【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;
}