mixerctl.c revision 1.28 1 /* $NetBSD: mixerctl.c,v 1.28 2021/12/17 13:42:06 christos 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 1.28 2021/12/17 13:42:06 christos 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 FILE *out = stdout;
50 int vflag = 0;
51
52 char *prog;
53
54 struct field {
55 char *name;
56 mixer_ctrl_t *valp;
57 mixer_devinfo_t *infp;
58 char changed;
59 } *fields, *rfields;
60
61 mixer_ctrl_t *values;
62 mixer_devinfo_t *infos;
63
64 static const char mixer_path[] = _PATH_MIXER;
65
66 static char *
67 catstr(char *p, char *q)
68 {
69 char *r;
70
71 asprintf(&r, "%s.%s", p, q);
72 if (!r)
73 err(1, "malloc");
74 return r;
75 }
76
77 static struct field *
78 findfield(char *name)
79 {
80 int i;
81 for (i = 0; fields[i].name; i++)
82 if (strcmp(fields[i].name, name) == 0)
83 return &fields[i];
84 return 0;
85 }
86
87 static void
88 prfield(struct field *p, const char *sep, int prvalset)
89 {
90 mixer_ctrl_t *m;
91 int i, n;
92
93 if (sep)
94 fprintf(out, "%s%s", p->name, sep);
95 m = p->valp;
96 switch(m->type) {
97 case AUDIO_MIXER_ENUM:
98 for (i = 0; i < p->infp->un.e.num_mem; i++)
99 if (p->infp->un.e.member[i].ord == m->un.ord)
100 fprintf(out, "%s",
101 p->infp->un.e.member[i].label.name);
102 if (prvalset) {
103 fprintf(out, " [ ");
104 for (i = 0; i < p->infp->un.e.num_mem; i++)
105 fprintf(out, "%s ",
106 p->infp->un.e.member[i].label.name);
107 fprintf(out, "]");
108 }
109 break;
110 case AUDIO_MIXER_SET:
111 for (n = i = 0; i < p->infp->un.s.num_mem; i++)
112 if (m->un.mask & p->infp->un.s.member[i].mask)
113 fprintf(out, "%s%s", n++ ? "," : "",
114 p->infp->un.s.member[i].label.name);
115 if (prvalset) {
116 fprintf(out, " { ");
117 for (i = 0; i < p->infp->un.s.num_mem; i++)
118 fprintf(out, "%s ",
119 p->infp->un.s.member[i].label.name);
120 fprintf(out, "}");
121 }
122 break;
123 case AUDIO_MIXER_VALUE:
124 if (m->un.value.num_channels == 1)
125 fprintf(out, "%d", m->un.value.level[0]);
126 else
127 fprintf(out, "%d,%d", m->un.value.level[0],
128 m->un.value.level[1]);
129 if (prvalset) {
130 fprintf(out, " %s", p->infp->un.v.units.name);
131 if (p->infp->un.v.delta)
132 fprintf(out, " delta=%d", p->infp->un.v.delta);
133 }
134 break;
135 default:
136 printf("\n");
137 errx(1, "Invalid format.");
138 }
139 }
140
141 static int
142 clip(int vol)
143 {
144 if (vol <= AUDIO_MIN_GAIN)
145 return AUDIO_MIN_GAIN;
146 if (vol >= AUDIO_MAX_GAIN)
147 return AUDIO_MAX_GAIN;
148 return vol;
149 }
150
151 static int
152 rdfield(struct field *p, char *q)
153 {
154 mixer_ctrl_t *m;
155 int v, v0, v1, mask;
156 int i;
157 char *s;
158
159 m = p->valp;
160 switch(m->type) {
161 case AUDIO_MIXER_ENUM:
162 for (i = 0; i < p->infp->un.e.num_mem; i++)
163 if (strcmp(p->infp->un.e.member[i].label.name, q) == 0)
164 break;
165 if (i < p->infp->un.e.num_mem)
166 m->un.ord = p->infp->un.e.member[i].ord;
167 else {
168 warnx("Bad enum value %s", q);
169 return 0;
170 }
171 break;
172 case AUDIO_MIXER_SET:
173 mask = 0;
174 for (v = 0; q && *q; q = s) {
175 s = strchr(q, ',');
176 if (s)
177 *s++ = 0;
178 for (i = 0; i < p->infp->un.s.num_mem; i++)
179 if (strcmp(p->infp->un.s.member[i].label.name,
180 q) == 0)
181 break;
182 if (i < p->infp->un.s.num_mem) {
183 mask |= p->infp->un.s.member[i].mask;
184 } else {
185 warnx("Bad set value %s", q);
186 return 0;
187 }
188 }
189 m->un.mask = mask;
190 break;
191 case AUDIO_MIXER_VALUE:
192 if (m->un.value.num_channels == 1) {
193 if (sscanf(q, "%d", &v) == 1) {
194 m->un.value.level[0] = clip(v);
195 } else {
196 warnx("Bad number %s", q);
197 return 0;
198 }
199 } else {
200 if (sscanf(q, "%d,%d", &v0, &v1) == 2) {
201 m->un.value.level[0] = clip(v0);
202 m->un.value.level[1] = clip(v1);
203 } else if (sscanf(q, "%d", &v) == 1) {
204 m->un.value.level[0] =
205 m->un.value.level[1] = clip(v);
206 } else {
207 warnx("Bad numbers %s", q);
208 return 0;
209 }
210 }
211 break;
212 default:
213 errx(1, "Invalid format.");
214 }
215 p->changed = 1;
216 return 1;
217 }
218
219 static int
220 incfield(struct field *p, int inc)
221 {
222 mixer_ctrl_t *m;
223 int i, v;
224
225 m = p->valp;
226 switch(m->type) {
227 case AUDIO_MIXER_ENUM:
228 m->un.ord += inc;
229 if (m->un.ord < 0)
230 m->un.ord = p->infp->un.e.num_mem - 1;
231 if (m->un.ord >= p->infp->un.e.num_mem)
232 m->un.ord = 0;
233 break;
234 case AUDIO_MIXER_SET:
235 m->un.mask += inc;
236 if (m->un.mask < 0)
237 m->un.mask = (1 << p->infp->un.s.num_mem) - 1;
238 if (m->un.mask >= (1 << p->infp->un.s.num_mem))
239 m->un.mask = 0;
240 warnx("Can't ++/-- %s", p->name);
241 return 0;
242 case AUDIO_MIXER_VALUE:
243 if (p->infp->un.v.delta)
244 inc *= p->infp->un.v.delta;
245 for (i = 0; i < m->un.value.num_channels; i++) {
246 v = m->un.value.level[i];
247 v += inc;
248 m->un.value.level[i] = clip(v);
249 }
250 break;
251 default:
252 errx(1, "Invalid format.");
253 }
254 p->changed = 1;
255 return 1;
256 }
257
258 static void
259 wrarg(int fd, char *arg, const char *sep)
260 {
261 char *q;
262 struct field *p;
263 mixer_ctrl_t val;
264 int incdec, r;
265
266 q = strchr(arg, '=');
267 if (q == NULL) {
268 int l = strlen(arg);
269 incdec = 0;
270 if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+')
271 incdec = 1;
272 else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-')
273 incdec = -1;
274 else {
275 warnx("No `=' in %s", arg);
276 return;
277 }
278 arg[l-2] = 0;
279 } else if (q > arg && (*(q-1) == '+' || *(q-1) == '-')) {
280 if (sscanf(q+1, "%d", &incdec) != 1) {
281 warnx("Bad number %s", q+1);
282 return;
283 }
284 if (*(q-1) == '-')
285 incdec *= -1;
286 *(q-1) = 0;
287 q = NULL;
288 } else
289 *q++ = 0;
290
291 p = findfield(arg);
292 if (p == NULL) {
293 warnx("field %s does not exist", arg);
294 return;
295 }
296
297 val = *p->valp;
298 if (q != NULL)
299 r = rdfield(p, q);
300 else
301 r = incfield(p, incdec);
302 if (r) {
303 if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) < 0)
304 warn("AUDIO_MIXER_WRITE");
305 else if (sep) {
306 *p->valp = val;
307 prfield(p, ": ", 0);
308 ioctl(fd, AUDIO_MIXER_READ, p->valp);
309 printf(" -> ");
310 prfield(p, 0, 0);
311 printf("\n");
312 }
313 }
314 }
315
316 static void
317 prarg(int fd, char *arg, const char *sep)
318 {
319 struct field *p;
320
321 p = findfield(arg);
322 if (p == NULL)
323 warnx("field %s does not exist", arg);
324 else
325 prfield(p, sep, vflag), fprintf(out, "\n");
326 }
327
328 static inline void __dead
329 usage(void)
330 {
331 fprintf(out, "%s [-d file] [-v] [-n] name ...\n", prog);
332 fprintf(out, "%s [-d file] [-v] [-n] -w name=value ...\n",prog);
333 fprintf(out, "%s [-d file] [-v] [-n] -a\n", prog);
334 exit(0);
335 }
336
337 int
338 main(int argc, char **argv)
339 {
340 int fd, i, j, ch, pos;
341 int aflag = 0, wflag = 0;
342 const char *file;
343 const char *sep = "=";
344 mixer_devinfo_t dinfo;
345 int ndev;
346
347 file = getenv("MIXERDEVICE");
348 if (file == NULL)
349 file = mixer_path;
350
351 prog = *argv;
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 < 0 && file == mixer_path) {
385 file = _PATH_MIXER0;
386 fd = open(file, O_RDWR);
387 }
388
389 if (fd < 0)
390 err(1, "%s", file);
391
392 for (ndev = 0; ; ndev++) {
393 dinfo.index = ndev;
394 if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) < 0)
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 ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]);
405 }
406
407 for (i = 0; i < ndev; i++) {
408 rfields[i].name = infos[i].label.name;
409 rfields[i].valp = &values[i];
410 rfields[i].infp = &infos[i];
411 }
412
413 for (i = 0; i < ndev; i++) {
414 values[i].dev = i;
415 values[i].type = infos[i].type;
416 if (infos[i].type != AUDIO_MIXER_CLASS) {
417 values[i].un.value.num_channels = 2;
418 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0) {
419 values[i].un.value.num_channels = 1;
420 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0)
421 err(1, "AUDIO_MIXER_READ");
422 }
423 }
424 }
425
426 for (j = i = 0; i < ndev; i++) {
427 if (infos[i].type != AUDIO_MIXER_CLASS &&
428 infos[i].type != -1) {
429 fields[j++] = rfields[i];
430 for (pos = infos[i].next; pos != AUDIO_MIXER_LAST;
431 pos = infos[pos].next) {
432 fields[j] = rfields[pos];
433 fields[j].name = catstr(rfields[i].name,
434 infos[pos].label.name);
435 infos[pos].type = -1;
436 j++;
437 }
438 }
439 }
440
441 for (i = 0; i < j; i++) {
442 int cls = fields[i].infp->mixer_class;
443 if (cls >= 0 && cls < ndev)
444 fields[i].name = catstr(infos[cls].label.name,
445 fields[i].name);
446 }
447
448 if (argc == 0 && aflag && !wflag) {
449 for (i = 0; i < j; i++) {
450 prfield(&fields[i], sep, vflag);
451 fprintf(out, "\n");
452 }
453 } else if (argc > 0 && !aflag) {
454 while (argc--) {
455 if (wflag)
456 wrarg(fd, *argv, sep);
457 else
458 prarg(fd, *argv, sep);
459 argv++;
460 }
461 } else
462 usage();
463 exit(0);
464 }
465