livetrax/gtk2_ardour/plugin_eq_gui.h

/*
    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 "ardour/buffer_set.h"
#include "ardour/plugin_insert.h"
#include "ardour/plugin.h"

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

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