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|
/* $OpenBSD: siofile.c,v 1.26 2022/04/29 08:30:48 ratchov Exp $ */
/*
* Copyright (c) 2008-2012 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 "abuf.h"
#include "defs.h"
#include "dev.h"
#include "dev_sioctl.h"
#include "dsp.h"
#include "fdpass.h"
#include "file.h"
#include "siofile.h"
#include "utils.h"
#define WATCHDOG_USEC 4000000 /* 4 seconds */
void dev_sio_onmove(void *, int);
void dev_sio_timeout(void *);
int dev_sio_pollfd(void *, struct pollfd *);
int dev_sio_revents(void *, struct pollfd *);
void dev_sio_run(void *);
void dev_sio_hup(void *);
extern struct fileops dev_sioctl_ops;
struct fileops dev_sio_ops = {
"sio",
dev_sio_pollfd,
dev_sio_revents,
dev_sio_run,
dev_sio_run,
dev_sio_hup
};
void
dev_sio_onmove(void *arg, int delta)
{
struct dev *d = arg;
#ifdef DEBUG
if (log_level >= 4) {
dev_log(d);
log_puts(": tick, delta = ");
log_puti(delta);
log_puts("\n");
}
d->sio.sum_utime += file_utime - d->sio.utime;
d->sio.sum_wtime += file_wtime - d->sio.wtime;
d->sio.wtime = file_wtime;
d->sio.utime = file_utime;
if (d->mode & MODE_PLAY)
d->sio.pused -= delta;
if (d->mode & MODE_REC)
d->sio.rused += delta;
#endif
dev_onmove(d, delta);
}
void
dev_sio_timeout(void *arg)
{
struct dev *d = arg;
dev_log(d);
log_puts(": watchdog timeout\n");
dev_abort(d);
}
/*
* open the device.
*/
int
dev_sio_open(struct dev *d)
{
struct sio_par par;
unsigned int rate, mode = d->reqmode & (SIO_PLAY | SIO_REC);
d->sio.hdl = fdpass_sio_open(d->num, mode);
if (d->sio.hdl == NULL) {
if (mode != (SIO_PLAY | SIO_REC))
return 0;
d->sio.hdl = fdpass_sio_open(d->num, SIO_PLAY);
if (d->sio.hdl != NULL)
mode = SIO_PLAY;
else {
d->sio.hdl = fdpass_sio_open(d->num, SIO_REC);
if (d->sio.hdl != NULL)
mode = SIO_REC;
else
return 0;
}
if (log_level >= 1) {
log_puts("warning, device opened in ");
log_puts(mode == SIO_PLAY ? "play-only" : "rec-only");
log_puts(" mode\n");
}
}
d->mode = mode;
d->sioctl.hdl = fdpass_sioctl_open(d->num, SIOCTL_READ | SIOCTL_WRITE);
if (d->sioctl.hdl == NULL) {
if (log_level >= 1) {
dev_log(d);
log_puts(": no control device\n");
}
}
sio_initpar(&par);
par.bits = d->par.bits;
par.bps = d->par.bps;
par.sig = d->par.sig;
par.le = d->par.le;
par.msb = d->par.msb;
if (d->mode & SIO_PLAY)
par.pchan = d->pchan;
if (d->mode & SIO_REC)
par.rchan = d->rchan;
par.appbufsz = d->bufsz;
par.round = d->round;
par.rate = d->rate;
if (!sio_setpar(d->sio.hdl, &par))
goto bad_close;
if (!sio_getpar(d->sio.hdl, &par))
goto bad_close;
/*
* If the requested rate is not supported by the device,
* use the new one, but retry using a block size that would
* match the requested one
*/
rate = par.rate;
if (rate != d->rate) {
sio_initpar(&par);
par.bits = d->par.bits;
par.bps = d->par.bps;
par.sig = d->par.sig;
par.le = d->par.le;
par.msb = d->par.msb;
if (mode & SIO_PLAY)
par.pchan = d->reqpchan;
if (mode & SIO_REC)
par.rchan = d->reqrchan;
par.appbufsz = d->bufsz * rate / d->rate;
par.round = d->round * rate / d->rate;
par.rate = rate;
if (!sio_setpar(d->sio.hdl, &par))
goto bad_close;
if (!sio_getpar(d->sio.hdl, &par))
goto bad_close;
}
#ifdef DEBUG
/*
* We support any parameter combination exposed by the kernel,
* and we have no other choice than trusting the kernel for
* returning correct parameters. But let's check parameters
* early and nicely report kernel bugs rather than crashing
* later in memset(), malloc() or alike.
*/
if (par.bits > BITS_MAX) {
dev_log(d);
log_puts(": ");
log_putu(par.bits);
log_puts(": unsupported number of bits\n");
goto bad_close;
}
if (par.bps > SIO_BPS(BITS_MAX)) {
dev_log(d);
log_puts(": ");
log_putu(par.bps);
log_puts(": unsupported sample size\n");
goto bad_close;
}
if ((d->mode & SIO_PLAY) && par.pchan > NCHAN_MAX) {
dev_log(d);
log_puts(": ");
log_putu(par.pchan);
log_puts(": unsupported number of play channels\n");
goto bad_close;
}
if ((d->mode & SIO_REC) && par.rchan > NCHAN_MAX) {
dev_log(d);
log_puts(": ");
log_putu(par.rchan);
log_puts(": unsupported number of rec channels\n");
goto bad_close;
}
if (par.bufsz == 0 || par.bufsz > RATE_MAX) {
dev_log(d);
log_puts(": ");
log_putu(par.bufsz);
log_puts(": unsupported buffer size\n");
goto bad_close;
}
if (par.round == 0 || par.round > par.bufsz ||
par.bufsz % par.round != 0) {
dev_log(d);
log_puts(": ");
log_putu(par.round);
log_puts(": unsupported block size\n");
goto bad_close;
}
if (par.rate == 0 || par.rate > RATE_MAX) {
dev_log(d);
log_puts(": ");
log_putu(par.rate);
log_puts(": unsupported rate\n");
goto bad_close;
}
#endif
d->par.bits = par.bits;
d->par.bps = par.bps;
d->par.sig = par.sig;
d->par.le = par.le;
d->par.msb = par.msb;
if (d->mode & SIO_PLAY)
d->pchan = par.pchan;
if (d->mode & SIO_REC)
d->rchan = par.rchan;
d->bufsz = par.bufsz;
d->round = par.round;
d->rate = par.rate;
if (d->mode & MODE_PLAY)
d->mode |= MODE_MON;
sio_onmove(d->sio.hdl, dev_sio_onmove, d);
d->sio.file = file_new(&dev_sio_ops, d, "dev", sio_nfds(d->sio.hdl));
if (d->sioctl.hdl) {
d->sioctl.file = file_new(&dev_sioctl_ops, d, "mix",
sioctl_nfds(d->sioctl.hdl));
}
timo_set(&d->sio.watchdog, dev_sio_timeout, d);
dev_sioctl_open(d);
return 1;
bad_close:
sio_close(d->sio.hdl);
if (d->sioctl.hdl) {
sioctl_close(d->sioctl.hdl);
d->sioctl.hdl = NULL;
}
return 0;
}
void
dev_sio_close(struct dev *d)
{
dev_sioctl_close(d);
#ifdef DEBUG
if (log_level >= 3) {
dev_log(d);
log_puts(": closed\n");
}
#endif
timo_del(&d->sio.watchdog);
file_del(d->sio.file);
sio_close(d->sio.hdl);
if (d->sioctl.hdl) {
file_del(d->sioctl.file);
sioctl_close(d->sioctl.hdl);
d->sioctl.hdl = NULL;
}
}
void
dev_sio_start(struct dev *d)
{
if (!sio_start(d->sio.hdl)) {
if (log_level >= 1) {
dev_log(d);
log_puts(": failed to start device\n");
}
return;
}
if (d->mode & MODE_PLAY) {
d->sio.cstate = DEV_SIO_CYCLE;
d->sio.todo = 0;
} else {
d->sio.cstate = DEV_SIO_READ;
d->sio.todo = d->round * d->rchan * d->par.bps;
}
#ifdef DEBUG
d->sio.pused = 0;
d->sio.rused = 0;
d->sio.sum_utime = 0;
d->sio.sum_wtime = 0;
d->sio.wtime = file_wtime;
d->sio.utime = file_utime;
if (log_level >= 3) {
dev_log(d);
log_puts(": started\n");
}
#endif
timo_add(&d->sio.watchdog, WATCHDOG_USEC);
}
void
dev_sio_stop(struct dev *d)
{
if (!sio_eof(d->sio.hdl) && !sio_flush(d->sio.hdl)) {
if (log_level >= 1) {
dev_log(d);
log_puts(": failed to stop device\n");
}
return;
}
#ifdef DEBUG
if (log_level >= 3) {
dev_log(d);
log_puts(": stopped, load avg = ");
log_puti(d->sio.sum_utime / 1000);
log_puts(" / ");
log_puti(d->sio.sum_wtime / 1000);
log_puts("\n");
}
#endif
timo_del(&d->sio.watchdog);
}
int
dev_sio_pollfd(void *arg, struct pollfd *pfd)
{
struct dev *d = arg;
int events;
events = (d->sio.cstate == DEV_SIO_READ) ? POLLIN : POLLOUT;
return sio_pollfd(d->sio.hdl, pfd, events);
}
int
dev_sio_revents(void *arg, struct pollfd *pfd)
{
struct dev *d = arg;
int events;
events = sio_revents(d->sio.hdl, pfd);
#ifdef DEBUG
d->sio.events = events;
#endif
return events;
}
void
dev_sio_run(void *arg)
{
struct dev *d = arg;
unsigned char *data, *base;
unsigned int n;
/*
* sio_read() and sio_write() would block at the end of the
* cycle so we *must* return and restart poll()'ing. Otherwise
* we may trigger dev_cycle() which would make all clients
* underrun (ex, on a play-only device)
*/
for (;;) {
if (d->pstate != DEV_RUN)
return;
switch (d->sio.cstate) {
case DEV_SIO_READ:
#ifdef DEBUG
if (!(d->sio.events & POLLIN)) {
dev_log(d);
log_puts(": recording, but POLLIN not set\n");
panic();
}
if (d->sio.todo == 0) {
dev_log(d);
log_puts(": can't read data\n");
panic();
}
if (d->prime > 0) {
dev_log(d);
log_puts(": unexpected data\n");
panic();
}
#endif
base = d->decbuf ? d->decbuf : (unsigned char *)d->rbuf;
data = base +
d->rchan * d->round * d->par.bps -
d->sio.todo;
n = sio_read(d->sio.hdl, data, d->sio.todo);
d->sio.todo -= n;
#ifdef DEBUG
if (log_level >= 4) {
dev_log(d);
log_puts(": read ");
log_putu(n);
log_puts(": bytes, todo ");
log_putu(d->sio.todo);
log_puts("/");
log_putu(d->round * d->rchan * d->par.bps);
log_puts("\n");
}
#endif
if (d->sio.todo > 0)
return;
#ifdef DEBUG
d->sio.rused -= d->round;
if (log_level >= 2) {
if (d->sio.rused >= d->round) {
dev_log(d);
log_puts(": rec hw xrun, rused = ");
log_puti(d->sio.rused);
log_puts("/");
log_puti(d->bufsz);
log_puts("\n");
}
if (d->sio.rused < 0 ||
d->sio.rused >= d->bufsz) {
dev_log(d);
log_puts(": out of bounds rused = ");
log_puti(d->sio.rused);
log_puts("/");
log_puti(d->bufsz);
log_puts("\n");
}
}
#endif
d->sio.cstate = DEV_SIO_CYCLE;
break;
case DEV_SIO_CYCLE:
timo_del(&d->sio.watchdog);
timo_add(&d->sio.watchdog, WATCHDOG_USEC);
#ifdef DEBUG
/*
* check that we're called at cycle boundary:
* either after a recorded block, or when POLLOUT is
* raised
*/
if (!((d->mode & MODE_REC) && d->prime == 0) &&
!(d->sio.events & POLLOUT)) {
dev_log(d);
log_puts(": cycle not at block boundary\n");
panic();
}
#endif
dev_cycle(d);
if (d->mode & MODE_PLAY) {
d->sio.cstate = DEV_SIO_WRITE;
d->sio.todo = d->round * d->pchan * d->par.bps;
break;
} else {
d->sio.cstate = DEV_SIO_READ;
d->sio.todo = d->round * d->rchan * d->par.bps;
return;
}
case DEV_SIO_WRITE:
#ifdef DEBUG
if (d->sio.todo == 0) {
dev_log(d);
log_puts(": can't write data\n");
panic();
}
#endif
base = d->encbuf ? d->encbuf : (unsigned char *)DEV_PBUF(d);
data = base +
d->pchan * d->round * d->par.bps -
d->sio.todo;
n = sio_write(d->sio.hdl, data, d->sio.todo);
d->sio.todo -= n;
#ifdef DEBUG
if (log_level >= 4) {
dev_log(d);
log_puts(": wrote ");
log_putu(n);
log_puts(" bytes, todo ");
log_putu(d->sio.todo);
log_puts("/");
log_putu(d->round * d->pchan * d->par.bps);
log_puts("\n");
}
#endif
if (d->sio.todo > 0)
return;
#ifdef DEBUG
d->sio.pused += d->round;
if (log_level >= 2) {
if (d->prime == 0 &&
d->sio.pused <= d->bufsz - d->round) {
dev_log(d);
log_puts(": play hw xrun, pused = ");
log_puti(d->sio.pused);
log_puts("/");
log_puti(d->bufsz);
log_puts("\n");
}
if (d->sio.pused < 0 ||
d->sio.pused > d->bufsz) {
/* device driver or libsndio bug */
dev_log(d);
log_puts(": out of bounds pused = ");
log_puti(d->sio.pused);
log_puts("/");
log_puti(d->bufsz);
log_puts("\n");
}
}
#endif
d->poffs += d->round;
if (d->poffs == d->psize)
d->poffs = 0;
if ((d->mode & MODE_REC) && d->prime == 0) {
d->sio.cstate = DEV_SIO_READ;
d->sio.todo = d->round * d->rchan * d->par.bps;
} else
d->sio.cstate = DEV_SIO_CYCLE;
return;
}
}
}
void
dev_sio_hup(void *arg)
{
struct dev *d = arg;
#ifdef DEBUG
if (log_level >= 2) {
dev_log(d);
log_puts(": disconnected\n");
}
#endif
dev_migrate(d);
dev_abort(d);
}
|