2 Copyright (C) 2004 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "pbd/basename.h"
23 #include "ardour/quantize.h"
24 #include "ardour/midi_model.h"
30 using namespace ARDOUR;
34 * grid parameters are the quantize value in beats, ie 1.0 = quantize to beats,
35 * 0.25 = quantize to beats/4, etc.
38 Quantize::Quantize (Session& s, bool snap_start, bool snap_end,
39 double start_grid, double end_grid,
40 float strength, float swing, float threshold)
42 , _snap_start (snap_start)
43 , _snap_end (snap_end)
44 , _start_grid(start_grid)
46 , _strength (strength/100.0)
47 , _swing (swing/100.0)
48 , _threshold (threshold)
52 Quantize::~Quantize ()
57 Quantize::operator () (boost::shared_ptr<MidiModel> model,
59 std::vector<Evoral::Sequence<Evoral::MusicalTime>::Notes>& seqs)
61 /* Calculate offset from start of model to next closest quantize step,
62 to quantize relative to actual session beats (etc.) rather than from the
65 const double round_pos = round(position / _start_grid) * _start_grid;
66 const double offset = round_pos - position;
69 MidiModel::NoteDiffCommand* cmd = new MidiModel::NoteDiffCommand (model, "quantize");
71 for (std::vector<Evoral::Sequence<Evoral::MusicalTime>::Notes>::iterator s = seqs.begin(); s != seqs.end(); ++s) {
75 /* TODO 'swing' probably requires a 2nd iteration:
76 * first quantize notes to the grid, then apply beat shift
78 for (Evoral::Sequence<MidiModel::TimeType>::Notes::iterator i = (*s).begin(); i != (*s).end(); ++i) {
80 double new_start = round (((*i)->time() - offset) / _start_grid) * _start_grid + offset;
81 double new_end = round (((*i)->end_time() - offset) / _end_grid) * _end_grid + offset;
83 if (_swing > 0.0 && !even) {
85 double next_grid = new_start + _start_grid;
87 /* find a spot 2/3 (* swing factor) of the way between the grid point
88 we would put this note at, and the nominal position of the next note.
91 new_start = new_start + (2.0/3.0 * _swing * (next_grid - new_start));
92 new_end = new_end + (2.0/3.0 * _swing * (next_grid - new_start));
94 } else if (_swing < 0.0 && !even) {
96 double prev_grid = new_start - _start_grid;
98 /* find a spot 2/3 (* swing factor) of the way between the grid point
99 we would put this note at, and the nominal position of the previous note.
102 new_start = new_start - (2.0/3.0 * _swing * (new_start - prev_grid));
103 new_end = new_end - (2.0/3.0 * _swing * (new_start - prev_grid));
107 double delta = new_start - (*i)->time();
109 if (fabs (delta) >= _threshold) {
112 cmd->change ((*i), MidiModel::NoteDiffCommand::StartTime,
113 (*i)->time() + delta);
118 delta = new_end - (*i)->end_time();
120 if (fabs (delta) >= _threshold) {
121 double new_dur = new_end - new_start;
123 if (new_dur == 0.0) {
127 cmd->change ((*i), MidiModel::NoteDiffCommand::Length, new_dur);