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 1.6 2004/04/15 12:58:12 joerg 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 static const char *names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  29 static const char *defaultdev = "/dev/mixer";
  30
  31 static void     usage(int devmask, int recmask);
  32 static int      res_name(const char *name, int mask);
  33 static void     print_recsrc(int recsrc);
  34 static void     print_recsrc_short(int recsrc);
  35
  36 void
  37 usage(int devmask, int recmask)
  38 {
  39         int i, n;
  40
  41         printf("usage: mixer [-f device] [-s] [dev [+|-][voll[:[+|-]volr]] ...\n"
  42                "       mixer [-f device] [-s] recsrc ...\n"
  43                "       mixer [-f device] [-s] {^|+|-|=}rec recdev ...\n"
  44                "       mixer -h\n");
  45         printf(" devices: ");
  46         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  47                 if ((1 << i) & devmask)  {
  48                         if (n)
  49                                 printf(", ");
  50                         printf("%s", names[i]);
  51                         n = 1;
  52                 }
  53         }
  54         printf("\n rec devices: ");
  55         for (i = 0, n = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  56                 if ((1 << i) & recmask)  {
  57                         if (n)
  58                                 printf(", ");
  59                         printf("%s", names[i]);
  60                         n = 1;
  61                 }
  62         }
  63         printf("\n");
  64         exit(1);
  65 }
  66
  67 int
  68 res_name(const char *name, int mask)
  69 {
  70         int i;
  71
  72         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
  73                 if ((1 << i) & mask && !strcmp(names[i], name))
  74                         break;
  75
  76         if (i == SOUND_MIXER_NRDEVICES)
  77                 return(-1);
  78
  79         return(i);
  80 }
  81
  82 void
  83 print_recsrc(int recsrc)
  84 {
  85         int i, n = 0;
  86         printf("Recording source: ");
  87
  88         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
  89                 if ((1 << i) & recsrc) {
  90                         if (n)
  91                                 printf(", ");
  92                         printf("%s", names[i]);
  93                         n = 1;
  94                 }
  95         }
  96         printf("\n");
  97 }
  98
  99 void
 100 print_recsrc_short(int recsrc)
 101 {
 102         int i, first;
 103
 104         first = 1;
 105
 106         for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
 107                 if ((1 << i) & recsrc) {
 108                         if (first) {
 109                                 printf("=rec ");
 110                                 first = 0;
 111                         }
 112                         printf("%s ", names[i]);
 113                 }
 114         }
 115 }
 116
 117 int
 118 main(int argc, char **argv)
 119 {
 120         int i, mset, fd, dev;
 121         int devmask = 0, recmask = 0, recsrc = 0, orecsrc;
 122         int dusage = 0, drecsrc = 0, shortflag = 0;
 123         int l = 0, r = 0, t = 0;
 124         int n = 0, lrel = 0, rrel = 0;
 125         char lstr[8], rstr[8];
 126         char ch;
 127
 128         const char *name = defaultdev;
 129
 130         while ((ch = getopt(argc, argv, "f:sh")) != -1)
 131                 switch (ch) {
 132                         case 'f':
 133                                 name = optarg;
 134                                 break;
 135                         case 's':
 136                                 shortflag = 1;
 137                                 break;
 138                         case 'h': /* Fall through */
 139                         default:
 140                                 dusage = 1;
 141                 }
 142         argc -= optind;
 143         argv += optind;
 144
 145         if ((fd = open(name, O_RDWR)) < 0)
 146                 err(1, "%s", name);
 147         if (ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 148                 err(1, "SOUND_MIXER_READ_DEVMASK");
 149         if (ioctl(fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 150                 err(1, "SOUND_MIXER_READ_RECMASK");
 151         if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 152                 err(1, "SOUND_MIXER_READ_RECSRC");
 153         orecsrc = recsrc;
 154
 155         if (dusage) {
 156                 close(fd);
 157                 usage(devmask, recmask); /* Does not return */
 158         }
 159
 160         if (argc == 0) {
 161                 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
 162                         if (!((1 << i) & devmask))
 163                                 continue;
 164                         if (ioctl(fd, MIXER_READ(i),&mset)== -1) {
 165                                 warn("MIXER_READ");
 166                                 continue;
 167                         }
 168                         if (shortflag)
 169                                 printf("%s %d:%d ", names[i], LEFT(mset),
 170                                        RIGHT(mset));
 171                         else
 172                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 173                                        names[i], LEFT(mset), RIGHT(mset));
 174                 }
 175                 if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 176                         err(1, "SOUND_MIXER_READ_RECSRC");
 177                 if (shortflag) {
 178                         print_recsrc_short(recsrc);
 179                         if (isatty(STDOUT_FILENO))
 180                                 printf("\n");
 181                 } else
 182                         print_recsrc(recsrc);
 183                 exit(0);
 184         }
 185
 186
 187
 188         while (argc > 0) {
 189                 if (!strcmp("recsrc", *argv)) {
 190                         drecsrc = 1;
 191                         argc--; argv++;
 192                         continue;
 193                 } else if (argc > 1 && !strcmp("rec", *argv + 1)) {
 194                         if (**argv != '+' && **argv != '-' &&
 195                             **argv != '=' && **argv != '^') {
 196                                 warnx("unknown modifier: %c", **argv);
 197                                 dusage = 1;
 198                                 break;
 199                         }
 200                         if ((dev = res_name(argv[1], recmask)) == -1) {
 201                                 warnx("unknown recording device: %s", argv[1]);
 202                                 dusage = 1;
 203                                 break;
 204                         }
 205                         switch(**argv) {
 206                         case '+':
 207                                 recsrc |= (1 << dev);
 208                                 break;
 209                         case '-':
 210                                 recsrc &= ~(1 << dev);
 211                                 break;
 212                         case '=':
 213                                 recsrc = (1 << dev);
 214                                 break;
 215                         case '^':
 216                                 recsrc ^= (1 << dev);
 217                                 break;
 218                         }
 219                         drecsrc = 1;
 220                         argc -= 2; argv += 2;
 221                         continue;
 222                 }
 223
 224                 if ((t = sscanf(*argv, "%d:%d", &l, &r)) > 0) {
 225                         dev = 0;
 226                 }
 227                 else if((dev = res_name(*argv, devmask)) == -1) {
 228                         warnx("unknown device: %s", *argv);
 229                         dusage = 1;
 230                         break;
 231                 }
 232
 233 #define issign(c)       (((c) == '+') || ((c) == '-'))
 234
 235                 if (argc > 1) {
 236                         n = sscanf(argv[1], "%7[^:]:%7s", lstr, rstr);
 237                         if (n > 0) {
 238                                 if (issign(lstr[0]))
 239                                         lrel = rrel = 1;
 240                                 l = atoi(lstr);
 241                         }
 242                         if (n > 1) {
 243                                 rrel = 0;
 244                                 if (issign(rstr[0]))
 245                                         rrel = 1;
 246                                 r = atoi(rstr);
 247                         }
 248                 }
 249
 250                 switch(argc > 1 ? n : t) {
 251                 case 0:
 252                         if (ioctl(fd, MIXER_READ(dev),&mset)== -1) {
 253                                 warn("MIXER_READ");
 254                                 argc--; argv++;
 255                                 continue;
 256                         }
 257                         if (shortflag)
 258                                 printf("%s %d:%d ", names[dev], LEFT(mset),
 259                                        RIGHT(mset));
 260                         else
 261                                 printf("Mixer %-8s is currently set to %3d:%d\n",
 262                                        names[dev], LEFT(mset), RIGHT(mset));
 263
 264                         argc--; argv++;
 265                         break;
 266                 case 1:
 267                         r = l;
 268                 case 2:
 269                         if (ioctl(fd, MIXER_READ(dev),&mset)== -1) {
 270                                 warn("MIXER_READ");
 271                                 argc--; argv++;
 272                                 continue;
 273                         }
 274
 275                         if (lrel)
 276                                 l += LEFT(mset);
 277                         if (rrel)
 278                                 r += RIGHT(mset);
 279
 280                         if (l < 0)
 281                                 l = 0;
 282                         else if (l > 100)
 283                                 l = 100;
 284                         if (r < 0)
 285                                 r = 0;
 286                         else if (r > 100)
 287                                 r = 100;
 288
 289                         printf("Setting the mixer %s to %d:%d.\n", names[dev],
 290                                l, r);
 291
 292                         l |= r << 8;
 293                         if (ioctl(fd, MIXER_WRITE(dev), &l) == -1)
 294                                 warn("WRITE_MIXER");
 295
 296                         argc -= 2; argv += 2;
 297                         break;
 298                 }
 299         }
 300
 301         if (orecsrc != recsrc)
 302                 if (ioctl(fd, SOUND_MIXER_WRITE_RECSRC, &recsrc) == -1)
 303                         err(1, "SOUND_MIXER_WRITE_RECSRC");
 304
 305         if (drecsrc) {
 306                 if (ioctl(fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 307                         err(1, "SOUND_MIXER_READ_RECSRC");
 308                 print_recsrc(recsrc);
 309         }
 310
 311         close(fd);
 312
 313         exit(0);
 314 }