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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) 1996-2004, Live Networks, Inc. All rights reserved
// A test program that reads a MPEG-4 Video Elementary Stream file,
// and streams both using RTP, through a remote Darwin Streaming Server.
// main program
#include "liveMedia.hh"
#include "BasicUsageEnvironment.hh"
UsageEnvironment* env;
char const* inputFileName = "test.m4v";
char const* remoteStreamName = "test.sdp"; // the stream name, as served by the DSS
MPEG4VideoStreamFramer* videoSource;
RTPSink* videoSink;
char const* programName;
void usage() {
*env << "usage: " << programName
<< " <Darwin Streaming Server name or IP address>\n";
exit(1);
}
Boolean awaitConfigInfo(RTPSink* sink); // forward
void play(); // forward
int main(int argc, char** argv) {
// Begin by setting up our usage environment:
TaskScheduler* scheduler = BasicTaskScheduler::createNew();
env = BasicUsageEnvironment::createNew(*scheduler);
// Parse command-line arguments:
programName = argv[0];
if (argc != 2) usage();
char const* dssNameOrAddress = argv[1];
// Create a 'Darwin injector' object:
DarwinInjector* injector = DarwinInjector::createNew(*env, programName);
// Create 'groupsocks' for RTP and RTCP.
// (Note: Because we will actually be streaming through a remote Darwin server,
// via TCP, we just use dummy destination addresses, port numbers, and TTLs here.)
struct in_addr dummyDestAddress;
dummyDestAddress.s_addr = 0;
Groupsock rtpGroupsockVideo(*env, dummyDestAddress, 0, 0);
Groupsock rtcpGroupsockVideo(*env, dummyDestAddress, 0, 0);
// Create a 'MPEG-4 Video RTP' sink from the RTP 'groupsock':
videoSink = MPEG4ESVideoRTPSink::createNew(*env, &rtpGroupsockVideo, 96);
// HACK, specifically for MPEG-4 video:
// Before we can use this RTP sink, we need its MPEG-4 'config' information (for
// use in the SDP description). Unfortunately, this config information depends
// on the the properties of the MPEG-4 input data. Therefore, we need to start
// 'playing' this RTP sink from the input source now, and wait until we get
// the needed config information, before continuing:
// that we need:
*env << "Beginning streaming...\n";
play();
if (!awaitConfigInfo(videoSink)) {
*env << "Failed to get MPEG-4 'config' information from input file: "
<< env->getResultMsg() << "\n";
exit(1);
}
// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidthVideo = 500; // 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
RTCPInstance* videoRTCP =
RTCPInstance::createNew(*env, &rtcpGroupsockVideo,
estimatedSessionBandwidthVideo, CNAME,
videoSink, NULL /* we're a server */);
// Note: This starts RTCP running automatically
// Add these to our 'Darwin injector':
injector->addStream(videoSink, videoRTCP);
// Next, specify the destination Darwin Streaming Server:
if (!injector->setDestination(dssNameOrAddress, remoteStreamName,
programName, "LIVE.COM Streaming Media")) {
*env << "injector->setDestination() failed: "
<< env->getResultMsg() << "\n";
exit(1);
}
*env << "Play this stream (from the Darwin Streaming Server) using the URL:\n"
<< "\trtsp://" << dssNameOrAddress << "/" << remoteStreamName << "\n";
env->taskScheduler().doEventLoop(); // does not return
return 0; // only to prevent compiler warning
}
void afterPlaying(void* clientData) {
*env << "...done reading from file\n";
Medium::close(videoSource);
// 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);
}
FramedSource* videoES = fileSource;
// Create a framer for the Video Elementary Stream:
FramedSource* videoSource = MPEG4VideoStreamFramer::createNew(*env, videoES);
// Finally, start playing:
*env << "Beginning to read from file...\n";
videoSink->startPlaying(*videoSource, afterPlaying, videoSink);
}
static char doneFlag = 0;
static void checkForAuxSDPLine(void* clientData) {
RTPSink* sink = (RTPSink*)clientData;
if (sink->auxSDPLine() != NULL) {
// Signal the event loop that we're done:
doneFlag = ~0;
} else {
// No luck yet. Try again, after a brief delay:
int uSecsToDelay = 100000; // 100 ms
env->taskScheduler().scheduleDelayedTask(uSecsToDelay,
(TaskFunc*)checkForAuxSDPLine, sink);
}
}
Boolean awaitConfigInfo(RTPSink* sink) {
// Check whether the sink's 'auxSDPLine()' is ready:
checkForAuxSDPLine(sink);
env->taskScheduler().doEventLoop(&doneFlag);
char const* auxSDPLine = sink->auxSDPLine();
return auxSDPLine != NULL;
}
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