1 /* $NetBSD: audio.c,v 1.3 2010/12/04 23:08:34 christos 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 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((unsigned char)line[i - 1]) && isspace((unsigned char)line[i - 1]); 151 ) 152 line[--i] = '\0'; 153 154 /* Remove leading space */ 155 for (cc = line; *cc && isascii((unsigned char)*cc) && isspace((unsigned char)*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((unsigned char)*ca)) { 165 if (islower((unsigned char)*ca)) { 166 *ca = toupper((unsigned char)*ca); 167 } else if (isspace((unsigned char)*ca) || (*ca == '=')) 168 break; 169 } 170 } 171 172 /* Remove space (and possible =) leading the arg */ 173 for (; *ca && isascii((unsigned char)*ca) && (isspace((unsigned char)*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 const 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 const 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 250 */ 251 fd = open(dname, O_RDWR | O_NONBLOCK, 0777); 252 if (fd < 0) { 253 msyslog(LOG_ERR, "audio_init: %s %m\n", dname); 254 return (fd); 255 } 256 257 /* 258 * Open audio control device. 259 */ 260 ctl_fd = open(actl, O_RDWR); 261 if (ctl_fd < 0) { 262 msyslog(LOG_ERR, "audio_init: invalid control device <%s>\n", 263 actl); 264 close(fd); 265 return(ctl_fd); 266 } 267 268 /* 269 * Set audio device parameters. 270 */ 271 #ifdef PCM_STYLE_SOUND 272 printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz); 273 rval = fd; 274 275 # ifdef HAVE_STRUCT_SND_SIZE 276 if (ioctl(fd, AIOGSIZE, &s_size) == -1) 277 printf("audio_init: AIOGSIZE: %s\n", strerror(errno)); 278 else 279 printf("audio_init: orig: play_size %d, rec_size %d\n", 280 s_size.play_size, s_size.rec_size); 281 282 s_size.play_size = s_size.rec_size = bufsiz; 283 printf("audio_init: want: play_size %d, rec_size %d\n", 284 s_size.play_size, s_size.rec_size); 285 286 if (ioctl(fd, AIOSSIZE, &s_size) == -1) 287 printf("audio_init: AIOSSIZE: %s\n", strerror(errno)); 288 else 289 printf("audio_init: set: play_size %d, rec_size %d\n", 290 s_size.play_size, s_size.rec_size); 291 # endif /* HAVE_STRUCT_SND_SIZE */ 292 293 # ifdef SNDCTL_DSP_SETFRAGMENT 294 { 295 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */ 296 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1) 297 printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n", 298 strerror(errno)); 299 } 300 # endif /* SNDCTL_DSP_SETFRAGMENT */ 301 302 # ifdef AIOGFMT 303 if (ioctl(fd, AIOGFMT, &s_c_p) == -1) 304 printf("audio_init: AIOGFMT: %s\n", strerror(errno)); 305 else 306 printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n", 307 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format); 308 # endif 309 310 /* Grab the device and record masks */ 311 312 if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) 313 printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno)); 314 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) 315 printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno)); 316 317 /* validate and set any specified config file stuff */ 318 if (*cf_agc) { 319 int i; 320 321 i = mixer_name(cf_agc, devmask); 322 if (i >= 0) 323 agc = MIXER_WRITE(i); 324 else 325 printf("input %s not in recmask %#x\n", 326 cf_agc, recmask); 327 } 328 329 if (*cf_monitor) { 330 int i; 331 332 /* devmask */ 333 i = mixer_name(cf_monitor, devmask); 334 if (i >= 0) 335 monitor = MIXER_WRITE(i); 336 else 337 printf("monitor %s not in devmask %#x\n", 338 cf_monitor, devmask); 339 } 340 341 #else /* not PCM_STYLE_SOUND */ 342 AUDIO_INITINFO(&info); 343 info.play.gain = AUDIO_MAX_GAIN; 344 info.play.port = AUDIO_SPEAKER; 345 # ifdef HAVE_SYS_AUDIOIO_H 346 info.record.buffer_size = bufsiz; 347 # endif /* HAVE_SYS_AUDIOIO_H */ 348 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 349 if (rval < 0) { 350 msyslog(LOG_ERR, "audio: invalid control device parameters\n"); 351 close(ctl_fd); 352 close(fd); 353 return(rval); 354 } 355 rval = fd; 356 #endif /* not PCM_STYLE_SOUND */ 357 return (rval); 358 } 359 360 361 /* 362 * audio_gain - adjust codec gains and port 363 */ 364 int 365 audio_gain( 366 int gain, /* volume level (gain) 0-255 */ 367 int mongain, /* input to output mix (monitor gain) 0-255 */ 368 int port /* selected I/O port: 1 mic/2 line in */ 369 ) 370 { 371 int rval; 372 static int o_mongain = -1; 373 static int o_port = -1; 374 375 #ifdef PCM_STYLE_SOUND 376 int l, r; 377 378 rval = 0; 379 380 r = l = 100 * gain / 255; /* Normalize to 0-100 */ 381 # ifdef DEBUG 382 if (debug > 1) 383 printf("audio_gain: gain %d/%d\n", gain, l); 384 # endif 385 #if 0 /* not a good idea to do this; connector wiring dependency */ 386 /* figure out what channel(s) to use. just nuke right for now. */ 387 r = 0 ; /* setting to zero nicely mutes the channel */ 388 #endif 389 l |= r << 8; 390 if ( cf_agc ) 391 rval = ioctl(ctl_fd, agc, &l); 392 else 393 if (port == 2) { 394 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); 395 } else { 396 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); 397 } 398 if (rval == -1) { 399 printf("audio_gain: agc write: %s\n", strerror(errno)); 400 return (rval); 401 } 402 403 if (o_mongain != mongain) { 404 r = l = 100 * mongain / 255; /* Normalize to 0-100 */ 405 # ifdef DEBUG 406 if (debug > 1) 407 printf("audio_gain: mongain %d/%d\n", mongain, l); 408 # endif 409 l |= r << 8; 410 if ( cf_monitor ) 411 rval = ioctl(ctl_fd, monitor, &l ); 412 else 413 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l); 414 if (rval == -1) { 415 printf("audio_gain: mongain write: %s\n", 416 strerror(errno)); 417 return (rval); 418 } 419 o_mongain = mongain; 420 } 421 422 if (o_port != port) { 423 # ifdef DEBUG 424 if (debug > 1) 425 printf("audio_gain: port %d\n", port); 426 # endif 427 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC)); 428 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l); 429 if (rval == -1) { 430 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 431 strerror(errno)); 432 return (rval); 433 } 434 # ifdef DEBUG 435 if (debug > 1) { 436 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1) 437 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 438 strerror(errno)); 439 else 440 printf("audio_gain: recsrc is %d\n", l); 441 } 442 # endif 443 o_port = port; 444 } 445 #else /* not PCM_STYLE_SOUND */ 446 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 447 info.record.encoding = AUDIO_ENCODING_ULAW; 448 info.record.error = 0; 449 info.record.gain = gain; 450 if (o_mongain != mongain) 451 o_mongain = info.monitor_gain = mongain; 452 if (o_port != port) 453 o_port = info.record.port = port; 454 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 455 if (rval < 0) { 456 msyslog(LOG_ERR, "audio_gain: %m"); 457 return (rval); 458 } 459 rval = info.record.error; 460 #endif /* not PCM_STYLE_SOUND */ 461 return (rval); 462 } 463 464 465 /* 466 * audio_show - display audio parameters 467 * 468 * This code doesn't really do anything, except satisfy curiousity and 469 * verify the ioctl's work. 470 */ 471 void 472 audio_show(void) 473 { 474 #ifdef PCM_STYLE_SOUND 475 int recsrc = 0; 476 477 printf("audio_show: ctl_fd %d\n", ctl_fd); 478 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) 479 printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno)); 480 481 #else /* not PCM_STYLE_SOUND */ 482 # ifdef HAVE_SYS_AUDIOIO_H 483 ioctl(ctl_fd, (int)AUDIO_GETDEV, &device); 484 printf("audio: name %s, version %s, config %s\n", 485 device.name, device.version, device.config); 486 # endif /* HAVE_SYS_AUDIOIO_H */ 487 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 488 printf( 489 "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n", 490 info.record.sample_rate, info.record.channels, 491 info.record.precision, info.record.encoding, 492 info.record.gain, info.monitor_gain, info.record.port); 493 printf( 494 "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n", 495 info.record.samples, info.record.eof, 496 info.record.pause, info.record.error, 497 info.record.waiting, info.record.balance); 498 #endif /* not PCM_STYLE_SOUND */ 499 } 500 #else 501 int audio_bs; 502 #endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */ 503