livetrax/gtk2_ardour/note_player.cc

/*
 * Copyright (C) 2010-2012 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2011-2012 David Robillard <d@drobilla.net>
 *
 * 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.
 */

#include <sigc++/bind.h>
#include <glibmm/main.h>

#include "ardour/midi_track.h"

#include "note_player.h"

using namespace ARDOUR;
using namespace std;

NotePlayer::NotePlayer (std::shared_ptr<MidiTrack> mt)
	: track (mt)
{
}

NotePlayer::~NotePlayer ()
{
}

void
NotePlayer::add (std::shared_ptr<NoteType> note)
{
	/* Must not be called once play() has been called */
	notes.push_back (note);
}

void
NotePlayer::on ()
{
	for (Notes::iterator n = notes.begin(); n != notes.end(); ++n) {
		track->write_immediate_event (Evoral::MIDI_EVENT, (*n)->on_event().size(), (*n)->on_event().buffer());
	}
}

void
NotePlayer::play ()
{
	on ();

	/* note: if there is more than 1 note, we will silence them all at the same time */

	const uint32_t note_length_ms = 100;

	Glib::signal_timeout().connect (sigc::bind (sigc::ptr_fun (&NotePlayer::_off), this),
					note_length_ms, G_PRIORITY_DEFAULT);
}

bool
NotePlayer::_off (NotePlayer* np)
{
	np->off ();
	delete np;
	return false;
}

void
NotePlayer::off ()
{
	for (Notes::iterator n = notes.begin(); n != notes.end(); ++n) {
		track->write_immediate_event (Evoral::MIDI_EVENT, (*n)->off_event().size(), (*n)->off_event().buffer());
	}
}