332 lines
6.8 KiB
C
332 lines
6.8 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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* ditto for my modifications (John-Mark Gurney, 1997)
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <fcntl.h>
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#include <libgen.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/soundcard.h>
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const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
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static void usage(int devmask, int recmask);
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static int res_name(const char *name, int mask);
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static void print_recsrc(int recsrc, int recmask, int sflag);
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static void
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usage(int devmask, int recmask)
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{
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int i, n;
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printf("usage: mixer [-f device] [-s | -S] [dev [+|-][voll[:[+|-]volr]] ...\n"
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" mixer [-f device] [-s | -S] recsrc ...\n"
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" mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ...\n");
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if (devmask != 0) {
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printf(" devices: ");
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for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if ((1 << i) & devmask) {
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if (n)
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printf(", ");
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printf("%s", names[i]);
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n++;
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}
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}
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if (recmask != 0) {
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printf("\n rec devices: ");
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for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if ((1 << i) & recmask) {
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if (n)
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printf(", ");
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printf("%s", names[i]);
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n++;
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}
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}
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printf("\n");
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exit(1);
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}
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static int
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res_name(const char *name, int mask)
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{
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int foo;
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for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
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if ((1 << foo) & mask && strcmp(names[foo], name) == 0)
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break;
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return (foo == SOUND_MIXER_NRDEVICES ? -1 : foo);
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}
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static void
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print_recsrc(int recsrc, int recmask, int sflag)
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{
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int i, n;
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if (recmask == 0)
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return;
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if (!sflag)
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printf("Recording source: ");
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for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if ((1 << i) & recsrc) {
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if (sflag)
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printf("%srec ", n ? " +" : "=");
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else if (n)
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printf(", ");
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printf("%s", names[i]);
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n++;
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}
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if (!sflag)
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printf("\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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char mixer[PATH_MAX] = "/dev/mixer";
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char lstr[5], rstr[5];
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char *name, *eptr;
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int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
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int dusage = 0, drecsrc = 0, sflag = 0, Sflag = 0;
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int l, r, lrel, rrel;
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int ch, foo, bar, baz, dev, m, n, t;
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if ((name = strdup(basename(argv[0]))) == NULL)
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err(1, "strdup()");
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if (strncmp(name, "mixer", 5) == 0 && name[5] != '\0') {
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n = strtol(name + 5, &eptr, 10) - 1;
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if (n > 0 && *eptr == '\0')
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snprintf(mixer, PATH_MAX - 1, "/dev/mixer%d", n);
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}
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free(name);
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name = mixer;
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n = 1;
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for (;;) {
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if (n >= argc || *argv[n] != '-')
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break;
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if (strlen(argv[n]) != 2) {
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if (strcmp(argv[n] + 1, "rec") != 0)
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dusage = 1;
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break;
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}
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ch = *(argv[n] + 1);
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if (ch == 'f' && n < argc - 1) {
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name = argv[n + 1];
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n += 2;
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} else if (ch == 's') {
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sflag = 1;
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n++;
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} else if (ch == 'S') {
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Sflag = 1;
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n++;
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} else {
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dusage = 1;
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break;
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}
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}
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if (sflag && Sflag)
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dusage = 1;
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argc -= n - 1;
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argv += n - 1;
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if ((baz = open(name, O_RDWR)) < 0)
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err(1, "%s", name);
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if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
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err(1, "SOUND_MIXER_READ_DEVMASK");
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if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
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err(1, "SOUND_MIXER_READ_RECMASK");
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if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
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err(1, "SOUND_MIXER_READ_RECSRC");
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orecsrc = recsrc;
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if (argc == 1 && dusage == 0) {
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for (foo = 0, n = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
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if (!((1 << foo) & devmask))
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continue;
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if (ioctl(baz, MIXER_READ(foo),&bar) == -1) {
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warn("MIXER_READ");
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continue;
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}
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if (Sflag || sflag) {
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printf("%s%s%c%d:%d", n ? " " : "",
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names[foo], Sflag ? ':' : ' ',
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bar & 0x7f, (bar >> 8) & 0x7f);
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n++;
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} else
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printf("Mixer %-8s is currently set to "
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"%3d:%d\n", names[foo], bar & 0x7f,
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(bar >> 8) & 0x7f);
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}
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if (n && recmask)
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printf(" ");
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print_recsrc(recsrc, recmask, Sflag || sflag);
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return (0);
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}
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argc--;
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argv++;
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n = 0;
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while (argc > 0 && dusage == 0) {
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if (strcmp("recsrc", *argv) == 0) {
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drecsrc = 1;
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argc--;
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argv++;
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continue;
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} else if (argc > 1 && strcmp("rec", *argv + 1) == 0) {
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if (**argv != '+' && **argv != '-' &&
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**argv != '=' && **argv != '^') {
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warnx("unknown modifier: %c", **argv);
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dusage = 1;
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break;
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}
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if ((dev = res_name(argv[1], recmask)) == -1) {
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warnx("unknown recording device: %s", argv[1]);
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dusage = 1;
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break;
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}
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switch (**argv) {
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case '+':
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recsrc |= (1 << dev);
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break;
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case '-':
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recsrc &= ~(1 << dev);
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break;
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case '=':
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recsrc = (1 << dev);
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break;
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case '^':
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recsrc ^= (1 << dev);
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break;
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}
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drecsrc = 1;
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argc -= 2;
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argv += 2;
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continue;
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}
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if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0)
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dev = 0;
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else if ((dev = res_name(*argv, devmask)) == -1) {
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warnx("unknown device: %s", *argv);
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dusage = 1;
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break;
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}
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lrel = rrel = 0;
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if (argc > 1) {
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m = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
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if (m > 0) {
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if (*lstr == '+' || *lstr == '-')
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lrel = rrel = 1;
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l = strtol(lstr, NULL, 10);
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}
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if (m > 1) {
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if (*rstr == '+' || *rstr == '-')
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rrel = 1;
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r = strtol(rstr, NULL, 10);
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}
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}
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switch (argc > 1 ? m : t) {
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case 0:
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if (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
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warn("MIXER_READ");
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argc--;
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argv++;
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continue;
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}
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if (Sflag || sflag) {
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printf("%s%s%c%d:%d", n ? " " : "",
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names[dev], Sflag ? ':' : ' ',
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bar & 0x7f, (bar >> 8) & 0x7f);
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n++;
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} else
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printf("Mixer %-8s is currently set to "
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"%3d:%d\n", names[dev], bar & 0x7f,
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(bar >> 8) & 0x7f);
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argc--;
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argv++;
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break;
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case 1:
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r = l;
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/* FALLTHROUGH */
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case 2:
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if (ioctl(baz, MIXER_READ(dev), &bar) == -1) {
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warn("MIXER_READ");
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argc--;
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argv++;
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continue;
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}
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if (lrel)
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l = (bar & 0x7f) + l;
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if (rrel)
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r = ((bar >> 8) & 0x7f) + r;
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if (l < 0)
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l = 0;
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else if (l > 100)
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l = 100;
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if (r < 0)
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r = 0;
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else if (r > 100)
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r = 100;
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if (!Sflag)
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printf("Setting the mixer %s from %d:%d to "
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"%d:%d.\n", names[dev], bar & 0x7f,
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(bar >> 8) & 0x7f, l, r);
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l |= r << 8;
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if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
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warn("WRITE_MIXER");
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argc -= 2;
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argv += 2;
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break;
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}
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}
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if (dusage) {
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close(baz);
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usage(devmask, recmask);
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/* NOTREACHED */
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}
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if (orecsrc != recsrc) {
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if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
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err(1, "SOUND_MIXER_WRITE_RECSRC");
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if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
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err(1, "SOUND_MIXER_READ_RECSRC");
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}
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if (drecsrc)
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print_recsrc(recsrc, recmask, Sflag || sflag);
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close(baz);
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return (0);
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}
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