55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
|
|
* Copyright (C) 2021 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.
|
|
*/
|
|
|
|
#include "ardour/key.h"
|
|
|
|
MusicalKey::~MusicalKey ()
|
|
{
|
|
}
|
|
|
|
void
|
|
MusicalKey::set_root (int r)
|
|
{
|
|
/* force root into lowest octave. Yes, 12 tone for now */
|
|
_root = (r % 12);
|
|
}
|
|
|
|
bool
|
|
MusicalKey::in_key (int note) const
|
|
{
|
|
/* currently 12 tone based */
|
|
|
|
note = note % 12;
|
|
|
|
/* we should speed this us. Probably a bitset */
|
|
|
|
if (note == _root) {
|
|
return true;
|
|
}
|
|
|
|
for (std::vector<float>::const_iterator i = steps.begin(); i != steps.end(); ++i) {
|
|
int ii = (int) ((*i) * 2.0);
|
|
|
|
if (note == _root + ii) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|