input_port_monitor.h

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/*
 * Copyright (C) 2021 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 __gtk_ardour_input_port_monitor_h__
#define __gtk_ardour_input_port_monitor_h__
 
#include <gtkmm/box.h>
#include <gtkmm/alignment.h>
 
#include "gtkmm2ext/cairo_widget.h"
 
#include "ardour/circular_buffer.h"
#include "ardour/session_handle.h"
 
namespace ArdourWidgets
{
        class FastMeter;
}
 
class InputPortMonitor : public Gtk::EventBox
{
public:
        enum Orientation {
                Vertical,
                Horizontal
        };
 
        InputPortMonitor (ARDOUR::DataType, ARDOUR::samplecnt_t, Orientation);
        ~InputPortMonitor ();
 
        void clear ();
        void update (float, float);                  // FastMeter
        void update (float const*);                  // EventMeter
        void update (ARDOUR::CircularSampleBuffer&); // InputScope
        void update (ARDOUR::CircularEventBuffer&);  // EventMonitor
 
private:
        class InputScope : public CairoWidget
        {
        public:
                InputScope (ARDOUR::samplecnt_t, int length , int gauge, Orientation);
                void update (ARDOUR::CircularSampleBuffer&);
                void clear ();
                void parameter_changed (std::string const&);
 
        protected:
                void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
                void on_size_request (Gtk::Requisition*);
                void on_size_allocate (Gtk::Allocation&);
 
        private:
                void dpi_reset ();
 
                int                 _pos;
                ARDOUR::samplecnt_t _rate;
                int                 _min_length;
                int                 _min_gauge;
                Orientation         _orientation;
                float               _clip_level;
                bool                _show_clip;
                bool                _logscale;
 
                Cairo::RefPtr<Cairo::ImageSurface> _surface;
        };
 
        class EventMeter : public CairoWidget
        {
        public:
                EventMeter (Orientation);
                void update (float const*);
                void clear ();
 
        protected:
                void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
                void on_size_request (Gtk::Requisition*);
 
        private:
                void dpi_reset ();
 
                Glib::RefPtr<Pango::Layout> _layout;
                float                       _chn[17];
                int                         _length;
                int                         _extent;
                Orientation                 _orientation;
        };
 
        class EventMonitor : public CairoWidget
        {
        public:
                EventMonitor (Orientation);
                void update (ARDOUR::CircularEventBuffer&);
                void clear ();
 
        protected:
                void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*);
                void on_size_request (Gtk::Requisition*);
 
        private:
                void dpi_reset ();
 
                ARDOUR::CircularEventBuffer::EventList _l;
                Glib::RefPtr<Pango::Layout>            _layout;
                int                                    _width;
                int                                    _height;
                Orientation                            _orientation;
        };
 
        void setup_audio_meter ();
        void color_handler ();
        void parameter_changed (std::string const&);
 
        Gtk::Box*                 _box;
        Gtk::Alignment            _bin;
        ARDOUR::DataType          _dt;
        ArdourWidgets::FastMeter* _audio_meter;
        InputScope*               _audio_scope;
        EventMeter*               _midi_meter;
        EventMonitor*             _midi_monitor;
        Orientation               _orientation;
};
 
#endif