win10編譯jrtp，並在QT中使用

記 windows 編譯 jrtp，並在QT中使用

編譯環境

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

源碼版本

jthread-1.3.3 + jrtplib-3.11.1

源碼下載網址

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

注意

對於jrtplib而言，jthread爲可選依賴，但建議選用

編譯步驟

1. 下載源碼並解壓
2. 新建文件夾src(存放源碼), build(存放CMAKE生成的文件), install(存放編譯的結果), lib(存放庫文件)
3. 在build和install內都新建兩個文件夾,jthread-1.3.3和jrtplib-3.11.1
4. 運行CMAKE，爲編譯jthread進行配置，指明編譯結果的安裝路徑爲install/jthread-1.3.3
5. 打開Visual Studio 2017，打開build/jthread-1.3.3內的解決方案jthread.sln，在debug-x64模式下生成解決方案，再選中解決方案中的INSTALL項目，單獨生成此項目。然後，修改爲release-x64模式進行相同的操作。
6. 運行CMAKE，爲編譯jrtplib進行配置，配置中指明已編譯的jthread的包含路徑，庫路徑，指明編譯結果的安裝路徑爲install/jrtplib-3.11.1
7. 用Visual Studio 2017打開/build/jrtplib-3.11.1內由CMAKE生成的解決方案jrtplib.sln，在debug-x64和release-x64兩種模式下，都生成一次解決方案，都單獨生成一次項目INSTALL
8. 將編譯生成的所有的jthread和jrtplib的庫，複製到lib文件夾，將此文件夾添加到系統搜索路徑
9. 複製jrtplib源碼包附帶的實例項目example1的代碼，在Qt Creator中創建項目，黏貼代碼，修改pro文件, 運行qmake，即可成功編譯並正常運行。

過程圖示

1. 配置jthread-1.3.3，生成VS2017的解決方案
   
   
2. 打開VS2017，編譯源碼，安裝編譯結果
   
   
   
   jthread編譯結果如下圖:
   
3. 使用CMAKE配置jrtplib源碼
   
   
4. 打開CMAKE針對jrtplib生成的VS2017解決方案，進行編譯，流程與編譯jthread一致，jrtplib編譯結果如下圖
   
5. 把編譯生成的所有庫文件，存放到一個lib文件夾，並把此文件夾添加到系統搜索路徑。
6. 打開QT Creator， 新建測試項目，複製如下源碼到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. 選中項目，右鍵進行添加庫，注意jthread和jrtplib的庫都要添加，下列圖片僅展示添加jthread，jrtplib庫的添加方式如出一轍。
   
   
   
8. 打開pro文件，按自身實際情況稍作修改，注意紅色箭頭處的內容
   
9. 編譯運行即可