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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// A simple UDP source, where every UDP payload is a complete frame
// Implementation
#include "BasicUDPSource.hh"
#include <GroupsockHelper.hh>
BasicUDPSource* BasicUDPSource::createNew(UsageEnvironment& env,
Groupsock* inputGS) {
return new BasicUDPSource(env, inputGS);
}
BasicUDPSource::BasicUDPSource(UsageEnvironment& env, Groupsock* inputGS)
: FramedSource(env), fInputGS(inputGS) {
// Try to use a large receive buffer (in the OS):
increaseReceiveBufferTo(env, inputGS->socketNum(), 50*1024);
}
BasicUDPSource::~BasicUDPSource(){
envir().taskScheduler().turnOffBackgroundReadHandling(fInputGS->socketNum());
}
void BasicUDPSource::doGetNextFrame() {
// Await the next incoming packet:
envir().taskScheduler().turnOnBackgroundReadHandling(fInputGS->socketNum(),
(TaskScheduler::BackgroundHandlerProc*)&incomingPacketHandler, this);
}
void BasicUDPSource::doStopGettingFrames() {
envir().taskScheduler().turnOffBackgroundReadHandling(fInputGS->socketNum());
}
void BasicUDPSource::incomingPacketHandler(BasicUDPSource* source, int /*mask*/){
source->incomingPacketHandler1();
}
void BasicUDPSource::incomingPacketHandler1() {
if (!isCurrentlyAwaitingData()) return; // we're not ready for the data yet
// Read the packet into our desired destination:
struct sockaddr_in fromAddress;
if (!fInputGS->handleRead(fTo, fMaxSize, fFrameSize, fromAddress)) return;
// Tell our client that we have new data:
afterGetting(this); // we're preceded by a net read; no infinite recursion
}
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