1 files changed, 154 insertions, 0 deletions
diff --git a/contrib/ntp/libntp/audio.c b/contrib/ntp/libntp/audio.c
new file mode 100644
index 000000000000..3228bba62a46
--- /dev/null
+++ b/contrib/ntp/libntp/audio.c
@@ -0,0 +1,154 @@
+/*
+ * audio.c - audio interface for reference clock audio drivers
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "audio.h"
+#include <unistd.h>
+#include <stdio.h>
+
+#ifdef HAVE_SYS_AUDIOIO_H
+#include <sys/audioio.h>
+#endif /* HAVE_SYS_AUDIOIO_H */
+#ifdef HAVE_SUN_AUDIOIO_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>
+
+/*
+ * Global variables
+ */
+#ifdef HAVE_SYS_AUDIOIO_H
+static struct audio_device device; /* audio device ident */
+static struct audio_info info;	/* audio device info */
+static int ctl_fd;		/* audio control file descriptor */
+#endif /* HAVE_SYS_AUDIOIO_H */
+
+
+/*
+ * audio_init - open and initialize audio device
+ *
+ * This code works with SunOS 4.x and Solaris 2.x; 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(void)
+{
+	int fd;
+#ifdef HAVE_SYS_AUDIOIO_H
+	int rval;
+#endif /* HAVE_SYS_AUDIOIO_H */
+
+	/*
+	 * Open audio device
+	 */
+	fd = open("/dev/audio", O_RDWR | O_NONBLOCK, 0777);
+	if (fd < 0) {
+		perror("audio:");
+		return (fd);
+	}
+
+#ifdef HAVE_SYS_AUDIOIO_H
+	/*
+	 * Open audio control device
+	 */
+	ctl_fd = open("/dev/audioctl", O_RDWR);
+	if (ctl_fd < 0) {
+		perror("audioctl:");
+		close(fd);
+		return(ctl_fd);
+	}
+
+	/*
+	 * Set audio device parameters.
+	 */
+	rval = audio_gain((AUDIO_MAX_GAIN - AUDIO_MIN_GAIN) / 2,
+	    AUDIO_MICROPHONE);
+	if (rval < 0) {
+		close(ctl_fd);
+		close(fd);
+		return(rval);
+	}
+#endif /* HAVE_SYS_AUDIOIO_H */
+	return (fd);
+}
+
+
+/*
+ * audio_gain - adjust codec gain and port
+ */
+int
+audio_gain(
+	int gain,		/* gain 0-255 */
+	int port		/* port */
+	)
+{
+#ifdef HAVE_SYS_AUDIOIO_H
+	int rval;
+#endif /* HAVE_SYS_AUDIOIO_H */
+
+#ifdef HAVE_SYS_AUDIOIO_H
+	AUDIO_INITINFO(&info);
+	info.record.buffer_size = AUDIO_BUFSIZ;
+	info.record.gain = gain;
+	info.record.port = port;
+	info.record.error = 0;
+	rval = ioctl(ctl_fd, (int)AUDIO_SETINFO, &info);
+	if (rval < 0) {
+		perror("audio:");
+		return (rval);
+	}
+	return (info.record.error);
+#else
+	return (0);
+#endif /* HAVE_SYS_AUDIOIO_H */
+}
+
+
+/*
+ * 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 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);
+	ioctl(ctl_fd, (int)AUDIO_GETINFO, &info);
+	printf(
+	    "audio: samples %d, channels %d, precision %d, encoding %d\n",
+	    info.record.sample_rate, info.record.channels,
+	    info.record.precision, info.record.encoding);
+	printf("audio: gain %d, port %d, buffer %d\n",
+	    info.record.gain, info.record.port,
+	    info.record.buffer_size);
+	printf("audio: gain %d, port %d\n",
+	    info.record.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);
+	printf("audio: monitor %d, muted %d\n",
+	    info.monitor_gain, info.output_muted);
+#endif /* HAVE_SYS_AUDIOIO_H */
+#ifdef __NetBSD__
+	printf("audio: monitor %d, blocksize %d, hiwat %d, lowat %d, mode %d\n",
+	    info.monitor_gain, info.blocksize, info.hiwat, info.lowat, info.mode);
+#endif /* __NetBSD__ */
+}