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