1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021-2022 Hans Petter Selasky
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 <stdio.h>
29 #include <stdint.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33 #include <err.h>
34 #include <sysexits.h>
35 #include <stdarg.h>
36 #include <fcntl.h>
37
38 #include "virtual_oss.h"
39
40 static void
message(const char * fmt,...)41 message(const char *fmt, ...)
42 {
43 va_list list;
44
45 va_start(list, fmt);
46 vfprintf(stderr, fmt, list);
47 va_end(list);
48 }
49
50 static void
usage(void)51 usage(void)
52 {
53 message("Usage: virtual_oss_cmd /dev/vdsp.ctl [command line arguments to pass to virtual_oss]\n");
54 exit(EX_USAGE);
55 }
56
57 int
main(int argc,char ** argv)58 main(int argc, char **argv)
59 {
60 char options[VIRTUAL_OSS_OPTIONS_MAX] = {};
61 size_t offset = 0;
62 size_t len = VIRTUAL_OSS_OPTIONS_MAX - 1;
63 int fd;
64
65 /* check if no options */
66 if (argc < 2)
67 usage();
68
69 fd = open(argv[1], O_RDWR);
70 if (fd < 0)
71 errx(EX_SOFTWARE, "Could not open '%s'", argv[1]);
72
73 for (int x = 2; x != argc; x++) {
74 size_t tmp = strlen(argv[x]) + 1;
75 if (tmp > len)
76 errx(EX_SOFTWARE, "Too many options passed");
77 memcpy(options + offset, argv[x], tmp);
78 options[offset + tmp - 1] = ' ';
79 offset += tmp;
80 len -= tmp;
81 }
82
83 if (options[0] == 0) {
84 struct virtual_oss_system_info info;
85 if (ioctl(fd, VIRTUAL_OSS_GET_SYSTEM_INFO, &info) < 0)
86 errx(EX_SOFTWARE, "Cannot get system information");
87
88 info.rx_device_name[sizeof(info.rx_device_name) - 1] = 0;
89 info.tx_device_name[sizeof(info.tx_device_name) - 1] = 0;
90
91 printf("Sample rate: %u Hz\n"
92 "Sample width: %u bits\n"
93 "Sample channels: %u\n"
94 "Output jitter: %u / %u\n"
95 "Input device name: %s\n"
96 "Output device name: %s\n",
97 info.sample_rate,
98 info.sample_bits,
99 info.sample_channels,
100 info.tx_jitter_down,
101 info.tx_jitter_up,
102 info.rx_device_name,
103 info.tx_device_name);
104 } else {
105 /* execute options */
106 if (ioctl(fd, VIRTUAL_OSS_ADD_OPTIONS, options) < 0)
107 errx(EX_SOFTWARE, "One or more invalid options");
108 /* show error, if any */
109 if (options[0] != '\0')
110 errx(EX_SOFTWARE, "%s", options);
111 }
112
113 close(fd);
114 return (0);
115 }
116