Blob
Date:
Fri Jun 10 07:57:19 2022 UTC
Message:
don't sio_start if we're not stopped
/*
* Copyright (c) 2022 Omar Polo <op@openbsd.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/types.h>
#include <sys/queue.h>
#include <sys/uio.h>
#include <limits.h>
#include <assert.h>
#include <errno.h>
#include <event.h>
#include <poll.h>
#include <signal.h>
#include <sndio.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <imsg.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "amused.h"
#include "log.h"
#include "xmalloc.h"
struct sio_hdl *hdl;
struct pollfd *player_pfds;
static struct imsgbuf *ibuf;
static int stopped = 1;
static int nextfd = -1;
volatile sig_atomic_t halted;
void
player_signal_handler(int signo)
{
halted = 1;
}
int
player_setup(int bits, int rate, int channels)
{
static struct sio_par par;
int nfds, fpct;
log_debug("%s: bits=%d, rate=%d, channels=%d", __func__,
bits, rate, channels);
fpct = (rate*5)/100;
/* don't stop if the parameters are the same */
if (bits == par.bits && channels == par.pchan &&
par.rate - fpct <= rate && rate <= par.rate + fpct) {
if (stopped)
goto start;
return 0;
}
again:
if (!stopped) {
sio_stop(hdl);
stopped = 1;
}
sio_initpar(&par);
par.bits = bits;
par.rate = rate;
par.pchan = channels;
if (!sio_setpar(hdl, &par)) {
if (errno == EAGAIN) {
nfds = sio_pollfd(hdl, player_pfds + 1, POLLOUT);
if (poll(player_pfds + 1, nfds, INFTIM) == -1)
fatal("poll");
goto again;
}
log_warnx("invalid params (bits=%d, rate=%d, channels=%d",
bits, rate, channels);
return -1;
}
if (!sio_getpar(hdl, &par)) {
log_warnx("can't get params");
return -1;
}
if (par.bits != bits || par.pchan != channels) {
log_warnx("failed to set params");
return -1;
}
/* TODO: check the sample rate? */
start:
if (!sio_start(hdl)) {
log_warn("sio_start");
return -1;
}
stopped = 0;
return 0;
}
/* process only one message */
int
player_dispatch(void)
{
struct pollfd pfd;
struct imsg imsg;
ssize_t n;
int ret;
if (halted != 0)
return IMSG_STOP;
again:
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("imsg_get");
if (n == 0) {
pfd.fd = ibuf->fd;
pfd.events = POLLIN;
if (poll(&pfd, 1, INFTIM) == -1)
fatal("poll");
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read");
if (n == 0)
fatalx("pipe closed");
goto again;
}
ret = imsg.hdr.type;
switch (imsg.hdr.type) {
case IMSG_PLAY:
if (nextfd != -1)
fatalx("track already enqueued");
if ((nextfd = imsg.fd) == -1)
fatalx("%s: got invalid file descriptor", __func__);
log_debug("song enqueued");
ret = IMSG_STOP;
break;
case IMSG_RESUME:
case IMSG_PAUSE:
case IMSG_STOP:
break;
default:
fatalx("unknown imsg %d", imsg.hdr.type);
}
imsg_free(&imsg);
return ret;
}
void
player_senderr(void)
{
imsg_compose(ibuf, IMSG_ERR, 0, 0, -1, NULL, 0);
imsg_flush(ibuf);
}
void
player_sendeof(void)
{
imsg_compose(ibuf, IMSG_EOF, 0, 0, -1, NULL, 0);
imsg_flush(ibuf);
}
int
player_playnext(void)
{
static char buf[512];
ssize_t r;
int fd = nextfd;
assert(nextfd != -1);
nextfd = -1;
r = read(fd, buf, sizeof(buf));
/* 8 byte is the larger magic number */
if (r < 8) {
log_warn("read failed");
goto err;
}
if (lseek(fd, 0, SEEK_SET) == -1) {
log_warn("lseek failed");
goto err;
}
if (memcmp(buf, "fLaC", 4) == 0)
return play_flac(fd);
if (memcmp(buf, "ID3", 3) == 0 ||
memcmp(buf, "\xFF\xFB", 2) == 0)
return play_mp3(fd);
if (memmem(buf, r, "OpusHead", 8) != NULL)
return play_opus(fd);
if (memmem(buf, r, "OggS", 4) != NULL)
return play_oggvorbis(fd);
log_warnx("unknown file type");
err:
close(fd);
return -1;
}
int
player_pause(void)
{
int r;
r = player_dispatch();
return r == IMSG_RESUME;
}
int
player_shouldstop(void)
{
switch (player_dispatch()) {
case IMSG_PAUSE:
if (player_pause())
break;
/* fallthrough */
case IMSG_STOP:
return 1;
}
return 0;
}
int
play(const void *buf, size_t len)
{
size_t w;
int nfds, revents, r;
while (len != 0) {
nfds = sio_pollfd(hdl, player_pfds + 1, POLLOUT);
r = poll(player_pfds, nfds + 1, INFTIM);
if (r == -1)
fatal("poll");
if (player_pfds[0].revents & (POLLHUP|POLLIN)) {
if (player_shouldstop()) {
sio_flush(hdl);
stopped = 1;
return 0;
}
}
revents = sio_revents(hdl, player_pfds + 1);
if (revents & POLLHUP)
fatalx("sndio hang-up");
if (revents & POLLOUT) {
w = sio_write(hdl, buf, len);
len -= w;
buf += w;
}
}
return 1;
}
int
player(int debug, int verbose)
{
int r;
log_init(debug, LOG_DAEMON);
log_setverbose(verbose);
setproctitle("player");
log_procinit("player");
#if 0
{
static int attached;
while (!attached)
sleep(1);
}
#endif
if ((hdl = sio_open(SIO_DEVANY, SIO_PLAY, 1)) == NULL)
fatal("sio_open");
/* allocate one extra for imsg */
player_pfds = calloc(sio_nfds(hdl) + 1, sizeof(*player_pfds));
if (player_pfds == NULL)
fatal("calloc");
player_pfds[0].events = POLLIN;
player_pfds[0].fd = 3;
ibuf = xmalloc(sizeof(*ibuf));
imsg_init(ibuf, 3);
signal(SIGINT, player_signal_handler);
signal(SIGTERM, player_signal_handler);
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
if (pledge("stdio recvfd audio", NULL) == -1)
fatal("pledge");
while (!halted) {
while (nextfd == -1)
player_dispatch();
r = player_playnext();
if (r == -1)
player_senderr();
if (r == 0)
player_sendeof();
}
return 0;
}
Omar Polo