     mutable int _freeze;
  53     mutable int _mode;
  54     mutable float _resolution;
  55     mutable float _offset;
  56     mutable bool _falling;
  57     mutable int _draw_upper;
  58
  59
  60 public:
  61     uint32_t srate;
  62     analyzer();
  63     void process(float L, float R);
  64     void set_sample_rate(uint32_t sr);
  65     bool set_mode(int mode);
  66     void invalidate();
  67     void set_params(float resolution, float offset, int accuracy, int hold, int smoothing, int mode, int scale, int post, int speed, int windowing, int view, int freeze);
  68     ~analyzer();
  69     bool do_fft(int subindex, int points) const;
  70     void draw(int subindex, float *data, int points, bool fftdone) const;
  71     bool get_graph(int subindex, int phase, float *data, int points, cairo_iface *context, int *mode) const;
  72     bool get_moving(int subindex, int &direction, float *data, int x, int y, int &offset, uint32_t &color) const;
  73     bool get_gridline(int subindex, int phase, float &pos, bool &vertical, std::string &legend, cairo_iface *context) const;
  74     bool get_layers(int generation, unsigned int &layers) const;
  75 protected:
  76     int fft_buffer_size;
  77     float *fft_buffer;
  78     int *spline_buffer;
  79     int fpos;
  80     mutable bool sanitize, recreate_plan;
  81     static const int MAX_FFT_ORDER = 15;
  82     dsp::fft<float, MAX_FFT_ORDER> fft;
  83     mutable dsp::fft<float, MAX_FFT_ORDER>::complex fft_temp[1 << MAX_FFT_ORDER];
  84     static const int max_fft_cache_size = 32768;
  85     static const int max_fft_buffer_size = max_fft_cache_size * 2;
  86     float *fft_inL, *fft_outL;
  87     float *fft_inR, *fft_outR;
  88     float *fft_smoothL, *fft_smoothR;
  89     float *fft_deltaL, *fft_deltaR;
  90     float *fft_holdL, *fft_holdR;
  91     float *fft_freezeL, *fft_freezeR;
  92     mutable int lintrans;
  93     mutable int analyzer_phase_drawn;
  94 };
  95
  96 };
  97 #endif