使用live555类库实现的网络直播系统——直播H264文件

    下载live555最新代码，编译生成live555 的库文件：libBasicUsageEnvironment.a  libgroupsock.a  libliveMedia.a  libUsageEnvironment.a ，使用这4个库再加上live555 自带的测试程序，可以很简单的实现live555 的直播。live555提供的直播程序是只能直播之前已经录制好的视频（与点播不同）。代码如下：

/*=============================================================================
FileName: h264live.c
Desc: use the lib of live555 to do live
Author: licaibiao
Version:
LastChange: 2017-02-23
*=============================================================================*/
#include "h264live.hh"

UsageEnvironment* env;
char const* inputFileName = "test.264";
H264VideoStreamFramer* videoSource;
RTPSink* videoSink;

void play(); // forward

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:
struct in_addr destinationAddress;
destinationAddress.s_addr = chooseRandomIPv4SSMAddress(*env);
// Note: This is a multicast address.  If you wish instead to stream
// using unicast, then you should use the "testOnDemandRTSPServer"
// test program - not this test program - as a model.

const unsigned short rtpPortNum = 18888;
const unsigned short rtcpPortNum = rtpPortNum+1;
const unsigned char ttl = 255;

const Port rtpPort(rtpPortNum);
const Port rtcpPort(rtcpPortNum);

Groupsock rtpGroupsock(*env, destinationAddress, rtpPort, ttl);
rtpGroupsock.multicastSendOnly(); // we're a SSM source
Groupsock rtcpGroupsock(*env, destinationAddress, rtcpPort, ttl);
rtcpGroupsock.multicastSendOnly(); // we're a SSM source

// Create a 'H264 Video RTP' sink from the RTP 'groupsock':
OutPacketBuffer::maxSize = 100000;
videoSink = H264VideoRTPSink::createNew(*env, &rtpGroupsock, 96);

// Create (and start) a 'RTCP instance' for this RTP sink:
const unsigned estimatedSessionBandwidth = 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* rtcp
= RTCPInstance::createNew(*env, &rtcpGroupsock,
estimatedSessionBandwidth, CNAME,
videoSink, NULL /* we're a server */,
True /* we're a SSM source */);
// Note: This starts RTCP running automatically

RTSPServer* rtspServer = RTSPServer::createNew(*env, 8554);
if (rtspServer == NULL) {
*env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
exit(1);
}
ServerMediaSession* sms
= ServerMediaSession::createNew(*env, "testStream", inputFileName,
"Session streamed by \"testH264VideoStreamer\"",
True /*SSM*/);
sms->addSubsession(PassiveServerMediaSubsession::createNew(*videoSink, rtcp));
rtspServer->addServerMediaSession(sms);

char* url = rtspServer->rtspURL(sms);
*env << "Play this stream using the URL \"" << url << "\"\n";
delete[] url;

// 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*/) {
*env << "...done reading from file\n";
videoSink->stopPlaying();
Medium::close(videoSource);
// Note that 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:
videoSource = H264VideoStreamFramer::createNew(*env, videoES);

// Finally, start playing:
*env << "Beginning to read from file...\n";
videoSink->startPlaying(*videoSource, afterPlaying, videoSink);
}

Makefile 文件如下：

INCLUDES = -I./include/usageEnvironment/ -I./include/groupsock/ -I.include/liveMedia/ -I.include/BasicUsageEnvironment
COMPILE_OPTS = $(INCLUDES) -I. -O2 -DSOCKLEN_T=socklen_t -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64
C = c
C_COMPILER = cc
C_FLAGS = $(COMPILE_OPTS) $(CPPFLAGS) $(CFLAGS)
CPP = cpp
CPLUSPLUS_COMPILER = c++
CPLUSPLUS_FLAGS = $(COMPILE_OPTS) -Wall -DBSD=1 $(CPPFLAGS) $(CXXFLAGS)
OBJ = o
LINK = c++ -o
LINK_OPTS = -L. $(LDFLAGS)
CONSOLE_LINK_OPTS = $(LINK_OPTS)

USAGE_ENVIRONMENT_LIB = ./lib/libUsageEnvironment.a
BASIC_USAGE_ENVIRONMENT_LIB = ./lib/libBasicUsageEnvironment.a
LIVEMEDIA_LIB = ./lib/libliveMedia.a
GROUPSOCK_LIB = ./lib/libgroupsock.a
LOCAL_LIBS = $(LIVEMEDIA_LIB) $(GROUPSOCK_LIB) $(BASIC_USAGE_ENVIRONMENT_LIB) $(USAGE_ENVIRONMENT_LIB)
LIBS = $(LOCAL_LIBS)

MEDIA_SERVER_OBJS = h264live.$(OBJ)
APP = h264live

.$(C).$(OBJ):
$(C_COMPILER) -c $(C_FLAGS) $<
.$(CPP).$(OBJ):
$(CPLUSPLUS_COMPILER) -c $(CPLUSPLUS_FLAGS) $<

h264live: $(MEDIA_SERVER_OBJS) $(LOCAL_LIBS)
$(LINK)$@ $(CONSOLE_LINK_OPTS) $(MEDIA_SERVER_OBJS) $(LIBS)

clean:
-rm -rf *.$(OBJ) $(APP) core *.core *~ include/*~


工程目录如下：

[root@redhat h264live]# tree -L 2
.
├── h264live
├── h264live.cpp
├── h264live.hh
├── h264live.o
├── include
│   ├── basicUsageEnvironment
│   ├── groupsock
│   ├── liveMedia
│   └── usageEnvironment
├── lib
│   ├── libBasicUsageEnvironment.a
│   ├── libgroupsock.a
│   ├── libliveMedia.a
│   └── libUsageEnvironment.a
├── Makefile
└── test.264

直接运行h264live文件，然后在客户端打开URL： "rtsp://192.168.0.127:8554/testStream"  就可以收看直播视频。

完整的工程代码：live555实现h264文件直播工程