【视频开发】【Live555】摄像头采集，264编码，live555直播（0）

参看 有关live555

1.首先需要修改live555，定义从 内存中直接获取source而不是从文件读取source的类。

自己实现的类命名为 H264FramedLiveSource

 

/*
 * Filename: H264FramedLiveSource.hh
 * Auther: chenbin
 * Create date: 2013/ 1/22
 */

#ifndef _H264FRAMEDLIVESOURCE_HH
#define _H264FRAMEDLIVESOURCE_HH

#include <FramedSource.hh>

class H264FramedLiveSource : public FramedSource
{
public:
    static H264FramedLiveSource* createNew(UsageEnvironment& env,
        char const* fileName,
        unsigned preferredFrameSize = 0,
        unsigned playTimePerFrame = 0); 

protected:
    H264FramedLiveSource(UsageEnvironment& env,
        char const* fileName,
        unsigned preferredFrameSize,
        unsigned playTimePerFrame);
    // called only by createNew()
    ~H264FramedLiveSource();

private:
    // redefined virtual functions:
    virtual void doGetNextFrame();
    int TransportData( unsigned char* to, unsigned maxSize );

protected:
    FILE *fp;
};

#endif

/*
 * Filename:  H264FramedLiveSource.cpp
 * Auther:  mlj
 * Create date: 2013/ 1/22
 */

#include "H264FramedLiveSource.hh"

H264FramedLiveSource::H264FramedLiveSource( UsageEnvironment& env,
    char const* fileName,
    unsigned preferredFrameSize,
    unsigned playTimePerFrame )
    : FramedSource(env)
{
     fp = fopen( fileName, "rb" );
}

H264FramedLiveSource* H264FramedLiveSource::createNew( UsageEnvironment& env,
                                           char const* fileName,
                                           unsigned preferredFrameSize /*= 0*/,
                                           unsigned playTimePerFrame /*= 0*/ )
{
    H264FramedLiveSource* newSource = new H264FramedLiveSource(env, fileName, preferredFrameSize, playTimePerFrame);

    return newSource;
}

H264FramedLiveSource::~H264FramedLiveSource()
{
    fclose(fp);
}

long filesize(FILE *stream)
{
    long curpos, length;
    curpos = ftell(stream);
    fseek(stream, 0L, SEEK_END);
    length = ftell(stream);
    fseek(stream, curpos, SEEK_SET);
    return length;
}

void H264FramedLiveSource::doGetNextFrame()
{

    if( filesize(fp) >  fMaxSize)
      fFrameSize = fread(fTo,1,fMaxSize,fp);
    else
    {
        fFrameSize = fread(fTo,1,filesize(fp),fp);
        fseek(fp, 0, SEEK_SET);
    }
    //fFrameSize = fMaxSize;
    nextTask() = envir().taskScheduler().scheduleDelayedTask( 0,
        (TaskFunc*)FramedSource::afterGetting, this);//表示延迟0秒后再执行 afterGetting 函数
    return;
}

在 H264FramedLiveSource::doGetNextFrame() 中，将要发送的内容复制到 fTo，最大为fMaxSize，fFrameSize指示实际发送的内容是多少字节。这里暂时还是从文件读作为测试。

2、定义自己的ServerMedia

/*
 * Filename: H264LiveVideoServerMediaSubssion.hh
 * Auther: mlj
 * Create date: 2013/ 1/22
 */
#ifndef _H264_LIVE_VIDEO_SERVER_MEDIA_SUBSESSION_HH
#define _H264_LIVE_VIDEO_SERVER_MEDIA_SUBSESSION_HH
#include "H264VideoFileServerMediaSubsession.hh"

class H264LiveVideoServerMediaSubssion: public H264VideoFileServerMediaSubsession {

public:
  static H264LiveVideoServerMediaSubssion*
  createNew( UsageEnvironment& env,
               char const* fileName,
                Boolean reuseFirstSource );

protected: // we're a virtual base class
  H264LiveVideoServerMediaSubssion( UsageEnvironment& env, char const* fileName, Boolean reuseFirstSource );
   ~H264LiveVideoServerMediaSubssion();

protected: // redefined virtual functions
   FramedSource* createNewStreamSource(unsigned clientSessionId,
                          unsigned& estBitrate);
public:
   char fFileName[100];

};

#endif

/*
 * Filename: H264LiveVideoServerMediaSubssion.cpp
 * Auther: chenbin
 * Create date: 2012/11/29
 */

#include "H264LiveVideoServerMediaSubssion.hh"
#include "H264FramedLiveSource.hh"
#include "H264VideoStreamFramer.hh"

H264LiveVideoServerMediaSubssion*
H264LiveVideoServerMediaSubssion::createNew( UsageEnvironment& env,
                                             char const* fileName,
                                             Boolean reuseFirstSource )
{
    return new H264LiveVideoServerMediaSubssion( env, fileName, reuseFirstSource );
}

H264LiveVideoServerMediaSubssion::H264LiveVideoServerMediaSubssion( UsageEnvironment& env, char const* fileName, Boolean reuseFirstSource )
: H264VideoFileServerMediaSubsession( env, fileName, reuseFirstSource )
{
    strcpy(fFileName,fileName);
}

H264LiveVideoServerMediaSubssion::~H264LiveVideoServerMediaSubssion()
{
}

FramedSource* H264LiveVideoServerMediaSubssion::createNewStreamSource( unsigned clientSessionId, unsigned& estBitrate )
{
    /* Remain to do : assign estBitrate */
    estBitrate = 1000; // kbps, estimate

    // Create the video source:
    H264FramedLiveSource* liveSource = H264FramedLiveSource::createNew(envir(), fFileName);
    if (liveSource == NULL)
    {
        return NULL;
    }

    // Create a framer for the Video Elementary Stream:
    return H264VideoStreamFramer::createNew(envir(), liveSource);
}

3、主函数

/**********
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
**********/
// Copyright (c) 1996-2012, Live Networks, Inc.  All rights reserved
// A test program that demonstrates how to stream - via unicast RTP
// - various kinds of file on demand, using a built-in RTSP server.
// main program
#include "H264LiveVideoServerMediaSubssion.hh"
#include "H264FramedLiveSource.hh"
#include "liveMedia.hh"
#include "BasicUsageEnvironment.hh"

#pragma comment (lib, "Ws2_32.lib")
#pragma comment (lib, "BasicUsageEnvironment.lib")
#pragma comment (lib, "groupsock.lib")
#pragma comment (lib, "liveMedia.lib")
#pragma comment (lib, "UsageEnvironment.lib")
UsageEnvironment* env;

// To make the second and subsequent client for each stream reuse the same
// input stream as the first client (rather than playing the file from the
// start for each client), change the following "False" to "True":
Boolean reuseFirstSource = False;

// To stream *only* MPEG-1 or 2 video "I" frames
// (e.g., to reduce network bandwidth),
// change the following "False" to "True":
Boolean iFramesOnly = False;

static void announceStream(RTSPServer* rtspServer, ServerMediaSession* sms,
               char const* streamName, char const* inputFileName); // fwd

static char newMatroskaDemuxWatchVariable;
static MatroskaFileServerDemux* demux;
static void onMatroskaDemuxCreation(MatroskaFileServerDemux* newDemux, void* /*clientData*/) {
  demux = newDemux;
  newMatroskaDemuxWatchVariable = 1;
}

int main(int argc, char** argv) {
  // Begin by setting up our usage environment:
  TaskScheduler* scheduler = BasicTaskScheduler::createNew();
  env = BasicUsageEnvironment::createNew(*scheduler);

  UserAuthenticationDatabase* authDB = NULL;
#ifdef ACCESS_CONTROL
  // To implement client access control to the RTSP server, do the following:
  authDB = new UserAuthenticationDatabase;
  authDB->addUserRecord("username1", "password1"); // replace these with real strings
  // Repeat the above with each <username>, <password> that you wish to allow
  // access to the server.
#endif

  // Create the RTSP server:
  RTSPServer* rtspServer = RTSPServer::createNew(*env, 8554, authDB);
  if (rtspServer == NULL) {
    *env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
    exit(1);
  }

  char const* descriptionString
    = "Session streamed by \"testOnDemandRTSPServer\"";

  // Set up each of the possible streams that can be served by the
  // RTSP server.  Each such stream is implemented using a
  // "ServerMediaSession" object, plus one or more
  // "ServerMediaSubsession" objects for each audio/video substream.

  // A H.264 video elementary stream:
  {
    char const* streamName = "h264ESVideoTest";
    char const* inputFileName = "test.264";
    ServerMediaSession* sms
      = ServerMediaSession::createNew(*env, streamName, streamName,
                      descriptionString);
    sms->addSubsession(H264LiveVideoServerMediaSubssion
               ::createNew(*env, inputFileName, reuseFirstSource));//修改为自己实现的servermedia  H264LiveVideoServerMediaSubssion
    rtspServer->addServerMediaSession(sms);

    announceStream(rtspServer, sms, streamName, inputFileName);
  }

  // Also, attempt to create a HTTP server for RTSP-over-HTTP tunneling.
  // Try first with the default HTTP port (80), and then with the alternative HTTP
  // port numbers (8000 and 8080).

  //if (rtspServer->setUpTunnelingOverHTTP(80) || rtspServer->setUpTunnelingOverHTTP(8000) || rtspServer->setUpTunnelingOverHTTP(8080)) {
  //  *env << "\n(We use port " << rtspServer->httpServerPortNum() << " for optional RTSP-over-HTTP tunneling.)\n";
  //} else {
  //  *env << "\n(RTSP-over-HTTP tunneling is not available.)\n";
  //}

  env->taskScheduler().doEventLoop(); // does not return

  return 0; // only to prevent compiler warning
}

static void announceStream(RTSPServer* rtspServer, ServerMediaSession* sms,
               char const* streamName, char const* inputFileName) {
  char* url = rtspServer->rtspURL(sms);
  UsageEnvironment& env = rtspServer->envir();
  env << "\n\"" << streamName << "\" stream, from the file \""
      << inputFileName << "\"\n";
  env << "Play this stream using the URL \"" << url << "\"\n";
  delete[] url;
}

使用 ffplay.exe rtsp://115.156.164.19:8554/h264ESVideoTest 可以播放test.264的视频.

相关配置：live555的四个库放在lib文件夹下。

库目录：G:\workspace\avs\live555test\live555test\lib

包含目录：G:\workspace\avs\live555test\live555test\BasicUsageEnvironment\include;G:\workspace\avs\live555test\live555test\UsageEnvironment\include;G:\workspace\avs\live555test\live555test\liveMedia\include;G:\workspace\avs\live555test\live555test\groupsock\include

源代码 ：

svn checkout http://live555-send-test.googlecode.com/svn/trunk/
live555-send-test-read-only

FROM:  http://www.cnblogs.com/mlj318/archive/2013/01/23/2872932.html