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  * $FreeBSD: src/usr.sbin/mixer/mixer.c,v 1.11.2.6 2001/07/30 10:22:58 dd Exp $
  14  * $DragonFly: src/usr.sbin/mixer/mixer.c,v 1.2 2003/06/17 04:29:57 dillon Exp $
  15  */
  16
  17 #include <err.h>
  18 #include <fcntl.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <sys/soundcard.h>
  24
  25 const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  26
  27 void usage(int devmask, int recmask);
  28 int res_name(const char *name, int mask);
  29 void print_recsrc(int recsrc);
  30
  31 void
  32 usage(int devmask, int recmask)
  33 {
  34         int i, n;
  35
  36         printf("usage: mixer [-f device] [-s] [[dev [voll[:volr]] | recsrc | {^|+|-|=}rec recdev] ... ]\n");
  37         printf(" devices: ");
  38         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  39                 if ((1 << i) & devmask)  {
  40                         if (n)
  41                                 printf(", ");
  42                         printf("%s", names[i]);
  43                         n = 1;
  44                 }
  45         printf("\n rec devices: ");
  46         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  47                 if ((1 << i) & recmask)  {
  48                         if (n)
  49                                 printf(", ");
  50                         printf("%s", names[i]);
  51                         n = 1;
  52                 }
  53         printf("\n");
  54         exit(1);
  55 }
  56
  57 int
  58 res_name(const char *name, int mask)
  59 {
  60         int foo;
  61
  62         for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
  63                 if ((1 << foo) & mask && !strcmp(names[foo], name))
  64                         break;
  65
  66         return foo == SOUND_MIXER_NRDEVICES ? -1 : foo;
  67 }
  68
  69 void
  70 print_recsrc(int recsrc)
  71 {
  72         int i, n = 0;
  73         fprintf(stderr, "Recording source: ");
  74
  75         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  76                 if ((1 << i) & recsrc) {
  77                         if (n)
  78                                 fprintf(stderr, ", ");
  79                         fprintf(stderr, "%s", names[i]);
  80                         n = 1;
  81                 }
  82         fprintf(stderr, "\n");
  83 }
  84
  85 int
  86 main(int argc, char *argv[])
  87 {
  88         int foo, bar, baz, dev;
  89         int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
  90         int dusage = 0, drecsrc = 0, shortflag = 0;
  91         int l = 0, r = 0, t = 0;
  92         char ch;
  93
  94         char *name;
  95
  96         name = strdup("/dev/mixer");
  97
  98         if (!strcmp(argv[0], "mixer2"))
  99                 name = strdup("/dev/mixer1");
 100         else if (!strcmp(argv[0], "mixer3"))
 101                 name = strdup("/dev/mixer2");
 102
 103         while ((ch = getopt(argc, argv, "f:s")) != -1)
 104                 switch (ch) {
 105                         case 'f':
 106                                 name = strdup(optarg);
 107                                 break;
 108                         case 's':
 109                                 shortflag = 1;
 110                                 break;
 111                         default:
 112                                 dusage = 1;
 113                 }
 114         argc -= (optind - 1);
 115         argv += (optind - 1);
 116
 117         if ((baz = open(name, O_RDWR)) < 0)
 118                 err(1, "%s", name);
 119         free(name);
 120         if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 121                 err(1, "SOUND_MIXER_READ_DEVMASK");
 122         if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 123                 err(1, "SOUND_MIXER_READ_RECMASK");
 124         if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 125                 err(1, "SOUND_MIXER_READ_RECSRC");
 126         orecsrc = recsrc;
 127
 128         if ((argc == 1) && (dusage == 0)) {
 129                 for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
 130                         if (!((1 << foo) & devmask))
 131                                 continue;
 132                         if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
 133                                 warn("MIXER_READ");
 134                                 continue;
 135                         }
 136                         if (shortflag)
 137                                 printf("%s %d:%d ", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
 138                         else
 139                                 printf("Mixer %-8s is currently set to %3d:%d\n", names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
 140                 }
 141                 return(0);
 142         }
 143
 144         argc--; argv++;
 145
 146         while ((argc > 0) && (dusage == 0)) {
 147                 if (!strcmp("recsrc", *argv)) {
 148                         drecsrc = 1;
 149                         argc--; argv++;
 150                         continue;
 151                 } else if (argc > 1 && !strcmp("rec", *argv + 1)) {
 152                         if (**argv != '+' && **argv != '-' &&
 153                             **argv != '=' && **argv != '^') {
 154                                 warnx("unknown modifier: %c", **argv);
 155                                 dusage = 1;
 156                                 break;
 157                         }
 158                         if ((dev = res_name(argv[1], recmask)) == -1) {
 159                                 warnx("unknown recording device: %s", argv[1]);
 160                                 dusage = 1;
 161                                 break;
 162                         }
 163                         switch(**argv) {
 164                         case '+':
 165                                 recsrc |= (1 << dev);
 166                                 break;
 167                         case '-':
 168                                 recsrc &= ~(1 << dev);
 169                                 break;
 170                         case '=':
 171                                 recsrc = (1 << dev);
 172                                 break;
 173                         case '^':
 174                                 recsrc ^= (1 << dev);
 175                                 break;
 176                         }
 177                         drecsrc = 1;
 178                         argc -= 2; argv += 2;
 179                         continue;
 180                 }
 181
 182                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
 183                         dev = 0;
 184                 }
 185                 else if((dev = res_name(*argv, devmask)) == -1) {
 186                         warnx("unknown device: %s", *argv);
 187                         dusage = 1;
 188                         break;
 189                 }
 190
 191                 switch(argc > 1 ? sscanf(argv[1], "%d:%d", &l, &r) : t) {
 192                 case 0:
 193                         if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
 194                                 warn("MIXER_READ");
 195                                 argc--; argv++;
 196                                 continue;
 197                         }
 198                         if (shortflag)
 199                                 printf("%s %d:%d ", names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
 200                         else
 201                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 202                                   names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
 203
 204                         argc--; argv++;
 205                         break;
 206                 case 1:
 207                         r = l;
 208                 case 2:
 209                         if (l < 0)
 210                                 l = 0;
 211                         else if (l > 100)
 212                                 l = 100;
 213                         if (r < 0)
 214                                 r = 0;
 215                         else if (r > 100)
 216                                 r = 100;
 217
 218                         printf("Setting the mixer %s to %d:%d.\n", names[dev],
 219                             l, r);
 220
 221                         l |= r << 8;
 222                         if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
 223                                 warn("WRITE_MIXER");
 224
 225                         argc -= 2; argv += 2;
 226                         break;
 227                 }
 228         }
 229
 230         if (dusage) {
 231                 close(baz);
 232                 usage(devmask, recmask);
 233                 /* Not reached */
 234         }
 235
 236         if (orecsrc != recsrc)
 237                 if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 238                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 239
 240         if (drecsrc) {
 241                 if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 242                         err(1, "SOUND_MIXER_READ_RECSRC");
 243                 print_recsrc(recsrc);
 244         }
 245
 246         close(baz);
 247
 248         exit(0);
 249 }