dist/ntp/libntp/audio.c

   1 /*      $NetBSD: audio.c,v 1.3 2003/12/04 16:23:36 drochner Exp $       */
   2
   3 /*
   4  * audio.c - audio interface for reference clock audio drivers
   5  */
   6 #ifdef HAVE_CONFIG_H
   7 # include <config.h>
   8 #endif
   9
  10 #if defined(HAVE_SYS_AUDIOIO_H) || defined(HAVE_SUN_AUDIOIO_H) || \
  11     defined(HAVE_SYS_SOUNDCARD_H) || defined(HAVE_MACHINE_SOUNDCARD_H)
  12
  13 #include "audio.h"
  14 #include "ntp_stdlib.h"
  15 #include "ntp_syslog.h"
  16 #ifdef HAVE_UNISTD_H
  17 # include <unistd.h>
  18 #endif
  19 #include <stdio.h>
  20 #include "ntp_string.h"
  21
  22 #ifdef HAVE_SYS_AUDIOIO_H
  23 # include <sys/audioio.h>
  24 #endif /* HAVE_SYS_AUDIOIO_H */
  25
  26 #ifdef HAVE_SUN_AUDIOIO_H
  27 # include <sys/ioccom.h>
  28 # include <sun/audioio.h>
  29 #endif /* HAVE_SUN_AUDIOIO_H */
  30
  31 #ifdef HAVE_SYS_IOCTL_H
  32 # include <sys/ioctl.h>
  33 #endif /* HAVE_SYS_IOCTL_H */
  34
  35 #include <fcntl.h>
  36
  37 #ifdef HAVE_MACHINE_SOUNDCARD_H
  38 # include <machine/soundcard.h>
  39 # define PCM_STYLE_SOUND
  40 #else
  41 # ifdef HAVE_SYS_SOUNDCARD_H
  42 #  include <sys/soundcard.h>
  43 #  define PCM_STYLE_SOUND
  44 # endif
  45 #endif
  46
  47 #ifdef PCM_STYLE_SOUND
  48 # include <ctype.h>
  49 #endif
  50
  51 /*
  52  * Global variables
  53  */
  54 #ifdef HAVE_SYS_AUDIOIO_H
  55 static struct audio_device device; /* audio device ident */
  56 #endif /* HAVE_SYS_AUDIOIO_H */
  57 #ifdef PCM_STYLE_SOUND
  58 # define INIT_FILE "/etc/ntp.audio"
  59 int agc =       SOUND_MIXER_WRITE_RECLEV; /* or IGAIN or LINE */
  60 int monitor =   SOUND_MIXER_WRITE_VOLUME; /* or OGAIN */
  61 int devmask = 0;
  62 int recmask = 0;
  63 char cf_c_dev[100], cf_i_dev[100], cf_agc[100], cf_monitor[100];
  64
  65 const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
  66 #else /* not PCM_STYLE_SOUND */
  67 static struct audio_info info;  /* audio device info */
  68 #endif /* not PCM_STYLE_SOUND */
  69 static int ctl_fd;              /* audio control file descriptor */
  70
  71 #ifdef PCM_STYLE_SOUND
  72 static void audio_config_read P((int, char **, char **));
  73 static int  mixer_name P((const char *, int));
  74
  75
  76 int
  77 mixer_name(
  78         const char *m_name,
  79         int m_mask
  80         )
  81 {
  82         int i;
  83
  84         for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
  85                 if (((1 << i) & m_mask)
  86                     && !strcmp(m_names[i], m_name))
  87                         break;
  88
  89         return (SOUND_MIXER_NRDEVICES == i)
  90             ? -1
  91             : i
  92             ;
  93 }
  94
  95
  96 /*
  97  * Check:
  98  *
  99  * /etc/ntp.audio#      where # is the unit number
 100  * /etc/ntp.audio.#     where # is the unit number
 101  * /etc/ntp.audio
 102  *
 103  * for contents of the form:
 104  *
 105  * idev /dev/input_device
 106  * cdev /dev/control_device
 107  * agc pcm_input_device {igain,line,line1,...}
 108  * monitor pcm_monitor_device {ogain,...}
 109  *
 110  * The device names for the "agc" and "monitor" keywords
 111  * can be found by running either the "mixer" program or the
 112  * util/audio-pcm program.
 113  *
 114  * Great hunks of this subroutine were swiped from refclock_oncore.c
 115  */
 116 static void
 117 audio_config_read(
 118         int unit,
 119         char **c_dev,   /* Control device */
 120         char **i_dev    /* input device */
 121         )
 122 {
 123         FILE *fd;
 124         char device[20], line[100], ab[100];
 125
 126         sprintf(device, "%s%d", INIT_FILE, unit);
 127         if ((fd = fopen(device, "r")) == NULL) {
 128                 printf("audio_config_read: <%s> NO\n", device);
 129                 sprintf(device, "%s.%d", INIT_FILE, unit);
 130                 if ((fd = fopen(device, "r")) == NULL) {
 131                         printf("audio_config_read: <%s> NO\n", device);
 132                         sprintf(device, "%s.%d", INIT_FILE, unit);
 133                         if ((fd = fopen(device, "r")) == NULL) {
 134                                 printf("audio_config_read: <%s> NO\n", device);
 135                                 return;
 136                         }
 137                 }
 138         }
 139         printf("audio_config_read: reading <%s>\n", device);
 140         while (fgets(line, sizeof line, fd)) {
 141                 char *cp, *cc, *ca;
 142                 int i;
 143
 144                 /* Remove comments */
 145                 if ((cp = strchr(line, '#')))
 146                         *cp = '\0';
 147
 148                 /* Remove any trailing spaces */
 149                 for (i = strlen(line);
 150                      i > 0 && isascii((int)line[i - 1]) && isspace((int)line[i - 1]);
 151                         )
 152                         line[--i] = '\0';
 153
 154                 /* Remove leading space */
 155                 for (cc = line; *cc && isascii((int)*cc) && isspace((int)*cc); cc++)
 156                         continue;
 157
 158                 /* Stop if nothing left */
 159                 if (!*cc)
 160                         continue;
 161
 162                 /* Uppercase the command and find the arg */
 163                 for (ca = cc; *ca; ca++) {
 164                         if (isascii((int)*ca)) {
 165                                 if (islower((int)*ca)) {
 166                                         *ca = toupper(*ca);
 167                                 } else if (isspace((int)*ca) || (*ca == '='))
 168                                         break;
 169                         }
 170                 }
 171
 172                 /* Remove space (and possible =) leading the arg */
 173                 for (; *ca && isascii((int)*ca) && (isspace((int)*ca) || (*ca == '=')); ca++)
 174                         continue;
 175
 176                 if (!strncmp(cc, "IDEV", (size_t) 4)) {
 177                         sscanf(ca, "%s", ab);
 178                         strcpy(cf_i_dev, ab);
 179                         printf("idev <%s>\n", ab);
 180                 } else if (!strncmp(cc, "CDEV", (size_t) 4)) {
 181                         sscanf(ca, "%s", ab);
 182                         strcpy(cf_c_dev, ab);
 183                         printf("cdev <%s>\n", ab);
 184                 } else if (!strncmp(cc, "AGC", (size_t) 3)) {
 185                         sscanf(ca, "%s", ab);
 186                         strcpy(cf_agc, ab);
 187                         printf("agc <%s> %d\n", ab, i);
 188                 } else if (!strncmp(cc, "MONITOR", (size_t) 7)) {
 189                         sscanf(ca, "%s", ab);
 190                         strcpy(cf_monitor, ab);
 191                         printf("monitor <%s> %d\n", ab, mixer_name(ab, -1));
 192                 }
 193         }
 194         fclose(fd);
 195         return;
 196 }
 197 #endif /* PCM_STYLE_SOUND */
 198
 199 /*
 200  * audio_init - open and initialize audio device
 201  *
 202  * This code works with SunOS 4.x, Solaris 2.x, and PCM; however, it is
 203  * believed generic and applicable to other systems with a minor twid
 204  * or two. All it does is open the device, set the buffer size (Solaris
 205  * only), preset the gain and set the input port. It assumes that the
 206  * codec sample rate (8000 Hz), precision (8 bits), number of channels
 207  * (1) and encoding (ITU-T G.711 mu-law companded) have been set by
 208  * default.
 209  */
 210 int
 211 audio_init(
 212         char    *dname,         /* device name */
 213         int     bufsiz,         /* buffer size */
 214         int     unit            /* device unit (0-3) */
 215         )
 216 {
 217 #ifdef PCM_STYLE_SOUND
 218 # define ACTL_DEV       "/dev/mixer%d"
 219         char actl_dev[30];
 220 # ifdef HAVE_STRUCT_SND_SIZE
 221         struct snd_size s_size;
 222 # endif
 223 # ifdef AIOGFMT
 224         snd_chan_param s_c_p;
 225 # endif
 226 #endif
 227         int fd;
 228         int rval;
 229         char *actl =
 230 #ifdef PCM_STYLE_SOUND
 231                 actl_dev
 232 #else
 233                 "/dev/audioctl"
 234 #endif
 235                 ;
 236
 237 #ifdef PCM_STYLE_SOUND
 238         (void)sprintf(actl_dev, ACTL_DEV, unit);
 239
 240         audio_config_read(unit, &actl, &dname);
 241         /* If we have values for cf_c_dev or cf_i_dev, use them. */
 242         if (*cf_c_dev)
 243                 actl = cf_c_dev;
 244         if (*cf_i_dev)
 245                 dname = cf_i_dev;
 246 #endif
 247
 248         /*
 249          * Open audio device. Do not complain if not there.
 250          */
 251         fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
 252         if (fd < 0)
 253                 return (fd);
 254
 255         /*
 256          * Open audio control device.
 257          */
 258         ctl_fd = open(actl, O_RDWR);
 259         if (ctl_fd < 0) {
 260                 msyslog(LOG_ERR, "audio_init: invalid control device <%s>\n", actl);
 261                 close(fd);
 262                 return(ctl_fd);
 263         }
 264
 265         /*
 266          * Set audio device parameters.
 267          */
 268 #ifdef PCM_STYLE_SOUND
 269         printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz);
 270         rval = fd;
 271
 272 # ifdef HAVE_STRUCT_SND_SIZE
 273         if (ioctl(fd, AIOGSIZE, &s_size) == -1)
 274             printf("audio_init: AIOGSIZE: %s\n", strerror(errno));
 275         else
 276             printf("audio_init: orig: play_size %d, rec_size %d\n",
 277                 s_size.play_size, s_size.rec_size);
 278
 279         s_size.play_size = s_size.rec_size = bufsiz;
 280         printf("audio_init: want: play_size %d, rec_size %d\n",
 281                s_size.play_size, s_size.rec_size);
 282
 283         if (ioctl(fd, AIOSSIZE, &s_size) == -1)
 284             printf("audio_init: AIOSSIZE: %s\n", strerror(errno));
 285         else
 286             printf("audio_init: set:  play_size %d, rec_size %d\n",
 287                 s_size.play_size, s_size.rec_size);
 288 # endif /* HAVE_STRUCT_SND_SIZE */
 289
 290 # ifdef SNDCTL_DSP_SETFRAGMENT
 291         {
 292                 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */
 293                 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
 294                     printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n",
 295                            strerror(errno));
 296         }
 297 # endif /* SNDCTL_DSP_SETFRAGMENT */
 298
 299 # ifdef AIOGFMT
 300         if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
 301             printf("audio_init: AIOGFMT: %s\n", strerror(errno));
 302         else
 303             printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
 304                 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
 305 # endif
 306
 307         /* Grab the device and record masks */
 308
 309         if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
 310             printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
 311         if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
 312             printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
 313
 314         /* validate and set any specified config file stuff */
 315         if (*cf_agc) {
 316                 int i;
 317
 318                 i = mixer_name(cf_agc, devmask);
 319                 if (i >= 0)
 320                         agc = MIXER_WRITE(i);
 321                 else
 322                         printf("input %s not in recmask %#x\n",
 323                                cf_agc, recmask);
 324         }
 325
 326         if (*cf_monitor) {
 327                 int i;
 328
 329                 /* devmask */
 330                 i = mixer_name(cf_monitor, devmask);
 331                 if (i >= 0)
 332                         monitor = MIXER_WRITE(i);
 333                 else
 334                         printf("monitor %s not in devmask %#x\n",
 335                                cf_monitor, devmask);
 336         }
 337
 338 #else /* not PCM_STYLE_SOUND */
 339         AUDIO_INITINFO(&info);
 340         info.play.gain = AUDIO_MAX_GAIN;
 341         info.play.port = AUDIO_SPEAKER;
 342 # ifdef HAVE_SYS_AUDIOIO_H
 343         info.record.buffer_size = bufsiz;
 344 # endif /* HAVE_SYS_AUDIOIO_H */
 345         rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info);
 346         if (rval < 0) {
 347                 msyslog(LOG_ERR, "audio: invalid control device parameters\n");
 348                 close(ctl_fd);
 349                 close(fd);
 350                 return(rval);
 351         }
 352         rval = fd;
 353 #endif /* not PCM_STYLE_SOUND */
 354         return (rval);
 355 }
 356
 357
 358 /*
 359  * audio_gain - adjust codec gains and port
 360  */
 361 int
 362 audio_gain(
 363         int gain,               /* volume level (gain) 0-255 */
 364         int mongain,            /* input to output mix (monitor gain) 0-255 */
 365         int port                /* selected I/O port: 1 mic/2 line in */
 366         )
 367 {
 368         int rval;
 369         static int o_mongain = -1;
 370         static int o_port = -1;
 371
 372 #ifdef PCM_STYLE_SOUND
 373         int l, r;
 374
 375         rval = 0;
 376
 377         r = l = 100 * gain / 255;       /* Normalize to 0-100 */
 378 # ifdef DEBUG
 379         if (debug > 1)
 380                 printf("audio_gain: gain %d/%d\n", gain, l);
 381 # endif
 382         /* figure out what channel(s) to use. just nuke right for now. */
 383         r = 0 ; /* setting to zero nicely mutes the channel */
 384
 385         l |= r << 8;
 386         if ( cf_agc )
 387           rval = ioctl(ctl_fd, agc, &l);
 388         else
 389           if (port == 2) {
 390             rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l);
 391           } else {
 392             rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l);
 393           }
 394         if (rval == -1) {
 395                 printf("audio_gain: agc write: %s\n", strerror(errno));
 396                 return (rval);
 397         }
 398
 399         if (o_mongain != mongain) {
 400                 r = l = 100 * mongain / 255;    /* Normalize to 0-100 */
 401 # ifdef DEBUG
 402                 if (debug > 1)
 403                         printf("audio_gain: mongain %d/%d\n", mongain, l);
 404 # endif
 405                 l |= r << 8;
 406                 if ( cf_monitor )
 407                   rval = ioctl(ctl_fd, monitor, &l );
 408                 else
 409                   rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l);
 410                 if (rval == -1) {
 411                         printf("audio_gain: mongain write: %s\n",
 412                                strerror(errno));
 413                         return (rval);
 414                 }
 415                 o_mongain = mongain;
 416         }
 417
 418         if (o_port != port) {
 419 # ifdef DEBUG
 420                 if (debug > 1)
 421                         printf("audio_gain: port %d\n", port);
 422 # endif
 423                 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC));
 424                 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l);
 425                 if (rval == -1) {
 426                         printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
 427                                strerror(errno));
 428                         return (rval);
 429                 }
 430 # ifdef DEBUG
 431                 if (debug > 1) {
 432                         if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1)
 433                                 printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
 434                                        strerror(errno));
 435                         else
 436                                 printf("audio_gain: recsrc is %d\n", l);
 437                 }
 438 # endif
 439                 o_port = port;
 440         }
 441 #else /* not PCM_STYLE_SOUND */
 442         ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info);
 443         info.record.encoding = AUDIO_ENCODING_ULAW;
 444         info.record.error = 0;
 445         info.record.gain = gain;
 446         if (o_mongain != mongain)
 447                 o_mongain = info.monitor_gain = mongain;
 448         if (o_port != port)
 449                 o_port = info.record.port = port;
 450         rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info);
 451         if (rval < 0) {
 452                 msyslog(LOG_ERR, "audio_gain: %m");
 453                 return (rval);
 454         }
 455         rval = info.record.error;
 456 #endif /* not PCM_STYLE_SOUND */
 457         return (rval);
 458 }
 459
 460
 461 /*
 462  * audio_show - display audio parameters
 463  *
 464  * This code doesn't really do anything, except satisfy curiousity and
 465  * verify the ioctl's work.
 466  */
 467 void
 468 audio_show(void)
 469 {
 470 #ifdef PCM_STYLE_SOUND
 471         int recsrc = 0;
 472
 473         printf("audio_show: ctl_fd %d\n", ctl_fd);
 474         if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
 475             printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
 476
 477 #else /* not PCM_STYLE_SOUND */
 478 # ifdef HAVE_SYS_AUDIOIO_H
 479         ioctl(ctl_fd, (int)AUDIO_GETDEV, &device);
 480         printf("audio: name %s, version %s, config %s\n",
 481             device.name, device.version, device.config);
 482 # endif /* HAVE_SYS_AUDIOIO_H */
 483         ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info);
 484         printf(
 485             "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n",
 486             info.record.sample_rate, info.record.channels,
 487             info.record.precision, info.record.encoding,
 488             info.record.gain, info.monitor_gain, info.record.port);
 489         printf(
 490             "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n",
 491             info.record.samples, info.record.eof,
 492             info.record.pause, info.record.error,
 493             info.record.waiting, info.record.balance);
 494 #endif /* not PCM_STYLE_SOUND */
 495 }
 496 #else
 497 int audio_bs;
 498 #endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */