mixer.c revision 124830 
1/*
2 *	This is an example of a mixer program for Linux
3 *
4 *	updated 1/1/93 to add stereo, level query, broken
5 *      	devmask kludge - cmetz@thor.tjhsst.edu
6 *
7 * (C) Craig Metz and Hannu Savolainen 1993.
8 *
9 * You may do anything you wish with this program.
10 *
11 * ditto for my modifications (John-Mark Gurney, 1997)
12 */
13
14#include <sys/cdefs.h>
15__FBSDID("$FreeBSD: head/usr.sbin/mixer/mixer.c 124830 2004-01-22 07:23:36Z grehan $");
16
17#include <err.h>
18#include <fcntl.h>
19#include <stdio.h>
20#include <string.h>
21#include <stdlib.h>
22#include <unistd.h>
23#include <sys/soundcard.h>
24
25const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
26
27void usage(int devmask, int recmask);
28int res_name(const char *name, int mask);
29void print_recsrc(int recsrc);
30
31void
32usage(int devmask, int recmask)
33{
34	int i, n;
35
36	printf("usage: mixer [-f device] [-s] [dev [+|-][voll[:[+|-]volr]] ...\n"
37	       "       mixer [-f device] [-s] recsrc ...\n"
38	       "       mixer [-f device] [-s] {^|+|-|=}rec rdev ... \n");
39	printf(" devices: ");
40	for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
41		if ((1 << i) & devmask)  {
42			if (n)
43				printf(", ");
44			printf("%s", names[i]);
45			n = 1;
46		}
47	printf("\n rec devices: ");
48	for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
49		if ((1 << i) & recmask)  {
50			if (n)
51				printf(", ");
52			printf("%s", names[i]);
53			n = 1;
54		}
55	printf("\n");
56	exit(1);
57}
58
59int
60res_name(const char *name, int mask)
61{
62	int foo;
63
64	for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
65		if ((1 << foo) & mask && !strcmp(names[foo], name))
66			break;
67
68	return foo == SOUND_MIXER_NRDEVICES ? -1 : foo;
69}
70
71void
72print_recsrc(int recsrc)
73{
74	int i, n = 0;
75	fprintf(stderr, "Recording source: ");
76
77	for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
78		if ((1 << i) & recsrc) {
79			if (n)
80				fprintf(stderr, ", ");
81			fprintf(stderr, "%s", names[i]);
82			n = 1;
83		}
84	fprintf(stderr, "\n");
85}
86
87int
88main(int argc, char *argv[])
89{
90	int foo, bar, baz, dev;
91	int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
92	int dusage = 0, drecsrc = 0, shortflag = 0;
93	int l = 0, r = 0, t = 0;
94	char lstr[5], rstr[5];
95	int n = 0, lrel = 0, rrel = 0;
96	int ch;
97
98	char *name;
99
100	name = strdup("/dev/mixer");
101
102	if (!strcmp(argv[0], "mixer2"))
103		name = strdup("/dev/mixer1");
104	else if (!strcmp(argv[0], "mixer3"))
105		name = strdup("/dev/mixer2");
106
107	while ((ch = getopt(argc, argv, "f:s")) != -1)
108		switch (ch) {
109			case 'f':
110				name = strdup(optarg);
111				break;
112			case 's':
113				shortflag = 1;
114				break;
115			default:
116				dusage = 1;
117		}
118	argc -= (optind - 1);
119	argv += (optind - 1);
120
121	if ((baz = open(name, O_RDWR)) < 0)
122		err(1, "%s", name);
123	free(name);
124	if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
125		err(1, "SOUND_MIXER_READ_DEVMASK");
126	if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
127		err(1, "SOUND_MIXER_READ_RECMASK");
128	if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
129		err(1, "SOUND_MIXER_READ_RECSRC");
130	orecsrc = recsrc;
131
132	if ((argc == 1) && (dusage == 0)) {
133		for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
134			if (!((1 << foo) & devmask))
135				continue;
136			if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
137			   	warn("MIXER_READ");
138				continue;
139			}
140			if (shortflag)
141				printf("%s %d:%d ", names[foo], bar & 0x7f,
142				       (bar >> 8) & 0x7f);
143			else
144				printf("Mixer %-8s is currently set to %3d:%d\n",
145				       names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
146		}
147		if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
148			err(1, "SOUND_MIXER_READ_RECSRC");
149		print_recsrc(recsrc);
150		return(0);
151	}
152
153	argc--; argv++;
154
155	while ((argc > 0) && (dusage == 0)) {
156		if (!strcmp("recsrc", *argv)) {
157			drecsrc = 1;
158			argc--; argv++;
159			continue;
160		} else if (argc > 1 && !strcmp("rec", *argv + 1)) {
161			if (**argv != '+' && **argv != '-' &&
162			    **argv != '=' && **argv != '^') {
163				warnx("unknown modifier: %c", **argv);
164				dusage = 1;
165				break;
166			}
167			if ((dev = res_name(argv[1], recmask)) == -1) {
168				warnx("unknown recording device: %s", argv[1]);
169				dusage = 1;
170				break;
171			}
172			switch(**argv) {
173			case '+':
174				recsrc |= (1 << dev);
175				break;
176			case '-':
177				recsrc &= ~(1 << dev);
178				break;
179			case '=':
180				recsrc = (1 << dev);
181				break;
182			case '^':
183				recsrc ^= (1 << dev);
184				break;
185			}
186			drecsrc = 1;
187			argc -= 2; argv += 2;
188			continue;
189		}
190
191		if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
192			dev = 0;
193		}
194		else if((dev = res_name(*argv, devmask)) == -1) {
195			warnx("unknown device: %s", *argv);
196			dusage = 1;
197			break;
198		}
199
200#define	issign(c)	(((c) == '+') || ((c) == '-'))
201
202		if (argc > 1) {
203			n = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
204			if (n > 0) {
205				if (issign(lstr[0]))
206					lrel = rrel = 1;
207				l = atoi(lstr);
208			}
209			if (n > 1) {
210				rrel = 0;
211				if (issign(rstr[0]))
212					rrel = 1;
213				r = atoi(rstr);
214			}
215		}
216
217		switch(argc > 1 ? n : t) {
218		case 0:
219			if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
220				warn("MIXER_READ");
221				argc--; argv++;
222				continue;
223			}
224			if (shortflag)
225				printf("%s %d:%d ", names[dev], bar & 0x7f,
226				       (bar >> 8) & 0x7f);
227			else
228				printf("Mixer %-8s is currently set to %3d:%d\n",
229				  names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
230
231			argc--; argv++;
232			break;
233		case 1:
234			r = l;
235		case 2:
236			if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
237				warn("MIXER_READ");
238				argc--; argv++;
239				continue;
240			}
241
242			if (lrel)
243				l = (bar & 0x7f) + l;
244			if (rrel)
245				r = ((bar >> 8) & 0x7f) + r;
246
247			if (l < 0)
248				l = 0;
249			else if (l > 100)
250				l = 100;
251			if (r < 0)
252				r = 0;
253			else if (r > 100)
254				r = 100;
255
256			printf("Setting the mixer %s from %d:%d to %d:%d.\n",
257			    names[dev], bar & 0x7f, (bar >> 8) & 0x7f, l, r);
258
259			l |= r << 8;
260			if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
261				warn("WRITE_MIXER");
262
263			argc -= 2; argv += 2;
264 			break;
265		}
266	}
267
268	if (dusage) {
269		close(baz);
270		usage(devmask, recmask);
271		/* Not reached */
272	}
273
274	if (orecsrc != recsrc)
275		if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
276			err(1, "SOUND_MIXER_WRITE_RECSRC");
277
278	if (drecsrc) {
279		if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
280			err(1, "SOUND_MIXER_READ_RECSRC");
281		print_recsrc(recsrc);
282	}
283
284	close(baz);
285
286	exit(0);
287}
288