Annotation of src/include/sndio.h, Revision 1.4
1.4 ! ratchov 1: /* $OpenBSD$ */
1.1 ratchov 2: /*
3: * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifndef SNDIO_H
18: #define SNDIO_H
19:
20: #include <sys/param.h>
21:
22: /*
23: * private ``handle'' structure
24: */
25: struct sio_hdl;
1.2 ratchov 26: struct mio_hdl;
1.1 ratchov 27:
28: /*
29: * parameters of a full-duplex stream
30: */
31: struct sio_par {
32: unsigned bits; /* bits per sample */
33: unsigned bps; /* bytes per sample */
34: unsigned sig; /* 1 = signed, 0 = unsigned */
35: unsigned le; /* 1 = LE, 0 = BE byte order */
36: unsigned msb; /* 1 = MSB, 0 = LSB aligned */
37: unsigned rchan; /* number channels for recording direction */
38: unsigned pchan; /* number channels for playback direction */
39: unsigned rate; /* frames per second */
40: unsigned bufsz; /* end-to-end buffer size */
41: #define SIO_IGNORE 0 /* pause during xrun */
42: #define SIO_SYNC 1 /* resync after xrun */
43: #define SIO_ERROR 2 /* terminate on xrun */
44: unsigned xrun; /* what to do on overruns/underruns */
45: unsigned round; /* optimal bufsz divisor */
46: unsigned appbufsz; /* minimum buffer size */
47: int __pad[3]; /* for future use */
48: int __magic; /* for internal/debug purposes only */
49: };
50:
51: /*
52: * capabilities of a stream
53: */
54: struct sio_cap {
55: #define SIO_NENC 8
56: #define SIO_NCHAN 8
57: #define SIO_NRATE 16
58: #define SIO_NCONF 4
59: struct sio_enc { /* allowed sample encodings */
60: unsigned bits;
61: unsigned bps;
62: unsigned sig;
63: unsigned le;
64: unsigned msb;
65: } enc[SIO_NENC];
66: unsigned rchan[SIO_NCHAN]; /* allowed values for rchan */
67: unsigned pchan[SIO_NCHAN]; /* allowed values for pchan */
68: unsigned rate[SIO_NRATE]; /* allowed rates */
69: int __pad[7]; /* for future use */
70: unsigned nconf; /* number of elements in confs[] */
71: struct sio_conf {
72: unsigned enc; /* mask of enc[] indexes */
73: unsigned rchan; /* mask of chan[] indexes (rec) */
74: unsigned pchan; /* mask of chan[] indexes (play) */
75: unsigned rate; /* mask of rate[] indexes */
76: } confs[SIO_NCONF];
77: };
78:
79: #define SIO_XSTRINGS { "ignore", "sync", "error" }
80:
81: /*
82: * mode bitmap
83: */
84: #define SIO_PLAY 1
85: #define SIO_REC 2
1.2 ratchov 86: #define MIO_OUT 4
87: #define MIO_IN 8
1.1 ratchov 88:
89: /*
90: * default bytes per sample for the given bits per sample
91: */
92: #define SIO_BPS(bits) (((bits) <= 8) ? 1 : (((bits) <= 16) ? 2 : 4))
93:
94: /*
95: * default value of "sio_par->le" flag
96: */
97: #if BYTE_ORDER == LITTLE_ENDIAN
98: #define SIO_LE_NATIVE 1
99: #else
100: #define SIO_LE_NATIVE 0
101: #endif
102:
103: /*
104: * maximum value of volume, eg. for sio_setvol()
105: */
106: #define SIO_MAXVOL 127
107:
108: #ifdef __cplusplus
109: extern "C" {
110: #endif
111:
112: struct pollfd;
113:
114: void sio_initpar(struct sio_par *);
1.3 ratchov 115: struct sio_hdl *sio_open(const char *, unsigned, int);
1.1 ratchov 116: void sio_close(struct sio_hdl *);
117: int sio_setpar(struct sio_hdl *, struct sio_par *);
118: int sio_getpar(struct sio_hdl *, struct sio_par *);
119: int sio_getcap(struct sio_hdl *, struct sio_cap *);
120: void sio_onmove(struct sio_hdl *, void (*)(void *, int), void *);
1.3 ratchov 121: size_t sio_write(struct sio_hdl *, const void *, size_t);
1.1 ratchov 122: size_t sio_read(struct sio_hdl *, void *, size_t);
123: int sio_start(struct sio_hdl *);
124: int sio_stop(struct sio_hdl *);
125: int sio_nfds(struct sio_hdl *);
126: int sio_pollfd(struct sio_hdl *, struct pollfd *, int);
127: int sio_revents(struct sio_hdl *, struct pollfd *);
128: int sio_eof(struct sio_hdl *);
129: int sio_setvol(struct sio_hdl *, unsigned);
1.4 ! ratchov 130: int sio_onvol(struct sio_hdl *, void (*)(void *, unsigned), void *);
1.2 ratchov 131:
1.3 ratchov 132: struct mio_hdl *mio_open(const char *, unsigned, int);
1.2 ratchov 133: void mio_close(struct mio_hdl *);
1.3 ratchov 134: size_t mio_write(struct mio_hdl *, const void *, size_t);
1.2 ratchov 135: size_t mio_read(struct mio_hdl *, void *, size_t);
136: int mio_nfds(struct mio_hdl *);
137: int mio_pollfd(struct mio_hdl *, struct pollfd *, int);
138: int mio_revents(struct mio_hdl *, struct pollfd *);
139: int mio_eof(struct mio_hdl *);
1.1 ratchov 140:
141: #ifdef __cplusplus
142: }
143: #endif
144:
145: #endif /* !defined(SNDIO_H) */
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