1*6a569666SGoran Mekić /*
2*6a569666SGoran Mekić * SPDX-License-Identifier: BSD-2-Clause
3*6a569666SGoran Mekić *
4*6a569666SGoran Mekić * Copyright (c) 2025 Goran Mekić
5*6a569666SGoran Mekić *
6*6a569666SGoran Mekić * Redistribution and use in source and binary forms, with or without
7*6a569666SGoran Mekić * modification, are permitted provided that the following conditions
8*6a569666SGoran Mekić * are met:
9*6a569666SGoran Mekić * 1. Redistributions of source code must retain the above copyright
10*6a569666SGoran Mekić * notice, this list of conditions and the following disclaimer.
11*6a569666SGoran Mekić * 2. Redistributions in binary form must reproduce the above copyright
12*6a569666SGoran Mekić * notice, this list of conditions and the following disclaimer in the
13*6a569666SGoran Mekić * documentation and/or other materials provided with the distribution.
14*6a569666SGoran Mekić *
15*6a569666SGoran Mekić * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16*6a569666SGoran Mekić * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17*6a569666SGoran Mekić * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18*6a569666SGoran Mekić * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19*6a569666SGoran Mekić * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20*6a569666SGoran Mekić * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21*6a569666SGoran Mekić * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22*6a569666SGoran Mekić * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23*6a569666SGoran Mekić * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24*6a569666SGoran Mekić * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25*6a569666SGoran Mekić * SUCH DAMAGE.
26*6a569666SGoran Mekić */
27*6a569666SGoran Mekić
28*6a569666SGoran Mekić #include <sys/event.h>
29*6a569666SGoran Mekić
30*6a569666SGoran Mekić #include "oss.h"
31*6a569666SGoran Mekić
32*6a569666SGoran Mekić int
main(int argc,char * argv[])33*6a569666SGoran Mekić main(int argc, char *argv[])
34*6a569666SGoran Mekić {
35*6a569666SGoran Mekić struct config config = {
36*6a569666SGoran Mekić .device = "/dev/dsp",
37*6a569666SGoran Mekić .mode = O_RDWR,
38*6a569666SGoran Mekić .format = AFMT_S32_NE,
39*6a569666SGoran Mekić .sample_rate = 48000,
40*6a569666SGoran Mekić };
41*6a569666SGoran Mekić struct kevent event = {};
42*6a569666SGoran Mekić int rc, bytes, kq;
43*6a569666SGoran Mekić
44*6a569666SGoran Mekić oss_init(&config);
45*6a569666SGoran Mekić bytes = config.buffer_info.bytes;
46*6a569666SGoran Mekić
47*6a569666SGoran Mekić if ((kq = kqueue()) < 0)
48*6a569666SGoran Mekić err(1, "Failed to allocate kqueue");
49*6a569666SGoran Mekić EV_SET(&event, config.fd, EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, 0);
50*6a569666SGoran Mekić if (kevent(kq, &event, 1, NULL, 0, NULL) < 0)
51*6a569666SGoran Mekić err(1, "Failed to register kevent");
52*6a569666SGoran Mekić for (;;) {
53*6a569666SGoran Mekić if (kevent(kq, NULL, 0, &event, 1, NULL) < 0) {
54*6a569666SGoran Mekić warn("Event error");
55*6a569666SGoran Mekić break;
56*6a569666SGoran Mekić }
57*6a569666SGoran Mekić if (event.flags & EV_ERROR) {
58*6a569666SGoran Mekić warn("Event error: %s", strerror(event.data));
59*6a569666SGoran Mekić break;
60*6a569666SGoran Mekić }
61*6a569666SGoran Mekić if ((rc = read(config.fd, config.buf, bytes)) < bytes) {
62*6a569666SGoran Mekić warn("Requested %d bytes, but read %d!\n", bytes, rc);
63*6a569666SGoran Mekić break;
64*6a569666SGoran Mekić }
65*6a569666SGoran Mekić if ((rc = write(config.fd, config.buf, bytes)) < bytes) {
66*6a569666SGoran Mekić warn("Requested %d bytes, but wrote %d!\n", bytes, rc);
67*6a569666SGoran Mekić break;
68*6a569666SGoran Mekić }
69*6a569666SGoran Mekić }
70*6a569666SGoran Mekić EV_SET(&event, config.fd, EVFILT_WRITE, EV_DELETE, 0, 0, 0);
71*6a569666SGoran Mekić if (kevent(kq, &event, 1, NULL, 0, NULL) < 0)
72*6a569666SGoran Mekić err(1, "Failed to unregister kevent");
73*6a569666SGoran Mekić close(kq);
74*6a569666SGoran Mekić
75*6a569666SGoran Mekić free(config.buf);
76*6a569666SGoran Mekić close(config.fd);
77*6a569666SGoran Mekić
78*6a569666SGoran Mekić return (0);
79*6a569666SGoran Mekić }
80