1 /*
2  * Copyright (C) 2008-2011 Paul Davis <paul@linuxaudiosystems.com>
3  * Copyright (C) 2009 David Robillard <d@drobilla.net>
4  * Copyright (C) 2016 Robin Gareus <robin@gareus.org>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #ifndef __ardour_fft_graph_h
22 #define __ardour_fft_graph_h
23 
24 #include "ardour/types.h"
25 #include <fftw3.h>
26 
27 #include <gtkmm/drawingarea.h>
28 #include <gtkmm/treemodel.h>
29 #include <gdkmm/color.h>
30 
31 #include <glibmm/refptr.h>
32 
33 #include <string>
34 
35 #include "fft_result.h"
36 
37 class AnalysisWindow;
38 
39 class FFTGraph : public Gtk::DrawingArea
40 {
41 public:
42 
43 	FFTGraph (int windowSize);
44 	~FFTGraph ();
45 
46 	void set_analysis_window (AnalysisWindow *a_window);
47 
windowSize()48 	int windowSize () const { return _windowSize; }
49 	void setWindowSize (int windowSize);
50 
51 	void redraw ();
52 	bool on_expose_event (GdkEventExpose* event);
53 	bool on_motion_notify_event (GdkEventMotion*);
54 	bool on_leave_notify_event (GdkEventCrossing*);
on_button_press_event(GdkEventButton *)55 	bool on_button_press_event (GdkEventButton*) { return true; }
56 
57 	void on_size_request (Gtk::Requisition* requisition);
58 	void on_size_allocate (Gtk::Allocation & alloc);
59 	FFTResult *prepareResult (Gdk::Color color, std::string trackname);
60 
set_show_minmax(bool v)61 	void set_show_minmax      (bool v) { _show_minmax       = v; redraw (); }
set_show_normalized(bool v)62 	void set_show_normalized  (bool v) { _show_normalized   = v; redraw (); }
set_show_proportioanl(bool v)63 	void set_show_proportioanl(bool v) { _show_proportional = v; redraw (); }
64 
65 private:
66 
67 	void update_size ();
68 
69 	void setWindowSize_internal (int windowSize);
70 
71 	int draw_scales (cairo_t*);
72 
73 	static const int minScaleWidth = 512;
74 	static const int minScaleHeight = 420;
75 
76 	static const int hl_margin = 40; // this should scale with font (dBFS labels)
77 	static const int hr_margin = 12;
78 	static const int v_margin  = 12;
79 
80 	int currentScaleWidth;
81 
82 	int width;
83 	int height;
84 
85 	int _yoff;
86 	int _ann_x;
87 	int _ann_y;
88 	cairo_rectangle_t _ann_area;
89 
90 	unsigned int _windowSize;
91 	unsigned int _dataSize;
92 
93 	Glib::RefPtr<Pango::Layout> layout;
94 	cairo_surface_t* _surface;
95 
96 	AnalysisWindow *_a_window;
97 
98 	fftwf_plan _plan;
99 
100 	float* _out;
101 	float* _in;
102 	float* _hanning;
103 	int*   _logScale;
104 
105 	bool _show_minmax;
106 	bool _show_normalized;
107 	bool _show_proportional;
108 
109 	float _fft_start;
110 	float _fft_end;
111 	float _fft_log_base;
112 
113 	friend class FFTResult;
114 };
115 
116 #endif /* __ardour_fft_graph_h */
117