RtmpContex * RtmpNewContext( const char * _url, unsigned int _nTimeout,
                                 RtmpPubAudioType _nInputAudioType,
                                 RtmpPubAudioType _nOutputAudioType,
                                 RtmpPubTimeStampPolicy _nTimePolic);

int RtmpConnect( RtmpContex * _pConext);

int RtmpSendAudio( RtmpContex *_pConext, char *_pData,
                   unsigned int _nSize, unsigned int _nPresentationTime );

int RtmpSendVideo( RtmpContex *_pConext, char *_pData,
                   unsigned int _nSize, int _nIsKey, unsigned int _nPresentationTime );

int RtmpDestroy( RtmpContex * _pConext );