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 #include <sys/cdefs.h>
  15 __FBSDID("$FreeBSD$");
  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, int shortflag);
  30
  31 void
  32 usage(int devmask, int recmask)
  33 {
  34         int i, n;
  35
  36         printf("usage: mixer [-f device] [-s | -S] [dev [+|-][voll[:[+|-]volr]] ...\n"
  37                "       mixer [-f device] [-s | -S] recsrc ...\n"
  38                "       mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ... \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, int shortflag)
  73 {
  74         int i, n = 0;
  75
  76         if (!shortflag)
  77                 printf("Recording source: ");
  78
  79         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  80                 if ((1 << i) & recsrc) {
  81                         if (shortflag) {
  82                                 if (n)
  83                                         printf(" +rec ");
  84                                 else
  85                                         printf("=rec ");
  86                         } else if (n)
  87                                 printf(", ");
  88                         printf("%s", names[i]);
  89                         n = 1;
  90                 }
  91         if (!shortflag)
  92                 printf("\n");
  93 }
  94
  95 int
  96 main(int argc, char *argv[])
  97 {
  98         int foo, bar, baz, dev;
  99         int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
 100         int dusage = 0, drecsrc = 0, shortflag = 0, Shortflag = 0;
 101         int l = 0, r = 0, t = 0;
 102         char lstr[5], rstr[5];
 103         int n = 0, lrel = 0, rrel = 0;
 104         int ch;
 105
 106         char *name;
 107
 108         name = "/dev/mixer";
 109
 110         if (!strcmp(argv[0], "mixer2"))
 111                 name = "/dev/mixer1";
 112         else if (!strcmp(argv[0], "mixer3"))
 113                 name = "/dev/mixer2";
 114
 115         while ((ch = getopt(argc, argv, "f:sS")) != -1)
 116                 switch (ch) {
 117                         case 'f':
 118                                 name = optarg;
 119                                 break;
 120                         case 's':
 121                                 shortflag = 1;
 122                                 break;
 123                         case 'S':
 124                                 Shortflag = 1;
 125                                 break;
 126                         default:
 127                                 dusage = 1;
 128                 }
 129         argc -= (optind - 1);
 130         argv += (optind - 1);
 131
 132         if ((baz = open(name, O_RDWR)) < 0)
 133                 err(1, "%s", name);
 134         if (ioctl(baz, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 135                 err(1, "SOUND_MIXER_READ_DEVMASK");
 136         if (ioctl(baz, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 137                 err(1, "SOUND_MIXER_READ_RECMASK");
 138         if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 139                 err(1, "SOUND_MIXER_READ_RECSRC");
 140         orecsrc = recsrc;
 141
 142         if ((argc == 1) && (dusage == 0)) {
 143                 for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++) {
 144                         if (!((1 << foo) & devmask))
 145                                 continue;
 146                         if (ioctl(baz, MIXER_READ(foo),&bar)== -1) {
 147                                 warn("MIXER_READ");
 148                                 continue;
 149                         }
 150                         if (Shortflag)
 151                                 printf("%s:%d:%d ", names[foo], bar & 0x7f,
 152                                        (bar >> 8) & 0x7f);
 153                         else if (shortflag)
 154                                 printf("%s %d:%d ", names[foo], bar & 0x7f,
 155                                        (bar >> 8) & 0x7f);
 156                         else
 157                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 158                                        names[foo], bar & 0x7f, (bar >> 8) & 0x7f);
 159                 }
 160                 if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 161                         err(1, "SOUND_MIXER_READ_RECSRC");
 162                 print_recsrc(recsrc, shortflag || Shortflag);
 163                 return(0);
 164         }
 165
 166         argc--; argv++;
 167
 168         while ((argc > 0) && (dusage == 0)) {
 169                 if (!strcmp("recsrc", *argv)) {
 170                         drecsrc = 1;
 171                         argc--; argv++;
 172                         continue;
 173                 } else if (argc > 1 && !strcmp("rec", *argv + 1)) {
 174                         if (**argv != '+' && **argv != '-' &&
 175                             **argv != '=' && **argv != '^') {
 176                                 warnx("unknown modifier: %c", **argv);
 177                                 dusage = 1;
 178                                 break;
 179                         }
 180                         if ((dev = res_name(argv[1], recmask)) == -1) {
 181                                 warnx("unknown recording device: %s", argv[1]);
 182                                 dusage = 1;
 183                                 break;
 184                         }
 185                         switch(**argv) {
 186                         case '+':
 187                                 recsrc |= (1 << dev);
 188                                 break;
 189                         case '-':
 190                                 recsrc &= ~(1 << dev);
 191                                 break;
 192                         case '=':
 193                                 recsrc = (1 << dev);
 194                                 break;
 195                         case '^':
 196                                 recsrc ^= (1 << dev);
 197                                 break;
 198                         }
 199                         drecsrc = 1;
 200                         argc -= 2; argv += 2;
 201                         continue;
 202                 }
 203
 204                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
 205                         dev = 0;
 206                 }
 207                 else if((dev = res_name(*argv, devmask)) == -1) {
 208                         warnx("unknown device: %s", *argv);
 209                         dusage = 1;
 210                         break;
 211                 }
 212
 213 #define issign(c)       (((c) == '+') || ((c) == '-'))
 214
 215                 if (argc > 1) {
 216                         n = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
 217                         if (n > 0) {
 218                                 if (issign(lstr[0]))
 219                                         lrel = rrel = 1;
 220                                 l = atoi(lstr);
 221                         }
 222                         if (n > 1) {
 223                                 rrel = 0;
 224                                 if (issign(rstr[0]))
 225                                         rrel = 1;
 226                                 r = atoi(rstr);
 227                         }
 228                 }
 229
 230                 switch(argc > 1 ? n : t) {
 231                 case 0:
 232                         if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
 233                                 warn("MIXER_READ");
 234                                 argc--; argv++;
 235                                 continue;
 236                         }
 237                         if (Shortflag)
 238                                 printf("%s:%d:%d ", names[dev], bar & 0x7f,
 239                                        (bar >> 8) & 0x7f);
 240                         else if (shortflag)
 241                                 printf("%s %d:%d ", names[dev], bar & 0x7f,
 242                                        (bar >> 8) & 0x7f);
 243                         else
 244                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 245                                   names[dev], bar & 0x7f, (bar >> 8) & 0x7f);
 246
 247                         argc--; argv++;
 248                         break;
 249                 case 1:
 250                         r = l;
 251                 case 2:
 252                         if (ioctl(baz, MIXER_READ(dev),&bar)== -1) {
 253                                 warn("MIXER_READ");
 254                                 argc--; argv++;
 255                                 continue;
 256                         }
 257
 258                         if (lrel)
 259                                 l = (bar & 0x7f) + l;
 260                         if (rrel)
 261                                 r = ((bar >> 8) & 0x7f) + r;
 262
 263                         if (l < 0)
 264                                 l = 0;
 265                         else if (l > 100)
 266                                 l = 100;
 267                         if (r < 0)
 268                                 r = 0;
 269                         else if (r > 100)
 270                                 r = 100;
 271
 272                         if (!Shortflag)
 273                                 printf("Setting the mixer %s from %d:%d to %d:%d.\n",
 274                                        names[dev], bar & 0x7f, (bar >> 8) & 0x7f, l, r);
 275
 276                         l |= r << 8;
 277                         if (ioctl(baz, MIXER_WRITE(dev), &l) == -1)
 278                                 warn("WRITE_MIXER");
 279
 280                         argc -= 2; argv += 2;
 281                         break;
 282                 }
 283         }
 284
 285         if (dusage) {
 286                 close(baz);
 287                 usage(devmask, recmask);
 288                 /* Not reached */
 289         }
 290
 291         if (orecsrc != recsrc)
 292                 if (ioctl(baz, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 293                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 294
 295         if (drecsrc) {
 296                 if (ioctl(baz, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 297                         err(1, "SOUND_MIXER_READ_RECSRC");
 298                 print_recsrc(recsrc, shortflag || Shortflag);
 299         }
 300
 301         close(baz);
 302
 303         exit(0);
 304 }