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 

 

H264FramedLiveSource.hh

/* * 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: doGetNextFrame(); int TransportData( unsigned char* to, unsigned maxSize ); protected: FILE *fp; }; #endif

H264FramedLiveSource.cpp

/* * Filename: H264FramedLiveSource.cpp * Auther: mlj * Create date: 2013/ 1/22 */ #include H264FramedLiveSource::H264FramedLiveSource( UsageEnvironment& env, char const* fileName, unsigned preferredFrameSize, unsigned playTimePerFrame ) : FramedSource(env) { fp = fopen( fileName, ); } H264FramedLiveSource* H264FramedLiveSource::createNew( UsageEnvironment& env, char const* fileName, unsigned preferredFrameSize , unsigned playTimePerFrame ) { 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, ; }

 

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 

H264LiveVideoServerMediaSubssion.hh

/* * 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 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

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