diff options
Diffstat (limited to 'libntp/audio.c')
-rw-r--r-- | libntp/audio.c | 481 |
1 files changed, 481 insertions, 0 deletions
diff --git a/libntp/audio.c b/libntp/audio.c new file mode 100644 index 0000000..65a6063 --- /dev/null +++ b/libntp/audio.c @@ -0,0 +1,481 @@ +/* + * 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 P((int, char **, char **)); +static int mixer_name P((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]; + + sprintf(device, "%s%d", INIT_FILE, unit); + if ((fd = fopen(device, "r")) == NULL) { + printf("audio_config_read: <%s> NO\n", device); + sprintf(device, "%s.%d", INIT_FILE, unit); + if ((fd = fopen(device, "r")) == NULL) { + printf("audio_config_read: <%s> NO\n", device); + sprintf(device, "%s.%d", INIT_FILE, unit); + 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", (size_t) 4)) { + sscanf(ca, "%s", ab); + strcpy(cf_i_dev, ab); + printf("idev <%s>\n", ab); + } else if (!strncmp(cc, "CDEV", (size_t) 4)) { + sscanf(ca, "%s", ab); + strcpy(cf_c_dev, ab); + printf("cdev <%s>\n", ab); + } else if (!strncmp(cc, "AGC", (size_t) 3)) { + sscanf(ca, "%s", ab); + strcpy(cf_agc, ab); + printf("agc <%s> %d\n", ab, i); + } else if (!strncmp(cc, "MONITOR", (size_t) 7)) { + sscanf(ca, "%s", ab); + strcpy(cf_monitor, ab); + 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 + (void)sprintf(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) + dname = cf_c_dev; + if (*cf_i_dev) + actl = cf_i_dev; +#endif + + /* + * Open audio device. Do not complain if not there. + */ + fd = open(dname, O_RDWR | O_NONBLOCK, 0777); + if (fd < 0) + 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 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) { + int i; + + i = mixer_name(cf_agc, recmask); + if (i >= 0) + agc = MIXER_WRITE(i); + else + printf("input %s not in recmask %#x\n", + cf_agc, recmask); + } + + if (*cf_monitor) { + 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 + /* figure out what channel(s) to use. just nuke right for now. */ + r = 0 ; /* setting to zero nicely mutes the channel */ + + l |= r << 8; + if (port == 2) { + rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_LINE, &l); + } else { + rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_MIC, &l); + } + if (rval == -1) { + 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; + rval = ioctl(ctl_fd, SOUND_MIXER_WRITE_VOLUME, &l); + if (rval == -1) { + 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 */ |