我写了一个服务器代码作为所有客户端的主服务器。该程序是多线程的，等待客户端连接。一旦创建了所有线程，它们就等待线程接受。一旦接受连接，他们就等待从客户端接收文件。在这些线程接收结束时，所有线程都会加入，以便系统处于共同点。每40秒后重复此行为。
我需要捕获视频帧并传输然后集成在代码中吗？
Server.c
func buildLineInTwoPointsWithRotation(from startPoint: SCNVector3,
to endPoint: SCNVector3,
radius: CGFloat,
color: UIColor) -> SCNNode {
let w = SCNVector3(x: endPoint.x-startPoint.x,
y: endPoint.y-startPoint.y,
z: endPoint.z-startPoint.z)
let l = CGFloat(sqrt(w.x * w.x + w.y * w.y + w.z * w.z))
if l == 0.0 {
// two points together.
let sphere = SCNSphere(radius: radius)
sphere.firstMaterial?.diffuse.contents = color
self.geometry = sphere
self.position = startPoint
return self
}
let cyl = SCNCylinder(radius: radius, height: l)
cyl.firstMaterial?.diffuse.contents = color
self.geometry = cyl
//original vector of cylinder above 0,0,0
let ov = SCNVector3(0, l/2.0,0)
//target vector, in new coordination
let nv = SCNVector3((endPoint.x - startPoint.x)/2.0, (endPoint.y - startPoint.y)/2.0,
(endPoint.z-startPoint.z)/2.0)
// axis between two vector
let av = SCNVector3( (ov.x + nv.x)/2.0, (ov.y+nv.y)/2.0, (ov.z+nv.z)/2.0)
//normalized axis vector
let av_normalized = normalizeVector(av)
let q0 = Float(0.0) //cos(angel/2), angle is always 180 or M_PI
let q1 = Float(av_normalized.x) // x' * sin(angle/2)
let q2 = Float(av_normalized.y) // y' * sin(angle/2)
let q3 = Float(av_normalized.z) // z' * sin(angle/2)
let r_m11 = q0 * q0 + q1 * q1 - q2 * q2 - q3 * q3
let r_m12 = 2 * q1 * q2 + 2 * q0 * q3
let r_m13 = 2 * q1 * q3 - 2 * q0 * q2
let r_m21 = 2 * q1 * q2 - 2 * q0 * q3
let r_m22 = q0 * q0 - q1 * q1 + q2 * q2 - q3 * q3
let r_m23 = 2 * q2 * q3 + 2 * q0 * q1
let r_m31 = 2 * q1 * q3 + 2 * q0 * q2
let r_m32 = 2 * q2 * q3 - 2 * q0 * q1
let r_m33 = q0 * q0 - q1 * q1 - q2 * q2 + q3 * q3
self.transform.m11 = r_m11
self.transform.m12 = r_m12
self.transform.m13 = r_m13
self.transform.m14 = 0.0
self.transform.m21 = r_m21
self.transform.m22 = r_m22
self.transform.m23 = r_m23
self.transform.m24 = 0.0
self.transform.m31 = r_m31
self.transform.m32 = r_m32
self.transform.m33 = r_m33
self.transform.m34 = 0.0
self.transform.m41 = (startPoint.x + endPoint.x) / 2.0
self.transform.m42 = (startPoint.y + endPoint.y) / 2.0
self.transform.m43 = (startPoint.z + endPoint.z) / 2.0
self.transform.m44 = 1.0
return self
}
func normalizeVector(_ iv: SCNVector3) -> SCNVector3 {
let length = sqrt(iv.x * iv.x + iv.y * iv.y + iv.z * iv.z)
if length == 0 {
return SCNVector3(0.0, 0.0, 0.0)
}
return SCNVector3( iv.x / length, iv.y / length, iv.z / length)
client.c
// Server side C/C++ program to demonstrate Socket programming
#include <unistd.h>
#include <stdio.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <string.h>
#include<pthread.h> //for threading , link with lpthread
#define LISTENING_PORT 8080
#define CLIENT_COUNT 4
void * handle_new_conn(void *server_fd)
{
int valread;
char buffer[1024] = {0};
char *hello = "Hello from server";
int new_socket;
struct sockaddr_in address;
int addrlen = sizeof(address);
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons( LISTENING_PORT );
/* Accept connection from client */
if ((new_socket = accept(*((int *)server_fd),
(struct sockaddr *)&address,
(socklen_t*)&addrlen)) < 0)
{
perror("accept");
exit(EXIT_FAILURE);
}
/* Code to handle new connection */
valread = read(new_socket, buffer, 1024);
printf("%s\n", buffer);
sleep(10);
send(new_socket, hello , strlen(hello), 0);
printf("Hello message sent\n");
sleep(2);
close(new_socket);
}
int main(int argc, char const *argv[])
{
int server_fd, new_socket, valread;
struct sockaddr_in address;
int opt = 1;
int addrlen = sizeof(address);
char buffer[1024] = {0};
char *hello = "Hello from server";
pthread_t thread_id[4];
int client_no = 0;
int i;
// Creating socket file descriptor
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0)
{
perror("socket failed");
exit(EXIT_FAILURE);
}
// Forcefully attaching socket to the port 8080
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT,
&opt, sizeof(opt)))
{
perror("setsockopt");
exit(EXIT_FAILURE);
}
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons( LISTENING_PORT );
// Forcefully attaching socket to the port 8080
if (bind(server_fd, (struct sockaddr *)&address,
sizeof(address))<0)
{
perror("bind failed");
exit(EXIT_FAILURE);
}
if (listen(server_fd, CLIENT_COUNT - 1) < 0)
{
perror("listen");
exit(EXIT_FAILURE);
}
while (1)
{
for (i=0; i < CLIENT_COUNT; i++)
{
/* Handle the accepted connection from client */
if (pthread_create(&thread_id[client_no] , NULL,
handle_new_conn, (void*) &server_fd) < 0)
{
perror("Couldn't create thread");
exit(EXIT_FAILURE);
}
client_no++;
}
client_no = 0;
for (i=0; i < CLIENT_COUNT; i++)
{
pthread_join(thread_id[client_no], NULL);
printf("Thread [%d] destroyed\n",
thread_id[client_no]);
client_no++;
}
/* Wait for the next interval to fetch the feed */
sleep(40);
}
return 0;
}