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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
//=========================================================
// MusE
// Linux Music Editor
// $Id: midirawin.cpp,v 1.1.1.1 2003/10/29 10:06:12 wschweer Exp $
// (C) Copyright 1999 Werner Schweer (ws@seh.de)
//=========================================================
#include <stdio.h>
#include <string.h>
#include "midirawin.h"
#include "event.h"
//---------------------------------------------------------
// MidiRawIn
//---------------------------------------------------------
MidiRawIn::MidiRawIn()
{
recState = SYNC;
sysexMsg = 0;
sysexSize = 0;
sysexMaxSize = 0;
}
//---------------------------------------------------------
// processInput
// push data into processor
//---------------------------------------------------------
void MidiRawIn::dataInput(unsigned char* buffer, int n)
{
unsigned char* p = buffer;
for (int i = 0; i < n; ++i) {
unsigned char c = p[i];
//---------------------------------------------
// filter Real Time Messages
//---------------------------------------------
if ((c & 0xf8) == 0xf8) {
realtimeSystemInput(c);
continue;
}
switch (recState) {
case MTCQ:
mtcInputQuarter(c);
recState = SYNC;
break;
case SONGPTR1:
recData1 = c & 0x7f;
recState = SONGPTR2;
break;
case SONGPTR2:
recState = SYNC;
setSongPosition(((c & 0x7f) << 7) | recData1);
break;
case SONGSELECT: // ignore song select
recState = SYNC;
break;
case SYSEX:
if (c == 0xf7) {
recState = SYNC;
sysexReceived(sysexMsg, sysexSize);
sysexSize = 0;
break;
}
if (c & 0x80) {
fprintf(stderr, "Sysex aborted, received 0x%02x\n", c);
channelStatus(c);
break;
}
sysexMsg[sysexSize++] = c;
if (sysexSize == sysexMaxSize) {
unsigned char* p = new unsigned char[sysexMaxSize*2];
memcpy(p, sysexMsg, sysexSize);
delete[] sysexMsg;
sysexMsg = p;
sysexMaxSize *= 2;
}
break;
case SYNC:
if ((c & 0x80) == 0) // ignore input
break;
channelStatus(c);
break;
case CHANNEL:
if (c & 0x80) {
channelStatus(c);
break;
}
// else use running status
case DATA1:
if (c & 0x80) {
fprintf(stderr, "lost DATA\n");
channelStatus(c);
break;
}
switch (recChannel & 0xf0) {
case 0x80:
case 0x90:
case 0xa0:
case 0xb0:
case 0xe0:
recData1 = c;
recState = DATA2;
break;
case 0xc0:
case 0xd0:
recState = CHANNEL;
eventReceived(recChannel, c, 0);
break;
}
break;
case DATA2:
if (c & 0x80) {
fprintf(stderr, "lost DATA %02x %02x\n", recChannel, recData1);
channelStatus(c);
break;
}
recState = CHANNEL;
eventReceived(recChannel, recData1, c);
break;
}
}
}
//---------------------------------------------------------
// channelStatus
// channel status byte received
//---------------------------------------------------------
void MidiRawIn::channelStatus(unsigned char c)
{
if ((c & 0xf0) != 0xf0) {
recChannel = c;
recState = DATA1;
return;
}
//
// System Common Messages
//
switch (c) {
case 0xf0:
recState = SYSEX;
if (sysexMsg == 0) {
sysexMsg = new unsigned char[512];
sysexMaxSize = 512;
}
sysexSize = 0;
break;
case 0xf1:
recState = MTCQ;
break;
case 0xf2: // song position
recState = SONGPTR1;
break;
case 0xf3: // song select
recState = SONGSELECT;
break;
case 0xf4:
case 0xf5:
case 0xf6: // tune request
break;
default:
fprintf(stderr, "unknown RT %02x\n", recChannel);
break;
}
}
|
