libs/surfaces/push2/level_meter.h

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/*
 * Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2019 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_push2_level_meter_h__
#define __ardour_push2_level_meter_h__
 
#include "canvas/container.h"
#include "canvas/meter.h"
 
#include "ardour/chan_count.h"
#include "ardour/types.h"
 
namespace ARDOUR {
        class PeakMeter;
}
 
namespace ArdourCanvas {
        class Box;
}
 
namespace ArdourSurface
{
 
class Push2;
 
class LevelMeter : public ArdourCanvas::Container, public sigc::trackable
{
  public:
        LevelMeter (Push2& p2, Item* parent, int len, ArdourCanvas::Meter::Orientation o = ArdourCanvas::Meter::Vertical);
        virtual ~LevelMeter ();
 
        virtual void set_meter (ARDOUR::PeakMeter* meter);
 
        void update_gain_sensitive ();
 
        float update_meters ();
        void update_meters_falloff ();
        void clear_meters (bool reset_highlight = true);
        void hide_meters ();
        void setup_meters (int len=0, int width=3, int thin=2);
        void set_max_audio_meter_count (uint32_t cnt = 0);
 
 
  private:
        Push2&                           _p2;
        ARDOUR::PeakMeter*               _meter;
        ArdourCanvas::Meter::Orientation _meter_orientation;
        ArdourCanvas::Box*               _meter_packer;
 
        struct MeterInfo {
                ArdourCanvas::Meter* meter;
                gint16               width;
                int                  length;
                bool                 packed;
                float                max_peak;
 
                MeterInfo() {
                        meter = 0;
                        width = 0;
                        length = 0;
                        packed = false;
                        max_peak = -INFINITY;
                }
        };
 
        guint16                _regular_meter_width;
        int                    _meter_length;
        guint16                _thin_meter_width;
        std::vector<MeterInfo> _meters;
        float                  _max_peak;
        ARDOUR::MeterType      _visible_meter_type;
        uint32_t               _midi_count;
        uint32_t               _meter_count;
        uint32_t               _max_visible_meters;
 
        PBD::ScopedConnection _configuration_connection;
        PBD::ScopedConnection _meter_type_connection;
        PBD::ScopedConnection _parameter_connection;
 
        void hide_all_meters ();
 
        void parameter_changed (std::string);
        void configuration_changed (ARDOUR::ChanCount in, ARDOUR::ChanCount out);
        void meter_type_changed (ARDOUR::MeterType);
};
 
}
 
#endif /* __ardour_push2_level_meter_h__ */