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 53static 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" 57int agc = SOUND_MIXER_WRITE_RECLEV; /* or IGAIN or LINE */ 58int monitor = SOUND_MIXER_WRITE_VOLUME; /* or OGAIN */ 59int devmask = 0; 60int recmask = 0; 61char cf_c_dev[100], cf_i_dev[100], cf_agc[100], cf_monitor[100]; 62 63const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES; 64#else /* not PCM_STYLE_SOUND */ 65static struct audio_info info; /* audio device info */ 66#endif /* not PCM_STYLE_SOUND */ 67static int ctl_fd; /* audio control file descriptor */ 68 69#ifdef PCM_STYLE_SOUND 70static void audio_config_read P((int, char **, char **)); 71static int mixer_name P((const char *, int)); 72 73 74int 75mixer_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 */ 114static void 115audio_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 */ 208int 209audio_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 actl = cf_c_dev; 242 if (*cf_i_dev) 243 dname = 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 SNDCTL_DSP_SETFRAGMENT 289 { 290 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */ 291 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1) 292 printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n", 293 strerror(errno)); 294 } 295# endif /* SNDCTL_DSP_SETFRAGMENT */ 296 297# ifdef AIOGFMT 298 if (ioctl(fd, AIOGFMT, &s_c_p) == -1) 299 printf("audio_init: AIOGFMT: %s\n", strerror(errno)); 300 else 301 printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n", 302 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format); 303# endif 304 305 /* Grab the device and record masks */ 306 307 if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) 308 printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno)); 309 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) 310 printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno)); 311 312 /* validate and set any specified config file stuff */ 313 if (*cf_agc) { 314 int i; 315 316 i = mixer_name(cf_agc, devmask); 317 if (i >= 0) 318 agc = MIXER_WRITE(i); 319 else 320 printf("input %s not in recmask %#x\n", 321 cf_agc, recmask); 322 } 323 324 if (*cf_monitor) { 325 int i; 326 327 /* devmask */ 328 i = mixer_name(cf_monitor, devmask); 329 if (i >= 0) 330 monitor = MIXER_WRITE(i); 331 else 332 printf("monitor %s not in devmask %#x\n", 333 cf_monitor, devmask); 334 } 335 336#else /* not PCM_STYLE_SOUND */ 337 AUDIO_INITINFO(&info); 338 info.play.gain = AUDIO_MAX_GAIN; 339 info.play.port = AUDIO_SPEAKER; 340# ifdef HAVE_SYS_AUDIOIO_H 341 info.record.buffer_size = bufsiz; 342# endif /* HAVE_SYS_AUDIOIO_H */ 343 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 344 if (rval < 0) { 345 msyslog(LOG_ERR, "audio: invalid control device parameters\n"); 346 close(ctl_fd); 347 close(fd); 348 return(rval); 349 } 350 rval = fd; 351#endif /* not PCM_STYLE_SOUND */ 352 return (rval); 353} 354 355 356/* 357 * audio_gain - adjust codec gains and port 358 */ 359int 360audio_gain( 361 int gain, /* volume level (gain) 0-255 */ 362 int mongain, /* input to output mix (monitor gain) 0-255 */ 363 int port /* selected I/O port: 1 mic/2 line in */ 364 ) 365{ 366 int rval; 367 static int o_mongain = -1; 368 static int o_port = -1; 369 370#ifdef PCM_STYLE_SOUND 371 int l, r; 372 373 rval = 0; 374 375 r = l = 100 * gain / 255; /* Normalize to 0-100 */ 376# ifdef DEBUG 377 if (debug > 1) 378 printf("audio_gain: gain %d/%d\n", gain, l); 379# endif 380 /* figure out what channel(s) to use. just nuke right for now. */ 381 r = 0 ; /* setting to zero nicely mutes the channel */ 382 383 l |= r << 8; 384 if ( cf_agc ) 385 rval = ioctl(ctl_fd, agc, &l); 386 else 387 if (port == 2) { 388 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); 389 } else { 390 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); 391 } 392 if (rval == -1) { 393 printf("audio_gain: agc write: %s\n", strerror(errno)); 394 return (rval); 395 } 396 397 if (o_mongain != mongain) { 398 r = l = 100 * mongain / 255; /* Normalize to 0-100 */ 399# ifdef DEBUG 400 if (debug > 1) 401 printf("audio_gain: mongain %d/%d\n", mongain, l); 402# endif 403 l |= r << 8; 404 if ( cf_monitor ) 405 rval = ioctl(ctl_fd, monitor, &l ); 406 else 407 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l); 408 if (rval == -1) { 409 printf("audio_gain: mongain write: %s\n", 410 strerror(errno)); 411 return (rval); 412 } 413 o_mongain = mongain; 414 } 415 416 if (o_port != port) { 417# ifdef DEBUG 418 if (debug > 1) 419 printf("audio_gain: port %d\n", port); 420# endif 421 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC)); 422 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l); 423 if (rval == -1) { 424 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 425 strerror(errno)); 426 return (rval); 427 } 428# ifdef DEBUG 429 if (debug > 1) { 430 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1) 431 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 432 strerror(errno)); 433 else 434 printf("audio_gain: recsrc is %d\n", l); 435 } 436# endif 437 o_port = port; 438 } 439#else /* not PCM_STYLE_SOUND */ 440 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 441 info.record.encoding = AUDIO_ENCODING_ULAW; 442 info.record.error = 0; 443 info.record.gain = gain; 444 if (o_mongain != mongain) 445 o_mongain = info.monitor_gain = mongain; 446 if (o_port != port) 447 o_port = info.record.port = port; 448 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 449 if (rval < 0) { 450 msyslog(LOG_ERR, "audio_gain: %m"); 451 return (rval); 452 } 453 rval = info.record.error; 454#endif /* not PCM_STYLE_SOUND */ 455 return (rval); 456} 457 458 459/* 460 * audio_show - display audio parameters 461 * 462 * This code doesn't really do anything, except satisfy curiousity and 463 * verify the ioctl's work. 464 */ 465void 466audio_show(void) 467{ 468#ifdef PCM_STYLE_SOUND 469 int recsrc = 0; 470 471 printf("audio_show: ctl_fd %d\n", ctl_fd); 472 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) 473 printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno)); 474 475#else /* not PCM_STYLE_SOUND */ 476# ifdef HAVE_SYS_AUDIOIO_H 477 ioctl(ctl_fd, (int)AUDIO_GETDEV, &device); 478 printf("audio: name %s, version %s, config %s\n", 479 device.name, device.version, device.config); 480# endif /* HAVE_SYS_AUDIOIO_H */ 481 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 482 printf( 483 "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n", 484 info.record.sample_rate, info.record.channels, 485 info.record.precision, info.record.encoding, 486 info.record.gain, info.monitor_gain, info.record.port); 487 printf( 488 "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n", 489 info.record.samples, info.record.eof, 490 info.record.pause, info.record.error, 491 info.record.waiting, info.record.balance); 492#endif /* not PCM_STYLE_SOUND */ 493} 494#else 495int audio_bs; 496#endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */ 497