audio.c revision 285612
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, const char **, const 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 const char **c_dev, /* Control device */ 118 const char **i_dev /* input device */ 119 ) 120{ 121 FILE *fd; 122 char device[20], line[100], ab[100]; 123 124 snprintf(device, sizeof(device), "%s%d", INIT_FILE, unit); 125 if ((fd = fopen(device, "r")) == NULL) { 126 printf("audio_config_read: <%s> NO\n", device); 127 snprintf(device, sizeof(device), "%s.%d", INIT_FILE, 128 unit); 129 if ((fd = fopen(device, "r")) == NULL) { 130 printf("audio_config_read: <%s> NO\n", device); 131 snprintf(device, sizeof(device), "%s", 132 INIT_FILE); 133 if ((fd = fopen(device, "r")) == NULL) { 134 printf("audio_config_read: <%s> NO\n", 135 device); 136 return; 137 } 138 } 139 } 140 printf("audio_config_read: reading <%s>\n", device); 141 while (fgets(line, sizeof line, fd)) { 142 char *cp, *cc, *ca; 143 int i; 144 145 /* Remove comments */ 146 if ((cp = strchr(line, '#'))) 147 *cp = '\0'; 148 149 /* Remove any trailing spaces */ 150 for (i = strlen(line); 151 i > 0 && isascii((unsigned char)line[i - 1]) && isspace((unsigned char)line[i - 1]); 152 ) 153 line[--i] = '\0'; 154 155 /* Remove leading space */ 156 for (cc = line; *cc && isascii((unsigned char)*cc) && isspace((unsigned char)*cc); cc++) 157 continue; 158 159 /* Stop if nothing left */ 160 if (!*cc) 161 continue; 162 163 /* Uppercase the command and find the arg */ 164 for (ca = cc; *ca; ca++) { 165 if (isascii((unsigned char)*ca)) { 166 if (islower((unsigned char)*ca)) { 167 *ca = toupper((unsigned char)*ca); 168 } else if (isspace((unsigned char)*ca) || (*ca == '=')) 169 break; 170 } 171 } 172 173 /* Remove space (and possible =) leading the arg */ 174 for (; *ca && isascii((unsigned char)*ca) && (isspace((unsigned char)*ca) || (*ca == '=')); ca++) 175 continue; 176 177 if (!strncmp(cc, "IDEV", 4) && 178 1 == sscanf(ca, "%99s", ab)) { 179 strlcpy(cf_i_dev, ab, sizeof(cf_i_dev)); 180 printf("idev <%s>\n", ab); 181 } else if (!strncmp(cc, "CDEV", 4) && 182 1 == sscanf(ca, "%99s", ab)) { 183 strlcpy(cf_c_dev, ab, sizeof(cf_c_dev)); 184 printf("cdev <%s>\n", ab); 185 } else if (!strncmp(cc, "AGC", 3) && 186 1 == sscanf(ca, "%99s", ab)) { 187 strlcpy(cf_agc, ab, sizeof(cf_agc)); 188 printf("agc <%s> %d\n", ab, i); 189 } else if (!strncmp(cc, "MONITOR", 7) && 190 1 == sscanf(ca, "%99s", ab)) { 191 strlcpy(cf_monitor, ab, sizeof(cf_monitor)); 192 printf("monitor <%s> %d\n", ab, mixer_name(ab, -1)); 193 } 194 } 195 fclose(fd); 196 return; 197} 198#endif /* PCM_STYLE_SOUND */ 199 200/* 201 * audio_init - open and initialize audio device 202 * 203 * This code works with SunOS 4.x, Solaris 2.x, and PCM; however, it is 204 * believed generic and applicable to other systems with a minor twid 205 * or two. All it does is open the device, set the buffer size (Solaris 206 * only), preset the gain and set the input port. It assumes that the 207 * codec sample rate (8000 Hz), precision (8 bits), number of channels 208 * (1) and encoding (ITU-T G.711 mu-law companded) have been set by 209 * default. 210 */ 211int 212audio_init( 213 const char *dname, /* device name */ 214 int bufsiz, /* buffer size */ 215 int unit /* device unit (0-3) */ 216 ) 217{ 218#ifdef PCM_STYLE_SOUND 219# define ACTL_DEV "/dev/mixer%d" 220 char actl_dev[30]; 221# ifdef HAVE_STRUCT_SND_SIZE 222 struct snd_size s_size; 223# endif 224# ifdef AIOGFMT 225 snd_chan_param s_c_p; 226# endif 227#endif 228 int fd; 229 int rval; 230 const char *actl = 231#ifdef PCM_STYLE_SOUND 232 actl_dev 233#else 234 "/dev/audioctl" 235#endif 236 ; 237 238#ifdef PCM_STYLE_SOUND 239 snprintf(actl_dev, sizeof(actl_dev), ACTL_DEV, unit); 240 241 audio_config_read(unit, &actl, &dname); 242 /* If we have values for cf_c_dev or cf_i_dev, use them. */ 243 if (*cf_c_dev) 244 actl = cf_c_dev; 245 if (*cf_i_dev) 246 dname = cf_i_dev; 247#endif 248 249 /* 250 * Open audio device 251 */ 252 fd = open(dname, O_RDWR | O_NONBLOCK, 0777); 253 if (fd < 0) { 254 msyslog(LOG_ERR, "audio_init: %s %m", dname); 255 return (fd); 256 } 257 258 /* 259 * Open audio control device. 260 */ 261 ctl_fd = open(actl, O_RDWR); 262 if (ctl_fd < 0) { 263 msyslog(LOG_ERR, "audio_init: invalid control device <%s>", 264 actl); 265 close(fd); 266 return(ctl_fd); 267 } 268 269 /* 270 * Set audio device parameters. 271 */ 272#ifdef PCM_STYLE_SOUND 273 printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz); 274 rval = fd; 275 276# ifdef HAVE_STRUCT_SND_SIZE 277 if (ioctl(fd, AIOGSIZE, &s_size) == -1) 278 printf("audio_init: AIOGSIZE: %s\n", strerror(errno)); 279 else 280 printf("audio_init: orig: play_size %d, rec_size %d\n", 281 s_size.play_size, s_size.rec_size); 282 283 s_size.play_size = s_size.rec_size = bufsiz; 284 printf("audio_init: want: play_size %d, rec_size %d\n", 285 s_size.play_size, s_size.rec_size); 286 287 if (ioctl(fd, AIOSSIZE, &s_size) == -1) 288 printf("audio_init: AIOSSIZE: %s\n", strerror(errno)); 289 else 290 printf("audio_init: set: play_size %d, rec_size %d\n", 291 s_size.play_size, s_size.rec_size); 292# endif /* HAVE_STRUCT_SND_SIZE */ 293 294# ifdef SNDCTL_DSP_SETFRAGMENT 295 { 296 int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */ 297 if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1) 298 printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n", 299 strerror(errno)); 300 } 301# endif /* SNDCTL_DSP_SETFRAGMENT */ 302 303# ifdef AIOGFMT 304 if (ioctl(fd, AIOGFMT, &s_c_p) == -1) 305 printf("audio_init: AIOGFMT: %s\n", strerror(errno)); 306 else 307 printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n", 308 s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format); 309# endif 310 311 /* Grab the device and record masks */ 312 313 if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) 314 printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno)); 315 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) 316 printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno)); 317 318 /* validate and set any specified config file stuff */ 319 if (cf_agc[0] != '\0') { 320 int i; 321 322 /* recmask */ 323 i = mixer_name(cf_agc, recmask); 324 if (i >= 0) 325 agc = MIXER_WRITE(i); 326 else 327 printf("input %s not in recmask %#x\n", 328 cf_agc, recmask); 329 } 330 331 if (cf_monitor[0] != '\0') { 332 int i; 333 334 /* devmask */ 335 i = mixer_name(cf_monitor, devmask); 336 if (i >= 0) 337 monitor = MIXER_WRITE(i); 338 else 339 printf("monitor %s not in devmask %#x\n", 340 cf_monitor, devmask); 341 } 342 343#else /* not PCM_STYLE_SOUND */ 344 AUDIO_INITINFO(&info); 345 info.play.gain = AUDIO_MAX_GAIN; 346 info.play.port = AUDIO_SPEAKER; 347# ifdef HAVE_SYS_AUDIOIO_H 348 info.record.buffer_size = bufsiz; 349# endif /* HAVE_SYS_AUDIOIO_H */ 350 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 351 if (rval < 0) { 352 msyslog(LOG_ERR, "audio: invalid control device parameters"); 353 close(ctl_fd); 354 close(fd); 355 return(rval); 356 } 357 rval = fd; 358#endif /* not PCM_STYLE_SOUND */ 359 return (rval); 360} 361 362 363/* 364 * audio_gain - adjust codec gains and port 365 */ 366int 367audio_gain( 368 int gain, /* volume level (gain) 0-255 */ 369 int mongain, /* input to output mix (monitor gain) 0-255 */ 370 int port /* selected I/O port: 1 mic/2 line in */ 371 ) 372{ 373 int rval; 374 static int o_mongain = -1; 375 static int o_port = -1; 376 377#ifdef PCM_STYLE_SOUND 378 int l, r; 379 380 rval = 0; 381 382 r = l = 100 * gain / 255; /* Normalize to 0-100 */ 383# ifdef DEBUG 384 if (debug > 1) 385 printf("audio_gain: gain %d/%d\n", gain, l); 386# endif 387#if 0 /* not a good idea to do this; connector wiring dependency */ 388 /* figure out what channel(s) to use. just nuke right for now. */ 389 r = 0 ; /* setting to zero nicely mutes the channel */ 390#endif 391 l |= r << 8; 392 if (cf_agc[0] != '\0') 393 rval = ioctl(ctl_fd, agc, &l); 394 else 395 if (2 == port) 396 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); 397 else 398 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); 399 if (-1 == rval) { 400 printf("audio_gain: agc write: %s\n", strerror(errno)); 401 return rval; 402 } 403 404 if (o_mongain != mongain) { 405 r = l = 100 * mongain / 255; /* Normalize to 0-100 */ 406# ifdef DEBUG 407 if (debug > 1) 408 printf("audio_gain: mongain %d/%d\n", mongain, l); 409# endif 410 l |= r << 8; 411 if (cf_monitor[0] != '\0') 412 rval = ioctl(ctl_fd, monitor, &l ); 413 else 414 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, 415 &l); 416 if (-1 == rval) { 417 printf("audio_gain: mongain write: %s\n", 418 strerror(errno)); 419 return (rval); 420 } 421 o_mongain = mongain; 422 } 423 424 if (o_port != port) { 425# ifdef DEBUG 426 if (debug > 1) 427 printf("audio_gain: port %d\n", port); 428# endif 429 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC)); 430 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l); 431 if (rval == -1) { 432 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 433 strerror(errno)); 434 return (rval); 435 } 436# ifdef DEBUG 437 if (debug > 1) { 438 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1) 439 printf("SOUND_MIXER_WRITE_RECSRC: %s\n", 440 strerror(errno)); 441 else 442 printf("audio_gain: recsrc is %d\n", l); 443 } 444# endif 445 o_port = port; 446 } 447#else /* not PCM_STYLE_SOUND */ 448 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 449 info.record.encoding = AUDIO_ENCODING_ULAW; 450 info.record.error = 0; 451 info.record.gain = gain; 452 if (o_mongain != mongain) 453 o_mongain = info.monitor_gain = mongain; 454 if (o_port != port) 455 o_port = info.record.port = port; 456 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info); 457 if (rval < 0) { 458 msyslog(LOG_ERR, "audio_gain: %m"); 459 return (rval); 460 } 461 rval = info.record.error; 462#endif /* not PCM_STYLE_SOUND */ 463 return (rval); 464} 465 466 467/* 468 * audio_show - display audio parameters 469 * 470 * This code doesn't really do anything, except satisfy curiousity and 471 * verify the ioctl's work. 472 */ 473void 474audio_show(void) 475{ 476#ifdef PCM_STYLE_SOUND 477 int recsrc = 0; 478 479 printf("audio_show: ctl_fd %d\n", ctl_fd); 480 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1) 481 printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno)); 482 483#else /* not PCM_STYLE_SOUND */ 484# ifdef HAVE_SYS_AUDIOIO_H 485 ioctl(ctl_fd, (int)AUDIO_GETDEV, &device); 486 printf("audio: name %s, version %s, config %s\n", 487 device.name, device.version, device.config); 488# endif /* HAVE_SYS_AUDIOIO_H */ 489 ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info); 490 printf( 491 "audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n", 492 info.record.sample_rate, info.record.channels, 493 info.record.precision, info.record.encoding, 494 info.record.gain, info.monitor_gain, info.record.port); 495 printf( 496 "audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n", 497 info.record.samples, info.record.eof, 498 info.record.pause, info.record.error, 499 info.record.waiting, info.record.balance); 500#endif /* not PCM_STYLE_SOUND */ 501} 502#else 503int audio_bs; 504#endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */ 505