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<hr><h1>rtpduphello.cpp</h1>
<p>
<div class="fragment"><pre><font class="comment">// rtpduphello. </font>
<font class="comment">// A very simple program for testing and illustrating basic features of ccRTP.</font>
<font class="comment">// Copyright (C) 2001 Federico Montesino <p5087@quintero.fie.us.es></font>
<font class="comment">// </font>
<font class="comment">// This program is free software; you can redistribute it and/or modify</font>
<font class="comment">// it under the terms of the GNU General Public License as published by</font>
<font class="comment">// the Free Software Foundation; either version 2 of the License, or</font>
<font class="comment">// (at your option) any later version.</font>
<font class="comment">// </font>
<font class="comment">// This program is distributed in the hope that it will be useful,</font>
<font class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
<font class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</font>
<font class="comment">// GNU General Public License for more details.</font>
<font class="comment">// </font>
<font class="comment">// You should have received a copy of the GNU General Public License</font>
<font class="comment">// along with this program; if not, write to the Free Software</font>
<font class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
<font class="comment">// This is an introductory example file that illustrates basic usage</font>
<font class="comment">// of ccRTP. You will also see a bit on how to use CommonC++ threads.</font>
<font class="comment">// It is a typical hello world program. It consists of tow duplex</font>
<font class="comment">// connections that talk each other through RTP packets. They do not</font>
<font class="comment">// say more than a typical salutation message. They both send and</font>
<font class="comment">// receive messages, and print the messages they receive.</font>
<font class="comment">// In order to use ccRTP, the RTP stack of CommonC++, you only need to</font>
<font class="comment">// include ...</font>
<font class="preprocessor">#include <cc++/<a class="code" href="rtp_h.html">rtp.h</a>></font>
<font class="keyword">class </font>ccRTP_dupHello: <font class="keyword">public</font> <a name="_a0"></a><a class="code" href="class_Thread.html">Thread</a>
{
<font class="keyword">private</font>:
<font class="comment">// There will be two duplex connections. They both will send</font>
<font class="comment">// and receive packets.</font>
<a name="_a1"></a><a class="code" href="class_RTPDuplex.html">RTPDuplex</a> *duplexA, *duplexB;
<font class="keyword">public</font>:
<font class="comment">// Destructor.</font>
~ccRTP_dupHello()<font class="keyword"></font>{
Terminate();
<font class="keyword">delete</font> duplexA;
<font class="keyword">delete</font> duplexB;
}
<font class="comment">// Constructor.</font>
ccRTP_dupHello()<font class="keyword"></font>{
duplexA = duplexB = NULL;
}
<font class="comment">// This method does almost everything.</font>
<font class="keywordtype">void</font> Run(<font class="keywordtype">void</font>)<font class="keyword"></font>{
<font class="comment">// redefined from Thread.</font>
<font class="comment">// Before using ccRTP you should learn something about other</font>
<font class="comment">// CommonC++ classes. We need InetHostAddress...</font>
<font class="comment">// Construct loopback address</font>
InetHostAddress local_ip;
local_ip = <font class="stringliteral">"127.0.0.1"</font>;
<font class="comment">// Is that correct?</font>
<font class="keywordflow">if</font>( ! local_ip ){
<font class="comment">// this is equivalent to `! local_ip.isInetAddress()'</font>
cerr << <font class="stringliteral">": IP address is not correct!"</font> << endl;
exit(1);
}
cout << local_ip.getHostname() <<
<font class="stringliteral">" is going to talk to perself through "</font> <<
local_ip << <font class="stringliteral">"..."</font> << endl;
<font class="comment">// ____Here comes the real RTP stuff____</font>
<font class="comment">// Construct two RTPSocket. 22222 will be the base</font>
<font class="comment">// port of A. 33334 will be the base port of B.</font>
<font class="keyword">const</font> <font class="keywordtype">int</font> A_BASE = 22222;
<font class="keyword">const</font> <font class="keywordtype">int</font> B_BASE = 33334;
duplexA = <font class="keyword">new</font> RTPDuplex(local_ip,A_BASE,B_BASE,0);
duplexB = <font class="keyword">new</font> RTPDuplex(local_ip,B_BASE,A_BASE,0);
<font class="comment">// Set up A's connection</font>
duplexA-><a name="a2"></a><a class="code" href="class_RTPQueue.html#a21">setTimeout</a>(90000);
duplexA-><a name="a3"></a><a class="code" href="class_RTPQueue.html#a22">setExpired</a>(2500000);
<font class="keywordflow">if</font>( duplexA-><a name="a4"></a><a class="code" href="class_RTPDuplex.html#a2">Connect</a>(local_ip,B_BASE) < 0 )
cerr << <font class="stringliteral">"Duplex A could not connect."</font>;
<font class="comment">// Set up B's connection</font>
duplexB-><a class="code" href="class_RTPQueue.html#a21">setTimeout</a>(160000);
duplexB-><a class="code" href="class_RTPQueue.html#a22">setExpired</a>(3500000);
<font class="keywordflow">if</font>( duplexB-><a class="code" href="class_RTPDuplex.html#a2">Connect</a>(local_ip,A_BASE) < 0 )
cerr << <font class="stringliteral">"Duplex B could not connect."</font>;
<font class="comment">// Let's check the queues (you should read the documentation</font>
<font class="comment">// so that you know what the queues are for).</font>
<font class="keywordflow">if</font>( duplexA-><a name="a5"></a><a class="code" href="class_RTPQueue.html#a20">RTPQueue::isActive</a>() )
cout << <font class="stringliteral">"The queue A is active."</font> << endl;
<font class="keywordflow">else</font>
cerr << <font class="stringliteral">"The queue A is not active."</font> << endl;
<font class="keywordflow">if</font>( duplexB-><a class="code" href="class_RTPQueue.html#a20">RTPQueue::isActive</a>() )
cout << <font class="stringliteral">"The queue B is active."</font> << endl;
<font class="keywordflow">else</font>
cerr << <font class="stringliteral">"The queue B is not active."</font> << endl;
cout << <font class="stringliteral">"Transmitting..."</font> << endl;
<font class="comment">// This message will be sent on RTP packets, from A to</font>
<font class="comment">// B and from B to A.</font>
<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> helloA[] = <font class="stringliteral">"Hello, brave gnu world A!"</font>;
<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> helloB[] = <font class="stringliteral">"Hello, brave gnu world B!"</font>;
<font class="comment">// This is not important</font>
time_t sending_time;
time_t receiving_time;
<font class="keywordtype">char</font> tmstring[30];
<font class="comment">// This is the main loop, where packets are sent and receipt.</font>
<font class="comment">// A and B both will send and receive packets.</font>
<font class="keywordflow">for</font>( <font class="keywordtype">int</font> i=0 ; <font class="keyword">true</font> ; i++ ){
<font class="comment">// A and B do almost exactly the same things,</font>
<font class="comment">// I have kept this here -out of a send/receive</font>
<font class="comment">// method- in the interest of clarity.</font>
<font class="comment">// A: Send an RTP packet </font>
sending_time = time(NULL);
duplexA-><a name="a6"></a><a class="code" href="class_RTPQueue.html#a4">putPacket</a>(2*(i)*90000,RTP_PAYLOAD_MP2T,helloA,
strlen((<font class="keywordtype">char</font> *)helloA));
<font class="comment">// Tell it</font>
strftime(tmstring,30,<font class="stringliteral">"%X"</font>,localtime(&sending_time));
cout << <font class="stringliteral">"A: sending message at "</font> << tmstring << <font class="stringliteral">"..."</font>
<< endl;
<font class="comment">// A: Receive an RTP packet</font>
<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> bufferA[50] = <font class="stringliteral">"empty"</font>;
receiving_time = time(NULL);
duplexA-><a name="a7"></a><a class="code" href="class_RTPQueue.html#a8">getPacket</a>(duplexA-><a name="a8"></a><a class="code" href="class_RTPQueue.html#a6">getFirstTimestamp</a>(),
bufferA,50);
<font class="comment">// Tell it</font>
strftime(tmstring,30,<font class="stringliteral">"%X"</font>,localtime(&receiving_time));
cout << <font class="stringliteral">"A:[receiving at "</font> << tmstring << <font class="stringliteral">"]: "</font> <<
bufferA << endl;
<font class="comment">// Wait for 0.1 seconds</font>
ccxx_sleep(100);
<font class="comment">// B: Send an RTP packet </font>
sending_time = time(NULL);
duplexB-><a class="code" href="class_RTPQueue.html#a4">putPacket</a>(2*(i)*90000,RTP_PAYLOAD_MP2T,helloB,
strlen((<font class="keywordtype">char</font> *)helloB));
<font class="comment">// Tell it</font>
strftime(tmstring,30,<font class="stringliteral">"%X"</font>,localtime(&sending_time));
cout << <font class="stringliteral">"B: sending message at "</font> << tmstring << <font class="stringliteral">"..."</font>
<< endl;
<font class="comment">// B: Receive an RTP packet</font>
<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> bufferB[50] = <font class="stringliteral">"empty"</font>;
receiving_time = time(NULL);
duplexB-><a class="code" href="class_RTPQueue.html#a8">getPacket</a>(duplexB-><a class="code" href="class_RTPQueue.html#a6">getFirstTimestamp</a>(),
bufferB,50);
<font class="comment">// Tell it</font>
strftime(tmstring,30,<font class="stringliteral">"%X"</font>,localtime(&receiving_time));
cout << <font class="stringliteral">"B:[receiving at "</font> << tmstring << <font class="stringliteral">"]: "</font> <<
bufferB << endl;
ccxx_sleep(1900);
}
}
};
<font class="keywordtype">void</font> main(<font class="keywordtype">int</font> argc, <font class="keywordtype">char</font> *argv[])<font class="keyword"></font>{
<font class="comment">// Construct the main thread. It will not run yet.</font>
ccRTP_dupHello *hello = <font class="keyword">new</font> ccRTP_dupHello;
cout << <font class="stringliteral">"This is rtpduphello, a very simple test program for ccRTP."</font>
<< endl << <font class="stringliteral">"Strike [Enter] when you are fed up."</font> << endl;
<font class="comment">// Start execution of hello.</font>
hello->Start();
cin.get();
cout << endl << <font class="stringliteral">"That's all"</font> << endl;
<font class="keyword">delete</font> hello;
exit(0);
}
</div></pre><hr><address><small>Generated at Fri Oct 5 10:28:25 2001 for ccRTP by
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<img src="doxygen.gif" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.5 written by <a href="mailto:dimitri@stack.nl">Dimitri van Heesch</a>,
© 1997-2001</small></address>
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