1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
Copyright (C) 2015 Paul Davis
Author: David Robillard
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 "evoral/EventList.hpp"
#include "ardour/beats_frames_converter.h"
#include "ardour/midi_state_tracker.h"
#include "ardour/note_fixer.h"
#include "ardour/tempo.h"
namespace ARDOUR {
NoteFixer::~NoteFixer()
{
clear();
}
void
NoteFixer::clear()
{
for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
delete *i;
}
}
void
NoteFixer::prepare(TempoMap& tempo_map,
const MidiModel::NoteDiffCommand* cmd,
const framepos_t origin,
const framepos_t pos,
std::set< boost::weak_ptr<Note> >& active_notes)
{
typedef MidiModel::NoteDiffCommand Command;
BeatsFramesConverter converter(tempo_map, origin);
for (Command::NoteList::const_iterator i = cmd->removed_notes().begin();
i != cmd->removed_notes().end(); ++i) {
if (note_is_active(converter, *i, pos)) {
/* Deleted note spans the end of the latest read, so we will never
read its off event. Emit a note off to prevent a stuck note. */
_events.push_back(copy_event(pos, (*i)->off_event()));
active_notes.erase(*i);
}
}
for (Command::NoteList::const_iterator i = cmd->added_notes().begin();
i != cmd->added_notes().end(); ++i) {
if (note_is_active(converter, *i, pos)) {
/* Added note spans the end of the latest read, so we missed its on
event. Emit note on immediately to make the state consistent. */
_events.push_back(copy_event(pos, (*i)->on_event()));
active_notes.insert(*i);
}
}
for (Command::ChangeList::const_iterator i = cmd->changes().begin();
i != cmd->changes().end(); ++i) {
if (!note_is_active(converter, i->note, pos)) {
/* Note is not currently active, no compensation needed. */
continue;
}
/* Changed note spans the end of the latest read. */
if (i->property == Command::NoteNumber) {
/* Note number has changed, end the old note. */
_events.push_back(copy_event(pos, i->note->off_event()));
/* Start a new note on the new note number. The same note object
is active, so we leave active_notes alone. */
Event* on = copy_event(pos, i->note->on_event());
on->buffer()[1] = (uint8_t)i->new_value.get_int();
_events.push_back(on);
} else if (i->property == Command::StartTime &&
converter.to(i->new_value.get_beats()) >= pos) {
/* Start time has moved from before to after the end of the
latest read, end the old note. */
_events.push_back(copy_event(pos, i->note->off_event()));
active_notes.erase(i->note);
} else if (i->property == Command::Length &&
converter.to(i->note->time() + i->new_value.get_beats()) < pos) {
/* Length has shortened to before the end of the latest read,
end the note. */
_events.push_back(copy_event(pos, i->note->off_event()));
active_notes.erase(i->note);
} else if (i->property == Command::Channel) {
/* Channel has changed, end the old note. */
_events.push_back(copy_event(pos, i->note->off_event()));
/* Start a new note on the new channel. See number change above. */
Event* on = copy_event(pos, i->note->on_event());
on->buffer()[0] &= 0xF0;
on->buffer()[0] |= (uint8_t)i->new_value.get_int();
_events.push_back(on);
}
}
}
void
NoteFixer::emit(Evoral::EventSink<framepos_t>& dst,
framepos_t pos,
MidiStateTracker& tracker)
{
for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
dst.write(pos, (*i)->event_type(), (*i)->size(), (*i)->buffer());
tracker.track(**i);
delete *i;
}
_events.clear();
}
NoteFixer::Event*
NoteFixer::copy_event(framepos_t time, const Evoral::Event<Evoral::Beats>& ev)
{
return new Event(ev.event_type(), time, ev.size(), ev.buffer());
}
bool
NoteFixer::note_is_active(const BeatsFramesConverter& converter,
boost::shared_ptr<Note> note,
framepos_t pos)
{
const framepos_t start_time = converter.to(note->time());
const framepos_t end_time = converter.to(note->end_time());
return (start_time < pos && end_time >= pos);
}
} // namespace ARDOUR
|
