fft_graph.h

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/*
 * Copyright (C) 2008-2011 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009 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_graph_h
#define __ardour_fft_graph_h
 
#include "ardour/types.h"
#include <fftw3.h>
 
#include <gtkmm/drawingarea.h>
#include <gtkmm/treemodel.h>
#include <gdkmm/color.h>
 
#include <glibmm/refptr.h>
 
#include <string>
 
#include "fft_result.h"
 
class AnalysisWindow;
 
class FFTGraph : public Gtk::DrawingArea
{
public:
 
        FFTGraph (int windowSize);
        ~FFTGraph ();
 
        void set_analysis_window (AnalysisWindow *a_window);
 
        int windowSize () const { return _windowSize; }
        void setWindowSize (int windowSize);
 
        void redraw ();
        bool on_expose_event (GdkEventExpose* event);
        bool on_motion_notify_event (GdkEventMotion*);
        bool on_leave_notify_event (GdkEventCrossing*);
        bool on_button_press_event (GdkEventButton*) { return true; }
 
        void on_size_request (Gtk::Requisition* requisition);
        void on_size_allocate (Gtk::Allocation & alloc);
        FFTResult *prepareResult (Gdk::Color color, std::string trackname);
 
        void set_show_minmax      (bool v) { _show_minmax       = v; redraw (); }
        void set_show_normalized  (bool v) { _show_normalized   = v; redraw (); }
        void set_show_proportioanl(bool v) { _show_proportional = v; redraw (); }
 
private:
 
        void update_size ();
 
        void setWindowSize_internal (int windowSize);
 
        int draw_scales (cairo_t*);
 
        static const int minScaleWidth = 512;
        static const int minScaleHeight = 420;
 
        static const int hl_margin = 40; // this should scale with font (dBFS labels)
        static const int hr_margin = 12;
        static const int v_margin  = 12;
 
        int currentScaleWidth;
 
        int width;
        int height;
 
        int _yoff;
        int _ann_x;
        int _ann_y;
        cairo_rectangle_t _ann_area;
 
        unsigned int _windowSize;
        unsigned int _dataSize;
 
        Glib::RefPtr<Pango::Layout> layout;
        cairo_surface_t* _surface;
 
        AnalysisWindow *_a_window;
 
        fftwf_plan _plan;
 
        float* _out;
        float* _in;
        float* _hanning;
        int*   _logScale;
 
        bool _show_minmax;
        bool _show_normalized;
        bool _show_proportional;
 
        float _fft_start;
        float _fft_end;
        float _fft_log_base;
 
        friend class FFTResult;
};
 
#endif /* __ardour_fft_graph_h */