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#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 "libfec.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 + DROPS];
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", (long)now.tv_sec, (long)now.tv_usec);
return 0;
}
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