initial copy

git-svn-id: http://svn.asterisk.org/svn/dahdi/tools/trunk@4335 a0bf4364-ded3-4de4-8d8a-66a801d63aff

1 files changed, 135 insertions, 0 deletions

diff --git a/dahdi_test.c b/dahdi_test.c
new file mode 100644
index 0000000..1ee1a2c
--- /dev/null
+++ b/dahdi_test.c
@@ -0,0 +1,135 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <math.h>
+#include <getopt.h>
+
+#define SIZE 8000
+
+static int pass = 0;
+static float best = 0.0;
+static float worst = 100.0;
+static double total = 0.0;
+static double delay_total = 0.0;
+
+void hup_handler(int sig)
+{
+	printf("\n--- Results after %d passes ---\n", pass);
+	printf("Best: %.3f -- Worst: %.3f -- Average: %f, Difference: %f\n", 
+			best, worst, pass ? total/pass : 100.00, pass ? delay_total/pass : 100);
+	exit(0);
+}
+
+static void usage(char *argv0)
+{
+	char *c;
+	c = strrchr(argv0, '/');
+	if (!c)
+		c = argv0;
+	else
+		c++;
+	fprintf(stderr, 
+		"Usage: %s [-c COUNT] [-v]\n"
+		"    Valid options are:\n"
+		"  -c COUNT    Run just COUNT cycles (otherwise: forever).\n"
+		"  -v          More verbose output.\n"
+		"  -h          This help text.\n"
+	,c);
+}
+
+int main(int argc, char *argv[])
+{
+	int fd;
+	int res;
+	int c;
+	int count=0;
+	int seconds = 0;
+	int curarg = 1;
+	int verbose=0;
+	char buf[8192];
+	float score;
+	float ms;
+	struct timeval start, now;
+	fd = open("/dev/zap/pseudo", O_RDWR);
+	if (fd < 0) {
+		fprintf(stderr, "Unable to open zap interface: %s\n", strerror(errno));
+		exit(1);
+	}
+	
+	while((c = getopt(argc, argv, "c:hv")) != -1) {
+		switch(c) {
+		case 'c':
+			seconds = atoi(optarg);
+			break;
+		case 'h':
+			usage(argv[0]);
+			exit(0);
+			break;
+		case '?':
+			usage(argv[0]);
+			exit(1);
+			break;
+		case 'v':
+			verbose++;
+			break;
+		}
+	}
+	while(curarg < argc) {
+		if (!strcasecmp(argv[curarg], "-v"))
+			verbose++;
+		if (!strcasecmp(argv[curarg], "-c") && argc > curarg)
+			seconds = atoi(argv[curarg + 1]);
+		curarg++;
+	}
+	printf("Opened pseudo zap interface, measuring accuracy...\n");
+	signal(SIGHUP, hup_handler);
+	signal(SIGINT, hup_handler);
+	signal(SIGALRM, hup_handler);
+	/* Flush input buffer */
+	for (count = 0;count < 4; count++)
+		res = read(fd, buf, sizeof(buf));
+	count = 0;
+	ms = 0; /* Makes the compiler happy */
+	if (seconds > 0)
+		alarm(seconds + 1); /* This will give 'seconds' cycles */
+	for(;;) {
+		if (count == 0)
+			ms = 0;
+		gettimeofday(&start, NULL);
+		res = read(fd, buf, sizeof(buf));
+		if (res < 0) {
+			fprintf(stderr, "Failed to read from pseudo interface: %s\n", strerror(errno));
+			exit(1);
+		}
+		count += res;
+		gettimeofday(&now, NULL);
+		ms += (now.tv_sec - start.tv_sec) * 8000;
+		ms += (now.tv_usec - start.tv_usec) / 125.0;
+		if (count >= SIZE) {
+			double percent;
+
+			percent = 100.0 * (count - ms) / count;
+			if (verbose)
+				printf("\n%d zaptel samples in %0.3f system clock sample intervals (%.3f%%)", 
+						count, ms, 100 - percent);
+			else if ((pass % 8) == 7) printf("\n");
+			score = 100.0 - fabs(percent);
+			if (score > best)
+				best = score;
+			if (score < worst)
+				worst = score;
+			if (!verbose)
+				printf("%f%% ", score);
+			total += score;
+			delay_total += 100 - percent;
+			fflush(stdout);
+			count = 0;
+			pass++;
+		}
+	}
+}