mixerctl.c revision 1.27 1 /* $NetBSD: mixerctl.c,v 1.27 2017/02/23 14:09:11 kre 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 1.27 2017/02/23 14:09:11 kre 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 rdfield(struct field *p, char *q)
143 {
144 mixer_ctrl_t *m;
145 int v, v0, v1, mask;
146 int i;
147 char *s;
148
149 m = p->valp;
150 switch(m->type) {
151 case AUDIO_MIXER_ENUM:
152 for (i = 0; i < p->infp->un.e.num_mem; i++)
153 if (strcmp(p->infp->un.e.member[i].label.name, q) == 0)
154 break;
155 if (i < p->infp->un.e.num_mem)
156 m->un.ord = p->infp->un.e.member[i].ord;
157 else {
158 warnx("Bad enum value %s", q);
159 return 0;
160 }
161 break;
162 case AUDIO_MIXER_SET:
163 mask = 0;
164 for (v = 0; q && *q; q = s) {
165 s = strchr(q, ',');
166 if (s)
167 *s++ = 0;
168 for (i = 0; i < p->infp->un.s.num_mem; i++)
169 if (strcmp(p->infp->un.s.member[i].label.name,
170 q) == 0)
171 break;
172 if (i < p->infp->un.s.num_mem) {
173 mask |= p->infp->un.s.member[i].mask;
174 } else {
175 warnx("Bad set value %s", q);
176 return 0;
177 }
178 }
179 m->un.mask = mask;
180 break;
181 case AUDIO_MIXER_VALUE:
182 if (m->un.value.num_channels == 1) {
183 if (sscanf(q, "%d", &v) == 1) {
184 m->un.value.level[0] = v;
185 } else {
186 warnx("Bad number %s", q);
187 return 0;
188 }
189 } else {
190 if (sscanf(q, "%d,%d", &v0, &v1) == 2) {
191 m->un.value.level[0] = v0;
192 m->un.value.level[1] = v1;
193 } else if (sscanf(q, "%d", &v) == 1) {
194 m->un.value.level[0] = m->un.value.level[1] = v;
195 } else {
196 warnx("Bad numbers %s", q);
197 return 0;
198 }
199 }
200 break;
201 default:
202 errx(1, "Invalid format.");
203 }
204 p->changed = 1;
205 return 1;
206 }
207
208 static int
209 incfield(struct field *p, int inc)
210 {
211 mixer_ctrl_t *m;
212 int i, v;
213
214 m = p->valp;
215 switch(m->type) {
216 case AUDIO_MIXER_ENUM:
217 m->un.ord += inc;
218 if (m->un.ord < 0)
219 m->un.ord = p->infp->un.e.num_mem - 1;
220 if (m->un.ord >= p->infp->un.e.num_mem)
221 m->un.ord = 0;
222 break;
223 case AUDIO_MIXER_SET:
224 m->un.mask += inc;
225 if (m->un.mask < 0)
226 m->un.mask = (1 << p->infp->un.s.num_mem) - 1;
227 if (m->un.mask >= (1 << p->infp->un.s.num_mem))
228 m->un.mask = 0;
229 warnx("Can't ++/-- %s", p->name);
230 return 0;
231 case AUDIO_MIXER_VALUE:
232 if (p->infp->un.v.delta)
233 inc *= p->infp->un.v.delta;
234 for (i = 0; i < m->un.value.num_channels; i++) {
235 v = m->un.value.level[i];
236 v += inc;
237 if (v < AUDIO_MIN_GAIN)
238 v = AUDIO_MIN_GAIN;
239 if (v > AUDIO_MAX_GAIN)
240 v = AUDIO_MAX_GAIN;
241 m->un.value.level[i] = v;
242 }
243 break;
244 default:
245 errx(1, "Invalid format.");
246 }
247 p->changed = 1;
248 return 1;
249 }
250
251 static void
252 wrarg(int fd, char *arg, const char *sep)
253 {
254 char *q;
255 struct field *p;
256 mixer_ctrl_t val;
257 int incdec, r;
258
259 q = strchr(arg, '=');
260 if (q == NULL) {
261 int l = strlen(arg);
262 incdec = 0;
263 if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+')
264 incdec = 1;
265 else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-')
266 incdec = -1;
267 else {
268 warnx("No `=' in %s", arg);
269 return;
270 }
271 arg[l-2] = 0;
272 } else if (q > arg && (*(q-1) == '+' || *(q-1) == '-')) {
273 if (sscanf(q+1, "%d", &incdec) != 1) {
274 warnx("Bad number %s", q+1);
275 return;
276 }
277 if (*(q-1) == '-')
278 incdec *= -1;
279 *(q-1) = 0;
280 q = NULL;
281 } else
282 *q++ = 0;
283
284 p = findfield(arg);
285 if (p == NULL) {
286 warnx("field %s does not exist", arg);
287 return;
288 }
289
290 val = *p->valp;
291 if (q != NULL)
292 r = rdfield(p, q);
293 else
294 r = incfield(p, incdec);
295 if (r) {
296 if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) < 0)
297 warn("AUDIO_MIXER_WRITE");
298 else if (sep) {
299 *p->valp = val;
300 prfield(p, ": ", 0);
301 ioctl(fd, AUDIO_MIXER_READ, p->valp);
302 printf(" -> ");
303 prfield(p, 0, 0);
304 printf("\n");
305 }
306 }
307 }
308
309 static void
310 prarg(int fd, char *arg, const char *sep)
311 {
312 struct field *p;
313
314 p = findfield(arg);
315 if (p == NULL)
316 warnx("field %s does not exist", arg);
317 else
318 prfield(p, sep, vflag), fprintf(out, "\n");
319 }
320
321 static inline void __dead
322 usage(void)
323 {
324 fprintf(out, "%s [-d file] [-v] [-n] name ...\n", prog);
325 fprintf(out, "%s [-d file] [-v] [-n] -w name=value ...\n",prog);
326 fprintf(out, "%s [-d file] [-v] [-n] -a\n", prog);
327 exit(0);
328 }
329
330 int
331 main(int argc, char **argv)
332 {
333 int fd, i, j, ch, pos;
334 int aflag = 0, wflag = 0;
335 const char *file;
336 const char *sep = "=";
337 mixer_devinfo_t dinfo;
338 int ndev;
339
340 file = getenv("MIXERDEVICE");
341 if (file == NULL)
342 file = mixer_path;
343
344 prog = *argv;
345
346 while ((ch = getopt(argc, argv, "ad:f:nvw")) != -1) {
347 switch(ch) {
348 case 'a':
349 aflag++;
350 break;
351 case 'w':
352 wflag++;
353 break;
354 case 'v':
355 vflag++;
356 break;
357 case 'n':
358 sep = 0;
359 break;
360 case 'f': /* compatibility */
361 case 'd':
362 file = optarg;
363 break;
364 case '?':
365 default:
366 usage();
367 }
368 }
369 argc -= optind;
370 argv += optind;
371
372 if (aflag ? (argc != 0 || wflag) : argc == 0)
373 usage();
374
375 fd = open(file, O_RDWR);
376 /* Try with mixer0 but only if using the default device. */
377 if (fd < 0 && file == mixer_path) {
378 file = _PATH_MIXER0;
379 fd = open(file, O_RDWR);
380 }
381
382 if (fd < 0)
383 err(1, "%s", file);
384
385 for (ndev = 0; ; ndev++) {
386 dinfo.index = ndev;
387 if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) < 0)
388 break;
389 }
390 rfields = calloc(ndev, sizeof *rfields);
391 fields = calloc(ndev, sizeof *fields);
392 infos = calloc(ndev, sizeof *infos);
393 values = calloc(ndev, sizeof *values);
394
395 for (i = 0; i < ndev; i++) {
396 infos[i].index = i;
397 ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]);
398 }
399
400 for (i = 0; i < ndev; i++) {
401 rfields[i].name = infos[i].label.name;
402 rfields[i].valp = &values[i];
403 rfields[i].infp = &infos[i];
404 }
405
406 for (i = 0; i < ndev; i++) {
407 values[i].dev = i;
408 values[i].type = infos[i].type;
409 if (infos[i].type != AUDIO_MIXER_CLASS) {
410 values[i].un.value.num_channels = 2;
411 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0) {
412 values[i].un.value.num_channels = 1;
413 if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0)
414 err(1, "AUDIO_MIXER_READ");
415 }
416 }
417 }
418
419 for (j = i = 0; i < ndev; i++) {
420 if (infos[i].type != AUDIO_MIXER_CLASS &&
421 infos[i].type != -1) {
422 fields[j++] = rfields[i];
423 for (pos = infos[i].next; pos != AUDIO_MIXER_LAST;
424 pos = infos[pos].next) {
425 fields[j] = rfields[pos];
426 fields[j].name = catstr(rfields[i].name,
427 infos[pos].label.name);
428 infos[pos].type = -1;
429 j++;
430 }
431 }
432 }
433
434 for (i = 0; i < j; i++) {
435 int cls = fields[i].infp->mixer_class;
436 if (cls >= 0 && cls < ndev)
437 fields[i].name = catstr(infos[cls].label.name,
438 fields[i].name);
439 }
440
441 if (argc == 0 && aflag && !wflag) {
442 for (i = 0; i < j; i++) {
443 prfield(&fields[i], sep, vflag);
444 fprintf(out, "\n");
445 }
446 } else if (argc > 0 && !aflag) {
447 while (argc--) {
448 if (wflag)
449 wrarg(fd, *argv, sep);
450 else
451 prarg(fd, *argv, sep);
452 argv++;
453 }
454 } else
455 usage();
456 exit(0);
457 }
458