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 1.3 2004/01/06 08:35:42 asmodai 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 #define LEFT(vol) (vol & 0x7f)
  26 #define RIGHT(vol) ((vol >> 8) & 0x7f)
  27
  28 const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  29 const char *defaultdev = "/dev/mixer";
  30
  31 void usage(int devmask, int recmask);
  32 int res_name(const char *name, int mask);
  33 void print_recsrc(int recsrc);
  34
  35 void
  36 usage(int devmask, int recmask)
  37 {
  38         int i, n;
  39
  40         printf("usage: mixer [-f device] [-s] [dev [+|-][voll[:[+|-]volr]] ...\n"
  41                "       mixer [-f device] [-s] recsrc ...\n"
  42                "       mixer [-f device] [-s] {^|+|-|=}rec recdev ...\n"
  43                "       mixer -h\n");
  44         printf(" devices: ");
  45         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  46                 if ((1 << i) & devmask)  {
  47                         if (n)
  48                                 printf(", ");
  49                         printf("%s", names[i]);
  50                         n = 1;
  51                 }
  52         printf("\n rec devices: ");
  53         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++)
  54                 if ((1 << i) & recmask)  {
  55                         if (n)
  56                                 printf(", ");
  57                         printf("%s", names[i]);
  58                         n = 1;
  59                 }
  60         printf("\n");
  61         exit(1);
  62 }
  63
  64 int
  65 res_name(const char *name, int mask)
  66 {
  67         int i;
  68
  69         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  70                 if ((1 << i) & mask && !strcmp(names[i], name))
  71                         break;
  72
  73         return i == SOUND_MIXER_NRDEVICES ? -1 : i;
  74 }
  75
  76 void
  77 print_recsrc(int recsrc)
  78 {
  79         int i, n = 0;
  80         fprintf(stderr, "Recording source: ");
  81
  82         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  83                 if ((1 << i) & recsrc) {
  84                         if (n)
  85                                 fprintf(stderr, ", ");
  86                         fprintf(stderr, "%s", names[i]);
  87                         n = 1;
  88                 }
  89         fprintf(stderr, "\n");
  90 }
  91
  92 int
  93 main(int argc, char *argv[])
  94 {
  95         int i, mset, fd, dev;
  96         int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
  97         int dusage = 0, drecsrc = 0, shortflag = 0;
  98         int l = 0, r = 0, t = 0;
  99         int n = 0, lrel = 0, rrel = 0;
 100         char lstr[8], rstr[8];
 101         char ch;
 102
 103         const char *name = defaultdev;
 104
 105         while ((ch = getopt(argc, argv, "f:sh")) != -1)
 106                 switch (ch) {
 107                         case 'f':
 108                                 name = optarg;
 109                                 break;
 110                         case 's':
 111                                 shortflag = 1;
 112                                 break;
 113                         case 'h': /* Fall through */
 114                         default:
 115                                 dusage = 1;
 116                 }
 117         argc -= optind;
 118         argv += optind;
 119
 120         if ((fd = open(name, O_RDWR)) < 0)
 121                 err(1, "%s", name);
 122         if (ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 123                 err(1, "SOUND_MIXER_READ_DEVMASK");
 124         if (ioctl(fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 125                 err(1, "SOUND_MIXER_READ_RECMASK");
 126         if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 127                 err(1, "SOUND_MIXER_READ_RECSRC");
 128         orecsrc = recsrc;
 129
 130         if (dusage) {
 131                 close(fd);
 132                 usage(devmask, recmask); /* Does not return */
 133         }
 134
 135         if (argc == 0) {
 136                 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
 137                         if (!((1 << i) & devmask))
 138                                 continue;
 139                         if (ioctl(fd, MIXER_READ(i),&mset)== -1) {
 140                                 warn("MIXER_READ");
 141                                 continue;
 142                         }
 143                         if (shortflag)
 144                                 printf("%s %d:%d ", names[i], LEFT(mset),
 145                                                 RIGHT(mset));
 146                         else
 147                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 148                                                 names[i], LEFT(mset), RIGHT(mset));
 149                 }
 150                 if(shortflag && isatty(STDOUT_FILENO))
 151                         printf("\n");
 152                 if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 153                         err(1, "SOUND_MIXER_READ_RECSRC");
 154                 print_recsrc(recsrc);
 155                 exit(0);
 156         }
 157
 158
 159
 160         while (argc > 0) {
 161                 if (!strcmp("recsrc", *argv)) {
 162                         drecsrc = 1;
 163                         argc--; argv++;
 164                         continue;
 165                 } else if (argc > 1 && !strcmp("rec", *argv + 1)) {
 166                         if (**argv != '+' && **argv != '-' &&
 167                             **argv != '=' && **argv != '^') {
 168                                 warnx("unknown modifier: %c", **argv);
 169                                 dusage = 1;
 170                                 break;
 171                         }
 172                         if ((dev = res_name(argv[1], recmask)) == -1) {
 173                                 warnx("unknown recording device: %s", argv[1]);
 174                                 dusage = 1;
 175                                 break;
 176                         }
 177                         switch(**argv) {
 178                         case '+':
 179                                 recsrc |= (1 << dev);
 180                                 break;
 181                         case '-':
 182                                 recsrc &= ~(1 << dev);
 183                                 break;
 184                         case '=':
 185                                 recsrc = (1 << dev);
 186                                 break;
 187                         case '^':
 188                                 recsrc ^= (1 << dev);
 189                                 break;
 190                         }
 191                         drecsrc = 1;
 192                         argc -= 2; argv += 2;
 193                         continue;
 194                 }
 195
 196                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
 197                         dev = 0;
 198                 }
 199                 else if((dev = res_name(*argv, devmask)) == -1) {
 200                         warnx("unknown device: %s", *argv);
 201                         dusage = 1;
 202                         break;
 203                 }
 204
 205 #define issign(c)       (((c) == '+') || ((c) == '-'))
 206
 207                 if (argc > 1) {
 208                         n = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
 209                         if (n > 0) {
 210                                 if (issign(lstr[0]))
 211                                         lrel = rrel = 1;
 212                                 l = atoi(lstr);
 213                         }
 214                         if (n > 1) {
 215                                 rrel = 0;
 216                                 if (issign(rstr[0]))
 217                                         rrel = 1;
 218                                 r = atoi(rstr);
 219                         }
 220                 }
 221
 222                 switch(argc > 1 ? n : t) {
 223                 case 0:
 224                         if (ioctl(fd, MIXER_READ(dev),&mset)== -1) {
 225                                 warn("MIXER_READ");
 226                                 argc--; argv++;
 227                                 continue;
 228                         }
 229                         if (shortflag)
 230                                 printf("%s %d:%d ", names[dev], LEFT(mset), RIGHT(mset));
 231                         else
 232                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 233                                   names[dev], LEFT(mset), RIGHT(mset));
 234
 235                         argc--; argv++;
 236                         break;
 237                 case 1:
 238                         r = l;
 239                 case 2:
 240                         if (ioctl(fd, MIXER_READ(dev),&mset)== -1) {
 241                                 warn("MIXER_READ");
 242                                 argc--; argv++;
 243                                 continue;
 244                         }
 245
 246                         if (lrel)
 247                                 l += LEFT(mset);
 248                         if (rrel)
 249                                 r += RIGHT(mset);
 250
 251                         if (l < 0)
 252                                 l = 0;
 253                         else if (l > 100)
 254                                 l = 100;
 255                         if (r < 0)
 256                                 r = 0;
 257                         else if (r > 100)
 258                                 r = 100;
 259
 260                         printf("Setting the mixer %s to %d:%d.\n", names[dev],
 261                             l, r);
 262
 263                         l |= r << 8;
 264                         if (ioctl(fd, MIXER_WRITE(dev), &l) == -1)
 265                                 warn("WRITE_MIXER");
 266
 267                         argc -= 2; argv += 2;
 268                         break;
 269                 }
 270         }
 271
 272         if (orecsrc != recsrc)
 273                 if (ioctl(fd, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 274                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 275
 276         if (drecsrc) {
 277                 if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 278                         err(1, "SOUND_MIXER_READ_RECSRC");
 279                 print_recsrc(recsrc);
 280         }
 281
 282         close(fd);
 283
 284         exit(0);
 285 }