#include <err.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/soundcard.h>
static const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
static void usage(int devmask, int recmask);
static int res_name(const char *name, int mask);
static void print_recsrc(int recsrc, int recmask, int sflag);
static void
usage(int devmask, int recmask)
{
int i, n;
printf("usage: mixer [-f device] [-s | -S] [dev [+|-][voll[:[+|-]volr]] ...\n"
" mixer [-f device] [-s | -S] recsrc ...\n"
" mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ...\n");
if (devmask != 0) {
printf(" devices: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if ((1 << i) & devmask) {
if (n)
printf(", ");
printf("%s", names[i]);
n++;
}
}
}
if (recmask != 0) {
printf("\n rec devices: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if ((1 << i) & recmask) {
if (n)
printf(", ");
printf("%s", names[i]);
n++;
}
}
}
printf("\n");
exit(1);
}
static int
res_name(const char *name, int mask)
{
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & mask && strcmp(names[i], name) == 0)
break;
if (i == SOUND_MIXER_NRDEVICES)
return (-1);
return (i);
}
static void
print_recsrc(int recsrc, int recmask, int sflag)
{
int i, n;
if (recmask == 0)
return;
if (!sflag)
printf("Recording source: ");
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if ((1 << i) & recsrc) {
if (sflag)
printf("%srec ", n ? " +" : "=");
else if (n)
printf(", ");
printf("%s", names[i]);
n++;
}
}
if (!sflag)
printf("\n");
}
int
main(int argc, char *argv[])
{
char mixer[PATH_MAX] = "/dev/mixer";
char lstr[8], rstr[8];
char *name, *eptr;
int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
int dusage = 0, drecsrc = 0, sflag = 0, Sflag = 0;
int l, r, lrel, rrel;
int ch, i, bar, baz, dev, m, n, t;
if ((name = strdup(basename(argv[0]))) == NULL)
err(1, "strdup()");
if (strncmp(name, "mixer", 5) == 0 && name[5] != '\0') {
n = strtol(name + 5, &eptr, 10) - 1;
if (n > 0 && *eptr == '\0')
snprintf(mixer, PATH_MAX - 1, "/dev/mixer%d", n);
}
free(name);
name = mixer;
n = 1;
for (;;) {
if (n >= argc || *argv[n] != '-')
break;
if (strlen(argv[n]) != 2) {
if (strcmp(argv[n] + 1, "rec") != 0)
dusage = 1;
break;
}
ch = *(argv[n] + 1);
if (ch == 'f' && n < argc - 1) {
name = argv[n + 1];
n += 2;
} else if (ch == 's') {
sflag = 1;
n++;
} else if (ch == 'S') {
Sflag = 1;
n++;
} else {
dusage = 1;
break;
}
}
if (sflag && Sflag)
dusage = 1;
argc -= n - 1;
argv += n - 1;
if ((baz = open(name, O_RDWR)) < 0)
err(1, "%s", name);
if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
err(1, "SOUND_MIXER_READ_DEVMASK");
if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
err(1, "SOUND_MIXER_READ_RECMASK");
if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_READ_RECSRC");
orecsrc = recsrc;
if (argc == 1 && dusage == 0) {
for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (!((1 << i) & devmask))
continue;
if (ioctl(baz, MIXER_READ(i),&bar) == -1) {
warn("MIXER_READ");
continue;
}
if (Sflag || sflag) {
printf("%s%s%c%d:%d", n ? " " : "",
names[i], Sflag ? ':' : ' ',
bar & 0x7f, (bar >> 8) & 0x7f);
n++;
} else
printf("Mixer %-8s is currently set to "
"%3d:%d\n", names[i], bar & 0x7f,
(bar >> 8) & 0x7f);
}
if (n && recmask)
printf(" ");
print_recsrc(recsrc, recmask, Sflag || sflag);
return (0);
}
argc--;
argv++;
n = 0;
while (argc > 0 && dusage == 0) {
if (strcmp("recsrc", *argv) == 0) {
drecsrc = 1;
argc--;
argv++;
continue;
} else if (strcmp("rec", *argv + 1) == 0) {
if (**argv != '+' && **argv != '-' &&
**argv != '=' && **argv != '^') {
warnx("unknown modifier: %c", **argv);
dusage = 1;
break;
}
if (argc <= 1) {
warnx("no recording device specified");
dusage = 1;
break;
}
if ((dev = res_name(argv[1], recmask)) == -1) {
warnx("unknown recording device: %s", argv[1]);
dusage = 1;
break;
}
switch (**argv) {
case '+':
recsrc |= (1 << dev);
break;
case '-':
recsrc &= ~(1 << dev);
break;
case '=':
recsrc = (1 << dev);
break;
case '^':
recsrc ^= (1 << dev);
break;
}
drecsrc = 1;
argc -= 2;
argv += 2;
continue;
}
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;
}
lrel = rrel = 0;
if (argc > 1) {
m = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
if (m > 0) {
if (*lstr == '+' || *lstr == '-')
lrel = rrel = 1;
l = strtol(lstr, NULL, 10);
}
if (m > 1) {
if (*rstr == '+' || *rstr == '-')
rrel = 1;
r = strtol(rstr, NULL, 10);
}
}
switch (argc > 1 ? m : t) {
case 0:
if (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
warn("MIXER_READ");
argc--;
argv++;
continue;
}
if (Sflag || sflag) {
printf("%s%s%c%d:%d", n ? " " : "",
names[dev], Sflag ? ':' : ' ',
bar & 0x7f, (bar >> 8) & 0x7f);
n++;
} 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 (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
warn("MIXER_READ");
argc--;
argv++;
continue;
}
if (lrel)
l = (bar & 0x7f) + l;
if (rrel)
r = ((bar >> 8) & 0x7f) + r;
if (l < 0)
l = 0;
else if (l > 100)
l = 100;
if (r < 0)
r = 0;
else if (r > 100)
r = 100;
if (!Sflag)
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)
warn("WRITE_MIXER");
argc -= 2;
argv += 2;
break;
}
}
if (dusage) {
close(baz);
usage(devmask, recmask);
}
if (orecsrc != recsrc) {
if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_WRITE_RECSRC");
if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
err(1, "SOUND_MIXER_READ_RECSRC");
}
if (drecsrc)
print_recsrc(recsrc, recmask, Sflag || sflag);
close(baz);
return (0);
}
