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/* $OpenBSD: safile.c,v 1.18 2009/09/27 11:51:20 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/time.h>
#include <sys/types.h>
#include <poll.h>
#include <sndio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aparams.h"
#include "aproc.h"
#include "conf.h"
#include "dev.h"
#include "file.h"
#include "safile.h"
struct safile {
struct file file;
struct sio_hdl *hdl;
int started;
};
void safile_close(struct file *);
unsigned safile_read(struct file *, unsigned char *, unsigned);
unsigned safile_write(struct file *, unsigned char *, unsigned);
void safile_start(struct file *);
void safile_stop(struct file *);
int safile_nfds(struct file *);
int safile_pollfd(struct file *, struct pollfd *, int);
int safile_revents(struct file *, struct pollfd *);
struct fileops safile_ops = {
"sio",
sizeof(struct safile),
safile_close,
safile_read,
safile_write,
safile_start,
safile_stop,
safile_nfds,
safile_pollfd,
safile_revents
};
void
safile_cb(void *addr, int delta)
{
struct safile *f = (struct safile *)addr;
struct aproc *p;
if (delta != 0) {
p = f->file.wproc;
if (p && p->ops->opos)
p->ops->opos(p, NULL, delta);
}
if (delta != 0) {
p = f->file.rproc;
if (p && p->ops->ipos)
p->ops->ipos(p, NULL, delta);
}
}
/*
* Open the device.
*/
struct safile *
safile_new(struct fileops *ops, char *path,
struct aparams *ipar, struct aparams *opar,
unsigned *bufsz, unsigned *round)
{
struct sio_par par;
struct sio_hdl *hdl;
struct safile *f;
int mode;
mode = 0;
if (ipar)
mode |= SIO_REC;
if (opar)
mode |= SIO_PLAY;
hdl = sio_open(path, mode, 1);
if (hdl == NULL)
return NULL;
sio_initpar(&par);
if (ipar) {
par.bits = ipar->bits;
par.bps = ipar->bps;
par.sig = ipar->sig;
par.le = ipar->le;
par.msb = ipar->msb;
par.rate = ipar->rate;
par.rchan = ipar->cmax - ipar->cmin + 1;
} else {
par.bits = opar->bits;
par.bps = opar->bps;
par.sig = opar->sig;
par.le = opar->le;
par.msb = opar->msb;
par.rate = opar->rate;
}
if (opar)
par.pchan = opar->cmax - opar->cmin + 1;
par.appbufsz = *bufsz;
par.round = *round;
if (!sio_setpar(hdl, &par))
goto bad_close;
if (!sio_getpar(hdl, &par))
goto bad_close;
if (ipar) {
ipar->bits = par.bits;
ipar->bps = par.bps;
ipar->sig = par.sig;
ipar->le = par.le;
ipar->msb = par.msb;
ipar->rate = par.rate;
ipar->cmax = ipar->cmin + par.rchan - 1;
}
if (opar) {
opar->bits = par.bits;
opar->bps = par.bps;
opar->sig = par.sig;
opar->le = par.le;
opar->msb = par.msb;
opar->rate = par.rate;
opar->cmax = opar->cmin + par.pchan - 1;
}
*bufsz = par.bufsz;
*round = par.round;
f = (struct safile *)file_new(ops, "hdl", sio_nfds(hdl));
if (f == NULL)
goto bad_close;
f->hdl = hdl;
f->started = 0;
sio_onmove(f->hdl, safile_cb, f);
return f;
bad_close:
sio_close(hdl);
return NULL;
}
void
safile_start(struct file *file)
{
struct safile *f = (struct safile *)file;
if (!sio_start(f->hdl)) {
file_close(file);
return;
}
f->started = 1;
}
void
safile_stop(struct file *file)
{
struct safile *f = (struct safile *)file;
f->started = 0;
if (!sio_eof(f->hdl) && !sio_stop(f->hdl)) {
file_close(file);
return;
}
}
unsigned
safile_read(struct file *file, unsigned char *data, unsigned count)
{
struct safile *f = (struct safile *)file;
unsigned n;
n = sio_read(f->hdl, data, count);
if (n == 0) {
f->file.state &= ~FILE_ROK;
if (sio_eof(f->hdl)) {
file_eof(&f->file);
} else {
}
return 0;
}
return n;
}
unsigned
safile_write(struct file *file, unsigned char *data, unsigned count)
{
struct safile *f = (struct safile *)file;
unsigned n;
n = sio_write(f->hdl, data, count);
if (n == 0) {
f->file.state &= ~FILE_WOK;
if (sio_eof(f->hdl)) {
file_hup(&f->file);
} else {
}
return 0;
}
return n;
}
int
safile_nfds(struct file *file)
{
return sio_nfds(((struct safile *)file)->hdl);
}
int
safile_pollfd(struct file *file, struct pollfd *pfd, int events)
{
return sio_pollfd(((struct safile *)file)->hdl, pfd, events);
}
int
safile_revents(struct file *file, struct pollfd *pfd)
{
return sio_revents(((struct safile *)file)->hdl, pfd);
}
void
safile_close(struct file *file)
{
struct safile *f = (struct safile *)file;
if (f->started)
safile_stop(&f->file);
return sio_close(((struct safile *)file)->hdl);
}
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