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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* $OpenBSD: mio.c,v 1.18 2013/11/13 22:38:22 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
#include "mio_priv.h"
struct mio_hdl *
mio_open(const char *str, unsigned int mode, int nbio)
{
static char portany[] = MIO_PORTANY;
struct mio_hdl *hdl;
const char *p;
#ifdef DEBUG
_sndio_debug_init();
#endif
if ((mode & (MIO_OUT | MIO_IN)) == 0)
return NULL;
if (str == NULL) /* backward compat */
str = portany;
if (strcmp(str, portany) == 0 && !issetugid()) {
str = getenv("MIDIDEVICE");
if (str == NULL)
str = portany;
}
if (strcmp(str, portany) == 0) {
hdl = _mio_aucat_open("/0", mode, nbio, 1);
if (hdl != NULL)
return hdl;
return _mio_rmidi_open("/0", mode, nbio);
}
if ((p = _sndio_parsetype(str, "snd")) != NULL ||
(p = _sndio_parsetype(str, "aucat")) != NULL)
return _mio_aucat_open(p, mode, nbio, 0);
if ((p = _sndio_parsetype(str, "midithru")) != NULL)
return _mio_aucat_open(p, mode, nbio, 1);
if ((p = _sndio_parsetype(str, "midi")) != NULL)
return _mio_aucat_open(p, mode, nbio, 2);
if ((p = _sndio_parsetype(str, "rmidi")) != NULL) {
return _mio_rmidi_open(p, mode, nbio);
}
DPRINTF("mio_open: %s: unknown device type\n", str);
return NULL;
}
void
_mio_create(struct mio_hdl *hdl, struct mio_ops *ops,
unsigned int mode, int nbio)
{
hdl->ops = ops;
hdl->mode = mode;
hdl->nbio = nbio;
hdl->eof = 0;
}
void
mio_close(struct mio_hdl *hdl)
{
hdl->ops->close(hdl);
}
static int
mio_psleep(struct mio_hdl *hdl, int event)
{
struct pollfd pfd[MIO_MAXNFDS];
int revents;
int nfds;
nfds = mio_nfds(hdl);
if (nfds > MIO_MAXNFDS) {
DPRINTF("mio_psleep: %d: too many descriptors\n", nfds);
hdl->eof = 1;
return 0;
}
for (;;) {
nfds = mio_pollfd(hdl, pfd, event);
while (poll(pfd, nfds, -1) < 0) {
if (errno == EINTR)
continue;
DPERROR("mio_psleep: poll");
hdl->eof = 1;
return 0;
}
revents = mio_revents(hdl, pfd);
if (revents & POLLHUP) {
DPRINTF("mio_psleep: hang-up\n");
return 0;
}
if (revents & event)
break;
}
return 1;
}
size_t
mio_read(struct mio_hdl *hdl, void *buf, size_t len)
{
unsigned int n;
char *data = buf;
size_t todo = len;
if (hdl->eof) {
DPRINTF("mio_read: eof\n");
return 0;
}
if (!(hdl->mode & MIO_IN)) {
DPRINTF("mio_read: not input device\n");
hdl->eof = 1;
return 0;
}
if (len == 0) {
DPRINTF("mio_read: zero length read ignored\n");
return 0;
}
while (todo > 0) {
n = hdl->ops->read(hdl, data, todo);
if (n == 0 && hdl->eof)
break;
data += n;
todo -= n;
if (n > 0 || hdl->nbio)
break;
if (!mio_psleep(hdl, POLLIN))
break;
}
return len - todo;
}
size_t
mio_write(struct mio_hdl *hdl, const void *buf, size_t len)
{
unsigned int n;
const unsigned char *data = buf;
size_t todo = len;
if (hdl->eof) {
DPRINTF("mio_write: eof\n");
return 0;
}
if (!(hdl->mode & MIO_OUT)) {
DPRINTF("mio_write: not output device\n");
hdl->eof = 1;
return 0;
}
if (len == 0) {
DPRINTF("mio_write: zero length write ignored\n");
return 0;
}
if (todo == 0) {
DPRINTF("mio_write: zero length write ignored\n");
return 0;
}
while (todo > 0) {
n = hdl->ops->write(hdl, data, todo);
if (n == 0) {
if (hdl->nbio || hdl->eof)
break;
if (!mio_psleep(hdl, POLLOUT))
break;
continue;
}
data += n;
todo -= n;
}
return len - todo;
}
int
mio_nfds(struct mio_hdl *hdl)
{
return hdl->ops->nfds(hdl);
}
int
mio_pollfd(struct mio_hdl *hdl, struct pollfd *pfd, int events)
{
if (hdl->eof)
return 0;
return hdl->ops->pollfd(hdl, pfd, events);
}
int
mio_revents(struct mio_hdl *hdl, struct pollfd *pfd)
{
if (hdl->eof)
return POLLHUP;
return hdl->ops->revents(hdl, pfd);
}
int
mio_eof(struct mio_hdl *hdl)
{
return hdl->eof;
}
|
