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<h1>rtpduphello.cpp</h1>A basic example of how to use <a class="el" href="class_r_t_p_duplex.html">RTPDuplex</a><p>
<div class="fragment"><pre class="fragment"><span class="comment">// rtpduphello. </span>
<span class="comment">// A very simple program for testing and illustrating basic features of ccRTP.</span>
<span class="comment">// Copyright (C) 2001,2002 Federico Montesino <fedemp@altern.org></span>
<span class="comment">// </span>
<span class="comment">// This program is free software; you can redistribute it and/or modify</span>
<span class="comment">// it under the terms of the GNU General Public License as published by</span>
<span class="comment">// the Free Software Foundation; either version 2 of the License, or</span>
<span class="comment">// (at your option) any later version.</span>
<span class="comment">// </span>
<span class="comment">// This program is distributed in the hope that it will be useful,</span>
<span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span class="comment">// GNU General Public License for more details.</span>
<span class="comment">// </span>
<span class="comment">// You should have received a copy of the GNU General Public License</span>
<span class="comment">// along with this program; if not, write to the Free Software</span>
<span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<span class="comment">// This is an introductory example file that illustrates basic usage</span>
<span class="comment">// of ccRTP. You will also see a bit on how to use CommonC++ threads.</span>
<span class="comment">// It is a typical hello world program. It consists of tow duplex</span>
<span class="comment">// connections that talk each other through RTP packets. They do not</span>
<span class="comment">// say more than a typical salutation message. They both send and</span>
<span class="comment">// receive messages, and print the messages they receive.</span>
<span class="preprocessor">#include <cstdio></span>
<span class="preprocessor">#include <cstdlib></span>
<span class="comment">// In order to use ccRTP, the RTP stack of CommonC++, you only need to</span>
<span class="comment">// include ...</span>
<span class="preprocessor">#include <<a class="code" href="ext_8h.html">ccrtp/ext.h</a>></span>
<span class="preprocessor">#ifdef CCXX_NAMESPACES</span>
<span class="preprocessor"></span><span class="keyword">using</span> <span class="keyword">namespace </span>ost;
<span class="keyword">using</span> <span class="keyword">namespace </span>std;
<span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="keyword">class </span>ccRTP_dupHello: <span class="keyword">public</span> Thread
{
<span class="keyword">private</span>:
<span class="comment">// There will be two duplex connections. They both will send</span>
<span class="comment">// and receive packets.</span>
<a name="_a33"></a><a class="code" href="class_r_t_p_duplex.html">RTPDuplex</a> *duplexA, *duplexB;
<span class="keyword">public</span>:
<span class="comment">// Destructor.</span>
~ccRTP_dupHello(){
terminate();
<span class="keyword">delete</span> duplexA;
<span class="keyword">delete</span> duplexB;
}
<span class="comment">// Constructor.</span>
ccRTP_dupHello() : duplexA(NULL), duplexB(NULL)
{ }
<span class="comment">// This method does almost everything.</span>
<span class="keywordtype">void</span> run(<span class="keywordtype">void</span>){
<span class="comment">// redefined from Thread.</span>
<span class="comment">// Before using ccRTP you should learn something about other</span>
<span class="comment">// CommonC++ classes. We need InetHostAddress...</span>
<span class="comment">// Construct loopback address</span>
InetHostAddress local_ip;
local_ip = <span class="stringliteral">"127.0.0.1"</span>;
<span class="comment">// Is that correct?</span>
<span class="keywordflow">if</span>( ! local_ip ){
<span class="comment">// this is equivalent to `! local_ip.isInetAddress()'</span>
cerr << <span class="stringliteral">": IP address is not correct!"</span> << endl;
exit();
}
cout << local_ip.getHostname() <<
<span class="stringliteral">" is going to talk to perself through "</span> <<
local_ip << <span class="stringliteral">"..."</span> << endl;
<span class="comment">// ____Here comes the real RTP stuff____</span>
<span class="comment">// Construct two RTPSocket. 22222 will be the base</span>
<span class="comment">// port of A. 33334 will be the base port of B.</span>
<span class="keyword">const</span> <span class="keywordtype">int</span> A_BASE = 22222;
<span class="keyword">const</span> <span class="keywordtype">int</span> B_BASE = 33334;
duplexA = <span class="keyword">new</span> <a class="code" href="class_r_t_p_duplex.html">RTPDuplex</a>(local_ip,A_BASE,B_BASE);
duplexB = <span class="keyword">new</span> <a class="code" href="class_r_t_p_duplex.html">RTPDuplex</a>(local_ip,B_BASE,A_BASE);
<span class="comment">// Set up A's connection</span>
duplexA->setSchedulingTimeout(90000);
duplexA->setExpireTimeout(2500000);
<span class="keywordflow">if</span>( duplexA->connect(local_ip,B_BASE) < 0 )
cerr << <span class="stringliteral">"Duplex A could not connect."</span>;
<span class="comment">// Set up B's connection</span>
duplexB->setSchedulingTimeout(160000);
duplexB->setExpireTimeout(3500000);
<span class="keywordflow">if</span>( duplexB->connect(local_ip,A_BASE) < 0 )
cerr << <span class="stringliteral">"Duplex B could not connect."</span>;
<span class="comment">// Let's check the queues (you should read the documentation</span>
<span class="comment">// so that you know what the queues are for).</span>
<span class="keywordflow">if</span>( duplexA->RTPDataQueue::isActive() )
cout << <span class="stringliteral">"The queue A is active."</span> << endl;
<span class="keywordflow">else</span>
cerr << <span class="stringliteral">"The queue A is not active."</span> << endl;
<span class="keywordflow">if</span>( duplexB->RTPDataQueue::isActive() )
cout << <span class="stringliteral">"The queue B is active."</span> << endl;
<span class="keywordflow">else</span>
cerr << <span class="stringliteral">"The queue B is not active."</span> << endl;
cout << <span class="stringliteral">"Transmitting..."</span> << endl;
<span class="comment">// This message will be sent on RTP packets, from A to</span>
<span class="comment">// B and from B to A.</span>
<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> helloA[] = <span class="stringliteral">"Hello, brave gnu world from A!"</span>;
<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> helloB[] = <span class="stringliteral">"Hello, brave gnu world from B!"</span>;
<span class="comment">// This is not important</span>
time_t sending_time;
time_t receiving_time;
<span class="keywordtype">char</span> tmstring[30];
<a name="_a34"></a><a class="code" href="class_static_payload_format.html">StaticPayloadFormat</a> pf = <a name="a35"></a><a class="code" href="group__payload.html#gga2a26">sptMP2T</a>;
duplexA->setPayloadFormat(pf);
duplexB->setPayloadFormat(pf);
<span class="comment">// This is the main loop, where packets are sent and receipt.</span>
<span class="comment">// A and B both will send and receive packets.</span>
<span class="keywordflow">for</span>( <span class="keywordtype">int</span> i = 0 ; true ; i++ ){
<span class="comment">// A and B do almost exactly the same things,</span>
<span class="comment">// I have kept this here -out of a send/receive</span>
<span class="comment">// method- in the interest of clarity.</span>
<span class="comment">// A: Send an RTP packet </span>
sending_time = time(NULL);
duplexA->putData(2*(i)*90000,helloA,
strlen((<span class="keywordtype">char</span> *)helloA));
<span class="comment">// Tell it</span>
strftime(tmstring,30,<span class="stringliteral">"%X"</span>,localtime(&sending_time));
cout << <span class="stringliteral">"A: sending message at "</span> << tmstring << <span class="stringliteral">"..."</span>
<< endl;
<span class="comment">// A: Receive an RTP packet</span>
receiving_time = time(NULL);
<span class="keyword">const</span> <a name="_a36"></a><a class="code" href="class_app_data_unit.html">AppDataUnit</a>* aduA =
duplexA->getData(duplexA->getFirstTimestamp());
<span class="keywordflow">if</span> ( aduA ) {
<span class="comment">// Tell it</span>
strftime(tmstring,30,<span class="stringliteral">"%X"</span>,localtime(&receiving_time));
cout << <span class="stringliteral">"A:[receiving at "</span> << tmstring << <span class="stringliteral">"]: "</span> <<
aduA-><a name="a37"></a><a class="code" href="class_app_data_unit.html#a5">getData</a>() << endl;
}
<span class="comment">// Wait for 0.1 seconds</span>
Thread::sleep(100);
<span class="comment">// B: Send an RTP packet </span>
sending_time = time(NULL);
duplexB->putData(2*(i)*90000,helloB,
strlen((<span class="keywordtype">char</span> *)helloB));
<span class="comment">// Tell it</span>
strftime(tmstring,30,<span class="stringliteral">"%X"</span>,localtime(&sending_time));
cout << <span class="stringliteral">"B: sending message at "</span> << tmstring << <span class="stringliteral">"..."</span>
<< endl;
<span class="comment">// B: Receive an RTP packet</span>
receiving_time = time(NULL);
<span class="keyword">const</span> <a class="code" href="class_app_data_unit.html">AppDataUnit</a>* aduB =
duplexB->getData(duplexB->getFirstTimestamp());
<span class="keywordflow">if</span> ( aduB ) {
<span class="comment">// Tell it</span>
strftime(tmstring,30,<span class="stringliteral">"%X"</span>,localtime(&receiving_time));
cout << <span class="stringliteral">"B:[receiving at "</span> << tmstring << <span class="stringliteral">"]: "</span> <<
aduB-><a class="code" href="class_app_data_unit.html#a5">getData</a>() << endl;
}
Thread::sleep(1900);
}
}
};
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])
{
<span class="comment">// Construct the main thread. It will not run yet.</span>
ccRTP_dupHello *hello = <span class="keyword">new</span> ccRTP_dupHello;
cout << <span class="stringliteral">"This is rtpduphello, a very simple test program for ccRTP."</span>
<< endl << <span class="stringliteral">"Strike [Enter] when you are fed up."</span> << endl;
<span class="comment">// Start execution of hello.</span>
hello->start();
cin.get();
cout << endl << <span class="stringliteral">"That's all"</span> << endl;
<span class="keyword">delete</span> hello;
exit(0);
}
</pre></div> <hr size="1"><address style="align: right;"><small>Generated on Fri Dec 9 22:32:03 2005 for ccRTP by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.4 </small></address>
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