通信接口说明
该接口是视频流引擎正常运行时对外依赖的通信接口。该接口由二次开发者实现,并以动态链接库的形式提供。调用示例如下:
// 函数原型声明,实现由客户提供
using OnNewConnectionCallback = void (*)(int connection);
using RegConnectionCBFunc = int (*)(OnNewConnectionCallback newConnCb);
using CloseConnectionFunc = int (*)(int connection);
using SendFullyFunc = ssize_t (*)(int connection, uint8_t *buf, size_t len);
using RecvFunc = ssize_t (*)(int connection, uint8_t *buf, size_t len);
const char *soPath = "./libCommunication.so";
//服务端收到新连接回调函数,由云手机引擎提供
//输入参数connection代表新连接的有效句柄
static void OnNewConnection(int conn);
void Test()
{
// 动态加载通信动态库的函数符号
void *handle = dlopen(soPath, RTLD_GLOBAL | RTLD_LAZY | RTLD_NODELETE);
RegConnectionCBFunc regConnection = (RegConnectionCBFunc)dlsym(handle, "RegConnectionCB");
CloseConnectionFunc closeConnection = (CloseConnectionFunc)dlsym(handle, "CloseConnection");
SendFullyFunc sendFully = (SendFullyFunc)dlsym(handle, "SendFully");
RecvFunc recvData = (RecvFunc)dlsym(handle, "Recv");
size_t bufSize = 1024;
uint8_t *data = malloc(bufSize);
// 创建连接,连接服务端
int connRet = regConnection(OnNewConnection);
// 发送数据
ssize_t ret = sendFully(conn, data, bufSize);
// 接收数据
ret = recvData(conn, data, bufSize);
// 释放资源
free(data);
closeConnection(conn);
dlclose(handle);
}
各接口的详细描述请参见RegConnectionCB~Recv。
父主题: 视频流引擎对外依赖的通信接口(C)