1 /*-
2 * Copyright (c) 2021-2022 Hans Petter Selasky
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include <stdio.h>
27 #include <stdint.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <err.h>
32 #include <sysexits.h>
33 #include <stdarg.h>
34 #include <fcntl.h>
35
36 #include "virtual_oss.h"
37
38 static void
message(const char * fmt,...)39 message(const char *fmt, ...)
40 {
41 va_list list;
42
43 va_start(list, fmt);
44 vfprintf(stderr, fmt, list);
45 va_end(list);
46 }
47
48 static void
usage(void)49 usage(void)
50 {
51 message("Usage: virtual_oss_cmd /dev/vdsp.ctl [command line arguments to pass to virtual_oss]\n");
52 exit(EX_USAGE);
53 }
54
55 int
main(int argc,char ** argv)56 main(int argc, char **argv)
57 {
58 char options[VIRTUAL_OSS_OPTIONS_MAX] = {};
59 size_t offset = 0;
60 size_t len = VIRTUAL_OSS_OPTIONS_MAX - 1;
61 int fd;
62
63 /* check if no options */
64 if (argc < 2)
65 usage();
66
67 fd = open(argv[1], O_RDWR);
68 if (fd < 0)
69 errx(EX_SOFTWARE, "Could not open '%s'", argv[1]);
70
71 for (int x = 2; x != argc; x++) {
72 size_t tmp = strlen(argv[x]) + 1;
73 if (tmp > len)
74 errx(EX_SOFTWARE, "Too many options passed");
75 memcpy(options + offset, argv[x], tmp);
76 options[offset + tmp - 1] = ' ';
77 offset += tmp;
78 len -= tmp;
79 }
80
81 if (options[0] == 0) {
82 struct virtual_oss_system_info info;
83 if (ioctl(fd, VIRTUAL_OSS_GET_SYSTEM_INFO, &info) < 0)
84 errx(EX_SOFTWARE, "Cannot get system information");
85
86 info.rx_device_name[sizeof(info.rx_device_name) - 1] = 0;
87 info.tx_device_name[sizeof(info.tx_device_name) - 1] = 0;
88
89 printf("Sample rate: %u Hz\n"
90 "Sample width: %u bits\n"
91 "Sample channels: %u\n"
92 "Output jitter: %u / %u\n"
93 "Input device name: %s\n"
94 "Output device name: %s\n",
95 info.sample_rate,
96 info.sample_bits,
97 info.sample_channels,
98 info.tx_jitter_down,
99 info.tx_jitter_up,
100 info.rx_device_name,
101 info.tx_device_name);
102 } else {
103 /* execute options */
104 if (ioctl(fd, VIRTUAL_OSS_ADD_OPTIONS, options) < 0)
105 errx(EX_SOFTWARE, "One or more invalid options");
106 /* show error, if any */
107 if (options[0] != '\0')
108 errx(EX_SOFTWARE, "%s", options);
109 }
110
111 close(fd);
112 return (0);
113 }
114