midi_cursor.h

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/*
 * Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.
 */
 
#pragma once
 
#include <set>
 
 
 
#include "pbd/signals.h"
 
#include "temporal/beats.h"
#include "evoral/Sequence.h"
 
#include "ardour/types.h"
 
namespace ARDOUR {
 
struct MidiCursor {
        MidiCursor()  {}
        MidiCursor(const MidiCursor&) = delete;
        MidiCursor& operator=(const MidiCursor&) = delete;
 
        void connect(PBD::Signal<void(bool)>& invalidated) {
                connections.drop_connections();
                invalidated.connect_same_thread (connections, std::bind(&MidiCursor::invalidate, this, _1));
        }
 
 
        void invalidate(bool preserve_notes) {
                iter.invalidate (preserve_notes);
                /* maintain time domain while resetting to zero */
                last_read_end = Temporal::timepos_t (last_read_end.time_domain());
        }
 
        Evoral::Sequence<Temporal::Beats>::const_iterator        iter;
        Evoral::Sequence<Temporal::Beats>::WeakActiveNotes       active_notes;
        timepos_t                                                last_read_end;
        PBD::ScopedConnectionList                                connections;
};
 
}