2 * audio.c - audio interface for reference clock audio drivers
8 #if defined(HAVE_SYS_AUDIOIO_H) || defined(HAVE_SUN_AUDIOIO_H) || \
9 defined(HAVE_SYS_SOUNDCARD_H) || defined(HAVE_MACHINE_SOUNDCARD_H)
12 #include "ntp_stdlib.h"
13 #include "ntp_syslog.h"
18 #include "ntp_string.h"
20 #ifdef HAVE_SYS_AUDIOIO_H
21 # include <sys/audioio.h>
22 #endif /* HAVE_SYS_AUDIOIO_H */
24 #ifdef HAVE_SUN_AUDIOIO_H
25 # include <sys/ioccom.h>
26 # include <sun/audioio.h>
27 #endif /* HAVE_SUN_AUDIOIO_H */
29 #ifdef HAVE_SYS_IOCTL_H
30 # include <sys/ioctl.h>
31 #endif /* HAVE_SYS_IOCTL_H */
35 #ifdef HAVE_MACHINE_SOUNDCARD_H
36 # include <machine/soundcard.h>
37 # define PCM_STYLE_SOUND
39 # ifdef HAVE_SYS_SOUNDCARD_H
40 # include <sys/soundcard.h>
41 # define PCM_STYLE_SOUND
45 #ifdef PCM_STYLE_SOUND
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 */
61 char cf_c_dev[100], cf_i_dev[100], cf_agc[100], cf_monitor[100];
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 */
69 #ifdef PCM_STYLE_SOUND
70 static void audio_config_read P((int, char **, char **));
71 static int mixer_name P((const char *, int));
82 for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
83 if (((1 << i) & m_mask)
84 && !strcmp(m_names[i], m_name))
87 return (SOUND_MIXER_NRDEVICES == i)
97 * /etc/ntp.audio# where # is the unit number
98 * /etc/ntp.audio.# where # is the unit number
101 * for contents of the form:
103 * idev /dev/input_device
104 * cdev /dev/control_device
105 * agc pcm_input_device {igain,line,line1,...}
106 * monitor pcm_monitor_device {ogain,...}
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.
112 * Great hunks of this subroutine were swiped from refclock_oncore.c
117 char **c_dev, /* Control device */
118 char **i_dev /* input device */
122 char device[20], line[100], ab[100];
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);
137 printf("audio_config_read: reading <%s>\n", device);
138 while (fgets(line, sizeof line, fd)) {
142 /* Remove comments */
143 if ((cp = strchr(line, '#')))
146 /* Remove any trailing spaces */
147 for (i = strlen(line);
148 i > 0 && isascii((int)line[i - 1]) && isspace((int)line[i - 1]);
152 /* Remove leading space */
153 for (cc = line; *cc && isascii((int)*cc) && isspace((int)*cc); cc++)
156 /* Stop if nothing left */
160 /* Uppercase the command and find the arg */
161 for (ca = cc; *ca; ca++) {
162 if (isascii((int)*ca)) {
163 if (islower((int)*ca)) {
165 } else if (isspace((int)*ca) || (*ca == '='))
170 /* Remove space (and possible =) leading the arg */
171 for (; *ca && isascii((int)*ca) && (isspace((int)*ca) || (*ca == '=')); ca++)
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);
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));
195 #endif /* PCM_STYLE_SOUND */
198 * audio_init - open and initialize audio device
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
210 char *dname, /* device name */
211 int bufsiz, /* buffer size */
212 int unit /* device unit (0-3) */
215 #ifdef PCM_STYLE_SOUND
216 # define ACTL_DEV "/dev/mixer%d"
218 # ifdef HAVE_STRUCT_SND_SIZE
219 struct snd_size s_size;
222 snd_chan_param s_c_p;
228 #ifdef PCM_STYLE_SOUND
235 #ifdef PCM_STYLE_SOUND
236 (void)sprintf(actl_dev, ACTL_DEV, unit);
238 audio_config_read(unit, &actl, &dname);
239 /* If we have values for cf_c_dev or cf_i_dev, use them. */
247 * Open audio device. Do not complain if not there.
249 fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
254 * Open audio control device.
256 ctl_fd = open(actl, O_RDWR);
258 msyslog(LOG_ERR, "audio_init: invalid control device <%s>\n", actl);
264 * Set audio device parameters.
266 #ifdef PCM_STYLE_SOUND
267 printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz);
270 # ifdef HAVE_STRUCT_SND_SIZE
271 if (ioctl(fd, AIOGSIZE, &s_size) == -1)
272 printf("audio_init: AIOGSIZE: %s\n", strerror(errno));
274 printf("audio_init: orig: play_size %d, rec_size %d\n",
275 s_size.play_size, s_size.rec_size);
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);
281 if (ioctl(fd, AIOSSIZE, &s_size) == -1)
282 printf("audio_init: AIOSSIZE: %s\n", strerror(errno));
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 */
288 # ifdef SNDCTL_DSP_SETFRAGMENT
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",
295 # endif /* SNDCTL_DSP_SETFRAGMENT */
298 if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
299 printf("audio_init: AIOGFMT: %s\n", strerror(errno));
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);
305 /* Grab the device and record masks */
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));
312 /* validate and set any specified config file stuff */
316 i = mixer_name(cf_agc, devmask);
318 agc = MIXER_WRITE(i);
320 printf("input %s not in recmask %#x\n",
328 i = mixer_name(cf_monitor, devmask);
330 monitor = MIXER_WRITE(i);
332 printf("monitor %s not in devmask %#x\n",
333 cf_monitor, devmask);
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);
345 msyslog(LOG_ERR, "audio: invalid control device parameters\n");
351 #endif /* not PCM_STYLE_SOUND */
357 * audio_gain - adjust codec gains and port
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 */
367 static int o_mongain = -1;
368 static int o_port = -1;
370 #ifdef PCM_STYLE_SOUND
375 r = l = 100 * gain / 255; /* Normalize to 0-100 */
378 printf("audio_gain: gain %d/%d\n", gain, l);
380 /* figure out what channel(s) to use. just nuke right for now. */
381 r = 0 ; /* setting to zero nicely mutes the channel */
385 rval = ioctl(ctl_fd, agc, &l);
388 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l);
390 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l);
393 printf("audio_gain: agc write: %s\n", strerror(errno));
397 if (o_mongain != mongain) {
398 r = l = 100 * mongain / 255; /* Normalize to 0-100 */
401 printf("audio_gain: mongain %d/%d\n", mongain, l);
405 rval = ioctl(ctl_fd, monitor, &l );
407 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l);
409 printf("audio_gain: mongain write: %s\n",
416 if (o_port != port) {
419 printf("audio_gain: port %d\n", port);
421 l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC));
422 rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l);
424 printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
430 if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1)
431 printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
434 printf("audio_gain: recsrc is %d\n", l);
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;
447 o_port = info.record.port = port;
448 rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info);
450 msyslog(LOG_ERR, "audio_gain: %m");
453 rval = info.record.error;
454 #endif /* not PCM_STYLE_SOUND */
460 * audio_show - display audio parameters
462 * This code doesn't really do anything, except satisfy curiousity and
463 * verify the ioctl's work.
468 #ifdef PCM_STYLE_SOUND
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));
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);
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);
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 */
496 #endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */