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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* jackmidi.cc
*
* Mo 25. Jan 11:26:06 CET 2016
* Copyright 2016 Christian Glöckner
* cgloeckner@freenet.de
****************************************************************************/
/*
* 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 <iostream>
#include <cassert>
#include "cpp11fix.h" // required for c++11
#include "jackmidi.h"
JackMidiInputEngine::JackMidiInputEngine(JackClient& client)
: AudioInputEngineMidi{}
, JackProcess{}
, client(client)
, port{nullptr}
, pos{0u}
, events{}
{
client.add(*this);
}
JackMidiInputEngine::~JackMidiInputEngine()
{
client.remove(*this);
}
bool JackMidiInputEngine::init(const Instruments& instruments)
{
if(!loadMidiMap(midimap_file, instruments))
{
std::cerr << "[MidifileInputEngine] Failed to parse midimap '"
<< midimap_file << "'\n";
return false;
}
port = std::make_unique<JackPort>(client, "drumgizmo_midiin",
JACK_DEFAULT_MIDI_TYPE,
JackPortIsInput);
return true;
}
void JackMidiInputEngine::setParm(const std::string& parm, const std::string& value)
{
if(parm == "midimap")
{
// apply midimap filename
midimap_file = value;
}
else
{
std::cerr << "[JackMidiInputEngine] Unsupported parameter '" << parm
<< "'\n";
}
}
bool JackMidiInputEngine::start()
{
client.activate();
return true;
}
void JackMidiInputEngine::stop()
{
}
void JackMidiInputEngine::pre()
{
}
void JackMidiInputEngine::run(size_t pos, size_t len,
std::vector<event_t>& events)
{
assert(events.empty());
std::swap(events, this->events);
}
void JackMidiInputEngine::post()
{
}
bool JackMidiInputEngine::isFreewheeling() const
{
return client.isFreewheeling();
}
void JackMidiInputEngine::process(jack_nframes_t num_frames)
{
assert(port != nullptr);
void* buffer = jack_port_get_buffer(port->port, num_frames);
jack_nframes_t num_events = jack_midi_get_event_count(buffer);
// The event list is assumed to be empty here.
// It might not be though in case the system is under heavy load.
// Make room for both the new and old events to make sure we don't throw
// anything away.
events.reserve(events.size() + num_events);
for(jack_nframes_t i = 0; i < num_events; ++i)
{
jack_midi_event_t event;
jack_midi_event_get(&event, buffer, i);
processNote(event.buffer, event.size, event.time, events);
}
// Disable clear buffer on input port because for Edrumulus usage we need that
// two clients use the some output buffer and if we clear it here, the other
// application will not get any MIDI input signal. Usually, the output port
// is responsible for clearing the buffer, not the input port.
//jack_midi_clear_buffer(buffer);
pos += num_frames;
}
|
