int main (int argc, char *argv[]) {
int sockfd;
int len;
int sent;
int transport_fd;
struct sockaddr_in addr;
unsigned long int packet_size;
char* tsfile;
unsigned char* send_buf;
unsigned int bitrate;
unsigned long long int packet_time;
unsigned long long int real_time;
struct timeval time_start;
struct timeval time_stop;
struct timespec nano_sleep_packet;
memset(&addr, 0, sizeof(addr));
memset(&time_start, 0, sizeof(time_start));
memset(&time_stop, 0, sizeof(time_stop));
memset(&nano_sleep_packet, 0, sizeof(nano_sleep_packet));
if(argc < 5 ) {
fprintf(stderr, "Usage: %s file.ts ipaddr port bitrate [ts_packet_per_ip_packet]\n", argv[0]);
fprintf(stderr, "ts_packet_per_ip_packet default is 7\n");
fprintf(stderr, "bit rate refers to transport stream bit rate\n");
fprintf(stderr, "zero bitrate is 100.000.000 bps\n");
return 0;
} else {
tsfile = argv[1];
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(argv[2]);
addr.sin_port = htons(atoi(argv[3]));
bitrate = atoi(argv[4]);
if (bitrate <= 0) {
bitrate = 100000000;
}
if (argc >= 6) {
packet_size = strtoul(argv[5], 0, 0) * TS_PACKET_SIZE;
} else {
packet_size = 7 * TS_PACKET_SIZE;
}
}
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if(sockfd < 0) {
perror("socket(): error ");
return 0;
}
transport_fd = open(tsfile, O_RDONLY);
if(transport_fd < 0) {
fprintf(stderr, "can't open file %s\n", tsfile);
close(sockfd);
return 0;
}
int completed = 0;
send_buf = malloc(packet_size);
packet_time = 0;
real_time = 0;
gettimeofday(&time_start, 0);
while (!completed) {
gettimeofday(&time_stop, 0);
real_time = usecDiff(&time_stop, &time_start);
if (real_time * bitrate > packet_time * 1000000) { /* theorical bits against sent bits */
len = read(transport_fd, send_buf, packet_size);
if(len < 0) {
fprintf(stderr, "ts file read error \n");
completed = 1;
} else if (len == 0) {
fprintf(stderr, "ts sent done\n");
completed = 1;
} else {
sent = sendto(sockfd, send_buf, len, 0, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if(sent <= 0) {
perror("send(): error ");
completed = 1;
} else {
packet_time += packet_size * 8;
}
}
} else {
nanosleep(&nano_sleep_packet, 0);
}
}
close(transport_fd);
close(sockfd);
free(send_buf);
return 0;
}
int main (int argc, char *argv[]) {
int sockfd;
int len;
int sent;
int ret;
int is_multicast;
int transport_fd;
unsigned char option_ttl;
char start_addr[4];
struct sockaddr_in addr;
unsigned long int packet_size;
char* tsfile;
unsigned char* send_buf;
unsigned int bitrate;
unsigned long long int packet_time;
unsigned long long int real_time;
struct timespec time_start;
struct timespec time_stop;
struct timespec nano_sleep_packet;
memset(&addr, 0, sizeof(addr));
memset(&time_start, 0, sizeof(time_start));
memset(&time_stop, 0, sizeof(time_stop));
memset(&nano_sleep_packet, 0, sizeof(nano_sleep_packet));
if(argc < 5 ) {
fprintf(stderr, "Usage: %s file.ts ipaddr port bitrate [ts_packet_per_ip_packet] [udp_packet_ttl]\n", argv[0]);
fprintf(stderr, "ts_packet_per_ip_packet default is 7\n");
fprintf(stderr, "bit rate refers to transport stream bit rate\n");
fprintf(stderr, "zero bitrate is 100.000.000 bps\n");
return 0;
} else {
tsfile = argv[1];
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr(argv[2]);
addr.sin_port = htons(atoi(argv[3]));
bitrate = atoi(argv[4]);
if (bitrate <= 0) {
bitrate = 100000000;
}
if (argc >= 6) {
packet_size = strtoul(argv[5], 0, 0) * TS_PACKET_SIZE;
} else {
packet_size = 7 * TS_PACKET_SIZE;
}
}
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if(sockfd < 0) {
perror("socket(): error ");
return 0;
}
if (argc >= 7) {
option_ttl = atoi(argv[6]);
is_multicast = 0;
memcpy(start_addr, argv[2], 3);
start_addr[3] = 0;
is_multicast = atoi(start_addr);
is_multicast = (is_multicast >= 224) || (is_multicast <= 239);
if (is_multicast) {
ret = setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &option_ttl, sizeof(option_ttl));
} else {
ret = setsockopt(sockfd, IPPROTO_IP, IP_TTL, &option_ttl, sizeof(option_ttl));
}
if(ret < 0) {
perror("ttl configuration fail");
}
}
transport_fd = open(tsfile, O_RDONLY);
if(transport_fd < 0) {
fprintf(stderr, "can't open file %s\n", tsfile);
close(sockfd);
return 0;
}
int completed = 0;
send_buf = malloc(packet_size);
packet_time = 0;
real_time = 0;
nano_sleep_packet.tv_nsec = 665778; /* 1 packet at 100mbps*/
int64_t sleep_time = 0;
clock_gettime(CLOCK_MONOTONIC, &time_start);
while (!completed) {
clock_gettime(CLOCK_MONOTONIC, &time_start);
//while (real_time * bitrate > packet_time * 1000000 && !completed)
int left_len = 5 * bitrate/1000/8/188*188;
while(left_len >0)
{
len = read(transport_fd, send_buf, packet_size);
left_len -=len;
if(len < 0) {
fprintf(stderr, "ts file read error \n");
completed = 1;
} else if (len == 0) {
fprintf(stderr, "ts sent done\n");
completed = 1;
} else {
sent = sendto(sockfd, send_buf, len, 0, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if(sent <= 0) {
perror("send(): error ");
completed = 1;
} else {
packet_time += packet_size * 8;
}
}
}
clock_gettime(CLOCK_MONOTONIC, &time_stop);
real_time = usecDiff(&time_stop, &time_start);
printf("real_time:%d\n",real_time);
//sleep_time = 5*1000-real_time;
sleep_time =5*1000;
if (sleep_time <=0)
sleep_time =0;
printf("sleep_time:%u\n",sleep_time);
usleep(sleep_time);
//nanosleep(&nano_sleep_packet, 0);
}
close(transport_fd);
close(sockfd);
free(send_buf);
return 0;
}
