libs/ardour/legatize.cc

   1 /*
   2  * Copyright (C) 2014-2015 David Robillard <d@drobilla.net>
   3  * Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "ardour/legatize.h"
  21 #include "ardour/midi_model.h"
  22
  23 namespace ARDOUR {
  24
  25 Legatize::Legatize(bool shrink_only)
  26         : _shrink_only(shrink_only)
  27 {}
  28
  29 Legatize::~Legatize ()
  30 {}
  31
  32 Command*
  33 Legatize::operator()(boost::shared_ptr<ARDOUR::MidiModel> model,
  34                      Temporal::Beats                      position,
  35                      std::vector<Legatize::Notes>&        seqs)
  36 {
  37         MidiModel::NoteDiffCommand* cmd = new MidiModel::NoteDiffCommand(model, name ());
  38
  39         for (std::vector<Legatize::Notes>::iterator s = seqs.begin(); s != seqs.end(); ++s) {
  40                 for (Legatize::Notes::iterator i = (*s).begin(); i != (*s).end();) {
  41                         Legatize::Notes::iterator next = i;
  42                         if (++next == (*s).end()) {
  43                                 break;
  44                         }
  45
  46                         const Temporal::Beats new_end = (*next)->time() - Temporal::Beats::tick();
  47                         if ((*i)->end_time() > new_end ||
  48                             (!_shrink_only && (*i)->end_time() < new_end)) {
  49                                 const Temporal::Beats new_length(new_end - (*i)->time());
  50                                 cmd->change((*i), MidiModel::NoteDiffCommand::Length, new_length);
  51                         }
  52
  53                         i = next;
  54                 }
  55         }
  56
  57         return cmd;
  58 }
  59
  60 }  // namespace ARDOUR