win10编译jrtp，并在QT中使用

记 windows 编译 jrtp，并在QT中使用

编译环境

win10 + Visual Studio 2017 + Qt 5.11.3 (Qt Creator 4.7.2)+ CMAKE 3.9.0

源码版本

jthread-1.3.3 + jrtplib-3.11.1

源码下载网址

http://research.edm.uhasselt.be/jori/page/CS/Jrtplib.html

注意

对于jrtplib而言，jthread为可选依赖，但建议选用

编译步骤

1. 下载源码并解压
2. 新建文件夹src(存放源码), build(存放CMAKE生成的文件), install(存放编译的结果), lib(存放库文件)
3. 在build和install内都新建两个文件夹,jthread-1.3.3和jrtplib-3.11.1
4. 运行CMAKE，为编译jthread进行配置，指明编译结果的安装路径为install/jthread-1.3.3
5. 打开Visual Studio 2017，打开build/jthread-1.3.3内的解决方案jthread.sln，在debug-x64模式下生成解决方案，再选中解决方案中的INSTALL项目，单独生成此项目。然后，修改为release-x64模式进行相同的操作。
6. 运行CMAKE，为编译jrtplib进行配置，配置中指明已编译的jthread的包含路径，库路径，指明编译结果的安装路径为install/jrtplib-3.11.1
7. 用Visual Studio 2017打开/build/jrtplib-3.11.1内由CMAKE生成的解决方案jrtplib.sln，在debug-x64和release-x64两种模式下，都生成一次解决方案，都单独生成一次项目INSTALL
8. 将编译生成的所有的jthread和jrtplib的库，复制到lib文件夹，将此文件夹添加到系统搜索路径
9. 复制jrtplib源码包附带的实例项目example1的代码，在Qt Creator中创建项目，黏贴代码，修改pro文件, 运行qmake，即可成功编译并正常运行。

过程图示

1. 配置jthread-1.3.3，生成VS2017的解决方案
   
   
2. 打开VS2017，编译源码，安装编译结果
   
   
   
   jthread编译结果如下图:
   
3. 使用CMAKE配置jrtplib源码
   
   
4. 打开CMAKE针对jrtplib生成的VS2017解决方案，进行编译，流程与编译jthread一致，jrtplib编译结果如下图
   
5. 把编译生成的所有库文件，存放到一个lib文件夹，并把此文件夹添加到系统搜索路径。
6. 打开QT Creator， 新建测试项目，复制如下源码到main.cpp

#include <QCoreApplication>

/*
   Here's a small IPv4 example: it asks for a portbase and a destination and
   starts sending packets to that destination.
*/


#include <WinSock2.h>


#include <jrtplib3/rtpsession.h>
#include <jrtplib3/rtpudpv4transmitter.h>
#include <jrtplib3/rtpipv4address.h>
#include <jrtplib3/rtpsessionparams.h>
#include <jrtplib3/rtperrors.h>
#include <jrtplib3/rtplibraryversion.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <string>

using namespace jrtplib;

//
// This function checks if there was a RTP error. If so, it displays an error
// message and exists.
//

void checkerror(int rtperr)
{
    if (rtperr < 0)
    {
        std::cout << "ERROR: " << RTPGetErrorString(rtperr) << std::endl;
        exit(-1);
    }
}

//
// The main routine
//

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

#ifdef RTP_SOCKETTYPE_WINSOCK
    WSADATA dat;
    WSAStartup(MAKEWORD(2,2),&dat);
#endif // RTP_SOCKETTYPE_WINSOCK

    RTPSession sess;
    uint16_t portbase,destport;
    uint32_t destip;
    std::string ipstr;
    int status,i,num;

    std::cout << "Using version " << RTPLibraryVersion::GetVersion().GetVersionString() << std::endl;

    // First, we'll ask for the necessary information

    std::cout << "Enter local portbase:" << std::endl;
    std::cin >> portbase;
    std::cout << std::endl;

    std::cout << "Enter the destination IP address" << std::endl;
    std::cin >> ipstr;
    destip = inet_addr(ipstr.c_str());
    if (destip == INADDR_NONE)
    {
        std::cerr << "Bad IP address specified" << std::endl;
        return -1;
    }

    // The inet_addr function returns a value in network byte order, but
    // we need the IP address in host byte order, so we use a call to
    // ntohl
    destip = ntohl(destip);

    std::cout << "Enter the destination port" << std::endl;
    std::cin >> destport;

    std::cout << std::endl;
    std::cout << "Number of packets you wish to be sent:" << std::endl;
    std::cin >> num;

    // Now, we'll create a RTP session, set the destination, send some
    // packets and poll for incoming data.

    RTPUDPv4TransmissionParams transparams;
    RTPSessionParams sessparams;

    // IMPORTANT: The local timestamp unit MUST be set, otherwise
    //            RTCP Sender Report info will be calculated wrong
    // In this case, we'll be sending 10 samples each second, so we'll
    // put the timestamp unit to (1.0/10.0)
    sessparams.SetOwnTimestampUnit(1.0/10.0);

    sessparams.SetAcceptOwnPackets(true);
    transparams.SetPortbase(portbase);
    status = sess.Create(sessparams,&transparams);
    checkerror(status);

    RTPIPv4Address addr(destip,destport);

    status = sess.AddDestination(addr);
    checkerror(status);

    for (i = 1 ; i <= num ; i++)
    {
        printf("\nSending packet %d/%d\n",i,num);

        // send the packet
        status = sess.SendPacket((void *)"1234567890",10,0,false,10);
        checkerror(status);

        sess.BeginDataAccess();

        // check incoming packets
        if (sess.GotoFirstSourceWithData())
        {
            do
            {
                RTPPacket *pack;

                while ((pack = sess.GetNextPacket()) != NULL)
                {
                    // You can examine the data here
                    printf("Got packet !\n");

                    // we don't longer need the packet, so
                    // we'll delete it
                    sess.DeletePacket(pack);
                }
            } while (sess.GotoNextSourceWithData());
        }

        sess.EndDataAccess();

#ifndef RTP_SUPPORT_THREAD
        status = sess.Poll();
        checkerror(status);
#endif // RTP_SUPPORT_THREAD

        RTPTime::Wait(RTPTime(1,0));
    }

    sess.BYEDestroy(RTPTime(10,0),0,0);

#ifdef RTP_SOCKETTYPE_WINSOCK
    WSACleanup();
#endif // RTP_SOCKETTYPE_WINSOCK

    return a.exec();
}

7. 选中项目，右键进行添加库，注意jthread和jrtplib的库都要添加，下列图片仅展示添加jthread，jrtplib库的添加方式如出一辙。
   
   
   
8. 打开pro文件，按自身实际情况稍作修改，注意红色箭头处的内容
   
9. 编译运行即可