SessionData.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const SessionData_cxx_Version =
- "$Id: SessionData.cxx,v 1.9 2001/03/23 19:19:08 wjin Exp $";
- #include <unistd.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <errno.h>
- #include "SessionData.hxx"
- SessionData::SessionData()
- : stack(0),
- playFileFd( -1),
- recFileFd( -1),
- state(0),
- pktSize(40)
- {}
- void
- SessionData::receivePacket()
- {
- RtpPacket* packet = 0;
- if (stack)
- {
- cout << "-";
- packet = stack->receive();
- }
- if (packet)
- {
- if (recFileFd >= 0)
- {
- cout << "x";
- if (packet->getPayloadUsage() != (8 * pktSize))
- {
- cout << "not the right size!" << endl;
- }
- write (recFileFd,
- packet->getPayloadLoc(), packet->getPayloadUsage());
- }
- delete packet;
- packet = 0;
- }
- else
- {
- cout << "no packet!" << endl;
- }
- }
- void
- SessionData::transmitPacket()
- {
- RtpPacket* packet = 0;
- if (stack)
- {
- // packet = stack->createPacket(pktSize * 8);
- packet = stack->createPacket();
- if (playFileFd >= 0)
- {
- int bytecount =
- read(playFileFd,
- packet->getPayloadLoc(), packet->getPayloadSize());
- if (bytecount)
- {
- packet->setPayloadUsage (bytecount);
- // outRtpPkt->setRtpTime(audioStack->getPrevRtpTime() + NETWORK_RTP_RATE);
- stack->transmit (packet);
- }
- else
- {
- // this file is now empty -- close and quit
- close(playFileFd);
- playFileFd = -1;
- delete packet;
- packet = 0;
- if (state == 1)
- {
- // i'm done!
- state = 2;
- }
- }
- }
- }
- }
- void SessionData::newStack(
- const string& localPort,
- const string& remoteHost,
- const string& remotePort )
- {
- int localPortNumber = atoi(localPort.c_str());
- int remotePortNumber = atoi(remotePort.c_str());
- if ((localPortNumber < 1024) || (remotePortNumber < 1024))
- {
- return ;
- }
- closeStack();
- stack = new RtpSession(remoteHost.c_str(), remotePortNumber,
- localPortNumber, remotePortNumber + 1,
- localPortNumber + 1, rtpPayloadPCMU,
- rtpPayloadPCMU, 5);
- stack->setApiPktSize (pktSize * 8);
- stack->setNetworkPktSize (pktSize * 8);
- // set SDES information - optional
- RtcpTransmitter* rtcpTran = stack->getRtcpTran();
- rtcpTran->setSdesEmail("development@vovida.com");
- state = 0;
- }
- void
- SessionData::addQueue(const string& str)
- {
- queueList.push_back(str);
- }
- void
- SessionData::shouldUseQueue(bool val)
- {
- if (val)
- {
- if (state == 0)
- {
- state = 2;
- }
- }
- else
- {
- state = 0;
- }
- }
- void
- SessionData::closeStack()
- {
- close(playFileFd);
- close(recFileFd);
- playFileFd = -1;
- recFileFd = -1;
- if (stack)
- {
- stack->transmitRTCPBYE();
- delete stack;
- }
- state = 0;
- stack = 0;
- }
- void
- SessionData::setPktSize(int size)
- {
- pktSize = size;
- }
- void
- SessionData::setPlayFile(const string& filename)
- {
- cout << "playing file: " << filename << endl;
- if (playFileFd >= 0)
- {
- close(playFileFd);
- }
- // do something about this
- int fd = open(filename.c_str(), O_RDONLY);
- if (fd < 0)
- {
- cout << "error opening file for reading: " << filename << endl;
- cout << "reason: " << strerror(errno) << endl;
- // this is an error
- }
- playFileFd = fd;
- }
- void SessionData::stopRecord()
- {
- // stop recording
- close(recFileFd);
- recFileFd = -1;
- }
- void SessionData::setRecordFile(const string& filename)
- {
- cout << "record file: " << filename << endl;
- if (recFileFd >= 0)
- {
- close(recFileFd);
- }
- // do something about this
- int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR);
- if (fd < 0)
- {
- cout << "error opening file for writing!" << endl;
- cout << "reason: " << strerror(errno) << endl;
- // this is an error
- }
- recFileFd = fd;
- }
- void
- SessionData::handleQueue()
- {
- // do something about the queue items
- if (state == 2)
- {
- if (queueList.size())
- {
- string cmd = (queueList.front());
- queueList.pop_front();
- state = 1;
- // now, figure out what this means
- if (cmd.length() >= 2)
- {
- if (cmd[0] == 'p')
- {
- // set the play buffer
- setPlayFile(cmd.substr(2, cmd.length() - 2));
- }
- if (cmd[0] == 'r')
- {
- // set the record buffer
- setRecordFile(cmd.substr(2, cmd.length() - 2));
- }
- }
- }
- else
- {
- // all done!
- state = 0;
- }
- }
- }
- int SessionData::getFd()
- {
- if (stack)
- {
- return stack->getRtpRecv()->getSocketFD();
- }
- else
- {
- return -1;
- }
- }
- void SessionData::periodicProcess()
- {
- VTime currentTime;
- int deltaMs =
- currentTime - lastTimePktSent;
- if (deltaMs > (pktSize - 2))
- {
- // send a packet
- transmitPacket();
- lastTimePktSent = lastTimePktSent + pktSize;
- }
- if (state == 2)
- {
- handleQueue();
- }
- if (stack)
- {
- stack->processRTCP();
- }
- }