1 files changed, 91 insertions, 0 deletions
diff --git a/misc-utils/fectest.c b/misc-utils/fectest.c
new file mode 100644
index 0000000..fd577f3
--- /dev/null
+++ b/misc-utils/fectest.c
@@ -0,0 +1,91 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "mcast_image.h"
+#include <crc32.h>
+
+#define ERASE_SIZE 131072
+#define NR_PKTS ((ERASE_SIZE + PKT_SIZE - 1) / PKT_SIZE)
+#define DROPS 8
+
+int main(void)
+{
+	int i, j;
+	unsigned char buf[NR_PKTS * PKT_SIZE];
+	unsigned char pktbuf[(NR_PKTS + DROPS) * PKT_SIZE];
+	struct fec_parms *fec;
+	unsigned char *srcs[NR_PKTS];
+	unsigned char *pkt[NR_PKTS + DROPS];
+	int pktnr[NR_PKTS + DROPS];
+	struct timeval then, now;
+
+	srand(3453);
+	for (i=0; i < sizeof(buf); i++)
+		if (i < ERASE_SIZE)
+			buf[i] = rand();
+		else
+			buf[i] = 0;
+
+	for (i=0; i < NR_PKTS + DROPS; i++)
+		srcs[i] = buf + (i * PKT_SIZE);
+
+	for (i=0; i < NR_PKTS + DROPS; i++) {
+		pkt[i] = malloc(PKT_SIZE);
+		pktnr[i] = -1;
+	}
+	fec = fec_new(NR_PKTS, NR_PKTS + DROPS);
+	if (!fec) {
+		printf("fec_init() failed\n");
+		exit(1);
+	}
+	j = 0;
+	for (i=0; i < NR_PKTS + DROPS; i++) {
+#if 1
+		if (i == 27  || i == 40  || i == 44 || i == 45 || i == 56 )
+			continue;
+#endif
+		if (i == 69 || i == 93 || i == 103)
+			continue;
+		fec_encode(fec, srcs, pkt[j], i, PKT_SIZE);
+		pktnr[j] = i;
+		j++;
+	}
+	gettimeofday(&then, NULL);
+	if (fec_decode(fec, pkt, pktnr, PKT_SIZE)) {
+		printf("Decode failed\n");
+		exit(1);
+	}
+
+	for (i=0; i < NR_PKTS; i++)
+		memcpy(pktbuf + (i*PKT_SIZE), pkt[i], PKT_SIZE);
+	gettimeofday(&now, NULL);
+	now.tv_sec -= then.tv_sec;
+	now.tv_usec -= then.tv_usec;
+	if (now.tv_usec < 0) {
+		now.tv_usec += 1000000;
+		now.tv_sec--;
+	}
+
+	if (memcmp(pktbuf, buf, ERASE_SIZE)) {
+		int fd;
+		printf("Compare failed\n");
+		fd = open("before", O_WRONLY|O_TRUNC|O_CREAT, 0644);
+		if (fd >= 0)
+			write(fd, buf, ERASE_SIZE);
+		close(fd);
+		fd = open("after", O_WRONLY|O_TRUNC|O_CREAT, 0644);
+		if (fd >= 0)
+			write(fd, pktbuf, ERASE_SIZE);
+
+		exit(1);
+	}
+
+	printf("Decoded in %ld.%06lds\n", now.tv_sec, now.tv_usec);
+	return 0;
+}