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
146
147
148
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audioinputenginemidi.cc
*
* Mon Apr 1 20:13:25 CEST 2013
* Copyright 2013 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "audioinputenginemidi.h"
#include "midimapparser.h"
#include "drumgizmo.h"
#include <hugin.hpp>
AudioInputEngineMidi::AudioInputEngineMidi()
: refs(REFSFILE)
{
is_valid = false;
}
bool AudioInputEngineMidi::loadMidiMap(const std::string& file,
const Instruments& instruments)
{
std::string f = file;
if(refs.load())
{
if(file.size() > 1 && file[0] == '@')
{
f = refs.getValue(file.substr(1));
}
}
else
{
ERR(drumkitparser, "Error reading refs.conf");
}
midimap = "";
is_valid = false;
DEBUG(mmap, "loadMidiMap(%s, i.size() == %d)\n", f.c_str(),
(int)instruments.size());
if(f == "")
{
return false;
}
MidiMapParser midimap_parser;
if(!midimap_parser.parseFile(f))
{
return false;
}
instrmap_t instrmap;
for(size_t i = 0; i < instruments.size(); i++)
{
instrmap[instruments[i]->getName()] = i;
}
mmap.swap(instrmap, midimap_parser.midimap);
midimap = file;
is_valid = true;
return true;
}
std::string AudioInputEngineMidi::getMidimapFile() const
{
return midimap;
}
bool AudioInputEngineMidi::isValid() const
{
return is_valid;
}
// Note types:
static const std::uint8_t NoteOff = 0x80;
static const std::uint8_t NoteOn = 0x90;
static const std::uint8_t NoteAftertouch = 0xA0;
// Note type mask:
static int const NoteMask = 0xF0;
void AudioInputEngineMidi::processNote(const std::uint8_t* midi_buffer,
std::size_t midi_buffer_length,
std::size_t offset,
std::vector<event_t>& events)
{
if(midi_buffer_length < 3)
{
return;
}
auto key = midi_buffer[1];
auto velocity = midi_buffer[2];
auto instrument_idx = mmap.lookup(key);
switch(midi_buffer[0] & NoteMask)
{
case NoteOff:
// Ignore for now
break;
case NoteOn:
if(instrument_idx != -1)
{
// maps velocities to [.5/127, 126.5/127]
auto centered_velocity = (velocity-.5f)/127.0f;
events.push_back({EventType::OnSet, (std::size_t)instrument_idx,
offset, centered_velocity});
}
break;
case NoteAftertouch:
if(velocity == 0 && instrument_idx != -1)
{
events.push_back({EventType::Choke, (std::size_t)instrument_idx,
offset, .0f});
}
break;
default:
break;
}
}
|
