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livetrax/gtk2_ardour/note_player.cc

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/*
* 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 (boost::shared_ptr<MidiTrack> mt)
: track (mt)
{
}
NotePlayer::~NotePlayer ()
{
clear ();
}
void
NotePlayer::add (boost::shared_ptr<NoteType> note)
{
notes.push_back (note);
}
void
NotePlayer::clear ()
{
off ();
notes.clear ();
}
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());
}
}