522 lines
13 KiB
C
522 lines
13 KiB
C
/*
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* audio.c - audio interface for reference clock audio drivers
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if defined(HAVE_SYS_AUDIOIO_H) || defined(HAVE_SUN_AUDIOIO_H) || \
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defined(HAVE_SYS_SOUNDCARD_H) || defined(HAVE_MACHINE_SOUNDCARD_H)
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#include "audio.h"
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#include "ntp_stdlib.h"
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#include "ntp_syslog.h"
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#include "ntp_string.h"
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#ifdef HAVE_SYS_AUDIOIO_H
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# include <sys/audioio.h>
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#endif /* HAVE_SYS_AUDIOIO_H */
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#ifdef HAVE_SUN_AUDIOIO_H
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# include <sys/ioccom.h>
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# include <sun/audioio.h>
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#endif /* HAVE_SUN_AUDIOIO_H */
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif /* HAVE_SYS_IOCTL_H */
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#include <fcntl.h>
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#ifdef HAVE_MACHINE_SOUNDCARD_H
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# include <machine/soundcard.h>
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# define PCM_STYLE_SOUND
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#else
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# ifdef HAVE_SYS_SOUNDCARD_H
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# include <sys/soundcard.h>
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# define PCM_STYLE_SOUND
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# endif
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#endif
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#ifdef PCM_STYLE_SOUND
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# include <ctype.h>
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#endif
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/*
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* 4.4BSD-Lite switched to an unsigned long ioctl arg. Detect common
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* derivatives here, and apply that type. To make the following code
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* less verbose we make a proper typedef.
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* The joy of IOCTL programming...
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*/
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# if defined(__FreeBSD__) || defined(__APPLE__) || defined(__NetBSD__) || defined __OpenBSD__
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typedef unsigned long ioctl_arg_T;
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#else
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typedef int ioctl_arg_T;
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#endif
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/*
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* Global variables
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*/
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#ifdef HAVE_SYS_AUDIOIO_H
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static struct audio_device device; /* audio device ident */
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#endif /* HAVE_SYS_AUDIOIO_H */
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#ifdef PCM_STYLE_SOUND
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# define INIT_FILE "/etc/ntp.audio"
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static ioctl_arg_T agc = SOUND_MIXER_WRITE_RECLEV; /* or IGAIN or LINE */
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static ioctl_arg_T audiomonitor = SOUND_MIXER_WRITE_VOLUME; /* or OGAIN */
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static int devmask = 0;
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static int recmask = 0;
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static char cf_c_dev[100], cf_i_dev[100], cf_agc[100], cf_monitor[100];
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static const char *m_names[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
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#else /* not PCM_STYLE_SOUND */
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static struct audio_info info; /* audio device info */
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#endif /* not PCM_STYLE_SOUND */
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static int ctl_fd; /* audio control file descriptor */
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#ifdef PCM_STYLE_SOUND
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static void audio_config_read (int, const char **, const char **);
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static int mixer_name (const char *, int);
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int
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mixer_name(
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const char *m_name,
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int m_mask
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)
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{
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int i;
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for (i = 0; i < SOUND_MIXER_NRDEVICES; ++i)
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if (((1 << i) & m_mask)
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&& !strcmp(m_names[i], m_name))
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break;
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return (SOUND_MIXER_NRDEVICES == i)
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? -1
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: i
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;
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}
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/*
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* Check:
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*
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* /etc/ntp.audio# where # is the unit number
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* /etc/ntp.audio.# where # is the unit number
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* /etc/ntp.audio
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*
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* for contents of the form:
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*
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* idev /dev/input_device
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* cdev /dev/control_device
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* agc pcm_input_device {igain,line,line1,...}
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* monitor pcm_monitor_device {ogain,...}
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*
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* The device names for the "agc" and "monitor" keywords
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* can be found by running either the "mixer" program or the
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* util/audio-pcm program.
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*
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* Great hunks of this subroutine were swiped from refclock_oncore.c
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*/
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static void
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audio_config_read(
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int unit,
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const char **c_dev, /* Control device */
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const char **i_dev /* input device */
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)
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{
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FILE *fd;
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char device[20], line[100], ab[100];
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snprintf(device, sizeof(device), "%s%d", INIT_FILE, unit);
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if ((fd = fopen(device, "r")) == NULL) {
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printf("audio_config_read: <%s> NO\n", device);
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snprintf(device, sizeof(device), "%s.%d", INIT_FILE,
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unit);
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if ((fd = fopen(device, "r")) == NULL) {
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printf("audio_config_read: <%s> NO\n", device);
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snprintf(device, sizeof(device), "%s",
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INIT_FILE);
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if ((fd = fopen(device, "r")) == NULL) {
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printf("audio_config_read: <%s> NO\n",
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device);
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return;
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}
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}
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}
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printf("audio_config_read: reading <%s>\n", device);
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while (fgets(line, sizeof line, fd)) {
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char *cp, *cc, *ca;
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int i;
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/* Remove comments */
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if ((cp = strchr(line, '#')))
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*cp = '\0';
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/* Remove any trailing spaces */
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for (i = strlen(line);
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i > 0 && isascii((unsigned char)line[i - 1]) && isspace((unsigned char)line[i - 1]);
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)
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line[--i] = '\0';
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/* Remove leading space */
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for (cc = line; *cc && isascii((unsigned char)*cc) && isspace((unsigned char)*cc); cc++)
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continue;
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/* Stop if nothing left */
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if (!*cc)
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continue;
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/* Uppercase the command and find the arg */
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for (ca = cc; *ca; ca++) {
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if (isascii((unsigned char)*ca)) {
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if (islower((unsigned char)*ca)) {
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*ca = toupper((unsigned char)*ca);
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} else if (isspace((unsigned char)*ca) || (*ca == '='))
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break;
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}
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}
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/* Remove space (and possible =) leading the arg */
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for (; *ca && isascii((unsigned char)*ca) && (isspace((unsigned char)*ca) || (*ca == '=')); ca++)
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continue;
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if (!strncmp(cc, "IDEV", 4) &&
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1 == sscanf(ca, "%99s", ab)) {
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strlcpy(cf_i_dev, ab, sizeof(cf_i_dev));
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printf("idev <%s>\n", ab);
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} else if (!strncmp(cc, "CDEV", 4) &&
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1 == sscanf(ca, "%99s", ab)) {
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strlcpy(cf_c_dev, ab, sizeof(cf_c_dev));
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printf("cdev <%s>\n", ab);
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} else if (!strncmp(cc, "AGC", 3) &&
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1 == sscanf(ca, "%99s", ab)) {
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strlcpy(cf_agc, ab, sizeof(cf_agc));
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printf("agc <%s> %d\n", ab, i);
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} else if (!strncmp(cc, "MONITOR", 7) &&
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1 == sscanf(ca, "%99s", ab)) {
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strlcpy(cf_monitor, ab, sizeof(cf_monitor));
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printf("monitor <%s> %d\n", ab, mixer_name(ab, -1));
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}
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}
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fclose(fd);
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return;
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}
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#endif /* PCM_STYLE_SOUND */
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/*
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* audio_init - open and initialize audio device
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*
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* This code works with SunOS 4.x, Solaris 2.x, and PCM; however, it is
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* believed generic and applicable to other systems with a minor twid
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* or two. All it does is open the device, set the buffer size (Solaris
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* only), preset the gain and set the input port. It assumes that the
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* codec sample rate (8000 Hz), precision (8 bits), number of channels
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* (1) and encoding (ITU-T G.711 mu-law companded) have been set by
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* default.
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*/
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int
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audio_init(
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const char *dname, /* device name */
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int bufsiz, /* buffer size */
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int unit /* device unit (0-3) */
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)
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{
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#ifdef PCM_STYLE_SOUND
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# define ACTL_DEV "/dev/mixer%d"
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char actl_dev[30];
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# ifdef HAVE_STRUCT_SND_SIZE
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struct snd_size s_size;
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# endif
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# ifdef AIOGFMT
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snd_chan_param s_c_p;
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# endif
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#endif
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int fd;
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int rval;
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const char *actl =
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#ifdef PCM_STYLE_SOUND
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actl_dev
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#else
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"/dev/audioctl"
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#endif
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;
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#ifdef PCM_STYLE_SOUND
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snprintf(actl_dev, sizeof(actl_dev), ACTL_DEV, unit);
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audio_config_read(unit, &actl, &dname);
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/* If we have values for cf_c_dev or cf_i_dev, use them. */
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if (*cf_c_dev)
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actl = cf_c_dev;
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if (*cf_i_dev)
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dname = cf_i_dev;
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#endif
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/*
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* Open audio device
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*/
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fd = open(dname, O_RDWR | O_NONBLOCK, 0777);
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if (fd < 0) {
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msyslog(LOG_ERR, "audio_init: %s %m", dname);
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return (fd);
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}
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/*
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* Open audio control device.
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*/
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ctl_fd = open(actl, O_RDWR);
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if (ctl_fd < 0) {
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msyslog(LOG_ERR, "audio_init: invalid control device <%s>",
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actl);
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close(fd);
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return(ctl_fd);
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}
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/*
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* Set audio device parameters.
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*/
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#ifdef PCM_STYLE_SOUND
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printf("audio_init: <%s> bufsiz %d\n", dname, bufsiz);
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rval = fd;
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# ifdef HAVE_STRUCT_SND_SIZE
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if (ioctl(fd, AIOGSIZE, &s_size) == -1)
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printf("audio_init: AIOGSIZE: %s\n", strerror(errno));
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else
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printf("audio_init: orig: play_size %d, rec_size %d\n",
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s_size.play_size, s_size.rec_size);
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s_size.play_size = s_size.rec_size = bufsiz;
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printf("audio_init: want: play_size %d, rec_size %d\n",
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s_size.play_size, s_size.rec_size);
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if (ioctl(fd, AIOSSIZE, &s_size) == -1)
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printf("audio_init: AIOSSIZE: %s\n", strerror(errno));
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else
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printf("audio_init: set: play_size %d, rec_size %d\n",
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s_size.play_size, s_size.rec_size);
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# endif /* HAVE_STRUCT_SND_SIZE */
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# ifdef SNDCTL_DSP_SETFRAGMENT
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{
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int tmp = (16 << 16) + 6; /* 16 fragments, each 2^6 bytes */
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if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)
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printf("audio_init: SNDCTL_DSP_SETFRAGMENT: %s\n",
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strerror(errno));
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}
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# endif /* SNDCTL_DSP_SETFRAGMENT */
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# ifdef AIOGFMT
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if (ioctl(fd, AIOGFMT, &s_c_p) == -1)
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printf("audio_init: AIOGFMT: %s\n", strerror(errno));
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else
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printf("audio_init: play_rate %lu, rec_rate %lu, play_format %#lx, rec_format %#lx\n",
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s_c_p.play_rate, s_c_p.rec_rate, s_c_p.play_format, s_c_p.rec_format);
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# endif
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/* Grab the device and record masks */
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if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)
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printf("SOUND_MIXER_READ_DEVMASK: %s\n", strerror(errno));
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if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)
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printf("SOUND_MIXER_READ_RECMASK: %s\n", strerror(errno));
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/* validate and set any specified config file stuff */
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if (cf_agc[0] != '\0') {
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int i;
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/* recmask */
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i = mixer_name(cf_agc, recmask);
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if (i >= 0)
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agc = MIXER_WRITE(i);
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else
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printf("input %s not in recmask %#x\n",
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cf_agc, recmask);
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}
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if (cf_monitor[0] != '\0') {
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int i;
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/* devmask */
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i = mixer_name(cf_monitor, devmask);
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if (i >= 0)
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audiomonitor = MIXER_WRITE(i);
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else
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printf("monitor %s not in devmask %#x\n",
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cf_monitor, devmask);
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}
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#else /* not PCM_STYLE_SOUND */
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AUDIO_INITINFO(&info);
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info.play.gain = AUDIO_MAX_GAIN;
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info.play.port = AUDIO_SPEAKER;
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# ifdef HAVE_SYS_AUDIOIO_H
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info.record.buffer_size = bufsiz;
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# endif /* HAVE_SYS_AUDIOIO_H */
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rval = ioctl(ctl_fd, AUDIO_SETINFO, (char *)&info);
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if (rval < 0) {
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msyslog(LOG_ERR, "audio: invalid control device parameters");
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close(ctl_fd);
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close(fd);
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return(rval);
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}
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rval = fd;
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#endif /* not PCM_STYLE_SOUND */
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return (rval);
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}
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/*
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* audio_gain - adjust codec gains and port
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*/
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int
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audio_gain(
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int gain, /* volume level (gain) 0-255 */
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int mongain, /* input to output mix (monitor gain) 0-255 */
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int port /* selected I/O port: 1 mic/2 line in */
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)
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{
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int rval;
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static int o_mongain = -1;
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static int o_port = -1;
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#ifdef PCM_STYLE_SOUND
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int l, r;
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# ifdef GCC
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rval = 0; /* GCC thinks rval is used uninitialized */
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# endif
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r = l = 100 * gain / 255; /* Normalize to 0-100 */
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# ifdef DEBUG
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if (debug > 1)
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printf("audio_gain: gain %d/%d\n", gain, l);
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# endif
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#if 0 /* not a good idea to do this; connector wiring dependency */
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/* figure out what channel(s) to use. just nuke right for now. */
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r = 0 ; /* setting to zero nicely mutes the channel */
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#endif
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l |= r << 8;
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if (cf_agc[0] != '\0')
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rval = ioctl(ctl_fd, agc, &l);
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else
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rval = ioctl(ctl_fd
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, (2 == port)
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? SOUND_MIXER_WRITE_LINE
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: SOUND_MIXER_WRITE_MIC
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, &l);
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if (-1 == rval) {
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printf("audio_gain: agc write: %s\n", strerror(errno));
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return rval;
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}
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if (o_mongain != mongain) {
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r = l = 100 * mongain / 255; /* Normalize to 0-100 */
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# ifdef DEBUG
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if (debug > 1)
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printf("audio_gain: mongain %d/%d\n", mongain, l);
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# endif
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l |= r << 8;
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if (cf_monitor[0] != '\0')
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rval = ioctl(ctl_fd, audiomonitor, &l );
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else
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rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME,
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&l);
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if (-1 == rval) {
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printf("audio_gain: mongain write: %s\n",
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strerror(errno));
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return (rval);
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}
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o_mongain = mongain;
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}
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if (o_port != port) {
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# ifdef DEBUG
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if (debug > 1)
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printf("audio_gain: port %d\n", port);
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# endif
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l = (1 << ((port == 2) ? SOUND_MIXER_LINE : SOUND_MIXER_MIC));
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rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_RECSRC, &l);
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if (rval == -1) {
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printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
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strerror(errno));
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return (rval);
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}
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# ifdef DEBUG
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if (debug > 1) {
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if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1)
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printf("SOUND_MIXER_WRITE_RECSRC: %s\n",
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strerror(errno));
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else
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printf("audio_gain: recsrc is %d\n", l);
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}
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# endif
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o_port = port;
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}
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#else /* not PCM_STYLE_SOUND */
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ioctl(ctl_fd, AUDIO_GETINFO, (char *)&info);
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info.record.encoding = AUDIO_ENCODING_ULAW;
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info.record.error = 0;
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info.record.gain = gain;
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if (o_mongain != mongain)
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o_mongain = info.monitor_gain = mongain;
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if (o_port != port)
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o_port = info.record.port = port;
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rval = ioctl(ctl_fd, AUDIO_SETINFO, (char *)&info);
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if (rval < 0) {
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msyslog(LOG_ERR, "audio_gain: %m");
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return (rval);
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}
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rval = info.record.error;
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#endif /* not PCM_STYLE_SOUND */
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return (rval);
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}
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/*
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* audio_show - display audio parameters
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*
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* This code doesn't really do anything, except satisfy curiousity and
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* verify the ioctl's work.
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*/
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void
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audio_show(void)
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{
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#ifdef PCM_STYLE_SOUND
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int recsrc = 0;
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printf("audio_show: ctl_fd %d\n", ctl_fd);
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if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)
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printf("SOUND_MIXER_READ_RECSRC: %s\n", strerror(errno));
|
|
|
|
#else /* not PCM_STYLE_SOUND */
|
|
# ifdef HAVE_SYS_AUDIOIO_H
|
|
ioctl(ctl_fd, 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, 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 */
|