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
|
/*
Copyright (C) 2006 Paul Davis
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 <cassert>
#include <ardour/midi_port.h>
#include <ardour/data_type.h>
#include <iostream>
using namespace ARDOUR;
using namespace std;
MidiPort::MidiPort(jack_port_t* p)
: Port(p)
, _buffer(NULL)
, _nframes_this_cycle(0)
{
DataType dt(_type);
assert(dt == DataType::MIDI);
reset();
_buffer = new MidiBuffer(4096); // FIXME FIXME FIXME
}
MidiPort::~MidiPort()
{
delete _buffer;
}
void
MidiPort::cycle_start (jack_nframes_t nframes)
{
_nframes_this_cycle = nframes;
if (_flags & JackPortIsOutput) {
_buffer->set_size(0);
return;
}
// We're an input - copy Jack events to internal buffer
void* jack_buffer = jack_port_get_buffer(_port, nframes);
const jack_nframes_t event_count
= jack_midi_port_get_info(jack_buffer, nframes)->event_count;
assert(event_count < _buffer->capacity());
for (jack_nframes_t i=0; i < event_count; ++i) {
jack_midi_event_t* const ev = &_buffer->data()[i];
jack_midi_event_get(ev, jack_buffer, i, nframes);
// Convert note ons with velocity 0 to proper note offs
// FIXME: Jack MIDI should guarantee this - does it?
//if (ev->buffer[0] == MIDI_CMD_NOTE_ON && ev->buffer[2] == 0)
// ev->buffer[0] = MIDI_CMD_NOTE_OFF;
}
_buffer->set_size(event_count);
//if (_buffer->size() > 0)
// cerr << "MIDIPort got " << event_count << " events." << endl;
}
void
MidiPort::cycle_end()
{
if (_flags & JackPortIsInput) {
_nframes_this_cycle = 0; // catch any oopses
return;
}
// We're an output - copy events from internal buffer to Jack buffer
void* jack_buffer = jack_port_get_buffer(_port, _nframes_this_cycle);
const jack_nframes_t event_count = _buffer->size();
jack_midi_clear_buffer(jack_buffer, _nframes_this_cycle);
for (jack_nframes_t i=0; i < event_count; ++i) {
const jack_midi_event_t& ev = _buffer->data()[i];
jack_midi_event_write(jack_buffer, ev.time, ev.buffer, ev.size, _nframes_this_cycle);
}
_nframes_this_cycle = 0; // catch oopses
}
|
