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