1 /* $NetBSD: mixerctl.c,v 1.30 2021/12/26 15:36:49 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (augustss (at) NetBSD.org) and Chuck Cranor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 33 #ifndef lint 34 __RCSID("$NetBSD: mixerctl.c,v 1.30 2021/12/26 15:36:49 rillig Exp $"); 35 #endif 36 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <fcntl.h> 40 #include <err.h> 41 #include <unistd.h> 42 #include <string.h> 43 #include <sys/types.h> 44 #include <sys/ioctl.h> 45 #include <sys/audioio.h> 46 47 #include <paths.h> 48 49 static FILE *out = stdout; 50 static int vflag = 0; 51 52 static struct field { 53 char *name; 54 mixer_ctrl_t *valp; 55 mixer_devinfo_t *infp; 56 char changed; 57 } *fields, *rfields; 58 59 static mixer_ctrl_t *values; 60 static mixer_devinfo_t *infos; 61 62 static const char mixer_path[] = _PATH_MIXER; 63 64 static char * 65 catstr(char *p, char *q) 66 { 67 char *r; 68 69 asprintf(&r, "%s.%s", p, q); 70 if (!r) 71 err(EXIT_FAILURE, "malloc"); 72 return r; 73 } 74 75 static struct field * 76 findfield(const char *name) 77 { 78 int i; 79 for (i = 0; fields[i].name; i++) 80 if (strcmp(fields[i].name, name) == 0) 81 return &fields[i]; 82 return 0; 83 } 84 85 static void 86 prfield(struct field *p, const char *sep, int prvalset) 87 { 88 mixer_ctrl_t *m; 89 int i, n; 90 91 if (sep) 92 fprintf(out, "%s%s", p->name, sep); 93 m = p->valp; 94 switch(m->type) { 95 case AUDIO_MIXER_ENUM: 96 for (i = 0; i < p->infp->un.e.num_mem; i++) 97 if (p->infp->un.e.member[i].ord == m->un.ord) 98 fprintf(out, "%s", 99 p->infp->un.e.member[i].label.name); 100 if (prvalset) { 101 fprintf(out, " [ "); 102 for (i = 0; i < p->infp->un.e.num_mem; i++) 103 fprintf(out, "%s ", 104 p->infp->un.e.member[i].label.name); 105 fprintf(out, "]"); 106 } 107 break; 108 case AUDIO_MIXER_SET: 109 for (n = i = 0; i < p->infp->un.s.num_mem; i++) 110 if (m->un.mask & p->infp->un.s.member[i].mask) 111 fprintf(out, "%s%s", n++ ? "," : "", 112 p->infp->un.s.member[i].label.name); 113 if (prvalset) { 114 fprintf(out, " { "); 115 for (i = 0; i < p->infp->un.s.num_mem; i++) 116 fprintf(out, "%s ", 117 p->infp->un.s.member[i].label.name); 118 fprintf(out, "}"); 119 } 120 break; 121 case AUDIO_MIXER_VALUE: 122 if (m->un.value.num_channels == 1) 123 fprintf(out, "%d", m->un.value.level[0]); 124 else 125 fprintf(out, "%d,%d", m->un.value.level[0], 126 m->un.value.level[1]); 127 if (prvalset) { 128 fprintf(out, " %s", p->infp->un.v.units.name); 129 if (p->infp->un.v.delta) 130 fprintf(out, " delta=%d", p->infp->un.v.delta); 131 } 132 break; 133 default: 134 printf("\n"); 135 errx(EXIT_FAILURE, "Invalid format %d", m->type); 136 } 137 } 138 139 static int 140 clip(int vol) 141 { 142 if (vol <= AUDIO_MIN_GAIN) 143 return AUDIO_MIN_GAIN; 144 if (vol >= AUDIO_MAX_GAIN) 145 return AUDIO_MAX_GAIN; 146 return vol; 147 } 148 149 static int 150 rdfield(struct field *p, char *q) 151 { 152 mixer_ctrl_t *m; 153 int v, v0, v1, mask; 154 int i; 155 char *s; 156 157 m = p->valp; 158 switch(m->type) { 159 case AUDIO_MIXER_ENUM: 160 for (i = 0; i < p->infp->un.e.num_mem; i++) 161 if (strcmp(p->infp->un.e.member[i].label.name, q) == 0) 162 break; 163 if (i < p->infp->un.e.num_mem) 164 m->un.ord = p->infp->un.e.member[i].ord; 165 else { 166 warnx("Bad enum value %s", q); 167 return 0; 168 } 169 break; 170 case AUDIO_MIXER_SET: 171 mask = 0; 172 for (v = 0; q && *q; q = s) { 173 s = strchr(q, ','); 174 if (s) 175 *s++ = 0; 176 for (i = 0; i < p->infp->un.s.num_mem; i++) 177 if (strcmp(p->infp->un.s.member[i].label.name, 178 q) == 0) 179 break; 180 if (i < p->infp->un.s.num_mem) { 181 mask |= p->infp->un.s.member[i].mask; 182 } else { 183 warnx("Bad set value %s", q); 184 return 0; 185 } 186 } 187 m->un.mask = mask; 188 break; 189 case AUDIO_MIXER_VALUE: 190 if (m->un.value.num_channels == 1) { 191 if (sscanf(q, "%d", &v) == 1) { 192 m->un.value.level[0] = clip(v); 193 } else { 194 warnx("Bad number %s", q); 195 return 0; 196 } 197 } else { 198 if (sscanf(q, "%d,%d", &v0, &v1) == 2) { 199 m->un.value.level[0] = clip(v0); 200 m->un.value.level[1] = clip(v1); 201 } else if (sscanf(q, "%d", &v) == 1) { 202 m->un.value.level[0] = 203 m->un.value.level[1] = clip(v); 204 } else { 205 warnx("Bad numbers %s", q); 206 return 0; 207 } 208 } 209 break; 210 default: 211 errx(EXIT_FAILURE, "Invalid format %d", m->type); 212 } 213 p->changed = 1; 214 return 1; 215 } 216 217 static int 218 incfield(struct field *p, int inc) 219 { 220 mixer_ctrl_t *m; 221 int i, v; 222 223 m = p->valp; 224 switch(m->type) { 225 case AUDIO_MIXER_ENUM: 226 m->un.ord += inc; 227 if (m->un.ord < 0) 228 m->un.ord = p->infp->un.e.num_mem - 1; 229 if (m->un.ord >= p->infp->un.e.num_mem) 230 m->un.ord = 0; 231 break; 232 case AUDIO_MIXER_SET: 233 m->un.mask += inc; 234 if (m->un.mask < 0) 235 m->un.mask = (1 << p->infp->un.s.num_mem) - 1; 236 if (m->un.mask >= (1 << p->infp->un.s.num_mem)) 237 m->un.mask = 0; 238 warnx("Can't ++/-- %s", p->name); 239 return 0; 240 case AUDIO_MIXER_VALUE: 241 if (p->infp->un.v.delta) 242 inc *= p->infp->un.v.delta; 243 for (i = 0; i < m->un.value.num_channels; i++) { 244 v = m->un.value.level[i]; 245 v += inc; 246 m->un.value.level[i] = clip(v); 247 } 248 break; 249 default: 250 errx(EXIT_FAILURE, "Invalid format %d", m->type); 251 } 252 p->changed = 1; 253 return 1; 254 } 255 256 static void 257 wrarg(int fd, char *arg, const char *sep) 258 { 259 char *q; 260 struct field *p; 261 mixer_ctrl_t val; 262 int incdec, r; 263 264 q = strchr(arg, '='); 265 if (q == NULL) { 266 int l = strlen(arg); 267 incdec = 0; 268 if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+') 269 incdec = 1; 270 else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-') 271 incdec = -1; 272 else { 273 warnx("No `=' in %s", arg); 274 return; 275 } 276 arg[l-2] = 0; 277 } else if (q > arg && (*(q-1) == '+' || *(q-1) == '-')) { 278 if (sscanf(q+1, "%d", &incdec) != 1) { 279 warnx("Bad number %s", q+1); 280 return; 281 } 282 if (*(q-1) == '-') 283 incdec *= -1; 284 *(q-1) = 0; 285 q = NULL; 286 } else 287 *q++ = 0; 288 289 p = findfield(arg); 290 if (p == NULL) { 291 warnx("field %s does not exist", arg); 292 return; 293 } 294 295 val = *p->valp; 296 if (q != NULL) 297 r = rdfield(p, q); 298 else 299 r = incfield(p, incdec); 300 if (r) { 301 if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) == -1) 302 warn("AUDIO_MIXER_WRITE"); 303 else if (sep) { 304 *p->valp = val; 305 prfield(p, ": ", 0); 306 if (ioctl(fd, AUDIO_MIXER_READ, p->valp) == -1) 307 warn("AUDIO_MIXER_READ"); 308 printf(" -> "); 309 prfield(p, 0, 0); 310 printf("\n"); 311 } 312 } 313 } 314 315 static void 316 prarg(int fd, char *arg, const char *sep) 317 { 318 struct field *p; 319 320 p = findfield(arg); 321 if (p == NULL) 322 warnx("field %s does not exist", arg); 323 else 324 prfield(p, sep, vflag), fprintf(out, "\n"); 325 } 326 327 static inline void __dead 328 usage(void) 329 { 330 const char *prog = getprogname(); 331 332 fprintf(stderr, "Usage:\t%s [-d file] [-v] [-n] name ...\n", prog); 333 fprintf(stderr, "\t%s [-d file] [-v] [-n] -w name=value ...\n", prog); 334 fprintf(stderr, "\t%s [-d file] [-v] [-n] -a\n", prog); 335 exit(EXIT_FAILURE); 336 } 337 338 int 339 main(int argc, char **argv) 340 { 341 int fd, i, j, ch, pos; 342 int aflag = 0, wflag = 0; 343 const char *file; 344 const char *sep = "="; 345 mixer_devinfo_t dinfo; 346 int ndev; 347 348 file = getenv("MIXERDEVICE"); 349 if (file == NULL) 350 file = mixer_path; 351 352 353 while ((ch = getopt(argc, argv, "ad:f:nvw")) != -1) { 354 switch(ch) { 355 case 'a': 356 aflag++; 357 break; 358 case 'w': 359 wflag++; 360 break; 361 case 'v': 362 vflag++; 363 break; 364 case 'n': 365 sep = 0; 366 break; 367 case 'f': /* compatibility */ 368 case 'd': 369 file = optarg; 370 break; 371 case '?': 372 default: 373 usage(); 374 } 375 } 376 argc -= optind; 377 argv += optind; 378 379 if (aflag ? (argc != 0 || wflag) : argc == 0) 380 usage(); 381 382 fd = open(file, O_RDWR); 383 /* Try with mixer0 but only if using the default device. */ 384 if (fd == -1 && file == mixer_path) { 385 file = _PATH_MIXER0; 386 fd = open(file, O_RDWR); 387 } 388 389 if (fd == -1) 390 err(EXIT_FAILURE, "Can't open `%s'", file); 391 392 for (ndev = 0; ; ndev++) { 393 dinfo.index = ndev; 394 if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) == -1) 395 break; 396 } 397 rfields = calloc(ndev, sizeof *rfields); 398 fields = calloc(ndev, sizeof *fields); 399 infos = calloc(ndev, sizeof *infos); 400 values = calloc(ndev, sizeof *values); 401 402 for (i = 0; i < ndev; i++) { 403 infos[i].index = i; 404 if (ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]) == -1) 405 warn("AUDIO_MIXER_DEVINFO for %d", i); 406 } 407 408 for (i = 0; i < ndev; i++) { 409 rfields[i].name = infos[i].label.name; 410 rfields[i].valp = &values[i]; 411 rfields[i].infp = &infos[i]; 412 } 413 414 for (i = 0; i < ndev; i++) { 415 values[i].dev = i; 416 values[i].type = infos[i].type; 417 if (infos[i].type != AUDIO_MIXER_CLASS) { 418 values[i].un.value.num_channels = 2; 419 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) == -1) { 420 values[i].un.value.num_channels = 1; 421 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) 422 == -1) 423 err(EXIT_FAILURE, "AUDIO_MIXER_READ"); 424 } 425 } 426 } 427 428 for (j = i = 0; i < ndev; i++) { 429 if (infos[i].type != AUDIO_MIXER_CLASS && 430 infos[i].type != -1) { 431 fields[j++] = rfields[i]; 432 for (pos = infos[i].next; pos != AUDIO_MIXER_LAST; 433 pos = infos[pos].next) { 434 fields[j] = rfields[pos]; 435 fields[j].name = catstr(rfields[i].name, 436 infos[pos].label.name); 437 infos[pos].type = -1; 438 j++; 439 } 440 } 441 } 442 443 for (i = 0; i < j; i++) { 444 int cls = fields[i].infp->mixer_class; 445 if (cls >= 0 && cls < ndev) 446 fields[i].name = catstr(infos[cls].label.name, 447 fields[i].name); 448 } 449 450 if (argc == 0 && aflag && !wflag) { 451 for (i = 0; i < j; i++) { 452 prfield(&fields[i], sep, vflag); 453 fprintf(out, "\n"); 454 } 455 } else if (argc > 0 && !aflag) { 456 while (argc--) { 457 if (wflag) 458 wrarg(fd, *argv, sep); 459 else 460 prarg(fd, *argv, sep); 461 argv++; 462 } 463 } else 464 usage(); 465 return EXIT_SUCCESS; 466 } 467
Indexes created Sun Sep 21 15:09:59 GMT 2025