2
* Copyright (c) 2006,2007 Dmitry S. Baikov
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
#ifndef __jack_midi_unpack_h__
20
#define __jack_midi_unpack_h__
22
#include <jack/midiport.h>
23
#include <jack/engine.h>
26
MIDI_UNPACK_MAX_MSG = 1024
31
unsigned char data[MIDI_UNPACK_MAX_MSG];
35
void midi_unpack_init(midi_unpack_t *u)
38
u->size = sizeof(u->data);
43
void midi_unpack_reset(midi_unpack_t *u)
49
static const unsigned char midi_voice_len[] = {
52
3, /*0xA0 Aftertouch*/
53
3, /*0xB0 Control Change*/
54
2, /*0xC0 Program Change*/
55
2, /*0xD0 Channel Pressure*/
56
3, /*0xE0 Pitch Wheel*/
60
static const unsigned char midi_system_len[] = {
61
0, /*0xF0 System Exclusive Start*/
62
2, /*0xF1 MTC Quarter Frame*/
63
3, /*0xF2 Song Postion*/
64
2, /*0xF3 Song Select*/
67
1, /*0xF6 Tune Request*/
68
1 /*0xF7 System Exlusive End*/
72
int midi_unpack_buf(midi_unpack_t *buf, const unsigned char *data, int len, void *jack_port_buf, jack_nframes_t time)
77
const unsigned char byte = data[i];
78
if (byte >= 0xF8) // system realtime
80
jack_midi_event_write(jack_port_buf, time, &data[i], 1);
81
//jack_error("midi_unpack: written system relatime event\n");
82
//midi_input_write(in, &data[i], 1);
84
else if (byte < 0x80) // data
86
assert (buf->pos < buf->size);
87
buf->data[buf->pos++] = byte;
89
else if (byte < 0xF0) // voice
91
assert (byte >= 0x80 && byte < 0xF0);
92
//buf->need = ((byte|0x0F) == 0xCF || (byte|0x0F)==0xDF) ? 2 : 3;
93
buf->need = midi_voice_len[(byte-0x80)>>4];
97
else if (byte == 0xF7) // sysex end
99
assert (buf->pos < buf->size);
100
buf->data[buf->pos++] = byte;
101
buf->need = buf->pos;
105
assert (byte >= 0xF0 && byte < 0xF8);
108
buf->need = midi_system_len[byte - 0xF0];
110
buf->need = buf->size;
112
if (buf->pos == buf->need)
114
// TODO: deal with big sysex'es (they are silently dropped for now)
115
if (buf->data[0] >= 0x80 || (buf->data[0]==0xF0 && buf->data[buf->pos-1] == 0xF7)) {
116
/* convert Note On with velocity 0 to Note Off */
117
if ((buf->data[0] & 0xF0) == 0x90 && buf->data[2] == 0) {
118
// we use temp array here to keep running status in sync
119
jack_midi_data_t temp[3] = { 0x80, 0, 0x40 };
120
temp[0] |= buf->data[0] & 0x0F;
121
temp[1] = buf->data[1];
122
jack_midi_event_write(jack_port_buf, time, temp, 3);
124
jack_midi_event_write(jack_port_buf, time, &buf->data[0], buf->pos);
125
//jack_error("midi_unpack: written %d-byte event\n", buf->pos);
126
//midi_input_write(in, &buf->data[0], buf->pos);
128
/* keep running status */
129
if (buf->data[0] >= 0x80 && buf->data[0] < 0xF0)
134
buf->need = buf->size;
142
#endif /* __jack_midi_unpack_h__ */