Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | // rtphello |
| 2 | // A very simple program for testing and illustrating basic features of ccRTP. |
| 3 | // Copyright (C) 2001,2002 Federico Montesino <fedemp@altern.org> |
| 4 | // |
| 5 | // This program is free software; you can redistribute it and/or modify |
| 6 | // it under the terms of the GNU General Public License as published by |
| 7 | // the Free Software Foundation; either version 2 of the License, or |
| 8 | // (at your option) any later version. |
| 9 | // |
| 10 | // This program is distributed in the hope that it will be useful, |
| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | // GNU General Public License for more details. |
| 14 | // |
| 15 | // You should have received a copy of the GNU General Public License |
| 16 | // along with this program; if not, write to the Free Software |
| 17 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | |
| 19 | |
| 20 | // This is an introductory example file that illustrates basic usage |
| 21 | // of ccRTP. You will also see a bit on how to use other classes from |
| 22 | // CommonC++. |
| 23 | |
| 24 | // I am a typical hello world program. I consist of a sender thread, |
| 25 | // that sends the salutation message on RTP packets; and a receiver |
| 26 | // thread, that prints the messages. This is a program with an unsual |
| 27 | // structure, the receiver just tries to process the first available |
| 28 | // packet periodically, and both are in the same program. Thus, it |
| 29 | // should not be seen as an example for typical applications but as a |
| 30 | // test of some functions of ccRTP. |
| 31 | |
| 32 | #include <cstdio> |
| 33 | #include <ctime> |
| 34 | // In order to use ccRTP, the RTP stack of CommonC++, just include... |
| 35 | #include <ccrtp/rtp.h> |
| 36 | |
| 37 | #ifdef CCXX_NAMESPACES |
| 38 | using namespace ost; |
| 39 | using namespace std; |
| 40 | #endif |
| 41 | |
| 42 | // base ports |
| 43 | const int RECEIVER_BASE = 33634; |
| 44 | const int TRANSMITTER_BASE = 32522; |
| 45 | |
| 46 | // For this example, this is irrelevant. |
| 47 | //const int TIMESTAMP_RATE = 90000; |
| 48 | |
| 49 | /** |
| 50 | * @class ccRTP_Hello_Rx |
| 51 | * Receiver of salutes. |
| 52 | */ |
| 53 | class ccRTP_Hello_Rx: public Thread |
| 54 | { |
| 55 | |
| 56 | private: |
| 57 | // socket to receive packets |
| 58 | RTPSession *socket; |
| 59 | // loopback network address |
| 60 | InetHostAddress local_ip; |
| 61 | // identifier of this sender |
| 62 | uint32 ssrc; |
| 63 | |
| 64 | public: |
| 65 | ccRTP_Hello_Rx(){ |
| 66 | // Before using ccRTP you should learn something about other |
| 67 | // CommonC++ classes. We need InetHostAddress... |
| 68 | |
| 69 | // Construct loopback address |
| 70 | local_ip = "127.0.0.1"; |
| 71 | |
| 72 | // Is that correct? |
| 73 | if( ! local_ip ){ |
| 74 | // this is equivalent to `! local_ip.isInetAddress()' |
| 75 | cerr << "Rx: IP address is not correct!" << endl; |
| 76 | exit(); |
| 77 | } |
| 78 | |
| 79 | // create socket for RTP connection and get a random |
| 80 | // SSRC identifier |
| 81 | socket = new RTPSession(local_ip,RECEIVER_BASE); |
| 82 | ssrc = socket->getLocalSSRC(); |
| 83 | } |
| 84 | |
| 85 | ~ccRTP_Hello_Rx(){ |
| 86 | cout << endl << "Destroying receiver -ID: " << hex |
| 87 | << (int)ssrc; |
| 88 | terminate(); |
| 89 | delete socket; |
| 90 | cout << "... " << "destroyed."; |
| 91 | } |
| 92 | |
| 93 | // This method does almost everything. |
| 94 | void run(void){ |
| 95 | |
| 96 | cout << "Hello, " << defaultApplication(). |
| 97 | getSDESItem(SDESItemTypeCNAME) |
| 98 | << " ..." << endl; |
| 99 | // redefined from Thread. |
| 100 | // Set up connection |
| 101 | socket->setSchedulingTimeout(20000); |
| 102 | socket->setExpireTimeout(3000000); |
| 103 | //socket->UDPTransmit::setTypeOfService(SOCKET_IPTOS_LOWDELAY); |
| 104 | if( !socket->addDestination(local_ip,TRANSMITTER_BASE) ) |
| 105 | cerr << "Rx (" << hex << (int)ssrc |
| 106 | << "): could not connect to port." |
| 107 | << TRANSMITTER_BASE; |
| 108 | |
| 109 | cout << "Rx (" << hex << (int)ssrc |
| 110 | << "): " << local_ip.getHostname() |
| 111 | << " is waiting for salutes in port " |
| 112 | << RECEIVER_BASE << "..." << endl; |
| 113 | |
| 114 | socket->setPayloadFormat(StaticPayloadFormat(sptMP2T)); |
| 115 | socket->startRunning(); |
| 116 | // Let's check the queues (you should read the documentation |
| 117 | // so that you know what the queues are for). |
| 118 | cout << "Rx (" << hex << (int)ssrc |
| 119 | << "): The queue is " |
| 120 | << ( socket->isActive() ? "" : "in") |
| 121 | << "active." << endl; |
| 122 | |
| 123 | // This is the main loop, where packets are received. |
| 124 | for( int i = 0 ; true ; i++ ){ |
| 125 | |
| 126 | // Wait for an RTP packet. |
| 127 | const AppDataUnit *adu = NULL; |
| 128 | while ( NULL == adu ) { |
| 129 | Thread::sleep(10); |
| 130 | adu = socket->getData(socket->getFirstTimestamp()); |
| 131 | } |
| 132 | |
| 133 | // Print content (likely a salute :)) |
| 134 | // Note we are sure the data is an asciiz string. |
| 135 | time_t receiving_time = time(NULL); |
| 136 | char tmstring[30]; |
| 137 | strftime(tmstring,30,"%X",localtime(&receiving_time)); |
| 138 | cout << "Rx (" << hex << (int)ssrc |
| 139 | << "): [receiving at " << tmstring << "]: " |
| 140 | << adu->getData() << endl; |
| 141 | delete adu; |
| 142 | } |
| 143 | } |
| 144 | }; |
| 145 | |
| 146 | /** |
| 147 | * @class ccRTP_Hello_Tx |
| 148 | * Transmitter of salutes. |
| 149 | */ |
| 150 | class ccRTP_Hello_Tx: public Thread, public TimerPort |
| 151 | { |
| 152 | |
| 153 | private: |
| 154 | // socket to transmit |
| 155 | RTPSession *socket; |
| 156 | // loopback network address |
| 157 | InetHostAddress local_ip; |
| 158 | // identifier of this sender |
| 159 | uint32 ssrc; |
| 160 | |
| 161 | public: |
| 162 | ccRTP_Hello_Tx(){ |
| 163 | // Before using ccRTP you should learn something about other |
| 164 | // CommonC++ classes. We need InetHostAddress... |
| 165 | |
| 166 | // Construct loopback address |
| 167 | local_ip = "127.0.0.1"; |
| 168 | |
| 169 | // Is that correct? |
| 170 | if( ! local_ip ){ |
| 171 | // this is equivalent to `! local_ip.isInetAddress()' |
| 172 | cerr << "Tx: IP address is not correct!" << endl; |
| 173 | exit(); |
| 174 | } |
| 175 | |
| 176 | socket = new RTPSession(local_ip,TRANSMITTER_BASE); |
| 177 | ssrc = socket->getLocalSSRC(); |
| 178 | } |
| 179 | |
| 180 | ~ccRTP_Hello_Tx(){ |
| 181 | cout << endl << "Destroying transmitter -ID: " << hex |
| 182 | << (int)ssrc; |
| 183 | terminate(); |
| 184 | delete socket; |
| 185 | cout << "... " << "destroyed."; |
| 186 | } |
| 187 | |
| 188 | // This method does almost everything. |
| 189 | void run(void){ |
| 190 | // redefined from Thread. |
| 191 | cout << "Tx (" << hex << (int)ssrc << "): " << |
| 192 | local_ip.getHostname() |
| 193 | << " is going to salute perself through " |
| 194 | << local_ip << "..." << endl; |
| 195 | |
| 196 | // Set up connection |
| 197 | socket->setSchedulingTimeout(20000); |
| 198 | socket->setExpireTimeout(3000000); |
| 199 | if( !socket->addDestination(local_ip,RECEIVER_BASE) ) |
| 200 | cerr << "Tx (" << hex << (int)ssrc |
| 201 | << "): could not connect to port." |
| 202 | << RECEIVER_BASE; |
| 203 | |
| 204 | cout << "Tx (" << hex << (int)ssrc << |
| 205 | "): Transmitting salutes to port " |
| 206 | << RECEIVER_BASE << "..." << endl; |
| 207 | |
| 208 | uint32 timestamp = 0; |
| 209 | // This will be useful for periodic execution |
| 210 | TimerPort::setTimer(1000); |
| 211 | |
| 212 | // This is the main loop, where packets are sent. |
| 213 | socket->setPayloadFormat(StaticPayloadFormat(sptMP2T)); |
| 214 | socket->startRunning(); |
| 215 | // Let's check the queues (you should read the documentation |
| 216 | // so that you know what the queues are for). |
| 217 | cout << "Tx (" << hex << (int)ssrc << "): The queue is " |
| 218 | << ( socket->isActive()? "" : "in") |
| 219 | << "active." << endl; |
| 220 | |
| 221 | for( int i = 0 ; true ;i++ ){ |
| 222 | |
| 223 | // send RTP packets, providing timestamp, |
| 224 | // payload type and payload. |
| 225 | // construct salute. |
| 226 | unsigned char salute[50]; |
| 227 | snprintf((char *)salute,50, |
| 228 | "Hello, brave gnu world (#%u)!",i); |
| 229 | time_t sending_time = time(NULL); |
| 230 | // get timestamp to send salute |
| 231 | if ( 0 == i ){ |
| 232 | timestamp = socket->getCurrentTimestamp(); |
| 233 | |
| 234 | } else { |
| 235 | // increment for 1 second |
| 236 | timestamp += socket->getCurrentRTPClockRate(); |
| 237 | } |
| 238 | |
| 239 | socket->putData(timestamp,salute, |
| 240 | strlen((char *)salute)+1); |
| 241 | // print info |
| 242 | char tmstring[30]; |
| 243 | strftime(tmstring,30,"%X", |
| 244 | localtime(&sending_time)); |
| 245 | cout << "Tx (" << hex << (int)ssrc |
| 246 | << "): sending salute " << "no " << dec << i |
| 247 | << ", at " << tmstring |
| 248 | << "..." << endl; |
| 249 | |
| 250 | // Let's wait for the next cycle |
| 251 | Thread::sleep(TimerPort::getTimer()); |
| 252 | TimerPort::incTimer(1000); |
| 253 | } |
| 254 | } |
| 255 | }; |
| 256 | |
| 257 | int main(int argc, char *argv[]) |
| 258 | { |
| 259 | |
| 260 | // Construct the two main threads. they will not run yet. |
| 261 | ccRTP_Hello_Rx *receiver = new ccRTP_Hello_Rx; |
| 262 | ccRTP_Hello_Tx *transmitter = new ccRTP_Hello_Tx; |
| 263 | |
| 264 | cout << "This is rtphello, a very simple test program for ccRTP." << |
| 265 | endl << "Strike [Enter] when you are fed up with it." << endl; |
| 266 | |
| 267 | // Start execution of hello now. |
| 268 | receiver->start(); |
| 269 | transmitter->start(); |
| 270 | |
| 271 | cin.get(); |
| 272 | |
| 273 | delete transmitter; |
| 274 | delete receiver; |
| 275 | |
| 276 | cout << endl << "That's all." << endl; |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | /** EMACS ** |
| 282 | * Local variables: |
| 283 | * mode: c++ |
| 284 | * c-basic-offset: 8 |
| 285 | * End: |
| 286 | */ |