mirror of https://github.com/ericonr/sndio.git
207 lines
6.4 KiB
C
207 lines
6.4 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef SNDIO_H
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#define SNDIO_H
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#include <sys/types.h>
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/*
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* default audio device and MIDI port
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*/
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#define SIO_DEVANY "default"
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#define MIO_PORTANY "default"
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/*
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* limits
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*/
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#define SIOCTL_NAMEMAX 12 /* max name length */
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/*
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* private ``handle'' structure
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*/
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struct sio_hdl;
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struct mio_hdl;
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struct sioctl_hdl;
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/*
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* parameters of a full-duplex stream
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*/
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struct sio_par {
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unsigned int bits; /* bits per sample */
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unsigned int bps; /* bytes per sample */
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unsigned int sig; /* 1 = signed, 0 = unsigned */
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unsigned int le; /* 1 = LE, 0 = BE byte order */
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unsigned int msb; /* 1 = MSB, 0 = LSB aligned */
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unsigned int rchan; /* number channels for recording direction */
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unsigned int pchan; /* number channels for playback direction */
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unsigned int rate; /* frames per second */
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unsigned int bufsz; /* end-to-end buffer size */
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#define SIO_IGNORE 0 /* pause during xrun */
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#define SIO_SYNC 1 /* resync after xrun */
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#define SIO_ERROR 2 /* terminate on xrun */
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unsigned int xrun; /* what to do on overruns/underruns */
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unsigned int round; /* optimal bufsz divisor */
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unsigned int appbufsz; /* minimum buffer size */
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int __pad[3]; /* for future use */
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unsigned int __magic; /* for internal/debug purposes only */
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};
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/*
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* capabilities of a stream
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*/
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struct sio_cap {
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#define SIO_NENC 8
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#define SIO_NCHAN 8
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#define SIO_NRATE 16
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#define SIO_NCONF 4
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struct sio_enc { /* allowed sample encodings */
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unsigned int bits;
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unsigned int bps;
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unsigned int sig;
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unsigned int le;
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unsigned int msb;
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} enc[SIO_NENC];
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unsigned int rchan[SIO_NCHAN]; /* allowed values for rchan */
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unsigned int pchan[SIO_NCHAN]; /* allowed values for pchan */
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unsigned int rate[SIO_NRATE]; /* allowed rates */
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int __pad[7]; /* for future use */
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unsigned int nconf; /* number of elements in confs[] */
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struct sio_conf {
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unsigned int enc; /* mask of enc[] indexes */
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unsigned int rchan; /* mask of chan[] indexes (rec) */
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unsigned int pchan; /* mask of chan[] indexes (play) */
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unsigned int rate; /* mask of rate[] indexes */
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} confs[SIO_NCONF];
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};
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#define SIO_XSTRINGS { "ignore", "sync", "error" }
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/*
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* controlled component of the device
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*/
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struct sioctl_node {
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char name[SIOCTL_NAMEMAX]; /* ex. "spkr" */
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int unit; /* optional number or -1 */
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};
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/*
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* description of a control (index, value) pair
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*/
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struct sioctl_desc {
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unsigned int addr; /* control address */
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#define SIOCTL_NONE 0 /* deleted */
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#define SIOCTL_NUM 2 /* integer in the 0..maxval range */
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#define SIOCTL_SW 3 /* on/off switch (0 or 1) */
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#define SIOCTL_VEC 4 /* number, element of vector */
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#define SIOCTL_LIST 5 /* switch, element of a list */
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#define SIOCTL_SEL 6 /* element of a selector */
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unsigned int type; /* one of above */
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char func[SIOCTL_NAMEMAX]; /* function name, ex. "level" */
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char group[SIOCTL_NAMEMAX]; /* group this control belongs to */
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struct sioctl_node node0; /* affected node */
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struct sioctl_node node1; /* dito for SIOCTL_{VEC,LIST,SEL} */
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unsigned int maxval; /* max value */
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int __pad[3];
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};
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/*
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* mode bitmap
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*/
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#define SIO_PLAY 1
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#define SIO_REC 2
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#define MIO_OUT 4
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#define MIO_IN 8
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#define SIOCTL_READ 0x100
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#define SIOCTL_WRITE 0x200
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/*
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* default bytes per sample for the given bits per sample
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*/
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#define SIO_BPS(bits) (((bits) <= 8) ? 1 : (((bits) <= 16) ? 2 : 4))
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/*
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* default value of "sio_par->le" flag
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*/
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define SIO_LE_NATIVE 1
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#else
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#define SIO_LE_NATIVE 0
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#endif
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/*
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* maximum value of volume, eg. for sio_setvol()
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*/
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#define SIO_MAXVOL 127
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct pollfd;
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void sio_initpar(struct sio_par *);
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struct sio_hdl *sio_open(const char *, unsigned int, int);
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void sio_close(struct sio_hdl *);
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int sio_setpar(struct sio_hdl *, struct sio_par *);
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int sio_getpar(struct sio_hdl *, struct sio_par *);
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int sio_getcap(struct sio_hdl *, struct sio_cap *);
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void sio_onmove(struct sio_hdl *, void (*)(void *, int), void *);
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size_t sio_write(struct sio_hdl *, const void *, size_t);
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size_t sio_read(struct sio_hdl *, void *, size_t);
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int sio_start(struct sio_hdl *);
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int sio_stop(struct sio_hdl *);
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int sio_nfds(struct sio_hdl *);
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int sio_pollfd(struct sio_hdl *, struct pollfd *, int);
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int sio_revents(struct sio_hdl *, struct pollfd *);
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int sio_eof(struct sio_hdl *);
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int sio_setvol(struct sio_hdl *, unsigned int);
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int sio_onvol(struct sio_hdl *, void (*)(void *, unsigned int), void *);
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struct mio_hdl *mio_open(const char *, unsigned int, int);
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void mio_close(struct mio_hdl *);
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size_t mio_write(struct mio_hdl *, const void *, size_t);
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size_t mio_read(struct mio_hdl *, void *, size_t);
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int mio_nfds(struct mio_hdl *);
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int mio_pollfd(struct mio_hdl *, struct pollfd *, int);
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int mio_revents(struct mio_hdl *, struct pollfd *);
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int mio_eof(struct mio_hdl *);
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struct sioctl_hdl *sioctl_open(const char *, unsigned int, int);
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void sioctl_close(struct sioctl_hdl *);
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int sioctl_ondesc(struct sioctl_hdl *,
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void (*)(void *, struct sioctl_desc *, int), void *);
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int sioctl_onval(struct sioctl_hdl *,
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void (*)(void *, unsigned int, unsigned int), void *);
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int sioctl_setval(struct sioctl_hdl *, unsigned int, unsigned int);
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int sioctl_nfds(struct sioctl_hdl *);
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int sioctl_pollfd(struct sioctl_hdl *, struct pollfd *, int);
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int sioctl_revents(struct sioctl_hdl *, struct pollfd *);
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int sioctl_eof(struct sioctl_hdl *);
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int mio_rmidi_getfd(const char *, unsigned int, int);
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struct mio_hdl *mio_rmidi_fdopen(int, unsigned int, int);
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int sio_sun_getfd(const char *, unsigned int, int);
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struct sio_hdl *sio_sun_fdopen(int, unsigned int, int);
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int sioctl_sun_getfd(const char *, unsigned int, int);
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struct sioctl_hdl *sioctl_sun_fdopen(int, unsigned int, int);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !defined(SNDIO_H) */
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