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fft_graph.h

/*
    Copyright (C) 2006 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, 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);
            
            void on_size_request(Gtk::Requisition* requisition);
            void on_size_allocate(Gtk::Allocation & alloc);
            FFTResult *prepareResult(Gdk::Color color, std::string trackname);
            
      private:

            void setWindowSize_internal(int windowSize);

            void draw_scales(Glib::RefPtr<Gdk::Window> window);
            
            static const int scaleWidth = 512;
            static const int scaleHeight = 420;

            static const int h_margin = 20;
            static const int v_margin = 20;

            int width;
            int height;
            
            void analyze(float *window, float *composite);
            int _windowSize;
            int _dataSize;

            Glib::RefPtr<Pango::Layout> layout;
            Glib::RefPtr<Gdk::GC> graph_gc;
            AnalysisWindow *_a_window;

            fftwf_plan _plan;

            float *_out;
            float *_in;
            float *_hanning;
            int *_logScale;

      friend class FFTResult;
};

#endif /* __ardour_fft_graph_h */

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