usr.sbin/mixer/mixer.c

   1 /*
   2  *      This is an example of a mixer program for Linux
   3  *
   4  *      updated 1/1/93 to add stereo, level query, broken
   5  *              devmask kludge - cmetz@thor.tjhsst.edu
   6  *
   7  * (C) Craig Metz and Hannu Savolainen 1993.
   8  *
   9  * You may do anything you wish with this program.
  10  *
  11  * ditto for my modifications (John-Mark Gurney, 1997)
  12  */
  13
  14 #ifndef lint
  15 static const char rcsid[] =
  16   "$FreeBSD: src/usr.sbin/mixer/mixer.c,v 1.11.2.6 2001/07/30 10:22:58 dd Exp $";
  17 #endif /* not lint */
  18
  19 #include <err.h>
  20 #include <fcntl.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/soundcard.h>
  26
  27 const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  28
  29 void usage(int devmask, int recmask);
  30 int res_name(const char *name, int mask);
  31 void print_recsrc(int recsrc);
  32
  33 void
  34 usage(int devmask, int recmask)
  35 {
  36         int i, n;
  37
  38         printf("usage: mixer [-f device] [-s] [[dev [voll[:volr]] | recsrc | {^|+|-|=}rec recdev] ... ]\n");
  39         printf(" devices: ");
  40         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  41                 if ((1 << i) & devmask)  {
  42                         if (n)
  43                                 printf(", ");
  44                         printf("%s", names[i]);
  45                         n = 1;
  46                 }
  47         printf("\n rec devices: ");
  48         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  49                 if ((1 << i) & recmask)  {
  50                         if (n)
  51                                 printf(", ");
  52                         printf("%s", names[i]);
  53                         n = 1;
  54                 }
  55         printf("\n");
  56         exit(1);
  57 }
  58
  59 int
  60 res_name(const char *name, int mask)
  61 {
  62         int foo;
  63
  64         for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
  65                 if ((1 << foo) & mask && !strcmp(names[foo], name))
  66                         break;
  67
  68         return foo == SOUND_MIXER_NRDEVICES ? -1 : foo;
  69 }
  70
  71 void
  72 print_recsrc(int recsrc)
  73 {
  74         int i, n = 0;
  75         fprintf(stderr, "Recording source: ");
  76
  77         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  78                 if ((1 << i) & recsrc) {
  79                         if (n)
  80                                 fprintf(stderr, ", ");
  81                         fprintf(stderr, "%s", names[i]);
  82                         n = 1;
  83                 }
  84         fprintf(stderr, "\n");
  85 }
  86
  87 int
  88 main(int argc, char *argv[])
  89 {
  90         int foo, bar, baz, dev;
  91         int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
  92         int dusage = 0, drecsrc = 0, shortflag = 0;
  93         int l = 0, r = 0, t = 0;
  94         char ch;
  95
  96         char *name;
  97
  98         name = strdup("/dev/mixer");
  99
 100         if (!strcmp(argv[0], "mixer2"))
 101                 name = strdup("/dev/mixer1");
 102         else if (!strcmp(argv[0], "mixer3"))
 103                 name = strdup("/dev/mixer2");
 104
 105         while ((ch = getopt(argc, argv, "f:s")) != -1)
 106                 switch (ch) {
 107                         case 'f':
 108                                 name = strdup(optarg);
 109                                 break;
 110                         case 's':
 111                                 shortflag = 1;
 112                                 break;
 113                         default:
 114                                 dusage = 1;
 115                 }
 116         argc -= (optind - 1);
 117         argv += (optind - 1);
 118
 119         if ((baz = open(name, O_RDWR)) < 0)
 120                 err(1, "%s", name);
 121         free(name);
 122         if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 123                 err(1, "SOUND_MIXER_READ_DEVMASK");
 124         if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 125                 err(1, "SOUND_MIXER_READ_RECMASK");
 126         if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 127                 err(1, "SOUND_MIXER_READ_RECSRC");
 128         orecsrc = recsrc;
 129
 130         if ((argc == 1) && (dusage == 0)) {
 131                 for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
 132                         if (!((1 << foo) & devmask))
 133                                 continue;
 134                         if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
 135                                 warn("MIXER_READ");
 136                                 continue;
 137                         }
 138                         if (shortflag)
 139                                 printf("%s %d:%d ", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
 140                         else
 141                                 printf("Mixer %-8s is currently set to %3d:%d\n", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
 142                 }
 143                 return(0);
 144         }
 145
 146         argc--; argv++;
 147
 148         while ((argc > 0) && (dusage == 0)) {
 149                 if (!strcmp("recsrc", *argv)) {
 150                         drecsrc = 1;
 151                         argc--; argv++;
 152                         continue;
 153                 } else if (argc > 1 && !strcmp("rec", *argv + 1)) {
 154                         if (**argv != '+' && **argv != '-' &&
 155                             **argv != '=' && **argv != '^') {
 156                                 warnx("unknown modifier: %c", **argv);
 157                                 dusage = 1;
 158                                 break;
 159                         }
 160                         if ((dev = res_name(argv[1], recmask)) == -1) {
 161                                 warnx("unknown recording device: %s", argv[1]);
 162                                 dusage = 1;
 163                                 break;
 164                         }
 165                         switch(**argv) {
 166                         case '+':
 167                                 recsrc |= (1 << dev);
 168                                 break;
 169                         case '-':
 170                                 recsrc &= ~(1 << dev);
 171                                 break;
 172                         case '=':
 173                                 recsrc = (1 << dev);
 174                                 break;
 175                         case '^':
 176                                 recsrc ^= (1 << dev);
 177                                 break;
 178                         }
 179                         drecsrc = 1;
 180                         argc -= 2; argv += 2;
 181                         continue;
 182                 }
 183
 184                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
 185                         dev = 0;
 186                 }
 187                 else if((dev = res_name(*argv, devmask)) == -1) {
 188                         warnx("unknown device: %s", *argv);
 189                         dusage = 1;
 190                         break;
 191                 }
 192
 193                 switch(argc > 1 ? sscanf(argv[1], "%d:%d", &l, &r) : t) {
 194                 case 0:
 195                         if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
 196                                 warn("MIXER_READ");
 197                                 argc--; argv++;
 198                                 continue;
 199                         }
 200                         if (shortflag)
 201                                 printf("%s %d:%d ", names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
 202                         else
 203                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 204                                   names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
 205
 206                         argc--; argv++;
 207                         break;
 208                 case 1:
 209                         r = l;
 210                 case 2:
 211                         if (l < 0)
 212                                 l = 0;
 213                         else if (l > 100)
 214                                 l = 100;
 215                         if (r < 0)
 216                                 r = 0;
 217                         else if (r > 100)
 218                                 r = 100;
 219
 220                         printf("Setting the mixer %s to %d:%d.\n", names[dev],
 221                             l, r);
 222
 223                         l |= r << 8;
 224                         if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
 225                                 warn("WRITE_MIXER");
 226
 227                         argc -= 2; argv += 2;
 228                         break;
 229                 }
 230         }
 231
 232         if (dusage) {
 233                 close(baz);
 234                 usage(devmask, recmask);
 235                 /* Not reached */
 236         }
 237
 238         if (orecsrc != recsrc)
 239                 if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 240                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 241
 242         if (drecsrc) {
 243                 if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 244                         err(1, "SOUND_MIXER_READ_RECSRC");
 245                 print_recsrc(recsrc);
 246         }
 247
 248         close(baz);
 249
 250         exit(0);
 251 }