plugin_eq_gui.h

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/*
    Copyright (C) 2008 Paul Davis
    Author: Sampo Savolainen

    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_plugin_eq_gui_h
#define __ardour_plugin_eq_gui_h

#include "pbd/signals.h"

#include "ardour/buffer_set.h"

#include <gtkmm/table.h>
#include <gtkmm/drawingarea.h>
#include <gtkmm/combobox.h>
#include <gtkmm/liststore.h>

namespace ARDOUR {
        class Plugin;
        class PluginInsert;
}

namespace GTKArdour {
        class FFT;
}

class PluginEqGui : public Gtk::Table
{
public:
        PluginEqGui (boost::shared_ptr<ARDOUR::PluginInsert>);
        ~PluginEqGui ();

        void start_listening ();
        void stop_listening ();

private:
        // Setup
        void set_buffer_size (uint32_t, uint32_t);
        void change_dB_scale ();

        // Analysis
        void run_impulse_analysis ();
        void signal_collect_callback (ARDOUR::BufferSet *, ARDOUR::BufferSet *);
        float _signal_analysis_running;

        // Drawing
        virtual void on_hide ();
        virtual void on_show ();

        void stop_updating ();
        void start_updating ();

        void resize_analysis_area (Gtk::Allocation&);
        void redraw_analysis_area ();

        void draw_analysis_scales (cairo_t *);
        bool expose_analysis_area (GdkEventExpose *);

        void draw_scales_power (Gtk::Widget *, cairo_t *);
        void plot_impulse_amplitude (Gtk::Widget *,cairo_t *);

        void draw_scales_phase (Gtk::Widget *,cairo_t *);
        void plot_impulse_phase (Gtk::Widget *,cairo_t *);

        void plot_signal_amplitude_difference (Gtk::Widget *,cairo_t *);

        // Helpers
        bool timeout_callback ();
        void redraw_scales ();

        // Fields:

        // analysis parameters
        float _samplerate;

        float _min_dB;
        float _max_dB;
        float _step_dB;

        float _log_coeff;
        float _log_max;

        ARDOUR::framecnt_t _buffer_size;
        ARDOUR::framecnt_t _signal_buffer_size;

        // buffers
        ARDOUR::BufferSet _bufferset;
        ARDOUR::BufferSet _collect_bufferset;


        // dimensions
        float _analysis_width;
        float _analysis_height;

        // My objects
        GTKArdour::FFT *_impulse_fft;
        GTKArdour::FFT *_signal_input_fft;
        GTKArdour::FFT *_signal_output_fft;
        boost::shared_ptr<ARDOUR::Plugin> _plugin;
        boost::shared_ptr<ARDOUR::PluginInsert> _plugin_insert;

        // gui objects
        Gtk::DrawingArea *_analysis_area;
        cairo_surface_t *_analysis_scale_surface;

        // dB scale selection:
        class dBSelectionColumns : public Gtk::TreeModel::ColumnRecord
        {
        public:
                dBSelectionColumns()
                { add(dBMin); add(dBMax); add(dBStep); add(name); }

                Gtk::TreeModelColumn<float> dBMin;
                Gtk::TreeModelColumn<float> dBMax;
                Gtk::TreeModelColumn<float> dBStep;
                Gtk::TreeModelColumn<std::string> name;
        };

        dBSelectionColumns dBColumns;

        Gtk::ComboBox *dBScaleCombo;
        Glib::RefPtr<Gtk::ListStore> dBScaleModel;

        Gtk::CheckButton *_phase_button;

        // signals and connections
        sigc::connection _update_connection;
        sigc::connection _window_unmap_connection;
        sigc::connection _window_map_connection;

        PBD::ScopedConnection analysis_connection;
};

#endif