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/* $OpenBSD: siofile.c,v 1.4 2010/04/06 20:07:01 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 "abuf.h"
#include "conf.h"
#include "dev.h"
#include "file.h"
#include "siofile.h"
#ifdef DEBUG
#include "dbg.h"
#endif
struct siofile {
struct file file;
struct sio_hdl *hdl;
unsigned wtickets, wbpf;
unsigned rtickets, rbpf;
unsigned bufsz;
int started;
};
void siofile_close(struct file *);
unsigned siofile_read(struct file *, unsigned char *, unsigned);
unsigned siofile_write(struct file *, unsigned char *, unsigned);
void siofile_start(struct file *);
void siofile_stop(struct file *);
int siofile_nfds(struct file *);
int siofile_pollfd(struct file *, struct pollfd *, int);
int siofile_revents(struct file *, struct pollfd *);
struct fileops siofile_ops = {
"sio",
sizeof(struct siofile),
siofile_close,
siofile_read,
siofile_write,
siofile_start,
siofile_stop,
siofile_nfds,
siofile_pollfd,
siofile_revents
};
int wsio_out(struct aproc *, struct abuf *);
int rsio_in(struct aproc *, struct abuf *);
struct aproc_ops rsio_ops = {
"rsio",
rsio_in,
rfile_out,
rfile_eof,
rfile_hup,
NULL, /* newin */
NULL, /* newout */
aproc_ipos,
aproc_opos,
rfile_done
};
struct aproc_ops wsio_ops = {
"wsio",
wfile_in,
wsio_out,
wfile_eof,
wfile_hup,
NULL, /* newin */
NULL, /* newout */
aproc_ipos,
aproc_opos,
wfile_done
};
struct aproc *
rsio_new(struct file *f)
{
struct aproc *p;
p = aproc_new(&rsio_ops, f->name);
p->u.io.file = f;
p->u.io.partial = 0;
f->rproc = p;
return p;
}
struct aproc *
wsio_new(struct file *f)
{
struct aproc *p;
p = aproc_new(&wsio_ops, f->name);
p->u.io.file = f;
p->u.io.partial = 0;
f->wproc = p;
return p;
}
int
wsio_out(struct aproc *p, struct abuf *obuf)
{
struct siofile *f = (struct siofile *)p->u.io.file;
if (f->wtickets == 0) {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": no more write tickets\n");
}
#endif
f->file.state &= ~FILE_WOK;
return 0;
}
return wfile_out(p, obuf);
}
int
rsio_in(struct aproc *p, struct abuf *ibuf)
{
struct siofile *f = (struct siofile *)p->u.io.file;
if (f->rtickets == 0) {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": no more read tickets\n");
}
#endif
f->file.state &= ~FILE_ROK;
return 0;
}
return rfile_in(p, ibuf);
}
void
siofile_cb(void *addr, int delta)
{
struct siofile *f = (struct siofile *)addr;
struct aproc *p;
#ifdef DEBUG
if (delta < 0 || delta > (60 * RATE_MAX)) {
file_dbg(&f->file);
dbg_puts(": ");
dbg_puti(delta);
dbg_puts(": bogus sndio delta");
dbg_panic();
}
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": tick, delta = ");
dbg_puti(delta);
dbg_puts("\n");
}
#endif
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);
}
f->wtickets += delta * f->wbpf;
f->rtickets += delta * f->rbpf;
}
/*
* Open the device.
*/
struct siofile *
siofile_new(struct fileops *ops, char *path, unsigned mode,
struct aparams *ipar, struct aparams *opar,
unsigned *bufsz, unsigned *round)
{
struct sio_par par;
struct sio_hdl *hdl;
struct siofile *f;
hdl = sio_open(path, mode, 1);
if (hdl == NULL)
return NULL;
sio_initpar(&par);
if (mode & SIO_REC) {
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 (mode & SIO_PLAY)
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 (mode & SIO_REC) {
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 (mode & SIO_PLAY) {
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;
if (path == NULL)
path = "default";
f = (struct siofile *)file_new(ops, path, sio_nfds(hdl));
if (f == NULL)
goto bad_close;
f->hdl = hdl;
f->started = 0;
f->wtickets = 0;
f->rtickets = 0;
f->wbpf = par.pchan * par.bps;
f->rbpf = par.rchan * par.bps;
f->bufsz = par.bufsz;
sio_onmove(f->hdl, siofile_cb, f);
return f;
bad_close:
sio_close(hdl);
return NULL;
}
void
siofile_start(struct file *file)
{
struct siofile *f = (struct siofile *)file;
if (!sio_start(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to start device\n");
#endif
file_close(file);
return;
}
f->started = 1;
f->wtickets = f->bufsz * f->wbpf;
f->rtickets = 0;
#ifdef DEBUG
if (debug_level >= 3) {
file_dbg(&f->file);
dbg_puts(": started\n");
}
#endif
}
void
siofile_stop(struct file *file)
{
struct siofile *f = (struct siofile *)file;
f->started = 0;
if (!sio_eof(f->hdl) && !sio_stop(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to stop device\n");
#endif
file_close(file);
return;
}
#ifdef DEBUG
if (debug_level >= 3) {
file_dbg(&f->file);
dbg_puts(": stopped\n");
}
#endif
}
unsigned
siofile_read(struct file *file, unsigned char *data, unsigned count)
{
struct siofile *f = (struct siofile *)file;
unsigned n;
#ifdef DEBUG
if (f->rtickets == 0) {
file_dbg(&f->file);
dbg_puts(": called with no read tickets\n");
}
#endif
if (count > f->rtickets)
count = f->rtickets;
n = f->started ? sio_read(f->hdl, data, count) : 0;
if (n == 0) {
f->file.state &= ~FILE_ROK;
if (sio_eof(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to read from device\n");
#endif
file_eof(&f->file);
} else {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": reading blocked\n");
}
#endif
}
return 0;
} else {
f->rtickets -= n;
if (f->rtickets == 0) {
f->file.state &= ~FILE_ROK;
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": read tickets exhausted\n");
}
#endif
}
}
return n;
}
unsigned
siofile_write(struct file *file, unsigned char *data, unsigned count)
{
struct siofile *f = (struct siofile *)file;
unsigned n;
#ifdef DEBUG
if (f->wtickets == 0) {
file_dbg(&f->file);
dbg_puts(": called with no write tickets\n");
}
#endif
if (count > f->wtickets)
count = f->wtickets;
n = f->started ? sio_write(f->hdl, data, count) : 0;
if (n == 0) {
f->file.state &= ~FILE_WOK;
if (sio_eof(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to write on device\n");
#endif
file_hup(&f->file);
} else {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": writing blocked\n");
}
#endif
}
return 0;
} else {
f->wtickets -= n;
if (f->wtickets == 0) {
f->file.state &= ~FILE_WOK;
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": write tickets exhausted\n");
}
#endif
}
}
return n;
}
int
siofile_nfds(struct file *file)
{
return sio_nfds(((struct siofile *)file)->hdl);
}
int
siofile_pollfd(struct file *file, struct pollfd *pfd, int events)
{
struct siofile *f = (struct siofile *)file;
if (!f->started)
events &= ~(POLLIN | POLLOUT);
return sio_pollfd(((struct siofile *)file)->hdl, pfd, events);
}
int
siofile_revents(struct file *file, struct pollfd *pfd)
{
return sio_revents(((struct siofile *)file)->hdl, pfd);
}
void
siofile_close(struct file *file)
{
struct siofile *f = (struct siofile *)file;
if (f->started)
siofile_stop(&f->file);
return sio_close(((struct siofile *)file)->hdl);
}
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