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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
**********/
// Copyright (c) 1996-2005, Live Networks, Inc. All rights reserved
// A test program that reads a MPEG-1 or 2 Program Stream file,
// splits it into Audio and Video Elementary Streams,
// and streams both using RTP
// main program
#include "liveMedia.hh"
#include "BasicUsageEnvironment.hh"
#include "GroupsockHelper.hh"
UsageEnvironment* env;
char const* inputFileName = "test.mpg";
MPEG1or2Demux* mpegDemux;
FramedSource* audioSource;
FramedSource* videoSource;
RTPSink* audioSink;
RTPSink* videoSink;
void play(); // forward
// To stream using "source-specific multicast" (SSM), uncomment the following:
//#define USE_SSM 1
#ifdef USE_SSM
Boolean const isSSM = True;
#else
Boolean const isSSM = False;
#endif
// To set up an internal RTSP server, uncomment the following:
//#define IMPLEMENT_RTSP_SERVER 1
// (Note that this RTSP server works for multicast only)
// To stream *only* MPEG "I" frames (e.g., to reduce network bandwidth),
// change the following "False" to "True":
Boolean iFramesOnly = False;
int main(int argc, char** argv) {
// Begin by setting up our usage environment:
TaskScheduler* scheduler = BasicTaskScheduler::createNew();
env = BasicUsageEnvironment::createNew(*scheduler);
// Create 'groupsocks' for RTP and RTCP:
char* destinationAddressStr
#ifdef USE_SSM
= "232.255.42.42";
#else
= "239.255.42.42";
// Note: This is a multicast address. If you wish to stream using
// unicast instead, then replace this string with the unicast address
// of the (single) destination. (You may also need to make a similar
// change to the receiver program.)
#endif
const unsigned short rtpPortNumAudio = 6666;
const unsigned short rtcpPortNumAudio = rtpPortNumAudio+1;
const unsigned short rtpPortNumVideo = 8888;
const unsigned short rtcpPortNumVideo = rtpPortNumVideo+1;
const unsigned char ttl = 7; // low, in case routers don't admin scope
struct in_addr destinationAddress;
destinationAddress.s_addr = our_inet_addr(destinationAddressStr);
const Port rtpPortAudio(rtpPortNumAudio);
const Port rtcpPortAudio(rtcpPortNumAudio);
const Port rtpPortVideo(rtpPortNumVideo);
const Port rtcpPortVideo(rtcpPortNumVideo);
Groupsock rtpGroupsockAudio(*env, destinationAddress, rtpPortAudio, ttl);
Groupsock rtcpGroupsockAudio(*env, destinationAddress, rtcpPortAudio, ttl);
Groupsock rtpGroupsockVideo(*env, destinationAddress, rtpPortVideo, ttl);
Groupsock rtcpGroupsockVideo(*env, destinationAddress, rtcpPortVideo, ttl);
#ifdef USE_SSM
rtpGroupsockAudio.multicastSendOnly();
rtcpGroupsockAudio.multicastSendOnly();
rtpGroupsockVideo.multicastSendOnly();
rtcpGroupsockVideo.multicastSendOnly();
#endif
// Create a 'MPEG Audio RTP' sink from the RTP 'groupsock':
audioSink = MPEG1or2AudioRTPSink::createNew(*env, &rtpGroupsockAudio);
// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidthAudio = 160; // in kbps; for RTCP b/w share
const unsigned maxCNAMElen = 100;
unsigned char CNAME[maxCNAMElen+1];
gethostname((char*)CNAME, maxCNAMElen);
CNAME[maxCNAMElen] = '\0'; // just in case
#ifdef IMPLEMENT_RTSP_SERVER
RTCPInstance* audioRTCP =
#endif
RTCPInstance::createNew(*env, &rtcpGroupsockAudio,
estimatedSessionBandwidthAudio, CNAME,
audioSink, NULL /* we're a server */, isSSM);
// Note: This starts RTCP running automatically
// Create a 'MPEG Video RTP' sink from the RTP 'groupsock':
videoSink = MPEG1or2VideoRTPSink::createNew(*env, &rtpGroupsockVideo);
// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidthVideo = 4500; // in kbps; for RTCP b/w share
#ifdef IMPLEMENT_RTSP_SERVER
RTCPInstance* videoRTCP =
#endif
RTCPInstance::createNew(*env, &rtcpGroupsockVideo,
estimatedSessionBandwidthVideo, CNAME,
videoSink, NULL /* we're a server */, isSSM);
// Note: This starts RTCP running automatically
#ifdef IMPLEMENT_RTSP_SERVER
RTSPServer* rtspServer = RTSPServer::createNew(*env);
// Note that this (attempts to) start a server on the default RTSP server
// port: 554. To use a different port number, add it as an extra
// (optional) parameter to the "RTSPServer::createNew()" call above.
if (rtspServer == NULL) {
*env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
exit(1);
}
ServerMediaSession* sms
= ServerMediaSession::createNew(*env, "testStream", inputFileName,
"Session streamed by \"testMPEG1or2AudioVideoStreamer\"",
isSSM);
sms->addSubsession(PassiveServerMediaSubsession::createNew(*audioSink, audioRTCP));
sms->addSubsession(PassiveServerMediaSubsession::createNew(*videoSink, videoRTCP));
rtspServer->addServerMediaSession(sms);
char* url = rtspServer->rtspURL(sms);
*env << "Play this stream using the URL \"" << url << "\"\n";
delete[] url;
#endif
// Finally, start the streaming:
*env << "Beginning streaming...\n";
play();
env->taskScheduler().doEventLoop(); // does not return
return 0; // only to prevent compiler warning
}
void afterPlaying(void* clientData) {
// One of the sinks has ended playing.
// Check whether any of the sources have a pending read. If so,
// wait until its sink ends playing also:
if (audioSource->isCurrentlyAwaitingData()
|| videoSource->isCurrentlyAwaitingData()) return;
// Now that both sinks have ended, close both input sources,
// and start playing again:
*env << "...done reading from file\n";
audioSink->stopPlaying();
videoSink->stopPlaying();
// ensures that both are shut down
Medium::close(audioSource);
Medium::close(videoSource);
Medium::close(mpegDemux);
// Note: This also closes the input file that this source read from.
// Start playing once again:
play();
}
void play() {
// Open the input file as a 'byte-stream file source':
ByteStreamFileSource* fileSource
= ByteStreamFileSource::createNew(*env, inputFileName);
if (fileSource == NULL) {
*env << "Unable to open file \"" << inputFileName
<< "\" as a byte-stream file source\n";
exit(1);
}
// We must demultiplex Audio and Video Elementary Streams
// from the input source:
mpegDemux = MPEG1or2Demux::createNew(*env, fileSource);
FramedSource* audioES = mpegDemux->newAudioStream();
FramedSource* videoES = mpegDemux->newVideoStream();
// Create a framer for each Elementary Stream:
audioSource
= MPEG1or2AudioStreamFramer::createNew(*env, audioES);
videoSource
= MPEG1or2VideoStreamFramer::createNew(*env, videoES, iFramesOnly);
// Finally, start playing each sink.
*env << "Beginning to read from file...\n";
videoSink->startPlaying(*videoSource, afterPlaying, videoSink);
audioSink->startPlaying(*audioSource, afterPlaying, audioSink);
}
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