iOS 即时的音频怎么发送和接收

发布网友发布时间：2022-04-22 06:11

共1个回答

热心网友时间：2023-09-29 14:01

1.项目前期工作（配置好环境）
2.发送端文件编写（见下面的send.cpp）
3.接收端文件编写（见下面的receive.cpp）
4.编译文件
（1）发送端
g++ -o send send.cpp -I /usr/local/include/jrtplib3/ -ljrtp
（2）接收端
g++ -o receive receive.cpp -I /usr/local/include/jrtplib3/ -ljrtp
附录：
（1）send.cpp
[cpp]
#include "rtpsession.h"
#include "rtppacket.h"
#include "rtpudpv4transmitter.h"
#include "rtpipv4address.h"
#include "rtpsessionparams.h"
#include "rtperrors.h"
#include "rtpmemorymanager.h"
#ifndef WIN32
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#endif // WIN32
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <string>

//
// 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
//

#ifdef RTP_SUPPORT_THREAD

class MyMemoryManager : public RTPMemoryManager
{
public:
MyMemoryManager()
{
mutex.Init();
alloccount = 0;
freecount = 0;
}
~MyMemoryManager()
{
std::cout << "alloc: " << alloccount << " free: " << freecount << std::endl;
}
void *AllocateBuffer(size_t numbytes, int memtype)
{
mutex.Lock();
void *buf = malloc(numbytes);
std::cout << "Allocated " << numbytes << " bytes at location " << buf << " (memtype = " << memtype << ")" << std::endl;
alloccount++;
mutex.Unlock();
return buf;
}

void FreeBuffer(void *p)
{
mutex.Lock();
std::cout << "Freeing block " << p << std::endl;
freecount++;
free(p);
mutex.Unlock();
}
private:
int alloccount,freecount;
JMutex mutex;
};

#else

class MyMemoryManager : public RTPMemoryManager
{
public:
MyMemoryManager()
{
alloccount = 0;
freecount = 0;
}
~MyMemoryManager()
{
std::cout << "alloc: " << alloccount << " free: " << freecount << std::endl;
}
void *AllocateBuffer(size_t numbytes, int memtype)
{
void *buf = malloc(numbytes);
std::cout << "Allocated " << numbytes << " bytes at location " << buf << " (memtype = " << memtype << ")" << std::endl;
alloccount++;
return buf;
}

void FreeBuffer(void *p)
{
std::cout << "Freeing block " << p << std::endl;
freecount++;
free(p);
}
private:
int alloccount,freecount;
};

#endif // RTP_SUPPORT_THREAD

int main(void)
{
#ifdef WIN32
WSADATA dat;
WSAStartup(MAKEWORD(2,2),&dat);
#endif // WIN32

MyMemoryManager mgr;
RTPSession sess(&mgr);
uint16_t portbase,destport;
uint32_t destip;
std::string ipstr;
int status,i,num;

// 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 WIN32
WSACleanup();
#endif // WIN32
return 0;
}
(2) receive.cpp
[cpp] view plaincopy
#include "rtpsession.h"
#include "rtppacket.h"
#include "rtpudpv4transmitter.h"
#include "rtpipv4address.h"
#include "rtpsessionparams.h"
#include "rtperrors.h"
#ifndef WIN32
#include <netinet/in.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#endif // WIN32
#include "rtpsourcedata.h"
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <string>

//
// 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 new class routine
//