mixer.c revision 50912 
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#ifndef lint
15static const char rcsid[] =
16  "$FreeBSD: head/usr.sbin/mixer/mixer.c 50912 1999-09-04 15:20:48Z peter $";
17#endif /* not lint */
18
19#include <err.h>
20#include <fcntl.h>
21#include <stdio.h>
22#include <string.h>
23#include <stdlib.h>
24#include <unistd.h>
25#include <sys/soundcard.h>
26
27char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
28
29void usage(int devmask, int recmask);
30int res_name(const char *name, int mask);
31void print_recsrc(int recsrc);
32
33void
34usage(int devmask, int recmask)
35{
36	int i, n;
37
38	printf("usage: mixer [[dev [voll[:volr]] | recsrc | {^|+|-|=}rec recdev] ... ]\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(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(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, 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;
93	int l, r;
94
95	char *name;
96
97	name = strdup("/dev/mixer");
98
99	if (!strcmp(argv[0], "mixer2"))
100		name = strdup("/dev/mixer1");
101	else if (!strcmp(argv[0], "mixer3"))
102		name = strdup("/dev/mixer2");
103
104	if (argc > 2 && strcmp(argv[1], "-f") == 0) {
105		name = strdup(argv[2]);
106		argc -= 2; argv += 2;
107	}
108
109	if ((baz = open(name, O_RDWR)) < 0)
110		err(1, "%s", name);
111	free(name);
112	if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
113		err(1, "SOUND_MIXER_READ_DEVMASK");
114	if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
115		err(1, "SOUND_MIXER_READ_RECMASK");
116	if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
117		err(1, "SOUND_MIXER_READ_RECSRC");
118	orecsrc = recsrc;
119
120	if (argc == 1) {
121		for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
122			if (!((1 << foo) & devmask))
123				continue;
124			if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
125			   	warn("MIXER_READ");
126				continue;
127			}
128			printf("Mixer %-8s is currently set to %3d:%d\n", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
129		}
130		return(0);
131	}
132
133	argc--; argv++;
134
135	while (argc) {
136		if (!strcmp("recsrc", *argv)) {
137			drecsrc = 1;
138			argc--; argv++;
139			continue;
140		} else if (argc > 1 && !strcmp("rec", *argv + 1)) {
141			if (**argv != '+' && **argv != '-' &&
142			    **argv != '=' && **argv != '^') {
143				dusage = 1;
144				argc -= 1; argv += 1;
145				continue;
146			}
147			if ((dev = res_name(argv[1], recmask)) == -1) {
148				dusage = 1;
149				argc -= 1; argv += 1;
150				continue;
151			}
152			switch(**argv) {
153			case '+':
154				recsrc |= (1 << dev);
155				break;
156			case '-':
157				recsrc &= ~(1 << dev);
158				break;
159			case '=':
160				recsrc = (1 << dev);
161				break;
162			case '^':
163				recsrc ^= (1 << dev);
164				break;
165			}
166			drecsrc = 1;
167			argc -= 2; argv += 2;
168			continue;
169		}
170
171		if ((dev = res_name(*argv, devmask)) == -1) {
172			dusage = 1;
173			argc--; argv++;
174			continue;
175		}
176
177		switch(argc > 1 ? sscanf(argv[1], "%d:%d", &l, &r) : 0) {
178		case 0:
179			if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
180				warn("MIXER_READ");
181				argc--; argv++;
182				continue;
183			}
184			printf("Mixer %-8s is currently set to %3d:%d\n",
185			    names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
186
187			argc--; argv++;
188			break;
189		case 1:
190			r = l;
191		case 2:
192			if (l < 0)
193				l = 0;
194			else if (l > 100)
195				l = 100;
196			if (r < 0)
197				r = 0;
198			else if (r > 100)
199				r = 100;
200
201			printf("Setting the mixer %s to %d:%d.\n", names[dev],
202			    l, r);
203
204			l |= r << 8;
205			if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
206				warn("WRITE_MIXER");
207
208			argc -= 2; argv += 2;
209 			break;
210		}
211	}
212
213	if (orecsrc != recsrc)
214		if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
215			err(1, "SOUND_MIXER_WRITE_RECSRC");
216
217	if (drecsrc) {
218		if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
219			err(1, "SOUND_MIXER_READ_RECSRC");
220		print_recsrc(recsrc);
221	}
222
223	close(baz);
224
225	if (dusage)
226		usage(devmask, recmask);
227
228	exit(0);
229}
230