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
|
/* $OpenBSD: sndio.h,v 1.10 2020/02/26 13:53:58 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.
*/
#ifndef SNDIO_H
#define SNDIO_H
#include <sys/types.h>
/*
* default audio device and MIDI port
*/
#define SIO_DEVANY "default"
#define MIO_PORTANY "default"
/*
* limits
*/
#define SIOCTL_NAMEMAX 12 /* max name length */
/*
* private ``handle'' structure
*/
struct sio_hdl;
struct mio_hdl;
struct sioctl_hdl;
/*
* parameters of a full-duplex stream
*/
struct sio_par {
unsigned int bits; /* bits per sample */
unsigned int bps; /* bytes per sample */
unsigned int sig; /* 1 = signed, 0 = unsigned */
unsigned int le; /* 1 = LE, 0 = BE byte order */
unsigned int msb; /* 1 = MSB, 0 = LSB aligned */
unsigned int rchan; /* number channels for recording direction */
unsigned int pchan; /* number channels for playback direction */
unsigned int rate; /* frames per second */
unsigned int bufsz; /* end-to-end buffer size */
#define SIO_IGNORE 0 /* pause during xrun */
#define SIO_SYNC 1 /* resync after xrun */
#define SIO_ERROR 2 /* terminate on xrun */
unsigned int xrun; /* what to do on overruns/underruns */
unsigned int round; /* optimal bufsz divisor */
unsigned int appbufsz; /* minimum buffer size */
int __pad[3]; /* for future use */
unsigned int __magic; /* for internal/debug purposes only */
};
/*
* capabilities of a stream
*/
struct sio_cap {
#define SIO_NENC 8
#define SIO_NCHAN 8
#define SIO_NRATE 16
#define SIO_NCONF 4
struct sio_enc { /* allowed sample encodings */
unsigned int bits;
unsigned int bps;
unsigned int sig;
unsigned int le;
unsigned int msb;
} enc[SIO_NENC];
unsigned int rchan[SIO_NCHAN]; /* allowed values for rchan */
unsigned int pchan[SIO_NCHAN]; /* allowed values for pchan */
unsigned int rate[SIO_NRATE]; /* allowed rates */
int __pad[7]; /* for future use */
unsigned int nconf; /* number of elements in confs[] */
struct sio_conf {
unsigned int enc; /* mask of enc[] indexes */
unsigned int rchan; /* mask of chan[] indexes (rec) */
unsigned int pchan; /* mask of chan[] indexes (play) */
unsigned int rate; /* mask of rate[] indexes */
} confs[SIO_NCONF];
};
#define SIO_XSTRINGS { "ignore", "sync", "error" }
/*
* controlled component of the device
*/
struct sioctl_node {
char name[SIOCTL_NAMEMAX]; /* ex. "spkr" */
int unit; /* optional number or -1 */
};
/*
* description of a control (index, value) pair
*/
struct sioctl_desc {
unsigned int addr; /* control address */
#define SIOCTL_NONE 0 /* deleted */
#define SIOCTL_NUM 2 /* integer in the 0..127 range */
#define SIOCTL_SW 3 /* on/off switch (0 or 1) */
#define SIOCTL_VEC 4 /* number, element of vector */
#define SIOCTL_LIST 5 /* switch, element of a list */
unsigned int type; /* one of above */
char func[SIOCTL_NAMEMAX]; /* function name, ex. "level" */
char group[SIOCTL_NAMEMAX]; /* group this control belongs to */
struct sioctl_node node0; /* affected node */
struct sioctl_node node1; /* dito for SIOCTL_{VEC,LIST} */
unsigned int maxval; /* max value for SIOCTL_{NUM,VEC} */
int __pad[3];
};
/*
* mode bitmap
*/
#define SIO_PLAY 1
#define SIO_REC 2
#define MIO_OUT 4
#define MIO_IN 8
#define SIOCTL_READ 0x100
#define SIOCTL_WRITE 0x200
/*
* default bytes per sample for the given bits per sample
*/
#define SIO_BPS(bits) (((bits) <= 8) ? 1 : (((bits) <= 16) ? 2 : 4))
/*
* default value of "sio_par->le" flag
*/
#if BYTE_ORDER == LITTLE_ENDIAN
#define SIO_LE_NATIVE 1
#else
#define SIO_LE_NATIVE 0
#endif
/*
* maximum value of volume, eg. for sio_setvol()
*/
#define SIO_MAXVOL 127
#ifdef __cplusplus
extern "C" {
#endif
struct pollfd;
void sio_initpar(struct sio_par *);
struct sio_hdl *sio_open(const char *, unsigned int, int);
void sio_close(struct sio_hdl *);
int sio_setpar(struct sio_hdl *, struct sio_par *);
int sio_getpar(struct sio_hdl *, struct sio_par *);
int sio_getcap(struct sio_hdl *, struct sio_cap *);
void sio_onmove(struct sio_hdl *, void (*)(void *, int), void *);
size_t sio_write(struct sio_hdl *, const void *, size_t);
size_t sio_read(struct sio_hdl *, void *, size_t);
int sio_start(struct sio_hdl *);
int sio_stop(struct sio_hdl *);
int sio_nfds(struct sio_hdl *);
int sio_pollfd(struct sio_hdl *, struct pollfd *, int);
int sio_revents(struct sio_hdl *, struct pollfd *);
int sio_eof(struct sio_hdl *);
int sio_setvol(struct sio_hdl *, unsigned int);
int sio_onvol(struct sio_hdl *, void (*)(void *, unsigned int), void *);
struct mio_hdl *mio_open(const char *, unsigned int, int);
void mio_close(struct mio_hdl *);
size_t mio_write(struct mio_hdl *, const void *, size_t);
size_t mio_read(struct mio_hdl *, void *, size_t);
int mio_nfds(struct mio_hdl *);
int mio_pollfd(struct mio_hdl *, struct pollfd *, int);
int mio_revents(struct mio_hdl *, struct pollfd *);
int mio_eof(struct mio_hdl *);
struct sioctl_hdl *sioctl_open(const char *, unsigned int, int);
void sioctl_close(struct sioctl_hdl *);
int sioctl_ondesc(struct sioctl_hdl *,
void (*)(void *, struct sioctl_desc *, int), void *);
int sioctl_onval(struct sioctl_hdl *,
void (*)(void *, unsigned int, unsigned int), void *);
int sioctl_setval(struct sioctl_hdl *, unsigned int, unsigned int);
int sioctl_nfds(struct sioctl_hdl *);
int sioctl_pollfd(struct sioctl_hdl *, struct pollfd *, int);
int sioctl_revents(struct sioctl_hdl *, struct pollfd *);
int sioctl_eof(struct sioctl_hdl *);
int mio_rmidi_getfd(const char *, unsigned int, int);
struct mio_hdl *mio_rmidi_fdopen(int, unsigned int, int);
int sio_sun_getfd(const char *, unsigned int, int);
struct sio_hdl *sio_sun_fdopen(int, unsigned int, int);
int sioctl_sun_getfd(const char *, unsigned int, int);
struct sioctl_hdl *sioctl_sun_fdopen(int, unsigned int, int);
#ifdef __cplusplus
}
#endif
#endif /* !defined(SNDIO_H) */
|
