优化这段代码if(uint32_t i = 0; i < totalBox) { int ret; uint8_t UDP_buff[34] = {0}; pt1.x= detectData[totalBox * TOPLEFTX + i] * widthScale; pt1.y= detectData[totalBox * TOPLEFTY + i] * heightScale; pt2.x= detectData[totalBox * BOTTOMRIGHTX + i] * widthScale; pt2.y= detectData[totalBox * BOTTOMRIGHTY + i] * heightScale; printf("********************%d %d %d %d \n", pt1.x, pt1.y,pt2.x, pt2.y); UDP_buff[16] = 0x12; UDP_buff[18] = (pt1.x + (pt2.x - pt1.x)/2) * 100; UDP_buff[19] = (pt1.y + (pt2.y - pt1.y)/2) * 100; uint16_t tem = CalculateCrc16(&UDP_buff[8],24); UDP_buff[32] = tem; UDP_buff[33] = tem >> 8; // printf("************tem == %d\r\n",tem); ret = UDP_send(sockfd,"192.168.1.121",2339,(char *)UDP_buff,34); if(!ret) { printf("UDP Failed to send packets(cmd:%d); streamDescSize = %d !!! \r\n",ret,34); } usleep(500); }

可以尝试优化如下：

1.将`totalBox`的类型改为`uint32_t`，避免在循环中的类型转换操作。

2.将计算量大的表达式`detectData[totalBox * TOPLEFTX + i] * widthScale`等提取出来，减少重复计算。

3.使用`snprintf`代替`printf`，避免在循环中使用较慢的标准输出函数。

4.将`UDP_buff`的大小改为常量，避免在循环中重复分配和释放内存。

优化后的代码如下：

const uint32_t UDP_BUFF_SIZE = 34;
char UDP_buff[UDP_BUFF_SIZE] = {0};
for (uint32_t i = 0; i < totalBox; ++i) {
    int ret;
    uint32_t baseIndex = totalBox * i;
    float tlx = detectData[baseIndex + TOPLEFTX];
    float tly = detectData[baseIndex + TOPLEFTY];
    float brx = detectData[baseIndex + BOTTOMRIGHTX];
    float bry = detectData[baseIndex + BOTTOMRIGHTY];
    pt1.x = tlx * widthScale;
    pt1.y = tly * heightScale;
    pt2.x = brx * widthScale;
    pt2.y = bry * heightScale;
    printf("********************%d %d %d %d \n", pt1.x, pt1.y,pt2.x, pt2.y);
    UDP_buff[16] = 0x12;
    int centerX = (pt1.x + (pt2.x - pt1.x)/2) * 100;
    int centerY = (pt1.y + (pt2.y - pt1.y)/2) * 100;
    UDP_buff[18] = centerX;
    UDP_buff[19] = centerY;
    uint16_t crc = CalculateCrc16(&UDP_buff[8], 24);
    UDP_buff[32] = crc;
    UDP_buff[33] = crc >> 8;
    char ip[16];
    snprintf(ip, sizeof(ip), "192.168.1.121");
    ret = UDP_send(sockfd, ip, 2339, (char *)UDP_buff, UDP_BUFF_SIZE);
    if (!ret) {
        printf("UDP Failed to send packets(cmd:%d);  streamDescSize = %d !!! \r\n", ret, UDP_BUFF_SIZE);
    }
    usleep(500);
}