mirror of https://github.com/ericonr/sndio.git
165 lines
4.7 KiB
C
165 lines
4.7 KiB
C
/* $OpenBSD: sndio.h,v 1.3 2009/07/25 11:27:14 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/param.h>
|
|
|
|
/*
|
|
* private ``handle'' structure
|
|
*/
|
|
struct sio_hdl;
|
|
struct mio_hdl;
|
|
|
|
/*
|
|
* parameters of a full-duplex stream
|
|
*/
|
|
struct sio_par {
|
|
unsigned bits; /* bits per sample */
|
|
unsigned bps; /* bytes per sample */
|
|
unsigned sig; /* 1 = signed, 0 = unsigned */
|
|
unsigned le; /* 1 = LE, 0 = BE byte order */
|
|
unsigned msb; /* 1 = MSB, 0 = LSB aligned */
|
|
unsigned rchan; /* number channels for recording direction */
|
|
unsigned pchan; /* number channels for playback direction */
|
|
unsigned rate; /* frames per second */
|
|
unsigned 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 xrun; /* what to do on overruns/underruns */
|
|
unsigned round; /* optimal bufsz divisor */
|
|
unsigned appbufsz; /* minimum buffer size */
|
|
int __pad[3]; /* for future use */
|
|
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 bits;
|
|
unsigned bps;
|
|
unsigned sig;
|
|
unsigned le;
|
|
unsigned msb;
|
|
} enc[SIO_NENC];
|
|
unsigned rchan[SIO_NCHAN]; /* allowed values for rchan */
|
|
unsigned pchan[SIO_NCHAN]; /* allowed values for pchan */
|
|
unsigned rate[SIO_NRATE]; /* allowed rates */
|
|
int __pad[7]; /* for future use */
|
|
unsigned nconf; /* number of elements in confs[] */
|
|
struct sio_conf {
|
|
unsigned enc; /* mask of enc[] indexes */
|
|
unsigned rchan; /* mask of chan[] indexes (rec) */
|
|
unsigned pchan; /* mask of chan[] indexes (play) */
|
|
unsigned rate; /* mask of rate[] indexes */
|
|
} confs[SIO_NCONF];
|
|
};
|
|
|
|
#define SIO_XSTRINGS { "ignore", "sync", "error" }
|
|
|
|
/*
|
|
* mode bitmap
|
|
*/
|
|
#define SIO_PLAY 1
|
|
#define SIO_REC 2
|
|
#define MIO_OUT 4
|
|
#define MIO_IN 8
|
|
|
|
/*
|
|
* maximum size of the encording string (the longest possible
|
|
* encoding is ``s24le3msb'')
|
|
*/
|
|
#define SIO_ENCMAX 10
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* default device for the sun audio(4) back-end
|
|
*/
|
|
#define SIO_SUN_PATH "/dev/audio"
|
|
|
|
/*
|
|
* default socket name for the aucat(1) back-end
|
|
*/
|
|
#define SIO_AUCAT_PATH "default"
|
|
|
|
/*
|
|
* maximum value of volume, eg. for sio_setvol()
|
|
*/
|
|
#define SIO_MAXVOL 127
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct pollfd;
|
|
|
|
int sio_strtoenc(struct sio_par *, char *);
|
|
int sio_enctostr(struct sio_par *, char *);
|
|
void sio_initpar(struct sio_par *);
|
|
|
|
struct sio_hdl *sio_open(const char *, unsigned, 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);
|
|
void sio_onvol(struct sio_hdl *, void (*)(void *, unsigned), void *);
|
|
|
|
struct mio_hdl *mio_open(const char *, unsigned, 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 *);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* !defined(SNDIO_H) */
|