audio.c revision 1.4
1 /* $NetBSD: audio.c,v 1.4 2012/02/01 07:46:22 kardel 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 (int, char **, char **); 73 static int mixer_name (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 snprintf(device, sizeof(device), "%s%d", INIT_FILE, unit); 127 if ((fd = fopen(device, "r")) == NULL) { 128 printf("audio_config_read: <%s> NO\n", device); 129 snprintf(device, sizeof(device), "%s.%d", INIT_FILE, 130 unit); 131 if ((fd = fopen(device, "r")) == NULL) { 132 printf("audio_config_read: <%s> NO\n", device); 133 snprintf(device, sizeof(device), "%s", 134 INIT_FILE); 135 if ((fd = fopen(device, "r")) == NULL) { 136 printf("audio_config_read: <%s> NO\n", 137 device); 138 return; 139 } 140 } 141 } 142 printf("audio_config_read: reading <%s>\n", device); 143 while (fgets(line, sizeof line, fd)) { 144 char *cp, *cc, *ca; 145 int i; 146 147 /* Remove comments */ 148 if ((cp = strchr(line, '#'))) 149 *cp = '\0'; 150 151 /* Remove any trailing spaces */ 152 for (i = strlen(line); 153 i > 0 && isascii((unsigned char)line[i - 1]) && isspace((unsigned char)line[i - 1]); 154 ) 155 line[--i] = '\0'; 156 157 /* Remove leading space */ 158 for (cc = line; *cc && isascii((unsigned char)*cc) && isspace((unsigned char)*cc); cc++) 159 continue; 160 161 /* Stop if nothing left */ 162 if (!*cc) 163 continue; 164 165 /* Uppercase the command and find the arg */ 166 for (ca = cc; *ca; ca++) { 167 if (isascii((unsigned char)*ca)) { 168 if (islower((unsigned char)*ca)) { 169 *ca = toupper((unsigned char)*ca); 170 } else if (isspace((unsigned char)*ca) || (*ca == '=')) 171 break; 172 } 173 } 174 175 /* Remove space (and possible =) leading the arg */ 176 for (; *ca && isascii((unsigned char)*ca) && (isspace((unsigned char)*ca) || (*ca == '=')); ca++) 177 continue; 178 179 if (!strncmp(cc, "IDEV", 4) && 180 1 == sscanf(ca, "%99s", ab)) { 181 strncpy(cf_i_dev, ab, sizeof(cf_i_dev)); 182 printf("idev <%s>\n", ab); 183 } else if (!strncmp(cc, "CDEV", 4) && 184 1 == sscanf(ca, "%99s", ab)) { 185 strncpy(cf_c_dev, ab, sizeof(cf_c_dev)); 186 printf("cdev <%s>\n", ab); 187 } else if (!strncmp(cc, "AGC", 3) && 188 1 == sscanf(ca, "%99s", ab)) { 189 strncpy(cf_agc, ab, sizeof(cf_agc)); 190 printf("agc <%s> %d\n", ab, i); 191 } else if (!strncmp(cc, "MONITOR", 7) && 192 1 == sscanf(ca, "%99s", ab)) { 193 strncpy(cf_monitor, ab, sizeof(cf_monitor)); 194 printf("monitor <%s> %d\n", ab, mixer_name(ab, -1)); 195 } 196 } 197 fclose(fd); 198 return; 199 } 200 #endif /* PCM_STYLE_SOUND */ 201 202 /* 203 * audio_init - open and initialize audio device 204 * 205 * This code works with SunOS 4.x, Solaris 2.x, and PCM; however, it is 206 * believed generic and applicable to other systems with a minor twid 207 * or two. All it does is open the device, set the buffer size (Solaris 208 * only), preset the gain and set the input port. It assumes that the 209 * codec sample rate (8000 Hz), precision (8 bits), number of channels 210 * (1) and encoding (ITU-T G.711 mu-law companded) have been set by 211 * default. 212 */ 213 int 214 audio_init( 215 const char *dname, /* device name */ 216 int bufsiz, /* buffer size */ 217 int unit /* device unit (0-3) */ 218 ) 219 { 220 #ifdef PCM_STYLE_SOUND 221 # define ACTL_DEV "/dev/mixer%d" 222 char actl_dev[30]; 223 # ifdef HAVE_STRUCT_SND_SIZE 224 struct snd_size s_size; 225 # endif 226 # ifdef AIOGFMT 227 snd_chan_param s_c_p; 228 # endif 229 #endif 230 int fd; 231 int rval; 232 const char *actl = 233 #ifdef PCM_STYLE_SOUND 234 actl_dev 235 #else 236 "/dev/audioctl" 237 #endif 238 ; 239 240 #ifdef PCM_STYLE_SOUND 241 snprintf(actl_dev, sizeof(actl_dev), ACTL_DEV, unit); 242 243 audio_config_read(unit, &actl, &dname); 244 /* If we have values for cf_c_dev or cf_i_dev, use them. */ 245 if (*cf_c_dev) 246 actl = cf_c_dev; 247 if (*cf_i_dev) 248 dname = cf_i_dev; 249 #endif 250 251 /* 252 * Open audio device 253 */ 254 fd = open(dname, O_RDWR | O_NONBLOCK, 0777); 255 if (fd < 0) { 256 msyslog(LOG_ERR, "audio_init: %s %m\n", dname); 257 return (fd); 258 } 259 260 /* 261 * Open audio control device. 262 */ 263 ctl_fd = open(actl, O_RDWR); 264 if (ctl_fd < 0) { 265 msyslog(LOG_ERR, "audio_init: invalid control device <%s>\n", 266 actl); 267 close(fd); 268 return(ctl_fd); 269 } 270 271 /* 272 * Set audio device parameters. 273 */ 274 #ifdef PCM_STYLE_SOUND 275 printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz); 276 rval = fd; 277 278 # ifdef HAVE_STRUCT_SND_SIZE 279 if (ioctl(fd, AIOGSIZE, &s_size) == -1) 280 printf("audio_init: AIOGSIZE: %s\n", strerror(errno)); 281 else 282 printf("audio_init: orig: play_size %d, rec_size %d\n", 283 s_size.play_size, s_size.rec_size); 284 285 s_size.play_size = s_size.rec_size = bufsiz; 286 printf("audio_init: want: play_size %d, rec_size %d\n", 287 s_size.play_size, s_size.rec_size); 288 289 if (ioctl(fd, AIOSSIZE, &s_size) == -1) 290 printf("audio_init: AIOSSIZE: %s\n", strerror(errno)); 291 else 292 printf("audio_init: set: play_size %d, rec_size %d\n", 293 s_size.play_size, s_size.rec_size); 294 # endif /* HAVE_STRUCT_SND_SIZE */ 295 296 # ifdef SNDCTL_DSP_SETFRAGMENT 297 { 298 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */ 299 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1) 300 printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n", 301 strerror(errno)); 302 } 303 # endif /* SNDCTL_DSP_SETFRAGMENT */ 304 305 # ifdef AIOGFMT 306 if (ioctl(fd, AIOGFMT, &s_c_p) == -1) 307 printf("audio_init: AIOGFMT: %s\n", strerror(errno)); 308 else 309 printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n", 310 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format); 311 # endif 312 313 /* Grab the device and record masks */ 314 315 if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) 316 printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno)); 317 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) 318 printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno)); 319 320 /* validate and set any specified config file stuff */ 321 if (cf_agc[0] != '\0') { 322 int i; 323 324 i = mixer_name(cf_agc, devmask); 325 if (i >= 0) 326 agc = MIXER_WRITE(i); 327 else 328 printf("input %s not in recmask %#x\n", 329 cf_agc, recmask); 330 } 331 332 if (cf_monitor[0] != '\0') { 333 int i; 334 335 /* devmask */ 336 i = mixer_name(cf_monitor, devmask); 337 if (i >= 0) 338 monitor = MIXER_WRITE(i); 339 else 340 printf("monitor %s not in devmask %#x\n", 341 cf_monitor, devmask); 342 } 343 344 #else /* not PCM_STYLE_SOUND */ 345 AUDIO_INITINFO(&info); 346 info.play.gain = AUDIO_MAX_GAIN; 347 info.play.port = AUDIO_SPEAKER; 348 # ifdef HAVE_SYS_AUDIOIO_H 349 info.record.buffer_size = bufsiz; 350 # endif /* HAVE_SYS_AUDIOIO_H */ 351 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 352 if (rval < 0) { 353 msyslog(LOG_ERR, "audio: invalid control device parameters\n"); 354 close(ctl_fd); 355 close(fd); 356 return(rval); 357 } 358 rval = fd; 359 #endif /* not PCM_STYLE_SOUND */ 360 return (rval); 361 } 362 363 364 /* 365 * audio_gain - adjust codec gains and port 366 */ 367 int 368 audio_gain( 369 int gain, /* volume level (gain) 0-255 */ 370 int mongain, /* input to output mix (monitor gain) 0-255 */ 371 int port /* selected I/O port: 1 mic/2 line in */ 372 ) 373 { 374 int rval; 375 static int o_mongain = -1; 376 static int o_port = -1; 377 378 #ifdef PCM_STYLE_SOUND 379 int l, r; 380 381 rval = 0; 382 383 r = l = 100 * gain / 255; /* Normalize to 0-100 */ 384 # ifdef DEBUG 385 if (debug > 1) 386 printf("audio_gain: gain %d/%d\n", gain, l); 387 # endif 388 #if 0 /* not a good idea to do this; connector wiring dependency */ 389 /* figure out what channel(s) to use. just nuke right for now. */ 390 r = 0 ; /* setting to zero nicely mutes the channel */ 391 #endif 392 l |= r << 8; 393 if (cf_agc[0] != '\0') 394 rval = ioctl(ctl_fd, agc, &l); 395 else 396 if (2 == port) 397 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); 398 else 399 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); 400 if (-1 == rval) { 401 printf("audio_gain: agc write: %s\n", strerror(errno)); 402 return rval; 403 } 404 405 if (o_mongain != mongain) { 406 r = l = 100 * mongain / 255; /* Normalize to 0-100 */ 407 # ifdef DEBUG 408 if (debug > 1) 409 printf("audio_gain: mongain %d/%d\n", mongain, l); 410 # endif 411 l |= r << 8; 412 if (cf_monitor[0] != '\0') 413 rval = ioctl(ctl_fd, monitor, &l ); 414 else 415 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, 416 &l); 417 if (-1 == rval) { 418 printf("audio_gain: mongain write: %s\n", 419 strerror(errno)); 420 return (rval); 421 } 422 o_mongain = mongain; 423 } 424 425 if (o_port != port) { 426 # ifdef DEBUG 427 if (debug > 1) 428 printf("audio_gain: port %d\n", port); 429 # endif 430 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC)); 431 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l); 432 if (rval == -1) { 433 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 434 strerror(errno)); 435 return (rval); 436 } 437 # ifdef DEBUG 438 if (debug > 1) { 439 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1) 440 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 441 strerror(errno)); 442 else 443 printf("audio_gain: recsrc is %d\n", l); 444 } 445 # endif 446 o_port = port; 447 } 448 #else /* not PCM_STYLE_SOUND */ 449 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 450 info.record.encoding = AUDIO_ENCODING_ULAW; 451 info.record.error = 0; 452 info.record.gain = gain; 453 if (o_mongain != mongain) 454 o_mongain = info.monitor_gain = mongain; 455 if (o_port != port) 456 o_port = info.record.port = port; 457 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 458 if (rval < 0) { 459 msyslog(LOG_ERR, "audio_gain: %m"); 460 return (rval); 461 } 462 rval = info.record.error; 463 #endif /* not PCM_STYLE_SOUND */ 464 return (rval); 465 } 466 467 468 /* 469 * audio_show - display audio parameters 470 * 471 * This code doesn't really do anything, except satisfy curiousity and 472 * verify the ioctl's work. 473 */ 474 void 475 audio_show(void) 476 { 477 #ifdef PCM_STYLE_SOUND 478 int recsrc = 0; 479 480 printf("audio_show: ctl_fd %d\n", ctl_fd); 481 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) 482 printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno)); 483 484 #else /* not PCM_STYLE_SOUND */ 485 # ifdef HAVE_SYS_AUDIOIO_H 486 ioctl(ctl_fd, (int)AUDIO_GETDEV, &device); 487 printf("audio: name %s, version %s, config %s\n", 488 device.name, device.version, device.config); 489 # endif /* HAVE_SYS_AUDIOIO_H */ 490 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 491 printf( 492 "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n", 493 info.record.sample_rate, info.record.channels, 494 info.record.precision, info.record.encoding, 495 info.record.gain, info.monitor_gain, info.record.port); 496 printf( 497 "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n", 498 info.record.samples, info.record.eof, 499 info.record.pause, info.record.error, 500 info.record.waiting, info.record.balance); 501 #endif /* not PCM_STYLE_SOUND */ 502 } 503 #else 504 int audio_bs; 505 #endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */ 506
Indexes created Thu Apr 30 00:23:01 UTC 2026