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