126 lines
4.6 KiB
C++
Executable File
126 lines
4.6 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
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// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
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// on demand, from a MPEG-4 video file.
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// Implementation
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#include "MPEG4VideoFileServerMediaSubsession.hh"
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#include "MPEG4ESVideoRTPSink.hh"
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#include "ByteStreamFileSource.hh"
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#include "MPEG4VideoStreamFramer.hh"
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MPEG4VideoFileServerMediaSubsession*
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MPEG4VideoFileServerMediaSubsession::createNew(UsageEnvironment& env,
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char const* fileName,
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Boolean reuseFirstSource) {
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return new MPEG4VideoFileServerMediaSubsession(env, fileName, reuseFirstSource);
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}
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MPEG4VideoFileServerMediaSubsession
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::MPEG4VideoFileServerMediaSubsession(UsageEnvironment& env,
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char const* fileName, Boolean reuseFirstSource)
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: FileServerMediaSubsession(env, fileName, reuseFirstSource),
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fAuxSDPLine(NULL), fDoneFlag(0), fDummyRTPSink(NULL) {
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}
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MPEG4VideoFileServerMediaSubsession::~MPEG4VideoFileServerMediaSubsession() {
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delete[] fAuxSDPLine;
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}
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static void afterPlayingDummy(void* clientData) {
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MPEG4VideoFileServerMediaSubsession* subsess
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= (MPEG4VideoFileServerMediaSubsession*)clientData;
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subsess->afterPlayingDummy1();
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}
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void MPEG4VideoFileServerMediaSubsession::afterPlayingDummy1() {
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// Unschedule any pending 'checking' task:
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envir().taskScheduler().unscheduleDelayedTask(nextTask());
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// Signal the event loop that we're done:
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setDoneFlag();
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}
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static void checkForAuxSDPLine(void* clientData) {
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MPEG4VideoFileServerMediaSubsession* subsess
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= (MPEG4VideoFileServerMediaSubsession*)clientData;
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subsess->checkForAuxSDPLine1();
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}
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void MPEG4VideoFileServerMediaSubsession::checkForAuxSDPLine1() {
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char const* dasl;
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if (fAuxSDPLine != NULL) {
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// Signal the event loop that we're done:
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setDoneFlag();
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} else if (fDummyRTPSink != NULL && (dasl = fDummyRTPSink->auxSDPLine()) != NULL) {
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fAuxSDPLine= strDup(dasl);
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fDummyRTPSink = NULL;
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// Signal the event loop that we're done:
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setDoneFlag();
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} else if (!fDoneFlag) {
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// try again after a brief delay:
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int uSecsToDelay = 100000; // 100 ms
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nextTask() = envir().taskScheduler().scheduleDelayedTask(uSecsToDelay,
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(TaskFunc*)checkForAuxSDPLine, this);
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}
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}
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char const* MPEG4VideoFileServerMediaSubsession::getAuxSDPLine(RTPSink* rtpSink, FramedSource* inputSource) {
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if (fAuxSDPLine != NULL) return fAuxSDPLine; // it's already been set up (for a previous client)
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if (fDummyRTPSink == NULL) { // we're not already setting it up for another, concurrent stream
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// Note: For MPEG-4 video files, the 'config' information isn't known
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// until we start reading the file. This means that "rtpSink"s
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// "auxSDPLine()" will be NULL initially, and we need to start reading data from our file until this changes.
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fDummyRTPSink = rtpSink;
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// Start reading the file:
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fDummyRTPSink->startPlaying(*inputSource, afterPlayingDummy, this);
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// Check whether the sink's 'auxSDPLine()' is ready:
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checkForAuxSDPLine(this);
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}
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envir().taskScheduler().doEventLoop(&fDoneFlag);
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return fAuxSDPLine;
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}
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FramedSource* MPEG4VideoFileServerMediaSubsession
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::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
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estBitrate = 500; // kbps, estimate
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// Create the video source:
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ByteStreamFileSource* fileSource
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= ByteStreamFileSource::createNew(envir(), fFileName);
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if (fileSource == NULL) return NULL;
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fFileSize = fileSource->fileSize();
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// Create a framer for the Video Elementary Stream:
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return MPEG4VideoStreamFramer::createNew(envir(), fileSource);
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}
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RTPSink* MPEG4VideoFileServerMediaSubsession
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::createNewRTPSink(Groupsock* rtpGroupsock,
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unsigned char rtpPayloadTypeIfDynamic,
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FramedSource* /*inputSource*/) {
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return MPEG4ESVideoRTPSink::createNew(envir(), rtpGroupsock,
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rtpPayloadTypeIfDynamic);
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}
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