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/*
* This is an example of a mixer program for Linux
*
* updated 1/1/93 to add stereo, level query, broken
* devmask kludge - cmetz@thor.tjhsst.edu
*
* (C) Craig Metz and Hannu Savolainen 1993.
*
* You may do anything you wish with this program.
*/
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#ifdef __FreeBSD__
#include <machine/soundcard.h>
#else
#include <sys/soundcard.h>
#endif
char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
int devmask = 0, recmask = 0, recsrc = 0;
void usage(void)
{
int i, n = 0;
printf("Usage: mixer { ");
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & devmask) {
if (n)
putchar('|');
printf(names[i]);
n = 1;
}
printf(" } <value>\n or mixer { +rec|-rec } <devicename>\n");
exit(1);
}
void print_recsrc(void)
{
int i, n = 0;
fprintf(stderr, "Recording source: ");
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & recsrc) {
if (n)
fprintf(stderr, ", ");
fprintf(stderr, names[i]);
n = 1;
}
fprintf(stderr, "\n");
}
int
main(int argc, char *argv[])
{
int foo, bar, baz, dev;
char name[30] = "/dev/mixer";
if (!strcmp(argv[0], "mixer2"))
strcpy(name, "/dev/mixer1");
else
if (!strcmp(argv[0], "mixer3"))
strcpy(name, "/dev/mixer2");
if ((baz = open(name, O_RDWR)) < 0) {
perror(name);
exit(1);
}
if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
perror("SOUND_MIXER_READ_DEVMASK");
exit(-1);
}
if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1) {
perror("SOUND_MIXER_READ_RECMASK");
exit(-1);
}
if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) {
perror("SOUND_MIXER_READ_RECSRC");
exit(-1);
}
switch (argc) {
case 3:
bar = 1;
break;
case 2:
bar = 0;
break;
default:
usage();
}
for (foo = 0; foo < SOUND_MIXER_NRDEVICES && strcmp(names[foo], argv[1]); foo++);
if (foo >= SOUND_MIXER_NRDEVICES) {
if (!strcmp("+rec", argv[1]) || !strcmp("-rec", argv[1])) {
for (dev = 0; dev < SOUND_MIXER_NRDEVICES && strcmp(names[dev], argv[2]); dev++);
if (dev >= SOUND_MIXER_NRDEVICES)
usage();
if (!((1 << dev) & recmask)) {
fprintf(stderr, "Invalid recording source %s\n", argv[2]);
exit(-1);
}
if (argv[1][0] == '+')
recsrc |= (1 << dev);
else
recsrc &= ~(1 << dev);
if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1) {
perror("SOUND_MIXER_WRITE_RECSRC");
exit(-1);
}
print_recsrc();
} else
usage();
} else {
if (bar) {
if (strchr(argv[2], ':') == NULL) {
sscanf(argv[2], "%d", &bar);
dev = bar;
} else
sscanf(argv[2], "%d:%d", &bar, &dev);
if (bar < 0)
bar = 0;
if (dev < 0)
dev = 0;
if (bar > 100)
bar = 100;
if (dev > 100)
dev = 100;
printf("Setting the mixer %s to %d:%d.\n", names[foo], bar, dev);
bar |= dev << 8;
if (ioctl(baz, MIXER_WRITE(foo), &bar) == -1)
perror("WRITE_MIXER");
return (0);
} else {
if (ioctl(baz, MIXER_READ(foo),&bar)== -1)
perror("MIXER_READ");
printf("The mixer %s is currently set to %d:%d.\n", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
}
}
close(baz);
}
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