/*
* audio.c - audio interface for reference clock audio drivers
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if defined(HAVE_SYS_AUDIOIO_H) || defined(HAVE_SUN_AUDIOIO_H) || \
defined(HAVE_SYS_SOUNDCARD_H) || defined(HAVE_MACHINE_SOUNDCARD_H)
#include "audio.h"
#include "ntp_stdlib.h"
#include "ntp_syslog.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdio.h>
#include "ntp_string.h"
#ifdef HAVE_SYS_AUDIOIO_H
# include <sys/audioio.h>
#endif /* HAVE_SYS_AUDIOIO_H */
#ifdef HAVE_SUN_AUDIOIO_H
# include <sys/ioccom.h>
# include <sun/audioio.h>
#endif /* HAVE_SUN_AUDIOIO_H */
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif /* HAVE_SYS_IOCTL_H */
#include <fcntl.h>
#ifdef HAVE_MACHINE_SOUNDCARD_H
# include <machine/soundcard.h>
# define PCM_STYLE_SOUND
#else
# ifdef HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
# define PCM_STYLE_SOUND
# endif
#endif
#ifdef PCM_STYLE_SOUND
# include <ctype.h>
#endif
/*
* Global variables
*/
#ifdef HAVE_SYS_AUDIOIO_H
static struct audio_device device; /* audio device ident */
#endif /* HAVE_SYS_AUDIOIO_H */
#ifdef PCM_STYLE_SOUND
# define INIT_FILE "/etc/ntp.audio"
int agc = SOUND_MIXER_WRITE_RECLEV; /* or IGAIN or LINE */
int monitor = SOUND_MIXER_WRITE_VOLUME; /* or OGAIN */
int devmask = 0;
int recmask = 0;
char cf_c_dev[100], cf_i_dev[100], cf_agc[100], cf_monitor[100];
const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
#else /* not PCM_STYLE_SOUND */
static struct audio_info info; /* audio device info */
#endif /* not PCM_STYLE_SOUND */
static int ctl_fd; /* audio control file descriptor */
#ifdef PCM_STYLE_SOUND
static void audio_config_read (int, char **, char **);
static int mixer_name (const char *, int);
int
mixer_name(
const char *m_name,
int m_mask
)
{
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
if (((1 << i) & m_mask)
&& !strcmp(m_names[i], m_name))
break;
return (SOUND_MIXER_NRDEVICES == i)
? -1
: i
;
}
/*
* Check:
*
* /etc/ntp.audio# where # is the unit number
* /etc/ntp.audio.# where # is the unit number
* /etc/ntp.audio
*
* for contents of the form:
*
* idev /dev/input_device
* cdev /dev/control_device
* agc pcm_input_device {igain,line,line1,...}
* monitor pcm_monitor_device {ogain,...}
*
* The device names for the "agc" and "monitor" keywords
* can be found by running either the "mixer" program or the
* util/audio-pcm program.
*
* Great hunks of this subroutine were swiped from refclock_oncore.c
*/
static void
audio_config_read(
int unit,
char **c_dev, /* Control device */
char **i_dev /* input device */
)
{
FILE *fd;
char device[20], line[100], ab[100];
snprintf(device, sizeof(device), "%s%d", INIT_FILE, unit);
if ((fd = fopen(device, "r")) == NULL) {
printf("audio_config_read: <%s> NO\n", device);
snprintf(device, sizeof(device), "%s.%d", INIT_FILE,
unit);
if ((fd = fopen(device, "r")) == NULL) {
printf("audio_config_read: <%s> NO\n", device);
snprintf(device, sizeof(device), "%s",
INIT_FILE);
if ((fd = fopen(device, "r")) == NULL) {
printf("audio_config_read: <%s> NO\n",
device);
return;
}
}
}
printf("audio_config_read: reading <%s>\n", device);
while (fgets(line, sizeof line, fd)) {
char *cp, *cc, *ca;
int i;
/* Remove comments */
if ((cp = strchr(line, '#')))
*cp = '\0';
/* Remove any trailing spaces */
for (i = strlen(line);
i > 0 && isascii((int)line[i - 1]) && isspace((int)line[i - 1]);
)
line[--i] = '\0';
/* Remove leading space */
for (cc = line; *cc && isascii((int)*cc) && isspace((int)*cc); cc++)
continue;
/* Stop if nothing left */
if (!*cc)
continue;
/* Uppercase the command and find the arg */
for (ca = cc; *ca; ca++) {
if (isascii((int)*ca)) {
if (islower((int)*ca)) {
*ca = toupper(*ca);
} else if (isspace((int)*ca) || (*ca == '='))
break;
}
}
/* Remove space (and possible =) leading the arg */
for (; *ca && isascii((int)*ca) && (isspace((int)*ca) || (*ca == '=')); ca++)
continue;
if (!strncmp(cc, "IDEV", 4) &&
1 == sscanf(ca, "%99s", ab)) {
strncpy(cf_i_dev, ab, sizeof(cf_i_dev));
printf("idev <%s>\n", ab);
} else if (!strncmp(cc, "CDEV", 4) &&
1 == sscanf(ca, "%99s", ab)) {
strncpy(cf_c_dev, ab, sizeof(cf_c_dev));
printf("cdev <%s>\n", ab);
} else if (!strncmp(cc, "AGC", 3) &&
1 == sscanf(ca, "%99s", ab)) {
strncpy(cf_agc, ab, sizeof(cf_agc));
printf("agc <%s> %d\n", ab, i);
} else if (!strncmp(cc, "MONITOR", 7) &&
1 == sscanf(ca, "%99s", ab)) {
strncpy(cf_monitor, ab, sizeof(cf_monitor));
printf("monitor <%s> %d\n", ab, mixer_name(ab, -1));
}
}
fclose(fd);
return;
}
#endif /* PCM_STYLE_SOUND */
/*
* audio_init - open and initialize audio device
*
* This code works with SunOS 4.x, Solaris 2.x, and PCM; however, it is
* believed generic and applicable to other systems with a minor twid
* or two. All it does is open the device, set the buffer size (Solaris
* only), preset the gain and set the input port. It assumes that the
* codec sample rate (8000 Hz), precision (8 bits), number of channels
* (1) and encoding (ITU-T G.711 mu-law companded) have been set by
* default.
*/
int
audio_init(
char *dname, /* device name */
int bufsiz, /* buffer size */
int unit /* device unit (0-3) */
)
{
#ifdef PCM_STYLE_SOUND
# define ACTL_DEV "/dev/mixer%d"
char actl_dev[30];
# ifdef HAVE_STRUCT_SND_SIZE
struct snd_size s_size;
# endif
# ifdef AIOGFMT
snd_chan_param s_c_p;
# endif
#endif
int fd;
int rval;
char *actl =
#ifdef PCM_STYLE_SOUND
actl_dev
#else
"/dev/audioctl"
#endif
;
#ifdef PCM_STYLE_SOUND
snprintf(actl_dev, sizeof(actl_dev), ACTL_DEV, unit);
audio_config_read(unit, &actl, &dname);
/* If we have values for cf_c_dev or cf_i_dev, use them. */
if (*cf_c_dev)
actl = cf_c_dev;
if (*cf_i_dev)
dname = cf_i_dev;
#endif
/*
* Open audio device
*/
fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
if (fd < 0) {
msyslog(LOG_ERR, "audio_init: %s %m\n", dname);
return (fd);
}
/*
* Open audio control device.
*/
ctl_fd = open(actl, O_RDWR);
if (ctl_fd < 0) {
msyslog(LOG_ERR, "audio_init: invalid control device <%s>\n",
actl);
close(fd);
return(ctl_fd);
}
/*
* Set audio device parameters.
*/
#ifdef PCM_STYLE_SOUND
printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz);
rval = fd;
# ifdef HAVE_STRUCT_SND_SIZE
if (ioctl(fd, AIOGSIZE, &s_size) == -1)
printf("audio_init: AIOGSIZE: %s\n", strerror(errno));
else
printf("audio_init: orig: play_size %d, rec_size %d\n",
s_size.play_size, s_size.rec_size);
s_size.play_size = s_size.rec_size = bufsiz;
printf("audio_init: want: play_size %d, rec_size %d\n",
s_size.play_size, s_size.rec_size);
if (ioctl(fd, AIOSSIZE, &s_size) == -1)
printf("audio_init: AIOSSIZE: %s\n", strerror(errno));
else
printf("audio_init: set: play_size %d, rec_size %d\n",
s_size.play_size, s_size.rec_size);
# endif /* HAVE_STRUCT_SND_SIZE */
# ifdef SNDCTL_DSP_SETFRAGMENT
{
int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n",
strerror(errno));
}
# endif /* SNDCTL_DSP_SETFRAGMENT */
# ifdef AIOGFMT
if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
printf("audio_init: AIOGFMT: %s\n", strerror(errno));
else
printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
# endif
/* Grab the device and record masks */
if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
/* validate and set any specified config file stuff */
if (cf_agc[0] != '\0') {
int i;
i = mixer_name(cf_agc, devmask);
if (i >= 0)
agc = MIXER_WRITE(i);
else
printf("input %s not in recmask %#x\n",
cf_agc, recmask);
}
if (cf_monitor[0] != '\0') {
int i;
/* devmask */
i = mixer_name(cf_monitor, devmask);
if (i >= 0)
monitor = MIXER_WRITE(i);
else
printf("monitor %s not in devmask %#x\n",
cf_monitor, devmask);
}
#else /* not PCM_STYLE_SOUND */
AUDIO_INITINFO(&info);
info.play.gain = AUDIO_MAX_GAIN;
info.play.port = AUDIO_SPEAKER;
# ifdef HAVE_SYS_AUDIOIO_H
info.record.buffer_size = bufsiz;
# endif /* HAVE_SYS_AUDIOIO_H */
rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info);
if (rval < 0) {
msyslog(LOG_ERR, "audio: invalid control device parameters\n");
close(ctl_fd);
close(fd);
return(rval);
}
rval = fd;
#endif /* not PCM_STYLE_SOUND */
return (rval);
}
/*
* audio_gain - adjust codec gains and port
*/
int
audio_gain(
int gain, /* volume level (gain) 0-255 */
int mongain, /* input to output mix (monitor gain) 0-255 */
int port /* selected I/O port: 1 mic/2 line in */
)
{
int rval;
static int o_mongain = -1;
static int o_port = -1;
#ifdef PCM_STYLE_SOUND
int l, r;
rval = 0;
r = l = 100 * gain / 255; /* Normalize to 0-100 */
# ifdef DEBUG
if (debug > 1)
printf("audio_gain: gain %d/%d\n", gain, l);
# endif
#if 0 /* not a good idea to do this; connector wiring dependency */
/* figure out what channel(s) to use. just nuke right for now. */
r = 0 ; /* setting to zero nicely mutes the channel */
#endif
l |= r << 8;
if (cf_agc[0] != '\0')
rval = ioctl(ctl_fd, agc, &l);
else
if (2 == port)
rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l);
else
rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l);
if (-1 == rval) {
printf("audio_gain: agc write: %s\n", strerror(errno));
return rval;
}
if (o_mongain != mongain) {
r = l = 100 * mongain / 255; /* Normalize to 0-100 */
# ifdef DEBUG
if (debug > 1)
printf("audio_gain: mongain %d/%d\n", mongain, l);
# endif
l |= r << 8;
if (cf_monitor[0] != '\0')
rval = ioctl(ctl_fd, monitor, &l );
else
rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME,
&l);
if (-1 == rval) {
printf("audio_gain: mongain write: %s\n",
strerror(errno));
return (rval);
}
o_mongain = mongain;
}
if (o_port != port) {
# ifdef DEBUG
if (debug > 1)
printf("audio_gain: port %d\n", port);
# endif
l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC));
rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l);
if (rval == -1) {
printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
strerror(errno));
return (rval);
}
# ifdef DEBUG
if (debug > 1) {
if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1)
printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
strerror(errno));
else
printf("audio_gain: recsrc is %d\n", l);
}
# endif
o_port = port;
}
#else /* not PCM_STYLE_SOUND */
ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info);
info.record.encoding = AUDIO_ENCODING_ULAW;
info.record.error = 0;
info.record.gain = gain;
if (o_mongain != mongain)
o_mongain = info.monitor_gain = mongain;
if (o_port != port)
o_port = info.record.port = port;
rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, (char *)&info);
if (rval < 0) {
msyslog(LOG_ERR, "audio_gain: %m");
return (rval);
}
rval = info.record.error;
#endif /* not PCM_STYLE_SOUND */
return (rval);
}
/*
* audio_show - display audio parameters
*
* This code doesn't really do anything, except satisfy curiousity and
* verify the ioctl's work.
*/
void
audio_show(void)
{
#ifdef PCM_STYLE_SOUND
int recsrc = 0;
printf("audio_show: ctl_fd %d\n", ctl_fd);
if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
#else /* not PCM_STYLE_SOUND */
# ifdef HAVE_SYS_AUDIOIO_H
ioctl(ctl_fd, (int)AUDIO_GETDEV, &device);
printf("audio: name %s, version %s, config %s\n",
device.name, device.version, device.config);
# endif /* HAVE_SYS_AUDIOIO_H */
ioctl(ctl_fd, (int)AUDIO_GETINFO, (char *)&info);
printf(
"audio: rate %d, chan %d, prec %d, code %d, gain %d, mon %d, port %d\n",
info.record.sample_rate, info.record.channels,
info.record.precision, info.record.encoding,
info.record.gain, info.monitor_gain, info.record.port);
printf(
"audio: samples %d, eof %d, pause %d, error %d, waiting %d, balance %d\n",
info.record.samples, info.record.eof,
info.record.pause, info.record.error,
info.record.waiting, info.record.balance);
#endif /* not PCM_STYLE_SOUND */
}
#else
int audio_bs;
#endif /* HAVE_{SYS_AUDIOIO,SUN_AUDIOIO,MACHINE_SOUNDCARD,SYS_SOUNDCARD}_H */
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