#include <stdio.h>
#include <fcntl.h>
#include <linux/soundcard.h>

static char *mixer_names[SOUND_MIXER_NRDEVICES] =
	SOUND_DEVICE_LABELS;

int
main(int argc, char **argv) {
	int val, from, to;
	int i, fd;

	fd = open("/dev/mixer", O_RDWR);
	if(fd < 0) {
		perror("/dev/mixer");
		return 1;
	}

	for(i = 2; i < argc; i += 2) {
		from = atoi(argv[i-1]);
		to = atoi(argv[i]);

		if(to == SOUND_MIXER_NONE)
			fprintf(stderr, "%s: turning off mixer %s\n",
				argv[0], mixer_names[to]);
		else
			fprintf(stderr, "%s: rerouting mixer %s to %s\n",
				argv[0], mixer_names[from], mixer_names[to]);

		val = from << 8 | to;

		if(ioctl(fd, SOUND_MIXER_PRIVATE2, &val)) {
			perror("AD1848 mixer reroute");
			return 1;
		}
	}

	return 0;
}