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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2025 Goran Mekić
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/event.h>
#include "oss.h"
int
main(int argc, char *argv[])
{
struct config config = {
.device = "/dev/dsp",
.mode = O_RDWR,
.format = AFMT_S32_NE,
.sample_rate = 48000,
};
struct kevent event = {};
int rc, bytes, kq;
oss_init(&config);
bytes = config.buffer_info.bytes;
if ((kq = kqueue()) < 0)
err(1, "Failed to allocate kqueue");
EV_SET(&event, config.fd, EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, 0);
if (kevent(kq, &event, 1, NULL, 0, NULL) < 0)
err(1, "Failed to register kevent");
for (;;) {
if (kevent(kq, NULL, 0, &event, 1, NULL) < 0) {
warn("Event error");
break;
}
if (event.flags & EV_ERROR) {
warn("Event error: %s", strerror(event.data));
break;
}
if ((rc = read(config.fd, config.buf, bytes)) < bytes) {
warn("Requested %d bytes, but read %d!\n", bytes, rc);
break;
}
if ((rc = write(config.fd, config.buf, bytes)) < bytes) {
warn("Requested %d bytes, but wrote %d!\n", bytes, rc);
break;
}
}
EV_SET(&event, config.fd, EVFILT_WRITE, EV_DELETE, 0, 0, 0);
if (kevent(kq, &event, 1, NULL, 0, NULL) < 0)
err(1, "Failed to unregister kevent");
close(kq);
free(config.buf);
close(config.fd);
return (0);
}
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