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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 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand, from a MPEG-4 video file.
// Implementation
#include "MPEG4VideoFileServerMediaSubsession.hh"
#include "MPEG4ESVideoRTPSink.hh"
#include "ByteStreamFileSource.hh"
#include "MPEG4VideoStreamFramer.hh"
MPEG4VideoFileServerMediaSubsession*
MPEG4VideoFileServerMediaSubsession::createNew(UsageEnvironment& env,
char const* fileName,
Boolean reuseFirstSource) {
return new MPEG4VideoFileServerMediaSubsession(env, fileName, reuseFirstSource);
}
MPEG4VideoFileServerMediaSubsession
::MPEG4VideoFileServerMediaSubsession(UsageEnvironment& env,
char const* fileName, Boolean reuseFirstSource)
: FileServerMediaSubsession(env, fileName, reuseFirstSource),
fDoneFlag(0) {
}
MPEG4VideoFileServerMediaSubsession
::~MPEG4VideoFileServerMediaSubsession() {
}
static void afterPlayingDummy(void* clientData) {
MPEG4VideoFileServerMediaSubsession* subsess
= (MPEG4VideoFileServerMediaSubsession*)clientData;
subsess->afterPlayingDummy1();
}
void MPEG4VideoFileServerMediaSubsession::afterPlayingDummy1() {
// Unschedule any pending 'checking' task:
envir().taskScheduler().unscheduleDelayedTask(nextTask());
// Signal the event loop that we're done:
setDoneFlag();
}
static void checkForAuxSDPLine(void* clientData) {
MPEG4VideoFileServerMediaSubsession* subsess
= (MPEG4VideoFileServerMediaSubsession*)clientData;
subsess->checkForAuxSDPLine1();
}
void MPEG4VideoFileServerMediaSubsession::checkForAuxSDPLine1() {
if (fDummyRTPSink->auxSDPLine() != NULL) {
// Signal the event loop that we're done:
setDoneFlag();
} else {
// try again after a brief delay:
int uSecsToDelay = 100000; // 100 ms
nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecsToDelay,
(TaskFunc*)checkForAuxSDPLine, this);
}
}
char const* MPEG4VideoFileServerMediaSubsession
::getAuxSDPLine(RTPSink* rtpSink, FramedSource* inputSource) {
// Note: For MPEG-4 video files, the 'config' information isn't known
// until we start reading the file. This means that "rtpSink"s
// "auxSDPLine()" will be NULL initially, and we need to start reading
// data from our file until this changes.
fDummyRTPSink = rtpSink;
// Start reading the file:
fDummyRTPSink->startPlaying(*inputSource, afterPlayingDummy, this);
// Check whether the sink's 'auxSDPLine()' is ready:
checkForAuxSDPLine(this);
envir().taskScheduler().doEventLoop(&fDoneFlag);
char const* auxSDPLine = fDummyRTPSink->auxSDPLine();
return auxSDPLine;
}
FramedSource* MPEG4VideoFileServerMediaSubsession
::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
estBitrate = 500; // kbps, estimate
// Create the video source:
ByteStreamFileSource* fileSource
= ByteStreamFileSource::createNew(envir(), fFileName);
if (fileSource == NULL) return NULL;
fFileSize = fileSource->fileSize();
// Create a framer for the Video Elementary Stream:
return MPEG4VideoStreamFramer::createNew(envir(), fileSource);
}
RTPSink* MPEG4VideoFileServerMediaSubsession
::createNewRTPSink(Groupsock* rtpGroupsock,
unsigned char rtpPayloadTypeIfDynamic,
FramedSource* /*inputSource*/) {
return MPEG4ESVideoRTPSink::createNew(envir(), rtpGroupsock,
rtpPayloadTypeIfDynamic);
}
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