1 /* $NetBSD: mixerctl.c,v 1.17 2002/01/31 00:03:24 augustss 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@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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <fcntl.h> 41 #include <err.h> 42 #include <unistd.h> 43 #include <string.h> 44 #include <sys/types.h> 45 #include <sys/ioctl.h> 46 #include <sys/audioio.h> 47 48 #include <paths.h> 49 50 FILE *out = stdout; 51 int vflag = 0; 52 53 char *prog; 54 55 struct field { 56 char *name; 57 mixer_ctrl_t *valp; 58 mixer_devinfo_t *infp; 59 char changed; 60 } *fields, *rfields; 61 62 mixer_ctrl_t *values; 63 mixer_devinfo_t *infos; 64 65 static char * 66 catstr(char *p, char *q) 67 { 68 char *r = malloc(strlen(p) + strlen(q) + 2); 69 strcpy(r, p); 70 strcat(r, "."); 71 strcat(r, q); 72 return r; 73 } 74 75 static struct field * 76 findfield(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, 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(1, "Invalid format."); 136 } 137 } 138 139 static int 140 rdfield(struct field *p, char *q) 141 { 142 mixer_ctrl_t *m; 143 int v, v0, v1, mask; 144 int i; 145 char *s; 146 147 m = p->valp; 148 switch(m->type) { 149 case AUDIO_MIXER_ENUM: 150 for(i = 0; i < p->infp->un.e.num_mem; i++) 151 if (strcmp(p->infp->un.e.member[i].label.name, q) == 0) 152 break; 153 if (i < p->infp->un.e.num_mem) 154 m->un.ord = p->infp->un.e.member[i].ord; 155 else { 156 warnx("Bad enum value %s", q); 157 return 0; 158 } 159 break; 160 case AUDIO_MIXER_SET: 161 mask = 0; 162 for(v = 0; q && *q; q = s) { 163 s = strchr(q, ','); 164 if (s) 165 *s++ = 0; 166 for(i = 0; i < p->infp->un.s.num_mem; i++) 167 if (strcmp(p->infp->un.s.member[i].label.name, 168 q) == 0) 169 break; 170 if (i < p->infp->un.s.num_mem) { 171 mask |= p->infp->un.s.member[i].mask; 172 } else { 173 warnx("Bad set value %s", q); 174 return 0; 175 } 176 } 177 m->un.mask = mask; 178 break; 179 case AUDIO_MIXER_VALUE: 180 if (m->un.value.num_channels == 1) { 181 if (sscanf(q, "%d", &v) == 1) { 182 m->un.value.level[0] = v; 183 } else { 184 warnx("Bad number %s", q); 185 return 0; 186 } 187 } else { 188 if (sscanf(q, "%d,%d", &v0, &v1) == 2) { 189 m->un.value.level[0] = v0; 190 m->un.value.level[1] = v1; 191 } else if (sscanf(q, "%d", &v) == 1) { 192 m->un.value.level[0] = m->un.value.level[1] = v; 193 } else { 194 warnx("Bad numbers %s", q); 195 return 0; 196 } 197 } 198 break; 199 default: 200 errx(1, "Invalid format."); 201 } 202 p->changed = 1; 203 return 1; 204 } 205 206 static int 207 incfield(struct field *p, int inc) 208 { 209 mixer_ctrl_t *m; 210 int i, v; 211 212 m = p->valp; 213 switch(m->type) { 214 case AUDIO_MIXER_ENUM: 215 m->un.ord += inc; 216 if (m->un.ord < 0) 217 m->un.ord = p->infp->un.e.num_mem-1; 218 if (m->un.ord >= p->infp->un.e.num_mem) 219 m->un.ord = 0; 220 break; 221 case AUDIO_MIXER_SET: 222 m->un.mask += inc; 223 if (m->un.mask < 0) 224 m->un.mask = (1 << p->infp->un.s.num_mem) - 1; 225 if (m->un.mask >= (1 << p->infp->un.s.num_mem)) 226 m->un.mask = 0; 227 warnx("Can't ++/-- %s", p->name); 228 return 0; 229 case AUDIO_MIXER_VALUE: 230 if (p->infp->un.v.delta) 231 inc *= p->infp->un.v.delta; 232 for (i = 0; i < m->un.value.num_channels; i++) { 233 v = m->un.value.level[i]; 234 v += inc; 235 if (v < AUDIO_MIN_GAIN) 236 v = AUDIO_MIN_GAIN; 237 if (v > AUDIO_MAX_GAIN) 238 v = AUDIO_MAX_GAIN; 239 m->un.value.level[i] = v; 240 } 241 break; 242 default: 243 errx(1, "Invalid format."); 244 } 245 p->changed = 1; 246 return 1; 247 } 248 249 static void 250 wrarg(int fd, char *arg, char *sep) 251 { 252 char *q; 253 struct field *p; 254 mixer_ctrl_t val; 255 int incdec, r; 256 257 q = strchr(arg, '='); 258 if (q == NULL) { 259 int l = strlen(arg); 260 incdec = 0; 261 if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+') 262 incdec = 1; 263 else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-') 264 incdec = -1; 265 else { 266 warnx("No `=' in %s", arg); 267 return; 268 } 269 arg[l-2] = 0; 270 } else 271 *q++ = 0; 272 273 p = findfield(arg); 274 if (p == NULL) { 275 warnx("field %s does not exist", arg); 276 return; 277 } 278 279 val = *p->valp; 280 if (q != NULL) 281 r = rdfield(p, q); 282 else 283 r = incfield(p, incdec); 284 if (r) { 285 if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) < 0) 286 warn("AUDIO_MIXER_WRITE"); 287 else if (sep) { 288 *p->valp = val; 289 prfield(p, ": ", 0); 290 ioctl(fd, AUDIO_MIXER_READ, p->valp); 291 printf(" -> "); 292 prfield(p, 0, 0); 293 printf("\n"); 294 } 295 } 296 } 297 298 static void 299 prarg(int fd, char *arg, char *sep) 300 { 301 struct field *p; 302 303 p = findfield(arg); 304 if (p == NULL) 305 warnx("field %s does not exist", arg); 306 else 307 prfield(p, sep, vflag), fprintf(out, "\n"); 308 } 309 310 int 311 main(int argc, char **argv) 312 { 313 int fd, i, j, ch, pos; 314 int aflag = 0, wflag = 0; 315 char *file; 316 char *sep = "="; 317 mixer_devinfo_t dinfo; 318 int ndev; 319 320 file = getenv("MIXERDEVICE"); 321 if (file == NULL) 322 file = _PATH_MIXER; 323 324 prog = *argv; 325 326 while ((ch = getopt(argc, argv, "ad:f:nvw")) != -1) { 327 switch(ch) { 328 case 'a': 329 aflag++; 330 break; 331 case 'w': 332 wflag++; 333 break; 334 case 'v': 335 vflag++; 336 break; 337 case 'n': 338 sep = 0; 339 break; 340 case 'f': /* compatibility */ 341 case 'd': 342 file = optarg; 343 break; 344 case '?': 345 default: 346 usage: 347 fprintf(out, "%s [-d file] [-v] [-n] name ...\n", prog); 348 fprintf(out, "%s [-d file] [-v] [-n] -w name=value ...\n",prog); 349 fprintf(out, "%s [-d file] [-v] [-n] -a\n", prog); 350 exit(0); 351 } 352 } 353 argc -= optind; 354 argv += optind; 355 356 fd = open(file, O_RDWR); 357 /* Try with mixer0. */ 358 if (fd < 0 && file == _PATH_MIXER) { 359 file = _PATH_MIXER0; 360 fd = open(file, O_RDWR); 361 } 362 363 if (fd < 0) 364 err(1, "%s", file); 365 366 for(ndev = 0; ; ndev++) { 367 dinfo.index = ndev; 368 if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) < 0) 369 break; 370 } 371 rfields = calloc(ndev, sizeof *rfields); 372 fields = calloc(ndev, sizeof *fields); 373 infos = calloc(ndev, sizeof *infos); 374 values = calloc(ndev, sizeof *values); 375 376 for(i = 0; i < ndev; i++) { 377 infos[i].index = i; 378 ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]); 379 } 380 381 for(i = 0; i < ndev; i++) { 382 rfields[i].name = infos[i].label.name; 383 rfields[i].valp = &values[i]; 384 rfields[i].infp = &infos[i]; 385 } 386 387 for(i = 0; i < ndev; i++) { 388 values[i].dev = i; 389 values[i].type = infos[i].type; 390 if (infos[i].type != AUDIO_MIXER_CLASS) { 391 values[i].un.value.num_channels = 2; 392 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0) { 393 values[i].un.value.num_channels = 1; 394 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0) 395 err(1, "AUDIO_MIXER_READ"); 396 } 397 } 398 } 399 400 for(j = i = 0; i < ndev; i++) { 401 if (infos[i].type != AUDIO_MIXER_CLASS && 402 infos[i].type != -1) { 403 fields[j++] = rfields[i]; 404 for(pos = infos[i].next; pos != AUDIO_MIXER_LAST; 405 pos = infos[pos].next) { 406 fields[j] = rfields[pos]; 407 fields[j].name = catstr(rfields[i].name, 408 infos[pos].label.name); 409 infos[pos].type = -1; 410 j++; 411 } 412 } 413 } 414 415 for(i = 0; i < j; i++) { 416 int cls = fields[i].infp->mixer_class; 417 if (cls >= 0 && cls < ndev) 418 fields[i].name = catstr(infos[cls].label.name, 419 fields[i].name); 420 } 421 422 if (argc == 0 && aflag && !wflag) { 423 for(i = 0; fields[i].name; i++) { 424 prfield(&fields[i], sep, vflag); 425 fprintf(out, "\n"); 426 } 427 } else if (argc > 0 && !aflag) { 428 while(argc--) { 429 if (wflag) 430 wrarg(fd, *argv, sep); 431 else 432 prarg(fd, *argv, sep); 433 argv++; 434 } 435 } else 436 goto usage; 437 exit(0); 438 } 439