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 (int, char **, char **); 71static int mixer_name (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 248 */ 249 fd = open(dname, O_RDWR | O_NONBLOCK, 0777); 250 if (fd < 0) { 251 msyslog(LOG_ERR, "audio_init: %s %m\n", dname); 252 return (fd); 253 } 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", 261 actl); 262 close(fd); 263 return(ctl_fd); 264 } 265 266 /* 267 * Set audio device parameters. 268 */ 269#ifdef PCM_STYLE_SOUND 270 printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz); 271 rval = fd; 272 273# ifdef HAVE_STRUCT_SND_SIZE 274 if (ioctl(fd, AIOGSIZE, &s_size) == -1) 275 printf("audio_init: AIOGSIZE: %s\n", strerror(errno)); 276 else 277 printf("audio_init: orig: play_size %d, rec_size %d\n", 278 s_size.play_size, s_size.rec_size); 279 280 s_size.play_size = s_size.rec_size = bufsiz; 281 printf("audio_init: want: play_size %d, rec_size %d\n", 282 s_size.play_size, s_size.rec_size); 283 284 if (ioctl(fd, AIOSSIZE, &s_size) == -1) 285 printf("audio_init: AIOSSIZE: %s\n", strerror(errno)); 286 else 287 printf("audio_init: set: play_size %d, rec_size %d\n", 288 s_size.play_size, s_size.rec_size); 289# endif /* HAVE_STRUCT_SND_SIZE */ 290 291# ifdef SNDCTL_DSP_SETFRAGMENT 292 { 293 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */ 294 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1) 295 printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n", 296 strerror(errno)); 297 } 298# endif /* SNDCTL_DSP_SETFRAGMENT */ 299 300# ifdef AIOGFMT 301 if (ioctl(fd, AIOGFMT, &s_c_p) == -1) 302 printf("audio_init: AIOGFMT: %s\n", strerror(errno)); 303 else 304 printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n", 305 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format); 306# endif 307 308 /* Grab the device and record masks */ 309 310 if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) 311 printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno)); 312 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) 313 printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno)); 314 315 /* validate and set any specified config file stuff */ 316 if (*cf_agc) { 317 int i; 318 319 i = mixer_name(cf_agc, devmask); 320 if (i >= 0) 321 agc = MIXER_WRITE(i); 322 else 323 printf("input %s not in recmask %#x\n", 324 cf_agc, recmask); 325 } 326 327 if (*cf_monitor) { 328 int i; 329 330 /* devmask */ 331 i = mixer_name(cf_monitor, devmask); 332 if (i >= 0) 333 monitor = MIXER_WRITE(i); 334 else 335 printf("monitor %s not in devmask %#x\n", 336 cf_monitor, devmask); 337 } 338 339#else /* not PCM_STYLE_SOUND */ 340 AUDIO_INITINFO(&info); 341 info.play.gain = AUDIO_MAX_GAIN; 342 info.play.port = AUDIO_SPEAKER; 343# ifdef HAVE_SYS_AUDIOIO_H 344 info.record.buffer_size = bufsiz; 345# endif /* HAVE_SYS_AUDIOIO_H */ 346 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 347 if (rval < 0) { 348 msyslog(LOG_ERR, "audio: invalid control device parameters\n"); 349 close(ctl_fd); 350 close(fd); 351 return(rval); 352 } 353 rval = fd; 354#endif /* not PCM_STYLE_SOUND */ 355 return (rval); 356} 357 358 359/* 360 * audio_gain - adjust codec gains and port 361 */ 362int 363audio_gain( 364 int gain, /* volume level (gain) 0-255 */ 365 int mongain, /* input to output mix (monitor gain) 0-255 */ 366 int port /* selected I/O port: 1 mic/2 line in */ 367 ) 368{ 369 int rval; 370 static int o_mongain = -1; 371 static int o_port = -1; 372 373#ifdef PCM_STYLE_SOUND 374 int l, r; 375 376 rval = 0; 377 378 r = l = 100 * gain / 255; /* Normalize to 0-100 */ 379# ifdef DEBUG 380 if (debug > 1) 381 printf("audio_gain: gain %d/%d\n", gain, l); 382# endif 383#if 0 /* not a good idea to do this; connector wiring dependency */ 384 /* figure out what channel(s) to use. just nuke right for now. */ 385 r = 0 ; /* setting to zero nicely mutes the channel */ 386#endif 387 l |= r << 8; 388 if ( cf_agc ) 389 rval = ioctl(ctl_fd, agc, &l); 390 else 391 if (port == 2) { 392 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); 393 } else { 394 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); 395 } 396 if (rval == -1) { 397 printf("audio_gain: agc write: %s\n", strerror(errno)); 398 return (rval); 399 } 400 401 if (o_mongain != mongain) { 402 r = l = 100 * mongain / 255; /* Normalize to 0-100 */ 403# ifdef DEBUG 404 if (debug > 1) 405 printf("audio_gain: mongain %d/%d\n", mongain, l); 406# endif 407 l |= r << 8; 408 if ( cf_monitor ) 409 rval = ioctl(ctl_fd, monitor, &l ); 410 else 411 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l); 412 if (rval == -1) { 413 printf("audio_gain: mongain write: %s\n", 414 strerror(errno)); 415 return (rval); 416 } 417 o_mongain = mongain; 418 } 419 420 if (o_port != port) { 421# ifdef DEBUG 422 if (debug > 1) 423 printf("audio_gain: port %d\n", port); 424# endif 425 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC)); 426 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l); 427 if (rval == -1) { 428 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 429 strerror(errno)); 430 return (rval); 431 } 432# ifdef DEBUG 433 if (debug > 1) { 434 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1) 435 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 436 strerror(errno)); 437 else 438 printf("audio_gain: recsrc is %d\n", l); 439 } 440# endif 441 o_port = port; 442 } 443#else /* not PCM_STYLE_SOUND */ 444 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 445 info.record.encoding = AUDIO_ENCODING_ULAW; 446 info.record.error = 0; 447 info.record.gain = gain; 448 if (o_mongain != mongain) 449 o_mongain = info.monitor_gain = mongain; 450 if (o_port != port) 451 o_port = info.record.port = port; 452 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 453 if (rval < 0) { 454 msyslog(LOG_ERR, "audio_gain: %m"); 455 return (rval); 456 } 457 rval = info.record.error; 458#endif /* not PCM_STYLE_SOUND */ 459 return (rval); 460} 461 462 463/* 464 * audio_show - display audio parameters 465 * 466 * This code doesn't really do anything, except satisfy curiousity and 467 * verify the ioctl's work. 468 */ 469void 470audio_show(void) 471{ 472#ifdef PCM_STYLE_SOUND 473 int recsrc = 0; 474 475 printf("audio_show: ctl_fd %d\n", ctl_fd); 476 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) 477 printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno)); 478 479#else /* not PCM_STYLE_SOUND */ 480# ifdef HAVE_SYS_AUDIOIO_H 481 ioctl(ctl_fd, (int)AUDIO_GETDEV, &device); 482 printf("audio: name %s, version %s, config %s\n", 483 device.name, device.version, device.config); 484# endif /* HAVE_SYS_AUDIOIO_H */ 485 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 486 printf( 487 "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n", 488 info.record.sample_rate, info.record.channels, 489 info.record.precision, info.record.encoding, 490 info.record.gain, info.monitor_gain, info.record.port); 491 printf( 492 "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n", 493 info.record.samples, info.record.eof, 494 info.record.pause, info.record.error, 495 info.record.waiting, info.record.balance); 496#endif /* not PCM_STYLE_SOUND */ 497} 498#else 499int audio_bs; 500#endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */ 501