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 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 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 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