freebsd-dev/usr.sbin/mixer/mixer.c

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/*
* This is an example of a mixer program for Linux
*
* updated 1/1/93 to add stereo, level query, broken
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* devmask kludge - cmetz@thor.tjhsst.edu
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*
* (C) Craig Metz and Hannu Savolainen 1993.
*
* You may do anything you wish with this program.
*
* ditto for my modifications (John-Mark Gurney, 1997)
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*/
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#ifndef lint
static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
#include <stdlib.h>
#include <unistd.h>
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#include <sys/soundcard.h>
const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
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void usage(int devmask, int recmask);
int res_name(const char *name, int mask);
void print_recsrc(int recsrc);
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void
usage(int devmask, int recmask)
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{
int i, n;
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printf("usage: mixer [-f device] [-s] [[dev [voll[:volr]] | recsrc | {^|+|-|=}rec recdev] ... ]\n");
printf(" devices: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if ((1 << i) & devmask) {
if (n)
printf(", ");
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printf("%s", names[i]);
n = 1;
}
printf("\n rec devices: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & recmask) {
if (n)
printf(", ");
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printf("%s", names[i]);
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n = 1;
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}
printf("\n");
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exit(1);
}
int
res_name(const char *name, int mask)
{
int foo;
for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
if ((1 << foo) & mask && !strcmp(names[foo], name))
break;
return foo == SOUND_MIXER_NRDEVICES ? -1 : foo;
}
void
print_recsrc(int recsrc)
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{
int i, n = 0;
fprintf(stderr, "Recording source: ");
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & recsrc) {
if (n)
fprintf(stderr, ", ");
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fprintf(stderr, "%s", names[i]);
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n = 1;
}
fprintf(stderr, "\n");
}
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int
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main(int argc, char *argv[])
{
int foo, bar, baz, dev;
int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
int dusage = 0, drecsrc = 0, shortflag = 0;
int l = 0, r = 0, t = 0;
char ch;
char *name;
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name = strdup("/dev/mixer");
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if (!strcmp(argv[0], "mixer2"))
name = strdup("/dev/mixer1");
else if (!strcmp(argv[0], "mixer3"))
name = strdup("/dev/mixer2");
while ((ch = getopt(argc, argv, "f:s")) != -1)
switch (ch) {
case 'f':
name = strdup(optarg);
break;
case 's':
shortflag = 1;
break;
default:
dusage = 1;
}
argc -= (optind - 1);
argv += (optind - 1);
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if ((baz = open(name, O_RDWR)) < 0)
err(1, "%s", name);
free(name);
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if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
err(1, "SOUND_MIXER_READ_DEVMASK");
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if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
err(1, "SOUND_MIXER_READ_RECMASK");
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if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_READ_RECSRC");
orecsrc = recsrc;
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if ((argc == 1) && (dusage == 0)) {
for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
if (!((1 << foo) & devmask))
continue;
if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
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warn("MIXER_READ");
continue;
}
if (shortflag)
printf("%s %d:%d ", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
else
printf("Mixer %-8s is currently set to %3d:%d\n", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
}
return(0);
}
argc--; argv++;
while ((argc > 0) && (dusage == 0)) {
if (!strcmp("recsrc", *argv)) {
drecsrc = 1;
argc--; argv++;
continue;
} else if (argc > 1 && !strcmp("rec", *argv + 1)) {
if (**argv != '+' && **argv != '-' &&
**argv != '=' && **argv != '^') {
warnx("unknown modifier: %c", **argv);
dusage = 1;
break;
}
if ((dev = res_name(argv[1], recmask)) == -1) {
warnx("unknown recording device: %s", argv[1]);
dusage = 1;
break;
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}
switch(**argv) {
case '+':
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recsrc |= (1 << dev);
break;
case '-':
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recsrc &= ~(1 << dev);
break;
case '=':
recsrc = (1 << dev);
break;
case '^':
recsrc ^= (1 << dev);
break;
}
drecsrc = 1;
argc -= 2; argv += 2;
continue;
}
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if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
dev = 0;
}
else if((dev = res_name(*argv, devmask)) == -1) {
warnx("unknown device: %s", *argv);
dusage = 1;
break;
}
switch(argc > 1 ? sscanf(argv[1], "%d:%d", &l, &r) : t) {
case 0:
if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
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warn("MIXER_READ");
argc--; argv++;
continue;
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}
if (shortflag)
printf("%s %d:%d ", names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
else
printf("Mixer %-8s is currently set to %3d:%d\n",
names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
argc--; argv++;
break;
case 1:
r = l;
case 2:
if (l < 0)
l = 0;
else if (l > 100)
l = 100;
if (r < 0)
r = 0;
else if (r > 100)
r = 100;
if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
warn("MIXER_READ");
argc--; argv++;
continue;
}
printf("Setting the mixer %s from %d:%d to %d:%d.\n",
names[dev], bar & 0x7f, (bar >> 8) & 0x7f, l, r);
l |= r << 8;
if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
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warn("WRITE_MIXER");
argc -= 2; argv += 2;
break;
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}
}
if (dusage) {
close(baz);
usage(devmask, recmask);
/* Not reached */
}
if (orecsrc != recsrc)
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if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_WRITE_RECSRC");
if (drecsrc) {
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if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_READ_RECSRC");
print_recsrc(recsrc);
}
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close(baz);
exit(0);
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}