note_player.cc

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/*
    Copyright (C) 2011 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, 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 ((*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 ((*n)->off_event().size(), (*n)->off_event().buffer());
        }
}