xref: /netbsd-src/usr.bin/mixerctl/mixerctl.c (revision 3b01aba77a7a698587faaae455bbfe740923c1f5)
1 /*	$NetBSD: mixerctl.c,v 1.15 2000/12/29 13:30:26 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 #define MIXER "/dev/mixer0"
49 #define OLD_MIXER "/dev/mixer"
50 
51 FILE *out = stdout;
52 int vflag = 0;
53 
54 char *prog;
55 
56 struct field {
57 	char *name;
58 	mixer_ctrl_t *valp;
59 	mixer_devinfo_t *infp;
60 	char changed;
61 } *fields, *rfields;
62 
63 mixer_ctrl_t *values;
64 mixer_devinfo_t *infos;
65 
66 static char *
67 catstr(char *p, char *q)
68 {
69 	char *r = malloc(strlen(p) + strlen(q) + 2);
70 	strcpy(r, p);
71 	strcat(r, ".");
72 	strcat(r, q);
73 	return r;
74 }
75 
76 static struct field *
77 findfield(char *name)
78 {
79 	int i;
80 	for(i = 0; fields[i].name; i++)
81 		if (strcmp(fields[i].name, name) == 0)
82 			return &fields[i];
83 	return 0;
84 }
85 
86 static void
87 prfield(struct field *p, char *sep, int prvalset)
88 {
89 	mixer_ctrl_t *m;
90 	int i, n;
91 
92 	if (sep)
93 		fprintf(out, "%s%s", p->name, sep);
94 	m = p->valp;
95 	switch(m->type) {
96 	case AUDIO_MIXER_ENUM:
97 		for(i = 0; i < p->infp->un.e.num_mem; i++)
98 			if (p->infp->un.e.member[i].ord == m->un.ord)
99 				fprintf(out, "%s",
100 					p->infp->un.e.member[i].label.name);
101 		if (prvalset) {
102 			fprintf(out, "  [ ");
103 			for(i = 0; i < p->infp->un.e.num_mem; i++)
104 				fprintf(out, "%s ",
105 				    p->infp->un.e.member[i].label.name);
106 			fprintf(out, "]");
107 		}
108 		break;
109 	case AUDIO_MIXER_SET:
110 		for(n = i = 0; i < p->infp->un.s.num_mem; i++)
111 			if (m->un.mask & p->infp->un.s.member[i].mask)
112 				fprintf(out, "%s%s", n++ ? "," : "",
113 					p->infp->un.s.member[i].label.name);
114 		if (prvalset) {
115 			fprintf(out, "  { ");
116 			for(i = 0; i < p->infp->un.s.num_mem; i++)
117 				fprintf(out, "%s ",
118 				    p->infp->un.s.member[i].label.name);
119 			fprintf(out, "}");
120 		}
121 		break;
122 	case AUDIO_MIXER_VALUE:
123 		if (m->un.value.num_channels == 1)
124 			fprintf(out, "%d", m->un.value.level[0]);
125 		else
126 			fprintf(out, "%d,%d", m->un.value.level[0],
127 			       m->un.value.level[1]);
128 		if (prvalset) {
129 			fprintf(out, " %s", p->infp->un.v.units.name);
130 			if (p->infp->un.v.delta)
131 				fprintf(out, " delta=%d", p->infp->un.v.delta);
132 		}
133 		break;
134 	default:
135 		printf("\n");
136 		errx(1, "Invalid format.");
137 	}
138 }
139 
140 static int
141 rdfield(struct field *p, char *q)
142 {
143 	mixer_ctrl_t *m;
144 	int v, v0, v1, mask;
145 	int i;
146 	char *s;
147 
148 	m = p->valp;
149 	switch(m->type) {
150 	case AUDIO_MIXER_ENUM:
151 		for(i = 0; i < p->infp->un.e.num_mem; i++)
152 			if (strcmp(p->infp->un.e.member[i].label.name, q) == 0)
153 				break;
154 		if (i < p->infp->un.e.num_mem)
155 			m->un.ord = p->infp->un.e.member[i].ord;
156 		else {
157 			warnx("Bad enum value %s", q);
158 			return 0;
159 		}
160 		break;
161 	case AUDIO_MIXER_SET:
162 		mask = 0;
163 		for(v = 0; q && *q; q = s) {
164 			s = strchr(q, ',');
165 			if (s)
166 				*s++ = 0;
167 			for(i = 0; i < p->infp->un.s.num_mem; i++)
168 				if (strcmp(p->infp->un.s.member[i].label.name,
169 					   q) == 0)
170 					break;
171 			if (i < p->infp->un.s.num_mem) {
172 				mask |= p->infp->un.s.member[i].mask;
173 			} else {
174 				warnx("Bad set value %s", q);
175 				return 0;
176 			}
177 		}
178 		m->un.mask = mask;
179 		break;
180 	case AUDIO_MIXER_VALUE:
181 		if (m->un.value.num_channels == 1) {
182 			if (sscanf(q, "%d", &v) == 1) {
183 				m->un.value.level[0] = v;
184 			} else {
185 				warnx("Bad number %s", q);
186 				return 0;
187 			}
188 		} else {
189 			if (sscanf(q, "%d,%d", &v0, &v1) == 2) {
190 				m->un.value.level[0] = v0;
191 				m->un.value.level[1] = v1;
192 			} else if (sscanf(q, "%d", &v) == 1) {
193 				m->un.value.level[0] = m->un.value.level[1] = v;
194 			} else {
195 				warnx("Bad numbers %s", q);
196 				return 0;
197 			}
198 		}
199 		break;
200 	default:
201 		errx(1, "Invalid format.");
202 	}
203 	p->changed = 1;
204 	return 1;
205 }
206 
207 static int
208 incfield(struct field *p, int inc)
209 {
210 	mixer_ctrl_t *m;
211 	int i, v;
212 
213 	m = p->valp;
214 	switch(m->type) {
215 	case AUDIO_MIXER_ENUM:
216 		m->un.ord += inc;
217 		if (m->un.ord < 0)
218 			m->un.ord = p->infp->un.e.num_mem-1;
219 		if (m->un.ord >= p->infp->un.e.num_mem)
220 			m->un.ord = 0;
221 		break;
222 	case AUDIO_MIXER_SET:
223 		m->un.mask += inc;
224 		if (m->un.mask < 0)
225 			m->un.mask = (1 << p->infp->un.s.num_mem) - 1;
226 		if (m->un.mask >= (1 << p->infp->un.s.num_mem))
227 			m->un.mask = 0;
228 		warnx("Can't ++/-- %s", p->name);
229 		return 0;
230 	case AUDIO_MIXER_VALUE:
231 		if (p->infp->un.v.delta)
232 			inc *= p->infp->un.v.delta;
233 		for (i = 0; i < m->un.value.num_channels; i++) {
234 			v = m->un.value.level[i];
235 			v += inc;
236 			if (v < AUDIO_MIN_GAIN)
237 				v = AUDIO_MIN_GAIN;
238 			if (v > AUDIO_MAX_GAIN)
239 				v = AUDIO_MAX_GAIN;
240 			m->un.value.level[i] = v;
241 		}
242 		break;
243 	default:
244 		errx(1, "Invalid format.");
245 	}
246 	p->changed = 1;
247 	return 1;
248 }
249 
250 static void
251 wrarg(int fd, char *arg, char *sep)
252 {
253 	char *q;
254 	struct field *p;
255 	mixer_ctrl_t val;
256 	int incdec, r;
257 
258 	q = strchr(arg, '=');
259 	if (q == NULL) {
260 		int l = strlen(arg);
261 		incdec = 0;
262 		if (l > 2 && arg[l-2] == '+' && arg[l-1] == '+')
263 			incdec = 1;
264 		else if (l > 2 && arg[l-2] == '-' && arg[l-1] == '-')
265 			incdec = -1;
266 		else {
267 			warnx("No `=' in %s", arg);
268 			return;
269 		}
270 		arg[l-2] = 0;
271 	} else
272 		*q++ = 0;
273 
274 	p = findfield(arg);
275 	if (p == NULL) {
276 		warnx("field %s does not exist", arg);
277 		return;
278 	}
279 
280 	val = *p->valp;
281 	if (q != NULL)
282 		r = rdfield(p, q);
283 	else
284 		r = incfield(p, incdec);
285 	if (r) {
286 		if (ioctl(fd, AUDIO_MIXER_WRITE, p->valp) < 0)
287 			warn("AUDIO_MIXER_WRITE");
288 		else if (sep) {
289 			*p->valp = val;
290 			prfield(p, ": ", 0);
291 			ioctl(fd, AUDIO_MIXER_READ, p->valp);
292 			printf(" -> ");
293 			prfield(p, 0, 0);
294 			printf("\n");
295 		}
296 	}
297 }
298 
299 static void
300 prarg(int fd, char *arg, char *sep)
301 {
302 	struct field *p;
303 
304 	p = findfield(arg);
305 	if (p == NULL)
306 		warnx("field %s does not exist", arg);
307 	else
308 		prfield(p, sep, vflag), fprintf(out, "\n");
309 }
310 
311 int
312 main(int argc, char **argv)
313 {
314 	int fd, i, j, ch, pos;
315 	int aflag = 0, wflag = 0;
316 	char *file;
317 	char *sep = "=";
318 	mixer_devinfo_t dinfo;
319 	int ndev;
320 
321 	file = getenv("MIXERDEVICE");
322 	if (file == 0)
323 		file = MIXER;
324 
325 	prog = *argv;
326 
327 	while ((ch = getopt(argc, argv, "af:nvw")) != -1) {
328 		switch(ch) {
329 		case 'a':
330 			aflag++;
331 			break;
332 		case 'w':
333 			wflag++;
334 			break;
335 		case 'v':
336 			vflag++;
337 			break;
338 		case 'n':
339 			sep = 0;
340 			break;
341 		case 'f':
342 			file = optarg;
343 			break;
344 		case '?':
345 		default:
346 		usage:
347 		fprintf(out, "%s [-f file] [-v] [-n] name ...\n", prog);
348 		fprintf(out, "%s [-f file] [-v] [-n] -w name=value ...\n",prog);
349 		fprintf(out, "%s [-f 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 #ifdef OLD_MIXER
358         /* Allow the non-unit device to be used. */
359         if (fd < 0 && file == MIXER) {
360         	file = OLD_MIXER;
361                 fd = open(file, O_RDWR);
362         }
363 #endif
364 	if (fd < 0)
365 		err(1, "%s", file);
366 
367 	for(ndev = 0; ; ndev++) {
368 		dinfo.index = ndev;
369 		if (ioctl(fd, AUDIO_MIXER_DEVINFO, &dinfo) < 0)
370 			break;
371 	}
372 	rfields = calloc(ndev, sizeof *rfields);
373 	fields = calloc(ndev, sizeof *fields);
374 	infos = calloc(ndev, sizeof *infos);
375 	values = calloc(ndev, sizeof *values);
376 
377 	for(i = 0; i < ndev; i++) {
378 		infos[i].index = i;
379 		ioctl(fd, AUDIO_MIXER_DEVINFO, &infos[i]);
380 	}
381 
382 	for(i = 0; i < ndev; i++) {
383 		rfields[i].name = infos[i].label.name;
384 		rfields[i].valp = &values[i];
385 		rfields[i].infp = &infos[i];
386 	}
387 
388 	for(i = 0; i < ndev; i++) {
389 		values[i].dev = i;
390 		values[i].type = infos[i].type;
391 		if (infos[i].type != AUDIO_MIXER_CLASS) {
392 			values[i].un.value.num_channels = 2;
393 			if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0) {
394 				values[i].un.value.num_channels = 1;
395 				if (ioctl(fd, AUDIO_MIXER_READ, &values[i]) < 0)
396 					err(1, "AUDIO_MIXER_READ");
397 			}
398 		}
399 	}
400 
401 	for(j = i = 0; i < ndev; i++) {
402 		if (infos[i].type != AUDIO_MIXER_CLASS &&
403 		    infos[i].type != -1) {
404 			fields[j++] = rfields[i];
405 			for(pos = infos[i].next; pos != AUDIO_MIXER_LAST;
406 			    pos = infos[pos].next) {
407 				fields[j] = rfields[pos];
408 				fields[j].name = catstr(rfields[i].name,
409 							infos[pos].label.name);
410 				infos[pos].type = -1;
411 				j++;
412 			}
413 		}
414 	}
415 
416 	for(i = 0; i < j; i++) {
417 		int cls = fields[i].infp->mixer_class;
418 		if (cls >= 0 && cls < ndev)
419 			fields[i].name = catstr(infos[cls].label.name,
420 						fields[i].name);
421 	}
422 
423 	if (argc == 0 && aflag && !wflag) {
424 		for(i = 0; fields[i].name; i++) {
425 			prfield(&fields[i], sep, vflag);
426 			fprintf(out, "\n");
427 		}
428 	} else if (argc > 0 && !aflag) {
429 		while(argc--) {
430 			if (wflag)
431 				wrarg(fd, *argv, sep);
432 			else
433 				prarg(fd, *argv, sep);
434 			argv++;
435 		}
436 	} else
437 		goto usage;
438 	exit(0);
439 }
440